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Displaying 36751 - 36775 of 73929

Magnetic normal modes of nano-elements

May 15, 2005
Author(s)
Robert McMichael, Mark D. Stiles
Micromagnetic calculations are used to determine the eigenfrequencies and precession patterns of some of the lowest-frequency magnetic normal modes of submicron patterned elements. For a Permalloy-like ellipse, 350 nm ¿ 160 nm ¿ 5 nm thick in zero field

A Flexible Bandpass Correction Method for Spectrometers

May 13, 2005
Author(s)
Yoshihiro Ohno
An improved method for the correction of bandpass errors in spectrometers has been developed. This method is an improvement over the Stearns and Stearns method, which is limited in use to a triangular bandpass function and requires the bandwidth be matched

Implementation of the semiclassical quantum Fourier transform in a scalable system

May 13, 2005
Author(s)
J Chiaverini, Joseph W. Britton, Dietrich G. Leibfried, Emanuel H. Knill, Murray D. Barrett, Brad R. Blakestad, Wayne M. Itano, John D. Jost, C. Langer, R Ozeri, Tobias Schaetz, David J. Wineland
One of the most interesting future applications of quantum computers is Shor's factoring algorithm, which provides an exponential speedup compared to known classical algorithms. The crucial final step in Shor's algorithm is the quantum Fourier transform

NIST Facility for Color Rendering Simulation

May 13, 2005
Author(s)
Wendy L. Davis, J L. Gardner, Yoshihiro Ohno
The color rendering index (CRI) does not adequately assess the color rendering properties of solid-state light sources. An improved metric will be critical to the development of such new light sources for general lighting applications. A facility for color

A Behavioral Model for Reducing the Complexity of Mixer Analysis and Design

May 11, 2005
Author(s)
Alessandro Cidronali, Giovanni Loglio, Jeffrey Jargon, Gianfranco Manes
This paper considers an approach for the behavioral modeling of the conversion mechanism in a nonlinear device suitable for the analysis of RF/microwave mixers. The core of the model consists of the conversion matrix of the nonlinear cell under

A Color Gamut Assessment Standard: An Inter-Laboratory Measurement Comparison

May 11, 2005
Author(s)
Paul A. Boynton, Libert M. John, Edward F. Kelley
In earlier papers, NIST proposed a standard illumination source and optical filter targets to with which to assess the state-of-the-art of display measurement. The Gamut Assessment Standard (GAS) was present the display metrologist with a set of

Challenges in Automotive Display Standards

May 11, 2005
Author(s)
Edward F. Kelley, Silviu Pala
We review the goals, accomplishments, and directions of the Society for Automotive Engineers (SAE) J1757 Vehicular Flat Panel Display Metrology Committee. The conditions for which a display must qualify for use in an automobile are much different than for

Display Metrology Concerns International Standards

May 11, 2005
Author(s)
Paul A. Boynton
An alphabet soup of display standards addresses the various needs and applications of display manufactures, integrators, and users. Unfortunately, when it comes to display metrology, many of these standards suffer. Assumptions are made about the

High-power nonlinearity of optical fiber power meters at 1474 nm

May 11, 2005
Author(s)
Igor Vayshenker, Ralph Swafford, Shao Yang
We have developed a system to measure the nonlinearity of optical fiber power meters (OFPMs) at a maximum power of 0.6 W at 1474 nm. The system is based on the triplet superposition method. This system measures nonlinearity of OFPMs using correction

Nonlinearity of Response of Silicon Photodiodes at 193 nm

May 11, 2005
Author(s)
Shao Yang, Darryl A. Keenan, Marla L. Dowell
We have developed a measurement system based on a correlation method to characterize the nonlinearity response of silicon photodiodes to pulsed-laser radiation at 193 nm. The method compares the pulse response of the device under test with that of a

On the Ignition of Fuel Beds by Firebrands.

May 11, 2005
Author(s)
Samuel L. Manzello, Thomas G. Cleary, John R. Shields, Jiann C. Yang
An experimental apparatus has been built to investigate the ignition of fuel beds as a result of impact with burning firebrands. The apparatus allowed for the ignition and deposition of both single and multiple firebrands onto the target fuel bed. The

Characterization of Structural Quality of Bonded Silicon-On-Insulator Wafers by Spectroscopic Ellipsometry and Raman Spectroscopy

May 9, 2005
Author(s)
Nhan Van Nguyen, James E. Maslar, Junghyeun Kim, Jin-Ping Han, Jin-Won Park, Deane Chandler-Horowitz, Eric M. Vogel
The crystalline quality of bonded Silicon-On-Insulator (SOI) wafers were examined by spectroscopic ellipsometry and Raman spectroscopy. Both techniques detect slight structural defects in the SOI layer. If a pure crystalline silicon dielectric function is

NIST Reference Colorimeter

May 9, 2005
Author(s)
Maria E. Nadal, Robert R. Bousquet, Gael Obein
The Optical Technology Division at the National Institute of Standards and Technology (NIST) developed a reference instrument for measuring the surface color of non-fluorescent samples at the standard measuring geometries of 0 /45 , ~0 /d, and 8 /d with

Observation of Feshbach Resonances in an Ultracold Gas of 52 Cr

May 9, 2005
Author(s)
J Werner, A Griesmaier, S Hensler, J Stuhler, Tilman Pfau, Andrea Simoni, Eite Tiesinga
We have observed Feshbach resonances in elastic collisions between ultracold 52Cr atoms. This is the first observation of collisional Feshbach resonances in an atomic species with more than one valence electron. The zero nuclear spin of 52Cr and thus the
Displaying 36751 - 36775 of 73929
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