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  Partner: UNT Libraries Government Documents Department
 Decade: 1970-1979
 Collection: Technical Report Archive and Image Library
Geometrical Considerations and Nomenclature for Reflectance

Geometrical Considerations and Nomenclature for Reflectance

Date: October 1977
Creator: Nicodemus, F. E.; Richmond, J. C.; Hsia, J. J.; Ginsberg, I. W. & Limperis, T.
Description: Report presenting a unified approach to the specification of reflectance, in terms of both incident- and reflected- beam geometry. Nomenclature to facilitate this approach is proposed. Nomenclature for categorizing and specifying reflectance quantities for a variety of different beam configurations (both incident and reflected beams) is described, and all are defined and interrelated in terms of the bidirectional reflectance-distribution function. The conditions under which the formalism can be applied, including situations involving considerable sub-surface scattering, are carefully established. The entire treatment is limited to the domain of classical geometrical-optics radiometry and does not take into account interference and diffraction phenomena, such as are frequently encountered with highly coherent radiant flux.
Contributing Partner: UNT Libraries Government Documents Department
Prereduced Iron Ore Pellets: Preparation, Properties, Utilization

Prereduced Iron Ore Pellets: Preparation, Properties, Utilization

Date: 1970
Creator: Fine, M. M. & Melcher, N. B.
Description: Report discussing the a new agglomerated raw material: partially reduced, hardened iron ore pellets. The pellets are a versatile product suitable for adaptation to both ironmaking and steelmaking. Includes discussion of the technology involved in making prereduced pellets, laboratory techniques, problems of production, data from blast furnace smelting, the economics of production, and the future of the industry.
Contributing Partner: UNT Libraries Government Documents Department
From Sundials to Atomic Clocks: Understanding Time and Frequency

From Sundials to Atomic Clocks: Understanding Time and Frequency

Date: December 1977
Creator: Jespersen, James & Fitz-Randolph, Jane
Description: Book presenting an introduction to time, timekeeping, and the uses of time information, especially in the scientific and technical areas. Serves as introductory text for laymen.
Contributing Partner: UNT Libraries Government Documents Department
The Dynamics of Fields of Higher Spin

The Dynamics of Fields of Higher Spin

Date: August 1976
Creator: Hayward, Raymond W.
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
Measurement Assurance for Gage Blocks

Measurement Assurance for Gage Blocks

Date: February 1979
Creator: Croarkin, Carroll; Beers, John & Tucker, Clyde
Description: Report discussing the philosophy of measurement assurance and the three levels of measurement assurance programs. The measurement assurance programs are outlined to show how control over the measurement process can be maintained and how the offset (or systematic error) from the unit of length maintained by the National Bureau of Standards ban be made negligible. This monograph is intended for those who need to know on a continuing basis the uncertainty of their gage block calibration procedure.
Contributing Partner: UNT Libraries Government Documents Department
Relativistic Many-Body Bound Systems: Electromagnetic Properties

Relativistic Many-Body Bound Systems: Electromagnetic Properties

Date: April 1977
Creator: Danos, Michael & Gillet, Vincent
Description: Report presenting the formulae for the calculation of the electron scattering form factors, and of the static magnetic dipole and electric quadrupole moments, of relativistic many-body bound systems. The framework, given in NBS Monograph 147, is relativistic quantum field theory in the Schrodinger picture ; the physical particles, i.e. the solutions of the interacting fields, are given as linear combinations of the solutions of the free fields, called the parton fields. The parton-photon interaction is taken as given by minimal coupling, p -> p - eA ; in addition the contribution of the photon-vector meson vertex of the vector dominance model is derived.
Contributing Partner: UNT Libraries Government Documents Department
Interactions of High Energy Particles With Nuclei

Interactions of High Energy Particles With Nuclei

Date: September 1975
Creator: Czyz, Wieslaw
Description: Report discussing elastic scattering and diffractive production processes induced in nuclear targets by high energy projectiles. Special attention is paid to the interaction of high energy hadrons and photons. The common features of all these processes are emphasized throughout the article: The multiple scattering and shadowing processes inside of the target nuclei. An effort is made to develop a unified way of treating nuclear interactions of particles which are either hadrons or exhibit some hadronic components in such interactions.
Contributing Partner: UNT Libraries Government Documents Department
Liquid-in-Glass Thermometry

Liquid-in-Glass Thermometry

Date: January 1976
Creator: Wise, Jacquelyn A.
Description: Report containing information of general interest to manufacturers and users of liquid-in-glass thermometers. This report supersedes Monograph 90. Instructions explaining how to submit a thermometer to the National Bureau of Standards for calibration are provided, and the techniques and equipment, such as stirred liquid comparison baths, used in the calibration procedures are described. A discussion of important principles of acceptable thermometer design and factors affecting their use is included. Listed are tables of tolerances reflecting good manufacturing practices and reasonably attainable accuracies expected with liquid-in-glass thermometers. 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
Graphical Recoupling of Angular Momenta

Graphical Recoupling of Angular Momenta

Date: October 1973
Creator: Lehman, D. R. & O'Connell, J. S.
Description: Report presenting a diagrammatic method for solving angular momentum recoupling problems. It is shown that a few graphical elements with a set of rules for their use lead to the solution of many types of recoupling problems in an intuitive and systematic way. Several examples are given together with exercises to develop the reader's facility with the method.
Contributing Partner: UNT Libraries Government Documents Department
A Gage Block Measurement Process Using Single Wavelength Interferometry

A Gage Block Measurement Process Using Single Wavelength Interferometry

Date: December 1975
Creator: Beers, John S.
Description: Report describing the interferometric measurement process using a laser light source and a Kosters type gage block interferometer. Continuous evaluation and refinement of the process is aided by statistical treatment and control chart techniques. All error sources, both random and systematic, are evaluated and the process is maintained in a state of statistical control.
Contributing Partner: UNT Libraries Government Documents Department