Heterojunction GaN/MoSe2 has recently piqued the interest of researchers due to its exceptional electronic and optical properties. Despite this, higher rate photogenerated carrier recombination limits their technical application. Implementing a promising approach formation 2D heterostructure with vacancies may improve photocatalytic activity. By first-principles, stability, structure, propertie...

Villoglandular papillary adenocarcinoma (VGA) of cervix is an uncommon but well recognized histologic subtype of cervical adenocarcinoma which usually affects young women. Based on the favorable outcomes reported in most previous cases the tumor is generally considered to have an indolent clinical course with excellent prognosis. We present a case of a 22-year-old woman admitted at our Departme...

This paper presents the design of a new phase shifter to be used in receiver active antenna array operating range from 17 GHz 22 GHz. Beamforming is achieved by controlling signal each radiant element. In this context, shift obtained combination quadrature generator (QSG) and variable gain amplifier (VGA). work focused on VGA which has set dummy transistors keep input output impedance constant....

This paper presents an improved linearity variable-gain amplifier (VGA) in 0.18-µm CMOS technology. The lineari­ty improvement is resulted from employing a new combinational technique, which utilizes third-order-intermodulation (IM3) cancellation mechanism using second-order-intermodul­ation (­IM2) injection, and intermodulation distortion (IMD) sinking techniques. The proposed VGA gain cell co...

Photoluminescence (PL) bands in GaN associated with point defects involving nitrogen or gallium vacancy (VN VGa) are reviewed. The VN-containing defects, including the isolated VN and its complexes acceptors, often observed PL from semi-insulating responsible for green (GL2) red (the RL2 family) bands. of VGa hydrogen oxygen abundantly formed n-type grown by ammonothermal method. Some these red...

The levels of resistance to pristinamycin (Pt) and to its major constituents, pristinamycin IIA and IB (PIIA and PIB, respectively; classified as streptogramins A and B, respectively) were determined for 126 staphylococcal isolates. The results suggest tentative susceptibility breakpoints of < or = 2, < or = 8, and < or = 0.5 microgram/ml for PIIA, PIB, and Pt, respectively. Fifty-six isolates ...

conclusions given the high levels of arsenic in the rivash water sources, it is essential that a plan be devised to replace the current supply with safe drinking water. moreover, these water resources should be monitored regularly regarding the risk of contamination with arsenic. results the average arsenic levels in stations a, b, c, d, e, f, g, h, i, and j were 1.53 ± 1.03, 1.30 ± 1.07, 10.55...

This paper studies the phase and gain control dependencies of a variable amplifier (VGA) vector interpolator shifter (VIPS) within 20 GHz beamforming receiver. First, mechanisms variation in classic current-steering VGA are analyzed design techniques proposed such that gain-dependent variations (GDPV) introduced by amplifiers well balanced. Second, similar analysis is performed to evaluate GDPV...

A critical component in phased-array ultrasound receivers is the variable-gain amplifier (VGA), sometimes referred to as a time-gain control (TGC) amplifier. In this article, we examine how VGA output-referred noise and gain can have a pronounced affect on ultrasound pulsed Doppler dynamic range and sensitivity, and how the MAX2037 octal ultrasound VGA has optimized these parameters to yield th...