The aim of this thesis was 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, exclusivity and authority control. The study showed that Musikwebb had several flaws regarding its retrieval effectiveness. The most prominent cases were the criteria exclusivity and specificity.

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 documents retrieved in the initial run. The aim of this thesis is to, in a experimental full text invironment, study and compare the retrieval result of two different query expansion strategies in relation to each other. The following questions are addressed by the study: How do the two strategies perform in relation to each other regarding recall? What may be causing the result? Are the two strategies retrieving the same relevant documents? Two strategies are designed to simulate a searcher using automatic query expansion (AQE) either with or without relevance feedback.

The intention of the essay was to see what Web users? comprehension might be when watching four videos that are published on the Swedish Government?s Web site. One video contains an interview with Lena Hallengren, Minister for Youth Affairs of the Swedish Government, and in the other three Ulrica Messing, Minister for Communications and Regional Affairs of the same government, gives speeches about the governmental issues she is responsible for. The comprehensions that were examined are those concerning the forms of presentation of the videos, the ministers? appearances, the videos abilities to create and maintain the Web site visitors? interest, and the visitors? behaviours and conducts while being in contact with the Web site.

Denna studie följer elever som deltar i bänkinteraktion omkring matematik med sin lärare. Syftet med studien är att undersöka hur elever beskriver att få enskild hjälp som stöd för sitt lärande. Jag söker möjligheter och hinder som uppstår i lärar- elev interaktioner. Elevernas erfarenheter kan bli en utgångspunkt för hur matematiklärare och speciallärare kan tänka omkring undervisning i klass eller undervisning av elever i behov av stöd.Studien har en sociokulturell ansats och är gjord enligt metoden stimulated recall, som i denna studie innebar videoinspelade bänkinteraktioner i kombination med intervjuer omkring inspelningarna. Eleven fick se videoklippet efteråt och med egna ord berätta vad som hände och hur eleven hade tänkt i situationen. .

The aim of this thesis is to examine how thesauri constructed with latent semantic indexing LSI are performing when used for query expansion. There is a well-known problem with synonymy in information retrieval and one solution to this problem is to use a thesaurus. In this thesis thesauri are created automatically to find statistically related words and not only synonyms. LSI is a method that uses singular value decomposition SVD to reduce dimensions in a matrix and find latent relationships between words. We constructed nine thesauri and used them for query expansion in a Swedish database, GP_HDINF.

The aim of this masters thesis is to examine query expansion. Query expansion is the process of adding new terms to a query to improve the retrieval effectiveness. In this study the baseline query was expanded in five different modes. The first expansion strategy was formulated by the inflected terms as the system does not allow truncation, I have inflected the terms, e. g.

We investigate the effects of various types of word-of-mouth (WOM) messages on consumer bahavior. The message is varied along two dimensions where one is valence and the other is whether or not it contains an explicit call for certain behavior or attitude change. We use an experiment in the form of a web-based survey. Five different scenarios were designed to represent neutral, positive, and negative WOM. The latter two came in two different versions - one with a recommendation and one without.

Vårt syfte med denna studie är att undersöka hur pedagoger i en Reggio Emiliainspirerad förskola uttrycker möjligheter att använda naturmiljön som inspirationskälla till lärande i och om naturen. Genom kvalitativa intervjuer med hjälp av metoden stimulated recall har fyra pedagoger vid Spira förskola i Luleå delgivit oss deras uppfattningar om ämnet. Materialet har bearbetats och analyserats med hjälp av meningskoncentrering. Resultatet visar att det ursprungliga syftet med en planerad lärandeaktivitet inte alltid kommer fram i genomförandet. Vidare visar resultatet att pedagogerna uttrycker möjligheter till lärande när barn vistas i naturmiljö.

Studien är baserad på lärares erfarenheter av läsförståelseundervisning.Utgångspunkten i studien är sviktande resultat i läsförståelse i internationella undersökningar för svenska elever. Det är en kvalitativ studie som syftar till att undersöka och beskriva lärares erfarenheter av medveten explicit läsförståelseundervisning i klassrumsmiljö. Metoden som används är öppna intervjuer. Respondenterna undervisar alla i svenska i skilda åldersgrupper, en från varje stadium på grundskolan samt gymnasiet. Framträdande i studiens resultat är att lärare är mycket intresserade av att ge elever god läsförståelse.

The purpose of this thesis is to examine and analyze the communication effects from the campaign SAS EuroBonus American Express Card. Our aim is to measure the advertising effectiveness of the campaign.To gather primary data we have conducted a quantitative survey at Arlanda Airport, where the campaign is mainly located. The survey included a total of 253 respondents representing the population at Arlanda Airport.Our conclusion is that there is an awareness of the presence of American Express at Arlanda. The company is clearly dominating among its competitors regarding visibility at the airport. Despite this, only a moderate degree of the travelers recognize the pictures from the campaign.

Without being aware of it, cognitive processes continuously take place in our heads. We are forced to fill in the information gaps that we meet in our everyday life in order to create an understanding and to form a whole, and that?s where the importance of inference comes in. To create inference implies creating meaning from something that is not explicitly given. Having knowledge about this process offers great possibilities, while not taking it into account may involve risks.

The purpose of this Masters thesis is to examine the performance of queries that are expanded by synonyms and hyponyms from Svenskt OrdNät, the Swedish version of the Princeton WordNet. Four different types of queries were constructed: a baseline query S1, the baseline query expanded with synonyms S2, the baseline query expanded with hyponyms S3 and finally the baseline query expanded with the synonyms and hyponyms used in S2 and S3. The terms for expansion were picked by hand. The queries were executed in the Query Performance Analyser QPA, a tool used in IR education and in experimental IR research for analysing and comparing the performance of individual queries. 20 topics from the test collection GP_HDINF were chosen for the experiment.

Communication is an important part of any multi-agent system. There are different ways of communicating and they have different effects on a multi-agent system. This project describes and evaluates two different ways of communication, implicit and explicit. To compare the two methods, two experiments have been executed. The result of the experiments have been compared and discussed.

The right usage of tacit and explicit knowledge is becoming increasingly important for businesses worldwide. This thesis searches the answer to how management consultants tackle the challenges originating from converting this type of knowledge into codified use. With the help of a case study analysis it was possible to gain special insight into the processes of knowledge collection, codification and re-usage at a major organization built upon knowledge utilization. In order to provide the reader with a wider picture, the main subject of the study has been analyzed from two perspectives: a practice based and an objective based perspective. Furthermore, two different types of knowledge, tacit and explicit have been differentiated and studied in relation to each other, to gain a better understanding of their origin and conversion process.

This Masters thesis deals with query expansion 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 hand truncation, the initial query expanded with synonyms and finally the initial query expanded with synonyms and right hand truncation. 24 topics were formulated, and four queries for each topic were constructed. The records retrieved by the searches were judged with regard to topicality, and were judged to be non-relevant, partially relevant or relevant.