Imaging collective effects

Realization of Collective Effects in Sensing and Imaging Technologies. 124... 

Deconvolution microscopy achieves the same Image-sharpening effect as confocal scanning microscopy but through a different process. In this method, Images from consecutive focal planes of the specimen are collected. A separate focal series of images from a test slide of subresolution size (i.e., 0.2 (jim diameter) bead are also collected. Each bead represents a pinpoint of light that becomes an object blurred by the imperfect optics of the microscope. Deconvolution... 

PCT data are analyzed at an imaging workstation. Post-image-collection processing involves semi-au-tomated definition of an input artery and a vein. In acute stroke patients, selection of different arterial inputs has been demonstrated to have no significant effect on PCT results for an individual patient (Wintermark et al. 2007a). As a result, we routinely use the anterior cerebral artery as the arterial input function to provide standardization and facilitate intersubject comparison. In patients with chronic cerebral vascular disease, the situation is different, and we select for each vascular territory its own, specific arterial input function. 

These Schottky energy barriers are measured in the presence of an electric field in the structure which is necessary to be able to collect the photocurrent. The photocurrent thresholds are not the zero electric field Schottky barriers because of the electric field in the polymer and the image chaise potential created when the electron leaves the metal. This effect results in a lowering of the Schottky energy barrier given by [34]... 

Sowada and Warman (1982) have described a dc conductivity method for Ar gas at 295 K and 45 atm. Following a 20-ns pulse of irradiation, the conductivity rises to a peak at -50 ns, due to the Ramsauer effect, before settling to a plateau, which is ascribed to thermal conductivity since the collecting field is very low. Since there is little electron loss, the conductivity profile is proportional to the mobility profile this in turn can be considered a kind of image of collision frequency as a function of electron energy. The time to reach the conductivity plateau, -150 ns, is the measure of thermalization time in the present case. At a density of -9 X 1021 cm-3, the conductivity maximum vanishes, indicating the disappearance of the Ramsauer minimum according to Sowada and Warman. 

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