Thermodynamic and Related Properties of Parahydrogen From the Triple Point to 100 K at Pressures to 340 Atmospheres (open access)

Thermodynamic and Related Properties of Parahydrogen From the Triple Point to 100 K at Pressures to 340 Atmospheres

From Introduction: "In the present report, therefore, polynomials representing isotherms and isochores are combined with numerical methods of computation for the purpose of improving accuracy, in particular for the derivatives of the P-p-T surface."
Date: August 10, 1965
Creator: Roder, H. M.; Weber, L. A. & Goodwin, R. D.
System: The UNT Digital Library
A Table of Radiation Characteristics for Uniformly Spaced Optimum Endfire Arrays with Equal Sidelobes (open access)

A Table of Radiation Characteristics for Uniformly Spaced Optimum Endfire Arrays with Equal Sidelobes

From Abstract: "Numerical results, in table form, on the required phases, the directive gain, the current excitations, the location of all the sidelobes and nulls, and the beamwidths for uniformly spaced optimum endfire arrays with equal sidelobes are given."
Date: December 10, 1965
Creator: Ma, M. T. & Hyovalti, D. C.
System: The UNT Digital Library
Ionospheric Radio Propagation (open access)

Ionospheric Radio Propagation

From Preface: "The purpose of this book is to replace, in part, a previous publication of the National Bureau of Standards (Circular 462) with the same title. The scope of the present work has therefore been broadened to include aspects of ionospheric radio propagation which were not treated in earlier publication."
Date: April 1, 1965
Creator: Davies, Kenneth
System: The UNT Digital Library
Standard Cells: Their Construction, Maintenance, and Characteristics (open access)

Standard Cells: Their Construction, Maintenance, and Characteristics

From Abstract: "This Monograph contains information on the construction, maintenance, and characteristics of standard cells. The effects of temperature, pressure, electric current, light, shock, and vibration on standard cells are discussed."
Date: January 15, 1965
Creator: Hamer, Walter J.
System: The UNT Digital Library
Effects of Thermal Shrinkage on Built-up Roofing (open access)

Effects of Thermal Shrinkage on Built-up Roofing

From Introduction: "The object of this research was to identify and study some of the factors involved in premature failures and to relate the pertinent factors to roof performance."
Date: March 4, 1965
Creator: Cullen, William C.
System: The UNT Digital Library
Spot Diagrams for the Prediction of Lens Performance From Design Data (open access)

Spot Diagrams for the Prediction of Lens Performance From Design Data

From Abstract: "This Monograph presents an outline of the methods used at the National Bureau of Standards to predict the performance of lenses from an analysis of their designs. The technique is based on the use of spot diagrams, which are analogs of star image tests, and makes extensive use of high-speed digital computers."
Date: September 7, 1965
Creator: Stavroudis, Orestes N. & Sutton, Loyd E.
System: The UNT Digital Library
On the Formulation and Numerical Evaluation of a set of Two-Phase Flow Equations Modelling the Cooldown Process (open access)

On the Formulation and Numerical Evaluation of a set of Two-Phase Flow Equations Modelling the Cooldown Process

Summarizes progress to date on the formulation and numerical integration of systems of equations modeling general two-phase flows in a pipe.
Date: January 4, 1965
Creator: Jarvis, Stephen, Jr.
System: The UNT Digital Library
HAYSTAQ: a Mechanized System for Searching Chemical Information (open access)

HAYSTAQ: a Mechanized System for Searching Chemical Information

Description of a computer program for searching chemical information on magnetic tape.
Date: September 27, 1965
Creator: Marden, Ethel C.
System: The UNT Digital Library
Extension of Programs for Calculations of Great Circle Paths and Sunrise-Sunset Times (open access)

Extension of Programs for Calculations of Great Circle Paths and Sunrise-Sunset Times

Modification of an earlier program to remove restrictions in calculating the short or long great circle path.
Date: February 18, 1965
Creator: Crary, J. H.
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.
System: The UNT Digital Library
Oxidation of Polycyclic, Aromatic, Hydrocarbons: A Review of the Literature (open access)

Oxidation of Polycyclic, Aromatic, Hydrocarbons: A Review of the Literature

Report discussing the literature on the oxidation of polycyclic, aromatic hydrocarbons. Information has been assembled on (1) the oxidants effective in the oxidation of such hydrocarbons, (2) the relative reactivity of the hydrocarbons, (3) the conditions under which oxidation proceeds, (4) the chemical mechanisms involved when such oxidations occur, and (5) the products formed.
Date: September 17, 1965
Creator: Tipson, R. Stuart
System: The UNT Digital Library
Calibration of Liquid-in-Glass Thermometers (open access)

Calibration of Liquid-in-Glass Thermometers

Report discussing important elements of thermometer design. Factors affecting the use of common types of liquid-in-glass thermometers are included together with tables of tolerances and reasonably attainable accuracies. The calculation of corrections for the temperature of the emergent stem is given in detail for various types of thermometers and conditions of use.
Date: February 12, 1965
Creator: Swindells, James F.
System: The UNT Digital Library
Automatic Indexing: A State-of-the-Art Report (open access)

Automatic Indexing: A State-of-the-Art Report

Report presenting a state-of-the-art survey of automatic indexing systems and experiments. It was conducted by the Research Information Center and Advisory Service on Information Processing, Information Technology Division, Institute for Applied Technology, National Bureau of Standards. Consideration is first given to indexes compiled by or with the aid of machines, including citation indexes. Advantages, disadvantages, and possibilities for modification and improvement are discussed. Experiments in automatic assignment indexing are summarized. Related research efforts in such areas as automatic classification and categorization, computer use of thesauri, statistical association techniques, and linguistic data processing are described. A major question is that of evaluation, particularly in view of evidence of human inter-indexer inconsistency. It is concluded that indexes based on words extracted from text are practical for many purposes today.
Date: March 30, 1965
Creator: Stevens, Mary Elizabeth
System: The UNT Digital Library