Popular Abstract in Swedish Nedfall av radioaktiva ämnen, framförallt Cs-137 från atmosfäriska kärnvapenprov och från Tjernobylolyckan, ger idag ett bidrag till den bakgrundsstrålning vi utsätts för. På grund av att Cs-137 har en förhållandevis lång halveringstid (30 år) kommer detta radioaktiva ämne att finnas kvar i ekosystemen för lång tid framöver och det är därför betydelsefullt att studera dIn this thesis a variety of sampling methods have been utilised to assess the amount of deposited activity, mainly of Cs-137, from the Chernobyl accident and from the nuclear weapons tests. Starting with the Chernobyl accident in 1986 sampling of air and rain was used to determine the composition and amount of radioactive debris from this accident, brought to southern Sweden by the weather systems

Popular Abstract in Swedish Den elektriska aktiviteten i hjärtats förmak vid kroniskt förmaksflimmer Bakgrund: Det mänskliga hjärtmuskeln består av fyra delar som var och en omsluter ett hålrum, vänster och höger förmak samt vänster och höger kammare. Ett hjärtslag, dvs den sammandragning av hjärtmuskeln som pumpar runt blodet i kroppen, utlöses normalt av att en elektrisk impuls bildas i sinuskChronic atrial fibrillation (CAF), with a prevalence progressively increasing with age, is one of the most common cardiac arrhythmias in man and associated with increased morbidity and mortality. Previous studies have shown that, in animals as well as in man, experimental atrial fibrillation is based on different types and dimensions of intra-atrial electrical re-entry. However, there is a lack of

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The composition of the colonic microflora is essential for the health of the human host. To be able to survive, the microflora is dependent of a continuous supply of substrate. In this respect dietary fibre and other indigestible carbohydrates, of which the consumption in affluent societies is generally low, are of great importance. Numerous of studies have demonstrated beneficial effects of dieta

We present a rasterizer, based on time-dependent edge equations, that computes analytical visibility in order to render accurate motion blur. The theory for doing the computations in a rasterization framework is derived in detail, and then implemented. To keep the frame buffer requirements low, we also present a new oracle-based compression algorithm for the time intervals. Our results are promisi

The Internet, mobile telephony and portable computers let today's user meet novel applications provided by the service developers, who are motivated by the popular customer trends in technology. However, the supply-demand chain observed in telecommunications causes the complexity of both the user devices as well as the network to increase. The complexity is caused by the need to support quality of

For how many years was a farmer responsible for running a farm in Sweden’s old peasant society’? This is the question that underpins my research into life in Ramkvilla parish in the province of Småland for two hundred years (1623–1819). By conducting a detailed study of farm practice at the individual level, I have been able to analyse a complex theme that touches upon the issues of responsibility

Through practical experiments, edge-wear analysis, and the study of archaeological collections, the dissertation explores the complex relationship between style and function in a specific class of artifacts: the Neolithic axe. The results of the three-part approach described above, when applied for instance to thin-butted axes from the Funnel Beaker Culture, indicated that there was no clear-cut c

In this paper, we explore the significant challenges relating to investment in IT in business. Information technology does not in itself deliver business value. We highlight the complexities that are often ignored in management of IT projects. If the management system in an organization is ineffective, then installing information technologies does not constitute a ‘magic wand’ that will generate p