Journals

A Low Noise Latching Comparator Probe for Waverform Sampling Applications

May 1, 2002

Author(s)

David I. Bergman, Bryan C. Waltrip

A new latching comparator probe is described. The probe is being developed as part of an effort to extend voltage measurement capability in the 10 Hz to 1 MHz...

Multi-Step Magnetic Switching in Single-Crystal (001) Co₂MnGe Films

April 23, 2002

Author(s)

F Y. Yang, C H. Shang, T Ambrose, J J. Krebs, G A. Prinz, Valerian I. Nikitenko, V S. Gornakov, Alexander J. Shapiro, Robert D. Shull, C L. Chien

Multi-step magnetic switching with single, double, and triple loops has been observed in single-crystal (001) Co2MnGe Heusler alloy films epitaxially grown on...

Precessional switching in submicrometer spin valves

April 22, 2002

Author(s)

Shehzaad F. Kaka, Stephen E. Russek

Small spin valves are switched using a subnanosecond field pulse applied alongdg the magnetization hard-axis fields increases as the duration is decreased from...

Tri-Alpha-Napthyl Benzene as a Crystalline or Glassy MALDI Matrix

April 19, 2002

Author(s)

Barry J. Bauer, Charles M. Guttman, Da-Wei Liu, William R. Blair

Tri-alpha-napthyl benzene (TANB) is used as a matrix in matrix-assisted laser desorption/ionization (MALDI) spectroscopy. Electrosprayed TANB is crystalline and...

Application of Electromodulated Fluorescence to the Study of the Dynamics of Single-Strand Oligonucleotides at Modified Gold Surfaces

April 15, 2002

Author(s)

Lili Wang, Vitalii I. Silin, Adolfas K. Gaigalas, J L. Xia, G Gebeychu

Single-strand oligonucleotides with fluorescein labels were immobilized on modified gold electrodes and the surface fluorescence intensity was measured as a...

Polymerase Chain Reaction Amplification of DNA From Aged Blood Stains: Quantitative Evaluation of the Suitability for Purpose of Four Filter Papers as Archival Media

April 15, 2002

Author(s)

Margaret C. Kline, David L. Duewer, Janette W. Redman, John M. Butler, D A. Boyer

In collaboration with the Armed Forces Institute of Pathology's Department of Defense DNA Registry, the National Institute of Standards and Technology recently...

IEEE 802.16 Marks Broadband Wireless Access Maturation

April 15, 2002

Author(s)

Roger Marks

With the completion of the IEEE Standard 802.16 WirelessMAN {trademark} air interface, broadband wireless access (BWA) is reaching maturity as a serious...

Radiocarbon as a Tool to Apportion the Sources of Polycyclic Aromatic Hydrocarbons and Black Carbon in Environmental Samples

April 15, 2002

Author(s)

C. M. Reddy, A. Pearson, L. Xu, A. P. McNichol, Bruce A. Benner Jr., Stephen Wise, George A. Klouda, Lloyd A. Currie, T. I. Eglinton

Thermodynamics of Reactions Catalyzed by PABA Synthase

April 10, 2002

Author(s)

Yadu D. Tewari, P Y. Jensen, N Kishore, M P. Mayhew, J F. Parsons, Edward Eisenstein, Robert N. Goldberg

Microcalorimetry and high performance liquid chromatography (HPLC) have been used to conduct a thermodynamic investigation of reactions catalyzed by PABA...

Size-Monodisperse Metal Nanoparticles Via Hydrogen-Free Spray Pyrolysis

April 3, 2002

Author(s)

Jung Hyeun Kim, Thomas A. Germer, George Mulholland, S H. Ehrman

Pure copper nanoparticles were produced using a co-solvent approach avoiding use of hydrogen or other reducing gas. Compared with the particles formed without...

Use of Integrating Spheres as Ultraviolet Radiation Sources for Artificial Weathering of Polymers

April 1, 2002

Author(s)

Joannie W. Chin, E Byrd, N Embree, Jonathan W. Martin

Laboratory ultraviolet (UV) chambers are widely used to obtain weathering data for a wide range of commercial polymer products including coatings, textiles...

Selective Study of Polymer/Dielectric Interfaces with Vibrationally Resonant Sum Frequency Generation Via Thin-Film Interference

April 1, 2002

Author(s)

P T. Wilson, Kimberly A. Briggman, William E. Wallace, John C. Stephenson, Lee J. Richter

A new technique for selective characterization of the structure of free and buried thin film interfaces by vibrationaly resonant sum frequency generation...

Remineralization Effect of a Low-Concentration Fluoride Rinse in an Intraoral Model

April 1, 2002

Author(s)

Laurence C. Chow, Shozo Takagi, Stanislav Frukhtbeyn, B A. Sieck, Edward E. Parry, N S. Liao, Gary E. Schumacher, Milenko Markovic

A previous study showed that a sodium hexafluorosilicate-calcium chloride-based two-solution fluoride (F) rinse containing 6 mmol/l of F was more effective than...

Summary of Comparison of Realizations of the ITS-90 Over the Range 83.8058 K to 933.473 K: CCT Key Comparison CCT-K3

April 1, 2002

Author(s)

Billy W. Mangum, Gregory F. Strouse, William F. Guthrie, R Pello, M F. Stock, E Renaot, Y Hermier, G Bonnier, P Marcarino, K S. Gam, K H. Kang, Y G. Kim, J V. Nicholas, D. R. White, T D. Dransfield, Y Duan, Y Qu, J Connolly, R L. Rusby, J Gray, G J. Sutton, D I. Head, K D. Hill, A G. Steele, K Nara, Tony J. Tegeler, U Noatsch, D Heyer, B Fellmuth, B Thiele-Krivoj, S Duris, A I. Pokhodun, N P. Moiseeva, A G. Ivanova, P A. de Groot, J F. Dubbeldam

This is a report to the Comite Consultatif de Thermometrie (CCT) on Key Comparison 3, i.e., the comparison of realizations of the ITS-90 over the range 83.8058...

Non-Equilibrium Pattern Formation in the Crystallization of Polymer Blend Films

April 1, 2002

Author(s)

V Ferreiro, Jack F. Douglas, James A. Warren, Alamgir Karim

The crystallization of polymeric and metallic materials normally occurs under conditions far from equilibrium. The morphologies formed reflect a competition...

Biogenic Contributions to Atmospheric Volatile Organic Compounds in Azusa, California

April 1, 2002

Author(s)

George A. Klouda, C. W. Lewis, D C. Stiles, J L. Marolf, W D. Ellenson, W A. Lonneman

An objective of the 1997 Southern California Ozone Study (SCOS97) was to provide an up-to-date assessment of the importance of biogenic emissions for...

A Technique for Deducing In-Plane Modulus and Coefficient of Thermal Expansion of a Supported Thin Film

April 1, 2002

Author(s)

Martin Y. Chiang, C. K. Chiang, Wen-Li Wu

A technique for determining the in-plane modulus and the coefficient of thermal expansion (CTE) of supported thin films has been developed. The modulus and CTE...

Combinatorial Materials Science: What's New Since Edison?

April 1, 2002

Author(s)

Eric J. Amis, X D. Xiang, J C. Zhao

Combinatorial methods, or high throughput experimentations, have captured the attention of the materials industry due to the promise of providing new...

FS-TST: Forensic Software Testing Support Tools Requirements, Design Notes and User Manual

April 1, 2002

Author(s)

James R. Lyle

This document describes FS-TST Release 1.0. A software package developed to aid the testing of disk imaging tools typically used in forensic investigations. The...

High Precision Hy-CI Variational Calculations for the Ground State of Neutral Helium and Helium-Like ions

April 1, 2002

Author(s)

James S. Sims, Stanley A. Hagstrom

Hylleraas-Configuration Interaction (Hy-CI) method variational calculations with up to 4648 expansion terms are reported for the ground 1S state of neutral...

It's Bound to Be Right

April 1, 2002

Author(s)

Isabel M. Beichl, F Sullivan

This is a tutorial article on a Monte Carlo method for eliminating double counting in massive data sets. It has also been used to classify images.

Thermomechanical Effects in Embedded Passive Materials

April 1, 2002

Author(s)

Andrew J. Slifka, Elizabeth S. Drexler

Thermomechanical fatigue was measured using electron-beam moire (EBM) and infrared (IR) microscopy. A specimen was made using FR-4 printed wiring board, (PWB)...

Effect of Temperature, Strain Rate, and Grain Size on the Mechanical Response of Ti₃SiC₂ in Tension

April 1, 2002

Author(s)

M Radovic, M W. Barsoum, T El-Raghy, Sheldon M. Wiederhorn, William E. Luecke

Results of tensile tests at constant cross head displacement rates, relaxation tests and cycling loading-unloading tests indicate that the mechanical response...

Quadrupole Effects in Core and Valance Photoelectron Emission From Crystalline Germanium Measured Via a Spatially Modulated X-Ray Interference Field

April 1, 2002

Author(s)

E J. Nelson, Joseph C. Woicik, P Pianetta, I A. Vartanyants, J W. Cooper

Near an x-ray Bragg reflection, two x-ray beams (incident and reflected) with opposite wavevectors exist within the crystal to create an x-ray standing wave...

Effect of Lateral Cracks Upon Fracture Toughness Determined by the Surface Crack in Flexure Method

April 1, 2002

Author(s)

George D. Quinn, J A. Salem

The surface crack in flexure method uses a Knoop indenter to create small semi elliptical surface pre cracks in beam specimens. Lateral cracks may interfere...

Morphological Developement in Copolymer Blends of Poly (Ethylene-Co-Hexene) and Poly (Ethylene-Co-Butene)

April 1, 2002

Author(s)

K Shimizu, Haonan Wang, Z G. Wang, H D. Kim, Charles C. Han

In order to understand the liquid-liquid phase separation and crystallization in copolymer blends of PEH and PEB, the transmitted optical microscopy was...

Coherent Phase Equilibria in a Bending Film

April 1, 2002

Author(s)

Alexander L. Roytburd, Julia Slutsker

The theory of coherent phase diagrams is expanded to phase transformations in films. Coherent phase transformations in a free standing film or a thin plate are...

Friction Measurements of Ultra-Thin Carbon Overcoats in Air

April 1, 2002

Author(s)

P M. McGuiggan, C S. Bhatia, D Bogy, W Fong, Stephen M. Hsu

The friction force as a function of humidity was measured between 5 nm thick carbon films coated onto mica surfaces. The friction was found to be proportional...

Catalytic Carbon K Edge X-ray Absorption Spectroscopy: Multilayer Mirror Detection System

April 1, 2002

Author(s)

Daniel A. Fischer, S Sambasivan, A Kuperman, Y Platonov, J L. Wood

Fluorescence yield x-ray absorption spectroscopy of the low Z elements C, N, O, and F is a powerful tool for understanding the local structure and chemistry of...

Process Sensitivity of GMAW: Aluminum vs. Steel

April 1, 2002

Author(s)

Timothy P. Quinn

A heat-transfer model of the melting electrode in gas metal are welding (GMAW) was used to compare the relative sensitivity of the process when welding with...