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Search Publications

NIST Authors in Bold

Displaying 22601 - 22625 of 73697

Model Based Enterprise / Technical Data Package Summit Report

August 13, 2012
Author(s)
Joshua Lubell, Kenway K. Chen, John A. Horst, Simon P. Frechette, Paul J. Huang
This report summarizes the presentations, discussions and recommendations of a workshop held at the National Institute of Standards and Technology in December of 2011. The purpose of the workshop was to identify challenges, research, and implementation

Multiple Magnetic Structures of Correlated Ce-ions in Intermetallic CeAu 2 Ge 2

August 13, 2012
Author(s)
Deepak Singh, A. Thamizhavel, Jeffrey W. Lynn, S. K. Dhar, T. Hermann
Neutron diffraction measurements on a high quality single crystal of CeAu 2Ge 2 reveal two new magnetic structures that coexist with commensurate long range antiferromagnetic order below the Neel temperature T N {approximately equal} 14 K. The new magnetic

Partial-Transfer Absorption Imaging: A versatile technique for optimal imaging of ultracold gases

August 13, 2012
Author(s)
Gretchen K. Campbell, Sergio R. Muniz, Kevin Wright, Russell P. Anderson, William D. Phillips, Kristian Helmerson
Partial-transfer absorption imaging is a tool that enables optimal imaging of atomic clouds for a wide range of optical depths. In contrast to standard absorption imaging, the technique can be minimally-destructive and can be used to obtain multiple

Scintillation Yield and Time Dependence from Electronic and Nuclear Recoils in Liquid Neon

August 13, 2012
Author(s)
Kevin J. Coakley, W. H. Lippincott, D. Gastler, E. Kearns, D. N. McKinsey, J. A. Nikkel
We have performed measurements of scintillation light in liquid neon, observing a signal yield in our detector as high as (3.5 +/- 0.04) photoelectrons/keV. We measure pulse shape discrimination between electronic and nuclear recoils in liquid neon between

Solution-phase and Magnetic Approach Towards Understanding Iron Gall Inks

August 13, 2012
Author(s)
Harshita Kumari, Steven R. Kline, Cindi L. Dennis, Andrew V. Mossine, Rick L. Paul, Carol A. Deakyne, Jerry L. Atwood
Crystallization of compounds of iron with polyphenols, such as iron gall inks, has been an ongoing challenge. As with iron-gall inks, iron complexes of 1,2,3-trihydroxphenol-containing marocycles have also proved difficult to crystallize. Despite this

Superfluidity Goes 2D

August 13, 2012
Author(s)
Gretchen K. Campbell
In two-dimensional systems, superfluidity occurs in the absence of the long-range order associated with Bose-Einstein condensates. This phenomenon is illustrated in the direct observation of superfluidity in a two-dimensional atomic Bose gas.

Characterization of Surface Accumulation and Release of Nanosilica During Irradiation of Polymer Nanocomposites with Ultraviolet Light

August 12, 2012
Author(s)
Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Savelas A. Rabb, Paul E. Stutzman, Justin M. Gorham, Xiaohong Gu, Lee L. Yu, Joannie W. Chin
Nanofillers are increasingly used for enhancing multiple properties of polymeric materials in many applications. However, polymers are susceptible to photodegradation by solar ultraviolet (UV) radiation Therefore, nanofillers in a polymer nanocomposite

Early-time Behavior in Reverberation Chambers and Its Effect on the Relationships Between Coherence Bandwidth, Chamber Decay Time, RMS Delay Spread, and the Chamber Build-up Time

August 12, 2012
Author(s)
Christopher L. Holloway, Haider Shah, Ryan J. Pirkl, Catherine A. Remley, David A. Hill, John M. Ladbury
The use of reverberation chambers for electromagnetic testing is widely being accepted for use in many measurement applications. In recent years reverberation chambers are beginning to merge as a test facility for testing wireless device and for emulating

Structural Analysis of Impact Damage to World Trade Center Buildings 1, 2, and 7

August 12, 2012
Author(s)
Therese P. McAllister, Fahim Sadek, John L. Gross, Steven W. Kirkpatrick, Robert S. MacNeill, R. Bocchieri, Mehdi S. Zarghamee, Omer O. Erbay, Andrew T. Sarawit
The National Institute of Standards and Technology (NIST) conducted an extensive investigation of the collapse of World Trade Center towers (WTC 1 and WTC 2) and the WTC 7 building. This paper describes the reconstruction of impact damage to each of the

Thermogravimetric Analysis with a Heated Quartz Crystal Microbalance

August 11, 2012
Author(s)
Ward L. Johnson, Elisabeth Mansfield
Thermogravimetric analysis with an SC-cut quartz crystal microbalance (QCM) were demonstrated at temperatures in the range from 20 C to 450 C. A measurement system was built around a crystal sensor head that was mounted in a small tube furnace. Changes in

A near-field scanning microwave microscope for characterization of inhomogeneous photovoltaics

August 10, 2012
Author(s)
Joel C. Weber, Kristine A. Bertness, John B. Schlager, Norman A. Sanford, Atif A. Imtiaz, Thomas M. Wallis, Pavel Kabos, Kevin J. Coakley, Victor Bright, Lorelle M. Mansfield
We present a near field scanning microwave microscope (NSMM) optimized for imaging photovoltaic samples. Our system incorporates a cut Pt-Ir tip inserted into an open ended coaxial cable to form a weak resonator, allowing the microwave reflection S11

Are intelligent agents the key to optimizing building HVAC system performance?

August 10, 2012
Author(s)
George E. Kelly, Steven T. Bushby
This paper describes the development and implementation of a simulation testbed used to study the concept of employing intelligent agents to optimize the performance of building Heating, Ventilating, and Air Conditioning (HVAC) systems. One day simulated

Noble gas viscosities at 25 degrees C

August 10, 2012
Author(s)
Robert F. Berg, William C. Burton
Near 25 C, ab initio calculations of the zero-density viscosity of helium gas eta_He have an uncertainty of approximately 0.001 %, which is 1/40th of the uncertainty of the best measurements. The uncertainties of the published calculations for neon [Bich

Optical Trapping in Air of an Individual Nanotube-Sphere Device

August 10, 2012
Author(s)
Andrew J. Slifka, Gurpreet Singh, Paul Rice, Damian S. Lauria, Roop Mahajan
We demonstrate the optical manipulation of a polystyrene bead in air attached to an individual carbon nanotube. In continuation of our previous work [1] we have also utilized this technique to demonstrate the calibration of a nanotube-sphere (NT-sphere)

Wireless Technologies in Healthcare: Selected Papers from IEEE PIMRC 2011

August 10, 2012
Author(s)
Kamran Sayrafian, Kamya Yekeh Yazdandoost
The use of wireless technologies for medical device communication, health monitoring (at hospitals or homes) and mobile healthcare information delivery (i.e. m-Health) is one of the most rapidly growing areas in health-IT research today. The papers which

Current-induced synchronized switching of magnetization

August 7, 2012
Author(s)
Kyung Jin Lee, Soo-Man Seo
We propose a multilayer structure that allows a reduced switching current with maintaining high thermal stability of the magnetization. It consists of a perpendicular polarizer, a perpendicular free-layer, and an additional free-layer having in-plane

Unwanted Combustion Enhancement by C6F12O Fire Suppressant

August 7, 2012
Author(s)
Gregory T. Linteris, Valeri I. Babushok, Peter B. Sunderland, Fumiaki Takahashi, Viswanath R. Katta, Oliver Meier
Several agents are under consideration to replace CF3Br for use in suppressing fires in aircraft cargo bays. In a Federal Aviation Administration (FAA) performance test simulating the explosion of an aerosol can, however, the replacements, when added at

An Exploration of the Operational Ramifications of Lossless Compression of 1000 ppi Fingerprint Imagery

August 6, 2012
Author(s)
Shahram Orandi, John M. Libert, John D. Grantham, Kenneth Ko, Stephen S. Wood, Jin Chu Wu, Lindsay M. Petersen, Bruce Bandini
This paper presents the findings of a study initially conducted to measure the operational impact of JPEG 2000 lossy compression on 1000 ppi fingerprint imagery at various levels of compression, but later expanded to include lossless compression. Lossless
Displaying 22601 - 22625 of 73697
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