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“A high microwave performance enhancement-mode (E-mode) In0.4Ga0.6As channel metal-oxide-semiconductor

field-effect transistor (MOSFET) with a Si-doped In0.49Ga0.51P interfacial layer is fabricated. A 0.8-mu m-gate-length In0.4Ga0.6As MOSFET with a 5-nm Al2O3 dielectric layer provides a current gain cutoff frequency of 16.7 GHz and a maximum oscillation frequency of 52 GHz. A semi-empirical small-signal-parameter extraction technique accounting for the low frequency anomaly of this MOSFET device is described, which is based on on-wafer S-parameter measurements. Excellent agreement between measured and simulated scattering parameters as well as click here the physically realistic learn more circuit elements demonstrates the validity of this approach.”
“A mathematical model of ice formation in living cells during

freezing is considered. Application of appropriate averaging techniques to partial differential equations describing the dynamics of water-ice phase transitions reduces spatially distributed relations to several ordinary differential equations with control parameters and uncertainties. Such equations together with an objective functional which expresses the difference between the amount of ice in the extracellular and intracellular liquids are treated as a differential game where the aim of the control is to maximize the objective functional and the aim of the disturbance is opposite. A stable finite-difference scheme for computing the value function is developed. Based on www.selleckchem.com/products/GSK690693.html the computed value function, optimal controls are designed to produce cooling protocols ensuring simultaneous freezing inside and outside of living cells. Such a regime balances the pressures inside and outside of cells, which may prevent cells from injuring. (C) 2011 Elsevier Inc. All rights reserved.”
“In recent years, there has been a shift in the one host-one parasite paradigm with the realization

that, in the field, most hosts are coinfected with multiple parasites. Coinfections are particularly relevant when the host is a vector of diseases, because multiple infections can have drastic consequences for parasite transmission at both the ecological and evolutionary timescales. Wolbachia pipientis is the most common parasitic microorganism in insects, and as such, it is of special interest for understanding the role of coinfections in the outcome of parasite infections. Here, we investigate whether Wolbachia can modulate the effect of Plasmodium on what is, arguably, the most important component of the vectorial capacity of mosquitoes: their longevity.