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As the information society becomes increasingly flooded with digital images, the need for efficient image retrieval systems increases as well. To handle the vast amounts of data involved, the indexing process needs to be run automatically, using content-based descriptors …
In query expansion (QE) terms are added to an initial query in order to improve retrieval effectiveness. In this thesis we use QE in the sense that a reformulation of the query is done by deleting the terms in the initial query and instead replacing them with terms from the …
flata. Sökes: information. Om lesbiska, informationsbehov och ämnesbestämning av skönlitteratur.
The aim of this Masters thesis is, partly, to examine the information needs of lesbians: what discernable information needs they have, how they seek information and which information sources they use. The purpose is also to examine what part fiction plays regarding the …
The web has made an incredible amount of unorganized information available to anyone. There are search engines that help us structuring the information, but it is still difficult to find what you search for on the web. The purpose of this master's thesis is to investigate …
… at retrieving relevant academic material in the research-field of Library and Information science. The thirty search questions where based on actual information needs collected from exams within the field of Library and Information Science. This method was used to prevent that …
En komparativ studie av fyra metoder för relevance feedback
… Okapi BM25 within the probabilistic framework. This is done in a custom-made Information Retrieval system utilizing a collection containing 131 896 LA-Times articles which is part of the TREC ad-hoc collection. The methods are compared on two grounds, using only the relevance …
Problem och möjligheter med användarundervisning vid ett universitetsbibliotek
… Responses resulted then in an analysis using Christine Bruce's theory of information literacy and Carol C. Kuhlthaus theory of librarian roles and her theory of information retrieval process. In the survey and analysis section, I describe informants' background, teaching …
In information retrieval there is a problem with ambiguous words. To solve this problem word sense disambiguation WSD is used. Few studies combining information retrieval and word sense disambiguation have been conducted with Swedish words. The purpose of this thesis has been …
… are familiar with the subject. The thesis points out that Romanization causes information to be distorted in various ways and is inconsistent with the requirements of exactitude in bibliographic control. Different Romanization schemes make information exchange difficult and the …
… social and cultural issues have to be taken into consideration when new information retrieval systems are developed.
This thesis deals with query formulation in full text retrieval. The variables studied were query expansion and query structur[INS: e :INS , and the aim of the thesis is to study their co-effects on retrieval performance in a probabilistic system. The expansion was made with …
En jämförelse av återvinningseffektiviteten för fyra olika sökfrågetyper
… in an online library catalogue. The aim of the study was to compare the retrieval effectiveness of four different query types when applied to the online library catalogue of the University College of Borås. The query types were: an initial query, the initial query with right …
… to evaluate the music downloading service Musikwebb regarding its indexing and retrieval effectiveness. This was done by performing various kinds of search in the system. The outcome of these searches were then analysed according to the criteria specificity, precision, recall …
… the Query-by-Humming systems Midomi, Musicline and Tunebot regarding their retrieval effectiveness. The aim was to see if there were differences between the systems but also between the user groups common users, musicians and singers. Query-by-Humming system means that the user …
En studie av webbportaler, online-databaser och nätbibliotek för användare med läshandikapp
… The main aspects studied are formal description, representation, search and retrieval, document retrieval, and additionally also aspects related to content. The following questions are answered in this thesis: - How are web portals, online databases and Internet libraries for …
