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Displaying 15376 - 15400 of 17286

Analysis and Evaluation for STEP-Based Electro-Mechanical Assemblies

August 1, 2005
Author(s)
XuanFang Zha, Sebti Foufou, Sudarsan Rachuri, Ram D. Sriram
In this paper, we propose an integrated approach to assemblability analysis and evaluation for STEP-based (STandard for the Exchange of Product model data, officially ISO 10303) electro-mechanical products. First, two assembly representational models are

Thermodynamics of the Hydrolysis Reactions of Nitriles

July 1, 2005
Author(s)
Yadu D. Tewari, Robert N. Goldberg
Microcalorimetry and high-performance liquid chromatography (h.p.l.c) have been used to conduct a thermodynamic investigation of the following nitrilase catalyzed reactions: (1) benzonitrile(aq) + 2 H2O(l) = benzoic acid(aq) + ammonia(aq), (2)

Developing a More Rapid Test to Assess Sulfate Resistance of Hydraulic Cements

March 16, 2005
Author(s)
Chiara F. Ferraris, Paul E. Stutzman, Max A. Peltz, John A. Winpigler
External sulfate attack of concrete is a major problem that can appear in regions where concrete is exposed to soil or water containing sulfates, leading to softening and cracking of the concrete. Therefore, it is important that materials selection and

STEP, XML, and UML: Complementary Technologies

December 15, 2004
Author(s)
Russell S. Peak, Joshua Lubell, Vijay Srinivasan, Stephen C. Waterbury
One important aspect of product lifecycle management (PLM)is the computer-sensible representation of product information. Over the past 15 years or so, several languages and technologies have emerged that vary in their emphasis and applicability for such

Array Ordering in Dendritic Crystals and the Influence on Crystal Perfection

December 1, 2004
Author(s)
R E. Napolitano, David R. Black
In the work reported here, several important issues regarding the role of the evolving dendritic structure in the generation of crystal defects are investigated. Industrially produced single-crystal castings are examined, and the dendritic arrays are

A Four-Terminal Current Shunt with Calculable AC Response

August 30, 2004
Author(s)
Owen B. Laug, T. M. Souders, Bryan C. Waltrip
The design of a 0.1 Ohm, four-terminal current shunt with calculable frequency dependence up to 1 MHz is described. It is intended for use as a standard for current measurements up to 10 A rms with the primary purpose of being able to tie alternating

The ABRF-MIRG'02 Study: Assembly State, Thermodynamic, and Kinetic Analysis of an Enzyme/Inhibtor Interaction

December 1, 2003
Author(s)
D Myszka, Huixin He, F Arisaka, O Byron, Edward Eisenstein, P Hensley, J Thomson, C Lombardo, Frederick P. Schwarz, W Stafford, M Doyle
Fully characterizing the interactions involving biomolecules requires information on the assembly state, affinity, kinetics, and thermodynamics associated with complex formation. The analytical technologies often utilized to measure biomolecular

The N 3 and 2N 3 Bands of 32 S 16 O 3 , 32 S 18 O 3 , 34 S 16 O 3 , and 34 S 18 O 3

December 1, 2003
Author(s)
S W. Sharpe, Thomas A. Blake, R L. Sams, A G. Maki, Tony Masiello, J Barber, N Vulpanovici, J Nibler, A Weber
The sixth of a series of publications on the high resolution rotation-vibration spectra of sulfur trioxide reports the results of a systematic study of the Ņ 3(e') and 2Ņ 3(A 1'+E') infrared bands of the four symmetric top isotopomers 32S 16O 3, 32S 18O 3

Ab Initio Calculation of the KRb Dipole Moments

August 1, 2003
Author(s)
Svetlana A. Kotochigova, Paul S. Julienne, Eite Tiesinga
The relativistic configuration interaction valence bond method has been used to calculate permanent and transition electric dipole moments of the KRb heteronuclear molecule as a function of internuclear separation. The permanent dipole moment of the ground

The Alternating Direction Implicit (ADI) Formulation of the Finite-Difference Time-Domain (FDTD) Method: Algorithm and Material Dispersion Implementation

May 1, 2003
Author(s)
Shawn W. Staker, Christopher L. Holloway, Alpesh Bhobe, Melinda Piket-May, Tobin A. Driscoll
The ADI-FDTD technique is an unconditionally stable time-domain numerical scheme, allowing the Δ}t time step to be increased beyond the Courant-Friedrichs-Lewy (CFL) limit. Execution time of a simulation is inversely proportional to Δ}t, and as such

Line Assignments and Global Analysis of the Tunneling-Rotational Microwave Absorption Spectrum of Dimethyl Methylphosphonate

March 1, 2003
Author(s)
N Ohashi, J Pyka, G Y. Golubiatnikow, Jon T. Hougen, R D. Suenram, Francis J. Lovas, A Lesarri, Y Kawashima
Line assignments were carried out for about 600 Fourier transform microwave transitions for dimethyl methylphosphonate involving levels of all six symmetry species in the G 18 molecular symmetry group appropriate for three large-amplitude motions and
Displaying 15376 - 15400 of 17286
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