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Search Publications

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Displaying 5826 - 5850 of 9857

Simulation-based Approaches to Studying Effectiveness of Moving-Target Network Defense

June 11, 2012
Author(s)
Rui Zhuang, Su Zhang, Scott DeLoach, Xinming Ou, Anoop Singhal
Moving-target defense has been hypothesized as a potential game changer in cyber defense, including that for computer networks. However there has been little work to study how much proactively changing a network's configuration can increase the difficulty

The Need for Behavioral Theory in Evacuation Modeling

February 1, 2010
Author(s)
Erica D. Kuligowski, Steve M. Gwynne
This paper posits the need for comprehensive theories about human behavior in fire evacuations. These would be of value in and of themselves to improve training, education, and future data collection efforts, but would also allow for a complete behavioral

Ab Initio Study of the Oxidation Reaction of CO by ClO Radicals

November 1, 2003
Author(s)
F Louis, Carlos A. Gonzalez, J P. Sawerysyn
The oxidation of carbon monoxide by ClO radicals was studied by ab initio molecular orbital theory calculations. Geometry optimizations and vibrational frequencies were computed using two methods: Moller-Plesset second-order perturbation theory (MP2), and

Elastic Constants of Natural Quartz

August 1, 2003
Author(s)
Paul R. Heyliger, H M. Ledbetter, Sudook A. Kim
We measured the elastic constants of a natural-quartz sphere using resonance-ultrasound spectroscopy (RUS). Our measurements of the near-traction-free vibrational frequencies of the sphere are matched with the predicted frequencies from the dynamic theory

A High-Speed Thermal Imaging System for Semiconductor Device Analysis

April 1, 2001
Author(s)
Allen R. Hefner Jr., David W. Berning, David L. Blackburn, Christophe C. Chapuy, Sebastien Bouche
A new high-speed transient thermal imaging system is presented that provides the capability to measure the transient temperature distributions on the surface of a silicon chip with 1 υs time, and 15 υm spatial resolution. The system uses virtual instrument

Influence of solidification structure on austenite to martensite transformation in additively manufactured hot-work tool steels

August 15, 2021
Author(s)
Chia-Ying Chou, Niklas H. Pettersson, Durga A, Fan Zhang, Christos Oikonomou, Annika Borgenstam, Joakim Odqvist, Greta Lindwall
The microstructure of a hot-work tool steel additively manufactured using laser powder-bed fusion (L-PBF), and its response to post heat treatment, is studied in detail by microstructure characterization and computational thermodynamics and kinetics. The

Staggered spin Hall conductivity

November 25, 2020
Author(s)
Fei Xue, Paul M. Haney
… with similar computational effort relative to computing the bulk spin Hall conductivity. We also present …

Rethinking Timekeeping for Modern IT Solutions

January 28, 2019
Author(s)
Son VoBa, Charles L. Ulland, Michael Lombardi, Arno Lentfer
… standard hardware interfaces to keep general-purpose computing platforms and their virtual machines UTC-accurate, …

Evaluating automatic face recognition systems with human benchmarks

April 9, 2015
Author(s)
P. Jonathon Phillips, Alice O'Toole
Human face recognition skills are often considered the gold standard against which machines must compete. Over the last two decades, however, international tests of computer-based face recognition algorithms have shown steady improvements in accuracy with

Virtual Testing of Concrete Transport Properties

October 1, 2009
Author(s)
Dale P. Bentz, Edward J. Garboczi, Nicos Martys, Kenneth A. Snyder, W. S. Guthrie, Konstantinos Kyritsis, Narayanan Neithalath
The transport properties of concrete are critical to its field performance. Commonly encountered degradation mechanisms are dependent on ionic diffusivity, sorptivity, and permeability. In this paper, virtual testing of two of these concrete transport

Industrial Need: Production Management Standards

August 1, 1997
Author(s)
Albert T. Jones, Charles R. McLean
… The High Performance Computing and Communications (HPCC) program was formally established by the High Performance Computing Acto of 1991 (Public Law 102-194). T The goal of …

Modeling Spiking Neurons without Spikes

August 2, 2024
Author(s)
Jeff Shainline, Bryce Primavera, Ryan O'Loughlin
… spiking neural network, neuromorphic computing, superconductors, photonics, superconducting …

User Perceptions and Experiences with Smart Home Updates

May 22, 2023
Author(s)
Julie Haney, Susanne M. Furman
Updates may be one of the few tools consumers have to mitigate security and privacy vulnerabilities in smart home devices. However, little research has been undertaken to understand users' perceptions and experiences with smart home updates. To address

A Data Structure for Integrity Protection with Erasure Capability

May 20, 2022
Author(s)
D. Richard Kuhn
This document describes a data structure, referred to as a data block matrix, that supports the ongoing addition of hash-linked records while also allowing for the deletion of arbitrary records, thereby preserving hash-based integrity assurance that other

Quick Start Guide for Populating Mobile Test Devices

May 10, 2018
Author(s)
Richard Ayers, Benjamin R. Livelsberger, Barbara Guttman
This guide provides procedures for documenting and populating various data elements typically found within the contents of a mobile device, e.g., mobile phone, tablet, etc. The guide discusses techniques and considerations for preparing the internal memory

An Introduction to Privacy Engineering and Risk Management in Federal Information Systems

January 5, 2017
Author(s)
Sean W. Brooks, Michael E. Garcia, Naomi B. Lefkovitz, Suzanne Lightman, Ellen M. Nadeau
This document provides an introduction to the concepts of privacy engineering and risk management for federal information systems. These concepts establish the basis for a common vocabulary to facilitate better understanding and communication of privacy

Self-Assembly of Trimer Colloids: Effect of shape and interaction range

April 5, 2016
Author(s)
Harold W. Hatch, Seung Y. Yang, Jeetain Mittal, Vincent K. Shen
Trimers with one attractive bead and two repulsive beads, similar to recently synthesized trimer patchy colloids, were simulated with flat-histogram Monte Carlo methods to obtain the stable self-assembled structures for different shapes and interaction

ITL Publishes Guidance on Preventing and Handling Malware Incidents

August 22, 2013
Author(s)
Elizabeth B. Lennon
This ITL Bulletin summarizes a new ITL publication, NIST Special Publication 800- 83 Revision 1,Guide to Malware Incident Prevention and Handling for Desktops and Laptops,which gives receommendations for organizations to improve their malware incident

Mechanisms of Cement Hydration

December 22, 2011
Author(s)
Jeffrey W. Bullard, Hamlin M. Jennings, Richard A. Livingston, Andre Nonat, George W. Scherer, Jeffrey S. Schweitzer, Karen L. Scrivener, Jeffrey J. Thomas
Several detailed reviews have been written about the kinetics of cement hydration . In this review, focus is placed on a number of recent advances in understanding the principal mechanisms that govern the rate of hydration and microstructure development

Alarm Information for Decision Support

November 4, 2010
Author(s)
William D. Davis, Adam M. Barowy, Stephen Kerber
Experiments conducted in a Toledo Ohio school are used to examine the use of signals from simulated heat detectors by incident command. Two approaches are examined. The first is to use the signal from ceiling mounted thermocouples to deduce conditions in
Displaying 5826 - 5850 of 9857
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