A low noise, low power, radiation hard, full custom integrated circuit has been studied for coupling with photodetectors of the CMS electromagnetic calorimeter. A new version of the prototype preamplifier has been designed with improved performances (noise, dynamic range, consumption). Irradiation tests on this monolithic circuit have been performed at CERN with a Xray SEIFERT RP149 generator u...

Our natural language understanding system outputs a list of diseases, findings, and appliances found in a chest x-ray report. The system described in this paper links those diseases and findings that are causally related. Using Bayesian networks to model the conceptual and diagnostic information found in a chest xray we are able to infer more specific information about thefindings that are link...

Microstructures of high copper commercial amalgams containing varying amounts of mercury, ranging from 20% above to 25% below recommended values, were primarily investigated by xray diffraction. Mechanisms relating to the absence or presence of 72 (Sn-Hg) phase in these amalgams were discussed in relation to the presence of copper and tin elements in their original alloys. The optimum mercury c...

The accuracy and interobserver variability of roentgenographic analysis for cardiac size in patients dying with chronic bronchitis and pulmonary emphysema were correlated with pathologic data derived from special studies. Three trained observers were able to accurately and consistently diagnose chronic bronchitis and pulmonary emphysema and to detect cardiomegaly on the chest xray film. The bes...

A new cobalt(III) complex salt, [cis-Co(en)2(C8H7O2)2](C8H7O2) Æ 2H2O, has been synthesized and characterized by single crystal Xray structure determination. This is the first example of a cobalt(III) compound of this type with two p-methylbenzoate groups in cisconfiguration. The cations and anions are associated in chains by strong NH . . . O hydrogen bonds. The crystal lattice is stabilized b...

Optical spectroscopic studies of emission lines in black-hole candidates can help us investigate state transitions in those systems. Changes in the optical line profiles reflect changes in the geometry of the accretion flow, usually associated with Xray state transitions in the inner region. We identify at least four optical states in the black-hole candidate GRO J1655−40 in outburst, and two o...

A discussion of the Monte Carlo methods for the Ising model highlights the benefits of the Swendsen-Wang algorithm. Next, an a priori model that has been developed for the analytical reconstruction of crystal structures from xray crystallography data is discussed, and the feasibility of developing an algorithm for this model similar to the Swendsen-Wang algorithm is considered. Thesis Superviso...

This paper presents two origami inspired concepts for sunshields for a deployable Xray space telescope. Analytical models of the fold layout and sunshield deployment have been derived, and these models have been used to match the sunshield design to a set of geometric constraints. To validate the design, a proof-of-concept physical model of the optimized analytical design was constructed at 1:1...

The copolymer metal complexes in the form of imprinted polymers were prepared from Poly (vinyl alcohol) (PVA), Acrylic acid (AAc), Acrylamide (AAm) and 2-Acrylamido-2methyl propane sulfonic acid (AMPS) monomers irradiated in presence of different metal ions and crosslinking agent. Characteristics and some properties of the prepared imprinted and grafted polymers were investigated. Also the poss...

Frequency-chirped free-electron lasers (FELs) are useful to generate a large photon bandwidth or a shorter xray pulse duration. In this paper, we present a threedimensional analysis of a high-gain FEL driven by the energy-chirped electron beam. We show that the FEL eigenmode equation is the same for a frequency-chirped FEL as for an undulator-tapered FEL. We study the transverse effects of such...