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Displaying 39151 - 39175 of 73830

Packet Filtering for Aggregate-based Congestion Control

March 24, 2004

Author(s)

Nicolas Chevrollier, R E. Van Dyck

Simulation of Expansion in Cement Based Materials Subjected to External Sulfate Attack

March 24, 2004

Author(s)

B Mobasher, Chiara C. Ferraris

Sulfate attack in concrete structures is considered to be among the major durability concerns in civil infrastructure systems. Proper modeling techniques can help us understand the durability conditions more readily and accurately. Such an understanding

Building Regulatory Systems in a Post-September 11 World

March 22, 2004

Author(s)

Richard W. Bukowski

The September 11, 2001 attacks in the United States have initiated a significant discussion and rethinking among building regulators not only in the U.S., but also around the world. While most quickly state that regulations should not require that

Tunneling Characteristics and Low Frequency Noise of High-Tc Superconductor/Noble-Metal Junctions

March 22, 2004

Author(s)

Yizi Xu, John (Jack) W. Ekin

We report extensive measurements of transport characteristics and low-frequency resistance noise of c-axis YBCO/Au junctions. The dominant conduction mechanism is tunneling at low temperatures. The conductance characteristic is asymmetric, and the

Tunneling characteristics and low-frequency noise of high-T c superconductor/noble-metal junctions

March 22, 2004

Author(s)

Yizi Xu, John (Jack) W. Ekin

We report extensive measurements of transport characteristics and low-frequency resistance noise of c-axis yttrium-barium-copper-oxide (YBCO)/Au junctions. The dominant conduction mechanism is tunneling at low temperatures. The conductance characteristic

NIST HANDBOOK 150-2A National Voluntary Laboratory Accreditation Program Calibration Laboratories Technical Guide for Electromagnetic DC Low Frequency Measurements

March 21, 2004

Author(s)

C D. Faison, Carroll S. Brickenkamp

The Calibration Laboratories Accreditation Program was developed by the National Voluntary Laboratory Accreditation Program (NVLAP) at the National Institute of Standards and Technology (NIST) as a result of interest from private industry and at the

NIST HANDBOOK 150-2G National Voluntary Laboratory Accreditation Program Calibration Laboratories Technical Guide for Mechanical Measurements

March 21, 2004

Author(s)

C D. Faison, Carroll S. Brickenkamp

On Competition between Greedy Autonomous Systems in Providing Internet Services: Emergent Behaviour and Stability

March 19, 2004

Author(s)

Vladimir V. Marbukh, R E. Van Dyck

Optical frequency synthesis and comparison at the 10 -19 level

March 19, 2004

Author(s)

L-S B. Ma, A Bartels, Lennart Robertsson, Massimo Zucco, R S. Windeler, G Wilpers, Christopher W. Oates, Leo W. Hollberg, Scott Diddams

Phase Evolution of Ba 2 YCu 3 O 6+x Films During the BaF 2 Process

March 18, 2004

Author(s)

Winnie K. Wong-Ng, Igor Levin, Ron Feenstra, Lawrence P. Cook, Mark D. Vaudin

Reliability Implications of Scaling Gate Oxides in Deep Submicron CMOS Technologies

March 18, 2004

Author(s)

John S. Suehle

Decreasing the thickness of the gate insulator in advanced CMOS devices seriously shrinks their reliability margin. Fortunately, dielectric breakdown becomes softer for thinner dielectrics and it has been shown in recent studies that the breakdown event

Pumice Aggregates for Internal Water Curing

March 17, 2004

Author(s)

Pietro Lura, Dale P. Bentz, D Lange, K Kovler, A Bentur

A novel concept in internal curing of High Performance Concrete is based on dispersing very small, saturated lightweight aggregates (LWA) in the concrete, containing sufficient water to counteract self-desiccation. The amount of water in the LWA can be

Towards Flexible Service Level Agreements

March 17, 2004

Author(s)

Vladimir V. Marbukh

Towards Market Approach to Providing Survivable Services

March 17, 2004

Author(s)

Vladimir V. Marbukh

Y-SNP Typing of Two U.S. Populations Using Allele-Specific Hybridization and Primer Extension

March 17, 2004

Author(s)

Peter Vallone, John Butler

Multiplex analysis of genetic markers has become increasingly important in a number of fields including DNA diagnostics and human identity testing. Two methods for examination of single nucleotide polymorphisms (SNPs) with a potential for a high degree of

Key metrology considerations for fiber Bragg grating sensors

March 14, 2004

Author(s)

Shellee D. Dyer, Paul A. Williams, Robert J. Espejo, Jonathan D. Kofler, Shelley M. Etzel

We discuss the current status of fiber Bragg grating (FBG) sensor metrology. High-accuracy wavelength measurements are critical for FBG strain sensors, because wavelength measurement uncertainties even as small as 1 pm lead to an uncertainty of nearly 1

The First Measurements with Octave-Spanning Femtosecond Laser Frequency Combs

March 13, 2004

Author(s)

Scott A. Diddams, David J. Jones

Here we describe in a historical manner the first optical frequency measurement measurements with octave-spanning frequency combs and the first measurement and stabilization of the carrier-envelope offset frequency for a train of femtosecond laser pulses.

Fluid Properties Simulation Challenge Recommendations for Problem II (b): Cyclohexane Density

March 11, 2004

Author(s)

Eric W. Lemmon

Recommendations are given for Problem 11(b): cyclohexane density at problem conditions: (1) 0.1 MPa, 300 K and (2) 20.0 NAPA, 400 K. The recommended values and their uncertainties are: 772.13 0.3 kg m-3 and 702.9 1.4 kg m-3.

Lithographically patterned magnetic calorimeter x-ray detectors with integrated SQUID readout

March 11, 2004

Author(s)

Barry L. Zink, Kent D. Irwin, Gene C. Hilton, David P. Pappas, Joel Ullom, Martin Huber

We describe the design, fabrication and performance of a fully lithographically patterned magnetic microcalorimeter X-ray detector. The detector is fabricated on the same chip as a low-noise SQUID which measures the change in the magnetic sensor film's

Low temperature optical photon detectors for quantum information applications

March 11, 2004

Author(s)

Sae Woo Nam, Aaron J. Miller, Danna Rosenberg

There is increasing interest in using high-performance cryogenic optical photon detectors in a variety of applications in quantum information science and technology. These applications require detectors that have extremely low dark count rates, high count

Nano-Lithography in Ultra-High Vacuum (UHV) for Real World Applications

March 11, 2004

Author(s)

James D. Gilsinn, Hui Zhou, Bradley N. Damazo, Joseph Fu, Richard M. Silver

As nano-lithography technology improves, more companies and research groups have the capability to create nano-scale structures. Scanning tunneling microscopes (STMs) are commonly used to create these structures and evaluate them afterward. One difficulty

Robust infrared filters for x-ray spectroscopy

March 11, 2004

Author(s)

Nathan A. Tomlin, Joel Ullom, James A. Beall, Gene C. Hilton, Steven Deiker, W.Bertrand (Randy) Doriese, Kent D. Irwin, Carl D. Reintsema, Leila R. Vale, Yizi Xu

One challenge to using cryogenic detectors for x-ray spectroscopy on a scanning electron microscope is the implementation of infrared blocking filters. In order to achieve high x-ray transmission, these filters can be as thin as 250 nm and consequently are

Structural, Electronic and Optical Properties of B-(Fe 1-x Co 2 )Si 2

March 11, 2004

Author(s)

D B. Migas, Leo Miglio, M Rebien, W Henrion, P Stauss, Anthony G. Birdwell, Albert Davydov, V L. Shaposhnikov, V E. Borisenko

Optimized crystal structure, electronic bands and density of states nearby the band gap, and the dielectric function of -(Fe1-xCox)Si2 with x equal to 0.0625 and 0.125 were obtained by means of total energy ultrasoft pseudopotential and full-potential

A Cross-Correlation Based Method for Spatial-Temporal Traffic Analysis

March 10, 2004

Author(s)

Kevin L. Mills, J Yuan

Analyzing spatial-temporal characteristics of traffic in large-scale networks requires both suitable analysis method and a means to reduce the amount of data that must be collected. Of particular interest would be techniques that reduce the amount of data

Enhanced Model for Scanning Tunneling Microscope Tip Geometry Measured with Field Ion Microscopy

March 10, 2004

Author(s)

P V. Rao, Carsten P. Jensen, Richard M. Silver

Estimating the shape and size of a scanning tunneling microscope (STM) tip before scanning is often necessary for the correct interpretation of the STM data. This is particularly essential when using the STM as a metrology tool. It is common among

Advanced communications
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