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Displaying 63126 - 63150 of 74223

Exchange Asymmetry in Elastic Scattering of Electrons by Sodium Atoms

April 1, 1988
Author(s)
D H. Oza
Calculations of the exchange asymmetry in elastic scattering of electrons by sodium atoms are reported at incident electron energies of 10 and 54.4 eV. The close-coupling calculations are performed with the four lowest target states of the sodium atom. At

Experimental Evaluation of Two Refrigerant Mixtures in a Breadboard Air Conditioner

April 1, 1988
Author(s)
W. J. Mulroy, M Kauffeld, Mark O. McLinden, David Didion
An experimental, water-to-water, breadboard heat pump (that is one designed to be easily reconfigured) was constructed for comparison of pure R22 to the refrigerant mixtures R22/R114 and R13/R12. three evaporator configurations were extensively studied. In

Guide to Auditing for Controls and Security: A System Development Life Cycle Approach

April 1, 1988
Author(s)
Zella G. Ruthberg, Bonnie T. Fisher, William E. Perry, John W. Lainhart, James G. Cox, Mark Gillen, Douglas B. Hunt
This guide addresses auditing the system development life cycle (SDLC) process for an automated information system (AIS), to ensure that controls and security are designed and built into the system. The guide also presents a process for deciding which

Process Planning for a Milling Machine From a Feature-Based Design

April 1, 1988
Author(s)
Thomas R. Kramer
In the Vertical Workstation (VWS) of the NBS Automated Manufacturing Research Facility, metal parts are machined automatically from a feature-based design. A simple two-and-a- half dimensional part may be designed and machined within an hour, allowing half

Cone Calorimeter Evaluation of the Flammability of Composite Materials.

March 1, 1988
Author(s)
James E. Brown, E Braun, W H. Twilley
A study was undertaken to evaluate the fire performance of composite materials using the cone calorimeter as the bench-scale method of test simulating the thermal irradiance from fires of various magnitudes. Five parameters were derived from the

Cool It!

March 1, 1988
Author(s)
John H. Lehman
Displaying 63126 - 63150 of 74223
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