National Library of Energy BETA

Sample records for abstract latitude tilt

  1. Abstract:

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Abstract: We present a unique approach to the design and synthesis of "giant molecules" ... Herein, "nano-atoms" refer to shape-persistent molecular nanoparticles (MNPs) with ...

  2. File:NREL-afg-10km-tilt.pdf | Open Energy Information

    Open Energy Info (EERE)

    tilt.pdf Jump to: navigation, search File File history File usage Afghanistan - Annual Flat Plate Tilted at Latitude Size of this preview: 776 600 pixels. Full resolution...

  3. File:NREL-africa-tilt.pdf | Open Energy Information

    Open Energy Info (EERE)

    tilt.pdf Jump to: navigation, search File File history File usage Africa - Annual Flat Plate Tilted at Latitude (PDF) Size of this preview: 776 600 pixels. Full resolution...

  4. Tilted fuel cell apparatus

    DOE Patents [OSTI]

    Cooper, John F.; Cherepy, Nerine; Krueger, Roger L.

    2005-04-12

    Bipolar, tilted embodiments of high temperature, molten electrolyte electrochemical cells capable of directly converting carbon fuel to electrical energy are disclosed herein. The bipolar, tilted configurations minimize the electrical resistance between one cell and others connected in electrical series. The tilted configuration also allows continuous refueling of carbon fuel.

  5. File:NREL-bhutan-10kmsolar-tilt.pdf | Open Energy Information

    Open Energy Info (EERE)

    File File history File usage Bhutan - Annual - Flat PlateTilted at Latitude Solar Radiation Size of this preview: 776 600 pixels. Full resolution (1,650 1,275 pixels,...

  6. Abstract Submission

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Abstract Template Please use this abstract template (docx) Abstract Submission Do not submit classified information to the form. First Name* Middle Name (optional) Last Name* ...

  7. Error abstractions

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Error and fault abstractions Mattan Erez UT Austin *Who should care about faults and errors? *Ideally, only system cares about masked faults? - Assuming application bugs are not...

  8. Abstract2007

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    19, 2007 for poster submission only). Abstract should be text only and written in good English. No figures, images, equations and special characters are allowed. The limit on the...

  9. RE-EXAMINING SUNSPOT TILT ANGLE TO INCLUDE ANTI-HALE STATISTICS

    SciTech Connect (OSTI)

    McClintock, B. H.; Norton, A. A.; Li, J. E-mail: aanorton@stanford.edu

    2014-12-20

    Sunspot groups and bipolar magnetic regions (BMRs) serve as an observational diagnostic of the solar cycle. We use Debrecen Photohelographic Data (DPD) from 1974-2014 that determined sunspot tilt angles from daily white light observations, and data provided by Li and Ulrich that determined sunspot magnetic tilt angle using Mount Wilson magnetograms from 1974-2012. The magnetograms allowed for BMR tilt angles that were anti-Hale in configuration, so tilt values ranged from 0 to 360° rather than the more common ±90°. We explore the visual representation of magnetic tilt angles on a traditional butterfly diagram by plotting the mean area-weighted latitude of umbral activity in each bipolar sunspot group, including tilt information. The large scatter of tilt angles over the course of a single cycle and hemisphere prevents Joy's law from being visually identified in the tilt-butterfly diagram without further binning. The average latitude of anti-Hale regions does not differ from the average latitude of all regions in both hemispheres. The distribution of anti-Hale sunspot tilt angles are broadly distributed between 0 and 360° with a weak preference for east-west alignment 180° from their expected Joy's law angle. The anti-Hale sunspots display a log-normal size distribution similar to that of all sunspots, indicating no preferred size for anti-Hale sunspots. We report that 8.4% ± 0.8% of all bipolar sunspot regions are misclassified as Hale in traditional catalogs. This percentage is slightly higher for groups within 5° of the equator due to the misalignment of the magnetic and heliographic equators.

  10. PROGRAM ABSTRACTS

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    & DEVELOPMENT: PROGRAM ABSTRACTS Energy Efficiency and Renewable Energy Office of Transportation Technologies Office of Advanced Automotive Technologies Catalyst Layer Bipolar Plate Electrode Backing Layers INTEGRATED SYSTEMS Polymer Electrolyte Membrane Fuel Cells Fuel Cell Stack PEM STACK & STACK COMPONENTS Fuel Cell Stack System Air Management System Fuel Processor System For Transportation June 1999 ENERGY EFFICIENCY AND RENEWABLE ENERGY OFFICE OF TRANSPORTATION TECHNOLOGIES OFFICE

  11. Network Abstractions:

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Abstractions: The first step towards a programmable WAN Inder Monga TIP 2013 January 15 th , 2013 Lawrence Berkeley National Laboratory U.S. Department of Energy | Office of Science Ongoing Science Revolution Data-intensive Science * Era of Big-Data' Exascale, HPC and Future Data Centers * Optics to the end 12/18/12 2 Inder Monga, OTS Demo Lawrence Berkeley National Laboratory U.S. Department of Energy | Office of Science Data Integration Bringing together big-data' from various sources Dataset

  12. Large optics inspection, tilting, and washing stand

    DOE Patents [OSTI]

    Ayers, Marion Jay; Ayers, Shannon Lee

    2010-08-24

    A large optics stand provides a risk free means of safely tilting large optics with ease and a method of safely tilting large optics with ease. The optics are supported in the horizontal position by pads. In the vertical plane the optics are supported by saddles that evenly distribute the optics weight over a large area.

  13. Large optics inspection, tilting, and washing stand

    DOE Patents [OSTI]

    Ayers, Marion Jay; Ayers, Shannon Lee

    2012-10-09

    A large optics stand provides a risk free means of safely tilting large optics with ease and a method of safely tilting large optics with ease. The optics are supported in the horizontal position by pads. In the vertical plane the optics are supported by saddles that evenly distribute the optics weight over a large area.

  14. SSRL30 Abstracts

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    abstracts highlighting research activities conducted over the past year at SSRL for oral and poster presentations at the Users' Meeting. Please use the abstract submission form...

  15. An Acoustic Wave Equation for Tilted Transversely Isotropic Media...

    Office of Scientific and Technical Information (OSTI)

    An Acoustic Wave Equation for Tilted Transversely Isotropic Media Citation Details In-Document Search Title: An Acoustic Wave Equation for Tilted Transversely Isotropic Media ...

  16. Spin transport in tilted electron vortex beams

    SciTech Connect (OSTI)

    Basu, Banasri; Chowdhury, Debashree

    2014-12-10

    In this paper we have enlightened the spin related issues of tilted Electron vortex beams. We have shown that in the skyrmionic model of electron we can have the spin Hall current considering the tilted type of electron vortex beam. We have considered the monopole charge of the tilted vortex as time dependent and through the time variation of the monopole charge we can explain the spin Hall effect of electron vortex beams. Besides, with an external magnetic field we can have a spin filter configuration.

  17. Octahedral tilt transitions in the relaxor ferroelectric Na{sub 1/2}Bi{sub 1/2}TiO{sub 3}

    SciTech Connect (OSTI)

    Meyer, Kai-Christian Gröting, Melanie; Albe, Karsten

    2015-07-15

    The kinetics of octahedral tilt transitions in the lead-free relaxor material sodium bismuth titanate Na{sub 1/2}Bi{sub 1/2}TiO{sub 3} (NBT) is investigated by electronic structure calculations within density functional theory. Energy barriers for transitions between tetragonal, rhombohedral and orthorhombic tilts in cation configurations with [001]- and [111]-order on the A-sites are determined by nudged elastic band calculations. By tilting entire layers of octahedra simultaneously we find that the activation energy is lower for structures with 001-order compared to such with 111-order. The energetic coupling between differently tilted layers is, however, negligibly small. By introducing a single octahedral defect we create local tilt disorder and find that the deformation energy of the neighboring octahedra is less in a rhombohedral than in a tetragonal structure. By successively increasing the size of clusters of orthorhombic defects in a rhombohedral matrix with 001-order, we determine a critical cluster size of about 40 Å . Thus groups of about ten octahedra can be considered as nuclei for polar nanoregions, which are the cause of the experimentally observed relaxor behavior of NBT. - Graphical abstract: Nine orthorhombic oxygen octahedral tilt defects in a rhombohedral tilt configuration. - Highlights: • Chemical order influences energy barriers of octahedral tilt transitions. • The octahedral deformation energy is lower in rhombohedral phases. • Tilt defect clusters are more likely in rhombohedral structures. • Tilt defect clusters can act as nuclei for polar nanoregions.

  18. Tilt assembly for tracking solar collector assembly

    DOE Patents [OSTI]

    Almy, Charles; Peurach, John; Sandler, Reuben

    2012-01-24

    A tilt assembly is used with a solar collector assembly of the type comprising a frame, supporting a solar collector, for movement about a tilt axis by pivoting a drive element between first and second orientations. The tilt assembly comprises a drive element coupler connected to the drive element and a driver, the driver comprising a drive frame, a drive arm and a drive arm driver. The drive arm is mounted to the drive frame for pivotal movement about a drive arm axis. Movement on the drive arm mimics movement of the drive element. Drive element couplers can extend in opposite directions from the outer portion of the drive arm, whereby the assembly can be used between adjacent solar collector assemblies in a row of solar collector assemblies.

  19. Combined Scanning Transmission Electron Microscopy Tilt- and Focal Series

    SciTech Connect (OSTI)

    Dahmen, Tim; Baudoin, Jean-Pierre G; Lupini, Andrew R; Kubel, Christian; Slusallek, Phillip; De Jonge, Niels

    2014-01-01

    In this study, a combined tilt- and focal series is proposed as a new recording scheme for high-angle annular dark-field scanning transmission electron microscopy (STEM) tomography. Three-dimensional (3D) data were acquired by mechanically tilting the specimen, and recording a through-focal series at each tilt direction. The sample was a whole-mount macrophage cell with embedded gold nanoparticles. The tilt focal algebraic reconstruction technique (TF-ART) is introduced as a new algorithm to reconstruct tomograms from such combined tilt- and focal series. The feasibility of TF-ART was demonstrated by 3D reconstruction of the experimental 3D data. The results were compared with a conventional STEM tilt series of a similar sample. The combined tilt- and focal series led to smaller missing wedge artifacts, and a higher axial resolution than obtained for the STEM tilt series, thus improving on one of the main issues of tilt series-based electron tomography.

  20. Abstract Submission Process

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Abstract Submission Process Focusing on methods and computational tools used to help sequence, assemble, and finish genomes, including new sequencing technologies. Contact Shannon...

  1. BEMS: Abstract book

    SciTech Connect (OSTI)

    1995-06-01

    This volume provides abstracts of presentations made at the Sixteenth Meeting of The Bioelectromagnetics Society held June 12-17, 1994 in Copenhagen, Denmark.

  2. SSRL29 Abstract Form

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    abstracts highlighting research activities conducted over the past year at SSRL for oral or poster presentation at the meeting. Posters will be displayed throughout the meeting...

  3. Abstracts of contributed papers

    SciTech Connect (OSTI)

    Not Available

    1994-08-01

    This volume contains 571 abstracts of contributed papers to be presented during the Twelfth US National Congress of Applied Mechanics. Abstracts are arranged in the order in which they fall in the program -- the main sessions are listed chronologically in the Table of Contents. The Author Index is in alphabetical order and lists each paper number (matching the schedule in the Final Program) with its corresponding page number in the book.

  4. Prediction of tilted capillary barrier performance

    SciTech Connect (OSTI)

    Webb, S.W.; McCord, J.T.; Dwyer, S.F.

    1997-04-01

    Capillary barriers, consisting of tilted fine-over-coarse layers under unsaturated conditions, have been suggested as landfill covers to divert water infiltration away from sensitive underground regions, especially for arid and semi-arid regions. The Hydrological Evaluation of Landfill Performance (HELP) computer code is an evaluation tool for landfill covers used by designers and regulators. HELP is a quasi-two-dimensional model that predicts moisture movement into and through the underground soil and waste layers. Processes modeled within HELP include precipitation, runoff, evapotranspiration, unsaturated vertical drainage, saturated lateral drainage, and leakage through liners. Unfortunately, multidimensional unsaturated flow phenomena that are necessary for evaluating tilted capillary barriers are not included in HELP. Differences between the predictions of the HELP and those from a multidimensional unsaturated flow code are presented to assess the two different approaches. Comparisons are presented for the landfill covers including capillary barrier configurations at the Alternative Landfill Cover Demonstration (ALCD) being conducted at Sandia.

  5. Biological & Environmental Research Abstracts Database

    Office of Scientific and Technical Information (OSTI)

    Submit Ober Abstracts All project abstracts should be submitted via email to: Please include the project title and principal investigator's name along with the abstract submission. ...

  6. Stabilizing windings for tilting and shifting modes

    DOE Patents [OSTI]

    Jardin, Stephen C.; Christensen, Uffe R.

    1984-01-01

    This invention relates to passive conducting loops for stabilizing a plasma ring against unstable tilting and/or shifting modes. To this end, for example, plasma ring in a spheromak is stabilized by a set of four figure-8 shaped loops having one pair on one side of the plasma and one pair on the other side with each pair comprising two loops whose axes are transverse to each other.

  7. TILT, WARP, AND SIMULTANEOUS PRECESSIONS IN DISKS

    SciTech Connect (OSTI)

    Montgomery, M. M.

    2012-07-10

    Warps are suspected in disks around massive compact objects. However, the proposed warping source-non-axisymmetric radiation pressure-does not apply to white dwarfs. In this Letter, we report the first smoothed particle hydrodynamic simulations of accretion disks in SU UMa-type systems that naturally tilt, warp, and simultaneously precess in the prograde and retrograde directions using white dwarf V344 Lyrae in the Kepler field as our model. After {approx}79 days in V344 Lyrae, the disk angular momentum L{sub d} becomes misaligned to the orbital angular momentum L{sub o} . As the gas stream remains normal to L{sub o} , hydrodynamics (e.g., the lift force) is a likely source to disk tilt. In addition to tilt, the outer disk annuli cyclically change shape from circular to highly eccentric due to tidal torques by the secondary star. The effect of simultaneous prograde and retrograde precession is a warp of the colder, denser midplane as seen along the disk rim. The simulated rate of apsidal advance to nodal regression per orbit nearly matches the observed ratio in V344 Lyrae.

  8. Thyra Abstract Interface Package

    Energy Science and Technology Software Center (OSTI)

    2005-09-01

    Thrya primarily defines a set of abstract C++ class interfaces needed for the development of abstract numerical atgorithms (ANAs) such as iterative linear solvers, transient solvers all the way up to optimization. At the foundation of these interfaces are abstract C++ classes for vectors, vector spaces, linear operators and multi-vectors. Also included in the Thyra package is C++ code for creating concrete vector, vector space, linear operator, and multi-vector subclasses as well as other utilitiesmore » to aid in the development of ANAs. Currently, very general and efficient concrete subclass implementations exist for serial and SPMD in-core vectors and multi-vectors. Code also currently exists for testing objects and providing composite objects such as product vectors.« less

  9. Seismic Consequence Abstraction

    SciTech Connect (OSTI)

    M. Gross

    2004-10-25

    The primary purpose of this model report is to develop abstractions for the response of engineered barrier system (EBS) components to seismic hazards at a geologic repository at Yucca Mountain, Nevada, and to define the methodology for using these abstractions in a seismic scenario class for the Total System Performance Assessment - License Application (TSPA-LA). A secondary purpose of this model report is to provide information for criticality studies related to seismic hazards. The seismic hazards addressed herein are vibratory ground motion, fault displacement, and rockfall due to ground motion. The EBS components are the drip shield, the waste package, and the fuel cladding. The requirements for development of the abstractions and the associated algorithms for the seismic scenario class are defined in ''Technical Work Plan For: Regulatory Integration Modeling of Drift Degradation, Waste Package and Drip Shield Vibratory Motion and Seismic Consequences'' (BSC 2004 [DIRS 171520]). The development of these abstractions will provide a more complete representation of flow into and transport from the EBS under disruptive events. The results from this development will also address portions of integrated subissue ENG2, Mechanical Disruption of Engineered Barriers, including the acceptance criteria for this subissue defined in Section 2.2.1.3.2.3 of the ''Yucca Mountain Review Plan, Final Report'' (NRC 2003 [DIRS 163274]).

  10. abstract-hope

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Parallelization of the TRANSIMS Microsimulator - design, development, and performance Michael Hope Transportation Research and Analysis Computing Center Argonne National Laboratory List of Authors ================ Michael Hope Transportation Research and Analysis Computing Center Argonne National Laboratory 277 International Drive West Chicago, IL 60185 Abstract ========= The original TRANSIMS Microsimulator was designed as a purely parallel program. As desktop machine performance grew by leaps

  11. abstract-hope2

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    visualizations - TransVis capabilities and usage Michael Hope Transportation Research and Analysis Computing Center Argonne National Laboratory List of Authors ================ Michael Hope Transportation Research and Analysis Computing Center Argonne National Laboratory 277 International Drive West Chicago, IL 60185 Abstract ========= TRANSIMS is an extremely powerful software package in terms of both the breadth and depth of its analysis. However, there has been relatively little development

  12. abstract-moraga

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Simulation of building evacuation exit rates for TRANSIMS Reinaldo Moraga Department of Industrial and Systems Engineering Northern Illinois University 590 Garden Road DeKalb, IL 60115-2854 (815) 753-1442 List of Authors ================ Reinaldo Moraga Department of Industrial and Systems Engineering Northern Illinois University Abstract ========= This presentation deals with the topic of building evacuation modeling for TRANSIMS large scale simulation models in major metropolitan cities. The

  13. abstract-oh

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Application of TRANSIMS for Highway Work Zones: Travel Pattern and Mobility Impacts Jun-Seok Oh List of Authors ================ Jun-Seok Oh Associate Professor Western Michigan University Kalamazoo, MI 49008-5316 Phone: (269) 276-3216 FAX: (269) 276-3211 Email: This email address is being protected from spambots. You need JavaScript enabled to view it. Abstract ========= This project applies TRANSIMS to highway work zones analysis with emphasis on travel pattern changes and work-zone mobility

  14. bolgac_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Induced fission in real-time Professor Aurel Bolgac Department of Physics, University of Washington, Seattle, Washington Abstract: Nuclear fission appears to be one of the most difficult problems in quantum many-body physics and is approaching shortly the venerable age of 80 years and it still defies efforts to arrive at a microscopic description. A quantum theory of superconductivity was developed in contrast in less than 50 years. Major progress in developing an extension of the Density

  15. mosby_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    capture by any means necessary Dr. Shea Mosby Nuclear Astrophysics and Structure, Los Alamos National Laboratory, Los Alamos, NM Abstract: Knowledge of nuclear reactions in general, and neutron capture cross sections in particular, are necessary to understand both heavy element nucleosynthesis and applications in nuclear energy and defense. While many nuclei of interest lie on or near the valley of stability and can be studied directly, many more are beyond the reach of any direct measurement.

  16. penionzhkevich_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Exotic Nuclei and Astrophysics" Professor Yuri Penionzhkevich Flerov, Lab. of Nucl. Reactions. JINR, Dubna, Russian Federation Abstract: This talk is an attempt to present some problems on the evolution of the Universe: the nucleosynthesis and cosmochronology from the standpoint of physics of particles and nuclei, in particular with the use of the latest results, obtained by means of radioactive nuclear beams. The comparison is made between the processes taking place in the Universe and the

  17. schroeder_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fission Chips" - Unusual Flavors (Dynamic nuclear instabilities in fission-like reactions) Professor W. Udo Schroeder Departments of Chemistry and Physics, University of Rochester, Rochester, NY 14627, USA Abstract Fission of cold nuclei is essentially a binary, adiabatic process, with only a mi- nute probability for the emission of associated light charged clusters. In contrast, nuclear systems in fast heavy-ion reactions respond to significant mechanical and thermal stresses by exhibiting

  18. ABSTRACTS FOR PAPERS PUBLISHED

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ABSTRACTS FOR PAPERS PUBLISHED April 1, 2000 - March 31, 2001 Isoscalar Giant Resonances and Nuclear Matter Compressibility D. H. Youngblood Nucl. Phys. A687, 1 (2001) Compression mode giant resonances have been measured in many nuclei from 12 C to 208 Pb with inelastic scattering of 240 MeV ∀ particles at small angles. Isoscalar monopole (GMR) distributions have been extracted for 17 nuclei and isoscalar dipole (ISDGR) distributions extracted for 11 nuclei. The isoscalar E1 strength

  19. EBS Radionuclide Transport Abstraction

    SciTech Connect (OSTI)

    J. Prouty

    2006-07-14

    The purpose of this report is to develop and analyze the engineered barrier system (EBS) radionuclide transport abstraction model, consistent with Level I and Level II model validation, as identified in Technical Work Plan for: Near-Field Environment and Transport: Engineered Barrier System: Radionuclide Transport Abstraction Model Report Integration (BSC 2005 [DIRS 173617]). The EBS radionuclide transport abstraction (or EBS RT Abstraction) is the conceptual model used in the total system performance assessment (TSPA) to determine the rate of radionuclide releases from the EBS to the unsaturated zone (UZ). The EBS RT Abstraction conceptual model consists of two main components: a flow model and a transport model. Both models are developed mathematically from first principles in order to show explicitly what assumptions, simplifications, and approximations are incorporated into the models used in the TSPA. The flow model defines the pathways for water flow in the EBS and specifies how the flow rate is computed in each pathway. Input to this model includes the seepage flux into a drift. The seepage flux is potentially split by the drip shield, with some (or all) of the flux being diverted by the drip shield and some passing through breaches in the drip shield that might result from corrosion or seismic damage. The flux through drip shield breaches is potentially split by the waste package, with some (or all) of the flux being diverted by the waste package and some passing through waste package breaches that might result from corrosion or seismic damage. Neither the drip shield nor the waste package survives an igneous intrusion, so the flux splitting submodel is not used in the igneous scenario class. The flow model is validated in an independent model validation technical review. The drip shield and waste package flux splitting algorithms are developed and validated using experimental data. The transport model considers advective transport and diffusive transport

  20. An Acoustic Wave Equation for Tilted Transversely Isotropic Media...

    Office of Scientific and Technical Information (OSTI)

    Citation Details In-Document Search Title: An Acoustic Wave Equation for Tilted Transversely Isotropic Media A finite-difference method for computing the first arrival traveltimes ...

  1. SENSE-Project-Abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    response to ASCR Program Announcement LAB 15-1295 SENSE: SDN for End-to-end Networked Science at the Exascale Lead PI: Inder Monga, Lawrence Berkeley National Lab, imonga@es.net, 510-499-8065 Team: ANL - Linda Winkler, Kate Keahey, Caltech - Harvey Newman, Ramiro Voicu, FNAL - Phil DeMar, LBNL/ESnet - Chin Guok, John MacAuley, LBNL/NERSC - Jason Hick, UMD/MAX - Tom Lehman, Xi Yang, Alberto Jimenez Abstract: Traditionally, WAN and campus networks and services have evolved independently from each

  2. abstract-kerenyi

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Use of TRANSIMS to Analyze Large-Scale Land-Use Changes: Status Update John Kerenyi City of Moreno Valley 14177 Frederick St P.O. Box 88005 Moreno Valley, CA 92553 (951) 413-3199 This email address is being protected from spambots. You need JavaScript enabled to view it. List of Authors ================ John Kerenyi Abstract ========= In 2008 the City of Moreno Valley was awarded a contract to develop a TRANSIMS traffic model of the Southern California region based on the current (2004) MPO's

  3. prakash_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cyclotron Colloquium on Friday, April 18, 2014, at 11:00 am in Room 300 Refreshments will be served at 10:45 am Title: The neutron star in Cassiopeia A and what it is telling us? Professor Madappa Prakash Ohio University Athens, Ohio, USA Abstract: The neutron star in Cassiopeia A (Cas A) is now 333 years old and is the youngest known star from which thermal emission for over a decade has been observed. Initial reports from the analysis of archival data indicated Cas A's surface temperature to

  4. mabiala_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cyclotron Colloquium on Friday, August 17th, 2016, at 3:45 pm in Room 228 Refreshments will be served at 3:30 pm Dr. Justin Mabiala Cyclotron Institute Abstract: Pre-equilibrium emission and its possible relation to alpha-clustering in nuclei Cluster structure effects in nuclei have been investigated looking to the preequilibrium particles emitted in the 16O+65Cu and 19F+62Ni reactions at the same beam velocity of 16 AMeV which lead to the same 81Rb* compound nucleus. Despite the slight

  5. How to Prepare Your Abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Prepare Your Abstract The abstract should provide a brief overview of your entire research. The abstract briefly states the research problem or purpose of the research (Introduction), how the problem was studied (Methods), what was discovered (Results), and how the results might be interpreted (Discussions and Conclusions). Acronyms may be used in an abstract, however they should be spelled out the first time they are used. Abstracts should be concise and descriptive. Symposium Abstract Format

  6. Energy Research Abstracts; (USA)

    SciTech Connect (OSTI)

    Rutkowski, R.W.; Henline, D.M.

    1991-01-01

    Energy Research Abstracts (ERA) provides abstracting and indexing coverage of all scientific and technical reports and patent applications originated by the US Department of Energy, its laboratories, energy centers, and contractors, as well as theses and conference papers and proceedings issued by these organizations in report form. Audiovisual materials, computer media (magnetic tapes, diskettes, etc.), and engineering drawings are included in this definition. ERA also covers other energy information prepared in report form by federal and state government organizations, foreign governments, and domestic and foreign universities and research organizations, provided that the full text of the document has been received by OSTI. Foreign report information is obtained through the International Energy Agency's fourteen nation Energy Technology Data Exchange, the International Atomic Energy Agency's International Nuclear Information System, or nation-to-nation agreements. The purpose of this publication is to announce documents produced or obtained by DOE that are not so readily available as journal articles, books, or patents. ERA does not cover nonreport literature. The scope of ERA encompasses DOE's research, development, demonstration, and technology programs resulting from its broad charter for energy sources, supplies, safety, environmental impacts, and regulation.

  7. EBS Radionuclide Transport Abstraction

    SciTech Connect (OSTI)

    J.D. Schreiber

    2005-08-25

    The purpose of this report is to develop and analyze the engineered barrier system (EBS) radionuclide transport abstraction model, consistent with Level I and Level II model validation, as identified in ''Technical Work Plan for: Near-Field Environment and Transport: Engineered Barrier System: Radionuclide Transport Abstraction Model Report Integration'' (BSC 2005 [DIRS 173617]). The EBS radionuclide transport abstraction (or EBS RT Abstraction) is the conceptual model used in the total system performance assessment for the license application (TSPA-LA) to determine the rate of radionuclide releases from the EBS to the unsaturated zone (UZ). The EBS RT Abstraction conceptual model consists of two main components: a flow model and a transport model. Both models are developed mathematically from first principles in order to show explicitly what assumptions, simplifications, and approximations are incorporated into the models used in the TSPA-LA. The flow model defines the pathways for water flow in the EBS and specifies how the flow rate is computed in each pathway. Input to this model includes the seepage flux into a drift. The seepage flux is potentially split by the drip shield, with some (or all) of the flux being diverted by the drip shield and some passing through breaches in the drip shield that might result from corrosion or seismic damage. The flux through drip shield breaches is potentially split by the waste package, with some (or all) of the flux being diverted by the waste package and some passing through waste package breaches that might result from corrosion or seismic damage. Neither the drip shield nor the waste package survives an igneous intrusion, so the flux splitting submodel is not used in the igneous scenario class. The flow model is validated in an independent model validation technical review. The drip shield and waste package flux splitting algorithms are developed and validated using experimental data. The transport model considers

  8. Biological & Environmental Research Abstracts Database

    Office of Scientific and Technical Information (OSTI)

    Welcome to the Biological and Environmental Research Abstracts Database The U.S. ... This database contains abstracts of research projects supported by the program. Work was ...

  9. Reconciliation of local and long range tilt correlations in underdoped...

    Office of Scientific and Technical Information (OSTI)

    powder diffraction and inelastic neutron scattering (INS) approaches. Long-range and static CuO tilt order with orthogonally inequivalent Cu-O bonds in the CuO planes in...

  10. Mechanical Engineering Department technical abstracts

    SciTech Connect (OSTI)

    Denney, R.M.

    1982-07-01

    The Mechanical Engineering Department publishes listings of technical abstracts twice a year to inform readers of the broad range of technical activities in the Department, and to promote an exchange of ideas. Details of the work covered by an abstract may be obtained by contacting the author(s). Overall information about current activities of each of the Department's seven divisions precedes the technical abstracts.

  11. Microsoft Word - mosel_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Physics is needed" Professor Ulrich Mosel Univ Giessen, Inst Theoret Phys, Giessen, Germany Abstract: Long baseline experiments with neutrinos require a precise knowledge of the ...

  12. Microsoft Word - roepke_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cluster formation in nuclear systems Professor Gerd Roepke Institute of Physics, Rostock University, Germany Abstract To describe cluster formation in nuclear matter at ...

  13. Microsoft Word - strickland_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    quark gluon plasma Dr. Michael Strickland Gettysburg College Abstract: In this talk I will review our theoretical understanding of the dynamics of a non- equilibrium quark ...

  14. Microsoft Word - mcnabb_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Dennis McNabb Lawrence Livermore National Laboratory Abstract: LLNL is an applied science laboratory that innovates technology to enable new ideas and concepts for government ...

  15. ABSTRACT

    Office of Scientific and Technical Information (OSTI)

    ... passed through Nafion tubing coiled inside a container containing silica gel desiccant. ... and the reductions in outdoor ozone production with cooler temperatures, the study was ...

  16. Abstract

    Office of Scientific and Technical Information (OSTI)

    ... to ensure successful operation of the test unit, had sufficient funds been available. ... principles for soot content detection, 3) test operation scheme, and 4) specifics ...

  17. ABSTRACT

    Office of Scientific and Technical Information (OSTI)

    ... Atlanta, GA, American Society of Heating, Refrigerating, and Air Conditioning Engineers, Inc. Beko, G., G. Clausen and C. J. Weschler (2008). "Sensory pollution from bag filters, ...

  18. Abstract:

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    will discuss recent experiments on the structural, chemical, and electronic properties of graphene and hBN, including high resolution electron microscopy where real-time dynamics...

  19. Abstract

    Office of Scientific and Technical Information (OSTI)

    Acknowledgements xv 1 Introduction ...... 1 1.1 Physics motivation ... Introduction 1.1 Physics motivation High momentum transfer phenomena are known to be a ...

  20. ABSTRACT

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    water was integral to the Site's Cold War nuclear production mission as it was used ... The study provides historic contexts for the site's Cold War history and a context for ...

  1. Abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Simulations showed actinide inventories stabilizing to steady levels while fresh actinide fuel from feedstocks of Spent Nuclear Fuel or uranium-238 or thorium-232 continued to be ...

  2. Abstract

    Office of Scientific and Technical Information (OSTI)

    Ridge, TN 37831-6131-6210 3Imaging & Nanoscale Characterization Group, Center for ... Microscopy and Fluorescence Techniques. Nanoscale 2009, 1, 40-49. 13 Petibois, C. Imaging ...

  3. Abstract:

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    A prototypical disease example is the brain cancer glioblastoma multiforme (GBM). At the molecular level, it is rare for any two GBM patients to appear as if they have the same ...

  4. Abstract

    Office of Scientific and Technical Information (OSTI)

    SAND2007-2331 Unlimited Release Printed April 2007 Autothermal Reforming of Natural Gas to Synthesis Gas Reference: KBR Paper 2031 Steven F. Rice and David P. Mann Prepared by ...

  5. ABSTRACT

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... standards barriers to progressive "value added" support for the utility grid or for economic benefits of intelligent distributed PV grid-tied systems. The IEEE Std1547 does ...

  6. ABSTRACT

    Office of Scientific and Technical Information (OSTI)

    ... Witterseh T. 2001. Environmental perception, SBS symptoms and performance of office work under combined exposure to temperature, noise and air pollution. PhD Thesis. International ...

  7. Abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Phase Fabrication Problems 5.4 Staggered Overlap Joint Design 6. D-spar Static & Modal Testing 79 6.1 Static Test Set-up 6.2 Static Test Results 6.3 Comparison Between Estimated...

  8. ABSTRACT

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    BROWNE, MICHAEL CHARLES. Preparation for Deployment of the Neutral Current Detectors (NCDs) for the Sudbury Neutrino Observatory (SNO). (Under the direction of John F. Wilkerson and Christopher R. Gould.) The Sudbury Neutrino Observatory (SNO) is the latest generation of solar neutrino experiments designed to investigate the Solar Neutrino Problem (SNP). Through detection of all flavors of neutrinos, SNO will be capable of testing the neutrino oscillation hypothesis as a solution to the SNP.

  9. Abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... at all currently operational coal and natural gas fired power plants in the U.S. ... Water Treatment and Use for Power Plant Cooling Peter H. Kobos, Sandia ...

  10. Technical abstracts: Mechanical engineering, 1990

    SciTech Connect (OSTI)

    Broesius, J.Y.

    1991-03-01

    This document is a compilation of the published, unclassified abstracts produced by mechanical engineers at Lawrence Livermore National Laboratory (LLNL) during the calendar year 1990. Many abstracts summarize work completed and published in report form. These are UCRL-JC series documents, which include the full text of articles to be published in journals and of papers to be presented at meetings, and UCID reports, which are informal documents. Not all UCIDs contain abstracts: short summaries were generated when abstracts were not included. Technical Abstracts also provides descriptions of those documents assigned to the UCRL-MI (miscellaneous) category. These are generally viewgraphs or photographs presented at meetings. An author index is provided at the back of this volume for cross referencing.

  11. Method to fabricate a tilted logpile photonic crystal

    DOE Patents [OSTI]

    Williams, John D.; Sweatt, William C.

    2010-10-26

    A method to fabricate a tilted logpile photonic crystal requires only two lithographic exposures and does not require mask repositioning between exposures. The mask and photoresist-coated substrate are spaced a fixed and constant distance apart using a spacer and the stack is clamped together. The stack is then tilted at a crystallographic symmetry angle (e.g., 45 degrees) relative to the X-ray beam and rotated about the surface normal until the mask is aligned with the X-ray beam. The stack is then rotated in plane by a small stitching angle and exposed to the X-ray beam to pattern the first half of the structure. The stack is then rotated by 180.degree. about the normal and a second exposure patterns the remaining half of the structure. The method can use commercially available DXRL scanner technology and LIGA processes to fabricate large-area, high-quality tilted logpile photonic crystals.

  12. Microsoft Word - linnyk_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Monday, May 22nd, at 1:30 pm "Dilepton production at SPS and RHIC energies" Dr. Olena Linnyk Frankfurt Institute for Advanced Study (FIAS), Frankfurt, Germany Abstract: Analysis of ...

  13. Microsoft Word - sakai_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    will be served at 3:30 pm New Result from RIKEN RIBF Dr. H. Sakai RIKEN, Wako. Japan Abstract: Very recent experimental results from RI Beam Factory(RIBF) of RIKEN will be...

  14. Microsoft Word - djawotho_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Pibero Djawotho Texas A&M University Abstract: For polarized protons colliding at RHIC energies, the production of jets and hadrons is dominated by gg and qg scattering, making the ...

  15. Tilted dipole model for bias-dependent photoluminescence pattern

    SciTech Connect (OSTI)

    Fujieda, Ichiro Suzuki, Daisuke; Masuda, Taishi

    2014-12-14

    In a guest-host system containing elongated dyes and a nematic liquid crystal, both molecules are aligned to each other. An external bias tilts these molecules and the radiation pattern of the system is altered. A model is proposed to describe this bias-dependent photoluminescence patterns. It divides the liquid crystal/dye layer into sub-layers that contain electric dipoles with specific tilt angles. Each sub-layer emits linearly polarized light. Its radiation pattern is toroidal and is determined by the tilt angle. Its intensity is assumed to be proportional to the power of excitation light absorbed by the sub-layer. This is calculated by the Lambert-Beer's Law. The absorption coefficient is assumed to be proportional to the cross-section of the tilted dipole moment, in analogy to the ellipsoid of refractive index, to evaluate the cross-section for each polarized component of the excitation light. Contributions from all the sub-layers are added to give a final expression for the radiation pattern. Self-absorption is neglected. The model is simplified by reducing the number of sub-layers. Analytical expressions are derived for a simple case that consists of a single layer with tilted dipoles sandwiched by two layers with horizontally-aligned dipoles. All the parameters except for the tilt angle can be determined by measuring transmittance of the excitation light. The model roughly reproduces the bias-dependent photoluminescence patterns of a cell containing 0.5?wt.?% coumarin 6. It breaks down at large emission angles. Measured spectral changes suggest that the discrepancy is due to self-absorption and re-emission.

  16. Poster Abstract of Eighteenth ARM STM

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    8 Science Team MeetingPoster Abstract 2008

  17. Poster Abstract of Seventeenth ARM STM

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    7 Science Team MeetingPoster Abstract 2007

  18. Effects of a tilted magnetic field in a Dirac double layer (Journal...

    Office of Scientific and Technical Information (OSTI)

    Effects of a tilted magnetic field in a Dirac double layer Citation Details In-Document Search Title: Effects of a tilted magnetic field in a Dirac double layer Authors: ...

  19. Microsoft Word - bardayan_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    May 15, 2012, at 3:45 pm Room MIST 102 at the Mitchell Institute Refreshment will be served at 3:30 pm New instruments and recent results in the study of transfer reactions at the HRIBF Dr. Dan Bardayan Oak Ridge National Laboratory Abstract: Single-nucleon transfer reactions on heavy neutron-rich nuclei are critical to providing an empirical foundation for the determination of the incredibly large neutron fluxes in extreme environments such as exploding stars, internal confinement fusion

  20. Microsoft Word - moody_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NSI Colloquium on Monday, August 27 at 3:45 pm in Hawking Auditorium--Mitchel Institute Refreshments will be served at 3:30 pm FORENSIC RADIOCHEMISTRY Dr. Ken Moody Chemical Sciences Division, Lawrence Livermore National Laboratory Abstract: Signatures inherent in a sample containing radionuclides give clues about the origin of the material. This information can be quite important when dealing with smuggled nuclear materials interdicted by law enforcement personnel, or potential debris samples

  1. Microsoft Word - nica2_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    June 1st at 3:30 PM " Experimental evidence of repeatability in high-spin data and phenomenological interpretation Part one: Differential distributions" Dr. Ninel Nica Cyclotron Institute, Texas A&M University Abstract: We present the experimental evidence of a general correlation property of high-spin physics that we named Repeatability, consisting in highly hierarchized ordering relationships in two-dimensional gamma-ray coincidence data. However despite its generality

  2. Microsoft Word - pang_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    12, 2010 at 3:45 pm "RF Carpet Development at the NSCL" Gregory K. Pang** Departments of Astronomy and Physics Univ. of Illinois, Urbana, IL NSCL, Michigan State University, E. Lansing, MI ABSTRACT: The slowing down and thermalizing of nuclear reaction products from projectile fragmentation processes is essential for allowing the study of rare isotopes in low-energy precision experiments. Current methods of stopping fast beams rely on gas filled linear chambers equipped with electrodes

  3. Microsoft Word - sherrill_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 6 at 3:45 PM Designer Nuclei: New possibilities with the Facility for Rare Isotope Beams Professor Brad Sherrill Abstract: A quest of experimental nuclear science is to synthesize atoms made of all possible combinations of neutrons, protons and electrons. In part, based on our current capabilities for creating new isotopes, our understanding of atomic nuclei has changed dramatically. Many of the so called basic properties of atomic nuclei turn out to not be as universal as we thought.

  4. Microsoft Word - wieloch_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    "Critical-like behavior in a lattice gas model" Professor Andrzej Wieloch M. Smoluchowski Inst. of Physics, Jagiellonian Univ., Krakow, Poland Abstract: The ALADIN multifragmentation data for reaction Au+Au at several hundreds A.MEV show features characteristic of critical behavior, which are very well reproduced by a bond percolation model. This suggests, in the context of the lattice gas model, that fragments are formed at nearly normal nuclear densities and temperatures

  5. Microsoft Word - xu_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Theory Seminar Friday, January 21st, at 4:00 pm Triangular flow and dihadron azimuthal correlations in heavy ion collisions Dr. Jun Xu Abstract The dihadron azimuthal correlations triggered by energetic particles in heavy ion collisions at RHIC are studied in a multiphase transport (AMPT) model. A double- peak structure at the away side of triggered particles is obtained after subtracting background correlations due to the elliptic flow as observed in experiments. Both the near-side peak and the

  6. EIS-0039: Motor Gasoline Deregulation and the Gasoline Tilt

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Economic Regulatory Administration developed this EIS to evaluate the environmental impacts, including social and economic impacts, that may result from either of two proposed regulatory changes: (1) the exemption of motor gasoline from the Department of Energy's Mandatory Petroleum Price and Allocation Regulations, and (2) the adoption of the gasoline tilt, a proposed regulation that would allow refiners to recover an additional amount of their total increased costs on gasoline.

  7. Revisiting the question: Does high-latitude solar activity lead low-latitude solar activity in time phase?

    SciTech Connect (OSTI)

    Kong, D. F.; Qu, Z. N.; Guo, Q. L.

    2014-05-01

    Cross-correlation analysis and wavelet transform methods are used to investigate whether high-latitude solar activity leads low-latitude solar activity in time phase or not, using the data of the Carte Synoptique solar filaments archive from 1919 March to 1989 December. From the cross-correlation analysis, high-latitude solar filaments have a time lead of 12 Carrington solar rotations with respect to low-latitude ones. Both the cross-wavelet transform and wavelet coherence indicate that high-latitude solar filaments lead low-latitude ones in time phase. Furthermore, low-latitude solar activity is better correlated with high-latitude solar activity of the previous cycle than with that of the following cycle, which is statistically significant. Thus, the present study confirms that high-latitude solar activity in the polar regions is indeed better correlated with the low-latitude solar activity of the following cycle than with that of the previous cycle, namely, leading in time phase.

  8. Microsoft Word - davinson_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    23 at 10:30 AM "Decay Spectroscopy at FAIR Using the Advanced Implantation Detector Array (AIDA)" Dr. Thomas Davinson The University of Edinburgh, UK Abstract: The objective of the Advanced Implantation Detector Array (AIDA) project is to develop, commission and exploit a state of the art silicon detector array for decay spectroscopy experiments at the SuperFRS, FAIR. Multi-GeV exotic ions will be implanted into the silicon detector array and AIDA will perform spectroscopy quality

  9. Microsoft Word - hohler_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    29th, 4:00 PM Bulk spectral function sum rule in QCD-like theories with a holographic dual Dr. Paul M. Hohler University of Illinois at Chicago Abstract: In this talk, the sum rule for the spectral function of the stress-energy tensor in the bulk (uniform dilatation) channel is derived for a general class of strongly coupled field theories. This class includes theories holographically dual to a theory of gravity coupled to a single scalar field, representing the operator of the scale anomaly. In

  10. Microsoft Word - saastamoinen_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    April 24, 2012, at 2:00 pm Refreshment will be served at 1:45 pm Beta-decay Studies for Nova Nucleosynthesis Dr. Antti Saastamoinen University of Jyväskylä / TAMU Abstract Classical novae occur in interacting binary systems, where hydrogen-rich material accretes on a white dwarf from its low-mass main-sequence companion. Eventually, the accretion of the hydrogen-rich matter leads to a thermonuclear runaway (TNR). Understanding the dynamics of the nova outbursts and the nucleosynthesis fueling

  11. Microsoft Word - sobotka_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    November 9th, at 3:45 pm 2p-2p decay in 8 C and other 2p decay cases in light nuclei Professor L. G. Sobotka Departments of Chemistry and Physics Washington University, St. Louis Abstract Recent technical advances have allowed for high-order correlation experiments to be done. We have primarily focused on experiments in which the final channel is composed of only alphas and protons. Three cases we have studied are: 6 Be, 10 C and 8 C via 3, 4, and 5-particle correlation experiments respectively.

  12. Microsoft Word - weber_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    March 9, at 3:45 pm "Neutron Stars as Astrophysical Laboratories for Nuclear and Particle Physics" Professor Fridolin Weber Department of Physics, San Diego State University Abstract: Neutron stars are among the most enigmatic objects that exist in the Universe. They are as massive as our Sun but are trillions of times smaller in volume. The matter in the cores of neutron stars is therefore compressed to densities that are several times greater than the densities of atomic nuclei. This

  13. Microsoft Word - yongseok_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Friday July 27, 2012, at 2:00 pm Room MIST 102 at the Mitchell Institute Refreshment will be served at 1:45 pm High spin resonances in hadron reactions Dr. Yongseok Department of Physics, Kyungpook National University, Korea Abstract: (I) To understand the reaction mechanisms of the baryon/meson production processes, it is necessary to consider high spin baryon fields since many resonances in the mass of 2 GeV carry spin higher than 3/2. In this talk, we will discuss how to introduce high spin

  14. Poster Abstract Guidelines | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Poster Abstract Guidelines Poster Abstract Guidelines Poster Abstract Guidelines.pdf (343.35 KB) More Documents & Publications Call For Abstracts (Student Research Forum) 2016 U.S. Department of Energy Race to Zero Student Design Competition Guide Microsoft Word - rDE-FOA-0000080.rtf

  15. Call for Abstracts | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Services » Environmental Justice » Call for Abstracts Call for Abstracts 2013 National Environmental Justice Conference and Training Program Call for Abstracts Please join us for the 2013 National Environmental Justice Conference and Training Program, April 3 - 5, 2013, co-located at the Howard University School of Law and the Marriott at Metro Center. Call for Abstracts (137.64 KB) More Documents & Publications CALL FOR ABSTRACTS for the 2014 National Environmental Justice Conference and

  16. An abstract approach to music.

    SciTech Connect (OSTI)

    Kaper, H. G.; Tipei, S.

    1999-04-19

    In this article we have outlined a formal framework for an abstract approach to music and music composition. The model is formulated in terms of objects that have attributes, obey relationships, and are subject to certain well-defined operations. The motivation for this approach uses traditional terms and concepts of music theory, but the approach itself is formal and uses the language of mathematics. The universal object is an audio wave; partials, sounds, and compositions are special objects, which are placed in a hierarchical order based on time scales. The objects have both static and dynamic attributes. When we realize a composition, we assign values to each of its attributes: a (scalar) value to a static attribute, an envelope and a size to a dynamic attribute. A composition is then a trajectory in the space of aural events, and the complex audio wave is its formal representation. Sounds are fibers in the space of aural events, from which the composer weaves the trajectory of a composition. Each sound object in turn is made up of partials, which are the elementary building blocks of any music composition. The partials evolve on the fastest time scale in the hierarchy of partials, sounds, and compositions. The ideas outlined in this article are being implemented in a digital instrument for additive sound synthesis and in software for music composition. A demonstration of some preliminary results has been submitted by the authors for presentation at the conference.

  17. Automatic recovery of missing amplitudes and phases in tilt-limited...

    Office of Scientific and Technical Information (OSTI)

    Automatic recovery of missing amplitudes and phases in tilt-limited electron crystallography of two-dimensional crystals Citation Details In-Document Search Title: Automatic...

  18. Environmental pollutant studies: FY 1980. [Lead abstract

    SciTech Connect (OSTI)

    Not Available

    1981-02-01

    Separate abstracts were prepared for the 16 papers presented in this annual report of the Energy and Environment Division. (KRM)

  19. The effects of gantry tilt on breast dose and image noise in cardiac CT

    SciTech Connect (OSTI)

    Hoppe, Michael E.; Gandhi, Diksha; Schmidt, Taly Gilat; Stevens, Grant M.; Foley, W. Dennis

    2013-12-15

    Purpose: This study investigated the effects of tilted-gantry acquisition on image noise and glandular breast dose in females during cardiac computed tomography (CT) scans. Reducing the dose to glandular breast tissue is important due to its high radiosensitivity and limited diagnostic significance in cardiac CT scans.Methods: Tilted-gantry acquisition was investigated through computer simulations and experimental measurements. Upon IRB approval, eight voxelized phantoms were constructed from previously acquired cardiac CT datasets. Monte Carlo simulations quantified the dose deposited in glandular breast tissue over a range of tilt angles. The effects of tilted-gantry acquisition on breast dose were measured on a clinical CT scanner (CT750HD, GE Healthcare) using an anthropomorphic phantom with MOSFET dosimeters in the breast regions. In both simulations and experiments, scans were performed at gantry tilt angles of 0°–30°, in 5° increments. The percent change in breast dose was calculated relative to the nontilted scan for all tilt angles. The percent change in noise standard deviation due to gantry tilt was calculated in all reconstructed simulated and experimental images.Results: Tilting the gantry reduced the breast dose in all simulated and experimental phantoms, with generally greater dose reduction at increased gantry tilts. For example, at 30° gantry tilt, the dosimeters located in the superior, middle, and inferior breast regions measured dose reductions of 74%, 61%, and 9%, respectively. The simulations estimated 0%–30% total breast dose reduction across the eight phantoms and range of tilt angles. However, tilted-gantry acquisition also increased the noise standard deviation in the simulated phantoms by 2%–50% due to increased pathlength through the iodine-filled heart. The experimental phantom, which did not contain iodine in the blood, demonstrated decreased breast dose and decreased noise at all gantry tilt angles.Conclusions: Tilting the

  20. Apparatus for raising or tilting a micromechanical structure

    DOE Patents [OSTI]

    Allen, James J.

    2008-09-09

    An active hinge apparatus is disclosed which can be used to raise a micromechanical structure (e.g. a plate or micromirror) on a substrate. The active hinge apparatus utilizes one or more of teeth protruding outward from an axle which also supports the micromechanical structure on one end thereof. A rack is used to engage the teeth and rotate the axle to raise the micromechanical structure and tilt the structure at an angle to the substrate. Motion of the rack is provided by an actuator which can be a mechanically-powered actuator, or alternately an electrostatic comb actuator or a thermal actuator. A latch can be optionally provided in the active hinge apparatus to lock the micromechanical structure in an "erected" position.

  1. Microelectromechanical apparatus for elevating and tilting a platform

    DOE Patents [OSTI]

    Miller, Samuel Lee; McWhorter, Paul Jackson; Rodgers, Murray Steven; Sniegowski, Jeffry J.; Barnes, Stephen M.

    2003-04-08

    A microelectromechanical (MEM) apparatus is disclosed which has a platform that can be elevated above a substrate and tilted at an arbitrary angle using a plurality of flexible members which support the platform and control its movement. Each flexible member is further controlled by one or more MEM actuators which act to bend the flexible member. The MEM actuators can be electrostatic comb actuators or vertical zip actuators, or a combination thereof. The MEM apparatus can include a mirror coating to form a programmable mirror for redirecting or switching one or more light beams for use in a projection display. The MEM apparatus with the mirror coating also has applications for switching light beams between optical fibers for use in a local area fiber optic network, or for use in fiber optic telecommunications or data communications systems.

  2. Microelectromechanical apparatus for elevating and tilting a platform

    DOE Patents [OSTI]

    Miller, Samuel Lee; McWhorter, Paul Jackson; Rodgers, Murray Steven; Sniegowski, Jeffry J.; Barnes, Stephen M.

    2004-07-06

    A microelectromechanical (MEM) apparatus is disclosed which has a platform that can be elevated above a substrate and tilted at an arbitrary angle using a plurality of flexible members which support the platform and control its movement. Each flexible member is further controlled by one or more MEM actuators which act to bend the flexible member. The MEM actuators can be electrostatic comb actuators or vertical zip actuators, or a combination thereof. The MEM apparatus can include a mirror coating to form a programmable mirror for redirecting or switching one or more light beams for use in a projection display. The MEM apparatus with-the mirror coating also has applications for switching light beams between optical fibers for use in a local area fiber optic network, or for use in fiber optic telecommunications or data communications systems.

  3. The Mid-latitude Continental Convective Clouds (MC3E) Experiment...

    Office of Scientific and Technical Information (OSTI)

    Program Document: The Mid-latitude Continental Convective Clouds (MC3E) Experiment Final Campaign Report Citation Details In-Document Search Title: The Mid-latitude Continental ...

  4. Poster Abstract of Nineteenth ARM STM

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    9 Science Team MeetingPoster Abstract 2009 Proceedings Proceedings Sorted by Title Proceedings Sorted by Author Proceedings Sorted by Category

  5. Analysis of complex networks using aggressive abstraction.

    SciTech Connect (OSTI)

    Colbaugh, Richard; Glass, Kristin.; Willard, Gerald

    2008-10-01

    This paper presents a new methodology for analyzing complex networks in which the network of interest is first abstracted to a much simpler (but equivalent) representation, the required analysis is performed using the abstraction, and analytic conclusions are then mapped back to the original network and interpreted there. We begin by identifying a broad and important class of complex networks which admit abstractions that are simultaneously dramatically simplifying and property preserving - we call these aggressive abstractions -- and which can therefore be analyzed using the proposed approach. We then introduce and develop two forms of aggressive abstraction: 1.) finite state abstraction, in which dynamical networks with uncountable state spaces are modeled using finite state systems, and 2.) onedimensional abstraction, whereby high dimensional network dynamics are captured in a meaningful way using a single scalar variable. In each case, the property preserving nature of the abstraction process is rigorously established and efficient algorithms are presented for computing the abstraction. The considerable potential of the proposed approach to complex networks analysis is illustrated through case studies involving vulnerability analysis of technological networks and predictive analysis for social processes.

  6. Microsoft Word - roepke_abstract2.pdf

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Professor Gerd Roepke University of Rostock, Germany Abstract: Correlations are significant for the properties of nuclear systems at low densities and moderate temperatures. ...

  7. AN ABSENCE OF FAST RADIO BURSTS AT INTERMEDIATE GALACTIC LATITUDES

    SciTech Connect (OSTI)

    Petroff, E.; Van Straten, W.; Bailes, M.; Barr, E. D.; Coster, P.; Flynn, C.; Keane, E. F.; Johnston, S.; Bates, S. D.; Keith, M. J.; Kramer, M.; Stappers, B. W.; Bhat, N. D. R.; Burgay, M.; Possenti, A.; Tiburzi, C.; Burke-Spolaor, S.; Champion, D.; Ng, C.; Levin, L.; and others

    2014-07-10

    Fast radio bursts (FRBs) are an emerging class of bright, highly dispersed radio pulses. Recent work by Thornton et al. has revealed a population of FRBs in the High Time Resolution Universe (HTRU) survey at high Galactic latitudes. A variety of progenitors have been proposed, including cataclysmic events at cosmological distances, Galactic flare stars, and terrestrial radio frequency interference. Here we report on a search for FRBs at intermediate Galactic latitudes (–15° latitudes. A revised rate estimate or another strong and heretofore unknown selection effect in Galactic latitude would provide closer agreement between the surveys' detection rates. The dearth of detections at low Galactic latitude disfavors a Galactic origin for these bursts.

  8. Method for removing tilt control in adaptive optics systems

    DOE Patents [OSTI]

    Salmon, Joseph Thaddeus

    1998-01-01

    A new adaptive optics system and method of operation, whereby the method removes tilt control, and includes the steps of using a steering mirror to steer a wavefront in the desired direction, for aiming an impinging aberrated light beam in the direction of a deformable mirror. The deformable mirror has its surface deformed selectively by means of a plurality of actuators, and compensates, at least partially, for existing aberrations in the light beam. The light beam is split into an output beam and a sample beam, and the sample beam is sampled using a wavefront sensor. The sampled signals are converted into corresponding electrical signals for driving a controller, which, in turn, drives the deformable mirror in a feedback loop in response to the sampled signals, for compensating for aberrations in the wavefront. To this purpose, a displacement error (gradient) of the wavefront is measured, and adjusted by a modified gain matrix, which satisfies the following equation: G'=(I-X(X.sup.T X).sup.-1 X.sup.T)G(I-A)

  9. Method for removing tilt control in adaptive optics systems

    DOE Patents [OSTI]

    Salmon, J.T.

    1998-04-28

    A new adaptive optics system and method of operation are disclosed, whereby the method removes tilt control, and includes the steps of using a steering mirror to steer a wavefront in the desired direction, for aiming an impinging aberrated light beam in the direction of a deformable mirror. The deformable mirror has its surface deformed selectively by means of a plurality of actuators, and compensates, at least partially, for existing aberrations in the light beam. The light beam is split into an output beam and a sample beam, and the sample beam is sampled using a wavefront sensor. The sampled signals are converted into corresponding electrical signals for driving a controller, which, in turn, drives the deformable mirror in a feedback loop in response to the sampled signals, for compensating for aberrations in the wavefront. To this purpose, a displacement error (gradient) of the wavefront is measured, and adjusted by a modified gain matrix, which satisfies the following equation: G{prime} = (I{minus}X(X{sup T} X){sup {minus}1}X{sup T})G(I{minus}A). 3 figs.

  10. Precision tip-tilt-piston actuator that provides exact constraint

    DOE Patents [OSTI]

    Hale, Layton C.

    1999-01-01

    A precision device which can precisely actuate three degrees of freedom of an optic mount, commonly referred to as tip, tilt, and piston. The device consists of three identical flexure mechanisms, an optic mount to be supported and positioned, a structure that supports the flexure mechanisms, and three commercially available linear actuators. The advantages of the precision device is in the arrangement of the constraints offered by the flexure mechanism and not in the particular design of the flexure mechanisms, as other types of mechanisms could be substituted. Each flexure mechanism constrains two degrees of freedom in the plane of the mechanisms and one direction is actuated. All other degrees of freedom are free to move within the range of flexure mechanisms. Typically, three flexure mechanisms are equally spaced in angle about to optic mount and arranged so that each actuated degree of freedom is perpendicular to the plane formed by the optic mount. This arrangement exactly constrains the optic mount and allows arbitrary actuated movement of the plane within the range of the flexure mechanisms. Each flexure mechanism provides a mechanical advantage, typically on the order of 5:1, between the commercially available actuator and the functional point on the optic mount. This improves resolution by the same ratio and stiffness by the square of the ratio.

  11. THEORY OF SOLAR MERIDIONAL CIRCULATION AT HIGH LATITUDES

    SciTech Connect (OSTI)

    Dikpati, Mausumi; Gilman, Peter A. E-mail: gilman@ucar.edu

    2012-02-10

    We build a hydrodynamic model for computing and understanding the Sun's large-scale high-latitude flows, including Coriolis forces, turbulent diffusion of momentum, and gyroscopic pumping. Side boundaries of the spherical 'polar cap', our computational domain, are located at latitudes {>=} 60 Degree-Sign . Implementing observed low-latitude flows as side boundary conditions, we solve the flow equations for a Cartesian analog of the polar cap. The key parameter that determines whether there are nodes in the high-latitude meridional flow is {epsilon} = 2{Omega}n{pi}H{sup 2}/{nu}, where {Omega} is the interior rotation rate, n is the radial wavenumber of the meridional flow, H is the depth of the convection zone, and {nu} is the turbulent viscosity. The smaller the {epsilon} (larger turbulent viscosity), the fewer the number of nodes in high latitudes. For all latitudes within the polar cap, we find three nodes for {nu} = 10{sup 12} cm{sup 2} s{sup -1}, two for 10{sup 13}, and one or none for 10{sup 15} or higher. For {nu} near 10{sup 14} our model exhibits 'node merging': as the meridional flow speed is increased, two nodes cancel each other, leaving no nodes. On the other hand, for fixed flow speed at the boundary, as {nu} is increased the poleward-most node migrates to the pole and disappears, ultimately for high enough {nu} leaving no nodes. These results suggest that primary poleward surface meridional flow can extend from 60 Degree-Sign to the pole either by node merging or by node migration and disappearance.

  12. PROBING THE UNIVERSE'S TILT WITH THE COSMIC INFRARED BACKGROUND DIPOLE

    SciTech Connect (OSTI)

    Fixsen, D. J.; Kashlinsky, A. E-mail: alexander.kashlinsky@nasa.gov

    2011-06-10

    Conventional interpretation of the observed cosmic microwave background (CMB) dipole is that all of it is produced by local peculiar motions. Alternative explanations requiring part of the dipole to be primordial have received support from measurements of large-scale bulk flows. A test of the two hypotheses is whether other cosmic dipoles produced by collapsed structures later than the last scattering coincide with the CMB dipole. One background is the cosmic infrared background (CIB) whose absolute spectrum was measured to {approx}30% by the COBE satellite. Over the 100-500 {mu}m wavelength range its spectral energy distribution can provide a probe of its alignment with the CMB. This is tested with the COBE FIRAS data set which is available for such a measurement because of its low noise and frequency resolution which are important for Galaxy subtraction. Although the FIRAS instrument noise is in principle low enough to determine the CIB dipole, the Galactic foreground is sufficiently close spectrally to keep the CIB dipole hidden. A similar analysis is performed with DIRBE, which-because of the limited frequency coverage-provides a poorer data set. We discuss strategies for measuring the CIB dipole with future instruments to probe the tilt and apply it to the Planck, Herschel, and the proposed Pixie missions. We demonstrate that a future FIRAS-like instrument with instrument noise a factor of {approx}10 lower than FIRAS would make a statistically significant measurement of the CIB dipole. We find that the Planck and Herschel data sets will not allow a robust CIB dipole measurement. The Pixie instrument promises a determination of the CIB dipole and its alignment with either the CMB dipole or the dipole galaxy acceleration vector.

  13. ARM - Instructions for Submitting Extended Abstracts

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Graphics should be sent as individual graphic files in their original software and NOT placed within the abstract. Createsize graphics to fit the image area. Make sure that any...

  14. Pulmonary toxicology of respirable particles. [Lead abstract

    SciTech Connect (OSTI)

    Sanders, C.L.; Cross, F.T.; Dagle, G.E.; Mahaffey, J.A.

    1980-09-01

    Separate abstracts were prepared for the 44 papers presented in these proceedings. The last paper (Stannard) in the proceedings is an historical review of the field of inhalation toxicology and is not included in the analytics. (DS)

  15. Microsoft Word - abstract-lacognata-tx_2012

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ASTROPHYSICAL ENERGIES Dr. M. La Cognata INFN-Laboratori Nazionali del Sud, Catania, Italy ABSTRACT The 19 F(p,) 16 O reaction is an important fluorine destruction channel in ...

  16. Earth Sciences Division collected abstracts: 1980

    SciTech Connect (OSTI)

    Henry, A.L.; Hornady, B.F.

    1981-10-15

    This report is a compilation of abstracts of papers, reports, and talks presented during 1980 at national and international meetings by members of the Earth Sciences Division, Lawrence Livermore National Laboratory. The arrangement is alphabetical (by author). For a given report, a bibliographic reference appears under the name of each coauthor, but the abstract itself is given only under the name of the first author (indicated in capital letters) or the first Earth Sciences Division author.

  17. Earth Sciences Division collected abstracts: 1979

    SciTech Connect (OSTI)

    Henry, A.L.; Schwartz, L.L.

    1980-04-30

    This report is a compilation of abstracts of papers, internal reports, and talks presented during 1979 at national and international meetings by members of the Earth Sciences Division, Lawrence Livermore Laboratory. The arrangement is alphabetical (by author). For a given report, a bibliographic reference appears under the name of each coauthor, but the abstract iself is given only under the name of the first author or the first Earth Sciences Division author. A topical index at the end of the report provides useful cross references, while indicating major areas of research interest in the Earth Sciences Division.

  18. Regulatory and technical reports (Abstract Index Journal)

    SciTech Connect (OSTI)

    Not Available

    1993-02-01

    This journal includes all formal reports in the NUREG series prepared by the NRC staff and contractors, proceedings of conferences and workshops, grants, and international agreement reports. The entries in this compilation are indexed for access by title and abstract, secondary report number, personal author, subject, NRC organization for staff and international agreements, contractor, international organization, and licensed facility.

  19. Natural radiation environment III. [Lead Abstract

    SciTech Connect (OSTI)

    Gesell, T.F.; Lowder, W.M.

    1980-01-01

    Separate abstracts were prepared for the 52 research papers presented at this symposium in April 1978. The major topics in this volume deal with penetrating radiation measurements, radiation surveys and population exposure, radioactivity in the indoor environment, and technologically enhanced natural radioactivity. (KRM)

  20. Blue-tilted tensor spectrum and thermal history of the Universe

    SciTech Connect (OSTI)

    Kuroyanagi, Sachiko; Takahashi, Tomo; Yokoyama, Shuichiro E-mail: tomot@cc.saga-u.ac.jp

    2015-02-01

    We investigate constraints on the spectral index of primordial gravitational waves (GWs), paying particular attention to a blue-tilted spectrum. Such constraints can be used to test a certain class of models of the early Universe. We investigate observational bounds from LIGO+Virgo, pulsar timing and big bang nucleosynthesis, taking into account the suppression of the amplitude at high frequencies due to reheating after inflation and also late-time entropy production. Constraints on the spectral index are presented by changing values of parameters such as reheating temperatures and the amount of entropy produced at late time. We also consider constraints under the general modeling approach which can approximately describe various scenarios of the early Universe. We show that the constraints on the blue spectral tilt strongly depend on the underlying assumption and, in some cases, a highly blue-tilted spectrum can still be allowed.

  1. Design and initial characterization of a compact, ultra high vacuum compatible, low frequency, tilt accelerometer

    SciTech Connect (OSTI)

    OToole, A. E-mail: riccardo.desalvo@gmail.com; Pea Arellano, F. E.; Rodionov, A. V.; Kim, C.; Shaner, M.; Asadoor, M.; Sobacchi, E.; Dergachev, V.; DeSalvo, R. E-mail: riccardo.desalvo@gmail.com; Bhawal, A.; Gong, P.; Lottarini, A.; Minenkov, Y.; Murphy, C.

    2014-07-15

    A compact tilt accelerometer with high sensitivity at low frequency was designed to provide low frequency corrections for the feedback signal of the Advanced Laser Interferometer Gravitational Wave Observatory active seismic attenuation system. It has been developed using a Tungsten Carbide ceramic knife-edge hinge designed to avoid the mechanical 1/f noise believed to be intrinsic in polycrystalline metallic flexures. Design and construction details are presented; prototype data acquisition and control limitations are discussed. The instrument's characterization reported here shows that the hinge is compatible with being metal-hysteresis-free, and therefore also free of the 1/f noise generated by the dislocation Self-Organized Criticality in the metal. A tiltmeter of this kind will be effective to separate the ground tilt component from the signal of horizontal low frequency seismometers, and to correct the ill effects of microseismic tilt in advanced seismic attenuation systems.

  2. A Method of Correcting for Tilt From Horizontal in Downwelling Shortwave Irradiance Measurements on Moving Platforms

    SciTech Connect (OSTI)

    Long, Charles N.; Bucholtz, Anthony; Jonsson, Haf; Schmid, Beat; Vogelmann, A. M.; Wood, John

    2010-04-14

    Significant errors occur in downwelling shortwave irradiance measurements made on moving platforms due to tilt from horizontal because, when the sun is not completely blocked by overhead cloud, the downwelling shortwave irradiance has a prominent directional component from the direct sun. A-priori knowledge of the partitioning between the direct and diffuse components of the total shortwave irradiance is needed to properly apply a correction for tilt. This partitioning information can be adequately provided using a newly available commercial radiometer that produces reasonable measurements of the total and diffuse shortwave irradiance, and by subtraction the direct shortwave irradiance, with no moving parts and regardless of azimuthal orientation. We have developed methodologies for determining the constant pitch and roll offsets of the radiometers for aircraft applications, and for applying a tilt correction to the total shortwave irradiance data. Results suggest that the methodology is for tilt up to +/-10°, with 90% of the data corrected to within 10 Wm-2 at least for clear-sky data. Without a proper tilt correction, even data limited to 5° of tilt as is typical current practice still exhibits large errors, greater than 100 Wm-2 in some cases. Given the low cost, low weight, and low power consumption of the SPN1 total and diffuse radiometer, opportunities previously excluded for moving platform measurements such as small Unmanned Aerial Vehicles and solar powered buoys now become feasible using our methodology. The increase in measurement accuracy is important, given current concerns over long-term climate variability and change especially over the 70% of the Earth’s surface covered by ocean where long-term records of these measurements are sorely needed and must be made on ships and buoys.

  3. Automatic identification of abstract online groups

    DOE Patents [OSTI]

    Engel, David W; Gregory, Michelle L; Bell, Eric B; Cowell, Andrew J; Piatt, Andrew W

    2014-04-15

    Online abstract groups, in which members aren't explicitly connected, can be automatically identified by computer-implemented methods. The methods involve harvesting records from social media and extracting content-based and structure-based features from each record. Each record includes a social-media posting and is associated with one or more entities. Each feature is stored on a data storage device and includes a computer-readable representation of an attribute of one or more records. The methods further involve grouping records into record groups according to the features of each record. Further still the methods involve calculating an n-dimensional surface representing each record group and defining an outlier as a record having feature-based distances measured from every n-dimensional surface that exceed a threshold value. Each of the n-dimensional surfaces is described by a footprint that characterizes the respective record group as an online abstract group.

  4. FFCAct Clearinghouse, Directory of abstracts. Revision 1

    SciTech Connect (OSTI)

    Harwood, T.

    1994-05-01

    The Federal Facility Compliance Act (FFCAct) Clearinghouse is a card catalog of information about the FFCAct and its requirements for developing Site Treatment Plans (STP). The information available in the clearinghouse includes abstracts describing computer applications, technical reports, and a list of technical experts. Information can be accessed for use in responding to FFCAct requirements, and the clearinghouse provides search capabilities on particular topics and issues related to STP development. Appendix A includes: contacts from each site, for which contact has been made, who are developing STPs; the FFCAct Clearinghouse Fact Sheet and; additional hard copy forms to be used to populate the database. This report contains 50 abstracts related to the Radioactive Waste Technical Support Program.

  5. Microsoft Word - harrison_abstract.docx

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ABSTRACT A Monte Carlo simulation can be used to model freeze-out from high energy collisions. Existing Monte Carlo freeze-out algorithms usually do not account consistently for all conservation laws, such as the conservation of momentum or the conservation of energy. This poster will document the author's work during his REU program, to develop a Monte Carlo simulation modeling the freeze-out from high energy nuclear collisions imposing momentum conservation. We briefly explain the sampling

  6. Suppression of n=1 Tilt Instability by Magnetic Shaping Coils in Rotamak Plasmas

    SciTech Connect (OSTI)

    Yang, X.; Petrov, Y.; Huang, T. S.

    2009-06-26

    Measurements from the array of Mirnov magnetic coils provide the first evidence for n=1 tilt and radial shift instabilities in a 40 ms field-reversed configuration (FRC) driven by rotating magnetic field. External plasma-shaping magnetic coils are utilized to suppress the n=1 instability modes. It is demonstrated that by energizing the middle shaping coil with 250-500 A current, the tilt mode is completely suppressed when a doublet FRC with an internal figure-of-eight separatrix is formed.

  7. SIMULATED FARADAY ROTATION MEASURES TOWARD HIGH GALACTIC LATITUDES

    SciTech Connect (OSTI)

    Akahori, Takuya; Kim, Jongsoo; Ryu, Dongsu; Gaensler, B. M. E-mail: akahori@physics.usyd.edu.au E-mail: ryu@canopus.cnu.ac.kr

    2013-04-20

    We study the Faraday rotation measure (RM) due to the Galactic magnetic field (GMF) toward high Galactic latitudes. The RM arises from the global, regular component as well as from the turbulent, random component of the GMF. We model the former based on observations and the latter using the data of magnetohydrodynamic turbulence simulations. For a large number of different GMF models, we produce mock RM maps around the Galactic poles and calculate various statistical quantities with the RM maps. We find that the observed medians of RMs toward the north and south Galactic poles, {approx}0.0 {+-} 0.5 rad m{sup -2} and {approx} + 6.3 {+-} 0.5 rad m{sup -2}, are difficult to explain with any of our many alternate GMF models. The standard deviation of observed RMs, {approx}9 rad m{sup -2}, is clearly larger than that of simulated RMs. The second-order structure function of observed RMs is substantially larger than that of simulated RMs, especially at small angular scales. We discuss other possible contributions to RM toward high Galactic latitudes. Besides observational errors and the intrinsic RM of background radio sources against which RM is observed, we suggest that the RM due to the intergalactic magnetic field may account for a substantial fraction of the observed RM. Finally, we note that reproducing the observed medians may require additional components or/and structures of the GMF that are not present in our models.

  8. Microsoft Word - McIntosh_abstract

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    23 at 2:00 PM Binary and Ternary Break-up of Excited Projectile-like Fragments Produced in 124 Xe + 112,124 Sn Reactions at E/A = 50MeV. Alan McIntosh Indiana University Abstract: Peripheral reactions of 124 Xe ions with 112,124 Sn target nuclei were examined by measuring charged particles in a highly segmented silicon/CsI(Tl) array at forward angles together with the measurement of coincident neutrons. Charged particles were identified for Z≤54 and isotopically resolved for Z≤14. Of

  9. Microsoft Word - mcintosh_abstract_2013.pdf

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Tuesday April 2nd, 2013, at 3:45 pm Room MIST 102 at the Mitchell Institute Refreshment will be served at 3:30 pm The Asymmetry Dependence of the Nuclear Caloric Curve Dr. Alan McIntosh Cyclotron Institute, TAMU Abstract: The nuclear caloric curve is a fundamental facet of the nuclear equation of state. By studying isotopically reconstructed sources produced in intermediate-energy heavy-ion collisions, we report for the first time a clear dependence of the caloric curve on the neutron-proton

  10. Influences of photosynthetically active radiation on cladode orientation, stem tilting, and height of cacti

    SciTech Connect (OSTI)

    Nobel, P.S.

    1981-08-01

    Stem orientation and morphology were investigated for 14 species of cacti in Chile, Ecuador, Mexico, and the United States. The interception of photosynthetically active radiation (PAR) was specifically considered for cladodes (flattened stems) of platyopuntias, for tilted cylindrical stems, and in the presence of surrounding vegetation.

  11. First results of a polychromatic artificial sodium star for the correction of tilt

    SciTech Connect (OSTI)

    Friedman, H.; Foy, R..; Tallon, M.; Migus, A.

    1996-03-06

    This paper presents the first results of a joint experiment carried out at Lawrence Livermore National Laboratory during January, 1996. Laser and optical systems were tested to provide a polychromatic artificial sodium star for the correction of tilt. This paper presents the results of that experiment.

  12. Exploring a possible origin of a 14 deg y-normal spin tilt at RHIC polarimeter

    SciTech Connect (OSTI)

    Meot, F.; Huang, H.

    2015-06-15

    A possible origin of a 14 deg y-normal spin n0 tilt at the polarimeter is in snake angle defects. This possible cause is investigated by scanning the snake axis angle µ, and the spin rotation angle at the snake, φ, in the vicinity of their nominal values.

  13. Current Abstracts Nuclear Reactors and Technology

    SciTech Connect (OSTI)

    Bales, J.D.; Hicks, S.C.

    1993-01-01

    This publication Nuclear Reactors and Technology (NRT) announces on a monthly basis the current worldwide information available from the open literature on nuclear reactors and technology, including all aspects of power reactors, components and accessories, fuel elements, control systems, and materials. This publication contains the abstracts of DOE reports, journal articles, conference papers, patents, theses, and monographs added to the Energy Science and Technology Database during the past month. Also included are US information obtained through acquisition programs or interagency agreements and international information obtained through acquisition programs or interagency agreements and international information obtained through the International Energy Agency`s Energy Technology Data Exchange or government-to-government agreements. The digests in NRT and other citations to information on nuclear reactors back to 1948 are available for online searching and retrieval on the Energy Science and Technology Database and Nuclear Science Abstracts (NSA) database. Current information, added daily to the Energy Science and Technology Database, is available to DOE and its contractors through the DOE Integrated Technical Information System. Customized profiles can be developed to provide current information to meet each user`s needs.

  14. Poster Abstract of Eighteenth ARM STM: Sort by Title

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... Clouds ABSTRACT, POSTER Kollias, P., Albrecht, B., and Ghate, V. A Simulation of ... Clouds ABSTRACT, POSTER Ghate, V. and Albrecht, B. TWP Cloud Behavior Analyses - ...

  15. Poster Abstract of Nineteenth ARM STM: Sort by Title

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... Multi-Scale Simulations of Stratocumulus Clouds at the SGP Site ABSTRACT Zhu, P., Albrecht... Present, and Future ABSTRACT, POSTER Albrecht, B., Kollias, P., and Ghate, V. Spatial ...

  16. Selection of a numerical unsaturated flow code for tilted capillary barrier performance evaluation

    SciTech Connect (OSTI)

    Webb, S.W. [Sandia National Labs., Albuquerque, NM (United States). Geohydrology Dept.

    1996-09-01

    Capillary barriers consisting of tilted fine-over-coarse layers have been suggested as landfill covers as a means to divert water infiltration away from sensitive underground regions under unsaturated flow conditions, especially for arid and semi-arid regions. Typically, the HELP code is used to evaluate landfill cover performance and design. Unfortunately, due to its simplified treatment of unsaturated flow and its essentially one-dimensional nature, HELP is not adequate to treat the complex multidimensional unsaturated flow processes occurring in a tilted capillary barrier. In order to develop the necessary mechanistic code for the performance evaluation of tilted capillary barriers, an efficient and comprehensive unsaturated flow code needs to be selected for further use and modification. The present study evaluates a number of candidate mechanistic unsaturated flow codes for application to tilted capillary barriers. Factors considered included unsaturated flow modeling, inclusion of evapotranspiration, nodalization flexibility, ease of modification, and numerical efficiency. A number of unsaturated flow codes are available for use with different features and assumptions. The codes chosen for this evaluation are TOUGH2, FEHM, and SWMS{_}2D. All three codes chosen for this evaluation successfully simulated the capillary barrier problem chosen for the code comparison, although FEHM used a reduced grid. The numerical results are a strong function of the numerical weighting scheme. For the same weighting scheme, similar results were obtained from the various codes. Based on the CPU time of the various codes and the code capabilities, the TOUGH2 code has been selected as the appropriate code for tilted capillary barrier performance evaluation, possibly in conjunction with the infiltration, runoff, and evapotranspiration models of HELP. 44 refs.

  17. Call For Abstracts (Student Research Forum) | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Call For Abstracts (Student Research Forum) Call For Abstracts (Student Research Forum) Call For Abstracts (Student Research Forum).pdf (439.22 KB) More Documents & Publications Poster Abstract Guidelines 2015 National Environmental Justice Conference and Training Program Concludes in Washington, DC Program Update: 4th Quarter 2011

  18. ABSTRACT: Bioenergy Harvesting Technologies to Supply Crop Residues In a

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Densified Large Square Bale Format | Department of Energy abstract

  19. ABSTRACT: Bioenergy Harvesting Technologies to Supply Crop Residues In a

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Densified Large Square Bale Format | Department of Energy abstract_1

  20. DOE NABIR PI Workshop: Abstracts 2002

    SciTech Connect (OSTI)

    Hawkes , Dan

    2002-01-09

    The mission of the NABIR program is to provide the fundamental science that will serve as the basis for the development of cost-effective bioremediation and long-term stewardship of radionuclides and metals in the subsurface at DOE sites. The focus of the program is on strategies leading to long-term immobilization of contaminants in place to reduce the risk to humans and the environment. Contaminants of special interest are uranium, technetium, plutonium, chromium, and mercury. The focus of the NABIR program is on the bioremediation of these contaminants in the subsurface below the root zone, including both vadose and saturated zones. The program is implemented through four interrelated scientific research elements (Biogeochemistry, Biomolecular Science and Engineering, Biotransformation, and Community Dynamics/Microbial Ecology); and through an element called Bioremediation and its Societal Implications and Concerns (BASIC), which addresses societal issues and potential concerns of stakeholders. The material presented at this year's workshop focuses on approximately 60 research projects funded in FY 2000-2002 by DOE's Office of Biological and Environmental Research (BER). Abstracts of NABIR research projects are provided in this book.

  1. DOE-NABIR PI Workshop: Abstracts 2003

    SciTech Connect (OSTI)

    Various

    2003-01-28

    The mission of the NABIR program is to provide the fundamental science that will serve as the basis for the development of cost-effective bioremediation and long-term stewardship of radionuclides and metals in the subsurface at DOE sites. The focus of the program is on strategies leading to long-term immobilization of contaminants in situ to reduce the risk to humans and the environment. Contaminants of special interest are uranium, technetium, plutonium, chromium, and mercury. The focus of the NABIR program is on the bioremediation of these contaminants in the subsurface below the root zone, including both vadose and saturated zones. The program consists of four interrelated Science Elements (Biotransformation, Community Dynamics/Microbial Ecology, Biomolecular Science and Engineering, and Biogeochemistry). The program also has a cross-cutting Assessment Element that supports development of innovative approaches and technologies to support the science elements. An element called Bioremediation and its Societal Implications and Concerns (BASIC) addresses potential societal issues of implementing NABIR scientific findings. The material presented at this year's workshop focuses on approximately 60 research projects funded in FY 2000-2003 by the Environmental Remediation Sciences Division in DOE's Office of Biological and Environmental Research (BER) in the Office of Science. Abstracts of NABIR research projects are provided in this book.

  2. Microsoft Word - Tilted-Rig-TP-Definition-Version1-Aug-14-2012A.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Test Problem: Tilted Rayleigh-Taylor for 2-D Mixing Studies Authors: Malcolm J. Andrews (XCP-4, LANL), 505-606-1430, mandrews@lanl.gov David L. Youngs (AWE) , david.youngs@awe.co.uk Daniel Livescu (CCS-2, LANL), 505-665-1758, livescu@lanl.gov Date: August 10, 2012 Version: 1.0 LA-UR: 12-24091 Contents 1. Introduction................................................................................................................................. 2 2. Problem definition

  3. Cosmological signatures of tilted isocurvature perturbations: reionization and 21cm fluctuations

    SciTech Connect (OSTI)

    Sekiguchi, Toyokazu; Sugiyama, Naoshi; Tashiro, Hiroyuki; Silk, Joseph E-mail: hiroyuki.tashiro@asu.edu E-mail: naoshi@nagoya-u.jp

    2014-03-01

    We investigate cosmological signatures of uncorrelated isocurvature perturbations whose power spectrum is blue-tilted with spectral index 2?tilted isocurvature primordial power spectrum. We also study the consequences for 21cm line fluctuations due to neutral hydrogens in minihalos. Combination of measurements of the reionization optical depth and 21cm line fluctuations will provide complementary probes of a highly blue-tilted isocurvature power spectrum.

  4. DSNF AND OTHER WASTE FORM DEGRADATION ABSTRACTION

    SciTech Connect (OSTI)

    J. CUNNANE

    2004-11-19

    Several hundred distinct types of DOE-owned spent nuclear fuel (DSNF) may potentially be disposed in the Yucca Mountain repository. These fuel types represent many more types than can be viably individually examined for their effect on the Total System Performance Assessment for the License Application (TSPA-LA). Additionally, for most of these fuel types, there is no known direct experimental test data for the degradation and dissolution of the waste form in repository groundwaters. The approach used in the TSPA-LA model is, therefore, to assess available information on each of 11 groups of DSNF, and to identify a model that can be used in the TSPA-LA model without differentiating between individual codisposal waste packages containing different DSNF types. The purpose of this report is to examine the available data and information concerning the dissolution kinetics of DSNF matrices for the purpose of abstracting a degradation model suitable for use in describing degradation of the DSNF inventory in the Total System Performance Assessment for the License Application. The data and information and associated degradation models were examined for the following types of DSNF: Group 1--Naval spent nuclear fuel; Group 2--Plutonium/uranium alloy (Fermi 1 SNF); Group 3--Plutonium/uranium carbide (Fast Flux Test Facility-Test Fuel Assembly SNF); Group 4--Mixed oxide and plutonium oxide (Fast Flux Test Facility-Demonstration Fuel Assembly/Fast Flux Test Facility-Test Demonstration Fuel Assembly SNF); Group 5--Thorium/uranium carbide (Fort St. Vrain SNF); Group 6--Thorium/uranium oxide (Shippingport light water breeder reactor SNF); Group 7--Uranium metal (N Reactor SNF); Group 8--Uranium oxide (Three Mile Island-2 core debris); Group 9--Aluminum-based SNF (Foreign Research Reactor SNF); Group 10--Miscellaneous Fuel; and Group 11--Uranium-zirconium hydride (Training Research Isotopes-General Atomics SNF). The analyses contained in this document provide an ''upper-limit'' (i

  5. Effects of the scatter in sunspot group tilt angles on the large-scale magnetic field at the solar surface

    SciTech Connect (OSTI)

    Jiang, J.; Cameron, R. H.; Schüssler, M.

    2014-08-10

    The tilt angles of sunspot groups represent the poloidal field source in Babcock-Leighton-type models of the solar dynamo and are crucial for the build-up and reversals of the polar fields in surface flux transport (SFT) simulations. The evolution of the polar field is a consequence of Hale's polarity rules, together with the tilt angle distribution which has a systematic component (Joy's law) and a random component (tilt-angle scatter). We determine the scatter using the observed tilt angle data and study the effects of this scatter on the evolution of the solar surface field using SFT simulations with flux input based upon the recorded sunspot groups. The tilt angle scatter is described in our simulations by a random component according to the observed distributions for different ranges of sunspot group size (total umbral area). By performing simulations with a number of different realizations of the scatter we study the effect of the tilt angle scatter on the global magnetic field, especially on the evolution of the axial dipole moment. The average axial dipole moment at the end of cycle 17 (a medium-amplitude cycle) from our simulations was 2.73 G. The tilt angle scatter leads to an uncertainty of 0.78 G (standard deviation). We also considered cycle 14 (a weak cycle) and cycle 19 (a strong cycle) and show that the standard deviation of the axial dipole moment is similar for all three cycles. The uncertainty mainly results from the big sunspot groups which emerge near the equator. In the framework of Babcock-Leighton dynamo models, the tilt angle scatter therefore constitutes a significant random factor in the cycle-to-cycle amplitude variability, which strongly limits the predictability of solar activity.

  6. Division of Environmental Control Technology Program, 1979. [Lead abstract

    SciTech Connect (OSTI)

    1980-06-01

    Separate abstracts were prepared for the 10 sections in this progress report dealing with environmental engineering. (KRM)

  7. Abstract: Design and Demonstration of an Advanced Agricultural Feedstock

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Supply System for Lignocellulosic Bioenergy Production | Department of Energy Abstract: Design and Demonstration of an Advanced Agricultural Feedstock Supply System for Lignocellulosic Bioenergy Production Abstract: Design and Demonstration of an Advanced Agricultural Feedstock Supply System for Lignocellulosic Bioenergy Production This abstract from FDC Enterprises discusses the impact and objectives for project that designs equipment improvements to streamline the harvest, staging, and

  8. Entanglement, avoided crossings, and quantum chaos in an Ising model with a tilted magnetic field

    SciTech Connect (OSTI)

    Karthik, J.; Sharma, Auditya; Lakshminarayan, Arul [Department of Physics, Indian Institute of Technology Madras, Chennai 600036 (India)

    2007-02-15

    We study a one-dimensional Ising model with a magnetic field and show that tilting the field induces a transition to quantum chaos. We explore the stationary states of this Hamiltonian to show the intimate connection between entanglement and avoided crossings. In general, entanglement gets exchanged between the states undergoing an avoided crossing with an overall enhancement of multipartite entanglement at the closest point of approach, simultaneously accompanied by diminishing two-body entanglement as measured by concurrence. We find that both for stationary as well as nonstationary states, nonintegrability leads to a destruction of two-body correlations and distributes entanglement more globally.

  9. Dual-frequency terahertz emission from splitting filaments induced by lens tilting in air

    SciTech Connect (OSTI)

    Zhang, Zhelin; Chen, Yanping Yang, Liu; Yuan, Xiaohui; Liu, Feng; Chen, Min; Xu, Jianqiu; Zhang, Jie; Sheng, Zhengming

    2014-09-08

    Dual-frequency terahertz radiation from air-plasma filaments produced with two-color lasers in air has been demonstrated experimentally. When a focusing lens is tilted for a few degrees, it is shown that the laser filament evolves from a single one to two sub-filaments. Two independent terahertz sources emitted from the sub-filaments with different frequencies and polarizations are identified, where the frequency of terahertz waves from the trailing sub-filament is higher than that from the leading sub-filament.

  10. Thermal conductivity of Bi{sub 2}Te{sub 3} tilted nanowires, a molecular dynamics study

    SciTech Connect (OSTI)

    Li, Shen Lacroix, David; Termentzidis, Konstantinos; Chaput, Laurent; Stein, Nicolas; Frantz, Cedric

    2015-06-08

    Evidence for an excellent compromise between structural stability and low thermal conductivity has been achieved with tilted Bi{sub 2}Te{sub 3} nanowires. The latter ones were recently fabricated and there is a need in modeling and characterization. The structural stability and the thermal conductivity of Bi{sub 2}Te{sub 3} nanowires along the tilted [015]* direction and along the [010] direction have been explored. For the two configurations of nanowires, the effect of the length and the cross section on the thermal conductivity is discussed. The thermal conductivity of infinite size tilted nanowire is 0.34?W/m K, significantly reduced compared to nanowire along the [010] direction (0.59?W/m K). This reveals that in Bi{sub 2}Te{sub 3} nanowires the structural anisotropy can be as important as size effects to reduce the thermal conductivity. The main reason is the reduction of the phonon mean free path which is found to be 1.7?nm in the tilted nanowires, compared to 5.3?nm for the nanowires along the [010] direction. The fact that tilted Bi{sub 2}Te{sub 3} nanowire is mechanically stable and it has extremely low thermal conductivity suggests these nanowires as a promising material for future thermoelectric generation application.

  11. Measurement and modeling of solar irradiance components on horizontal and tilted planes

    SciTech Connect (OSTI)

    Padovan, Andrea; Col, Davide del

    2010-12-15

    In this work new measurements of global and diffuse solar irradiance on the horizontal plane and global irradiance on planes tilted at 20 and 30 oriented due South and at 45 and 65 oriented due East are used to discuss the modeling of solar radiation. Irradiance data are collected in Padova (45.4 N, 11.9 E, 12 m above sea level), Italy. Some diffuse fraction correlations have been selected to model the hourly diffuse radiation on the horizontal plane. The comparison with the present experimental data shows that their prediction accuracy strongly depends on the sky characteristics. The hourly irradiance measurements taken on the tilted planes are compared with the estimations given by one isotropic and three anisotropic transposition models. The use of an anisotropic model, based on a physical description of the diffuse radiation, provides a much better accuracy, especially when measurements of the diffuse irradiance on the horizontal plane are not available and thus transposition models have to be applied in combination with a diffuse fraction correlation. This is particularly significant for the planes oriented away from South. (author)

  12. THE TRANSIT INGRESS AND THE TILTED ORBIT OF THE EXTRAORDINARILY ECCENTRIC EXOPLANET HD 80606b

    SciTech Connect (OSTI)

    Winn, Joshua N.; Howard, Andrew W.; Marcy, Geoffrey W.; Johnson, John Asher; Gazak, J. Zachary; Starkey, Donn; Ford, Eric B.; Colon, Knicole D.; Reyes, Francisco; Nortmann, Lisa; Dreizler, Stefan; Odewahn, Stephen; Welsh, William F.; Kadakia, Shimonee; Vanderbei, Robert J.; Adams, Elisabeth R.; Lockhart, Matthew; Crossfield, Ian J.; Valenti, Jeff A.; Dantowitz, Ronald

    2009-10-01

    We present the results of a transcontinental campaign to observe the 2009 June 5 transit of the exoplanet HD 80606b. We report the first detection of the transit ingress, revealing the transit duration to be 11.64 +- 0.25 hr and allowing more robust determinations of the system parameters. Keck spectra obtained at midtransit exhibit an anomalous blueshift, giving definitive evidence that the stellar spin axis and planetary orbital axis are misaligned. The Keck data show that the projected spin-orbit angle lambda is between 32 deg. and 87 deg. with 68.3% confidence and between 14 deg. and 142 deg. with 99.73% confidence. Thus, the orbit of this planet is not only highly eccentric (e = 0.93) but is also tilted away from the equatorial plane of its parent star. A large tilt had been predicted, based on the idea that the planet's eccentric orbit was caused by the Kozai mechanism. Independently of the theory, it is worth noting that all three exoplanetary systems with known spin-orbit misalignments have massive planets on eccentric orbits, suggesting that those systems migrate through a different channel than lower mass planets on circular orbits.

  13. Abstracts | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Abstracts Chemical Sciences, Geosciences, & Biosciences (CSGB) Division CSGB Home About Research Areas Reports and Activities Science Highlights Principal Investigators' Meetings BES Home Third DOE BES Separations Research Workshop Abstracts Print Text Size: A A A FeedbackShare Page Third DOE/BES Separations Research Workshop Presentation Abstracts Last Modified May 18, 1999 High Pressure and High Temperature Spectroscopic Studies of Supercritical Fluid Solutions Clement R. Yonker

  14. Selected Translated Abstracts of Chinese-Language Climate Change Publications

    SciTech Connect (OSTI)

    Cushman, R.M.; Burtis, M.D.

    1999-05-01

    This report contains English-translated abstracts of important Chinese-language literature concerning global climate change for the years 1995-1998. This body of literature includes the topics of adaptation, ancient climate change, climate variation, the East Asia monsoon, historical climate change, impacts, modeling, and radiation and trace-gas emissions. In addition to the biological citations and abstracts translated into English, this report presents the original citations and abstracts in Chinese. Author and title indexes are included to assist the reader in locating abstracts of particular interest.

  15. Poster Abstract of Seventeenth ARM STM: Sort by Title

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... ABSTRACT, POSTER Ghate, V., Albrecht, B., and Kollias, P. Annual Variation of ... POSTER Zhu, P., Kollias, P., and Albrecht, B. ARM Mobile Facility Deployment in ...

  16. Abstract: Development and Deployment of a Short Rotation Woody...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Crops Harvesting System Based on a Case New Holland Forage Harvester and SRC Woody Crop Header Abstract: Development and Deployment of a Short Rotation Woody Crops Harvesting ...

  17. 7th international symposium on photosynthetic prokaryotes. Abstracts

    SciTech Connect (OSTI)

    Fuller, R.C.

    1991-12-31

    This book contains the abstracts of all the presentations made either in oral or poster form, at the VII International Symposium on Photosynthetic Prokaryotes.

  18. Kinetics of the Hydrogen Atom Abstraction Reactions from 1-Butanol...

    Office of Scientific and Technical Information (OSTI)

    Theory Matches Experiment and More Citation Details In-Document Search Title: Kinetics of the Hydrogen Atom Abstraction Reactions from 1-Butanol by Hydroxyl Radical: Theory ...

  19. Alamos National Laboratory] Materials Science(36) Abstract Not...

    Office of Scientific and Technical Information (OSTI)

    Co-Design at the Mesoscale: Opportunities for NSLS-II Sarrao, John L. Los Alamos National Laboratory Materials Science(36) Abstract Not Provided Los Alamos National Laboratory...

  20. Microsoft Word - SoS abstract-bio_template.doc

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and the Social Brain Dr. Michael Graziano Professor of Psychology, Princeton University Princeton New Jersey ABSTRACT: What is consciousness and how can a brain, a mere ...

  1. Microsoft Word - Call for Abstracts Student Research Forum.docx

    Energy Savers [EERE]

    Environmental Sciences Preferred abstract submissions will address environmental exposures and triggers, e.g., air pollution and respiratory health, proximity to hazardous waste, ...

  2. Molecular biology of signal transduction in plants. Abstracts

    SciTech Connect (OSTI)

    Not Available

    1991-12-31

    This volume contains abstracts of oral presentations and poster sessions of the 1991 Cold Springs Harbor Meeting entitled Molecular Biology of Signal Transduction in Plants.

  3. Deep Borehole Disposal of Spent Fuel. Brady, Patrick V. Abstract...

    Office of Scientific and Technical Information (OSTI)

    Spent Fuel. Brady, Patrick V. Abstract not provided. Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States) USDOE National Nuclear Security Administration (NNSA)...

  4. 24th Annual Anomalous Absorption Conference. Book of abstracts

    SciTech Connect (OSTI)

    Not Available

    1994-08-01

    This report contains abstracts on topics in the following areas: parametric instabilities; hohlraum physics; laser plasma physics with short pulses; and rayleigh-taylor instability and hydrodynamics.

  5. Chemical Hieroglyphs: Abstract Depiction of Complex Void Space...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Chemical Hieroglyphs: Abstract Depiction of Complex Void Space Topology of Nanoporous Materials Previous Next List Kevin Theisen, Berend Smit and Maciej Haranczyk, J. Chem. Inf. ...

  6. ABSTRACT: Bioenergy Harvesting Technologies to Supply Crop Residues...

    Broader source: Energy.gov (indexed) [DOE]

    advanced logistical systems and focused bioenergy harvesting technologies that supply crop ... More Documents & Publications ABSTRACT: Bioenergy Harvesting Technologies to Supply Crop ...

  7. Abstract: Design and Demonstration of an Advanced Agricultural...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Design and Demonstration of an Advanced Agricultural Feedstock Supply System for Lignocellulosic Bioenergy Production Abstract: Design and Demonstration of an Advanced Agricultural ...

  8. Observation of tilting activities in translated field reversed configuration plasma using computer tomography at two different cross sections

    SciTech Connect (OSTI)

    Yoshimura, Satoru; Sugimoto, Satoshi; Okada, Shigefumi

    2007-11-15

    Tilting activities of field reversed configuration (FRC) plasma were observed in translation experiments using computer tomography (CT) at two different cross sections in the FRC injection experiment (FIX) machine [S. Okada et al., Nucl. Fusion 47, 677 (2007)]. In these experiments, two sets of CT devices were installed at the upstream and downstream sides of the confinement chamber of the FIX. Each CT device was composed of three arrays of detectors sensitive to the near-infrared radiation. The peak of the reconstructed emission profile at one side was displaced from the center of the cross section of the chamber. On the other hand, the reconstructed profile at the other side was located around the center. This result suggests that the FRC plasma was tilting in the axial direction. The occurrence of the observed tilting activities had almost no effect on the lifetime of the FRC plasma.

  9. Abstract: Design and Demonstration of an Advanced Agricultural Feedstock

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Supply System for Lignocellulosic Bioenergy Production | Department of Energy Design and Demonstration of an Advanced Agricultural Feedstock Supply System for Lignocellulosic Bioenergy Production Abstract: Design and Demonstration of an Advanced Agricultural Feedstock Supply System for Lignocellulosic Bioenergy Production This abstract from FDC Enterprises discusses the impact and objectives for project that designs equipment improvements to streamline the harvest, staging, and hauling costs

  10. Three-dimensional microelectromechanical tilting platform operated by gear-driven racks

    DOE Patents [OSTI]

    Klody, Kelly A.; Habbit, Jr., Robert D.

    2005-11-01

    A microelectromechanical (MEM) tiltable-platform apparatus is disclosed which utilizes a light-reflective platform (i.e. a micromirror) which is supported above a substrate by flexures which can be bent upwards to tilt the platform in any direction over an angle of generally .+-.10 degrees using a gear-driven rack attached to each flexure. Each rack is driven by a rotary microengine (i.e. a micromotor); and an optional thermal actuator can be used in combination with each microengine for initially an initial uplifting of the platform away from the substrate. The MEM apparatus has applications for optical switching (e.g. between a pair of optical fibers) or for optical beam scanning.

  11. Bose-Einstein condensates on tilted lattices: Coherent, chaotic, and subdiffusive dynamics

    SciTech Connect (OSTI)

    Kolovsky, Andrey R.; Gomez, Edgar A.; Korsch, Hans Juergen

    2010-02-15

    The dynamics of a (quasi-) one-dimensional interacting atomic Bose-Einstein condensate in a tilted optical lattice is studied in a discrete mean-field approximation, i.e., in terms of the discrete nonlinear Schroedinger equation. If the static field is varied, the system shows a plethora of dynamical phenomena. In the strong field limit, we demonstrate the existence of (almost) nonspreading states which remain localized on the lattice region populated initially and show coherent Bloch oscillations with fractional revivals in the momentum space (so-called quantum carpets). With decreasing field, the dynamics becomes irregular, however, still confined in configuration space. For even weaker fields, we find subdiffusive dynamics with a wave-packet width growing as t{sup 1/4}.

  12. Test Problem: Tilted Rayleigh-Taylor for 2-D Mixing Studies

    SciTech Connect (OSTI)

    Andrews, Malcolm J.; Livescu, Daniel; Youngs, David L.

    2012-08-14

    The 'tilted-rig' test problem originates from a series of experiments (Smeeton & Youngs, 1987, Youngs, 1989) performed at AWE in the late 1980's, that followed from the 'rocket-rig' experiments (Burrows et al., 1984; Read & Youngs, 1983), and exploratory experiments performed at Imperial College (Andrews, 1986; Andrews and Spalding, 1990). A schematic of the experiment is shown in Figure 1, and comprises a tank filled with light fluid above heavy, and then 'tilted' on one side of the apparatus, thus causing an 'angled interface' to the acceleration history due to rockets. Details of the configuration given in the next chapter include: fluids, dimensions, and other necessary details to simulate the experiment. Figure 2 shows results from two experiments, Case 110 (which is the source for this test problem) that has an Atwood number of 0.5, and Case 115 (a secondary source described in Appendix B), with Atwood of 0.9 Inspection of the photograph in Figure 2 (the main experimental diagnostic) for Case 110. reveals two main areas for mix development; 1) a large-scale overturning motion that produces a rising plume (spike) on the left, and falling plume (bubble) on the right, that are almost symmetric; and 2) a Rayleigh-Taylor driven mixing central mixing region that has a large-scale rotation associated with the rising and falling plumes, and also experiences lateral strain due to stretching of the interface by the plumes, and shear across the interface due to upper fluid moving downward and to the right, and lower fluid moving upward and to the left. Case 115 is similar but differs by a much larger Atwood of 0.9 that drives a strong asymmetry between a left side heavy spike penetration and a right side light bubble penetration. Case 110 is chosen as the source for the present test problem as the fluids have low surface tension (unlike Case 115) due the addition of a surfactant, the asymmetry small (no need to have fine grids for the spike), and there is extensive

  13. Characteristics of optical emissions and particle precipitation in mid/low-latitude aurorae

    SciTech Connect (OSTI)

    Rassoul K., H.R.

    1987-01-01

    Ground-based optical observations have been made at low/mid latitudes to study the auroral effects of particle precipitation. The measured optical emissions include (OI) 5577 {Angstrom}, (OI) 6300 {Angstrom}, and (OI) 7774 {Angstrom} of atomic oxygen, the Balmer-{beta} line of Hydrogen at 4861 {Angstrom}; and the emission bands from the first negative nitrogen system at 3914 {Angstrom} and 4278 {Angstrom}. Spectral characteristics of low-latitude aurorae, the correlation of optical data with geomagnetic field variations, and the nature of the precipitating particles were established. The observed auroral emissions have characteristics appropriate to the precipitation into the thermosphere of heavy energetic (keV energy) particles and/or electrons of energy of the order of eV rather than the keV electron precipitation as in the high-latitude auroral zone. The latitude variation of optical emissions shows a strong increase from low to mid latitudes, and the strongest emissions occur in the evening to midnight local time period. The particle precipitation enhances at times when there is a populated and/or energized ring current and there exists a strong magnetic perturbation near the local meridian of the precipitation.

  14. Uranium vacancy mobility at the Σ5 symmetric tilt and Σ5 twist grain boundaries in UO₂

    SciTech Connect (OSTI)

    Uberuaga, Blas Pedro; Andersson, David A.

    2015-10-01

    Ionic transport at grain boundaries in oxides dictates a number of important phenomena, from ionic conductivity to sintering to creep. For nuclear fuels, it also influences fission gas bubble nucleation and growth. Here, using a combination of atomistic calculations and object kinetic Monte Carlo (okMC) simulations, we examine the kinetic pathways associated with uranium vacancies at two model grain boundaries in UO2. The barriers for vacancy motion were calculated using the nudged elastic band method at all uranium sites at each grain boundary and were used as the basis of the okMC simulations. For both boundaries considered – a simple tilt and a simple twist boundary – the mobility of uranium vacancies is significantly higher than in the bulk. For the tilt boundary, there is clearly preferred migration along the tilt axis as opposed to in the perpendicular direction while, for the twist boundary, migration is essentially isotropic within the boundary plane. These results show that cation defect mobility in fluorite-structured materials is enhanced at certain types of grain boundaries and is dependent on the boundary structure with the tilt boundary exhibiting higher rates of migration than the twist boundary.

  15. Uranium vacancy mobility at the Σ5 symmetric tilt and Σ5 twist grain boundaries in UO₂

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Uberuaga, Blas Pedro; Andersson, David A.

    2015-10-01

    Ionic transport at grain boundaries in oxides dictates a number of important phenomena, from ionic conductivity to sintering to creep. For nuclear fuels, it also influences fission gas bubble nucleation and growth. Here, using a combination of atomistic calculations and object kinetic Monte Carlo (okMC) simulations, we examine the kinetic pathways associated with uranium vacancies at two model grain boundaries in UO2. The barriers for vacancy motion were calculated using the nudged elastic band method at all uranium sites at each grain boundary and were used as the basis of the okMC simulations. For both boundaries considered – a simplemore » tilt and a simple twist boundary – the mobility of uranium vacancies is significantly higher than in the bulk. For the tilt boundary, there is clearly preferred migration along the tilt axis as opposed to in the perpendicular direction while, for the twist boundary, migration is essentially isotropic within the boundary plane. These results show that cation defect mobility in fluorite-structured materials is enhanced at certain types of grain boundaries and is dependent on the boundary structure with the tilt boundary exhibiting higher rates of migration than the twist boundary.« less

  16. The Bioelectromagnetic Society Thirteenth Annual Meeting 1991: Program and abstracts

    SciTech Connect (OSTI)

    Not Available

    1992-12-31

    This volume contains author abstracts representing oral and poster presentations made at the Thirteenth Annual Meeting of The Bioelectromagnetic Society held in Salt Lake City, Utah June 23--27, 1991.

  17. Small Business Innovation Research. Abstracts of Phase I awards, 1999

    SciTech Connect (OSTI)

    1999-12-01

    This booklet presents technical abstracts of Phase I awards made in Fiscal Year (FY) 1999 under the DOE Small Business Innovation Research (SBIR) program. SBIR research explores innovative concepts in important technological and scientific areas that can lead to valuable new technology and products. The work described in the abstracts is novel, high-risk research, but the benefits will also be potentially high if the objectives are met. Brief comments on the potential applications, as described by the awardee, are given after each abstract. Individuals and organizations, including venture capital and larger industrial firms, with an interest in the research described in any of the abstracts are encouraged to contact the appropriate small business directly.

  18. Earth Sciences Division annual report 1981. [Lead abstract

    SciTech Connect (OSTI)

    Not Available

    1982-09-01

    Separate abstracts were prepared for the 59 papers of the 1981 annual report of the Earth Sciences Division at Lawrence Berkeley Laboratory. The general topics covered included nuclear waste isolation, geophysics and reservoir engineering, and geosciences. (KRM)

  19. SERS internship Fall 1992--Spring 1993: Abstract and research papers

    SciTech Connect (OSTI)

    Not Available

    1993-08-05

    This report contains the abstracts and research papers by students on a variety of topics in engineering, genetics, solid state physics, thermonuclear energy, astrophysics, and other science related topics.

  20. GRC 2009 Annual Meeting Announced, Call for Abstracts Issued

    Broader source: Energy.gov [DOE]

    The Geothermal Resources Council (GRC) issued a call for abstracts today with the announcement of the world’s largest geothermal event taking place October 4-7, 2009, in Reno, Nevada, at the Peppermill Resort Spa Casino.

  1. Abstracts and research accomplishments of university coal research projects

    SciTech Connect (OSTI)

    Not Available

    1991-06-01

    The Principal Investigators of the grants supported by the University Coal Research Program were requested to submit abstracts and highlight accomplishments of their projects in time for distribution at a grantees conference. This book is a compilation of the material received in response to the request. Abstracts discuss the following area: coal science, coal surface science, reaction chemistry, advanced process concepts, engineering fundamentals and thermodynamics, environmental science.

  2. Abstracts | U.S. DOE Office of Science (SC)

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Reports » Abstracts Basic Energy Sciences (BES) BES Home About Research Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC) Community Resources Program Summaries Brochures Reports Abstracts Accomplishments Presentations BES and Congress Science for Energy Flow Seeing Matter Nano for Energy Scale of Things Chart Contact Information Basic Energy Sciences U.S. Department of Energy SC-22/Germantown Building 1000 Independence Ave., SW

  3. Conference Abstracts & Book Chapters | Photosynthetic Antenna Research

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Center Conference Abstracts & Book Chapters Conference Abstracts & Book Chapters Collins AM, Wen J and Blankenship RE (2011) Photosynthetic Light Harvesting Complexes. In Molecular Solar Fuels, T. Wydrzynski and W. Hillier, Eds., Royal Society of Chemistry, Cambridge, UK. Frank HA, Magdaong N, Niedzwiedzki DM, LaFountain AM, Gardiner AT, Carey A-M, Gibson GN, and Cogdell RJ (2014) Investigation of the excited state spectra and dynamics of rhodopinal glucoside from Rhodoblastus

  4. SRS scientific and technical abstracts, July--September 1992

    SciTech Connect (OSTI)

    Not Available

    1992-10-01

    This document focuses on the scientific and technical information (STT) reports, articles, and presentations generated at the site by various authors and organizations of Westinghouse Savannah River Company and its subcontractors. Abstracts of these STI products are contained within this document. The abstracts have been compiled as they originally appeared in the source reports. No changes to the content have been made except as necessary to correct errors of spelling, to reduce abstract length, or to ensure that the information is unclassified. The abstracts are organized according to information categories ( UC'' categories) established by the Department of Energy's Office of Scientific and Technical Information (OSTI). When reports fall into more than one category, their abstract is included as an entry in the most applicable section of this document. UC-700 General, Miscellaneous, and Progress Reports, UC-701 Chemistry, UC-702 Environmental Sciences, UC-703 Geosciences, UC-704 Materials, UC-705 Mathematics and Computer Sciences, UC-706 Engineering, Equipment, and Instruments, UC-707 Health and Safety, UC-708 Biological Sciences, UC-711 Chemical Separation Processes for Plutonium and Uranium, UC-712 Inertial Confinement Fusion, UC-713 Radioisotope and Radiation Applications, UC-714 Criticality Studies, UC-715 Technology - Feed Materials, UC-721 Defense Waste Management, UC-722 Transportation of Nuclear Materials, UC-731 Nuclear Materials Production, UC-732 Special Isotope Separation (Plutonium), UC-733 Nuclear Raw Materials, UC-741 Chemical High Explosives, UC-742 Applications of Explosions, UC-743 Nuclear Propulsion Systems, UC-744 Aerospace Nuclear Safety, and Index 91.

  5. SRS scientific and technical abstracts, July--September 1992

    SciTech Connect (OSTI)

    Not Available

    1992-10-01

    This document focuses on the scientific and technical information (STT) reports, articles, and presentations generated at the site by various authors and organizations of Westinghouse Savannah River Company and its subcontractors. Abstracts of these STI products are contained within this document. The abstracts have been compiled as they originally appeared in the source reports. No changes to the content have been made except as necessary to correct errors of spelling, to reduce abstract length, or to ensure that the information is unclassified. The abstracts are organized according to information categories (``UC`` categories) established by the Department of Energy`s Office of Scientific and Technical Information (OSTI). When reports fall into more than one category, their abstract is included as an entry in the most applicable section of this document. UC-700 General, Miscellaneous, and Progress Reports, UC-701 Chemistry, UC-702 Environmental Sciences, UC-703 Geosciences, UC-704 Materials, UC-705 Mathematics and Computer Sciences, UC-706 Engineering, Equipment, and Instruments, UC-707 Health and Safety, UC-708 Biological Sciences, UC-711 Chemical Separation Processes for Plutonium and Uranium, UC-712 Inertial Confinement Fusion, UC-713 Radioisotope and Radiation Applications, UC-714 Criticality Studies, UC-715 Technology - Feed Materials, UC-721 Defense Waste Management, UC-722 Transportation of Nuclear Materials, UC-731 Nuclear Materials Production, UC-732 Special Isotope Separation (Plutonium), UC-733 Nuclear Raw Materials, UC-741 Chemical High Explosives, UC-742 Applications of Explosions, UC-743 Nuclear Propulsion Systems, UC-744 Aerospace Nuclear Safety, and Index 91.

  6. Vulnerability analysis for complex networks using aggressive abstraction.

    SciTech Connect (OSTI)

    Colbaugh, Richard; Glass, Kristin L.

    2010-06-01

    Large, complex networks are ubiquitous in nature and society, and there is great interest in developing rigorous, scalable methods for identifying and characterizing their vulnerabilities. This paper presents an approach for analyzing the dynamics of complex networks in which the network of interest is first abstracted to a much simpler, but mathematically equivalent, representation, the required analysis is performed on the abstraction, and analytic conclusions are then mapped back to the original network and interpreted there. We begin by identifying a broad and important class of complex networks which admit vulnerability-preserving, finite state abstractions, and develop efficient algorithms for computing these abstractions. We then propose a vulnerability analysis methodology which combines these finite state abstractions with formal analytics from theoretical computer science to yield a comprehensive vulnerability analysis process for networks of realworld scale and complexity. The potential of the proposed approach is illustrated with a case study involving a realistic electric power grid model and also with brief discussions of biological and social network examples.

  7. Calculation of Latitude and Longitude for Points on Perimeter of a Circle on a Sphere

    SciTech Connect (OSTI)

    Morris, Heidi E.

    2015-08-14

    This document describes the calculation of the Earth-Centered Earth Fixed (ECEF) coordinates for points lying on the perimeter of a circle. Here, the perimeter of the circle lies on the surface of the sphere and the center of the planar circle is below the surface. These coordinates are converted to latitude and longitude for mapping fields on the surface of the earth.

  8. Comprehensive kinetic analysis of the plasma-wall transition layer in a strongly tilted magnetic field

    SciTech Connect (OSTI)

    Tskhakaya, D. D.; Kos, L.

    2014-10-15

    The magnetized plasma-wall transition (MPWT) layer at the presence of the obliquity of the magnetic field to the wall consists of three sub-layers: the Debye sheath (DS), the magnetic pre-sheath (MPS), and the collisional pre-sheath (CPS) with characteristic lengths ?{sub D} (electron Debye length), ?{sub i} (ion gyro-radius), and ? (the smallest relevant collision length), respectively. Tokamak plasmas are usually assumed to have the ordering ?{sub D}??{sub i}??, when the above-mentioned sub-layers can be distinctly distinguished. In the limits of ?{sub Dm}(?{sub D}/?{sub i})?0 and ?{sub mc}(?{sub i}/?)?0 (asymptotic three-scale (A3S) limits), these sub-layers are precisely defined. Using the smallness of the tilting angle of the magnetic field to the wall, the ion distribution functions are found for three sub-regions in the analytic form. The equations and characteristic length-scales governing the transition (intermediate) regions between the neighboring sub-layers (CPS MPS and MPS DS) are derived, allowing to avoid the singularities arising from the ?{sub Dm}?0 and ?{sub mc}?0 approximations. The MPS entrance and the related kinetic form of the BohmChodura condition are successfully defined for the first time. At the DS entrance, the Bohm condition maintains its usual form. The results encourage further study and understanding of physics of the MPWT layers in the modern plasma facilities.

  9. Segregation and Migration of the Oxygen Vacancies in the 3 (111) Tilt Grain Boundaries of Ceria

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Yuan, Fenglin; Liu, Bin; Zhang, Yanwen; Weber, William J.

    2016-03-01

    In nanocrystalline materials, defect-grain boundary (GB) interaction plays a key role in determining the structure stability, as well as size-dependent ionic, electronic, magnetic and chemical properties. In this study, we systematically investigated using density functional theory segregation and migration of oxygen vacancies at the Σ3 [110] / (111) grain boundary of ceria. Three oxygen layers near the GB are predicted to be segregation sites for oxygen vacancies. Moreover, the presence of oxygen vacancies stabilizes this tilt GB at a low Fermi level and/or oxygen poor conditions. An atomic strain model was proposed to rationalize layer dependency of the relaxation energymore » for +2 charged oxygen vacancy. The structural origin of large relaxation energies at layers 1 and 2 was determined to be free-volume space that induces ion relaxation towards the GB. Our results not only pave the way for improving the oxygen transport near GBs of ceria, but also provide important insights into engineering the GB structure for better ionic, magnetic and chemical properties of nanocrystalline ceria.« less

  10. Noncircular skyrmion and its anisotropic response in thin films of chiral magnets under a tilted magnetic field

    SciTech Connect (OSTI)

    Lin, Shi-Zeng; Saxena, Avadh

    2015-11-03

    Here we study the equilibrium and dynamical properties of skyrmions in thin films of chiral magnets with oblique magnetic field. The shape of an individual skyrmion is non-circular and the skyrmion density decreases with the tilt angle from the normal of films. As a result, the interaction between two skyrmions depends on the relative angle between them in addition to their separation. The triangular lattice of skyrmions under a perpendicular magnetic field is distorted into a centered rectangular lattice for a tilted magnetic field. For a low skyrmion density, skyrmions form a chain like structure. Lastly, the dynamical response of the non-circular skyrmions depends on the direction of external currents.

  11. Noncircular skyrmion and its anisotropic response in thin films of chiral magnets under a tilted magnetic field

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lin, Shi-Zeng; Saxena, Avadh

    2015-11-03

    Here we study the equilibrium and dynamical properties of skyrmions in thin films of chiral magnets with oblique magnetic field. The shape of an individual skyrmion is non-circular and the skyrmion density decreases with the tilt angle from the normal of films. As a result, the interaction between two skyrmions depends on the relative angle between them in addition to their separation. The triangular lattice of skyrmions under a perpendicular magnetic field is distorted into a centered rectangular lattice for a tilted magnetic field. For a low skyrmion density, skyrmions form a chain like structure. Lastly, the dynamical response ofmore » the non-circular skyrmions depends on the direction of external currents.« less

  12. Micromagnetic study of spin transfer switching with a spin polarization tilted out of the free layer plane

    SciTech Connect (OSTI)

    Chaves-O'Flynn, Gabriel D. Wolf, Georg; Pinna, Daniele; Kent, Andrew D.

    2015-05-07

    We present the results of zero temperature macrospin and micromagnetic simulations of spin transfer switching of thin film nanomagnets in the shape of an ellipse with a spin-polarization tilted out of the layer plane. The perpendicular component of the spin-polarization is shown to increase the reversal speed, leading to a lower current for switching in a given time. However, for tilt angles larger than a critical angle, the layer magnetization starts to precess about an out-of-plane axis, which leads to a final magnetization state that is very sensitive to simulation conditions. As the ellipse lateral size increases, this out-of-plane precession is suppressed, due to the excitation of spatially non-uniform magnetization modes.

  13. Nineteenth annual actinide separations conference: Conference program and abstracts

    SciTech Connect (OSTI)

    Bronson, M.

    1995-12-31

    This report contains the abstracts from the conference presentations. Sessions were divided into the following topics: Waste treatment; Spent fuel treatment; Issues and responses to Defense Nuclear Facility Safety Board 94-1; Pyrochemical technologies; Disposition technologies; and Aqueous separation technologies.

  14. Recent advances in yeast molecular biology: recombinant DNA. [Lead abstract

    SciTech Connect (OSTI)

    Not Available

    1982-09-01

    Separate abstracts were prepared for the 25 papers presented at a workshop focusing on chromosomal structure, gene regulation, recombination, DNA repair, and cell type control, that have been obtained by experimental approaches incorporating the new technologies of yeast DNA transformation, molecular cloning, and DNA sequence analysis. (KRM)

  15. National conference on environmental remediation science and technology: Abstracts

    SciTech Connect (OSTI)

    1998-12-31

    This conference was held September 8--10, 1998 in Greensboro, North Carolina. The purpose of this conference was to provide a multidisciplinary forum for exchange of state-of-the-art information on methods and site characterization technologies for environmental monitoring and remedial action planning of hazardous materials. This report contains the abstracts of sixty-one papers presented at the conference.

  16. Human genome program report. Part 2, 1996 research abstracts

    SciTech Connect (OSTI)

    1997-11-01

    This report contains Part 2 of a two-part report to reflect research and progress in the US Department of Energy Human Genome Program from 1994 through 1996, with specified updates made just before publication. Part 2 consists of 1996 research abstracts. Attention is focused on the following: sequencing; mapping; informatics; ethical, legal, and social issues; infrastructure; and small business innovation research.

  17. Abstract and research accomplishments of University Coal Research Projects

    SciTech Connect (OSTI)

    1995-06-01

    The Principal Investigators of the grants supported by the University Coal Research Program were requested to submit abstracts and highlight accomplishments of their respective projects in time for distribution at a conference on June 13--14, 1995 at Tennessee State University in Nashville, Tennessee. This book is a compilation of the material received in response to that request. For convenience, the 70 grants reported in this book are stored into eight technical areas, Coal Science, Coal Surface Science, Reaction Chemistry, Advanced Process Concepts, Engineering Fundamentals and Thermodynamics, Environmental Science, high Temperature Phenomena, and Special topics. Indexes are provided for locating projects by subject, principal investigators, and contracting organizations. Each extended abstract describes project objectives, work accomplished, significance to the Fossil Energy Program, and plans for the next year.

  18. Multi-Year Lags between Forest Browning and Soil Respiration at High Northern Latitudes

    SciTech Connect (OSTI)

    Bond-Lamberty, Benjamin; Bunn, Andrew G.; Thomson, Allison M.

    2012-11-26

    High-latitude northern ecosystems are experiencing rapid climate changes, and represent a large potential climate feedback because of their high soil carbon densities and shifting disturbance regimes. A significant carbon flow from these ecosystems is soil respiration (RS, the flow of carbon dioxide, generated by plant roots and soil fauna, from the soil surface to atmosphere), and any change in the high-latitude carbon cycle might thus be reflected in RS observed in the field. This study used two variants of a machine-learning algorithm and least squares regression to examine how remotely-sensed canopy greenness (NDVI), climate, and other variables are coupled to annual RS based on 105 observations from 64 circumpolar sites in a global database. The addition of NDVI roughly doubled model performance, with the best-performing models explaining ~62% of observed RS variability

  19. ABSTRACTS: Seventh annual conference on fossil energy materials

    SciTech Connect (OSTI)

    Not Available

    1993-01-01

    Objective of the Advanced Research and Technology Development materials program is to conduct R and D on materials for fossil energy applications (coal processing, coal liquefaction, gasification, heat engines and recovery, combustion systems, fuel cells). Research is aimed at better understanding of materials in fossil energy environments and development of new materials for improvement of plant operations and reliability. Abstracts are given of 37 papers on ceramics/composites, intermetallics (iron aluminides, etc.), and advanced austenitics. (DLC)

  20. ABSTRACTS: Seventh annual conference on fossil energy materials

    SciTech Connect (OSTI)

    Not Available

    1993-06-01

    Objective of the Advanced Research and Technology Development materials program is to conduct R and D on materials for fossil energy applications (coal processing, coal liquefaction, gasification, heat engines and recovery, combustion systems, fuel cells). Research is aimed at better understanding of materials in fossil energy environments and development of new materials for improvement of plant operations and reliability. Abstracts are given of 37 papers on ceramics/composites, intermetallics (iron aluminides, etc.), and advanced austenitics. (DLC)

  1. Observed Regimes of Mid-Latitude.and Tropical Cirrus Microphysical Behavior

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Observed Regimes of Mid-Latitude and Tropical Cirrus Microphysical Behavior A. D. Del Genio and A. B. Wolf National Aeronautics Space Administration Goddard Institute for Space Studies New York, New York G. G. Mace University of Utah Salt Lake City, Utah L. M. Miloshevich National Center for Atmospheric Research Boulder, Colorado Introduction Little is known about the climatological microphysical properties of cirrus clouds. Thus, general circulation model (GCM) cirrus parameterizations often

  2. Cluster Analysis of Cloud Regimes and Characteristic Dynamics of Mid-Latitude Synoptic Systems

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Cluster Analysis of Cloud Regimes and Characteristic Dynamics of Mid-Latitude Synoptic Systems N. D. Gordon and J. R. Norris Scripps Institution of Oceanography University of California San Diego, La Jolla, California C. P. Weaver Center for Environmental Prediction Rutgers University New Brunswick, New Jersey S. A. Klein Geophysical Fluid Dynamics Laboratory Princeton University Princeton, New Jersey Introduction This study uses a clustering algorithm to group meteorological regimes by cloud

  3. Coherent radar estimates of average high-latitude ionospheric Joule heating

    SciTech Connect (OSTI)

    Kosch, M.J.; Nielsen, E.

    1995-07-01

    The Scandinavian Twin Auroral Radar Experiment (STARE) and Sweden and Britain Radar Experiment (SABRE) bistatic coherent radar systems have been employed to estimate the spatial and temporal variation of the ionospheric Joule heating in the combined geographic latitude range 63.8 deg - 72.6 deg (corrected geomagnetic latitude 61.5 deg - 69.3 deg) over Scandinavia. The 173 days of good observations with all four radars have been analyzed during the period 1982 to 1986 to estimate the average ionospheric electric field versus time and latitude. The AE dependent empirical model of ionospheric Pedersen conductivity of Spiro et al. (1982) has been used to calculate the Joule heating. The latitudinal and diurnal variation of Joule heating as well as the estimated mean hemispherical heating of 1.7 x 10(exp 11) W are in good agreement with earlier results. Average Joule heating was found to vary linearly with the AE, AU, and AL indices and as a second-order power law with Kp. The average Joule heating was also examined as a function of the direction and magnitude of the interplanetary magnetic field. It has been shown for the first time that the ionospheric electric field magnitude as well as the Joule heating increase with increasingly negative (southward) Bz.

  4. Impact of rising greenhouse gases on mid-latitude storm tracks and associated hydroclimate variability and change

    SciTech Connect (OSTI)

    Seager, Richard

    2014-12-08

    Project Summary This project aimed to advance physical understanding of how and why the mid-latitude jet streams and storm tracks shift in intensity and latitude in response to changes in radiative forcing with an especial focus on rising greenhouse gases. The motivation, and much of the work, stemmed from the importance that these mean and transient atmospheric circulation systems have for hydroclimate. In particular drying and expansion of the subtropical dry zones has been related to a poleward shift of the mid-latitude jets and storm tracks. The work involved integrated assessment of observation and model projections as well as targeted model simulations.

  5. Uranium vacancy mobility at the sigma 5 symmetric tilt grain boundary in UO2

    SciTech Connect (OSTI)

    Uberuaga, Blas P.

    2012-05-02

    An important consequence of the fissioning process occurring during burnup is the formation of fission products. These fission products alter the thermo-mechanical properties of the fuel. They also lead to macroscopic changes in the fuel structure, including the formation of bubbles that are connected to swelling of the fuel. Subsequent release of fission gases increase the pressure in the plenum and can cause changes in the properties of the fuel pin itself. It is thus imperative to understand how fission products, and fission gases in particular, behave within the fuel in order to predict the performance of the fuel under operating conditions. Fission gas redistribution within the fuel is governed by mass transport and the presence of sinks such as impurities, dislocations, and grain boundaries. Thus, to understand how the distribution of fission gases evolves in the fuel, we must understand the underlying transport mechanisms, tied to the concentrations and mobilities of defects within the material, and how these gases interact with microstructural features that might act as sinks. Both of these issues have been addressed in previous work under NEAMS. However, once a fission product has reached a sink, such as a grain boundary, its mobility may be different there than in the grain interior and predicting how, for example, bubbles nucleate within grain boundaries necessitates an understanding of how fission gases diffuse within boundaries. That is the goal of the present work. In this report, we describe atomic level simulations of uranium vacancy diffusion in the pressence of a {Sigma}5 symmetric tilt boundary in urania (UO{sub 2}). This boundary was chosen as it is the simplest of the boundaries we considered in previous work on segregation and serves as a starting point for understanding defect mobility at boundaries. We use a combination of molecular statics calculations and kinetic Monte Carlo (kMC) to determine how the mobility of uranium vacancies is

  6. Small Business Innovation Research: Abstracts of Phase 1 awards, 1994

    SciTech Connect (OSTI)

    Not Available

    1994-12-31

    The Small Business Innovation Research (SBIR) program enables DOE to obtain effective, innovative solutions to important problems through the private sector, which has a commercial incentive to pursue the resulting technology and bring it to the marketplace. The growing number of awardees, many of them started in business in response to SBIR solicitations, is becoming a significant resource for the solution of high risk, high technology problems for the Department. As detailed here, this publication describes the technical efforts for SBIR Phase 1 awards in 1994. It is intended for the educated layman, and may be of particular interest to potential investors who wish to get in on the ground floor of exciting opportunities. Contained in this booklet are abstracts of the Phase 1 awards made in FY 1994 under the DOE SBIR program. The 212 Phase 1 projects described here were selected in a highly competitive process from a total of 2,276 grant applications received in response to the 1994 DOE annual SBIR Solicitation. The selections for awards were made on scientific and technical merit, as judged against the specific criteria listed in the Solicitation. Conclusions were reached on the basis of detailed reports returned by reviewers drawn from DOE laboratories, universities, private industry, and government. (Any discrepancies noted in prior DOE releases naming the firms selected for awards are due either to the firm changing its name after the award selection or to the firm not proceeding to a signed grant.) It is expected that between one-third and one-half of the Phase 1 projects will be continued into Phase 2. The work described in the abstracts is novel, high-risk research, but the benefits will also be potentially high if the objectives are met. Brief comments on the potential applications are given after each abstract. Individuals and organizations with an interest in the research described are encouraged to contact the appropriate small business directly.

  7. Abstracted publications related to the Hanford environment, 1980 to 1988

    SciTech Connect (OSTI)

    Becker, C.D.; Gray, R.H.

    1989-05-01

    This abstracted bibliography provides a reference to the diverse environmental activities conducted on the Hanford Site from 1980 through 1988. It includes 500 reports and articles that were prepared largely by onsite contractors and the Department of Energy. Documents contained here were separated into eight subject areas: air and atmosphere, aquatic ecology, effluents and wastes, geology and hydrology, Hanford Site, radioactivity, terrestrial ecology, and socioeconomics. These areas form the basis of a key word index, which is intended to help the reader locate subjects of interest. An author index is also included.

  8. Third conference on radiation protection and dosimetry. Program and abstracts

    SciTech Connect (OSTI)

    Not Available

    1991-12-31

    This conference has been designed with the objectives of promoting communication among applied, research, regulatory, and standards personnel involved in radiation protection and providing them with sufficient information to evaluate their programs. To partly fulfill these objectives, a technical program consisting of more than 75 invited and contributed oral presentations encompassing all aspects of radiation protection has been prepared. General topics include external dosimetry, internal dosimetry, instruments, regulations and standards, accreditation and test programs, research advances, and applied program experience. This publication provides a summary of the technical program and a collection of abstracts of the oral presentations.

  9. Second SIAM conference on sparse matrices: Abstracts. Final technical report

    SciTech Connect (OSTI)

    1996-12-31

    This report contains abstracts on the following topics: invited and long presentations (IP1 & LP1); sparse matrix reordering & graph theory I; sparse matrix tools & environments I; eigenvalue computations I; iterative methods & acceleration techniques I; applications I; parallel algorithms I; sparse matrix reordering & graphy theory II; sparse matrix tool & environments II; least squares & optimization I; iterative methods & acceleration techniques II; applications II; eigenvalue computations II; least squares & optimization II; parallel algorithms II; sparse direct methods; iterative methods & acceleration techniques III; eigenvalue computations III; and sparse matrix reordering & graph theory III.

  10. ASC 84: applied superconductivity conference. Final program and abstracts

    SciTech Connect (OSTI)

    Not Available

    1984-01-01

    Abstracts are given of presentations covering: superconducting device fabrication; applications of rf superconductivity; conductor stability and losses; detectors and signal processing; fusion magnets; A15 and Nb-Ti conductors; stability, losses, and various conductors; SQUID applications; new applications of superconductivity; advanced conductor materials; high energy physics applications of superconductivity; electronic materials and characterization; general superconducting electronics; ac machinery and new applications; digital devices; fusion and other large scale applications; in-situ and powder process conductors; ac applications; synthesis, properties, and characterization of conductors; superconducting microelectronics. (LEW)

  11. Microsoft Word - CYCLOTRON_2011_ABSTRACT_REPET_nica

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Draw a Level Scheme? Dr. N. Nica Cyclotron Institute TAMU Cyclotron Institute, Texas A&M University, College Station, Texas 77843, USA Abstract Drawing a level scheme is a procedure of figuring the levels and decaying transitions of an excited nucleus, which nowadays is a well- known, rather technical procedure. In a previous talk we showed that some extra correlations exist in the gamma-ray coincidence spectra which we were able to sample in the decay of high-spin states of several nuclei

  12. A FALSE POSITIVE FOR OCEAN GLINT ON EXOPLANETS: THE LATITUDE-ALBEDO EFFECT

    SciTech Connect (OSTI)

    Cowan, Nicolas B. [Center for Interdisciplinary Exploration and Research in Astrophysics and Department of Physics and Astronomy, Northwestern University, 2131 Tech Drive, Evanston, IL 60208 (United States); Abbot, Dorian S. [Department of Geophysical Sciences, University of Chicago, 5734 South Ellis Avenue, Chicago, IL 60637 (United States); Voigt, Aiko [Max Planck Institute for Meteorology, Bundesstr. 53, D-20146, Hamburg (Germany)

    2012-06-10

    Identifying liquid water on the surface of planets is a high priority, as this traditionally defines habitability. One proposed signature of oceans is specular reflection ('glint'), which increases the apparent albedo of a planet at crescent phases. We post-process a global climate model of an Earth-like planet to simulate reflected light curves. Significantly, we obtain glint-like phase variations even though we do not include specular reflection in our model. This false positive is the product of two generic properties: (1) for modest obliquities, a planet's poles receive less orbit-averaged stellar flux than its equator, so the poles are more likely to be covered in highly reflective snow and ice; and (2) we show that reflected light from a modest-obliquity planet at crescent phases probes higher latitudes than at gibbous phases, therefore a planet's apparent albedo will naturally increase at crescent phase. We suggest that this 'latitude-albedo effect' will operate even for large obliquities: in that case the equator receives less orbit-averaged flux than the poles, and the equator is preferentially sampled at crescent phase. Using rotational and orbital color variations to map the surfaces of directly imaged planets and estimate their obliquity will therefore be a necessary pre-condition for properly interpreting their reflected phase variations. The latitude-albedo effect is a particularly convincing glint false positive for zero-obliquity planets, and such worlds are not amenable to latitudinal mapping. This effect severely limits the utility of specular reflection for detecting oceans on exoplanets.

  13. Sedimentation and reservoir distribution related to a tilted block system in the Sardinia Oligocene-Miocene rift (Italy)

    SciTech Connect (OSTI)

    Tremolieres, P.; Cherchi, A.; Eschard, R.; De Graciansky, P.C.; Montadert, L.

    1988-08-01

    In the western Mediterranean basin lies a rift system about 250 km long and 50 km wide and its infilling outcrop (central Sardinia). Seismic reflection surveys show its offshore extension. Block tilting started during the late Oligocene and lasted during Aquitanian-early Burdigalian time. Two main fault trends, with synthetic and antithetic throws, define the more-or-less collapsed blocks. This morphology guided the transit and trapping of sediments. The sedimentation started in a continental environment then, since the Chattian, in marine conditions. In the central part, the series can reach a thickness of 2,000 m. The basement composition and the volcanics products related to the main fault motion controlled the nature of the synrift deposits. According to their location in the rift context, the tilted blocks trap either continental deposits or marine siliciclastic or carbonate deposits. In the deeper part of the graben, sands were redeposited by gravity flows into the basinal marls. The younger prerift deposits are from Eocene to early Oligocene age and locally comprise thick coal layers. Postrift deposits, mainly marls, sealed the blocks and synrift sedimentary bodies. In middle and late Miocene time some faults were reactivated during compressional events. Then, a quaternary extensional phase created the Campidano graben, filled with about 1,000 m of sediments superimposed on the Oligocene-Miocene rift.

  14. 15. international conference on plant growth substances: Program -- Abstracts

    SciTech Connect (OSTI)

    1995-12-31

    Since the 14th Conference in Amsterdam in 1991, progress in plant hormone research and developmental plant biology has been truly astonishing. The five ``classical`` plant hormones, auxin, gibberellin, cytokinin, ethylene, and abscisic acid, have been joined by a number of new signal molecules, e.g., systemin, jasmonic acid, salicylic acid, whose biosynthesis and functions are being understood in ever greater detail. Molecular genetics has opened new vistas in an understanding of transduction pathways that regulate developmental processes in response to hormonal and environmental signals. The program of the 15th Conference includes accounts of this progress and brings together scientists whose work focuses on physiological, biochemical, and chemical aspects of plant growth regulation. This volume contains the abstracts of papers presented at this conference.

  15. Laboratory technology research: Abstracts of FY 1998 projects

    SciTech Connect (OSTI)

    1998-11-01

    The Laboratory Technology Research (LTR) program supports high-risk, multidisciplinary research partnerships to investigate challenging scientific problems whose solutions have promising commercial potential. These partnerships capitalize on two great strengths of the country: the world-class basic research capability of the DOE Office of Science (SC) national laboratories and the unparalleled entrepreneurial spirit of American industry. Projects supported by the LTR program in FY 1998 explore the applications of basic research advances relevant to DOE`s mission over a full range of scientific disciplines. The program presently emphasizes three critical areas of mission-related research: advanced materials, intelligent processing and manufacturing research, and environmental and biomedical research. Abstracts for 85 projects are contained in this report.

  16. Selected translated abstracts of Russian-language climate-change publications. 4: General circulation models

    SciTech Connect (OSTI)

    Burtis, M.D.; Razuvaev, V.N.; Sivachok, S.G.

    1996-10-01

    This report presents English-translated abstracts of important Russian-language literature concerning general circulation models as they relate to climate change. Into addition to the bibliographic citations and abstracts translated into English, this report presents the original citations and abstracts in Russian. Author and title indexes are included to assist the reader in locating abstracts of particular interest.

  17. Selected translated abstracts of Russian-language climate-change publications: I, Surface energy budget

    SciTech Connect (OSTI)

    Burtis, M.D.

    1992-09-01

    This report presents abstracts (translated into English) of important Russian-language literature concerning the surface energy budget as it relates to climate change. In addition to the bibliographic citations and abstracts translated into English, this report presents the original citations and abstracts in Russian. Author and title indexes are included, to assist the reader in locating abstracts of particular interest.

  18. 11th Topical conference high-temperature plasma diagnostics. Book of abstracts

    SciTech Connect (OSTI)

    1996-06-01

    This report contains abstracts from the 11th topical conference on high-temperature plasma diagnostics.

  19. Selected Translated Abstracts of Russian-Language Climate-Change Publications, I. Surface Energy Budget

    SciTech Connect (OSTI)

    Ravina, C.B.

    1992-01-01

    This report presents abstracts (translated into English) of important Russian-language literature concerning the surface energy budget as it relates to climate change. In addition to the bibliographic citations and abstracts translated into English, this report presents the original citations and abstracts in Russian. Author and title indexes are included, to assist the reader in locating abstracts of particular interest.

  20. Selected translated abstracts of Russian-language climate-change publications: II, Clouds. Issue 159

    SciTech Connect (OSTI)

    Burtis, M.D.

    1994-01-01

    This report presents abstracts (translated into English) of important Russian-language literature concerning clouds as they relate to climate change. In addition to the bibliographic citations and abstracts translated into English, this report presents the original citations and abstracts in Russian. Author and title indexes are included to assist the reader in locating abstracts of particular interest.

  1. Selected Translated Abstracts of Russian-Language Climate-Change Publications, II. Clouds

    SciTech Connect (OSTI)

    Ravina, C.B.

    1994-01-01

    This report presents abstracts (translated into English) of important Russian-language literature concerning clouds as they relate to climate change. In addition to the bibliographic citations and abstracts translated into English, this report presents the original citations and abstracts in Russian. Author and title indexes are included, to assist the reader in locating abstracts of particular interest.

  2. Latitude survey investigation of galactic cosmic ray solar modulation during 1994-2007

    SciTech Connect (OSTI)

    Nuntiyakul, W.; Ruffolo, D.; Siz, A.; Evenson, P.; Bieber, J. W.; Clem, J.; Pyle, R.; Duldig, M. L.; Humble, J. E. E-mail: david.ruf@mahidol.ac.th E-mail: evenson@udel.edu E-mail: clem@bartol.udel.edu E-mail: John.Humble@utas.edu.au

    2014-11-01

    The Galactic cosmic ray spectrum exhibits subtle variations over the 22 yr solar magnetic cycle in addition to the more dramatic variations over the 11 yr sunspot cycle. Neutron monitors are large ground-based detectors that provide accurate measurements of variations in the cosmic ray flux at the top of the atmosphere above the detector. At any given location the magnetic field of the Earth excludes particles below a well-defined rigidity (momentum per unit charge) known as the cutoff rigidity, which can be accurately calculated using detailed models of the geomagnetic field. By carrying a neutron monitor to different locations, e.g., on a ship, the Earth itself serves as a magnet spectrometer. By repeating such latitude surveys with identical equipment, a sensitive measurement of changes in the spectrum can be made. In this work, we analyze data from the 1994 through 2007 series of latitude surveys conducted by the Bartol Research Institute, the University of Tasmania, and the Australian Antarctic Division. We confirm the curious 'crossover' in spectra measured near solar minima during epochs of opposite solar magnetic polarity, and show that it is directly related to a sudden change in the spectral behavior of solar modulation at the time of the polarity reversal, as revealed from contemporaneous variations in the survey data and a fixed station. We suggest that the spectral change and crossover result from the interaction of effects due to gradient/curvature drifts with a systematic change in the interplanetary diffusion coefficient caused by turbulent magnetic helicity.

  3. Reconciliation of local and long range tilt correlations in underdoped La??xBaxCuO? (0 ? x ? 0.155)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bozin, Emil S.; Zhong, Ruidan; Knox, Kevin R.; Gu, Genda; Hill, John P.; Tranquada, John M.; Billinge, Simon J. L.

    2015-02-26

    A long standing puzzle regarding the disparity of local and long range CuO? octahedral tilt correlations in the underdoped regime of La??xBaxCuO? is addressed by utilizing complementary neutron powder diffraction and inelastic neutron scattering (INS) approaches. Long-range and static CuO? tilt order with orthogonally inequivalent Cu-O bonds in the CuO? planes in the low temperature tetragonal (LTT) phase is succeeded on warming through the low-temperature transition by one with orthogonally equivalent bonds in the low temperature orthorhombic (LTO) phase. In contrast, the signatures of LTT-type tilts in the instantaneous local atomic structure persist on heating throughout the LTO crystallographic phasemoreon the nanoscale, although becoming weaker as temperature increases. Analysis of the INS spectra for the x = 1/8 composition reveals the dynamic nature of the LTT-like tilt fluctuations within the LTO phase and their 3D character. The doping dependence of relevant structural parameters indicates that the magnitude of the Cu-O bond anisotropy has a maximum at x = 1/8 doping where bulk superconductivity is most strongly suppressed, suggesting that the structural anisotropy might be influenced by electron-phonon coupling and the particular stability of the stripe-ordered phase at this composition. The bond-length modulation that pins stripe order is found to be remarkably subtle, with no anomalous bond length disorder at low temperature, placing an upper limit on any in-plane Cu-O bondlength anisotropy. The results further reveal that although appreciable octahedral tilts persist through the high-temperature transition and into the high temperature tetragonal (HTT) phase, there is no significant preference between different tilt directions in the HTT regime. This study also exemplifies the importance of a systematic approach using complementary techniques when investigating systems exhibiting a large degree of complexity and subtle structural responses.less

  4. Reconciliation of local and long-range tilt correlations in underdoped La2-xBaxCuO4(0 ≤ x ≤ 0.155)

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bozin, Emil S.; Zhong, Ruidan; Knox, Kevin R.; Gu, Genda; Hill, John P.; Tranquada, John M.; Billinge, Simon J. L.

    2015-02-26

    A long standing puzzle regarding the disparity of local and long range CuO₆ octahedral tilt correlations in the underdoped regime of La₂₋xBaxCuO₄ is addressed by utilizing complementary neutron powder diffraction and inelastic neutron scattering (INS) approaches. Long-range and static CuO₆ tilt order with orthogonally inequivalent Cu-O bonds in the CuO₂ planes in the low temperature tetragonal (LTT) phase is succeeded on warming through the low-temperature transition by one with orthogonally equivalent bonds in the low temperature orthorhombic (LTO) phase. In contrast, the signatures of LTT-type tilts in the instantaneous local atomic structure persist on heating throughout the LTO crystallographic phasemore » on the nanoscale, although becoming weaker as temperature increases. Analysis of the INS spectra for the x = 1/8 composition reveals the dynamic nature of the LTT-like tilt fluctuations within the LTO phase and their 3D character. The doping dependence of relevant structural parameters indicates that the magnitude of the Cu-O bond anisotropy has a maximum at x = 1/8 doping where bulk superconductivity is most strongly suppressed, suggesting that the structural anisotropy might be influenced by electron-phonon coupling and the particular stability of the stripe-ordered phase at this composition. The bond-length modulation that pins stripe order is found to be remarkably subtle, with no anomalous bond length disorder at low temperature, placing an upper limit on any in-plane Cu-O bondlength anisotropy. The results further reveal that although appreciable octahedral tilts persist through the high-temperature transition and into the high temperature tetragonal (HTT) phase, there is no significant preference between different tilt directions in the HTT regime. As a result, this study also exemplifies the importance of a systematic approach using complementary techniques when investigating systems exhibiting a large degree of complexity and subtle

  5. Symmetries of migration related segments of all [001] coincidence site lattice tilt boundaries in (001) projections for all holohedral cubic materials

    SciTech Connect (OSTI)

    Moeck, Peter; York, Bryant W.; Browning, Nigel D.

    2014-09-11

    Utilizing bicrystallography in two dimensions (2D), the symmetries of migration related segments of Coincidence Site Lattice (CSL) boundaries are derived for projections along their [001] tilt axis in grain boundaries of crystalline materials that possess the holohedral point symmetry of the cubic system (i.e. m3m). These kinds of “edge-on” projections are typical for atomic resolution imaging of such tilt boundaries with Transmission Electron Microscopes (TEM). This fact facilitates the visual confirmation of our predictions by recently published Zcontrast scanning TEM investigations [H. Yang et al., Phil. Mag. 93 (2013) 1219] and many other TEM studies.

  6. Unit-cell thick BaTiO{sub 3} blocks octahedral tilt propagation across oxide heterointerface

    SciTech Connect (OSTI)

    Kan, Daisuke Aso, Ryotaro; Kurata, Hiroki; Shimakawa, Yuichi

    2014-05-14

    We fabricated SrRuO{sub 3}/BaTiO{sub 3}/GdScO{sub 3} heterostructures in which the BaTiO{sub 3} layer is one unit cell thick by pulsed laser deposition and elucidated how the BaTiO{sub 3} layer influences structural and magneto-transport properties of the SrRuO{sub 3} layer through octahedral connections across the heterointerface. Our X-ray-diffraction-based structural characterizations show that while an epitaxial SrRuO{sub 3} layer grown directly on a GdScO{sub 3} substrate is in the monoclinic phase with RuO{sub 6} octahedral tilts, a one-unit-cell-thick BaTiO{sub 3} layer inserted between SrRuO{sub 3} and GdScO{sub 3} stabilizes the tetragonal SrRuO{sub 3} layer with largely reduced RuO{sub 6} tilts. Our high-angle annular dark-field and annular bright-field scanning transmission electron microscopy observations provide an atomic-level view of the octahedral connections across the heterostructure and reveal that the BaTiO{sub 3} layer only one unit cell thick is thick enough to stabilize the RuO{sub 6}-TiO{sub 6} octahedral connections with negligible in-plane oxygen atomic displacements. This results in no octahedral tilts propagating into the SrRuO{sub 3} layer and leads to the formation of a tetragonal SrRuO{sub 3} layer. The magneto-transport property characterizations also reveal a strong impact of the octahedral connections modified by the inserted BaTiO{sub 3} layer on the spin-orbit interaction of the SrRuO{sub 3} layer. The SrRuO{sub 3} layer on BaTiO{sub 3}/ GdScO{sub 3} has in-plane magnetic anisotropy. This is in contrast to the magnetic anisotropy of the monoclinic SrRuO{sub 3} films on the GdScO{sub 3} substrate, in which the easy axis is ?45 to the film surface normal. Our results demonstrate that the one-unit-cell-thick layer of BaTiO{sub 3} can control and manipulate the interfacial octahedral connection closely linked to the structure-property relationship of heterostructures.

  7. Abstracts of Phase 1 awards, (fiscal year) 1987

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    Contained in this booklet are abstracts of the Phase I awards made in Fiscal Year 1987 under the Small Business Innovation Research (SBIR) program in the Department of Energy (DOE). The program is designed for implementation in a three-phase process, with Phase I determining the scientific or technical merit and feasibility of ideas proposed for investigation. The period of performance in this initial phase is relatively brief, typically about 6 months, and the awards are limited to $50,000. Phase II is the principal research or research and development effort, and the awards are as high as $500,000 for work to be performed in periods of up to 2 years. Phase III is the commercial application. The 111 Phase I projects described were selected in a highly competitive process from a total of 942 proposals received in response to the 1987 Solicitation. They cover the fields of chemistry, materials, control systems, plant natural products, instrumentation, nuclear medicine, health and environmental effects, high energy physics, particle accelerators, nuclear physics, plasma diagnostics and confinement, fusion energy systems, robotics and remote systems, nuclear reactors, space nuclear power, fuel cycle, decontamination/decommissioning, commputers in nuclear plants, coal, enhanced oil recovery/tar sands, fossil energy, photovoltaics, solar thermal, ceramics for heat engines, and industrial separation, conversion and recovery processes. (DLC)

  8. 4th Annual DOE-ERSP PI Meeting: Abstracts

    SciTech Connect (OSTI)

    Hazen, Terry C.

    2009-03-01

    This contains abstracts from the 2009 Annual Environmental Remediation Sciences Program (ERSP) Principal Investigators (PI) Meeting. The ERSP seeks to advance fundamental science to understand, predict, and mitigate the impacts of environmental contamination from past nuclear weapons production and provide a scientific basis for the long-term stewardship of nuclear waste disposal. These ambitious goals cannot be achieved by any one project alone. Therefore, ERSP funds a combination of research programs at the DOE national laboratories, individual projects at universities and federal agencies, and large long(er)-term field site research. Integration of these activities to advance the ERSP goals is a constant challenge, but made significantly simpler by bringing together all funded ERSP researchers once a year to discuss the very latest research results. It is at these meetings where new ideas and/or scientific advancements in support of ERSP goals can be discussed and openly debated among all PIs in the program. The ERSP thrives, in part, on the new ideas, concepts, scientific connections, and collaborations generated as a result of these meetings. The annual PI Meeting is very much a working meeting with three major goals: (1) to provide opportunities for scientific interaction among the ERSP scientists, a critical element for the program; (2) to provide the ERSP program staff with an opportunity to evaluate the progress of each program and project; and (3) to showcase the ERSP to interested parties within DOE and within other federal agencies In addition to program managers from within OBER, there will be representatives from other offices within DOE and other federal agencies in attandance at the meeting.

  9. THE HIGH-LATITUDE BRANCH OF THE SOLAR TORSIONAL OSCILLATION IN THE RISING PHASE OF CYCLE 24

    SciTech Connect (OSTI)

    Howe, R.; Christensen-Dalsgaard, J.; Hill, F.; Komm, R.; Larson, T. P.; Schou, J.; Rempel, M.; Thompson, M. J.

    2013-04-10

    We use global heliseismic data from the Global Oscillation Network Group, the Michelson Doppler Imager on board the Solar and Heliospheric Observatory, and the Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory, to examine the behavior, during the rising phase of Solar Cycle 24, of the migrating zonal flow pattern known as the torsional oscillation. Although the high-latitude part of the pattern appears to be absent in the new cycle when the flows are derived by subtracting a mean across a full solar cycle, it can be seen if we subtract the mean over a shorter period in the rising phase of each cycle, and these two mean rotation profiles differ significantly at high latitudes. This indicates that the underlying high-latitude rotation has changed; we speculate that this is in response to weaker polar fields, as suggested by a recent model.

  10. Quaternary sedimentation and diagenesis in a high-latitude reef, Houtman Abrolhos Islands, Western Australia

    SciTech Connect (OSTI)

    Rosen, M.R.; Collins, L.B. (Curtin Univ. of Technology, Perth, Western Australia (Australia)); Wyrwoll, K.H.; Hatcher, B.G. (Univ. of Western Australia, Perth (Australia))

    1990-05-01

    The Houtman Abrolhos reefs are located 80 km off the west coast of Australia between latitudes 28 and 29{degree} south. The islands are situated on three Pleistocene carbonate reef platforms which rise above the surrounding shelf. The modern coral reefs are close to the geographic limit for coral growth in the southern hemisphere and survive due to the presence of the Leeuwin current (a poleward-flowing warm stream). Two major shallow-water benthic communities coexist in the Abrolhos: a macroalgal-dominated community on the windward platform margins and a coral-dominated community on the leeward margins. These communities overlap-particularly in the platform lagoons, where competition between macroalgae and corals is intense. This interaction has been suggested as a major factor controlling the growth of cord reefs at high latitudes. The Holocene carbonate sediments lack nonskeletal components and are dominated by coral and coralline algal fragments with subordinate molluskan and echinoderm debris. The accumulations can be grouped into the following major facies: (1) coral framestone and coralline algal/serpulid boundstone, (2) submarine sand sheets, (3) subaerial coral storm ridges, (4-) peritidal to subtidal shingle and rubble veneers composed of dominantly coral debris, and (5) eolian dunes and beach sand. The Holocene sediment is a thin (< 2 m) veneer on the Pleistocene reef platform, which is emergent as small islands. The Pleistocene platform is composed of reef facies that can be directly related to the Holocene sediments. The platform is composed of framestone and boundstone facies (corals and coralline algal/serpulid facies), rudstones (submarine coral rubble facies), planar-bedded skeletal grainstones dipping 12-13{degree} (submarine sand sheet and peritidal shingle facies), and large 15-m-high eolianite dunes (eolian dune facies).

  11. 2nd Annual DOE-ERSP PI Meeting: Abstracts

    SciTech Connect (OSTI)

    Hazen, Terry C.

    2007-03-14

    and allows ample time for informal group discussions and poster presentations. The intent of this format is to foster informal discussion of research among PIs and ERSD program managers-discussion that is a hallmark of previous ERSD-sponsored meetings. Morning sessions will be dominated by oral presentations from PIs chosen by ERSD program managers to communicate key topics of research within the program. There is ample time during lunch and in the early afternoon for small group discussions/meetings prior to convening again in the later afternoon for oral presentations on field research conducted at the Integrated Field-Scale Subsurface Research Challenge sites (IFCs). Formal poster sessions begin after dinner. Abstracts for all poster presentations are listed within this meeting booklet. On behalf of the ERSD program managers and staff, we thank you for attending this year's PI meeting. We look forward to discussing the results of your research with you and your ideas for the future, and we hope that this meeting will continue as an important tradition for PIs in the program and serve as a valuable resource for your investigations.

  12. Towards an Abstraction-Friendly Programming Model for High Productivity and High Performance Computing

    SciTech Connect (OSTI)

    Liao, C; Quinlan, D; Panas, T

    2009-10-06

    General purpose languages, such as C++, permit the construction of various high level abstractions to hide redundant, low level details and accelerate programming productivity. Example abstractions include functions, data structures, classes, templates and so on. However, the use of abstractions significantly impedes static code analyses and optimizations, including parallelization, applied to the abstractions complex implementations. As a result, there is a common perception that performance is inversely proportional to the level of abstraction. On the other hand, programming large scale, possibly heterogeneous high-performance computing systems is notoriously difficult and programmers are less likely to abandon the help from high level abstractions when solving real-world, complex problems. Therefore, the need for programming models balancing both programming productivity and execution performance has reached a new level of criticality. We are exploring a novel abstraction-friendly programming model in order to support high productivity and high performance computing. We believe that standard or domain-specific semantics associated with high level abstractions can be exploited to aid compiler analyses and optimizations, thus helping achieving high performance without losing high productivity. We encode representative abstractions and their useful semantics into an abstraction specification file. In the meantime, an accessible, source-to-source compiler infrastructure (the ROSE compiler) is used to facilitate recognizing high level abstractions and utilizing their semantics for more optimization opportunities. Our initial work has shown that recognizing abstractions and knowing their semantics within a compiler can dramatically extend the applicability of existing optimizations, including automatic parallelization. Moreover, a new set of optimizations have become possible within an abstraction-friendly and semantics-aware programming model. In the future, we will

  13. Proceedings of the international conference on nuclear physics, August 24-30, 1980, Berkeley, California. Volume 1. Abstracts. [Berkeley, California, August 24-30, 1980 (abstracts only)

    SciTech Connect (OSTI)

    Not Available

    1980-01-01

    This volume contains all abstracts (931) received by the conference organizers before June 20, 1980. The abstracts are grouped according to the following topics: nucleon-nucleon interactions, free and in nuclei; distribution of matter, charge, and magnetism; exotic nuclei and exotic probes; giant resonances and other high-lying excitations; applications of nuclear science; nuclei with large angular momentum and deformation; heavy-ion reactions and relaxation phenomena; new techniques and instruments; pion absorption and scattering by nuclei; and miscellaneous. Some of these one-page abstracts contain data. A complete author index is provided. (RWR)

  14. Fermi Large Area Telescope Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes

    SciTech Connect (OSTI)

    Abdo, A.A.; Ackermann, M.; Ajello, M.; Anderson, B.; Atwood, W.B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Baughman, B.M.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Blandford, R.D.; Bloom, E.D.; Bonamente, E.; Borgland, A.W.; Bregeon, J.; Brez, A.; Brigida, M.; /more authors..

    2012-04-11

    The diffuse galactic {gamma}-ray emission is produced by cosmic rays (CRs) interacting with the interstellar gas and radiation field. Measurements by the Energetic Gamma-Ray Experiment Telescope (EGRET) instrument on the Compton Gamma-Ray Observatory indicated excess {gamma}-ray emission {ge}1 GeV relative to diffuse galactic {gamma}-ray emission models consistent with directly measured CR spectra (the so-called 'EGRET GeV excess'). The Large Area Telescope (LAT) instrument on the Fermi Gamma-Ray Space Telescope has measured the diffuse {gamma}-ray emission with improved sensitivity and resolution compared to EGRET. We report on LAT measurements for energies 100 MeV to 10 GeV and galactic latitudes 10{sup o} {le} |b| {le} 20{sup o}. The LAT spectrum for this region of the sky is well reproduced by a diffuse galactic {gamma}-ray emission model that is consistent with local CR spectra and inconsistent with the EGRET GeV excess.

  15. Is the northern high latitude land-based CO2 sink weakening?

    SciTech Connect (OSTI)

    Mcguire, David; Kicklighter, David W.; Gurney, Kevin R; Burnside, Todd; Melillo, Jerry

    2011-01-01

    Studies indicate that, historically, terrestrial ecosystems of the northern high latitude region may have been responsible for up to 60% of the global net land-based sink for atmospheric CO2. However, these regions have recently experienced remarkable modification of the major driving forces of the carbon cycle, including surface air temperature warming that is significantly greater than the global average and associated increases in the frequency and severity of disturbances. Whether arctic tundra and boreal forest ecosystems will continue to sequester atmospheric CO2 in the face of these dramatic changes is unknown. Here we show the results of model simulations that estimate a 41 Tg C yr-1 sink in the boreal land regions from 1997 to 2006, which represents a 73% reduction in the strength of the sink estimated for previous decades in the late 20th Century. Our results suggest that CO2 uptake by the region in previous decades may not be as strong as previously estimated. The recent decline in sink strength is the combined result of 1) weakening sinks due to warming-induced increases in soil organic matter decomposition and 2) strengthening sources from pyrogenic CO2 emissions as a result of the substantial area of boreal forest burned in wildfires across the region in recent years. Such changes create positive feedbacks to the climate system that accelerate global warming, putting further pressure on emission reductions to achieve atmospheric stabilization targets.

  16. Study of mid-latitude 5577A CI dayglow emissions. Doctoral thesis

    SciTech Connect (OSTI)

    Hume, E.E.

    1992-01-01

    Summary of thesis: The green line (5577angstroms) is a bright, persistent component of the visible airglow. It is produced by an electric quadruple transition from the metastable second excited state (1So) to the first excited state (1D2) of atomic oxygen. These two excited states all lie in the same electron shell of the atom and have the same electron configuration as the ground state of 1s22s22p4, which is the 3P2,1,0. This emission is present in both the daytime and night airglow and in the aurora, and despite a long history of study it is still not fully understood. The emission in the dayglow and the nightglow is relatively homogeneous spatially and global in coverage. In the aurora, the emission is much brighter than the airglow, high structured and very localized being restricted to higher latitudes. The structure of the 5577angstroms emission with altitude and the chemistry responsible for the production of the emission are complex. The vertical structure for the emission has two distinct layers in the airglow each with its own set of production and loss mechanisms. the chemistry for either of these layers is not completely known. The auroral emission is not understood either since it overlaps the upper and lower layer altitudes and it tends to contain some parts of the chemistry of both layers as sources and losses.

  17. Generation of short gamma-ray pulses on electron bunches formed in intense interfering laser beams with tilted fronts

    SciTech Connect (OSTI)

    Korobkin, V V; Romanovskiy, M Yu; Trofimov, V A; Shiryaev, O B

    2014-05-30

    It is shown that in the interference of multiple laser pulses with a relativistic intensity, phase and amplitude fronts of which are tilted at an angle with respect to their wave vector, effective traps of charged particles, which are moving at the velocity of light, are formed. Such traps are capable of capturing and accelerating the electrons produced in the ionisation of low-density gas by means of laser radiation. The accelerated electrons in the traps form a bunch, whose dimensions in all directions are much smaller than the laser radiation wavelength. Calculations show that the energy of accelerated electrons may amount to several hundred GeV at experimentally accessible relativistic laser intensities. As a result of the inverse Compton scattering, gamma-quanta with a high energy and narrow radiation pattern are emitted when these electrons interact with a laser pulse propagating from the opposite direction. The duration of emitted gamma-ray pulses constitutes a few attoseconds. The simulation is performed by solving the relativistic equation of motion for an electron with a relevant Lorentz force. (interaction of radiation with matter)

  18. Magnetic rotation (MR) band crossing in N=78 odd-Z nuclei: Tilted axis cranking (TAC) calculations to explore the role of nucleons

    SciTech Connect (OSTI)

    Kumar, Suresh

    2014-08-14

    Magnetic Rotation (MR) band crossing is studied systematically in N=78 isotones (La, Pr, Pm and Eu) using Tilted Axis Cranking (TAC) model. The observables such as I(h) vs h?, excitation energy E(MeV) vs spin I(h), and the B(M1)/B(E2) vs I(h) were considered to pinpoint MR crossing in these nuclei. The results of tilted axis cranking were compared with these experimental observables. The B(M1) and B(E2) values were also reported and used to understand the crossing behaviour of these MR bands. The systematic evolution of this phenomenon in N=78 odd-Z istotones leads to understand the role of nucleons in MR band crossing.

  19. Strain Accommodation By Facile WO6 Octahedral Distortion and Tilting During WO3 Heteroepitaxy on SrTiO3(001)

    SciTech Connect (OSTI)

    Du, Yingge; Gu, Meng; Varga, Tamas; Wang, Chong M.; Bowden, Mark E.; Chambers, Scott A.

    2014-08-27

    In this paper, we show that compared to other BO6 octahedra in ABO3 structured perovskite oxides, the WO6 octahedra in tungsten trioxide (WO3) can withstand a much larger degree of distortion and tilting to accommodate interfacial strain, which in turn strongly impact the nucleation, structure, and defect formation during the epitaxial growth of WO3 on SrTiO3(001). A meta-stable tetragonal phase can be stabilized by epitaxy and a thickness dependent phase transition (tetragonal to monoclinic) is observed. In contrast to misfit dislocations to accommodate the interfacial stain, the facial WO6 octahedral distortion and tilting give rise to three types of planar defects that affect more than 15 monolayers from the interface. These atomically resolved, unusual interfacial defects may significantly alter the electronic, electrochromic, and mechanical properties of the epitaxial films.

  20. Reconciliation of local and long-range tilt correlations in underdoped La 2 x Ba x CuO 4 ( 0 ? x ? 0.155 )

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Bozin, Emil S.; Zhong, Ruidan; Knox, Kevin R.; Gu, Genda; Hill, John P.; Tranquada, John M.; Billinge, Simon J. L.

    2015-02-26

    A long-standing puzzle regarding the disparity of local and long-range CuO? octahedral tilt correlations in the underdoped regime of La2xBaxCuO? is addressed by utilizing complementary neutron powder diffraction and inelastic neutron scattering (INS) approaches. This system is of interest because of the strong depression of the bulk superconducting transition at x=1/8 in association with charge and spin stripe order. The latter unidirectional order is tied to Cu-O bond-length anisotropy present in the so-called low-temperature tetragonal (LTT) phase. On warming, the lattice exhibits two sequential structural transitions, involving changes in the CuO? tilt pattern, first to the low-temperature orthorhombic (LTO) andmorethen the high-temperature tetragonal (HTT) phase. Despite the changes in static order, inspection of the instantaneous local atomic structure suggests that the LTT-type tilts persist through the transitions. Analysis of the INS spectra for the x=1/8 composition reveals the dynamic nature of the LTT-like tilt fluctuations within the LTO and HTT phases. Within the low-temperature phase, the Cu-O bond-length splitting inferred from lattice symmetry and fitted atomic position parameters reaches a maximum of 0.3% at x=1/8, suggesting that electron-phonon coupling may contribute to optimizing the structure to stabilize stripe order. This splitting is much too small to be resolved in the pair distribution function, and in fact we do not resolve any enhancement of the instantaneous bond-length distribution in association with stripe order. This study exemplifies the importance of a systematic approach using complementary techniques when investigating systems exhibiting a large degree of complexity and subtle structural responses.less

  1. Aerosol optical depth derived from solar radiometry observations at northern mid-latitude sites

    SciTech Connect (OSTI)

    Laulainen, N.S.; Larson, N.R.; Michalsky, J.J.; Harrison, L.C.

    1994-01-01

    Routine, automated solar radiometry observations began with the development of the Mobile Automated Scanning Photometer (MASP) and its installation at the Rattlesnake Mountain Observatory (RMO). We have introduced a microprocessor controlled rotating shadowband radiometer (RSR), both the single detector and the multi-filter/detector (MFRSR) versions to replace the MASP. The operational mode of the RSRs is substantially different than the MASP or other traditional sun-tracking radiometers, because, by virtue of the automated rotating shadowband, the total and diffuse irradiance on a horizontal plane are measured and the direct-normal component deduced through computation from the total and diffuse components by the self-contained microprocessor. Because the three irradiance components are measured using the same detector for a given wavelength, the calibration coefficients are identical for each component, thus reducing errors when comparing them. The MFRSR is the primary radiometric instrument in the nine-station Quantitative Links Network (QLN) established in the eastern United States in late 1991. Data from this network are being used to investigate how cloud- and aerosol-induced radiative effects vary in time and with cloud structure and type over a mid-latitude continental region. This work supports the DOE Quantitative Links Program to quantify linkages between changes in atmospheric composition and climate forcing. In this paper we describe the setup of the QLN and present aerosol optical depth results from the on-going measurements at PNL/RMO, as well as preliminary results from the QLN. From the time-series of data at each site, we compare seasonal variability and geographical differences, as well as the effect of the perturbation to the stratosphere by Mt. Pinatubo. Analysis of the wavelength dependence of optical depth also provides information on the evolution and changes in the size distribution of the aerosols.

  2. Program and abstracts: IS-MPMI sixth International Symposium on Molecular Plant-Microbe Interactions

    SciTech Connect (OSTI)

    Not Available

    1992-12-31

    This volume provides abstracts of oral and poster presentations made for the Sixth International Symposium on Molecular Plant-Microbe Interactions.

  3. 2015 National Environmental Justice Conference and Training Program Call for Abstracts

    Broader source: Energy.gov [DOE]

    The 2015 National Environmental Justice Conference and Training Program planners are inviting individuals to submit abstracts, not to exceed two pages, related to environmental justice. Each...

  4. CALL FOR ABSTRACTS for the 2014 National Environmental Justice Conference and Training Program

    Broader source: Energy.gov [DOE]

    The 2014 National Environmental Justice Conference and Training Program planners are inviting individuals to submit abstracts, not to exceed two pages, related to environmental justice.

  5. Advanced light source: Compendium of user abstracts and technical reports,1993-1996

    SciTech Connect (OSTI)

    None, None

    1997-04-01

    This compendium contains abstracts written by users summarizing research completed or in progress from 1993-1996, ALS technical reports describing ongoing efforts related to improvement in machine operations and research and development projects, and information on ALS beamlines planned through 1998. Two tables of contents organize the user abstracts by beamline and by area of research, and an author index makes abstracts accessible by author and by principal investigator. Technical details for each beamline including whom to contact for additional information can be found in the beamline information section. Separate abstracts have been indexed into the database for contributions to this compendium.

  6. Generation of kinetic Alfven waves in the high-latitude near-Earth magnetotail: A global hybrid simulation

    SciTech Connect (OSTI)

    Guo, Zhifang; Hong, Minghua; Du, Aimin; Lin, Yu; Wang, Xueyi; Wu, Mingyu; Lu, Quanming

    2015-02-15

    In this paper, effects of a fast flow in the tail plasma sheet on the generation of kinetic Alfven waves (KAWs) in the high-latitude of the near-Earth magnetotail are investigated by performing a two-dimensional (2-D) global-scale hybrid simulation, where the plasma flow is initialized by the EB drift near the equatorial plane due to the existence of the dawn-dusk convection electric field. It is found that firstly, the plasma sheet becomes thinned and the dipolarization of magnetic field appears around (x,z)=(?10.5R{sub E},0.3R{sub E}), where R{sub E} is the radius of the Earth. Then, shear Alfven waves are excited in the plasma sheet, and the strong earthward flow is braked by the dipole-like magnetic field. These waves propagate along the magnetic field lines toward the polar regions later. Subsequently, KAWs with k{sub ?}?k{sub ?} are generated in the high-latitude magnetotail due to the existence of the non-uniformity of the magnetic field and density in the polar regions. The ratio of the electric field to the magnetic field in these waves is found to obey the relation (?E{sub z})/(?B{sub y}?)??/k{sub ?} of KAWs. Our simulation provides a mechanism for the generation of the observed low-frequency shear Alfven waves in the plasma sheet and kinetic Alfven waves in the high-latitude near-Earth magnetotail, whose source is suggested to be the flow braking in the low-latitude plasma sheet.

  7. Abstract As

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    The aerodynamic performance of various HAWT configurations was established using PROP for personal computers (Tangler,1987). The PROP family of codes is somewhat of an...

  8. Abstract Measurement

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... L K contains the kinetic terms, L Higgs contains the ... flavor eigenstates that enter these currents are not ... The MiniBooNE experiment was designed to search for to ...

  9. Regulatory and technical reports (abstract index journal). Compilation for third quarter 1997, July--September

    SciTech Connect (OSTI)

    Stevenson, L.L.

    1998-01-01

    This compilation consists of bibliographic data and abstracts for the formal regulatory and technical reports issued by the US Nuclear Regulatory Commission (NRC) Staff and its contractors. It is NRC`s intention to publish this compilation quarterly and to cumulate it annually. This report contains the third quarter 1997 abstracts.

  10. DIFFUSE GALACTIC LIGHT IN THE FIELD OF THE TRANSLUCENT HIGH GALACTIC LATITUDE CLOUD MBM32

    SciTech Connect (OSTI)

    Ienaka, N.; Kawara, K.; Matsuoka, Y.; Oyabu, S.; Sameshima, H.; Tsujimoto, T.; Peterson, B. A.

    2013-04-10

    We have conducted B-, g-, V-, and R-band imaging in a 45' Multiplication-Sign 40' field containing part of the high Galactic latitude translucent cloud MBM32, and correlated the intensity of diffuse optical light S{sub {nu}}({lambda}) with that of 100 {mu}m emission S{sub {nu}}(100 {mu}m). A {chi}{sup 2} minimum analysis is applied to fit a linear function to the measured correlation and derive the slope parameter b({lambda}) = {Delta}S{sub {nu}}({lambda})/{Delta}S{sub {nu}}(100 {mu}m) of the best-fit linear function. Compiling a sample by combining our b({lambda}) and published ones, we show that the b({lambda}) strength varies from cloud to cloud by a factor of four. Finding that b({lambda}) decreases as S{sub {nu}}(100 {mu}m) increases in the sample, we suggest that a nonlinear correlation including a quadratic term of S{sub {nu}}(100 {mu}m){sup 2} should be fitted to the measured correlation. The variation of optical depth, which is A{sub V} = 0.16-2.0 in the sample, can change b({lambda}) by a factor of 2-3. There would be some contribution to the large b({lambda}) variation from the forward-scattering characteristic of dust grains which is coupled to the non-isotropic interstellar radiation field (ISRF). Models of the scattering of diffuse Galactic light (DGL) underestimate the b({lambda}) values by a factor of two. This could be reconciled by deficiency in UV photons in the ISRF or by a moderate increase in dust albedo. Our b({lambda}) spectrum favors a contribution from extended red emission (ERE) to the diffuse optical light; b({lambda}) rises from B to V faster than the models, seems to peak around 6000 A and decreases toward long wavelengths. Such a characteristic is expected from the models in which the DGL is combined with ERE.