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NIST Authors in Bold

Displaying 46651 - 46675 of 73460

New Primary Standard for Specular Gloss Measurements

December 1, 2000
Author(s)
Maria E. Nadal, E A. Thompson
The measurement of specular gloss consists in comparing the luminous reflectance from a specimen to that from a calibrated gloss standard, under the same geometric conditions. The standard recommendations for the gloss standard are discussed. A new primary

NIST and Strategic Standardization

December 1, 2000
Author(s)
JoAnne R. Overman
NIST's Office of Standards Services coordinates Federal government standards activities under the National Technology Transfer and Advancement Act and chairs the Interagency Committee on Standards Policy. Through these and other Office activities, NIST

NIST Centennial Celebration - Crystallographic Highlights

December 1, 2000
Author(s)
Winnie K. Wong-Ng, Alan D. Mighell, Gabrielle G. Long, Leonid A. Bendersky, Vicky L. Karen, J D. Barnes, G L. Gilliland, T Gallagher, Terrell A. Vanderah, R G. Munro, Paul E. Stutzman, H F. McMurdie, S Block, Gasper J. Piermarini, Robert S. Roth, Antonio Santoro, Curt W. Reimann, C R. Hubbard, John W. Cahn, E Prince, D R. Lide, H Ondik, Lawrence P. Cook, T Siegrist, G DeTitta, L Finger, H Evans, E Gabe, G Enright, J T. Armstrong, M Levenson, Laurence C. Chow, Shozo Takagi, M Mathew, Jeffrey W. Lynn, H S. Peiser
NIST has a long history of crystallographic research, and has made significant contributions to the advancement of the fields of crystallography, biology, and materials science. The articles are contributed by scientists from various divisions at NIST, and

Non-collinear Exchange Coupling in Fe/Mn/Fe(001): Insight from Scanning Tunneling Microscopy

December 1, 2000
Author(s)
Daniel T. Pierce, Angela Davies, Joseph A. Stroscio, D Tulchinsky, John Unguris, Robert Celotta
The film growth and morphology of epitaxial Mn films grown on Fe(001) single crystal whiskers measured with scanning tunneling microscopy (STM) provides insight into the mechanism of interlayer exchange coupling in Fe/Mn/Fe(001) trilayers. The proximity

Optical Frequency Measurement: 40 Years of Technology Revolutions

December 1, 2000
Author(s)
J L. Hall
The past forty years have witnessed spectacular progress in precision measurements, beginning with the first coherent optical source, the HeNeCW laser, demonstrated in late 1960 by A. Javan. B. Bennett, and D. Herriott, at Bell Laboratories. Almost

Optimization of an Annular Jet Commercial Gas-Metal Atomizer

December 1, 2000
Author(s)
Stephen D. Ridder, Aaron N. Johnson, Pedro I. Espina, Frank S. Biancaniello, G J. DelCorso
The performance of a commercial gas-metal atomizer was studied using a number of previously published research techniques. initially the flow was visualized using schlieren photography to determine the location of important flow features (e.g., shock waves

Preparation and Certification of K-411 Glass Microspheres

December 1, 2000
Author(s)
Ryna B. Marinenko, S V. Roberson, J S. Small, Barbara B. Thorne, Douglas H. Blackburn, D Kauffman, Stefan D. Leigh
The production and characterization of NBS K-411 glass microspheres in the 3-40 um range for certification as a NIST Standard Reference Material (SRM) are described. EDS quantitative analysis and heterogeneity evaluations of the microspheres were made with

Radiated Power Measurements in Reverberation Chambers

December 1, 2000
Author(s)
Galen H. Koepke, John M. Ladbury
The electromagnetic reverberation chamber is widely used as a test facility to generate complex fields for interference and compatibility measurements. The chamber is also effective as a method to quantify the total radiated power from an emitter

Reduction of Cobalt and Iron Phthalocyanines and the Role of the Reduced Species in Catalyzed Photoreduction of CO 2

December 1, 2000
Author(s)
J Grodkowski, T Dhanasekaran, Pedatsur Neta, P Hambright, Bruce S. Brunschwig, K Shinozaki, E Fujita
The role of cobalt and iron phthalocyanines in catalytic CO 2 reduction has been studied. Chemical, photochemical, and radiolytic reductions of the metal phthalocyanines (Pc) have been carried out in organic solvents, and reduction of their tetrasulfonated

Repair of oxidative DNA damage in Drosophila melanogaster: identification and characterization of dOgg1, a second DNA glycosylase activity for 8-hydroxyguanine and formamidopyrimidines

December 1, 2000
Author(s)
C. Dherin, M. Dizdaroglu, H. Doerflinger, S. Boiteux, J. P. Radicella
In Drosophila, the S3 ribosomal protein has been shown to act as a DNA glycosylase/AP lyase capable of releasing 8-hydroxyguanine (8-OH-Gua) in damaged DNA. Here we describe a second Drosophila protein (dOggl) with 8-OH-Gua and abasic (AP) site DNA repair

SIM Comparison of Electrical Units

December 1, 2000
Author(s)
Harold Sanchez, J. Cioffi, H. Laiz, D. Bennett, H. Ferreira, R. Ortega, Nile M. Oldham, Mark E. Parker
An international comparison of dc and low-frequency electrical units conducted between 19 laboratories in 16 countries in the Americas is described. The comparison was conducted between 1997 and 1999 and sponsored by the Interamerican Metrology System and

Simultaneous Measurement of Group and Phase Delay Between Two Photons

December 1, 2000
Author(s)
D A. Branning, Alan L. Migdall, A V. Sergienko
We report on an experiment to determine both the group and phase delays experienced by orthogonally polarized photon pairs travelling through a birefringent medium. Both types of delay are determined from the same set of coincidence-counting data. The

Small-Angle Neutron Scattering Measurements of Nanoscale Lithographic Features

December 1, 2000
Author(s)
Wen-Li Wu, Eric K. Lin, Q Lin, M Angelopoulos
The continuing decrease in feature sizes in the semiconductor and other nanofabriation industries has placed increasingly stringent demands on current microscopy-based techniques to precisely measure both the critical dimensions and the quality (i.e. line
Displaying 46651 - 46675 of 73460
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