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NIST Authors in Bold

Displaying 32501 - 32525 of 73697

Towards Industrial Scale Fabrication of Nanowire-Based Devices

April 11, 2007
Author(s)
Babak Nikoobakht
The key requirements for mass fabrication of nanodevices are directed positioning and alignment of nanoparticles (e.g., nanowires) with known registries on a large scale. Here, these issues are addressed in a high throughput and scalable approach for

Objective Test and Performance Measurement of Automotive Crash Warning Systems

April 10, 2007
Author(s)
Sandor S. Szabo, Richard J. Norcross, Joseph A. Falco
The National Institute of Standards and Technology (NIST), under an interagency agreement with the United States Department of Transportation (USDOT), is supporting development of objective test and measurement procedures for vehicle-based warning systems

Traceable Micro-Force Sensor for Instrumented Indentation Calibration

April 10, 2007
Author(s)
Douglas T. Smith, Gordon A. Shaw, R M. Seugling, D Xiang, Jon R. Pratt
Instrumented indentation testing (IIT), commonly referred to as nanoindentation when small forces are used, is a popular technique for determining the mechanical properties of small volumes of material. Sample preparation is relatively easy, usually

Training and Optimization of Operating Parameters for Flash LADAR Cameras

April 10, 2007
Author(s)
M Price, J Kenney, Roger D. Eastman, Tsai H. Hong
Flash LADAR cameras based on continuous-wave, time-of-flight range measurement deliver fast 3D imaging for robot applications including mapping, localization, obstacle detection and object recognition. The accuracy of the range values produced depends on

Broaband THz aqueous blackbody calibration source

April 9, 2007
Author(s)
Charles Dietlein, Zoya Popovic, Erich N. Grossman
We describe a broadband calibration source for the millimeter-wave to terahertz (THz) frequency range, the Aqueous Blackbody Calibration (ABC) source. The blackbody in this design is a body of water, which is extremely absorptive at these frequencies, held

Performance comparison of Nb and NbN antenna-coupled microbolometers

April 9, 2007
Author(s)
Charles Dietlein, A. Luukanen, J. S. Penttila, H. Sipola, L. Gronberg, H. Seppa, P. Helisto, Erich N. Grossman
We report the experimental results of a comparison between free-standing Nb and NbN microbolometer bridges coupled to equiangular spiral antennas on Si substrates. Because of the difference in material resistivity, bolometer resistance and aspect ratio is

Spectral decomposition of ultra-wide-band terahertz imagery

April 9, 2007
Author(s)
Erich N. Grossman, Charles Dietlein, Jonathan Chisum, A. Luukanen, J. E. Bjarnason, E. R. Brown
We investigate the spectral response of a THz imaging system based on ultrawideband cryogenic microbolometers. The bandwidth if this system, nominally 0.2 - 1.8 THz, is broad enough to span large variations (>10 dB) in clothing transmittance and

A Piezoresistive Cantilever Force Sensor for Direct AFM Force Calibration

April 8, 2007
Author(s)
Jon R. Pratt, John A. Kramar, Gordon A. Shaw, Douglas T. Smith, John M. Moreland
We describe the design, fabrication, and calibration testing of a new piezoresistive cantilever force sensor suitable for the force calibration of atomic force microscopes in a range between tens of nanonewtons to hundreds of micronewtons. The sensor is

Guidelines for Securing Radio Frequency Identification (RFID) Systems

April 6, 2007
Author(s)
Tom T. Karygiannis, Bernard Eydt, Greg Barber, Lynn Bunn, T. Phillips
This publication seeks to assist organizations in understanding the risks of RFID technology and security measures to mitigate those risks. It provides practical, real-world advice on how to initiate, design, implement and operate RFID systems in a manner

TEM Calibration Methods for Critical Dimension Standards

April 5, 2007
Author(s)
Ndubuisi G. Orji, Ronald G. Dixson, B Bunday, M R. Bishop, Michael W. Cresswell, J Allgair
One of the key challenges in critical dimension (CD) metrology is finding suitable calibration standards. Over the last few years there has been some interest in using features measured with transmission electron microscope (TEM) as primary standards for

A Stokes Permeability Solver for Three-Dimensional Porous Media

April 4, 2007
Author(s)
Dale P. Bentz, Nicos Martys
A set of C and Fortran computer programs have been developed for computing the permeability of three-dimensional porous media under incompressible Stokes flow conditions. In this NISTIR, the background for developing these codes is reviewed and the

Recursive Motion Estimation of Range Image

April 4, 2007
Author(s)
Hamid Gharavi, Shaoshuai Gao
In this paper, we present an innovative recursive motion estimation technique that can take advantage of the in-depth resolution (range) to perform an accurate estimation of objects that have undergone 3-D translational and rotational movements. This

A Uniaxial BioMEMS Device for Quantitative Force-Displacement Measurements

April 3, 2007
Author(s)
David Serrell, Tammy L. Oreskovic, Andrew Slifka, Roop L. Mahajan, Dudley Finch
There is a need for experimental techniques that allow the simultaneous imaging of cellular cystoskeletal components with quantitative force measurements on single cells. A bioMEMS device has been developed for the application of strain to a single cell

EQUATION OF STATE AND THERMOPHYSICAL PROPERTIES OF HELIUM-3

April 3, 2007
Author(s)
Yonghua Huang, G.B. Chen, V. Arp, Ray Radebaugh
Experimental data of the thermophysical properties of 3He were mined into a searchable database. Equilibrium equations along the vapor-liquid and liquid-solid lines were proposed. A general equation of state for normal fluid 3He based on the Debye specific

Uniaxial Crushing of Cellular Sandwich Plates Under Air Blast

April 3, 2007
Author(s)
Joseph A. Main, George A. Gazonas
Sandwich plates with cellular metal cores are being widely considered for blast mitigation applications, due largely to the energy absorption capacity of the cellular core material. Computational simulations have shown that sandwich plates exhibit reduced
Displaying 32501 - 32525 of 73697
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