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The design and analysis of specular radar absorbing materials are investigated throughout the dissertation. Although the topic has been investigated for more than 60 years by many researchers and numerous designs have been proposed, still many technical challenges are remained unanswered. The basic questions are, e.g., the optimal thickness of a design, the possibility of utilization of unconventi
We constructed hydrodynamical model atmospheres for mid M-type main-, as well as pre-main-sequence objects. Despite the complex chemistry encountered in such cool atmospheres a reasonably accurate representation of the radiative transfer is possible. The detailed treatment of the interplay between radiation and convection in the hydrodynamical models allows to study processes usually not accessibl
It is curious that, even though megaliths usually consist of several stones, archaeologists tend to study each of them as single units. In this paper, I argue that it makes much more sense to consider megaliths as assemblages of distinct fragments.
Combustion and emissions formation in a Volvo TD 100 series diesel engine running in a homogeneous charge compression ignition (HCCI) mode and fuelled with natural gas is simulated and compared with measurements for both with and without external exhaust gas recirculation (EGR). A new stochastic approach is introduced to model the convective heat transfer, which accounts for fluctuations and fluid
Vi har systematiskt gått igenom befolkningsbaserade studier, som separat har analyserat frekvenserna för depression och självmord eller självmordsbeteende och deras samband med alkoholberoende, alkoholmissbruk eller riskfylld alkoholkonsumtion. Depressionssjukdomar visade en stark ökning vid alkoholberoende, men endast en marginell ökning vid alkoholmissbruk och riskfylld alkoholkonsumtion. Hela 4
The thesis treats the subject of risk and vulnerability analysis of large-scale technical infrastructures. In particular the focus is on the development of methods for vulnerability analysis of electrical distribution systems. The methods and the concepts behind them should nevertheless also be seen as applicable to other technical infrastructures. Robust and reliable technical infrastructures are
The main purpose of this book is to study the relation between the personal, religious visions and auditions of the internationally known Swedish artist Violet Tengberg (born 1920) and her artistic creations. In the descriptive part of the study the artist’s "outer" activity in the form of artistic creation, development of motives, and exhibitions is presented. Complementary to this presentation,
Popular Abstract in Swedish Populärvetenskaplig sammanfattning Det magnifika skådespelet av erupterande geysrar, varma, rykande källor av skilda slag samt kokande lerpölar är en uppseendeväckande syn. Dessa extrema miljöer av hög temperatur och mycket låga pH-värden verkar långt ifrån livsbejakande. Trots detta finns liv representerat i form av mikroorganismer som här har funnit sina ideala livsmAbstract Hot springs in Iceland can serve as sources of thermophilic, xylanolytic bacteria secreting very thermostable xylanolytic enzymes. The aerobic, thermophilic bacteria Rhodothermus marinus secretes multiple xylanases and xylosidases. One of the xylanases was purified to electrophoretic homogeneity and was characterized. The N-terminal sequence showed no homology with other xylanases. The p
Människor är konsumenter under hela livet. En stor del av den konsumtionen är nödvändig, medan andra delar är överflödskonsumtion. Allt som konsumeras kräver resurser i form av råvaror och energi att tillverka och för att ta hand om det som blir avfall. Nästan alla människor i vårt land säger sig vara miljömedvetna. Många köper enbart miljö- eller kravmärkta produkter. Ändå kan vi inte undgå att v
Main objectives of this thesis were to evaluate a gamma scintigraphic method used to quantify drug aerosol deposition in the lung, to investigate the influence of two aerosol inhalation parameters on the distribution of inhaled dry powder within the airways, to assess pulmonary absorption kinetics and bioavailability of an inhaled hydrophilic solute in relation to site of deposition, and to assess
