Resource Type

Petrology and Geochemistry of Boninite Series Volcanic Rocks,Chichi-jima, Bonin Islands, Japan (open access)

Petrology and Geochemistry of Boninite Series Volcanic Rocks,Chichi-jima, Bonin Islands, Japan

An Eocene submarine boninite series volcanic center isexposed on the island of Chichi-jima, Bonin Islands, Japan. Five rocktypes, boninite, bronzite andesite, dacite, quartz dacite, and rhyolite,were distinguished within the boninite volcanic sequence on the basis ofpetrographic and geochemical observations. Boninite lavas contain highmagnesium, nickel, and chromium contentsindicative of primitive melts,but have high silica contents relative to other mantle-derived magmas.All boninite series lavas contain very low incompatible elementconcentrations, and concentrations of high-field strength elements inprimitive boninite lavas are less than half of those found in depletedmid-ocean ridge basalts. Abundances of large-ion lithophile elements arerelatively high in boninite series lavas, similar to the enrichmentsobserved in many island arc lavas. Trends for both major and traceelement data suggest that the more evolved lavas of the boninite magmaseries were derived primarily through high-level fractionalcrystallization of boninite. Textural features, such as resorption andglomeroporphyrocrysts, and reverse chemical zonations suggest that magmamixing contributed to the development of the quartz dacitelavas.
Date: January 1, 1977
Creator: Dobson, Patrick F.; Blank, Jennifer G.; Maruyama, Shigenori & Liou, J.G.
System: The UNT Digital Library
Synchrotron-based high-pressure research in materials science (open access)

Synchrotron-based high-pressure research in materials science

None
Date: unknown
Creator: unknown
System: The UNT Digital Library
Environmental research on actinide elements (open access)

Environmental research on actinide elements

The papers synthesize the results of research sponsored by DOE's Office of Health and Environmental Research on the behavior of transuranic and actinide elements in the environment. Separate abstracts have been prepared for the 21 individual papers. (ACR)
Date: August 1, 1987
Creator: Pinder, J. E., III; Alberts, J. J.; McLeod, K. W. & Schreckhise, R. G.
System: The UNT Digital Library
Multiaperture U BV RIzJHK Photometry of Galaxies in the Coma Cluster (open access)

Multiaperture U BV RIzJHK Photometry of Galaxies in the Coma Cluster

We present a set of UBV RIzJHKs photometry for 745 J +H band selected objects in a 22:5{prime} x 29:2{prime} region centered on the core of the Coma cluster. This includes 516 galaxies and is at least 80% complete to H = 16, with a spectroscopically complete sample of 111 cluster members (nearly all with morphological classification) for H < 14:5. For each object we present total Kron (1980) magnitudes and aperture photometry. As an example, we use these data to derive color-magnitude relations for Coma early-type galaxies, measure the intrinsic scatter of these relations and its dependence on galaxy mass, and address the issue of color gradients. We find that the color gradients are mild and that the intrinsic scatter about the color-magnitude relation is small ({approx} 0:05 mag in U-V and less than {approx} 0:03 in B-R, V-I, or J-K). There is no evidence that the intrinsic scatter varies with galaxy luminosity, suggesting that the cluster red sequence is established at early epochs over a range of {approx} 100 in stellar mass.
Date: December 5, 2006
Creator: Eisenhardt, P. R.; De Propris, R.; Gonzalez, A. H.; Stanford, S. A.; Dickinson, M. & Wang, M. C.
System: The UNT Digital Library
A reservoir management plan (open access)

A reservoir management plan

There are numerous documented cases of extraction of fluids from the ground causing surface subsidence. The cases include groundwater, oil and gas, as well as geothermal fluid withdrawal. A recent comprehensive review of all types of man-induced land subsidence was published by the Geological Survey of America. At the early stages of a geothermal power development project it is standard practice in most countries for an environmental impact report to be required. The possibility of geothermal subsidence has to be addressed, and usually it falls on the geophysicists and/or geologists to make some predictions. The advice given is vital for planning the power plant location and the borefield pipe and drain layout. It is not so much the vertical settlement that occurs with subsidence but the accompanying horizontal ground strains that can do the most damage to any man-made structure.
Date: June 16, 1989
Creator: Allis, R.G.
System: The UNT Digital Library
Sources of Revenue: A History of State Taxes and Fees in Texas, 1972-2013 (open access)

Sources of Revenue: A History of State Taxes and Fees in Texas, 1972-2013

Guide to the history and current status of Texas state revenue sources from the Texas Comptroller of Public Accounts.
Date: June 2014
Creator: Texas. Comptroller's Office.
System: The Portal to Texas History
Polarization of the cosmic background radiation (open access)

Polarization of the cosmic background radiation

We discuss the technique and results of a measurement of the linear polarization of the Cosmic Background Radiation. Data taken between May 1978 and February 1980 from both the northern hemisphere (Berkeley Lat. 38{sup o}N) and the southern hemisphere (Lima Lat. 12{sup o}s) over 11 declinations from -37{sup o} to +63{sup o} show the radiation to be essentially unpolarized over all areas surveyed. Fitting all data gives the 95% confidence level limit on a linearly polarized component of 0.3 mK for spherical harmonics through third order. A fit of all data to the anisotropic axisymmetric model of Rees (1968) yields a 95% confidence level limit of 0.15 mK for the magnitude of the polarized component. Constraints on various cosmological models are discussed in light of these limits.
Date: August 1, 1980
Creator: Lubin, Philip M. & Smoot, George F.
System: The UNT Digital Library
Critical evaluation of total half-lives of selected ground state radionuclides (open access)

Critical evaluation of total half-lives of selected ground state radionuclides

The half-lives of a number of selected ground state radioactive nuclides have been evaluated and values have been recommended with uncertainties. These are all preliminary recommendations.
Date: September 1, 1993
Creator: Holden, N. E.
System: The UNT Digital Library
CHANGES IN 137 CS CONCENTRATIONS IN SOIL AND VEGETATION ON THE FLOODPLAIN OF THE SAVANNAH RIVER OVER A 30 YEAR PERIOD (open access)

CHANGES IN 137 CS CONCENTRATIONS IN SOIL AND VEGETATION ON THE FLOODPLAIN OF THE SAVANNAH RIVER OVER A 30 YEAR PERIOD

{sup 137}Cs released during 1954-1974 from nuclear production reactors on the Savannah River Site, a US Department of Energy nuclear materials production site in South Carolina, contaminated a portion of the Savannah River floodplain known as Creek Plantation. {sup 137}Cs activity concentrations have been measured in Creek Plantation since 1974 making it possible to calculate effective half-lives for {sup 137}Cs in soil and vegetation and assess the spatial distribution of contaminants on the floodplain. Activity concentrations in soil and vegetation were higher near the center of the floodplain than near the edges as a result of frequent inundation coupled with the presence of low areas that trapped contaminated sediments. {sup 137}Cs activity was highest near the soil surface, but depth related differences diminished with time as a likely result of downward diffusion or leaching. Activity concentrations in vegetation were significantly related to concentrations in soil. The plant to soil concentration ratio (dry weight) averaged 0.49 and exhibited a slight but significant tendency to decrease with time. The effective half-lives for {sup 137}Cs in shallow (0-7.6 cm) soil and in vegetation were 14.9 (95% CI = 12.5-17.3) years and 11.6 (95% CI = 9.1-14.1) years, respectively, and rates of {sup 137}Cs …
Date: December 12, 2007
Creator: Paller, M.; Jannik, T. & Fledderman, P.
System: The UNT Digital Library
Helium trapping at Ti-rich MC particles in Ti-modified austenitic stainless steel (open access)

Helium trapping at Ti-rich MC particles in Ti-modified austenitic stainless steel

Helium trapping by Ti-rich MC particles is characterized by first, the formation of a high concentration of tiny cavities at the interfaces and secondly, a cavity denuded zone that extends into the surrounding matrix. Very few cavities form on other phases in the system when MC is present. The trapping is effective in HFIR from at least 370 to 600/sup 0/C. The phases produced in unmodified steel do not exhibit this type of strong helium trapping. This trapping helps minimize the swelling for a given amount of helium. Compositionally, MC is strongly enriched in Ti, Mo, V, and Nb and depleted in Si, Ni, Cr, and Fe, both thermally and after irradiation in HFIR. The compositional behavior of MC is unusual because phases that are stabilized by irradiation are generally enriched in Si and/or Ni. The data are obtained using quantitative x-ray EDS for particles on extraction replicas. The microstructural and compositional information is examined with respect to concepts or trends from several theories to begin to understand the nature of the helium trapping.
Date: January 1, 1980
Creator: Maziasz, P. J.
System: The UNT Digital Library
Review of {alpha}{sub s} measurements (open access)

Review of {alpha}{sub s} measurements

Determinations of {alpha}{sub s} are reviewed. Current results are limited to a precision of around 3--20%, largely by theoretical uncertainties. All measurements are consistent with a world average value of 0.118 {+-} 0.005 and there is no evidence of any discrepancy between low-Q{sup 2} and high-Q{sup 2} results. 71 refs., 1 fig., 1 tab.
Date: October 1, 1996
Creator: Burrows, P.N.
System: The UNT Digital Library
Progress Report 15, December 1979-April 1980, and proceedings of the fifteenth Project Integration Meeting (open access)

Progress Report 15, December 1979-April 1980, and proceedings of the fifteenth Project Integration Meeting

Progress made by the Low-Cost Solar Array Project during the period December 1979 to April 1980 is reported. Reports on project analysis and integration; technology development in silicon material, large-area silicon sheet and encapsulation; production process and equipment development; engineering; and operations are included. Also, a report on, and copies of visual presentations made at, the Project Integration Meeting held April 2 and 3, 1980, are included.
Date: January 1, 1980
Creator: unknown
System: The UNT Digital Library
Evidence for glueballs (open access)

Evidence for glueballs

This paper describes the observation and partial wave analysis of 1203 (22 GeV) ..pi../sup -/p ..-->.. phi phi n events. This is an OZI suppressed channel in which the OZI suppression is found to be absent. Assuming QCD and the OZI rule as Ansatzen, it is concluded that the breakdown of the OZI suppression is due to glueballs. The g/sub T/(2160) and the g/sub T/(2320) with I/sup G/J/sup PC/ = 0/sup +/2/sup + +/ are two resonances determined from the partial wave analysis. It is concluded that one or two primary glueballs with the above quantum numbers are responsible for the observed two states. A brief discussion of other glueball candidates and some relevant phenomenology is also included.
Date: January 1, 1982
Creator: Lindenbaum, S. J.
System: The UNT Digital Library
Gas Geothermometry Based on CO Content--Application in Italian Geothermal Fields (open access)

Gas Geothermometry Based on CO Content--Application in Italian Geothermal Fields

This paper discusses gas chemical equilibria in geothermal reservoirs involving the species CO{sub 2}, CH{sub 4}, CO, H{sub 2}S, H{sub 2}, and H{sub 2}O. A set of equations is developed correlating ratios of gas to CO{sub 2} with temperature, steam fraction, and CO{sub 2} partial pressure in the reservoir. A method for solving the set of nonlinear equations is proposed. These equations do not involve discharge gas/total H{sub 2}O ratios and may therefore be used for fumaroles and hot-spring fluids. Applications to fumarole and well-discharge fluid compositions in Italian geothermal fields show good correlations between temperatures calculated with this method and the temperatures measured in the reservoir (between 140° to 330°C). 5 tabs., 1 fig., 19 refs.
Date: January 20, 1987
Creator: D'Amore, F.; Fancelli, R.; Saracco, L. & Truesdell, A.H.
System: The UNT Digital Library
Soil Diversity as Affected by Land Use in China: Consequences for Soil Protection (open access)

Soil Diversity as Affected by Land Use in China: Consequences for Soil Protection

This article reports the first effort to assess the impact of land-use change on soil diversity for the entire nation of China.
Date: April 21, 2014
Creator: Shangguan, Wei; Gong, Peng; Liang, Lu; Dai, Yongjiu & Zhang, Keli
System: The UNT Digital Library
Estimation, forecasting, and multiplier-simulation analyses of industrial demand for electricity in the United States (open access)

Estimation, forecasting, and multiplier-simulation analyses of industrial demand for electricity in the United States

This paper discusses the specification of electricity demand and price equations for manufacturing industries and presents empirical results, based on the data for 16 Standard Industrial Classification (SIC) three-digit industries from 1959 to 1976. Performances of estimated coefficients for the equations are evaluated by sample-period simulation tests. The estimated coefficients are then used to forecast electricity demand by industry and also to conduct multiplier-simulation analysis. Preliminary results show that most of the estimated coefficients have the expected signs and are statistically significant. The estimated equations perform well in terms of sample-period simulation tests, registering small mean absolute percentage errors and mean square percentage errors. Forecasted results indicate that total electricity demand for the sector will grow at an average annual rate of 3.4% from 1977 to 1990 with a wide range of variation in the growth rates of individual industries. Results from multiplier simulation analyses reveal that changes in the price of natural gas, the value added, and the costs of generating electricity will affect future industrial demand for electricity substantially.
Date: January 1, 1979
Creator: Chang, H S & Chern, W S
System: The UNT Digital Library
Correlation and Estimation of Aqueous Solubilities of Polycyclic Aromatic Hydrocarbons (open access)

Correlation and Estimation of Aqueous Solubilities of Polycyclic Aromatic Hydrocarbons

Article on the correlation and estimation of aqueous solubilities of polycyclic aromatic hydrocarbons.
Date: 1984
Creator: Baker, Ronald J.; Acree, William E. (William Eugene) & Tsai, Chun-che
System: The UNT Digital Library
Calculating the inventory of solvent extraction columns for material balances without shutdown (open access)

Calculating the inventory of solvent extraction columns for material balances without shutdown

This study demonstrates a feasible way to determine the nuclear material inventory of solvent extraction columns for calculating material balances without process shutdowns. An existing computer code, SEPHIS, was used to calculate the inventories in the solvent extraction cycles of a uranium recovery process. The applicability of the method was tested using published data on the uranium concentration profiles of solvent extraction pulse columns. The application of this method to the extraction cycles of the uranium recovery process is presented for daily uranium loss monitoring over those process units.
Date: July 1, 1981
Creator: Brouns, R. J.; Davenport, L. C. & Richardson, G. L.
System: The UNT Digital Library
Waste Isolation Safety Assessment Program. Task 4. Third Contractor Information Meeting. [Adsorption-desorption on geological media] (open access)

Waste Isolation Safety Assessment Program. Task 4. Third Contractor Information Meeting. [Adsorption-desorption on geological media]

The study subject of this meeting was the adsorption and desorption of radionuclides on geologic media under repository conditions. This volume contans eight papers. Separate abstracts were prepared for all eight papers. (DLC)
Date: June 1, 1980
Creator: unknown
System: The UNT Digital Library
A Bottom-Up Engineering Estimate of the Aggregate Heating and Cooling Loads of the Entire U.S. Building Stock (open access)

A Bottom-Up Engineering Estimate of the Aggregate Heating and Cooling Loads of the Entire U.S. Building Stock

A recently completed project for the U.S. Department of Energy's (DOE) Office of Building Equipment combined DOE-2 results for a large set of prototypical commercial and residential buildings with data from the Energy Information Administration (EIA) residential and commercial energy consumption surveys (RECS, CBECS) to estimate the total heating and cooling loads in U.S. buildings attributable to different shell components such as windows, roofs, walls, etc., internal processes, and space-conditioning systems. This information is useful for estimating the national conservation potentials for DOE's research and market transformation activities in building energy efficiency. The prototypical building descriptions and DOE-2 input files were developed from 1986 to 1992 to provide benchmark hourly building loads for the Gas Research Institute (GRI) and include 112 single-family, 66 multi-family, and 481 commercial building prototypes. The DOE study consisted of two distinct tasks : (1) perform DOE-2 simulations for the prototypical buildings and develop methods to extract the heating and cooling loads attributable to the different building components; and (2) estimate the number of buildings or floor area represented by each prototypical building based on EIA survey information. These building stock data were then multiplied by the simulated component loads to derive aggregated totals by region, …
Date: August 1, 2000
Creator: Huang, Yu Joe & Brodrick, Jim
System: The UNT Digital Library
Testing the potential model in the UPSILON system (open access)

Testing the potential model in the UPSILON system

Tests of the non-relativistic potential model for bound b anti b states are discussed, using results from the Crystal Ball and ARGUS detectors at DORIS II (DESY) and the CUSB and CLEO detectors at CESR (Cornell). There are many many people who have developed potential models. While the author tries to be complete in reviewing the experimental data, he limits his discussion of potentials to a few contrasting examples. The talk is divided into two main parts. In the first he discusses the /sup 3/S/sub 1/ b anti b states UPSILON, UPSILON', ..., whose measured masses, leptonic widths, and leptonic branching ratios are used to check the static potential V(r) and the strong coupling constant ..cap alpha../sub 3/. In the second part, results on the /sup 3/P, b anti b states chi/sub b/, chi'/sub b/ are used to check the spin dependence of the potential. There are several other classes of states (c anti c, s anti s, c anti q, b anti q, and the as-yet-not seen eta/sub b/ and /sup 1/P/sub 1/ of the b anti b family) which are also important in testing the potential model, but which he did not cover in this talk. 47 references.
Date: January 1, 1985
Creator: Cooper, S.
System: The UNT Digital Library
Total half-lives for selected nuclides (open access)

Total half-lives for selected nuclides

Measurements of the half-lives of {sup 3}H, {sup 10}Be, {sup 14}C, {sup 26}Al, {sup 40}K, {sup 39}Ar, {sup 53}Mn, {sup 87}Rb, {sup 92}Nb, {sup 129}I, {sup 138}La, {sup 147}Sm, {sup 176}Lu, {sup 174}Hf, {sup 180}Ta, {sup 187}Re, {sup 186}Os, {sup 190}Pt, {sup 204}Pb, {sup 210}Pb, {sup 210}Po, {sup 222}Rn, {sup 224}Th, {sup 226}Ra, {sup 227}Ac, {sup 228}Ra, {sup 228}Th, {sup 230}Th, {sup 232}Th, {sup 231}Pa have been compiled and evaluated. The effect of the {sup 14}C half-life value on carbon dating ages is discussed as well as the stability of {sup 204}Pb. 237 refs., 30 tabs.
Date: January 1, 1989
Creator: Holden, Norman E.
System: The UNT Digital Library
Microscopic calculations of {lambda} single-particle energies. (open access)

Microscopic calculations of {lambda} single-particle energies.

{Lambda} binding energy data for total baryon number A {le} 208 and for {Lambda} angular momenta {ell}{sub {Lambda}} {le} 3 are analyzed in terms of phenomenological (but generally consistent with meson-exchange) {Lambda}N and {Lambda}NN potentials. The Fermi-Hypernetted-Chain technique is used to calculate the expectation values for the {Lambda} binding to nuclear matter. Accurate effective {Lambda}N and {Lambda}NN potentials are obtained which are folded with the core nucleus nucleon densities to calculate the {Lambda} single particle potential U{sub {Lambda}}(r). We use a dispersive {Lambda}NN potential but also include an explicit {rho} dependence to allow for reduced repulsion in the surface, and the best fits have a large {rho} dependence giving consistency with the variational Monte Carlo calculations for {sub {Lambda}}{sup 5}He. The exchange fraction of the {Lambda}N space-exchange potential is found to be 0.2-0.3 corresponding to m{sub {Lambda}}* {approx_equal} (0.74-0.82)m{sub {Lambda}}. Charge symmetry breaking is found to be significant for heavy hypernuclei with a large neutron excess, with a strength consistent with that obtained from the A = 4 hypernuclei.
Date: February 12, 1998
Creator: Usmani, Q. N.
System: The UNT Digital Library
Competitive sorption of cadmium and lead in acid soils of central Spain (open access)

Competitive sorption of cadmium and lead in acid soils of central Spain

The bioavailability and ultimate fate of heavy metals in the environment are controlled by chemical sorption. To assess competitive sorption of Pb and Cd, batch equilibrium experiments (generating sorption isotherms) and kinetics sorption studies were performed using single and binary metal solutions in surface samples of four soils from central Spain. For comparisons between soils, as well as, single and binary metal solutions, soil chemical processes were characterized using the Langmuir equation, ionic strength, and an empirical power function for kinetic sorption. In addition, soil pH and clay mineralogy were used to explain observed sorption processes. Sorption isotherms were well described by the Langmuir equation and the sorption kinetics were well described by an empirical power function within the reaction times in this study. Soils with higher pH and clay content (characterized by having smectite) had the greatest sorption capacity as estimated by the maximum sorption parameter (Q) of the Langmuir equation. All soils exhibited greater sorption capacity for Pb than Cd and the presence of both metals reduced the tendency for either to be sorbed although Cd sorption was affected to a greater extent than that of Pb. The Langmuir binding strength parameter (k) was always greater for Pb …
Date: January 30, 2004
Creator: Serrano, S.; Garrido, F.; Campbell, C. G. & Garcia-Gonzolez, Maria Teresa
System: The UNT Digital Library