Nonequilibrium dc and large-signal ac vertical electron transport in GaN/AlGaN heterostructures is investigated by Monte Carlo simulations. The symmetric two-barrier GaN/AlGaN heterostructures are studied. The results of simulations show that polarization charges have a profound effect on dc and large-signal ac characteristics of vertical electron transport in GaN/AlGaN heterostructures. Under ...

Platinum/ruthenium/nitrogen doped diamondlike carbon PtRuN-DLC thin films were deposited on p-Si 100 substrates with dc magnetron cosputtering by varying the dc power applied to a Pt50Ru50 target to investigate the effect of Pt and Ru incorporation in the films on the bonding structure, adhesion strength, surface morphology, and corrosion behavior of the films by means of X-ray photoelectron sp...

3.1 Meaningful Animal Studies of tDCS and the Quasi-Uniform Assumption .... 56 3.1.1 Classification of Animal Studies ........................................................ 56 3.1.2 tDCS Dose in Human and Animals, and the Quasi-Uniform Assumption ........................................................................ ................ 58 3.1.3 Stimulator and Electrode Techniques, and Nomencla...

A field-heating (FH), field-cooling (FC), zero-field heating (ZFH) sequence was used to study nonergodic polarization response to dc electric field in x4.28 Rb,-,(ND4),D2As04 (DRADA) deuteron glass. Polarization change in the low-temperature nonergodic region varied with temperature T nearly as Ty, where 5SyS6. This result is compared with predictions of the bound charge semiconductor model for...

The MUC1 transmembrane mucin is expressed on the surface of activated human T cells; however, the physiologic signals responsible for the regulation of MUC1 in T cells are not known. The present studies demonstrate that IL-7, but not IL-2 or IL-4, markedly induces MUC1 expression on CD3+ T cells. MUC1 was also up-regulated by IL-15, but to a lesser extent than that found with IL-7. The results ...

Microstructure and corrosion performance of admiralty brass (ADB) and aluminum brass (ALB) alloys after passing different annealing heat treatments were investigated using optical and scanning electron microscope, energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), DC polarization measurements and electrochemical impedance spectroscopy (EIS). The results showed that heat tre...

We recently demonstrated a polarization technique that eliminates the frequency drift due to dielectric charge in MEMS oscillators [1]. In this work we show that these oscillators are also firstorder insensitive to low-frequency voltage noise, with potential for significant positive impact on predicted close-to-carrier phase noise performance. Close-to-carrier noise also determines the limits o...

The dc electric-field dependence of the relative dielectric constant «r(E) in polar dielectrics is studied. The Landau-Ginzburg-Devonshire ~LGD! theory and its approximate treatments in dealing with «r(E) are reviewed. It is found that the LGD theory works well in the case of a single polarization mechanism existing in the dielectrics, and the Johnson relation «r(E)5«r(0)/$11l@«0«r(0)# E% is a ...

The integration of micro/nanofluidic devices led to many interesting phenomena and one of the most important and complex phenomenon among them is concentration polarization. In this paper, we report new physical insights in micro/nanofluidic interface devices on the application of ac and dc electric fields. By performing detailed numerical simulations based on the coupled Poisson, Nernst–Planck...