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In –Situ Spectroscopic Investigation of Immobilized Organometallic Catalysts

Description: Immobilized organometallic catalysts, in principle, can give high rates and selectivities like homogeneous catalysts with the ease of separation enjoyed by heterogeneous catalysts. However, the science of immobilized organometallics has not been developed because the field lies at the interface between the homogeneous and heterogeneous catalysis communities. By assembling an interdisciplinary research team that can probe all aspects of immobilized organometallic catalyst design, the entire reac… more
Date: November 14, 2007
Creator: Davis, Robert, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fundamentals of Energy Transport in Nanofluids

Description: We performed computational simulations and theoretical analysis to investigate the underlying origins of large thermal conductivity enhancements observed in nanofluids (colloidal suspensions of solid nanoparticles and/or nanofibers in thermal fluids) and to identify strategies towards tailoring nanofluids for better thermal performance.
Date: February 25, 2007
Creator: Keblinski, Pawel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Numerical modeling of the origin of calcite mineralization in the Refugio-Carneros fault, Santa Barbara Basin, California: GEOFLUIDS, vol. 7, p. 79-95, 2007.

Description: Many faults in active and exhumed hydrocarbon-generating basins are characterized by thick deposits of carbonate fault cement of limited vertical and horizontal extent. Based on fluid inclusion and stable isotope characteristics, these deposits have been attributed to upward flow of formation water and hydrocarbons. The present study sought to test this hypothesis by using numerical reactive transport modeling to investigate the origin of calcite cements in the Refugio-Carneros fault located on… more
Date: February 1, 2007
Creator: Appold, M. S.; Garven, G.; Boles, J. R. & Eichhubl, P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Indiana Humanities Council Request for the Indianapolis Energy Conversion Inst. For Phase I of the Indianapolis Energy Conservation Res Initiative also called the smartDESKTOP Initiative

Description: The smartDESKTOP Initiative at the Indiana Humanities Council received critical support in building and delivering a “digital desktop” for Indiana educators through the Department of Energy Grant—DE-FG02-06ER64282. During the project period September 2006 through October of 2007, the number of Indiana educators with accounts on the smartDESKTOP more than tripled from under 2,000 to more than 7,000 accounts. An external review of the project conducted for the purposes of understanding the … more
Date: December 6, 2007
Creator: Keller, John B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

International Symposium on Free Radicals - August 12 - 17, 2007

Description: This grant provided partial support for the 29th International Symposium on Free Radicals, held August 12-17, 2007 at the Big Sky Resort in Big Sky, Montana. This meeting dates back to 1956, and is thepremier international meeting focusing on the structure and dynamics of reactive free radicals. Free radicals and other reactive species remain topics of great interest today owing to the central role they play as reactive intermediates. Of particular relevance to the DOE mission in Basic Energy S… more
Date: August 17, 2007
Creator: Continetti, Robert E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Collaborative Research: Evolution of Pore Structure and Permeability of Rocks Under Hydrothermal Conditions

Description: The physical and transport properties of porous rocks can be altered by a variety of diagenetic, metamorphic, and tectonic processes, and the changes that result are of critical importance to such industrial applications as resource recovery, carbon dioxide sequestration, and waste isolation in geologic formations. These inter-relationships between rocks, pore fluids, and deformation are also the key to understanding many natural processes, including: dynamic metamorphism, fault mechanics, faul… more
Date: April 15, 2007
Creator: Zhu, Wenlu & Evans, J. Brian
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Precision Measurement of the proton neutral weak form factors at Q{sup 2} ~ 0.1 GeV{sup 2}

Description: This thesis reports the HAPPEX measurement of the parity-violating asymmetry for longitudinally polarized electrons elastically scattered from protons in a liquid hydrogen target. The measurement was carried out in Hall A at Thomas Jefferson National Accelerator Facility using a beam energy E = 3 GeV and scattering angle <θ{sub lab}> = 6◦. The asymmetry is sensitive to the weak neutral form factors from which we extract the strange quark electric and magnetic form factors (G{sup s}{sub E} and G… more
Date: February 1, 2007
Creator: Kaufman, Lisa
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

On the Physics of Galvanic Source Electromagnetic Geophysical Methods for Terrestrial and Marine Exploration

Description: A numerical study was conducted to investigate the governing physics of galvanic source electromagnetic (EM) methods for terrestrial and marine exploration scenarios. The terrestrial exploration scenario involves the grounded electric dipole source EM (GESTEM) method and the examination of how the GESTEM method can resolve a thin resistive layer representing underground gas and/or hydrocarbon storage. Numerical modeling studies demonstrate that the loop transient EM (TEM) and magnetotelluric (M… more
Date: June 27, 2007
Creator: Um, David Alumbaugh and Evan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Membrane-Organized Chemical Photoredox Systems

Description: This project has three interrelated goals relevant to solar water photolysis, which are to develop: (1) vesicle-organized assemblies for H2 photoproduction that utilize pyrylium and structurally related compounds as combined photosensitizers and cyclic electroneutral transmembrane electron carriers; (2) transmembrane redox systems whose reaction rates can be modulated by light; and (3) homogeneous catalysts for water oxidation. In area (1), initial efforts to photogenerate H2 from vectorially-o… more
Date: May 15, 2007
Creator: Hurst, James K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Standard Data Exchanges for Distribution System Management

Description: Databases and software tools for electric power distribution systems have not been integrated, and this leads to extra costs and restrictions imposed on utilities and other stakeholders. For example, distributed resource integration studies and modern grid technology assessments are more difficult and costly. New vendors face high market entry barriers, because it’s necessary to interface with large and customized data systems at each potential utility customer. This project promotes data and s… more
Date: October 5, 2007
Creator: McDermott, Thomas E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanisms underlying the adaptive response against spontaneous neoplastic transformation induced by low doses of low LET radiation - Final Technical Report

Description: The objective of the research was to examine mechanisms underlying the suppressive effects of low doses (<10 cGy) of low-LET radiation on the endpoint of neoplastic transformation in vitro. The findings indicated a role for upregulation of DNA repair but not of antioxidants.
Date: January 17, 2007
Creator: Redpath, John Leslie
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

GEOCENTRIFUGE STUDIES OF FLOW AND TRANSPORT IN POROUS MEDIA, FINAL REPORT FOR GRANT NUMBER DE-FG02-03ER63567 TO THE UNIVERSITY OF IDAHO (RW SMITH), ENVIRONMENTAL MANAGEMENT SCIENCE PROGRAM PROJECT NUMBER 86598, COUPLED FLOW AND REACTIVITY IN VARIABLY SATURATED POROUS MEDIA

Description: Improved models of contaminant migration in heterogeneous, variably saturated porous media are required to better define the long-term stewardship requirements for U.S. Department of Energy (DOE) lands and to assist in the design of effective vadose-zone barriers to contaminant migrations. The development of these improved models requires field and laboratory results to evaluate their efficacy. However, controlled laboratory experiments simulating vadose conditions can require extensive period … more
Date: June 15, 2007
Creator: Smith, Robert W.; Palmer, Carl D. & Mattson, Earl D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Disruption mitigation using high pressure gas jets

Description: The goal of this research is to establish credible disruption mitigation scenarios based on the technique of massive gas injection. Disruption mitigation seeks to minimize or eliminate damage to internal components that can occur due to the rapid dissipation of thermal and magnetic energy during a tokamak disruption. In particular, the focus of present research is extrapolating mitigation techniques to burning plasma experiments such as ITER, where disruption-caused damage poses a serious threa… more
Date: October 11, 2007
Creator: Whyte, Dennis G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

LDA Calculations of Dislocation Mobility in Fe & Mo

Description: This Project was a collaborative effort between Murray Daw (Clemson) and Daryl Chrzan (LBNL/UCB). The main goal of this project was to accomplish the first-ever first principles calculations of the structure of the screw dislocation in Fe and to study the effects of stress and magnetization. The calculations were completed and reported at conferences. During the work on this project, the collaboration also tackled an important related question - the effect of periodic boundary conditions in dis… more
Date: July 13, 2007
Creator: Daw, Murray S. & Chrzan, Daryl
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Measurement of the Neutron electric form factor at Q2=0.8 2(GeV\\c)

Description: Nucleon form factors allow a sensitive test for models of the nucleon. Recent experiments utilising polarisation observables have resulted, for the first time, in a model-independent determination of the neutron electric form factor GnE. This method employed an 80% longitudinally polarised, high intensity (10 uA) electon beam (883 MeV) that was quasi-elastically scattered off a liquid deuterium target in the reaction D (e, en)p. A neutron polarimeter was designed and installed to measure the ra… more
Date: September 30, 2007
Creator: Glazier, Derek
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Final Report - From Measurements to Models: Cross-Comparison of Measured and Simulated Behavioral States of the Atmosphere

Description: The ARM sites and the ARM Mobile Facility (AMF) were constructed to make measurements of the atmosphere and radiation system in order to quantify deficiencies in the simulation of clouds within models and to make improvements in those models. While the measurement infrastructure of ARM is well-developed and a model parameterization testbed capability has been established, additional effort is needed to develop statistical techniques which permit the comparison of simulation output from atmosphe… more
Date: October 22, 2007
Creator: Del Genio, Anthony D; Hoffman, Forrest M & Hargrove, Jr, William W
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis and Calibration of CRF Raman Lidar Cloud Liquid Water Measurements

Description: The Atmospheric Radiation Measurement (ARM) Raman lidar (RL), located at the Southern Great Plains (SGP) Climate Research Facility (CRF), is a unique state-of-the-art active remote sensor that is able to measure profiles of water vapor, aerosol, and cloud properties at high temporal and vertical resolution throughout the diurnal cycle. In October 2005, the capability of the RL was extended by the addition of a new detection channel that is sensitive to the Raman scattering of liquid water. This… more
Date: October 31, 2007
Creator: Turner, D.D. Whiteman, D.N. Russo, F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Final Report of MBX experiment

Description: The MBX experiment was built during the grant period. Details can be found in publications about MBX experiment. We created a low density plasma in a mirror configuration and rotated it at supersonic speeds in the theta direction. Under these conditions the plasma presents a high asymmetry in the current, plasma potential and consequently rotation with the voltage applied. We developed a two fluid model to describe the measurements based on a magnetofluid states ansatz. We also observed bistabl… more
Date: April 2, 2007
Creator: Bengtson, Roger D & Valanju, Prashant
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser-Produced Coherent X-Ray Sources

Description: We study the generation of x-rays from the interaction of relativistic electrons with ultra-intense laser pulse either directly or via laser generated ion channels. The laser pulse acts as the accelerator and wiggler leading to an all-optical synchrotron-like x-ray source. The mm sized accelerator and micron-sized wiggler leads to a compact source of high brightness, ultrafast x-rays with applications in relativistic nonlinear optics, ultrafast chemistry, biology, inner-shell electronic process… more
Date: January 31, 2007
Creator: Umstadter, Donald
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nanoscopic Study of the Polarization-Strain Coupling in Relaxor Ferroelectric and the Search for New Relaxor Materials for Transducer and Optical Applications

Description: SUMMARY Relaxor ferroelectrics exhibit a very unusual polarization behavior from which derive unique electrostrictive, piezoelectric and other properties. This behavior and these properties are due to the presence of nanoscale structural and polar order, the polar nanoregions (PNR), which can easily reorient under very modest external electric field, in stark contrast with conventional ferroelectrics. Moreover, when these nanoregions are aligned, their local distortions add up coherently to a m… more
Date: May 31, 2007
Creator: Toulouse, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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