Weekly Hours: 5
ECTS Credits: 5
Description:Introduction to information retrieval systems. Modeling: Boolean, vector-space, set-theoretic, probabilistic, language models. Query Languages. Text processing and compression. Zipf and Heaps laws. Indexing: inverted lists, dictionaries, suffix trees. Information retrieval systems evaluation, standard text collections. Relevance feedback and query expansion. Automatic document classification and clustering. Web search: search engines, crawling methods, link methods. Parallel and distributed information retrieval.