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NIST Authors in Bold

Displaying 45726 - 45750 of 143796

Experiment at NIST towards one-electron ions in circular Rydberg states

June 20, 2011
Author(s)
Joseph N. Tan, Samuel M. Brewer, Nicholas D. Guise
An experimental effort is underway at NIST to enable tests of theory with oneelectron ions synthesized in circular Rydberg states from captured bare nuclei. Problematic effects which limit the accuracy of predicted energy levels for low-lying states are

Frequency-comb based approaches to precision ranging laser radar

June 20, 2011
Author(s)
Nathan R. Newbury, Tze-Ann Liu, Ian R. Coddington, Fabrizio R. Giorgetta, Esther Baumann, William C. Swann
The output of pulsed femtosecond lasers can be controlled to generate pulse trains with very precise timing and optical frequency. This source can be used in different ways to support precision coherent LIDAR. We will discuss several implementations of

CFD Simulations on Extinction of Co-Flow Diffusion Flames

June 19, 2011
Author(s)
Randall J. McDermott, Jukka Vaari, Jason E. Floyd
An improved flame extinguishing criterion is implemented to the Fire Dynamics Simulator (FDS) for gaseous suppressants under the lumped species model with transport-limited combustion (infinitely fast chemistry). The criterion considers the total enthalpy

Microwave near-field probes for photovoltaic applications

June 19, 2011
Author(s)
Joel C. Weber
The photoresponse of three different photovoltaic Cu(In, Ga)Se 2 (CIGS) samples as well as GaAs and silicon bulk samples is measured using near-field scanning microwave microscopy (NSMM). Modeling predicts light-dependent conductivity values for bulk

Parametric study of micropillar array solar cells

June 19, 2011
Author(s)
Heayoung Yoon, Yu A. Yuwen, Haoting Shen, Nikolas J. Podraza, Thomas E. Mallouk, Elizabeth C. Dickey, Joan A. Redwing, Christopher R. Wronski, Theresa S. Mayer
Micro/nano pillar arrays can be a promising architecture for high efficiency solar cells based on less expensive photovoltaic materials with short minority carrier diffusion lengths (Ln, p). To investigate design tradeoffs of the radial junction array

Can Crowdsourcing Improve HCI?

June 18, 2011
Author(s)
Serge M. Egelman
Much of HCI research focuses on improving the user experience by using data from human subjects experiments. Designing a laboratory study, observing participants, and compensating them is a very expensive process, in terms of both time and money. Due to

A depth-16 circuit for the AES S-box

June 17, 2011
Author(s)
Joan Boyar, Rene Peralta
New techniques for reducing the depth of circuits for cryptographic applications are described and applied to the AES S-box. These techniques also keep the number of gates quite small. The result, when applied to the AES S-box, is a circuit with depth 16

A Roadmap for STEP-NC Enabled Interoperable Manufacturing

June 17, 2011
Author(s)
Fiona Zhao, Frederick M. Proctor, Martin Hardwick, Sid Venkatesh, David Odendahl, Xun Xu
STEP-NC is the result of a ten-year international effort to replace the RS274D (ISO 6983) G and M code standard with a modern associative language. The new standard connects CAD design data to CAM process data so that smart applications can understand both

Imaging of nanoscale charge transport in bulk heterojunction solar cells

June 17, 2011
Author(s)
Behrang H. Hamadani, Nadine E. Gergel-Hackett, Paul M. Haney, Nikolai B. Zhitenev
We have studied the local charge transport properties of organic bulk heterojunction solar cells based on the blends of poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) with a photoconductive atomic force microscope (PCAFM). We

Specification for Asset Identification 1.1

June 17, 2011
Author(s)
David A. Waltermire, John Wunder, Adam Halbardier
Asset identification plays an important role in an organization‟s ability to quickly correlate different sets of information about assets. This specification provides the necessary constructs to uniquely identify assets based on known identifiers and/or

Tool Temperatures in Orthogonal Cutting of Alloyed Titanium

June 17, 2011
Author(s)
Robert W. Ivester
This paper presents infrared-based measurements and analysis of cutting tool temperatures for orthogonal machining of alloyed titanium. High-speed infrared video provided the basis for measurement of cutting tool temperature distribution as reported here

A general approach to low noise readout of terahertz imaging arrays

June 16, 2011
Author(s)
Erich N. Grossman, Jonathan D. Chisum, Zoya Popovic
This article describes the theory and design of an ultra-low noise electronic readout circuit for use with room temperature video-rate terahertz imaging arrays. First, the noise characteristics of various imaging detectors, including low resistance

PDH-locked, frequency-stabilized cavity ring-down spectrometer

June 16, 2011
Author(s)
Joseph T. Hodges, A. Cygan, Piotr Maslowski, Katarzyna E. Bielska, S. Wojtewicz, J. Domyslawska, Hisashi Abe, R.S. Trawinski, R. Ciurylo
We describe a high sensitivity and high spectral resolution laser absorption spectrometer based upon the frequency-stabilized cavity ring-down spectroscopy (FS-CRDS) technique. We used the Pound-Drever-Hall (PDH) method to lock the probe laser to the high
Displaying 45726 - 45750 of 143796
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