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Search Publications

NIST Authors in Bold

Displaying 17826 - 17850 of 73929

Interferometric measurement of large sphere radii using holograms

July 8, 2015
Author(s)
Ulf Griesmann, Quandou (. Wang, Johannes A. Soons, Kate Medicus
We describe a new interferometric method for the measurement of large sphere radii in which the converging test beam is replaced by a pair of test beams with different focal lengths. The test beams are created by a pair of holograms that are fabricated on

MEMS optomechanical accelerometry standards

July 8, 2015
Author(s)
Felipe Guzman, Yiliang Bao, Jason J. Gorman, John R. Lawall, Jacob M. Taylor, Thomas W. LeBrun
Current acceleration primary standards reach relative uncertainties of the order of 0.001 and consist of complex test facilities, typically operated at National Metrology Institutes. Our research focuses on the development of silicon mechanical oscillator

Optomechanical Motion Sensors

July 8, 2015
Author(s)
Felipe Guzman, Oliver Gerberding, John T. Melcher, Julian Stirling, Jon R. Pratt, Gordon A. Shaw, Jacob M. Taylor
Compact optical cavities can be combined with motion sensors to yield unprecedented resolution and SI-traceability in areas such as acceleration sensing and atomic force microscopy AFM, among others. We have incorporated Fabry-Perot fiber-optic micro

Aging of Polymeric Films used in Protective Glazing Systems

July 7, 2015
Author(s)
Christopher C. White, Donald L. Hunston, Kar T. Tan
The toughness of polymer and glass laminates or win-dow glazing, are used to protect buildings and occupants from shattered glass resulting from natural disasters (e.g., hurricanes, tornadoes, seismic events), and intentional events (e.g., robbery

Best Practices for Evaluating Single Nucleotide Variant Calling Methods for Microbial Genomics

July 7, 2015
Author(s)
Nathanael D. Olson, Steven P. Lund, Rebecca Colman, Jeffery T. Foster, Jason W. Sahl, James M. Schupp, Paul Keim, Jayne B. Morrow, Marc L. Salit, Justin M. Zook
Innovations in sequencing technologies have allowed biologists to make incredible advances in understanding biological systems. As experience grows, researchers increasingly recognize that analyzing the wealth of data provided by these new sequencing

Interference and Coexistence of Wireless Systems in Critical Infrastructure

July 7, 2015
Author(s)
Galen H. Koepke, William F. Young, John M. Ladbury, Jason B. Coder
We examine interference and coexistence testing issues, test methods, and the need to update and develop new test methodologies related to the use of wireless devices in critical infrastructure systems. A case study on interference is presented along with

Quantum-correlated photon pairs generated in commercial 45 nm complementary metal-oxide semiconductor microelectronics

July 7, 2015
Author(s)
Cale M. Gentry, Jeff Shainline, Mark W. Wade, Martin Stevens, Shellee D. Dyer, Xiaoge Zeng, Fabio Pavanello, Thomas Gerrits, Sae Woo Nam, Richard Mirin, Milos A. Popovic
Correlated photon pairs are a fundamental component of quantum photonic systems. While pair sources have previously been integrated on silicon chips in custom facilities, these often take advantage of only a small fraction of microelectronics fabrication

Single-Photon Detector Calibration

July 7, 2015
Author(s)
Sergey V. Polyakov
In this chapter we introduce the set of detector properties, common to most contemporary detectors, that should be determined for a complete characterization. Then we introduce methods for detector characterization, and finally we present practical recipes

Software Tools for XML to OWL Translation

July 7, 2015
Author(s)
Thomas Kramer, Benjamin H. Marks, Craig I. Schlenoff, Stephen B. Balakirsky, Zeid Kootbally, Anthony Pietromartire
This paper describes a set of closely related C++ software tools for manipulating XML (eXtensible Markup Language) schemas and XML instance files and translating them into OWL (Web Ontology Language) class _les and OWL instance files. They include: (1) an

A New Cold Neutron Imaging Instrument at NIST

July 6, 2015
Author(s)
Daniel S. Hussey, Christoph W. Brocker, David L. Jacobson, Thomas R. Gentile, Wangchun Chen, Elias M. Baltic, DV Baxter, J. Doskow, Muhammad D. Arif
The NIST neutron imaging program will build a new imaging instrument in the NCNR guide hall at the end of the neutron guide NG-6, beginning operation in summer of 2014. The NG-6 guide has a spectrum that is strongly peaked at a neutron wavelength of 5 Å

STR Allele Sequence Variation: Current Knowledge and Future Issues

July 6, 2015
Author(s)
Katherine Gettings, Rachel A. Aponte, Peter Vallone, John M. Butler
This article reviews what is currently known about short tandem repeat (STR) allelic sequence variation in and around the twenty-four loci most commonly used throughout the world to perform forensic DNA investigations. These STR loci include D1S1656, TPOX

Microporous Metal-Organic Framework with Dual Functionalities for Highly Efficient Removal of Acetylene from Ethylene/Acetylene Mixtures

July 4, 2015
Author(s)
Tong-Liang Hu, Hailong Wang, Bin Li, Rajamani Krishna, Hui Wu, Wei Zhou, Yunfeng Zhao, Yu Han, Xue Wang, Weidong Zhu, Zizhu Yao, Shengchang Xiang, Banglin Chen
The removal of acetylene from ethylene/acetylene mixtures containing 1% acetylene is a technologically very important but highly challenging task. Current removal approaches include the partial hydrogenation of acetylene (C 2H 2) into ethylene (C 2H 4)

Common Biometric Exchange Formats Framework Standardization

July 3, 2015
Author(s)
Fred Herr, Fernando L. Podio
Common Biometric Exchange Formats Framework (CBEFF) provides a standardized set of definitions and procedures that support the interchange of biometric data in standard data structures called CBEFF biometric information records (BIRs). CBEFF permits

Gd(sub 90)Co(sub 2.5)Fe(sub 7.5) Alloy Displaying Enhanced magnetocaloric Properties

July 3, 2015
Author(s)
Virgil Provenzano, Robert D. Shull, G Kletetschka, Paul E. Stutzman
Because of its attractive magnetocaloric properties, gadolinium (Gd) metal is currently the refrigerant of choice in the development of near-room temperature magnetic cooling prototypes (refrigerators, heat pumps, and air conditioners). The overwhelming

Electron beam induced current in the high injection regime

July 2, 2015
Author(s)
Paul M. Haney, Heayoung Yoon, Prakash Koirala, Robert W. Collins, Nikolai B. Zhitenev
Electron beam induced current (EBIC) is a powerful technique which measures the charge collection efficiency of photovoltaics with sub-micron spatial resolution. The exciting electron beam results in a high generation rate density of electron-hole pairs

Micromechanical Testing of Electroplated Gold Alloy Films using Theta-Like Specimens

July 2, 2015
Author(s)
Mark McLean, William A. Osborn, Oliver Boomhower, Christopher Keimel, Rebecca Kirkpatrick, Frank W. DelRio
Micromechanical testing of electroplated gold alloy films has been conducted using the theta specimen geometry. Specimens were formed by a standard combination of photolithography, electroplating, and deep reactive ion etching. Testing was performed using
Displaying 17826 - 17850 of 73929
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