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Displaying 44901 - 44925 of 74400

Radiometric Measurement Comparisons at NASA's Goddard Space Flight Center: Part II. Irradiance Lamp Comparisons and the NIST Sphere Source

January 1, 2002

Author(s)

James J. Butler, B. Carol Johnson, R A. Barnes

Reaction Kinetics in Ionic Liquids as Studied by Pulse Radiolysis: Redox Reactions in the Solvents Methyltributylammonium Bis(trifluoromethyl-sulfonyl)imide and N-Butylpyridinium Tetrafluoroborate

January 1, 2002

Author(s)

D Behar, P Neta, Carl R. Schultesiz

Reactive scattering of F + HD - HF(v,J) + D: HF(v,J) nascent product state distributions and evidence for quantum transition state resonances

January 1, 2002

Author(s)

W W. Harper, S A. Nizkorodov, David Nesbitt

Real-Time Measurement of Spontaneous Antigen-Antibody Dissociation

January 1, 2002

Author(s)

S Kulin

Real-Time Measurement of Spontaneous Antigen-Antibody Dissociation

January 1, 2002

Author(s)

S Kulin, Rani Kishore, J Hubbard, Kristian Helmerson

Recommended guide for determining and reporting uncertainties for balances and scales:

January 1, 2002

Author(s)

Val Miller

Reconnaissance report on damage to engineered structures during the May 1999 Oklahoma City tornado:

January 1, 2002

Author(s)

Michael A Riley

Redox Control of the P450cam Catalytic Cycle: Effects of Y96F Active Site Mutation and Binding of a Non-Natural Substrate

January 1, 2002

Author(s)

Vytautas Reipa, M P. Mayhew, Marcia J. Holden, V L. Vilker

Spectroelectrochemical measurements are used to demonstrate that active site mutation and binding of a non-natural substrate to P450cam (CYP101) reduces the shift in the redox potential caused by substrate-binding, and thereby results in slower catalytic

Reference Lines in the Optogalvanic Spectra of Urnaium and Thorium over the Wavelength Range 604 nm to 755 nm

January 1, 2002

Author(s)

W DeGraffenreid, Craig J. Sansonetti

Refinements to the Surface Crack in Flexure Method for Fracture Toughness of Ceramics

January 1, 2002

Author(s)

George D. Quinn

The surface crack in flexure method features a small, well-defined crack commensurate in size with natural flaws in structural ceramics. Lateral cracks may interfere with the median crack causing errors in computed fracture toughness. This problem

Reflectance Calibration Standard for Optical Discs

January 1, 2002

Author(s)

Xiao Tang, Jian Zheng

An accurate method for the determination of reflectance of reference discs has been developed at NIST. The discs can be used as a traceable industry standard in the calibration of optical disc testing equipment.

Relating Laboratory and Outdoor Exposure of Coatings III. Effect of Relative Humidity on Moisture-Enhanced Photolysis of Acrylic-Melamine Coatings

January 1, 2002

Author(s)

Tinh Nguyen, Jonathan W. Martin, E Byrd, E Embree

The effects of relative humidity ranging from ~0% to 90 % on the moisture-enhanced photolysis (MEP) of a partially-methylated melamine acrylic polymer coating exposed to ultraviolet (UV) radiation at 50 oC have been investigated. The UV source was two 1000

Relating Laboratory and Outdoor Exposures of Acrylic Melamine Coatings: I. Cumulative Damage Model and Laboratory Exposure Apparatus

January 1, 2002

Author(s)

Jonathan W. Martin, Tinh Nguyen, E Byrd, E Embree, B Dickens

A cumulative damage model and a laboratory apparatus are described for linking field and laboratory photodegradation results and for predicting the service life of polymeric materials exposed in the laboratory and field. The apparatus was designed to

Relation between Structural and Dynamical Anomalies in Supercooled Water

January 1, 2002

Author(s)

P A. Netz, Francis W. Starr, M C. Barbosa, H E. Stanley

Relative Group Delay Measurements with 0.3 ps Resolution: Toward 40 Gbit/s Component Metrology

January 1, 2002

Author(s)

Tasshi Dennis, Paul A. Williams

We demonstrate relative group delay measurements on a molecular absorption line using a modulation phase shift technique yielding 0.3 ps resolution. Measured features as small as [approximately}1 ps in a hydrogen cyanide gas cell are shown to agree well

Relativistic many-body calculations of energies of n = 3 states in aluminumlike ions,

January 1, 2002

Author(s)

U I. Safronova, C Namba, J R. Albritton, W R. Johnson, M S. Safronova

Relativistic many-body calculations of excitation energies and transition rates in ytterbiumlike ions,

January 1, 2002

Author(s)

U I. Safronova, W R. Johnson, M S. Safronova, J R. Albritton

Relativistic many-body calculations of transition rates from core-excited states in sodiumlike ions,

January 1, 2002

Author(s)

U I. Safronova, W R. Johnson, M S. Safronova, J R. Albritton

Research and Challenges in Applied Mechanics

January 1, 2002

Author(s)

K P. Chong, Martin Chiang

The United States Government pursues diligent funding of basic research because it confers a preferential economic advantage1. The National Science Foundation (NSF) and the National Institute of Standards and Technology (NIST) have supported basic research

Resonance Ionization Mass Spectrometry System for Measurement of Environmental Samples, edited by J.I. Trombka, D.P. Spears, and P.H. Solomon

January 1, 2002

Author(s)

Leticia S. Pibida, C A. McMahon, W N{omlat}rtersh{amlat}user, B A. Bushaw

Resonant control of elastic collisions in an optically trapped Fermi gas of atoms

January 1, 2002

Author(s)

T Loftus, C A. Regal, C Ticknor, J L. Bohn, D S. Jin

Resonant Enhancement of Refractive Index in a Cascade Scheme

January 1, 2002

Author(s)

A S. Zibrov, A B. Matsko, Leo W. Hollberg, V L. Velichansky, P N. Levedev

Resonating torque microbalance for in situ measurements of ferromagnetic films

January 1, 2002

Author(s)

John M. Moreland, James A. Beall, Stephen E. Russek

We describe an instrument for in situ monitoring of the magnetic moment of a thin film during deposition with sub-monolayer sensitivity. The instrument measures the magnetic torque on a film as it is being deposited onto a microcantilever excited near its

Review of residential sprinkler systems::research and standards

January 1, 2002

Author(s)

Daniel Madrzykowski, Russell P Fleming

Review: SQUID Multiplexers for Transition-Edge Sensors

January 1, 2002

Author(s)

Kent D. Irwin

We review the SQUID multiplexer schemes that are being developed to instrument large-format arrays of superconducting transition-edge sensors. We discuss the choice of an orthogonal basis set to represent the multiplexed signal (such as time or frequency)

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