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.

Conferences

Development and investigation of intrinsically shunted junction series arrays for ac Josephson voltage standards

June 13, 2010

Author(s)

Johannes Kohlmann, Franz Mueller, Oliver F. kieler, D. Schleussner, B Egeling, Ralf Behr, David I. Olaya, Paul Dresselhaus, Samuel Benz

Different types of intrinsically shunted Josephson junctions have been developed and inves¬tigated for ac voltage standard applications at PTB. The first type...

Establishing an ac Josephson voltage standard at NRC

June 13, 2010

Author(s)

Piotr S. Filipski, M. Boecker, Samuel Benz, Charles J. Burroughs

NRC recently established an AC Josephson Voltage Standard (ACJVS) system based on a NIST pulse-driven Josephson-junction array. This paper describes the efforts...

Development of a Four-channel System for Johnson Noise Thermometry

June 13, 2010

Author(s)

Alessio Pollarolo, Jifeng Qu, Horst Rogalla, Paul Dresselhaus, Samuel Benz

Long integration time is necessary to reach low uncertainty when measuring temperature through Johnson Noise Thermometry (JNT). The main goal of the NIST JNT...

Effects of fiber gripping methods on single fiber tensile test using Kolsky bar

June 10, 2010

Author(s)

Jae Hyun Kim, Richard L. Rhorer, Haruki Kobayashi, Walter G. McDonough, Gale A. Holmes

Preliminary data by Ming Cheng et al. indicate minimal impact of strain rate on the tensile stress-strain behavior of Kevlar. However, technical issues...

Nanoparticle Separation and Metrology by Three-Dimensional Nanofluidic Size Exclusion

June 8, 2010

Author(s)

Samuel M. Stavis, Jon C. Geist, Michael Gaitan

Polymer Photochemistry at the EUV Wavelength

June 8, 2010

Author(s)

Charles S. Tarrio, Theodore Fedynyshyn, Russell Goodman, Alberto Cabral, Thomas B. Lucatorto

Nanomechanical standards based on the intrinsic mechanics of molecules and atoms

June 7, 2010

Author(s)

Jon R. Pratt, Gordon A. Shaw, Douglas T. Smith

For more than a decade, instruments based on local probes have allowed us to touch objects at the nanoscale, making it possible for scientists and engineers to...

Small mass measurements for tuning fork-based force microscope cantilever spring constant calibration

June 7, 2010

Author(s)

Gordon A. Shaw, Jon R. Pratt, Zeina J. Kubarych

Cutting edge mass sensors are capable of discriminating mass changes as small as several dozens of atoms, however the smallest mass commercially available from...

Understanding the Hazards of Grouped Electrical Cables

June 7, 2010

Author(s)

Kevin B. McGrattan, Andrew J. Lock, Marc R. Nyden, Jason Dreisbach, Nathan D. Marsh, David Stroup

CHRISTIFIRE (Cable Heat Release, Ignition, and Spread in Tray Installations during FIRE) is a U.S. Nuclear Regulatory Commission Office of Research program to...

Dynamic Deformation of Jacketed Lead Bullets Captured By High Speed DIC

June 7, 2010

Author(s)

Steven P. Mates

The development of high fidelity simulations of lead-cored bullet impacts on soft body armor, motivated by the need for improved armor designs and performance...

Nanoparticle Separation and Metrology by Three-Dimensional Nanofluidic Size Exclusion"

June 6, 2010

Author(s)

Samuel Stavis, Jon Geist, Michael Gaitan

Nanoparticle size and shape evaluation using the TSOM optical microscopy method

June 6, 2010

Author(s)

Ravikiran Attota, Richard J. Kasica, Lei Chen, Premsagar P. Kavuri, Richard M. Silver, Andras Vladar

We present a novel optical TSOM (through-focus scanning optical microscopy - pronounced as 'tee-som') method that produces nanoscale dimensional measurement...

A Multicomponent and Multiphase Model of Reactive Wetting

June 4, 2010

Author(s)

Walter Villanueva, William J. Boettinger, Geoffrey B. McFadden, James A. Warren

A diffuse-interface model of reactive wetting with intermetallic formation is presented. The model incorporates fluid flow, solute diffusion, and phase change...

Document Image Collection Using Amazon s Mechanical Turk

June 4, 2010

Author(s)

Audrey N. Tong, Mark A. Przybocki

We present findings from a collaborative effort aimed at testing the feasibility of using Amazon s Mechanical Turk as a data collection platform to build a...

Degradation and Nanoparticle Release of Nanocomposite Coatings Exposed to UV Radiation

June 2, 2010

Author(s)

Tinh Nguyen, Bastien T. Pellegrin, Coralie Bernard, Xiaohong Gu, Justin M. Gorham, Paul E. Stutzman, Alexander J. Shapiro, Walter E. Byrd, Joannie W. Chin

The release of nanoparticles from nanocomposite coatings during their life cycle potentially has negative effects to the environments and presents a roadblock...

Phase Noise in the Photodetection of Ultrashort Optcial Pulses

June 2, 2010

Author(s)

Jennifer A. Taylor, Franklyn J. Quinlan, Archita Hati, Craig W. Nelson, Scott A. Diddams, Shubahshish Datta, Abhay Joshi

Femtosecond laser frequency combs provide an effective and efficient way to take an ultra-stable optical frequency reference and divide the signal down into the...

Phase noise suppression in frequency comb generators

June 2, 2010

Author(s)

Craig W. Nelson, Archita Hati, J F. Nava-garcia, David A. Howe

We propose an idea to suppress the flicker (1/f) noise in radio frequency (RF) multiplier based frequency comb generators. Comb generators are often used for...

Low-Frequency Characterization of MEMS-Based Portable Atomic Magnetometer

June 2, 2010

Author(s)

Rahul R. Mhaskar, Svenja A. Knappe, John E. Kitching

Atomic magnetometers based on absorption or polarization rotation of light in an alkali vapor have recently demonstrated sensitivities rivaling those of...

High Spectral purity oscillator at 40 GHz: Design using air-dielectric Cavity

June 2, 2010

Author(s)

Archita Hati, Craig W. Nelson, Billy F. Riddle, David A. Howe

We describe the design of a low-PM noise 40 GHz oscillator that uses a conventional air-dielectric cavity resonator as a frequency discriminator to clean up the...

Number Enhancement for Compact Laser-Cooled Atomic Samples by use of Stimulated Radiation Forces

June 2, 2010

Author(s)

Elizabeth A. Donley, Tara C. Liebisch, Eric M. Blanshan, John E. Kitching

For cold samples of laser-cooled atoms to be most useful in emerging technologies such as compact atomic clocks and sensors, it is necessary to achieve small...

Medium-Term Frequency Stability of Hydrogen Masers as Measured by a Cesium Fountain

June 2, 2010

Author(s)

Thomas E. Parker, Steven R. Jefferts, Thomas P. Heavner

Abstract Hydrogen masers are used extensively in time scale ensembles, but the frequency drift must be accurately known. NIST-F1, the cesium fountain primary...

Dual-rate linear optical sampling for remote monitoring of complex modulation formats

June 2, 2010

Author(s)

Tasshi Dennis, Paul A. Williams

We demonstrate linear optical sampling using simultaneous pulsed and CW local oscillators to enable phase tracking of a data modulated carrier. The technique...

Towards a compact cold atom frequency standard based on coherent populatoin trapping

June 2, 2010

Author(s)

Francois-Xavier R. Esnault, Elizabeth Donley, John Kitching

We describe in this paper the main features of a cold atom CPT based frequency standard. We explain our particular CPT configuration and our experimental setup...

Standard Reference Material 640d for X-ray Metrology

June 1, 2010

Author(s)

David R. Black, Donald A. Windover, Albert Henins, David L. Gil, James J. Filliben, James P. Cline

The National Institute of Standards and Technology (NIST) certify a variety of standard reference materials (SRM) to address specific aspects of instrument...

New Methods for the Direct Extraction of Mobility and Series Resistance from a Single Ultra-Scaled Device

June 1, 2010

Author(s)

Jason P. Campbell, Kin P. Cheung, Liangchun (. Yu, John S. Suehle, Kuang Sheng, A Oates

A reliable extraction methodology for both quantities directly from a single ultra-scaled device is extremely important and urgently needed. In this work, we...

Ignition Delay of Fatty Acid Methyl Ester Fuel Droplets: Microgravity Experiments and Detailed Numerical Modeling

June 1, 2010

Author(s)

Anthony J. Marchese, Timothy L. Vaughn, Kenneth Kroenlein, Frederick L. Dryer

Recent optical engine studies have linked increases in NOx emissions from fatty acid methyl ester combustion to differences in the premixed autoignition zone of...

Sustainable Manufacturing: Metrics, Standards, and Infrastructure - Workshop Summary

May 31, 2010

Author(s)

Sudarsan Rachuri, Ram D. Sriram, Anantha Narayanan Narayanan, Prabir Sarkar, Jae H. Lee, Kevin W. Lyons, Sharon J. Kemmerer

This report summarizes the presentations, discussions, and recommendations of the NIST Workshop Sustainable Manufacturing: Metrics, Standards, and...

A Low Complexity Interference Cancellation Technique for Multi-User DS-CDMA Communications

May 27, 2010

Author(s)

Wen-Bin Yang, Kamran Sayrafian

A low complexity Parallel Interference Cancellation (PIC) technique is proposed to suppress Multi-Access Interference (MAI) and minimize near-far effect for...

A Design Framework for High-Density Wireless Ad Hoc Networks Achieving Cooperative Diversity

May 24, 2010

Author(s)

Hamid Gharavi, Bin Hu

In this paper, we present a systematic design structure for high-density ad hoc networks aimed at achieving full cooperative diversity, based on which the PHY...

Database-Assisted Design for Wind Effects on High-Rise Structures and Its Potential for Assessment of CFD Simulation

May 24, 2010

Author(s)

Dong Hun Yeo, Emil Simiu

Efforts are being made to perform CFD-based estimates of wind effects on tall buildings that are sufficiently reliable to allow their use in lieu of estimates...

Was this page helpful?