Εκπαίδευση - Σπουδές

  • Διδακτορικό Δίπλωμα, Τμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών, Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)
  • Δίπλωμα Ηλεκτρολόγου Μηχανικού και Μηχανικού Υπολογιστών, Τμήμα Ηλεκτρολόγων Μηχανικών και Μηχανικών Υπολογιστών, Εθνικό Μετσόβιο Πολυτεχνείο (ΕΜΠ)

Ερευνητικά Ενδιαφέροντα

  • Ηλεκτρονικό Επιχειρείν και Ηλεκτρονική Διακυβέρνηση
  • Οργανωσιακή, Σημασιολογική και Τεχνική Διαλειτουργικότητα
  • Συστήματα και Μεθοδολογίες Ηλεκτρονικής Συμμετοχής Πολιτών και Επιχειρήσεων

Διδασκαλία

  • "Τεχνολογία Λογισμικού", Προπτυχιακό Πρόγραμμα Σπουδών, 5ο Εξάμηνο
  • "Ψηφιακή Διακυβέρνηση", Προπτυχιακό Πρόγραμμα Σπουδών, 8ο Εξάμηνο
  • "Ειδικά Θέματα Καινοτομίας και Επιχειρηματικότητας", Μεταπτυχιακό Πρόγραμμα "Ψηφιακή Καινοτομία και Νεοφυής Επιχειρηματικότητα", 1ο Εξάμηνο
  • "Ηλεκτρονική Διακυβέρνηση ΙΙ", Μεταπτυχιακό Πρόγραμμα "Ηλεκτρονική Διακυβέρνηση", 2ο Εξάμηνο
  • "Πληροφοριακά Συστήματα", Μεταπτυχιακό Πρόγραμμα Σπουδών, 1ο Εξάμηνο
  • "Τεχνολογίες Λογισμικού", Μεταπτυχιακό Πρόγραμμα Σπουδών, 2ο Εξάμηνο
  • "Εισαγωγή στην Κοινωνία της Πληροφορίας", Προπτυχιακό Πρόγραμμα Σπουδών, 1ο Εξάμηνο
Ώρες Γραφείου: Τρίτη 12:00 - 15:00

 

Επιτροπές - Διοικητικό έργο

Δημοσιεύσεις σε Διεθνή Περιοδικά (Journals)


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V. Diamantopoulou, A. Androutsopoulou, S. Gritzalis, Υ. Charalabidis, Preserving Digital Privacy in e-Participation Environments: Towards GDPR Compliance, Information - Special Issue "Security Requirements Engineering: Designing Secure Socio-Technical Systems", pp. 1–27, 2020, MDPI, https://www.mdpi.com/journal/inform...
 

Abstract
The application of the General Data Protection Regulation (GDPR) 2016/679/EC, the Regulation for the protection of personal data, is a challenge and must be seen as an opportunity for the redesign of the systems that are being used for the processing of personal data. An unexplored area where systems are being used to collect and process personal data are the e-Participation environment. The latest generations of such environments refer to sociotechnical systems based on the exploitation of the increasing use of Social Media, by using them as valuable tools, able to provide answers and decision support in public policy formulation. This work explores the privacy requirements that GDPR imposes in such environments, contributing to the identification of challenges that e-Participation approaches have to deal with, with regard to privacy protection.

Z. Lachana, M. Loutsaris, C. Alexopoulos, Υ. Charalabidis, Automated Analysis and Interrelation of Legal Elements Based on Text Mining, Digital and Social Transformation for a Better Society and Economic Growth in the Mediterranean Region, Vol. 12, No. 2, 2020, IGI Global, (to_appear),
 

Abstract
One of the most promising developments comes with the use of innovative technologies and thus with the availability of novel services. The combination of text mining with legal elements may contribute to the development of many innovative legal IS. Moreover, in the case of public administrations and governments, the distribution, availability, and access towards legal information are essential and urgent. On the other hand, legal data and law texts are a potential open Government data category in order for innovation to be achieved, regarding the development of new, better, and more cost-effective services for citizens. Those data need to be available 24/7 basis and compliant towards a standard. Yet, there exist some severe issues at the moment regarding this access. This, in turn, makes the use of automated crawling and analysis more than difficult. This paper describes the "Peri Nomou" system: an innovative legal information system for Greek laws utilising text mining techniques to indexing legal documents, identifying correlations and dividing legal documents into their articles.

A. Androutsopoulou, N. Karacapilidis, E. Loukis, Υ. Charalabidis, Transforming the communication between citizens and government through AI-guided chatbots, Government Information Quarterly, Vol. 36, No. 2, pp. 358-367, 2019, Elsevier, indexed in SCI-E, IF = 4.009
 

Abstract
Driven by ‘success stories’ reported by private sector firms, government agencies have also started adopting various Artificial Intelligence (AI) technologies in diverse domains (e.g. health, taxation, and education); however, extensive research is required in order to exploit the full potential of AI in the public sector, and leverage various AI technologies to address important problems/needs. This paper makes a contribution in this direction: it presents a novel approach, as well as the architecture of an ICT platform supporting it, for the advanced exploitation of a specific AI technology, namely chatbots, in the public sector in order to address a crucial issue: the improvement of communication between government and citizens (which has for long time been problematic). The proposed approach builds on natural language processing, machine learning and data mining technologies, and leverages existing data of various forms (such as documents containing legislation and directives, structured data from government agencies' operational systems, social media data, etc.), in order to develop a new digital channel of communication between citizens and government. Making use of appropriately structured and semantically annotated data, this channel enables ‘richer’ and more expressive interaction of citizens with government in everyday language, facilitating and advancing both information seeking and conducting of transactions. Compared to existing digital channels, the proposed approach is appropriate for a wider range of citizens' interactions, with higher levels of complexity, ambiguity and uncertainty. In close co-operation with three Greek government agencies (the Ministry of Finance, a social security organization, and a big local government organization), this approach has been validated through a series of application scenarios.

A. Androutsopoulou, N. Karacapilidis, E. Loukis, Υ. Charalabidis, Combining Technocrats’ Expertise with Public Opinion through an Innovative e-Participation Platform, IEEE Transactions on Emerging Topics in Computing, 2019, ΙΕΕΕ, (to_appear), indexed in SCI-E, IF = 3.826
 

Abstract
Abstract— Previous political sciences research has revealed that democracy (democratic institutions, consultations with citizens) and technocracy (specialized knowledge of experts) are the main foundations for the development of effective and socially acceptable public policies, and that there should be balance as well as interaction and exchange of knowledge between them. However, there is a lack of e-participation platforms supporting this required ‘duality’: the collection of policy related information, knowledge and opinions from both citizens and experts, as well as the communication and interaction between them. This paper contributes to filling this critical research gap. It describes the development of an innovative e-participation platform, which supports on one hand structured consultation and argumentation between experts/technocrats concerning important social problems and public policies for addressing them, and on the other hand the collection and interrelation of relevant citizensgenerated textual content from numerous external social media. This platform enables the meaningful combination of technocrats’ expertise with public opinion, allowing the technocrats participating in policy related structured consultations to retrieve, understand and get insights from citizens’ perceptions. Evaluation results show that users appreciate the potential of exploiting the synergy of machine and human reasoning enabled by the proposed platform through a combination of data mining and structured consultation/argumentation - collaborative decision-making services.

C. Alexopoulos, E. Loukis, S. Mouzakitis, M., Petychakis, Υ. Charalabidis, Analysing the Characteristics of Open Government Data Sources in Greece, Journal of the Knowledge Economy, Vol. 9, No. 3, pp. 721-753, 2018, Springer, indexed in SCI-E
 

Abstract
Open government data (OGD) initiatives have proliferated over the last years in many countries all over the world as the result of a long-standing movement towards the ‘open government’ paradigm. These initiatives have been launched and maintained by a variety of government organizations with different strategies and technical capacities, and under different social, political and legal conditions. As a result, the OGD sources (defined as various types of portals enabling access to government datasets by the public through the Internet and providing various capabilities/functionalities in this direction) developed through these initiatives demonstrate a great diversity in both content, functionality and technology. However, limited research has been conducted on these OGD sources for understanding better their main characteristics from various perspectives, and identifying their strengths and weaknesses. This paper contributes to filling this research gap, by presenting an analysis of the thematic, functional, semantic and technological characteristics of OGD sources in Greece. Sixty OGD sources have analysed from these perspectives and statistical analysis of relevant characteristics have been performed. Interesting conclusions have been drawn from this analysis, and based on them recommendations have been formulated for government policy makers, in order to enhance OGD provision in Greece, and increase the social and economic value that can be generated from them.

V. Diamantopoulou, A. Androutsopoulou, Υ. Charalabidis, Towards a Taxonomy of Services Offered by Start-up business Incubators: Insights from the Mediterranean Region, International Journal of Entrepreneurship and Small Business, Vol. 33, No. 4, pp. 494-513, 2017, Inderscience Publishers
 

Abstract
Business incubation aims at stimulating entrepreneurship and nurturing ideas to transform them to viable ventures and drive economic growth. Since the emergence of the concept, some decades ago, the incubation process and its underlying services have been evolved, while incubators around the world are continuously increasing. These incubators vary according to their type, operation model and specialisation. The aim of this paper is to define a comprehensive framework that serves as a basis for the categorisation of all services that can be part of the incubation process. The proposed taxonomy, comprised of 8 core service categories, has then been applied on ten University associated incubators from the Mediterranean region, since the various socio-economic conditions encountered there, cause particular interest in the prospect of entrepreneurship. An indicative sample of five European, Middle East and North African countries (i.e. Italy, Greece, Turkey, Israel, Egypt) has been defined, with the Mediterranean Sea uniting them and shaping their unique characteristics. We selected to focus on the University incubators from this area as they bridge the innovation potential of research and academia communities with the real business world and can underpin a sustainable and robust entrepreneurship model. By mapping the sample with the categories of services they offer, we intended to find out how they differentiate from other types of incubators. It was concluded that University incubators fall shorter only in the provision of administrative services in relation to the typical incubators. However, the purpose of this framework is to be further used as a tool both for policy makers’ and support their resource allocation decisions and help the internal stakeholders of incubator activities identify and adopt best practice models.

E. Loukis, Υ. Charalabidis, A. Androutsopoulou, Promoting open innovation in the public sector through social media monitoring, Government Information Quarterly, Vol. 34, No. 1, pp. 99-109, 2017, Elsevier , , indexed in SCI-E, IF = 2.515
 

Abstract
Motivated by the multiple ‘success stories’ of the open innovation paradigm in the private sector, and also by the increasing complexity of social problems and needs, the public sector has started moving in this direction,attempting to exploit the extensive knowledge of citizens for the development of innovations in public policies and services. As the direct transfer of open innovation methods from the private sector to the public sector is not possible, it is necessary to develop effective ‘citizen-sourcing’ methods, which address the specific needs of the public sector, and then analyze and evaluate them from various political and management sciences' perspectives. This paper makes a two-fold contribution in this direction: i) It evaluates a novel method of monitoring relevant social media (e.g. political blogs, news websites, and also Facebook, Twitter, etc. accounts) by government agencies, by retrieving and making advanced processing of their content, and extracting from it external knowledge about specific domains of government activity or public policies of interest, in order to promote and support open innovation; ii) For this purpose it develops a multi-perspective evaluation framework, based on sound theoretical foundations from the political and management sciences, which can be of wide applicability; it includes three evaluation perspectives: a political perspective (based on the ‘wicked’ social problems theory from the political sciences), a crowd-sourcing perspective (based on previous management sciences research on crowdsourcing) and a diffusion perspective (based on Roger's diffusion of innovation theory from management sciences). The above evaluation provides interesting insights into this novel method of promoting and supporting open innovation in the public sector through social media monitoring, revealing its capabilities and strengths, and at the same time its problems and weaknesses as well, and also ways/interventions for addressing the latter.

E. Loukis, Υ. Charalabidis, A. Androutsopoulou, Promoting Open Innovation in the Public Sector Through Social Media Monitoring, Government Information Quarterly, 2016, Elsevier, indexed in SCI-E, IF = 2.515
 

Abstract
Motivated by the multiple ‘success stories’ of the open innovation paradigmin the private sector, and also by the\r\nincreasing complexity of social problems and needs, the public sector has started moving in this direction,\r\nattempting to exploit the extensive knowledge of citizens for the development of innovations in public policies\r\nand services. As the direct transfer of open innovation methods from the private sector to the public sector is\r\nnot possible, it is necessary to develop effective ‘citizen-sourcing’ methods, which address the specific needs of\r\nthe public sector, and then analyze and evaluate themfromvarious political and management sciences\' perspectives.\r\nThis papermakes a two-fold contribution in this direction: i) It evaluates a novel method of monitoring relevant\r\nsocial media (e.g. political blogs, news websites, and also Facebook, Twitter, etc. accounts) by government\r\nagencies, by retrieving and making advanced processing of their content, and extracting from it external knowledge\r\nabout specific domains of government activity or public policies of interest, in order to promote and support\r\nopen innovation; ii) For this purpose it develops amulti-perspective evaluation framework, based on sound theoretical\r\nfoundations from the political and management sciences, which can be of wide applicability; it includes\r\nthree evaluation perspectives: a political perspective (based on the ‘wicked’ social problems theory fromthe political\r\nsciences), a crowd-sourcing perspective (based on previous management sciences research on crowdsourcing)\r\nand a diffusion perspective (based on Roger\'s diffusion of innovation theory from management sciences).\r\nThe above evaluation provides interesting insights into this novel method of promoting and supporting\r\nopen innovation in the public sector through social media monitoring, revealing its capabilities and strengths,\r\nand at the same time its problems andweaknesses aswell, and also ways/interventions for addressing the latter.

Υ. Charalabidis, C. Alexopoulos, E. Loukis, A taxonomy of open government data research areas and topics, Journal of Organizational Computing and Electronic Commerce , Vol. 26, No. 1-2 , pp. 41-63, 2016, Taylor & Francis, indexed in SCI-E
 

Abstract
The opening of government data, in order to have both social and economic value generated from them, has attracted the attention and interest of both researchers and practitioners from various disciplines, such as information systems, management sciences, political and social sciences and law. Despite the rapid growth of this multidisciplinary research domain, which has led to the emergence and continuous evolution of technologies and management approaches for open government data (OGD), a detailed analysis of the specific areas and topics of this research is still missing. In this paper, a detailed taxonomy of research areas and corresponding research topics of the OGD domain is presented: it includes 4 main research areas (ODG management & policies, infrastructures, interoperability and usage & value), which are further analysed into 35 research topics. An important advantage of this taxonomy, beyond its high level of detail, is that it has been developed through extraction and combination of relevant knowledge from three different kinds of sources: important relevant government policy documents, research literature and experts. For each of these 35 research topics we identified, its research literature has been summarized and main research objectives and directions have been highlighted. Based on the above taxonomy, an extension of the existing in the literature OGD lifecycle has been proposed; also, under-researched topics that require further research have been identified. Our OGD research taxonomy extends and elaborates previous research taxonomies for the ‘ICT-enabled Governance’ and ‘Policy Making 2.0’ domains, which have been developed in the European projects CROSSROAD and CROSSOVER.

C. Alexopoulos, E. Loukis, Υ. Charalabidis, A methodology for determining the value generation mechanism and the improvement priorities of open government data systems, Computer Science and Information Systems, Vol. 13, No. 1, pp. 237–258, 2016, , indexed in SCI-E
 

Abstract
Government agencies all over the world are making big investments for developing information systems that open important data they possess to the society, in order to be used for scientific, commercial and political purposes. It is important to understand what value they create and how, and at the same time – since this is a relatively new type of information systems (IS) – to identify the main improvements they require. This paper contributes in this direction by presenting a methodology for determining the value generation mechanism of open government data (OGD) systems and also priorities for their improvement. It is based on the estimation of a ‗value model‘ of the OGD system under evaluation from users‘ ratings, which consists of several value dimensions and their corresponding value measures, organized in three ‗value layers‘, and also the relations among them. The proposed methodology has been successfully applied to an OGD system developed as part of the European project ENGAGE (‗An Infrastructure for Open, Linked Governmental Data Provision towards Research Communities and Citizens‘), and provided interesting insights and improvement priorities. This first application provides evidence that our methodology can be a useful decision support tool for important ODG systems investment, management and improvement decisions.

Υ. Charalabidis, E. Loukis, A. Androutsopoulou, V. Karkaletsis, A. Triantafillou, Passive crowdsourcing in government using social media, Transforming Government: People, Process and Policy, Vol. 8, No. 2, pp. 283-308, 2014, Emerald, indexed in SCI-E
 

Abstract
Purpose – The purpose of this study is to develop a novel approach to e-participation, which is based on “passive crowdsourcing” by government agencies, exploiting the extensive political content continuously created in numerous Web 2.0 social media (e.g. political blogs and microblogs, news sharing sites and online forums) by citizens without government stimulation, to understand better their needs, issues, opinions, proposals and arguments concerning a particular domain of government activity or public policy. Design/methodology/approach – This approach is developed and elaborated through cooperation with potential users experienced in the design of public policies from three countries (Austria, Greece and the UK), using a combination of quantitative and qualitative techniques: co-operative development of application scenarios, questionnaire surveys, focus groups and workshops and, finally, in-depth interviews. Findings – A process model for the application of the proposed passive crowdsourcing approach has been developed, which is quite different from the one of the usual active crowdsourcing. Based on it, the functional architecture of the required supporting information and communication technologies (ICT) infrastructure has been formulated, and then its technological architecture has been designed, addressing the conflicting requirements: low response time and, at the same time, provision of sufficiently “fresh” content for policymakers. Practical implications – Taking into account that traditionally government agencies monitor what the press writes about them, our research provides a basis for extending efficiently these activities in the new electronic media world (e.g. newspapers websites, blogs and microblogs, online forums, etc.) to understand better the needs, issues, opinions, arguments and proposals raised by the society with respect to important domains of government activity and public policies. Social implications – The proposed approach provides a new channel for the “voice” of the society to be directly communicated to the government so that the latter can design its policies and activities based on the social needs and realities and not on oversimplified models and stereotypes. Originality/value – Our paper proposes a novel approach to e-participation, which exploits the Web 2.0 social media – but in a quite different way from previous approaches – for conducting “passive crowdsourcing”, and elaborates it: it develops an application process model for it and also an ICT infrastructure for supporting it, which are quite different from the ones of the existing “active crowdsourcing” approaches.

Υ. Charalabidis, E. Loukis, A. Androutsopoulou, Fostering Social Innovation through Multiple Social Media, Information Systems Management, Vol. 31, pp. 225–239, 2014, Taylor & Francis, indexed in SCI-E
 

Abstract
Social innovation requires extensive networking, communication, and collaboration among various social actors. This article presents an approach to fostering and supporting social innovation through the combined exploitation of multiple social media. Furthermore, a methodology is developed for evaluating this approach, based on sound theoretical foundations: The wicked problems theory and the diffusion of innovation theory. This methodology is used for evaluating three pilot applications of this approach, organized in cooperation with members of the European Parliament.

L. Spiliotopoulou, Υ. Charalabidis, E. Loukis, V. Diamantopoulou, A framework for advanced social media exploitation in government for crowdsourcing, Transforming Government: People, Process and Policy, Vol. 8, No. 4, pp. 545-568, 2014, Emerald
 

Abstract
Purpose – This paper aims to develop and evaluate, in “real-life” pilot applications, a framework for advanced social media exploitation by government agencies in their policy-making processes to promote public participation and conduct crowdsourcing. Design/methodology/approach – This framework has been developed through cooperation with public sector employees experienced in public policy-making, using both qualitative and quantitative techniques: semi-structured focus group discussions, scenarios development and questionnaire surveys. The evaluation of the framework has been conducted through semi-structured focus group discussions with public sector employees involved in the pilot applications. Findings – A framework has been developed for advanced social media exploitation by government agencies, which is based on the automated posting of policy-related content to multiple social media, and then retrieval and processing of citizens’ interactions with it (e.g. views, likes, comments and retweets), using the application programming interfaces (API) of these social media. Furthermore, a supporting information and communication technologies (ICT) infrastructure and an application process model for it were developed. Its evaluation, based on “real-life” pilot applications, leads to useful insights concerning its capabilities, strengths and weaknesses. Research limitations/implications – The proposed framework has been evaluated in a small number of pilot applications, so further evaluation of it is required, in various types of government agencies and for different kinds of policy consultations. Practical/Implications – The above framework enables government agencies to communicate with wider and more heterogeneous audiences in a short time and at a low cost, increase public participation in their policy-making processes, collect useful knowledge, ideas and opinions from citizens and, finally, design better, more socially rooted, balanced and realistic policies. Originality/value – This research contributes to the development of knowledge concerning advanced practices for effective social media exploitation in government (which is currently limited, despite the considerable relevant knowledge developed in this area for the private sector), by developing and evaluating a framework for advanced and highly automated exploitation of multiple social media by government agencies. Furthermore, an evaluation methodology for such practices has been developed, which is based on sound theoretical foundations.

C. Alexopoulos, E. Loukis, Υ. Charalabidis, A Platform for Closing the Open Data Feedback Loop based on Web2.0 functionality, Journal of eDemocracy, Vol. 6, No. 1, pp. 62-68, 2014,
 

Abstract
One essential characteristic of open data ecosystems is their development through feedback loops, discussions and dynamic data suppliers - user interactions. These user-centric features communicate the users’ needs to the open data community, as well to the public sector organizations responsible for data publication. Addressing these needs by the corresponding public sector organizations, or even by utilising the power of the community as ENGAGE supports, can significantly promote and accelerate innovation. However, such elements appear barely to be part of existing open data practices in the public sector. A survey we conducted has shown that professional open data users find the feedback and discussion on open data infrastructures from their users to their providers as highly useful and important, but they state that they do not know at least one open data infrastructure that provides various types of discussion, and feedback mechanisms. In this paper we describe and discuss an open data platform, which contributes to filling this gap and also present a usage scenario of it, explaining the sequence of using its functionality. The discussed open data infrastructure combines functionalities that aim to close the feedback loop and to return information to public authorities that can be useful for better government data opening and publication, as well as establishing communication channels between all stakeholders. This may effectively lead to the stimulation and facilitation of value generation from open data, as such functionality positions the user at the centre of the open data publication process.

E. Loukis, Υ. Charalabidis, An Empirical Investigation of Information Systems Interoperability Business Value in European Firms, Computers in Industry , Vol. 64, No. 4, pp. 412-420, 2013, Elsevier, indexed in SCI-E, IF = 2.850
 

Abstract
It is widely believed that the establishment of interoperability of the information systems (IS) of a firm with those of its collaborators (e.g. customers, suppliers, business partners) can generate significant business value. However, this has been empirically investigated only to a very limited extent. This paper contributes to filling this research gap by presenting an empirical study of the effect of adopting the three main types of IS interoperability standards (industry-specific, proprietary and XML-based ones) on the four important perspectives/dimensions of business performance proposed by the Balanced Scorecard approach (financial, customers, internal business processes, learning and innovation). Our study is based on a large dataset from 14065 European firms (from 25 countries and 10 sectors) collected through the e-Business Watch Survey of the European Commission. It is concluded that all three examined types of IS interoperability standards increase considerably the positive impact of firm’s information and communication technologies (ICT) infrastructure on the above four perspectives/dimensions of business performance; however, their effects differ significantly. The adoption of industry-specific interoperability standards has the highest positive effects, while XML-based and proprietary standards have similar lower positive effects. Furthermore, these effects of the industry-specific IS interoperability standards are quite strong, as they are of similar magnitude with the corresponding effects of the degree of development of firm’s intra-organizational/internal IS, and of higher magnitude than the corresponding effects of the degree of development of firm’s e-sales IS. These conclusions provide valuable empirical evidence of the multidimensional business value generated by IS interoperability, its big magnitude and its strong dependence on the type of IS interoperability standards adopted.

E. Ferro, E. Loukis, Υ. Charalabidis, M. Osella, Policy Making 2.0: From Theory to Practice, Government Information Quarterly, Vol. 30, pp. 359-368, 2013, Elsevier, indexed in SCI-E, IF = 4.009
 

Abstract
Government agencies are gradually moving from simpler towards more sophisticated and complex practices of social media use, which are characterized by important innovations at the technological, political and organizational level. This paper intends to provide two contributions to the current discourse about such advanced approaches to social media exploitation. The first is of practical nature and has to do with assessing the strengths and the potential and at the same time the weaknesses and the challenges, of a centralized cross-platform approach to social media exploitation by government agencies in their policy making processes. The second contribution is of theoretical nature and consists in the development of a multi-dimensional framework for an integrated evaluation of such advanced practices of social media exploitation in public policy making processes from technological, political and organizational perspectives, which is based on theoretical foundations from various different domains. The proposed framework is applied for the evaluation of a pilot consultation campaign conducted in Italy using multiple social media based on the above approach, concerning the large scale application of a telemedicine program, in the context of an international research project named PADGETS (‘Policy Gadgets Mashing Underlying Group Knowledge in Web 2.0 Media’), and leading to interesting insights.

[17]
R. Jardim-Goncalves, R. Grilo, C. Agostinho, F. Lampathaki, Υ. Charalabidis, Systematisation of Interoperability Body of Knowledge: The foundation for EI as a science, Enterprise Information Systems, Vol. 7, No. 1, pp. 7-32, 2013, Taylor & Francis, http://www.tandfonline.com/doi/abs/...
Υ. Charalabidis, E. Loukis, Participative Public Policy Making Through Multiple Social Media Platforms Utilization, International Journal of Electronic Government Research (SCOPUS), Vol. 8, No. 3, pp. 78-97, 2012, IGI Global, indexed in SCI-E
 

Abstract
This paper describes the research concerning the systematic, intensive and centralized web 2.0 social media exploitation by government agencies for widening and enhancing participative public policy making, which is conducted as part of the research project PADGETS (‘Policy Gadgets Mashing Underlying Group Knowledge in Web 2.0 Media’) partially funded by the European Commission. The proposed approach is based on a central system, which publishes various types of policy-related content (e.g., short text long text, images, video) and micro-applications in multiple social media simultaneously, and also collects from them and processes data on citizens’ interactions (e.g., views, comments, ratings, votes, etc.). This poses difficult research questions and challenges, both technical (analysis and exploitation of social media application programming interfaces (APIs), appropriate design of the central system architecture, processing and integrating the large amounts of collected citizens’ interaction data) and also non-technical (investigation of the value generated by this approach, preconditions for its effective application by government agencies), which are researched in the project. Some first findings on them are presented and discussed.

Υ. Charalabidis, R. Kleinfeld, E. Loukis, Towards a Rationalisation of Social Media Exploitation in Government Policy-Making Processes, European Journal of ePractice, Vol. 16, pp. 77-93, 2012, European Commission
 

Abstract
There has been significant research and practice oriented towards the rational exploitation of the rapidly expanding social media by private sector enterprises. However, much less research and practice have been done in this area with respect to the public sector. This paper explores advanced forms of rational exploitation of social media in government policy-making processes, aiming to strengthen and widen participation of and interaction with citizens, concerning new or existing public policies and services. The proposed approach is based on a platform, which can publish policy-related content and micro-applications towards multiple social media simultaneously, also collect data on citizens’ interaction with them (e.g. views, comments, ratings, votes, etc.), using the application programming interfaces (API) of the targeted social media. The information gathered through social media will then undergo various types of advanced processing (e.g. access analytics, opinion mining, simulation modelling) in order to extract synthetic conclusions from them and provide substantial support to government policy-makers, always respecting data privacy guidelines. In addition, an extension of this ‘stimulated/ guided crowdsourcing’ approach is presented, based on ‘nonmoderated crowdsourcing’ by government agencies. The above approaches allow a more advanced and rational exploitation of social media by government for supporting evidence-based decision and policy making.

[20]
M. Janssen, Υ. Charalabidis, A. Zuiderwijk, Adoption Barriers and Myths of Open Data and Open Government, Information Systems Management, Vol. 29, No. 4, pp. 258-268, 2012, Taylor & Francis, http://www.tandfonline.com/doi/abs/...
E. Loukis, Υ. Charalabidis, J. Millard, From the Special Issue Editors: European Research on Electronic Citizen Participation and Engagement in Public Policy Making, Information Systems Management, Vol. 29, No. 4, pp. 255-257, 2012, Taylor & Francis, indexed in SCI-E
[22]
F. Lampathaki, S. Koussouris, C. Agostinho, R. Jardim-Goncalves, Υ. Charalabidis, J. Psarras, Infusing scientific foundations into Enterprise Interoperability, Computers in Industry, Vol. 63, No. 8, pp. 858–866, 2012, Elsevier Publications, http://www.sciencedirect.com/scienc...
[23]
S. Buckingham Shum, K. Aberer, A. Schmidt, S. Bishop, P. Lukowicz, S. Anderson, Υ. Charalabidis, J. Domingue, S. de Freitas, I. Dunwell, Towards a global participatory platform: Democratising open data, complexity science and collective intelligence, The European Physical Journal Special Topics, Vol. 214, pp. 109-152, 2012, EDP Sciences, http://www.tandfonline.com/doi/pdf/...
E. Loukis, Υ. Charalabidis, Why do eGovernment Projects Fail: Risk Factors of Large Information Systems Projects in the Greek Public Sector – An International Comparison, International Journal of Electronic Government Research, Vol. 7, No. 2, pp. 59-77, 2011, IGI Global, indexed in SCI-E
 

Abstract
This paper presents an empirical study of the risk factors of large governmental information systems (IS) projects. For this purpose the Official Decisions of the Greek Government Information Technology Projects Advisory Committee (ITPAC) concerning 80 large IS projects have been analyzed and interviews with its members have been conducted. From this analysis 21 risk factors have been identified, and further elaborated and associated with inherent particular characteristics of the public sector, extending existing approaches in the literature. A categorization of them with respect to origin revealed that they are associated with the management, the processes, and the content of these projects. Results show that behind the identified risk factors there are political factors, which are associated with intra-organizational and inter-organizational politics and competition, and can be regarded as ‘second level’ risk sources. The risk factors identified in this study are compared with the ones found by similar studies conducted in Hong Kong, Finland, and the United States, and also with the ones mentioned by OECD reports. Similarities and differences are discussed.

[25]
E. Ergazakis, K. Ergazakis, D. Askounis, Υ. Charalabidis, Digital Cities: Towards an integrated decision support methodology, Telematics and Informatics, Vol. 28, pp. 148-162, 2011, Elsevier, http://www.sciencedirect.com/scienc...
[26]
S. Koussouris, Υ. Charalabidis, L. Kipenis, D. Askounis, O. Stavri, Electronic participation pilots in the Western Balkans: lessons from the field, Journal of Balkan and Near Eastern Studies, Vol. 13, No. 1, pp. 37-58, 2011, Taylor & Francis Group, http://www.tandfonline.com/doi/abs/..., indexed in SCI-E
[27]
D. Sarandis, D. Askounis, Υ. Charalabidis, A Goal‐Driven Management Framework for Electronic Government Transformation projects, Government Information Quarterly, Vol. 28, No. 1, pp. 117-128, 2011, Elsevier Publications, http://www.sciencedirect.com/scienc..., indexed in SCI-E
[28]
S. Koussouris, Υ. Charalabidis, D. Askounis, A Review of the European Union eParticipation Action Pilot Projects, Transforming Government: People, Process and Policy (TGPPP), Vol. 5, No. 1, pp. 8 - 19, 2011, Emerald Publications, http://www.emeraldinsight.com/journ...
E. Loukis, A. Macintosh, Υ. Charalabidis, Editorial of the Special Issue on E-Participation in Southern Europe and the Balkans: Issues of democracy and participation via electronic media, Journal of Southern Europe and the Balkans (currently ‘Journal of Balkan and Near Eastern Sudies’), Vol. 13, No. 1, pp. 1-12, 2011, Taylor & Francis, indexed in SCI-E
[30]
O. Markaki, Υ. Charalabidis, D. Askounis, Measuring Interoperability Readiness in South Eastern Europe and the Mediterranean, International Journal of E-Services and Mobile Applications, Vol. 3, No. 2, pp. 73-91, 2011, IGI Global, http://www.igi-global.com/bookstore...
E. Loukis, Υ. Charalabidis, J. Scholl, Editorial on Special Issue Digital Cities, Telematics & Informatics Journal, Vol. 28, No. 3, pp. 143-147, 2011, Elsevier, indexed in SCI-E, IF = 3.789
[32]
M. Janssen, Υ. Charalabidis, G. Kuk, T. Kresswell, Guest Editors, Journal of Theoretical and Applied Electronic Commerce Research, Vol. 6, No. 1, pp. I-VIII, 2011, University of Talca, http://www.scielo.cl/pdf/jtaer/v6n1...
[33]
S. Koussouris, Υ. Charalabidis, L. Kipenis, O. Stavri, D. Askounis, Implementation and Evaluation of eParticipation Systems in Western Balkan National News Agencies: The user perspective, Journal of Balkan and Near Eastern Studies, 2010, Taylor & Francis Group, indexed in SCI-E
[34]
Υ. Charalabidis, F. Lampathaki, A. Kavalaki, D. Askounis, A Review of Electronic Government Interoperability Frameworks, International Journal of Electronic Governance, IJEG, Vol. 3, No. 2, pp. 189-221, 2010, Inderscience Publishers
E. Loukis, A. Xenakis, Υ. Charalabidis, An Evaluation Framework For E-Participation In Parliaments, International Journal of Electronic Governance, Vol. 3, No. 1, pp. 25-45, 2010, Inderscience
 

Abstract
E-participation is a relatively new approach, so it is necessary to evaluate it carefully so that we can improve e-participation practice. This paper describes a framework that has been developed for evaluating a number of e-participation pilots in the legislation development processes of parliaments. The framework is based on the objectives and basic characteristics of ‘traditional’ public participation, e-participation and the legislation development processes, as well as the existing frameworks for the evaluation of Information Systems (ISs), e-participation and traditional public participation. It includes three perspectives: process, system and outcomes evaluation; each of them is analysed into a number of evaluation criteria.

[36]
D. Sarandis, Υ. Charalabidis, D. Askounis, A Critical Assessment of Project Management Methods with respect to Electronic Government Implementation Challenges, Systemic Practice and Action Research Journal (SPAR), Vol. 23, No. 4, pp. 301-321, 2010, , indexed in SCI-E
[37]
S. Koussouris, G. Gionis, F. Lampathaki, Υ. Charalabidis, D. Askounis, Transforming Traditional Production System Transactions to Interoperable eBusiness-aware Systems with the use of Generic Process Models, International Journal of Production Research, Vol. 48, No. 19, pp. 5711 - 5727, 2010, Taylor & Francis, , indexed in SCI-E
[38]
D. Sarandis, Υ. Charalabidis, D. Askounis, A Goal-Driven Management Approach based on Knowledge Exploitation for E-Government Projects, International Journal of Electronic Government Research, Vol. 6, No. 3, pp. 14-30, 2010, IGI Global,
[39]
Υ. Charalabidis, M. Janssen, W. Weerakody, E-Government Integration and Interoperability Services, International Journal of E-Services and Mobile Applications (IJESMA), Vol. 2, No. 4, 2010, IGI Global,
[40]
Υ. Charalabidis, F. Lampathaki, D. Askounis, Investigating the Landscape in National Interoperability Frameworks, International Journal of E-Services and Mobile Applications (IJESMA), Vol. 2, No. 4, pp. 28-41, 2010, IGI Global,
[41]
Υ. Charalabidis, F. Lampathaki, D. Askounis, Electronic Government Interoperability: State Of Play In Europe And The Mediterranean Region, European Journal of Information Systems, EJIS, 2010, Palgrave MacMillan , (to_appear), , indexed in SCI-E
[42]
D. Sarandis, D. Askounis, Υ. Charalabidis, A Goal?Driven Management Framework for Electronic Government Transformation Projects, Government Information Quarterly GIQ, 2009, Elsevier Publications, (to_appear),
[43]
Υ. Charalabidis, S. Koussouris, G. Gionis, D. Askounis, Promoting Electronic Participation Systems in the Balkans: The case of National Press Agencies, International Journal of Electronic Governance, IJEG, Vol. 2, No. 2, pp. 272-276, 2009, Inderscience Publishers
[44]
F. Lampathaki, S. Mouzakitis, Υ. Charalabidis, D. Askounis, G. Gionis, Business to Business Interoperability: A Current Review of XML Data Integration Standards, Journal of Computer Standards & Interfaces (CS&I), No. 31, pp. 1045 - 1055, 2009, Elsevier Publications, indexed in SCI-E
[45]
Υ. Charalabidis, S. Koussouris, D. Askounis, Building eGovernment Service Portals for Local Administrations: A Cookbook Approach, International Journal of Innovation and Regional Development, IJIRD, Vol. 1, No. 3, pp. 255 – 275, 2009, Inderscience Publishers,
[46]
E. Ergazakis, K. Ergazakis, A. Flamos, Υ. Charalabidis, Knowledge Management in SMEs: A Research Agenda, International Journal of Management and Decision Making, IJMDM, Vol. 10, No. 1, pp. 91-110, 2009, Inderscience Publishers
[47]
E. Ergazakis, K. Ergazakis, K. Metaxiotis, Υ. Charalabidis, Rethinking the development of successful knowledge cities: an advanced framework, Journal of Knowledge Management (JKM), Vol. 13, No. 5, pp. 214-227, 2009, Emerald Group Publishing, , indexed in SCI-E
[48]
Υ. Charalabidis, M. Wimmer, G. Misuraca, e-Metamorphosis’ initiative in Lausanne, International Journal of Electronic Governance, IJEG, Vol. 2, No. 1, pp. 89-92, 2009, Inderscience Publishers,
[49]
Υ. Charalabidis, F. Lampathaki, D. Askounis, Unified Data Modelling and Document Standardization Using Core Components Technical Specification for Electronic Government Applications, Journal of Theoretical and Applied Electronic Commerce Research, Special Issue on "Electronic Document Interoperability in eBusiness and eGovernment Applications", JTAER, Vol. 3, No. 3, pp. 38-51, 2008,
[50]
T. Janner, F. Lampathaki, V. Hoyer, S. Mouzakitis, Υ. Charalabidis, C. Schroth, A Core Component-based Modelling Approach for Achieving e-Business Semantics Interoperability, Journal of Theoretical and Applied Electronic Research, Vol. 3, No. 3, 2008
[51]
D. Sarandis, Υ. Charalabidis, J. Psarras, Towards Standardising Interoperability Levels for Information Systems of Public Administrations, Electronic Journal for e-Commerce Tools and Applications (eJETA), 2008, U.Texas, US
[52]
Υ. Charalabidis, M. Wimmer, G. Misuraca, e-Participation systems and services in converging regions, International Journal of Electronic Governance, IJEG, Vol. 1, No. 2, pp. 361 - 362, 2008, Inderscience Publishers,
[53]
Υ. Charalabidis, M. Wimmer, G. Misuraca, News and Briefs: World e-Parliament Report 2008 – ICTs remain under utilised for e-participation purposes, International Journal of Electronic Governance, IJEG,, Vol. 1, No. 4, pp. 477-481, 2008,
Υ. Charalabidis, H. Panetto, E. Loukis, K. Mertins, Interoperability Approaches for Enterprises and Administrations Worldwide, Electronic Journal for e-Commerce Tools and Applications (eJETA), Vol. 2, No. 3, 2007
 

Abstract
During the last few years, research and practice worldwide have shown that enhancing interoperability among organizations, systems or software applications is a multi-disciplinary issue of critical importance, touching upon processes, data and technical standardization. Fortunately, researchers and practitioners have started to realize the impact of interoperability in achieving true one-stop service provision for citizens and businesses, in fostering collaboration between enterprises or in minimizing the needed investment for maintaining complex systems. Current research results show that there exist common practices to be shared among public sector organisations and private sector enterprises, in attempts related with aligning organisation and processes, tackling semantic and technical shortcomings, building relevant architectures and finally achieving the legal interconnection and co-operation of systems. The identification of such common areas between eBusiness and eGovernment can then lead to a joint exploration, enhance reuse of the real paradigms and real exploitation of results by enterprises and administrations. Also future interoperability research directions, as emerging from relevant strategies and research roadmaps of important stakeholders, and also from relevant research workshops, are outlined. Furthermore, it is argued that interoperability research should be extended towards ‘knowledge interoperability’ as well, and deal with the development of methods and architectures enabling the exchange of knowledge among co-operating organizations.

[55]
Υ. Charalabidis, Software Industry in Greece, InfoComms Journal, 1999,
[56]
S. Mitropoulos, Υ. Charalabidis, V. Assimakopoulos, Two-dimensional colour pattern load analysis: A tool supporting demand-side management, Decision Support Systems, Vol. 13, No. 2, pp. 159-166, 1995, Elsevier Publications, indexed in SCI-E

Επιστημονικά Συνέδρια (Conferences)


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Υ. Charalabidis, E. Loukis, C. Alexopoulos, N. Vogiatzis, D. Kolokotronis, Convergence and Divergence Between Municipalities and Citizens about Smart City Actions’ Priorities, 21st Annual International Conference on Digital Government Research – DG’O 2020, Jun, 2020, Seoulm Korea,
 

Abstract
Most of smart city research focuses on the ‘supply-side’, and only limited research has been conducted about the ‘demand-side’ of smart cities: the smart city actions that are perceived by citizens as having higher usefulness, value and therefore priority; also limited research has been conducted for the comparison between the supply-side and the demand-side of smart cities. This paper contributes to filling these important research gaps. It investigates and compares smart city actions’ priorities of the municipalities with the ones of the citizens, in order to identify points of convergence as well as of divergence. A novel methodology has been constructed for this purpose, which includes as a first step the development of a detailed taxonomy of possible smart city actions, based on previous relevant literature. This taxonomy is then used for collecting assessment data from municipalities as well as from citizens concerning these possible smart city actions. Furthermore, our methodology includes three layers of processing of the above assessment data, which identify: a) the priorities of these two important stakeholders concerning smart city actions; and b) points of convergence as well as points of divergence between them. This methodology has been applied in the context of the Greek local government. Assessment data concerning the importance of the smart city actions of the above taxonomy were collected from 144 Greek municipalities and 500 citizens; their processing has revealed an important divergence between these two important smart city stakeholders.

Υ. Charalabidis, E. Loukis, Z. Lachana, C. Alexopoulos, Future Research Directions on the Science Base and the Evolution of the Digital Governance Domain, International Conference on Information Systems (ICIS) 2019 - Workshop ‘Critical Questions in Public Sector IT: Outlining a Collaborative Research Agenda’, Dec, 2019, Munich, Germany,
 

Abstract
Digital Governance (initially ‘Electronic Government’, and later ‘Electronic Governance’ incorporating also ICT-based innovations and transformation) has emerged as a research and practice domain aiming at the exploitation of information and communication technologies (ICT) in government, in order to support, transform and enhance its activities, both the internal ones, as well as the ‘extrovert’ ones concerning communication with the external environment (dialogue and consultation with citizens and firms, and also transaction with them), in order to increase their effectiveness and efficiency. During the last decades, Digital Governance has been recognized as a well-established domain with a highly ambitious objective, which is quite beneficial for the society and the economy: to study and advance the exploitation of ICT for addressing problems and needs of public sector organizations, and develop novel methods and frameworks for enhancing their internal efficiency, service quality and policy-making effectiveness through the use of ICT. Though substantial progress has been made through government funded as well private sector research in a number of areas of it, yet the lack of a science base of the Digital Governance domain seems to hinder unlocking the real transformative value of ICT in the public sector, as well as the full contribution and creativity potential of all its stakeholders, from researchers to industry and SMEs. Such a scientific background would enable a better documentation, organization, structuring of the existing knowledge in this area, as well as its dissemination through training, and also provide systematic directions for high priority future research, in order to develop a portfolio of systematic solutions to specific problems concerning the exploitation of ICT in government organizations (methods for assessment and identification of problems, as well as methods for providing solutions, which can be applied (possibly with some adaptations) in a wide range of organizational, cultural and legal contexts, as it happens in ‘mature’ sciences, such as the engineering ones).This paper provides some research directions concerning the development of the science base of the Digital Governance domain as well as its evolution, and proposes specific relevant research questions that have to be addressed.

Υ. Charalabidis, E. Loukis, C. Alexopoulos, Z. Lachana, The Three Generations of Electronic Government: From Service Provision to Open Data and to Policy Making, EGOV-CEDEM-EPART 2019 Conference, Sep, 2019, San Benedetto Del Tronto, Italy, Springer Verlag,
 

Abstract
For long time research and practice in the area of Electronic Government (e-government) has been focusing on the use of information and communication technologies (ICT) for improving the efficiency government agencies’ internal operations, as well as transactions with citizens and firms. However, the increased needs and expectations of citizens, and the proliferation of ‘participatory democracy’ ideas, gave rise to a new generation of ICT exploitation by government for increasing and enhancing citizens’ participation. Furthermore, the increasing social problems and challenges that had to be addressed by government through appropriate public policies, such as the increasing inequalities and poverty, the aging society, the environmental degradation, and the rising number of ‘unpredictable’ events, such as the financial and economic crisis, give rise to the development of a new wave of egovernment focusing on policy analytics for supporting the design of effective responses - public policies for these challenges. Therefore, evolutions in the needs of modern societies, in combination with technological evolutions, give rise to evolutions in e-government, and the emergence of new generations of it. This paper aims at the identification and better understanding of the main characteristics of the different e-Government generations, using an analytical framework based on two rounds of literature review. The results of the study provide insights on the main features of the three main e-government generations, regarding their main goals, obstacles, key methods and tools, and reveal the new emerging generation of e-Government 3.0 and its basic characteristics. Furthermore, within the first and to some extent the second e-Government generation there have been substantial advancements, which have created distinct sub-generations of them, revealed and analysed through extensive relevant growth/maturity stages research.

C. Alexopoulos, Z. Lachana, A. Androutsopoulou, V. Diamantopoulou, Υ. Charalabidis, M. Loutsaris, How Machine Learning is changing e-Government, 12th International Conference on Theory and Practice of Electronic Governance (ICEGOV2019), Soumaya Ben Dhaou, Lemuria Carter, and Mark Gregory, (eds), (to_appear), Apr, 2019, Melbourne, Australia, ACM Press, http://www.icegov.org
 

Abstract
Big Data is, clearly, an integral part of modern information societies. A vast amount of data is, daily, produced and it is estimated that, for the years to come, this number will grow dramatically. In order for transforming this hidden provided information into a useful one, the use of advanced technologies, such as Machine Learning is deemed appropriate. Over the last years, Machine Learning has grown a great effort considering the given opportunities its usage provides. Furthermore, Machine Learning is a technology that can handle Big Data classification for statistical or even more complex purposes such as decision making. At the same time the new generation of government, Government 3.0, explores all the new opportunities to tackle any challenge faced by contemporary societies by utilizing new technologies for data driven decision making. Taking into account the opportunities Machine Learning can provide, more and more governments participate in the development of such applications in different governmental domains. But is the Machine Learning only beneficial for public sectors? Although there is a huge number of researches in the literature there is no a comprehensive study towards the analysis of this technology. Our research moves towards this question conducting a comprehensive analysis of the use of Machine Learning from Governments. Through the analysis all benefits and barriers are indicated from the public sectors' perspective pinpointing, also, a number of Machine Learning applications where governments are involved.

Υ. Charalabidis, M. Loutsaris, Shefali Virkar, C. Alexopoulos, Anna-Sophie Novak, Z. Lachana, se Case Scenarios on Legal Text Mining, 12th International Conference on Theory and Practice of Electronic Governance, pp. 364-373, Apr, 2019, Melbourne, VIC, Australia, ACM Press, https://doi.org/10.1145/3326365.332...
 

Abstract
Europe's vision is to establish a well-functioning Digital Single Market, where Europeans are able to move and trade among the EU member states. On the other hand the large amount of information about laws that apply in each EU country has posed significant barriers in this vision. Moreover only legal experts can follow the latest legislation in each country consuming a large amount of business resources in order to follow the current legislation. However, Mass customization tools can help to filter and thereby reduce the flood of legal information and make it easier to be followed from businesses and citizens without legal expertise. The proposed solution is a novel ICT architecture utilising and built upon text mining, advanced processing and semantic analysis of legal information towards the provision of a set of services for citizens, businesses, and administrations of the European Union. In order to provide the most appealing, comprehensive and added value services in the legal domain, this paper presents six use case scenarios based on the opinion of different target groups. Conducting interviews and focus groups, we were able to identify the novel functionalities and services of great importance for the users highlighting and addressing users' daily problems regarding legal information. Generally, interviews with the different target groups reveal that at this point, users prioritise their needs towards more basic services such as search functionalities and correlation with previous laws. Lawyers on the other hand as more competent target group asked for summarisation and reporting services. All target groups where eager on the implementation of this service which as it seems it will directly impact their everyday professional and personal use of legal information.

C. Alexopoulos, Υ. Charalabidis, A. Androutsopoulou, M. Loutsaris, Z. Lachana, Benefits and obstacles of blockchain applications in E-Government, 52nd Hawaii International Conference on System Sciences, Jan, 2019, http://hdl.handle.net/10125/59773
 

Abstract
Nowadays, Blockchain Technologies (BCT) could be characterized as one of the most promising trends. We are currently witnessing a plethora of implementations basically in the economic sector with the creation of cryptocurrencies. The majority of researchers and practitioners argues that many benefits could be derived from the use of this innovative technology with the most significant one being the improved sense of trust to BCT applications. At the same time governments pursue amplified trust from their citizens and BCT is gaining momentum since it addresses this of utmost importance problem based on its unique characteristics. More and more governments realize the advances of this technology and participate in pilot applications in different vertical governmental sectors. Even though there are several implementations in the Government sector, there is no comprehensive study towards the analysis of the major characteristics of these developments. This paper moves towards the fulfilment of this gap conducting a thorough analysis of e-Government pilot applications of BCT in a European level. Furthermore, this study discusses the key benefits and main barriers coming from the application of this technology in different domains with BCT experts.

Z. Lachana, C. Alexopoulos, E. Loukis, Υ. Charalabidis, Identifying the Different Generations of eGovernment – An Analysis Framework, 12th Mediterranean Conference on Information Systems (MCIS 2018), Sep, 2018, Corfu, Greece, AIS,
 

Abstract
For long time research and practice in the area of Electronic Government has been focusing on the use of information and communication technologies (ICT) for improving the efficiency and effectiveness of the internal operations of government agencies, as well as for providing elec-tronic transaction services to citizens and firms. The increased needs and expectations of citi-zens, and the proliferation of ‘participatory democracy’ ideas, result in an increase of their di-rect participation in policy making processes, and the use of ICT seems to be an important fa-cilitator of this. At the same time the multiple social problems and challenges to be addressed through policy-making, such as the increasing inequalities and poverty, the aging society, the environmental degradation, and the rising number of ‘unpredictable’ events, such as the finan-cial and economic crises, necessitate the development of a new generation of eGovernment fo-cusing on the design of effective responses - public policies for these challenges. Therefore evo-lutions in the needs of modern societies, in combination with technological evolutions in the ICTs, give rise to evolutions in e-Government, and the emergence of new generations of it. This paper aims at the identification and better understanding of the main characteristics of the dif-ferent e-government generations, using an analytic framework based on two rounds of literature review. The results of the study provide insights on the main features of the three main e-Government generations, regarding their main goals, obstacles, key methods and tools, placing special emphasis on the new emerging generation of e-Government 3.0 and its basic character-istics.

A. Androutsopoulou, Υ. Charalabidis, E. Loukis, Policy Informatics in the Social Media Era: Analyzing Opinions for Policy Making, EGOV-CEDEM-EPART 2018 Conference, Sep, 2018, Krems, Austria, Springer Verlag
 

Abstract
In order to address the complexity of the modern social problems and needs through effective public policies, government agencies have started experimenting with policy informatics methods, adopting various approaches that increase citi-zens’ and stakeholders’ participation in the public policy formulation processes. Such approaches allow the exploitation of their opinions, which incorporate valu-able perceptions of them, as well as knowledge, proposals and ideas. This paper outlines three advanced methods of social media (SM) exploitation in public poli-cy making processes for citizen-sourcing, which are based on the concepts of ac-tive citizen-sourcing, passive citizen-sourcing and passive expert-sourcing respec-tively, as well as the conclusions from some first applications of them. Based on them a comparison of these methods is conducted, and then a maturity model is developed concerning the use of SM for citizen-sourcing in order to support policy making.

Z. Lachana, M. Loutsaris, C. Alexopoulos, Υ. Charalabidis, “PERI NOMOU” SYSTEM: AUTOMATED CODIFICATION AND INTERRELATION OF LEGAL ELEMENTS BASED ON TEXT MINING, 12th Mediterranean Conference on Information Systems (MCIS 2018), Sep, 2018, Corfu, Greece, AIS
 

Abstract
One of the most promising developments comes with the use of innovative technologies and thus with the availability of novel services. The combination of text mining with legal elements may contribute to the development of many innovative legal information systems. Moreover, in the case of public administrations and governments, the distribution, availability, and access to-wards legal information are essential and urgent. On the other hand, legal data and law texts are a potential open Government data category in order for innovation to be achieved, regarding the development of new, better, and more cost-effective services for citizens. Those data need to be available 24/7 basis and compliant towards a standard. Yet, there exist some severe issues at the moment regarding this access. This, in turn, makes the use of automated crawling and analysis more than difficult. This paper describes the “Peri Nomou” (about law) system: an innovative legal information system for Greek laws utilising text mining techniques to indexing legal documents, identifying correlations and dividing legal documents into their articles. The first version of the system has been evaluated by legal experts and the second version is developed based on the previous evaluation and presented in this paper. The results from the evaluation indicate the significance of the “Peri Nomou” system for the legal experts and allow us to promote the Peri Nomou system to other user groups, such as business, public administration.

M. Loutsaris, A. Androutsopoulou, Υ. Charalabidis, EU-WIDE LEGAL TEXT MINING USING BIG DATA PROCESSING INFRASTRUCTURES, 12th Mediterranean Conference on Information Systems (MCIS 2018), Sep, 2018, Corfu, Greece, AIS
 

Abstract
Governments are responding to the rapid evolution of technologies and the era of Government 3.0 through novel services providing to citizens, businesses, and administrations. In the other hand, society is overwhelmed because of the large amount of legal information in the countries of European Union and there is no system capable of acquiring, storing and processing such large amounts of legal information, at an advanced level in various languages. The current paper presents a proposed novel framework and an ICT architecture for the introduction of a set of services for citizens, businesses, and administrations of the European Union, built upon text mining, advanced processing and semantic analysis of legal information. To achieve this, our proposed framework gain access to big legal data currently produced and published in multiple national or EU public data sources (e.g EUR-Lex, NOMOS), link it and transform it to structured open datasets. By combining data coming from a multiplicity of sources, our framework aims to achieve seamless and inclusive access to legal information across EU and improve the efficacy of decision making in legislative procedures operated by public bodies.

C. Alexopoulos, A. Androutsopoulou, Z. Lachana, M. Loutsaris, Υ. Charalabidis, Blockchain in Government 3.0: A review, EGOV-CeDEM-ePart 2018 Conference, Sep, 2018, Krems, Austria,
 

Abstract
Government 3.0 is characterised by the utilisation of disruptive technologies in conjunction with already established ones towards data-intensive decision and policy making. One of the disruptive technologies that will affect in general e-government applications and services provision and will more specifically frame government 3.0, is BCT. Yet no systematic research is available which compares the benefits of BCT with the barriers to its adoption. This paper conducts a literature, research projects and applications review for the BCT within the respecting area of e-government. The inquiry follows a desk-based methodology for the identification of the primary references and research projects as well as a qualitative discussion with experts of the domain. This study identifies the major benefits and impediments for the application of this technology in the e-government domain. The findings show that a gap exists between the promised benefits and barriers and frame future research directions.

[12]
Υ. Charalabidis, A. Davalas, Z. Lachana, M. Loutsaris, Theofilos Mylonas, George Papazidis, An innovative, mobile-based, multi-merchant, student loyalty system spreads in the Greek Islands: The Aegean Club / Yummy Wallet case, European University Information Systems Organization Conference, Jun, 2018, Paris, France,
V. Diamantopoulou, A. Androutsopoulou, S. Gritzalis, Υ. Charalabidis, An Assessment of Privacy Preservation in Crowdsourcing Approaches: Towards GDPR Compliance, IEEE RCIS 12nd International Conference on Research Challenges in Information Science, B. Le Grand, (ed), pp. 1-9, May, 2018, Nantes, France, IEEE Conference Publishing Services, https://ieeexplore.ieee.org/abstrac...
 

Abstract
The increasing use of Social Media has transformed them into valuable tools, able to provide answers and decision support in public policy formulation. This has resulted in the emergence of new e-participation paradigms, such as crowdsourcing approaches, aiming to drive more constructive interactions between governments and citizens or experts, in order to exploit their knowledge, opinions, and ideas when tackling complex societal problems. However, the continuous exposure of the average users, without or with limited awareness of the dangers of the disclosure of sensitive data, remains a threat to the preservation of their information privacy. The upcoming EU regulation (GDPR) about the protection of personal data is especially well timed, and forces for revision of the processes followed related to the manipulation of personal data within public participation methods. Towards this direction, a thorough examination of three advanced methods of crowdsourcing in public policy-making processes is conducted in the current paper, analysing the data collection and processing methods they encompass. Then, an assessment of their compliance with fundamental privacy requirements is presented. The research contributes to the identification of challenges that crowdsourcing, and in general, e-participation approaches impose with regard to privacy protection. Further research directions include the implementation of techniques that can satisfy the identified requirements.

E. Loukis, Υ. Charalabidis, A. Androutsopoulou, Using Social Media for Government Passive Expert-Sourcing, Hawaii International Conference on System Sciences (HICSS), Jan, 2018, Hawaii, Big Island,
 

Abstract
Social Media have been initially used by government agencies for general public oriented ‘citizen-sourcing’. Though this enabled the collection of useful policy relevant information and knowledge from the general public, and provided valuable insights into their relevant perceptions, it would be quite useful if this could be combined with the collection of policy relevant information and knowledge from experts as well (‘expert-sourcing’). In this paper, a passive expert-sourcing method based on social media, which has been developed in a European research project, is evaluated from a fundamental perspective: the wicked problems theory perspective. In particular, we investigate to what extent this method enables government agencies to collect high quality information concerning the main elements of important social problems to be addressed through public policies: particular issues posed, alternative interventions/ actions, and advantages/disadvantages of them; as well as to what extent there is consensus about these elements among different stakeholder groups. For this purpose data are collected through interviews with Members of the Greek Parliament. From their analysis interesting conclusions have been drawn about the strengths and weaknesses of this expert-sourcing method, as well as required impro-vements of it.

A. Androutsopoulou, N. Karacapilidis, E. Loukis, Υ. Charalabidis, Towards an Integrated and Inclusive Platform for Open Innovation in the Public Sector , 7th International Conference on eDemocracy, Dec, 2017, Athens, Greece, Springer Verlag
 

Abstract
The growing adoption of the open innovation paradigm in the public sector poses a set of research challenges related to the particularities of the domain and the technologies required to manage the associated knowledge flows among diverse types of stakeholders. This paper aims to shed light on how the proper combina-tion of existing ICT tools can support and advance the implementation of open innovation practices in the public sector. Towards this aim, it first presents a non-exhaustive taxonomy of these tools, which is also associated with the open inno-vation phase they primarily support. Paying particular attention to the issues of collaboration support and sophisticated data collection and analysis, the paper al-so proposes an open, inclusive and sustainable web-based platform that builds on the synergy between human and machine intelligence to address the important challenges of public sector open innovation. An indicative application scenario, concerning a contemporary societal problem, showcases the potential of the pro-posed solution.

C. Alexopoulos, V. Diamantopoulou, Υ. Charalabidis, The Evolutionary track of OGD portals: A Maturity Model, Proceedings of the IFIP EGOV-EPART 2017 Conference, Sep, 2017, St Petersburg, Russia, Springer LNCS
 

Abstract
Since its inception, open government data (OGD) as a free re-useable object has attracted the interest of researchers and practitioners, civil servants, citizens and businesses for different reasons in each target group. This study was designed to aggregate the research outcomes and developments through the recent years towards illustrating the evolutionary path of OGD portals, by presenting an analysis of their characteristics in terms of a maturity model. A four-step methodology has been followed in order to analyse the literature and construct the maturity model. The results point out the two greater dimensions of OGD portals, naming traditional and advanced evolving within three generations. The developed maturity model will guide policy makers by firstly identify the current level of their organisation and secondly design an efficient implementation to the required state.

Υ. Charalabidis, E. Loukis, A. Androutsopoulou, Evaluating a Passive Expert-Sourcing Method for Policy Making from Innovation Diffusion Theory Perspective, 23rd Americas Conference on Information Systems (AMCIS 2017), Aug, 2017, Boston, USA, AIS
 

Abstract
The first attempts of government agencies to apply crowdsourcing ideas aimed at the collection of policy-related information, knowledge and ideas from the general public (‘citizen-sourcing’), concerning various social problems and needs, in order to support the development of effective public policies for addressing them. However, it was soon realized that, due to the high complexity of modern social problems and needs, it would be quite beneficial if the above could be complemented by the collection of relevant information, knowledge and ideas from experts; this leads to the gradual emergence of ‘expert-sourcing’, as an important foundation of public policy making. Such practices constitute important innovations in the policy development processes, so it is necessary to analyze them from this perspective; the most fundamental question to be investigated is to what extent these innovative expert-sourcing practices have the fundamental preconditions for a wide diffusion. Our paper makes a contribution in this direction, evaluating an ICT-based passive expert-sourcing method for supporting policy making from this perspective, using as theoretical foundation the Diffusion of Innovation Theory.

L. Spiliotopoulou, D. Damopoulos, Υ. Charalabidis, M. Maragoudakis, S. Gritzalis, Europe in the shadow of financial crisis: Policy Making via Stance Classification, HICSS-50 2017 Hawaii International Conference on System Sciences, T. Bui, R. Sprague, (eds), pp. 2835–2844, Jan, 2017, Hawaii, USA, IEEE CPS Conference Publishing Services, http://www.hicss.org/
 

Abstract
Since 2009, the European Union (EU) is phasing a multi–year financial crisis affecting the stability of its involved countries. Our goal is to gain useful insights on the societal impact of such a strong political issue through the exploitation of topic modeling and stance classification techniques. \ \ To perform this, we unravel public’s stance towards this event and empower citizens’ participation in the decision making process, taking policy’s life cycle as a baseline. The paper introduces and evaluates a bilingual stance classification architecture, enabling a deeper understanding of how citizens’ sentiment polarity changes based on the critical political decisions taken among European countries. \ \ Through three novel empirical studies, we aim to explore and answer whether stance classification can be used to: i) determine citizens’ sentiment polarity for a series of political events by observing the diversity of opinion among European citizens, ii) predict political decisions outcome made by citizens such as a referendum call, ii) examine whether citizens’ sentiments agree with governmental decisions during each stage of a policy life cycle.

A. Androutsopoulou, F. Mureddu, E. Loukis, Υ. Charalabidis, Passive Expert-Sourcing for Policy Making in the European Union, IFIP WG 8.5 International Conference, ePart 2016, (eds), pp. 162-175, Sep, 2016, Guimarães, Portugal, Springer International Publishing (Best Paper Award)
 

Abstract
The public sector gradually starts exploiting the crowdsourcing ideas initially developed in the private sector. However, there is much less knowledge on efficient and effective methods and practices for public sector citizen-sourcing in comparison with private sector crowd-sourcing, so extensive research is required in this area. This paper contributes to filling this research gap, by presenting an ICT-based method for ‘pssive expert-sourcing’, with the latter term denoting the collection of policy relevant information, knowledge and ideas from experts, which aims at supporting policy making by the European Union (EU) by leveraging its large policy community. Its theoretical foundation is previous theoretical work on the relationships between democracy and technocracy, and also on policy networks. The main technological pillars of the proposed method are: EU policy experts’ profiling and reputation management, relevant documents’ opinion mining and relevance rating, and finally advanced visualized presentation of them. Finally, a first evaluation of the proposed method is presented, leading to encouraging results.

Υ. Charalabidis, C. Alexopoulos, V. Diamantopoulou, A. Androutsopoulou, An open data and open services repository for supporting citizen-driven application development for governance, Proceedings of the HICSS-49 2016 Hawaii International Conference on System Sciences, pp. 2596--2604, Jan, 2016, Koloa, Hawaii, USA, IEEE CPS Conference Publishing Services, http://ieeexplore.ieee.org/document...
 

Abstract
Open data portals have been a primary source for publishing datasets from various sectors of administration, all over the world. However, making open data available does not necessarily lead to better utilisation from citizens and businesses. Our paper presents a new framework and a prototype system for supporting open application development by citizen communities, through gathering and making available open data and open web services sources from governmental actors, combined with an application development environment, training material and application examples.

A. Androutsopoulou, Υ. Charalabidis, E. Loukis, Using Social Media Monitoring for Public Policy Making – An Evaluation, 9th Mediterranean Conference on Information Systems (MCIS 2015), Oct, 2015, Samos
 

Abstract
Social media monitoring has been initially adopted by private sector firms in order to collect opinions, complaints and questions concerning their products and services, to be used for mak-ing appropriate changes and improvements of them and also for designing communication strategies. Recently government agencies have started adopting SMM, as a form of ‘passive citi-zen-sourcing’, in order to collect useful information from citizens concerning their needs, prob-lems, opinions and suggestions, to be used for public policy formulation. It is therefore im-portant to evaluate these first initiatives, so that the potential of SMM with respect to public pol-icy making can be exploited, and at the same time appropriate adaptations and improvements of relevant ICT platforms and practices can be made, in order to reach higher levels of maturity. This paper makes a two-fold contribution in this direction. Initially it develops a framework for evaluating the use of SMM for supporting policy making, initially from the ‘classical’ ease of use perspective, and then from a public policy perspective, based on the wicked social problems theory. This framework is then used for the evaluation of three pilot applications of a novel method of SMM by government agencies and other policy stakeholders, which has been devel-oped as part of a European research project.

Υ. Charalabidis, M. Maragoudakis, E. Loukis, Opinion Mining and Sentiment Analysis in Policy Formulation Initiatives: The EU-Community Approach, IFIP eParticipation Conference EPART2015, Sep, 2015, Thessaloniki,
 

Abstract
In the last decade there is extensive and continuously growing creation of political content in the Internet, and especially in the Web 2.0 social media, which can be quite useful for government agencies in order to understand the needs and problems of societies and formulate effective public policies for addressing them. So a variety of ICT-based methods have been developed for the exploitation of this political content by governments (‘citizensourcing’), initially simpler and later more sophisticated ones. These ICT-based methods are increasingly based on the use of opinion mining (OM) and sentiment analysis (SA) techniques, in order to process the extensive political content collected from numerous sources. This paper describes a novel approach to OM and SA use, created as part of an advanced ICT-based method of exploiting political content created in the Internet, and especially in social media, by experts (‘expertsourcing’), aiming to leverage the extensive policy community of the European Union, which is developed in the European EU-Community project. Furthermore, some first experimental results of it are presented.

E. Loukis, Υ. Charalabidis, A. Androutsopoulou, Evaluating a Passive Social Media Citizensourcing Innovation, 14th IFIP Electronic Government (EGOV) and 7th Electronic Participation (ePart) Conference 2015, Sep, 2015, Thessaloniki, Springer-Verlag New York, Inc.
 

Abstract
Governments initially used social media mainly in order to disseminate information to the public about their activities, services, policies and plans. Then they started using social media also in order to collect from citizens useful information, knowledge, opinions and ideas concerning the problems and needs of modern societies and more recently in order to apply crowdsourcing ideas in the public sector context and promote ‘citizensourcing’. In this direction governments first used their own accounts in various social media, in which they provide information about specific problems and policies, and solicit citizens’ feedback on them (active citizensourcing). Recently, they attempt to take advantage of the extensive public policy related content developed beyond their own social media accounts, in various political forums, blogs, news websites, and SM accounts, by the citizens, without any stimulation (passive citizensourcing). These constitute significant innovations in policy formulation– citizens communication processes and practices of government. Therefore it is important to evaluate them from various perspectives, in order to learn from them as much as possible, identify and address their weaknesses, make the required improvements, and in general achieve higher levels of effectiveness and maturity of these highly innovative practices. This paper makes a two-fold contribution in this direction: initially it develops a framework for evaluating such citizensourcing innovations based on the passive social media monitoring; and then it uses this framework for the evaluation of three pilot applications of a novel method of government passive citizensourcing through social media monitoring, which has been developed as part of an international research project.

A. Ramfos, A. Kiousi, M. Kokkonidis, C . Leclercq, D. Mekkaoui, M. Sattonnay, M. Maragoudakis, A. Androutsopoulou, Υ. Charalabidis, J. Kohlhammer, The "EU Community Project" - Coupling the Power of Data with Community Expertise, 14th IFIP Electronic Government (EGOV) and 7th Electronic Participation (ePart) Conference 2015, Workshop on Enabling Effective Policy Making 2015 (EEPM), Aug, 2015, Thessaloniki, Greece
 

Abstract
The EU Community project seeks to promote, facilitate, and ultimately exploit the synergy of a cutting-edge intelligent collaboration platform with a community of institutional actors, stakeholders, scientists, consultants, media analysts and other individuals that can make valuable contributions to EU policy debates. Its ultimate goal is to effectuate a transformation in the modus operandi of EU politics and move closer to achieving the illusive goals of improved transparency, efficiency, awareness and engagement, ultimately leading to better policies for a better European Union.

[25]
Υ. Charalabidis, Janssen M., Krcmar H., Introduction to the Big, Open, and Linked Data (BOLD), Analytics, and Interoperability Infrastructures in Government Minitrack, 48th Hawaii International Conference onSystem Sciences (HICSS), Dec, 2015, US,
Υ. Charalabidis, M. Maragoudakis, E. Loukis, Opinion Mining and Sentiment Analysis in Policy Formulation Initiatives: The EU Community Approach, 14th IFIP Electronic Government (EGOV) and 7th Electronic Participation (ePart) Conference 2015, Dec, 2015, Thessaloniki,
 

Abstract
In the last decade there is extensive and continuously growing creation of political content in the Internet, and especially in the Web 2.0 social media, which can be quite useful for government agencies in order to understand the needs and problems of societies and formulate effective public policies for addressing them. So a variety of ICT-based methods have been developed for the exploitation of this political content by governments (‘citizensourcing’), initially simpler and later more sophisticated ones. These ICT-based methods are increasingly based on the use of opinion mining (OM) and sentiment analysis (SA) techniques, in order to process the extensive political content collected from numerous sources. This paper describes a novel approach to OM and SA use, created as part of an advanced ICT-based method of exploiting political content created in the Internet, and especially in social media, by experts (‘expertsourcing’), aiming to leverage the extensive policy community of the European Union, which is developed in the European EU-Community project. Furthermore, some first experimental results of it are presented.

Υ. Charalabidis, E. Loukis, Y. Koulizakis, Social Media in Policy Making: the EU Community project approach, International Conference for E-Democacy and Open Government - CeDEM-Asia-2014 , Dec, 2014, Hong Kong,
 

Abstract
Policy networks are highly important for the formulation and implementation of public policies, so it is quite valuable to exploit modern ICT in order to support them. This paper presents a novel method of supporting the large policy network of the European Union (EU), which consists of numerous actors geographically dispersed all over Europe, through advanced social media exploitation, in order to improve the quantity and quality of their interaction, and increase efficiency and effectiveness. Based on a series of workshops, in which a large number of individuals involved in EU policy network participated, initially its structure has been analyzed, and then the proposed method has been formulated. Furthermore, the architecture of the ICT infrastructure required for the application of this method has been designed. The main pillars of the proposed method (corresponding also to the main modules of its ICT infrastructure) are: profiling of important EU policy actors’ and reputation management, relevant documents’ storage and relevance rating, and finally advanced visualized presentation of them.

V. Diamantopoulou, E. Loukis, Υ. Charalabidis, Is Information Systems Interoperability an Innovation Driver? An Empirical Investigation, Proceedings of the EMCIS 2014 European, Mediterranean, and Middle Eastern Conference on Information Systems, Oct, 2014, Doha, Qatar, EMCIS
 

Abstract
Most of the research that has been conducted on the business value of information systems (IS) interoperability focuses mainly on the efficiency related benefits it can generate, but deals much less with its potential to drive innovations in firms’ products/services and processes. Our study contributes to filling this research gap by empirically investigating the effect of interoperability of firm’s IS (meant as compliance with various types of relevant standards) on firm’s innovation performance. It is based on a large dataset from 14.065 European firms (from 25 countries and 10 sectors), which has been collected through the e-Business W@tch Survey of the European Commission, and is used for estimating product/service and process innovation models. It has been concluded that IS interoperability has strong positive effects both on product/service and process innovation, which are weaker than the corresponding effects of the degree of development of firms’ IS, but stronger than the effects of the degree of functional development of firm’s e-Sales IS; also they are stronger than the corresponding effects of R&D and competition (regarded as important innovation drivers according to previous literature). Finally, a comparison among different types of IS interoperability standards shows that their positive effects on firms’ innovation activity differ, with the industry-specific and the XML-horizontal standards having stronger effects of similar magnitudes, while the proprietary standards have weaker ones.

E. Loukis, Υ. Charalabidis, A. Androutsopoulou, A Study of Multiple Social Media Use in the European Parliament from an Innovation Perspective, 18th Panhellenic Conference on Informatics with international participation (PCI 2014), Oct, 2014, Athens, Greece
 

Abstract
Government agencieshave started usingthe social media for increasing communication with citizens, and involvement of themin public policy making processes. However, most of the research in this area has technological orientation, but limited research on the use of social media in government from management and political sciences’ perspectives has been conducted. This paper contributes to filling this gap, presenting a study of an advanced form ofcentrally managed combined use of multiple social media in the European Parliament from an innovationperspective. Our main theoretical foundation has beenRogers’Diffusion of Innovation (DOI) theory. It has been concluded that the above approach, viewed as an innovation, has to a good extent the fundamental preconditions for a wide diffusion proposed by DOI theory: relative advantage (though some possible ‘relative disadvantages’ have been identified as well), low complexity (though some considerable initial effort is required), compatibility with existing values and practices(at least to some extent), trialability and observability. Furthermore, recommendations have been provided for improving the diffusion potential of the above innovation, through interventions in the above attributes.

Υ. Charalabidis, E. Loukis, Y. Koulizakis, Mekkaoui, A. Ramfos, Leveraging European Union Policy Community through Advanced Exploitation of Social Media, IFIP Sixth International Conference on e-Participation - ePart 2014, Sep, 2014, Dublin, Ireland,
 

Abstract
The first generations of social media exploitation by government were oriented towards the general public. Evaluations of them have shown that they can provide some insights into the perceptions of the general public, however in order to achieve the required higher levels of quality, depth and elaboration it is necessary to target specific communities having strong interest and good knowledge on the particular topic under discussion. The research presented in this paper makes a contribution in this direction. It develops a novel approach to social media exploitation by the European Union (EU), which aims at leveraging its policy community, which consists of a big network of individuals/ policy stakeholders having various policy related roles and capacities, geographically dispersed all over Europe. Its theoretical foundation is policy networks theory. Based on a series of workshops, in which a large number of such individuals participated, the structure of the EU policy community is initially analysed, then the proposed approach is formulated and elaborated, and finally the fuctional architecture of an ICT platform for supporting it is designed. Theirb main pillars are: important policy stakeholders’ profiles and reputation management, relevant documents’ repository and relevance rating, and finally advanced visualized presentation of them.

C. Alexopoulos, A. Zuiderwijk, Υ. Charalabidis, E. Loukis, M. Janssen, Designing a Second Generation of Open Data Platforms: Integrating Open Data and Social Media, IFIP Sixth International Conference on e-Participation - ePart 2014, Sep, 2014, Dublin, Ireland
 

Abstract
Two important trends in government emerging in the recent years have been on one hand the exploitation of the Web 2.0 social media supporting a more extensive interaction and collaboration, and on the other hand the opening of government data to the citizens through the Internet in order to be used for scientific, commercial and political purposes. However, there has been limited attempt of integrating them. Using a design science approach a second generation of open government data (OGD) platforms is developed, which offer to the users both the „classical‟ first generation functionalities, and also a comprehensive set of additional Web 2.0 features. The latter enables social and collaboration, which enable users to generate value from ODG. In this way users become „prosumers‟, both producing and consumingdata. Capabilities forperforming various types of processing,information and knowledge exchange, and collaboration were found to be useful and valuable in a user test.

E. Loukis, Υ. Charalabidis, A. Androutsopoulou, An Analysis of Multiple Social Media Consultations in the European Parliament from a Public Policy Perspective, Twenty Second European Conference on Information Systems - ECIS 2014, Jun, 2014, Tel Aviv, Israel
 

Abstract
Government institutions of various levels have started experimenting with the use of social media for increasing citizens‟ involvement in their public policy making processes. It is necessary to evaluate systematically these initiatives from various perspectives, in order to develop new knowledge in this recently emerged area, concerning methods of social media exploitation in government, the value they can generate, and also the challenges they pose and their limitations. This paper contributes in this direction, by analysing three centrally managed multiple social media consulations conducted by Members of the European Parliament, from a public policy perspective, based on the wicked problems theory. It has been concluded that the above method of social media exploitation has a good potential for disseminating highly informative multimedia content on a policy under formulation to a much wider audience than the usual participants in the „traditional‟ European Parliament consultations, and also involving and stimulating them to think about the policy, leading to the collection of useful relevant ideas, knowledge and opinions, in a cost efficient manner. However, in order to go into more discussion depth it will be necessary to conduct further consultations, more focused on particular sub-topics and participants. Furthermore,their outcomes should be combined and integrated with the ones of the „traditional‟ consultations and experts‟ studies. Finally, a critical success factor is to build wide, knowledgeable, diverse and pluralistic communities for these social media consultations, including various social actors with strong interest and good knowledge of the particular problem, and extending beyond the networks of the initiator.

Υ. Charalabidis, E. Loukis, C. Alexopoulos, Evaluating Second Generation Open Government Data e-Infrastructures Using Value Models, 47th Hawaii International Conference on System Sciences (HICSS), Jan, 2014, Big Island, Hawaii
 

Abstract
Recently, a second generation of advanced open government data (OGD) infrastructures has emerged, influenced by the principles of the Web 2.0 paradigm, and oriented towards the elimination of the clear distinction between providers and consumers of such data, and the support of data ‘pro-sumers’. This paper presents and validates a methodology for evaluating these advanced second generation of ODG infrastructures, which is based on the estimation of value models of them from users’ ratings. This value model includes assessments of the various types of value generated by such an infrastructure, and also of the relations among them as well. This enables a deeper understanding of the whole value generation mechanism and a rational definition of improvement priorities.The proposed methodology has been used for the evaluation of an advanced second generation ODG e-Infrastructure developed in the European project ENGAGE.

Υ. Charalabidis, E. Loukis, L. Spiliotopoulou, V. Diamantopoulou, A Framework for Utilizing Web 2.0 Social Media for Participative Governance, Proceedings of the EMCIS 2013 European, Mediterranean, and Middle Eastern Conference on Information Systems, A. Ghoneim, M. Kamal , (eds), Oct, 2013, Windsor, UK, EMCIS
 

Abstract
The Web 2.0 social media have been initially exploited by private sector firms, in order to support mainly their marketing and customer relations functions, and there has been considerable research for developing frameworks and practices for the effective utilization of these new communication media in the private sector. Government started exploiting the high capabilities and popularity of the social media much later, so there has been much less research concerning their effective utilization by government agencies. This paper contributes to filling this research gap, presenting a novel framework for the effective utilization of the Web 2.0 social media by government agencies for promoting participative governance and applying crowdsourcing ideas. It is based on the centralised automated publishing of content and micro-applications to multiple Web 2.0 social media, and then collection of citizens’ interactions (e.g. comments, ratings) with them, based on central platform that uses efficiently the application programming interfaces (APIs) of these social media. Finally, citizens’ interactions are processed in this central platform using a variety of techniques (web analytics, opinion mining, simulation modelling) in order to provide finally useful analytics that offer substantial support to government decision and policy makers. Furthermore, an application and an evaluation model for the proposed framework are described, as well as an extension of it that combines active/moderated and passive/non-moderated crowdsourcing.

E. Loukis, Υ. Charalabidis, V. Diamantopoulou, The Effects of Information Systems Interoperability on Business Performance, Proceedings of the EMCIS 2013 European, Mediterranean, and Middle Eastern Conference on Information Systems, A. Ghoneim, M. Kamal , (eds), Oct, 2013, Windsor, UK, EMCIS
 

Abstract
Extensive investments are made for the development of various types of information systems (IS) interoperability technologies, and also for their implementation at firm level. This necessitates the systematic study of the business value that IS interoperability technologies generate. However, quite limited empirical research has been conducted on this. Our study contributes to filling this research gap by presenting an empirical study of the effect of the adoption of three types of IS interoperability standards (industry-specific, XML-horizontal and proprietary ones) on the business benefits firms gain from their information and communication technologies (ICT) infrastructures. It is based on a large dataset from 14.065 European firms (from 25 countries and 10 sectors) collected through the e-Business W@tch Survey of the European Commission. For all these three types of IS interoperability standards it has been concluded that their adoption for establishing IS interoperability with cooperating firms (suppliers, business partners, customers) increases the business benefits gained from firm’s ICT infrastructure, both the cost reduction and the sales growth related ones. A comparison among these three types of IS interoperability standards shows that their positive effects on the ICT business benefits differ, with the industry-specific standards having the strongest effects, which are of similar magnitude with the ones of the degree of development of firm’s internal IS (widely recognized as the main determinants of these benefits). Furthermore, we have found that the adoption of industry-specific standards is particularly important for realizing sales growth related benefits from firm’s ICT infrastructure.

E. Loukis, Υ. Charalabidis, C. Alexopoulos, A Methodology for Determining the Value Generation Mechanism and the Improvement Priorities of Open Government Data Systems, 2nd International Symposium and 24th National Conference on Operational Research, Sep, 2013, National Technical University of Athens, Greece
 

Abstract
Many government agencies worldwide have started making considerable investments for developing information systems that enable opening important data they possess to the society, in order to be used for scientific, commercial and political purposes. In order to rationalise and support future decisions concerning the development, upgrade, improvement and management of this new type of information systems it is important to understand better what value they create and how, and at the same time to identify the main improvements they require. This paper contributes in this direction presenting a methodology for determining the value generation mechanism of open government data (OGD) systems and also priorities for their improvement. It is based on the estimation of a ‘value model’ of the OGD system under evaluation from users’ ratings. It consists of several value dimensions and their corresponding value measures, organized in three ‘value layers’, and also the relations among them. These three value layers concern value related to the efficiency of the OGD (= quality of the various capabilities it provides to the users), its effectiveness (= degree of supporting users for achieving their objectives) and also users’ future behavior intentions respectively. The proposed methodology has been applied successfully to an advanced OGD system developed as part of the European project ENGAGE (‘An Infrastructure for Open, Linked Governmental Data Provision towards Research Communities and Citizens’), providing to interesting insights and improvement priorities. This first application provides evidence that our methodology can be a useful decision support tool for important ODG systems development, upgrade, improvement and management decisions.

E. Ferro, E. Loukis, Υ. Charalabidis, M. Osella, Analyzing the Centralised Use of Multiple Social Media by Government from Innovations Diffusion Theory Perspective, IFIP Fifth International Conference on e-Participation - ePart 2013, Sep, 2013, Koblenz, Germany
 

Abstract
Governments have started increasingly using web 2.0 social media as a new channel of interaction with citizens in various phases of public policies lifecycle. In this direction they have started moving from simpler forms of expoitation of these strong bi-directional communication channels to more complex and sophisticated ones. These attempts constitute important innovations for government agencies, so it is necessary to analyse them from this perspective as well. This paper analyzes an advanced form of centralised use of multiple social media by government agencies from this perspective, using the well established Diffusion of Innovation Theory of Rogers. It is based on a pilot application of the above approach for conducting a consultation campaign concerning the large scale application of a telemedicine program of the Piedmont Regional Government, Italy. It has been concluded that this approach has the fundamental preconditions for a wide diffusion (relative advantage, compatibility with existing values and processes, reasonable complexity, trialability and observability), at least in government organizations having a tradition of bi-directional communication with citizens in all phases of policy making, and also some experience in using social media for this purpose.

Υ. Charalabidis, V. Karkaletsis, A. Triantafillou, A. Androutsopoulou, E. Loukis, Requirements and Architecture of a Passive Crowdsourcing Environment, IFIP Fifth International Conference on e-Participation - ePart 2013, Sep, 2013, Koblenz, Germany
 

Abstract
While the first generation of e-participation has been based on official e-participation spaces owned and operated by government, the second one is oriented towards exploiting the highly popular web 2.0 social media for performing ‘crowd-sourcing’ of policy-related knowledge, opinions and ideas from citizens, through posting relevant policy-related content to some social media and then retrieving and processing citizens’ interactions with it. Recently, the idea of a third generation of e-participation has been proposed, which is based on a more ‘passive’ form of crowd-sourcing in social media, through automated passive search by government agencies for content on a public policy under discussion, that has been created in a large number of predefined relevant web 2.0 sources (e.g. political blogs, news websites, facebookand twitter accounts) by citizens freely, without any direct stimulation by government, retrieval and sophisticated processing of this content. In this paper we analyze and elaborate this idea, based on cooperation with potential users experienced in the design of public policies, through a combination of quantitative and qualitative techniques. Initially, the main roles required for the practical application of this concept are identified, and then the functional requirements of each of them are determined. Finally, based on these functional requirements the architecture of a central platform supporting the application of this concept is designed.

E. Ferro, E. Loukis, Υ. Charalabidis, M. Osella, Evaluating Complex Forms of Social Media Use in Government, 19th Americas Conference on Information Systems - AMCIS 2013, Aug, 2013, Chicago, Illinois, USA
 

Abstract
Government agencies gradually start moving from simpler to more advanced and sophisticated forms of social media use, which are characterized by higher technological and political complexity. It is quite important to evaluate systematically these efforts based on sound theoretical foundations. In this direction this paper outlines and evaluates an advanced form of automated and centrally managed combined use of multiple social media by government agencies for promoting participative public policy making. For this purpose an evaluation framework has been developed, which includes both technological evaluation based on the software platforms and ecosystems theory, and political evaluation based on wicked problems theory, and focuses on the fundamental complexities and challenges of these advanced forms of social media exploitation. It has been used for the evaluation of a pilot application of the above approach for conducting a consultation campaign concerning the large scale application of a telemedicine program in Piedmont, Italy, revealing both its important potential and strengths, but also at the same time some notable problems and weaknesses as well.

[40]
M. Janssen, Υ. Charalabidis, H. Krcmar , Introduction to Cloud Infrastructures and Interoperability Minitrack, 46th Hawaiian International Conference on System Sciences (HICSS 2013), R. H. Sprague, Jr., (ed), pp. 1641-1641, Jan, 2013, Maui, Hawaii, USA,
E. Loukis, Υ. Charalabidis, Efficiency and Innovation Oriented Business Value of Interoperability - An Empirical Investigation, Hawaii International Conference on System Sciences (HICSS) 2013, Jan, 2013, Maui, Hawaii
 

Abstract
The establishment of interoperability of enterprise IS with the ones of trading partners (e.g. customers, suppliers, business allies) is regarded, based on a variety of theoretical arguments, as an important source of business value associated with efficiency gains and innovation. However, there is a lack of empirical investigation of this business value. This paper presents an empirical study of the effect of adopting two types of IS interoperability standards for exchanging electronic data with trading partners, the industry-specific and the proprietary ones, on the benefits firms obtain from their ICT infrastructures, and finally on their business performance. Furthermore, it examines what part of these effects is through increasing effectiveness of existing business process for producing existing products and services, and what part of them is through driving innovation. It is concluded that the adoption of both these types of IS interoperability standards for exchanging electronic data with trading partners has positive effect on the benefits gained from ICT infrastructures, with the effect of the industry-specific standards being much higher than the effect of the proprietary ones. Also, it has been found that a large part of these effects (46% for the industry-specific standards and 62% for the proprietary ones) is through driving innovation.

C. Alexopoulos, E. Loukis, Υ. Charalabidis, An Evaluation Framework for Traditional and Advanced Open Public Data e-Infrastructures, Proceedings of the ECEG Conference, pp. 9, Dec, 2013
 

Abstract
Considerable investments are made to develop numerous e-infrastructures for the reuse of open government data for scientific, commercial and political purposes. This necessitates a deeper understanding and assessment of the value these infrastructures generate. For this purpose, our paper presents a framework for evaluating open government data infrastructures, both ‘traditional’ ones following the web 1.0 paradigm and also advanced ones influenced by the web 2.0 paradigm. The evaluation framework is based on findings of previous research on the evaluation of public projects, information systems and e-services, and also on technology acceptance and IS success models. The proposed evaluation framework consists of an evaluation model with measurable evaluation dimensions and criteria, as well as a comprehensive evaluation procedure for using this evaluation model, which enables both higher level and detailed evaluation. It includes quantitative as well as qualitative methods in order to provide comprehensive and deep insights. Finally, we describe an application of the proposed framework (both the model and the procedure) for the evaluation of a European e-infrastructure for opening government data. This first application has provided some first evidence concerning the applicability and usefulness of the proposed evaluation framework, and at the same time useful directions and ideas for the improvement of the above-mentioned e-infrastructure.

[43]
C. Alexopoulos, L. Spiliotopoulou, Υ. Charalabidis, Open Data Movement in Greece: A Case Study within the Financial Crisis, Proceedings of the PCI Conference 2013, pp. 12, Dec, 2013,
Υ. Charalabidis, A. Triantafillou, V. Karkaletsis, E. Loukis, Public Policy Formulation Through Non-Moderated Crowdsourcing in Social Media, IFIP Fourth International Conference on e-Participation - ePart 2012, Sep, 2012, Kristiansand, Norway
 

Abstract
The emergence of web 2.0 social media enables the gradual emergence of a second generation of e-participation characterized by more citizens’ control, in which government agencies post content (e.g. short or longer text, images, video) to various social media and then analyze citizens’ interactions with it (e.g. views, likes/dislikes, comments, etc.). In this paper we propose an even more citizens controlled third generation of e-participation exploiting web 2.0 social media as well, but in a different manner. It is based on the search by government agencies for content on a public policy under formulation, which has been created in a large set of web 2.0 sources (e.g. blogs and microblogs, news sharing sites, online forums) by citizens freely, without any initiation, stimulation or moderation through government postings. This content undergoes advanced processing in order to extract from it arguments, opinions, issues and proposals on the particular policy, identify their sentiments (positive or negative), and finally summarize and visualize them. This approach allows the exploitation of the vast amount of user-generated content created in numerous web 2.0 social media for supporting governments to understand better the needs, wishes and beliefs of citizens, and create better and more socially rooted policies.

Υ. Charalabidis, E. Loukis, A. Androutsopoulou, A System Dynamics Approach for Complex Government Policy Design - Application in ICT Diffussion, 9th International Conference on Modeling, Simulation and Visualization Methods (MSV '12) , Jul, 2012, USA
 

Abstract
In order to achieve e-governance, we are in need of new and more advanced tools, specifically designed towardssupporting the policy making procedure. The purpose of thispaper is to investigate the perspectives, provided by thedevelopment of decision support tools, to confront complex e-government phenomena. The analysis is performed using aSystemDynamics simulation model that enables policymakers to investigate the estimated impact of plannedgovernment initiatives. Simulation applies on the diffusion of Internet and Communication Technology. The developmentof the model, made in collaboration with the Observatory forthe Greek Information Society, addresses the digital divide inGreece. Data fromthe i2010 initiative indicators have beenused for the simulation. The results, arising fromtheexecution of alternative scenarios, indicate the parameters tobe changed through the implementation of actions to have thebest impact on society.

E. Loukis, Υ. Charalabidis, V. Diamantopoulou, Different Digital Moderated and Non-Moderated Mechanisms for Public Participation, Proceedings of the EMCIS 2012 European, Mediterranean, and Middle Eastern Conference on Information Systems, Late Breaking Papers, A. Ghoneim, R. Klischewski, H. Schrödl, M. Kamal, (eds), pp. 63-73, Jun, 2012, Munich, Germany, EMCIS
 

Abstract
Several off-line mechanisms have been developed and applied for the participation of citizens in government policy making and services design. The increasing adoption of ICT, and especially the Internet, by individuals allows the development of a new generation of digital mechanisms for public participation (e-participation). The dominant digital mechanism has been in the last ten years the development of official e-participation websites by government agencies, which provide to the citizens information on government activities and also policies and services under formulation, and allow them to participate in relevant consultations in electronic fora. However, the effectiveness of this mechanism has been much lower than expectations. In this paper are presented three different digital mechanisms for public participation, which have been developed by the authors as part of European research projects. The first of them is based on the use of structured e-forum, in which citizens can enter only annotated postings according to a predefined discussion ontology. The second is based on the use of a central platform which can publish policy-related content and micro-applications to multiple social media simultaneously, and also collect and process data on citizens’ interaction with them (e.g. views, comments, ratings, votes, etc.). While the previous mechanisms were moderated by government, the third one – still under development as part of the European research project NOMAD - is non-moderated. It is based on the search by government agencies for content on a public policy under formulation, which has been created in numerous social media and other sources (e.g. blogs and micro-blogs, news sharing sites, online forums, etc.) by citizens freely, without any government initiation, stimulation or moderation, and the advanced processing of this content.

E. Loukis, Υ. Charalabidis, Business Value of Information Systems Interoperability – A Balanced Scorecard Approach, European Conference on Information Systems (ECIS) 2012, Jun, 2012, Barcelona, Spain
 

Abstract
It is widely believed that the establishment of interoperability of firm’s IS with the ones of other cooperating firms (e.g. customers, suppliers, business partners) can generate significant business value. However, this has been only to a very limited extent empirically investigated. This paper contributes to filling this research gap by presenting an empirical study of the effect of IS interoperability on the four business performance dimensions/ perspectives proposed by the Balanced Scorecard approach (financial, internal business processes, customers, learning and innovation). In particular, we examine the effects of adopting three different fundamental types of IS interoperability standards differing in the level of detail and applicability: XML, industry-specific standards and proprietary standards. Our study is based on a large dataset from 14065 European firms (from 25 countries and 10 sectors) collected through the e-Business Watch Survey of the European Commission. It is concluded that all these three examined types of IS interoperability standards increase considerably the positive impact of firm’s IS on the above four business performance perspectives/dimensions; however, their effects differ significantly. The adoption of industry-specific interoperability standards has the highest positive impact, while proprietary and XML standards have similar lower impacts. These conclusions provide valuable empirical evidence of the multidimensional business value generated by IS interoperability and its strong dependence on the type of IS interoperability standards adopted.

E. Loukis, Υ. Charalabidis, A. Xenakis, Policy-Related Knowledge Management in Parliaments Based on an Extension of IBIS Framework, Transforming Government (tGov) 2012, May, 2012, United Kingdom
 

Abstract
In Parliaments there are huge amounts of knowledge concerning public policies for addressing social problems and needs, which is however contained in numerous long textual documents (e.g. drafts, laws, justification reports, discussions’ minutes, experts’ reports), and it cannot be exploited to a good extent. Its full exploitation necessitates an appropriate structured representation of it. In this paper, initially we analysed the legislation formulation process of the Greek Parliament and its main documents from a public policy perspective, focusing on the knowledge they contain on social problems and needs, and on public interventions (e.g. regulations, programmes, services provision, infrastructure building) for addressing them. Based on the conclusions drawn from this analysis we developed a methodology for the codification, representation and management of the policy related knowledge of Parliaments, which is founded on a well established product of CSAV research, the Issue-Based Information Systems (IBIS) framework. A first application of this methodology has been made for the whole set of documents produced for the Law on the ‘Contracts of Voluntary Cohabitation’ passed by the Greek Parliament. It was then evaluated using both quantitative and qualitative techniques based on the ‘Technology Acceptance Model’ (TAM). The evaluation concluded that the above representation/codification includes to a good extent the substantial elements of the policy related knowledge contained in the Parliamentary documents, and it is understandable by the users. At the same time it revealed weaknesses that lead us to the development of an extension of the IBIS framework in order to achieve a better representation of this knowledge.

Υ. Charalabidis, F. Lampathaki, C. Alexopoulos, S. Koussouris, S. Koussouris, A Classification of Future Internet Enterprise Systems Projects, Proceedings of the I-ESA Conferences 2012, pp. 10, Dec, 2012, Springer London,
C. Alexopoulos, E. Loukis, Υ. Charalabidis, A methodology for evaluating PSI e-Infrastructures based on Value Models, Proceedings of the PCI Conference 2012, Dec, 2012
 

Abstract
The trend of opening government data, in order to be used for scientific, commercial and political purposes, has resulted in the development of numerous e-infrastructures providing public sector information (PSI). The big investments that have been made in this direction necessitate a deeper understanding and assessment of the value they produce. This paper presents a methodology for evaluating PSI einfrastructures, which is based on the estimation of multiple value models corresponding to their main stakeholder groups: data users and data providers. Each value model consists of several value dimensions and their corresponding value measures, organized in three levels (associated with efficiency, effectiveness and future behaviour), and also the relations among them. The proposed methodology allows a comprehensive assessment of the various types of value generated by a PSI e-infrastructure for each stakeholder group, and also the interconnections among them. This enables a better understanding of the whole value generation mechanism and a rational definition of improvements priorities.

[51]
A. Zuiderwijk, M. Janssen, S. van den Braak, Υ. Charalabidis, Linking open data: challenges and solutions, 13th Annual International Conference on Digital Government Research, pp. 304-305, Dec, 2012, ACM Publications,
[52]
Υ. Charalabidis, F. Lampathaki, S. Koussouris, S. Mouzakitis, Envisioning Future Internet Enterprise Systems: Visionary Scenarios and New Research Areas, I-ESA Conferences, pp. 259-269, Dec, 2012, Springer Publications,
[53]
Υ. Charalabidis, F. Lampathaki, G. Misuraca, D. Osimo, ICT for Governance and Policy Modelling: Research Challenges and Future Prospects in Europe, 45th Hawaii International Conference on System Sciences, pp. 2472-2481, Dec, 2012, IEEE Computer Society,
[54]
A. Zuiderwijk, M. Janssen, R. Meijer, S. Choenni, Υ. Charalabidis, K. Jeffery, Issues and Guiding Principles for Opening Governmental Judicial Research Data, 11th IFIP WG 8.5 International Conference, pp. 90-101, Dec, 2012, Springer Publications,
[55]
Υ. Charalabidis, On new ways to generate value “from and for” society with ICT, 1st International Workshop on Common Value Management, pp. 6-7, Dec, 2012, Fraunhofer Verlag,
M. Maragoudakis, E. Loukis, Υ. Charalabidis, A Review of Opinion Mining Methods for Analyzing Citizens, Third international conference on eParticipation (ePart 2011), Sep, 2011, Delft, Netherlands, Springer Verlag
 

Abstract
Electronic Participation (eParticipation), both in its traditional form and in its emerging Web 2.0 based form, results in the production of large quantities of textual contributions of citizens concerning government policies and decisions under formation, which contain valuable relevant opinions and knowledge of the society, however are exploited to a limited only extent. It is of critical importance to analyze these contributions in order to extract the opinions and knowledge they contain in a cost-efficient way. This paper reviews a wide range of opinion mining methods, which have been developed for analyzing commercial product opinions and reviews posted on the Web, as to the capabilities they can offer for meeting the above challenges. The review has revealed the great potential of these methods for the analysis of textual citizens’ contributions in public policy debates, both for assessing contributors’ general attitudes-sentiments (positive, negative or neutral) towards the policy/decision under discussion, and also for extracting the main issues they raise (e.g. negative and positive aspects and effects, implementation barriers, improvement suggestions) and the corresponding attitudes-sentiments. Based on the conclusions of this review a basic framework for the use of opinion mining methods in eParticipation has been formulated.

E. Ferro, M. Osella, Υ. Charalabidis, E. Loukis, R. Boero, Policy Gadgets: Paving the Way for Next-Generation Policy Making, IFIP Third International Conference on e-Participation - ePart 2011, Aug, 2011, Delft, The Netherlands
 

Abstract
The article proposes the concept of Policy Gadget (Padget) as an innovative tool for leveraging the group knowledge produced over Social Media platforms inside policy making processes. The concept has been developed within an international research project named PADGETS financed in the context of the “ICT for Governance and Policy Modelling” call of the FP7. In addition, the article highlights the value proposition of Padgets within the policy cycle as well as their novelty with respect to existing practices in the use of ICT for participatory purposes.

[58]
F. Lampathaki, Υ. Charalabidis, D. Osimo, S. Koussouris, S. Armenia, D. Askounis, Paving the way for future research in ICT for governance and policy modelling, IFIP eGOV International Conference, Aug, 2011, Delft, The Netherlands,
[59]
F. Lampathaki, S. Koussouris, C. Agostinho, R. Jardim-Goncalves, Υ. Charalabidis, J. Psarras, Towards an Interoperability Science: Cultivating the Scientific Foundations for Enterprise Interoperability, CENT 2011: Collaborative Enterprises 2011 – Platforms, Processes, and Practices Advancing the Enterprise 2.0, Jul, 2011, Orlando / FL, USA,
[60]
S. Koussouris, F. Lampathaki, S. Mouzakitis, Υ. Charalabidis, J. Psarras, Digging into the Real-Life Enterprise Interoperability Areas Definition and Overview of the Main Research Areas, CENT 2011: Collaborative Enterprises 2011 – Platforms, Processes, and Practices Advancing the Enterprise 2.0, Jul, 2011, Orlando / FL, USA,
[61]
S. Armenia, Υ. Charalabidis, D. Falsini, F. Lampathaki, D. Osimo, K. Szkuta, Future research directions in Governance and Policy Making under the UE prism of ICT for Governance and Policy Modelling, 29th International Conference of the System Dynamics Society, Jul, 2011, Washington DC,
Υ. Charalabidis, E. Loukis, Transforming Government Agencies’ Approach to eParticipation through Efficient Exploitation of Social Media, European Conference on Information Systems (ECIS) 2011, Jun, 2011, Helsinki, Finland
 

Abstract
Government agencies are making considerable investments for exploiting the capabilities offered by ICT, and especially the Internet, to increase citizens’ engagement in their decision and policy making processes. However, this first generation of e-participation has been characterised by limited usage of the ‘official’ e-consultation spaces of government agencies by the citizens. The emergence of Web 2.0 social media offers big opportunities for overcoming this problem, and proceeding to a second generation of broader, deeper and more advanced e-participation. This paper presents a methodology for the efficient exploitation of Web 2.0 social media by government agencies in order to broaden and enhance e-participation. It is based on a central platform which enables posting content and deploying micro web applications (‘Policy Gadgets’-Padgets) to multiple popular Web 2.0 social media, and also collecting users’ interactions with them (e.g. views, comments, ratings) in an efficient manner using their application programming interfaces (API). These interactions’ data undergo various levels of processing, such as calculation of useful analytics, opinion mining and simulation modelling, in order to provide effective support to public decision and policy makers. The proposed methodology allows government agencies to adopt advanced and highly effective ‘hybrid’ e-participation approaches.

[63]
Υ. Charalabidis, A Roadmap for Research in Electronic Governance: The Grand Challenges, 5th International Conference on Methodologies, Technologies and Tools enabling e-Government, Jun, 2011, Camerino, Italy,
Υ. Charalabidis, E. Loukis, A. Androutsopoulou, Enhancing Participative Policy Making Through Simulation Modelling – A State of the Art Review, European Mediterranean Conference on Information Systems (EMCIS) 2011, May, 2011, Athens, Greece
 

Abstract
While previously public policy making was predominantly technocratic, based mainly on ‘first generation’ approaches employing mathematical optimization algorithms, in the last thirty years it has become much more participative, adopting ‘second generation’ approaches which involve the affected citizens to a continuously increasing extent. This trend has been reinforced by the explosive growth of the information and communication technologies (ICT) and especially the Internet, resulting to the development of e-participation. Public participation provides to the competent government organizations useful information on citizens’ interest in and acceptance of public policies under formation or application, and also numerous proposals for changes, improvements and enhancements of them. It is therefore necessary to support and enhance participative policy making with technocratic mechanisms and tools for screening these proposals and analysing them as to their outcomes, and also for forecasting the future evolution of citizens’ interest in and acceptance of them. The use of simulation can be a very useful tool for these purposes. In this paper we present a state of the art review of existing modelling and simulation approaches from the above perspective. In particular, we examine Discrete Event Modelling and Simulation, Monte Carlo Simulation, System Dynamics, Dynamic Systems, Cellular Automata and Agent-Based Modelling and Simulation. From this investigation it is concluded that System Dynamics seems to be the most promising for the above purposes, followed by Agent-Based Modelling and Simulation, and that both can contribute significantly to the technocratic enhancement of participative policy making.

[65]
D. Sarantis, Υ. Charalabidis, Life Cycle Model for Public Administration Ontology Design, eeeGOV Days, May, 2011, Ljubljana, Slovenia,
[66]
F. Lampathaki, Υ. Charalabidis, D. Askounis, Open Linked Data and Visual Analytics in Electronic Governance: State of Play and Perspectives, 8th Extended Semantic Web Conference, May, 2011, Heraklion, Greece,
R. Boero, E. Ferro, M. Osella, Υ. Charalabidis, E. Loukis, Policy intelligence in the era of social computing: towards a cross-policy decision support system, 8th International Semantc Web Conference, Dec, 2011, Heraclion, Greece, Springer Publications
 

Abstract
The paper presents a policy analysis framework developed through a process of interdisciplinary integration as well as through a process of endusers needs elicitation. The proposed framework constitutes the theoretical foundation for the decision support component of a technological platform bringing together Social Media and System Dynamics simulation developed withinthe PADGETS project. The main novelties introduced have to do with the possibility to provide decision makers with a set of synthetic, fresh and relevant data in a cost effective and easily understandable way.

[68]
Υ. Charalabidis, F. Lampathaki, A description framework for digital public services, "Towards a Service-Based Internet" ServiceWave 2010 Workshops, pp. 137-144, Dec, 2011, Springer LNCS,
[69]
Υ. Charalabidis, E. Ntanos, F. Lampathaki, An Architectural Framework for Open Governmental Data for Researchers and Citizens, IFIP EGOV 2011 Conference, pp. 75-82, Dec, 2011, Delft, Netherlands, Trauner Verlag,
[70]
Υ. Charalabidis, S. Koussouris, A. Ramfos, A Cloud Infrastructure for Collaborative Digital Public Services, IEEE Third International Conference on Cloud Computing Technology and Science, pp. 340 -347, Dec, 2011, IEEE Publications,
Υ. Charalabidis, G. Gionis, E. Loukis, Policy Processes Support through Interoperability with Social Media, 5th Mediterranean Conference on Information Systems (MCIS) 2010, Sep, 2010, Haifa, Israel
 

Abstract
Governments of many countries attempt to increase public participation by exploiting the capabilities and high penetration of the Internet. In this direction they make considerable investments for constructing and operating e-participation websites; however, the use of them has been in general limited and below expectations. For this reason governments, in order to widen e-participation, should investigate the exploitation of the numerous users-driven Web 2.0 social media as well, which seem to be quite successful in attracting huge numbers of users. This paper describes a methodology for the exploitation of the Web 2.0 social media by government organizations in the processes of public policies formulation, through a central platform-toolset providing interoperability with many different social media, and enabling posting and retrieving content from them in a systematic centrally managed and machinesupported automated manner (through their application programming interfaces (APIs)). The proposed methodology includes the use of ‘Policy Gadgets’ (Padgets), which are defined as micro web applications presenting policy messages in various popular Web 2.0 social media (e.g. social networks, blogs, forums, news sites, etc) and collecting users’ interactions with them (e.g. views, comments, ratings, votes, etc.). Interaction data can be used as input in policy simulation models estimating the impact of various policy options. Encouraging have been the conclusions from the analysis of the APIs of 10 highly popular social media, which provide extensive capabilities for publishing content on them (e.g. data, images, video, links, etc.) and also for retrieving relevant user activity and content (e.g. views, comments, ratings, votes, etc.), though their continuous evolution might pose significant difficulties and challenges.

Υ. Charalabidis, G. Gionis, E. Ferro, E. Loukis, Towards a Systematic Exploitation of Web 2.0 and Simulation Modeling Tools in Public Policy Process, IFIP Second International Conference on e-Participation (ePart) 2010, Aug, 2010, Lausanne, Switzerland
 

Abstract
The limited use of the ‘official’ e-participation websites by the citizens, their high heterogeneity in terms of political interests, educational level and technological skills and at the same time the emergence of the new web 2.0 social media necessitate central and local administration to exploit the numerous usersdriven virtual spaces, which have been launched through citizens initiatives with dramatic success in terms of adoption and usage, in order to widen and enhance e-participation. This paper describes a methodology for the systematic exploitation of the emerging Web 2.0 social media, in combination with established simulation modelling techniques and tools, by governmental organizations in the processes of public policies formulation. It is based on the concept of ‘Policy Gadget’ (Padget), which is defined as a micro web application combining a policy message with underlying group knowledge in social media and interacting with citizens in popular web 2.0 locations (such as social networks, blogs, forums, news sites, etc) in order to get and convey their input to policy makers. Such ‘Padgets’ will be created by a central platform-toolset and then deployed in many different Web 2.0 media. Citizens input gathered through ‘Padgets’ will be used in various simulation modelling techniques and tools, such as the Systems Dynamics methodology), which are going to simulate different policy options and estimate their outcomes and effectiveness. Finally, a use case scenario of the proposed methodology is presented, which outlines how it can be used in ‘real life’ public policy design problems.

E. Loukis, A. Xenakis, R. Peters, Υ. Charalabidis, Using GIS Tools to Support e-Participation – A Systematic Evaluation, IFIP Second International Conference on e-Participation (ePart) 2010, Aug, 2010, Lausanne, Switzerland
 

Abstract
In this paper a systematic evaluation is presented of an e-participation platform based on GIS tools, which has been developed as part of the FFED project co-financed by the European Commission. The evaluation methodology has been based on the Technology Acceptance Model (TAM), which has been elaborated and adapted to this particular type of IS, taking into account the particular objectives and capabilities of this platform. Our main evaluation dimensions were usage, ease of use, functional usefulness, political usefulness and importance of discussion topic; each of them has been analysed into a number of sub-dimensions. Using this methodology five pilot applications of this platform in „real-life‟ situations and problems have been evaluated with both quantitative and qualitative techniques. Finally it has been concluded that the use of GIS tools can provide significant value in the area of e–participation, which however depends on a number of context factors, such as citizens‟ computer literacy and familiarization, trust to the political system, interest of the sponsoring public authorities, appropriate promotion, importance of the topic under discussion and quantity and quality of reference information appended on the digital maps by public authorities.

[74]
F. Lampathaki, Υ. Charalabidis, S. Passas, D. Osimo, M. Bicking, M. Wimmer, D. Askounis, Defining a Taxonomy for Research Areas on ICT for Governance and Policy Modelling, IFIP EGOV 2010 International Conference, Aug, 2010, Lausanne, Switzerland,
[75]
M. Bicking, M. Wimmer, A. Triantafyllou, S. Koussouris, Υ. Charalabidis, Project and Programme Evaluation: Monitoring and Evaluation of EC‐funded E‐Participation Projects, IFIP EPART 2010 International Conference, Aug, 2010, Lausanne, Switzerland,
[76]
A. Hartman, A. N. Jain, J. Ramanathan, A. Ramfos, W-J Van der Heuvel, C. Zirpins, S. Tai, Υ. Charalabidis, T. Johannessen, T. Grønsund, Participatory Design of Public Sector Services, Electronic Government and the Information Systems Perspective (EGOVIS 2010), Electronic Government and the Information Systems Perspective, pp. 219-233, Aug, 2010, Bilbao, Spain, Springer Publications,
[77]
Υ. Charalabidis, R. Goncalves, K. Popplewell, Developing a Science Base for Enterprise Interoperability, Interoperability of Enterprise Systems and Applications Conference, Enterprise Interoperability IV, pp. 419-428, Apr, 2010, Coventry, Springer Publications,
[78]
Υ. Charalabidis, F. Lampathaki, D. Askounis, Emerging Interoperability Directions in Electronic Government, Interoperability of Enterprise Systems and Applications Conference, Enterprise Interoperability IV, pp. 419-428, Apr, 2010, Coventry, Springer Publications,
[79]
Υ. Charalabidis, O. Markaki, F. Lampathaki, I. Mantzakou, D. Sarantis, Towards a Scientific Approach to e-Government Research, t-Gov 2010, Mar, 2010, Brunel University, UK,
[80]
Υ. Charalabidis, D. Askounis, eGOVSIM: A Model for Calculating the Financial Gains of Governmental Services Transformation, for Administration and Citizens, 43rd Hawaiian International Conference on System Sciences (HICSS), Jan, 2010, Hawaii, US,
[81]
D. Sarantis, Υ. Charalabidis, D. Askounis, A Goal Oriented and Knowledge Based e-Government Project Management Platform, 43rd Hawaiian International Conference on System Sciences (HICSS), Jan, 2010, Hawaii, US,
[82]
F. Lampathaki, N. Kroustalias, S. Koussouris, Υ. Charalabidis, J. Psarras, Implementing Interoperability Infrastructures: Issues and Challenges from the Citizens’ Base Registry in Greece, 43rd Hawaiian International Conference on System Sciences (HICSS), Jan, 2010, Hawaii, US,
[83]
D. Osimo, F. Lampathaki, Υ. Charalabidis, Policy-making in a Complex World: Can Visual Analytics Help?, EuroVAST 2010: International Symposium on Visual Analytics Science and Technology, Dec, 2010,
[84]
F. Lampathaki, S. Koussouris, G. Gionis, Υ. Charalabidis, D. Askounis, Cross-Dimensional Modelling Patterns To Empower Pan-European Business to Government Services Interoperability, 4th IFAC/IFIP International Workshop on Enterprise Integration, Interoperability and Networking (EI2N) in conjunction with the OnTheMove Federated Conferences & Workshops (OTM 2009), LNCS 5872, pp. 152–161, Nov, 2009, Springer Publications,
[85]
D. Sarantis, Υ. Charalabidis, D. Askounis, An ontology for stakeholder collaboration and knowledge exploitation in e-government project management, 3th International Conference on Theory and Practice of Electronic Governance, Nov, 2009, Bogota, Colombia,
[86]
E. Ergazakis, K. Ergazakis, Υ. Charalabidis, D. Askounis, Developing Digital Cities in the Context of the Knowledge-Based Economy: Towards an Integrated Approach, eChallenges 2009 Conference, Oct, 2009, Istanbul, Turkey, IOS Press,
[87]
O. Markaki, D. Charilas, Υ. Charalabidis, D. Askounis, A Framework to Evaluate the Impact of e-Government Services in the Improvement of the Citizens’ Quality of Life, Second World Summit on the Knowledge Society , Sep, 2009, Chania, Greece,
[88]
Υ. Charalabidis, F. Lampathaki, D. Askounis, Metadata Sets for e-Government Resources: The Extended e-Government Metadata Schema (eGMS+), 8th EGOV Conference, Lecture Notes on Computer Science Volume 5693, pp. 341-352, Sep, 2009, Linz, Austria, Springer Publications,
[89]
S. Koussouris, L. Kipenis, G. Gionis, F. Lampathaki, Υ. Charalabidis, D. Askounis, User-Driven Technology Evaluation of e-Participation Systems, 1st ePart Conference, Sep, 2009, Linz, Austria, Trauner Druck Publications,
[90]
Υ. Charalabidis, F. Lampathaki, D. Askounis, A Review of Interoperability Standards and Initiatives in Electronic Government, 4th Mediterranean Conference on Information Systems, Sep, 2009, Athens, Greece,
E. Loukis, R. Peters, Υ. Charalabidis, S. Passas, C. Howe, Enhancing Deliberation for the Formulation and Application of Public Policy on the Environment and Energy Using Federated Content, Ontologies and Maps, IFIP First International Conference on e-Participation - ePart 2009, Aug, 2009, Linz, Austria
 

Abstract
The problems of formulation and application of various kinds of public policy concerning energy and environment are wicked’ and highly complex ones, with multiple and conflicting objectives and many stakeholders with different views, values and concerns. For this reason a deliberation among stakeholders and argumentation approach using advanced information and communication technologies (ICT) is the best way for addressing such problems. The use of e-participation technologies and methods can be very useful for this purpose. This paper describes an advanced ICT platform that has been developed for supporting and facilitating such deliberation and argumentation approaches, as part of the FEED (Federated e-Participation Systems for Cross-Societal Deliberation on Environmental and Energy Issues) project. This platform aims to support and enhance deliberation among all stakeholders and argumentation for the formulation and application of public policy concerning environment and energy, by providing i) federated content from various sources, ii) efficient mechanisms for accessing it based on ontologies and maps, and ii) stakeholders’ interaction capabilities through forum and petition functionalities. Also, a usage scenario of this platform is described.

[92]
Υ. Charalabidis, F. Lampathaki, D. Askounis, A Comparative Analysis of National Interoperability Frameworks, American Conference on Information Systems (AMCIS), (to_appear), Aug, 2009, San Francisco, US,
[93]
Υ. Charalabidis, D. Sarandis, D. Askounis, A Goal-Driven Framework for Electronic Government Projects Management, American Conference on Information Systems (AMCIS), (to_appear), Aug, 2009, San Francisco, US,
E. Loukis, R. Peters, Υ. Charalabidis, S. Passas, T. Tsitsanis, Using e-Maps and Semantic Annotation for Improving Citizens and Administrations Interaction, European and Mediterranean Conference on Information Systems (EMCIS) 2009, Jul, 2009, Izmir, Turkey
 

Abstract
The high potential of modern ICT for supporting citizens’ and administrations’ interaction for the formulation of public policies has been extensively recognized by academics and practitioners, resulting in a rapid development of the e-participation domain in the last decade. Extensive research is required for developing appropriate advanced information and communication technologies (ICT) platforms that exploit and realize this potential to the highest possible extent. In this direction this paper describes an advanced ICT e-participation platform that has been developed having as main objective to improve the quantity and quality of interaction among citizens, and also with public administrations, concerning the formulation of public policies and decisions on environmental and energy issues, as part of the FEED (Federated e-Participation Systems for Cross-Societal Deliberation on Environmental and Energy Issues) project of the European Commission. It enables citizens and administrations to upload geographically referenced multimedia content (e.g. pictures, videos, etc.) on an electronic map of the area which the public policy or decision under discussion concerns, so that other interested citizens or administrations can easily access and download them. The proposed e-participation platform provides: i) federated relevant content from various sources, ii) efficient mechanisms for accessing this content based on maps, semantic annotation and ontologies, iii) additional stakeholders’ interaction capabilities through forum and petition functionalities. Finally, a pilot application of this platform for supporting e-participation/e-deliberation concerning important environmental and zoning public policies and decisions in the Flevoland region, Netherlands, which has been designed by the project consortium and is going to be implemented in the near future, is described.

[95]
D. Sarantis, Υ. Charalabidis, D. Askounis, A Multi-facet Taxonomy as a Basic Object of e-Government Policy Formation, International Conference on E-Learning, E-Business, Enterprise Information Systems, & E-Government, Jul, 2009, Las Vegas Nevada, US, CSREA Publications,
[96]
P. Xidonas, M. Ergazakis, K. Ergazakis, K. Metaxiotis, Υ. Charalabidis, Equity Selection within the Frame of the Expert Systems Technology, 16th Annual Conference of the Multinational Finance Society, (to_appear), Jun, 2009, Rethymno, Greece,
[97]
Υ. Charalabidis, F. Lampathaki, D. Askounis, Adding Systems Support to National Government Interoperability Frameworks: A Good Practice Example from Greece – A Possible Strategy for European Member States, 7th Eastern European eGovernment Days (Austrian Computer Society), Apr, 2009, Prague, Czech Republic,
[98]
Υ. Charalabidis, L. Kipenis, S. Koussouris, J. Psarras, Analysis of Electronic Participation Projects at European Level, 7th Eastern European eGovernment Days (Austrian Computer Society), Apr, 2009, Prague, Czech Republic,
[99]
Υ. Charalabidis, F. Lampathaki, J. Psarras, Combination of Interoperability Registries with Process and Data Management Tools for Governmental Services Transformation, 42nd Hawaiian International Conference on System Sciences (HICSS), Jan, 2009, Hawaii,
[100]
Υ. Charalabidis, T. Tsitsanis, D. Askounis, A Rapid Application Development Method for Implementing Interoperable Electronic Services Portals in Local Administrations, eChallenges 2008 Conference, Oct, 2008, Stockholm, IOS Press,
[101]
Υ. Charalabidis, F. Lampathaki, A. M. Sourouni, D. Askounis, Governmental Interoperability Service Utilities: The way forward for Zero-Stop Electronic Service Composition and Provision, eChallenges 2008 Conference, Oct, 2008, Stockholm, IOS Press,
J. Hřebíček, Υ. Charalabidis, K. Kisza, E. Loukis, R. Peters, M. Štefaník, M. Hejč, Federated eParticipation Systems on Environmental Issues and its Role on Industrial Ecology, Environmental Informatics and Industrial Ecology (EnviroInfo) Conference 2008, Sep, 2008, Leuphana University of Luneburg, Germany
 

Abstract
The paper presents project needs of new solution in eParticipation initiative area focusing main environmental and energy issues that the new European energy policy has to deal with. The project FEED (Federated eParticipation Sys-tems for Cross-Societal Deliberation on Environmental and Energy Issues) is introduced as one possible solution. There will be discussed its main goals, platform architecture and project work plan.

[103]
Υ. Charalabidis, L. Kipenis, S. Koussouris, D. Van Lerberghe, D. Askounis, MOMENTUM: A Support Action for the Coordination of eParticipation Research in European Union, eDemocracy Conference (EDEM 08), Sep, 2008, Vienna,
[104]
Υ. Charalabidis, L. Kipenis, S. Koussouris, J. Psarras, Multi-Faceted Analysis of Electronic Participation Projects at European Level: A Systemic Approach, 2nd International Conference on Methodologies, Technologies and Tools enabling e-Government (MeTTeG 08), Sep, 2008, Corfu, Greece,
Υ. Charalabidis, G. Gionis, T. Tsitsanis, E. Loukis, J. Psarras, Federated eParticipation Systems for Electronic Deliberation on Energy and Environmental Infrastructure Development, Seventh International Electronic Government Conference (eGOV) 2008, Sep, 2008, Torino, Italy
 

Abstract
As electronic participation systems are becoming widely available, promoting the public debate on a variety of issues, a new challenge is emerging: how to organize, access and present multi-format supportive documentation from various sources. The more wide-spread eParticipation systems become, the more difficult is for the participants in electronic debates to find and relate documents, legal information or policy statements, on the issues discussed. In this world of multiple sources of unstructured and diverse information elements, the presented approach proposes the concept of federated eParticipation systems, able to dynamically locate and channel information from existing, diverse sources. The proposed architecture includes multimedia content management tools, syndication mechanisms and ontologically supported mechanisms, in an effort to provide the users with the proper information for supporting opinions and decisions. As a first application, energy and environmental issues are considered, which constitute an important subject of the European Union policy agenda, as well as a common issue for discussion at local and municipal level.

[106]
A. M. Sourouni, F. Lampathaki, S. Mouzakitis, Υ. Charalabidis, D. Askounis, Paving the way to eGovernment Transformation: Interoperability Registry Infrastructure Development, Seventh International Electronic Government Conference (eGOV 2008), DEXA, IFIP, Sep, 2008, Torino, Italy,
[107]
D. Sarandis, C. Tsiakaliaris, F. Lampathaki, Υ. Charalabidis, A Standardization Framework for Electronic Government Service Portals, Information Systems Development (ISD 2008), Aug, 2008, Paphos, Cyprus,
[108]
Υ. Charalabidis, F. Lampathaki, D. Sarandis, A. M. Sourouni, S. Mouzakitis, G. Gionis, S. Koussouris, C. Ntanos, C. Tsiakaliaris, V. Tountopoulos, The Greek Electronic Government Interoperability Framework: Standards and Infrastructures for One-Stop Service Provision, Panhellenic Conference of Informatics (PCI 2008), Aug, 2008, Samos, Greece, IEEE Publications,
[109]
G. Gionis, Υ. Charalabidis, D. Askounis, S. Koussouris, F. Lampathaki, Realising the Business Perspective of eTransactions among Heterogeneous Partners: The Practical Power of Hybrid Architectural Approaches, Interoperability of Enterprise Systems and Applications Conference, i-ESA 2008 (IFIP), Mar, 2008, Berlin,
[110]
Υ. Charalabidis, Ontological Support in eGovernment Interoperability through Service Registries, Interoperability of Enterprise Systems and Applications Conference, i-ESA 2008 (IFIP), Mar, 2008, Berlin,
[111]
Υ. Charalabidis, D. Askounis, Interoperability Registries in eGovernment: Developing a Semantically Rich Repository for Electronic Services and Documents of the new Public Administration, 41st Hawaiian International Conference on System Sciences (HICSS), Jan, 2008, Hawaii,
[112]
Υ. Charalabidis, G. Gionis, D. Askounis, P. Mayer, K. Kalaboukas, R. Stevens, H. Kuhn, Creating a Platform for End-to-End Business to Business and Government to Business Electronic Transactions in the new European Union: The GENESIS Project, eChallenges 2007 Conference, Oct, 2007, The Hague,
[113]
Υ. Charalabidis, M. Tschichholz, A. Hopkirk, Advancing the eGovernment Interoperability Framework in European Countries: Architectures, Challenges and Perspectives from the new Greek eGIF, eChallenges 2007 Conference, Oct, 2007, The Hague,
E. Loukis, M. Wimmer, A. Triantafillou, Υ. Charalabidis, G. Gionis, R. Gatautis, Development of Legislation through Electronic Support of Participation: the LEX IS Project, eChallenges 2007 Conference - European Commission, Oct, 2007, Hague, Netherlands
 

Abstract
The LEX-IS project (its full title being ‘Enabling Participation of the Youth in the Public Debate of Legislation’ among Parliaments, Citizens and Businesses in the European Union) is part of the ‘eParticipation’ Preparatory Action of the European Commission (Commission of the European Communities, 2006) aims for contributing to these issues. Its main objective is to improve the legislative process and output in the National Parliaments by enhancing public participation in the preparatory stages (legislation proposal formation stage and public debate of draft legislation), with special emphasis on the youth, using advanced ICT-based tools and methodologies, such as ontologies, metadata, argumentation support, facilitation and visualization methods, process management approaches.

[115]
S. Koussouris, Υ. Charalabidis, G. Gionis, T. Tsitsanis, J. Psarras, Building a Local Administration Services Portal for Citizens and Businesses: Service Composition, Architecture and Back-Office Interoperability Issues, eGOV 2007 Conference, Sep, 2007, Regensburg,
[116]
F. Lampathaki, Υ. Charalabidis, D. Sarandis, S. Koussouris, D. Askounis, E-Government Services Composition Using Multi-faceted Metadata Classification Structures, eGOV 2007 Conference, Sep, 2007, Regensburg,
[117]
Υ. Charalabidis, F. Lampathaki, D. Askounis, A. Stasis, Shifting To Second Generation E-Government Interoperability Frameworks, eGOV 2007 Conference, Sep, 2007, Regensburg,
E. Loukis, M. Wimmer, Υ. Charalabidis, A. Triantafillou, R. Gatautis, Argumentation Systems and Ontologies for Enhancing Public Participation in the Legislation Process, EGOV 2007 International Conference, Sep, 2007, Regensburg, Germany
 

Abstract
Argumentation systems and ontologies have the potential to support and enhance the participation of citizens in the development of effective and acceptable legislation concerning the complex and multidimensional problems that modern societies face. However, this potential has only to a very small extent been explored and realized. In this direction this paper describes an investigation of this potential, which is performed as part of the EU funded project LEX-IS. The main objective of LEX-IS is to improve the legislation process in the National Parliaments through enhanced public participation in the preparatory stages (legislation proposal formation and public debate of draft legislation) with the use of state-of-the-art ICT-tools and methodologies. This paper introduces four scenarios of public participation in above mentioned preparatory legislation processes thereby exploring the support of argumentation systems and ontologies. Along the scenarios, peculiarities of these two preparatory and highly significant stages of a legislation process are discussed, and results of existing relevant research are reflected. The basic features, advantages and disadvantages of each scenario are shown, and the LEX-IS design is sketched.

[119]
S. Koussouris, A. M. Sourouni, Υ. Charalabidis, J. Psarras, K. Kalaboukas, Generic Process Models for e-Business Transactions in Heterogeneous Systems, 11th Panhellenic Conference on Informatics (PCI 2007), May, 2007, Patras, Greece,
[120]
Υ. Charalabidis, G. Nikoloaidis, G. Gionis, D. Askounis, D. Sarandis, An Ontology for Municipal Government, 11th Panhellenic Conference on Informatics (PCI 2007), May, 2007, Patras, Greece,
[121]
S. Koussouris, F. Lampathaki, G. Gionis, A. Tsitsanis, Υ. Charalabidis, Building an eGovernment Services Portal for Local Administrations, 11th Panhellenic Conference on Informatics (PCI 2007), May, 2007, Patras, Greece,
[122]
Υ. Charalabidis, F. Lampathaki, A. Stasis, A Second-Generation e-Government Interoperability Framework: the Greek eGIF Case, Eastern European eGovernment Days Conference (eeeGOV Days 07), Apr, 2007, Prague, Czech Republic,
[123]
S. Mouzakitis, G. Gionis, K. Kalaboukas, Υ. Charalabidis, D. Askounis, Bridging eBusiness and eGovernment Interoperability in the new European Union: the GENESIS Project, Eastern European Government Days Conference (eeeGOV Days 07), Apr, 2007, Prague, Czech Republic,
E. Loukis, M. Wimmer, A. Triantafillou, R. Gatautis, Υ. Charalabidis, Electronic support of public participation in the development of legislation: the LEX-IS project’, 5th Eastern European eGov Days 2007, Apr, 2007, Prague, Czech Republic
 

Abstract
Information and Communication Technologies (ICT) can play an important role in facilitating the involvement of citizens and enterprises in the development of legislation and in managing the increasing complexity of the legislative processes. In this direction the main objective of the EU funded project LEX-IS is to improve the legislative process in National Parliaments through enhancing public participation in the preparatory stages (legislation proposal formation and public debate of draft legislation) with the use of state-of-the-art ICT-tools and methodologies. The main goals of the project are: a) development of tools for managing the complex legal frameworks and structures, b) development and use of ontologies and metadata schemas for the semantic annotation of legal elements (e.g. directives, laws, decrees, etc.), c) modelling of the draft formation and public consultation process using standard process management approaches such as BPMN to support direct integration in common workflow management systems and d) provision of tools for the active participation of citizens, businesses and non-governmental organizations in the above stages of the legislation process d) using argumentation support systems and web-based annotation facilities (ontology, semantic web services, Web 2.0, etc.) to the legal drafts. Using the above technologies the project aims to contribute to engaging citizens online, with special emphasis on the younger ones; bridging the growing gap between citizens and the state, represented by National Parliaments; improving the legislation process and its outcomes; and promoting e-Participation awareness.

[125]
G. Gionis, Υ. Charalabidis, T. Janner, C. Schroth, D. Askounis, A Hybrid Architecture for Enabling Electronic Transactions Among Enterprises and Governmental Bodies, i-ESA 2007 – Interoperability of Enterprise Systems and Applications (IEEE, IFIP, ACM), Mar, 2007, Madeira, Portugal,
[126]
G. Gionis, Υ. Charalabidis, K. Sourouni, D. Askounis, Modelling Legal Rules for Electronic Transactions in the European Union, i-ESA 2007 – Interoperability of Enterprise Systems and Applications (IEEE, IFIP, ACM), Mar, 2007, Madeira, Portugal,
[127]
G. Gionis, Υ. Charalabidis, D. Askounis, Capturing Legal Issues: A Methodological Framework to Serve All Needs, Workshop on “Enterprise Software Application Interoperability for Businesses and Governments” (ISBG 2006), in Conjunction with PAKM 2006, Nov, 2006, Vienna, Austria,
[128]
Υ. Charalabidis, Building a Second Generation e-Government Interoperability Framework : Standards, Schemas and Specifications, Workshop on “Enterprise Software Application Interoperability for Businesses and Governments” (ISBG 2006), in Conjunction with PAKM 2006, Nov, 2006, Vienna, Austria,
[129]
G. Gionis, Υ. Charalabidis, T. Janner, C. Schroth, S. Koussouris, D. Askounis, A Hybrid Architecture for Enabling Electronic Transactions Among Enterprises and Governmental Bodies, Conference on Practical Aspects of Knowledge Management, PAKM 2006, Nov, 2006, Vienna, Austria,
[130]
Υ. Charalabidis, G. Nikoloaidis, G. Gionis, A. Tsitsanis, D. Askounis, Knowledge Representation in e-Government: An Ontology for Electronic Municipal Services, Practical Aspects of Knowledge Management, PAKM 2006, Nov, 2006, Vienna, Austria,
[131]
Υ. Charalabidis, G. Gionis, D. Askounis, S. Koussouris, Enterprise Application Interoperability via Internet Integration for SME’s, Governmental Organisations and Intermediaries in the New European Union, eChallenges 2006 Conference, Oct, 2006, Barcelona, Spain,
[132]
Υ. Charalabidis, G. Gionis, F. Lampathaki, K. Metaxiotis, Organising Municipal e-Government Systems: A Multi-Facet Taxonomy of e-Services for Citizens and Businesses, eGOV 2006 Conference, Sep, 2006, Kracow Poland,
[133]
Υ. Charalabidis, D. Askounis, G. Gionis, A Model for Assessing the Impact of Enterprise Application Interoperability in the typical European Enterprise, Interoperability for Enterprise Software and Applications Conference, I-ESA'06, Mar, 2006, Bordeaux France,
[134]
Υ. Charalabidis, Συστήματα Ηλεκτρονικών Συναλλαγών ανάμεσα σε Επιχειρήσεις, Τράπεζες και Δημόσια Διοίκηση στα νέα Κράτη-μέλη της Ευρωπαϊκής Ένωσης, 9o Πανελλήνιο Συνέδριο Logistics, Nov, 2005,
[135]
S. Androutsellis - Theotokis, V. Karakoidas, G. Gousios, D. Spinellis, Υ. Charalabidis, Building an e-Business Platform: An Experience Report, e-Challenges 2005 Conference, Oct, 2005, Luibliana,
[136]
Υ. Charalabidis, H. Kuhn, A. Katzilieri, Achieving Interoperable Enterprise Applications Through Model-Driven Integration: The ERP-CRM Case, 16th IFAC World Congress, Jul, 2005, Prague,
[137]
Υ. Charalabidis, Emerging Systems and Services for e-Invoicing and B2B Collaboration in Greece, Emerging Systems and Services for e-Invoicing and B2B Collaboration in Greece, May, 2005, Athens,
[138]
Υ. Charalabidis, D. Chen, Achieving Enterprise Application Interoperability: Design Patterns and Directives, 5th International Conference on Practical Aspects of Knowledge Management (PAKM), Dec, 2004, Vienna,
[139]
V. Karakoidas, S. Androutsellis - Theotokis, D. Spinellis, Υ. Charalabidis, Applying MDA in Enterprise Application Interoperability: The PRAXIS Project, 5th International Conference on Practical Aspects of Knowledge Management (PAKM), Dec, 2004, Vienna,
[140]
Υ. Charalabidis, Π. Ψωρόιδας, Χρηματοδότηση της Εφαρμογής Πληροφοριακών Συστημάτων στις Ελληνικές Μικρές και Μεσαίες Επιχειρήσεις, 8o Πανελλήνιο Συνέδριο Logistics, Nov, 2004, Athens,
[141]
Υ. Charalabidis, V. Karakoidas, S. Theotokis, P. Spirakis, Enabling B2B Transactions over the Internet through Application Interconnection: The PRAXIS Project, e-Challenges 2004 Conference, Oct, 2004, Vienna,
[142]
Υ. Charalabidis, D. Spinellis, Application Interconnection and execution of Business to Business Transactions over Internet, 20th European Conference on Operational Research, Association of European Operational Research Societies (EURO-XX), Jul, 2004, Rhodes,
[143]
Υ. Charalabidis, S. Pantelopoulos, Y. Koussos, Enabling Interoperability of Transactional Enterprise Applications, Workshop on Interoperability of Enterprise Systems, 18th European Conference on Object-Oriented Programming (ECOOP), Jun, 2004, Oslo,
[144]
Υ. Charalabidis, S. Pantelopoulos, Enhancing Application Interoperability and Enabling B2B Transactions over the Internet for Small and Medium Enterprises: The PRAXIS Project, Workshop on Enterprise Modelling and Ontologies for Interoperability, 16th International Conference on Advanced Information Systems Engineering (CAISE), pp. 257 – 261, Jun, 2004, Riga, Riga Technical University / Springer Verlag,
[145]
Υ. Charalabidis, D. Askounis, Αυτοματοποιημένες Ηλεκτρονικές Δοσοληψίες μέσω Διαδικτύου για τον Εκσυγχρονισμό της Εφοδιαστικής Αλυσίδας στην Ελλάδα – Κατάσταση και Προοπτικές, 7o Πανελλήνιο Συνέδριο Logistics, Nov, 2003, Athens,
[146]
Υ. Charalabidis, “Increasing return on IT investments through the new, interconnected ERP, SCM and CRM Systems, 6th Logistics Conference, Nov, 2002, Athens,
[147]
Υ. Charalabidis, Supply Chain – wide IT systems dictate the re-enthroning of Process. Are we ready for the change?, 17th International Logistics Conference, Oct, 2001, Thessaloniki,
[148]
Υ. Charalabidis, Μοντέλα Ανάλυσης Επιπτώσεων και Προδιαγραφής Μετατροπών των Πληροφοριακών Συστημάτων από την Υιοθέτηση του ΕΥΡΩ, 3o Συνέδριο Logistics, Sep, 1999, Athens,
[149]
Υ. Charalabidis, D. Askounis, Μετά τα Συστήματα ERP : Dynamic Enterprise Modelling και Workflow στα Logistics Παραγωγής, 2o Συνέδριο Logistics, Oct, 1998, Athens,
[150]
Υ. Charalabidis, Π. Μούρτζινου, Π. Λεβέντης, J. Psarras, Βάσεις Γνώσης για την Ολική Επαναχρησιμοποίηση Αντικειμενοστρεφούς Λογισμικού, 5ο Πανελλήνιο Συνέδριο Πληροφορικής, Dec, 1995,
[151]
V. Assimakopoulos, Υ. Charalabidis, A. Konida, Knowledge Based Tools & Methodologies for Forecasting, International Symposium of Forecasting (ISF), Dec, 1993, Pittsburgh, USA,
[152]
Υ. Charalabidis, G. Vlondakis, E. Petra, Οργάνωση και Πληθύσμωση Βάσεων Πληροφοριών Λογισμικού, 4ο Πανελλήνιο Συνέδριο Πληροφορικής, Dec, 1993, Greece,
[153]
Υ. Charalabidis, E. Petra, T. Vavatsikos, Software Development Knowledge Modelling Towards Reuse, European Research Consortium on Information and Mathematics (ERCIM) Conference on Data and Knowledge Bases, Dec, 1993, Greece,
[154]
Υ. Charalabidis, E. Petra, G. Vlondakis, Populating Software Repositories : The SIB - WooRKS case, European Research Consortium on Information and Mathematics (ERCIM) Conference on Methods and Tools for Software Reuse, Dec, 1992, Greece,
[155]
Υ. Charalabidis, C. Chen, Storing WooRKS Application Frame in a Software Repository, Technical Demonstration / ITHACA Esprit Project, Object Oriented Programming Systems Languages and Applications (OOPSLA) Conference, Dec, 1992, Vancouver, Canada,

Βιβλία


Copyright Notice: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted or mass reproduced without the explicit permission of the copyright holder.


[1]
Υ. Charalabidis, F. Lampathaki, R. Jardim-Goncalves, Revolutionizing Enterprise Interoperability through Scientific Foundations, 2013, IGI Global, (to_appear)
[2]
Υ. Charalabidis, S. Koussouris, Empowering Open and Collaborative Governance: Technologies and Methods for On-line Citizen Engagement in Public Policy Making, 2012, Springer Publications
[3]
E. Loukis, A. Mackintosh, Υ. Charalabidis, E-Participation in Southern Europe and the Balkans: Issues of democracy and participation via electronic media, 2012, Routlege Publications
[4]
Υ. Charalabidis, F. Lampathaki, D. Askounis, Paving the way for Future Research in ICT for Governance and Policy Modelling, 2012, Bookstars Publishing
[5]
G. Misuraca, D. Broster, C. Centeno, Y. Punie, F. Lampathaki, Υ. Charalabidis, D. Askounis, D. Osimo, D. Skuta, M. Bicking, (eds), Envisioning Digital Europe 2030: Scenarios for ICT in Future Governance and Policy Modelling, 2010, IPTS JRC, European Commission
[6]
Υ. Charalabidis, (ed), Interoperability in Digital Public Services and Administration: Bridging E-Government and E-Business, 2010, US, IGI Global
[7]
Υ. Charalabidis, D. Askounis, (eds), Worldwide Interoperability Advances for Businesses and Administrations, 2010, Greece, Bookstars Publishing
[8]
Υ. Charalabidis, G. Gionis, K. M. Hermann, C. Martinez, Enterprise Interoperability Research Roadmap, 2008, DG Information Society and Media, European Commission
[9]
I. E. Σαμουηλίδης, B. Ασημακόπουλος, Υ. Charalabidis, H. Καλτσάς, Συστήματα Χρηματοοικονομικής Διοίκησης, 1995, Εκδόσεις Εθνικού Μετσόβιου Πολυτεχνείου

Κεφάλαια σε Βιβλία


Copyright Notice: This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted or mass reproduced without the explicit permission of the copyright holder.


[1]
Υ. Charalabidis, P. Stamoulis, A. Androutsopoulou, Public Services Reengineering through Cost Analysis and Simulation: The eGOVSIM II Platform, chapter in: Beyond Bureaucracy: Towards Sustainable Governance Informatisation, Alois Paulin, Leonidas Anthopoulos, and Christopher Reddick, (eds), 2017, Springer International Publishing AG, http://www.springer.com/de/book/978...
E. Loukis, Υ. Charalabidis, Active and Passive Crowdsourcing in Government, chapter in: Policy practice and digital science: Integrating complex systems, social simulation and public administration in policy research, Marijn Janssen, Maria Wimmer and Ameneh Deljoo , (eds), 2015, Spinger Verlag – Public Administration and Information Technology Series
Υ. Charalabidis, E. Loukis, Transforming Government Agencies’ Approach to eParticipation through Multiple Social Media Exploitation , chapter in: From information to smart society: environment, politics and economics, Lapo Mola, Ferdinando Pennarola, Stefano Za, (eds), pp. , 2015, Spinger Verlag - Lecture Notes in Information Systems and Organisation (LNISO),
E. Loukis, Υ. Charalabidis, V. Diamantopoulou, The Multidimensional Business Value of Information Systems Interoperability, chapter in: Revolutionizing Enterprise Interoperability through Scientific Foundations, Lampathaki Fenareti, Jardim-Goncalves Ricardo , (eds), 2014, IGI Global – Business Science Reference
[5]
L. Spiliotopoulou, Υ. Charalabidis, Web 2.0 in Governance: A Framework for Utilizing Social Media and Opinion Mining Methods and Tools in Policy Deliberation, chapter in: Technology Development and Platform Enhancements for Successful Global E-Government Design. IGI Global, K.J. Bwalya, (ed), pp. , 2013, IGI Global, (to_appear),
E. Ferro, M. Osella, Υ. Charalabidis, E. Loukis, Policy Gadgets for Urban Governance in the Era of Social Computing: An Italian Pilot on Telemedicine, chapter in: Citizen E-Participation in Urban Governance: Crowdsourcing and Collaborative Creativity, C. N. Silva, (ed), 2013, IGI Global – Information Science Reference
Υ. Charalabidis, E. Loukis, Towards New Web 2.0 Based Multi-Channel Approaches to e-Participation, chapter in: Transformational Government through eGov: Socio-economic, Cultural, and Technological issues, Yogesh Dwivedi , (ed), 2012, Emerald Publications
[8]
Υ. Charalabidis, Governmental Service Transformation through Cost Scenarios Simulation: The eGOVSIM Model, chapter in: Handbook of Research on E-Business Standards and Protocols: Documents, Data and Advanced Web Technologies, Kajan E., Dorloff F.-D., Bedini I., pp. 791-805, 2012, IGI Global,
[9]
Υ. Charalabidis, S. Koussouris, F. Lampathaki, G. Misuraca, ICT for Governance and Policy Modelling: Visionary Directions and Research Paths, chapter in: Empowering Open and Collaborative Governance: Technologies and Methods for Online Citizen Engagement in Public Policy Making, Charalabidis Y., Koussouris S., (eds), pp. 263-292, 2012, Springer Publications,
Υ. Charalabidis, G. Gionis, E. Loukis, S. Steglich, Exploiting Systematically Web 2.0 Social Media in Government for Extending Communication with Citizens, chapter in: Customer Relationship Management and the Social and Semantic Web: Enabling Cliens Conexus, R. Colomo-Palacios, J. Varajo and P. Soto-Acosta, (eds), 2011, IGI Global
Υ. Charalabidis, E. Loukis, V. Diamantopoulou, Υποστήριξη Διεργασιών Διαμόρφωσης Δημόσιων Πολιτικών με Χρήση Κοινωνικών Μέσων, chapter in: Συνεργατικό Δίκτυο και Κοινωνία, Ι. Αποστολάκης, (ed), 2011, Εκδόσεις Παπαζήση
E. Loukis, Υ. Charalabidis, Risk Factors of Large Internal Information Systems Projects in Government, chapter in: trategic Enterprise Resource Planning Models for E-Government: Applications & Methodologies, Susheel Chhabra, (ed), 2011, IGI Global
[13]
Υ. Charalabidis, R. Goncalves, K. Popplewell, Developing a Science Base for Enterprise Interoperability, chapter in: Enterprise Interoperability IV: Making the Internet of the Future for the Future of Enterprise, Popplewell, K.; Harding, J.; Ricardo, C.; Poler, R. , (eds), pp. 245-254, 2010, US, Springer,
[14]
F. Lampathaki, C. Tsiakaliaris, A. Stasis, Υ. Charalabidis, National Interoperability Frameworks: The Way Forward, chapter in: Interoperability in Digital Public Services and Administration: Bridging E-Government and E-Business, Y. Charalabidis, (ed), pp. 1-24, 2010, US, IGI Global,
[15]
Υ. Charalabidis, R. Goncalves, K. Popplewell, Towards a Scientific Foundation for Interoperability, chapter in: Interoperability in Digital Public Services and Administration: Bridging E-Government and E-Business, Charalabidis Y., (ed), pp. 355-373, 2010, US, IGI Global,
[16]
Y. Thermou, Υ. Charalabidis, I. Maglogiannis, Learning from the Past – Preparing for the future: On Medical Information Systems Evaluation, chapter in: Beyond e-Health: A Global Perspective, Shark A., Toporkoff S, (eds), pp. 21-46, 2010, US, Public Technology Institute ,
[17]
Υ. Charalabidis, A Framework for Assessing Interoperability in Public Administration at Organisational, Semantic and Technical Level, chapter in: Beyond e –Government Measuring Performance: A Global Perspective, Shark A.R., Toporkoff S., (eds), pp. 77-98, 2010, US, Public Technology Institute (PTI),
[18]
Υ. Charalabidis, D. Askounis, Achieving Interoperability Through Base Registries for Governmental Services and Documents Management, chapter in: Practical studies in e-government, Assar S., Boughzala I., Boydens I., (eds), 2009, US, Springer Verlag, (to_appear),
[19]
Υ. Charalabidis, D. Sarandis, D. Askounis, Knowledge-driven Project Management for achieving Electronic Government Transformation, chapter in: Handbook of Research on ICT-Enabled Transformational Government: A Global Perspective, Vishanth Weerakkody, Marijn Janssen, Yogesh K. Dwivedi, (eds), pp. 213-239, 2009, US, IGI Global,
[20]
Υ. Charalabidis, Ontological Support in eGovernment Interoperability through Service Registries, chapter in: Enterprise Interoperability III: New Challenges and Industrial Approaches, Kai Mertins, Rainer Ruggaber, Keith Popplewell and Xiaofei Xu, (eds), pp. 289-300, 2008, US, Springer,
[21]
Υ. Charalabidis, K. Metaxiotis, Ontology-based Management of eGovernment Knowledge, chapter in: Social and Political Implications of Data Mining: Knowledge Management in E-Government, Hakikur Rahman, (ed), pp. 222-236, 2008, US, IGI Global,
[22]
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