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Conferences

Microstructure Characterization of Thermal Barrier Coating Deposits Practical Models from Measuremen

September 1, 2005

Author(s)

J Ilavsky, Andrew J. Allen, T A. Dobbins, A Kulkarni, H Herman

A Novel Test Method for Measuring Mechanical Properties at the Small-Scale: The Theta Specimen

September 1, 2005

Author(s)

George D. Quinn, Edwin R. Fuller, Dan Xiang, Ajitkumar Jillavenkatesa, L -. Ma, D B. Smith

Design and Reliability of Ceramics: Do Modelers, Designers, and Fractographers see the same world?

September 1, 2005

Author(s)

George D. Quinn

Applications of Programmable Josephson Voltage Standard in Voltage Metrology

September 1, 2005

Author(s)

Yi-hua Tang

A new type of Josephson junction array using current biased voltage steps can provide highly stable and accurate voltages. The superior voltage stability of...

Approach to Modeling Flame Spread Over Polyurethane Foam-Covered Walls. (POSTER ABSTRACTS)

September 1, 2005

Author(s)

Daniel M. Madrzykowski, Stephen Kerber, Nelson P. Bryner, William L. Grosshandler

Computer simulation has been demonstrated to be credible, when properly applied, as a tool to help fill in critical details of a fire incident and to...

Investigating the Environmental Stability of Ballistic Fibers Using Model Compounds and Mass Spectrometry

September 1, 2005

Author(s)

Kathleen M. Flynn, William E. Wallace, Charles M. Guttman, Gale A. Holmes, Mark Arnould

Metrologies and predictive models to test and predict the long-term reliability of polymers used in ballistic resistant armor are presented.

Electrical Methods for Mechanical Characterization of Interconnect Thin Films

September 1, 2005

Author(s)

Robert Keller, Cynthia A. Volkert, Roy H. Geiss, Andrew Slifka, David T. Read, Nicholas Barbosa, Reiner Monig

We describe the use of electrical methods for evaluating mechanical reliability and properties of patterned copper and aluminum interconnects on silicon...

Analysis of EIED Backoff Algorithm for the 802.11 DCF

September 1, 2005

Author(s)

N-O Song, B-J Kwak, Leonard E. Miller

We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the...

Enhanced Schemes for L2 Handover in IEEE 802.11 Networks and their Evaluations

September 1, 2005

Author(s)

Nicolas Montavont, Nicolas Montavont, T Noel

Given the relatively limited coverage area of 802.11 access points, stations moving inside WLAN are often required to perform a handover. The time needed for a...

A Modular System Architecture for Agile Assembly of Nano-Components using Optical Tweezers

September 1, 2005

Author(s)

Arvind Balijepalli, Thomas W. LeBrun, et al

Knowledge Integration for Bio-Threat Response

September 1, 2005

Author(s)

K Verspoor, O Bodenreider, P Karp, H Kelly, S Loranger, M Musen, Ram D. Sriram, C Wroe, C Joslyn, J Ambrosiano

Bio-threats require rapid analysis and response to prevent widespread consequences to the population. The inability to easily link and exploit biological...

A Semantic Web Service and Simulation Framework to Intelligent Distributed Manufacturing

September 1, 2005

Author(s)

Y J. Son, Boonserm Kulvatunyou, Hyunbo Cho, Shaw C. Feng

To cope with today?s fluctuating markets, a virtual enterprise (VE) concept can be employed to achieve the cooperation among independently operating enterprises...

Integrated Simulation and Gaming Architecture for Incident Management Training

September 1, 2005

Author(s)

Sanjay Jain, Charles R. McLean

The simulation-based training systems that are available or under development today for incident management are typically focused on macro level sequence of...

A Tool Kit for Implementing XML Schema Naming and Design Rules

September 1, 2005

Author(s)

Joshua Lubell, Boonserm Kulvatunyou

A tool kit being developed at the National Institute of Standards and Technology (NIST)encodes XML schema Naming and Design Rules in a computer-interpretable...

Generating Cell Arrays Inside Microfluidic Networks

September 1, 2005

Author(s)

Samuel Forry, Darwin Reyes-Hernandez, Michael Gaitan, Laurie E. Locascio

Impedance Control for Critically Coupled Cavities

August 31, 2005

Author(s)

Billy F. Riddle, Craig Nelson

Cavity resonators are often used in low phase noise oscillators that utilize carrier suppression. These oscillators are employed in systems that measure phase...

Noise Properties of Microwave Signals Synthesized with Femtosecond Lasers

August 29, 2005

Author(s)

Eugene N. Ivanov, John J. McFerran, Scott A. Diddams, Leo W. Hollberg

We discuss various aspects of high resolution phase noise measurements at microwave frequencies. This includes methods to achieve thermal noise limited...

Characterizing the Performance of GPS Disciplined Oscillators with Respect to UTC(NIST)

August 29, 2005

Author(s)

Michael A. Lombardi, Andrew N. Novick, Victor S. Zhang

Global Positioning System Disciplined Oscillators (GPSDOs) are now the primary standard of time and frequency at many laboratories and calibration facilities...

Component-Level Demonstration of a Microfabricated Atomic Frequency Reference

August 29, 2005

Author(s)

Vladislav Gerginov, Svenja A. Knappe, P Schwindt, V Shah, Li-Anne Liew, John Moreland, Hugh Robinson, Leo W. Hollberg, John E. Kitching, Alan Brannon, J Breitbarth, Z Popovic

We demonstrate component-level functionality of the three critical subsystems for a chip-scale atomic clock: the physics package, the local oscillator and the...

A New Microwave Synthesis Chain for the Primary Frequency Standard NIST-F1

August 29, 2005

Author(s)

Thomas P. Heavner, Steven R. Jefferts, Elizabeth A. Donley, F Levi, Thomas E. Parker

We present the design and measurements of the microwave synthesis chain presently used in NIST-F1, the laser-cooled cesium fountain primary frequency standard...

A Comparison of GPS Common-View Time Transfer to All-in-View

August 29, 2005

Author(s)

Marc A. Weiss, G. Petit, Zhiheng Jiang

All-in-view time transfer is being considered to replace common-view for computing the links of International Atomic Time (TAI). Components in all-in-view GPS...

The Inter-American Metrology System (SIM) Common-View GPS Comparison Network

August 29, 2005

Author(s)

Michael A. Lombardi, Andrew N. Novick, Jose M. Lopez, Jean-Simon Boulanger, Raymond Pelletier

The Inter-American Metrology System (SIM) consists of national metrology institutes in 34 member nations located throughout North, Central, and South America...

Sources of Instabilities in Two-Way Time Transfer

August 29, 2005

Author(s)

Thomas E. Parker, Victor S. Zhang

Two-Way Satellite Time and Frequency Transfer (TWSTFT) has become an important component in the international system for comparing time and frequency over long...

On the Power Dependence of Extraneous Microwave Fields in Atomic Frequency Standards

August 29, 2005

Author(s)

Steven R. Jefferts, Jon H. Shirley, Neil Ashby, Thomas P. Heavner, Elizabeth A. Donley, F Levi

We show that the frequency bias caused by distributed cavity phase has a strong dependence on microwave power. We also show that frequency biases associated...

Laser cooling and launching performance in a (1,1,1) –geometry atomic fountain

August 29, 2005

Author(s)

Elizabeth A. Donley, Thomas P. Heavner, John O'Brien, Steven R. Jefferts, F Levi

We have successfully cooled and launched cesium atoms in the (1,1,1) atomic fountain geometry at temperatures as low as 0.8 mK. This corresponds to a mean...

Evaluation of Pressure Oscillator Losses

August 29, 2005

Author(s)

Peter E. Bradley, Michael A. Lewis, Ray Radebaugh

Efficiencies of regenerative cryocoolers are influenced by losses within the pressure oscillator (compressor). An evaluation of these losses is important when...

W-band dual channel AM/PM noise measurement system - an update

August 29, 2005

Author(s)

Archita Hati, Craig Nelson, J Nava, David A. Howe, Fred L. Walls, Huascar Ascarrunz, Justin Lanfranchi, Bill Riddle

We discuss the performance of a W-band (92-96) GHz amplitude modulated (AM) and phase modulated (PM) noise measurement system. The system uses two nearly...

Vibration-induced PM Noise in Oscillators and Measurements of Correlation with Vibration Sensors

August 29, 2005

Author(s)

David A. Howe, Justin Lanfranchi, Lauren Cutsinger, Archita Hati, Craig Nelson

We present data which shows correlations between phase fluctuations in a low g-sensitive 10 MHz oven-controlled quartz oscillator (OCXO) and acceleration...

Comparison and Status of Low-noise X-band Oscillator and Amplifier Technologies

August 29, 2005

Author(s)

David A. Howe, Archita Hati

his study compares the phase noise of different classes of oscillators and amplifiers that work at X-band. Best-in-class results are presented based on recent...

Impedance Measurements of Inertance Tubes

August 29, 2005

Author(s)

Michael A. Lewis, Peter E. Bradley, Ray Radebaugh

The flow impedance of an inertance tube 5.74 mm inside diameter and 2.36 m long coupled to various reservoir volumes was measured and compared with that...

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