Acid-Base Behavior in Aprotic Organica Solvents (open access)

Acid-Base Behavior in Aprotic Organica Solvents

Report presenting the National Bureau of Standards' research program designed to determine and explain acid-base behavior in aprotic organic solvents and to develop methods and reference materials for determining total acid and base content and relative strengths of acids and bases in the media.
Date: August 1968
Creator: Davis, Marion Maclean
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

Bending Moment Due to Wind Pressure on Pole Chart 2A

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).
Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Object Type: Technical Drawing
System: The UNT Digital Library
Bibliography on Atomic Transition Probabilities (open access)

Bibliography on Atomic Transition Probabilities

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.
Date: August 1, 1962
Creator: Glennon, B. M. & Wiese, W. L.
Object Type: Report
System: The UNT Digital Library
Brief History of Measurement Systems: with a Chart of the Modernized Metric System (open access)

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

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.
Date: August 1976
Creator: United States. National Bureau of Standards.
Object Type: Pamphlet
System: The UNT Digital Library

Catenary Chart 3

Chart of catenary curve ordinates: "The curve gives approximate values of sag at all points on the catenary curve expressed in per cent of the center sag. The error is negligible for all spans in which the center sag is less than 10% of the span length." It is enlarged from figures in NBS discussion of national electrical safety code (handbook H39).
Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Object Type: Technical Drawing
System: The UNT Digital Library

[Charts for Various Aspects of Poles]

Chart 1A-1B. Conductor loading nomograph, Chart 2A. Bending moment due to wind pressure on pole, Chart 2B. Ultimate resisting moments of wood poles, Chart 3. Catenary curve.
Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Object Type: Technical Drawing
System: The UNT Digital Library

Conductor Loading Nomograph Chart 1B

Chart related to conductor loading showing vertical, transverse and conductor loads in pounds per linear feet of conductor. It is enlarged from figures in NBS discussion of national electrical safety code (handbook H39).
Date: August 7, 1944
Creator: United States. National Bureau of Standards.
Object Type: Technical Drawing
System: The UNT Digital Library
Cooperative Measurements of Radio Fading in 1925 (open access)

Cooperative Measurements of Radio Fading in 1925

Scientific paper issued by the Bureau of Standards over studies conducted on radio fading. As stated in the abstract, "the series of measurements on fading were devoted to studies of fading effects during the sunset period, effects during the solar eclipse of January 24, the fading variations throughout a 24-hour day, and the effects of high transmitting power on fading" (p. 419). This paper includes tables, maps, illustrations, and photographs.
Date: August 17, 1927
Creator: Dellinger, J. H.; Jolliffe, C. B. & Parkinson, T.
Object Type: Report
System: The UNT Digital Library
Determining Cost-Effective Insulation Levels for Masonry and Wood-Frame Walls in New Single-Family Housing (open access)

Determining Cost-Effective Insulation Levels for Masonry and Wood-Frame Walls in New Single-Family Housing

Report issued by the National Bureau of Standards over calculations for cost-effective insulation in single-family housing. Different calculations are made with regards to location, energy pricing, heating and cooling equipment available, and financial criteria. This report includes tables, illustrations, and photographs.
Date: August 1981
Creator: Petersen, Stephen R.; Barnes, Kimberly A. & Peavy, Bradley A.
Object Type: Report
System: The UNT Digital Library
Direct Measurement of the Electric Field of a Laser Pulse--Theory (open access)

Direct Measurement of the Electric Field of a Laser Pulse--Theory

From abstract: This paper presents the conflicts in the design and gives a solution. The complete evaluation requires assembly of the proposed apparatus to assess final accuracy.
Date: August 1985
Creator: Johnson, Eric Gunnar, Jr.
Object Type: Report
System: The UNT Digital Library
The Divergent Beam (Kossel) X-Ray Method and Its Uses in Measuring Strain Contours in an Individual Grain of Fe-3 Weight Percent Si Transformer Sheet (open access)

The Divergent Beam (Kossel) X-Ray Method and Its Uses in Measuring Strain Contours in an Individual Grain of Fe-3 Weight Percent Si Transformer Sheet

From Abstract: "The results showed that a variable strain distribution existed in the alloy sheet at the time it was ready for insertion into a transformer core. Small applied comprehensive and tensile loads tended to rearrange this variable strain distribution but not appreciably alter the total stored elastic energy."
Date: August 1973
Creator: Yakowitz, Harvey
Object Type: Report
System: The UNT Digital Library
The Dynamics of Fields of Higher Spin (open access)

The Dynamics of Fields of Higher Spin

Report presenting a relativistic theory of motion that is free of many of the difficulties common in relativistic equations of motion. This Lagrangian theory describes fields and particles with arbitrary mass and charge and having any discrete spin, integer or half integer.
Date: August 1976
Creator: Hayward, Raymond W.
Object Type: Report
System: The UNT Digital Library
Effects of Finite Lattice Heat Capacity on Spin Lattice Relaxation: Theory and Numerical Analysis (open access)

Effects of Finite Lattice Heat Capacity on Spin Lattice Relaxation: Theory and Numerical Analysis

Report discussing the transient magnetic behavior of a paramagnetic substance, after an initial disturbance, considered theoretically for a variety of situations in which the lattice temperature rises as a result of energy flow from the magnetic (electron spin) system. Next, the opposite extreme is considered - that in which the resonant and remaining modes are totally uncoupled. Finally, there is a consideration of the case of spins coupled only to the resonant phonons, which in turn are coupled to a constant temperature bath, whether this be the helium or the remaining modes.
Date: August 1, 1967
Creator: Peterson, Robert L.
Object Type: Report
System: The UNT Digital Library
Electron Optical Studies of Low-Pressure Gases (open access)

Electron Optical Studies of Low-Pressure Gases

From Abstract: "This document is the final report of research carried on in the Electron Physics Section of the National Bureau of Standards during the period from February 1, 1955 to March 1962 in developing an electron optical method for the visualization of low-pressure gas flow."
Date: August 16, 1963
Creator: Marton, L.; Schubert, David C. & Mielczarek, S. R.
Object Type: Report
System: The UNT Digital Library
Energy Measurement in the Standard Penetration Test (open access)

Energy Measurement in the Standard Penetration Test

Report issued by the National Bureau of Standards over standard penetration testing. The history, limitations, and testing procedures are presented. This report includes tables, photographs, and illustrations.
Date: August 1981
Creator: Kovacs, William D.; Salomone, Lawrence A. & Yokel, Felix Y.
Object Type: Report
System: The UNT Digital Library
Fitness-for-Service Criteria for Assessing the Significance of Fatigue Cracks in Offshore Structure (open access)

Fitness-for-Service Criteria for Assessing the Significance of Fatigue Cracks in Offshore Structure

Abstract: Results of a research program to develop fitness-for-service criteria for assessing the significance of fatigue cracks in offshore structures are presented in five papers. Each paper describes the goals and approaches to a specific task and details the results of the study.
Date: August 1985
Creator: Cheng, Yi-Wen
Object Type: Report
System: The UNT Digital Library
Formulas, Tables and Curves for Computing the Mutual Inductance of Two Coaxial Circles (open access)

Formulas, Tables and Curves for Computing the Mutual Inductance of Two Coaxial Circles

Scientific paper issued by the Bureau of Standards over the mutual inductance of two coaxial circles. As stated in the abstract, "a number of examples are given to show the methods of computation by the different formulas, tables, and charts" (p. 541). This paper includes tables, and illustrations.
Date: August 5, 1924
Creator: Curtis, Harvey L. & Sparks, C. Matilda
Object Type: Report
System: The UNT Digital Library
Investigation of Construction Failure of Harbour Cay Condominium in Cocoa Beach, Florida (open access)

Investigation of Construction Failure of Harbour Cay Condominium in Cocoa Beach, Florida

Report issued by the National Bureau of Standards over investigations of construction failure in Cocoa Beach, Florida. Factors for the construction failure are discussed. This report includes tables, illustrations, and photographs.
Date: August 1982
Creator: Lew, H. S.; Carino, N. J.; Fattal, S. G. & Batts, M. E.
Object Type: Report
System: The UNT Digital Library
Line Parameters and Computed Spectra for Water Vapor Bands at 2.7 mu (open access)

Line Parameters and Computed Spectra for Water Vapor Bands at 2.7 mu

From Foreword: "This Monograph is one of a series intended to provide fundamental information required for the estimation and interpretation of atmospheric transmittance at infrared frequencies. Part I of this Monograph presents the fundamental properties of the 2.7m water vapor band in terms of line absorptions and the integrated transmittance at any frequency for infinite resolution. Part II presents examples of the "degraded" transmittance for finite resolution, as a function of the spectral slit width, concentration, and pressure with which direct observations may be compared."
Date: August 3, 1964
Creator: Gates, David M.; Calfee, Robert F.; Hansen, David W. & Benedict, W. S.
Object Type: Report
System: The UNT Digital Library
Microwave Impedance Measurements and Standards (open access)

Microwave Impedance Measurements and Standards

Report presenting a survey and discussion of well-known microwave impedance measurement techniques. The discussion includes an introduction which emphasizes basic concepts and reflection coefficient-voltage standing-wave ratio relationships. Sources of error in the various measurement techniques are discussed and methods to reduce errors are presented. Methods using rotating loops and resonance lines are included and a brief discussion of microwave impedance standards is given.
Date: August 12, 1965
Creator: Beatty, Robert W.
Object Type: Report
System: The UNT Digital Library

The Modernized Metric System: the International System of Units-SI

Revised wall chart of the seven base units of the modernized metric system, including length, mass, time, electric current, temperature, amount of substance, luminous intensity, and plane angle.
Date: August 1981
Creator: United States. National Bureau of Standards.
Object Type: Poster
System: The UNT Digital Library
Motor-Vehicle Headlighting (open access)

Motor-Vehicle Headlighting

A report on the necessity of improved motor-vehicle lighting.
Date: August 5, 1925
Creator: Carlson, R. E.
Object Type: Report
System: The UNT Digital Library
National Bureau of Standards Research Reports: Summer 1986 (open access)

National Bureau of Standards Research Reports: Summer 1986

Summary describing research projects and other activities undertaken by the U.S. National Bureau of Standards, lists of publications from the year, and a calendar of upcoming events.
Date: August 1987
Creator: United States. National Bureau of Standards.
Object Type: Report
System: The UNT Digital Library