WorldCat Identities

NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD

Overview
Works: 276 works in 304 publications in 1 language and 310 library holdings
Genres: Conference papers and proceedings 
Classifications: QC100, 672.36
Publication Timeline
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Most widely held works by NATIONAL BUREAU OF STANDARDS GAITHERSBURG MD
Preliminary report on the thermodynamic properties of selected light-element and some related compounds : supplement to NBS reports 6297, 6484, 6645, 6928, 7093, 7192, 7437, 7587, 7796, 8033, 8186, 8504 and 8628 by United States( Book )

7 editions published between 1965 and 1969 in English and held by 7 WorldCat member libraries worldwide

This report presents in detail the methods, results, and interpretation of six recent NBS experimental investigations of thermodynamic and related properties. Measurements of the heats of reaction with hydrogen of chlorine trifluoride and its two free elements gave on preliminary calculation 38.61 kcal/mol, which agrees with two published values and disproves a formerly credited value that is 10 kcal/mol less exothermic. Precise measurements of the heat capacity of sintered beryllium oxide gave generally lower heat capacities and an appreciably lower entropy than previously accepted. A new millisecond apparatus for measuring simultaneously the heat capacity, electrical resistivity, and hemispherical total emittance of electrical conductors is described. Preliminary results are given for molybdenum (1800-2800 K). The reaction between beryllium metal and aluminum oxide was studied mass-spectrometrically (1511-1743 K). The resulting second-law and third-law heats of four reactions involving the gas species Be, Al, O, Al2O, and AlO are compared. From a continuation of the spectroscopic investigation of the alkali-hydroxide molecules, the high-temperature microwave spectra of RbOH and the matrix-isolation infrared spectra of RbOH and NaOH (plus the deuteroxides in all cases) were observed, and are analyzed to give bond lengths, frequency fundamentals, nuclear quadrupole coupling constants, and vibration-rotation interaction constants. The essentially linear shapes and unusual bending potentials of these molecules are very similar to those found earlier for CsOH, and suggest a similar behavior of all the alkali hydroxides. (Author)
Evaluation of tests for cermets as components of heat-resistant materials( Book )

5 editions published between 1952 and 1953 in English and held by 5 WorldCat member libraries worldwide

Transverse testing of cermet speciments has been given primary attention during this quarter. The modulus of elasticity in flexure was obtained by means of the Tuckeerman optical strain gage for all cermet speciments of every brand and form with the exception of form D. The bending apparatus, collimator, and Tuckerman assembly are described and illustrated in a previous report (1). THe specimen dimensions, loading span, and length of moment arm are given
Methods of measurement for semiconductor materials, process control, and devices. Quarterly report. July 1 - September 30, 1972 by W. Murray Bullis( Book )

4 editions published between 1971 and 1973 in English and held by 4 WorldCat member libraries worldwide

Significant accomplishments during this reporting period include design of a plan to provide standard silicon wafers for four-probe resistivity measurements for the industry, publication of a summary report on the photoconductive decay method for measuring carrier lifetime, publication of a comprehensive review of the field of wire bond fabrication and testing, and successful completion of organizational activity leading to the establishment of a new group on quality and hardness assurance in ASTM Committee F-1 on Electronics. Work is continuing on measurement of resistivity of semiconductor crystals; characterization of generation-recombination-trapping centers in silicon; study of gold-doped silicon; development of the infrared response technique; evaluation of wire bonds and die attachment; and measurement of thermal properties of semiconductor devices, delay time and related carrier transport properties in junction devices, and noise properties of microwave diodes. New efforts were initiated in both the die attachment and wire bond evaluation tasks. A description of breakdown tracks, a primary failure mode of monolithic integrated circuits stressed with voltage pulses, is given in a separate appendix. (Author Modfied Abstract)
Analysis of Free Electron Laser Performance Utilizing the National Bureau of Standards' CW Microtron( Book )

3 editions published between 1987 and 1988 in English and held by 3 WorldCat member libraries worldwide

The CW racetrack microtron (RTM) will be utilized as a driver for a free electron laser (FEL) oscillator. The TRM possesses many exceptional properties of value for the FEL: i) CW operation, ii) energy from 20-185 MeV, iii) small energy spread and emittance, iv) excellent energy stability, and v) high average power. The 1-D FEL gain formula predicts that the FEL would oscillate at the fundamental approximately from 0.25 to 10 micrometers when up-grading the peak current to> or = 2A. This paper presents 3-D self consistent numerical results including several realistic effects, such as emittance, betatron oscillations, diffraction and refraction. The results indicate that the design value of the transverse emittance is small enough that it does not degrade the FEL performance for intermediate to long wavelengths, and only slightly degrades the performance at the shortest wavelength under consideration. Due to the good emittance, the current density is high enough that focusing, or guiding, beings to manifest itself for wavelengths> 2.0 micrometers. Keywords: Continuous waves; Free electron lasers; Racetrack microtron. (JHD)
Heat treatment and properties of iron and steel by Samuel J Rosenberg( Book )

2 editions published in 1966 in English and held by 2 WorldCat member libraries worldwide

This monograph is a revision of the previous NBS Monograph 18. Its purpose is to provide an understanding of the heat treatment of iron and steels, principally to those unacquainted with this subject. The basic principles involved in the heat treatment of these materials are presented in simplified form. General heat treatment procedures are given for annealing, normalizing, hardening, tempering, case hardening, surface hardening, and special treatments such as austempering, ausforming, martempering and cold treatment. Chemical compositions, heat treatments, and some properties and uses are presented for structural steels, tool steels, stainless and heat-resisting steels, precipitation-hardenable stainless steels and nickel-maraging steels
A tabulation of the thermodynamic properties of normal hydrogen from low temperatures to 540 °R and from 10 to 1500 psia : supplement A (British units) by John W Dean( Book )

1 edition published in 1962 in English and held by 2 WorldCat member libraries worldwide

The Role of Behavioral Science in Physical Security: Proceedings of the Annual Symposium, May 2-4 1978( Book )

1 edition published in 1979 in English and held by 2 WorldCat member libraries worldwide

This document contains the proceedings of the third annual symposium on, 'The Role of Behavioral Science in Physical Security, ' held in May 1978. The symposium provided a forum for the exchange of information between specialists in physical security and behavioral science through the presentation of eight papers and four structural workshops: Human Sensory Capabilities/Limitations; Human Engineering of the Workplace; Human Motivation, Attitudes, Error/Reliability; Personnel Selection, Placement, Training. The symposium concluded with a summary and synthesis of the results of the workshops and a panel discussion on new research thrusts
Laser induced damage in optical materials: 1972; proceedings by United States( Book )

2 editions published between 1977 and 1978 in English and held by 2 WorldCat member libraries worldwide

The Tenth Annual Symposium on Optical Materials for High Power Lasers was divided into sessions concerning the Measurement of Absorption Characteristics, Bulk Material Properties, Mirrors and Surfaces, Thin Film Damage, Coating Materials and Design and Breakdown Phenomena. As in previous years, the emphasis of the papers presented at the Symposium was directed toward new frontiers and new developments. Particular emphasis was given to materials for use from 10.6 micrometers to the uv region. Highlights included surface characterization, thin film-substrate boundaries, and advances in fundamental laser-matter threshold interactions and mechanisms. The scaling of damage thresholds with pulse duration, focal area, and wavelength were also discussed
Evaluation of Tests for Non-Metallic Refractories as Components of Erosion-Resistant Materials( Book )

2 editions published between 1951 and 1952 in English and held by 2 WorldCat member libraries worldwide

Recent practical developments of refractory and metal combinations indicate the possibility of high temperature properties which have not been obtainable with metals alone. Study of the factors affecting heat resistance and the mechanisms of the process of erosion at high temperature of such compositions is warranted. Studies to determine the fundamental methods of test that will evaluate the potential usefulness of 'cermet' materials
A Technical briefing on the Initial Graphics Exchange Specification (IGES) by J. C Kelly( Book )

1 edition published in 1981 in English and held by 2 WorldCat member libraries worldwide

ELECTRODEPOSITION OF TITANIUM( Book )

2 editions published between 1955 and 1956 in English and held by 2 WorldCat member libraries worldwide

Procedures for the Precise Determination of Thermal Radiation Properties( Book )

2 editions published between 1966 and 1970 in English and held by 2 WorldCat member libraries worldwide

The broad overall objective of this continuing program is to develop equipment and procedures for measuring the important thermal radiation properties of materials, particularly those used in aircraft, missiles and space vehicles, at temperatures up to the melting point of the most refractory material, and to develop physical standards for checking such equipment and procedures. During the period covered by the report the specific objectives were (1) continued development of the laser-source integrating sphere reflectometer, (2) an error analysis of the shallow cavity technique for measuring normal spectral emittance, and (3) a study of the feasibility of preparing emittance standards for use at temperatures above 1400K (about 2000F). An error analysis of the shallow cavity technique for measuring total normal emittance of ceramic materials at very high temperatures showed that there was an error due to the translucency of the specimens that was as much as +60% for alumina, and a second error due to thermal gradients in the specimen that was on the order of -10%. Two new techniques were devised in the hope of greatly reducing the translucency error. Progress was made in developing codes to compute and correct for the thermal gradients present in the specimen. The laser-source integrating sphere reflectometer for measuring reflectance of specimens at very high temperatures was extensively redesigned to eliminate errors due to flux reaching the detector on the first reflection, and to convert the reflectometer from the substitution to the comparison mode. (Author)
Reference tables for thermocouples by Henry Shenker( Book )

2 editions published in 1955 in English and held by 1 WorldCat member library worldwide

Transmission loss in radio propagation by Central Radio Propagation Laboratory (U.S.)( Book )

2 editions published in 1959 in English and held by 1 WorldCat member library worldwide

INVESTIGATIONS ARE CONCERNED PRIMARILY WITH THE TRANSMISSION LOSS ENCOUNTERED IN THE PROPAGATION OF RADIO ENERGY BETWEEN A TRANSMITTING AND A RECEIVING ANTENNA. Simple methods are given for determining the magnitude of this transmission loss and its variation in space and time (fading). In addition, methods are given for estimating radio noise and interference levels. When combined, these two methods make possible the estimation of the transmitter power and antenna gain required for satisfactory communication, navigation, or other specific uses of the transmissions. A survey is made of the transmission losses expected for a wide range of conditions, i.e., for distances from 10 to 10,000 statute miles; for radio frequencies from 10 kc to 100,000 mc; for vertical or horizontal polarization; for ground waves, ionospheric waves, and tropospheric waves; over sea water or over land which may be either rough or smooth; and for various geographical and climatological regions
Properties of glasses at elevated temperatures( Book )

2 editions published between 1960 and 1964 in English and held by 1 WorldCat member library worldwide

To establish realistic design information applicable to several special glasses, data have been obtained on the stress-rupture characteristics and the elongation during the stress-rupture tests at room temperature, 700 F, and a temperature 50 C below the strain point for CGW 1723 and 7740, and PPG 3235. Data are also presented on the effect of the rate of loading on strength
Planning for software validation, verification, and testing by Patricia Powell( Book )

2 editions published in 1982 in English and held by 1 WorldCat member library worldwide

Today, providing computer software involves greater cost and risk than providing computer equipment. One major reason is hardware is mass produced by proven technology, while software is still produced primarily by the craft of individual computer programmers. The document is for those who direct and those who implement computer projects; it explains the selection and use of validation, verification, and testing (V, V & T) tools and techniques for software development. A primary benefit of practicing V, V & T is increasing confidence in the quality of the software. The document explains how to develop a plan to meet specific software V, V & T goals
X-ray attenuation coefficients from 10 kev to 100 Mev by Gladys White Grodstein( Book )

2 editions published between 1957 and 1959 in English and held by 1 WorldCat member library worldwide

A tabulation of attenuation coefficients of X-rays and gamma rays from 0.01 to 100 Mev for 29 materials is presented. A summary of information on the probability of the basic interaction processes of photons with matter and a detailed analysis of experimental and theoretical evidence are included. Present information on the basic processes is adequate for many applications; however, improved theory and additional experimental data are needed in certain areas. A comparison of calculated and experimental coefficients points up this need
Microstructure of Ceramic Materials. Proceedings of the American Ceramic Society Symposium held in Pittsburgh, PA on 27-28 April, 1963( )

1 edition published in 1964 in English and held by 0 WorldCat member libraries worldwide

In order to review the problems involved in specifying and studying microstructure in ceramics and the factors involved in the interaction between microstructure and physical properties of ceramics, this Symposium on Microstructure of Ceramic Materials was held. The papers presented are published in this volume. Primary responsibility for their technical content must rest, of course, with the individual authors and their organizations. In the first two Chapters, Prof. Van Vlack reviews the geometry of microstructures and how they can be specified and Prof. Frechette describes the principal experimental techniques by which observations of microstructures are made. In Chapter 3, Dr. Burke then describes the factors controlling the development of the microstructure during heat treatment of the ceramic, and their relation to the processing variables of time and temperature. In the next two Chapters, Dr. Stokes discusses the influence of microstructure on the mechanical behavior, and Dr. Stuijts describes the influence on the ferromagnetic properties of ferrites. In the last Chapter, Prof. Lundin examines in detail the microstructure of one material, porcelain, and its ramifications
HEATS OF FORMATION OF METALLIC BORIDES BY FLUORINE BOMB CALORIMETRY : PROGRESS REPORT FOR THE PERIOD, 1 JUNE 1962 TO 30 SEPTEMBER 1962 by United States( )

2 editions published between 1964 and 1965 in English and held by 0 WorldCat member libraries worldwide

The purpose was to provide heat of formation data on boron and intermetallic borides applicable to calculations involving the combustion of slurry fuels. The heats of formation of BF3(g), CF4(g), B4C(c), AlB2.215(c), alphaAlB12(c) and gamma-AlB12(c) were calculated from the heats of combustion of boron, graphite, B4C(c), AlB2.215 (c), alpha-AlB12(c) and gamma-AlB12(c) in fluorine at high pressures. The heat measurements were made in a bomb calorimeter. The samples were subjected to thorough analysis and careful characterization. Three different methods were used to prepare pelleted mixtures of the samples with Teflon powder for combustion. The completeness of combustion was determined by analysis of the unburned sample remaining in the bomb after an experiment. The heats of combustion in fluorine at 298K and the corresponding standard deviations of the means are given, along with the substances for which they were determined. The standard heats of formation at 298K and the estimated over-all accuracies are also given
The role of passive film growth kinetics and properties in stress corrosion and crevice corrosion susceptibility by Jerome Kruger( )

2 editions published between 1970 and 1971 in English and held by 0 WorldCat member libraries worldwide

The role of passivation kinetics, film ductility, and tarnish film formation in stress corrosion cracking were each examined in the following studies: (1) Ellipsometry measurements of film growth kinetics on iron have been made for two anions whose solution cause stress cracking of steel (nitrate and hydroxide) and two that do not (chloride and nitrite). (2) A technique has been developed to measure film ductility directly. This technique couples an ellipsometer with a tensile machine. Thin films on Ta show a ductility of 3-4% in the presence and absence of F( - ), an ion thought to decrease ductility. (3) Pure copper forms tarnish films in cupric acetate and sulfate solutions. It is susceptible to stress corrosion cracking in cupric acetate solution. In the absence of stress, oxide forms all over the copper surface, while stress concentrates oxide formation at the grain boundaries. These experiments point ot a brittle-film rupture mechanism of stress cracking
 
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