Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Journals

Effects of Bending in Brass Rockwell B Scale Test Blocks

June 2, 2003

Author(s)

Samuel R. Low III, J L. Fink

As part of a project to produce primary hardness reference blocks for the Rockwell B hardness scale at the National Institute of Standards and Technology (NIST)...

Detector-Based Sphere Photometry for Industry

June 2, 2003

Author(s)

Yoshihiro Ohno, R S. Bergman

The Absolute Integrating Sphere Method is now used at NIST for the detector-based calibration of total luminous flux of lamps, as well as for the realization of...

Thermal and Flammability Properties of a Silica-PMMA Nanocomposite

June 1, 2003

Author(s)

Takashi Kashiwagi, A B. Morgan, Joseph M. Antonucci, Mark R. VanLandingham, Richard H. Harris Jr., W H. Awad, John R. Shields

PMMA, poly(metheylmethacrylate), nanocomposites were made by in situ radical polymerization of MMA, methylmethacrylate, with colloidal silica (ca. 12 nm) to...

An Apparatus for Electrophoretic Capture and Recovery of Circular DNA in Thin Layers

June 1, 2003

Author(s)

Kenneth D. Cole

An apparatus was designed for the electrophoretic capture and recovery of circular DNA in thin layers (membranes). Rapid separations were done by the use of a...

Cold Neutron Depth Profiling of Lithium-ion Battery Materials

June 1, 2003

Author(s)

George P. Lamaze, Huaiyu H. Chen-Mayer, D. A. Becker, F Vereda, R. B. Goldner, T Haas, P Zerigian

Development of Standard Reference Materials for Botanical Supplements

June 1, 2003

Author(s)

Katherine E. Sharpless, Lane C. Sander, Stephen A. Wise, A. NguyenPho

Isotopic Metrology of Carbon Dioxide. II. Effects of Ion Source Materials, Conductance Emission, and Accelerating Voltage on Dual-Inlet Cross Contamination

June 1, 2003

Author(s)

R M. Verkouteren, S Assonov, D Klinedinst, W Brand

We report high-precision isotope carbon dioxide measurements, made before and after ion source modification to gas isotope ratio mass spectrometry (IRMS)...

Isotopic Metrology of Carbon Dioxide. I. Interlaboratory Comparison and Empirical Modeling of Inlet Equilibration Time, Inlet Pressure, and Ion Source Conductance

June 1, 2003

Author(s)

R M. Verkouteren, C E. Allison, S A. Studley, K J. Leckrone

We report a pilot study of high-precision differential isotopic ratio measurements made on replicate samples of pure carbon dioxide using three instruments of...

Nonparametric and Semiparametric Models in Comparison of Observations of a Particle-Size Distribution

June 1, 2003

Author(s)

Walter S. Liggett Jr

Testing hypotheses about pairs of unnormalized histograms motivates this paper. The histograms contain particle counts for particle-size intervals. The analysis...

Uncertainty Calculation for the Ratio of Dependent Measurements

June 1, 2003

Author(s)

C M. Wang, H K. Lyer, J Hannig

In this paper we consider the problem of computing an uncertainty interval a ratio with a prescribed confidence level. Although an exact confidence interval...

Revised Thermodynamic Description for the Co-Mo System

June 1, 2003

Author(s)

Albert Davydov, Ursula R. Kattner

The previously assessed Co-Mo system (1999Dav) has been partially revised: thermodynamic descriptions for the liquid, , ς and bcc phases were amended in the...

Electron Backscattered Diffraction and Energy Dispersive X-ray Spectroscopy Study of the Phase NiSn4

June 1, 2003

Author(s)

William J. Boettinger, Mark D. Vaudin, Maureen E. Williams, Leonid A. Bendersky, W R. Wagner

Electron backscattered diffraction and energy dispersive X-ray spectroscopy has been performed on a plate-shaped phase formed through the reaction of Sn and Ni...

Fracture Toughness of Toughened Silicon Nitride by ASTM C 1421

June 1, 2003

Author(s)

George D. Quinn, J Swab, M J. Motyka

The fracture toughness of a commercial sintered reaction-bonded silicon nitride was measured by the three complementary test methods in ASTM C 1421. Precracks...

Stray-Light Correction of the Marine Optical Buoy

June 1, 2003

Author(s)

Steven W. Brown, Bettye C. Johnson, S Flora, M Feinholz, M Yarbrough, R Barnes, Y S. Kim, Keith R. Lykke, D K. Clark

In ocean-color remote sensing, approximately 90% of the flux at the sensor originates from atmospheric scattering, with the water-leaving radiance contribution...

Tomography in the Multiple Scattering Regime of the Scanning Transmission Electron Microscope

June 1, 2003

Author(s)

Zachary H. Levine

To date, nearly all tomography based on electron microscopy has been performed on samples 1 m or less thick. It has also relied on Beer s Law. In this work...

A System for Generating Process and Material Selection Advice During Embodiment Design of Mechanical Components

June 1, 2003

Author(s)

Satyandra K. Gupta, Y Chen, Shaw C. Feng, Ram D. Sriram

This paper describes (1) a systematic approach to material and process selection during embodiment design of mechanical components, (2) algorithms for...

Using Self-Assembled Monolayer Technology to Probe the Mechanical Response of the Fiber Interphase-Matrix Interphase Interface

June 1, 2003

Author(s)

Gale A. Holmes, E Feresenbet, D T. Raghavan

In this paper, a brief review of the fiber-matrix interphase/interface region is given for carbon- and glass-fiber composites. The interphase/interface region...

T_c Suppression in Superconducting Films for use in Transition Edge Sensors

June 1, 2003

Author(s)

Steven Deiker, Gene C. Hilton, Kent D. Irwin, William Rippard, Steve Ruggiero, Leila R. Vale, B. A. Young

Transition edge sensor (TES) microcalorimeters have proved their value as photon detectors in several wavelength regimes. The central elecement of a TES is a...

Surface Micromachining for Transition-Edge Detectors

June 1, 2003

Author(s)

Gene C. Hilton, James A. Beall, Steven Deiker, Joern Beyer, Leila R. Vale, Joel Ullom, Kent D. Irwin

We are developing arrays of high performance detectors based on superconducting transition-edge sensors (TES) for application in x-ray materials analysis as...

A frequency-domain read-out technique suitable for large microcalorimeter arrays demonstrated using high-resolution cryogenic gamma-ray sensors

June 1, 2003

Author(s)

Joel Ullom, M. Cunningham, T. Miyazaki, S. E. Lebov

Cryogenic sensors composed of transition-biased superconducting films have demonstrated remarkable sensitivity at gamma-ray, x-ray, optical, and submillimeter...

Electronics for Arrays of Transition Edge Sensors using Digital Signal Processing

June 1, 2003

Author(s)

Sae Woo Nam, Joern Beyer, Gene C. Hilton, Kent D. Irwin, Carl D. Reintsema, John M. Martinis

Single-pixel transition-edge sensors (TES) are useful for a variety of applications requiring the detection of photons from sub-millimeter wavelengths to gamma...

Performance of 32-channel Time-Division SQUID Multiplexer for Cryogenic Detector Arrays

June 1, 2003

Author(s)

Joern Beyer, Piet DeKorte, Carl D. Reintsema, Sae Woo Nam, Gene C. Hilton, Leila R. Vale, Kent D. Irwin

Multiplexed readout is a practical requirement for the successful deployment of large-scale cryogenic detector arrays in applications ranging from x-ray...

Description of the Nonlinear Behavior of Superconductors Using a Complex Conductivity

June 1, 2003

Author(s)

James Booth, Susan A. Schima, Donald C. DeGroot

The origin of the detrimental nonlinear response in the high Tc superconductor (HTS) microwave devices is currently not well understood. In order to help...

A Self-Attenuating Superconducting Transmission Line for Use as a Microwave Power Limiter

June 1, 2003

Author(s)

James Booth, David A. Rudman, Ronald H. Ono

We have designed, fabricated, and tested a microwave power limiter based on high temperature superconductor thin film technology. The signal limiter takes the...

Influence of Impedance Mismatch Effects on Measurements of Unloaded Q Factors of Transmission Mode Dielectric Resonators

June 1, 2003

Author(s)

Kenneth Leong, James Booth, Sang Y. Lee

Precise measurements of the surface resistance of high temperature superconducting thin films using transmission mode dielectric resonators requires accurate...

Banishing Quasiparticles From Josephson-Junction Qubits: Why and How To Do It

June 1, 2003

Author(s)

Kristine Lang, Sae Woo Nam, Joe Aumentado, John M. Martinis, C Urbina

Current-biased Josephson junctions are prime candidates for the implementation of quantum bits; however, a present limitation is their coherence time. In this...

Microwave Surface Impedance and Nonlinear Properties of MgB₂ Films

June 1, 2003

Author(s)

James Booth, Sang Y. Lee, Kenneth Leong, J. H. Lee, J. Lim, H. N. Lee, S. H. Moon, B. Oh

We have measured the temperature dependence of the microwave surface impedance and the nonlinear response of high-quality MgB 2 films on c-cut sapphire at...

Stacked SNS Josephson Junction Arrays for Quantum Voltage Standards

June 1, 2003

Author(s)

Paul Dresselhaus, Yonuk Chong, J. Plantenberg, Samuel Benz

NIST is using and developing superconductor-normal metal-superconductor (SNS) Josephson arrays for both programmable DC and AC voltage standards. Increasing the...

Critical Current Control and Microwave-Induced Characteristics of (NbN/TiN_x)_n/NbN Stacked Junction Arrays

June 1, 2003

Author(s)

Mayumi Ishizaki, Hirotake Yamamori, A. Shoji, Samuel Benz, Paul Dresselhaus

Stacked double and triple Josephson junctions with NbN electrodes and TiN x barriers were fabricated for the next generation 10 V programmable Josephson voltage...

Operation of a NbN-Based Programmable Josephson Voltage Standard Chip with a Compact Refrigeration System

June 1, 2003

Author(s)

A. Shoji, Hirotake Yamamori, Mayumi Ishizaki, Samuel Benz, Paul Dresselhaus

A refrigeration system was designed and constructed for realizing a liquid-He-free programmable Josephson voltage standard. The system is equipped with a two...

Was this page helpful?