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Displaying 5601 - 5625 of 7113

Graphical User Interfaces

July 5, 1999

Author(s)

Jean C. Scholtz

This chapter on graphical user interfaces gives the reader the history of interfaces of this type and some evidence from user studies about the usefulness of graphical interfaces. The different types of architectures used in applications with graphical

Image Sharpness Measurement in Scanning Electron Microscope - Part III

July 1, 1999

Author(s)

Samuel N. Jones, Robert D. Larrabee, Michael T. Postek, Andras Vladar, Nien F. Zhang

Fully automated or semi-automated scanning electron microscopes (SEM) are now commonly used in semiconductor production and other forms of manufacturing. Testing and proving that the instrument is performing at a satisfactory level of sharpness is an

A Virtual Assembly Design Environment

March 13, 1999

Author(s)

Sankar Jayaram, Yong Wang, Uma Jayaram, Kevin W. Lyons, Peter F. Hart

The Virtual Assembly Design Environment (VADE) is a Virtual Reality (VR) based engineering application which allows engineers to evaluate, analyze, and plan the assembly of mechanical systems. This system focuses on utilizing an immersive virtual

Planar Laser-Induced Fluorescence of CF 2 in O 2 /CF 4 and O 2 /C 2 F 6 Chamber-Cleaning Plasmas: Spatial Uniformity and Comparison to Electrical Measurements

March 1, 1999

Author(s)

Kristen L. Steffens, Mark A. Sobolewski

Planar laser-induced fluorescence (PLIF) measurements were made to determine two-dimensional spatial maps of CF 2 density as an indicator of chemical uniformity in 92% CF 4/O 2 and 50% C 2F 6/O 2 chamber-cleansing plasmas at pressures between 13.3 Pa (100

The Performance of Transit Time Flowmeters in Heated Gas Mixtures

June 1, 1998

Author(s)

John D. Wright

An ultrasonic transit time flowmeter was tested over Reynolds numbers from 1000 to 100,000 in a calibration facility that generates gas flows with controlled temperature and composition. The gas mixtures were composed of air, nitrogen, carbon dioxide

A Hybrid Manufacturing System Modeling Environment Using VRML

January 1, 1998

Author(s)

R K. Krishnamurthy, Charles R. McLean, J Shewchuk

… be considered simultaneously. However, no single tool or computing environment currently exists that allows this to be …

Algorithm for Calculating the Plume Center Line Temperature and Ceiling Jet Temperature in the Presence of a Hot Upper Layer

August 10, 1997

Author(s)

William D. Davis, Kathy A. Notarianni

The analysis of recent experiments (NIST TN 1423) using JP-5 and JP-8 pool fires performed in 15 m and 22 m high hangars suggest that plume center line temperature correlations found in the computer fire model FPETool (NISTIR 5486-1) under predict the

Design of Extended Range EVA PLSS Systems: Lessons From Terrestrial Exploration Missions

May 8, 1997

Author(s)

William C. Stone

As plans progress for construction and maintenance of the international space station and, more importantly, private missions to LEO and beyond become viable, serious thought will need to be given to re-engineering EVA (space suit) systems to achieve

Discussion of Statistical Issues in Geometric Feature Inspection Using Coordinate Measuring Machines

February 1, 1997

Author(s)

Steven D. Phillips, K Eberhardt

A coordinate measuring machine (CMM) is a computer controlled device that uses a probe to obtain measurements on a manufactured part''s surface, usually one point at a time. Probe movements may be programmed or determined manually by operation of a

An Analysis of AP213 for Usage as a Process Plan Exchange Format

January 1, 1997

Author(s)

Michael Iuliano, Albert W. Jones, Shaw C. Feng

The objective of the Computer-Aided Manufacturing Engineering (CAME) project is to identify generic interfaces which can be used to demonstrate the integration of manufacturing engineering software applications. A number of software tool kits are

Codification of Wind Loads on Buildings Using Bluff Body Aerodynamics and Climatological Data Bases.

January 1, 1997

Author(s)

Emil Simiu, T Stathopoulos

Current data storage and computational capabilities allow the development of a new generation of standards whose provisions on wind loads can be structured as knowledge-based systems drawing the requisite information from large data bases. We show several

Evaluation of an Injection Molding Process Model Using the Calculus of Imprecision to Simultaneously Specify Tolerances and Process Parameters

January 1, 1997

Author(s)

Ronald Giachetti

The strong interrelationship between part geometry, material properties, tolerances, and process parameters for injection molded parts hinders tolerance allocation and process specification. The traditional design process of first optimizing tolerances and

Simulating the Effects of HVAC Induced Air Flow From Slot Diffusers on Detector Response (NISTIR 5908)

December 1, 1996

Author(s)

J H. Klote, Glenn P. Forney, William D. Davis, Richard W. Bukowski

Rapid activation of fire protection systems in response to a growing fire is one of the important factors required to provide for life safety and property protection. Airflow due to the heating, ventilating and air conditioning (HVAC) system can

Device Driver Development for Microsoft Windows NT1: Accessing Motion Control Hardware Using a Multimedia Framework

October 1, 1996

Author(s)

Richard D. Schneeman

… the same category as other Microsoft Multimedia compliant computing peripherals such as sound, audio, video, and …

Simplified Design Procedure for Hybrid Precast Concrete Connections

February 1, 1996

Author(s)

Geraldine S. Cheok, William C. Stone, S. D. Nakaki

A rational design procedure is presented to compute the probable moment, the nominal moment, and the story drift capacities of a hybrid precast moment-resisting beam-to-column connection. The hybrid connections consist of mild steel which is used to

Evaluation of Sprinkler Activation Prediction Methods

March 15, 1995

Author(s)

Daniel M. Madrzykowski

The objective of this study was to evaluate the ability of sprinkler activation models to predict activation time. Large scale compartment fire tests were used to obtain activation times for four different types of sprinklers. The tests were conducted in

Toxicity Data for Fire Hazard Analysis

October 27, 1992

Author(s)

Richard G. Gann, Vyto Babrauskas, E Braun, Barbara C. Levin, M Paabo, Richard H. Harris Jr., Richard D. Peacock, S Yusa

A comprehansive methodology has been developed for obtaining and using smoke toxicity data for fire hazard analysis. The methodology comprises: determination that the post-flashover fire is the propert focus of smoke inhalation deaths; criteria for a

Vibrational and Electronic Energy Level of Polyatomic Transient Molecules. Supplement 1.

December 3, 1990

Author(s)

Marilyn E. Jacox

The database concerned with the vibrational and electronic energy of polyatomic transient molecules with from 3 to 16 atoms now contains the experimentallydetermined vibrational fundamentals and electronic band origins of approximately 2140 neutral and

Hierarchical Representation of Problem Solving Knowledge in a Frame-Based Process Planning System

December 1, 1986

Author(s)

D Nau, Tommy Chang

In most frame-based reasoning systems, the information being manipulated is represented using frames, but the problem-solving knowledge that manipulates the frames is represented as production rules. One problem with this approach is that rules are not

The AMRF Material Handling System Architecture

February 1, 1986

Author(s)

Charles R. McLean, Carl Wenger

A small batch manufacturing system testbed, the Automated Manufacturing Research Facility (AMRF), currently under construction at the National Bureau of Standards (NBS), is designed to support research in factory automation standards. This paper describes

A New Form for the Third-Order Asymptotic Aberration Coefficients of Electrostatic Lenses: Application to the Two-Tube Electrostatic Lens

January 1, 1975

Author(s)

D DiChio, S Natali, C Kuyatt

The third-order asymptotic aberration coefficients of round electrostatic lenses are reformulated in terms of the coordinates formed by the projections of the asymptotic incident and final rays onto the reference plane of the lens. In this formulation, all

Security and Trust Considerations for Digital Twin Technology Digital Twin Technology Considerations

February 14, 2025

Author(s)

Jeff Voas, Peter Mell, Phillip Laplante, Vartan Piroumian

Digital twin technology enables the creation of electronic representations of real-world entities and the ability to view the states and transitions between states of these entities. This report discusses the concept and purpose of digital twin technology

Damage Assessment on Magnetic Hard Disks Due to Nanoasperity Impacts at Head-Disk Interface

October 12, 2021

Author(s)

Tze-Jer Chuang, Stephen M. Hsu

A 3D finite element model is constructed to simulate the local impact and its aftermath.For a given design of the disk structure with known elastic/plastic and damage properties as well as the slider s design with its surface texture, the model predicts

NICE: Creating a Cybersecurity Workforce and Aware Public

June 4, 2012

Author(s)

Celia Paulsen, Ernest L. McDuffie, William D. Newhouse, Patricia R. Toth

The National Initiative for Cybersecurity Education (NICE) aims to create an operational, sustainable, and continually improving program for cybersecurity awareness, education, training, and workforce development. As part of the initiative, the NICE

Benefits and Costs of Research: A Case Study of the NIST High Performance Concrete Program

September 30, 2009

Author(s)

Jennifer F. Helgeson

This report provides an economic review of the National Institute of Standards and Technology High Performance Concrete (HYPERCON) Program from the period FY01 through FY09. The HYPERCON research program is designed to lower the cost of concrete

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