The effects of UVC exposure on the track etch rate Vt and the detector sensitivity V of CR-39 SSNTDs were investigated through the diameters and depths of alpha-particle tracks. Both the bulk etch rate Vb and Vt increased but V decreased. The track diameters and depths were used to derive a V function for CR-39 detectors with and without UV irradiation. © 2008 Elsevier Ltd. All rights reserved.

Large area detectors capable of operating with high detection efficiency at energies above 30 keV are required in many contemporary X-ray imaging applications. The properties of high Z compound semiconductors, such as CdTe, make them ideally suitable to these applications. The STFC Rutherford Appleton Laboratory has developed a small pixel CdTe detector with 80×80 pixels on a 250 μm pitch. Hist...

This paper proposes a novel face detection algorithm which extracts a local image structure (LIS) feature and adopts a boosting approach to construct a cascaded face detector. Due to the locality of LIS, the extracted feature is not only robust to lighting variation but also is invariant to small degrees of rotation. With this robust property a multiple-template cascaded detection algorithm has...

Ji, Zhou. Ph.D. The University of Memphis. August, 2006. Negative selection algorithms: from the thymus to V-detector. Major Professor: Dipankar Dasgupta, Ph.D. Artificial Immune Systems (AIS) is a research area of developing computational methods inspired by biological immune systems. The approach of negative selection algorithms (NSA) is one of the major models of AIS. This dissertation does ...

Backscattered electron Kikuchi patterns (BEKP) suitable for crystallographic phase analysis can be collected in the scanning electron microscope (SEM) with a newly developed charge coupled device (CCD) based detector. Crystallographic phase identification using BEKP in the SEM is unique in that it permits high magnification images and BEKPs to be collected from a bulk specimen. The combination ...

The muon energy spectra of the quasi-elastic and 1-pion production events in a LBL experiment, like K2K, are predicted to follow closely the neutrino energy spectrum, with downward shifts of the energy scale by < Q > /2M and (< Q > +M ∆ − M)/2M respectively. These predictions seem to agree with the observed muon spectra in the K2K nearby detector. The corresponding muon spectra in the faraway (...

In this study, the bulk etch rate (VB) was measured by three different methods forCR-39 with a thickness of 200µm and an area (1 × 1 cm2), where CR_39 irradiated through from Am241source energy alpha particles is 2.6MeV at angle fall perpendicular to surface CR-39 detector, detector etching (NaOH) concentration 6.25N (70 ± 1°C) showing effects formed on time periods ranging (0.25h) were photogr...