نتایج جستجو برای: break through curve btc
تعداد نتایج: 1501150 فیلتر نتایج به سال:
In this paper a colour image data compression method using block truncation coding (BTC) and genetic Algorithm (GA) is presented. This compression technique reduces the computational complexity and provides acceptable visual quality reconstructed images. BTC acts as the basic compression technique but it exhibits two disadvantages such as the false contour and blocking effect. Hence error diffu...
INTRODUCTION The worldwide incidence of biliary tract carcinoma (BTC, tumours of the bile ducts and gall-bladder) continues to rise, with the only potentially curative treatment remaining surgical resection or transplantation, possible in only a minority of patients. Late presentation and a paucity of effective treatments mandate the development of techniques for early lesion detection. AREAS...
We discuss our ongoing program of Target of Opportunity (ToO) sub-millimeter observations of gamma-ray bursts (GRBs) using the Sub-millimetre Common-User Bolometer Array (SCUBA) on the James Clerk Maxwell Telescope (JCMT). In this paper, we present all the ToO observations of GRB 030329. This was by far the brightest sub-millimeter afterglow seen to date. The flux density at 850 µm was approxim...
We report the best evidence to date of a jet break in a short gamma-ray burst (GRB) afterglow, using Chandra and Swift XRT observations of the X-ray afterglow of GRB 051221A. The combined X-ray light curve, which has three breaks, is similar to those commonly observed in Swift observations of long GRBs. A flat segment of the light curve at 0.1 days after the burst represents the first clear cas...
We test the spectral–energy correlation including the new bursts detected (mostly) by Swift with firm measurements of their redshifts and peak energy. The problem of identifying the jet breaks is discussed in the complex and multibreak/flaring X–ray light curves observed by Swift. We use the optical data as the most reliable source for the identification of the jet break, since the X–ray flux m...
We present near-infrared observations of the proposed counterpart of GRB 000301c. The K’ filter (2.1μm) light curve shows a well-sampled break in the decay slope at t ≈ 3.5 days post-burst. The early time slope is very shallow (∼ −0.1), while the late time slope is steep (−2.2). Comparison with the optical (R band) light curve shows significant differences, especially in the early time decay sl...
This paper discusses Swift observations of the -ray burst GRB 050315 (z 1⁄4 1:949) from 80 s to 10 days after the onset of the burst. The X-ray light curve displayed a steep early decay (t ) for 200 s and several breaks. However, both the prompt hard X-ray/ -ray emission (observed by the BAT) and the first 300 s of X-ray emission (observed by the XRT) can be explained by exponential decays, wit...
Background: c-MET is a proto-oncogene that encodes the tyrosine kinase receptor for hepatocyte growth factor (HGF). Activation of HGF-c-MET signaling involves cell invasiveness and evokes metastasis through direct involvement of tumor angiogenesis. However, the value of c-MET overexpression is still unknown in metastatic biliary tract cancer (BTC). Methods: We analyzed the incidence and clinico...
The main factor in the issue of safety rolling stock movement rail track is change magnitude lateral forces arising from interaction wheel with rail. dynamics changes directly depends on increase speeds curves and, especially, transition curves. To prevent sudden appearance centrifugal force, outer elevated, broadened when moving a straight line to circular curve and variable curvature r = l / ...
Organic anion (OA) transport mediates accumulation of the zwitterionic nephrotoxic cysteine S-conjugates S-dichlorovinylcysteine (DCVC) and S-chlorotrifluoroethylcysteine (CTFC) in the rabbit renal proximal tubule (RPT). Although these cysteine conjugates are nephrotoxic to the human RPT, neither the role of OA transport nor the specific OA transport pathway(s) involved in cysteine conjugate ac...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید