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Search Publications

NIST Authors in Bold

Displaying 45401 - 45425 of 73697

Electron and Nuclear Spin Interactions in the Optical Spectra of Single GaAs Quantum Dots

May 1, 2001
Author(s)
R W. Gammon, A L. Efros, T A. Kennedy, M Rosen, D S. Katzer, D Park, Steven W. Brown, V L. Korenev, I A. Merkulov
Fine and hyperfine splittings arising from electron, hole and nuclear spin interactions in the magneto-optical spectra of indivisual localized excitons are studied. We explain the magnetic field dependence of the energy splitting through competition

Evaluating Optical Materials

May 1, 2001
Author(s)
Charles S. Tarrio, Thomas B. Lucatorto
curately quantifying optical constants is key to fabricating successful multiplayer film components

Expanding BACnet's Horizons

May 1, 2001
Author(s)
Steven T. Bushby
The International Air-Conditioning, Heating, Refrigerating Exposition that accompanied the 2001 ASHRAE Winter meeting in Atlanta included the largest interoperability demonstration of BACnet products ever held. It marked the five-year anniversary of the

Extrusion Visualization - from Blend Structure to Sharkskin

May 1, 2001
Author(s)
Kalman D. Migler
Over the last five years, we have developed optical technologies for in-line monitoring of extrusion. We review two areas where we have succeeded in uncovering important concepts and phenomena by shedding light on processes that were previously

Greens Functions for Boundary Element Analysis of Anisotropic Bimaterials

May 1, 2001
Author(s)
J R. Berger, Vinod K. Tewary
We present several region-dependent Green's functions for anisotropic bimaterials in two-dimensional elasticity and steady-state heat transfer problems. The details of the various Green's functions for perfect, slipping, and cracked interfaces are given

Growth and Characterization of Large Area Cu(In, Ga) Se 2 Films

May 1, 2001
Author(s)
A M. Hermann, Carlos A. Gonzalez, P A. Ramakrishnan, Davor Balzar, C H. Marshall, J N. Hilfiker, T Tiwald
Large area thin films of Cu(In,Ga)Se 2 (CIGS) were grown by sequential sputtering. Photovoltaic cells have been fabricated using these films and the performance bias been characterized. The effect of annealing conditions (temperature and duration) of the

High-Resolution Rb Two-Photon Spectroscopy With Ultrafast Lasers

May 1, 2001
Author(s)
T H. Yoon, A Marian, John L. Hall, Jun Ye
A two-photon wmsition in cold Rb atoms will be probed with a phase-coherent wide-bandwidth femtosecond laser comb. Frequency domainanalysis yields a high resolution picture where phase coherence among various transition pathways through different

Impact of Model-Driven Architecture

May 1, 2001
Author(s)
David W. Flater
The Object Management Group (the consortium that issues the Common Object Request Broker Architecture and Unified Modeling Language standards) is making the transition from a standards architecture in which only interface definitions are normative to one

JILA, National Institute of Standards and Technology, and University of Colorado at Boulder

May 1, 2001
Author(s)
D Z. Anderson, J E. Faller, M J. Holland, L Kolvalenko, S R. Leone, R McCray, David Nesbitt
The revised JILA brochure, written for those interested in NIST programs as well as for prospective graduate students, postdoctoral associates, and visiting fellows, provides an overview of JILA and its mission, and explains the joint nature of the

Large Anisotropy Via Oblique Sputtering of Ta Underlayers

May 1, 2001
Author(s)
John E. Bonevich, Robert D. McMichael, Chang H. Lee, P J. Chen, W Wyatt Miller, William F. Egelhoff Jr.
Anisotropy fields in excess of 120 KA/m (1500 Oe) have been produced in 3 nm to 5 nm thick polycrystalline films of Co by oblique sputtering of Ta underlayers. The unusually high anisotropy is magnetostatic in origin, and is induced by corrugations on the

Lifetimes, Branching Fractions, and Oscillator Strengths of Doubly Ionized Tungsten

May 1, 2001
Author(s)
M Schultz-Johanning, R Kling, R Schnabel, M Kock, ZZ Li, H Lundberg, S Johansson
A first set of W III oscillator strengths has been obtained from combined lifetime and brancing fraction measurements. The branching fractions in the wavelength region of 154-334 nm were measured on a Penning discharge with Fourier transform spectroscopy

Looking at the Whole Picture: A Case Study of Analyzing a Virtual Workplace

May 1, 2001
Author(s)
Michelle P. Steves, Emile L. Morse
Evaluating collaborative systems is much more difficult than evaluating single-user systems due to the number of simultaneous (synchronous) or intertwined (both asynchronous and synchronous) interactions. The types of data that can be gathered are diverse

Luminous Flux Calibrations of LEDs at NIST

May 1, 2001
Author(s)
Carl C. Miller, Yoshihiro Ohno
The total luminous flux (lumen) is one of the most important characteristics of Light Emitting Diodes (LEDs), and is commonly measured using integrating sphere photometers. Large variations of measurement results are reported among different manufacturers

MALDI MS of Saturated Hydrocarbon Polymers: Polyethylene and Other Polyolefins

May 1, 2001
Author(s)
William E. Wallace, Charles M. Guttman, B M. Fanconi, Barry J. Bauer
Saturated hydrocarbon polymers, polyethylene and polypropylene, are, by production volume, the most widely used of all synthetic polymers. Their molecular mass and molecular mass distribution (MMD) are critical in determining performance properties. There

Measurements and Predictions of Light Scattering by Clear Coatings

May 1, 2001
Author(s)
M E. McKnight, Theodore V. Vorburger, Egon Marx, Maria E. Nadal, P Y. Barnes, Michael A. Galler
Comparisons are made between calculations and measured angle-resolved light scattering distributions from clear dielectric isotropic epoxy coatings over a range of rms roughness conditions, resulting in strongly specular scattering characteristics
Displaying 45401 - 45425 of 73697
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