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The Geochemical Earth Reference Model (GERM)

Description: The Geochemical Earth Reference Model (GERM) initiative is a grass- roots effort with the goal of establishing a community consensus on a chemical characterization of the Earth, its major reservoirs, and the fluxes between them. Long term goal of GERM is a chemical reservoir characterization analogous to the geophysical effort of the Preliminary Reference Earth Model (PREM). Chemical fluxes between reservoirs are included into GERM to illuminate the long-term chemical evolution of the Earth and to characterize the Earth as a dynamic chemical system. In turn, these fluxes control geological processes and influence hydrosphere-atmosphere-climate dynamics. While these long-term goals are clearly the focus of GERM, the process of establishing GERM itself is just as important as its ultimate goal. The GERM initiative is developed in an open community discussion on the World Wide Web (GERM home page is at http://www-ep.es.llnl. gov/germ/germ-home.html) that is mediated by a series of editors with responsibilities for distinct reservoirs and fluxes. Beginning with the original workshop in Lyons (March 1996) GERM is continued to be developed on the Internet, punctuated by workshops and special sessions at professional meetings. It is planned to complete the first model by mid-1997, followed by a call for papers for a February 1998 GERM conference in La Jolla, California.
Date: December 1, 1996
Creator: Staudigel, H.; Albarede, F.; Shaw, H.; McDonough, B. & White, W.
Partner: UNT Libraries Government Documents Department
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Earth, Rotation of

Description: Encyclopedia article entry in the Encyclopedia of Time: Science, Philosophy, Theology, and Culture by H. James Birx. This encyclopedia article discusses the rotation of the earth.
Date: 2009
Creator: O'Toole, Erin
Partner: UNT Libraries
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Superposition in the Interpretation of Two-Layer Earth-Resistivity Curves

Description: From abstract: A method is presented for the interpretation of data on electrical resistivity by the superposition of standard reference curves on those obtained from field observations. This method is applicable where bedrock whose average resistivity is essentially uniform is overlain by overburden whose average resistivity is also uniform but markedly distinct.
Date: 1941
Creator: Roman, Irwin
Partner: UNT Libraries Government Documents Department
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The Y-Nd and Sc-Nd Phase Systems

Description: Technical report. From Introduction : "In a recent study by Spedding, et al. on some rare earth alloy systems, an intermediate phase was found to form when a light rare earth (ABAC stacking) was alloyed with a heavy rare earth (ABAC stacking). This intermediate phase was found to have the structure of samarium metal with the stacking ABABCBCAC and was designated "delta". Since the cause of this rather unusual structure occurring in either samarium metal or these alloys is not known the study of these phases as some of their properties is continuing in the Ames Laboratory. It was the purpose of the present study to extend our knowledge of the composition and more of formation of these phases."
Date: February 1964
Creator: Beaudry, B. J.; Michel, M.; Daane, A. H. & Spedding, F. H.
Partner: UNT Libraries Government Documents Department
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Computational s-Block Thermochemistry with the Correlation Consistent Composite Approach

Description: Article discussing research on computational s-block thermochemistry with the correlation consistent composite approach, which has been shown to accurately compute gas-phase enthalapies of formation for alkali and alkaline earth metal oxides and hydroxides.
Date: October 3, 2007
Creator: DeYonker, Nathan J.; Ho, Dustin S.; Wilson, Angela K. & Cundari, Thomas R., 1964-
Partner: UNT College of Arts and Sciences
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Final Report for proposal "The Interface between Earth System Models and Impacts on Society Workshop, Spring 2011

Description: The creation of a new Community Earth System Model (CESM) working group, combining science-driven research with user-driven requirements, will further broaden the CESM user base and will considerably enrich the project by building formal links to sectoral scientists and decision makers. The first step in this process is a small (~25 person) workshop to identify the goals and objectives of the new working group, to discuss how it will interact with existing CESM working groups, and to identify a few, initial pilot projects to explore how to use climate information to manage climate risk more effectively. This proposal is to support the travel costs of non-NCAR participants in this planning workshop.
Date: June 12, 2012
Creator: Hurrell, Jim
Partner: UNT Libraries Government Documents Department
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Magnetic Properties of Some Intra-Rare Earth Alloys

Description: Technical report. From Abstract : "Paramagnetic susceptibilities of samarium structure alloys in the systems La-Gd, Nd-Y, Nd-Tm, and Ce-Y were measured from 4.2 - 300°K to determine what effect the formation of this structure has on the magnetic properties of the alloys. Susceptibility maxima were observed in the Nd-Y and Nd-Tm alloys, at 34.5 and 28.5°K, respectively. Slope changes were observed in the curve of 1/x versus T for the La-Gd alloy at 155 and 130°K, and the susceptibility of this alloy remained temperature-independent from 130-7°K. A rather poorly defined region of constant susceptibility was also observed or the Ce-Y alloy, from 26-37°K. Above these transition temperatures, the alloys obeyed the Curie-Weiss law, the susceptibilities of the La-Gd and Ce-Y samples indicating the possibility of electron transfer occurring in these cases."
Date: September 10, 1962
Creator: Roughan, P. E. & Deane, A. H.
Partner: UNT Libraries Government Documents Department
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An Overview of NASA's Mission to Planet Earth (MTPE)

Description: Mission to Planet Earth (MTPE) is the National Aeronautics and Space Administration's (NASA) central contribution to the U.S. Global Change Research Program (USGCRP). The MTPE program provides scientific information so policymakers and scientists can formulate strategies to mitigate human impacts on Earth's environment, such as ozone depletion, deforestation, and possible global warming.
Date: March 1, 1995
Creator: Radzanowski, David P. & Garber, Stephen J.
Partner: UNT Libraries Government Documents Department
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Formation Constants of the Complex Species Formed by Interaction of Rare-Earth Nitrilotriacetate Complexes with an Equivalent Amount of Base

Description: From abstract: "The formation constants of the RChOH- species, formed by interaction of individual rare-earth nitrilotriacetate species and KOH at 25°C and an ionic strength of 0.1, have been determined by the potentiometric method, i.e., computed from the pH values of equilibrium mixtures containing varying proportions of rare-earth complex and base. The relationship of these constants to the ion-exchange separation of rare earths at high pH has been discussed."
Date: April 13, 1962
Creator: Guptak, Asim K. & Powell, Jack E.
Partner: UNT Libraries Government Documents Department
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Radiation from hard objects

Description: The inference of the diameter of hard objects is insensitive to radiation efficiency. Deductions of radiation efficiency from observations are very sensitive - possibly overly so. Inferences of the initial velocity and trajectory vary similarly, and hence are comparably sensitive.
Date: February 1, 1997
Creator: Canavan, G. H.
Partner: UNT Libraries Government Documents Department
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Development of Empirical Equations for Predicting Depth of an Earth-Penetrating Projectile.

Description: An empirical equation is developed for prediction of total depth of penetration of a projectile in many earth targets. The equation development was based on approximately 200 full-scale penetrations tests into a variety of targets, including rock, sandstone, gypsite, permafrost, ice, desert alluvium, silt, sand and saturated clay.
Date: January 1, 1967
Creator: Young, C.W.
Partner: UNT Libraries Government Documents Department
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Rammed Earth Walls for Buildings.

Description: Describes how to construct a building that uses rammed earth for walls.
Date: May 1937
Creator: Betts, M. C. (Morris Cotgrave), 1875-1936 & Miller, T. A. H. (Thomas Arrington Huntington), 1885-
Partner: UNT Libraries Government Documents Department
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Fuller's Earth

Description: For Introduction: "For these reasons an investigation of the mining, preparation, and use of fuller's earth in this country, especially in its application to edible oils, was conducted in order to ascertain why our own raw material has been deemed inapplicable to our needs."
Date: 1913
Creator: Parsons, Charles L.
Partner: UNT Libraries Government Documents Department
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Solar Turbulence in Earth's Global and Regional Temperature Anomalies

Description: This article presents a study of the influence of solar activity on the earth's temperature. In particular, the authors focus on the repercussion of the fluctuations of the solar irradiance on the temperature of the Northern and Southern hemispheres as well as on land and ocean regions.
Date: February 26, 2004
Creator: Scafetta, Nicola; Grigolini, Paolo; Imholt, Timothy; Roberts, James A. & West, Bruce J.
Partner: UNT College of Arts and Sciences
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The role of carbon and temperature in determining electrical conductivity of basins, crust and mantle. Progress report, July 1, 1992--December 31, 1992

Description: Initial phase was concentrated on improving electron microprobe techniques for carbon mapping of polished sections. Experiments were carried out on the utility of Au/Pd, Cr, and Ag coats; results shows that Cr and Ag gave good results. Observations were made on maps of carbon distribution in rocks; low magnification base maps consisting of a mosaic of BSE images were produced on the SEM, and traverses were plotted. The metamorphic rocks adjacent to the Denali fault were chosen for study.
Date: December 31, 1992
Creator: Mathez, E.
Partner: UNT Libraries Government Documents Department
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Energy Level Structure and Transition Probabilities in the Spectra of the Trivalent Lanthanides in LaF₃

Description: Two types of correlations with experimental results are reported. For even-f-electron systems, a center of gravity was computed based on the energies of the observed states, and calculated optimized sets of atomic energy level parameters. For odd-electron systems complete crystal field calculations were performed in which parameters of both the atomic and crystal-field parts of the interaction were adjusted to experimental data. The result is a set of eigenvectors for all the ionic states in each configuration. Spectroscopic results for all lanthanides doped into LaF3 (In³⁺ +/:LaF3) except Pm³⁺ and Eu³⁺ are reported.
Date: 1978
Creator: Carnall, W. T.; Crosswhite, H. M. & Crosswhite, H. M.
Partner: UNT Libraries Government Documents Department
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