Purpose: To search for the tube voltage which results in the highest clinical image quality per effective dose unit for chest and pelvis radiography respectively, using image plates. Methods: Two anthropomorphic phantoms were imaged with several different tube voltages. For the chest phantom, the tube voltage was varied between 70 and 150 kV, and for the pelvis phantom between 50 and 102 kV. The m

Ultrafast optical response and excitation energy dynamics in light harvesting pigment-protein complexes and in a few model systems have been studied both experimentally and theoretically. Femtosecond light pulses were employed to excite the system and monitor the subsequent time evolution of the transient absorption kinetics and anisotropy. A new form of pump-probe technique was developed for perf

The latest technology and architectural trends have significantly improved the use of a large variety of glass products in construction which, in function of their own characteristics, allow to design and calculate structural glass elements under safety conditions. Both monolithic as well as laminated glass can be used for these proposals. In the case of laminated elements interlayers of polymers

Abstract The thesis aims at providing a better understanding of public policy instruments used in policy-making within the energy sector, particularly regarding their role in the change towards an increased use of renewable energy sources for generation of electricity. The research was guided by an underlying assumption that a markedly higher proportion of the energy generated from renewable sour

The aim of this chapter is to discuss two different approaches to the studying of cultures – the etic and the emic approaches. The two different approaches reflect not only different views on how cultures ought to be studied, but also to some extent different views on the nature of cultures. The etic approach suggests that it is possible to study cultures from “the outside” and that it is feasible

Abstract in French Dans cette étude, nous espérons pouvoir dégager certains phénomènes linguistiques qui s’acquièrent mieux en milieu scolaire, avec un enseignement des règles de grammaire etc., et d’autres phènomènes qui s’acquièrent mieux dans une situation d’acquisition non-guidée, avec un input riche et de bonnes occasions de dialogue parlé.

The concept of ‘industrial society’ is generally used for a type of social organization based on mass production of commodities. This type of societies began to dominate Western Europe toward the end of the eighteenth century, reflecting a strategy to expand export production in order to appropriate embodied labor and resources from elsewhere in the world-system. Perceived as progress and ‘develop

[abstract missing]

Popular Abstract in Swedish Lokal behandling med målsättning att förstöra kroppsvävnad genom uppvärmning (termoterapi) kan i vissa fall vara ett alternativ eller komplement till kirurgi. I avhandlingen presenteras utrustning och metoder för att, utifrån en fysikalisk synvinkel, göra sådana behandlingar säkrare och effektivare. Genom att beräkna temperaturefördelningen m.h.a. datorsimuleringar kan Local treatment with the aim to destruct tissue by heating (thermotherapy) may in some cases be an alternative or complement to surgical methods, and has gained increased interest during the last decade. The major advantage of these, often minimally-invasive methods, is that the disease can be controlled with reduced treatment trauma and complications. The extent of thermal damage is a complex fun