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Search Publications

NIST Authors in Bold

Displaying 29101 - 29125 of 73697

Measuring the Effectiveness of the s-Metric to Produce Better Network Models

December 7, 2008
Author(s)
Isabel M. Beichl, Brian D. Cloteaux
Recent research has shown that while many complex networks follow a power-law distribution for their vertex degrees, it is not sufficient to model these networks based only on their degree distribution. In order to better distinguish between these networks

Infrared emission imaging as a tool for characterization of hydrogen storage materials

December 6, 2008
Author(s)
H. Oguchi, Edwin J. Heilweil, Daniel Josell, Leonid A. Bendersky
Combinatorial thin films provide an opportunity for studying a variety of properties over a wide range of compositions and microstructures on a single substrate, allowing substantial acceleration of both the fabrication and study of materials and their

A review of time and frequency transfer methods

December 5, 2008
Author(s)
Judah Levine
I will discuss three methods of transmitting time and frequency information: one-way, two-way and common-view. I will describe the advantages and limitations of the different methods including ncertainty estimates for systems that are based on them.

Improvements to the NIST Network Time Protocol Servers

December 5, 2008
Author(s)
Judah Levine
The National Institute of Standards and Technology operates 22 network time servers at various locations. These servers respond to requests for time in a number of different formats, and provide time stamps that are directly traceable to the NIST atomic

Realizing UTC (NIST) at a Remote Location

December 5, 2008
Author(s)
Judah Levine
I will describe the backup time scale system that I have constructed at the site of the NIST radio stations near Fort Collins, Colorado, and I will compare its performance to the primary ensemble in Boulder. The Fort Collins system is designed to be a

Silicon Nanowire NVM Cell Using High-k Dielectric Charge Storage Layer

December 5, 2008
Author(s)
Xiaoxiao Zhu, Yang Yang, Qiliang Li, D. E. Ioannou, John S. Suehle, Curt A. Richter
Si nanowire (SiNW) channel non-volatile memory (NVM) cells were fabricated by a 'self-alignment' process. First, a layer of thermal SiO2 was grown on a silicon wafer by dry oxidation, and the SiNWs were then grown by chemical vapor deposition in pre

A New Shape Benchmark for 3D Object Retrieval

December 3, 2008
Author(s)
Rui Fang, Afzal A. Godil, Xiaolan Li, Asim Wagan
Recently, content based 3D shape retrieval has drawn more and more attention by researchers. How to properly evaluate the result of shape searching algorithms is important. Benchmarking is one answer to this question. Due to the limitations of current

An Interaction-based Test Sequence Generation Approach for Testing Web Applications

December 3, 2008
Author(s)
Wenhua Wang, Sreedevi Sampath, Yu Lei, Raghu N. Kacker
Web applications often use dynamic pages that interact with each other by accessing shared objects, e.g., session objects. Interactions between dynamic pages need to be carefully tested, as they may give rise to subtle faults that cannot be detected by

Bio-Imaging Toolkit for Indexing, Searching, Navigation, Discovery and Annotation

December 3, 2008
Author(s)
Afzal A. Godil, Chun Pan (Benny) Cheung, Asim Wagan, Xiaolan Li
Bio-imaging toolkit is an application for biological imaging community that will bring in the latest efforts in indexing, searching, navigation, discovery, analysis and annotation for both biological image and video collections. This paper discusses both

Spatially Enhanced Bags of Words for 3D Shape Retrieval

December 3, 2008
Author(s)
Xiaolan Li, Afzal A. Godil, Asim Wagan
This paper presents a new method for 3D shape retrieval based on the bags-of-words model along with a weak spatial constraint. First, a two-pass sampling procedure is performed to extract the local shape descriptors, based on spin images, which are used to

Surface Potential Imaging of Solution Processable Acene-Based Thin Film Transistors

December 2, 2008
Author(s)
Lucile C. Teague, Behrang H. Hamadani, John E. Anthony, David J. Gundlach, James G. Kushmerick, Sanker Subramanian, Thomas Jackson, Curt A. Richter, Oana Jurchescu
We report scanning Kelvin probe microscopy (SKPM) of electrically biased difluoro bis(triethylsilylethynyl) anthradithiophene (diF-TESADT) organic thin film transistors. SKPM reveals the relationship between the diF-TESADT film structure and device

Blind estimation of general tip shape in AFM imaging

December 1, 2008
Author(s)
Fenglei Tian, Xiaoping Qian, John S. Villarrubia
The use of flared tip and bi-directional servo control in some recent atomic force microscopes (AFM) has made it possible for these advanced AFMs to image structures of general shapes with undercuts and reentrant surfaces. Since AFM images are distorted

Building Quantum Computers

December 1, 2008
Author(s)
Emanuel H. Knill
In theory, quantum computers can be used to efficiently factor numbers, quadratically speed up many search and optimization problems, and enable currently impossible physics simulations. At first, quantum states appeared to be too fragile for implementing

Demonstration of Rapid Multiplex PCR Amplification Involving 16 Genetic Loci

December 1, 2008
Author(s)
Peter Vallone, Carolyn R. Steffen, John M. Butler
Current forensic DNA typing is conducted in approximately eight to ten hours with steps including DNA extraction, quantitation, polymerase chain reaction (PCR) amplification of multiple short tandem repeat (STR) loci, capillary electrophoresis separation

Design of a New Instrument for Cold Neutron Prompt Gamma-Ray Activation Analysis at NIST

December 1, 2008
Author(s)
Rick L. Paul, Richard M. Lindstrom, Christoph W. Brocker, Elizabeth A. Mackey
A new instrument for cold neutron prompt gamma-ray activation analysis (CNPGAA) is being designed and constructed at the NIST Center for Neutron Research (NCNR). The new instrument is expected to have lower gamma-ray and neutron background and better

Detection and segmentation of concealed objects in terahertz images

December 1, 2008
Author(s)
Xilin Shen, Charles Dietlein, Erich N. Grossman, Zoya Popovic, Francois Meyer
Terahertz imaging has been shown to successfully detect objects concealed underneath clothing, by measuring the radiometric temperatures of different objects on a human subject. The goal of this work is to automatically detect and segment concealed objects

Development Life Cycle for Semantically Coherent Data Exchange Specification

December 1, 2008
Author(s)
Boonserm Kulvatunyou, Katherine C. Morris, Simon P. Frechette
In enterprise integration, a data-exchange specification is an architectural artifact that evolves along with the business. Maintaining a coherent, data-exchange, semantic model is an important, yet non-trivial task. A coherent, semantic model of data-

High-speed Nb/Nb-Si/Nb Josephson junctions for superconductive digital electronics

December 1, 2008
Author(s)
David I. Olaya, Burm Baek, Paul Dresselhaus, Samuel Benz
Josephson junctions with cosputtered amorphous Nb-Si barriers are being developed at NIST for use in voltage standard circuits. These junctions have the potential for a wide range of applications beyond voltage standards because their electrical properties
Displaying 29101 - 29125 of 73697
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