Serial/Series Title
States
Decade
Month
Language
526 Matching Results
Results open in a new window/tab.
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
Errata Sheet Number 1 for National Bureau of Standards Building Science Series 144, September 1983
Errata sheet for a report issued by the National Bureau of Standards containing corrections to be added to NBS Bulletin 144.
Date:
January 19, 1983
Creator:
Crenshaw, Richard & Clark, Roy E.
Object Type:
Report
System:
The UNT Digital Library
An Error Analysis for the Use of Presently Available Lunar Radio Flux Data in Broadbeam Antenna-System Measurements
From introduction: Simple, precise expressions for lunar diameter, average brightness temperature, flux density, and shape factor are presented. An analysis of the relationship between these parameters and corresponding errors are included. For broadbeam (HPBW>d) antennas, results show that flux density and shape factor can be determined with errors less than 13 percent and 0.4 percent respectively at frequencies below 10 GHz. Extension of the analysis to higher frequencies is indicated.
Date:
February 1984
Creator:
Daywitt, William C.
Object Type:
Report
System:
The UNT Digital Library
European Footwear Sizes
Description of the differences in European shoe sizes in comparison to American shoe sizes.
Date:
1948
Creator:
Hobbs, Robert B.
Object Type:
Report
System:
The UNT Digital Library
Evaluating the Impact of Securities Regulation on Venture Capital Markets
Report providing a detailed and analytical assessment of the economic techniques used by researchers to evaluate the efficiency of capital markets. The application of these techniques to that portion of the capital market which supplies venture funds to small, technology-based firms is emphasized. The primary elements of such analysis are the "efficient market ' hypothesis" and the "capital asset pricing model." The empirical analogue of the latter is commonly referred to as the market model."
Date:
June 1980
Creator:
Barth, James R.; Cordes, Joseph J. & Tassey, Gregory
Object Type:
Report
System:
The UNT Digital Library
Evaluating Thermal Fire Detection Systems: English Units
Abstract: This report presents a methodology for evaluating heat detection systems installed in buildings. Previous work for use primarily in designing new thermal fire detection systems was used as a starting point. The previous work was enhanced and supplemented to make it more useful for evaluating existing systems. The resulting equations were programmed into a user interactive computer program. This program is available in both BASIC and FORTRAN and will run on mainframes as well as personal computers. In addition, a modified version of the FORTRAN program was used to develop an extensive set of tables listing detector activation times for given building geometries, detector characteristics, and fire growth rates. These tables are useful for quick evaluation of alternative heat detector installations. Finally practical examples are included to illustrate the use of the tables and computer programs.
Date:
April 1986
Creator:
Stroup, David W.; Evans, David D. & Martin, Phyllis
Object Type:
Report
System:
The UNT Digital Library
Evaluating Thermal Fire Detection Systems: SI Units
Abstract: This report presents a methodology for evaluating heat detection systems installed in buildings. Previous work for use primarily in designing new thermal fire detection systems was used as a starting point. The previous work was enhanced and supplemented to make it more useful for evaluating existing systems. The resulting equations were programmed into a user interactive computer program.' This program is available in both BASIC and FORTRAN and will run on mainframe as well as personal computers. In addition, a modified version of the FORTRAN program was used to develop an extensive set of tables listing: detector activation times for given building geometries, detector characteristics, and fire growth rates. These tables are useful for quick evaluation of alternative heat detector installations. Finally, practical examples are included to illustrate the use of the tables and computer programs.
Date:
April 1986
Creator:
Stroup, David W.; Evans, David D. & Martin, Phyllis
Object Type:
Report
System:
The UNT Digital Library
Evaluation of Construction Loads in Multistory Concrete Buildings
Report issued by the National Bureau of Standards over construction loads of multistory concrete buildings. Evaluations of the construction loads are discussed. This report includes illustrations, and photographs.
Date:
February 1983
Creator:
Fattal, S. G.
Object Type:
Report
System:
The UNT Digital Library
An Evaluation of Thermal Energy Conservation Schemes for an Experimental Masonry Building
Report issued by the National Bureau of Standards over experiments conducted on a masonry building constructed inside an environmental chamber at the NBS. Different climactic conditions were simulated and the thermal response of the building was evaluated. This report includes tables, illustrations, and photographs.
Date:
July 1982
Creator:
Gujral, Parambir S.; Clark, Raymond J. & Burch, Douglas M.
Object Type:
Report
System:
The UNT Digital Library
Excitation of a TEM Cell by a Vertical Electric Hertzian Dipole
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 offering more flexibility of increasing the size of the test area to accommodate larger pieces of test equipment.
Date:
March 1981
Creator:
Wilson, Perry F.; Chang, David C. & Ma, Mark T.
Object Type:
Report
System:
The UNT Digital Library
An Experimental Study of Phase Variations in Line-of-Sight Microwave Transmissions
From Introduction: "The purpose of this report is to present an analysis of time variations in: (1) the phase (relative to a stable phase reference) if a 9414 Mc/s signal transmitted over this path, referred to hereafter as single-path phase data; (2) the phase observed at one receiving antenna relative to that observed at an adjacent antenna, referred to as phase difference data; (3) atmospheric refractivity as recorded by a microwave refractometer located at the Haleakala terminal; (4) the wind velocity at both ends of the path, and (5) surface atmospheric refractivity measured at 5 stations located on or near the path."
Date:
November 1, 1961
Creator:
Norton, K. A.; Herbstreit, J. W.; Janes, H. B.; Hornberg, K. O.; Peterson, C. F.; Barghausen, A. F. et al.
Object Type:
Report
System:
The UNT Digital Library
Experimental Transition Probabilities for Spectral Lines of Seventy Elements: Derived from the NBS Tables of Spectral-line Intensities
From introduction: "The goal of the work was to provide lists of the principal lines of the elements generally observed under ordinary conditions in arc spectra, together with their relative intensities on a true scale of relative energy."
Date:
July 20, 1962
Creator:
Corliss, Charles H. & Bozman, William R.
Object Type:
Report
System:
The UNT Digital Library
Expert Systems and Emergency Management: An Annotated Bibliography
Abstract: This report is the result of an in-depth review of the recent technical literature on expert systems,. The material contained in this report provided a basis for assessing the potential for using expert systems in emergency management operations. In choosing the material for inclusion in this report, special emphasis was placed on those aspects of expert systems which addressed the types of problems encountered in emergency management operations. The report is designed for use as a resource document and as a tutorial on expert systems and emergency management. Each chapter consists of a brief topic essay followed by a set of references which expand on the main themes of the essay.
Date:
November 1986
Creator:
Gass, Saul I.; Bhasker, Suneel & Chapman, Robert E.
Object Type:
Report
System:
The UNT Digital Library
Extension of Programs for Calculations of Great Circle Paths and Sunrise-Sunset Times
Modification of an earlier program to remove restrictions in calculating the short or long great circle path.
Date:
February 18, 1965
Creator:
Crary, J. H.
Object Type:
Report
System:
The UNT Digital Library
Facilities of the National Bureau of Standards
From forward: Every laboratory in this country is a valuable national resource. Along with the people who work in these facilities, U.S. laboratories constitute the basic foundation of this country's scientific and industrial strength. As the nation's foremost science and engineering measurement laboratory, the National Bureau of Standards has some of the premier research and testing facilities in the United States, and several of our laboratories are unequaled anywhere in the world. Bureau scientists and engineers use these special facilities to pursue the measurement-related work that U.S. science and industry need to grow and prosper. This brochure highlights only a small number of the special facilities available at NBS and provides information about their availability for collaborative or independent research and testing.
Date:
December 19, 1984
Creator:
United States. National Bureau of Standards.
Object Type:
Report
System:
The UNT Digital Library
Federal Government Certification Programs for Products and Services
Abstract: This directory presents information on 61 U.S. Government certification programs for products and services. Entries describe the scope and nature of each certification program, testing and inspection practices, standards used, methods of identification and enforcement, reciprocal recognition or acceptance of certification, and other relevant details. This directory is part of an ongoing NBS effort to establish and maintain a comprehensive database on standards, regulations, certification programs and related information. This material has bee. compiled to meet the needs of government, industry, and the public for information on U.S. Government certification programs in accordance with the requirements of the U.S. Trade Agreements Act of 1979.
Date:
April 1986
Creator:
Toth, Robert B.
Object Type:
Report
System:
The UNT Digital Library
Federal Laboratory Directory, 1982
Abstract: This Directory provides limited information about some 388 Federal laboratories with ten or more full-time professionals engaged in research and development. Summary data arranged by Federal agency and by State provide a broad overview of the Federal laboratory system. Laboratory lists by staff size, by State and by agency provide a cross reference. For each laboratory, a contact for obtaining technical information is given by name, address, and phone number. Major mission and major scientific or testing equipment is listed for each laboratory.
Date:
February 1983
Creator:
Wyckoff, James M.
Object Type:
Report
System:
The UNT Digital Library
Finline Diode Six-Port: Fundamentals and Design Information
Abstract: The preliminary design and testing of a planar circuit six-port with diode detectors is described. The planar circuit medium was chosen to be finline, and all preliminary work was done in WR-42 waveguide (18-26.5 GHz). The finline substrate was alumina, and initially commercial beam-lead diodes were bonded to the finline metalization. The goal is to design an integrated circuit which could be fabricated on one chip (with diode detectors) and used as part of a six port network analyzer in the waveguide bands above 18 GHz. Initial designs proved to b unsatisfactory because of high losses and reflections. Most of the problems have b en solved, and a usable integrated finline circuit is a good possibility for a millimeter wave six-port.
Date:
December 1985
Creator:
Weidman, Manly P.
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
Fire Tests of Precast Cellular Concrete Floors and Roofs
From Abstract: "The results of an investigation of lightweight, precast cellular concrete planks are given. Fire tests were made of two floor and five roof specimens made up of these planks. Variables, included density of the cellular concrete, thickness and span of the planks, reinforcement, and cover for the latter."
Date:
April 12, 1962
Creator:
Ryan, J. V. & Bender, E. W.
Object Type:
Report
System:
The UNT Digital Library
The First Spectrum of Hafnium (HF I)
Report continuing W. K. Meggers' previous analysis in LS-coupling. This coupling is not rigorous in Hf I, and many intervals are irregular. Consequently, the levels are given also in numerical order with the even and odd levels presented in separate tables. The long line lists are given in two Appendices: Appendix A contains the observed Zeeman data for the individual lines, 531 in all; Appendix B consists of the complete line list of observed and classified lines. By far the greater part of the analysis is that of Meggers.
Date:
July 1976
Creator:
Meggers, William F. & Moore, Charlotte E.
Object Type:
Report
System:
The UNT Digital Library
Fitness-for-Service Criteria for Assessing the Significance of Fatigue Cracks in Offshore Structure
Abstract: Results of a research program to develop fitness-for-service criteria for assessing the significance of fatigue cracks in offshore structures are presented in five papers. Each paper describes the goals and approaches to a specific task and details the results of the study.
Date:
August 1985
Creator:
Cheng, Yi-Wen
Object Type:
Report
System:
The UNT Digital Library
Formulas, Tables and Curves for Computing the Mutual Inductance of Two Coaxial Circles
Scientific paper issued by the Bureau of Standards over the mutual inductance of two coaxial circles. As stated in the abstract, "a number of examples are given to show the methods of computation by the different formulas, tables, and charts" (p. 541). This paper includes tables, and illustrations.
Date:
August 5, 1924
Creator:
Curtis, Harvey L. & Sparks, C. Matilda
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