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Displaying 326 - 350 of 2521

A 350-GHz high-resolution high-sensitivity passive video imaging system

April 27, 2010
Author(s)
Daniel T. Becker, James A. Beall, Hsiao-Mei Cho, William Duncan, Kent D. Irwin, Gene C. Hilton, Robert D. Horansky, Peter J. Lowell, Michael D. Niemack, Nicholas G. Paulter Jr., Carl D. Reintsema, Francis J. Schima, Robert E. Schwall, Ki W. Yoon, Peter Ade, Carole Tucker, Simon Dicker, Mark Halpern
… a resolution of approximately 1 cm at video frame rates (20 frames per second). High spatial resolution is achieved by … (NETD) of 70 mK for the fully sampled 1 m × 1 m image at 20 frames per second. …

Hard X-Ray Spectrometers for the National Ignition Facility

June 1, 2001
Author(s)
J Seely, C Back, R Deslattes, Lawrence T. Hudson, G Holland, P Bell, M Miller
… and will be fabricated to record x-ray spectra in the 1.1-20.1 keV energy range. The High-Energy Electronic X-Ray … 1.1 to 10.9 keV and one transmission crystal covering 8.6-20.1 keV. The spectral resolving power varies from approximately 2000 at low energies to 300 at 20 keV. The spectrum produced by each crystal is recorded by …

Intrinsic Damping and Intentional Ferromagnetic Resonance Broadening in Thin Permalloy Films

May 1, 2003
Author(s)
D J. Twisselmann, Robert D. McMichael
… resonance measurements on the thin Ni{ 80 }Fe{ 20 } films are described that determine characteristics of … was investigated by deposited the Ni{ 80 }Fe{ 20 } films on specially prepared substrates, one with … than with magnetization normal. In the NiO/Ni{ 80 }Fe{ 20 } film the in-plane line width is linear in frequency with …

Soot Inception in a Well Stirred Reactor

March 19, 2003
Author(s)
L G. Blevins, K A. Jensen, R A. Ristau, N Y. Yang, C W. Frayne, R C. Striebich, M J. DeWitt, S D. Stouffer, E J. Lee, Robert A. Fletcher, J M. Oran, Joseph M. Conny, George W. Mulholland
Soot samples collected from a well stirred reactor operating with ethylene/air equivalence ratios of 1.9, 2.0, and 2.1 were examined to determine yield, size distribution, morphology, and composition. For F = 1.9, particles are absent. For F = 2.0 and 2.1

Simulations of Optical Microscope Images

July 3, 2006
Author(s)
Thomas A. Germer, Egon Marx
The resolution of an optical microscope is limited by the optical wavelengths used. However, there is no fundamental limit to the sensitivity of a microscope to small differences in any of a feature's dimensions. That is, those limits are determined by

Technology for the Information Commons in a Special Library

March 1, 2005
Author(s)
Nancy Allmang, Rosa Liu
Recently, Information Commons has become a buzzword with two meanings--a gathering place for collaborating and sharing new technologies, or a virtual spot for disseminating intellectual information. This case study highlights technologies utilized by a

Compact Force Sensors for Low-Force Mechanical Probe Calibration

September 1, 2002
Author(s)
Jon R. Pratt, Douglas T. Smith, S Woody
The loading mechanisms of instrumented indentation machines are often calibrated using deadweights. In many cases, due to the geometry of the loading frame, the applied deadweight is tensile, while the indentation leads to be measured are compressive. In

An Empirical Approach to Determining Rockwell Hardness Measurement Uncertainty

July 1, 2002
Author(s)
Samuel R. Low III, Walter S. Liggett Jr
Characteristics of the empirically developed Rockwell hardness test make it difficult to determine measurement uncertainty using methods traditionally applied to other metrological measurements. An empirical approach to determining Rockwell hardness

Techniques to Improve Bluetooth Performance in Interference Environments

October 1, 2001
Author(s)
Nada T. Golmie, Nicolas Chevrollier
Bluetooth is a radio technology for Wireless Personal Area Networks operating in the 2.4 GHz ISM band. Since both Bluetooth and IEEE 802.11 devices use the same frequency band and may likely come together in a laptop or may be close together at a desktop

New Low-Index Liquid Refractive Index Standard: SRM 1922

June 1, 2000
Author(s)
Jennifer R. Verkouteren, Stefan D. Leigh
… is a mineral oil with a refractive index n D =1.46945 at 20 C, which is within the range of the Brix scale (% … or minus}2-3x10 -5 refractive index unit uncertainty at 20 C. The values of n D and dn D /dT were determined by fits … minus}6x10 -5 refractive index unit uncertainty in n D at 20 C. …

Striking Anharmonic Resonances in N 2 O 4 : Supersonic Jet Fourier Transform Spectra at (13.3, 7.9, 5.7, and 3.2) Mu m

February 1, 2000
Author(s)
M Hepp, R Georges, Martin Herman, J.- M. Flaud, Walter J. Lafferty
… The spectrum of N 2 O 4 has been obtained in the (3.2, 5.7, 7.9, and 13.3) m regions, using a supersonic slit jet … are seen. Their band centers are υo(υ 12 ) = 747.85495(20) cm -1 and υ o (υ 6 + υ 10 ) = 755.37492(20) cm -1 . The 7.9 m region also contains two a-type bands …
Displaying 326 - 350 of 2521
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