Degree Level

36,488 Matching Results

Results open in a new window/tab.

Presidential Inaugurations: The Case of Inaugural Dates Falling on Sunday (open access)

Presidential Inaugurations: The Case of Inaugural Dates Falling on Sunday

This report's purpose is to present the constitutional and historical background of the "interregnum" question and to describe the precedents established on these occasions. It discusses when the date set for the inauguration of the president has fallen on a Sunday.
Date: July 8, 1968
Creator: Beebe, Ronald
Object Type: Report
System: The UNT Digital Library
Oral Contraceptives: An Analysis of Their Use in the United States (open access)

Oral Contraceptives: An Analysis of Their Use in the United States

This report discusses the use of oral contraceptives in the United States and concerns about their safety and effectiveness as well as related legislation and Senate hearings regarding these concerns.
Date: July 9, 1970
Creator: McKenzie, Susan R.
Object Type: Report
System: The UNT Digital Library
Renewable Resources: a national catalog of model projects. Volume 1. Northeast Solar Energy Center Region (open access)

Renewable Resources: a national catalog of model projects. Volume 1. Northeast Solar Energy Center Region

This compilation of diverse conservation and renewable energy projects across the United States was prepared through the enthusiastic participation of solar and alternate energy groups from every state and region. Compiled and edited by the Center for Renewable Resources, these projects reflect many levels of innovation and technical expertise. In many cases, a critique analysis is presented of how projects performed and of the institutional conditions associated with their success or failure. Some 2000 projects are included in this compilation; most have worked, some have not. Information about all is presented to aid learning from these experiences. The four volumes in this set are arranged in state sections by geographic region, coinciding with the four Regional Solar Energy Centers. The table of contents is organized by project category so that maximum cross-referencing may be obtained. This volume includes information on the Northeast Solar Energy Center Region. (WHK).
Date: July 1, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Excited-state proton-transfer kinetics in 1-naphthol, 1-naphthol-sulfonates, and organometallic complexes (open access)

Excited-state proton-transfer kinetics in 1-naphthol, 1-naphthol-sulfonates, and organometallic complexes

The dissociation of 1-naphthol in aqueous solution occurs so rapidly that the fluorescence from the neutral form, ROH, has been previously described as completely extinguished or hardly noticeable. Apparently nearly all of the fluorescence originates from the naphtholate ion. This paper reports on the proton-transfer characteristics of a series of 1-naphthol compounds, and also reports preliminary data on excited-state proton transfer in an organometallic complex of ruthenium.
Date: July 1, 1980
Creator: Shapiro, S. L.; Winn, K. R. & Clark, J. H.
Object Type: Article
System: The UNT Digital Library
Site locality identification study: Hanford Site. Volume II. Data cataloging (open access)

Site locality identification study: Hanford Site. Volume II. Data cataloging

Data compilation and cataloging for the candidate site locality identification study were conducted in order to provide a retrievable data cataloging system for the present siting study and future site evaluation and licensng processes. This task occurred concurrently with and also independently of other tasks of the candidate site locality identification study. Work in this task provided the data utilized primarily in the development and application of screening and ranking processes to identify candidate site localities on the Hanford Site. The overall approach included two steps: (1) data acquisition and screening; and (2) data compilation and cataloging. Data acquisition and screening formed the basis for preliminary review of data sources with respect to their probable utilization in the candidate site locality identification study and review with respect to the level of completeness and detail of the data. The important working assumption was that the data to be used in the study be based on existing and available published and unpublished literature. The data compilation and cataloging provided the basic product of the Task; a retrievable data cataloging system in the form of an annotated reference list and key word index and an index of compiled data. The annotated reference list …
Date: July 1, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Solar energy system demonstration project at Wilmington Swim School, New Castle, Delaware. Final report (open access)

Solar energy system demonstration project at Wilmington Swim School, New Castle, Delaware. Final report

This document is the Final Report of the Solar Energy System located at the Wilmington, Swim School, New Castle, Delaware. This active solar system is composed of 2,700 square feet of Revere liquid flat plate collectors piped to a 2,800 gallon concrete storage tank located below ground near the building. A micro-computer based control system selects the optimal applications of the stored energy among space, domestic water and pool alternatives. The controlled logic is planned for serving the heat loads in the following order: space heat-new addition, domestic water-entire facility, and pool heating-entire facility. A modified trombe wall passive operation the active system will bypass the areas being served passively. The system was designed for a 40 percent heating and a 30 percent hot water solar contribution.
Date: July 1, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Crop residues as a fuel for power generation (open access)

Crop residues as a fuel for power generation

Crop residues could serve as an alternative energy source for producing electric power and heat in agricultural regions of the United States. Nearly 2 quads of residues are estimated to be available as a sustainable annual yield. These can substitute for up to one quad of conventional fuels used to generate electricity and up to an additional quad of petroleum and natural gas currently used for producing heat. The most promising routes to residue conversion appear to be regional generators sized in the megawatt range, and the mixing of residues with coal for burning in coal power plants. Costing farmers from $0.70 to $1.25 per million Btu, to harvest and prepare for use as a fuel, residues can be a competitive renewable energy supply.
Date: July 1, 1979
Creator: Bhagat, N.; Davitian, H. & Pouder, R.
Object Type: Report
System: The UNT Digital Library
Turbulent interchange in triangular array bare rod bundles (open access)

Turbulent interchange in triangular array bare rod bundles

Bulk mixing coefficients were measured for single plane water flow in a simulated rod bundle with a pitch to diameter ratio of 1.10. A tracer technique employing Rhodamine B as the tracer and measuring fluorescence was used. Isokinetic sampling was achieved by using a pressure balance method. The results were corrected for both entrance effects and diversion crossflows. The results showed a change in Reynolds number behavior as the laminar sublayer began to ''choke'' the turbulent mixing. This, and a review of other mixing experiments, suggested that secondary flows do not compensate for laminarization and that turbulent mixing decreases as the pitch to diameter ratio decreases for values of P/D less than 1.05 in a manner similar to that predicted by Ramm et al. Concentration profiles were measured through the clearance gap and the values of the gradient were used to calculate the gap averaged circumferential eddy diffusivity for mass. A discussion of the eddy diffusivity concept and its applicability to turbulent mixing is presented.
Date: July 1, 1977
Creator: Kelly, J.M. & Todreas, N.
Object Type: Report
System: The UNT Digital Library
Evaluation of thermoplastic polyester molding resins. [Valox 420; Celanex 3300; Tenite 6H91; LNP WF-1006] (open access)

Evaluation of thermoplastic polyester molding resins. [Valox 420; Celanex 3300; Tenite 6H91; LNP WF-1006]

None
Date: July 1, 1975
Creator: Walter, C.L.; Melton, R.J.; Roebuck, C.E. & Smith, R.S.
Object Type: Report
System: The UNT Digital Library
Geophysics: Building E5032 decommissioning, Aberdeen Proving Ground (open access)

Geophysics: Building E5032 decommissioning, Aberdeen Proving Ground

integration of data from surveys using three geophysical technologies has provided information used to define the locations of buried utilities, tanks, vaults, and debris near building E5032 at the Aberdeen Proving Ground. Ground penetrating radar (GPR) profiles indicate the presence of buried pipes, tanks, reinforcement rods (rebar), and remnants of railroad tracks. A magnetic map constructed from a detailed magnetic survey on the north side of the building outlines buried iron-rich objects that are interpreted to be iron pipes, tank, and other debris of uncertain origin at relatively shallow depths. Horizontal electrical resistivity surveys and vertical electrical resistivity soundings essentially corroborated the findings obtained with the magnetometer and GPR. In addition, a highly resistance layer was observed on the east side of the building where a former railroad bed with a thick grave fill is believed to immediately underlie the lawn. The resistivity data show no evidence of a conductive leachate plume. Geophysical measurements from three techniques over a buried concrete slab approximately 130 ft north of Building E5032 give geophysical signatures interpreted to be due to the presence of a large iron tank or vault. An attempt was made to gather meaningful magnetic data on the east, west, and …
Date: July 1, 1991
Creator: McGinnis, L.D. & Miller, S.F.
Object Type: Report
System: The UNT Digital Library
Radiation standards and calibrations. FY-1981 annual report (open access)

Radiation standards and calibrations. FY-1981 annual report

The research program encompasses: reviewing calibration standards, regulations, and handbooks; assuring that calibration procedures used are in agreement with technically accepted methods; maintaining basic radioactive sources and instruments that serve as radiological standards; and providing traceability to the National Bureau of Standards where possible. In addition, major efforts are being expended to upgrade the 318 calibration facility. This report focuses on major accomplishments during FY-1981. However, most maintenance and quality assurance efforts involve routine support and only a summary report is provided. (PSB)
Date: July 1, 1982
Creator: Roberson, P. L.; Yoder, R. C.; Fox, R. A.; Hooker, C. D.; Hogan, R. T.; Holbrook, K. L. et al.
Object Type: Report
System: The UNT Digital Library
Acceleration of electrons using an inverse free electron laser auto- accelerator (open access)

Acceleration of electrons using an inverse free electron laser auto- accelerator

We present data from our study of a device known as the inverse free electron laser. First, numerical simulations were performed to optimize the design parameters for an experiment that accelerates electrons in the presence of an undulator by stimulated absorption of radiation. The Columbia free electron laser (FEL) was configured as an auto-accelerator (IFELA) system; high power (MW's) FEL radiation at {approximately}1.65 mm is developed along the first section of an undulator inside a quasi-optical resonator. The electron beam then traverses a second section of undulator where a fraction of the electrons is accelerated by stimulated absorption of the 1.65 mm wavelength power developed in the first undulator section. The second undulator section has very low gain and does not generate power on its own. We have found that as much as 60% of the power generated in the first section can be absorbed in the second section, providing that the initial electron energy is chosen correctly with respect to the parameters chosen for the first and second undulators. An electron momentum spectrometer is used to monitor the distribution of electron energies as the electrons exit the IFELA. We have found; using our experimental parameters, that roughly 10% of …
Date: July 1, 1992
Creator: Wernick, I.K. & Marshall, T.C.
Object Type: Report
System: The UNT Digital Library
A SURVEY AND EVALUATION OF U$sup 233$ FISSION YIELD DATA (open access)

A SURVEY AND EVALUATION OF U$sup 233$ FISSION YIELD DATA

A survey of the pertinent literature was made to ascertain the status of data on U/sup 233/ fission-product yields. The various experimental determinations were evaluated, and the most recent mass-spectrometric results were used as a basis for deriving a set of preferred yields. These yields were compared with values reported in two other recent compilations, and for yields >1%, the three setrs agreed with each other to an average precision of <5%. It was concluded that recent measurements have somewhar improved the reliability of U/sup 233/ fission yield data, but some recommendations for additional experimental work were made (auth)
Date: July 13, 1962
Creator: Ferguson, R.L. & O'Kelley, G.D.
Object Type: Report
System: The UNT Digital Library
Flash hydropyrolysis of coal. Quarterly report No. 2, April 1--June 30, 1977 (open access)

Flash hydropyrolysis of coal. Quarterly report No. 2, April 1--June 30, 1977

With the combination of low hydrogen to coal ratio, high coal feed rate and larger total quantity of coal fed, considerable liquid product is being condensed and collected. Experimental runs conducted at 750/sup 0/C and 800/sup 0/C at pressures up to 3000 psi of hydrogen show overall hydrocarbon yields and particularly gaseous hydrocarbon yields to increase with pressure to approximately 60 percent at 3000 psi. At 750/sup 0/C approximately one third (20 percent) of this yield is in the form of liquid products (half BTX and half greater than or equal to C/sub 9/) while at 800/sup 0/C the yield is almost all methane with less than 3 percent of liquids produced. Preliminary results of the effect of residence time on product yield and distribution shows that at 3000 psi of hydrogen and 800/sup 0/C, gaseous product yield increase and liquid yields decrease as the residence time is increased from 2.3 to 9.2 seconds. Under almost identical conditions at 750/sup 0/C, all product yields increased with approximately the same increase in residence time. Economic studies of the Flash Hydropyrolysis Process (FHP) are continuing. A detailed analysis of a 25,000 ton/day coal conversion plant utilizing FHP shows the discounted cash flow …
Date: July 1, 1977
Creator: Fallon, P
Object Type: Report
System: The UNT Digital Library
Influences of clouds and rain on the large-scale transport and deposition of sulfur (open access)

Influences of clouds and rain on the large-scale transport and deposition of sulfur

This paper describes the application of a three-dimensional, global-scale Eulerian model with an explicit description of cloud and chemical processes. Simulation results describing the transport of sulfur from North America and Europe across the north Atlantic Ocean during a climatological July are presented. Wet deposition was found to contribute slightly more to total sulfur deposition than dry deposition, a feature explained by the large amounts of precipitation during this month. The wet deposition patterns did not always correspond to the emissions patterns. The precipitation rate and spatial distribution had a large effect on the calculated concentrations of soluble sulfur species. 10 refs., 7 figs., 1 tab.
Date: July 1, 1991
Creator: Luecken, D.J.; Berkowitz, C.M. & Easter, R.C.
Object Type: Article
System: The UNT Digital Library
HOMOGENIZATION OF MOLTEN-SALT REACTOR PROJECT FUEL SAMPLES (open access)

HOMOGENIZATION OF MOLTEN-SALT REACTOR PROJECT FUEL SAMPLES

A copper pulverizer-mixer was designed for homogenizing Molten-Salt Reactor Project (MSRP) fuel. The copper sampling ladle that contains the solidified fuel is placed in the pulverizer-mixer, which is agitated on a mixer mill. The fuel is fractured out of the ladle, pulverized into a homogeneous powder, and transferred to a storage bottle. The homogenized fuel sample is then available for analysis. (auth)
Date: July 1, 1962
Creator: Gaitanis, M.J.; Lamb, C.E. & Corbin, L.T.
Object Type: Report
System: The UNT Digital Library
Drilling fluid/formation interaction at simulated in situ geothermal conditions. Final report (open access)

Drilling fluid/formation interaction at simulated in situ geothermal conditions. Final report

Interaction of drilling fluids with a geothermal reservoir formation can result in significant permeability impairment and therefore reduced well productivity. This interaction is studied under simulated in situ geothermal conditions of overburden stress, pore fluid pressure, temperature, and pore fluid chemistry. Permeability impairment of an East Mesa KGRA reservoir material is evaluated as a function of stagnation time, drilling fluid, and temperature. Results indicate that all of these parameters contribute significantly to the magnitude and the reversibility of the impairment.
Date: July 1, 1980
Creator: Enniss, D. O.; Bergosh, J. L.; Butters, S. W. & Jones, A. H.
Object Type: Report
System: The UNT Digital Library
Future engineering needs of mirror fusion reactors (open access)

Future engineering needs of mirror fusion reactors

Fusion research has matured during the last decade and significant insight into the future program needs has emerged. While some will properly note that the crystal ball is cloudy, it is equally important to note that the shape and outline of our course is discernable. In this short summary paper, I will draw upon the National Mirror Program Plan for mirror projects and on available design studies of these projects to put the specific needs of the mirror program in perspective.
Date: July 30, 1982
Creator: Thomassen, K.I.
Object Type: Article
System: The UNT Digital Library
Stock Assessment of Columbia River Anadromous Salmonids: Final Report, Volume 1. Chinook, Coho, Chum and Sockeye Salmon Summaries. (open access)

Stock Assessment of Columbia River Anadromous Salmonids: Final Report, Volume 1. Chinook, Coho, Chum and Sockeye Salmon Summaries.

The purpose was to identify and characterize the wild and hatchery stocks of salmon and steelhead in the Columbia River Basin on the basis of currently available information. This report provides a comprehensive compilation of data on the status and life histories of Columbia Basin salmonid stocks.
Date: July 1, 1986
Creator: Howell, Philip J.
Object Type: Report
System: The UNT Digital Library
Savannah River Site computing architecture migration guide (open access)

Savannah River Site computing architecture migration guide

The SRS Computing Architecture is a vision statement for site computing which enumerates the strategies which will guide SRS computing efforts for the 1990s. Each strategy is supported by a number of feature statements which clarify the strategy by providing additional detail. Since it is a strategic planning document, the Architecture has sitewide applicability and endorsement but does not attempt to specify implementation details. It does, however, specify that a document will be developed to guide the migration from the current site environment to that envisioned by the new architecture. The goal of this document, the SRS Computing Architecture Migration Guide, is to identify specific strategic and tactical tasks which would have to be completed to fully implement the architectural vision for site computing as well as a recommended sequence and timeframe for addressing these tasks. It takes into account the expected availability of technology, the existing installed base, and interdependencies among architectural components and objectives.
Date: July 30, 1991
Creator: unknown
Object Type: Report
System: The UNT Digital Library
National hydroelectric power resources study. Preliminary inventory of hydropower resources. Volume 6. Northeast region (open access)

National hydroelectric power resources study. Preliminary inventory of hydropower resources. Volume 6. Northeast region

In the Northeast region, the physical potential for all sites exceeds 33,000 MW of capacity with an estimated average annual energy of some 153,000 GWH. By comparison, the available data represent about 6% of the total capacity and 11% of the hydroelectric energy potential estimated for the entire US. Of the total capacity estimated for the region, 6100 MW has been installed. The remainder (27,200 MW, excluding the undeveloped capacity in the New England States) is the maximum which could be developed by upgrading and expanding existing projects (18,700 MW), and by installing new hydroelectric power capacity at all potentially feasible, undeveloped sites (8500 MW). Small-scale facilities account for about 15% of the region's total installed capacity, but another 1800 MW could be added to these and other small water-resource projects. In addition, 500 MW could be installed at potentially feasible, undeveloped small-scale sites. The small-scale resource varies considerably, with the states of New York, Maine, and New Hampshire having the largest potential for incremental development at existing projects in the Northeast region. West Virginia, Maryland, Delaware, New Jersey, Pennsylvania, New York, Connecticut, Massachusetts, Rhode Island, New Hampshire, Vermont, and Maine comprise the Northeast region.
Date: July 1, 1979
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Automation of the National Water Quality Laboratories, U. S. Geological Survey. I. Description of laboratory functions and definition of the automation project (open access)

Automation of the National Water Quality Laboratories, U. S. Geological Survey. I. Description of laboratory functions and definition of the automation project

In January 1976, the Water Resources Division of the U.S. Geological Survey asked Lawrence Livermore Laboratory to conduct a feasibility study for automation of the National Water Quality (NWQ) Laboratory in Denver, Colorado (formerly Denver Central Laboratory). Results of the study were published in the Feasibility Study for Automation of the Central Laboratories, Lawrence Livermore Laboratory, Rept. UCRL-52001 (1976). Because the present system for processing water samples was found inadequate to meet the demands of a steadily increasing workload, new automation was recommended. In this document we present details necessary for future implementation of the new system, as well as descriptions of current laboratory automatic data processing and analytical facilities to better define the scope of the project and illustrate what the new system will accomplish. All pertinent inputs, outputs, and other operations that define the project are shown in functional designs.
Date: July 1, 1977
Creator: Morris, W.F. & Ames, H.S.
Object Type: Report
System: The UNT Digital Library
Direct time-domain techniques for transient radiation and scattering. [Introduction to transient electromagnetics] (open access)

Direct time-domain techniques for transient radiation and scattering. [Introduction to transient electromagnetics]

A tutorial introduction to transient electromagnetics, focusing on direct time-domain techniques, is presented. Physical, mathematical, numerical, and experimental aspects of time-domain methods, with emphasis on wire objects excited as antennas or scatters are examined. Numerous computed examples illustrate the characteristics of direct time-domain procedures, especially where they may offer advantages over procedures in the more familiar frequency domain. These advantages include greater solution efficiency for many types of problems, the ability to handle nonlinearities, improved physical insight and interpretability, availability of wide-band information from a single calculation, and the possibility of isolating interactions among various parts of an object using time-range gating.
Date: July 1, 1976
Creator: Miller, E. K. & Landt, J. A.
Object Type: Report
System: The UNT Digital Library
Radiation effects and metalloproteins studied by x-ray photoelectron spectroscopy (open access)

Radiation effects and metalloproteins studied by x-ray photoelectron spectroscopy

X-ray photoelectron spectroscopy (XPS) is used to study the bonding structure at the iron site of cytochrome c and the bonding of rare earth ions to the phosphate oxygens of ATP. Radiation effects are studied on several amino acid and simple peptide model systems. The emission spectrum of the x-ray source is calculated from literature references. The distributions of photon energy as a function of photon frequency and as a function of take-off angle are obtained. From these distributions, the radiation dose absorbed by an organic sample is found to be 10/sup 6/ rads/sec. The C 1s and N 1s spectra of amino acids and peptides are studied to characterize an internal reference standard for protein XPS spectra. Samples of native cytochrome c prepared from solutions of pH 1.5, 3, 7, and 11 are studied. Control samples include porphyrin cytochrome c (PCC), the metal free analogue of the native protein, and microperoxidase (MP), a mixture of heme peptides derived from the peptic digestion of cytochrome c. These samples show two S 2p peaks. The first peak has a binding energy (BE) of 163 eV, which corresponds to the S containing amino acids; the second peak is shifted to 167 eV. …
Date: July 1, 1975
Creator: Wurzbach, J.A.
Object Type: Report
System: The UNT Digital Library