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151 Matching Results
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Influence of a Sector Ground Screen on the Field of a Vertical Antenna
Report show the field of a short vertical antenna on a homogeneous ground is modified by the presence of a metallic screen. The screen is taken in the form of a circular disk and a concentric sector. The modification of the field is expressed in the form of surface integrals over the disk and the sector. Extensive numerical results for these basic integrals are given and a number of applications are illustrated.
Date:
April 15, 1963
Creator:
Wait, James R. & Walters, Lillie C.
Object Type:
Report
System:
The UNT Digital Library
Tensile and Impact Properties of Selected Materials From 20 to 300 ºK
Report giving the tensile and impact properties of structural materials that were experimentally determined at temperatures from 20 to 300 ºK. Tensile properties of a few materials were also determined at 4 ºK. The properties experimentally determined were the yield strength, tensile strength, elongation, and reduction of area, the stress versus strain curve, and the impact energy. The test equipment and procedures are described. The individual data are presented in tables, and the average results are displayed in graphs.
Date:
June 28, 1963
Creator:
Warren, K. A. & Reed, R. P.
Object Type:
Report
System:
The UNT Digital Library
Infrared Spectroscopy of Carbohydrates: A Review of the Literature
Report presenting of survey of the literature on the infrared spectroscopy of carbohydrates in order to assemble and systematize information in this field. Discusses principles and instrumentation, sampling techniques, comparison of samples, and the interpretation of the spectra. In addition, examples are discussed of the use of infrared spectra for qualitative and quantitative purposes and in the determination of structure. Special techniques are briefly described.
Date:
June 1968
Creator:
Tipson, R. Stuart
Object Type:
Report
System:
The UNT Digital Library
An Introduction to the Description and Evaluation of Microwave Systems Using Terminal Invariant Parameters
Report presenting the technical background and basis for a new method of evaluating certain performance parameters which are common to all microwave systems. A unique feature of the new measurement concept is its elimination of the precision waveguide and connector requirements for an important class of measurement problems.
Date:
October 1969
Creator:
Engen, Glenn F.
Object Type:
Report
System:
The UNT Digital Library
Bibliography on Molecular and Crystal Structure Models
Report that briefly describes many of the models of crystal and molecular structures which have appeared in the literature, and presents a bibliography of the publications, grouped according to model types, which describe the models in more detail.
Date:
May 20, 1960
Creator:
Smith, Deane K.
Object Type:
Report
System:
The UNT Digital Library
Acid-Base Behavior in Aprotic Organica Solvents
Report presenting the National Bureau of Standards' research program designed to determine and explain acid-base behavior in aprotic organic solvents and to develop methods and reference materials for determining total acid and base content and relative strengths of acids and bases in the media.
Date:
August 1968
Creator:
Davis, Marion Maclean
Object Type:
Report
System:
The UNT Digital Library
Acceleration Due to Gravity at the National Bureau of Standards
Report describing the determination of the absolute value of the acceleration due to gravity at the National Bureau of Standards.
Date:
June 1968
Creator:
Tate, Douglas Roy
Object Type:
Report
System:
The UNT Digital Library