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Displaying 57776 - 57800 of 74189

Problems and progress in the measurement of reference mass spectra

May 29, 1994
Author(s)
C L. Clifton, Anzor I. Mikaia, Stephen Stein
Compounds of interest and their availability as well as purity of the samples in the market are discussed. Difficulties in acquiring samples of common chemicals are noted. Sample preparation procedures for GC-MS analysis along with the instrumental

Beam-to-Column Connections for Precast Concrete Moment-Resisting Frames

May 16, 1994
Author(s)
Geraldine S. Cheok, William C. Stone, J Stanton, D Seagren
Precast concrete frame construction is not used extensively in seismic regions of the USA. The UBC [ICBO, 1991] currently permits only certain specific building systems to be used and a precast frame is not one of them. The reason is that extensive

Acid Gas Production in Inhibited Diffusion Flames

May 3, 1994
Author(s)
Gregory T. Linteris, M D. King, A Liu, C A. Womeldorf, Y. E. Hsin
The proposed replacements to halon 1301, mainly fluorinated and chlorinated hydrocarbons, are expected to be required in significantly higher concentrations than CF3Br to extinguish fires. At these higher concentrations the by-products of the inhibited

A Monte Carlo Model for SEM Linewidth Metrology

May 1, 1994
Author(s)
J R. Lowney, Michael T. Postek, Andras Vladar
A scanning electron microscope (SEM) can be used to measure the dimensions of the microlithographic features of integrated circuits. However, without a good model of the electron-beam / specimen interaction, accurate edge location cannot be obtained. A

An Instrument for Calibrating Atomic Force Microscope Standards

May 1, 1994
Author(s)
J Schneir, T Mcwaid, Theodore V. Vorburger
To facilitate the use of AFMs for manufacturing we have initiated a project to develop and calibrate artifacts which can in turn be used to calibrate a commercial AFM so that subsequent AFM measurement are accurate and traceable back to the wavelength of

An Update Guide for HAZARD I Version 1.2

May 1, 1994
Author(s)
Richard D. Peacock, Walter W. Jones, Glenn P. Forney, Paul A. Reneke, Richard W. Bukowski, J H. Klote
A method for quantifying the hazards to occupants of buildings from fires, and the relative contribution of specific products (e.g., furniture, wire insulation) to those hazards is presented. This method,called HAZARD I, combines expert judgment and
Displaying 57776 - 57800 of 74189
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