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Displaying 64251 - 64275 of 74348

Viscosity measurements near a critical point using a novel torsion oscillator

May 1, 1986
Author(s)
Robert F. Berg, Michael R. Moldover
A torsion-oscillator viscometer has been constructed for the measurement of the viscosity of fluids near both liquid-vapor and liquid-liquid critical points. This viscometer has a resolution of ±0.2% and operates at a low frequency (0.6 Hz) and a very low

A note on flow rate and leak rate units

April 28, 1986
Author(s)
Charles D. Ehrlich
The confusion in the literature and in the laboratory surrounding the terminology and units of gas flow rates, particularly as applied to calibrated leak artifacts, has prompted this discussion of leak rate units. Special attention is paid to conflicting

Fast Path Planning in Unstructured, Dynamic, 3-D Worlds

April 21, 1986
Author(s)
Martin Herman
Issues dealing with fast motion planning in unstructured, dynamic 3-D worlds are discussed, and a fast path planning system under the development at NBS is described. It is agued that an octree representation of the obstacles in the world leads to fast

Fast, Three-Dimensional, Collision-Free Motion Planning

April 10, 1986
Author(s)
Martin Herman
Issues dealing with fast, 3-D, collision-free motion planning are discussed, and a fast path planning system under development at NBS is described. The components of a general motion planner are outlined, and some of their computational aspects are

Mass spectrometric study of 1,2,4- and 1,3,4-oxadiazoles containing indole substituents.

April 1, 1986
Author(s)
Anzor Mikaia, Rosa Ushakova, Vladimir G. Zaikin, VI Kelarev, GA Shveikhgeimer
Under electron ionization major fragmentation pathways for indolyloxadiazoles proceed via cleavage of C-O, C-N and N-O bonds in the oxadiazole ring. Skeletal rearrangements due to a migration of aryl groups are detected for diaryl1,3,4-oxadiazoles.
Displaying 64251 - 64275 of 74348
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