Photoluminescence is measured in n-type ZnSe doped with Ga and Cl under pressures to 100 kbar (at 7 K). For each dopant, the rate of pressure shift of the self-activated band changes at 25–30 kbar from faster than to slower than that of the band gap. The change is evidence that a previously unknown deep donorlike state emerges from the electron continuum. This state probably is related to zinc ...

introduction increase in alpha band is observed when blood perfusion in frontal area of head decreases. the present study evaluated some changes in the alpha band particularly, alpha-1 of frontal and central areas of the head, when several areas were exposed simultaneously to magnetic field. materials and methods five points of head (f3, f4, cz, t3, and t4) of twenty healthy male participants w...

alzheimer’s disease (ad) is a uniquely human disorder. although the pathogenesis of ad is not fully understood, growing evidence indicates that the deposition of beta-amyloid (aβ) and the local reactions of various cell types to this protein play major roles in the development of the disease. in the present study transgenic mice expressing mutant amyloid precursor protein (app) has been used. t...

PURPOSE Band erosion is a well-known complication of laparoscopic adjustable gastric band placement. We gained experience with laparoscopic removal of an eroded gastric band. METHODS We retrospectively reviewed the operative log of our obesity surgery unit to identify all operations performed for band erosion from March 2009 to May 2011. RESULTS During the study period, a total of six of 96...

Iliotibial band syndrome (ITBS) is the second most commonly reported overuse running injury [1]. The iliotibial band is a thickened lateral component of the tensor fasciae latae [2]. This band of dense fibrous connective tissue traverses down the lateral thigh and passes over the lateral femoral epicondyle before inserting onto the anterolateral aspect of the tibia [2]. Until recently, it was b...

Statistics for atmospheric-noise-temperature data at a 31.4-GHz frequency were calculated for the Madrid and Goldstone Deep Space Communications Complexes from the data collected by the water vapor radiometer. These data consist of 74 months of measurements at Madrid and 46 months of measurements at Goldstone. The statistics then were used to optimize a deep-space 32-GHz (Ka-band) link at each ...

A fully-integrated Multi-Band PA using 0.25 μm SiGe:C process with an output power of above 25 dBm is presented. The behaviour of the amplifier has been optimized for multi-band operation covering, 2.4 GHz, 3.6 GHz and 5.4 GHz (UWB-WiMAX) frequency bands for higher 1-dB compression point and efficiency. Multi-band operation is achieved using multi-stage topology. Parasitic components of active ...

Specifications: The goal of the project is to design a quadrature downconverter (QD) that will demodulate an intermediate frequency (IF) signal in the range from 100MHz to 400MHz to base band. There will be a total of 14 QD boards for 7 beams, 2 polarizations per beam, coming from Galactic Arecibo L-band Feed Array (GALFA). The power of the IF signal will be in the range from -25dBm to -10dBm (...

Recently high-resolution space-borne synthetic aperture radar (SAR) systems with various polarizations have been launched and operated successfully. Data acquired by these systems have shown good results for various geodetic interferometric SAR (InSAR) applications [1-5]. In this study we evaluate the coherences characteristics of high-resolution data acquired by TerraSAR-X (X-band), ALOS (L-ba...