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Responses are typically faster and more accurate when both auditory and visual modalities are stimulated than when only one is. This bimodal advantage is generally attributed to a speeding of responding on bimodal trials, relative to unimodal trials. It remains possible that this effect might be due to a performance decrement on unimodal ones. To investigate this, two levels of auditory and visual
Popular Abstract in Swedish Studier av enstaka makromolekyler gör det möjligt att få insikt i och karakterisera viktiga biologiska processer. DNA, livets molekyl, är av särskilt intresse här. I denna avhandling användar vi metoder från statistisk fysik för att studera olika aspekter av DNA i nanokanaler och dess smältegenskaper. DNA-smältning är inte bara relevant för förståelsen av denna molekylsInvestigation of single macromolecules makes it possible to gain insight into and characterize important biological processes. DNA as the molecule of life is of special interest here. In this thesis tools from statistical physics are used to study different aspects of DNA confined to nanochannels, with particular regard to its denaturation properties. The study of DNA melting from the theoretical
This thesis presents new cryptanalysis results for several different stream cipher constructions. In addition, it also presents two new stream ciphers, both based on the same design principle. The first attack is a general attack targeting a nonlinear combiner. A new class of weak feedback polynomials for linear feedback shift registers is identified. By taking samples corresponding to the linear
Popular Abstract in Swedish Min forskning handlar om hur nedbrytningen av fett i fettceller regleras genom att fosfat tas av och sätts fast på olika proteiner inuti fettcellerna. För att man skall förstå hur fettnedbrytning hänger ihop med att fosfat reagerar med proteiner är det bra att veta något om hur fettcellernas ämnesomsättning regleras. Energilagring och fettomsättning Människokroppen laAdipose tissue is the main site of energy storage of the body and an important endocrine organ. Knowledge of the regulation of fat metabolism and the endocrine factors secreted by the adipocyte is crucial for the understanding of diseases such as obesity and diabetes. Insulin is the main antilipolytic hormone. Protein kinase B (PKB) and phosphodiesterase 3B (PDE3B) are both phosphorylated and acti
Popular Abstract in Swedish Arbetet har bestått av att dels experimentellt samt dels med hjälp av matematiska modeller undersöka och kartlägga förloppen för nya samt "gamla" metoder att rena rökgaser från kol- och olje eldade kraftverk.Combustion of fossil fuels is the main source for emissions of sulfur dioxide and nitrogen oxides. Emission regulations and the growing environmental awareness will make great demands upon cost-effective deSO2 and deNOx techniques in the future. Many of the techniques available today have been on the market for a long time, however, most of them still have a potential for improvement. To be able t
Risk and vulnerability management can serve a very important purpose as a decision support tool for investments and planning of electrical distribution systems. In 2006 amendments to the Swedish Electricity Act came into force, stating that every distribution system operator has to, on a yearly basis, perform a risk and vulnerability analysis regarding security of supply to customers. Furthermore,
Popular Abstract in Swedish Hårdvara och algoritmer för ett inbyggt videoövervakningssystem presenteras i denna avhandling. För att verifiera systemet så har en prototyp byggts.The demands on video surveillance systems are rapidly increasing regarding parameters such as frame rate and resolution. Furthermore, with an ever increasing number of video streams, an automated process for extracting relevant information is required. Due to the large amount of input data and the computational complexity of the algorithms, software implementations are not sufficient to sustain re
The focus of this thesis is on modeling and control of the Open Plate Reactor (OPR), a new heat exchange reactor being developed by Alfa Laval AB. It combines intensified mixing with enhanced heat transfer capacity into one operation. With the novel concept, highly exothermic reactions can be produced using more concentrated reactants, thus saving time and energy in the subsequent separation stage
The GAIA astrometric mission has recently been approved as one of thenext two ``cornerstones'' of ESA's science programme, with a launch datetarget of not later than mid-2012. GAIA will provide positional andradial velocity measurements with the accuracies needed to produce astereoscopic and kinematic census of about one billion stars throughoutour Galaxy (and into the Local Group), amounting to a
Large-scale comparative genomics in harness with proteomics has substantiated fundamental features of eukaryote cellular evolution. The evolutionary trajectory of modern eukaryotes is distinct from that of prokaryotes. Data from many sources give no direct evidence that eukaryotes evolved by genome fusion between archaea and bacteria. Comparative genomics shows that, under certain ecological setti
