Popular Abstract in Swedish Bortglömda, stulna eller på andra sätt borttappade radioaktiva strålkällor som kan anses vara farliga för allmänheten kallas herrelösa strålkällor. Denna avhandling handlar om metoder för att hitta herrelösa strålkällor som emitterar s.k. gammastrålning, bestående av ljuspartiklar med mycket hög energi. Gammastrålning har god förmåga att penetrera materia och kan därförHazardous radioactive sources out of regulatory control are referred to as orphan sources. Focussing on gamma-emitting orphan sources, this thesis describes methods that can be used in mobile gamma-ray spectrometry to perform real-time discrimination between an actual source signal and the signal due to the natural radiation background. Two categories of methods for orphan source detection are pre

The World Wide Web is undoubtedly very successful. Despite that, limitations have been recognized. The basic limiting factor is that the Web handles document for humans to read but not data and information for computers to read. The remedy of this is to provide the Web with semantics: the Semantic Web. While I agree that there is a need for another organization in which it is easier to find the in

I denna essä analyseras rätten till skilsmässa vid hustrumisshandel i 1800-talets politiska debatt och den praktiska hanteringen av hustrumisshandel i kyrkliga och världsliga rättsliga instanser.

When simulating small probabilities, say of order 10-6 or less, by importance sampling, an established principle is to choose the importance sampling distribution as close to the conditional distribution given the rare event as possible. Implementing this often leads into large deviations calculations and exponential change of measure. We survey some of the standard examples where this approach wo

Lärobok i dynamisk psykoterapi bestående av III delar. Del I Teoretiska utgångspunkter Del II Fallbeskrivningar; barn och vuxenpsykoterapi Del III Lärandeguide med seminarieförslag utifrån PBL och casemetodik

The sialyl Lewis x (SLex) tetrasaccharide is the smallest recognizable ligand for selectins. The selectins constitute a vital part of the inflammatory cascade for recruitment of leukocytes to a site of tissue damage or microbial infection. If too many leukocytes are recruited, normal, not injured, cells can be damaged; a process known from chronic inflammatory diseases such as reumatoid arthritis,

The unfolding of choral history and the development of pedagogical ideas largely depend on a combination of social and musical factors. This is what makes choral research both interesting and challenging. Choral representation of societal change does emerge at different historical periods in the European countries – for example in connection with the French Revolution, in Sweden after World War II

The former close relation between producer and consumer has gradually disappeared in the industrialisation and globalisation of the food industry. As a result a need for traceability has emerged. It is difficult today for consumers to know if the products they purchase live up to their specifications due to poor communication between the food industry and consumers. This gap between can be address