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

Carbon nanotube arrays for absolute IR and THz radiometry

October 2, 2011

Author(s)

John H. Lehman, Kerry N. Betz, Erich N. Grossman

We have assembled and evaluated a novel electrically calibrated thermopile having an array of 1.5 mm long multiwalled carbon nanotubes as the radiation absorber...

Microfluidic Transport and Sensing of Functionalized Superparamagnetic Beads with Integrated Spin-Valves

October 2, 2011

Author(s)

Wendy R. Altman, John M. Moreland, Stephen E. Russek, Victor M. Bright

This work describes a novel microfluidic platform to trap, release, transport, and detect superparamagnetic beads (SPBs) with magnetic spin-valves (SVs). This...

Measuring the Gy preventing convection in water calorimetry using a low duty cycle modulated beam

October 1, 2011

Author(s)

Huaiyu H. Chen-Mayer, Ronald E. Tosh

The most fundamental method for determining the absorbed dose to water by radiation beams is by measuring the consequent temperature increase of the water...

Strategies for Nanoscale Contour Metrology using Critical Dimension Atomic Force Microscopy

September 30, 2011

Author(s)

Ndubuisi G. Orji, Ronald G. Dixson, Andras Vladar, Michael T. Postek

Contour metrology is one of the techniques used to verify optical proximity correction (OPC) in lithography models. The use of these methods, which are known as...

Calibration and Deployment of a New NIST Transfer Radiometer for Broadband and Spectral Calibration of Space Chambers (MDXR)

September 30, 2011

Author(s)

Timothy M. Jung, Adriaan C. Carter, Solomon I. Woods, Simon G. Kaplan

The Low-Background Infrared (LBIR) facility at NIST has performed on-site calibration and initial off-site deployments of a new infrared transfer radiometer...

Service Life Prediction for Sealants

September 29, 2011

Author(s)

Christopher C. White, Donald L. Hunston, Kar T. Tan, James J. Filliben

Previous industry consensus postulated that four elements of the weather: Temperature, Humidity, Ultraviolet Radiation, and Mechanical loading were responsible...

5754 Aluminum Sheet Deformed Along Bi-Linear Strain Paths

September 29, 2011

Author(s)

Mark A. Iadicola, Lin Hu, Anthony D. Rollett, Timothy J. Foecke

Sheet specimens of aluminum alloy 5754 were deformed along a series of bi-linear, equal-biaxial and uniaxial, strain paths while simultaneously measuring stress...

Distributed Deployment Algorithms for Improved Coverage in Mobile Sensor Networks

September 28, 2011

Author(s)

Vladimir V. Marbukh, Kamran Sayrafian, Hamid Mahboubi, Kaveh Moezzi, Amir G. Aghdam

In this paper, various sensor deployment strategies are studied for effective coverage in wireless sensor networks. In the proposed algorithms, each sensor...

A Mathematical Model of Joint Congestion Control and Routing in Multisource Networks

September 28, 2011

Author(s)

Fern Y. Hunt, Vladimir V. Marbukh, Yi Wang

In this paper we study a model of joint congestion control and routing in a ring of network sources with a single destination at the center. A utility...

THz Spectroscopic Study of Iron Oxide Layers within Steel-Reinforced Structural Components

September 26, 2011

Author(s)

Virgil Provenzano, Shin G. Chou

In this study, we use THz-based spectroscopy as a non-destructive diagnostic tool to characterize the corrosion by-products (rust) on aged iron structural...

An Iterative Algorithm for Calculating Stylus Radius Unambiguously

September 24, 2011

Author(s)

Theodore V. Vorburger, Xiaoyu A. Zheng, Thomas B. Renegar, Jun-Feng Song, Li Ma

The stylus radius is an important specification for stylus instruments and is commonly provided by instrument manufacturers. However, it is difficult to measure...

An Experimental and Computational Study of Approach Air Distribution for a Finned-Tube Heat Exchanger

September 21, 2011

Author(s)

David A. Yashar

A Laser-Cooled Frequency Standard for GPS

September 20, 2011

Author(s)

Thomas P. Heavner, Stephan E. Barlow, Marc A. Weiss, Neil Ashby, Steven R. Jefferts

NIST is in an initial phase of developing a prototype laser-cooled atomic frequency standard (AFS) for potential use in a future GPS system. The expected...

International comparisons of optical fiber power measurements

September 19, 2011

Author(s)

Igor Vayshenker, David J. Livigni, Xiaoyu X. Li, John H. Lehman

We discuss the results of optical fiber power meter (OFPM) measurements at 1310 and 1550 nm made by NIST and seven national measurement institutes (NMIs). We...

Extending single-photon optimized superconducting transition edge sensors beyond the single-photon counting regime

September 19, 2011

Author(s)

Thomas Gerrits, Brice R. Calkins, Nathan A. Tomlin, Adriana E. Lita, Alan L. Migdall, Sae Woo Nam, Richard P. Mirin

Photon number resolving transition-edge sensors (TES) are the cutting-edge enabling technology for high quantum efficiency photon number counting. The TES...

Fully lithographic fiber-coupled cryogenic radiometer for picowatt powers

September 19, 2011

Author(s)

Nathan A. Tomlin, John H. Lehman, Sae Woo Nam

A new type of absolute cryogenic radiometer has been fabricated at the microscale level for direct substitution optical fiber power measurements. It consists of...

Modeling of Bolted Connections for Collapse Analysis of Steel Structures

September 19, 2011

Author(s)

Joseph A. Main, Fahim Sadek

In structural collapse scenarios, beam to column connections can be subjected to large rotations as the structure deforms, in addition to large axial forces...

Absolute high-power laser measurements with a flowing water power meter

September 18, 2011

Author(s)

Christopher L. Cromer, Xiaoyu X. Li, John H. Lehman, Marla L. Dowell

We describe a novel flowing water power meter (FWOPM) for high-power laser radiometry in the range of 50 W to 10 kW. The FWOPM has several design features; a...

Performance of Hybrid 4.5kV SiC JBS Freewheeling Diode and Si IGBT

September 16, 2011

Author(s)

Karl Hobart, Eugene Imhoff, F. J. Kub, Allen R. Hefner Jr., Tam H. Duong, Jose M. Ortiz, Sei-Hyung Ryu, David Grider, Scott G. Leslie, Jerry Sherbondy, B Ray

Testing Passive UHF Tag Performance Evolution

September 15, 2011

Author(s)

Daniel G. Kuester, David R. Novotny, Jeffrey R. Guerrieri, Zoya Popovic

Trends in tag development since the introduction of the ISO 18000-6C and EPC Global standards are investigated empirically with measurements of power harvesting...

MEASUREMENTS OF EFFECTIVE DIFFUSION COEFFICIENT OF HELIUM AND HYDROGEN THROUGH GYPSUM

September 14, 2011

Author(s)

Jiann Yang, William M. Pitts, Marco Fernandez, Kuldeep Prasad

An experimental apparatus, which was based on the ¿-scale garage previously used for studying helium release and dispersion in our laboratory, was used to...

Chip-scale room-temperature atomic magnetometers for biomedical measurements

September 14, 2011

Author(s)

Svenja A. Knappe, Rahul R. Mhaskar, Jan Preusser, John E. Kitching, Lutz Trahms, Tillman H. Sander

We describe a portable 4-channel array of chip-scale atomic magnetometers in a flexible flying-lead configuration. These microfabricated, uncooled sensors with...

The mechanisms of damage in ballistic fibers

September 13, 2011

Author(s)

Walter G. McDonough, Haruki Kobayashi, Jae Hyun Kim, Amanda L. Forster, Kirk D. Rice, Gale A. Holmes

Construction of a High Power OPO Laser system for Differential Absorption LIDAR

September 13, 2011

Author(s)

Kevin O. Douglass, Stephen E. Maxwell, David F. Plusquellic, Joseph T. Hodges, Roger D. van Zee, Daniel V. Samarov, James R. Whetstone

Our goal is to develop and characterize optical measurement technology to enable accurate quantification of greenhouse-gas emissions to meet the needs of...

Interference Mitigation for Body Area Networks

September 12, 2011

Author(s)

Wen-Bin Yang, Kamran Sayrafian

Due to ultra-low power communication, BAN is most likely a victim system. Interference from other BANs or other coexisting wireless communication systems may be...

High Mobility Channel from the Prospective of Random Telegraph Noise

September 12, 2011

Author(s)

Kin P. Cheung, Jason P. Campbell

We experimentally verify for the first time that random telegraph noise (RTN) in ultra-scaled MOSFETs is related to the inversion charge density in the channel...

Circuit-Aware Device Reliability Criteria Methodology

September 12, 2011

Author(s)

Jason T. Ryan, Lan Wei, Jason P. Campbell, Richard G. Southwick, Kin P. Cheung, Anthony Oates, John S. Suehle, Phillip Wong

Meeting reliability requirements is an increasingly more difficult challenge with each generation of CMOS technology. The disconnection between conventional one...

An IEEE 1588 Performance Testing Dashboard for Power Industry Requirements

September 12, 2011

Author(s)

Julien M. Amelot, Ya-Shian Li-Baboud, Clement Vasseur, Jeffrey Fletcher, Dhananjay Anand, James Moyne

The numerous time synchronization performance requirements in the Smart Grid entails the need for a set of common metrics and test methods to verify the ability...

A Field Study of User Behavior and Perception in Smartcard Authentication

September 9, 2011

Author(s)

Emile L. Morse, Celeste L. Paul, Aiping L. Zhang, Yee-Yin Choong, Mary F. Theofanos

A field study of 24 participants over 10 weeks explored user behavior and perception in a smartcard authentication system. Ethnographic methods used to collect...

Linking Degree of Filler Dispersion to Photodegradation Rate in a NanoTiO2-Latex Coating: An Accelerated Weathering Study

September 4, 2011

Author(s)

Li Piin Sung, Yongyan Pang, Stephanie S. Watson

The objective of this study is to investigate the influence of the filler dispersion of nano-TiO2 in polymeric coatings on the surface morphology evolution of...

Was this page helpful?