UNT Libraries Government Documents Department - 19 Matching Results
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- Analyses of Tipple and Delivered Samples of Coal: (Collected During the Fiscal Years 1948 to 1950 Inclusive)
- From Forward: "This bulletin is the first of a new series, which includes analyses of only tipple and delivered coal. It covers samples collected throughout the United States from July 1, 1947 to June 30, 1950 (fiscal years 1948-50). It is planned that future publications of this series will cover a period of one fiscal year only and be issued as soon as possible after June 30 of each year."
- An analytical study of the effect of airplane wake on the lateral dispersion of aerial sprays
- From the Introduction: "In the present reports the paths of liquid spray droplets issued in the flow field behind an airplane are calculated."
- Annual Report. Part A: Studies in K-Capture Positron Branching Ratios. Part B: Search for a Low-Lying O+ State in Gallium-68
- K-capture to positron branching ratios were measured in the decay of Na/ sup 22/, Co/sup 58/, and Ga/sup 68/ -- all pure Gamow-Teller emitters, using coincidence scintillation spectrometer techniques. The measured values are 0.105 plus or minus 0.004 for Na/sup 22/, 5.08 plus or minus 0.17 for Co/sup 58/, and 1.28 plus or minus 0.12 and 0.10 plus or minus 0.02 for Ga/sup 58/. From these the Fierz interference terra is computed to be b =--0.004 plus or minus 0.012, -0.004 plus or minus 0.14, --0-03 plus or minus 0.02, and +0.03 plus or minus 0.01, respectively. These results indicate that the Fierz interference in Gamow-Teller interaction is very small. The decay of 270 day Ge/sup 68/ was investigated in equilibrium with Ga/sup 68/ to look for a possible low-lying 0+ level in Ga/sup 68/ using x-ray--x-ray and x-ray- gamma -ray coincidences. The result was negative. Besides the 9 kev K x ray, the 1.07 Mev gamma ray in the decay of Ga/sup 68/ and annihilation radiation, no other gamma rays were detected (<8% of 1.07 Mev gamma ray). The number of positrons per 1.07 Mev gamma - quantum was determined as 19.47 plus or minus 2.10. The ratio of positrons to the 1.07 Mev level and ground state of Zn/sup 68/ was found to be (1.76 plus or minus 0.22) x 10/sup -2/. Studies with a Ge/sup 68/ source chemically separated from Ga/sup 68/ showed no gamma rays (<1% of total Ge/sup 68/ decays). By following the growth of annihilation radiation, an upper limit of 0.4% per decay cculd be set on the amount of positron emission by Ge/sup 68/. A search for an electric monopole (EO) transition from the 2.3 Mev level to the O/sup +/ ground state of Zn/sup 68/ was made using plastic scintillators and an …
- Behavior of Institutional Incinerators When Used to Burn Radioactive Wastes: Final Project Report for August 1, 1950-November 1, 1952
- This report deals with the development of methods and techniques for measuring the amounts of radioisotope on the stack wall, in ash, stack gas and atmosphere during and after incineration in the conventional refuse-type destructor.
- Birds of Maryland and the District of Columbia
- Summary of the birds of Maryland and the District of Columbia, including geographical distribution, details on each species, and several maps of breeding ranges.
- Castleman Basin, Garrett County, Maryland
- Report published by the U.S. Bureau of Mines containing the results of a survey to determine the status of the coal beds in Maryland. The report discusses the characteristics of the coal in the area as well as mining practices and geologic overview.
- An Elementary Review of the Mathieu-Hill Equation of Real Variable Based on Numerical Solutions
- Abstract: description is given of a large number of trajectories of Mathieu's equation made on the ENIAC in 1948 and available at BRL. A large chart describing the behaviour of the solutions is given. The occasion is taken to review the essentials of the Mathieu theory for the benefit of the occasional user-proceeding from the point of view of an inspection of the numerical data.
- Estimate of Known Recoverable Reserves of Coking Coal in Allegany County, Maryland
- Report issued by the U.S. Bureau of Mines investigating the estimated reserves of coking coal in Allegany County, Maryland. The investigation also studied properties of coals and coal blends not widely used for metallurgical coke making. This report includes maps and tables.
- Estimate of Known Recoverable Reserves of Coking Coal in Allegany County, Maryland
- Report issued by the U.S. Bureau of Mines investigating the estimated reserves of coking coal in Allegany County, Maryland. The investigation also studied properties of coals and coal blends not widely used for metallurgical coke making. This report includes maps and tables.
- AN EVALUATION OF LAUNDERING AGENTS AND TECHNIQUES USED IN THE DECONTAMINATION OF COTTON CLOTHING
- No Description Available.
- An Experimental Evaluation of the Radiation Protection Afforded by a Large Modern Concrete Office Building
- Abstract: "An experimental study was made to determine the effective shielding provided by a modern reinforced-concrete office building (AEC Headquarters building) from nuclear fallout. Pocket ionization chambers were used for measurement of the radiation-field strength. Fallout was simulated with distributed and point-source configurations of Co-60 and Ir-192 sources. Four typical sections were selected for study, and experiments were performed on each. These included an external wing with exposed basement walls and an external wing with a buried basement. Roof studies were made on an internal wing with a full basement and on the east end of wing A, which has a thin-roof construction. The thick-roof construction of 8 in. of concrete and 2 in. of rigid insulation covers all the building except the east end of wing A, which has 4 in. of concrete and 2 in. of insulation."
- Flood Prevention in Anthracite Mines, Northern Field: Anthracite Region of Pennsylvania, Project Number 1 (Lackawanna)
- From Scope of Report: "The report covers the following: (a) A brief description of the proposed Conowingo tunnel system, which will drain the anthracite mines of Pennsylvania into the Susquehanna River at Conowingo. Md.; (b) economic development of the Northern field and the improvements desired; (c) geology and hydrology of the Northern field; (d) the basic problem, plans, and costs of Project No.1 (Lackawanna) ; (e) economic analysis and justification of the project; and (f) final recommendations, including financing and cooperation of local interests."
- Flood Protection Plans for Cumberland, Maryland & Ridgeley, West Virginia: Hydraulic Model Investigation
- Report of a hydraulic model investigation "to determine the most economical method of providing protection for Cumberland and Ridgeley against floods somewhat greater than the flood of March 1936 Specifically, the model was used to determine: the proper sections and grades of channels required to pass the design flood with maximum reductions in flood stages; the minimum heights of levees and walls; and the channel treatment required at bridges to insure the safe passage of floodwaters with minimum alterations to the structures" (p. 4).
- Low-Temperature Carbonization Assays of North American Coals
- Report issued by the Bureau of Mines over studies conducted on low-temperature carbonization of coal. Methods and results of the studies are presented and discussed. This report includes tables, illustrations, and photographs.
- Radioactive Waste Disposal Practices in the Atomic Energy Industry. A Survey of the Costs
- A survey was made on methcds and related costs of disposing of radioactive wastes as practiced in 1955 by twelve atomic industry installations. Wherever possible, estimated unit costs of differentiated stages of waste handling are shown- these are integrated to show the over-all scope of waste dispesal practices at each site. Tabular data summarize costs and operation magnitades at the installations. A pattern is established for standardizing the reporting of fixed costs and equipment unsage costs. The economy of solid waste volume reduction is analyzed. Material costs are listed. An outline for recording monthly waste disposal costs is presented. Obvious conclusions drawn from the factual data are: that it is more expensive per cubic foot to handle high-level wastes than low-level wastes. and that land disposal is less expenaive than sea disposal. A reexamination of baling economics shows that high compression of solid wastes is more expensive than simpler forms of compaction. (auth)
- STUDIES OF FAST NEUTRONS AND FAST NEUTRON REACTIONS
- No Description Available.
- Substation History: Maryland and Delaware
- This report gives information about substation locations, elevations,exposures and many from date station was established through the year 1955,which are present in Maryland and Delaware
- The Synthetic Liquid Fuel Potential of Maryland
- Report documenting the suitability of Maryland for plant locations to produce synthetic liquid fuels, based on raw materials, water sources, and local interest.
- Titanium Minerals in the Heavy Sand Deposits of Assateague Island, Maryland
- Report issued by the Bureau of Mines over titanium deposits of Assateague Island, Maryland. As stated in the introduction, "the purpose of this project was to study a typical coastal deposit of beach sands in the Middle Atlantic States, particularly in the area surrounding the Delmarva Peninsula" (p. 1). This report includes tables, maps, and illustrations.