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Search Publications

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Displaying 3476 - 3500 of 7109

New Connections for Enhancing Robustness of Precast Concrete Frame Structures

February 24, 2018
Author(s)
Travis E. Thonstad, Yihai Bao, Jonathan M. Weigand, Joseph A. Main, Hai S. Lew
A recent experimental and computational study of two precast concrete moment-frame assemblies under a column removal scenario revealed vulnerabilities in the moment connections arising from (a) local bending of reinforcing bars due eccentricity in the

Preface to Dislocatrions 2000 Proceedings

October 16, 2008
Author(s)
Lyle E. Levine, L -. Kubin, R -. Becker
During the 1950's and 1960's, a widespread international effort was underway to lay the foundations for a fundamental, dislocations-based understanding of plastic deformation and strain hardening. This effort lagged, however, as the existing theoretical

Optical Linewidth Models: Then and Now

June 1, 1999
Author(s)
Robert D. Larrabee, Richard M. Silver, M P. Davidson
In the late 1970's, Dr. Diana Nyyssonen demonstrated that NIST could optically calibrate photomask linewidth standards that were narrower than the classical resolution limit of a conventional bright-field microscope. She equated the known position of the

Causal Characteristic Impedance of Planar Transmission Lines

May 1, 2003
Author(s)
Dylan F. Williams, Bradley K. Alpert, Uwe Arz, Hartmut Grabinski
Abstract: We compute power-voltage, power-current, and causal definitions of the characteristic impedance of microstrip and coplanar-waveguide transmission lines on insulating and conducting silicon substrates, and compare to measurement.

Artificial intelligence for search and discovery of quantum materials

October 13, 2021
Author(s)
Aaron Kusne, Takeuchi Ichiro, Valentin Stanev, Johnpierre Paglione
Artificial intelligence and machine learning are becoming indispensable tools in many areas of physics, including astrophysics, particle physics, and climate science. In the arena of quantum materials, the rise of new experimental and computational

Users Guide to the HVACSIM+ Configuration Tool

September 2, 2020
Author(s)
Michael A. Galler
HVACSIM+ (HVAC SIMulation PLUS other systems) was introduced by the National Institute of Standards and Technology (NIST) in 1985 as a computer simulation tool to simulate building systems. The HVACSIM+ computer program package and manuals have been

Overshoot Mitigation Using the Reference Governor Framework

January 12, 2020
Author(s)
DJ Anand, Hamid Ossareh, Collin Freiheit
This paper presents a novel reference governor scheme for overshoot mitigation in a tracking control system. Our proposed scheme, referred to as the Reference Governor with DynamicConstraint (RG-DC), recasts the overshoot mitigation problem as a constraint

Modeling Core-Hole Screening in Core-Excitation Spectroscopies

October 16, 2008
Author(s)
Eric L. Shirley, J A. Soininen, J J. Rehr
We consider screening of the core-hole potential experienced by the ejected electron in core-excitation processes. This potential affects near-edge structure strongly, but it appears difficult to consistently obtain reliable screened core-hole potentials

Software Architecture of Virtual Environment for Nano Scale Assembly (VENSA)

August 1, 2003
Author(s)
Kevin W. Lyons, Yung-Tsun T. Lee
Virtual Environment (VE) uses various computer-generated media to let a user experience situations that are temporally and spatially prohibiting. The information flow between the user and the VE is bi-directional. The user can influence the environment

Toward Next-Generation Construction Machines

March 4, 2001
Author(s)
Roger V. Bostelman, James S. Albus, William C. Stone
Construction equipment is typically massive and operated manually with minimal use of sensors or computers for measurement or control. Research in the Intelligent Systems and Structures Divisions at the National Institute of Standards and Technology has

Criteria Analysis

October 1, 1999
Author(s)
Neil Christopher, Jim G. Nell
This document describes a research project to recommend a decision tool that the Manufacturing Systems Integration Division (MSID) could use during its strategic-planning process to evaluate which standards activities to support. This paper describes the

4-D/RCS Reference Model Architecture for Unmanned Ground Vehicles

April 1, 1999
Author(s)
James S. Albus
4-D/RCS is the reference model architecture currently being developed for the Demo III Experimental Unmanned Vehicle program. 4-D/RCS integrates the NIST (National Institute of Standards and Technology) RCS (Real-time Control System) with the German

On Feedback Functions of Maximum Length Nonlinear Feedback Shift Registers

August 2, 2010
Author(s)
Cagdas Calik, Meltem Sonmez Turan, Ferruh Ozbudak
Feedback shift registers are basic building blocks for many cryptographic primitives. Due to the insecurities of Linear Feedback Shift Register (LFSR) based systems, the use of Nonlinear Feedback Shift Registers (NFSRs) became more popular. In this work
Displaying 3476 - 3500 of 7109
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