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Statistical mechanics of electronic energy levels in semiconductors

It is shown, using Guggenheim's pressure ensemble that partial Gibbs free energies are the quantities determining equilibrium occupations of electronic levels and hence are the quantities that enter detailed balance relationships. It is also shown that the energy of an optical no-phonon transition between band states equals the corresponding free energy change. This is also true for transitions in

Adaptive predictive control for software systems

Self-adaptive software systems are designed to support a number of alternative solutions for fulfilling their requirements. These define an adaptation space. During operation, a self-adaptive system monitors its performance and when it finds that its requirements are not fulfilled, searches its adaptation space to select a best adaptation. Two major problems need to be addressed during the selecti

A paradigmatic discourse in the logistics discipline

Today one could argue that most of the logistics research available has a strong connection to the positivistic paradigm where there is a great emphasis on simplicity in both the research conducted and in the solutions produced. The overall ability to design, plan and control is promoted by the researchers to a great extent. Consequently, firms invest money, time and resources in solutions, based

Why do speakers accent ‘‘given’’ information?

The accenting of contextually 'given' information constitutes a problem for analyses that regard accents as correlating only with 'new' information. It will be shown that the accenting of 'given' information is explainable as resulting from general metrical well-formedness conditions on prosodic constituents. Units higher than the word are seen to obey the same metrical constraints that are presen

Ultraljudsnavigerande mobil robot för rörelsehindrade personer

Människor med grava rörelsehinder behöver hjälp för att klara av sina vardagliga sysslor såsom att klä på sig, äta, borsta tänderna, klia sig, dricka mm. De behöver också stöd för att kunna utföra ett arbete. Traditionellt är det någon eller några personl