Automatic query expansion has long been studied in information retrieval research as a technique that deals with the fundamental issue of word mismatch between query and document. The purpose of this thesis is to compare the retrieval effectiveness of different strategies for automatic query expansion. The strategies are based on local analysis of the corpus and use statistical information from the local document set to extract terms that suppose to adapt themselves to each individual search and therefore appear to be searchonyms to the index terms. The strategies compared are: association clusters, metric cluster and scalar cluster. Baseline queries of 24 topics are expanded using terms from the different clusters and searches are made.

A new FPGA suitable for space applications has just reached the market. To investigate whether there are any possible flaws or limitations similar to those previously seen on FPGAs, an evaluation has to be done. This master thesis contains the evaluation of this new radhard FPGA with focus on possible design limitations and package related electrical phenomena.Areas evaluated: Ground-/VDD bounce, Cross talk, Rise time sensitivit, Power cycling, Power consumption, Place and route tool, Radiation hardnessThis report contains all steps in the evaluation. From method to measurements, comparisons, theory, results and conclusions. In the evaluation work, special effort has been made to develop designs that really stress the FPGA to find potential problems.

The purpose of our study is to examine whether stress among social workers is present, and ifso, what strategies they and their supervisors use to manage work-related stress. The study isbased on a qualitative method. The data consist of interviews, with six social workers andthree supervisors. The study?s theoretical framework is based on KASAM, SOC-sense ofcoherence by Antonovsky, demand- control- support model by Karasek & Theorell, stresstheory by Hans Selye and coping strategies by Lazarus.

When Deng Xiaoping introduced his reform program, he began China's transition from a plan economy to a socialist market economy. Liberal theorists often argue that there is an automatic link between ?free market? and ?democracy?, however this link is not evident in China. This contradiction constitutes the problem area of this thesis.With a theoretical framework containing ?totalitarism? and ?Tang Tsous culturalist approach? I have analysed the leadership of CCP (China's Communist Party) and its strategies to maintain the Chinese political system.

The purpose of this study is to analyze how the parties (USA, Great Britain, UN and the European Union) legitimize their intervention in Bosnia-Herzegovina as seen from without the conceptions of sovereignty and intervention. USA and the UN have legitimized their intervention on security reasons. The American president, George W. Bush, claimed that democracies never engage in war with each other and that democracies were prosperous just because they were democracies. According to the president, that is why it is important to democratise the whole Balkan region to protect the international community from terrorism which grows in unstable and undemocratic states.

Syfte Studiens syfte är att bidra med kunskap om hur elever i en särskolekontext kan stödjas i sin skrivutveckling genom ett förändrat arbetssätt. Kan ett förändrat arbetssätt i form av en modellerande undervisning i en socio-kulturell kontext, och med bildstöd och skrivmallar, stödja elevers förutsättningar att formulera och överföra sina tankar till skrift?TeoriDen teoretiska utgångspunkten är det sociokulturella perspektivet på lärande där lärande sker i en social kontext och i samspel med andra människor där elevens proximala utvecklingszon utmanas.MetodStudien ingår inom det specialpedagogiska verksamhetsområdet och har en samhällsvetenskaplig relevans. Ansatsen är övervägande kvantitativ då den avser att mäta effekten av en intervention men det finns kvalitativa inslag då effektens storlek mäts genom en jämförande för- och eftertest i form av en lärarskattning av elevers texter. SlutsatserEffekten av interventionen visar på ett positivt resultat.

The purpose of this Master?s thesis is to investigate how librarians solve difficult reference questions. The aim is to discuss the nature of reference work ? do librarians make conscious decisions regarding search strategies or do they rely principally on their instincts, or simply chance. The thesis is a qualitative study.

The purpose of this study was to examine the routines of performance related pay systems in two Swedish municipal upper secondary schools. A second purpose was to examine what data was included for evaluation of a co-worker?s performance and how a principal collects data. The purpose was also to examine a principal and teachers´ view of performance related pay systems and if it was possible to note an agreement. Principals have been interviewed and teachers have answered a questionnaire to fulfil the purposes of this study.The study shows that the municipality had a good routine that included individual discussions with co-workers about their salary and had fixed municipal criteria.

This is a heuristic evaluation of Umeå university library?s Online Public Access Catalog (OPAC). It makes use of four of Nielsen?s ten heuristics, flexibility and efficiency to use, match between the system and real world, visibility of system status, and aesthetic and minimalist design. The evaluation was done by having 3 evaluators inspect the interface individually, as per Nielsen?s (1990) recommendation of 3-5 evaluators.

The function of budgetary controls is to control the resource allocation within companies. It can also be an instrument for measure and control subordinates and/or business units? performance (Van der Stede 2001). This paper concerns the latter; when the budgetary control function is used to measure and control subordinates performance based on budget. Previous research in this area has not yet accomplished to explain the effects of tight budgetary control which Hartman (2000) considers as the main issue to be concerned about in management accounting research.Previous research has presented contradictory findings regarding tight budgetary control explained by positive effects as well as negative effects during the last decades.

Boström, Johanna & Fahlander, Ann. (2011).Friskvård på arbetsplatsen. En nulägesanalys på Fastighetsförvaltning AB (A workplace physical activity intervention. An analysis of the situation at Fastighetsförvaltning AB). Bachelor Essay in Swedish.

The purpose of this study was to gain a better understanding of how medium-sized construction companies adapt and how they choose to reorganize their operations in relation to the recession. The study has as its theoretical starting point theories about organizational learning, the impact of the economy on construction companies and strategies for dealing with recessions. The method used to conduct the study was semi-structured interviews with representatives from 15 different construction companies. The results of the study show that they used several strategies to adapt and reorganize the business in accordance with the recession. Some construction companies had to make cost savings as a result of the recession.

When drivers overnight in the truck lots of electric energy is consumed by heaters, fans, lights and other extra equipment. If the engine is not running, this energy is taken from the lead/acid batteries of the truck which then needs to be recharged during operating hours. The fact that the charge acceptance of the lead/acid batteries is dependent on the temperature makes it hard to fully recharge the batteries at lower temperatures. A negative charge balance can lead to starting problems within a few days use in cold climate.In this thesis work, the effects of different battery charging concept are evaluated on the most common Scania battery (175Ah). A battery model is implemented in Matlab and some simulations of charging are made.

The purpose of our study is to examine whether stress among social workers is present, and ifso, what strategies they and their supervisors use to manage work-related stress. The study isbased on a qualitative method. The data consist of interviews, with six social workers andthree supervisors. The study?s theoretical framework is based on KASAM, SOC-sense ofcoherence by Antonovsky, demand- control- support model by Karasek & Theorell, stresstheory by Hans Selye and coping strategies by Lazarus.

Background: Energy drinks have been found in everyday-stores since 1997 and their popularity have increased over time. Consumtion of energy drinks takes place because of their ability to increase concentration and to decrease fatigue but also because of the popularity the drinks have got. Target groups for these stimulating beverages are adolescents and young adults. Energy drinks contain caffeine, taurine, glucuronolacton, carbohydrates and B-vitamins and voices have been raised about the eligibility for young people to ingest large quantities of these kinds of substances. Because of the properties of these substances it has become popular to mix energy drinks and alcoholic beverages to make up for the negative effects of alcohol and to be able to drink larger quantaties.Aim: The aim of this literature work was to investigate cognitive effects of the combination of caffeine in terms of energy drinks and alcohol and to determine if these effects could be harmful.Method: This literature work is based on five scientific articles retrieved from PubMed.