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Handbook of Mathematical Functions With Formulas, Graphs, and Mathematical Tables (open access)

Handbook of Mathematical Functions With Formulas, Graphs, and Mathematical Tables

A handbook of mathematical functions that is designed to provide scientific investigations with a comprehensive and self-contained summary of the mathematical functions that arise in physical and engineering problems.
Date: December 1972
Creator: Abramowitz, Milton & Stegun, Irene A.
Object Type: Report
System: The UNT Digital Library
Handbook of Mathematical Functions With Formulas, Graphs, and Mathematical Tables (open access)

Handbook of Mathematical Functions With Formulas, Graphs, and Mathematical Tables

A handbook of mathematical functions that is designed to provide scientific investigations with a comprehensive and self-contained summary of the mathematical functions that arise in physical and engineering problems.
Date: November 1967
Creator: Abramowitz, Milton & Stegun, Irene A.
Object Type: Report
System: The UNT Digital Library
Analysis of Electric Energy Usage in Air Force Houses Equipped with Air-to-Air Heat Pumps (open access)

Analysis of Electric Energy Usage in Air Force Houses Equipped with Air-to-Air Heat Pumps

From Introduction: "One part of this study, which is presented in this Monograph, consists of an analysis of electric energy usage and electric power demand data obtained from a sample group of occupied houses at Little Rock Air Force Base in Arkansas, equipped with heat pumps, water heaters, cooking ranges, clothes dryers, and miscellaneous appliances all operated by electricity."
Date: July 13, 1962
Creator: Achenbach, Paul R.; Davis, Joseph C. & Smith, William T.
Object Type: Report
System: The UNT Digital Library
A Calibration Service for 30 MHz Attenuation and Phase Shift (open access)

A Calibration Service for 30 MHz Attenuation and Phase Shift

Definitions, capabilities of the calibration system and techniques of calibration are presented.
Date: May 1988
Creator: Adair, Robert T. & Russell, David H.
Object Type: Report
System: The UNT Digital Library
Temperature-Induced Stresses in Solids of Elementary Shape (open access)

Temperature-Induced Stresses in Solids of Elementary Shape

Report discussing how solids subjected to non-uniform temperature change develop internal stresses determined by, (1) the temperature distribution within the solid, and (2) certain physical constants of the material. For two varieties of heating, the equations determining stress have been put in convenient form for practical use, and tables of certain temperature functions show how to determine stresses in a slab, in a cylinder, or in a sphere subjected to either of two modes of heating. The temperature-distribution tables independently provide a useful means for the ready estimation of temperature gradients.
Date: June 21, 1960
Creator: Adams, Leason H. & Waxler, Roy M.
Object Type: Report
System: The UNT Digital Library
A Study of the Current Transformer with Particular Reference to Iron Loss (open access)

A Study of the Current Transformer with Particular Reference to Iron Loss

Report issued by the Bureau of Standards over studies conducted on current transformers. Emphasis is placed on iron loss. The results of the studies are presented and discussed. This report includes tables, and illustrations.
Date: 1911
Creator: Agnew, P. G.
Object Type: Report
System: The UNT Digital Library
The Determination of the Constants of Instrument Transformers (open access)

The Determination of the Constants of Instrument Transformers

Report issued by the Bureau of Standards over studies on instrument transformers. As stated in the first paragraph, "the principle of the method here described is the same for both current and potential transformers, being an application of the potentiometer method" (p. 281). The methods and equipment studied are presented and discussed.
Date: 1911
Creator: Agnew, P. G. & Fitch, T. T.
Object Type: Report
System: The UNT Digital Library
Reference Flat Pulse Generator (open access)

Reference Flat Pulse Generator

Introduction: A reference step-like pulse generator is described which has been developed at NBS. This generator can be used for accurately characterizing the step response of various kinds of trap ient recording equipment (oscilloscopes, waveform recorders, transient digitizers, etc.). Basic design principles are given as well as complete circuit diagrams and descriptions. An analysis of the output stage of the generator is presented together with the circuit models for developing a time-domain computer simulation program using extended- SCEPTRE. Preliminary specifications indicate that the NBS Reference Flat Pulse Generator provides a negative-going reference transition duration (90 to 10 percent) of 600 ps, *20 percent with baseline perturbations of less than *2 percent for less than 5 ns.
Date: October 1983
Creator: Andrews, J. R.; Bell, B. A. & Baldwin, E. E.
Object Type: Report
System: The UNT Digital Library
Tentative Provisions for the Development of Seismic Regulations for Buildings: A Cooperative Effort with the Design Professions, Building Code Interests, and the Research Community (open access)

Tentative Provisions for the Development of Seismic Regulations for Buildings: A Cooperative Effort with the Design Professions, Building Code Interests, and the Research Community

Report issued by the U.S. National Bureau of Standards discussing building codes and standards in earthquake-prone areas. As stated in the introduction, "the basic purpose of this project is to present, in one comprehensive document, current state-of-knowledge in the fields of engineering seismology and engineering practice as it pertains to seismic design and construction of buildings" (p. 1). This report includes tables, and illustrations.
Date: June 1978
Creator: Applied Technology Council
Object Type: Report
System: The UNT Digital Library
Geographical Variation in the Heating and Cooling Requirements of a Typical Single-Family House, and Correlation of These Requirements to Degree Days (open access)

Geographical Variation in the Heating and Cooling Requirements of a Typical Single-Family House, and Correlation of These Requirements to Degree Days

Report issued by the Bureau of Mines discussing the heating and cooling requirements for single-family homes. These requirements are determined from "Test Reference Year," or TRY data and long-term geographic climate information. This report includes tables, illustrations, photographs, and a map.
Date: November 1978
Creator: Arens, Edward A. & Carroll, William L.
Object Type: Report
System: The UNT Digital Library
The Measurement of Noise Performance Factors: A Metrology Guide (open access)

The Measurement of Noise Performance Factors: A Metrology Guide

From Introduction: "The purpose of this guide is to describe, discuss, and analyze methods of measuring the average noise factor and average effective input noise temperature of an electronic transducer."
Date: June 1974
Creator: Arthur, M. G. & Anson, W. J.
Object Type: Report
System: The UNT Digital Library
Information Selection Systems Retrieval Replica Copies: a State-of-the-Art Report (open access)

Information Selection Systems Retrieval Replica Copies: a State-of-the-Art Report

Description of 15 specific systems employing search-type selection principles.
Date: December 31, 1961
Creator: Bagg, Thomas C. & Stevens, Mary Elizabeth
Object Type: Report
System: The UNT Digital Library
On-Site Calibration of Flow Metering Systems Installed in Buildings (open access)

On-Site Calibration of Flow Metering Systems Installed in Buildings

Report issued by the National Bureau of Standards over calibration of flow-metering systems. Methods for on-site calibration are discussed. This report includes illustrations.
Date: January 1984
Creator: Baker, David W. & Hurley, C. Warren
Object Type: Report
System: The UNT Digital Library
What About Metric? (open access)

What About Metric?

Pamphlet issued by the United States National Bureau of Standards discussing the reasons that the U.S. decided passed the Metric Conversion Act of 1975 and provides tables, illustrations, and formulas for converting between customary units and metric units of measuring weight, length, volume, and temperature. It also includes a discussion of how one might expect to use metric measurements in the marketplace, in the home, and at work.
Date: October 1976
Creator: Barbrow, Louis E. & Halpin, Suellen
Object Type: Pamphlet
System: The UNT Digital Library
Evaluating the Impact of Securities Regulation on Venture Capital Markets (open access)

Evaluating the Impact of Securities Regulation on Venture Capital Markets

Report providing a detailed and analytical assessment of the economic techniques used by researchers to evaluate the efficiency of capital markets. The application of these techniques to that portion of the capital market which supplies venture funds to small, technology-based firms is emphasized. The primary elements of such analysis are the "efficient market ' hypothesis" and the "capital asset pricing model." The empirical analogue of the latter is commonly referred to as the market model."
Date: June 1980
Creator: Barth, James R.; Cordes, Joseph J. & Tassey, Gregory
Object Type: Report
System: The UNT Digital Library
A Method for the Dynamic Determination of the Elastic, Dielectric, and Piezoelectric Constants of Quartz (open access)

A Method for the Dynamic Determination of the Elastic, Dielectric, and Piezoelectric Constants of Quartz

From Abstract: "Several dynamic determinations have been made of the constants of quartz. Most of these determinations do not take into account the piezoelectric effect; those that do, suffer from certain deficiencies which are discussed in this paper."
Date: June 1, 1960
Creator: Basri, Saul A.
Object Type: Report
System: The UNT Digital Library
A Spectrophotometric Atlas of the Spectrum of CH from 3000A to 5000A (open access)

A Spectrophotometric Atlas of the Spectrum of CH from 3000A to 5000A

Report of the near ultraviolet and visible emission spectrum of CH presented in the form of a spectrophotometric atlas. The spectrum was recorded photoelectrically from an acetylene-oxygen flame in the region 4900 to 3000 A by use of a high-resolution grating monochromator. Each of the lines in the CH spectrum is identified.
Date: February 14, 1961
Creator: Bass, Arnold M. & Broida, H. P.
Object Type: Report
System: The UNT Digital Library
Stabilization of Free Radicals at Low Temperatures: Summary of the NBS Program (open access)

Stabilization of Free Radicals at Low Temperatures: Summary of the NBS Program

From Forward: "Although the first paper in this volume describes the general aspects of the technical management of the program, it is important to emphasize that much of success and productivity of this program stemmed from the sympathetic understanding of its basic viewpoint by both the Department of Defense and the National Bureau of Standards."
Date: August 1, 1960
Creator: Bass, Arnold M. & Broida, H. P.
Object Type: Report
System: The UNT Digital Library
Causes of Variation in Chemical Analyses and Physical Tests of Portland Cement (open access)

Causes of Variation in Chemical Analyses and Physical Tests of Portland Cement

Report discussing variations in comparative tests of portland cements that could lead to the rejection of a material fully conforming to specification requirements, or the acceptance of a material with undesirable chemical or physical properties. Many of the causes for variation in chemical analyses and physical test results are listed in this discussion, and remedies for some of the more frequently encountered deficiencies in apparatus and methods are suggested.
Date: April 27, 1961
Creator: Bean, B. Leonard & Dise, John R.
Object Type: Report
System: The UNT Digital Library
Radio Meteorology (open access)

Radio Meteorology

Report compiling the work done in radio meteorology over the past ten years at the National Bureau of Standards' Central Radio Propagation Laboratory (CRPL). There is an emphasis upon the effects of the lower atmosphere on the propagation of radio waves. The CRPL group has concentrated upon the refraction of radio waves as well as the refractive index structure of the lower atmosphere on both synoptic and climatic scales. Additional chapters on radio-meteorological parameters and the absorption of radio waves by the various constituents of the lower atmosphere.
Date: March 1, 1966
Creator: Bean, B. R. & Dutton, E. J.
Object Type: Report
System: The UNT Digital Library
CRPL Exponential Reference Atmosphere (open access)

CRPL Exponential Reference Atmosphere

From Introduction: "In this monograph, the background of the exponential reference atmosphere will be outlined and a set of radio ray tracings presented. These ray may be used for the solution of many problems involving refraction by means of the exponential reference atmosphere."
Date: October 29, 1959
Creator: Bean, B. R. & Thayer, G. D.
Object Type: Report
System: The UNT Digital Library
Climatic Charts and Data of the Radio Refractive Index for the United States and the World (open access)

Climatic Charts and Data of the Radio Refractive Index for the United States and the World

From Introduction: "This Monograph has as its purpose the compilation and analysis of the extensive radio refractive index data available within the Central Radio Propagation Laboratory of the National Bureau of Standards. This will be accomplished by presenting both tabulations of basic data for specific locations and charts for interpolation to any location."
Date: November 25, 1960
Creator: Bean, B. R.; Horn, J. D. & Ozanich, A. M., Jr.
Object Type: Report
System: The UNT Digital Library
Applications of Waveguide and Circuit Theory to the Development of Accurate Microwave Measurement Methods and Standards (open access)

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

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.
Date: August 1973
Creator: Beatty, R. W.
Object Type: Report
System: The UNT Digital Library
Microwave Attenuation Standards and Measurements (open access)

Microwave Attenuation Standards and Measurements

Report discussing microwave attenuation measurement methods and standards. In addition, a relatively new and more precise way of representing and analyzing an attenuation measurement is presented. This in turn permits more rigorous definitions and error analyses than were previously possible. The referral of microwave attenuation measurements to standards operating at lower frequencies is discussed with particular attention to the errors in the referral processes as well as the errors in the standards themselves. Desirable characteristics are listed for attenuators which are suitable for calibration. Measurement methods are classified and described. Comments are made on the accuracy and convenience of various methods, and references are given which cover most of the basic and important research in this field. Key words: Microwave, attenuation, measurements, standards, tutorial.
Date: April 3, 1967
Creator: Beatty, Robert W.
Object Type: Report
System: The UNT Digital Library