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Displaying 34201 - 34225 of 74175

A C-S-H Atomic-Scale Computational Toolkit: Application to Service Life Modeling

September 1, 2006
Author(s)
Kenneth A. Snyder, Raymond D. Mountain, Antonio Faraone
A computational toolkit is being developed for studying materials relevant to portland cement hydration. The toolkit will eventually include both a materials database and a collection of computational tools for constructing atomic-scale models, of both

A Study on Search Engine Use by Intelligence Analysts

September 1, 2006
Author(s)
Don E. Libes, Emile L. Morse, Jean C. Scholtz
This work reports on search engine use by intelligence analysts, generally considered experts at the task of searching for information. Intelligence analysts share a degree of common training and understanding while having widely differing backgrounds

Absorbed Dose to Water Calibration of Ionization Chambers in a 60 Co Gamma-Ray Beam

September 1, 2006
Author(s)
Ronaldo Minniti, J Shobe, Stephen M. Seltzer, Huaiyu H. Chen-Mayer, S R. Domen
Absorbed-dose-to-water calibrations are important to the medical community to facilitate the accurate determination of doses delivered to tumors during external-beam cancer therapy. The first version of this document offered an absorbed-dose-to-water

Applying NIST SP 800-53 to Industrial Control Systems

September 1, 2006
Author(s)
Stuart W. Katzke, Keith A. Stouffer, Marshall Abrams, David Norton, Joe Weiss
The National Institute of Standards and Technology (NIST) has established an Industrial Control System Security Project to improve the security of public and private sector Industrial Control Systems (ICSs). A major part of the project is to research the

Crack Tip Opening Angle: Measurement and Modeling of Fracture Resistance in Low and High Strength Pipeline Steels

September 1, 2006
Author(s)
Philippe P. Darcis, Joseph D. McColskey, Christopher N. McCowan, Thomas A. Siewert, Gabriel Kohn, Arry Bussiba, Richard J. Fields
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

Development and Evaluation of a Candidate Reference Measurement Procedure for the Determination of Progesterone in Human Serum Using Isotope-Dilution Liquid Chromatography-Tandem Mass Spectrometry

September 1, 2006
Author(s)
Susan S. Tai, Bei Xu, Michael J. Welch
Progesterone is a steroid hormone that is involved in regulating female reproductive processes. Its concentration in blood is measured to determine ovarian function. A candidate reference measurement procedure for progesterone in human serum involving

Development of NIST SRM 2881, an Absolute Molecular Mass Distribution Polymer Standard

September 1, 2006
Author(s)
William E. Wallace, Charles M. Guttman, Kathleen M. Flynn, Anthony J. Kearsley
We present a strategy to create an absolute molecular mass distribution polymer Standard Reference Material. To create a standard our methods must be free of operator bias (intentional or unintentional). The steps include sample preparation, instrument
Displaying 34201 - 34225 of 74175
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