다중혈관 관상동맥 환자에서 y-문합을 이용하여 양쪽 내흉동맥만을 사용한 우회술의 조기 성적

We present a comprehensive and up-to-date compilation of band parameters for all of the nitrogen-containing III–V semiconductors that have been investigated to date. The two main classes are: (1) “conventional” nitrides (wurtzite and zinc-blende GaN, InN, and AlN, along with their alloys) and (2) “dilute” nitrides (zinc-blende ternaries and quaternaries in which a relatively small fraction of N is added to a host III–V material, e.g., GaAsN and GaInAsN). As in our more general review of III–V semiconductor band parameters [I. Vurgaftman et al., J. Appl. Phys. 89, 5815 (2001)], complete and consistent parameter sets are recommended on the basis of a thorough and critical review of the existing literature. We tabulate the direct and indirect energy gaps, spin-orbit and crystal-field splittings, alloy bowing parameters, electron and hole effective masses, deformation potentials, elastic constants, piezoelectric and spontaneous polarization coefficients, as well as heterostructure band offsets. Temperature an...

Band parameters for nitrogen-containing semiconductors

Thank you for reading principles of optics electromagnetic theory of propagation interference and diffraction of light. As you may know, people have search hundreds times for their favorite novels like this principles of optics electromagnetic theory of propagation interference and diffraction of light, but end up in harmful downloads. Rather than enjoying a good book with a cup of coffee in the afternoon, instead they are facing with some infectious bugs inside their computer.

Principles Of Optics Electromagnetic Theory Of Propagation Interference And Diffraction Of Light

Electronic Textiles (e-textiles) are fabrics that feature electronics and interconnections woven into them, presenting physical flexibility and typical size that cannot be achieved with other existing electronic manufacturing techniques. Components and interconnections are intrinsic to the fabric and thus are less visible and not susceptible of becoming tangled or snagged by surrounding objects. E-textiles can also more easily adapt to fast changes in the computational and sensing requirements of any specific application, this one representing a useful feature for power management and context awareness. The vision behind wearable computing foresees future electronic systems to be an integral part of our everyday outfits. Such electronic devices have to meet special requirements concerning wearability. Wearable systems will be characterized by their ability to automatically recognize the activity and the behavioral status of their own user as well as of the situation around her/him, and to use this information to adjust the systems' configuration and functionality. This review focuses on recent advances in the field of Smart Textiles and pays particular attention to the materials and their manufacturing process. Each technique shows advantages and disadvantages and our aim is to highlight a possible trade-off between flexibility, ergonomics, low power consumption, integration and eventually autonomy.

/pdf/wearable-electronics-and-smart-textiles-a-critical-review-2oa10tsfxp.pdf

Wearable Electronics and Smart Textiles: A Critical Review

Expert systems applications

The paper presents an efficient technique to evaluate the noise of bipolar or monopolar devices by means of the Impedance Field Method, implemented through a two-carrier drift-diffusion (DD) multidimensional numerical model. The approach, based on Branin's method for the noise analysis of networks, extends the adjoint approach already proposed for monopolar noise analysis. Preliminary results are presented on the analysis of pn junction diodes and FET's.

A novel implementation of noise analysis in general-purpose PDE-based semiconductor device simulators

Fabrication and nonlinear load-pull characterization of GaN HEMT on SiC for High power applications

Diamond is in principle the highest performance widegap semiconductor; its outstanding electronic and thermal properties make it an attractive material for high power radiofrequency (RF) and microwave electron devices. Even though the properties of synthetic diamond have been known from many years, only recently significant technology advances in the growth of single-crystal and polycrystalline diamond have fostered the research on high-performance diamond electronics. In this framework, the use of polycrystalline diamond as a substrate offers the advantage of larger areas and lower cost with respect to single-crystal diamond. Available approaches for the control of diamond conductivity rely mainly (up to now) on p-type doping, either through extrinsic doping with boron, or exploiting hydrogen (H) surface termination, which induces a quasi-2D hole channel a few nanometers below the surface. Both approaches have been pursued to develop high speed power FETs [1], with record cut-off frequency (45 GHz) achieved by H-terminated FETs on polycrystalline diamond [2]. Despite such promising small-signal performances, only a few examples of RF power measurements have been reported so far, limited at comparatively low frequency (1 GHz), and only for single-crystal diamond FETs, with record performance of 2W/mm [3]. In this paper, we present RF power measurements of submicron H-terminated FETs on polycrystalline diamond up to 2 GHz, showing the potential of such substrate for the development of microwave power devices.

RF power performance of submicron MESFET on hydrogen terminated polycrystalline diamond

The paper presents a detailed analysis of the conversion phenomena observed in trap‐assisted low‐frequency noise conversion in forced large‐signal device operation The discussion is based on a drift‐diffusion physical model, with stationary and cyclostationary noise analysis capabilities In particular, we show that in a semiconductor diode, traps located in a resistive area yield terminal fluctuations whose frequency conversion is milder than in the case of traps in the depletion region This leads to a different frequency dependence for noise at the baseband or near the fundamental frequency

Key issues in trap‐assisted low‐frequency device noise simulation in nonlinear large‐signal conditions

A large-signal lumped-parameter model for pseudomorphic HEMT devices (P-HEMTs) is described. The model was implemented in the HARPE/OSA environment on the basis of the Angelov approach and further developed through comparison with three generations of SIEMENS P-HEMTs; an MDS version is also available. The final model shows very good agreement with experimental data for the DC and small-signal parameters on a wide range of bias points; preliminary comparisons carried out on large-signal measurements are also satisfactory.

An improved P-HEMTP large-signal model for medium-power Ka-band amplifiers

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