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Boundary conditions in the envelope function approximation as applied to semiconductor heterostructures

We have found the equations that determine the self-adjoint extensions, and thus the boundary conditions, of the differential operator used in the multi-band k·p-theory, when the coefficients in the Kane-matrix are piecewise constant. Both the one-dimensional and the three-dimensional case have been investigated. Numerical simulations of the energy eigenvalues in a quantum well has been performed,

On-line Mobile in situ Gamma Spectrometry

Popular Abstract in Swedish I beredskapen för kärnolyckor är mobila in situ gammaspektrometriska mätningar ett viktigt redskap; vilket betyder att mätinstrument placeras i ett fordon (tex bil, flygplan eller helikopter) och gammastrålningen från omgivningen mäts under körning. I detta arbete har strategier och analysmetoder för två olika användningsområden utvecklats: 1) sökning av försvunna radioMobile in situ gamma spectrometry is an important instrument in the emergency preparedness for nuclear accidents. This work contributes through the development of strategies and analysis methods for two applications: an on-line search for gamma-emitting orphan sources and on-line estimation of the depth distribution of 137Cs. A strategy and analysis method dedicated to the detection of orphan sour

SAR studies of Capsazepinoid Bronchodilators The B-ring and the C-region

Popular Abstract in Swedish Astma och rökarsjuka, eller mer korrekt kronisk obstruktiv lungsjukdom (KOL), är två vanliga sjukdomar som karakteriseras av att de drabbade tidvis har svårt att andas. Denna andnöd orsakas av att luftvägarna drar ihop sig. Mediciner som motverkar detta och istället vidgar luftvägarna är därför viktiga för patienter som lider av astma eller KOL. Det finns idag flera medCapsazepine and similar compounds, capsazepinoids, were shown to be general inhibitors of agonist (leukotriene D4, histamine, acetylcholine, prostaglandin D2) evoked constriction of human small airway preparations. The mechanism of action remains to be elucidated, but established bronchodilator principles, e.g. beta2-adrenoceptor agonism, as well as TRPV1 antagonism were shown to be less likely. F

Scheduling of Conditional Process Graphs for the Synthesis of Embedded Systems

We present an approach to process scheduling based on an abstract graph representation which captures both data-flow and the flow of control. Target architectures consist of several processors, ASICs and shared busses. We have developed a heuristic which generates a schedule table so that the worst case delay is minimized. Several experiments demonstrate the efficiency of the approach.

Convergence rate of agents' learning in macroeconomic models

This paper discusses agents7 learning on a market. The price level evolves through a multivariable autoregressive model, which the agents learn in a least-squares sense. A theorem is stated that shows how the agents7 learning might be divided into two classes with respect to the learning convergence rate. The results are exemplified by the well-known hyperinflation model. Further, for the hyperinf