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Conferences

Power Spectral Density: Is it right?

June 13, 2010

Author(s)

Ulf Griesmann, John Lehan, Jiyoung Chu

We concentrate on the instrumental issues surrounding power spectral density (PSD) determination, using as an example, the most common optical shop QA tool, the...

A Simple Method to Improve Etching Uniformity when Making Phase Type CGHs on a Thick Glass Substrate

June 13, 2010

Author(s)

Quandou (. Wang

A simple method to optimize the etching uniformity when making a Computer generated halogram on a thick optical glass substrate is described, which uses a...

A Toolbox for Designing and Analyzing Phase-Shifting Interferometry Algorithms with Characteristic Polynomials

June 13, 2010

Author(s)

Ulf Griesmann

Many of the recent advances in understanding of phase-shifting algorithms have yet to be incorporated into the software for commercial phase shifting...

Calibrations of Current-to-Voltage Transimpedance Amplifiers Using Electrical Standards

June 13, 2010

Author(s)

Howard W. Yoon, George P. Eppeldauer, Dean G. Jarrett, Thomas C. Larason, Wan-Seop Kim

For photocurrent measurements with low uncertainties, a wide-dynamic range current-to-voltage converter traceable to resistance standards has been developed at...

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 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...

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...

Design of the NIST 10 V programmable Josephson voltage standard system

June 13, 2010

Author(s)

Charles J. Burroughs, Paul Dresselhaus, Alain Rufenacht, Mike Elsbury, Samuel Benz

NIST has developed and implemented a new Programmable Josephson Voltage Standard (PJVS) that operates at 10 V. This next-generation system is optimized for both...

Reduced Nonlinearities in the NIST Johnson Noise Thermometry System

June 13, 2010

Author(s)

Jifeng Qu, Samuel Benz, Alessio Pollarolo, Horst Rogalla

Improved electronics and synthesized noise waveforms for the NIST quantum-voltage-standard- calibrated Johnson noise thermometer (JNT) have lead to reduced...

Quantifying How Lighting and Focus Affect Face Recognition Performance

June 13, 2010

Author(s)

J. R. Beveridge, David Bolme, Bruce A. Draper, Geof H. Givens, Yui M. Lui, P. Jonathon Phillips

Recent studies show that face recognition in uncontrolled images remains a challenging problem, although the reasons why are less clear. Changes in illumination...

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...

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...

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...

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...

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...

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...

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...

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...

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