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Displaying 4201 - 4225 of 7112

A portable cold 87Rb atomic clock with frequency instability at one day in the 10 -15 range

May 21, 2018
Author(s)
Joshua J. Savory, F G. Ascarrunz, L I. Ascarrunz, Alessandro L. Banducci, M C. Delgado Aramburo, Y Dudin, Steven R. Jefferts
We present a small portable cold 87Rubidium atomic clock with frequency uncertainty of less than 𝟑 × 𝟏𝟎 −𝟏𝟓 in one day of averaging time. The clock is under development at SpectraDynamics for the Defense Advanced Research Projects Agency (DARPA) Portable

Defeating Buffer Overflow: One of the Most Trivial and Dangerous Bugs of All!

October 31, 2016
Author(s)
Paul E. Black, Irena Bojanova
The C programming language was invented over 40 years ago. It is infamous for buffer overflows. We have learned a lot about computer science, language design, and software engineering since then. As it is unlikely that we will stop using C any time soon

256-Channel Magnetic Imaging System

January 18, 2008
Author(s)
Fabio C. da Silva, Sean Halloran, Anthony B. Kos, David P. Pappas
We present the design and fabrication of a magentoresistive imaging system capable of measuring 256 channels simultaneously along linear ranges of 4 mm and 13 mm. The channels are interfaced by custom electronics and the images are displayed in real time

256-channel magnetic imaging system

January 15, 2008
Author(s)
Fabio C. Da Silva, Sean Halloran, Anthony B. Kos, David P. Pappas
We present the design and fabrication of a magnetoresistive imaging system capable of scanning 256 channels simultaneously along linear ranges of either 4 or 13 mm. High speed electronics read the channels and transfer the data to a computer that builds

Portable X-Ray Systems for Use in Bomb Identification and Interdiction

December 1, 2007
Author(s)
Nicholas G. Paulter Jr.
The NIJ Standard for Portable X-Ray Systems is a minimum performance standard as applied to the man-portable battery-powered x-ray systems for use by bomb technicians and investigators. These systems comprise the x-ray generator, the image acquisition

A Welding Data Dictionary

March 31, 2004
Author(s)
William G. Rippey
This data dictionary specifies data elements that are used to describe the design, fabrication and inspection of weldments. It comprises welding information from several authoritative sources. Data include description of component materials, details of

Colloids Reinforce Glass Theory

April 1, 2000
Author(s)
S C. Glotzer
Nobel laureate Phil Anderson wrote in Science in 1995 that the glass transition remains the deepest and most important unsolved problem in solid state physics. Why all the mystery surrounding the seemingly simple solidification of a liquid into a

Coherent Quantum State Manipulation of Trapped Atomic Ions

January 1, 1998
Author(s)
David J. Wineland, C Monroe, D M. Meekhof, B E. King, Dietrich G. Leibfried, Wayne M. Itano, James C. Bergquist, D J. Berkeland, John J. Bollinger, J D. Miller
A single, laser-cooled, trapped 9Be+ ion is used to investigate methods of coherent quantum-state synthesis. We create and characterize nonclassical states of motion including "Schrödinger- cat" states. A fundamental quantum logic gate is realized using

Network-Centric CAD: A Research Planning Workshop

December 1, 1997
Author(s)
Simon Szykman, William Regli
These proceedings are a summary of Network-Centric CAD: A Research Planning Workshop, held on 3-4 December 1996 at the National Institute of standards and Technology in Gaithersburg, Maryland. The workshop was sponsored by Carnegie Mellon University, NIST

Benchmark for the Verification of Microwave CAD Software

December 1, 1991
Author(s)
R. Furlow, R. Y. Shimoda, Dylan Williams, Roger Marks, Kuldip Gupta
A set of microstrip structures which constitute a comprehensive benchmark for the verification of microwave Computer Aided Design (CAD) software has been developed in a collaborative effort. The benchmark is designed to exhibit a wide range of physical

Accidents and Disasters: Vulnerability in the Built Environment

August 1, 1991
Author(s)
J D. Sime
A first order model and computer program implementing previously developed procedures for estimating the speed, depth, and temperature of a fire produced gravity wave front in a corridor have been developed. The program has been incorporated into FPETOOL

AMRF Network Communications

January 1, 1988
Author(s)
Siefried Rybczynski, Edward J. Barkmeyer Jr., Evan K. Wallace, M Strawbridge, Donald E. Libes, C Young
This document describes the National Bureau of Standards (NBS) Automated Manufacturing Research Facility (AMRF) factory network architecture as implemented 1985 through 1987. Although changes in equipment have been made since 1986, the network architecture

Atomistic Origins of Conductance Switching in an e-Cu0.9V2O5 Neuromorphic Single Crystal Oscillator

December 4, 2024
Author(s)
Cherno Jaye, Conan Weiland, Daniel Fischer, John Ponis, Nicholas Jerla, George Agbeworvi, Saul Perez-Beltran, Nitin Kumar, Kenna Ashen, Jialu Li, Edrick Wang, Michelle A. Smeaton, Fatme Jardali, Sarbajeet Chakraborty, Patrick J. Shamberger, Katherine L. Jungjohann, Lu Ma, Jinghua Guo, G Sambandamurthy, Xiaofeng Qian, Sarbajit Banerjee
… Metal-insulator transitions, Memrestive, Neuromorphic computing, XRD, HAXPES, XANES, EXAFS, RIXS, EDX, TEM …

Automated interpretation of firearm mark comparison results

December 13, 2023
Author(s)
Martin Baiker-Sorensen, Ivo Alberink, Laura Granell, Leen van der Ham, Erwin J.A.T. Mattijssen, Erich Smith, Johannes A. Soons, Peter Vergeer, Xiaoyu Alan Zheng
In this article an automated approach for interpretation of firearm mark comparison results is presented. First, similarity scores are derived for marks typically encountered on primers of fired cartridge cases: aperture shear striations as well as

Understanding How Ligand Functionalization Influences CO 2 and N 2 Adsorption in a Sodalite Metal-Organic Framework

February 25, 2020
Author(s)
Mehrdad Asgari, Rocio Semino, Pascal A. Schouwink, Ilia Kochetygov, Jacob D. Tarver, Olga Trukhina, Rajamani Krishna, Craig Brown, Michele Ceriotti, Wendy L. Queen
In this work, a detailed study is conducted to understand how ligand substitution influences the CO 2 and N 2 adsorption properties of two highly crystalline sodalite MOFs known as Cu-BTT (BTT -3= 1,3,5-benzenetristetrazolate) and Cu-BTTri (BTTri -3 = 1,3

Design, Manufacturing, and Inspection Data for a Three-Component Assembly

February 12, 2019
Author(s)
Thomas D. Hedberg, Michael E. Sharp, Toby M. Maw, Mostafizur M. Rahman, Swati Jadhav, James J. Whicker, Allison Barnard Feeney, Moneer M. Helu
To better understand and address the challenges faced in linking all stages of a manufacturing and design process, an investigative fabrication process was designed and enacted as part of a collaboration between the National Institute of Standards and

A Critical Appraisal of Community Resilience Studies: Progress and Challenges

January 8, 2018
Author(s)
Maria Koliou, John W. van de Lindt, Bruce Ellingwood, Maria Dillard, Harvey Cutler, Therese P. McAllister
Community resilience, which has been defined as the ability to prepare for and recover from disruptive hazard events, has been addressed across multiple disciplines including environmental sciences, engineering, sociology, psychology and economics

Guidance on the TDEA Block Ciphers

November 27, 2017
Author(s)
Elaine B. Barker, Larry Feldman, Gregory A. Witte
This bulletin summarizes the information found in NIST SP 800-67, Rev. 2, Recommendation for the Triple Data Encryption Algorithm (TDEA) Block Cipher. This bulletin offers an overview of the TDEA block cipher along with usage guidance and NIST’s plans.
Displaying 4201 - 4225 of 7112
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