We report on the status of our search for Xray afterglows of gamma-ray bursts (GRBs) using the ROSAT all-sky survey (RASS) data. The number of potential X-ray afterglow candidates with respect to the expected number of beamed GRBs allows to constrain the relative beaming angles of GRB emission and afterglow emission at about 1-5 hrs after the GRB.

On examination, the epigastrium was tender but no mass was palpable. Investigations for his epigastric pain showed normal levels of serum amylase, normal electrocardiograph, normal erect abdominal and chest Xray. Further tests done included abdominal ultrasound that showed hyperechoic lesion in the gallbladder, suggestive of a polyp. The liver, spleen and pancreas were reported as normal. OGDS ...

This article describes the novel possibility of the polyester (polyethylene terephthalate) surface modification by plasma treatment. Moreover, this modified polyester could be component for the composite material (with hyaluronic acid) used in the wound healing. In this study, the experimental methods: FT-IR spectroscopy, the contact angle measurement, Xray photoelectron spectroscopy and scanni...

A half-plane probe through a polygon measures the area of intersection between a half-plane and the polygon. We dev elop techniques based on xray probing to determine convex n-gons in 7n + 7 half-plane probes. We also show n + 1 half-plane probes are sufficient to verify a specified convex polygon and prove linear lower bounds for determination and verification.

 The crystal structure of two B-type carbonated apatite samples was re-analyzed, using the data of Wilson et al (2006). By applying the least squares method for the determination of carbon and oxygen atoms, a slightly different result was obtained, suggesting that the carbonate ion is not rigorously planar. Keywords Carbonated apatite, Carbonate, Xray diffraction.

in this article vanadium boride nanopowder was synthesized by mechanochemical reduction method in a high-energy ball mill. the synthesized powders were studied by x-ray diffraction (xrd), scanning electron microscopy (sem), xray map and transmission electron microscopy (tem). according to x-ray diffraction the product predominantly consists of vb phases after 100 min milling without further hea...

the reaction of [pphj, nos,] with cucl and kscn (1 :3:3) in acetone produces the yell-ow crystals of [pph,], [wos,(cuncs),]. the crystals are triclinic, space group p1(2), z=2, a=12.4823(7), b=12.9224(7), c=18.6395(10)?, ?=83.907(5), ?= 73.152(4), y= 65.194(4)'. the crystal structure was determined by single crystal xray diffraction methods (mo-k ?) and refined by least-squares calculation...

Over the last two decades, advances in the understanding of arrhythmia mechanism and catheter design have resulted in a high degree of success for the cure of regular narrow complex tachycardias. Extension of the principles and techniques of conventional electrophysiology (EP) to more complex arrhythmias such as atrial fibrillation (AF), atypical left atrial flutters and scar-related ventricula...

The high-resolution X-ray CT was applied to investigate the fatigue damage evolution of asphalt mixtures. detailed Xray images in centre samples were used characterise cracking and air voids increase at different vertical deformations. Air void content surface area distribution before after loading also analysed. results show that main failure mode mixtures low temperature is debonding interfac...

In this study, Boron carbide was synthesized using Mesoporous Carbon CMK-1, Boron oxide, and magnesiothermic reduction process. The Effects of temperature and magnesium grain size on the formation of boron carbide were studied using nano composite precurser containg mesoporous carbon. Samples were leached in 2M Hydrochloric acid to separate Mg, MgO and magnesium-borat phases. SEM, XRD and Xray ...