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
Computers, Health Records, and Citizen Rights

Computers, Health Records, and Citizen Rights

Date: December 1976
Creator: Westin, Alan F.; Baker, Michael A.; Annas, George J.; Silberberg, Richard; Broder, Jamie; Isbell, Florence et al.
Description: Report issued by the Bureau of Standards over studies on the benefits of computerized record-keeping. Medical records were chosen for the studies, and they also focus on patient privacy and rights. This report includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Selected Properties of Hydrogen (Engineering Design Data)

Selected Properties of Hydrogen (Engineering Design Data)

Date: February 1981
Creator: Hord, J.; McCarty, Robert D. & Roder, H. M.
Description: Report issued by the Bureau of Standards over the thermophysical properties of hydrogen. Properties of hydrogen in varying states (gaseous, liquid, solid, etc.) are presented and discussed. This report includes tables, and illustrations.
Contributing Partner: UNT Libraries Government Documents Department
Colors of Signal Lights: Their Selection, Definition, Measurement, Production, and Use

Colors of Signal Lights: Their Selection, Definition, Measurement, Production, and Use

Date: April 3, 1967
Creator: Breckenridge, F. C.
Description: Report discussing the selection, specifications, and use of signal-light colors. It discusses the nature of the problem, and the mathematical representation, recognition, production, control, and use of such colors. The characteristics of different types of chromaticity boundaries and the purpose and effect of the requirement for similarity of chromaticity characteristics are given special consideration. The treatment is varied according to the intended use. The discussion of the control of colors and the section on the use of colors are nontechnical, whereas the section on the production of signal colors is designed for the colorimetrist who is faced with the problem of selecting limit filters or drafting a specification.
Contributing Partner: UNT Libraries Government Documents Department
Shielding Against Gamma Rays, Neutrons, and Electrons From Nuclear Weapons: A Review and Bibliography

Shielding Against Gamma Rays, Neutrons, and Electrons From Nuclear Weapons: A Review and Bibliography

Date: February 24, 1964
Creator: Hubbell, J. H. & Spencer, L. V.
Description: Report discussing the problem of predicting dose rates and of estimating the effectiveness of shielding from radiations resulting from nuclear explosions. A number of calculations and supporting experiments regarding the penetration and diffusion of gamma rays, neutrons, and electrons through air and bulk materials are summarized. Indications are given of gaps in such input information. A selection of 485 references from the unclassified literature is presented, of which 388 are cataloged as to source geometry and energy, absorber material and configuration, type of data presented, and method of calculation or experimental technique. These cataloged references include radiation field studies ranging from the point-source infinite-medium situation up through such complicated geometries as foxholes, shelters, and conventional structures. The other references are of a general or review nature or contain input spectral data.
Contributing Partner: UNT Libraries Government Documents Department
Compilation of the Melting Points of the Metal Oxides

Compilation of the Melting Points of the Metal Oxides

Date: October 10, 1963
Creator: Schneider, Samuel J.
Description: Report compiling the melting points of 70 metal oxides published prior to January 1963. Both the original melting point and the equivalent value based on the International Practical Temperature Scale of 1948 are presented. Included in the survey is information on pertinent experimental details such as the method of temperature measurement, purity, furnace type, and environmental conditions.
Contributing Partner: UNT Libraries Government Documents Department
On the Statistical Theory of Electromagnetic Waves in a Fluctuating Medium (II): Mathematical Basis of the Analogies to Quantum Field Theory

On the Statistical Theory of Electromagnetic Waves in a Fluctuating Medium (II): Mathematical Basis of the Analogies to Quantum Field Theory

Date: December 7, 1964
Creator: Furutsu, K.
Description: Report discussing the relationship between quantum field theory and the the statistical theory of waves. Basic equations exist in the latter theory which correspond closely to the fundamental equations of the former theory; i.e., to the commutation relations and the Heisenberg equation of motion. A probability density function of waves is introduced here which corresponds to the probability amplitude function in quantum mechanics. The theory of the statistical Green's functions and their relationships to the expectation values of the physical variables is also extensively developed. It is found that there exists a one-to-one correspondence between the formalism of Green's functions presented here and that used in field theory.
Contributing Partner: UNT Libraries Government Documents Department
Reduction of Data for Piston Gage Pressure Measurements

Reduction of Data for Piston Gage Pressure Measurements

Date: June 17, 1963
Creator: Cross, J. L.
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
Microwave Impedance Measurements and Standards

Microwave Impedance Measurements and Standards

Date: August 12, 1965
Creator: Beatty, Robert W.
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
The NBS Standard Hygrometer

The NBS Standard Hygrometer

Date: May 1, 1964
Creator: Wexler, Arnold & Hyland, Richard W.
Description: Report describing a gravimetric hygrometer that serves as the NBS standard instrument for the measurement of the moisture content of gases on an absolute basis in terms of mixing ratio (mass water vapor/ unit mass of dry gas). The National Bureau of Standards and other laboratory reference and working instruments are compared and calibrated with this instrument. The measuring operation involves the absorption of the water vapor from a water vapor-gas mixture by a solid desiccant and the determination of the mass of this water vapor by precision weighing; it also involves the determination of the volume of the associated gas of known density by counting the fillings of two calibrated stainless steel cylinders. The construction and operation of the instrument is described. Discussions of the tests and calibrations of component parts, and of the sources of errors also are included. There is also an analysis of the random and systematic errors effecting the overall accuracy in the determination of mixing ratio.
Contributing Partner: UNT Libraries Government Documents Department
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