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359 Uppsatser om Databases - Sida 1 av 24

Biovetare, bibliotek och bioinformatiska resurser

Bioinformatics is an interdisciplinary scientific subject which connects biology, biomedicine and information science. Bioinformatics generates new biological knowledge by using computer methods and biological Databases and can thereby play an important role for the understanding of diseases and be used for development of new medicines. The appearance of bioinformatics has thereby had a big impact on biomedical research.In this study, I have examined bioscientists' use of bibliographical Databases, bioinformatic Databases/web sites and bioinformatic tools and their needs of support concerning these resources. I have also examined which support the scientific libraries offer their users concerning bibliographical Databases, bioinformatic Databases/web sites and bioinformatic tools and have compared it with the needs the libraries think that the users have and the needs the users state that they have.The results from the study show that there is a wish for library support concerning bibliographical Databases, bioinformatic Databases/web sites and bioinformatic tools. The wishes of the respondents are in contrast to the libraries' view about bioscientists interest concerning bioinformatic Databases/web sites and bioinformatic tools.

I förändringens spår En undersökning av referensbibliotekariers accepterande av tillgängliggörandet och användandet av databaser på och via folkbibliotek

In Sweden most public libraries give users access to Databases. These Databases are sometimes possible to reach outside the library by internet at any time and this provides a change for the library and the society. Librarians function as change agents when they give access to Databases and when Databases are introduced to users. However, reports show that the use of Databases, especially those in English, is not high in reference work. This study aims at analysing attitudes of librarians to access and use of Databases on and by public libraries.

Experimentell jämförelse av Cassandra, MongoDB och MySQL

Context. Performance and resource usage is often an important factor for database driven services. Depending on the purpose of the application, choosing the wrong type of database may require unnecessary hardware upgrades or replacements. Objectives. This study investigates the differences in performance and resource usage between different SQL- and NoSQL-Databases.

Experimentell jämförelse av Cassandra, MongoDB och MySQL

Context. Performance and resource usage is often an important factor for database driven services. Depending on the purpose of the application, choosing the wrong type of database may require unnecessary hardware upgrades or replacements. Objectives. This study investigates the differences in performance and resource usage between different SQL- and NoSQL-Databases. The study is a comparison that focuses on how the Databases perform in different applications.

Effektiv och underhållssäker lagring av medicinsk data

Creating a database to manage medical data is not the easiest. We create a database to be used for a presentation tool that presents medical data about patients that is stored in the database. We examine which of the three Databases, MySQL with relational design, MySQL with EAV design and MongoDB that are best suited for storing medical data. The analysis i performed in two steps. The first step handles the database that is most effective to retriev data. The second step examines how easy it is to change the structure of the various Databases. The results show that depending on whether efficiency or maintenance is most important, different Databases are the best choise. MySQL with relational design proves to be most effective while MongoDB is the easiest to maintain..

Sälja eller låna ut, är det skillnad? - En experimentell komparativ studie av återvinningseffektivitet i bibliografiska databaser.

The aim of this thesis is to answer whether a group of Databases dedicated to selling books or a group of Databases dedicated to lending books is more efficient. The measurements used to determine the efficiency of the two kinds of Databases are Cumulated Gain and precision in modified versions. The inquiry has been conducted thus that the same 18 queries have been put forth to six Databases and these results have consequently been judged according to relevance on a 4-graded scale by five respondents. The rankinglevels have then been merged to one average value per respondent and ranking. These values have then been used to determine CG/iCG/nCG and P@n per query, rank 1-10, per database and per group (the groups being STORE (BUTIK) and LIBRARY (BIBLIOTEK).

Databaser i molnet : En prestanda utvärdering

AbstractAs a developer of database-driven applications you will be faced with difficult choices, when it comes to choosing database, server and programming language. For the result to be satisfactory it requires the different techniques to interact well with each other and also fulfill performance expectations. This is even more important when the application is deployed to the cloud and the response time plays a major role.This paper evaluates different Databases and their performance. To test the Databases there was an application made in the server script language PHP or Hypertext Preprocessor and it was deployed to Windows Azure cloud platform. The test applications task is to call and load Databases by controlled requests which creates, reads, updates and deletes data in an relatively large extent.The results shows that locale Databases or Databases in the same data center as the server generates the fastest response.

Samkörning av databaser-Är lagen ett hinder?

Title:Comparison of Databases ? Is the law an obstacle?Authors:Alexander Ankarberg, Applied Information Science.Tutors:Lars- Eric LjungProblem: Cross running Databases is getting more and more significant during the development of the information flow. There are huge benefits if we start to use the technique that already exists. The law is today an obstacle, so what would happen if the law wasn?t so stern.

Upphovsrättens sammanställningsskydd och sui generis-skyddet för databaser. En adekvat skyddsnivå på bekostnad av informationsfriheten?

Collections, compilations and Databases currently stand under a solid intellectual property protection in Sweden. This legal protection is partly a product of the old Nordic ?catalogue-rule? seen in the former 49 § of the Swedish copyright act (upphovsrättslagen) but was further extended by the implementation of the EU directive on the legal protection of Databases 96/9/EG and the new sui generis-right. Since major values are represented digitally combined with the fact that Internet serves as the main provider for information a strong legal protection for Databases must be carefully crafted. When crafting this kind of legal protection the right to freedom of information is balanced against the database producers? interests of property protection as well as social and public interests such as increased innovation.

Kontrollerat och okontrollerat språk En litteraturstudie i informationsåtervinning i databaser.

This thesis deals with one of the main questions within information science: The question about controlled and uncontrolled vocabulary and which of the two that are most effective when it comes to retrieve relevant information from electronic Databases. The method used here is literature studies. I have described and examined five empirical studies which has been done in purpose to compare the effectiveness in retrieval with controlled and uncontrolled vocabulary, in the way they are used in retrieval of information in Databases. The studies I have examined have also used recall and precision as a value to measure the effectiveness of retrieval. The studies which I have chosen is also limited to deal only with studies that have been done in bibliographic Databases.

Consumers' behaviour in the use of online services and the cultures effect on it-a study of Swedes and Danes use of online job databases

The thesis deals with consumers behaviour in the use of online services and the cultures effect on it. It is a study of Swedes and Danes use of online job data bases. The thesis is based on a quantitative study. A questionnaire were used sent out to 80 Swedes and 80 Danes. The theory concerns areas of online consumer behaviour, decision making and services theory as well as theories within culture in relation to services and behaviour.

Bibliometri och humaniora : exemplet Slavoj ?i?ek

The purpose of this Bachelor?s thesis is to explore the useability of bibliometric analysis on scientists of the humanities. This is accomplished by doing a case study on philosopher Slavoj ?i?ek. The work process and the results the case study is able to produce and the limits of these results are then analysed and discussed.In the case study all scientific articles in English published 1987-2010 citing ?i?ek were analysed.

Med läshandikapp på Internet: En studie av webbportaler, online-databaser och nätbibliotek för användare med läshandikapp

TPB, The Swedish Library of Talking Books and Braille, has requested a study to investigate the organization and content of a possible future Swedish web portal for users with reading disabilities. The aim of this thesis is to conduct such a study, with an emphasis on knowledge organization. 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 users with reading disabilities constructed, from an organization of knowledge point of view? - How can these solutions for knowledge organization be incorporated into a possible Swedish web portal? - With regards to content, which additional aspects are present in the studied web portals, online Databases and Internet libraries? The questions are addressed through a detailed study of ten web portals, online Databases and Internet libraries from Nordic and Anglo-American parts of the world.

Migration of a very large database with Swedish demographic data, using Microsoft SQL Server

SMC is in the process of developing a micro simulation model. The existing micro simulation model developed at Cornell University for US data, CorSim, is one of the fundamental parts for the new micro simulation at SMC. To develop the Swedish model, Swedish data on all individuals in Sweden during 11 years are also available. These data are organized in a database. This paper describes the process of rebuilding the database to a more useful structure.

Informationssökning i elektroniska informationskällor Valmöjligheternas vånda

The purpose of this thesis is to examine which factors influence librarians selection of electronic information sources, and to investigate whether librarians use of search strategies and search tactics changes depending on which information source they use. The electronic information sources are: online Databases, Online Public Access Catalogues OPAC, World Wide Web, and CD-ROM Databases. The theoretical framework is based on step 3 Select a source and step 4 Formulate a Query in Marchioninis information seeking model. The search strategies are divided into two categories: analytical and browsing strategies. In order to supplement the theoretical framework with empirical facts, 8 librarians were interviewed.

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