Westinghouse Electric

About: Westinghouse Electric is a company organization based out in Cranberry Township, Pennsylvania, United States. It is known for research contribution in the topics: Brake & Signal. The organization has 27959 authors who have published 38036 publications receiving 523387 citations.

Computer integrated desk

Abstract: A computer integrated desk having the VDT (visual display terminal), keyboard, disc drives and printer completely concealed within the desk when not in use and quickly convertible to a fully operable computer work station by exposing a keyboard at a central location, raising a flat screen VDT from beneath the work surface and accessing the disc drives and printer by opening a door.

Some Dynamical Properties of Surface Atoms

Abstract: Expressions for the mean-square velocity and mean-square amplitude of an atom in the surface layers of a simple cubic crystal are obtained using double-time Green's functions. They are evaluated explicitly in the high-temperature limit. The Hamiltonian of the unperturbed crystal is taken in the harmonic approximation with nearest- and next-nearest-neighbor central force interactions between the atoms. The perturbation produces free surfaces by subtracting off all the interactions (or bonds) which cross a certain plane. The exponential in the Debye-Waller factor for a surface atom, calculated to lowest order in inverse temperature, is twice as large as its bulk value for $\ensuremath{\gamma}$-ray emission perpendicular to the surface and about 30% larger than the bulk value for emission parallel to the surface. These surface corrections decay very rapidly as one goes into the crystal from the surface. In the fifth atomic layer the exponential in the Debye-Waller factor is within 5% of the bulk value. In the second-order Doppler shift the effect of the surface is to reduce the second-order term in inverse temperature (first quantum correction) by about 30%. The lowest-order term is unaffected. If the crystal is made isotropic in the long wavelength, continuum limit surface waves which are the classical Rayleigh waves appear.

Development and Testing of an Electro-Mechanical Relay to Detect Fallen Distribution Conductors

Abstract: If undetected by phase or ground overcurrent relaying methods, fallen distribution conductors or high impedance faults may be a fire hazard and a threat to public safety. Four promising relay schemes to detect these faults are evaluated using both digital and analog techniques and one scheme was chosen for prototype construction. In the light of economic and performance data, a prototype Ratio Ground Relay has been constructed for installation and testing on six Pennsylvania Power and Light distribution feeders.

Random Hazard in Reliability Problems

Abstract: A class of models for system reliability is presented which (a) introduces the notion of random variability of environment, and hence of instantaneous failure rate or “hazard,” (b) leads to exponentially distributed system time to failure, and to exponentially distributed component time to failure when components are exposed to the environment in isolation, but (c) does not lead to a prediction of series system failure rate based on the usual procedure of adding component failure rates. If the usual procedure is followed, it is shown that underestimates of system reliability are obtained. A simple spares provisioning problem is investigated when such a model is assumed to hold.