Search results

Popular Abstract in Swedish Denna avhandling behandlar olika frågor som var och en är av stor betydelse för förståelsen av dynamiska brott i stål. Särskilt betonas sprickpropageringsförsök, utförda i överslagsområdet mellan segt och sprött beteende, samt de slutsatser som kan dras av försöken. En fråga berör den fysikaliska bakgrunden till viskoplasticitet. Det visar sig att en beskrivning av terThe thesis addresses different questions, each necessary in the understanding of dynamic fracture initiation and crack propagation in steel. Emphasis lays on dynamic crack propagation experiments performed in the ductile to brittle transition region and possible conclusions, that can be drawn from them. One question regards the physical basis for for viscoplasticity. Dislocation slip by thermal a

Less than a decade has elapsed since the publication in 2000 of the first anthology devoted to lipocalins (Biochim Biophys Acta 1482, 2000), and only a few years since the first Lipocalin International Symposium in Copenhagen in 2003 (Benzon Symposium no. 50 “The Lipocalin Protein Superfamily,” Copenhagen, 2003) and the introduction of a public lipocalin website (http://www.jenner.ac.uk/lipocalins

Cellular Neural Networks have become a popular paradigm for modeling nonlinear systems. First-hand implementations are in software on floating-point platforms for pure performance, while programmable analog circuitry has been tested for embedded low-power applications. The paper discusses gradual algorithmic and structural improvements that bring efficient digital hardware into consideration. This

Abstract is not available

The effect of hydrogen enrichment to natural gas flames was experimentally investigated at atmospheric pressure conditions using flame chemiluminescence imaging, planar laser-induced fluorescence of hydroxyl radicals (OH PLIF) and dynamic pressure monitoring. The experiments were performed using a 3rd generation dry low emission (DLE) burner used in both SGT-700 and SGT-800 industrial gas turbines

Popular Abstract in Swedish 2003 års Nobelpris i kemi gick till professor Peter Agre för upptäckten av aquaporinerna. Aquaporiner är proteiner som sitter i membran och bildar kanaler som tillåter vatten och andra små neutrala molekyler att passera genom membranet. Aquaporinerna utgör en mycket gammal och välkonserverad proteinfamilj som finns i alla levande organismer som hittills undersökts. VäxAquaporins, or Major Intrinsic Proteins (MIPs), are integral proteins that facilitate transport of water and other small neutral solutes across biological membranes. They belong to a well conserved and ancient family of proteins, present in all organisms ranging from bacteria to plants and humans. The aquaporin family in plants is large, indicating complex and regulated water transport within the

There is today a need of better prediction of part geometry regarding industrial products by simulations. There is a need for better prediction of material inflow, stresses and strains and final geometry. One way to solve this could be by using a more advanced friction model. Today a zero order friction model (Coulomb friction) is normally used. By using a friction model of higher order the fricti

Abstract in German Der Widerstand in den evangelischen Kirchen Europas 1933-1945 ist ein komplexes Problem. In vielen Kirchen wurde er gegen die nationalsozialistische Ideologie oder die deutsche Besetzung geleistet. Jedoch kann das Problem nicht auf den Widerstaned gegen den Nationalsozialismus begrenzt werden. Kirchlichen Widerstand gab es auch gegen den Sowjetkommunismus, wie in Estland und Let

Adsorption dynamics of various types of uncharged homopolymers onto solid surfaces in good solvent have been studied by using a coarse grained bead-spring model. Brownian dynamics simulation has been used to examine the adsorption process for polymers released near an adsorbing surface, and Monte Carlo simulations have been employed to explore equilibrium properties of adsorbed polymers. Two diff

A numerical investigation has been carried Out for the turbulent fluid flow and heat transfer in periodic fully developed corrugated ducts. Three turbulence models are used in the calculation: the standard k - epsilon model, the Re-Normalized Group (RNG) k - epsilon model and a Reynolds Stress Model (RSM). The turbulent heat flux is modeled by the simple eddy diffusivity model (SED). The numerical