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Fundamental bounds on single-port antennas and on array antennas have been shown to depend on the electric and magnetic polarizability tensors. We show four such cases and compare how the polarizabilities enter into the bounds. One of the critical items in using these bounds is the determination of the polarizabilities. We here review methods to obtain the polarizabilities, and discuss some of the
Biografi över läkaren och stormästaren i SHT Gustaf Bodman (1831-1879).
During the whole evacuation modelling process, there are uncertainties in every task. To date, scarce literature is available on the assessment of those uncertainties and evacuation model users generally do not present this information consistently (if omitted at all) in evacuation modelling studies. Considering the classification made in other modelling fields (e.g. fire modelling), uncertainties
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
Abstract is not available
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
