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 Decade: 1960-1969
 Year: 1965
 Serial/Series Title: National Bureau of Standards Reports
 Collection: Technical Report Archive and Image Library
Automatic Indexing: A State-of-the-Art Report

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

Date: March 30, 1965
Creator: Stevens, Mary Elizabeth
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
Calibration of Liquid-in-Glass Thermometers

Calibration of Liquid-in-Glass Thermometers

Date: February 12, 1965
Creator: Swindells, James F.
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
Effects of Thermal Shrinkage on Built-up Roofing

Effects of Thermal Shrinkage on Built-up Roofing

Date: March 4, 1965
Creator: Cullen, William C.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Ionospheric Radio Propagation

Ionospheric Radio Propagation

Date: April 1, 1965
Creator: Davies, Kenneth
Description: None
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
Oxidation of Polycyclic, Aromatic, Hydrocarbons: A Review of the Literature

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

Date: September 17, 1965
Creator: Tipson, R. Stuart
Description: 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.
Contributing Partner: UNT Libraries Government Documents Department
Spot Diagrams for the Prediction of Lens Performance From Design Data

Spot Diagrams for the Prediction of Lens Performance From Design Data

Date: September 7, 1965
Creator: Stavroudis, Orestes N.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Standard Cells: Their Construction, Maintenance, and Characteristics

Standard Cells: Their Construction, Maintenance, and Characteristics

Date: January 15, 1965
Creator: Hamer, Walter J.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
A Table of Radiation Characteristics for Uniformly Spaced Optimum Endfire Arrays with Equal Sidelobes

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

Date: December 10, 1965
Creator: Ma, M. T.
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Thermodynamic and Related Properties of Parahydrogen From the Triple Point to 100 K at Pressures to 340 Atmospheres

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

Date: August 10, 1965
Creator: Roder, H. M.
Description: None
Contributing Partner: UNT Libraries Government Documents Department