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Displaying 46301 - 46325 of 73929

CLIR Evaluation at TREC

January 1, 2001
Author(s)
Donna K. Harman, M C. Braschler, M Hess, M Kluck, C Peters, P Schauble, P Sheridan
Starting in 1997, the National Institute of Standards and Technology conducted 3 years of evaluation of cross-language information retrieval systems in the Text REtrieval Conference (TREC). Twenty-two participating systems used topics (test questions) in

Cluster Primary Ion Beam Secondary Ion Mass Spectrometry for Semiconductor Characterization

January 1, 2001
Author(s)
John G. Gillen, S V. Roberson, Albert J. Fahey, Marlon L. Walker, J Bennett, R Lareau
We are evaluating the use of polyatomic and cluster primary ion beams for characterization of semiconductor materials by secondary ion mass spectrometry using both magnetic sector and time-of-flight SIMS instruments. Primary ion beams of SF 5+, C 8- and

Cold Atomic Collisions Studied by Molecular Spectroscopy

January 1, 2001
Author(s)
C Samuelis, Eite Tiesinga, T Laue, M Elbs, H Knockel, E Tiemann
We observe bound states just below the dissociation limit and shape and Feshback resonances between the ground state hyperfine asymtotes by Raman spectroscopy on a molecular beam of sodium dimers. The rotational selectivity of a two-photon transition gives

Cold Discharge of CF3I in a Simulated Aircraft Engine Nacelle

January 1, 2001
Author(s)
Jiann C. Yang, Marc R. Nyden, Samuel L. Manzello
One of the potential candidates for halon 1301 replacement in aircraft engine nacelle and dry bay fire protection applications and fuel tank ullage inerting is trifluoroiodomethane (CF3I). Before CF3I can be considered as a potential drop-in replacement

Combinatorial Methods at NIST

January 1, 2001
Author(s)
Alamgir Karim, Eric J. Amis
New, more complex materials are increasingly in demand for applications in biotechnology, microelectronics and nanotechnology. The use of combinatorial methods -- which comprise a special set of tools and techniques -- enables scientists to conduct many
Displaying 46301 - 46325 of 73929
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