Modelling of pollutants is commonly used in research and at departments working with environmental issues. The need to use large amounts of data when modelling creates the opportunity for more generalised models with lower data demands. Aggregating functions into coarser elements is a sort of generalisation of actual features in nature.A development of a method and a modelling tool called ?KadmiumKalkylatorn? has been performed to model cadmium pollution in rivers in Skåne, Sweden. The water runoff has been multiplied with cadmium standard concentrations based on membership in landuse classes.

The title of this essay is ?Collaboration between social services and schools?. Research shows that many children and youth who are badly treated are not noticed and do not receive the help that they need. This could be due to the lack of collaboration between different authorities and professionals. The purpose of this study is to describe and analyze how the social services and schools are collaborating in terms of children and youth who are badly treated or is at risk of being badly treated and to identify what factors make collaboration possible and hinder it.

Den traditionella förväntade nyttoteorin har kritiserats för att inte vara realistisk i sina förutsägelser om hur beslut tas vid risk. Eftersom de flesta situationer innefattar någon form av risk är det viktigt att utreda ifall man bör söka efter en alternativ teori. I denna uppsats undersöks hur väl nyttoteorin och en konkurrent till denna, prospektteorin, kan förklara riskbeteendet hos Black Jack-spelare. Detta görs genom en studie av fem individers spelbeteende på en krog i centrala Jönköping. Materialet analyseras både grafiskt och statistiskt genom att undersöka om individernas beteende förändras beroende på utfallet dels i de fem senaste händerna och dels under hela spelomgången.

Genom vår undersökning ville vi ta reda på om SALSA, Vodafones data warehouse tillgodoser användarnas informationsbehov. Som stöd för vår analys jämförde vi befintliga teorier inom områdena information samt data warehouse, med tillämpning i verkligheten genom vårt referensföretag. Undersökningen har utförts genom skriftliga intervjuer samt enkäter, där två olika undersökningsgrupper ingått. Den ena gruppen har utgjorts av SALSAs utvecklare och den andra av SALSAs användare. Den hypotes som vi arbetat med är "SALSA tillgodoser användarnas informationsbehov" med underfrågorna "Vilka krav kan användarna rimligen ställa på SALSA?", "Vilken information saknar användarna att få fram från SALSA?", "Vilka förslag på förbättringar gällande SALSA har användarna?" samt "Räcker användarforum för att framföra användarnas synpunkter på SALSA?". Då vi analyserat och bearbetat materialet från enkätundersökningen samt besvarat våra frågeställningar, har vi verifierat vår hypotes.

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

Syftet med detta examensarbete är att undersöka hur dator/Internet enligt fyra lärare kan fungera som ett pedagogiskt verktyg i undervisningen gällande gymnasieskolans yrkesämnen.Tidigare forskning visar att datoranvändning fyller en viktig funktion i kunskap och lärande och att dator/Internet som verktyg i undervisning är ett sätt att förbereda elever inför deras framtida yrke.Dator/Internet ersätter inte den traditionella hantverksundervisningen med att praktiskt överföra handlaget. Däremot kan dator/Internet vara nödvändigt i vissa moment i undervisning för att uppnå den moderna tidens krav.Nyckelord: Data/Internet, IKT, IKT som verktyg i undervisning, IKT utveckling, datakunskap.

The purpose of this study was to explore the connection between substance abuse and completed/attempted suicide. Central questions were who the substance abusers who commit suicidal actions were. The study also tries to find out which factors that contributes to this behaviour and why it is so common amongst substance abusers. All from the point of view of three scientist and three persons working with treatment of addicts who were interviewed. The results of these interviews were analysed on an individual level with a psychological theory.

Background: Each year approximately 30 000 people suffer from stroke in Sweden, often with substantial mental and physical consequences. Those who suffered from stroke handled the situation by mourning what they had lost and by accepting their changed body and life situation. For those who provide care for people who has suffered a stroke help and support was required. The caring science perspective was based upon caring and suffering. Aim: The purpose of this study was to describe family caregivers? experiences of caring for persons who had suffered a stroke.

During the beginning of the 19th century Sweden is effected by the Napoleonic Wars and in the aftermath of the war Sweden looses Finland to Russia. This loss leads to the dismissal of King Gustav IV Adolf and the introduction of the Bernadotte dynasty on the Swedish throne. Over the century the industrialization plays a big part in the progress of Sweden. The growth of the industries leads to developments in the areas of agriculture. With this essay I would like to examine if the people on the countryside of Gotland keep the same pace as the people on the mainland in their introduction of new things.

With numerous applications in both military and civilian life, the demand for accurate 3D models of real world environments increases rapidly. Using an airborne laser scanner for the raw data acquisition and robust methods for data processing, the researchers at the Swedish Defence Research Agency (FOI) in Linköping hope to fully automate the modeling process.The work of this thesis has mainly been focused on three areas: ground estimation, image segmentation and classification. Procedures have in each of these areas been developed, leading to a new algorithm for ground estimation, a number of segmentation methods as well as a full comparison of various decision values for an object based classification. The ground estimation algorithm developed has yielded good results compared to the method based on active contours previously elaborated at FOI. The computational effort needed by the new method has been greatly reduced compared to the former, as performance, particularly in urban areas, has been improved.

The purpose of this thesis is to examine how investments are justified in the Swedish data center industry, with a focus on cooling equipment. This is achieved through semi-structured interviews with 20 different interviewees. These interviewees represent different facets of the industry and facilitate an understanding of which factors, such as: investment costs, operating costs, reliability, environmental impact and the influence of external and internal actors, come into play and to which degree they impact the investment decision-making process. The results show that primarily low operating cost in the form of low energy consumption is the driving factor when it comes to the procurement of new equipment. A lower environmental impact is a positive side-effect of lower energy consumption.

SAAB Security and defense solutions i Järfälla har ett system som används av militären för övervakning av flygplan. Systemet visar på en datorskärm en karta över Europa där flygplanen visas med markeringar från data som samlats in av radars. Då data samlas in med en låg frekvens visas ytterligare en markering som kallas målspår. Dessa målspår beräknas fram med tunga matematiska beräkningar och sköts av datorns processor.Det finns ett önskemål om att flytta dessa beräkningar till datorns Grafikkort med hjälp av OpenCL och därmed frigöra processorns resurser. OpenCL har implementerats med två olika Java bindings och prestandaskillnader mellan dessa samt de ursprungliga beräkningarna har undersökts.

Denna studie handlar om den fartförlust och därmed den ökade energiförbrukningen som drabbar fartyg på grunt vatten. Syftet var att ta reda på hur mycket kortare en grund passage behöver vara för att den ska vara ett bättre alternativ än en lång och djup rutt med hänsyn till bränsleförbrukning och tidsåtgång. Resultatet av detta blev att det inte går att dra några generella slutsatser som gäller för alla fartygstyper men att det går att se tydliga tendenser. Studien hade även som målsättning att skapa ett underlag som skulle kunna användas av nautiker vid planering av resor, detta presenterades i form av en sammanställning av de resultat som erhållits vid beräkning av fartförlust i öppet vatten. Någon sammanställning gjordes inte för begränsat vatten eftersom exempelfartygen där fick likadana resultat vilket skulle ha gjort en sådan överflödig.

This master thesis reviews advances in detection and diagnosis of static friction (stiction) in control valves. Control valves suffering from stiction results in oscillating control loops which in turn decreases both the process stability and reliability. Perstorp AB sees a necessity to automatically detect stiction in valves before the effects of the malfunctioning valves have become too severe. This thesis presents an introduction to maintenance, control loops and how stiction in valves can affect performance of control loops.A selection of methods presented in the literature are introduced and examined using normal operating data from the site in Perstorp. Common for all selected methods is their intuitive ideas and that they are based on normal operating data and minimum amount of process knowledge.