Photoresponse of high resistivity cadmium telluride between room temperature and 400°C

The behavior of CdTe as an infrared photodetector to operate at 400°C over the range between 0.8 and 1.2 μ was studied. It was shown that chlorine-doped CdTe indeed can be prepared to possess signal-to-noise ratios at 400°C of 50:1 at 50 μW/cm² of illumination with a 1 kHz bandwidth. Furthermore, iridium has proven to be a stable contact, and 1000-hr life tests of Ir-contacted CdTe chips in hermetically sealed, gas filled T08 transistor headers showed no significant variations in the signal-to-noise ratios.     

Application of a wide area backup protection expert system toprevent cascading outages

A strategy to prevent cascading outages in power systems is proposed in this paper. The strategy employs wide-area backup protection and artificial intelligence techniques to minimize the impact of a fault on a network. There are two ways in which wide-area backup protection can prevent cascading trips leading to a wide spread blackout: (1) precise location of a fault so that only the circuit breakers necessary to isolate the fault are tripped, and (2) avoidance of unnecessary trips, due to hidden failure or overloading, by blocking the trip signals of conventional backup protection relays. The limitations of conventional backup protection are examined and methods of improvement are presented     

The effect of iodine-containing x-ray contrast media on water status in the blood plasma

The impact of radio-opaque agents on human blood plasma water pool was studied by using relaxation proton magnetic resonance methods with a pulse gradient of magnetic field. The findings suggest that blood plasma water imbalance was induced by human serum albumin dehydration processes after RCN-HSA interaction.