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Search Publications

NIST Authors in Bold

Displaying 47851 - 47875 of 143780

Al-Mn transition edge sensors for cosmic microwave background polarimeters

November 22, 2010
Author(s)
Daniel R. Schmidt, Hsiao-Mei Cho, Johannes Hubmayr, Peter J. Lowell, Michael D. Niemack, Galen C. O'Neil, Joel N. Ullom, Ki W. Yoon, Kent D. Irwin
Superconducting transition edge sensors (TES) require superconducting films with transition temperatures (Tc)and properties that can be tailored to the particular requirements of individual applications. We have been developing Al-Mn films with a tunable

Al-Mn Transition Edge Sensors for Cosmic Microwave Background Polarimeters

November 22, 2010
Author(s)
Daniel R. Schmidt, Hsiao-Mei Cho, Johannes Hubmayr, Peter J. Lowell, Michael D. Niemack, Galen C. O'Neil, Joel N. Ullom, Ki W. Yoon, Kent D. Irwin, W L. Holzapfel, M Lueker, E M. George, E Shirokoff
Superconducting transition edge sensors (TES) require superconducting films with transition temperatures (Tc)and properties that can be tailored to the particular requirements of individual applications. We have been developing Al-Mn films with a tunable

Neutron Scattering Study of a Quasi-2D Spin-1/2 Dimer System Piperazinium Hexachlorodicuprate Under Hydrostatic Pressure

November 22, 2010
Author(s)
Tao Hong, Chris Stock, I. Cabrera, Collin L. Broholm, Yiming Qiu, Juscelino Leao, Sarah Poulton, John R. Copley
We report inelastic neutron scattering study of a quasi-two-dimensional S=1/2 dimer system Piperazinium Hexachlorodicuprate under hydrostatic pressure. The spin gap δ becomes softened with the increase of the hydrostatic pressure while the bandwidth of the

GEOMETRICAL MEASUREMENTS OF NIST SRM ROCKWELL HARDNESS DIAMOND INDENTERS

November 21, 2010
Author(s)
Jun-Feng Song, Samuel R. Low III, Xiaoyu A. Zheng
The geometric parameters of 28 candidate Standard Reference Material (SRM) Rockwell hardness diamond indenters are calibrated by an automated system recently developed at the National Institute of Standards and Technology (NIST). The calibration results

Microstructure and hydrogen bonding in water-acetonitrile mixtures

November 19, 2010
Author(s)
Raymond D. Mountain
The connection between hydrogen bonding between water and acetonitrile in determining the microheterogeneity of the liquid mixture is examined using NPT molecular dynamics simulations. Mixtures for six, rigid, three-site models for acetonitrile and one

Novel Reduced Pressure-Balance Syringe for Chromatographic Analysis

November 19, 2010
Author(s)
Bret Windom, Thomas J. Bruno
When withdrawing a fluid sample from an apparatus at reduced pressures for additional chromatographic analyses, a gas tight plunger syringe proves ineffective as it does not create a substantial pressure differential to pull a fluid from a reduced pressure

Using Simulation To Assess The Effectiveness of Pallet Stacking Methods

November 19, 2010
Author(s)
Stephen B. Balakirsky, Frederick M. Proctor, Thomas R. Kramer, Pushkar Kolhe, Henrik I. Christensen
Stacking objects onto pallets is the most widely used method of bulk shipping, accounting for over 60% of the volume of goods shipped worldwide. Due in part to the wide variation in size, shape and weight of objects to be palletized, successful stacking is

Effects of water quality parameters on the release of silver nanoparticles from a ceramic surface using a quartz crystal microbalance.

November 18, 2010
Author(s)
Michael Stewart, Angela R. Bielefeldt, Elisabeth Mansfield, R S. Summers, Joseph N. Ryan
Ceramic water filters are used in many developing countries as a household water treatment technology, often produced locally using regionally-available materials, and constructed in various forms (i.e., as discs, candles, or pots) that all rely on similar

PUSH-BUTTON DISCRETE EVENT SIMULATION FOR ANALYSIS OF FACTORY FLOOR OPERATIONS

November 18, 2010
Author(s)
John L. Michaloski, Byeong Eon Lee, Frederick M. Proctor, Sid Venkatesh, Nils Bengtsson, Anders Skoogh, Benjamin Raverdy
In manufacturing, Discrete Event Simulation (DES) can be effectively used to model production and provide sustainability analysis of equipment and system operation by measuring throughput, capacity, and bottlenecks. DES allows analysis under different

WSQ Problem with Two-Thumb Captures from Large Platen Live-Scan Devices

November 18, 2010
Author(s)
Craig I. Watson
This paper investigates an issue with the Wavelet Scalar Quantization (WSQ) compression algorithm which causes severe degradation of the compressed image. The problem was first noticed when compressing the two-thumb images from live-scan identification

An optical frequency comb for infrared spectrograph calibration

November 17, 2010
Author(s)
Gabriel G. Ycas, Franklyn J. Quinlan, Steve Osterman, Gillian Nave, Craig J. Sansonetti, Scott A. Diddams
Detection of extrasolar planets by measurement of the stellar radial velocity shift requires high resolution spectroscopy with long term stability. Presently, the primary wavelength standards in the NIR are NePt and ThAr lamps and absorption cells. These

Level Crossings and Zero-Field Splitting in the Cr 8 }-Cubane Spin-cluster by Inelastic Neutron Scattering and Magnetization Studies

November 17, 2010
Author(s)
David Vaknin, V. O. Garlea, F. Demmel, E. Mamontov, H. Nojiri, C. Martin, I. Chiorescu, Yiming Qiu, P. Kogerler, J. Fielden, L. Engelhardt, M. Luban, M. Luban
Millikelvin inelastic neutron scattering in variable magnetic field and high-field magnetization measurements were performed to gain insight into the low-energy magnetic excitation spectrum and the field-induced level crossings in the molecular spin
Displaying 47851 - 47875 of 143780
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