WorldCat Identities

United States Department of Energy Oakland Operations Office

Works: 3,783 works in 4,023 publications in 1 language and 15,177 library holdings
Genres: Conference papers and proceedings 
Roles: Researcher, Sponsor
Publication Timeline
Most widely held works by United States
Final Report on Grant DE-FG03-02ER63470( )

2 editions published between 2006 and 2011 in English and held by 0 WorldCat member libraries worldwide

The goal of this project is to provide critical information to characterize the qualitative and quantitative similarities and difference in repair characteristics between clustered damage sites formed by ionizing radiation and singly damaged sites produced by endogenous processes. The premise is that base pairing and base stacking interactions are qualitatively and quantitatively different for singly and multiply damaged DNA sites. State-of-the-art computational chemistry model were used to characterize the structure, energetics, and spectroscopy of singly and multiply damaged (clustered) DNA sites
Hawaii Energy Strategy : Program guide( )

3 editions published between 1992 and 1993 in English and held by 0 WorldCat member libraries worldwide

The Hawaii Energy Strategy program, or HES, is a set of seven projects which will produce an integrated energy strategy for the State of Hawaii. It will include a comprehensive energy vulnerability assessment with recommended courses of action to decrease Hawaii's energy vulnerability and to better prepare for an effective response to any energy emergency or supply disruption. The seven projects are designed to increase understanding of Hawaii's energy situation and to produce recommendations to achieve the State energy objectives of: Dependable, efficient, and economical state-wide energy systems capable of supporting the needs of the people, and increased energy self-sufficiency. The seven projects under the Hawaii Energy Strategy program include: Project 1: Develop Analytical Energy Forecasting Model for the State of Hawaii. Project 2: Fossil Energy Review and Analysis. Project 3: Renewable Energy Resource Assessment and Development Program. Project 4: Demand-Side Management Program. Project 5: Transportation Energy Strategy. Project 6: Energy Vulnerability Assessment Report and Contingency Planning. Project 7: Energy Strategy Integration and Evaluation System
Culturally relevant science : an approach to math science education for Hispanics( )

3 editions published in 1996 in English and held by 0 WorldCat member libraries worldwide

As planned a letter was sent out to 17 teachers who had participated in a Summer 1994 workshop on ''Culturally Relevant Science for Hispanics'' at Michigan State. These teachers were supposed to have spent the intervening time developing lesson plans and curricula. The letter requested a report of any activities undertaken and copies of lesson plans and materials developed by February 1996 with a stipend of $400 for satisfactory reports. It was a disappointment to only get 9 responses and not all of them demonstrating a satisfactory level of activity. Diana Marinez, Dean of Science at Texas A and M University, Corpus Christi, who is the other developer of this curriculum and the author reviewed the submitted materials and chose those showing the most promise to be invited to participate in the Summer Writing Workshop. Spring of 1996 and particularly in May--June, the author wrote a partial first draft of a companion volume for the teacher's manual which would provide a rationale for doing culturally relevant science, present the cultural and the scientific background that teachers would need in order to be able to teach. One of the goals of this curriculum is that it should be off-the-shelf ready to teach and that teachers would not have to do extra research to encourage its adoption. The outline of the book is appendix 1. The Writing Workshop was held at Texas A and M University, Corpus Christi from July 14 to July 27, 1996. Participating teachers chose topics that they were interested in developing and wrote first drafts. These were distributed to all participants and critiqued by the workshop directors before being rewritten. Some teachers were more productive than others depending on their science background. In total an impressive number of lesson plans were written. These lesson plans are listed in Appendix 3. Appendix 4 is a sample lesson. Work still needs to be done on both the source book and the teachers' manual
Final Report : Combinatorial Methods for Gene Recognition, March 1, 1997 - August 31, 1999( )

16 editions published between 1989 and 2002 in English and held by 0 WorldCat member libraries worldwide

We discuss the exploration of the newly proposed blowout regime of the plasma wakefield accelerator and advanced photoinjector technology for linear collider applications. The plasma wakefield experiment at ANL produced several ground-breaking results in the physics of the blowout regime. The photoinjector R and D effort produced breakthroughs in theoretical, computational, and experimental methods in high brightness beam physics. Results have been published
PISCES Program : Plasma-materials interactions and edge-plasma physics research. Progress report, 1991--1992( )

3 editions published between 1990 and 1992 in English and held by 0 WorldCat member libraries worldwide

This report discusses the following topics: PISCES-A facility; PISCES-B facility; PISCES-C facility; fast scanning probes; spectroscopic diagnostics; PISCES laboratory data acquisition system; SEM EDX facilities; vacuum outgassing facility; evaluation of bulk-boronized graphites; chemical sputtering of C-C composites; D-retention in redeposited carbon; TEXTOR-exposed graphite; oxygen plasma reactions with graphite; gaseous divertor simulation; experimental; proof of RF-limiter; H-mode transition by DC-biasing; edge-plasma physics experiments in the CCT-tokamak; and He-spectroscopy for edge-plasma diagnosis
Isotope tracer studies of diffusion in silicates and of geological transport processes using actinide elements. Progress report( )

3 editions published between 1991 and 1992 in English and held by 0 WorldCat member libraries worldwide

The following are reported: high abundance sensitivity mass spectrometer for U-Th studies; ²³⁸U-²³°Th disequilibrium in recent lavas from Iceland; water-rock interaction from U-Th studies; resonance ionization mass spectrometry of Os and Ti isotopes; and self-diffusion of Mg
Final report on the Copper Mountain conference on multigrid methods( )

3 editions published between 1997 and 2004 in English and held by 0 WorldCat member libraries worldwide

OAK-B135 Final report from the University of California San Diego for an ongoing research project that was moved to Brookhaven National Laboratory where proposed work will be completed. The research uses measurements made by the Atmospheric Radiation Measurement (ARM) Program to quantify the effects of aerosols and clouds on the Earth's energy balance in the climatically important Tropical Western Pacific
The perpendicular electron energy flux driven by magnetic fluctuations in the edge of TEXT-U( )

3 editions published between 1994 and 1995 in English and held by 0 WorldCat member libraries worldwide

A fast bolometer was used for direct measurements of parallel electron energy flux in the edge of TEXT-U. The fluctuating component of the parallel electron energy flux, combined with a measurement of magnetic fluctuations, provides an upper limit to the perpendicular electron flux. This magnetically driven energy flux cannot account for the observed energy flux
Avoiding degenerate coframes in an affine gauge approach to quantum gravity( )

3 editions published between 1993 and 1996 in English and held by 0 WorldCat member libraries worldwide

Classical dynamics, reformulated in terms of its quantum envelope is studied for the stationary states of the interacting system. The dynamical variable of ''elapsed time'' plays a crucial role in this study. It is shown that the perturbation series for the elapsed time can be summed in various simple cases even when standard perturbation series diverge. For the special class of systems where the interactions fall off sufficiently fast at infinity one could define ''in'' and ''out'' states; and consequently the wave matrices and scattering matrices. The scattering phase shifts bear a simple relation to the time delay in scattering
Progress report by Mo.) Washington University (Saint Louis( )

15 editions published between 1989 and 1994 in English and held by 0 WorldCat member libraries worldwide

Work has focused on several aspects of the fundamental chemistry and physics semiconductor/liquid junction behavior. These projects have been directed primarily towards GaAs/liquid contacts, because GaAs/liquid systems provide high energy conversion efficiencies and offer an opportunity to gain mechanistic understanding of the factors that are important to control in an efficient photoelectrochemical energy conversion system
Lattice gas hydrodynamics : Theory and simulations. Final report, [February 1, 1989--March 31, 1991]( )

4 editions published in 1993 in English and held by 0 WorldCat member libraries worldwide

The first successful application of a microscopic analogy to create a skeleton cellular automaton and analyze it with statistical mechanical tools, was the work of Frisch, Hasslacher and Pomeau on the Navier-Stokes equation in two and three dimensions. This has become a very large research area with lattice gas models and methods being used for both fundamental investigations into the foundations of statistical mechanics and a large number of diverse applications. This present research was devoted to enlarging the fundamental scope of lattice gas models and proved successful. Since the beginning of this proposal, cellular automata have been constructed for statistical mechanical models, fluids, diffusion and shock systems in fundamental investigations. In applied areas, there are now excellent lattice gas models for complex flows through porous media, chemical reaction and combustion dynamics, multiphase flow systems, and fluid mixtures with natural boundaries. With extended cellular fluid models, one can do problems with arbitrary pairwise potentials. Recently, these have been applied to such problems as non-newtonian or polymeric liquids and a mixture of immiscible fluids passing through fractal or spongelike media in two and three dimensions. This proposal has contributed to and enlarged the scope of this work
Final Report : BaBar Detector and Experimental at SLAC, September 30, 1998 - September 29, 1999( )

18 editions published between 1997 and 2004 in English and held by 0 WorldCat member libraries worldwide

Final report of Phase I SBIR grant. A study of processing methods for barium titanate/polymer nanocomposites for use in dielectric applications
Resonance enhanced multiphoton ionization spectra of molecules and molecular fragments. Technical report, January 1990--December 1990( )

3 editions published between 1988 and 1997 in English and held by 0 WorldCat member libraries worldwide

The objective of the research under this contract is to carry out studies of resonant enhanced multiphoton ionization (REMPI) processes in molecules. In the (n+1)-REMPI process of interest an atom or molecule in a specific initial state absorbs n photons making a transition to an intermediate state from which it is subsequently ionized by absorption of an additional photon. The studies are designed to provide a quantitatively robust analysis and prediction of key spectral features in several ongoing experimental studies and potentially practical applications of this technique. The specific problems of interest to the authors in these studied are (1) the vibrational distributions of ions that can be expected in REMPI of small molecules and molecular fragments with particular emphasis on their non-Franck-Condon behavior. Such non-Franck-Condon behavior introduces serious complications in the use of the technique for state-specific production of ions, e.g., O₂([nu]) and OH([nu]), and in the extraction of state populations from REMPI signals, (2) rotational distributions of ions that can be produced in various REMPI schemes and how these distributions can be tuned by choice of the resonant state and influenced by the molecular character of the photoelectron, and (3) the circular dichroism in photoelectron angular distributions, i.e., the difference in photoelectron angular distributions produced by right- and left-circularly polarized, and their use as a probe of molecular alignment. Here the author will summarize the progress that has been made to date in the studies of these features and applications of REMPI of molecules and molecular fragments. A significant feature of these studies, which will be explicitly assumed throughout the discussion below, is that they are carried out using quantitatively reliable molecular photoelectron orbitals
Particle pressures in fluidized beds( )

3 editions published between 1992 and 1993 in English and held by 0 WorldCat member libraries worldwide

Campbell and Wang (1991) showed that the particle pressures in gas-fluidized beds were largely generated by the passage of bubbles. In particular, they showed that the average particle pressure exerted on the side walls scaled with the average size of the bubble. This immediately brings to mind two questions: (1) what is it about bubbles that leads to particle pressure generation and (2) would there be measurable particle pressures in liquid-fluidized beds which, while unstable, do not bubble? This project is largely aimed at answering these two questions. To attack the first problem, the authors have built a two-dimensional gas-fluidized bed into which bubbles may be injected and the distribution of particle-pressure measured. For the latter, other experiments are being performed in liquid fluidized beds. However, it soon became apparent that the particle pressures generated in the liquid beds are extremely small. This has pointed that phase of the research in two directions. The first is the design and construction of a third, and more sensitive, from of the particle pressure transducer. The second approach arose from reflection on what ultimately was the utility of the current research. This led to the development of a generic stability model, in which all modeled terms are left unspecified. From analyzing this model, they have developed an experimental plan that, by measuring the characteristics of voidage disturbances and comparing with the theory, will allow them to back out appropriate values for the modeled terms. The results will not only yield insight into the particle pressure, but also of the fluid drag. The latter results may be used to evaluate common models for these terms
[Magnetic thin film research] : Progress report year 2( )

1 edition published in 1996 in English and held by 0 WorldCat member libraries worldwide

The work in the past year has primarily involved four areas of magnetic thin films: amorphous rare earth-transition metal alloys, epitaxial CoPt₃ and Ni-Pt alloy thin films, amorphous rare earth doped Si (a new class of dilute magnetic semiconductor with large negative magnetoresistance which the authors have discovered), and exchange-coupled antiferromagnetic insulators. In the amorphous alloys, they made a systematic study of the effects of local anisotropy, macroscopic (up tack) anisotropy, and exchange constant on the fundamental (and practical) properties of these magnetic alloys, as originally described in the grant proposal. The work on the epitaxial Co-Pt (and more recently Ni-Pt) alloys was originally undertaken as a comparison study to the amorphous alloys. Crystalline Co-Pt alloys have many striking similarities to the amorphous rare earth-transition metal alloys: perpendicular magnetic anisotropy, magneto-optic activity, and a {Tc} (for CoPt₃) somewhat above room temperature. They have discovered that these alloys exhibit a remarkable new phenomena; a surface-induced miscibility gap in a material which is believed to be completely miscible in the bulk. The authors are currently in several collaborations to measure specific heat of magnetic thin films. They used the specific heat to study antiferromagnetic superlattices, specifically NiO, CoO and MgO in various combinations to allow separation of effects of finite layer thickness and exchange coupling on the magnetic ordering
Research in chemical kinetics. Progress report, January 1, 1991--December 31, 1991( )

3 editions published between 1990 and 1991 in English and held by 0 WorldCat member libraries worldwide

This report contains sections on the reaction of chlorine atoms with 1,1,1,2-terafluoroethane, abstraction reactions by thermal chlorine atoms with hfc-134a, and chlorine atom reactions with vinyl bromide
Combustion-related studies using weakly-bonded complexes( )

3 editions published between 1992 and 1993 in English and held by 0 WorldCat member libraries worldwide

This work is concerned with microscopic-level phenomena of importance in combustion. Weakly bonded adducts formed in supersonic expansions are investigated spectroscopically and used to limit the angles and impact parameters of biomolecular encounters. Also examined are species in which a free radical such as oxygen is bonded to a stable molecule in a shallow well outside the reaction barrier. These species can be used for several studies such as those involving photoinitiated reactions. The main experimental approach uses tunable diode laser absorption spectroscopy to monitor and characterize in detail the complexes of interest, and laser photoinitiation and LIF/MPI detection to examine biomolecular processes in which the adducts are used as precursors. In the first phase of this research, geometries and other molecular properties are being determined from vibrational-rotational spectra. In the second phase, these complexes will be used as precursors to study photoinitiated reactions in precursor geometry limited environments
Nuclear research with the electromagnetic probe. Progress report( )

4 editions published between 1988 and 1994 in English and held by 0 WorldCat member libraries worldwide

The project discussed in this progress report focusses on understanding the many facets and scales of strongly interacting systems using the electromagnetic probe. On one hand we are investigating the spin properties of the nucleon (proton and neutron) through its fundamental constituents (quarks and gluons). On the other hand we are studying the properties of nucleons in nuclei and the few-body systems. The E142 and the newly approved E143 experiments planned at the Stanford Linear Accelerator Center are designed to provide an answer to the mystery of the missing spin of the proton, while the new letter of intent submitted to SLAC, will investigate the so called Color transparency effect related to the prediction of PQCD for the (e, e(prime)p) quasielastic process in nuclei. Our research involvement at the Continuous Electron Beam Accelerator Facility focusses in Hall A. From the technical point of view we are building the Coemption polarimeter for the Hall A beam line. This device should allow a precise measurement of the electron beam polarization for several approved experiments. From the physics aspect of the project we plan to perform the transverse/longitudinal separation of the nuclear response at high momentum transfer in the quasielastic region, the photodisintegration of deuterium with the measurement of the recoil polarization of the proton and the electromagnetic form factor of few body systems experiment
Final report by Yale University( )

12 editions published between 1995 and 2007 in English and held by 0 WorldCat member libraries worldwide

This grant was a continuation of research conducted at the University of Florida under Grant No. DE-FG05-91ER45462 in which we investigated the energy bandgap shifts produced in semiconductor quantum dots of sizes between 1.5 and 40 nm. The investigated semiconductors consisted of a series of Column 2-6 compounds (CdS, CdSe, CdTe) and pure Column IV elements (Si and Ge). It is well-known of course that the 2-6 semiconductors possess a direct-gap electronic structure, while the Column IV elements possess an indirect-gap structure. The investigation showed a major difference in quantum confinement behavior between the two sets of semiconductors. This difference is essentially associated with the change in bandgap energy resulting from size confinement. In the direct-gap semiconductors, the change in energy (blue shift) saturates when the crystals approach 2-3 nm in diameter. This limits the observed shift in energy to less than 1 eV above the bulk value. In the indirect-gap semiconductors, the energy shift does not show any sign of saturation and in fact, we produced Si and Ge nanocrystals with absorption edges in the UV. The reason for this difference has not been determined and will require additional experimental and theoretical studies. In our work, we suggest, but do not prove that mixing of conduction band side valleys with the central valley under conditions of size confinement may be responsible for the saturation in the blue-shift of direct-gap semiconductors. The discovery of large bandgap energy shifts with crystal size prompted us to suggest that these materials may be used to form photovoltaic cells with multi-gap layers for high efficiency in a U.S. Patent issued in 1998. However, this possibility depends strongly on the ability to collect photoexcited carriers from energy-confined crystals. The research conducted at the University of Arizona under the subject grant had a major goal of testing an indirect gap semiconductor in size-confined structures to determine if photocarriers could be collected. Thus, we tested a variety of semiconductor-glass nano-composite structures for photoconductivity. Tests were conducted in collaboration with the Laser Physics Division at Sandia National Laboratories. Nano-composite samples were formed consisting of Ge nanocrystals embedded in an indium-tin-oxide matrix. Photoconductivity measurements were conducted with exposure of the films to sub-bandgap and super-bandgap light. The results showed a clear photoconductivity effect arising from exposure to super-bandgap light only. These results suggest that the high-efficiency photovoltaic cell structure proposed in DOE sponsored U.S. Patent 5,720,827 is viable. The results of fabrication studies, structural characterization studies and photovoltaic measurements are presented in the report. This report is taken from a PhD dissertation of Tracie J. Bukowski submitted to the University of Florida in May 2002. ''The optical and photoconductive response in germanium quantum dots and indium tin oxide composite thin film structures, '' Dr. Bukowski conducted her PhD study under this grant at the University of Arizona and under Grant No DE-FG05-91ER45462 at the University of Florida, as well as during a two-year fellowship at Sandia National Laboratories
Physical characterization of magmatic liquids. [Ultrasonic and Brillouin Scattering Studies of Natural and Synthetic Silicates and Oxides]( )

3 editions published between 1991 and 1992 in English and held by 0 WorldCat member libraries worldwide

Long-range goals of this research project are: (1) Characterization of seismic velocity and attenuation (V{sub p}, V{sub S}, Q{sub p}⁻¹, Q{sup S}⁻¹) and electrical properties of selected Hawaiian and related rocks under appropriate controlled environments of pressure, temperature and volatile/fluid content; and, (2) Characterization of the elastic, viscoelastic and thermodynamic properties (V{sub p}, V{sub S}, Q{sub P}⁻¹, Q{sub S}⁻¹, viscosity and compressibility) of molten basalts, picrites and komatites, and related silicate melts to (approximately) 1600°C using the ultrasonic interferometry method. In addition, the pressure dependences of V{sub p}, V{sub S} and bulk modulus will be determined using the Brillouin scattering and diamond- anvil cell techniques
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Audience level: 0.58 (from 0.31 for [Magnetic ... to 0.81 for Final repo ...)

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