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Displaying 1276 - 1300 of 2521

Molecular beam growth of graphene nanocrystals on dielectric substrates

November 27, 2012

Author(s)

Daniel Fischer, Ulrich Wurstbauer, Theanne Schiros, Cherno Jaye, A. S. Plaut, R. He, Albert Rigosi, Liuyan Zhao, Christopher Gutierrez, P. Kim, L. N. Pfeiffer, A. Pasupathy, A. Pinczuk, J. M. Garcia

… that the size of the nanocrystals is approximately 20 nm. …

Temperature-dependent mechanical-resonance frequencies and damping in ensembles of gallium nitride nanowires

October 22, 2012

Author(s)

Kristine A. Bertness, Norman A. Sanford, J. R. Montague, H.S. Park, Victor M. Bright, Charles T. Rogers

… near 300 K with relative shifts of 40 {plus or minus} 20 ppm/K, consistent with temperature-dependent elastic …

The distance dependences and spatial uniformities of spectral irradiance standard lamps

October 19, 2012

Author(s)

Howard W. Yoon, Gary D. Graham, Robert D. Saunders, Yuqin Zong, Eric L. Shirley

… uniformities of the FEL lamps were also mapped over a 20 cm square area at 135 cm, 143 cm and 151 cm. In the NIST …

Multiple electrokinetic actuators for feedback control of colloidal crystal size

July 27, 2012

Author(s)

Jaime Juarez, Pramod Mathai, James Alexander Liddle, Michael Bevan

… of less than 10% for colloidal crystals containing 20 to 250 micron-sized silica spheres. The total number of …

Phase sensitive parametric optical metrology: Exploring the limits of 3-dimensional optical metrology

April 4, 2012

Author(s)

Richard M. Silver, Jing Qin, Bryan M. Barnes, Hui Zhou, Ronald G. Dixson, Francois R. Goasmat

… of sub-wavelength features or when imaging defects below 20 nm using angle-resolved and focus-resolved optical data. …

Optimization of Spin-triplet Supercurrent in Ferromagnetic Josephson Junctions

March 20, 2012

Author(s)

Benjamin James McMorran, Theresa Ginley, Julie Borchers, Brian Kirby, Brian B. Maranville, John Unguris

… that the spin-triplet supercurrent is enhanced up to 20 times after our samples are subject to a large in-plane …

Biology and Genetics of New Autosomal STR Loci Useful for Forensic DNA Analysis

January 4, 2012

Author(s)

John Butler, Carolyn Steffen

… in April 2011 to expand the U.S. core loci to as many as 20 STRs to enable more global DNA sharing. Commercial STR …

Effect of Al2O3 Nanolubricant on a Passively Enhanced R134a Pool Boiling Surface

November 15, 2011

Author(s)

Mark A. Kedzierski

… degradation was nearly constant for heat fluxes between 20 kW/m2 and 120 kW/m2. It was speculated that the boiling …

Improved activation and hydrogen storage properties of an amorphous Mg85Ni15 melt-spun alloy via surface treatment with NH4+ solution

October 13, 2011

Author(s)

Eric Lass

… material lowers the hydride decomposition temperature by 20 K to 50 K, in contrast to a sample activated at 573 K. The …

Sub-micron absolute distance measurements in sub-millisecond times with dual free-running femtosecond Er fiber-lasers

September 12, 2011

Author(s)

Tze-An Lui, Nathan R. Newbury, Ian R. Coddington

… drops below 1 micron at 0.8 msec and below 200 nm at 20 ms. The system can measure the distance to multiple …

Design and Optimization of a Permeation Testing System for Polymer Coatings

August 8, 2011

Author(s)

Adrian E. Verwolf

… in the sweep gas stream and detectability of less than 20 mPa of water vapor. The bulk of the maximum measured …

Comparison of Gas Velocity Measurements and CFD Predictions in the Exhaust Duct of a Stationary Source

July 13, 2011

Author(s)

Rodney A. Bryant, Olatunde B. Sanni, Elizabeth F. Moore, Robert P. Borthwick, Marco G. Fernandez, Iosif I. Shinder, Jiann C. Yang, Aaron N. Johnson

… used two S probes, one on each chord, and a minimum of 20 EPA Method 1 traverse positions per chord. Qualitative …

A High Resolution High-Sensitivity Standoff Imaging System at 350 GHz

May 23, 2011

Author(s)

Daniel T. Becker, Cale Gentry, James A. Beall, Hsiao-Mei Cho, William Duncan, Gene C. Hilton, Kent D. Irwin, Peter J. Lowell, Michael D. Niemack, Nicholas G. Paulter Jr., Carl D. Reintsema, Francis J. Schima, Robert E. Schwall, Peter Ade, Carole Tucker, Simon Dicker, Halpern Mark

Millimeter wavelength radiation holds promise for detection of security threats at a distance, including suicide bomb belts and maritime threats in poor weather conditions. The sensitivity provided by superconducting Transition-Edge-Sensor (TES) bolometers

AN EFFICIENT SENSITIVITY ANALYSIS METHOD FOR NETWORK SIMULATION MODELS

December 7, 2010

Author(s)

Kevin L. Mills, James J. Filliben

… parameters influencing the behavior of MesoNet, a 20-parameter network simulator. The method and principles …

Effect of Al 2 O 3 Nanolubricant on a Passively Enhanced R134a Pool Boiling Surface with Extensive Measurement and Analysis Details (NIST TN 1677)

September 29, 2010

Author(s)

Mark A. Kedzierski

… degradation was nearly constant for heat fluxes between 20 kW/m2 and 120 kW/m2. It was speculated that the boiling …

Characterization of gold nanoparticles modified with single-stranded DNA using analytical ultracentrifugation and dynamic light scattering

August 3, 2010

Author(s)

James Falabella, Tae Joon Cho, Dean C. Ripple, Vincent A. Hackley, Michael J. Tarlov

… scattering. Sedimentation coefficients of nominally 10 and 20 nm diameter gold nanoparticles modified with …

Purification Chemical Structure Electrical Property Relationship in Gold Nanoparticle Liquids

August 1, 2010

Author(s)

Robert I. MacCuspie, Andrea M. Elsen, Steve J. Diamanti, Steve T. Patton, Igor Altfeder, J. D. Jacobs, Andrey A. Voevodin, Richard A. Vaia

… gold nanoparticle starting materials, sized from 6 nm to 20 nm and initially coated with either citrate or …

Modeling and Experimental Analysis of Piezoelectric Shakers for High-Frequency Calibration of Accelerometers

June 22, 2010

Author(s)

Gregory W. Vogl, Kari K. Harper, Beverly F. Payne

… while extending the calibration frequency range beyond 20 kHz. The ability to build and measure piezoelectric …

Reflective attenuators for high energy laser measurements

March 14, 2010

Author(s)

John H. Lehman, David J. Livigni, Christopher L. Cromer, Xiaoyu X. Li, Marla L. Dowell

… A high-energy laser attenuator in the range of 250 mJ (20 nsec pulse width, 10 Hz repetition rate, 1064 nm, 1574 nm …

Effect of RP-1 Compositional Variability on Thermal Conductivity at High Temperatures and High Pressures

July 29, 2009

Author(s)

L.A. Akhmedova-Azizova, Ilmutdin M. Abdulagatov, Thomas J. Bruno

Thermal conductivity of rocket propellant (RP-1 fuel) has been measured with a coaxial-cylinder (steady-state) technique. Measurements were made in the temperature range from (292 to 732) K and at pressures up to 60 MPa. The total uncertainty of thermal

A Fiber Placement Device and Methodology for preparing 2-D and 3-D Combinatorial Microcomposites

May 5, 2009

Author(s)

Jae Hyun Kim, John W. Hettenhouser, Chang K. Moon, Gale A. Holmes

… of uniformly spaced 3-D microcomposites with (6 to 20) um diameter fibers is new. In addition, the concept of …

IR Spectral Characterization of Customer Blackbody Sources: First Calibration Results

October 16, 2008

Author(s)

Sergey Mekhontsev, Mart Noorma, A Prokhorov, Leonard Hanssen

… range of 232 C to 962 C and spectral range of 2.5 m to 20 m. We discuss the scale realization process that includes …

Issues and Trends in Legal Metrology (from a U.S. Perspective)

October 16, 2008

Author(s)

Charles D. Ehrlich, H V. Oppermann

… likely to change significantly over the next 10 years to 20 years. Exponential increase in the use of technology in …

NIST Special Database 6. NIST Structured Forms Reference Set of Binary Images II (SFRS2)

October 16, 2008

Author(s)

Michael Garris

… contain two pages or form faces; therefore, there are 20 different form faces represented in the database.The …

The Craze Growth Response in Stress Relaxation Conditions for a Styrene-Acrylonitrile Copolymer During Physical Aging

October 16, 2008

Author(s)

M Delin, G B. McKenna

… rates themselves, were found to vary by within a band, 20 % of the means. …

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