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 1526 - 1550 of 1947

A Probabilistic Network Forensics Model for Evidence Analysis

September 20, 2016
Author(s)
Changwei Liu, Anoop Singhal, Duminda Wijesekera
Modern-day attackers tend to use sophisticated multi-stage/multi-host attack techniques and anti-forensics tools to cover their attack traces. Due to the current limitations of intrusion detection and forensic analysis tools, reconstructing attack

Thermodynamic Properties of 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone: Vapor Pressure, (p, ?, T) Behavior, and Speed of Sound Measurements, and Equation of State

September 30, 2015
Author(s)
Mark O. McLinden, Richard A. Perkins, Eric W. Lemmon, Tara J. Fortin
We report comprehensive thermodynamic property measurements of 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone. The p–ρ–T behavior was measured from T = (225 to 470) K with pressures up to 36 MPa using a two-sinker densimeter. These

Reevaluation of Neutron Flux Characterization Parameters for NIST RT-2 Facility

December 31, 2014
Author(s)
Dagistan Sahin, Vladimir Radulovic, Richard M. Lindstrom, Andrej Trkov
It has been difficult to characterize the thermal to epithermal neutron flux ratio (f) and the measure of the nonideal epithermal neutron flux distribution (α) for the RT-2 pneumatic rabbit facility at the NIST National Bureau of Standards Reactor (NBSR)

The Habitable-Zone Planet Finder: A Stabilized Fiber-Fed NIR Spectrograph for the Hobby-Eberly Telescope

September 24, 2012
Author(s)
Scott A. Diddams, Suvrath Mahadevan, Lawrence W. Ramsey, Chad F. Bender, Ryan Terrien, Jason T. Wright, Samuel Halverson, Fred Hearty, Matthew Nelson, Adam Burton, Stephen L. Redman, Steve Osterman, James Kasting, Michael Endl
We present the scientific motivation and conceptual design for the recently funded Habitable-zone Planet Finder (HPF), a stabilized fiber-fed near-infrared (NIR) spectrograph for the 10 meter class Hobby-Eberly Telescope(HET) that will be capable of

Information Retrieval on the Blogosphere

July 30, 2012
Author(s)
Ian M. Soboroff, Rodrygo Santos, Craig Macdonald, Richard McCreadie, Iadh Ounis
Blogs have recently emerged as a new open, rapidly evolving and reac- tive publishing medium on the Web. Rather than managed by a central entity, the content on the blogosphere—the collection of all blogs on the Web—is produced by millions of independent

Quasi-elastic Neutron Scattering Studies on Dynamics of Water Confined in Nanoporous Copper Rubeanate Hydrates

October 14, 2011
Author(s)
Takeshi Yamada, Ryo Yonaimine, Teppei Yamada, Hiroshi Kitagawa, Madhu Sudan Tyagi, Michihiro Nagao, Osamu Yamamuro
We have investigated the mechanism of the first order transition and proton conductivity in copper rubeanate hydrates from microscopic and dynamical points of view. Three different types of neutron spectrometer, time of flight, back scattering and neutron

The ABCs oF Standards Activities

August 23, 2009
Author(s)
Maureen A. Breitenberg
This report is an introduction to standardization and the U.S. standards system for readers that are not familiar with this topic. It highlights some of the more important aspects of this field; furnishes the reader with both historical and current

Comprehensive Evaluation of AIMS Texture, Angularity, and Dimension Measurements

July 3, 2009
Author(s)
Enad M. Mahmoud, Leslie L. Gates, Eyad A. Masad, Sinan T. Erdogan, Edward Garboczi
Aggregates are the most widely used construction materials in the world in structures built from both asphaltic and portland cement concrete composites. The performance of these composites is affected by aggregate shape characteristics (e.g., angularity

Micrometer-width damascene copper conductors at e10 MA/cm2

January 1, 2009
Author(s)
David T. Read, Roy H. Geiss
We have applied high amplitude (~10 MA/cm2) alternating current (AC) at 100 Hz and direct current (DC) to copper interconnect lines with widths in the few-micrometer range covered with a thick layer of SiO2. Under our test conditions of Joule heating, the

Dosimetry of Beta-Ray Opthalmic Applicators: Comparison of Different Measurement Methods

October 16, 2008
Author(s)
Christopher G. Soares, S Vynckier, H Jarvinen, W G. Cross, J Hokkanen, P Sipila, D Fluhs, B Schaeken, F A. Mourtada, G A. Bass, T T. Williams
An international intercomparison of the dosimetry of three beta particle emitting ophthalmic applicators was performed, which involved measurements with radiochromic film, thermoluminescence dosimeters (TLDs), alanine pellets, plastic scintillators, an

Infrared Spectrum and Revised Energy Levels for Neutral Krypton

October 16, 2008
Author(s)
Craig J. Sansonetti, Marion Greene
We observed the spectrum of neutral krypton (Kr I) in its naturally occurring isotopic mixture as emitted by a microwave-excited electrodeless discharge lamp with the National Institute of Standards and Technology 2-m Fourier transform spectrometer. The

Surfaces Formed by Subcritical Crack Growth in Silicate Glasses

October 16, 2008
Author(s)
J -. Guin, Sheldon M. Wiederhorn
The topology of surfaces formed by subcritical crack growth was investigated by the method of mapping using atomic force microscopy. The objective of the study was to determine how well the upper and lower surfaces matched after they have been formed by a

Liposome-Templated Supramolecular Assembly of Responsive Alginate Nanogels

March 14, 2008
Author(s)
Jennifer S. Hong, Wyatt N. Vreeland, Silvia H. De Paoli Lacerda, Laurie E. Locascio, Michael Gaitan, Srinivasa R. Raghavan
Nanosized gel particles (nanogels) are of interest for a variety of applications, including controlled release of drugs and single-molecule encapsulation. Here, we employ the cores of nanoscale liposomes as reaction vessels to template the assembly of

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 assess optical sensor performance are required to ensure commonality in measurements and to validate

Computer Security Division 2006 Annual Report

March 21, 2007
Author(s)
Tanya L. Brewer, Kevin M. Stine
This report covers the work conducted within the National Institute of Standards and Technology's Computer Security Division during the Fiscal Year 2006. It discusses all projects and programs within the Division, staff highlights, and publications. For

Computer Security Division 2005 Annual Report

February 1, 2006
Author(s)
Tanya L. Brewer, Matthew A. Scholl
This report covers the work conducted within the National Institute of Standards and Technology's Computer Security Division during the Fiscal Year 2005. It discusses all projects and programs within the Division, staff highlights, and publications. For

Computer Security Division 2004 Annual Report

August 1, 2005
Author(s)
Tanya L. Brewer
This report covers the work conducted within the National Institute of Standards and Technology's Computer Security Division during Fiscal Year 2004. It discusses all projects and programs within the Division, staff highlights, and publications. For many

Critical-Current Measurements on ITER Nb3Sn Strands: Effect of Temperature

July 29, 2005
Author(s)
Loren F. Goodrich, Najib Cheggour, John (Jack) W. Ekin, Theodore C. Stauffer
Transport critical-current (II c) measurements were made on commercial multifilamentary Nb 3Sn strands at temperatures (T) from 4 to 17 K and magnetic fields (H) from 0 to 14 T. Samples investigated were taken from the stage 1 pre-production strand for the
Displaying 1526 - 1550 of 1947
Was this page helpful?