The heuristic methods used by the anti-trojan application TrojanHunter have been evaluated. The evaluation shows that the heuristic scan engine of TrojanHunter has a very good detection ratio and that the detection ratio can be even further improved by implementing the suggested improvements, the most important of which is a white list to avoid misidentifying files that are known not to be trojans..

Risktaganden görs på daglig basis och vår sinnestämning ligger till grunden för många av de risktaganden vi gör och styr hur vi upplever det ställningstaganden vi ställs inför. Den här studien ämnade att undersöka huruvida det gick att påverka en individs riskbedömning med hjälp av teorin om Affect heuristic samt hur mental visualisering kunde påverka en individs affekt i olika riktningar.Försöksdeltagarna bestod av 40 studenter vid Umeå universitet i åldrarna 19-35. De fick i en enkätundersökning ta del av och skatta risken för olika typer av scenarion. Resultatet från studien visade på en signifikant skillnad i förmån för mental visualisering i kontrast till resonerande av de presenterade riskscenarion, vilket stödde hypotesen om att mental visualisering kan påverka individers affekt och beslutsfattande. Studien ämnade att belysa vikten av affekt och dess inverkanöver vårt beslutsfattande och hur det går att påverka en individs affekt i olika riktningar genom att låta personen mentalt visualisera sig ett stimuli..

Looking at the debate on nuclear power in Sweden, the issue of risk is central to understanding the difficulties in resolving differences between proponents and opponents. I sought to answer the research question: "how is the concept of risk constructed in the nuclear power debate in Sweden?" Four main aspects of risk construction were defined and investigated to identify differences between sides in the debate. Through a qualitative study of the debate and its actors I found clear differences in respect to all four aspects of risk construction. First, the perception of nuclear power as a "normal risk" is common among nuclear opponents in contrast to a largely probabilistic view among proponents.

I syfte att förbättra kunskapsläget kring människors beteenden vid bränder och utrymningar studerades fyra brandsituationer hämtade från ett flertal verkliga händelser ur ett beslutsfattande- och riskbedömningsperspektiv. Det teoretiska underlaget hämtades ur Kahnemans och Tverskys forskning kring heuristiker (Kahneman och Tversky, 1974; Kahneman, Slovic & Tversky, 1982; Gilovich, Griffin & Kahneman, 2002). För ändamålet användes tre heuristiska regler: tillgänglighet, representativitet och affekt. Dessa tre heuristiker möjliggör ögonblickssnabba riskbedömningar genom att allt utom en särskild variabel bortses från i beslutsprocessen. När människor blir stressade tenderar de att förlita sig mer på heuristiker i sina bedömningar.

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.

For better understanding of how users interact with the video on demand service Netflix a study was conducted in 10 Swedish households. This study is based on the well-established heuristic evaluation method of Jacob Nielsen, which we modified slightly by letting the users to act as ?evaluation experts? and informing them about the heuristic rules of thumb during the evaluation process. The purpose of this study was to identify usability problems when people interact with Netflix? interface.

The amount of web APIs that are open to the public is increasing fast. Both the free web APIs as well as the ones that cost money to access. Both bigger and smaller organizations, professional and non-professional developers use these web APIs to add value to their systems or use it to create new applications. This is an area study where alot of research has been done in the last few years. In spite of this there are still no user-centered evaluation methods for web APIs.

This master?s thesis examines the possibility to heuristically optimise instruction cache performance in a Just-In-Time (JIT) compiler. Programs that do not fit inside the cache all at once may suffer from cache misses as a result of frequently executed code segments competing for the same cache lines. A new heuristic algorithm LHCPA was created to place frequently executed code segments to avoid cache conflicts between them, reducing the overall cache misses and reducing the performance bottlenecks. Set-associative caches are taken into consideration and not only direct mapped caches.

Every day we make numerous decisions. Some are better than others. Intuitive decisions usually results in less good decisions when we do not reason about our choices. Research has been interested about the process that is behind how we make good decisions. Decisions we face every day, such as when we shop, determined using various mental shortcuts that we use unconsciously.

Risktaganden görs på daglig basis och vår sinnestämning ligger till grunden för många av de risktaganden vi gör och styr hur vi upplever det ställningstaganden vi ställs inför. Den här studien ämnade att undersöka huruvida det gick att påverka en individs riskbedömning med hjälp av teorin om Affect heuristic samt hur mental visualisering kunde påverka en individs affekt i olika riktningar.Försöksdeltagarna bestod av 40 studenter vid Umeå universitet i åldrarna 19-35. De fick i en enkätundersökning ta del av och skatta risken för olika typer av scenarion. Resultatet från studien visade på en signifikant skillnad i förmån för mental visualisering i kontrast till resonerande av de presenterade riskscenarion, vilket stödde hypotesen om att mental visualisering kan påverka individers affekt och beslutsfattande. Studien ämnade att belysa vikten av affekt och dess inverkanöver vårt beslutsfattande och hur det går att påverka en individs affekt i olika riktningar genom att låta personen mentalt visualisera sig ett stimuli..

First-year students at Linköping University have developed a prototype that graphically visualizes a medical record in a new way. The customer of that project was the Department of Biomedical Engineering at Linköping University. They now want a usability evaluation to be performed of the prototype. The prototype is to be used by employees in the public health care and is supposed to be used on a small portable unit with a multi-touch interface. For this reason the prototype will be used as a complement to existing systems when the users work near the patients.

A unified model of stress and affect consciousness was proposed. The connection between affect consciousness and perceived stress was studied. Teachers (n = 19) were interviewed using Monsens affect interview, followed one month later by a questionnaire containing Perceived Stress Scale (PSS), State-Trait Anxiety Inventory (STAI-S, STAI-T) and Twenty Item Toronto Alexithymia Scale (TAS-20).Statistical analysis showed no connections between level of total affect consciousness and perceived stress. Though there were some indications of a negative relationship between affect consciousness and trait anxiety. There were also indications, using a complementary analysis, of a connection between level of affect consciousness on the subscale distress in the interview and perceived stress.

AbstractAs a young offender in Sweden today you can be sentenced to juvenile care within the social services. Within the juvenile care it may be an option for these young offenders to undergo an affect program. That is a collective name for several types of structured programs that can include everything from conversations to visits. The purpose of this study was to create an understanding of which arguments there are for why these affect programs for young offenders is being used in three municipalities in southern Sweden. We authors found this interesting because of the lack of evidence for these affect programs.

People with positive affect seem to have great advantages in life. Goal achievement, the main cause of well-being for all organisms, seem to be a typical trait of these people. The purpose of this study was to examine (i) what influences positive affect, (ii) the relation between positive affect and goal achievement, and (iii) characteristics of individuals with positive and negative affect. Five individuals with self-rated positive affect and two with negative were interviewed. The responses were classified in fifteen themes.

Detta arbete behandlar ämnet icke-diegetiska affect-ljud och dess användning inom skräckgenren. Arbetet undersöker effekterna av att undvika icke-diegetiska affect-ljud och mäter om samma grad av rädsla kan uppnås utan dem. Bakgrunden tar upp ämnet emotioner, med fokus på rädsla, samt en sammanfattning på ljudets karaktär, IEZA-modellen, begreppet immersion och ljudläggning inom skräckgenren. För att mäta den upplevda rädslan har två filmsekvenser skapats, med olika ljudläggningar. Den första sekvensen har ljudlagts med rikligt antal affect-ljud, medan den andra använder ljud från omgivningen för att skapa spänning.