Textbook on mechanized information retrieval

Textbook on mechanized information retrieval

BOOK NOTES 524 alternative methods are described particularly those which represent improvements on the older methods. The three parts of the book a...

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BOOK NOTES

524

alternative methods are described particularly those which represent improvements on the older methods. The three parts of the book are: (1) The Elements Carbon and Hydrogen, Oxygen, Nitrogen, the Halogens and Sulphur; (2) Metals, Non-Metals and Some of the Less Common Elements (such as niobium, tantalum, uranium); and (3) Microgram Analysis (for example, the Unterzaucher method, the diffusion method, the Kirsten-Dumas method). Two appendices cover preparation of samples and standard solutions; one contains reference substances and microanalytical

reagents.

PROGRESSIN DIELECTRICS,VOL. 4, edited by J. B. Birks and J. Hart. 309 pages, diagrams, illustrations, 6 x 91 in. New York, Academic Press Inc., 1962. Price, $12.00. The six contributions

comprising

Volume

4

of this series are equally divided between science and technology. The first four articles deal with subjects not previously considered in the series; the fifth is a sequel to one on the same subject appearing in Vol. 1; the final paper is a comprehensive review of one of the oldest of dielectric phenomena. The papers are “Microwave Spectroscopy of Gases,” by J. Sheridan; “Dispersion and Absorption of Microwaves in Gases and Liquids,” by K. H. Illinger; “Ferroelectricof Gas Breakity,” by W. J. Merz; “Theory down,” by T. W. Dakin and D. Berg; “Conduction and Breakdown in Liquid Dielectrics,” by A. H. Sharbaugh and P. K. Watson; and “Static Electrification,” by L. B. Loeb.

TEXTBOOK ON MECHANIZED INFORMATION RETRIEVAL,by Allen Kent. 268 pages, diagrams, New York, John illustrations, 6 x 9 in. Wiley & Sons, Inc., 1962. Price, $9.50. Designed for classroom use as well as selfstudy, this book gives a systematic introduction to the basic principles and techniques of machine literature searching. After an introductory chapter defining the problem, the text is divided covering: physical tools into seven chapters, (punch cards, computer systems, paper tape, etc.); principles of analysis (indexing, classifying, abstracting, processing of full texts); prin-

[J.F.I.

ciples of searching; manipulation of searching devices both for search-ready systems and machine-searchable systems; words, language, and meaning in retrieval systems; codes and notations; and systems design criteria.

INTRODUCTIONTO LINEAR SYSTEMSANALYSIS, by Robert Grover Brown and James William Nilsson. 403 pages, diagrams, 6 x 9 in. New York, John Wiley & Sons, Inc., 1962. Price, $10.50. This text is intended for use at the advanced undergraduate or beginning graduate level, for all students in engineering and the physical sciences. Prerequisites are undergraduate physics and mathematics, including differential equations. Emphasis is on the application of Laplace and Fourier methods to physical problems, especially to electrical engineering problems. Part I deals with systems in which driving functions or inputs are known functions of time; Part II covers systems whose inputs are random or noiselike in character.

RARE EARTH RESEARCH, edited by Joseph F. Nachman and Charles E. Lundin. 354 pages, diagrams, 6 x 9 in. New York, Gordon and Breach, Inc.. 1962. Price, $14.50. These are the Proceedings of the Second Conference on Rare Earth Research sponsored by The Metallurgy Division, Denver Research Institute, University of Denver, held during September, 1961. Fifty-nine scientists and engineers have contributed a total of thirty papers that report and evaluate important current research in the field of rare-earth and related metals, their compounds and alloys. The chemical, physical and the metallurgical aspects of the subject are covered. The book is divided into five separate sections. Part I: Chemical Properties of the Rare Earths and Their Compounds. Part II: Mechanical and Metallurgical Properties of Rare-Earth Metals and Alloys. Part III: Thermodynamic Properties of RareEarth Metals, Alloys, and Compounds. Part IV: Physical Properties of Rare-Earth Metals Part V: Rare-Earth and Their Compounds. Chalcogens, Borides, and Nitrides.