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Displaying 31801 - 31825 of 73461

Selectable Resistance-Area Product by Dilute Highly Charged Ion Irradiation

August 13, 2007

Author(s)

Joshua M. Pomeroy, Holger Grube, A C. Perrella, John D. Gillaspy

In order to provide high performance read heads for future hard drive densities, considerable effort worldwide has been invested in developing techniques for producing low resistance area product (RA) magnetic tunnel junction sensors. In this letter, we

Data Modeling to Support Environmental Information Exchange Throughout the Supply Chain

August 11, 2007

Author(s)

John V. Messina, Eric D. Simmon

With an ever-increasing awareness of the environmental impact of manufacturing, more and more political organizations (countries, states, and unions) are enacting legislation designed to protect the environment. One category of this restrictive legislation

Making Batch-Mode Size Measurements of Nanoparticles in Aqueous Media Using Dynamic Light Scattering

August 11, 2007

Author(s)

Vincent A. Hackley, Jeffrey D. Clogston

Optical Lattice Polarization Effects on Magnetically Induced Atomic Clock Transitions

August 10, 2007

Author(s)

A. V. Taichenachev, V. I. Yudin, Christopher W. Oates

We derive the frequency shift for a forbidden optical transition $J$=0$\to$$J$=0 caused by the simultaneous action of an elliptically polarized lattice field and a static magnetic field. We find that a simple configuration of lattice and magnetic fields

Controlled Protein Release From High-Strength Calcium Phosphate Cement-Chitosan Composites

August 9, 2007

Author(s)

Michael Weir, Hockin D. Xu

Calcium phosphate cement (CPC) can conform to complex cavity shapes and set in situ to form bioresorbable hydroxyapatite. The aim of this study was to develop a mechanically-strong CPC with protein release; and to control protein release via

Nanoscale measurements of Poisson's ratio with contact-resonance atomic force microscopy

August 9, 2007

Author(s)

Donna C. Hurley, J Turner

We describe contact-resonance atomic force microscopy (AFM) methods to quantitatively measure Poisson's ratio v or shear modulus G at the same time as Young's modulus E. In contact-resonance AFM, the frequencies of the cantilever's resonant vibrations are

Spectroscopic Determination of Phase in Tetragonally Strained Ba 0.5 Sr 0.5 TiO 3 Films at Room Temperature

August 9, 2007

Author(s)

L M B Alldredge, Joseph Woicik, W Chang, S W. Kirchoefer, J M. Pond

Sputter-deposited Ba0.5Sr0.5TiO3 films on MgO(001) substrates with either in-plane (c a) tetragonal lattice distortions were characterized by polarization-dependent Ti K-edge x-ray absorption fine-structure (XAFS) spectroscopy and microwave dielectric

Accommodation of Transformation Strains in Transverse Multiferroic Nanostructures CoFe2O4-PbTiO3

August 6, 2007

Author(s)

Julia Slutsker, Jianhua Li, Zhuopeng Tan, Alexander L. Roytburd

Correlated photon-pair generation in reverse-proton-exchange PPLN waveguides with integrated mode demultiplexer at 10 GHz clock

August 6, 2007

Author(s)

Qiang Zhang, Xiuping Xie, Hiroki Takesue, Sae Woo Nam, Carsten Langrock, M. M. Fejer, Yoshihisa Yamamoto

We report 10-ps correlated photon pair generation in periodically-poled reverse-proton-exchange lithium niobate waveguides with integrated mode demultiplexer at a wavelength of 1.5-υm and a clock of 10 GHz. Using superconducting single photon detectors, we

Coupling Nanowire Chemiresistors With Microhotplate Platforms for Advanced Gas Sensing

August 6, 2007

Author(s)

Douglas C. Meier, Stephen Semancik, Bradley Button, Eugene Strelcov, Andrei Kilmakov

Recent advances in nanotechnology have yielded new materials and structures that offer great potential for improving sensitivity, selectivity and stability of the next generation of chemical gas sensors. To successfully fabricate practical devices, the

Microstructure of 100 nm damascene copper overburden and lines studied by electron backscatter diffraction

August 6, 2007

Author(s)

Roy H. Geiss, David T. Read

A detailed understanding of the crystallography of metallic conductors in modern interconnect systems is essential if we are to understand the influence of processing parameters on performance and reliability. In particular we must be able to evaluate the

Nanowire Electromechanical Logic Switch

August 5, 2007

Author(s)

Qiliang Li, Curt A. Richter, Hao Xiong, John S. Suehle

Random Telegraph Signals and 1/f Noise in ZnO Nanowire Field Effect Transistors

August 5, 2007

Author(s)

Hao Xiong, Wenyong Wang, Qiliang Li, Curt A. Richter, John S. Suehle, Woong-Ki Hong, Takhee Lee, Daniel M. Fleetwood

Classical Radionuclidic Calorimetry

August 2, 2007

Author(s)

Ronald Colle

This brief survey summarizes the principles and practice of classical isothermal microcalorimetry for the primary standardization of the activity of radionuclides. Its advantages and some potential problems are highlighted through the discussion of several

Interactions of Dispersive Shock Waves

August 2, 2007

Author(s)

Mark Hoefer, Mark J. Ablowitz

Interactions and collisions of dispersive shock waves in defocusing (repulsive) nonlinear Schrodinger-type systems are investigated analytically and numerically. Two canonical cases are considered. In one case, two counter-propagating dispersive shock

Permanent-Magnet-Free Stabilization and Sensitivity Tailoring of Magneto-resistive Field Sensors

August 2, 2007

Author(s)

Sean Halloran, Fabio C. da Silva, Hamid Z. Fardi, David P. Pappas

In this work, we have exploited the coupling across a ruthenium spacer between a ferromagnetic layer and an antiferromagnetic layer to stabilize the magnetization and tailor the magnetic gain of the sensor for various applications. Because the structure is

Permanent-Magnet-Free Stabilization and Sensitivity Tailoring of Magneto-resistive Field Sensors

August 2, 2007

Author(s)

Sean Halloran, Fabio C. da Silva, Hamid Z. Fardi, David P. Pappas

The Realization of the SI Second and Generation of UTC(NIST) at the Time and Frequency Division of the National Institute of Standards and Technology (NIST)

August 2, 2007

Author(s)

Thomas P. Heavner, Steven R. Jefferts

The Time and Frequency Division of the National Institute of Standards and Technology (NIST) maintains the laser-cooled Cesium primary fountain frequency standard NIST-F1. NIST-F1 is used to accurately realize the SI second, defined as 9,192,631,770

BEES 4.0: Building for Environmental and Economic Sustainability. Technical Manual and User Guide

August 1, 2007

Author(s)

Barbara C. Lippiatt

The BEES (Building for Environmental and Economic Sustainability) version 4.0 software implements a rational, systematic technique for selecting environmentally-preferred, cost-effective building products. The technique is based on consensus standards and

Calibrating Image Roughness by Estimating Lipschitz Exponents, with Applications to Image Restoration

August 1, 2007

Author(s)

Alfred S. Carasso, Andras Vladar

Most commonly occurring images f(x,y) are not smoothly differentiable functions of the variables x and y. Rather, these images display edges, localized sharp features, and other significant fine scale details or texture. Correct characterization and

Characterization of degradation mechanisms in neural recording electrodes

August 1, 2007

Author(s)

Jennifer Anton, Stephanie A. Hooker

Understanding the nature of specific neural activity is essential to the progression of research in the field of brain disorders and diseases, as well as neuroprosthetics. Microelectrodes are the primary measurement devices used to transduce neural

Comparison of the Currents Induced on an EUT in a TEM Cell to Those Induced in a Free-Space Environment

August 1, 2007

Author(s)

Per E. Fornberg, Christopher L. Holloway

The finite-difference time-domain (FDTD) method is used to investigate whether the currents induced on equipment under test (EUT) in a transverse electromagnetic (TEM) cell are similar to those induced in a free-space environment. The approach is to

Confidence Through Comparing Vector Network Analyzer Measurements - The ARFTG Measurement Comparison Program

August 1, 2007

Author(s)

Ronald A. Ginley

This paper describes the ARFTG scattering parameter Measurement Comparison Program (MCP) which is supported by NIST. The ARFTG MCP is designed specifically to allow users of vector network analyzers to compare their measurements to those of their peers

Correction of Location and Orientation Errors in Electromagnetic Motion Tracking

August 1, 2007

Author(s)

John G. Hagedorn, Steven G. Satterfield, John T. Kelso, W. Austin, Judith E. Terrill, Adele Peskin

We describe a method for calibrating an electromagnetic motion tracking device. Algorithms for correcting both location and orientation are presented. In particular, we use a method for interpolating rotation corrections at scattered data points that has

Cryptographic Algorithms and Key Sizes for Personal Identity Verification

August 1, 2007

Author(s)

William T. Polk, Donna F. Dodson, William E. Burr

[Superseded by SP 800-78-2(February 2010): http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904962] SP 800-78-1 has been modified to enhance interoperability, simplify the development of relying party applications, and enhance alignment with

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