The amount of generation located in distribution networks has been increasing worldwide in recent years. According to WADE [1] the actual share of decentralized power in the world market is about 7 % and it is expected to continue growing. Distributed generation (DG) has many potential benefits including the reduction of line losses, deferral of investments in transmission and distribution netw...

We dope CdSe nanocrystals with Ag impurities and investigate their optical and electrical properties. Doping leads not only to dramatic changes but surprising complexity. The addition of just a few Ag atoms per nanocrystal causes a large enhancement in the fluorescence, reaching efficiencies comparable to core-shell nanocrystals. While Ag was expected to be a substitutional acceptor, nonmonoton...

We propose to create ultracold ground state molecules in an atomic Bose-Einstein condensate by adiabatic crossing of an optical Feshbach resonance. We envision a scheme where the laser intensity and possibly also frequency are linearly ramped over the resonance. Our calculations for (87)Rb show that for sufficiently tight traps it is possible to avoid spontaneous emission while retaining adiaba...

In a recent paper, Guillemoles et al. attempt to clarify and explain the often cited paper by Shockley Queisser2 (SQ), which defines limits photovoltaic conversion single-junction solar cell. The SQ is not easy read therefore easily misunderstood. As modern cells approach theoretical efficiency limits, fundamentals become particularly important effort be welcomed. However, in doing so, authors ...

The formulas of cost and allocative efficiencies of decision making units (DMUs) with positive data cannot be used for DMUs with negative data. On the other hand, these formulas are needed to analyze the productivity and performance of DMUs with negative data. To this end, this study introduces the cost and allocative efficiencies of DMUs with negative data and demonstrates that the introduc...