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.

Journals

Spectroscopic Characterization of Fluorescein- and Tetramethylrhodamine-Labeled Oligonucleotides and Their Complexes With a DNA Template

October 1, 2004

Author(s)

Lili Wang, Adolfas K. Gaigalas, J L. Blasic, Marcia J. Holden

We measured absorption and emission spectra, fluorescence quantum yield, anisotropy, fluorescence resonance energy transfer (FRET), and melting temperature to...

Shape Analysis of a Reference Cement

October 1, 2004

Author(s)

Edward J. Garboczi, Jeffrey W. Bullard

Recently, techniques for acquiring, analyzing, and using 3-D shape information for aggregates (sand, gravel) have been developed and demonstrated. These...

Estimation of the Degree of Hydration of Blended Cement Pastes by a Scanning Electron Microscope Point-Counting Procedure

October 1, 2004

Author(s)

X Feng, Edward J. Garboczi, Paul E. Stutzman, T Mason

A scanning electron microscope (SEM) point-counting technique was employed to study the hydration of plain portland cement pastes and blended cement pastes...

Monitoring the Macroscopic Effect of DDoS Flooding Attacks

October 1, 2004

Author(s)

Kevin L. Mills, J Yuan

USE OF LASER SCANNING CONFOCAL MICROSCOPY FOR QUANTITATIVE CHARACTERIZATION OF PHYSICAL CHANGES OF POLYMER COATINGS AFTER UV EXPOSURE

October 1, 2004

Author(s)

Li Piin Sung, J Jasmin, Xiaohong Gu, Tinh Nguyen, Jonathan W. Martin

Due to its non-destructive properties, laser scanning confocal microscopy (LSCM) has become a powerful tool for monitoring physical changes in polymeric...

A Closed System Digestion and Purification Procedure for the Accurate Assay of Chlorine in Fossil Fuels

October 1, 2004

Author(s)

M E. Howard, Robert D. Vocke Jr.

Application of the Josephson Effect to Metrology

October 1, 2004

Author(s)

Samuel P. Benz, Clark Hamilton

The unique ability of a Josephson junction to control the flow of magnetic flux quanta leads to a perfect relationship between frequency and voltage. Over the...

The Effect of Situation Awareness Acquisition in Determining the Ratio of Operators to Semi-Autonomous Driving Vehicles

October 1, 2004

Author(s)

Jean C. Scholtz

We used a technical readiness level assessment to obtain intervention time and the time to acquire situation awareness for different classifications of...

Cross-Organization Clinical Documents Sharing (XDS) Reference Implementation and Conformance Test Suite

October 1, 2004

Author(s)

William J. Majurski

The National Software Reference Library (NSRL) of the U.S. National Institute of Standards and Technology (NIST) collects software from various sources and...

Effects of Speech Recognition Accuracy on Performance of DARPA Communicator Spoken Dialogue Systems

October 1, 2004

Author(s)

Gregory A. Sanders, A N. Le

The DARPA Communicator program explored ways to construct better spoken-dialogue systems, with which users interact via speech alone to perform relatively...

Deconvolving LADAR Images Of Bar Codes for Construction Site Object Recognition

October 1, 2004

Author(s)

David E. Gilsinn, Dianne M. O'Leary

Elastic, Anelastic, Piezoelectric Coefficients of Monocrystal Lithium Niobate

October 1, 2004

Author(s)

H M. Ledbetter, H Ogi, N Nakamura

Using improved acoustic spectroscopy, we determined the complete above coefficients (16 independent ones) by measuring the macroscopic resonance frequencies of...

Fatigue and Damage Tolerance of Y-TZP Ceramics in Layered Biomechanical Systems

October 1, 2004

Author(s)

Yu Zhang, Antonia Pajares, Brian R. Lawn

The fatigue properties of fine-grain Y-TZP in cyclic flexural testing are studied. Comparative tests on a coarser-grain alumina provide a baseline control. A...

The Structural Steel of the World Trade Center Towers

October 1, 2004

Author(s)

Frank W. Gayle, Stephen W. Banovic, Timothy J. Foecke, Richard J. Fields, William E. Luecke, Joseph D. McColskey, Thomas A. Siewert, Christopher N. McCowan

In September 2002, the National Institute of Standards and Technology became the lead agency in an investigation of the World Trade Center (WTC) disaster of...

Tribochemistry Between Water and Si₃N₄ and SiC: Induction Time Analysis

October 1, 2004

Author(s)

Richard S. Gates, Stephen M. Hsu

Avanced ceramics are being considered as one of the potential materials for high temperature steam engines. Silicon nitride and silicon carbide have...

X-Ray Imaging with Ultra-Small-Angle X-Ray Scattering as a Contrast Mechanism

October 1, 2004

Author(s)

Lyle E. Levine, Gabrielle G. Long

A new transmission X-ray imaging technique based upon ultra-small-angle X-ray scattering (USAXS) is described. Images are formed from angle-filtered X-rays that...

Evaluation of Elastic Modulus and Hardness of Thin Films By Nanoindentation

October 1, 2004

Author(s)

Yeon-Gil G. Jung, Brian R. Lawn, M Martyniuk, H Huang, X Z. Hu

Simple equations are proposed for determining elastic modulus and hardness properties of thin films on substrates from nanoindentation experiments. The...

Water Lubrication of Silicon Nitride in Sliding

October 1, 2004

Author(s)

Said Jahanmir, Y Ozmen, L K. Ives

Diffraction Corrections in Radiometry: Spectral and Total Power and Asymptotic Properties

October 1, 2004

Author(s)

Eric L. Shirley

Effect of Morphology on the Response of Polyaniline-Based Conductometric Gas Sensors: Nanofibers vs. Thin Films

October 1, 2004

Author(s)

Guofeng Li, C Martinez, J Janata, J A. Smith, M Josowicz, Stephen Semancik

Mixtures of methanol with increasing fractions of formic acid were used to progressively transform the morphology of polyaniline starting from nanofibers to...

Horizontal Growth and In Situ Assembly of Oriented Zinc Oxide Nanowires

October 1, 2004

Author(s)

Babak Nikoobakht, Chris A. Michaels, Stephan J. Stranick, Mark D. Vaudin

The positioning and directed assembly of semiconductor nanowires (NWs) is of considerable current interest for bottom-up approaches to the engineering of...

UML 2 Composition Model

October 1, 2004

Author(s)

Conrad E. Bock

The composition model in the Unified Modeling Language, version 2, is a major upgrade to the familiar black diamond composition of earlier versions. It supports...

Efficient multi-wave mixing in ultra slow propagation regime and the role of multi-photon quantum destructive interference,

October 1, 2004

Author(s)

Y Wu, M G. Payne, Edward W. Hagley, Lu Deng

We analyze a lifetime-broadened four-state four-wave-mixing (FWM) scheme in the ultraslow propagation regime and show that the generated FWM field can acquire...

Probing the Origins and Control of Shrinkage Stress in Dental Resin-Composites: 1. Shrinkage Stress Characterization Technique

October 1, 2004

Author(s)

H Lu, J W. Stansbury, Sabine H. Dickens, F Eichmiller, Christopher N. Bowman

The accurate and reliable characterization of the polymerization shrinkage stress is becoming increasingly important, as shrinkage stresses developing during...

Modelling Polycrystalline Solidification Using Phase Field Theory

October 1, 2004

Author(s)

L Granasy, T Pusztai, James A. Warren

We review recent advances made in phase field modelling of polycrystalline solidification. Areas covered include the development of theory from early approaches...

Probing the Origins and Control of Shrinkage Stress in Dental Resin-Composites. II. Novel Methods of Simultaneous Measurement of Polymerization Shrinkage Stress and Conversion

October 1, 2004

Author(s)

H Lu, J W. Stansbury, Sabine H. Dickens, F Eichmiller, Christopher N. Bowman

In this study, we have probed the interrelationships between polymerization shrinkage stress development and the polymerization progress with a novel...

Multiinstantons and Exact Results: Specific Cases, Higher-Order Effects, and Numerical Calculations

October 1, 2004

Author(s)

Jean Zinn-Justin, U Jentschura

Comparative OHD-RIKES and THz-TDS Probes of Ultrafast Structural Dynamics in Molecular Liquids

October 1, 2004

Author(s)

M C. Beard, W T. Lotshaw, Timothy M. Korter, Edwin J. Heilweil, D McMorrow

We compare terahertz time-domain (THz-TDS) and optical heterodyne detected Raman-induced Kerr effect (OHD-RIKES) spectroscopic techniques as probes of molecular...

Study of a 1D Interacting Quantum Bose Gas

October 1, 2004

Author(s)

B Laburthe, K M. O'Hara, J H. Huckans, M Anderlini, James V. Porto, S L. Rolston, William D. Phillips

The loading of a Bose-Einstein condensate into a deep 2D optical lattice provides a unique way to study 1D Bose gases: the strong radial confinement freezes any...

Ground and First Excited Torsional States of Acetamide

October 1, 2004

Author(s)

Vadim V. Ilyushin, E A. Alekseev, S K. Dyubko, I Kleiner, Jon T. Hougen

Recent progress in measuring, assigning and fitting the millimeter wave spectrum of the ground, first and second excited torsional states of the acetamide...

Was this page helpful?