You limited your search to:

  Partner: UNT Libraries Government Documents Department
 Serial/Series Title: National Bureau of Standards Reports
 Collection: Technical Report Archive and Image Library
Applications of Waveguide and Circuit Theory to the Development of Accurate Microwave Measurement Methods and Standards

Applications of Waveguide and Circuit Theory to the Development of Accurate Microwave Measurement Methods and Standards

Date: August 1973
Creator: Beatty, R. W.
Description: Report issued by the Bureau of Standards over "the basic theory and analytical methods used in the development of accurate microwave measurement methods and standards" (p. x). These methods are presented and discussed. This report includes tables, illustrations, and photographs.
Contributing Partner: UNT Libraries Government Documents Department
Atomic Energy Levels in Crystals

Atomic Energy Levels in Crystals

Date: February 24, 1961
Creator: Prather, John L.
Description: Report discussing discrete energy levels observed within certain crystals which are due to perturbations of energy levels of the free ion by an electrostatic field arising from the crystal lattice. The analytic procedures for determining the field from the charge configuration are given, and the resulting fields are classified according to their symmetry. After a general survey of group-theoretical ideas, the applicable groups are analyzed in detail, and characters appropriate for both integral and half-integral angular momenta of the free ion are tabulated. Text includes tabulations, equations, and matrices using Wigner and Racah coefficients.
Contributing Partner: UNT Libraries Government Documents Department
Automatic Indexing: A State-of-the-Art Report

Automatic Indexing: A State-of-the-Art Report

Date: March 30, 1965
Creator: Stevens, Mary Elizabeth
Description: Report presenting a state-of-the-art survey of automatic indexing systems and experiments. It was conducted by the Research Information Center and Advisory Service on Information Processing, Information Technology Division, Institute for Applied Technology, National Bureau of Standards. Consideration is first given to indexes compiled by or with the aid of machines, including citation indexes. Advantages, disadvantages, and possibilities for modification and improvement are discussed. Experiments in automatic assignment indexing are summarized. Related research efforts in such areas as automatic classification and categorization, computer use of thesauri, statistical association techniques, and linguistic data processing are described. A major question is that of evaluation, particularly in view of evidence of human inter-indexer inconsistency. It is concluded that indexes based on words extracted from text are practical for many purposes today.
Contributing Partner: UNT Libraries Government Documents Department
Automatic Indexing: A State-of-the-Art Report

Automatic Indexing: A State-of-the-Art Report

Date: February 1970
Creator: Stevens, Mary Elizabeth
Description: Report issued by the U.S. National Bureau of Standards discussing results of a survey conducted on automatic mechanized indexing and data processing. As stated in the introduction, "it has concentrated on the major developments in and related demonstrations of automatic indexing potentialities. Examples are also given of indexes compiled by machine and of potentially related research efforts in such areas as natural language text searching, statistical association techniques used for search and retrieval, and proposed systems for concept processing" (p. 1). This report includes an illustration.
Contributing Partner: UNT Libraries Government Documents Department
Automatic Measurement of Network Parameters: A Survey

Automatic Measurement of Network Parameters: A Survey

Date: June 1976
Creator: Beatty, Robert William
Description: Report issued by the Bureau of Standards over a survey conducted on measurement methods of network parameters. As stated in the introduction, "this paper is concerned with the development of automatic methods of measuring basically the magnitudes and phase differences, or the complex ratio of two sinusoidal voltages, and applications of this capability to determining complex reflection coefficients and transmission coefficients and group delay times of electrical networks" (p. 1). This report includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Automatic Typographic-Quality Typesetting Techniques: A State-of-the-Art Review

Automatic Typographic-Quality Typesetting Techniques: A State-of-the-Art Review

Date: April 7, 1967
Creator: Stevens, Mary Elizabeth & Little, John L.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Automotive Antifreezes

Automotive Antifreezes

Date: November 10, 1948
Creator: Brooks, Donald B.
Description: From abstract: "A report on when antifreeze should be installed, what strength should be used, and what kind of antifreeze is best suited to the service involved."
Contributing Partner: UNT Libraries Government Documents Department
The Band Spectrum of Carbon Monoxide

The Band Spectrum of Carbon Monoxide

Date: July 8, 1966
Creator: Krupenie, Paul H.
Description: Compilation of carbon monoxide band positions, molecular constants, energy levels, potential energy curves, and other molecular properties derived from the spectrum.
Contributing Partner: UNT Libraries Government Documents Department
Basic Magnetic Quantities and the Measurement of the Magnetic Properties of Materials

Basic Magnetic Quantities and the Measurement of the Magnetic Properties of Materials

Date: May 21, 1962
Creator: Sanford, Raymond L. & Cooter, Irvine L.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Bending Moment Due to Wind Pressure on Pole Chart 2A

Bending Moment Due to Wind Pressure on Pole Chart 2A

Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Description: Chart showing bending moment due to wind pressure on poles for various pole heights, circumferences, and loading. It is enlarged from figures in NBS discussion of national electrical safety code (handbook H39).
Contributing Partner: UNT Libraries Government Documents Department
Bibliography and Index on Vacuum and Low Pressure Measurement

Bibliography and Index on Vacuum and Low Pressure Measurement

Date: November 10, 1961
Creator: Brombacher, W. G.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Bibliography and Index on Vacuum and Low Pressure Measurement, January 1960 to December 1965

Bibliography and Index on Vacuum and Low Pressure Measurement, January 1960 to December 1965

Date: May 31, 1967
Creator: Brombacher, W. G.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Bibliography of Temperature Measurement: January 1953 to June 1960

Bibliography of Temperature Measurement: January 1953 to June 1960

Date: April 6, 1961
Creator: Halpern, Carl & Moffat, Robert J.
Description: Report presenting more than 500 references to the field of temperature measurement. These references were collected from two general sources: Scientific and technical literature and government reports. The period covered is from 1953 to June 1960, with some from earlier dates. References are divided into a number of categories based on the type of instrument used. Some references to calibration of instruments and to scientific theories upon which temperature measurement is based are also presented.
Contributing Partner: UNT Libraries Government Documents Department
Bibliography of Temperature Measurement: July 1960 to December 1962

Bibliography of Temperature Measurement: July 1960 to December 1962

Date: September 13, 1936
Creator: Halpern, Carl
Description: Report presenting 700 additional references to the field of temperature measurement as a supplement to NBS Monograph 27, "Bibliography of Temperature Measurement, January 1953 to June 1960" issued April 6, 1961. These references were collected from two general sources: Scientific and technical literature and government reports. The period covered is from July 1960 to December 1962 with some earlier references which were found later. The arrangement of material is the same as in Monograph 27.
Contributing Partner: UNT Libraries Government Documents Department
Bibliography of Temperature Measurement: July 1960 to December 1965

Bibliography of Temperature Measurement: July 1960 to December 1965

Date: April 28, 1967
Creator: Olsen, Lief O. & Halpern, Carl
Description: Report combining National Bureau of Standards Monograph 27 with the references given in Supplement 1 (May 13, 1963) and issued as a single publication to assist users of this material. References concern the field of temperature measurement. These references were collected from two general sources: Scientific and technical literature and government reports. References are divided into a number of categories based on the type of instrument used. Some references to calibration of instruments and to scientific theories upon which temperature measurement is based are also presented.
Contributing Partner: UNT Libraries Government Documents Department
Bibliography on Atomic Transition Probabilities

Bibliography on Atomic Transition Probabilities

Date: August 1, 1962
Creator: Glennon, B. M. & Wiese, W. L.
Description: Report presenting a bibliography on atomic transition probabilities. The papers are arranged according to elements and stages of ionization, and the method employed and class of transitions are indicated behind each reference. Only articles on discrete transitions, both permitted and forbidden, are listed. Also included is a supplementary list of papers dealing with transition probabilities from a general point of view, a table showing the availability of numerical material on the individual atoms and ions, and a table of conversion factors.
Contributing Partner: UNT Libraries Government Documents Department
Bibliography on Molecular and Crystal Structure Models

Bibliography on Molecular and Crystal Structure Models

Date: May 20, 1960
Creator: Smith, Deane K.
Description: Report that briefly describes many of the models of crystal and molecular structures which have appeared in the literature, and presents a bibliography of the publications, grouped according to model types, which describe the models in more detail.
Contributing Partner: UNT Libraries Government Documents Department
Binary Phase Diagrams of Transition Elements

Binary Phase Diagrams of Transition Elements

Date: May 1980
Creator: Waterstrat, Richard M.
Description: Chart issued by the U.S. National Bureau of Standards illustrating the systematic relationships between phase diagrams of transition elements. This chart includes color illustrations.
Contributing Partner: UNT Libraries Government Documents Department
BOLOVAC Systems for Measuring Electrical Quantities From 0.5 MHz Through Microwaves

BOLOVAC Systems for Measuring Electrical Quantities From 0.5 MHz Through Microwaves

Date: January 1972
Creator: Selby, Myron C.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Brief History of Measurement Systems: with a Chart of the Modernized Metric System

Brief History of Measurement Systems: with a Chart of the Modernized Metric System

Date: August 1976
Creator: United States. National Bureau of Standards.
Description: Pamphlet issued by the United States National Bureau of Standards providing an overview of the English system of measurement used in the United States and of the metric system. The internal pages of the pamphlet contain a chart labeled "The Modernized Metric System" which includes tables of common conversions and a chart of the seven base units: meter/length, kilogram/mass, second/time, ampere/electric current, kelvin/temperature, mole/amount of substance, and candela/luminous intensity, as well as two supplementary units: radian/plane angle and steradian/solid angle. There is also a graphic representation of yards versus meters in ruler form at the bottom.
Contributing Partner: UNT Libraries Government Documents Department
The Calculation of Rotational Energy Levels and Rotational Line Intensities in Diatomic Molecules

The Calculation of Rotational Energy Levels and Rotational Line Intensities in Diatomic Molecules

Date: June 1970
Creator: Hougen, Jon T.
Description: Report describing procedures for making quantum mechanical calculations of rotational energy levels and rotational line intensities in diatomic molecules. The procedures are illustrated by sample calculations. A familiarity with the material of this report should enable a practicing electronic spectroscropist to carry out, though in a rather mechanical way, his own theoretical calculations for molecules under experimental investigation.
Contributing Partner: UNT Libraries Government Documents Department
Calculation of Sunrise and Sunset Times at Ionospheric Heights Along a Great Circle Path

Calculation of Sunrise and Sunset Times at Ionospheric Heights Along a Great Circle Path

Date: November 8, 1964
Creator: Brady, A. H.
Description: Formulas, computer program, and illustrations for a great circle path at ionospheric heights.
Contributing Partner: UNT Libraries Government Documents Department
Calibration of Line Standards of Length and Measuring Tapes at the National Bureau of Standards

Calibration of Line Standards of Length and Measuring Tapes at the National Bureau of Standards

Date: May 20, 1960
Creator: Judson, Lewis V.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Calibration of Liquid-in-Glass Thermometers

Calibration of Liquid-in-Glass Thermometers

Date: February 12, 1965
Creator: Swindells, James F.
Description: Report discussing important elements of thermometer design. Factors affecting the use of common types of liquid-in-glass thermometers are included together with tables of tolerances and reasonably attainable accuracies. The calculation of corrections for the temperature of the emergent stem is given in detail for various types of thermometers and conditions of use.
Contributing Partner: UNT Libraries Government Documents Department