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Displaying 1776 - 1800 of 2915

Methodology for evaluating Static six-degree-of-freedom (6DoF) Perception Systems

October 15, 2010
Author(s)
Tommy Chang, Tsai H. Hong, Joseph Falco, Michael O. Shneier, Milli Shah, Roger D. Eastman
In this paper, we apply two fundamental approaches toward evaluating a static, vision based, six-degree-of-freedom (6DoF) pose determination system that measures the position and orientation of a part. The first approach uses ground\-truth carefully

MgO Tunnel Barriers in Magnetic Nanostructures and Devices

April 28, 2010
Author(s)
Ranko R. Heindl, Matthew Pufall, William Rippard
In recent years, there has been a great deal of success in the development of MgO based tunnel barriers for use in magnetic devices, such as nanoscale magnetic random access memory elements (MRAM) and magnetic field sensors. Much of the focus has been on

Matter-wave self-imaging by atomic center-of-mass motion induced interference

December 18, 2008
Author(s)
Ke Li, Lu Deng, Edward W. Hagley, M.S. Zhan, Marvin G. Payne
We demonstrate matter-wave self-imaging in a stationary light field in the non-Raman-Nath limit. We show that in a non-instantaneous pulsed standing wave grating significant contributions due to the non-negligible atomic center of mass motion and

Accurate Determination of High Energy Gamma-Ray Standards

October 16, 2008
Author(s)
Ernest G. Kessler Jr., Maynard S. Dewey, R Deslattes, Albert Henins, H G. Borner, M Jentschel, H Lehmann
The extension of accurate crystal diffraction spectroscopy to the 2 to 6 MeV region is described. Gamma-ray standards with a relative uncertainty of (2 to 5)x10 -7 are obtained by measuring the small diffraction angles (a few tenths of a degree) through

Image Analysis for High-Throughput Materials Science

October 16, 2008
Author(s)
Alamgir Karim, A Sehgal, J C. Meredith, A J. Crosby, Eric J. Amis
Imaging plays a key role in modern day materials science by providing a high-density format of data representation that can be visually interpreted or processed by the human brain in a fraction of a second. We have illustrated a few select examples-

Why Is Minkowski Spacetime Non-Euclidean?

October 16, 2008
Author(s)
J M. Cronkhite
The geometry of Minkowski spacetime is pseudo-Euclidean, thanks to the time component term being negative in the expression for the four dimensional interval. This fact renders spacetime geometry unintuitive and extremely difficult to visualize. I present

Source Code Security Analysis Tool Functional Specification Version 1.0

May 1, 2007
Author(s)
Paul E. Black, Michael J. Kass, Hsiao-Ming M. Koo
Software assurance tools are a fundamental resource for providing an assurance argument for today?s software applications throughout the software development lifecycle. Some tools analyze software requirements, design models, source code, or executable

Self-Oscillating Rubidium Magnetometer using Nonlinear Magneto-Optical Rotation

December 14, 2005
Author(s)
P Schwindt, Leo W. Hollberg, John E. Kitching
The detection of nonlinear magneto-optical rotation (NMOR) of polarized light through alkali atomic vapor is a highly sensitive technique for measuring magnetic fields. We demonstrate that when using frequency modulated light to excite the NMOR resonance

Spin Nomenclature for Semiconductors and Magnetic Metals

June 1, 2004
Author(s)
B Jonker, A Hanbicki, Daniel T. Pierce, Mark D. Stiles
The different conventions used in the semiconductor and magnetic metals communities can cause confusion in the context of spin polarization and transport in simple heterostructures. In semiconductors, terminology is based on the orientation of the electron

The N 13 , N 5 + N 15 and N 9 + N 15 Bands of 10 B 2 H 6

August 1, 2002
Author(s)
Walter J. Lafferty, J.- M. Flaud, H Berger, G Pawelke
The 5 m absorption region of an isotopically pure sample of diborane 10B 2H 6 has been analyzed using high resolution (0.0025 cm -1) Fourier transform spectra. A set of precise experimental rotational-vibrational energy levels has been obtained for three

Transpinnor: A New Giant Magnetoresistive Spin-Valve Device

April 1, 2002
Author(s)
E J. Torok, S Zurn, S Bae, P J. Chen, William F. Egelhoff Jr., L Sheppard, R Spitzer, J Judy
This paper discusses the fundamental physics and device-operating mechanisms of Transpinnor, a kind of multi-functional active solid state device, newly designed by Integrated magnetoelectronics corporation (IME). The Transpinnor is the modified Wheatstone

The Kilogram and Measurements of Mass and Force

January 1, 2001
Author(s)
Zeina J. Kubarych, Simone L. Yaniv
This paper describes the facilities, measurement capabilities, and ongoing research activities in the areas of Mass and Force at the National Institute of Standards and Technology (NIST). The first section of the paper is devoted to mass metrology and

The Geometric Characterization of Rockwell Diamond Indenters

January 1, 1994
Author(s)
Jun-Feng Song, F Rudder, Theodore V. Vorburger, A Hartman, Brian R. Scace, J Smith
By using a stylus instrument, a series of calibration and check standards, and calibration and uncertainty calculation procedures, we have calibrated Rockwell diamond indenters with a traceability to fundamental measurements. The combined measurement

Universal electronic synthesis by microresonator-soliton photomixing

May 13, 2025
Author(s)
Jizhao Zang, Travis Briles, Jesse Morgan, Andreas Beling, Scott Papp
Access to electrical signals across the millimeter-wave (mmW) and terahertz (THz) bands offers breakthroughs for high-performance applications. Despite generations of revolutionary development, integrated electronics are challenging to scale at 100-1000

Quantifying Uncertainties in Solvation Procedures for Modeling Aqueous Phase Reaction Mechanisms

January 4, 2021
Author(s)
Kathleen Schwarz, Alex Maldonado, Tae Hoon Choi, Frank Eckert, Satoshi Hagiwara, Minoru Otani, Ravishankar Sundararaman, John Keith
Computational quantum chemistry provides fundamental chemical and physical insights into solvated reaction mechanisms across many areas of chemistry, especially in homogeneous and heterogeneous renewable energy catalysis. Such reactions may depend on

Fire Dynamics Simulator: Technical Reference Guide (NISTIR 6467)

January 1, 2000
Author(s)
Kevin B. McGrattan, Howard R. Baum, Ronald G. Rehm, Anthony P. Hamins, Glenn P. Forney
The idea that the dynamics of a fire might be studied numerically dates back to the beginning of the computer age. Indeed, the fundamental conservation equations governing fluid dynamics, heat transfer, and combustion were first written down over a century
Displaying 1776 - 1800 of 2915
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