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Theory of Determination of Ultra-Radio Frequencies by Standing Waves on Wires
Scientific paper issued by the Bureau of Standards over ultra-radio frequencies. As stated in the abstract, "this paper furnishes the theoretical background for the method of frequency standardization employing short standing waves on parallel wires" (p. 487). This paper includes tables, and illustrations.
Date:
June 23, 1924
Creator:
Hund, August
Object Type:
Report
System:
The UNT Digital Library
Radio-Frequency Resistance and Inductance of Coils Used in Broadcast Reception
Technical paper issued by the Bureau of Standards over radio-frequency resistance in radio reception. As stated in the introduction, "the purpose of this paper is to present data on the radio-frequency resistance and inductance of coils within the range of frequencies used in radiotelephone broadcasting" (p. 651). This paper includes tables, and illustrations.
Date:
October 22, 1925
Creator:
Hund, August & De Groot, H. B.
Object Type:
Report
System:
The UNT Digital Library
Calibration of Temperature Measurement Systems Installed in Buildings
Report issued by the National Bureau of Standards over calibration of thermometers for accurate temperature measurements in buildings. Methods of on-site calibration are discussed. This report includes graphs, and illustrations.
Date:
January 1984
Creator:
Hurley, C. Warren & Schooley, James F.
Object Type:
Report
System:
The UNT Digital Library
General Guidelines for the On-Site Calibration of Humidity and Moisture Control Systems in Buildings
Report issued by the National Bureau of Standards over calibration of indoor humidity and moisture control. Guidelines used for on-site calibration are discussed. This report includes tables, graphs, and illustrations.
Date:
September 1983
Creator:
Hyland, Richard W. & Hurley, C. Warren
Object Type:
Report
System:
The UNT Digital Library
Fire Tests of Building Columns
Technical paper issued by the Bureau of Mines over studies conducted on fire resistance on building columns. As stated in the introduction, "the purpose of this investigation is to ascertain (1) the ultimate resistance against fire, of protected and unprotected columns as used in the interior of buildings; (2) their resistance against impact and sudden cooling from hose streams when in a highly heated condition" (p. 12). This paper includes tables, illustrations.
Date:
April 21, 1921
Creator:
Ingberg, S. H.; Griffin, H. K.; Robinson, W. C. & Wilson, R. E.
Object Type:
Report
System:
The UNT Digital Library
Construction and Applications of Conformal Maps. Proceedings of a Symposium Held on June 22-25, 1949, at the Institute for Numerical Analysis of the National Bureau of Standards at the University of California, Los Angeles
Report presented on the topic of conformal mapping and the use of equations in machines. 32 topics from a symposium are provided.
Date:
1952
Creator:
Institute for Numerical Analysis (U.S.)
Object Type:
Report
System:
The UNT Digital Library
Analytical Standards for Trace Elements in Petroleum Products
Report discussing a search conducted for stable, oil-soluble, organic compounds of metals (and other elements) for use in the spectrographic analysis of petroleum products. Compounds having suitable physical properties have been selected as standards. Methods are given for preparation of the compounds and for the spectrographic and chemical analysis of the chosen standards. Procedures are described for the preparation of stable solutions thereof in petroleum oils.
Date:
October 1, 1962
Creator:
Isbell, H. S.; Tipson, R. Stuart; Hague, J. L.; Scribner, B. F.; Smith, W. Harold; Wade, Clarence W. R. et al.
Object Type:
Report
System:
The UNT Digital Library
Equilibrium in the System: Lead Acetate, Lead Oxide, and Water, at 25⁰
Report issued by the Bureau of Standards over studies on basic acetates and their importance as an effective clarifying agent. The analytical procedures and the results of the studies are discussed. This report includes tables, and illustrations.
Date:
1915
Creator:
Jackson, Richard F.
Object Type:
Report
System:
The UNT Digital Library
Single-Phase Transfer of Liquefied Gases
Report examining the problems of handling liquefied gases and discusses the feasibility of transporting them through piping systems.
Date:
December 1, 1958
Creator:
Jacobs, Robert B.
Object Type:
Report
System:
The UNT Digital Library
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.
Object Type:
Report
System:
The UNT Digital Library
Construction of a Flashlamp-Pumped Dye Laser and an Acousto-Optik Modulator for Mode-Locking
Design of a flashlamp-pumped dye laser capable of emitting light pulses 500 ns wide with a risetime of 300 ns.
Date:
July 1971
Creator:
Jennings, D. A.
Object Type:
Report
System:
The UNT Digital Library
From Sundials to Atomic Clocks: Understanding Time and Frequency
Book presenting an introduction to time, timekeeping, and the uses of time information, especially in the scientific and technical areas. Serves as introductory text for laymen.
Date:
December 1977
Creator:
Jespersen, James & Fitz-Randolph, Jane
Object Type:
Book
System:
The UNT Digital Library
Precise Measurement of Heat of Combustion with a Bomb Calorimeter
From Introduction: "This Monograph describes methods and apparatus used at the National Bureau of Standards in connection with several series of investigations of heats of combustion of aircraft fuels [4, 5, 6, 7]."
Date:
February 26, 1960
Creator:
Jessup, R. S.
Object Type:
Report
System:
The UNT Digital Library
A Complete Mode Sum for LF, VLF, ELF Terrestrial Radio Wave Fields
Report discussing the VLF, ELF propagation in the earth-ionosphere waveguide emphasizing the total field found by summing all modes which contribute appreciably. Solutions are given and calculations are made for a homogeneous isotropic ionosphere, a homogeneous ionosphere with a constant radial magnetic field imposed, and an ionosphere with a magnetic field of arbitrary dip angle.
Date:
October 1, 1964
Creator:
Johler, J. Ralph & Berry, Leslie A.
Object Type:
Report
System:
The UNT Digital Library
Science and Technology: the Challenges of the Future
Preface: On its 80th anniversary, the National Bureau of Standards hosted a series of lectures by six distinguished speakers of national and international note who discussed the challenges facing science and technology and, thus, the Bureau in the coming years. This publication contains the texts of these presentations, along with transcripts of the question-and answer sessions following the presentations. The lecture series was organized by Dr. Donald R. Johnson of NBS with the very able assistance of Mrs. Carol Shipley in making arrangements for speakers and handling the manuscripts. The staff of the NML Text Editing Facility are acknowledged for their substantial contributions of typing and editing support.
Date:
May 1982
Creator:
Johnson, Donald R.
Object Type:
Report
System:
The UNT Digital Library
Beam-Profile Measurement of Laser Pulses Using a Spatial Filter to Sample the Hermite Modes of a String of Pulses
Abstract: As a first step in the development of a beam-profile measuring instrument for laser sources that is capable of determining the distribution of low-order (less than 25) Hermitian modes in a series of laser pulses, I designed and evaluated the three key parts of such an instrument. First, there is the telescope system which allows the incident laser beam to be phase, beamwidth, and beam center matched to the optical spatial filter. Second, there is a brief error analysis of the structure of the mismatch function between the beam out of the telescope and that expected by the filter. Finally, there is the detailed analysis and design of the computer-generated spatial filter that will cause the incident-laser beam to be cross correlated with the low-order Hermite modes and will create an array of light spots in the detector (Fourier transform) plane each of which can be uniquely related to a particular Hermite mode of the original laser pulse. The principal conclusion is that the Hermite mode analysis can be done with better than 99 percent separation between modes, provided the phase between modes is uncorrelated from pulse to pulse when the filter has been fabricated with a two-level, gray-scale …
Date:
September 1982
Creator:
Johnson, Eric Gunnar, Jr.
Object Type:
Report
System:
The UNT Digital Library
Direct Measurement of the Electric Field of a Laser Pulse--Theory
From abstract: This paper presents the conflicts in the design and gives a solution. The complete evaluation requires assembly of the proposed apparatus to assess final accuracy.
Date:
August 1985
Creator:
Johnson, Eric Gunnar, Jr.
Object Type:
Report
System:
The UNT Digital Library
The Measurement of Lumped Parameter Impedance: A Metrology Guide
Scope of the Guide: "This guide is not all-inclusive of the subject of impedance measurement and the reader should understand at the outset what he can or cannot expect to find. To help in establishing the bounds of subject matter included, consider the ideal impedance-measuring instrument as having the following the characteristics and capabilities: (1) unrestricted frequency range (2) unrestricted impedance range (3) unrestricted capabilities with respect to bias, ambience, applied power, etc. (4) error free (5) performs measurements instantaneously (6) zero acquisition cost (7) zero operating cost."
Date:
June 1974
Creator:
Jones, R. N. & Anson, W. J.
Object Type:
Report
System:
The UNT Digital Library
Calibration of Line Standards of Length and Measuring Tapes at the National Bureau of Standards
From Abstract: "The methods used at the National Bureau of Standards in calibrating line standards of length and measuring tapes submitted for standardization are outlined. The equipment used is described briefly. There is a discussion of some considerations that should be given as to whether or not a standard should be submitted to the Bureau."
Date:
May 20, 1960
Creator:
Judson, Lewis V.
Object Type:
Report
System:
The UNT Digital Library
An Electric and Magnetic Field Sensor for Simultaneous Electromagnetic Near-Field Measurements -- Theory
Abstract: This paper describes the theory of a single sensor to perform simultaneous electric and magnetic near-field measurements. The theory indicates that it is possible to obtain the magnetic-loop and electric-dipole currents using a loop terminated with identical loads at diametrically opposite points. The theory also indicates that it is possible to obtain an ideal load impedance for achieving equal electric and magnetic field responses of the loop. Preliminary experiments have been performed using plane waves to verify these results. Key words: electric field, electromagnetic interference, electromagnetic radiation, loop, magnetic field, near fields.
Date:
April 1983
Creator:
Kanda, Motohisa
Object Type:
Report
System:
The UNT Digital Library
A Radio-Frequency Power Delivery System: Procedures for Error Analysis and Self-Calibration
Abstract: An expression is developed for net power delivered to a load in terms of the indicated forward and reflected power and the system S-parameters and reflection coefficients. The dual directional coupler is treated as nonideal with power reflections assumed between all ports. The system itself is used to evaluate the major S-parameter terms in net power computation, and uncertainty in the computed power is derived from origins in the power meter readings and incompletely known S-parameters.
Date:
August 1985
Creator:
Kanda, Motohisa & Orr, R. David
Object Type:
Report
System:
The UNT Digital Library
Possible Estimation Methodologies for Electromagnetic Field Distributions in Complex Environments
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 using a finite-difference (or lattice) form of the electromagnetic action functional, and 3) use of a directional probe to scan a volume. All three methods are still in the development stage, but each appears promising.
Date:
March 1985
Creator:
Kanda, Motohisa; Randa, J. & Nahman, N. S.
Object Type:
Report
System:
The UNT Digital Library
Low-Voltage Room Thermostat Performance
Report issued by the National Bureau of Standards over low voltage electric thermostats. Thermostat test results are discussed. This report includes illustrations, and photographs.
Date:
April 1983
Creator:
Kao, James Y.; Sushinsky, George; Didion, David A.; Mastascusa, E. J. & Chi, Joseph
Object Type:
Report
System:
The UNT Digital Library
Standard Test Specimens of Zinc Bronze (Cu 88, Sn 10, Zn 2) - Parts 1 and 2: Part 1. - Preparation of Specifications, Part II. - Microstructure
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.
Object Type:
Report
System:
The UNT Digital Library