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Automated Measurement of Frequency Response of Frequency-Modulated Generators Using the Bessel Null Method

Description: From abstract: This paper describes a Bessel null technique to measure the frequency response of a frequency-modulated rf carrier and a program to automate frequency response measurements of signal generators with output frequencies from 0.450 to 2000 MHz. The measurements obtained using this technique are more precise than those obtained by a highly trained technician using a manual system.
Date: March 1986
Creator: Major, J. R.; Livingston, E. M. & Adair, Robert T.
Partner: UNT Libraries Government Documents Department
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Automatic Indexing: A State-of-the-Art Report

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. Experimen… more
Date: March 30, 1965
Creator: Stevens, Mary Elizabeth
Partner: UNT Libraries Government Documents Department
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Calibration Procedures for Direct-Current Resistance Apparatus

Description: From Object and Scope of This Paper: "This paper describes the apparatus and procedures used at the National Bureau of Standards for the measurement of d-c resistance when an accuracy of a few parts in a million is required. The object will be to explain procedures in detail and as simply as possible, with a minimum reference to theory."
Date: March 1, 1962
Creator: Brooks, Paul P. B.
Partner: UNT Libraries Government Documents Department
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Conductive Flooring for Hospital Operating Rooms

Description: Report issued by the Bureau of Standards over studies on the importance of conductive flooring in hospitals. Types of conductive flooring are compared, and tested. The methods and results are presented, and discussed. This report includes tables, illustrations, and photographs.
Date: March 21, 1960
Creator: Boone, Thomas H.; Hermach, Francis L.; MacArthur, Edgar H. & McAuliff, Rita C.
Partner: UNT Libraries Government Documents Department
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Creep and Drying Shrinkage of Lightweight and Normal-Weight Concretes

Description: From Scope of Investigation: "The work reported here is part of a continuing program concerning the long-term volume changes in concretes made from lightweight and normal-weight aggregates. The creep, drying-shrinkage, and strength data presented are for concretes made with 24 expanded shale lightweight aggregates and 5 natural, normal-weight aggregates. These aggregates were from widely separated geographical locations and were to be representative samples of aggregates being used in the produ… more
Date: March 4, 1964
Creator: Reichard, T. W.
Partner: UNT Libraries Government Documents Department
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A Daylighting Model for Building Energy Simulation

Description: Report issued by the National Bureau of Standards over the energy performance of a day-lighted building. The different models and functions are discussed. This report includes tables, graphs, illustrations, and photographs.
Date: March 1983
Creator: Gillette, Gary
Partner: UNT Libraries Government Documents Department
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Development of High-Temperature Strain Gages

Description: From Introduction: "An improved high-temperature gage was needed, and in an attempt to fill this need an investigation was initiated in February 1954 in the Enameled Metals Laboratory at the National Bureau of Standards. The present Monograph constitutes a final summary on this program."
Date: March 17, 1961
Creator: Pitts, J. W. & Moore, D. G.
Partner: UNT Libraries Government Documents Department
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Effects of Thermal Shrinkage on Built-up Roofing

Description: 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.
Partner: UNT Libraries Government Documents Department
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Electrical Properties of Materials and Their Measurement at Low Temperatures

Description: Abstract: A review is given of the electrical resistance of materials at cryogenic temperatures. Measurement techniques, the data base, and uses of the data are presented. The emphasis is on metals and alloys of technological importance; a toxic which covers a large range of materials. Similarly, the treatment of theory and of measurement techniques is primarily for the user interested in the more practical aspects of the subject. In every instance, however, references are given which allow the… more
Date: March 1982
Creator: Fickett, F. R.
Partner: UNT Libraries Government Documents Department
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Energy Dispersive X-Ray Spectrometry

Description: Abstract: Energy-dispersive x-ray analysis with gas proportional detectors has been used widely in x-ray spectrochemical analysis. It was particularly useful in the detection of low-energy x-ray emission, before the commercial availability of the Blodgett-Langmuir pseudocrystals. With the development of solid-state x-ray detectors of high resolution, and improvement in associated electronics and computers, the interest in energy-dispersive x-ray analysis has increased enormously, to the point w… more
Date: March 1981
Creator: Heinrich, Kurt F. J.; Newbury, Dale E.; Myklebust, R. L. & Fiori, C. E.
Partner: UNT Libraries Government Documents Department
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Excitation of a TEM Cell by a Vertical Electric Hertzian Dipole

Description: From abstract: The excitation of a transverse electromagnetic (TEM) cell by a vertical electric Hertzian dipole is analyzed where the gap between the septum and side wall is assumed to be small. Approximate expressions for the field distribution and characteristic impedance are derived. These expressions are numerically evaluated for some typical geometries, and good agreement with previously published results is shown. The formation also allows a vertical offset for the septum position, thus o… more
Date: March 1981
Creator: Wilson, Perry F.; Chang, David C. & Ma, Mark T.
Partner: UNT Libraries Government Documents Department
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A High-Dispersion Spectral Analysis of the Ba II Star HD 204075 (ζ Capricorni)

Description: Report discussing a double differential curve of growth analysis for the Ba II star S Capricorni. Both the sun and � Virginis (G9 II-III) were used as comparison stars. The observational material consists of equivalent widths, central depths, and half-widths for 1100 spectral lines measured on direct-intensity tracings of plates obtained by J. L. Greenstein at the coude focus of the 200-in telescope. The plates cover the spectral regions 3880-4825 A and 5100-6720 A at reciprocal dispersions of … more
Date: March 1971
Creator: Tech, Jack L.
Partner: UNT Libraries Government Documents Department
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Mechanical Behavior of Crystalline Solids: Proceedings of a Symposium, April 28-29, 1962

Description: From Introduction: "These first three chapters from a background of introduction and general ideas about dislocations. The next two chapters are concerned specifically with properties of ceramic materials, with emphasis on single crystals."
Date: March 25, 1963
Creator: United States. Bureau of Standards.
Partner: UNT Libraries Government Documents Department
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Report of the Thirty-Seventh National Conference on Weights and Measures, 1952

Description: Report of the annual conference on weights and measures, hosted by the U.S. National Bureau of Standards in Washington D.C. It includes conference proceedings, a list of attendees, information about committees and officers, and other reports or commentaries discussed at the meetings.
Date: March 19, 1953
Creator: United States. National Bureau of Standards.
Partner: UNT Libraries Government Documents Department
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NBS Papers on Underground Corrosion of Steel Piling, 1962-1971

Description: From Introduction: "In this paper are presented the results obtained to date from the inspections of steel pilings. The investigation will be continued by additional inspections of pilings in other parts of the country in order to cover a winder range of soil environments."
Date: March 1972
Creator: Schwerdtfeger, W. J & Romanoff, Melvin
Partner: UNT Libraries Government Documents Department
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Oscillator Strengths and Transition Probabilities fro 3288 Lines of Fe I

Description: Report of a homogeneous set of intensity-related data calculated for 3288 spectral lines of Fe I in the region from 2100 to 9900 angstroms. The quantities tabulated in the present monograph include log (g__), log (gf), gf,f,gA, and A. Since recent investigations do not support excitations corrections in the case of Fe I and certain other spectra, the present tabulation incorporates a removal of that normalization function. This recalculation affects the values for all lines whose upper energy l… more
Date: March 1968
Creator: Corliss, C. H. & Tech, J. L
Partner: UNT Libraries Government Documents Department
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Possible Estimation Methodologies for Electromagnetic Field Distributions in Complex Environments

Description: Abstract: The problem of measuring and characterizing complicated multiple-source, multiple-frequency electromagnetic environments is becoming more important and more difficult as electrical devices proliferate. This paper outlines three general approaches to the problem which are currently under investigation at the National Bureau of Standards. The three approaches are: 1) a statistical treatment of the spatial distribution of electromagnetic field intensities, 2) a numerical computation usin… more
Date: March 1985
Creator: Kanda, Motohisa; Randa, J. & Nahman, N. S.
Partner: UNT Libraries Government Documents Department
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Properties of High-Temperature Ceramics and Cermets: Elasticity and Density at Room Temperature

Description: From Introduction: "The present paper contains detailed descriptions of the methods used in calculating both the elastic constants and the statistical parameters. These detailed descriptions have been included for two reasons: (1) To leave no doubt as to the exact procedure, and (2) to act as a guide to other workers who might wish to make similar determinations."
Date: March 1, 1960
Creator: Lang, S. M.
Partner: UNT Libraries Government Documents Department
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Radio Meteorology

Description: Report compiling the work done in radio meteorology over the past ten years at the National Bureau of Standards' Central Radio Propagation Laboratory (CRPL). There is an emphasis upon the effects of the lower atmosphere on the propagation of radio waves. The CRPL group has concentrated upon the refraction of radio waves as well as the refractive index structure of the lower atmosphere on both synoptic and climatic scales. Additional chapters on radio-meteorological parameters and the absorption… more
Date: March 1, 1966
Creator: Bean, B. R. & Dutton, E. J.
Partner: UNT Libraries Government Documents Department
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Research and Development in the Computer and Information Sciences: [Part] 1. Information Acquistion, Sensing, and Input: A Selective Literature Review

Description: From Introduction: "This report is the first of a series intended to provide a selective overview of research and development efforts and requirements in the somewhat overlapping fields of the computer and information sciences and technologies. The projected series of reports will attempt to outline the probable range of R & D activities in the computer and information sciences and technologies through selective reviews of the literature and to develop a reasonable consensus with respect to the… more
Date: March 1970
Creator: Stevens, Mary Elizabeth
Partner: UNT Libraries Government Documents Department
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Standard Test Specimens of Zinc Bronze (Cu 88, Sn 10, Zn 2) - Parts 1 and 2: Part 1. - Preparation of Specifications, Part II. - Microstructure

Description: Technical paper issued by the Bureau of Standards over tests conducted on the preparation of an alloy. The tests conducted, and their results are presented and discussed. This paper includes tables, illustrations, and photographs.
Date: March 15, 1916
Creator: Karr, C. P. & Rawdon, Henry S.
Partner: UNT Libraries Government Documents Department
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Standard X-ray Diffraction Powder Patterns: Section 1. Data for 46 Substances

Description: Report documenting standard x-ray diffraction powder patterns for various compounds, intended to replace previous data or provide information for new substances. It describes the methods and, for each substance, outlines any previous data as well as information about the sample used and structural data, with a table of diffraction patterns.
Date: March 9, 1962
Creator: Swanson, Howard E.; Morris, M. C.; Stinchfield, Roger P. & Evans, Eloise H.
Partner: UNT Libraries Government Documents Department
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