2014 The 0.839 eV luminescence line in GaAs : Cr is generally interpreted as an internal transition in Cr2+ ion (5E-5T2) on gallium site. This interpretation does not agree with E.P.R. and far-infrared absorption results. White has proposed an interpretation as an excitonic recombination on an isoelectronic deep centre. We propose an alternative explanation in which the 0.839 eV line would be a...

Bend magnet beamline 6.3.1 at the Advanced Light Source operates from 200 eV to 2000 eV, primarily used for x-ray absorption fine structure investigations. The beamline optics consist of a compact, entrance-slitless, HettrickUnderwood type variable-line-spacing plane-grating monochromator and refocusing mirrors to provide a 25 μm x 500 μm spot at the focal point in the reflectometer end station...

Extracellular vesicles (EV) in breast milk carry immune relevant proteins and could play an important role in the instruction of the neonatal immune system. To further analyze these EV and to elucidate their function it is important that native populations of EV can be recovered from (stored) breast milk samples in a reproducible fashion. However, the impact of isolation and storage procedures ...

Electric vehicle (EV) aggregator, as an agent between the electricity market and EV owners, participates in the future and pool market to supply EVs’ requirement. Because of the uncertain nature of pool prices and EVs’ behaviour, this paper proposed a two-stage scenario-based model to obtain optimal decision making of an EV aggregator. To deal with mentioned uncertainties, the aggregator’s risk...

The temperature dependence of magneto-optical and magneto-photoconductivity measurements were carried out in the range of (200-330) K. A home made optical cryostat was used for the measurements. The measured room temperature value of the energy gap was found to be 2.211 eV. The temperature coefficient of energy gap was found to be -5.48×10-4 eV/K obtained by the optical absorption method and -4...

AIM To establish an algorithm which includes the liver stiffness (LS) and/or spleen stiffness (SS) assessed by ARFI for the prediction of significant esophageal varices-EV (at least grade 2). MATERIAL AND METHODS Our study included 145 newly diagnosed cirrhotic patients admitted in our Department between September 2009-August 2011. 62 patients (42.7%) had significant EV. We performed 10 ARFI ...

PURPOSE The definition of eccentric viewing (EV) is using non-foveal preferred retinal loci (PRL) for viewing. The purpose of the present study was to investigate the clinical effect of EV training for low vision rehabilitation in patients with central scotomas. METHODS The direction of EV was monitored in 30 low vision patients with central scotomas by moving the patient's view. The PRL was ...

The quark mass function Σ(p) in QCD is revisited, using a gluon propagator in the form 1/(k 2 + m 2 g) plus 2µ 2 /(k 2 + m 2 g) 2 , where the second (IR) term gives linear confinement for m g = 0 in the instantaneous limit, µ being another scale. To find Σ(p) we propose a new (differential) form of the Dyson-Schwinger Equation (DSE) for Σ(p), based on an infinitesimal subtractive Renormalizatio...