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Search Publications

NIST Authors in Bold

Displaying 22226 - 22250 of 73929

Ultrafast element-specific magnetization Dynamics of complex magnetic materials on a table-top

December 21, 2012
Author(s)
Thomas J. Silva, Justin M. Shaw, Hans T. Nembach, Chan La-O-Vorakiat, Henry C. Kapteyn, Margaret M. Murnane, Stefan Mathias, Roman Adam, Patrik Grychtol, Martin Aeschlimann, Claus M. Schneider, Emrah Turgut, Dennis Rudolf
We review recent progress in femtosecond magnetization dynamics probed by extreme ultraviolet pulses from high-harmonic generation. In a transverse magneto-optical Kerr geometry, we establish an ultrafast, element-specific experimental capability - on a

Application of nanoporous silicon substrates for terahertz spectroscopy

December 20, 2012
Author(s)
Edwin J. Heilweil, Shu-Zee A. Lo, Gagan Kumar, Thomas E. Murphy
Infrared spectroscopy is a valuable tool for probing and characterizing the macro-molecular motions of complex molecules, including vibrational and phonon modes that cannot be easily accessed through visible spectroscopy. We describe here an improved

The Current State and Recent Trends of the U.S. Manufacturing Industry

December 20, 2012
Author(s)
Douglas Thomas
This report brings together multiple sources of aggregate manufacturing industry data and industry subsector data to develop a quantitative depiction of the U.S. manufacturing industry. It compares the U.S. manufacturing industry to its international

Beyond the Business Cycle: The Need for a Technology-Based Growth Strategy

December 19, 2012
Author(s)
Gregory C. Tassey
Facing the worst economic slowdown since the Great Depression, efforts to reestablish acceptable growth rates for the U.S. economy are relying almost entirely on short-term “stabilization” policies. However, the massive monetary and fiscal “stimulus”

Structural Irreversibility in Enhanced Brittleness under Fatigue in Zr-Based Amorphous Solids

December 19, 2012
Author(s)
Peng Tong, Despina Louca, Gongyao Wang, Peter K. Liaw, Yoshihiko Yokoyama, Anna Llobet, Hiroshi Kawaji, Yiming Qiu, Yunfeng Shi
Amorphous metals are solid metallic materials devoid of periodicity, with disordered atomic structures achieved by supercooling the viscous liquid to avoid crystallization. Whilst trapped in this supercooled state with an atomic topology that resembles

Adaptive measurements in nonorthogonal state discrimination

December 18, 2012
Author(s)
Francisco E. Becerra Chavez, Alan L. Migdall
Adaptive measurements represent important resources in quantum information science and quan- tum technologies. They take advantage of the knowledge of partial measurements of the system to optimize subsequent measurements and perform tasks that are dicult

Cavity optomechanics with sub-wavelength grating mirrors

December 18, 2012
Author(s)
Utku Kemiktarak, Mathieu Durand, Michael Metcalfe, John R. Lawall
We design, fabricate, and study a novel platform for cavity optomechanics: a silicon nitride membrane patterned as a sub-wavelength diffraction grating. Using the grating as one mirror of a Fabry-Perot cavity, we realize an optical finesse of $F=2830\pm 60

Dynamics of a pulsed single photon source

December 18, 2012
Author(s)
Sergey V. Polyakov, Edward B. Flagg, Tim O. Thomay, Glenn S. Solomon
We propose and demonstrate a method for an independent verification of a degree of single photon purity and coherence applicable for all single-photon emitters used in pulsed mode. Using two-time second-order correlation measurements, we reconstruct the

Smoldering in Flexible Polyurethane Foams: the Effect of Foam Morphology

December 18, 2012
Author(s)
Mauro Zammarano, Szabolcs Matko, Roland H. Kraemer, Rick D. Davis, Jeffrey W. Gilman, Li Piin Sung, Douglas M. Fox, Shivani N. Mehta
Smoldering is a self-sustaining heterogeneous oxidation reaction that induces a slow, low temperature, flameless combustion. Flexible polyurethane foams (PUF) are prone to smoldering due to their high air permeability, low density and high specific surface

Direct Measurement of Intrinsic Dirac Point and Fermi level at Graphene/Oxide interface and Its Band Alignment by Cavity Enhanced Internal Photoemission

December 17, 2012
Author(s)
Kun Xu, Caifu Zeng, Qin Zhang, Rusen Yan, Peide Ye, Kang Wang, Alan C. Seabaugh, Huili G. Xing, John S. Suehle, Curt A. Richter, David J. Gundlach, Nhan V. Nguyen
We report the first direct measurement of the Dirac point, the Fermi level, and the work function of graphene by performing internal photoemission measurements on a graphene/SiO2/Si structure with a unique optical-cavity enhanced test structure. A complete

Spectroscopic Identification of Hydrogen Spillover Species in Ruthenium-modified High Surface Area Carbons by Diffuse Reflectance Infrared Fourier Transform Spectroscopy

December 17, 2012
Author(s)
Jeffrey L. Blackburn, Chaiwat Engtrakul, Justin B. Bult, Katherine Hurst, Yufeng Zhao, Qiang Xu, Philip A. Parilla, Lin J. Simpson, John-David R. Rocha, Matthew Ross Hudson, Craig Brown, Thomas Gennett
In recent years, carbon-based sorbents have been recognized for their potential application within vehicular hydrogen storage applications. One method by which sorbents have been reported to store appreciable hydrogen at room temperature is via a spillover

Introducing the Federal Cybersecurity R&D Strategic Plan

December 14, 2012
Author(s)
Douglas Maughan, Bill Newhouse, Tomas Vagoun
In December 2011, the White House Office of Science and Technology Policy (OSTP) released the Trustworthy Cyberspace: Strategic Plan for the Federal Cybersecurity Research and Development Program - a framework for a set of coordinated Federal strategic

Securing Americas Digital Infrastructure Through Education

December 14, 2012
Author(s)
William D. Newhouse
This article provides an overview of the establishment of the National Initiative for Cybersecurity Education (NICE), its government structure, and it goals. Parallels are drawn between the strategic R&D thrust, Developing Scientific Foundations, described

Current Distribution and Transition Width in Superconducting Transition-Edge Sensors

December 13, 2012
Author(s)
Daniel S. Swetz, Douglas A. Bennett, Daniel R. Schmidt, Joel N. Ullom
Present models of the superconducting-to-normal transition in transition-edge sensors (TESs)do not describe the current distribution within a biased TES. This distribution is complicated by normal-metal features that are integral to TES design. We present

Dietary Supplement Laboratory Quality Assurance Program: Exercise H Final Report

December 13, 2012
Author(s)
Melissa M. Phillips, Catherine A. Rimmer, Laura J. Wood, Anthony F. Marlow, Michele M. Schantz, John R. Sieber
The NIST Dietary Supplement Laboratory Quality Assurance Program (DSQAP) was established in collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements (ODS) in 2007 to enable members of the dietary supplements community to

Recommended viscosities of 11 dilute gases at 25?degC

December 13, 2012
Author(s)
Robert F. Berg, Michael R. Moldover
Commercially manufactured meters that measure the flow of a process gas are often calibrated with a known flow of a surrogate gas. This requires an accurate model of the flow meter and accurate values of the relevant thermophysical properties for both
Displaying 22226 - 22250 of 73929
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