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

Systematic error in the precision measurement of the mean wavelength of a nearly monochromatic neutron beam due to geometric errors

December 3, 2009

Author(s)

Kevin J. Coakley, Maynard S. Dewey, Andrew T. Yue, Alexander Laptev

Many experiments at neutron scattering facilities require nearly monochromatic neutron beams. In such experiments, one must accurately measure the mean...

Hyperspectral Imager Characterization and Calibration

December 1, 2009

Author(s)

John T. Woodward IV, Steven W. Brown, Allan W. Smith, Keith R. Lykke

Current radiometric calibration standards, specifically blackbody and lamp-based optical radiation sources, produce spatially, spectrally, and temporally simple...

Gradient Nanofiber Scaffold Libraries for Rapid Screening of Cell-Material Interactions

December 1, 2009

Author(s)

Carl G. Simon Jr., Murugan Ramalingam, Marian F. Young, Vinoy Thomas

Scaffolds play a key role in tissue engineering wherein they provide structural support for cells to adhere, grow and guide them to synthesize tissue. Scaffolds...

Robust Noise Filtering in Frequency-Invariant Beamforming with Uniform Circular Arrays

November 30, 2009

Author(s)

Camillo A. Gentile

Accurate signal measurement in the spatial-temporal domain is critical, amongst other applications, to the commercial success of UWB-MIMO communication systems...

Rapidly-Deployable Mesh Network Testbed

November 30, 2009

Author(s)

Michael R. Souryal, Nader Moayeri, Andreas Wapf

This paper describes a wireless mesh network testbed for research in rapid deployment and auto-configuration of mesh nodes. Motivated by the needs of first...

Stochastic Modeling of Coaxial-Connector Repeatability Errors

November 30, 2009

Author(s)

Arkadiusz C. Lewandowski, Dylan F. Williams

We propose a new description of connector or repeatability errors for coaxial one-port devices. Our approach is based on a stochastic model constructed as a...

A Quality Pre-Processor for Biological Cell Images

November 30, 2009

Author(s)

Adele P. Peskin, Karen Kafadar, Alden A. Dima

We have developed a method to rapidly test the quality of a biological image, to identify appropriate segmentation methods, if any, that will render high...

The Benefits of Network Coding over a Wireless Backbone

November 30, 2009

Author(s)

Hui Guo, Yi Qian, Kejie Lu, Nader Moayeri

Network coding is a promising technology that can effectively improve the efficiency and capacity of multi-hop wireless networks by exploiting the broadcast...

Modeling Clinical Tumors to Create Standardized Data for Tumor Volume Measurement

November 29, 2009

Author(s)

Adele P. Peskin, Alden A. Dima

Expanding on our previously developed method for inserting synthetic objects into clinical computerized tomographic (CT) data, we model a set of eight clinical...

Correlating Nanoparticle Dispersion to Surface Mechanical Properties of TiO2/Polymer Composites

November 25, 2009

Author(s)

Yongyan Pang

The main objectives of this study are to characterize the nanoparticle dispersion in polymeric matrices with different mixing chemistry conditions; and to...

EDA Performance and Clock Synchronization Over a Wireless Network: Analysis, Experimentation and Application to Semiconductor Manufacturing

November 24, 2009

Author(s)

Dhananjay Anand, Deepak Sharma, Ya-Shian Li-Baboud, James Moyne

Shrinking process tolerances due to decreasing device sizes and increasing chip complexity in semiconductor manufacturing are motivating efforts to improve...

Performance Measurements Towards Improved Manufacturing Vehicle Safety

November 23, 2009

Author(s)

Roger V. Bostelman, William P. Shackleford

In this paper, we describe the current 2D (dimensional) sensor and ideal sensor configurations if 3D imagers are mounted on manufacturing vehicles in an attempt...

Mobile Microrobot Characterization through Performance-Based Competitions

November 19, 2009

Author(s)

Jason J. Gorman, Craig D. McGray, Richard A. Allen

Recent advances in the design and fabrication of microelectromechanical systems (MEMS) have enabled the development of mobile microrobots that can autonomously...

Optical TSOM method for 3D interconnect metrology

November 18, 2009

Author(s)

Ravikiran Attota

There is a great need for high accurate, truly-3D metrology solutions that can be used for analysis of high aspect ratio features such as through-silicon-vias...

Distributing UTC(NIST) to Industrial Time and Frequency Users

November 18, 2009

Author(s)

Michael A. Lombardi, Victor S. Zhang

The National Institute of Standards and Technology (NIST) maintains one of the world s most accurate and stable time scales, UTC(NIST), as well as the NIST-F1...

Simulation Study of Body Surface RF Propagation for UWB Wearable Medical Sensors

November 17, 2009

Author(s)

Kamran Sayrafian, Wen-Bin Yang

Ultra Wide-Band (UWB) is a favorable technology for wearable medical sensors that monitor vital signs and other health-related information. Efficient...

Ontology Development For Low-Energy Building Embedded Commissioning

November 17, 2009

Author(s)

Kwang Jun Lee, Omer Akin, Burcu Akinci, James Garrett, Steven T. Bushby

This paper presents the results of initial work in developing an ontology for improving information exchange and automation in building system commissioning...

Two-Way Satellite Time and Frequency Transfer Using 1 MChip/S codes

November 16, 2009

Author(s)

Victor S. Zhang, Thomas E. Parker, Demetrios Matsakis, Joseph Achkar, Daniele Rovera, Dirk Piester, Andreas Bauch, Luca Lorini

The Ku-band transatlantic and Europe to Europe two-way satellite time and frequency transfer (TWSTFT) operations used the 2.5 MChip/s pseudo-random codes with 3...

Characterization of Noise Properties in Photodetectors: A Step Toward Ultra-Low Noise Microwaves

November 16, 2009

Author(s)

Jennifer A. Taylor, Franklyn J. Quinlan, Scott A. Diddams

Very low-noise microwave signals are desirable for many state-of-the-art applications, including many types of radar and imaging systems. However, even state-of...

Limits on GPS Carrier Phase Time Transfer

November 16, 2009

Author(s)

Marc A. Weiss

The stability of differential delays between Global Navigation Satellite receivers is critical for time and frequency transfer. We study the limit of this...

Progress on a Portable Rubidium Fountain Frequency Standard

November 16, 2009

Author(s)

Paul D. Kunz, Thomas P. Heavner, Steven R. Jefferts

We are developing a transportable laser-cooled rubidium (Rb) atomic fountain frequency standard. We have a complete optical package, and have recently shown...

Novel, All-Digital Phase Measurement System for Time Scales

November 16, 2009

Author(s)

Stefania Romisch, Thomas E. Parker, Steven R. Jefferts

A novel, all-digital phase measurement system, to be utilized as part of the NIST Time Scale at NIST in Boulder, CO is presented. The system is used to compare...

Phase-lock Loops in Vibration Environments

November 16, 2009

Author(s)

Archita Hati, Craig W. Nelson, David A. Howe

A popular scheme for achieving low phase noise across a large range of offset frequencies is to employ an oscillator at an output frequency with low far-from...

EXPLORING THE BAG-OF-WORDS METHOD FOR 3D SHAPE RETRIEVAL

November 10, 2009

Author(s)

Afzal A. Godil, Xiaolan Li

EXPLORING THE BAG-OF-WORDS METHOD FOR 3D SHAPE RETRIEVAL

Nonlinear calibration of polarimetric radar cross section systems

November 4, 2009

Author(s)

Lorant A. Muth

Polarimetric radar cross section systems are characterized by polarimetric system parameters $\epsilon_h$ and $\epsilon_v$. These parameters can be obtained...

A DATA FLOW IMPLEMENTATION OF AGENT-BASED DISTRIBUTED GRAPH SEARCH

November 4, 2009

Author(s)

Imad Hamchi, Mathieu Hoarau, Antoine Fillinger, Nicolas Crouzier, Lukas Diduch, Martial Michel, Vincent M. Stanford

Biological ants organize themselves into forager groups that converge to shortest paths to and from food sources. This has motivated development a large class...

Herding, Second Preimage, and Trojan Message Attacks Beyond Merkle-Damgaard

November 3, 2009

Author(s)

Elena Andreeva, Charles Bouillaguet , Orr Dunkelman, John M. Kelsey

In this paper we present new attack techniques to analyze the structure of hash functions that are not based on the classical Merkle-Damgaard construction. We...

A proposed global atmospheric monitoring networkbased on standard stars

November 2, 2009

Author(s)

Gerald T. Fraser, Steven W. Brown, Keith R. Lykke, John T. McGraw, Allan W. Smith, John T. Woodward IV, Peter C. Zimmer, Christopher W. Stubbs

The feasibility of developing a network of telescopes to monitor the composition of the nighttime atmosphere using stellar spectrophotometry is explored...

DIAMETER AND FORM MEASUREMENT OF A MICRO-HOLE IN A FUEL INJECTOR NOZZLE WITH THE NIST FIBER PROBE

November 2, 2009

Author(s)

Balasubramanian Muralikrishnan, Jack A. Stone Jr., John R. Stoup

We discuss the measurement of diameter and form of micro-holes with reverse tapers in a fuel injector nozzle using an ultra-low force contact fiber probe on a...

A Novel Wafer-plane Dosimeter for EUV Lithography

November 1, 2009

Author(s)

Steven E. Grantham, Charles S. Tarrio

Extreme Ultraviolet Lithography (EUVL) incorporates 13.5 nm light for patterning wafers and requires in-situ wafer-plane dosimetry that can be tailored to the...

Was this page helpful?