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Search Publications

NIST Authors in Bold

Displaying 29501 - 29525 of 73697

Description and Results of 2002 Organic Intercomparison ExercisesExercise Materials: Fish Homogenate V (QA02FSH5) Marine Sediment XI (QA02SED11)

October 16, 2008
Author(s)
Michele M. Schantz, John Kucklick, Reenie M. Parris, Dianne L. Poster, Stephen Wise
In support of marine monitoring measurement programs, the National Institute of Standards and Technology (NIST) conducts yearly interlaboratory comparison exercises to provide one mechanism for participating laboratories/monitoring programs to evaluate the

Description and Results of the 2005 NIST/NOAA Interlaboratory Comparison Exercise Program for Organic Contaminants in Marine Mammal Tissues

October 16, 2008
Author(s)
John Kucklick, Rebecca Pugh, Paul R. Becker, Michele M. Schantz, Stephen Wise, T K. Rowles
The National Institute of Standards and Technology (NIST), in support of the National Oceanic and Atmospheric Administration s Marine Mammal Health and Stranding Response Program (NOAA/MMHSRP), conducts annual interlaboratory comparison exercises for the

Detection of Pinholes in Magnetic Tunnel Junctions by Magnetic Coupling

October 16, 2008
Author(s)
Philip Pong, Cindi L. Dennis, Audie M. Castillo, Andrew P. Chen, William F. Egelhoff Jr.
Pinholes in tunnel barriers are detrimental to the performance of magnetic tunnel junctions (MTJ) since they create direct magnetic exchange coupling between the free and pinned magnetic films and may act as current short circuits. A simple and

Development of the Atomic and Molecular Data Markup Language for Internet Data Exchange

October 16, 2008
Author(s)
Y Ralchenko, R Clark, D Humbert, David R. Schultz, T Kato, Y J. Rhee
Accelerated development of the Internet technologies, including those relevant to the atomic and molecular physics, poses new requirements for the proper communication between computers, users and applications. To this end, a new standard for atomic and

DHS Leads the Way to Standards for Homeland Security

October 16, 2008
Author(s)
Laurie E. Locascio
In late April 2005, in response to a recently issued GAO report describing the urgent need for standards and validated methods related to biological incident response, Dr. Bert Coursey, head of the Standards Portfolio at DHS, charged NIST with the task of

Diameter Dependent Transport Properties of GaN Nanowire Field Effect Transistors

October 16, 2008
Author(s)
Abhishek Motayed, Mark D. Vaudin, Albert Davydov, John Meingailis, Maoqi He, S N. Mohammad
We report transport properties measurements of individual GaN nanowire field effect transistors and the correlation of the electron mobilities with the existence of grain boundaries in these nanowires. These nanowires are grown by direct reaction of NH3

Dielectric and Thermal Properties of Multi-Layer Polymer Films

October 16, 2008
Author(s)
W Sakai, T Yoshiji, N Tsutsumi, C. K. Chiang
The dielectric and thermal properties of three-layer structured films were studied. The two outer layers were about one microns and the thickness of middle layer was varied. We measured the thickness dependence of the dielectric constant of the three-layer

Dielectric Measurement Methods at Millimeter Wave Frequencies

October 16, 2008
Author(s)
Michael D. Janezic
We review several techniques for making accurate relative permittivity and loss tangent measurements of low-loss dielectric materials at frequencies between 30 and 100 GHz. Many conventional methods that operates at microwave frequencies are impracatical

Diffuse Reflectance of Sintered and Pressed Polytetrafluroethylene (PTFE)

October 16, 2008
Author(s)
P Y. Barnes, E A. Early
Polytetrafluoroethylene (PTFE) is widely used in applications requiring a material with a diffuse reflectance factor close to unity. The bidirectional reflenctance distribution function (BRDF) of both pressed and sintered samples was measured as a function

Diffusional Creep: Stresses and Strain Rates in Thin films and Multilayers

October 16, 2008
Author(s)
Daniel Josell, Timothy P. Weihs, H Gao
In this article, we discuss creep deformation as it relates to thin films and multilayer foils. We begin by reviewing experimental techniques for studying creep deformation in thin-film geometries, listing the pros and cons of each; then we discuss the use

Digital Rights, Risk and Assurance

October 16, 2008
Author(s)
Gordon E. Lyon
A trust and assurance perspective applies readily to the distribution of digital products over the Internet: It identifies when digital rights remain viable, even with eventual mishaps and leaks that attend every long-term operation. An assurance system

Directional Solidification in a AgCuSn Eutectic Alloy

October 16, 2008
Author(s)
Robert J. Schaefer, D J. Lewis
An experimental study of microstructures in a directionally solidified, near-eutectic solder Ag-Cu-Sn alloy has been completed. This material is an important candidate for use as a lead-free solder, and the studies show the origin and velocity dependence

Discrete Variable Representations for Singular Hamiltonians

October 16, 2008
Author(s)
B I. Schneider, N Nygaard
We discuss the application of the Discrete Variable Representation to Schr dinger problems which involve singular Hamiltonians. Unlike recent authors which invoke transformations to rid the eigenvalue equation of singularities at the cost of added

Dispersion and Shear Viscosity of a Simulated Polymer Nanocomposite

October 16, 2008
Author(s)
Francis W. Starr, Jack F. Douglas, S C. Glotzer
Using molecular dynamics simulations, we explore properties affecting nano-filler dispersion in a dense bead-spring polymer melt, and how the state of dispersion alters the response of the system to shear. We determine a simple metric to determine the

Dissolution Dynamics of Artificially Structured Materials

October 16, 2008
Author(s)
M Shima, L Salamanca-Riba, Thomas P. Moffat
The anodic dissolution of an ultrathin cobalt film buried beneath a copper overlayer has been studied using voltammetry and chronoamperometry. The films were produced by sequential electrodeposition of cobalt and copper layers from a solution of 1.5 mol/L

Distant Entanglement with Nearest Neighbor Interactions

October 16, 2008
Author(s)
G K. Brennen
Preparing many body entangled states efficiently using available interactions is a challenging task. One solution may be to couple a system collectively with a probe that leaves residual entanglement in the system. We investigate the entanglement produced
Displaying 29501 - 29525 of 73697
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