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Displaying 36901 - 36925 of 73929

Approximate Self-Consistent Potentials for Density-Functional-Theory Exchange-Correlation Functionals

April 1, 2005

Author(s)

Mauricio Cafiero, Carlos A. Gonzalez

We show that potentials for exchange-correlation functionals within the Kohn-Sham Density Functional Theory framework may be written as potentials for simpler functionals multiplied by a factor close to unity, and in a self-consistent field calculation

Approximate Theory of Microwave Generation in a Current-Driven Magnetic Nano-contact Magnetized in an Arbitrary Direction

April 1, 2005

Author(s)

Pavel Kabos, Andrei N. Slavin

An approximate analytic theory of microwave generation by spin-polarized direct current in a magnetic nano-contact magnetized in an arbitrary direction is developed. It is shown that whent he spin-transfer torque caused by spin-polarized current

Assessment of the Role of Filler Size in Amorphous Calcium Phosphate Filled Methacrylate Dental Composites (Poster)

April 1, 2005

Author(s)

Joseph M. Antonucci, Drago Skrtic

The goal of this study was to assess the effects of the ACP s filler particle size on the physicochemical and mechanical properties of EBPADMA-based composites. The experimental resin was formulated from the commercially available monomers: EBPADMA, tri

Beyond English

April 1, 2005

Author(s)

Donna K. Harman

This chapter summarizes TREC work on retrieval for language other than English. TREC has explored a variety of tasks including both single language tasks (for example, retrieving Chinese documents using Chinese queries) and cross-language tasks (such as

Blends From In Situ Photopolymerization of Poly(ethylene Glycol) Dimethacrylate Polylactide Mixtures (Poster)

April 1, 2005

Author(s)

K J. Zhang, Carl Simon Jr., Joseph M. Antonucci, Sheng Lin-Gibson

Miscible or partially miscible blends of crosslinked-PEGDMA and PLA were prepared using a unique combination of mixing and photo-polymerization processes. Through careful selection of components and the control of processing conditions, the properties of

Calculations of Stopping Powers of 100 eV to 30 keV Electrons in Ten Elemental Solids

April 1, 2005

Author(s)

S Tanuma, Cedric J. Powell, David R. Penn

We present calculated electron stopping powers (SPs) for ten elemental solids (Al, Si, Cr, Ni, Cu, Ge, Pd, Ag, Pt, and Au). These calculations were made for electron energies between 100 eV and 30 keV, and were obtained using the same basic algorithm as

Calibrated 200 GHz Waveform Measurement

April 1, 2005

Author(s)

Dylan Williams, Paul D. Hale, Tracy S. Clement

We develop a method for mismatch-correcting temporal waveforms measured with a high-speed electro-optic sampling system. The new calibration characterizes the source in both the time and frequency domains, and accounts for all impedances and multiple

Characterization of Thin Films on the Nanometer Scale by Auger Electron Spectroscopy and X-Ray Photoelectron Spectroscopy

April 1, 2005

Author(s)

Cedric J. Powell, Aleksander Jablonski, W S. Werner, W Smekal

We describe two NIST databases that can be used to characterize thin films from Auger-electron spectroscopy (AES) and X-ray photoelectron spectroscopy (XPS) measurements. First, the NIST Electron Effective-Attenuation-Length Database provides values of

Chemical Imaging of Heterogeneous Polymeric Materials With Near-Field IR Microscopy

April 1, 2005

Author(s)

Chris A. Michaels, D B. Chase, Stephan J. Stranick

The development of techniques to probe spatial variations in chemical composition on the nanoscale continues to be an important area of research in the characterization of polymeric materials. Recent efforts have focused on the development and

Combinatorial Approach to the Edge Delamination Test for Thin Film Reliability - Adaptibility and Variability

April 1, 2005

Author(s)

Martin Y. Chiang, R Song, A J. Crosby, Alamgir Karim, C. K. Chiang, Eric J. Amis

In this study, a high-throughput combinatorial approach to edge delamination test is proposed to map the failure of adhesion as a function of both temperature and film thickness in a single step. In this approach, a single specimen of a thin film bonded to

Combinatorial Methods to Access Cellular Response to Bis-GMA/TEGDMA Vinyl Conversion Levels

April 1, 2005

Author(s)

Nancy J. Lin, L A. Bailey, N Washburn

To facilitate the evaluation of dental composites, high throughput methods to fabricate dental resins with varying conversion levels were developed. Resins of 2,2-bis[4-(2-hydroxy-3-methacryloxypropoxy) phenyl]propane (Bis-GMA) and triethylene glycol

Composition of Engineering Web Services with Distributed Data Flows and Computations

April 1, 2005

Author(s)

D. Liu, J Peng, K Law, G Wiederhold, Ram D. Sriram

This paper describes an experimental Flow-based Infrastructure for Composing Autonomous Services (FICAS), which supports a service-composition paradigm that integrates loosely-coupled software components. For traditional software service composition

Controlled Electrophoretic Patterning of Polyaniline From a Colloidal Suspension

April 1, 2005

Author(s)

Guofeng Li, C Martinez, Stephen Semancik

We present a method for controlled deposition of polyaniline from its colloidal suspension. The stable suspension of polyaniline colloids (~ 115 nm in diameter) was formed by dispersing polyaniline/formic-acid solution into acetonitrile. It was

Cross-Dimensional Relaxation in Bose-Fermi Mixture

April 1, 2005

Author(s)

J Goldwin, S Inouye, M L. Olsen, Deborah S. Jin

We consider the equilibration rate for fermions in Bose-Fermi mixtures undergoing cross-dimensional rethermalization. Classical Monte Carlo simulations of the relaxation process are performed over a wide range of parameters, focusing on the effects of the

Development and Certification of NIST Standard Reference Materials for Relative Raman Intensity Calibration

April 1, 2005

Author(s)

E S. Etz, Steven J. Choquette, Wilbur S. Hurst

In the practice of analytical Raman spectroscopy, it becomes increasingly important to employ a procedure for the correction of the relative intensity of Raman spectra. The determination of the intensity response function of a Raman instrument

Direct Resistance Comparisons From the QHR to 100 Megohm Using a Cryogenic Current Comparator

April 1, 2005

Author(s)

Randolph Elmquist, Emmanouel S. Hourdakis, Dean G. Jarrett, Neil M. Zimmerman

Measurements of 100 megohm standard resistors and cryogenic thin-film resistors based directly on a QHR standard have been made with a cryogenic current comparator (CCC) bridge. This 15496:2 ratio CCC attains a current sensitivity of 10.7 fA/Hz1/2 in

Evaluation of Carbon Dioxide as R22 Substitute for Residential Conditioning (in Polish) - Part 2

April 1, 2005

Author(s)

J S. Brown, Y Kim, Piotr A. Domanski

This paper compares performance of CO2 and R22 in residential air conditioning applications using semi-theoretical vapor compression and transcritical cycle models. The simulated R22 system had a conventional component configuration, while the CO2 system

Experiments Toward Non-Contact Safety Standards for Automated Industrial Vehicles

April 1, 2005

Author(s)

Roger V. Bostelman, Tsai Hong Hong, Rajmohan Madhavan

The performance evaluation of an obstacle detection and segmentation algorithm for Automated Guided Vehicle (AGV) navigation in factory-like environments using a new 3D real-time range camera is the subject of this paper. Our approach expands on the US

Extension of the Bloch T^3/2^ Law to Magnetic Nanostructures: Bose-Einstein Condensation

April 1, 2005

Author(s)

Edward Della Torre, Lawrence H. Bennett, R E. Watson

The Bloch spin-wave T law for the temperature dependence of magnetization 3/2 is one of the most fundamental in the theory of ferromagnetism. An experimental upturn (break in slope) from the T law in the magnetization has 3/2 been observed in

Fast Setting Calcium Phosphate-Chitosan Scaffold: Mechanical Properties and Biocompatibility

April 1, 2005

Author(s)

H H. Xu, Carl Simon Jr.

Genetic Cellular Responses to Tyrosine-Derived Polycarbonate Blends

April 1, 2005

Author(s)

L A. Bailey, Matthew Becker, James A. Cooper, J Kohn, Eric J. Amis

The evaluation and identification of detrimental interactions between biological species and synthetic surfaces is a daunting challenge as the number of materials and control of physical variables increases. In this talk, the physical properties of

Hamiltonian Paths Through Two- and Three-Dimensional Grids

April 1, 2005

Author(s)

William F. Mitchell

This paper addresses the existence of Hamiltonian paths and cycles in two-dimensional grids consisting of triangles or quadrilaterals, and three-dimensional grids consisting of tetrahedra or hexahedra. The paths and cycles may be constrained to pass from

Implementing the Health Insurance Portability and Accountability Act (HIPAA) Security Rule

April 1, 2005

Author(s)

Joan Hash

This ITL Bulletin helps to educate readers about the HIPAA Security Rule and to improve understanding of the meaning of the security standards set out in the Security Rule. This publication is also designed to direct readers to helpful information in other

Improved Capacitance Measurements with Respect to a 1 pF Cross Capacitor from 200 Hz to 2000 Hz

April 1, 2005

Author(s)

Yicheng Wang, Scott H. Shields

We describe frequency dependence measurements of fused-silica capacitance standards from 200 Hz to 2000 Hz, using a 1 pF cross capacitor as the reference. Frequency dependence of fused-silica capacitors varies significantly, ranging from a change of less

Interfaces for Personal Identity Verification

April 1, 2005

Author(s)

James F. Dray Jr., Scott Guthery, Teresa T. Schwarzhoff

[Superseded by SP 800-73-1 (March 2006): http://www.nist.gov/manuscript-publication-search.cfm?pub_id=150633] SP 800-73 specifies smart card interfaces used to retrieve and use identity credentials. These specifications reflect the design goals of

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