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Proceedings of the Eighth DOE Solar Photochemistry Research Conference Held at Interlaken Conference Center, Lake Geneva, Wisconsin, June 11-14, 1984

Description: These annual meetings bring together contractors of the Division of Chemical Sciences in its basic research program on solar photochemical energy conversion to exchange information and to give interested government officials an opportunity to assess the current status of the program. This year's meeting was joined by 12 Canadian scientists with similar interests in solar photochemistry. This volume contains the program of the meeting, a list of attendees, the abstracts of 29 formal presentation… more
Date: November 1984
Creator: Argonne National Laboratory
Partner: UNT Libraries Government Documents Department
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Chaotic Vibrations of Nonlinearly Supported Tubes in Crossflow

Description: By means of the unsteady-flow theory and a bilinear mathematical model, a theoretical study is presented for chaotic vibrations associated with the fluid-elastic instability of nonlinearly supported tubes in a crossflow. Effective tools, including phase portraits, power spectral density, Poincare maps, Lyapunov exponent, fractal dimension, and bifurcation diagrams, are utilized to distinguish periodic and chaotic motions when the tubes vibrate in the instability region. The results show periodi… more
Date: February 1992
Creator: Cai, Y. & Chen, Shoei-Sheng
Partner: UNT Libraries Government Documents Department
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Motion-Dependent Fluid Forces Acting on Tube Arrays in Crossflow

Description: Motion-dependent fluids forces acting on a tube array were measured as a function of excitation frequency, excitation amplitude, and flow velocity. Fluid-damping and fluid-stiffness coefficients were obtained from measured motion-dependent fluid forces as a function of reduced flow velocity and excitation amplitude. The water channel and test setup provide a sound facility for obtaining key coefficients for fluid-elastic instability of tube arrays in crossflow. Once the guideline, based on the … more
Date: June 1993
Creator: Chen, Shoei-Sheng; Zhu, S. & Jendrzejczyk, J. A.
Partner: UNT Libraries Government Documents Department
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Experiment on Fluidelastic Instability of Loosely Supported Tube Arrays in Crossflow

Description: A tube array supported by baffle plates in crossflow may be subjected to fluid-elastic instability in the tube-support-plate-inactive mode. An experimental study is presented to characterize the tube motion. Three series of tests were performed to measure tube displacements as a function of flow velocity for different clearances. The motion was examined by root-mean-square values of tube displacements, power spectral densities, phase planes, Poincare maps, and Lyapunov exponents. The experiment… more
Date: June 1993
Creator: Chen, Shoei-Sheng; Zhu, S. & Cai, Y.
Partner: UNT Libraries Government Documents Department
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CANCELLED Molecular dynamics simulations of noble gases in liquidwater: Solvati on structure, self-diffusion, and kinetic isotopeeffect

Description: Despite their great importance in low-temperaturegeochemistry, self-diffusion coefficients of noble gas isotopes in liquidwater (D) have been measured only for the major isotopes of helium, neon,krypton and xenon. Data on the self-diffusion coefficients of minor noblegas isotopes are essentially non-existent and so typically are estimatedby a kinetic theory model in which D varies as the inverse square root ofthe isotopic mass (m): D proportional to m-0.5. To examine the validityof the kinetic … more
Date: May 25, 2007
Creator: Bourg, I.C. & Sposito, G.
Partner: UNT Libraries Government Documents Department
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Final Technical Report

Description: This research consisted of a theoretical investigation of the properties of surface-based nanostructures, having as a main goal the deeper understanding of the atomic-scale mechanisms responsible for the formation and stability of such structures. This understanding will lead to the design of improved systems for applications in diverse areas such as novel electronic devices, sensors, field-effect transistors, substrates with enhanced hydro-phobic (water repelling) or hydro-philic (water absorb… more
Date: February 2, 2009
Creator: Kaxiras, Efthimios
Partner: UNT Libraries Government Documents Department
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Report of a Workshop on Parallelization of Coupled Cluster Methods

Description: The benchmark, ab initio quantum mechanical methods for molecular structure and spectra are now recognized to be coupled-cluster theory. To benefit from the transiiton to tera- and petascale computers, such coupled-cluster methods must be created to run in a scalable fashion. This Workshop, held as a aprt of the 48th annual Sanibel meeting, at St. Simns, Island, GA, addressed that issue. Representatives of all the principal scientific groups who are addressing this topic were in attendance, to … more
Date: May 8, 2008
Creator: Bartlett, Rodney J. & Deumens, Erik
Partner: UNT Libraries Government Documents Department
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Ionic liquids for rechargeable lithium batteries

Description: We have investigated possible anticipated advantages of ionic-liquid electrolytes for use in lithium-ion batteries. Thermal stabilities and phase behavior were studied by thermal gravimetric analysis and differential scanning calorimetry. The ionic liquids studied include various imidazoliumTFSI systems, pyrrolidiniumTFSI, BMIMPF{sub 6}, BMIMBF{sub 4}, and BMIMTf. Thermal stabilities were measured for neat ionic liquids and for BMIMBF{sub 4}-LiBF{sub 4}, BMIMTf-LiTf, BMIMTFSI-LiTFSI mixtures. C… more
Date: September 29, 2005
Creator: Salminen, Justin; Papaiconomou, Nicolas; Kerr, John; Prausnitz,John & Newman, John
Partner: UNT Libraries Government Documents Department
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Acoustic Emission Precursors of M6.0 2004 Parkfield and M7.0 1989Loma Prieta Earthquakes

Description: Two recent strike-slip earthquakes on the San Andreas Fault(SAF) in California, the M6.0 2004 Parkfield and M7.0 1989 Loma Prietaevents, revealed peaks in the acoustic emission (AE) activity in thesurrounding crust several months prior to the main events. Earthquakesdirectly within the SAF zone were intentionally excluded from theanalysis. The observed increase in AE is assumed to be a signature of theincreasing stress level in the surrounding crust, while the peak andsubsequent decrease in AE … more
Date: February 1, 2005
Creator: Korneev, Valeri
Partner: UNT Libraries Government Documents Department
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MONTANA PALLADIUM RESEARCH INITIATIVE

Description: Project Objective: The overarching objective of the Montana Palladium Research Initiative is to perform scientific research on the properties and uses of palladium in the context of the U.S. Department of Energy'™s Hydrogen, Fuel Cells and Infrastructure Technologies Program. The purpose of the research will be to explore possible palladium as an alternative to platinum in hydrogen-economy applications. To achieve this objective, the Initiatives activities will fo… more
Date: May 9, 2012
Creator: McCloskey, John; Douglas, Jay; Young, Trevor; Snyder, Mark; Gurney, Stuart & Peters, Brian
Partner: UNT Libraries Government Documents Department
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Research Frontiers in Bioinspired Energy: Molecular-Level Learning from Natural Systems: A Workshop

Description: An interactive, multidisciplinary, public workshop, organized by a group of experts in biochemistry, biophysics, chemical and biomolecular engineering, chemistry, microbial metabolism, and protein structure and function, was held on January 6-7, 2011 in Washington, DC. Fundamental insights into the biological energy capture, storage, and transformation processes provided by speakers was featured in this workshop�which included topics such as microbes living in extreme environments such as hydro… more
Date: March 28, 2012
Creator: Zolandz, Dorothy
Partner: UNT Libraries Government Documents Department
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Final Report for Regulation of Embryonic Development in Higher Plants

Description: The overall goal of the project was to define the cellular processes that underlie embryo development in plants at a mechanistic level. Our studies focused on a critical transcriptional regulator, Arabidopsis LEAFY COTYLEDON (LEC1), that is necessary and sufficient to induce processes required for embryo development. Because LEC1 regulates lipid accumulation during the maturation phase of embryo development, information about LEC1 may be useful in designing approaches to enhance biofuel product… more
Date: October 22, 2013
Creator: Harada, John J.
Partner: UNT Libraries Government Documents Department
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designer phase transitions in lithium-based spinels

Description: When electrons in a metal become correlated with each other, new cooperative behavior can arise. This correlation is magnified when the metal has magnetic ions embedded in it. These atomic magnets try to line up with each other, but in doing so actually create a correlation between the motions of conduction electrons. In turn, these correlated electron motions prevent the magnetic ions from aligning, even at zero Kelvin. When this competition is strongest (at the so-called quantum critical poin… more
Date: September 12, 2011
Creator: Montfrooij, Wouter
Partner: UNT Libraries Government Documents Department
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Using Plasmon Peaks in Electron Energy-Loss Spectroscopy to Determine the Physical and Mechanical Properties of Nanoscale Materials

Description: In this program, we developed new theoretical and experimental insights into understanding the relationships among fundamental universality and scaling phenomena, the solid-state physical and mechanical properties of materials, and the volume plasmon energy as measured by electron energy-loss spectroscopy (EELS). Particular achievements in these areas are summarized as follows: (i) Using a previously proposed physical model based on the universal binding-energy relation (UBER), we established c… more
Date: May 9, 2013
Creator: Howe, James M.
Partner: UNT Libraries Government Documents Department
open access

Final Report

Description: This project combines outcrop-scale heterogeneity characterization, laboratory experiments, and numerical simulations. The study is designed to test whether established dispersion theory accurately predicts the behavior of solute transport through heterogeneous media and to investigate the relationship between heterogeneity and the parameters that populate these models. The dispersion theory tested by this work is based upon the fractional advection-dispersion equation (fADE) model. Unlike most… more
Date: September 24, 2012
Creator: Benson, David A.
Partner: UNT Libraries Government Documents Department
open access

Effect of SOFC Interconnect-Coating Interactions on Coating Properties and Performance

Description: The high operating temperature of solid oxide fuel cells (SOFCs) provides good fuel flexibility which expands potential applications, but also creates materials challenges. One such challenge is the interconnect material, which was the focus of this project. In particular, the objective of the project was to understand the interaction between the interconnect alloy and ceramic coatings which are needed to minimize chromium volatilization and the associated chromium poisoning of the SOFC cathode… more
Date: September 5, 2012
Creator: Fergus, Jeffrey W.
Partner: UNT Libraries Government Documents Department
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Symposium on Plant Protein Phosphorylation

Description: Protein phosphorylation and dephosphorylation play key roles in many aspects of plant biology, including control of cell division, pathways of carbon and nitrogen metabolism, pattern formation, hormonal responses, and abiotic and biotic responses to environmental signals. A Symposium on Plant Protein Phosphorylation was hosted on the Columbia campus of the University of Missouri from May 26-28, 2010. The symposium provided an interdisciplinary venue at which scholars studying protein modificati… more
Date: November 1, 2011
Creator: Walker, John C.
Partner: UNT Libraries Government Documents Department
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Progress Report 2011: Understanding compound phase transitions in Heusler alloy giant magnetocaloric materials

Description: Our goal is to gain insight into the fundamental physics that is responsible for magnetocaloric effects (MCE) and related properties at the atomic level. We are currently conducting a systematic study on the effects of atomic substitutions in Ni2MnGa-based alloys, and also exploring related full- and half-Heusler alloys, for example Ni-Mn-X (X=In, Sn, Sb), that exhibit a wide variety of interesting and potentially useful physical phenomena. It is already known that the magnetocaloric effect in … more
Date: December 13, 2011
Creator: Stadler, Shane
Partner: UNT Libraries Government Documents Department
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Mesoscale Interfacial Dynamics in Magnetoelectric Nanocomposites

Description: Theory and modeling of chessboard-like self-assembling of vertically aligned columnar nanostructures in films has been developed. By means of modeling and three-dimensional computational simulations, we proposed a novel self-assembly process that can produce good chessboard nanostructure architectures through a pseudo-spinodal decomposition of an epitaxial film under optimal thermodynamic and crystallographic conditions (appropriate choice of the temperature, composition of the film, and crysta… more
Date: August 6, 2009
Creator: Khachaturyan, Armen G.
Partner: UNT Libraries Government Documents Department
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Stuff- The Materials that Shape our World - Experimental Learning Opportunities

Description: Making Stuff is a four-part series that explores how materials changed history and are shaping the future. To further enhance public engagement in and understanding of materials science, the project convened an extensive network of community coalitions across the country that hosted Making Stuff outreach activities and events, science cafes, and educator workshops in their local areas. Department Of Energy funding enabled us to increase the number of communities formally involved in the project… more
Date: April 30, 2012
Creator: Rosenstein, Pam
Partner: UNT Libraries Government Documents Department
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DEVELOPMENT OF NEW MID-INFRARED ULTRAFAST LASER SOURCES FOR COMPACT COHERENT X-RAY SOURCES

Description: In this project, we proposed to develop laser based mid-infrared lasers as a potentially robust and reliable source of ultrafast pulses in the mid-infrared region of the spectrum, and to apply this light source to generating bright, coherent, femtosecond-to-attosecond x-ray beams.
Date: May 14, 2012
Creator: Backus, Sterling
Partner: UNT Libraries Government Documents Department
open access

Understanding Size Effect in Cleavage Cracking in Thin Materials

Description: In a specially designed tensile fracture experiment on bicrysal thin films, it was discovered that the fracture toughness of a thin film is not a material constant; rather, as the film becomes thinner it decreases much faster than the prediction of conventional theory. A detailed analysis revealed that this is caused by the mismatch of crystalline structures and, more importantly, with an appropriate crystalline orientation distribution the decrease may be suppressed. This result shed light on … more
Date: February 22, 2013
Creator: Qiao, Yu
Partner: UNT Libraries Government Documents Department
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