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Displaying 46126 - 46150 of 73929

Energy Dispersive X-ray Analysis using a Microcalorimeter Detector

January 29, 2001
Author(s)
W. Harris, L. Le Tarte, H. Bakhru, W. Gibson, D. Wu, Robert E. Geer, David A. Wollman
Energy dispersive X-ray analysis (EDX) is widely used within the semiconductor community for chemical analysis and identification of features observed in scanning electron microscopy images. While this technique provides valuable information for defect

Abstracts for the MSEL Assessment Panel, March 2001

January 26, 2001
Author(s)
Leslie E. Smith, Alamgir Karim, Leonid A. Bendersky, C Lu, J J. Scott, Ichiro Takeuchi, Kathleen M. Flynn, Vinod K. Tewary, Davor Balzar, G A. Alers, Stephen E. Russek, Charles C. Han, Haonan Wang, William E. Wallace, Daniel A. Fischer, K Efimenko, Wen-Li Wu, Jan Genzer, Joseph C. Woicik, Thomas H. Gnaeupel-Herold, Henry J. Prask, Charles F. Majkrzak, Norman F. Berk, John G. Barker, Charles J. Glinka, Eric K. Lin, Ward L. Johnson, Paul R. Heyliger, David T. Read, R R. Keller, J Blendell, Grady S. White, Lin-Sien H. Lum, Eric J. Cockayne, Igor Levin, C E. Johnson, Maureen E. Williams, Gery R. Stafford, William J. Boettinger, Kil-Won Moon, Daniel Josell, Daniel Wheeler, Thomas P. Moffat, W H. Huber, Lee J. Richter, Clayton S. Yang, Robert D. Shull, R A. Fry, Robert D. McMichael, William F. Egelhoff Jr., Ursula R. Kattner, James A. Warren, Jonathan E. Guyer, Steven P. Mates, Stephen D. Ridder, Frank S. Biancaniello, D Basak, Jon C. Geist, Kalman D. Migler
Abstracts relating to research and development in the NIST Materials Science and Engineering Laboratory (MSEL) are presented for a poster session to be presented to the 2001 MSEL Assessment Panel.

The FLUD format: Logging Usability Data from Web-based Applications

January 24, 2001
Author(s)
John V. Cugini
This paper presents a proposed format for representing the behavior of users as they interact with a Web-based application. The captured log data can be valuable for analyzing and improving the usability of such applications. The background and motivation

Recent Advances in Flame Retardant Polymer Nanocomposites

January 22, 2001
Author(s)
Jeffrey W. Gilman, Takashi Kashiwagi, A B. Morgan, Richard H. Harris Jr., L D. Brassell, W H. Awad, Rick D. Davis, L Chyall, T E. Sutto, Paul C. Trulove, H DeLong
A new approach to address the ever increasing demand for higher performance flame retarded products has recently focused on use of mica-type clays nano-dispersed in commodity polymers. These "nanocomposites" exhibit the unusual combination of reduced

Coercivity in Exchange-Bias Bilayers

January 18, 2001
Author(s)
Mark D. Stiles, Robert D. McMichael
Simulations of magnetic reversal in polycrystalline exchange-bias bilayers exhibit two contributions to the enhanced coercivity found in exchange-bias systems, one due to inhomogeneous reversal and and the other to irreversible transitions in the

Improved Range Resistors for AC-DC Transfer Measurements

January 18, 2001
Author(s)
H. O. Wolcott, Joseph R. Kinard Jr., Thomas E. Lipe Jr.
This paper discusses the factors contributing to the ac-dc differences of high-voltage thermal converters. A novel resistor designed to minimize these contributions is described and measurements illustrating its performance are summarized.

Analytic Continuation, Singular Value Expansions, and Kramers-Kronig Analysis

January 17, 2001
Author(s)
Andrew M. Dienstfrey, L Greengard
We describe a systematic approach to the recovery of a function analytic in the upper half plane, ${\bfC:^+$, from measurements over a finite interval on the real axis, $D\subset {\bfR}$. Analytic continuation problems of this type are well-known to ill

CASSCF Investigation of Electronic Excited States of 2-Aminopurine

January 11, 2001
Author(s)
E L. Rachofsky, J B. Ross, Morris Krauss, R Osman
2-aminopurine is a highly fluorescent analog of adenine that can be incorporated synthetically into DNA with little perturbation of the native double-helical structure. The sensitive dependence of the quantum yield of this fluorophore on nucleic acid

Impediments to Reproducibility in Display Metrology

January 11, 2001
Author(s)
Edward F. Kelley
Most people are surprised to learn of the complexities of measuring the performance of electronic displays. Serious errors are encountered in even seemingly simple measurements if we blithely measure displays without being aware of the pitfalls. We discuss

Measurement and Evaluation of Embodied Conversational Agents

January 10, 2001
Author(s)
Gregory A. Sanders, Jean C. Scholtz
A formative evaluation for the DARPA Communicator project is used as an extended example ofevaluating a non-embodied conversational system, in order to provide context and illustrate howevaluating embodied agents requires extensions to existing techniques

Long-Term Charge Offset Noise in Coulomb-Blockade Devices

January 9, 2001
Author(s)
William Huber, S Martin, Neil M. Zimmerman
While Coulomb-Blockade devices have shown promise as qubit systems or qubit state detectors, large scale parallelization of these devices is severely hampered due to the low-frequency charge offset (Q 0) drift in time. We note that an extrapolation of the

Transverse Stress and Fatigue Effects in Y-Ba-Cu-O Coated IBAD Tapes

January 8, 2001
Author(s)
John (Jack) W. Ekin, S L. Bray, Najib Cheggour, Cameron C. Clickner, S R. Folytn, P N. Arendt, A A. Polyanskii, David C. Larbalestier, C. N. McCowan
Measurements of the effects of static and cyclic (fatigue) transverse stress on the critical current of Ya-Ba-Cu-O-coated tapes made by ion-beam-assisted deposition (IBAD) are reported at 76 K in self magnetic field. Ya-Ba-Cu-O films (15m thick) on Inconel

Toxic Yield

January 7, 2001
Author(s)
William M. Pitts
It is generally recognized that the vast majority of deaths associated with accidental enclosure fires are due to smoke inhalation. Older reviews of autopsy results suggested that the fraction was on the order of 2/3. In the United States there is evidence

Blackman Diagrams and Elastic-Constant Systematics

January 5, 2001
Author(s)
H M. Ledbetter
We consider Blackman diagrams for various cubic materials. These diagrams, plots of reduced elastic-stiffness coefficients C 12/C 11 versus C 44/C 11, show that materials with similar chemical bonding tend to fall in the same region of the diagrams. Such

Bulk-Moduli Systematics in Oxides Including Superconductors

January 5, 2001
Author(s)
H M. Ledbetter, Sudook A. Kim
For oxides, including superconductors, we consider the systematics of the bulk-modulus/atomic-volume (B/V a) relationship. For nonsuperconducting oxides, the B-V a diagram shows that most oxides fall in three sets: (1) rocksalt crystal structure, AO; (2)

Elastic Constants of Porous Ceramics

January 5, 2001
Author(s)
H M. Ledbetter, M Lei, S K. Datta
Using theoretical models, we consider the elastic constants of ceramics containing proes. As an example, we consider alumina. However, the approach applies to all ceramics. As a point of departure, we consider spherical pores. For all the usual elastic

Elastic Gr neisen Parameters of Cubic Elements and Compounds

January 5, 2001
Author(s)
H M. Ledbetter, Sudook A. Kim
From a material's second-order elastic-stiffness coefficients C ijkl and its third-order elastic-stiffness coefficients C ijklmn, we calculated the scalar dimensionless Gr neisen parameter γ, the single most important property of an anharmonic solid. We
Displaying 46126 - 46150 of 73929
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