Department of Information & Communication Systems Engineering
University of the Aegean

Department of Information
& Communication Systems Engineering

Information & Communication Systems Security
Information Systems
Artificial Intelligence
Computer & Communication Systems
Geometry, Dynamical Systems & Cosmology
Ανάκτηση Πληροφορίας

Title: Ανάκτηση Πληροφορίας
Lesson Code: 321-10202
Semester: 8
Theory Hours: 3
Lab Hours:
Faculty: Vasilopoulos Nikolaos
Content outline

Introduction to information retrieval systems. Information retrieval/filtering and browsing. Modeling: Set theoretic models, Algebraic models, Probabilistic models. Text processing and compression. Zipf's law and Heaps' law. Introduction to markup languages. Indexing methods: inverted files, suffix trees and arrays, signature files. Online search methods. Evaluation of information retrieval systems. User feedback and query expansion. Web search: search engines, web crawling techniques, link-based methods.

Learning outcomes

Understanding of the distinction between data retrieval and information retrieval. Familiarity with the architecture of an information retrieval system. Understanding of the properties of the Boolean, Vector-space, and Probabilistic models for information retrieval. Familiarity with the basic principles of text processing and basic properties of text corpora. Understanding of the most popular indexing methods used in information retrieval systems. Ability to evaluate information retrieval systems. Familiarity with user feedback and query expansion methods. Understanding of the properties of web information retrieval. Familiarity with web crawling techniques.


Not required.

Basic Textbooks

1. Christopher Manning, Prabhakar Raghavan, Hinrich Schutze, Introduction to Information Retrieval, Stanford NLP Group, 2009.

Additional References

1. Baeza-Yates and Ribeiro-Neto, “Modern Information Retrieval”, Addision Wesley, 1999.
2. Witten, Moffat, and Bell, “Managing Gigabytes: Compressing and Indexing Documents and Images”, Morgan Kaufmann Publishing, 1999.
3. C. J. van Rijsbergen, “Information Retrieval”, 2nd edition, 1979.

Learning Activities and Teaching Methods

Final written exam, personal project.

Assessment/Grading Methods
Activity Workload
Lectures 39 hours
Exercises 20 hours
Personal study 62 hours
Progress 1 hour
Final examination 3 hours
Total 125 hours (5 ECTS)


Language of Instruction
Greek, English (for Erasmus students)
Μode of delivery


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