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Displaying 27076 - 27100 of 74071

Time and Frequency Users Manual

September 2, 2009
Author(s)
Michael A. Lombardi
This book is for the person who needs information about making time and frequency measurements. It is written at a level that will satisfy those with a casual interest as well as laboratory engineers and technicians who use time and frequency every day. It

Toward a standard on the wind tunnel method

September 2, 2009
Author(s)
Emil Simiu
This document is intended to provide practicing engineers and building code officials with a technical resource that (i) describes current practices for the testing of buildings and other structures in flows simulating natural winds, (ii) provides a basis

A New 26plex Autosomal STR Assay to Aid Human Identity Testing*(dagger)

September 1, 2009
Author(s)
Carolyn R. Steffen, John M. Butler, Peter Vallone
Multiplex polymerase chain reaction (PCR) has become the standard in forensic testing. Currently there are two commercial multiplex PCR amplification kits available that simultaneously amplify 16 short tandem repeat (STR) loci that include the 13 FBI

Analog BIST Functionality for Microhotplate Temperature Sensors

September 1, 2009
Author(s)
Muhammad Y. Afridi, Christopher B. Montgomery, Elliott cooper-Balis, Stephen Semancik, Kenneth G. Kreider, Jon C. Geist
In this paper we describe a novel microhotplate temperature sensor calibration technique suitable for Built-In Self Test. The technique only requires short-term temperature stability from the four-wire polysilicon heater/temperature sensors that are

Eigenpath Traversal by Phase Randomization

September 1, 2009
Author(s)
S. Boixo, Emanuel Knill, Rolando Somma
A computation in adiabatic quantum computing is achieved by traversing a path of nondegenerate eigenstates of a continuous family of Hamiltonians. We introduce a method that traverses a discretized form of the path: at each step we evolve with the

First-Principles Calculation of the Third Virial Coefficient of Helium

September 1, 2009
Author(s)
Allan H. Harvey, Giovanni Garberoglio
Knowledge of the pair and three-body potential-energy surfaces of helium is now sufficient to allow calculation of the third density virial coefficient, C(T), with significantly smaller uncertainty than that of existing experimental data. In this work, we

High-efficiency photon-number resolving detectors based on hafnium transition-edge sensors

September 1, 2009
Author(s)
Adriana E. Lita, Brice R. Calkins, Lenson Pellouchoud, Aaron J. Miller, Sae Woo Nam
Generation of non-classical states of light is at the foundation of numerous quantum optics experiments and optical quantum information processing implementations. One such non-Gaussian optical quantum state can be obtained by photon subtraction from a

Information Management Gaps for Board Fabrication and Assembly

September 1, 2009
Author(s)
Eric D. Simmon, Jeff Pettinato
There are a number of driving forces that are impacting the information management needs of the board fabrication and assembly segments. The electronics industry is expanding beyond traditional industry boundaries at the same time it is shifting to a

Internal Curing Improves Concrete Performance throughout its Life

September 1, 2009
Author(s)
Ryan Henkensiefken, Javier Castro, Haejin Kim, Dale P. Bentz, Jason Weiss
Internal curing (IC) provides a set of water reservoirs within the concrete to prevent self-desiccation and promote hydration. While early research in this area focused on reductions in early-age deformation and cracking, recent efforts have demonstrated

Microwave Spectrum of 1,2-Propanediol

September 1, 2009
Author(s)
Francis J. Lovas, David F. Plusquellic, Brooks Pate, Justin L. Neill, Matt T. Muckle, Anthony J. Remijan
The microwave spectrum of the sugar alcohol 1,2-propanediol (CH3CHOHCH2OH) has been measured over the frequency range 6.5 GHz to 25.0 GHz with several pulsed-beam Fourier-transform microwave spectrometers. Seven conformers of 1,2-propanediol have been

Modeling Microstructures with OOF2

September 1, 2009
Author(s)
Andrew C. Reid, Rhonald Lua, R E. Garcia, Valerie R. Coffman, Stephen A. Langer
OOF2 is a program for computing the properties and behavior of material microstructures, beginning with an image of the microstructural geometry. OOF2 uses finite elements, but is designed to be used by materials scientists with little or no finite element

Nanometrology Solutions Using an Ultra-High Resolution In-lens SEM

September 1, 2009
Author(s)
Michael T. Postek, Andras Vladar, John S. Villarrubia
The imaging and measurement of nanostructures such as particles, carbon nanotubes, and quantum dots have placed new demands on the high resolution imaging capabilities of scanning electron microscopes. A barrier to accurate dimensional metrology is the

Outdoor-to-Indoor Channel Measurements and Models

September 1, 2009
Author(s)
Catherine A. Remley, Christopher L. Holloway, David W. Matolak
This document reports on wireless channel measurements and models for outdoor to indoor propagation environments. Although there have been a number of publications that have recently appeared on this topic, e.g., [1], [2], and references therein, the

Perturbations from Ducts on the Modes of Acoustic Thermometers

September 1, 2009
Author(s)
Keith A. Gillis, Michael R. Moldover, Hong Lin
We examine the perturbations of the modes of an acoustic thermometer caused by circular ducts used either for gas flow or as acoustic waveguides coupled to remote transducers. We calculate the acoustic admittance of circular ducts using a model based on

Report of the Sixth Interlaboratory Comparison Organized by the Community Reference Laboratory for Heavy Metals in Feed and Food

September 1, 2009
Author(s)
Lane C. Sander, Stephen E. Long, Steven J. Christopher, Russell D. Day, Karen E. Murphy, F. Cordeiro, T. Linsinger, H. Emteborg, I. Verbist, D. Vendelbo, P. Taylor, M. B. de la Calle
The Institute for Reference Materials and Measurements (IRMM) of the Joint Research Centre (JRC), a Directorate-General of the European Commission, operates the Community Reference Laboratory for Heavy Metals in Feed and Food (CRL-HM). One of its core
Displaying 27076 - 27100 of 74071