U.S. flag

An official website of the United States government

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.

Search Publications

NIST Authors in Bold

Displaying 31801 - 31825 of 73829

Technical Variation in Modeling the Joint Expression of Several Genes

October 25, 2007
Author(s)
Walter S. Liggett Jr
Biological studies based on expression microarrays often depend crucially on comparison of expression measurements that are subject to technical variation associated with changes in time, laboratory or other measurement conditions. If a biological study

The Common Vulnerability Scoring System (CVSS)

October 25, 2007
Author(s)
Shirley M. Radack
This bulletin summarizes the guidance developed by NIST and published in NISTIR 7435 to help IT managers to make sense of data about the vulnerabilities of their information systems and to take appropriate actions that will protect their systems and

Thermodynamics of Enzyme Catalyzed Reactions: Part 7 - 2007 Update

October 25, 2007
Author(s)
Robert N. Goldberg, Yadu D. Tewari, Talapady N. Bhat
This review serves to update previously published evaluations of equilibrium constants and enthalpy changes for enzyme catalyzed reactions. For each reaction the following information is given: the reference for the data; the reaction studied; the name of

Evaluating Entity-Based Sensemaking Tools for Intelligence Analysis

October 24, 2007
Author(s)
Eric Bier, Theresa O'Connell, Yee-Yin Choong, Christiaan Royer, Randy Gobbel
Intelligence analysts regularly face difficult tasks. Given many potentially relevant documents and facts, they must find the most relevant, organize them, and make sense of them. New software technologies are being developed to help. Given the complexity

Information Technology Laboratory Brochure

October 24, 2007
Author(s)
Elizabeth B. Lennon
This brochure describes the programs of the Information Technology Laboratory (ITL). Following a letter from the ITL Director, ITL's nine programs are described, and ITL's mission, core competencies, resources, products, and customers are given, followed

Mesoporous Silica Films with Long-Range Order Prepared from Strongly Segregated Block Copolymer/Homopolymer Blend Templates

October 24, 2007
Author(s)
Vijay Tirumala, R A. Pai, Sumit Agarwal, Curran Chandler, Gaurav Bhatnagar, Alvin Omang, Eric K. Lin, J J. Watkins
Well ordered mesoporous silica films were prepared by infusion and selective condensation of Si alkoxides within pre-organized block copolymer/homopolymer blend templates using supercritical CO2 as the delivery medium. The morphologies of mesoporous silica

Electron Impact Ionization of Metastable Rare Gases: He, Ne and Ar

October 23, 2007
Author(s)
M A. Ali, Philip M. Stone
Ionization cross sections by electron impact of atoms are important quantities needed for modeling of low temperature plasmas and gas discharges. Although experimental and theoretical studies of ionization of ground states of atoms have been extensive

Fatigue Crack Growth Rates in Pipeline Steels Using Curved M(T) Specimens

October 23, 2007
Author(s)
Philippe P. Darcis, John M. Treinen, Joseph D. McColskey
This study presents fatigue data for two different ferrite-pearlite pipeline steels. A fatigue crack growth test for full thickness curved pipeline samples was developed using a Middle Tension, M(T), type specimen. Also, FEA (Finite Element Analyses) were

The Molecular Origin of Enhanced Toughness in Double-Network Hydrogels

October 22, 2007
Author(s)
Taiki Tominaga, Vijay Tirumala, Eric K. Lin, Jian P. Gong, Hidemitsu Furukawa, Yoshihito Osada, Wen-Li Wu
The long-standing pursuit of a synthetic equivalent to tissue cartilage has seen significant new activity with the development of a new materials strategy: double-network hydrogels (DN-gels) prepared from a combination of an anionic polyelectrolyte and a

Dynamics of Confined Polymer Films Measured via Thermal Wrinkling

October 19, 2007
Author(s)
Kirt A. Page, Derek L. Patton, Rui Huang, Christopher Stafford
In the past several years there have been a number of advances in the understanding of the physics of polymer thin films. However, there still remains a wide range of opportunities to further this understanding through the development of measurement tools

An Automated Densimeter for the Rapid Characterization of Industrial Fluids

October 18, 2007
Author(s)
Stephanie L. Outcalt, Mark O. McLinden
An apparatus for the automated measurement of compressed liquid densities over the temperature range of 270 K to 470 K and pressures to 50 MPa is described. The heart of the apparatus is a commercial vibrating tube densimeter. In order to minimize the

Confinement, Entropy, and Single-Particle Dynamics of Equilibrium Hard-Sphere Mixtures

October 18, 2007
Author(s)
Jeetain Mittal, Vincent K. Shen, Jeffrey R. Errington, Thomas M. Truskett
We use discontinuous molecular dynamics and grand-canonical transition-matrix Monte Carlo simulations to explore how confinement between parallel hard walls modifies the relationships between packing fraction, self-diffusivity, partial molar excess entropy

Development of the Aerosol Particle Mass Analyzer

October 17, 2007
Author(s)
Nobuhiko Fukushima, Naoko Tajima, Kensei Ehara, Hiromu Sakurai, Kevin Coakley
The Aerosol Particle Mass Analyzer (APM), can classify particles according to their mass-to-charge ratio. The utility of the APM has been confirmed; the APM has been applied to atmospheric aerosol research and engine exhaust measurements. The operating

The State of Container Security Standards

October 17, 2007
Author(s)
Shaw C. Feng, Simon P. Frechette
As cargo container security is a critical component in the U.S. homeland security, the communication among people in a chain of custody of a container needs to be timely and effective. Since people in the container custody chain often use different

Crack Tip Opening Angle Optical Measurement Methods in Five Pipeline Steels

October 16, 2007
Author(s)
Philippe P. Darcis, Christopher N. McCowan, H. Windhoff, Joseph D. McColskey, Thomas A. Siewert
Crack tip opening angle (CTOA) is becoming one of the more widely accepted properties for characterizing fully plastic fracture. In fact, it has been recognized as a measure of the resistance of a material to fracture in cases where there is a large degree
Displaying 31801 - 31825 of 73829
Was this page helpful?