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Search Publications

NIST Authors in Bold

Displaying 4401 - 4425 of 7112

Prototype FDMS Database for Model Verification (NISTIR 6030)

June 1, 1997
Author(s)
Rebecca W. Portier, Richard Peacock, Walter W. Jones
Fire Data Management System, FDMS, is a system designed to store and retrieve fire test results obtained from bench-scale and real-scale tests as well as fire simulation programs. By storing available fire test values in a common format, this data is

GPS Aided Retrotraverse For Unmanned Ground Vehicles

April 1, 1996
Author(s)
Karl Murphy, Steven Legowik
A computer controlled HMMWV automatically retraces a previously recorded path using navigation data, a process we have termed retrotraverse. A Kalman filter combines the output of two navigation systems, an inertial dead reckoning system and a differential

Oscillatory Exchange Coupling in Fe/Cr Multilayers

January 1, 1996
Author(s)
Mark D. Stiles
First-principles calculations of the reflection probabilities for Fermi surface electrons at Cr/Fe interfaces are used to compute the strength of the oscillatory exchange coupling in Cr/Fe multilayers. These calculations show that critical spanning vectors

Resolved-Sideband Raman Cooling of a Bound Atom to the 3D Zero-Point Energy

January 1, 1995
Author(s)
C Monroe, D M. Meekhof, B E. King, Steven R. Jefferts, Wayne M. Itano, David J. Wineland, P Gould
We report laser cooling of a single 9Be+ ion held in a rf (Paul) ion trap to where it occupies the quantum-mechanical ground state of motion. With the use of resolved-sideband stimulated Raman cooling, the zero point of motion is achieved 98% of the time

Experimental Study of the Optical Properties of Soot and Smoke (NISTIR 5499)

September 1, 1994
Author(s)
M Y. Choi, George W. Mulholland, Anthony Hamins, Takashi Kashiwagi
The accurate measurement of flame-generated particlates is a problem of current interest to researchers in the fire and combustion community. Within the flame, the soot concentration measurement is central to the study of soot growth and for radiant

Measuring the Common Vulnerability Scoring System Base Score Equation

November 15, 2022
Author(s)
Peter Mell, Jonathan Spring, Dave Dugal, Srividya Ananthakrishna, Francesco Casotto, Troy Fridley, Christopher Ganas, Arkadeep Kundu, Phillip Nordwall, Vijayamurugan Pushpanathan, Daniel Sommerfeld, Matt Tesauro, Christopher Turner
This work evaluates the validity of the Common Vulnerability Scoring System (CVSS) Version 3 ''base score'' equation in capturing the expert opinion of its maintainers. CVSS is a widely used industry standard for rating the severity of information

Comparison of 2-D and 3-D shape analysis of concrete aggregate fines from VSI crushing

March 1, 2017
Author(s)
Edward J. Garboczi, Kenneth A. Snyder, Rolands Cepuritis, Stefan Jacobsen
The shape of concrete aggregate fines, with particle sizes between 3 µm and 250 µm, produced by high-speed vertical shaft impact (VSI) crushing of 10 different rock types from quarries in Norway, has been studied by both dynamic image analysis (DIA), which

High Fidelity Universal Gate Set for 9Be+ Ion Qubits

August 4, 2016
Author(s)
John P. Gaebler, Ting R. Tan, Yong Wan, Yiheng Lin, Ryan S. Bowler, Adam C. Keith, Scott Glancy, Kevin Coakley, Emanuel Knill, Dietrich Leibfried, David J. Wineland
We report high-fidelity laser-beam-induced quantum logic gates on qubits comprised of hyperfine states in 9Be+ ions, achieved in part through a combination of improved laser beam quality and control and improved state preparation. We demonstrate single

Scalable arrays of doped silicon RF Paul traps

October 26, 2009
Author(s)
Joseph W. Britton, Dietrich G. Leibfried, James A. Beall, Brad R. Blakestad, Janus H. Wesenberg, David J. Wineland
We report techniques for the fabrication of multi-zone linear RF Paul traps which exploit the machinability and electrical conductivity of bulk doped silicon. The approach was verified by trapping and Doppler cooling 24Mg+ ions in two trap geometries: a

Future of Fire Simulation

December 1, 2002
Author(s)
Kevin B. McGrattan, Howard R. Baum, Ronald G. Rehm, Glenn P. Forney, Kuldeep R. Prasad
Scientists and engineers are often asked to make predictions of the state of technology in the future and are usually laughably wrong. The best prognosticators get the trends right, but cannot possibly fill in the details. Think of Jules Verne predicting a

Future of Fire Investigation

October 1, 2000
Author(s)
Daniel M. Madrzykowski
As the legal climate for arson and fire investigations becomes more demanding, their need for a rigorous scientific foundation is growing. Fortunately, federal research efforts are already starting to close the gap.

Supporting Relationships in Access Control Using Role Based Access Control

October 29, 1999
Author(s)
John Barkley, Konstantin Benznosov, Jinny Uppal
The Role Based Access Control (RBAC) model and mechanism have proven to be useful and effective. This is clear from the many RBAC implementations in commercial products. However, there are many common examples where access decisions must include other

Summary of the Structural Performance of Single-Family, Wood-Frame Housing

September 1, 1998
Author(s)
Charles W. Yancey, Geraldine Cheok, Fahim H. Sadek, B Mohraz
A review of the structural performance of single-family, wood-frame houses is presented. The performance of these structures in selected earthquakes and hurricanes is summarized. In general, wood-frame houses performed well with relatively few instances of

Brand Lofting Above Large-Scale Fires.

August 3, 1997
Author(s)
J P. Woycheese, P J. Pagni, D Liepmann
Although lofting of burning brands in forest fires has received considerable attention, little research has quantified the transport of brands from burning structures. This mechanism of fire spread is of particular importance in post-earthquake and urban
Displaying 4401 - 4425 of 7112
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