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Search Publications

NIST Authors in Bold

Displaying 22076 - 22100 of 73697

Thermochemistry of alpha-D-xylose(cr)

December 4, 2012
Author(s)
Robert N. Goldberg, Manuel A. Ribeiro da Silva, Maria D. Ribeiro da Silva, Ana I. Lobo Ferreira, Quan Shi, Brian F. Woodfield
The thermochemistry of alpha-D-xylose(cr) was studied by means of oxygen bomb calorimetry and a Physical Property Measurement System (PPMS) in zero magnetic field. The sample of -D-xylose(cr) used in this study was one well-characterized by HPLC, Karl

Capturing nanoscale in network gels by microemulsion polymerization

December 3, 2012
Author(s)
Kirt A. Page, John Texter, Dustin England
Difficulties in capturing nanoscale structure by polymerizing microemulsions have persisted with the use of thermal initiation. Bicontinuous microemulsion polymerization with reactive surfactant monomer and cross-linker was done with only a 20% increase in

Dynamically Slowed Collapse of a Bose-Einstein Condensate with Negative Scattering Length

December 3, 2012
Author(s)
Karina K. Jimenez Garcia, Robert L. Compton, Yu-Ju Lin, James V. Porto, Ian B. Spielman
We rapidly change the scattering length a_s of a ^{87}Rb Bose-Einstein condensate by means of a Feshbach resonance, simultaneously releasing the condensate from its harmonic trapping potential. When a_s is changed from positive to negative, the subsequent

Microelectromechanical systems based Stewart platform with sub-nano resolution

December 3, 2012
Author(s)
Seung Ho Yang, Yong Sik Kim, Jae M. Yoo, Nicholas G. Dagalakis
Currently difficulties exist in the fabrication of microelectromechanical systems (MEMS) in the form of Stewart platforms. The macroscale positioning technology, such as universal joints, ball and roller bearings and commercial actuators, used for building

Protecting Wireless Local Area Networks

December 3, 2012
Author(s)
Shirley M. Radack, David R. Kuhn
This article summarizes the information that was presented in the February 2012 Information Technology Laboratory (ITL) bulletin, Guidelines for Securing Wireless Local Area Networks (WLANs). The bulletin, which was noted by WERB in February 2012, was

Relative Rigidity of Cell-Substrate Affects Hepatic and Hepatocellular Carcinoma Cell Migration

December 3, 2012
Author(s)
Martin Y. Chiang, Hongbing Wang, Li Zhong, Qiaoyan Tan, Gurinder K. Singh, Song Li, Li Yang, Yanzi Yangben
Polyacrylamide gels with different stiffness and glass were employed as substrates to investigate how substrate stiffness affects the cellular stiffness of adherent hepatocellular carcinoma (HCCLM3) and hepatic (L02) cells. The interaction of how cell

ThermoData Engine (TDE): Software Implementation of the Dynamic Data Evaluation Concept. 8. Properties of Material Streams and Solvent Design

December 3, 2012
Author(s)
Vladimir Diky, Robert D. Chirico, Chris D. Muzny, Andrei F. Kazakov, Kenneth G. Kroenlein, Joe W. Magee, Ilmutdin M. Abdulagatov, Carlos A. Diaz-Tovar, Jeong W. Kang, Rafiqul Gani, Michael D. Frenkel
ThermoData Engine (TDE) is the first full-scale software implementation of the dynamic data evaluation concept, as reported in this journal. The present paper describes the first application of this concept to the evaluation of thermophysical properties for

Virtual Reality Platform to Study RF Propagation in Body Area Networks

December 2, 2012
Author(s)
Kamran Sayrafian, John G. Hagedorn, Wen-Bin Yang, Judith E. Terrill
Design of efficient wireless communication protocols for body area networks requires in-depth understanding of the propagation media i.e. the human body. As obtaining large amount of data for many scenarios and use-cases via physical experiment is either

Broad-band frequency references in the near-infrared: accurate dual comb spectroscopy of methane and acetylene

December 1, 2012
Author(s)
Alexander M. Zolot, Fabrizio R. Giorgetta, Esther Baumann, William C. Swann, Ian R. Coddington, Nathan R. Newbury
The Doppler-limited spectra of methane between 176 THz and 184 THz (5870-6130 cm −1) and acetylene between 193 THz and 199 THz (6430-6630 cm −1) are acquired via comb-tooth resolved dual comb spectroscopy with frequency accuracy traceable to atomic

Controlling Atomic Interactions with Light

December 1, 2012
Author(s)
Ross A. Williams, Lindsay J. LeBlanc, Karina K. Jimenez Garcia, Matthew C. Beeler, Abigail R. Perry, William D. Phillips, Ian B. Spielman
For the majority of the 20th century atomic physicists used light to probe and understand atoms. Today, scientists use light to manipulate particles with unprecedented levels of control, routinely cooling atoms to a few billionths of a degree above

DNA Evolves

December 1, 2012
Author(s)
James A. Liddle, Seung-Hyeon Ko
None

High-energy Ultra-Small Angle X-ray Scattering Instrument at the Advanced Photon Source

December 1, 2012
Author(s)
Andrew J. Allen, Lyle E. Levine, Fan Zhang, Gabrielle G. Long, Jan Ilavsky, Pete R. Jemian
This paper reports recent tests performed on the Bonse-Hart-type ultra-small angle X-ray scattering (USAXS) instrument at the Advanced Photon Source with higher-order reflection optics — Si (440) instead of Si (220) — and with X-ray energies greater than

Long-term stability of metal-envelope enclosed ionization gauges

December 1, 2012
Author(s)
James A. Fedchak, Dana R. Defibaugh
Ionization vacuum gauges are used as secondary standards by calibration laboratories and as transfer standards in intercomparisons among metrology laboratories. A quantitative measurement of gauge stability with respect to the gauge calibration factor is
Displaying 22076 - 22100 of 73697
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