Serial/Series Title
Country
States
64 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
64
next
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.
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
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
System:
The UNT Digital Library
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.
System:
The UNT Digital Library
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
System:
The UNT Digital Library
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.
System:
The UNT Digital Library
Automatic Measurement of Network Parameters: A Survey
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.
Date:
June 1976
Creator:
Beatty, Robert William
System:
The UNT Digital Library
Research and Innovation in the Building Regulatory Process
Report issued by the U.S. National Bureau of Standards discussing studies conducted on building codes, standards, and regulations. The report includes transcripts from the 12th annual National Conference of States on Building Codes and Standards. This report includes tables, and illustrations.
Date:
June 1980
Creator:
Berry, Sandra A.
System:
The UNT Digital Library
The 1958 He4 Scale of Temperatures: Part 1. Introduction, Part 2. Tables for the 1958 Temperature Scale
Report containing information regarding He4 vapor pressure measurement as of 1958, the recent history of the vapor pressure temperature scale, and a series of tables containing these measurements.
Date:
June 17, 1960
Creator:
Brickwedde, F. G. (Ferdinand Graft), 1903-; van Dijk, H.; Durieux, M.; Clement, J. R. & Logan, J. K.
System:
The UNT Digital Library
Stress Corrosion Cracking Control Measures
From Abstract: "This publication attempts to diminish the incidence of stress corrosion failures by assembling the available practical measures to avoid or minimize the problem and present these measures in a form comprehensible to those persons responsible for the design, fabrication, and maintenance of new structures."
Date:
June 1977
Creator:
Brown, B. F.
System:
The UNT Digital Library
Microwave Spectral Tables: Volume 5. Spectral Line Listing
From Abstract: "This volume is a listing of the spectral lines reported in Volume I, III, and IV of the Microwave Spectral Tables. These lines are listed according to ascending magnitude of frequency and should provide a steady reference."
Date:
June 1968
Creator:
Cord, Marian S.; Lojko, Matthew S. & Petersen, Jean D.
System:
The UNT Digital Library
Microwave Spectral Tables: Volume 4. Polyatomic Molecules Without Internal Rotation
From Introduction: "This volume contains data on the microwave spectra of 166 polyatomic molecules incapable of exhibiting internal rotation."
Date:
June 1968
Creator:
Cord, Marian S.; Petersen, Jean D.; Lojko, Matthew S. & Haas, Rudolph H.
System:
The UNT Digital Library
Reduction of Data for Piston Gage Pressure Measurements
Report issued by the U.S. National Bureau of Standards discussing piston gage pressure and reducing errors of measurement. Sources of error are described and evaluated in order to "reduce the magnitude of overall error of measurement" (p. 1). This report includes tables, and illustrations.
Date:
June 17, 1963
Creator:
Cross, J. L.
System:
The UNT Digital Library
Reduction of Data for Piston Gage Pressure Measurements
Report discussing pressure measurements made with piston gages that are affected by gravity, temperature, pressure, and several other variables. For accurate determinations of pressure the calculations must take these variables into account. A general equation is developed and simplified procedures for calculating pressure are illustrated.
Date:
June 17, 1963
Creator:
Cross, J. L.
System:
The UNT Digital Library
Optical Time-Domain Reflectometer Performance and Calibration Studies
from Introduction: The measurement accuracy of the optical time-domain reflectometer (OTDR) is restricted in some applications by a limited operational dynamic range and by a lack of standardized test procedures. In an effort to better understand these restrictions, we have measured the range of linearity of some avalanche photodiodes used as backscatter detectors. Also, the effect of input launch conditions is examined and a possible standardized OTDR test procedure is proposed. Using these suggestions, we have made comparisons between attenuation values determined by cutback and backscatter methods and found that good agreement is possible. Finally, some methods are described for checking the response. linearity of OTDR systems.
Date:
June 1983
Creator:
Danielson, B. L.
System:
The UNT Digital Library
The Characterization of Optical Fiber Waveguides: A Bibliography with Abstracts, 1970-1980
Abstract: This bibliography contains approximately 450 citations of papers concerning the characterization of optical fiber waveguides. Papers from scientific journals, trade journals and conferences are included along with book chapters. The citations of organized by parameter measured and measurement method. Where published abstracts are available they are included.
Date:
June 1981
Creator:
Day, G. W.
System:
The UNT Digital Library
Visual Range: Concepts, Instrumental Determination, and Aviation Applications
From Abstract: "This document is a review of the principles, procedures, and instruments used in the measurement of visual range. The fundamental concepts of the visual range of the objects and lights are discussed. The principles of operation of the several classes of atmospheric attenuation meters are reviewed and representative instruments are described."
Date:
June 1977
Creator:
Douglas, C. A. & Booker, R. L.
System:
The UNT Digital Library
Corrosion and Protection of Steel Piles in a Natural Seawater Environment
From Introduction: "This paper describes some results of the first eight years of a fifteen year program in which a variety of coating and catholic protection systems are evaluated on their ability to protect steel piles in offshore conditions at Dam Neck, Virginia. It includes a description of the methods used in the evaluation and the results found on these systems."
Date:
June 1977
Creator:
Escalante, E.; Iverson, W. P.; Gerhold, W. F.; Sanderson, B. T. & Alumbaugh, R. L.
System:
The UNT Digital Library
DATAPLOT: Introduction and Overview
Abstract: This manual provides DATAPLOT code solution to a variety of commonly occurring graphical problems. A line-by-line explanation of code is given, along with illustrations and general discussion.
Date:
June 1984
Creator:
Filliben, James J.
System:
The UNT Digital Library
Shielded Balanced and Coaxial Transmission Lines: Parametric Measurements and Instrumentation Relevant to Signal Waveform Transmission in Digital Service
Abstract: A method is presented for determining the impulse and step responses of a shielded cable using time domain terminal measurements and a physically based mathematical model for the transmission line properties of the cable. The method requires a computer controlled time domain measurement system and was implemented using the NBS Automatic Pulse Measurement System (APMS). Data are also developed for the frequency domain complex propagation function (attenuation and its related minimum-phase shift). The method is applied to 12 shielded paired-conductor (balanced) cables and 5 coaxial cables. Time domain responses are presented for three nominal cable lengths, 60 m (200 ft), 150 m (500 ft), and 300 m (1000 ft). The time domain responses are applied to the estimation of bit error rate increases due to the insertion of the cables into a digital signaling system employing a balanced polar NRZ waveform. Also discussed is the application of the time domain responses to time domain reflectometry techniques for cable acceptance tests and field-site testing of installed cables.
Date:
June 1981
Creator:
Gans, William L. & Nahman, N. S.
System:
The UNT Digital Library
The Ultra-Violet and Visible Transmission of Eye-Protective Glasses
Technical paper issued by the Bureau of Standards over studies conducted on the development of protective eye wear. The methods and equipment used are presented and discussed. This paper includes tables, and illustrations.
Date:
June 7, 1919
Creator:
Gibson, K. S. & McNicholas, H. J.
System:
The UNT Digital Library
The Effect of Time Ordering on the Lyman α Profile
Report investigating the effects of time-ordering over the complete line profile using a unified theory of spectral line broadening previously developed. The behavior of the time-ordered thermal average and un-time-ordered thermal average are compared. The Fourier transform of the thermal average is obtained analytically. Calculations for the line profile of the Lyman-[functional symbol alpha] line of hydrogen are presented and are representative in that the full thermal average is replaced by the thermal average with the electron velocity distribution approximated by f(v)=[functional symbol alpha] (v-vav) where vav is the thermal velocity for the plasma in question.
Date:
June 1971
Creator:
Godfrey, J. T.; Vidal, C. R.; Smith, E. W. & Cooper, J.
System:
The UNT Digital Library
Transparent Metrology of Signal to Noise Ratios of Noisy Band-Limited Digital Signals
From abstract: I propose the use of a template method for quantitative, correct, and transparent measurement of signal power to additive noise power ratios (SNR) of digital signals and systems under full operating conditions. Outer guard chips of digital templates hold intersymbol interference fixed on inner target chips in realizations of the respective template patterns in traffic. The proposed template method needs to be developed and proven as a potentially valuable metrology capability; it can be especially important for real time online performance assessment and monitoring of digital communication systems.
Date:
June 1985
Creator:
Halford, Donald
System:
The UNT Digital Library
Glass Limit Standards Deposited at NBS for Railway, Highway, and Airways Traffic Signal Colors: History, Permanence and Colorimetric Properties
Permanence and colorimetric properties of signal glass.
Date:
June 1971
Creator:
Haupt, Geraldine W.
System:
The UNT Digital Library
A Near-Field Array of Yagi-Uda Antennas for Electromagnetic Susceptibility Testing
Abstract: In electromagnetic susceptibility testing of electronic equipment, the ideal incident field is a plane wave. To approximate this condition, a seven-element array of Yagi-Uda antennas has been constructed and tested at a frequency of 500 MHz. The element weightings are determined by a near-field synthesis technique which optimizes the uniformity of the field throughout a rectangular test volume in the near field of the array. The amplitude and phase of the electric field have been measured throughout the test volume with a short dipole probe, and the agreement with the theory is excellent.
Date:
June 1985
Creator:
Hill, David A. & Koepke, Galen H.
System:
The UNT Digital Library