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Journals

High Temperature Electrical Resistance of substrate-supported Single Walled Carbon Nanotubes

January 1, 2008

Author(s)

Richard E. Cavicchi, C Avedisian, Paul M. McEuen, Xinjian Zhou, Wilbur S. Hurst, Joseph T. Hodges

We report the electrical characteristics of two substrate-supported metallic single walled carbon nanotubes (SWNT) at temperatures up to 573 K over a range of...

Ultraviolet Photoemission Spectra of Para-Phenylene-Ethynylene Thiols Chemisorbed on Gold

January 1, 2008

Author(s)

Christopher D. Zangmeister, Roger D. van Zee, Steven W. Robey, N E. Gruhn, Yuxing Yao, J M. Tour

Photoemission spectra of para-phenylene-ethynylene thiols chemisorbed on gold have been measured. Four compounds were studied: 4,4'-bis(phenylethynyl)...

Area Measurement of Knife Edge and Cylindrical Apertures using Ultra Low Force Contact Fiber Probe on a CMM

January 1, 2008

Author(s)

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

Several radiometric and photometric measurements depend on high accuracy area measurement of precision apertures. Some apertures have sharp edges and are...

Soft-Decision Metrics for Coded Orthogonal Signaling in Symmetric Alpha-Stable Noise

January 1, 2008

Author(s)

Michael R. Souryal, E G. Larsson, B M. Peric, B R. Vojcic

This paper derives new soft decision metrics for coded orthogonal signaling in impulsive noise, more specifically symmetric alpha-stable noise. For the case of...

MODELING AND MEASURING THE ECONOMIC ROLES OF TECHNOLOGY INFRASTRUCTURE

January 1, 2008

Author(s)

Gregory C. Tassey

Designing and managing an economys technology infrastructure requires both accurate economic models and data to drive them. Previous models treat technology as...

Line Width Measurement Technique Using Through-Focus Optical Images

January 1, 2008

Author(s)

Ravikiran Attota, Richard M. Silver, Ronald G. Dixson

We present a detailed experimental study of a new through-focus technique to measure line width (CD) with nanometer sensitivity using a bright field optical...

Thermodynamic Data to Support High-Temperature Syngas Quench Design: Vapor-Liquid Equilibrium Calculations

January 1, 2008

Author(s)

Allan H. Harvey

procedure has been developed, based on a dilute-solution model of the liquid phase and the rigorous virial expansion for the vapor phase, for modeling the vapor...

Fast automatic registration of range images from 3D imaging systems using sphere targets

January 1, 2008

Author(s)

Marek Franaszek, Geraldine S. Cheok, Christoph J. Witzgall

3D imaging systems are line of sight instruments and multiple scans from different locations are often needed to get a good representation of an entire scene...

Coherent, Adiabatic and Dissociation Regimes in Coupled Atomic-Molecular Bose-Einstein Condensates

January 1, 2008

Author(s)

Pascal Naidon, Eite Tiesinga

We discuss the dynamics of a Bose-Einstein condensate of atoms suddenly coupled to a condensate of molecules by an optical or magnetic Feshbach resonance. Three...

Peridynamic Simulation of Electromigration

January 1, 2008

Author(s)

David T. Read, Walter Gerstle, Stewart Silling, Vinod K. Tewary, Richard Lehoucq

A theoretical framework, based upon the peridynamic model, is presented for analytical and computational simulation of electromigration. The framework allows...

Hydrometer Calibration by Hydrostatic Weighing With Automated Liquid Surface Positioning

January 1, 2008

Author(s)

Jesus J. Aguilera, John D. Wright, Vern E. Bean

We describe an automated apparatus for the calibration of hydrometers by hydrostatic weighing (Cuckow s method). The apparatus uses a laser light sheet and a...

Controlling the Band Gap in Zigzag Graphene Nanoribbons With an Electric Field Induced by a Polar Molecule

January 1, 2008

Author(s)

Sergio Dalosto, Zachary H. Levine

Graphene nanoribbons with both armchair- and zigzag-shaped hydrogen-passivated edges (AGNR and ZGNR) have band gaps. Son et al. showed that the gap s value...

Neutron Self-Shielding Factors for Simple Geometries, Revisited

January 1, 2008

Author(s)

Richard M. Lindstrom, Ronald F. Fleming

To assure quality measurements, the algorithms used in data analysis need to be demonstrably correct. In practice, however, some less transparent or more...

Polymer Microsphere Particle Standards Containing High Explosives

January 1, 2008

Author(s)

Matthew E. Staymates, Jennifer R. Verkouteren, Jessica L. Staymates, John G. Gillen, Cory Berkland, Robert A. Fletcher

Cell Adhesion and Spreading on Poly(D,L-lactic acid) Films Pre-Aged in Cell Medium

January 1, 2008

Author(s)

Ruby I. Chen, Nathan D. Gallant, Jack R. Smith, Matt J. Kipper, Carl G. Simon Jr.

From a biomaterials perspective, three primary events can occur when a biodegradable polymer is implanted in vivo: 1) polymer degradation, 2) protein adsorption...

Spatially and Temporally Resolved Thermal Imaging of Cyclically Heated Interconnects by Use of Scanning Thermal Microscopy

January 1, 2008

Author(s)

Nicholas Barbosa, Andrew J. Slifka

A scanning thermal microscope (SThM) was used to investigate the spatial and temporal distribution of temperature in electrical interconnect structures designed...

Fatigue Damage in Ceramic Coatings From Cyclic Contact :Loading with Tangential Component

January 1, 2008

Author(s)

Yuyan Zhang, J.-W Kim, J H. Kim, Brian R. Lawn

Experimental Line Parameters of the Oxygen A-Band Using Frequency-Stabilized Cavity Ring-Down Spectroscopy

January 1, 2008

Author(s)

D J. Robichaud, Joseph T. Hodges, Linda R. Brown, D Lisak, Piotr Maslowski, Charles E. Miller

Line intensities, self- and air-broadened linewidths, pressure-induced shifts, and collisional narrowing coefficients were measured from 18

High-Precision Pressure Shifting Measurement Technique Using Frequency-Stabilized Cavity Ring-Down Spectroscopy

January 1, 2008

Author(s)

D J. Robichaud, Joseph T. Hodges, D Lisak, Charles E. Miller, Mitchio Okumura

We describe a high-precision method for measuring pressure shifting of absorption lines. The technique involves the acquisition of high-resolution spectra using...

Effect of Irrigants and Cementum Injury on Diffusion of Hydroxyl Ions Through the Dentinal Tubules

January 1, 2008

Author(s)

Sherma Saif, Clifton M. Carey, Patricia Tordik

The purpose of this study was to measure hydroxyl ion diffusion through dentinal tubules. Eighty single-rooted teeth were instrumented and divided into 8 groups...

Optical to UV spectra and birefringence of SiO2 and TiO2: first-principles calculations with excitonic effects

January 1, 2008

Author(s)

H M. Lawler, J J. Rehr, F Vila, SD Dalosto, Eric L. Shirley, Zachary H. Levine

A first-principles approach is presented for calculations of optical to ultraviolet spectra including excitonic effects. The approach is based on the Bethe...

Comparison of SEM and HRTEM CD Measurements Extracted from Test-Structures Having Feature Linewidths from 40 nm to 240 nm

January 1, 2008

Author(s)

Michael W. Cresswell, Richard A. Allen, William F. Guthrie, Christine E. Murabito, Ronald G. Dixson, Amy Hunt

CD (Critical Diminsion) measurements have been extracted from SEM (Scanning Electron Microscopy) and HRTEM (High Resolution Transmission Electron Microscopy)...

Multi-Channel Mobile Ad-Hoc Links for Multimedia Communications

December 31, 2007

Author(s)

Hamid Gharavi

This paper is mainly concerned with multi-channel transmission of real-time information such as video over multi-hop ad-hoc links. We propose two multi-channel...

Making Biometric Systems Usable Let's Not Forget the User

December 31, 2007

Author(s)

Mary F. Theofanos, Brian C. Stanton

The use of physical identifiable characteristics (biometrics) in border and transportation security has increased since 9/11. Currently, the United States...

Dynamically Programmable Digital Tissue Phantoms

December 31, 2007

Author(s)

Steven W. Brown, Joseph P. Rice, David W. Allen, Maritoni A. Litorja, Karel Zuzak, Edward Livingston

As optical imaging modalities gain acceptance for medical diagnostics and become common in clinical applications, standardized protocols to quantitatively...

Detection of Interstellar Cyanoformaldehyde (CNCHO)

December 31, 2007

Author(s)

Francis J. Lovas, Anthony J. Remijan, Jan M. Hollis, Wilmer D. Stork, Phil R. Jewell, D Meier

Cyanoformaldehyde (CNCHO) has been detected toward the star-forming region Sagittarius B2(N) with the 100 m Green Bank Telescope (GBT) by means of four P-branch...

Reducing the Radiological and Nuclear ThreaStandards for Radiation and Nuclear Detection

December 31, 2007

Author(s)

Lisa R. Karam

A multi-year effort to develop standards for radiation and nuclear detection for homeland security, begun in early 2002, has led to a comprehensive support...

Developments in nano-oscillators based upon spin-transfer point-contact devices

December 31, 2007

Author(s)

Thomas J. Silva, William H. Rippard

We review the current status of research on microwave nano-oscillators that utilize spin transfer devices with point-contact geometry, with an emphasis on the...

Integrating Learning Into a Hierarchical Vehicle Control System

December 31, 2007

Author(s)

James S. Albus, Roger V. Bostelman, Tsai H. Hong, Tommy Chang, William P. Shackleford, Michael O. Shneier

The National Institute of Standards and Technology s (NIST) Intelligent Systems Division (ISD) is a participant in the Defense Advanced Research Projects Agency...

Spin-exchange Optical Pumping of 3He with Rb/K Mixtures and Pure K

December 31, 2007

Author(s)

Wangchun Chen, Thomas R. Gentile, S E. Babcock, T G. Walker

We have studied the efficiency of spin-exchange optical pumping (SEOP) in cells that contain either pure rubidium, mixtures of rubidium and potassium, or pure...

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