Technical Report Archive & Image Library (TRAIL) - 526 Matching Results
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- Specific Heat of Copper in the Interval 0⁰ to 50⁰ Celsius with a Note on Vacuum-Jacketed Calorimeters
- Report issued by the Bureau of Standards over studies on the specific heat of copper. The methods and equipment used for the studies are discussed. This report includes tables, photographs, and illustrations.
- Specific Heats and Enthalpies of Technical Solids at Low Temperatures: A Compilation from the Literature
- Report giving tables of the specific heat, cp, and the enthalpy of 28 metals, 3 alloys, 8 other inorganic substances, and 8 organic substances in the temperature range, 1º to 300º K.
- A Spectrophotometric Atlas of the Spectrum of CH from 3000A to 5000A
- Report of the near ultraviolet and visible emission spectrum of CH presented in the form of a spectrophotometric atlas. The spectrum was recorded photoelectrically from an acetylene-oxygen flame in the region 4900 to 3000 A by use of a high-resolution grating monochromator. Each of the lines in the CH spectrum is identified.
- Spot Diagrams for the Prediction of Lens Performance From Design Data
- From Abstract: "This Monograph presents an outline of the methods used at the National Bureau of Standards to predict the performance of lenses from an analysis of their designs. The technique is based on the use of spot diagrams, which are analogs of star image tests, and makes extensive use of high-speed digital computers."
- Stabilization of Free Radicals at Low Temperatures: Summary of the NBS Program
- From Forward: "Although the first paper in this volume describes the general aspects of the technical management of the program, it is important to emphasize that much of success and productivity of this program stemmed from the sympathetic understanding of its basic viewpoint by both the Department of Defense and the National Bureau of Standards."
- Standard Cells: Their Construction, Maintenance, and Characteristics
- From Abstract: "This Monograph contains information on the construction, maintenance, and characteristics of standard cells. The effects of temperature, pressure, electric current, light, shock, and vibration on standard cells are discussed."
- Standard Reference Data Publications, 1964-1984
- Abstract: The National Bureau of Standards' Office of Standard Reference Data manages a network of data centers that prepare evaluated data bases of physical and chemical properties of substances. Data bases are available in printed form, on magnetic tapes and through on-line computer networks. This document provides a comprehensive list of the products available from the National Standard Reference Data System (NSRDS) for the years 1964-1984, including indexes qualified by author, material, and property terms. Ordering information and current prices can be found at the end of this document.
- Standard Reference Data Publications, 1985-1986
- Abstract: The National Bureau of Standards' Office of Standard Reference Data manages a network of data centers that prepare evaluated databases of physical and chemical properties of substances. Databases are available in printed form, on magnetic tapes, diskettes, and through on-line computer networks. This document provides a comprehensive list of the products available from the National Standard Reference Data System (NSRDS) for the years 1985-1986, including indexes qualified by author, material, and property terms. Ordering information and current prices can be found at the end of this document.
- 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.
- Standard Time Zones of the United States and adjacent Parts of Canada and Mexico as of October 1, 1935
- One map showing standard time zones of the United States as of October 1, 1935, with an updated map showing new boundaries in Georgia, Ohio, and Michigan. Notes on the first map describe the changes effective September 27, 1936 and November 23, 1941.
- Standard X-ray Diffraction Powder Patterns: Section 1. Data for 46 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 2. Data for 37 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 3. Data for 51 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 4. Data for 103 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 5. Data for 80 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 6. Data for 60 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 7. Data for 81 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 8. Data for 81 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 9. Data for 63 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 10. Data for 84 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 11. Data for 70 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 12. Data for 57 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 13. Data for 58 substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 14. Data for 68 substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 15. Data for 112 substances
- 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.
- Standard X-ray Diffraction Powder Patterns : Section 16. Data for 86 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 17. Data for 54 Substances
- 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.
- Standard X-ray Diffraction Powder Patterns: Section 18. Data for 58 Substances
- 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.
- Standards and Metadata Requirements for Computerization of Selected Mechanical Properties of Metallic Materials
- Abstract: To assist in building a computerized information system on the engineering properties of materials, the standards and metadata requirements for a representative group of mechanical property categories are considered. These categories include: tensile behavior, hardness numbers, notch-bar impact test parameters, and fatigue properties. For each property group, definitions of terms, synonyms (and non-synonyms), standard test methods, standards for reporting data, precision and accuracy, and correlations of properties are addressed. The principal findings and recommendations are as follows. Existing test methods are generally adequate for the properties considered, but better standards are needed for data reporting. Appraisal of materials variability and testing machine variability would be assisted by access to standard reference materials, certified as to their mechanical properties. All properties considered for inclusion in a computerized system can be categorized as parameters for direct search, parameters retrievable with extraction of all data stored for a given material, and parameters which are derived from an analytical representation of experimental data. Drafting of some general standards on computerized file structures and metadata files suitable for the engineering field is advised.
- Standards and Specifications for Metals and Metal Products
- Nationally recognized standards and specifications for ores, metals, and manufactures except machinery, vehicles, and electrical supplies.
- Standards and Specifications for Nonmetallic Minerals and Their Products
- Collection and publishing of the substance of the standards and specifications relating to nonmetallic minerals and manufactures thereof.
- Standards Committee Activities of the National Bureau of Standards: 1980 Highlights
- From abstract: This report summarizes NBS standards committee activities during calendar year 1980. It contains highlights of significant technical and individual contributions made by NBS staff, a description of NBS standards management and information activities, and a directory of standards committees on which NBS staff serve. (Supersedes NBS Special Publication 573 (March 1980)).
- Standards Committee Activities of the National Bureau of Standards: 1982 Highlights
- Abstract: This report summarizes NBS standards committee activities and accomplishments during, calendar year 1982. It describes the management of standards activities at NBS, profiles NBS staf* participation on outside standards committees, and highlights significant technical and individual contributions made by NBS staff. In 1982, 457 staff members (or 29% of NBS' professional, scientific, and technical staff) participated in 1,046 outside standards committees of 97 national and international standards organizations.
- Standards Committee Activities of the National Bureau of Standards: 1983 Highlights
- Abstract: This report summarizes NBS standards committee activities and accomplishments during calendar year 1983. It profiles NBS state participation on outside standards committees and highlights significant technical and individual contributions made by NBS staff. In 1983, 446 staff members (or 28% of NBS' professionals, scientific, and technical staff) participated in 989 standards committees of 87 national and international standards organizations.
- Standards Yearbook 1932
- Outlines of the activities and accomplishments of the national and international standardization agencies.
- State Measurement Laboratories
- Abstract: The National Bureau of Standards receives repeated requests from industry and Federal agencies (e.g. , Department of Defense, Nuclear Regulatory Commission) for information about the capabilities of and services provided by State measurement laboratories. This directory is a compilation of such information by State, including a description of the services available and fees charged. The directory will be updated annually in January of each year to coincide with the issuance of annual certification of these laboratories.
- A Statistical Characterization of Electroexplosive Devices Relevant to Electromagnetic Compatibility Assessment
- Abstract: Electroexplosive devices (EEDs) are electrically fired explosive initiators used in a wide variety of applications. The nature of most of these applications requires that the devices function with near certainty when required and remain inactive otherwise. Recent concern with pulsed electromagnetic interference (EMI) and nuclear electromagnetic pulse (EMP) made apparent the lack of methodology for assessing EED vulnerability. A new and rigorous approach for characterizing EED firing levels is developed in the context of statistical linear models and is demonstrated in this paper. We combine statistical theory and methodology with thermodynamic modeling to determine the probability that an EED, of a particular type, fires when excited by a pulse of a given width and amplitude. The results can be applied to any type of EED for which the hot-wire explosive binder does not melt below the firing temperature. Included are methods.for assessing model validity and for obtaining probability plots, called "Firing Likelihood Plots". A method of measuring the thermal time constant of an EED is given. This parameter is necessary to evaluate the effect of a train of pulses. These statistical methods are both more general and more efficient than previous methods for EED assessment. The results provide information which is crucial for evaluating the effects of currents induced by impulsive electromagnetic fields of short duration relative to the EEDs thermal time constant.
- The Steam-Turbine Expansion Line on the Mollier Diagram, and a Short Method of Finding the Reheat Factor
- Report issued by the Bureau of Standards over the Mollier diagram. The steam-turbine expansion line on the diagram is discussed. This report includes tables, and illustrations.
- Steel Research Needs for Buildings
- Abstract: This report identifies experimental and analytical research needed to advance the state-of-the-art and improve safety and economy in the design, fabrication and construction of steel buildings. A five year plan for a coordinated research program is included. Recommendations for research projects dealing with the following topics are presented: total building systems, connections and members, frames, seismic design, load and resistance factor design, fire protection, and design loads. The recommendations were developed at a workshop involving participation by steel industry representatives, design professionals, Federal agency representatives and university researchers.
- Strain Lines Developed by Compressive Tests on Structural Members of the Delaware River Bridge at the United States Bureau of Standards for the Delaware River Bridge Joint Commission
- Strain lines illustrations from Delaware River Bridge.
- The Strength of Reinforced Concrete Beams; Results of Tests of 333 Beams (First Series)
- Report issued by the Bureau of Standards discussing studies conducted on reinforced concrete beams. The strength and behavior of reinforced beams at different time intervals is presented.
- Stress Corrosion Cracking Control Measures
- From Abstract: "This publication attempts to diminish the incidence of stress corrosion failures by assembling the available practical measures to avoid or minimize the problem and present these measures in a form comprehensible to those persons responsible for the design, fabrication, and maintenance of new structures."
- Structure Shielding Against Fallout Radiation From Nuclear Weapons
- From Purpose: "This Monograph is to assist scientists and engineers in the solution of problems of protection from ionizing radiation, particularly radiation from fallout."
- A Study of Lunar Surface Radio Communication
- Report discussing the problem of point-to-point radio communication on the moon. Equations and curves are presented to estimate power requirements in lunar communication systems. Consideration is given to ground wave attenuation over both layered and non-layered grounds, antenna ground losses in situations where ground screens are impractical, noise level estimates in the receiving system, and the effects on propagation of possible lunar ionospheres. An example of the calculation of required power for a particular communication system is given, and further studies are suggested.
- A Study of Techniques for Measuring the Electromagnetic Shielding Effectiveness of Materials
- Abstract: Shielding effectiveness relates to a material's ability to reduce the transmission of propagating fields in order to electromagnetically isolate one region from another. Because a complex material's shielding capability is difficult to predict, it often must be measured. A number of measurement approaches are studied including the use of a shielded room, coaxial transmission line holders, time domain signals, the dual TEM cell, and an apertured TEM cell in a reverberation chamber. In each case, we consider the system's frequency range, test sample requirements, test field type, dynamic range, time required, analytical background, and present data taken on a common set of materials.
- A Study of the Current Transformer with Particular Reference to Iron Loss
- Report issued by the Bureau of Standards over studies conducted on current transformers. Emphasis is placed on iron loss. The results of the studies are presented and discussed. This report includes tables, and illustrations.
- Supplement to Recommended Minimum Requirements for Plumbing: Progress Revision, May, 1931
- Report issued by the Bureau of Standards discussing revisions and supplements made to minimum plumbing requirements for residential and commercial buildings. The revisions and supplements to previous reports are presented. This report includes tables, and illustrations.
- Survey of Micromanometers
- This survey is concerned with instrumentation for measuring pressures from about 0.001 to 50mm of mercury (0.13 to 6650 Nm-2), described in publications during the years 1900-1968. U-tube micromanometers and diaphragm-capacitance gages are treated in considerable detail. Other instrumentation described includes gas column manometers; elastic element micromanometers with optical, inductance, resistance wire, strain gage, and vacuum tube transducers; piston gages; vane gages; and centrifugal micromanometers. The measurement of dynamic pressure, atmospheric pressure oscillations, low vapor pressure, and calibration techniques are discussed. Schematic diagrams of approximately 70 instruments are included. References to the sources of information and available performance data are given.
- Survey of the Properties of the Hydrogen Isotopes Below Their Critical Temperatures
- The survey covers PVT, thermodynamic, thermal, transport, electrical radiative and mechanical properties.
- A System for Measuring Energy and Peak Power of Low-Level 1.064 [mu]m Laser Pulses
- From introduction: For the first time, transfer standards have been developed for measuring 1.064 Pm laser pulses of duration about 10-100 ns, peak irradiance of about 10-8-10-4 W/cm2, and fluences of about 10-16-10-11 J/cm2 . These energy and power measurement devices use PIN and APD silicon detectors, respectively, and can be used as stable transfer standards with total uncertainties (random errors computed at the 95 percent confidence level) of 10 to 15 percent. The system for calibrating these transfer standards is also described and consists of a cw Nd:YAG laser beam acousto-optically modulated to provide low-level laser pulses of known peak power and energy. A detailed evaluation of systematic and random errors is also shown.