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Search Publications

NIST Authors in Bold

Displaying 45301 - 45325 of 73697

OOF: An Image-Based Finite Element Analysis of Material Microstructure

June 1, 2001
Author(s)
Stephen A. Langer, W Carter, Lin-Sien H. Lum
The determination of macroscopic properties of a material given its microscopic structure is of fundamental importance to materials science. We present an overview of two public domain programs which jointly predict macroscopic behavior, starting from an

Pauli Blocking of Collisions in a Quantum Degenerate Atomic Fermi Gas

June 1, 2001
Author(s)
B. L. DeMarco, S Papp, D S. Jin
We have produced an interacting quantum degenerate Fermi gas of atoms composed of two spin-states of magnetically trapped 40K. The relative Fermi energies are adjusted by controlling the populations in each spin-state. Thermodynamic measurements reveal a

Photocurrent Measurement of PC and PV HgCdTe Detectors

June 1, 2001
Author(s)
George P. Eppeldauer, R J. Martin
Novel preamplifiers for working standard PC and PV HgCdTe detectors have been developed to maintain the spectral responsivity scale of the National Institute of Standards and Technology (NIST) in the wavelength range of 5 m to 20 m. The linear PC mode

Process Descriptions

June 1, 2001
Author(s)
Joshua Lubell
We consider the use of XML (Extensible Markup Language) for applications involving discrete processes. Examples of such processes include production scheduling, process planning, workflow, business process re-engineering, simulation, process realization

Quality Control of PCR Primers Used in Multiplex STR Amplifcation Reactions

June 1, 2001
Author(s)
John M. Butler, J E. Devaney, M A. Marino, Peter M. Vallone
Reliable amplification of short tandem repeat (STR) DNA markers with the polymerase chain reaction (PCR) is dependent on high quality PCR primers. The particular primer combinations and concentrations are especially important with multiplex amplification

Quantum Gates Using Motional States in an Optical Lattice

June 1, 2001
Author(s)
E Charron, Eite Tiesinga, F H. Mies, Carl J. Williams
We Study an implementation of a two-qubit universal quantum gate with neutral 87Rb atoms trapped in a far-detuned two-color optical lattice. The qubit states and represent the ground and first excited motional states of an atom in a laser induced potential

Referencing Dilution-Based Trace Humidity Generators to Primary Humidity Standards

June 1, 2001
Author(s)
Peter H. Huang, Gregory E. Scace, Joseph T. Hodges
We describe a technique for measuring the trace humidity level delivered by a permeationtube type moisture generator (PTMG). Amount fractions in the range 10 nmol/mol to 100 nmol/mol of H2O in N2 carrier gas were considered. The measurements are referenced

Report on the Development of the Advanced Encryption Standard (AES)

June 1, 2001
Author(s)
James R. Nechvatal, Elaine B. Barker, Lawrence E. Bassham, William E. Burr, Morris J. Dworkin, James Foti, E Roback
In 1997, the National Institute of Standards and Technology (NIST) initiated a process to select a symmetric-key encryption algorithm to be used to protect sensitive (unclassified) Federal information in furtherance of NIST's statutory responsibilities. In

Shear Viscosity of Phase Separating Polymer Blends With Viscous Asymmetry

June 1, 2001
Author(s)
H Jeon, Erik K. Hobbie
Rheo-optical measurements of phase separating polymer mixtures under simple shear flow have been used to investigate the influence of domain morphology on the viscosity of emulsion-like polymer blends. The morphology and viscosity of low-molecular weight

Should (T 1 - T 2 ) Have Larger Uncertainty Than T 1 ?

June 1, 2001
Author(s)
Lee Y. G
In interlaboratory comparisons, laboratories sometimes use a transfer instrument to realize the value of a laboratory standard to compare the relative biases of their measurement processes and standards. One summary of interest from such comparisons is the

Small Fixed-Point Cells for Use in Dry Well Block Calibrators

June 1, 2001
Author(s)
Gregory F. Strouse
As part of a research project for the Combined Calibration Group (CCG) of the U.S. Armed Forces, three rugged fixed-point cells were developed for use in dry well block calibrators (DWBCs). The small fixed-point cells of the water triple point (0.01 C)

Solid State Sintering

June 1, 2001
Author(s)
J Blendell
The basic processes which control the solid state sintering of crystalline materials are reviewed. The stages of sintering are described and model which predict the evolution of the microstructure are presented. The effects of dihedral angle and pore

Spin-on Nanoparticle Tin Oxide for Microhotplate Gas Sensors

June 1, 2001
Author(s)
Richard E. Cavicchi, R M. Walton, M I. Aquino-Class, J D. Allen, B. Panchapakesan
A colloidal suspension of tin oxide nanoparticles is used to prepare a highly sensitive gas sensing film on a microhotplate. Fabrication consists of spin-coating the solution over an array of micromachined hotplates and annealing. A thermolithographic
Displaying 45301 - 45325 of 73697
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