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Displaying 18151 - 18175 of 74297

Fire Modeling for the Fire Research, Fire Protection, and Fire Service Communities

September 8, 2014
Author(s)
Kevin B. McGrattan, Randall J. McDermott, Glenn P. Forney, Kristopher J. Overholt, Craig G. Weinschenk, Jason E. Floyd
The Fire Dynamics Simulator (FDS) was first publicly released in 2000, and it has recently undergone its fifth major revision. Since its first release, FDS has been applied in three major areas: basic research in fire dynamics, performance-based design

Foam Composite Specifications and Qualification in Support of NIJ 0115.00

September 8, 2014
Author(s)
Aaron M. Forster, Emilien J. Guigues, Amanda L. Forster, Jeffrey M. Davis, Kirk D. Rice
A laminate foam composite is recommended in the National Institute of Justice (NIJ) 0115.00 standard as the backing material for testing stab resistant body armor. The foam specification originated from early work to match force-displacement profiles from

Robust Ferromagnetism in the Compressed Permanent Magnet Sm 2 Co 17

September 8, 2014
Author(s)
Jason R. Jeffries, L.S.I. Veiga, G. Fabbris, D. Haskel, P. Huang, Nicholas Butch, S.K. McCall, K. Holliday, Z. Jenei, Y. Xiao, P. Chow
The compound Sm 2Co 17 displays magnetic properties amenable to permanent magnet applications owing to both the 3d-electrons of Co and the 4f-electrons of Sm. The long-standing description of the magnetic interactions between the Sm and Co ions implies a

Environment-assisted quantum control of a solid state spin via 2-color coherent dark states

September 7, 2014
Author(s)
Jacob M. Taylor, Jack Hansom, Carsten Schulte, Claire Le Gall, Clemens Matthiesen, Edmund Clarke, Maxime Hugues, Mete Atature
Semiconductor quantum dots (QDs) offer an efficient and scalable interface between single spins and optical photons. However, the solid-state environment of the QD represents an inherent source of noise, generally considered detrimental to coherent control

Selective Area Growth of Ga- and N-polar GaN Nanowire Arrays on Non-Polar Si (111) Substrates

September 7, 2014
Author(s)
Matthew D. Brubaker, Shannon M. Duff, Todd E. Harvey, Paul T. Blanchard, Alexana Roshko, Aric W. Sanders, Norman A. Sanford
This study presents a technique for obtaining Ga- and N-polar Gallium Nitride nanowire (GaN NW) arrays on non-polar Si (111) substrates by use of polarity-controlled AlN/GaN buffer layers. AlN films are demonstrated to adopt Al-/N-polarity for N-/Al-rich

Computer Security Division 2013 Annual Report

September 4, 2014
Author(s)
Patrick D. O'Reilly, Gregory A. Witte, Chris Johnson, Doug Rike
Title III of the E-Government Act of 2002, entitled the Federal Information Security Management Act (FISMA) of 2002, requires NIST to prepare an annual public report on activities undertaken in the previous year, and planned for the coming year, to carry

New AGV Capabilities are Safety Driven

September 3, 2014
Author(s)
Roger V. Bostelman, William P. Shackleford
Current automated guided vehicle (AGV) technology typically provides material handling flow along single or dual opposing-flow lanes in manufacturing and distribution facilities. An AGV stops for most any obstacle that may be in its path which then stops

Nonlinear resonant acoustic detection of cracks in multilayer ceramic capacitors

September 3, 2014
Author(s)
Ward L. Johnson, Sudook A. Kim, Grady S. White, Jaemi Herzberger
Abstract—Measurements of resonant ultrasonic frequencies of multilayer ceramic capacitors (MLCC) were performed as a function of excitation amplitude to assess the potential of nonlinear acoustic methods for sensing the presence of cracks. The ultimate

Image Quality Testing: Selection of Images for Assessing Test Subject Input

September 2, 2014
Author(s)
John R. Jendzurski, Nicholas G. Paulter Jr.
Determining image quality is dependent to some degree on human interpretation. Although entirely subjective methods of evaluating image quality may be adequate for consumer applications, they are not acceptable for security and safety applications where

Pairwise Alignment of Chromatograms using a Fisher-Rao Metric

September 2, 2014
Author(s)
William E. Wallace, Anuj Srivastava, Kelly H. Telu, Yamil Simon
A new approach to aligning chromatograms is introduced and applied to examples of metabolite identification by liquid chromatography mass spectrometry (LC MS). A square root representation of the chromatogram’s derivative coupled with a Fisher Rao

A 40 GHz Air-Dielectric Cavity Oscillator with Low Phase Modulation

September 1, 2014
Author(s)
Archita Hati, Craig W. Nelson, Billy F. Riddle, David A. Howe
We describe the design of a low-phase modulated (PM) noise, 40 GHz oscillator that uses a conventional air-dielectric cavity resonator as a frequency discriminator to improve the PM noise of a commercial 10 GHz dielectric resonator oscillator (DRO)

Absorption Characteristics and SAR of a Lossy Sphere inside a Reverberation Chamber

September 1, 2014
Author(s)
Christopher L. Holloway, Damir Senic, John M. Ladbury, Galen H. Koepke
This study presents an experimental approach to the analysis of absorption characteristics of a lossy dielectric object in a reverberant environment. The study used a canonically shaped water-filled sphere, convenient for ACS calculations (analytical or by

Advanced Topics in Forensic DNA Typing: Interpretation (textbook)

September 1, 2014
Author(s)
John M. Butler
This book is primarily intended for DNA analysts or those trying to understand what a DNA analyst does in his or her review of forensic DNA data that was obtained by polymerase chain reaction (PCR) amplification and short tandem repeat (STR) typing via
Displaying 18151 - 18175 of 74297