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Office of Scientific & Technical Information Technical Reports
86
Technical Report Archive and Image Library
53
Texas State Publications
45
Congressional Research Service Reports
3
National Advisory Committee for Aeronautics Collection
2
Government Documents General Collection
2
Clara Luper Collection
1
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1
Oklahoma Historical Society Manuscript Collection
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Texas Broilers
45
United States Bureau of Mines Reports
20
United States Geological Survey Reports
10
Atomic Energy Commission Reports
9
GJBX
9
Report of investigations (United States. Bureau of Mines)
5
Water Resources Investigations Reports
5
Aerial Radiometric and Magnetic Reconnaissance Survey of Baltimore, Washington, and Richmond Quadrangles
4
U.S. Waterways Experiment Station Reports
4
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Beach and Borrow Site Sediment Investigation for a Beach Nourishment at Ocean City, Maryland
Report describing the methodology used to sample and analyze sediment at Ocean City, Maryland as part of a beach nourishment project. During the project, sediment was moved from borrow sites to construct parts of the beach area; both the borrow sites and native beach were tested.
Date:
May 1990
Creator:
Anders, Fred J. & Hansen, Mark
System:
The UNT Digital Library
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."
Date:
1954
Creator:
Ash, S. H. (Simon Harry), b. 1889; Dierks, H. A.; Kynor, H. D.; Lesser, W. H.; Miller, P. S. & Romischer, W. M.
System:
The UNT Digital Library
Rehabilitation of the South Jetty, Ocean City, Maryland
Partial abstract: Frequent dredging requirements and scouring at the foundation of Ocean City Inlet's south jetty resulted in a study to determine the source of the shoaling and scouring. The study concluded that sand was being transported northward along Assateague Island, through and over the south jetty, and deposited inside the inlet. The sand was then transported north by ebb currents where it encroached on the Federal navigation channel. A rehabilitation program was initiated to create a littoral barrier to eliminate the shoaling problem and to repair the scour hold. Three headland breakwaters were constructed to stabilize Northern Assateague Island. The site was selected as part of the Monitoring Completed Coastal Projects (MCCP) Program to determine how well the rehabilitation project accomplished its design purpose.
Date:
March 1994
Creator:
Bass, Gregory P.; Fulford, Edward T.; Underwood, Steven G. & Parson, Larry E.
System:
The UNT Digital Library
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."
Date:
May 1, 1959
Creator:
Batter, J. F., Jr.; Kaplan, A. L. & Clarke, Eric Thacher
System:
The UNT Digital Library
Maryland Emergency Management and Homeland Security Statutory Authorities Summarized
This report is one of a series that profiles the emergency management and homeland security statutory authorities of the 50 states, the District of Columbia, the Commonwealth of the Northern Mariana Islands, the Commonwealth of Puerto Rico, and three territories (American Samoa, Guam, and the U.S. Virgin Islands). Each profile identifies the more significant elements of state statutes, generally as codified. This report focuses on the state of Maryland.
Date:
September 3, 2004
Creator:
Bea, Keith; Runyon, L. Cheryl & Warnock, Kae M.
System:
The UNT Digital Library
Aerial Radiometric and Magnetic Survey: Wilmington National Topographic Map, Delaware/Maryland/New Jersey/Pennsylvania
From abstract: "The results of analyses of the airborne gamma radiation and total magnetic field survey flown for the region identified as the Wilmington National Topographic Maps, numbered NJ18-2 is presented in this report."
Date:
1980
Creator:
Bendix Field Engineering Corporation
System:
The UNT Digital Library
Geothermal energy development in the Eastern United States. Technical assistance report No. 4. Geothermal space heating: Pittsville Middle/Elementary School, Pittsville, Maryland
A technical evaluation was made to determine whether geothermal energy obtained from a well could be used to space heat the new school building being constructed as well as the existing elementary wing of the Pittsville School. The first part deals with space heating the new school building only; the second part pertains to space heating the new school building together with the new existing wing. An addendum was added for new well and production pump costs. (MHR)
Date:
June 1, 1980
Creator:
Briesen, R.V. & Yu, K.
System:
The UNT Digital Library
Geology of the Waterford Quadrangle, Virginia and Maryland, and the Virginia Part of the Point of Rocks Quadrangle
The following report analyzes the geology of the Waterford quadrangle and the Virginia part of the Point of Rocks quadrangle.
Date:
1995
Creator:
Burton, William C.; Froelich, Albert J.; Pomeroy, John S. & Lee, K. Y.
System:
The UNT Digital Library
Fisheries Ecosystem Model of the Chesapeake Bay: Methodology, Parameterization, and Model Exploration
Report on the construction of a model to manage fisheries in the Chesapeake Bay region, to see how stocks affect the food web and provide quantified estimations. "This report describes an ecosystem model of the Chesapeake Bay, the Chesapeake Bay Fisheries Ecosystem Model (CBFEM), prepared using the Ecopath with Ecosim approach and software" (p. 5).
Date:
October 2009
Creator:
Christensen, Villy; Beattie, Alasdair; Buchanan, Claire; Ma, Hongguang; Martell, Steven J. D.; Latour, Robert J. et al.
System:
The UNT Digital Library
Final Report: A Level-of-Detail Approach to Cluster-based Visualization
In this research project we have tightly integrate the use of level of detail with PC cluster-based rendering systems.
Date:
November 20, 2009
Creator:
Cohen, Jonathan
System:
The UNT Digital Library
Primary Productivity by Phytoplankton in the Tidal, Fresh Potomac River, Maryland, May 1980 to August 1981
Purpose and scope: The purpose of this study was to determine primary productivity and respiration of the fresh, tidal Potomac River. The data will be used by the authors and other researchers involved in modelling chemical and biological properties to calculate phytoplankton growth rates. Methods are documented in detail so that the report could serve as a reference. The report covers the period from May 1980 through August 1981. Five stations were selected for study that are representative of biologically important reaches of the fresh, tidal Potomac River.
Date:
1983
Creator:
Cohen, Ronald R. H. & Pollock, Sheryl O.
System:
The UNT Digital Library
Potash Salts from Texas-New Mexico Polyhalite Deposits: Commercial Possibilities, Proposed Technology, and Pertinent Salt-Solution Equilibria
From Introduction: "Figure 1 shows the location of sources that have been either exploited or seriously considered at one time or another, super-imposed upon a map indicating by small letters the order of consumption of K2O in the leading States; the amount used in these States, together with the percentage of the total consumption of potash used as fertilizer in the United States in 1939, is given in table 1. Figure 2 shows the domestic production and total consumption of potassium salts, in terms of tons of K2O, with the value per unit at the plants, for each year since 1913. Considered together, these two figures tell a significant story."
Date:
1944
Creator:
Conley, John E. & Partridge, Everett P.
System:
The UNT Digital Library
Preliminary reentry safety assessment of the General Purpose Heat Source module for the Cassini mission: Aerospace Nuclear Safety Program
As asked by the U. S. Department of Energy/Office of Special Applications, and in support of the Environmental Impact Statement for the Cassini mission, The Johns Hopkins University/Applied Physics Laboratory (JHU/APL) has conducted preliminary one-dimensional ablation and thermal analyses of the General Purpose Heat Source (GPHS). The predicted earth entry conditions provided by the Jet Propulsion Laboratory (JPL) for a Cassini Venus-Venus-Earth-Jupiter Gravity Assist (VVEJGA) trajectory were used as initial conditions. The results of this study which constitute the initial reentry analysis assessment leading to the Cassini Updated Safety, Analysis Report (USAR) are discussed in this document.
Date:
April 1, 1993
Creator:
Conn, D. W. & Brenza, P. T.
System:
The UNT Digital Library
Pioneer F/SNAP 19 heat source thermal analysis
None
Date:
April 1, 1972
Creator:
Conn, D. W. & Frazer, R. K.
System:
The UNT Digital Library
Pioneer F/SNAP 19 heat source ablation studies
None
Date:
February 1, 1972
Creator:
Conn, D.W.
System:
The UNT Digital Library
Potential geothermal energy use at the Naval Air Rework Facilities, Norfolk, Virginia and Jacksonville, Florida, and at the naval shipyard, Charleston, South Carolina
The feasibility of geothermal energy use at naval installations in Norfolk, VA, Jacksonville, FL, and Charleston, SC was assessed. Geophysical and geological studies of the above areas were performed. Engineering and economic factors, affecting potential energy use, were evaluated. The Norfolk and Jacksonville facilities are identified as candidates for geothermal systems. System costs are predicted. Economic benefits of the proposed geothermal systems are forecast, using the net present value method of predicting future income.
Date:
May 1, 1984
Creator:
Costain, J. K.; Glover, L., III & Newman, R. W.
System:
The UNT Digital Library
Environmental assessment of Chalk Point cooling tower drift and vapor emissions
An assessment is provided of selected environmental effects of operating the cooling towers and stacks of Units No. 3 and No. 4 of the Potomac Electric Power Company's generating station at Chalk Point, Maryland. The emphasis is on the magnitude of salt deposition to the area surrounding the cooling tower due to saline water drift. A secondary but important consideration is the magnitude of salt loading due to saline drift from the stack which uses saline river water in scrubbing flue gases. This salt loading together with that of the ambient salt background is assessed for its effects on soils, crops, native vegetation and man-made structures. Other atmospheric effects examined are: enhancement of ground level fogging and icing, enhancement of precipitation, and the flight hazards to aircraft. A numerical model of drift deposition has been developed and validated against the data collected in the Dyed Drift Experiment at Chalk Point. Use of the available data model predictions indicate that with fulltime, full load operation of both 600 MW(e) units significant levels of salt deposition occur only on the plant site within 0.4 km of the source. The predicted maximum salt deposition rates are given. The effects on soils, crops and …
Date:
March 1, 1979
Creator:
Davis, E. A.
System:
The UNT Digital Library
Energy Programs at the Johns Hopkins University Applied Physics Laboratory, Quarterly Report, January-March 1980
The Johns Hopkins University Applied Physics Laboratory, under contracts with several agencies of the federal government and an agency of the State of Maryland, is engaged in developing energy resources, utilization concepts, and monitoring and storage methods. This Quarterly Report summarizes the work on the various tasks as of 31 March 1980. The Energy Quarterly Report is divided into four sections. The first, Geothermal Energy Development Planning and Technical Assistance, supported by the Department of Energy/Division of Geothermal Energy (DOE/DGE), contains reports on the progress of geothermal-related tasks on which effort was concentrated during the quarter. The second section, Operational Research, Hydroelectric Power Development, supported by the Department of Energy/Resource Applications (DOE/DGE), contains reports on small-scale hydroelectric investigations in the southeastern states. The third section, Seismotectonic Investigation, supported by the Reactor Safety Research Division of the Nuclear Regulatory Commission, reports on a neotectonic investigation in Connecticut. The fourth section, Energy Conversion and Storage Techniques, contains two articles, the first on OTEC core unit testing supported by the Department of Energy/Division of Central Solar Technology (DOE/CST), and the second on an analysis of the Community Annual Storage Energy System at the U.S. Naval Air Station, Norfolk, Va. This work is supported …
Date:
March 1, 1980
Creator:
Entingh, Daniel J.
System:
The UNT Digital Library
Memo to NAACP presidents and secretarys regarding membership
Quarterly membership update for October, 2003. Includes updates on goals and campaign efforts.
Date:
October 2003
Creator:
Evans, Regina A.
System:
The Gateway to Oklahoma History
Final Technical Report, Outstanding Junior Investigator Award for De-fg02-94er40869
This report summarizes the research of the Principal Investigator, his postdoctoral research associates, and his students during the period of the award. The majority of the work concerns the behavior of hadrons containing strange, charm, bottom and top quarks, with a particular focus on the extraction of Cabibbo--Kobayashi--Maskawa matrix elements from experiments performed on such systems.
Date:
May 16, 2002
Creator:
Falk, Adam F.
System:
The UNT Digital Library
The Unstable Species and the Isotope Effect in the Pyrolysis of Diborane in a Shock Tube
From American Chemical Society 145th National Meeting, New York, Sept. 1963. The pyrolysis of diborane was examined using a chemical shock tube as a reactor. Additional evidence for the existence of hexaborane-12 and heptaborane- 11 and -13 was obtained. The presence of a large net normal isotope effect in the formation of tetraborane and hexaborane and a net inverse isotope effect in the formation of pentaborane-9 are observed. A mechanism, consisting of a series of competitive reactions and eqailibria, in which tetraboraue is the precursor of pentaborane-11 and hexaborane but not of pentaborane-9 is shown to be compatible with the observed isotope effect. Data obtained by examining the pyrolysis of various mixtures of boron hydrides are also consistent with the mechanism. (auth)
Date:
January 1, 1963
Creator:
Fehlher, T P & Koski, W S
System:
The UNT Digital Library
Vacuum deposited polycrystalline silicon films for solar cell applications. Second quarterly technical progress report. January 1-March 31, 1980
A careful study of a specially formed thin silicon layer on TiB/sub 2/-coated sapphire reveals that the interaction layer of TiSi/sub 2/ is composed of larger grains. Processing steps were developed which lead closer to the goal of fabricating polycrystalline silicon photovoltaic devices completely by vacuum deposition. Both n-type and p-type silicon are now being deposited. New deposition masks were made for depositing the n-regions upon the p-layers. New electrode deposition masks were also made for a direct electroding process to replace the photolithographic process used previously. The TiB/sub 2/ bottom electrode fabrication has been achieved in a single vacuum chamber. Reaction constants and activation energy for TiB/sub 2/ layer formation were determined to be less than those reported by other authors for bulk material. Studies of crystallite growth and interfacial interactions have continued. Major sources of undesirable impurities have been identified and removed from the vacuum chambers. The changes made this quarter have not been incorporated into a completed photovoltaic device.
Date:
May 1, 1980
Creator:
Feldman, C.; Arlington, III, C. H.; Blum, N. A. & Satkiewicz, F. G.
System:
The UNT Digital Library
Vacuum deposited polycrystalline silicon films for solar cell applications. Quarterly report, September 15-December 31, 1979
Polycrystalline silicon films 14-22 ..mu..m thick and with average grain diameters of 20-40 ..mu..m were deposited by vacuum deposition onto both ceramic and sapphire substrates which were previously coated with a thin (1-2 ..mu..m) TiB/sub 2/ conducting layer. The large grains are the result of an interaction in the initial growth stages between silicon and TiB/sub 2/. SIMS studies of B/Ti/Al/sub 2/O/sub 3/, B/Al/sub 2/O/sub 3/, and Ti/Al/sub 2/O/sub 3/, interactions are reported as part of a continuing investigation of TiB/sub 2/ formation and silicon interactions on the TiB/sub 2/ surface. The increase in grain size has led to an improvement in the open-circuit voltage V/sub oc/, but not to an increase in the short-circuit current J/sub sc/. Capacitance-voltage measurements give results characteristic of an abrupt junction and a build-in voltage V/sub D/ consistent with the measured doping levels. A simple method for measuring the minority carrier diffusion length in the base region L/sub n/ is described. The measurements indicate that there is little change in L/sub n/ between large (20-40 ..mu..m) and small (approx. 5 ..mu..m) grained samples.
Date:
March 1, 1980
Creator:
Feldman, C.; Arrington, C. H.; Blum, N. A. & Satkiewicz, F. G.
System:
The UNT Digital Library
Vacuum deposited polycrystalline silicon films for solar cell applications. Quarterly report, 1 April-30 June 1980
Polycrystalline p-type films were vacuum deposited onto TiB/sub 2/ coated alumina and sapphire substrates. Epitaxial layers were also formed on single crystal silicon substrates. Junctions in the layers were created by both gaseous diffusion in a tube furnace and by vacuum deposition. The TiB/sub 2/ vacuum deposited bottom electrodes have resistivities between 30 and 40 ..mu.. ..cap omega..-cm. All-vacuum-deposited solar cells were fabricated for the first time. Efficiencies approaching those in the diffused junction devices were achieved. The n-layers were deposited on the previously deposited p-layer/TiB/sub 2//ceramic sandwiches by vacuum deposition of silicon in a phosphine (PH/sub 3/) atmosphere. Photovoltaic data in diffused junction samples, including efficiency and spectral response measurements, indicate that crystallite size may no longer be the limiting factor in achieving high efficiency; rather, performance is now being limited by the presence of impurities in the vacuum deposition silicon base region.
Date:
August 1, 1980
Creator:
Feldman, C.; Arrington, III, C. H.; Blum, N. A. & Satkiewicz, F. G.
System:
The UNT Digital Library