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Sample records for lca harmonization project

  1. Wind LCA Harmonization (Fact Sheet), NREL (National Renewable Energy Laboratory)

    SciTech Connect (OSTI)

    Not Available

    2013-06-01

    NREL recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that provides more exact estimates of GHG emissions for renewable and conventional generation, clarifying inconsistent and conflicting estimates in the published literature, and reducing uncertainty. This involved a systematic review and harmonization of life cycle assessment (LCA) literature of utility-scale wind power systems in order to determine the causes of life cycle greenhouse gases (GHG) emissions and, where possible, reduce variability in GHG estimates.

  2. Louisiana Coastal Area (LCA) Ecosystem Restoration, LA Six Conditionally Authorized Projects

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Louisiana Coastal Area (LCA) Ecosystem Restoration, LA Six Conditionally Authorized Projects 27 August 2010 Abstract: In 2004, USACE completed the Louisiana Coastal Area (LCA) Near-Term Report measures are needed to sustain coastal ecosystems, the LCA Near-Term Report was developed to identify cost

  3. LCA Harmonization

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsource History View NewGuam:onItronKanoshKetchikanKlondikeKunB SystemtechnikLoading...

  4. Background and Reflections on the Life Cycle Assessment Harmonization Project

    Broader source: Energy.gov [DOE]

    Despite the ever-growing body of life cycle assessment literature on electricity generation technologies, inconsistent methods and assumptions hamper comparison across studies and pooling of published results. Synthesis of the body of previous research is necessary to generate robust results to assess and compare environmental performance of different energy technologies for the benefit of policy makers, managers, investors, and citizens. With funding from the U.S. Department of Energy, the National Renewable Energy Laboratory initiated the LCA Harmonization Project in an effort to rigorously leverage the numerous individual studies to develop collective insights.

  5. Life Cycle Analysis for the Walter H. Gage Residence The life cycle analysis (LCA) being carried out for this project is one of thirteen

    E-Print Network [OSTI]

    The life cycle analysis (LCA) being carried out for this project is one of thirteen others that are being to the many uncertainties associated with carrying out LCA. Uncertainties and assumptions inherent this project is that the use of LCA on will most definitely be an important tool to be used for the future

  6. LCA Harmonization | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar2-0057-EAInvervar HydroElectric Cooperative(Redirected from Renewable

  7. Master / PhD Project Resonatorassisted high harmonic generation

    E-Print Network [OSTI]

    Hänsch, Theodor W.

    Master / PhD Project Resonatorassisted high harmonic generation with spatially tailored driving+ at low temperatures and on the generation and charac terization of an XUV frequency comb source suitable comb experiments: The XUV frequency comb is generated through extremely nonlinear conversion (high

  8. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Allard Hall LCA Study

    E-Print Network [OSTI]

    LCA Study CIVL 498C November 18, 2013 1065 1529 University of British Columbia Disclaimer: "UBC SEEDS ­ the UBC LCA Project ­ which aims to support the development of the field of life cycle assessment (LCA at rob.sianchuk@gmail.com #12;Allard Hall LCA Study Emma Brown CIVL 498C November 18, 2013 #12

  9. Harmonic tori in spheres and complex projective spaces F. E. Burstall

    E-Print Network [OSTI]

    Burstall, Fran E.

    Harmonic tori in spheres and complex projective spaces F. E. Burstall Introduction A map : M N of Riemannian manifolds is harmonic if it extremises the energy functional: |d|2 dvol on every compact subdomain of M. Harmonic maps arise in many different contexts in Geometry and Physics (for an overview, see [16

  10. Harmonic tori in spheres and complex projective spaces F. E. Burstall

    E-Print Network [OSTI]

    Bath, University of

    Harmonic tori in spheres and complex projective spaces F. E. Burstall Introduction A map OE : M ! N of Riemannian manifolds is harmonic if it extremises the energy functional: Z jdOEj 2 dvol on every compact subdomain of M . Harmonic maps arise in many different contexts in Geometry and Physics (for an overview

  11. Incorporating LCA tools in integrated simulation environments

    E-Print Network [OSTI]

    Pal, Vineeta; Papamichael, Konstantinos; Bourassa, Norman; Loffeld, John J.

    2001-01-01

    and Meil, J. K. , "ATHENA™: An LCA Decision Support Tool -in the Proceedings. INCORPORATING LCA TOOLS IN INTEGRATEDof Energy. INCORPORATING LCA TOOLS IN INTEGRATED SIMULATION

  12. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Life Cycle Analysis (LCA) of

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Life Cycle Analysis (LCA or the SEEDS Coordinator about the current status of the subject matter of a project/report". #12;LCA of Doug Mitchell Thunderbird Sports Complex #12;2 LCA of Doug Mitchell Thunderbird Sports Centre Submitted by

  13. UBC Social, Ecological Economic Development Studies (SEEDS) Student Report LCA Totem Park Residence

    E-Print Network [OSTI]

    UBC Social, Ecological Economic Development Studies (SEEDS) Student Report LCA ­ Totem Park of a project/report." #12;March 18, 2009 LCA ­ TOTEM PARK RESIDENCES Abstract This study looks at the total an idea of what the total embodied impact of the building complex is. The goal and scope of an LCA must

  14. LANDAU'S NECESSARY DENSITY CONDITIONS FOR LCA GROUPS

    E-Print Network [OSTI]

    Kutyniok, Gitta

    LANDAU'S NECESSARY DENSITY CONDITIONS FOR LCA GROUPS KARLHEINZ GR¨OCHENIG, GITTA KUTYNIOK's conditions to the setting of locally compact abelian (LCA) groups, relying in an analogous way on the basics

  15. The LCA Problem Revisited Michael A. Bender

    E-Print Network [OSTI]

    Danner, Andrew

    The LCA Problem Revisited Michael A. Bender SUNY Stony Brook Mart´in Farach-Colton ¡ Rutgers thus dispel the fre- quently held notion that an optimal LCA computation is unwieldy (LCA), Range Minimum Query (RMQ), Cartesian Tree. 1 Introduction One of the most fundamental

  16. The LCA Problem Revisited Michael A. Bender

    E-Print Network [OSTI]

    Bender, Michael

    The LCA Problem Revisited Michael A. Bender£ SUNY Stony Brook Mart´in Farach-ColtonÝ Rutgers thus dispel the fre- quently held notion that an optimal LCA computation is unwieldy (LCA), Range Minimum Query (RMQ), Cartesian Tree. 1 Introduction One of the most fundamental

  17. Life Cycle Greenhouse Gas Emissions of Nuclear Electricity Generation: Systematic Review and Harmonization

    Broader source: Energy.gov [DOE]

    As clean energy increasingly becomes part of the national dialogue, lenders, utilities, and lawmakers need the most comprehensive and accurate information on GHG emissions from various sources of energy to inform policy, planning, and investment decisions. The National Renewable Energy Laboratory (NREL) recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that gives decision makers and investors more precise estimates of life cycle GHG emissions for renewable and conventional generation, clarifying inconsistent and conflicting estimates in the published literature, and reducing uncertainty.

  18. Life Cycle Greenhouse Gas Emissions of Crystalline Silicon Photovoltaic Electricity Generation: Systematic Review and Harmonization

    Broader source: Energy.gov [DOE]

    As clean energy increasingly becomes part of the national dialogue, lenders, utilities, and lawmakers need the most comprehensive and accurate information on GHG emissions from various sources of energy to inform policy, planning, and investment decisions. The National Renewable Energy Laboratory (NREL) recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that gives decision makers and investors more precise estimates of life cycle GHG emissions for renewable and conventional generation, clarifying inconsistent and conflicting estimates in the published literature, and reducing uncertainty.

  19. Life Cycle Greenhouse Gas Emissions of Utility-Scale Wind Power: Systematic Review and Harmonization

    Broader source: Energy.gov [DOE]

    As clean energy increasingly becomes part of the national dialogue, lenders, utilities, and lawmakers need the most comprehensive and accurate information on GHG emissions from various sources of energy to inform policy, planning, and investment decisions. The National Renewable Energy Laboratory (NREL) recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that gives decision makers and investors more precise estimates of life cycle GHG emissions for renewable and conventional generation, clarifying inconsistent and conflicting estimates in the published literature, and reducing uncertainty.

  20. Life Cycle Greenhouse Gas Emissions of Thin-film Photovoltaic Electricity Generation: Systematic Review and Harmonization

    Office of Energy Efficiency and Renewable Energy (EERE)

    As clean energy increasingly becomes part of the national dialogue, lenders, utilities, and lawmakers need the most comprehensive and accurate information on GHG emissions from various sources of energy to inform policy, planning, and investment decisions. The National Renewable Energy Laboratory (NREL) recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that gives decision makers and investors more precise estimates of life cycle GHG emissions for renewable and conventional generation, clarifying inconsistent and conflicting estimates in the published literature, and reducing uncertainty.

  1. Life Cycle Greenhouse Gas Emissions of Coal-Fired Electricity Generation: Systematic Review and Harmonization

    Broader source: Energy.gov [DOE]

    As clean energy increasingly becomes part of the national dialogue, lenders, utilities, and lawmakers need the most comprehensive and accurate information on GHG emissions from various sources of energy to inform policy, planning, and investment decisions. The National Renewable Energy Laboratory (NREL) recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that gives decision makers and investors more precise estimates of life cycle GHG emissions for renewable and conventional generation, clarifying inconsistent and conflicting estimates in the published literature, and reducing uncertainty.

  2. Leadership in Energy and Environmental Design (LEED) - A critical evaluation by LCA and recommendations for improvement

    E-Print Network [OSTI]

    Humbert, Sebastien; Abeck, Heike; Bali, Nishil; Horvath, Arpad

    2007-01-01

    and thus perform a life-cycle assessment (LCA) on 45 creditsdesign (LEED); life cycle assessment (LCA); office buildingas inputs into life-cycle assessment (LCA). This analysis

  3. Coupling GIS and LCA for biodiversity assessments of land use: Part 2: Impact assessment

    E-Print Network [OSTI]

    Geyer, Roland; Lindner, Jan P.; Stoms, David M.; Davis, Frank W.; Wittstock, Bastian

    2010-01-01

    in life cycle assessment (LCA). Some production processes,support impacts of land use in LCA. J Clean Prod 8(4):313–010-0199-9 LAND USE IN LCA Coupling GIS and LCA for

  4. Shift Invariant Spaces on Lca Groups

    E-Print Network [OSTI]

    Cabrelli, Carlos

    2009-01-01

    In this article we extend the theory of shift-invariant spaces to the context of LCA groups. We introduce the notion of H-invariant space for a countable discrete subgroup H of an LCA group G, and show that the concept of range function and the techniques of fiberization are valid in this context. As a consequence of this generalization we prove characterizations of frames and Riesz bases of these spaces extending previous results, that were known for Rd and the lattice Zd .

  5. LCA-based Selection for XML Document Collections Georgia Koloniari

    E-Print Network [OSTI]

    Pitoura, Evaggelia

    LCA-based Selection for XML Document Collections Georgia Koloniari Department of Computer Science in the collection to the query. We consider keyword queries and support Lowest Common Ancestor (LCA) semantics of the LCA of those nodes in the XML docu- ment that contain the query keywords. To avoid evaluating queries

  6. Dynamic LCA Queries on Trees # Richard Cole + Ramesh Hariharan #

    E-Print Network [OSTI]

    Cole, Richard

    Dynamic LCA Queries on Trees # Richard Cole + Ramesh Hariharan # Abstract We show how to maintain. The primary use of LCA computations in a su#x tree is to determine the longest common prefix of two substrings common ancestor of the corresponding nodes. The first constant time LCA computation algorithm was due

  7. The LCA Problem Revisited Michael A. Bender1

    E-Print Network [OSTI]

    California at Davis, University of

    The LCA Problem Revisited Michael A. Bender1 and Mart´in Farach-Colton2 1 Department of Computer the frequently held notion that opti- mal LCA computation is unwieldy and unimplementable. Interestingly fundamental algorithmic problems on trees is how to find the Least Common Ancestor (LCA) of a pair of nodes

  8. Life Cycle Greenhouse Gas Emissions of Trough and Tower Concentrating Solar Power Electricity Generation: Systematic Review and Harmonization

    Broader source: Energy.gov [DOE]

    As clean energy increasingly becomes part of the national dialogue, lenders, utilities, and lawmakers need the most comprehensive and accurate information on GHG emissions from various sources of energy to inform policy, planning, and investment decisions. The National Renewable Energy Laboratory (NREL) recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that gives decision makers and investors more precise estimates of life cycle GHG emissions for renewable and conventional generation, clarifying inconsistent and conflicting estimates in the published literature, and reducing uncertainty.

  9. Environmental impact for offshore wind farms: Geolocalized Life Cycle Assessment (LCA) approach

    E-Print Network [OSTI]

    Boyer, Edmond

    Environmental impact for offshore wind farms: Geolocalized Life Cycle Assessment (LCA) approach and floating offshore wind farms. This work was undertaken within the EU- sponsored EnerGEO project, aiming, and its use for the evaluation of environmental impacts of wind energy. The effects of offshore wind farms

  10. harmonic analysis

    E-Print Network [OSTI]

    $author.value

    Faculty. Faculty listing for "harmonic analysis". Search People: ... Research Interests: complex analysis, harmonic analysis, and partial differential equations

  11. Landau's necessary density conditions for LCA groups

    E-Print Network [OSTI]

    Gröchenig, K; Seip, K

    2008-01-01

    H. Landau's necessary density conditions for sampling and interpolation may be viewed as a general principle resting on a basic fact of Fourier analysis: The complex exponentials $e^{i kx}$ ($k$ in $\\mathbb{Z}$) constitute an orthogonal basis for $L^2([-\\pi,\\pi])$. The present paper extends Landau's conditions to the setting of locally compact abelian (LCA) groups, relying in an analogous way on the basics of Fourier analysis. The technicalities--in either case of an operator theoretic nature--are however quite different. We will base our proofs on the comparison principle of J. Ramanathan and T. Steger.

  12. Modeling Measuring and Correcting the LCA of theModeling Measuring and Correcting the LCA of the Human EyeHuman Eye

    E-Print Network [OSTI]

    Ribak, Erez

    Modeling Measuring and Correcting the LCA of theModeling Measuring and Correcting the LCA aberration (LCA) and transverse chromatic aberration (TCA). In the presence of polychromatic light, these two types of chromatic aberrations have an impact on the retinal image. Studied isolated, both the LCA

  13. Coupling GIS and LCA for biodiversity assessments of land use: Part 1: Inventory modeling

    E-Print Network [OSTI]

    Geyer, Roland; Stoms, David M.; Lindner, Jan P.; Davis, Frank W.; Wittstock, Bastian

    2010-01-01

    467 DOI 10.1007/s11367-010-0170-9 LAND USE IN LCA CouplingGIS and LCA for biodiversity assessments of land use Part 1:while life cycle assessment (LCA) does not conventionally

  14. Leadership in Energy and Environmental Design (LEED) - A critical evaluation by LCA and recommendations for improvement

    E-Print Network [OSTI]

    Humbert, Sebastien; Abeck, Heike; Bali, Nishil; Horvath, Arpad

    2007-01-01

    LEED): A critical evaluation by LCA and recommendations forimprovement. Int J LCA 12 (special issue 1) 46-57. LifeLEED) A critical evaluation by LCA and recommendations for

  15. Evaluating indoor exposure modeling alternatives for LCA: A case study in the vehicle repair industry

    E-Print Network [OSTI]

    Demou, Evangelia

    2010-01-01

    International Journal of LCA submitted. Schmidt, W. -P. ,to Chemicals with LCA: The Examples of Trichloroethylene andToxic Substances in the Frame of LCA-The Multi-Media Fate,

  16. Coupling GIS and LCA for biodiversity assessments of land use: Part 2: Impact assessment

    E-Print Network [OSTI]

    Geyer, Roland; Lindner, Jan P.; Stoms, David M.; Davis, Frank W.; Wittstock, Bastian

    2010-01-01

    Evenness . Geographic information systems (GIS) .GIS-based inventory modeling . Habitats . Hemeroby . Land0199-9 LAND USE IN LCA Coupling GIS and LCA for biodiversity

  17. Forest Carbon and Biomass Energy – LCA Issues and Challenges

    Office of Energy Efficiency and Renewable Energy (EERE)

    Breakout Session 2D—Building Market Confidence and Understanding II: Carbon Accounting and Woody Biofuels Forest Carbon and Biomass Energy – LCA Issues and Challenges Reid Miner, Vice President, NCASI

  18. Coupling GIS and LCA for biodiversity assessments of land use: Part 1: Inventory modeling

    E-Print Network [OSTI]

    Geyer, Roland; Stoms, David M.; Lindner, Jan P.; Davis, Frank W.; Wittstock, Bastian

    2010-01-01

    scenarios were developed with GIS modeling. Current land use0170-9 LAND USE IN LCA Coupling GIS and LCA for biodiversityGeographic information systems (GIS) are adept at modeling

  19. Exploring the viability of probabilistic underspecification as a viable streamlining method for LCA

    E-Print Network [OSTI]

    Patanavanich, Siamrut

    2011-01-01

    Life cycle assessment (LCA) has gained much interest in the field of product development and decision making. The resource intensiveness of conducting an LCA has slowed more widespread adoption of the methodology. Although ...

  20. CYCLIC SUBSPACES FOR UNITARY REPRESENTATIONS OF LCA GROUPS: GENERALIZED ZAK TRANSFORM

    E-Print Network [OSTI]

    Hernández, Eugenio

    CYCLIC SUBSPACES FOR UNITARY REPRESENTATIONS OF LCA GROUPS: GENERALIZED ZAK TRANSFORM EUGENIO HERN-0372790-2799 of the Republic of Croatia. 1 #12;2 EUGENIO HERN´ANDEZ, HRVOJE SIKI´C, GUIDO WEISS, AND EDWARD WILSON abelian (LCA

  1. LCA comparison of windrow composting of yard wastes with use as alternative daily cover (ADC)

    E-Print Network [OSTI]

    Columbia University

    LCA comparison of windrow composting of yard wastes with use as alternative daily cover (ADC) Rob Assessment was made using the SimaPro LCA software and showed that the ADC scenario is more beneficial

  2. Leadership in Energy and Environmental Design (LEED) - A critical evaluation by LCA and recommendations for improvement

    E-Print Network [OSTI]

    Humbert, Sebastien; Abeck, Heike; Bali, Nishil; Horvath, Arpad

    2007-01-01

    nuclear energy. The ratios for ecoinvent are approximately 30% lower than for EIO-LCA.LCA and ecoinvent is stemming from the fact that in Europe a higher fraction of electricity comes from hydropower and nuclear

  3. LCA COMPARABILITY AND THE WASTE INDEX Jan Emblemsvg and Bert Bras

    E-Print Network [OSTI]

    LCA COMPARABILITY AND THE WASTE INDEX by Jan Emblemsvåg and Bert Bras Systems Realization with the current Life-Cycle Assessment (LCA) methods. One of the most serious problems, in our opinion and benchmarkability LCA will not survive long in the commercial world. It is therefore paramount that comparability

  4. Human intake fraction of toxic pollutants: a model comparison between caltox and uses-lca

    E-Print Network [OSTI]

    Huijbregts, Mark A.J.; Geelen, Loes M.J.; Hertwich, Edgar G.; McKone, Thomas E.; van de Meent, Dik

    2004-01-01

    of toxic substances in LCA. II: Assessing parameter06 iF fw- ingestion-USES-LCA (-) 1,0E-04 1,0E-02 Figure 5b04 iF fw-inhalation-USES-LCA (-) Figure 6a 1,0E-04 iF fw-

  5. USE OF LCA IN THE MINING INDUSTRY AND RESEARCH CHALLENGES Pascal Lesagel,2

    E-Print Network [OSTI]

    Aubertin, Michel

    USE OF LCA IN THE MINING INDUSTRY AND RESEARCH CHALLENGES Pascal Lesagel,2 , Catherine Reid1 - École Polytechnique de Montréal, Québec ABSTRACT Life Cycle Assessment (LCA) is a holistic environmental). The relevance of LCA for the mining industry is twofold. First, the mining industry has a role in providing

  6. Harmonic engine

    DOE Patents [OSTI]

    Bennett, Charles L. (Livermore, CA)

    2009-10-20

    A high efficiency harmonic engine based on a resonantly reciprocating piston expander that extracts work from heat and pressurizes working fluid in a reciprocating piston compressor. The engine preferably includes harmonic oscillator valves capable of oscillating at a resonant frequency for controlling the flow of working fluid into and out of the expander, and also preferably includes a shunt line connecting an expansion chamber of the expander to a buffer chamber of the expander for minimizing pressure variations in the fluidic circuit of the engine. The engine is especially designed to operate with very high temperature input to the expander and very low temperature input to the compressor, to produce very high thermal conversion efficiency.

  7. Coupling GIS and LCA for biodiversity assessments of land use: Part 1: Inventory modeling

    E-Print Network [OSTI]

    Geyer, Roland; Stoms, David M.; Lindner, Jan P.; Davis, Frank W.; Wittstock, Bastian

    2010-01-01

    explicit manner, while life cycle assessment (LCA) does notand system extension of life-cycle assessment studies. J Ind2002) Handbook on life cycle assessment, operational guide

  8. Shift-modulation invariant spaces on LCA groups

    E-Print Network [OSTI]

    Cabrelli, Carlos

    2011-01-01

    A $(K,\\Lambda)$ shift-modulation invariant space is a subspace of $L^2(G)$, that is invariant by translations along elements in $K$ and modulations by elements in $\\Lambda$. Here $G$ is a locally compact abelian group, and $K$ and $\\Lambda$ are closed subgroups of $G$ and the dual group $\\hat G$, respectively. In this article we provide a characterization of shift-modulation invariant spaces in this general context when $K$ and $\\Lambda$ are uniform lattices. This extends previous results known for $L^2(\\R^d)$. We develop fiberization techniques and suitable range functions adapted to LCA groups needed to provide the desired characterization.

  9. Harmonic engine

    DOE Patents [OSTI]

    Bennett, Charles L.; Sewall, Noel; Boroa, Carl

    2014-08-19

    An engine based on a reciprocating piston engine that extracts work from pressurized working fluid. The engine includes a harmonic oscillator inlet valve capable of oscillating at a resonant frequency for controlling the flow of working fluid into of the engine. In particular, the inlet valve includes an inlet valve head and a spring arranged together as a harmonic oscillator so that the inlet valve head is moveable from an unbiased equilibrium position to a biased closed position occluding an inlet. Upon releasing the inlet valve the inlet valve head undergoes a single oscillation past the equilibrium positio to a maximum open position and returns to a biased return position close to the closed position to choke the flow and produce a pressure drop across the inlet valve causing the inlet valve to close. Protrusions carried either by the inlet valve head or piston head are used to bump open the inlet valve from the closed position and initiate the single oscillation of the inlet valve head, and protrusions carried either by the outlet valve head or piston head are used to close the outlet valve ahead of the bump opening of the inlet valve.

  10. Renewable Diesel from Algal Lipids: An Integrated Baseline for Cost, Emissions, and Resource Potential from a Harmonized Model

    SciTech Connect (OSTI)

    Davis, R.; Fishman, D.; Frank, E. D.; Wigmosta, M. S.; Aden, A.; Coleman, A. M.; Pienkos, P. T.; Skaggs, R. J.; Venteris, E. R.; Wang, M. Q.

    2012-06-01

    The U.S. Department of Energy's Biomass Program has begun an initiative to obtain consistent quantitative metrics for algal biofuel production to establish an 'integrated baseline' by harmonizing and combining the Program's national resource assessment (RA), techno-economic analysis (TEA), and life-cycle analysis (LCA) models. The baseline attempts to represent a plausible near-term production scenario with freshwater microalgae growth, extraction of lipids, and conversion via hydroprocessing to produce a renewable diesel (RD) blendstock. Differences in the prior TEA and LCA models were reconciled (harmonized) and the RA model was used to prioritize and select the most favorable consortium of sites that supports production of 5 billion gallons per year of RD. Aligning the TEA and LCA models produced slightly higher costs and emissions compared to the pre-harmonized results. However, after then applying the productivities predicted by the RA model (13 g/m2/d on annual average vs. 25 g/m2/d in the original models), the integrated baseline resulted in markedly higher costs and emissions. The relationship between performance (cost and emissions) and either productivity or lipid fraction was found to be non-linear, and important implications on the TEA and LCA results were observed after introducing seasonal variability from the RA model. Increasing productivity and lipid fraction alone was insufficient to achieve cost and emission targets; however, combined with lower energy, less expensive alternative technology scenarios, emissions and costs were substantially reduced.

  11. Eco-efficient waste glass recycling: Integrated waste management and green product development through LCA

    SciTech Connect (OSTI)

    Blengini, Gian Andrea, E-mail: blengini@polito.it [DISPEA - Department of Production Systems and Business Economics, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin (Italy); CNR-IGAG, Institute of Environmental Geology and Geo-Engineering, Corso Duca degli Abruzzi 24, 10129 Turin (Italy); Busto, Mirko, E-mail: mirko.busto@polito.it [DISPEA - Department of Production Systems and Business Economics, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin (Italy); Fantoni, Moris, E-mail: moris.fantoni@polito.it [DITAG - Department of Land, Environment and Geo-Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin (Italy); Fino, Debora, E-mail: debora.fino@polito.it [DISMIC - Department of Materials Science and Chemical Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin (Italy)

    2012-05-15

    Highlights: Black-Right-Pointing-Pointer A new eco-efficient recycling route for post-consumer waste glass was implemented. Black-Right-Pointing-Pointer Integrated waste management and industrial production are crucial to green products. Black-Right-Pointing-Pointer Most of the waste glass rejects are sent back to the glass industry. Black-Right-Pointing-Pointer Recovered co-products give more environmental gains than does avoided landfill. Black-Right-Pointing-Pointer Energy intensive recycling must be limited to waste that cannot be closed-loop recycled. - Abstract: As part of the EU Life + NOVEDI project, a new eco-efficient recycling route has been implemented to maximise resources and energy recovery from post-consumer waste glass, through integrated waste management and industrial production. Life cycle assessment (LCA) has been used to identify engineering solutions to sustainability during the development of green building products. The new process and the related LCA are framed within a meaningful case of industrial symbiosis, where multiple waste streams are utilised in a multi-output industrial process. The input is a mix of rejected waste glass from conventional container glass recycling and waste special glass such as monitor glass, bulbs and glass fibres. The green building product is a recycled foam glass (RFG) to be used in high efficiency thermally insulating and lightweight concrete. The environmental gains have been contrasted against induced impacts and improvements have been proposed. Recovered co-products, such as glass fragments/powders, plastics and metals, correspond to environmental gains that are higher than those related to landfill avoidance, whereas the latter is cancelled due to increased transportation distances. In accordance to an eco-efficiency principle, it has been highlighted that recourse to highly energy intensive recycling should be limited to waste that cannot be closed-loop recycled.

  12. Energy and Society (ER100/PP184/ER200/PP284) Topics: Personal energy audit, nuclear, fracking, LCA

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Energy and Society (ER100/PP184/ER200/PP284) Topics: Personal energy audit, nuclear, fracking, LCA and Society (ER100/PP184/ER200/PP284) Topics: Personal energy audit, nuclear, fracking, LCA Due Nov. 6

  13. Review of LCA studies of solid waste management systems – Part I: Lessons learned and perspectives

    SciTech Connect (OSTI)

    Laurent, Alexis; Bakas, Ioannis; Clavreul, Julie; Bernstad, Anna; Niero, Monia; Gentil, Emmanuel; Hauschild, Michael Z.; Christensen, Thomas H.

    2014-03-01

    Highlights: • We perform a critical review of 222 LCA studies of solid waste management systems. • Studies mainly concentrated in Europe with little application in developing countries. • Assessments of relevant waste types apart from household waste have been overlooked. • Local specificities of systems prevent a meaningful generalisation of the LCA results. • LCA should support recommendations representative of the local conditions. - Abstract: The continuously increasing solid waste generation worldwide calls for management strategies that integrate concerns for environmental sustainability. By quantifying environmental impacts of systems, life cycle assessment (LCA) is a tool, which can contribute to answer that call. But how, where and to which extent has it been applied to solid waste management systems (SWMSs) until now, and which lessons can be learnt from the findings of these LCA applications? To address these questions, we performed a critical review of 222 published LCA studies of SWMS. We first analysed the geographic distribution and found that the published studies have primarily been concentrated in Europe with little application in developing countries. In terms of technological coverage, they have largely overlooked application of LCA to waste prevention activities and to relevant waste types apart from household waste, e.g. construction and demolition waste. Waste management practitioners are thus encouraged to abridge these gaps in future applications of LCA. In addition to this contextual analysis, we also evaluated the findings of selected studies of good quality and found that there is little agreement in the conclusions among them. The strong dependence of each SWMS on local conditions, such as waste composition or energy system, prevents a meaningful generalisation of the LCA results as we find it in the waste hierarchy. We therefore recommend stakeholders in solid waste management to regard LCA as a tool, which, by its ability of capturing the local specific conditions in the modelling of environmental impacts and benefits of a SWMS, allows identifying critical problems and proposing improvement options adapted to the local specificities.

  14. From Revisiting the LCA-based Approach to a New Semantics-based Approach for XML Keyword Search

    E-Print Network [OSTI]

    Ling, Tok Wang

    From Revisiting the LCA-based Approach to a New Semantics-based Approach for XML Keyword Search for data-centric XML documents are based on the compu- tation of Lowest Common Ancestors (LCA), such as SLCA and MLCA. In this paper, we show that the LCA is not always a correct search model for processing

  15. Abstract--To reduce the cost associated with screening lifecycle assessments (LCAs), we propose treating LCA as a data mining

    E-Print Network [OSTI]

    Ramakrishnan, Naren

    treating LCA as a data mining problem and automating the process of assigning impact factors to inventory components. We describe three sub-problems involved in automating LCA and provide illustrative case studies laborious manual LCA process. Index Terms--Data mining, environmental management, green design

  16. Extra Invariance of Shift-Invariant Spaces on LCA Groups

    E-Print Network [OSTI]

    Anastasio, Magalí; Paternostro, Victoria

    2009-01-01

    Let G be an LCA group and K a closed subgroup of G. A closed subspace of L^2(G) is called K-invariant if it is invariant under translations by elements of K. Assume now that H is a countable uniform lattice in G and M is any closed subgroup of G containing H. In this article we study necessary and sufficient conditions for an H-invariant space to be M-invariant. As a consequence of our results we prove that for each closed subgroup M of G containing the lattice H, there exists an H-invariant space S that is exactly M-invariant. That is, S is not invariant under any other subgroup M' containing M. We also obtain estimates on the support of the Fourier transform of the generators of the H-invariant space, related to its M-invariance.

  17. Life Cycle GHG Emissions from Conventional Natural Gas Power Generation: Systematic Review and Harmonization (Presentation)

    SciTech Connect (OSTI)

    Heath, G.; O'Donoughue, P.; Whitaker, M.

    2012-12-01

    This research provides a systematic review and harmonization of the life cycle assessment (LCA) literature of electricity generated from conventionally produced natural gas. We focus on estimates of greenhouse gases (GHGs) emitted in the life cycle of electricity generation from conventionally produced natural gas in combustion turbines (NGCT) and combined-cycle (NGCC) systems. A process we term "harmonization" was employed to align several common system performance parameters and assumptions to better allow for cross-study comparisons, with the goal of clarifying central tendency and reducing variability in estimates of life cycle GHG emissions. This presentation summarizes preliminary results.

  18. LCA for household waste management when planning a new urban settlement

    SciTech Connect (OSTI)

    Slagstad, Helene; Brattebo, Helge

    2012-07-15

    Highlights: Black-Right-Pointing-Pointer Household waste management of a new carbon neutral settlement. Black-Right-Pointing-Pointer EASEWASTE as a LCA tool to compare different centralised and decentralised solutions. Black-Right-Pointing-Pointer Environmental benefit or close to zero impact in most of the categories. Black-Right-Pointing-Pointer Paper and metal recycling important for the outcome. Black-Right-Pointing-Pointer Discusses the challenges of waste prevention planning. - Abstract: When planning for a new urban settlement, industrial ecology tools like scenario building and life cycle assessment can be used to assess the environmental quality of different infrastructure solutions. In Trondheim, a new greenfield settlement with carbon-neutral ambitions is being planned and five different scenarios for the waste management system of the new settlement have been compared. The results show small differences among the scenarios, however, some benefits from increased source separation of paper and metal could be found. The settlement should connect to the existing waste management system of the city, and not resort to decentralised waste treatment or recovery methods. However, as this is an urban development project with ambitious goals for lifestyle changes, effort should be put into research and initiatives for proactive waste prevention and reuse issues.

  19. Harmonic Oscillator Frank Rioux

    E-Print Network [OSTI]

    Rioux, Frank

    Harmonic Oscillator Frank Rioux Schrodinger's equation is integrated numerically for the first three energy states for the harmonic oscillator. The integration algorithm is taken from J. C. Hansen, J energy: = 0.5n. The calculations below show the virial theorem is satisfied for the harmonic

  20. Polynomial Harmonic Morphisms Martin Svensson

    E-Print Network [OSTI]

    Gudmundsson, Sigmundur

    Polynomial Harmonic Morphisms Martin Svensson Examensarbete, 20 poang Lunds Universitet November Chapter 2. Harmonic Maps 13 1. The Second Fundamental Form 13 2. Harmonic Maps 18 3. Harmonic Functions 25 Chapter 3. Harmonic Morphisms 29 1. Horizontal Conformality 29 2. Harmonic Morphisms 33 3. The Existence

  1. When is the product of two planar harmonic mappings harmonic?

    E-Print Network [OSTI]

    Mortini, Raymond

    When is the product of two planar harmonic mappings harmonic? Raymond Mortini Lecturas Matem´aticas Volumen 23 (2002), p´aginas 5­10 Abstract. We determine all complex-valued harmonic functions u and v defined on a planar domain for which uv, respectively u2 - v2 is harmonic Key words and phrases. Harmonic

  2. On conformal supergravity and harmonic superspace

    E-Print Network [OSTI]

    Daniel Butter

    2015-09-01

    This paper describes a fully covariant approach to harmonic superspace. It is based on the conformal superspace description of conformal supergravity and involves extending the supermanifold M^{4|8} by the tangent bundle of CP^1. The resulting superspace M^{4|8} x TCP^1 can be identified in a certain gauge with the conventional harmonic superspace M^{4|8} x S^2. This approach not only makes the connection to projective superspace transparent, but simplifies calculations in harmonic superspace significantly by eliminating the need to deal directly with supergravity prepotentials. As an application of the covariant approach, we derive from harmonic superspace the full component action for the sigma model of a hyperkahler cone coupled to conformal supergravity. Further applications are also sketched.

  3. Life Cycle Assessment (LCA) is used in the chemical process sector to compare the environmental merits of different product or process alternatives. One of the tasks that involves much time and cost in LCA studies

    E-Print Network [OSTI]

    Life Cycle Assessment (LCA) is used in the chemical process sector to compare the environmental IN STREAMLINED LIFE CYCLE ASSESSMENT Exploring the Case of Petrochemical Refineries and Polymer Manufacturing to generic crude oil refining and polymer manufacturing modules. By assessing the variation in LCA results

  4. HARMONIC MORPHISMS BETWEEN RIEMANNIAN MANIFOLDS

    E-Print Network [OSTI]

    Gudmundsson, Sigmundur

    HARMONIC MORPHISMS BETWEEN RIEMANNIAN MANIFOLDS SIGMUNDUR GUDMUNDSSON AND MARTIN SVENSSON theory of harmonic morphisms between Riemannian manifolds. This research field has developed rapidly geometry a harmonic morphism is a map : (M, g) (N, h) between Riemannian manifolds with the property

  5. Electrodynamic spherical harmonic

    E-Print Network [OSTI]

    Andrey Novitsky

    2008-03-28

    Electrodynamic spherical harmonic is a second rank tensor in three-dimensional space. It allows to separate the radial and angle variables in vector solutions of Maxwell's equations. Using the orthonormalization for electrodynamic spherical harmonic, a boundary problem on a sphere can be easily solved.

  6. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Streamlined LCA of Paper Towel End of Life Options for UBC SEEDS Recycling vs.

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Streamlined LCA of Paper LCA of Paper Towel End of Life Options for UBC SEEDS Recycling vs. Composting by Helen Brennek, Landon the environmental footprint of paper towels used in the Student Union Building (SUB). This streamlined LCA provides

  7. Industrial Ecology and LCA, Instructor Iddo Wernick Fall 2014 Syllabus (subject to refinement/updating)

    E-Print Network [OSTI]

    Wolberg, George

    Industrial Ecology and LCA, Instructor Iddo Wernick Fall 2014 Syllabus (subject to refinement/updating) 1 SUS-7300C INDUSTRIAL ECOLOGY AND LIFE CYCLE ANALYSIS Description: Students will be introduced to the purpose, philosophy, and applications of Industrial Ecology as they affect environmental and urban

  8. Wood Pellets for UBC Boilers Replacing Natural Gas Based on LCA

    E-Print Network [OSTI]

    Wood Pellets for UBC Boilers Replacing Natural Gas Based on LCA Submitted to Dr. Bi By Bernard Chan Pellets for UBC Boilers Replacing Natural Gas" By Bernard Chan, Brian Chan, and Christopher Young Abstract This report studies the feasibility of replacing natural gas with wood pellets for UBC boilers. A gasification

  9. UNDERSTANDING LCA RESULTS VARIABILITY: DEVELOPING GLOBAL SENSITIVITY ANALYSIS WITH SOBOL INDICES. A FIRST

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    considered as one of the main relevant tool to study a product or system environmental impacts. Therefore, LCA has been widely used in order to assess the environmental impacts for a panorama of systems a comprehensive panorama of systems environmental impacts [2],[3],[4]. These meta- analyses aim at synthesizing

  10. Assessing the prospective environmental impacts of photovoltaic systems based on a simplified LCA model

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Assessing the prospective environmental impacts of photovoltaic systems based on a simplified LCA model. The latter generates the environmental impacts distribution, representative of the potential the environmental impacts of PV systems are small during their operating phase, they are more significant during

  11. WATER USE IN LCA Life cycle consumptive water use for oil shale development

    E-Print Network [OSTI]

    Jaramillo, Paulina

    WATER USE IN LCA Life cycle consumptive water use for oil shale development and implications Heidelberg 2013 Abstract Purpose Oil shale is an unconventional petroleum source that can be produced domestically in the USA. Oil shale resources are primarily located in Utah, Wyoming, and Colorado, within

  12. LCA to choose among alternative design solutions: The case study of a new Italian incineration line

    SciTech Connect (OSTI)

    Scipioni, A. [Department of Chemical Engineering, University of Padua, Via Marzolo 9, 35131 Padua (Italy)], E-mail: scipioni@unipd.it; Mazzi, A.; Niero, M.; Boatto, T. [Department of Chemical Engineering, University of Padua, Via Marzolo 9, 35131 Padua (Italy)

    2009-09-15

    At international level LCA is being increasingly used to objectively evaluate the performances of different Municipal Solid Waste (MSW) management solutions. One of the more important waste management options concerns MSW incineration. LCA is usually applied to existing incineration plants. In this study LCA methodology was applied to a new Italian incineration line, to facilitate the prediction, during the design phase, of its potential environmental impacts in terms of damage to human health, ecosystem quality and consumption of resources. The aim of the study was to analyse three different design alternatives: an incineration system with dry flue gas cleaning (without- and with-energy recovery) and one with wet flue gas cleaning. The last two technological solutions both incorporating facilities for energy recovery were compared. From the results of the study, the system with energy recovery and dry flue gas cleaning revealed lower environmental impacts in relation to the ecosystem quality. As LCA results are greatly affected by uncertainties of different types, the second part of the work provides for an uncertainty analysis aimed at detecting the extent output data from life cycle analysis are influenced by uncertainty of input data, and employs both qualitative (pedigree matrix) and quantitative methods (Monte Carlo analysis)

  13. Lab 6: Forced Harmonic Motion Driven harmonic oscillation

    E-Print Network [OSTI]

    Gustafsson, Torgny

    Lab 6: Forced Harmonic Motion Driven harmonic oscillation Example: Atomic force microscope watch, circuit, ... #12;A constant energy flow at steady state ( )F t dF Rx= - 0oin ut PP + = #12;Forced harmonic t - = + #12;Forced harmonic oscillation (cont.) ( ) ( ) ( ) 0 2 2 0 cos 2 sin cos cosF m

  14. Harmonic Morphisms -Basics Sigmundur Gudmundsson

    E-Print Network [OSTI]

    Gudmundsson, Sigmundur

    Harmonic Morphisms - Basics Sigmundur Gudmundsson Department of Mathematics Faculty of Science Lund University Sigmundur.Gudmundsson@math.lu.se March 11, 2014 #12;Harmonic Maps in Gaussian Geometry Harmonic Maps in Riemannian Geometry Outline 1 Harmonic Maps in Gaussian Geometry Holomorphic Functions in One

  15. On harmonic binomial series

    E-Print Network [OSTI]

    Mark W. Coffey

    2008-12-09

    We evaluate binomial series with harmonic number coefficients, providing recursion relations, integral representations, and several examples. The results are of interest to analytic number theory, the analysis of algorithms, and calculations of theoretical physics, as well as other applications.

  16. Optical harmonic generator

    DOE Patents [OSTI]

    Summers, Mark A. (Livermore, CA); Eimerl, David (Pleasanton, CA); Boyd, Robert D. (Livermore, CA)

    1985-01-01

    A pair of uniaxial birefringent crystal elements are fixed together to form a serially arranged, integral assembly which, alternatively, provides either a linearly or elliptically polarized second-harmonic output wave or a linearly polarized third-harmonic output wave. The "extraordinary" or "e" directions of the crystal elements are oriented in the integral assembly to be in quadrature (90.degree.). For a second-harmonic generation in the Type-II-Type-II angle tuned case, the input fundamental wave has equal amplitude "o" and "e" components. For a third-harmonic generation, the input fundamental wave has "o" and "e" components whose amplitudes are in a ratio of 2:1 ("o":"e" reference first crystal). In the typical case of a linearly polarized input fundamental wave this can be accomplished by simply rotating the crystal assembly about the input beam direction by 10.degree.. For both second and third harmonic generation input precise phase-matching is achieved by tilting the crystal assembly about its two sensitive axes ("o").

  17. Optical harmonic generator

    DOE Patents [OSTI]

    Summers, M.A.; Eimerl, D.; Boyd, R.D.

    1982-06-10

    A pair of uniaxial birefringent crystal elements are fixed together to form a serially arranged, integral assembly which, alternatively, provides either a linearly or elliptically polarized second-harmonic output wave or a linearly polarized third-harmonic output wave. The extraordinary or e directions of the crystal elements are oriented in the integral assembly to be in quadrature (90/sup 0/). For a second-harmonic generation in the Type-II-Type-II angle tuned case, the input fundamental wave has equal amplitude o and e components. For a third-harmonic generation, the input fundamental wave has o and e components whose amplitudes are in a ratio of 2:1 (o:e reference first crystal). In the typical case of a linearly polarized input fundamental wave this can be accomplished by simply rotating the crystal assembly about the input beam direction by 10/sup 0/. For both second and third harmonic generation input precise phase-matching is achieved by tilting the crystal assembly about its two sensitive axeses (o).

  18. Harmonic resolution as a holographic quantum number

    E-Print Network [OSTI]

    Bousso, Raphael

    2009-01-01

    LBNL- 57239 Harmonic resolution as a holographic quantumhep-th/0310223 UCB-PTH-03/26 Harmonic resolution as aquantum number, the harmonic resolution K. The Bekenstein

  19. Harmonic functions on Walsh's Brownian motion

    E-Print Network [OSTI]

    Jehring, Kristin Elizabeth

    2009-01-01

    4.3 Harmonic Functions . . . . . . . . . . . . . . .Chapter 3 Harmonic Functions . . . . . . . . . . . . . . 3.1Markov Chains 4.3.2 Harmonic Functions for the Embedded

  20. Zach Harmon Air Chemistry

    E-Print Network [OSTI]

    Toohey, Darin W.

    in the Troposphere Summary of Problem/Impact United States dependency on foreign oil and increased energy consumptionZach Harmon 810907207 Air Chemistry Natural Gas Production Impacts on levels of ozone administration to encourage fast growth to reduce dependency of foreign oil and be energy independent. It

  1. HARMONIC MORPHISMS ON HOMOGENEOUS HADAMARD

    E-Print Network [OSTI]

    Gudmundsson, Sigmundur

    HARMONIC MORPHISMS ON HOMOGENEOUS HADAMARD MANIFOLDS JONAS NORDSTRÃ?M Master's thesis 2010:E14;#12;Abstract In this thesis we investigate the existence of complex-valued harmonic morphisms on Lie groups of their Lie algebra. This decomposi- tion allows us to define harmonic morphisms to Rn , n 2. Any homogeneous

  2. Second Harmonic Generation From Surfaces

    E-Print Network [OSTI]

    Botti, Silvana

    Second Harmonic Generation From Surfaces Nicolas Tancogne-Dejean, Valérie Véniard Condensed Matter/DSM European Theoretical Spectroscopy Facility #12;2 Outline Nonlinear optic and second harmonic generation;4 Second harmonic generation First nonlinear term Centrosymmetric material : (2) = 0 (3)First nonlinear

  3. Harmonic Superspace Gaugeon Formalism for the ABJM Theory

    E-Print Network [OSTI]

    Mir Faizal

    2012-07-12

    In this paper we will analyse the ABJM theory in harmonic superspace. The harmonic superspace variables will be parameterized by the coset $SU(2)/U(1)$ and thus will have manifest $\\mathcal{N} =3$ supersymmetry. We will study the quantum gauge transformations and the BRST transformations of this theory in gaugeon formalism. We will use this BRST symmetry to project out the physical sub-space from the total Hilbert space. We will also show that the evolution of the $\\mathcal{S}$-matrix is unitary for this ABJM theory in harmonic superspace.

  4. Review of LCA studies of solid waste management systems – Part II: Methodological guidance for a better practice

    SciTech Connect (OSTI)

    Laurent, Alexis; Clavreul, Julie; Bernstad, Anna; Bakas, Ioannis; Niero, Monia; Gentil, Emmanuel; Christensen, Thomas H.; Hauschild, Michael Z.

    2014-03-01

    Highlights: • We perform a critical review of 222 LCA studies of solid waste management systems. • We analyse the past LCA practice against the ISO standard and ILCD Handbook guidance. • Malpractices exist in many methodological aspects with large variations among studies. • Many of these aspects are important for the reliability of the results. • We provide detailed recommendations to practitioners of waste management LCAs. - Abstract: Life cycle assessment (LCA) is increasingly used in waste management to identify strategies that prevent or minimise negative impacts on ecosystems, human health or natural resources. However, the quality of the provided support to decision- and policy-makers is strongly dependent on a proper conduct of the LCA. How has LCA been applied until now? Are there any inconsistencies in the past practice? To answer these questions, we draw on a critical review of 222 published LCA studies of solid waste management systems. We analyse the past practice against the ISO standard requirements and the ILCD Handbook guidelines for each major step within the goal definition, scope definition, inventory analysis, impact assessment, and interpretation phases of the methodology. Results show that malpractices exist in several aspects of the LCA with large differences across studies. Examples are a frequent neglect of the goal definition, a frequent lack of transparency and precision in the definition of the scope of the study, e.g. an unclear delimitation of the system boundaries, a truncated impact coverage, difficulties in capturing influential local specificities such as representative waste compositions into the inventory, and a frequent lack of essential sensitivity and uncertainty analyses. Many of these aspects are important for the reliability of the results. For each of them, we therefore provide detailed recommendations to practitioners of waste management LCAs.

  5. HVDC-AC system interaction from AC harmonics. Volume 1. Harmonic impedance calculations. Final report

    SciTech Connect (OSTI)

    Breuer, G D; Chow, J H; Lindh, C B; Miller, N W; Numrich, F H; Price, W W; Turner, A E; Whitney, R R

    1982-09-01

    Improved methods are needed to characterize ac system harmonic behavior for ac filter design for HVDC systems. The purpose of this General Electric Company RP1138 research is to evaluate the present filter design practice and to investigate methods for calculating system harmonic impedances. An overview of ac filter design for HVDC systems and a survey of literature related to filter design have been performed. Two methods for calculating system harmonic impedances have been investigated. In the measurement method, an instrumentation system for measuring system voltage and current has been assembled. Different schemes of using the measurements to calculate system harmonic impedances have been studied. In the analytical method, a procedure to include various operating conditions has been proposed. Computer programs for both methods have been prepared, and the results of the measurement and analytical methods analyzed. A conclusion of the project is that the measurement and analytical methods both provided reasonable results. There are correlations between the measured and analytical results for most harmonics, although there are discrepancies between the assumptions used in the two methods. A sensitivity approach has been proposed to further correlate the results. From the results of the analysis, it is recommended that both methods should be tested further. For the measurement method, more testing should be done to cover different system operating conditions. In the analytical method, more detailed models for representing system components should be studied. In addition, alternative statistical and sensitivity approaches should be attempted.

  6. On the harmonic map equation

    E-Print Network [OSTI]

    S. C. Tiwari

    2007-06-09

    A generalized harmonic map equation is presented based on the proposed action functional in the Weyl space (PLA, 135, 315, 1989).

  7. Harmonic Wavelet Transform and Image Approximation

    E-Print Network [OSTI]

    Zhang, Zhihua; Saito, Naoki

    2010-01-01

    DOI 10.1007/s10851-010-0202-x Harmonic Wavelet Transform andwe approximate f by a harmonic function u such that thebanks. We call this the Harmonic Wavelet Transform (HWT).

  8. RADON TRANSFORM INVERSION BASED ON HARMONIC ANALYSIS OF THE EUCLIDEAN MOTION GROUP

    E-Print Network [OSTI]

    Yazici, Birsen

    RADON TRANSFORM INVERSION BASED ON HARMONIC ANALYSIS OF THE EUCLIDEAN MOTION GROUP Can Evren Yarman of the projection slice theorem using harmonic analysis of the Euclidean motion group (M(N)). The Radon transform to new algo- rithms for the inversion of the Radon transform. 1. INTRODUCTION The Radon transform forms

  9. Harmonic bundles, topological-antitopological fusion

    E-Print Network [OSTI]

    Henri Poincaré -Nancy-Université, Université

    Harmonic bundles, topological-antitopological fusion and the related pluriharmonic maps Lars Sch associated to a harmonic bundle 7 1 Introduction Topological-antitopological fusion or tt -geometry

  10. Life of Sugar: Developing Lifecycle Methods to Evaluate the Energy and Environmental Impacts of Sugarcane Biofuels

    E-Print Network [OSTI]

    Gopal, Anand Raja

    2011-01-01

    LCA . . . . . . . . . . . . . . . . . . . . . . .LCA . . . . . . . . . . . . . . . . . . . . . . . . . . . .in LCA . . . . . . . . . . . . . . . . . . . . . .

  11. Virasoro algebra from harmonic superspace

    SciTech Connect (OSTI)

    Saidi, E.H.; Zakkari, M. (International Centre for Theoretical Physics, Trieste (Italy))

    1992-07-15

    Using harmonic superspace techniques we construct a new field realization of the Virasoro algebra. The main conformal objects are U(1) Cartan tensors instead of the U(1) Lorentz ones. The new conformal model, which admits moreover a {ital d}=2 (4,0) global supersymmetry, is constructed out of the infinitely relaxed Howe-Stelle-Townsend and Fayet-Sohnius hypermultiplets. The conformal current {ital T}{sup 4+} together with the harmonic superspace operator product expansion rules are given. The Virasoro algebra and the harmonic superspace Schwarzian derivative {ital S}{sup 4+} are also derived.

  12. HARMONIC TWOSPHERES IN COMPACT SYMMETRIC SPACES, REVISITED

    E-Print Network [OSTI]

    Bath, University of

    HARMONIC TWO­SPHERES IN COMPACT SYMMETRIC SPACES, REVISITED F. E. Burstall and M. A. Guest Introduction The purpose of this article is to give a new description of harmonic maps from the two­sphere S 2 of such harmonic maps occur when G=K = S n or CP n . In 1967, E. Calabi gave a construction of all harmonic maps

  13. Harmonic Broadcasting Is Optimal Lars Engebretsen

    E-Print Network [OSTI]

    Sudan, Madhu

    Harmonic Broadcasting Is Optimal Lars Engebretsen Madhu Sudan Abstract Harmonic broadcasting-on-demand broadcasting. In this paper, we note that harmonic broadcasting is actually a special case of the priority argument--that it is impossible to achieve the design goals of harmonic broadcasting using a shorter

  14. High Harmonic Generation Physics 208A Presentation

    E-Print Network [OSTI]

    Budker, Dmitry

    High Harmonic Generation Physics 208A Presentation October 11, 2004 Tom Allison UC Berkeley #12 to Fourier components of the polarization at harmonics of the laser frequency, creating radiation at harmonics of the laser frequency. #12;· First demonstration of second harmonic generation by P.A. Franken et

  15. On The Harmonic Oscillator Group

    E-Print Network [OSTI]

    Raquel M. Lopez; Sergei K. Suslov; Jose M. Vega-Guzman

    2011-12-04

    We discuss the maximum kinematical invariance group of the quantum harmonic oscillator from a view point of the Ermakov-type system. A six parameter family of the square integrable oscillator wave functions, which seems cannot be obtained by the standard separation of variables, is presented as an example. The invariance group of generalized driven harmonic oscillator is shown to be isomorphic to the corresponding Schroedinger group of the free particle.

  16. Echo-Enabled Harmonic Generation

    SciTech Connect (OSTI)

    Stupakov, Gennady; /SLAC

    2012-06-28

    A recently proposed concept of the Echo-Enabled Harmonic Generation (EEHG) FEL uses two laser modulators in combination with two dispersion sections to generate a high-harmonic density modulation in a relativistic beam. This seeding technique holds promise of a one-stage soft x-ray FEL that radiates not only transversely but also longitudinally coherent pulses. Currently, an experimental verification of the concept is being conducted at the SLAC National Accelerator Laboratory aimed at the demonstration of the EEHG.

  17. Life Cycle Greenhouse Gas Emissions of Coal-Fired Electricity Generation: Systematic Review and Harmonization

    SciTech Connect (OSTI)

    Whitaker, M.; Heath, G. A.; O'Donoughue, P.; Vorum, M.

    2012-04-01

    This systematic review and harmonization of life cycle assessments (LCAs) of utility-scale coal-fired electricity generation systems focuses on reducing variability and clarifying central tendencies in estimates of life cycle greenhouse gas (GHG) emissions. Screening 270 references for quality LCA methods, transparency, and completeness yielded 53 that reported 164 estimates of life cycle GHG emissions. These estimates for subcritical pulverized, integrated gasification combined cycle, fluidized bed, and supercritical pulverized coal combustion technologies vary from 675 to 1,689 grams CO{sub 2}-equivalent per kilowatt-hour (g CO{sub 2}-eq/kWh) (interquartile range [IQR]= 890-1,130 g CO{sub 2}-eq/kWh; median = 1,001) leading to confusion over reasonable estimates of life cycle GHG emissions from coal-fired electricity generation. By adjusting published estimates to common gross system boundaries and consistent values for key operational input parameters (most importantly, combustion carbon dioxide emission factor [CEF]), the meta-analytical process called harmonization clarifies the existing literature in ways useful for decision makers and analysts by significantly reducing the variability of estimates ({approx}53% in IQR magnitude) while maintaining a nearly constant central tendency ({approx}2.2% in median). Life cycle GHG emissions of a specific power plant depend on many factors and can differ from the generic estimates generated by the harmonization approach, but the tightness of distribution of harmonized estimates across several key coal combustion technologies implies, for some purposes, first-order estimates of life cycle GHG emissions could be based on knowledge of the technology type, coal mine emissions, thermal efficiency, and CEF alone without requiring full LCAs. Areas where new research is necessary to ensure accuracy are also discussed.

  18. Harmonic distortion correction in pipelined analog to digital converters

    E-Print Network [OSTI]

    Panigada, Andrea

    2009-01-01

    Background Correction of Harmonic Distortion in PipelinedBackground Correction of Harmonic Distortion in PipelinedADC with 69dB SNDR Enabled by Digital Harmonic Distortion

  19. Harmonic Morphisms from Homogeneous Spaces -Some Existence Theory -

    E-Print Network [OSTI]

    Gudmundsson, Sigmundur

    Harmonic Morphisms from Homogeneous Spaces - Some Existence Theory - Sigmundur Gudmundsson 2014 #12;Harmonic Morphisms Eigenfamilies - Constructions Orthogonal Harmonic Families - Constructions Low-Dimensional Classifications References Outline 1 Harmonic Morphisms Basics Geometric Motivation

  20. Harmonic oscillators in a Snyder geometry

    E-Print Network [OSTI]

    P. Valtancoli

    2013-06-01

    We find that, in presence of the Snyder geometry, the quantization of d isotropic harmonic oscillators can be solved exactly.

  1. A Refined Harmonic Rayleigh--Ritz Procedure and an Explicitly Restarted Refined Harmonic Arnoldi Algorithm #

    E-Print Network [OSTI]

    Jia, Zhongxiao

    A Refined Harmonic Rayleigh--Ritz Procedure and an Explicitly Restarted Refined Harmonic Arnoldi Algorithm # Guizhi Chen + Zhongxiao Jia # Abstract The work is fourfold. First, a refined harmonic Rayleigh--Ritz procedure is proposed, some relationships are established between the refined harmonic Ritz vector

  2. Poisson harmonic forms, Kostant harmonic forms, and the S 1 equivariant cohomology of K/T

    E-Print Network [OSTI]

    Evens, Sam

    Poisson harmonic forms, Kostant harmonic forms, and the S 1 ­equivariant cohomology of K/T Sam Abstract We characterize the harmonic forms on a flag manifold K/T defined by Kostant in 1963 in terms of a Poisson structure. Namely, they are ``Poisson harmonic'' with respect to the so­called Bruhat Poisson

  3. Reduced Harmonic Representation of Partitions

    E-Print Network [OSTI]

    Michalis Psimopoulos

    2011-03-08

    In the present article the reduced integral representation of partitions in terms of harmonic products has been derived first by using hypergeometry and the new concept of fractional sum and secondly by studying the Fourier series of the kernel function appearing in the integral representation. Using the method of induction, a generalization of the theory has also been obtained.

  4. High Harmonic Generation Basic Techniques & Challenges

    E-Print Network [OSTI]

    Budker, Dmitry

    High Harmonic Generation Basic Techniques & Challenges C. Michael R. Greaves #12;Regimes-cycle laser fields #12;Outline · Optical Field Atomic Ionization · High Harmonic Generation (HHG-rays · References #12;Optical Field Atomic Ionization · Harmonics are generated by the tunneling, transport

  5. HARMONIC AND SUPERHARMONIC MAJORANTS ON THE DISK

    E-Print Network [OSTI]

    Thomas, Pascal J.

    HARMONIC AND SUPERHARMONIC MAJORANTS ON THE DISK function on the unit disk admits * *a harmonic majorant if and only if a certain explicit upper D denote the open unit disk in the complex plane, and H+ (D) the cone of positive harmonic

  6. VOLUMETRIC HARMONIC BRAIN MAPPING Yalin Wang1

    E-Print Network [OSTI]

    VOLUMETRIC HARMONIC BRAIN MAPPING Yalin Wang1 , Xianfeng Gu2 , Tony F. Chan1 , Paul M. Thompson3. The first one is to find a harmonic map from a 3 manifold to a 3D solid sphere and the second is a sphere- gest that 3D harmonic mapping of brain volumes to a solid sphere can provide a canonical coordinate

  7. Harmonic oscillator: an analysis via Fourier series

    E-Print Network [OSTI]

    A. S. de Castro

    2013-09-30

    The Fourier series method is used to solve the homogeneous equation governing the motion of the harmonic oscillator. It is shown that the general solution to the problem can be found in a surprisingly simple way for the case of the simple harmonic oscillator. It is also shown that the damped harmonic oscillator is susceptible to the analysis.

  8. Harmonic generation with temporally focused ultrashort pulses

    E-Print Network [OSTI]

    Silberberg, Yaron

    Harmonic generation with temporally focused ultrashort pulses Dan Oron and Yaron Silberberg of harmonic generation with temporally focused ultrashort pulses are explored both theoreti- cally and experimentally. Analyzing the phase-matching conditions for harmonic generation we find a corre- spondence

  9. HARMONIC MORPHISMS, HERMITIAN STRUCTURES AND SYMMETRIC SPACES

    E-Print Network [OSTI]

    Gudmundsson, Sigmundur

    HARMONIC MORPHISMS, HERMITIAN STRUCTURES AND SYMMETRIC SPACES In this text we refer to the following papers by capital letters as indicated. [A] M. Svensson, On holomorphic harmonic morphisms, Manuscripta Math. 107 (2002), 1­13. [B] M. Svensson, Harmonic morphisms from even-dimensional hyper- bolic

  10. HARMONIC MAPS AND INTEGRABLE SYSTEMS EMMA CARBERRY

    E-Print Network [OSTI]

    Sydney, University of

    HARMONIC MAPS AND INTEGRABLE SYSTEMS EMMA CARBERRY Abstract. This article has two purposes. The first is to give an ex- pository account of the integrable systems approach to harmonic maps from surfaces to Lie groups and symmetric spaces, focusing on spectral curves for harmonic 2-tori. The most

  11. Simple Harmonic Motion and Newton's 3rd

    E-Print Network [OSTI]

    Yu, Jaehoon

    Simple Harmonic Motion and Newton's 3rd Law Theory Simple Harmonic Motion is not as simpleperiod where m is the mass of the object in kilograms and k is the spring constant. Newton's 3rd Law Newton's 3rd Law using two Force sensors. Procedure: Simple Harmonic Motion Getting the data 1. Open

  12. spherical harmonics for l < 20

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

    Michael, J. Robert [Middle Tennessee State University; Volkov, Anatoliy [Middle Tennessee State University

    2015-01-23

    The widely used pseudoatom formalism [Stewart (1976). Acta Cryst. A32, 565–574; Hansen & Coppens (1978). Acta Cryst. A34, 909–921] in experimental X-ray charge-density studies makes use of real spherical harmonics when describing the angular component of aspherical deformations of the atomic electron density in molecules and crystals. The analytical form of the densitynormalized Cartesian spherical harmonic functions for up to l 7 and the corresponding normalization coefficients were reported previously by Paturle & Coppens [Acta Cryst. (1988), A44, 6–7]. It was shown that the analytical form for normalization coefficients is available primarily for l 4 [Hansen & Coppens, 1978; Paturle & Coppens, 1988; Coppens (1992). International Tables for Crystallography, Vol. B, Reciprocal space, 1st ed., edited by U. Shmueli, ch. 1.2. Dordrecht: Kluwer Academic Publishers; Coppens (1997). X-ray Charge Densities and Chemical Bonding. New York: Oxford University Press]. Only in very special cases it is possible to derive an analytical representation of the normalization coefficients for 4 4 the density normalization coefficients were calculated numerically to within seven significant figures. In this study we review the literature on the density-normalized spherical harmonics, clarify the existing notations, use the Paturle–Coppens (Paturle & Coppens, 1988) method in the Wolfram Mathematica software to derive the Cartesian spherical harmonics for l 20 and determine the density normalization coefficients to 35 significant figures, and computer-generate a Fortran90 code. The article primarily targets researchers who work in the field of experimental X-ray electron density, but may be of some use to all who are interested in Cartesian spherical harmonics.

  13. An LCA model for waste incineration enhanced with new technologies for metal recovery and application to the case of Switzerland

    SciTech Connect (OSTI)

    Boesch, Michael E.; Vadenbo, Carl; Saner, Dominik; Huter, Christoph; Hellweg, Stefanie

    2014-02-15

    Highlights: • An enhanced process-based LCA model for MSWI is featured and applied in case study. • LCA modeling of recent technological developments for metal recovery from fly ash. • Net release from Swiss MSWI 133 kg CO{sub 2}-eq/tonne waste from attributional LCA perspective. • Net savings from a consequential LCA perspective reach up to 303 kg CO{sub 2}-eq/tonne waste. • Impacts according to ReCiPe and CExD show similar pattern to climate change. - Abstract: A process model of municipal solid waste incinerators (MSWIs) and new technologies for metal recovery from combustion residues was developed. The environmental impact is modeled as a function of waste composition as well as waste treatment and material recovery technologies. The model includes combustion with a grate incinerator, several flue gas treatment technologies, electricity and steam production from waste heat recovery, metal recovery from slag and fly ash, and landfilling of residues and can be tailored to specific plants and sites (software tools can be downloaded free of charge). Application of the model to Switzerland shows that the treatment of one tonne of municipal solid waste results on average in 425 kg CO{sub 2}-eq. generated in the incineration process, and 54 kg CO{sub 2}-eq. accrue in upstream processes such as waste transport and the production of operating materials. Downstream processes, i.e. residue disposal, generates 5 kg CO{sub 2}-eq. Savings from energy recovery are in the range of 67 to 752 kg CO{sub 2}-eq. depending on the assumptions regarding the substituted energy production, while the recovery of metals from slag and fly ash currently results in a net saving of approximately 35 kg CO{sub 2}-eq. A similar impact pattern is observed when assessing the MSWI model for aggregated environmental impacts (ReCiPe) and for non-renewable resource consumption (cumulative exergy demand), except that direct emissions have less and no relevance, respectively, on the total score. The study illustrates that MSWI plants can be an important element of industrial ecology as they provide waste disposal services and can help to close material and energetic cycles.

  14. Second harmonic generation in the moving media

    E-Print Network [OSTI]

    Ghalandari, Mahboubeh

    2015-01-01

    Because of the importance of second harmonic generation in some nonlinear media, in this paper, we investigated induced second harmonic generation in diamond where there is no intrinsic second order susceptibility, X(2). The electric field is proposed to introduce moving susceptibility of the second order and induce second harmonic generation. Then, spatiotemporal (QPM) is applied to optimize the induced second harmonic generation. Numerical results reveals that in this way, the induced second harmonic is found at the frequency of omega (2) = 2 omega(0) + or - Delta omega rather than omega (0).

  15. BMT provides in-house specialists in green building project management

    E-Print Network [OSTI]

    the LCA tools. Energy Simulation BMT can analyse the energy efficiency of buildings and provide advice on building envelop and services systems for more energy efficient development. Energy Use: Typical BuildingBMT provides in-house specialists in green building project management and co

  16. Harmonic Chain with Weak Dissipation

    E-Print Network [OSTI]

    A. A. Lykov; V. A. Malyshev

    2013-02-20

    We consider finite harmonic chain (consisting of N classical particles) plus dissipative force acting on one particle (called dissipating particle) only. We want to prove that "in the generic case" the energy (per particle) for the whole system tends to zero in the large time limit and then in the large N limit. "In the generic case" means: for almost all initial conditions and for almost any choice of the dissipating particle, in the thermodynamic limit.

  17. Hyperspherical harmonic formalism for tetraquarks

    E-Print Network [OSTI]

    J. Vijande; N. Barnea; A. Valcarce

    2006-10-11

    We present a generalization of the hyperspherical harmonic formalism to study systems made of quarks and antiquarks of the same flavor. This generalization is based on the symmetrization of the $N-$body wave function with respect to the symmetric group using the Barnea and Novoselsky algorithm. Our analysis shows that four-quark systems with non-exotic $2^{++}$ quantum numbers may be bound independently of the quark mass. $0^{+-}$ and $1^{+-}$ states become attractive only for larger quarks masses.

  18. Harmonics and Resonance Issues with Wind Plants

    SciTech Connect (OSTI)

    Bradt, M. [IEEE PES Wind Plant Collector System Design Working Group; Badrzadeh, Babak [IEEE PES Wind Plant Collector System Design Working Group; Camm, E H [IEEE PES Wind Plant Collector System Design Working Group; Castillo, Nestor [IEEE PES Wind Plant Collector System Design Working Group; Mueller, David [IEEE PES Wind Plant Collector System Design Working Group; Siebert, T. [IEEE PES Wind Plant Collector System Design Working Group; Schoene, Jens [IEEE PES Wind Plant Collector System Design Working Group; Smith, Travis M [ORNL; Starke, Michael R [ORNL; Walling, R. [IEEE PES Wind Plant Collector System Design Working Group

    2011-01-01

    Wind plants are susceptible to lightly-damped resonances which can attract and amplify ambient grid harmonic distortion and magnify wind turbine harmonic generation. Long-accepted harmonic modeling assumptions and practices are not appropriate for wind plants. VSCs are not ideal current sources and grid impedance is important. Attention to modeling detail and thorough evaluation over range of conditions is critical to meaningful analysis. In general, wind turbines are very slight sources of harmonics. Most harmonic issues are a result of resonance, caused by capacitor banks (for reactive power compensation) or from the extensive underground cabling in a collector system. Converter controls instability can be exacerbated by power system resonances. In some cases this has caused severe voltage distorDon and other problems. The IEEE 519 recommended guidelines are very restrictive. I recommend that they are used to resolve serious harmonic issues, and not to create petty problems.

  19. Power Quality/Harmonic Detection: Harmonic Control in Electric Power Systems for the Telecommunications Industry 

    E-Print Network [OSTI]

    Felkner, L. J.; Waggoner, R. M.

    1993-01-01

    The control of harmonics in power systems continues to be a major concern in the telecommunications industry. AC/DC telecommunication conversion equipment has rarely been thought of as playing a major role in the harmonic interaction problem. Yet...

  20. Harmonic Cheeger-Simons characters with applications

    E-Print Network [OSTI]

    Richard Green; Varghese Mathai

    2009-02-13

    We initiate the study of harmonic Cheeger-Simons characters, with applications to smooth versions of the Geometric Langlands program in the abelian case.

  1. Modulation compression for short wavelength harmonic generation

    E-Print Network [OSTI]

    Qiang, J.

    2010-01-01

    Wavelength Harmonic Generation Ji Qiang Lawrence Berkeleyform a basis for fourth generation light source. Currently,e?ciency was proposed for generation of short wavelength

  2. Harmonic potential and hadron spectroscopy

    E-Print Network [OSTI]

    Rafael Tumanyan

    2009-05-28

    The quark-gluon sea in the hadrons is considered as periodically correlated. Energy levels of Shrodinger equation with harmonic potential is used for describing of the spectrum of hadron masses. In the considered cases the effective potential operating on each particle of ensemble, under certain conditions becomes square-law on displacement from a equilibrium point. It can become an explanation of popularity of oscillator potential for the description of a spectrum of masses of elementary particles. The analysis shows that levels of periodic potential better agreed to the spectrum of hadron masses, than levels of other potentials used for an explanation of a spectrum of masses.

  3. On harmonic measures and group actions Alberto Candel

    E-Print Network [OSTI]

    Candel, Alberto

    On harmonic measures and group actions Alberto Candel CSUN I Congreso Hispano-Franc´es de Matem´aticas Zaragoza, 13 Julio del 2007 #12;Harmonic measures Harmonic measures for foliated spaces were introduced in foliation theory by Lucy Garnett. #12;Harmonic measures Harmonic measures for foliated spaces were

  4. Harmonic relationships influence auditory brainstem encoding of chords

    E-Print Network [OSTI]

    Kraus, Nina

    Harmonic relationships influence auditory brainstem encoding of chords Frederic Marmela, and particularly by sensitivity to harmonic relationships. As subcortical and cortical processing dynamically processing of musical sounds would be sensitive to harmonic relationships. We examined auditory brainstem

  5. HARMONIC MAPPINGS BETWEEN RIEMANNIAN MANIFOLDS Anand Arvind Joshi

    E-Print Network [OSTI]

    Leahy, Richard M.

    HARMONIC MAPPINGS BETWEEN RIEMANNIAN MANIFOLDS by Anand Arvind Joshi A Thesis Presented ii Abstract iv 1 Harmonic Mappings 1 1.1 Space of Maps Variation Formula . . . . . . . . . . . . . . . . . . . . . . . . 11 1.4 Harmonic Maps

  6. A Formal model to aid documenting and harmonizing of information

    E-Print Network [OSTI]

    Zheng, Yuliang

    A Formal model to aid documenting and harmonizing of information security requirements Jussipekka Information security development, harmonization of information security, organizational modeling 1 INTRODUCTION A formal top down model to harmonize and document information security requirements shall

  7. Current Generated Harmonics and Their Effect Upon Electrical Industrial Systems 

    E-Print Network [OSTI]

    Alexander, H. R.; Rogge, D. S.

    1995-01-01

    This paper provides a general overview of harmonics and addresses the causes of current generated harmonics in electrical systems. In addition, problems caused by current generated harmonics and their affects upon different ...

  8. Harmonic cascade FEL designs for LUX

    E-Print Network [OSTI]

    2004-01-01

    1.3: a fully 3D time-dependent FEL sim- ulation code, Nucl.a XUV/soft X-ray harmonic-cascade FEL for the proposed LBNLLBNL-56329 Harmonic cascade FEL designs for LUX G. Penn, M.

  9. VOLUMETRIC HARMONIC BRAIN MAPPING Yalin Wang1

    E-Print Network [OSTI]

    Ferguson, Thomas S.

    VOLUMETRIC HARMONIC BRAIN MAPPING Yalin Wang1 , Xianfeng Gu2 , Tony F. Chan1 , Paul M. Thompson3 general investigation of 3D volumetric brain har- monic mapping. The motivations for 3D volumetric brain volumetric harmonic map- ping algorithm. The algorithm can work with manifolds with genus zero and non genus

  10. Observation of the Second Harmonic in Thomson Scattering from...

    Office of Scientific and Technical Information (OSTI)

    Observation of the Second Harmonic in Thomson Scattering from Relativistic Electrons Citation Details In-Document Search Title: Observation of the Second Harmonic in Thomson...

  11. Extra Harmonic Vowel in Chicahuaxtla Trique

    E-Print Network [OSTI]

    Matsukawa, Kosuke

    2008-01-01

    stream_size 17328 stream_content_type text/plain stream_name kwpl-30-Matsukawa.pdf.txt stream_source_info kwpl-30-Matsukawa.pdf.txt Content-Encoding UTF-8 Content-Type text/plain; charset=UTF-8 Extra Harmonic Vowel... harmonic vowel is added after a laryngealized vowel (either a glottalized vowel or an aspirated vowel) in a final syllable. The extra harmonic vowel does not exist in Copala Trique or Itunyoso Trique and is attached mostly to noun stems in Chicahuaxtla...

  12. Conjugate Harmonic Functions and Clifford Craig A. Nolder

    E-Print Network [OSTI]

    Conjugate Harmonic Functions and Clifford Algebras Craig A. Nolder Department of Mathematics a Hardy-Littlewood inequality and a Privalov inequality for conju- gate harmonic functions in the plane], Stein and Weiss studied systems of conjugate harmonic functions in Rn . These are vectors of harmonic

  13. Dual aperture dipole magnet with second harmonic component

    DOE Patents [OSTI]

    Praeg, W.F.

    1983-08-31

    An improved dual aperture dipole electromagnet includes a second-harmonic frequency magnetic guide field winding which surrounds first harmonic frequency magnetic guide field windings associated with each aperture. The second harmonic winding and the first harmonic windings cooperate to produce resultant magnetic waveforms in the apertures which have extended acceleration and shortened reset portions of electromagnet operation.

  14. High harmonic generation in the relativistic *, A. GOPAL2

    E-Print Network [OSTI]

    Loss, Daniel

    LETTERS High harmonic generation in the relativistic limit B. DROMEY1 , M. ZEPF1 *, A. GOPAL2 , K, measurements with unprecedented temporal resolution1­6 . Harmonics from laser­solid target interactions have of harmonic efficiency to high orders by driving harmonic production to the relativistic limit1 . Here we

  15. Dual aperture dipole magnet with second harmonic component

    DOE Patents [OSTI]

    Praeg, Walter F. (Palos Park, IL)

    1985-01-01

    An improved dual aperture dipole electromagnet includes a second-harmonic frequency magnetic guide field winding which surrounds first harmonic frequency magnetic guide field windings associated with each aperture. The second harmonic winding and the first harmonic windings cooperate to produce resultant magnetic waveforms in the apertures which have extended acceleration and shortened reset portions of electromagnet operation.

  16. Local Harmonic Estimation in Musical Sound Rafael A. IRIZARRY

    E-Print Network [OSTI]

    Irizarry, Rafael A.

    Local Harmonic Estimation in Musical Sound Signals Rafael A. IRIZARRY Statistical modeling so a local harmonic model that tracks changes in pitch and in the amplitudes of the harmonics is fit estimates of the harmonic signal and of the noise signal. Different musical composition applications may

  17. Topics in affine and discrete harmonic analysis 

    E-Print Network [OSTI]

    Hickman, Jonathan Edward

    2015-07-01

    In this thesis a number of problems in harmonic analysis of a geometric flavour are discussed and, in particular, the Lebesgue space mapping properties of certain averaging and Fourier restriction operators are studied. ...

  18. Harmonic Representation of Combinations and Partitions

    E-Print Network [OSTI]

    Michalis Psimopoulos

    2011-03-01

    In the present article a new method of deriving integral representations of combinations and partitions in terms of harmonic products has been established. This method may be relevant to statistical mechanics and to number theory.

  19. Harmonizing Systems and Software Cost Estimation

    E-Print Network [OSTI]

    Wang, Gan

    2009-07-19

    The objective of this paper is to examine the gaps and overlaps between software and systems engineering cost models with intent to harmonize the estimates in engineering engineering estimation. In particular, we evaluate ...

  20. Harmonic Lasing Characterization at Jefferson Lab

    SciTech Connect (OSTI)

    Stephen Benson; Michelle D. Shinn

    2006-08-27

    Harmonic lasing is normally suppressed because of lasing at the fundamental wavelength. It can, however, be achieved by using any of several methods that suppress fundamental lasing. In this paper we discuss two methods used at Jefferson Lab. The first is to use the characteristics of dielectric coatings to allow harmonic lasing at cavity lengths longer than the synchronous length for the fundamental. The second is to use a dielectric coating that has little reflectivity at the fundamental. This allows us to directly compare fundamental and harmonic lasing with the same optical resonator and electron beam. We present measurement carried out at Jefferson Lab using the IR Upgrade FEL operating at 0.53, 0.94, 1.04, 1.6, and 2.8 microns in which both schemes are used to produce lasing at both the 3rd and 5th harmonic of the fundamental.

  1. SEVENTH HARMONIC 20 GHz CO-GENERATOR

    SciTech Connect (OSTI)

    Hirshfield, Jay L

    2014-04-08

    To satisfy the need for multi-MW rf sources in frequency ranges where commercial sources do not exist, a study was undertaken on a class of devices based on gyro-harmonic frequency multiplication. This mechanism relies upon adding energy in gyrating motion to a linear electron beam that traverses a rotating-mode TE111-mode drive cavity in a dc magnetic field. The beam then drifts along the magnetic field into a second cavity, operating in the TEn11-mode tuned to the nth harmonic of the drive cavity. Studies of this configuration have been carried out for 2 < n < 7. Results are given for multi-MW, efficient operation of a 7th harmonic device operating at 20 GHz, and a 2nd harmonic device operating at 22.4 GHz.

  2. Harmonic experiments to model fracture induced anisotropy

    E-Print Network [OSTI]

    Santos, Juan

    of earthquakes, and hydrocarbon and geothermal reservoirs are mainly composed of fractured rocks. Harmonic and vertical coordinates, respectively. When a dense set of parallel fractures is present, the medium behaves

  3. Index calculation by means of harmonic expansion

    E-Print Network [OSTI]

    Imamura, Yosuke

    2015-01-01

    We review derivation of superconformal indices by means of supersymmetric localization and spherical harmonic expansion for 3d N=2, 4d N=1, and 6d N=(1,0) supersymmetric gauge theories. We demonstrate calculation of indices for vector multiplets in each dimensions by analysing energy eigenmodes in S^pxR. For the 6d index we consider the perturbative contribution only. We put focus on technical details of harmonic expansion rather than physical applications.

  4. Index calculation by means of harmonic expansion

    E-Print Network [OSTI]

    Yosuke Imamura

    2015-10-28

    We review derivation of superconformal indices by means of supersymmetric localization and spherical harmonic expansion for 3d N=2, 4d N=1, and 6d N=(1,0) supersymmetric gauge theories. We demonstrate calculation of indices for vector multiplets in each dimensions by analysing energy eigenmodes in S^pxR. For the 6d index we consider the perturbative contribution only. We put focus on technical details of harmonic expansion rather than physical applications.

  5. Nonlinearly driven harmonics of Alfvén modes

    SciTech Connect (OSTI)

    Zhang, B., E-mail: bozhang@austin.utexas.edu; Breizman, B. N.; Zheng, L. J.; Berk, H. L. [Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (United States)] [Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (United States)

    2014-01-15

    In order to study the leading order nonlinear magneto-hydrodynamic (MHD) harmonic response of a plasma in realistic geometry, the AEGIS code has been generalized to account for inhomogeneous source terms. These source terms are expressed in terms of the quadratic corrections that depend on the functional form of a linear MHD eigenmode, such as the Toroidal Alfvén Eigenmode. The solution of the resultant equation gives the second order harmonic response. Preliminary results are presented here.

  6. Some examples of exponentially harmonic maps

    E-Print Network [OSTI]

    A D Kanfon; A Füzfa; D Lambert

    2002-05-15

    The aim of this paper is to study some examples of exponentially harmonic maps. We study such maps firstly on flat euclidean and Minkowski spaces and secondly on Friedmann-Lema\\^ itre universes. We also consider some new models of exponentially harmonic maps which are coupled with gravity which happen to be based on a generalization of the lagrangian for bosonic strings coupled with dilatonic field.

  7. LCA-IWM: A decision support tool for sustainability assessment of waste management systems

    SciTech Connect (OSTI)

    Boer, J. den [Institute of Water Supply and Groundwater Protection, Wastewater Technology, Waste Management, Industrial Material Cycles, Environmental and Spatial Planning (Institute WAR), Technische Universitaet Darmstadt, Petersenstr. 13, 64287 Darmstadt (Germany)], E-mail: j.denboer@iwar.tu-darmstadt.de; Boer, E. den; Jager, J. [Institute of Water Supply and Groundwater Protection, Wastewater Technology, Waste Management, Industrial Material Cycles, Environmental and Spatial Planning (Institute WAR), Technische Universitaet Darmstadt, Petersenstr. 13, 64287 Darmstadt (Germany)

    2007-07-01

    The paper outlines the most significant result of the project 'The use of life cycle assessment tools for the development of integrated waste management strategies for cities and regions with rapid growing economies', which was the development of two decision-support tools: a municipal waste prognostic tool and a waste management system assessment tool. The article focuses on the assessment tool, which supports the adequate decision making in the planning of urban waste management systems by allowing the creation and comparison of different scenarios, considering three basic subsystems: (i) temporary storage; (ii) collection and transport and (iii) treatment, disposal and recycling. The design and analysis options, as well as the assumptions made for each subsystem, are shortly introduced, providing an overview of the applied methodologies and technologies. The sustainability assessment methodology used in the project to support the selection of the most adequate scenario is presented with a brief explanation of the procedures, criteria and indicators applied on the evaluation of each of the three sustainability pillars.

  8. LCA (Life Cycle Assessment) of Parabolic Trough CSP: Materials Inventory and Embodied GHG Emissions from Two-Tank Indirect and Thermocline Thermal Storage (Presentation)

    SciTech Connect (OSTI)

    Heath, G.; Burkhardt, J.; Turchi, C.; Decker, T.; Kutscher, C.

    2009-07-20

    In the United States, concentrating solar power (CSP) is one of the most promising renewable energy (RE) technologies for reduction of electric sector greenhouse gas (GHG) emissions and for rapid capacity expansion. It is also one of the most price-competitive RE technologies, thanks in large measure to decades of field experience and consistent improvements in design. One of the key design features that makes CSP more attractive than many other RE technologies, like solar photovoltaics and wind, is the potential for including relatively low-cost and efficient thermal energy storage (TES), which can smooth the daily fluctuation of electricity production and extend its duration into the evening peak hours or longer. Because operational environmental burdens are typically small for RE technologies, life cycle assessment (LCA) is recognized as the most appropriate analytical approach for determining their environmental impacts of these technologies, including CSP. An LCA accounts for impacts from all stages in the development, operation, and decommissioning of a CSP plant, including such upstream stages as the extraction of raw materials used in system components, manufacturing of those components, and construction of the plant. The National Renewable Energy Laboratory (NREL) is undertaking an LCA of modern CSP plants, starting with those of parabolic trough design.

  9. Harmonic Functions are Real Analytic1 On this very short note we prove that harmonic functions are real analytic functions.

    E-Print Network [OSTI]

    Cabral, Marco

    Harmonic Functions are Real Analytic1 On this very short note we prove that harmonic functions prove Lemma 1 using the mean value property of harmonic functions, Green's theorem and the maximum principle. Lemma 1 (estimate on first derivative) Suppose w is harmonic in Rn , > 0, y and B

  10. Cascaded third harmonic generation in hybrid graphene-semiconductor waveguides

    E-Print Network [OSTI]

    Smirnova, Daria A

    2015-01-01

    We study cascaded harmonic generation of hybrid surface plasmons in integrated planar waveguides composed of a graphene layer and a doped-semiconductor slab. We derive a comprehensive model of cascaded third harmonic generation through phase-matched nonlinear interaction of fundamental, second harmonic and third harmonic plasmonic modes supported by the structure. We show that hybrid graphene-semiconductor waveguides can simultaneously phase-match these three interacting harmonics, increasing the total third-harmonic output by a factor of 5 compared to the non-cascaded regime.

  11. On the symplectic structure of harmonic superspace

    SciTech Connect (OSTI)

    Kachkachi, M.; Saidi, E.H. (Lab. de Physique Theorique, Faculte des Sciences, Av. Ibn Battota, B.P. 1014, Rabat (Morocco))

    1992-11-10

    In this paper, the symplectic properties of harmonic superspace are studied. It is shown that Diff(S[sup 2]) is isomorphic to Diff[sub 0](S[sup 3])/Ab(Diff[sub 0](S[sup 3])), where Diff[sub 0](S[sup 3]) is the group of the diffeomorphisms of S[sup 3] preserving the Cartan charge operator D[sup 0] and Ab(Diff[sub 0](S[sup 3])) is its Abelian subgroup generated by the Cartan vectors L[sub 0] = w[sup 0]D[sup 0]. The authors show also that the eigenvalue equation D[sup 0] [lambda](z) = 0 defines a symplectic structure in harmonic superspace, and the authors calculate the corresponding algebra. The general symplectic invariant coupling of the Maxwell prepotential is constructed in both flat and curved harmonic superspace. Other features are discussed.

  12. High harmonic phase in molecular nitrogen

    SciTech Connect (OSTI)

    McFarland, Brian K.

    2009-10-17

    Electronic structure in atoms and molecules modulates the amplitude and phase of high harmonic generation (HHG). We report measurements of the high harmonic spectral amplitude and phase in N{sub 2}. The phase is measured interferometrically by beating the N{sub 2} harmonics with those of an Ar reference oscillator in a gas mixture. A rapid phase shift of 0.2{pi} is observed in the vicinity of the HHG spectral minimum, where a shift of {pi} had been presumed [J. Itatani et al., Nature 432, 867 (2004)]. We compare the phase measurements to a simulation of the HHG recombination step in N{sub 2} that is based on a simple interference model. The results of the simulation suggest that modifications beyond the simple interference model are needed to explain HHG spectra in molecules.

  13. ESCUELA TCNICA SUPERIOR Using Spherical Harmonic Virtual Screening Tools

    E-Print Network [OSTI]

    Ritchie, Dave

    energy ­ EAL ­ electron affinity ­ L ­ polarizability · Encode as Spherical Harmonic expansions to order

  14. Parametric Estimation of Harmonically Related Sinusoids 

    E-Print Network [OSTI]

    Dixit, Richa

    2010-04-01

    Mud-pulse telemetry is a method used for measurement-while-drilling (MWD)in the oil industry. The telemetry signals are corrupted by spurious mud pump noise consisting of a large number of harmonically related sinusoids. In order to denoise...

  15. A Low Total Harmonic Distortion Sinusoidal Oscillator Based on Digital Harmonic Cancellation Technique 

    E-Print Network [OSTI]

    Yan, Jun

    2012-07-16

    design methodology of sinusoidal oscillator named digital-harmonic-cancellation (DHC) technique is presented. DHC technique is realized by summing up a set of square-wave signals with different phase shifts and different summing coefficient to cancel...

  16. Harmonic influence in large-scale networks Daron Acemoglu

    E-Print Network [OSTI]

    Como, Giacomo

    Harmonic influence in large-scale networks Daron Acemoglu , Giacomo Como , Fabio Fagnani , and Asuman Ozdaglar§ 1. INTRODUCTION Harmonic influence has been recently introduced as a measure = 0 and xs1 = 1, respectively, the harmonic influence vector x measures the relative influence of s1

  17. Harmonic maps on domains with piecewise Lipschitz continuous metrics

    E-Print Network [OSTI]

    Wang, Changyou

    Harmonic maps on domains with piecewise Lipschitz continuous metrics Haigang Li , Changyou Wang consider harmonic map from (, g) to a compact Rie- mannian manifold (N, h) Rk without boundary. We generalize the notion of stationary harmonic maps and prove their partial regularity. We also discuss

  18. Harmonic Functions for Quadrilateral Remeshing of Arbitrary Manifolds

    E-Print Network [OSTI]

    Garland, Michael

    Harmonic Functions for Quadrilateral Remeshing of Arbitrary Manifolds S. Dong , S. Kircher, M on the use of smooth harmonic scalar fields defined over the mesh. Given such a field, we compute its for cutting the surface into patches. Key words: quad-dominant remeshing, gradient flow tracing, harmonic

  19. Harmonic Balance, Melnikov Method and Nonlinear Oscillators Under Resonant Perturbation

    E-Print Network [OSTI]

    Bonnin, Michele

    Harmonic Balance, Melnikov Method and Nonlinear Oscillators Under Resonant Perturbation Michele of the unperturbed system. On the other hand, spectral techniques, like the Harmonic Balance, have been widely's integral over the Harmonic Balance approximation of the unperturbed orbits. The proposed method

  20. harmonic generation at a critical power in inhomogeneous doubly

    E-Print Network [OSTI]

    Soljaèiæ, Marin

    (2) and (3) harmonic generation at a critical power in inhomogeneous doubly resonant cavities- and third-harmonic generation via (2) and (3) nonlinearities. We find that conversion efficiency. Drummond, K. J. McNeil, and D. F. Walls, "Non-equilibrium transitions in sub/second harmonic generation I

  1. Harmonic Elimination for Multilevel Converter with Programmed PWM Method

    E-Print Network [OSTI]

    Tolbert, Leon M.

    Harmonic Elimination for Multilevel Converter with Programmed PWM Method Zhong Du, Leon M. Tolbert presents a programmed PWM method to eliminate specific higher order harmonics of multilevel converters. First, resultant theory is applied to transcendental equations to eliminate low order harmonics

  2. Harmonic Analysis and Geometries of Digital Data Bases

    E-Print Network [OSTI]

    Maggioni, Mauro

    Harmonic Analysis and Geometries of Digital Data Bases AMS Session Special Sesson, 2010 () Harmonic Analysis of Data Bases January 14, 2010 1 / 41 #12;Local geometry described by a graph, Gavish) Harmonic Analysis of Data Bases January 14, 2010 2 / 41 #12;Local geometry described by a graph

  3. High harmonic generation and attosecond pulse production in dense medium

    E-Print Network [OSTI]

    Becker, Andreas

    High harmonic generation and attosecond pulse production in dense medium v.v. Stre1kov1'2', V ABSTRACT We have studied the high harmonic generation and attosecond pulse production in a plasma or gas positions of the particles using the Monte-Carlo method. We observe a change of the harmonic properties due

  4. The harmonic measure of balls in random trees Nicolas Curien

    E-Print Network [OSTI]

    Le Gall, Jean-François

    The harmonic measure of balls in random trees Nicolas Curien and Jean-François Le Gall Abstract We study properties of the harmonic measure of balls in typical large discrete trees. For a ball of radius of the harmonic measure is supported on a boundary set of size approximately equal to n , where 0

  5. Harmonic Broadcasting Is Bandwidth-Optimal Assuming Constant Bit Rate

    E-Print Network [OSTI]

    Sudan, Madhu

    Harmonic Broadcasting Is Bandwidth-Optimal Assuming Constant Bit Rate Lars Engebretsen1, and Madhu Street Cambridge, Massachusetts 02139 USA E-mail: madhu@mit.edu November 2005 Abstract. Harmonic for video-on-demand broadcasting. In this paper, we note that harmonic broadcasting is actually a spe- cial

  6. The Harmonic Oscillator and the Uncertainty Principle Frank Rioux

    E-Print Network [OSTI]

    Rioux, Frank

    The Harmonic Oscillator and the Uncertainty Principle Frank Rioux Emeritus Professor of Chemistry CSB|SJU Schrödinger's equation in atomic units (h = 2) for the harmonic oscillator has an exact is that tunneling occurs in the simple harmonic oscillator. The classical turning point is that position at which

  7. The Harmonic Series Diverges Again and Again Steven J. Kifowit

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    The Harmonic Series Diverges Again and Again Steven J. Kifowit Prairie State College Terra A. Stamps Prairie State College The harmonic series, n=1 1 n = 1 + 1 2 + 1 3 + 1 4 + 1 5 + · · · , is one, the harmonic series provides the instructor with a wealth of opportunities. The leaning tower of lire (Johnson

  8. Comparing Harmonic Similarity Measures W. Bas de Haas1

    E-Print Network [OSTI]

    Veltkamp, Remco

    Comparing Harmonic Similarity Measures W. Bas de Haas1 , Matthias Robine2 , Pierre Hanna2 , Remco C in which we compare two harmonic similarity measures. In contrast to earlier work, in this paper we approach to harmonic similarity, and measure the effects of chord descrip- tion detail and a priori key

  9. Tomography of high harmonic generation in a cluster jet

    E-Print Network [OSTI]

    . In this Letter, we present a tomographic tech- nique for studying high harmonic generation in cluster jetsTomography of high harmonic generation in a cluster jet Chih-Hao Pai Department of Physics; accepted December 21, 2005; posted January 4, 2006 (Doc. ID 66558) Tomographic measurement of high harmonic

  10. Technical Section Feature-aligned harmonic volumetric mapping using MFS

    E-Print Network [OSTI]

    Li, Xin "Shane"

    Technical Section Feature-aligned harmonic volumetric mapping using MFS Xin Li a,b,Ã, Huanhuan Xu a Correspondence and registration Harmonic volumetric mapping a b s t r a c t We present an efficient adaptive method to compute the harmonic volumetric mapping, which establishes a smooth correspondence between two

  11. SRS Tank 48H Waste Treatment Project Technology Readiness Assessment

    Office of Environmental Management (EM)

    Savannah River Site Tank 48H Waste Treatment Project Technology Readiness Assessment Harry D. Harmon Joan B. Berkowitz John C. DeVine, Jr. Herbert G. Sutter Joan K. Young...

  12. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Weicen Wang

    E-Print Network [OSTI]

    ­ the UBC LCA Project ­ which aims to support the development of the field of life cycle assessment (LCA

  13. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Nick Gaguano

    E-Print Network [OSTI]

    ­ the UBC LCA Project ­ which aims to support the development of the field of life cycle assessment (LCA

  14. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Devon Brownlee

    E-Print Network [OSTI]

    ­ the UBC LCA Project ­ which aims to support the development of the field of life cycle assessment (LCA

  15. Generalized harmonic formulation in spherical symmetry

    E-Print Network [OSTI]

    Evgeny Sorkin; Matthew W. Choptuik

    2010-04-30

    In this pedagogically structured article, we describe a generalized harmonic formulation of the Einstein equations in spherical symmetry which is regular at the origin. The generalized harmonic approach has attracted significant attention in numerical relativity over the past few years, especially as applied to the problem of binary inspiral and merger. A key issue when using the technique is the choice of the gauge source functions, and recent work has provided several prescriptions for gauge drivers designed to evolve these functions in a controlled way. We numerically investigate the parameter spaces of some of these drivers in the context of fully non-linear collapse of a real, massless scalar field, and determine nearly optimal parameter settings for specific situations. Surprisingly, we find that many of the drivers that perform well in 3+1 calculations that use Cartesian coordinates, are considerably less effective in spherical symmetry, where some of them are, in fact, unstable.

  16. Harmonic oscillator model for the helium atom

    E-Print Network [OSTI]

    Carlsen, Martin

    2015-01-01

    A harmonic oscillator model in four dimensions is presented for the helium atom to estimate the distance to the inner and outer electron from the nucleus, the angle between electrons and the energy levels. The method is algebraic and is not based on the choice of correct trial wave function. Three harmonic oscillators and thus three quantum numbers are sufficient to describe the two-electron system. We derive a simple formula for the energy in the general case and in the special case of the Wannier Ridge. For a set of quantum numbers the distance to the electrons and the angle between the electrons are uniquely determined as the intersection between three surfaces. We show that the excited states converge either towards ionization thresholds or towards extreme parallel or antiparallel states and provide an estimate of the ground state energy.

  17. Prolate spheroidal harmonic expansion of gravitational field

    SciTech Connect (OSTI)

    Fukushima, Toshio, E-mail: Toshio.Fukushima@nao.ac.jp [National Astronomical Observatory, Ohsawa, Mitaka, Tokyo 181-8588 (Japan)

    2014-06-01

    As a modification of the oblate spheroidal case, a recursive method is developed to compute the point value and a few low-order derivatives of the prolate spheroidal harmonics of the second kind, Q{sub nm} (y), namely the unnormalized associated Legendre function (ALF) of the second kind with its argument in the domain, 1 < y < ?. They are required in evaluating the prolate spheroidal harmonic expansion of the gravitational field in addition to the point value and the low-order derivatives of P-bar {sub nm}(t), the 4? fully normalized ALF of the first kind with its argument in the domain, |t| ? 1. The new method will be useful in the gravitational field computation of elongated celestial objects.

  18. ${\\cal D}$-deformed harmonic oscillators

    E-Print Network [OSTI]

    F. Bagarello; F. Gargano; D. Volpe

    2014-12-30

    We analyze systematically several deformations arising from two-dimensional harmonic oscillators which can be described in terms of $\\cal{D}$-pseudo bosons. They all give rise to exactly solvable models, described by non self-adjoint hamiltonians whose eigenvalues and eigenvectors can be found adopting the quite general framework of the so-called $\\cal{D}$-pseudo bosons. In particular, we show that several models previously introduced in the literature perfectly fit into this scheme.

  19. Harmon, Illinois: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainableGlynnMassachusetts: EnergySoftware IncHarmon, Illinois: Energy Resources

  20. Dark-matter harmonics beyond annual modulation

    SciTech Connect (OSTI)

    Lee, Samuel K.; Lisanti, Mariangela; Safdi, Benjamin R. E-mail: mlisanti@princeton.edu

    2013-11-01

    The count rate at dark-matter direct-detection experiments should modulate annually due to the motion of the Earth around the Sun. We show that higher-frequency modulations, including daily modulation, are also present and in some cases are nearly as strong as the annual modulation. These higher-order modes are particularly relevant if (i) the dark matter is light, O(10) GeV, (ii) the scattering is inelastic, or (iii) velocity substructure is present; for these cases, the higher-frequency modes are potentially observable at current and ton-scale detectors. We derive simple expressions for the harmonic modes as functions of the astrophysical and geophysical parameters describing the Earth's orbit, using an updated expression for the Earth's velocity that corrects a common error in the literature. For an isotropic halo velocity distribution, certain ratios of the modes are approximately constant as a function of nuclear recoil energy. Anisotropic distributions can also leave observable features in the harmonic spectrum. Consequently, the higher-order harmonic modes are a powerful tool for identifying a potential signal from interactions with the Galactic dark-matter halo.

  1. Blanc, I., Beloin-Saint-Pierre, D., Payet, J., Jacquin, P., Adra, N., Mayer, D., Espace-PV: key sensitive parameters for environmental impacts of grid-connected PV systems with LCA , In Proceedings of the 23rd

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Blanc, I., Beloin-Saint-Pierre, D., Payet, J., Jacquin, P., Adra, N., Mayer, D., « Espace-PV: key sensitive parameters for environmental impacts of grid-connected PV systems with LCA », In Proceedings-936338-24-8, pp. 3779-3781. DOI: 10.4229/23rdEUPVSEC2008-6DV.5.9 ESPACE-PV: KEY SENSITIVE PARAMETERS

  2. Algal Supply System Design - Harmonized Version

    SciTech Connect (OSTI)

    Abodeely, Jared; Stevens, Daniel; Ray, Allison; Newby, Deborah; Schaller, Kastli

    2013-03-01

    The objective of this design report is to provide an assessment of current technologies used for production, dewatering, and converting microalgae cultivated in open-pond systems to biofuel. The original draft design was created in 2011 and has subsequently been brought into agreement with the DOE harmonized model. The design report extends beyond this harmonized model to discuss some of the challenges with assessing algal production systems, including the ability to (1) quickly assess alternative algal production system designs, (2) assess spatial and temporal variability, and (3) perform large-scale assessments considering multiple scenarios for thousands of potential sites. The Algae Logistics Model (ALM) was developed to address each of these limitations of current modeling efforts to enable assessment of the economic feasibility of algal production systems across the United States. The (ALM) enables (1) dynamic assessments using spatiotemporal conditions, (2) exploration of algal production system design configurations, (3) investigation of algal production system operating assumptions, and (4) trade-off assessments with technology decisions and operating assumptions. The report discusses results from the ALM, which is used to assess the baseline design determined by harmonization efforts between U.S. DOE national laboratories. Productivity and resource assessment data is provided by coupling the ALM with the Biomass Assessment Tool developed at PNNL. This high-fidelity data is dynamically passed to the ALM and used to help better understand the impacts of spatial and temporal constraints on algal production systems by providing a cost for producing extracted algal lipids annually for each potential site.

  3. Numerical Verification of Bounce Harmonic Resonances in Neoclassical...

    Office of Scientific and Technical Information (OSTI)

    Numerical Verification of Bounce Harmonic Resonances in Neoclassical Toroidal Viscosity for Tokamaks Citation Details In-Document Search Title: Numerical Verification of Bounce...

  4. Harmonic analysis of music using combinatory categorial grammar 

    E-Print Network [OSTI]

    Granroth-Wilding, Mark Thomas; Wilding, Mark Thomas Granroth

    2013-11-28

    Various patterns of the organization of Western tonal music exhibit hierarchical structure, among them the harmonic progressions underlying melodies and the metre underlying rhythmic patterns. Recognizing these structures ...

  5. A Massively Parallel Solver for the Mechanical Harmonic Analysis...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: A Massively Parallel Solver for the Mechanical Harmonic Analysis of Accelerator Cavities Citation Details In-Document Search Title: A Massively Parallel Solver...

  6. Two dipolar atoms in a harmonic trap

    E-Print Network [OSTI]

    O?dziejewski, Rafa?; Rz??ewski, Kazimierz

    2015-01-01

    Two identical dipolar atoms moving in a harmonic trap without an external magnetic field are investigated. Using the algebra of angular momentum a semi - analytical solutions are found. We show that the internal spin - spin interactions between the atoms couple to the orbital angular momentum causing an analogue of Einstein - de Haas effect. We show a possibility of adiabatically pumping our system from the s-wave to the d-wave relative motion. The effective spin-orbit coupling occurs at anti-crossings of the energy levels.

  7. Harmonic-Oscillator-Based Effective Theory

    E-Print Network [OSTI]

    W. C. Haxton

    2006-08-06

    I describe harmonic-oscillator-based effective theory (HOBET) and explore the extent to which the effects of excluded higher-energy oscillator shells can be represented by a contact-gradient expansion in next-to-next-to-leading order (NNLO). I find the expansion can be very successful provided the energy dependence of the effective interaction, connected with missing long-wavelength physics associated with low-energy breakup channels, is taken into account. I discuss a modification that removes operator mixing from HOBET, simplifying the task of determining the parameters of an NNLO interaction.

  8. Efficient dynamic synchronous machine simulation with harmonics

    SciTech Connect (OSTI)

    Haskew, T.A.; Stern, H.P.; Chen, Z. [Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Electrical Engineering] [Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Electrical Engineering

    1996-06-01

    Within this paper, an efficient procedure for the dynamic simulation of faulted synchronous machines operating in the presence of harmonics is presented. The algorithm employs steady-state frequency domain techniques for simulation of the transmission system sequence networks and time domain methods for the synchronous machines represented in the odq frame of reference. The procedure affords greater accuracy than conventional fault analysis techniques based strictly on steady-state methods, yet requires far less computational time than full system dynamic simulations such as those using the EMTP.

  9. repulsion and quantization in almost-harmonic maps, and asymptotics of the harmonic map flow

    E-Print Network [OSTI]

    Topping, Peter

    .2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2 Almost-harmonic maps - the proof of Theorem 1.2 13 2.1 Basic technology Topping #3; Abstract We present an analysis of bounded-energy low-tension maps between 2-spheres, we show that we can establish a `quantization estimate' which constrains the energy of the map to lie

  10. DIRAC-HARMONIC MAPS FROM INDEX THEORY BERND AMMANN AND NICOLAS GINOUX

    E-Print Network [OSTI]

    Ammann, Bernd

    DIRAC-HARMONIC MAPS FROM INDEX THEORY BERND AMMANN AND NICOLAS GINOUX Abstract. We prove existence results for Dirac-harmonic maps using index theoretical tools is a harmonic map. Contents 1. Introduction

  11. Harmonic tori in symmetric spaces and commuting Hamiltonian systems on loop algebras

    E-Print Network [OSTI]

    Harmonic tori in symmetric spaces and commuting Hamiltonian Introduction Background The study of harmonic maps of compact Riemann surfaces into symmetric spaces ca surfaces are (conformal) harmonic maps while constant mean* * curvature surfaces, constant Gauss curvature

  12. Labial Harmonic Shift in Kazakh: Mapping the Pathways and Motivations for Decay

    E-Print Network [OSTI]

    McCollum, Adam G

    2015-01-01

    307 Labial Harmonic Shift in Kazakh: Mapping the Pathwayson Phonology. Labial Harmonic Shift in Kazakh Harrison, K.pp. 603-650. Labial Harmonic Shift in Kazakh Walker, Rachel

  13. Design study of the bending sections between harmonic cascade FEL stages

    E-Print Network [OSTI]

    Wan, Weishi; Corlett, John; Fawley, William; Zholents, A.

    2004-01-01

    A XUV/Soft X-Ray Harmonic- Cascade FEL for the Proposed LBNLin a Cascaded Harmonic FEL CBP Tech Note-281, Februarybetween Harmonic Cascade FEL Stages W. Wan, J. Corlett, W.

  14. Partition Function of the Harmonic Oscillator on a Noncommutative Plane

    E-Print Network [OSTI]

    I. Jabbari; A. Jahan; Z. Riazi

    2015-07-07

    We derive the partition function of the one-body and two-body systems of classical noncommutative harmonic oscillator in two dimensions. Then, we employ the path integral approach to the quantum noncommutative harmonic oscillator and derive the partition function of the both systems at finite temperature.

  15. Fourier's Law for a Harmonic Crystal with Selfconsistent Stochastic Reservoirs

    E-Print Network [OSTI]

    Roma "La Sapienza", Università di

    Fourier's Law for a Harmonic Crystal with Self­consistent Stochastic Reservoirs Federico Bonetto. The corresponding heat cur­ rent satisfies Fourier's law with a finite positive thermal conductivity which can also words: Fourier's law; harmonic crystal; non­equilibrium systems; ther­ modynamic limit; Green

  16. Second-harmonic generation in nonlinear left-handed metamaterials

    E-Print Network [OSTI]

    Second-harmonic generation in nonlinear left-handed metamaterials Ilya V. Shadrivov, Alexander A August 21, 2005 We study the second-harmonic generation (SHG) in left-handed metamaterials that this novel parametric process can convert a surface of the left-handed metamaterial into an effective mirror

  17. Enhancing tidal harmonic analysis: Robust (hybrid L1 ) solutions

    E-Print Network [OSTI]

    Hickey, Barbara

    Enhancing tidal harmonic analysis: Robust (hybrid L1 =L2 ) solutions Keith E. Leffler Ã, David A 24 February 2008 Accepted 28 April 2008 Keywords: Tides Tidal analysis Harmonic analysis Robust is calculated from the power spectrum of the residual, a calculation that filters broad spectrum noise

  18. Second harmonic electromagnetic emission via Langmuir wave coalescence

    E-Print Network [OSTI]

    Melrose, Don

    constraints.8 The theory of nonlinear three-wave processes to explain fundamental and second harmonic emissionSecond harmonic electromagnetic emission via Langmuir wave coalescence A. J. Willes, P. A. Robinson 1995 The coalescence of Langmuir waves to produce electromagnetic waves at twice the plasma frequency

  19. Harmonic Volumetric Mapping for Solid Modeling Applications Xiaohu Guo

    E-Print Network [OSTI]

    Li, Xin "Shane"

    Harmonic Volumetric Mapping for Solid Modeling Applications Xin Li SBU Xiaohu Guo UT Dallas Hongyu volumetric mapping from a solid polycube model(a) to the solid Buddha model(b). (c) is the color with corresponding cross-sections in (f) and (h), respectively. Abstract Harmonic volumetric mapping for two solid

  20. Project Year Project Team

    E-Print Network [OSTI]

    Gray, Jeffrey J.

    Project Year 2001 Project Team Faculty: Grace Brush, Geography & Environmental Engineering, Whiting School of Engineering Fellow: Dan Bain, Geography & Environmental Engineering, Whiting School. Through this project, the team proposes to develop a variety of resources: a set of general, web

  1. Bounded Projections on Fourier-Stieltjes Transforms Author(s): Charles F. Dunkl and Donald E. Ramirez

    E-Print Network [OSTI]

    Ramirez, Donald E.

    abelian (LCA) group. The group H with the discrete topology is denoted Hd. This is the same as giving H let H be an LCA group with topology tH, and G a subgroup of H which has an LCA group topology 'G monomorphism of an LCA group. We let HG denote H with the topology induced by declaring the su

  2. Relativistic harmonic oscillator model for quark stars

    E-Print Network [OSTI]

    Vishnu M. Bannur

    2008-10-06

    The relativistic harmonic oscillator (RHO) model of hadrons is used to study quark stars. The mass-radius relationship is obtained and compared with bag model of quark star, using Tolman-Oppenheimer-Volkoff equation. In this model, the outward degenerate pressure due to discrete Landau levels and Landau degeneracy balances the inward gravitational pressure. Where as in bag model the degenerate pressure is due to the standard continuum levels which balances the combined inward pressure due to gravitation and bag pressure. So in RHO model, the confinement effect is included in the degenerate pressure. We found a qualitative similarity, but quantitative differences in mass-radius relationship of quark stars in these two models. Masses and radii are relatively larger and the central energy densities, required for stable quark stars, are lower in RHO model than that of bag model.

  3. Harmonization - Two Years' of Transportation Regulation Lessons Learned

    SciTech Connect (OSTI)

    Colborn, K.

    2007-07-01

    The U.S. Department of Transportation issued modifications to the Hazardous Materials Regulations in October, 2004 as part of an ongoing effort to 'harmonize' U.S. regulations with those of the International Atomic Energy Agency. The harmonization effort had several predictable effects on low level radioactive materials shipment that were anticipated even prior to their implementation. However, after two years' experience with the new regulations, transporters have identified several effects on transportation which were not entirely apparent when the regulations were first implemented. This paper presents several case studies in the transportation of low level radioactive materials since the harmonization rules took effect. In each case, an analysis of the challenge posed by the regulatory revision is provided. In some cases, more than one strategy for compliance was considered, and the advantages and disadvantages of each are discussed. In several cases, regulatory interpretations were sought and obtained, and these are presented to clarify the legitimacy of the compliance approach. The presentation of interpretations will be accompanied by reports of clarifying discussions with the U.S. DOT about the interpretation and scope of the regulatory change. Specific transportation issues raised by the revised hazardous materials regulations are reviewed, including: The new definition of radioactive material in accordance with isotope-specific concentration and total activity limits. The new hazardous materials regulations (HMR) created a new definition for radioactive material. A case study is presented for soils contaminated with low levels of Th-230. These soils had been being shipped for years as exempt material under the old 2,000 pCi/g concentration limit. Under the new HMR, these same soils were radioactive material. Further, in rail-car quantities their activity exceeded an A2 value, so shipment of the material in gondolas appeared to require an IP-2 package. Interpretations, discussions, and an exemption were obtained to secure the continued shipment of this material. A provision to allow 'natural' radioactive materials to be exempt from the requirements of the HMR at up to 10x the listed isotopic concentrations. The revised HMR exempts certain natural materials and ores from regulation as radioactive material at concentrations up to 10x that allowed if the materials are not natural. The term 'natural' is not well defined, and initial attempts to qualify for this exemption were thwarted by concerns over what degree of material processing, if any, materials could experience and still be considered 'natural'. The presentation includes an example from a project involving post-processed tungsten ore, and includes interpretations from the US DOT as well as clarifying language from current and drafted IAEA regulation and guidance. New packaging descriptions allowing the use of cargo containers as IP-2 and IP-3 packages in some applications. The revised HMR provides an alternate certification procedure under which standard cargo containers can be used as IP-2 and IP-3 containers. There has been some confusion about how this high level of certification can apply to standard cargo containers when other sections of the regulations make this certification available only to considerably more stout containers after rigorous testing. The discussion includes interpretive guidance from the US DOT, and from the UK Department of Transport clarifying the same provision in IAEA regulations. A new definition of contamination with apparently broad impact on the shipment of empty containers and conveyances. The revised HMR presented a definition of contamination not referenced by any other part of the HMR. The preamble to the revised HMR provides confusing guidance on the application of the definition to shipment of empty containers, and subsequent interpretive guidance letters appear to conflict with the preamble as well as with each other. The definition also has the effect of regulating materials for transport as radioactive even when US

  4. UBC Social Ecological Economic Development Studies (SEEDS) Student Report ZHENGXIANG QIU

    E-Print Network [OSTI]

    ­ the UBC LCA Project ­ which aims to support the development of the field of life cycle assessment (LCA November 18, 2013 #12;2013 Henry Angus LCA 1 Executive Summary LCA aims to compilation and evaluation involved in the LCA analysis to improve their sustainability. The report would discuss how LCA methodology

  5. Noble Gas Clusters and Nanoplasmas in High Harmonic Generation

    E-Print Network [OSTI]

    Aladi, M; Rácz, P; Földes, I B

    2015-01-01

    We report a study of high harmonic generation from noble gas clusters of xenon atoms in a gas jet. Harmonic spectra were investigated as a function of backing pressure, showing spectral shifts due to the nanoplasma electrons in the clusters. At certain value of laser intensity this process may oppose the effect of the well-known ionization-induced blueshift. In addition, these cluster-induced harmonic redshifts may give the possibility to estimate cluster density and cluster size in the laser-gas jet interaction range.

  6. Generalized Harmonic Equations in 3+1 Form

    E-Print Network [OSTI]

    J. David Brown

    2011-11-29

    The generalized harmonic equations of general relativity are written in 3+1 form. The result is a system of partial differential equations with first order time and second order space derivatives for the spatial metric, extrinsic curvature, lapse function and shift vector, plus fields that represent the time derivatives of the lapse and shift. This allows for a direct comparison between the generalized harmonic and the Arnowitt-Deser-Misner formulations. The 3+1 generalized harmonic equations are also written in terms of conformal variables and compared to the Baumgarte-Shapiro-Shibata-Nakamura equations with moving puncture gauge conditions.

  7. High order harmonic generation in dual gas multi-jets

    SciTech Connect (OSTI)

    Tosa, Valer E-mail: calin.hojbota@itim-cj.ro; Hojbota, Calin E-mail: calin.hojbota@itim-cj.ro

    2013-11-13

    High order harmonic generation (HHG) in gas media suffers from a low conversion efficiency that has its origins in the interaction of the atom/molecule with the laser field. Phase matching is the main way to enhance the harmonic flux and several solutions have been designed to achieve it. Here we present numerical results modeling HHG in a system of multi-jets in which two gases alternate: the first gas jet (for example Ne) generates harmonics and the second one which ionizes easier, recover the phase matching condition. We obtain configurations which are experimentally feasible with respect to pressures and dimensions of the jets.

  8. Harmonic Load Pull of High-Power Microwave Devices using Fundamental-Only Load Pull Tuners

    E-Print Network [OSTI]

    Popovic, Zoya

    Harmonic Load Pull of High-Power Microwave Devices using Fundamental-Only Load Pull Tuners John-frequency load pull tuners. Harmonic impedance control at the virtual drain is accomplished through the use the dramatic impact of varying 2nd harmonic termination. A 3rd harmonic termination is added to satisfy

  9. Driven harmonic oscillator as a quantum simulator for open systems

    E-Print Network [OSTI]

    Jyrki Piilo; Sabrina Maniscalco

    2006-10-03

    We show theoretically how a driven harmonic oscillator can be used as a quantum simulator for non-Markovian damped harmonic oscillator. In the general framework, the results demonstrate the possibility to use a closed system as a simulator for open quantum systems. The quantum simulator is based on sets of controlled drives of the closed harmonic oscillator with appropriately tailored electric field pulses. The non-Markovian dynamics of the damped harmonic oscillator is obtained by using the information about the spectral density of the open system when averaging over the drives of the closed oscillator. We consider single trapped ions as a specific physical implementation of the simulator, and we show how the simulator approach reveals new physical insight into the open system dynamics, e.g. the characteristic quantum mechanical non-Markovian oscillatory behavior of the energy of the damped oscillator, usually obtained by the non-Lindblad-type master equation, can have a simple semiclassical interpretation.

  10. Harmonic Image Reconstruction Assisted by a Nonlinear Metmaterial Surface

    E-Print Network [OSTI]

    Wang, Zhiyu

    We experimentally demonstrate a microwave far-field image reconstruction modality with the transverse resolution exceeding the diffraction limit by using a single layer of highly nonlinear metamaterial. The harmonic fields ...

  11. Classification of Certain Compact Riemannian Manifolds with Harmonic Curvature a...

    E-Print Network [OSTI]

    Derdzinski, Andrzej

    Classification of Certain Compact Riemannian Manifolds with Harmonic Curvature a... Derdzinski and University Library provides access to digitized documents strictly for noncommercial educational, research) requires prior written permission from the Goettingen State- and University Library. Each copy of any part

  12. The Globally Harmonized System for Hazard Communication (GHS)

    E-Print Network [OSTI]

    Capogna, Luca

    The Globally Harmonized System for Hazard Communication (GHS) University of Arkansas Facilities groups. · GHS is based on major existing systems around the world, including OSHA's Hazard Communication to hazard communication, providing agreed upon criteria for classification of chemical hazards

  13. Conversion efficiency, scaling and global optimization of high harmonic generation

    E-Print Network [OSTI]

    Falcao-Filho, Edilson L.

    Closed form expressions for the high harmonic generation (HHG) conversion efficiency in the plateau and cut-off region are derived showing agreement with previous observations. Application of these results to optimal ...

  14. Variable Frequency Motor Drives: Harmonics, Power Factor, and Energy Efficiency 

    E-Print Network [OSTI]

    Massey, G. W.

    1997-01-01

    harmonics and power factor. NOTE: The views expressed in this paper do not necessarily represent the views of the United States of America, the U.S. Department of Justice, or the Federal Bureau of Prisons....

  15. Harmonic generation of gravitational wave induced Alfven waves

    E-Print Network [OSTI]

    Mats Forsberg; Gert Brodin

    2007-11-26

    Here we consider the nonlinear evolution of Alfven waves that have been excited by gravitational waves from merging binary pulsars. We derive a wave equation for strongly nonlinear and dispersive Alfven waves. Due to the weak dispersion of the Alfven waves, significant wave steepening can occur, which in turn implies strong harmonic generation. We find that the harmonic generation is saturated due to dispersive effects, and use this to estimate the resulting spectrum. Finally we discuss the possibility of observing the above process.

  16. Action Principle for the Generalized Harmonic Formulation of General Relativity

    E-Print Network [OSTI]

    J. David Brown

    2011-09-07

    An action principle for the generalized harmonic formulation of general relativity is presented. The action is a functional of the spacetime metric and the gauge source vector. An action principle for the Z4 formulation of general relativity has been proposed recently by Bona, Bona--Casas and Palenzuela (BBP). The relationship between the generalized harmonic action and the BBP action is discussed in detail.

  17. Harmonic lattice behavior of two-dimensional colloidal crystals

    E-Print Network [OSTI]

    P. Keim; G. Maret; U. Herz; H. H. von Grünberg

    2004-02-17

    Using positional data from video-microscopy and applying the equipartition theorem for harmonic Hamiltonians, we determine the wave-vector-dependent normal mode spring constants of a two-dimensional colloidal model crystal and compare the measured band-structure to predictions of the harmonic lattice theory. We find good agreement for both the transversal and the longitudinal mode. For $q\\to 0$, the measured spring constants are consistent with the elastic moduli of the crystal.

  18. Life Cycle Greenhouse Gas Emissions from Concentrating Solar Power (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-11-01

    The National Renewable Energy Laboratory (NREL) recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that makes great strides in clarifying inconsistent and conflicting GHG emission estimates in the published literature while providing more precise estimates of GHG emissions from utility-scale CSP systems.

  19. Life Cycle Greenhouse Gas Emissions from Solar Photovoltaics (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-11-01

    The National Renewable Energy Laboratory (NREL) recently led the Life Cycle Assessment (LCA) Harmonization Project, a study that helps to clarify inconsistent and conflicting life cycle GHG emission estimates in the published literature and provide more precise estimates of life cycle GHG emissions from PV systems.

  20. The Harmonic Oscillator and the Uncertainty Principle In atomic units the wave function in coordinate space for an harmonic oscillator with reduced mass, ,

    E-Print Network [OSTI]

    Rioux, Frank

    The Harmonic Oscillator and the Uncertainty Principle In atomic units the wave function in coordinate space for an harmonic oscillator with reduced mass, , equal to one and force constant k is given occurs in the simple harmonic oscillator. The classical turning point is that position at which the total

  1. Numerical Analysis of Fifth-Harmonic Conversion of Low-Power Pulsed Nd:YAG Laser with Resonance of Second Harmonic

    E-Print Network [OSTI]

    Kung, Andy

    Numerical Analysis of Fifth-Harmonic Conversion of Low-Power Pulsed Nd:YAG Laser with Resonance of Second Harmonic Lien-Bee CHANG1Ã , S. C. WANG1 and A. H. KUNG1;2 1 Institute of Electro March 13, 2003) A model for the fifth-harmonic generation of pulsed IR lasers involving an external ring

  2. Brain Surface Conformal Mapping and Brain VolumetricBrain Surface Conformal Mapping and Brain Volumetric Harmonic Map withHarmonic Map with VariationalVariational MethodsMethods

    E-Print Network [OSTI]

    Brain Surface Conformal Mapping and Brain VolumetricBrain Surface Conformal Mapping and Brain Volumetric Harmonic Map withHarmonic Map with VariationalVariational MethodsMethods YalinYalin WangWang11 to the cortical surface matching problem. We further extended the algorithm to find a 3D volumetric harmonic map

  3. Efficiency enhancement of a harmonic lasing free-electron laser

    SciTech Connect (OSTI)

    Salehi, E.; Maraghechi, B.; Mirian, N. S.

    2015-03-15

    The harmonic lasing free-electron laser amplifier, in which two wigglers is employed in order for the fundamental resonance of the second wiggler to coincide with the third harmonic of the first wiggler to generate ultraviolet radiation, is studied. A set of coupled nonlinear first-order differential equations describing the nonlinear evolution of the system, for a long electron bunch, is solved numerically by CYRUS code. Solutions for the non-averaged and averaged equations are compared. Remarkable agreement is found between the averaged and non-averaged simulations for the evolution of the third harmonic. Thermal effects in the form of longitudinal velocity spread are also investigated. For efficiency enhancement, the second wiggler field is set to decrease linearly and nonlinearly at the point where the radiation of the third harmonic saturates. The optimum starting point and the slope of the tapering of the amplitude of the wiggler are found by a successive run of the code. It is found that tapering can increase the saturated power of the third harmonic considerably. In order to reduce the length of the wiggler, the prebunched electron beam is considered.

  4. Harmonic entanglement in a degenerate parametric down conversion

    E-Print Network [OSTI]

    Sintayehu Tesfa

    2007-07-25

    We study the harmonic entanglement and squeezing in a two-mode radiation produced in a degenerate parametric down conversion process coupled to a two-mode vacuum reservoir employing the linearization procedure. It is found that there is a quadrature entanglement between the harmonically related fundamental and second-harmonic modes and the superimposed radiation exhibits a significant two-mode squeezing. The entanglement exits even when there is no two-mode squeezing, since the correlation leading to these phenomena are essentially different. In addition, the more the external coherent light is down converted, the more stronger the entanglement and mean photon number of the two-mode radiation would be which is not generally true for squeezing.

  5. Flow harmonics within an analytically solvable viscous hydrodynamic model

    E-Print Network [OSTI]

    Yoshitaka Hatta; Jorge Noronha; Giorgio Torrieri; Bo-Wen Xiao

    2014-10-01

    Based on a viscous hydrodynamic model with anisotropically perturbed Gubser flow and isothermal Cooper-Frye freezeout at early times, we analytically compute the flow harmonics $v_n(p_T)$ and study how they scale with the harmonic number $n$ and transverse momentum, as well as the system size, shear and bulk viscosity coefficients, and collision energy. In particular, we find that the magnitude of shear viscous corrections grows linearly with $n$. The mixing between different harmonics is also discussed. While this model is rather simple as compared to realistic heavy-ion collisions, we argue that the scaling results presented here may be meaningfully compared to experimental data collected over many energies, system sizes, and geometries.

  6. Harmonic Oscillator on the ${\\rm SO}(2,2)$ Hyperboloid

    E-Print Network [OSTI]

    Davit R. Petrosyan; George S. Pogosyan

    2015-11-25

    In the present work the classical problem of harmonic oscillator in the hyperbolic space $H_2^2$: $z_0^2+z_1^2-z_2^2-z_3^2=R^2$ has been completely solved in framework of Hamilton-Jacobi equation. We have shown that the harmonic oscillator on $H_2^2$, as in the other spaces with constant curvature, is exactly solvable and belongs to the class of maximally superintegrable system. We have proved that all the bounded classical trajectories are closed and periodic. The orbits of motion are ellipses or circles for bounded motion and ultraellipses or equidistant curve for infinite ones.

  7. Harmonic analysis on a galois field and its subfields

    E-Print Network [OSTI]

    A. Vourdas

    2006-10-17

    Complex functions $\\chi (m)$ where $m$ belongs to a Galois field $GF(p^ \\ell)$, are considered. Fourier transforms, displacements in the $GF(p^ \\ell) \\times GF(p^ \\ell)$ phase space and symplectic $Sp(2,GF(p^ \\ell))$ transforms of these functions are studied. It is shown that the formalism inherits many features from the theory of Galois fields. For example, Frobenius transformations are defined which leave fixed all functions $h(n)$ where $n$ belongs to a subfield $GF(p^ d)$ of the $GF(p^ \\ell)$. The relationship between harmonic analysis (or quantum mechanics) on $GF(p^ \\ell)$ and harmonic analysis on its subfields, is studied.

  8. Harmonic mean, the Gamma factor and Speed of Light

    E-Print Network [OSTI]

    Chandru Iyer

    2008-11-17

    The relationship between the harmonic mean and special relativity is concisely elucidated. The arguments in favor and against SRT are explored. It is shown that the ratio of the speed of light to the harmonic mean of the onward and return speeds of light in a moving frame under Newtonian mechanics, when equitably distributed between space and time as a correction, leads to the Lorentz transformation. This correction implies an apparent contraction of objects and time dilation. However, the symmetry of the onward and inverse transformations give a different meaning to the gamma factor

  9. On the harmonic oscillator properties in a twisted Moyal plane

    E-Print Network [OSTI]

    Ezinvi Baloitcha; Mahouton Norbert Hounkonnou; Dine Ousmane Samary

    2012-03-25

    This work prolongs, using an operator method, the investigations started in our recent paper J. Math. Phys. 51., 102108 on the spectrum and states of the harmonic oscillator on twisted Moyal plane, where rather a Moyal-star-algebraic approach was used. The physical spectrum and states of the harmonic oscillator on twisted Moyal space, obtained here by solving the corresponding differential equation, are similar to those of the ordinary Moyal space, with different parameters. This fortunately contrasts with the previous study which produced unexpected results, i.e. infinitely degenerate states with energies depending on the coordinate functions.

  10. Harmonic and interharmonic distortion modeling in multiconverter systems

    SciTech Connect (OSTI)

    Carbone, R.; Morrison, R.E.; Testa, A.; Menniti, D.

    1995-07-01

    The problem of modeling multiconverter systems in presence of harmonic and interharmonic distortion is considered. Specifically, current source rectifiers are considered as distortion sources some supply d.c. motors and the remaining supplying inverters feeding a.c. machines. The classical analogue, frequency domain and time domain models proposed in the literature to study harmonic distortion in a multiconverter system are considered and for each model suitable extension to include the interharmonic distortion are presented and critically analyzed. The results of several experiments are reported to show the usefulness and to compare the accuracy of the different extensions considered.

  11. Dipolar second harmonic generation in inversion symmetric materials

    E-Print Network [OSTI]

    Hardhienata, Hendradi; Prylepa, Andrii; Reitböck, Cornelia; Hingerl, Kurt

    2012-01-01

    It is generally argued that material classes with inversion symmetry such as silicon do not produce bulk dipole related second harmonic generation (SHG). So, SHG is then either ascribed to surface effects or bulk related electric quadrupol or magnetic dipole effects. In this letter we show analytically that due to the fact of the decaying harmonic electric field certain Si facets, as eg. Si(111), produce a bulk dipole SHG response and we propose an experiment, exploiting the different dispersion for the fundamental as well as frequency doubled radiation to determine this effect.

  12. Second-harmonic generation from hyperbolic plasmonic nanorod metamaterial slab

    E-Print Network [OSTI]

    Marino, Giuseppe; Krasavin, Alexey V; Ginzburg, Pavel; Olivier, Nicolas; Wurtz, Gregory A; Zayats, Anatoly V

    2015-01-01

    Hyperbolic plasmonic metamaterials provide numerous opportunities for designing unusual linear and nonlinear optical properties. We show that the modal overlap of fundamental and second-harmonic light in an anisotropic plasmonic metamaterial slab results in the broadband enhancement of radiated second-harmonic intensity by up to 2 and 11 orders of magnitudes for TM- and TE-polarized fundamental light, respectively, compared to a smooth Au film under TM-polarised illumination. The results open up possibilities to design tuneable frequency-doubling metamaterial with the goal to overcome limitations associated with classical phase matching conditions in thick nonlinear crystals.

  13. The progress in developing superconducting third harmonic cavity

    SciTech Connect (OSTI)

    Solyak, Nikolay; Edwards, Helen; Foley, Mike; Gonin, Ivan; Harms, Elvin; Khabiboulline, Timergali; Mitchell, Donald; Olis, Daniel; Rowe, Allan; /Fermilab

    2006-06-01

    The XFEL and TTF facilities are planning to use section with a few third harmonic cavities (3.9GHz) upstream of the bunch compressor to improve beam performance [1-2]. Fermilab is developing superconducting third harmonic section for the TTFII upgrade. This section will include four cavities equipped with couplers and blade tuners installed in cryostat. Up to now, two cavities are complete and one of them is under test. The status of the cavity development and preliminary test results are presented in this paper.

  14. Nonlinear Trivelpiece--Gould waves: Recurrence, harmonic cascade, and sidebands

    SciTech Connect (OSTI)

    Cabral, J.A.C.; Lapao, L.M.; Mendonca, J.T. )

    1993-03-01

    A theoretical and experimental study of Trivelpiece--Gould waves propagating in a magnetized plasma column is presented in this paper. In the experiments, these waves are excited by a radio frequency (rf) source, which also serves to create the plasma. Observation of nonlinear effects includes space and time recurrence effects, a wave spectrum containing a large number (up to 25) harmonics, and low-frequency sidebands. The theoretical model explains the recurrence effects as a consequence of multiple nonlinear interactions between the fundamental wave and its harmonics. A good agreement is found between theory and the experiments.

  15. High-order harmonic generation in a capillary discharge

    DOE Patents [OSTI]

    Rocca, Jorge J.; Kapteyn, Henry C.; Mumane, Margaret M.; Gaudiosi, David; Grisham, Michael E.; Popmintchev, Tenio V.; Reagan, Brendan A.

    2010-06-01

    A pre-ionized medium created by a capillary discharge results in more efficient use of laser energy in high-order harmonic generation (HHG) from ions. It extends the cutoff photon energy, and reduces the distortion of the laser pulse as it propagates down the waveguide. The observed enhancements result from a combination of reduced ionization energy loss and reduced ionization-induced defocusing of the driving laser as well as waveguiding of the driving laser pulse. The discharge plasma also provides a means to spectrally tune the harmonics by tailoring the initial level of ionization of the medium.

  16. High-harmonic XUV source for time- and angle-resolved photoemission...

    Office of Scientific and Technical Information (OSTI)

    High-harmonic XUV source for time- and angle-resolved photoemission spectroscopy Citation Details In-Document Search Title: High-harmonic XUV source for time- and angle-resolved...

  17. Ultrasensitive Optical Shape Characterization of Gold Nanoantennas Using Second Harmonic Generation

    E-Print Network [OSTI]

    Dalang, Robert C.

    Ultrasensitive Optical Shape Characterization of Gold Nanoantennas Using Second Harmonic Generation for the sensitive optical characterization of plasmonic nanostructures. Furthermore, defects located where on the second harmonic signal. KEYWORDS: Plasmonics, nonlinear optics, surface integral formulation, realistic

  18. Wideband phased array antennas and compact, harmonic-suppressed microstrip filters 

    E-Print Network [OSTI]

    Tu, Wen-Hua

    2009-05-15

    . Since the electromagnetic spectrum is limited and has to be shared, interference is getting serious as more and more wireless applications emerge. Filters are key components to prevent harmonic interference. The harmonic signals can be suppressed...

  19. Progress in Large Period Multilayer Coatings for High Harmonic and Solar Applications

    E-Print Network [OSTI]

    Aquila, Andrew

    2008-01-01

    large period multilayer coatings for high harmonic and solarBerkeley, CA 94720 Multilayer coatings for normal incidence

  20. Energy transport by acoustic modes of harmonic Lisa Harris

    E-Print Network [OSTI]

    Theil, Florian

    Energy transport by acoustic modes of harmonic lattices Lisa Harris , Jani Lukkarinen , Stefan vector, k = 0. To derive equations that describe the macroscopic energy transport we introduce the Wigner concentrating to k = 0. A simple consequence of our result is the complete characterization of energy transport

  1. A superintegrable discrete harmonic oscillator based on bivariate Charlier polynomials

    E-Print Network [OSTI]

    Vincent X. Genest; Hiroshi Miki; Luc Vinet; Guofu Yu

    2015-11-30

    A simple discrete model of the two dimensional isotropic harmonic oscillator is presented. It is superintegrable with su(2) as its symmetry algebra. It is constructed with the help of the algebraic properties of the bivariate Charlier polyno-mials. This adds to the other discrete superintegrable models of the oscillator based on Krawtchouk and Meixner orthogonal polynomials in several variables.

  2. Harmonic analysis of the Ha velocity field of NGC 4254

    E-Print Network [OSTI]

    Laurent Chemin; Olivier Hernandez; Chantal Balkowski; Claude Carignan; Philippe Amram

    2005-12-20

    The ionized gas kinematics of the Virgo Cluster galaxy NGC 4254 (Messier 99) is analyzed by an harmonic decomposition of the velocity field into Fourier coefficients. The aims of this study are to measure the kinematical asymmetries of Virgo cluster galaxies and to connect them to the environment. The analysis reveals significant $m=1,2,4$ terms which origins are discussed.

  3. On the harmonic oscillator realisation of q-oscillators

    E-Print Network [OSTI]

    D. Gangopadhyay; A. P. Isaev

    2007-01-05

    The general version of the bosonic harmonic oscillator realisation of bosonic q-oscillators is given. It is shown that the currently known realisation is a special case of our general solution. The investigation has been performed at the Laboratory of theoretical Physics,JINR.

  4. Linear harmonic oscillator in spaces with degenerate metrics

    E-Print Network [OSTI]

    N. A. Gromov

    2006-03-02

    With the help of contraction method we study the harmonic oscillator in spaces with degenerate metrics, namely, on Galilei plane and in the flat 3D Cayley-Klein spaces $R_3(j_2,j_3).$ It is shown that the inner degrees of freedom are appeared which physical dimensions are different from the dimension of the space.

  5. Dynamics of an Open System for Repeated Harmonic Perturbation

    E-Print Network [OSTI]

    Hiroshi Tamura; Valentin A. Zagrebnov

    2015-06-18

    We use the Kossakowski-Lindblad-Davies formalism to consider an open system defined as the Markovian extension of one-mode quantum oscillator S, perturbed by a piecewise stationary harmonic interaction with a chain of oscillators C. The long-time asymptotic behaviour of various subsystems of S+C are obtained in the framework of the dual W-dynamical system approach.

  6. Strong Second Harmonic Generation from the Tantalum Thioarsenates...

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

    Strong Second Harmonic Generation from the Tantalum Thioarsenates A3Ta2AsS11 (A K and Rb) Home Author: T.K. Bera, J.I. Jang, J.B. Ketterson, M.G. Kanatzidis Year: 2009 Abstract:...

  7. Harmonic Superfields in N=4 Supersymmetric Quantum Mechanics

    E-Print Network [OSTI]

    Evgeny A. Ivanov

    2011-02-11

    This is a brief survey of applications of the harmonic superspace methods to the models of N=4 supersymmetric quantum mechanics (SQM). The main focus is on a recent progress in constructing SQM models with couplings to the background non-Abelian gauge fields. Besides reviewing and systemizing the relevant results, we present some new examples and make clarifying comments.

  8. Response of turbulent premixed flames to harmonic acoustic forcing

    E-Print Network [OSTI]

    Lieuwen, Timothy C.

    for land- based gas turbines, future aircraft engines, industrial heaters and boilers rely on premixed 1540 2006 The Combustion Institute. Published by Elsevier Inc. All rights reserved. Keywords: Flame area to a harmonic disturbance of given amplitude depends upon turbulence intensity. Low emissions combustion systems

  9. A computational introduction to quantum statistics using harmonically trapped particles

    E-Print Network [OSTI]

    Ligare, Martin

    and multiplicities. The examples illustrate the effect of quantum statistics on the sharing of energy between weaklyA computational introduction to quantum statistics using harmonically trapped particles Martin the statistical definition of entropy and the second law of thermodynamics [Am. J. Phys. 65, 26 (1997)]. I

  10. HHFW (High Harmonic Fast Wave) Eddy Current Analysis for Antenna

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    1 NSTX HHFW (High Harmonic Fast Wave) Eddy Current Analysis for Antenna NSTX-CALC-24-03-01 June 1 performed.) The model was first built for NSTX to verify the eddy current effect on antenna during plasma force of the induced eddy current in the components. The force data was transferred to the structural

  11. -okfl ^ ORNL/CON-172 Linear Harmonic Analysis of Free-

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    Stirling Engines N. C. J. Chen F. P. Griffin OPERATED BY MARTIN MARIETTA ENERGY SYSTEMS, INC. #12;ORNL/CON-172 Engineering Technology Division* LINEAR HARMONIC ANALYSIS OF FREE-PISTON STIRLING/dynamic problem that is associated with a free-piston Stirling engine (FPSE). The governing equations

  12. Thermal Conductivity for a Noisy Disordered Harmonic Chain

    E-Print Network [OSTI]

    Cedric Bernardin

    2008-08-05

    We consider a $d$-dimensional disordered harmonic chain (DHC) perturbed by an energy conservative noise. We obtain uniform in the volume upper and lower bounds for the thermal conductivity defined through the Green-Kubo formula. These bounds indicate a positive finite conductivity. We prove also that the infinite volume homogenized Green-Kubo formula converges.

  13. Theory of second-harmonic generation in colloidal crystals

    E-Print Network [OSTI]

    Jian, Y C; Huang, J P

    2006-01-01

    We study the effective susceptibility of second-harmonic generation (SHG) in colloidal crystals considering the local lattice effect using Edward-Kornfeld formulation, which are made of graded metallodielectric nanoparticles with optical nonlinearity suspended in a host fluid. We find a large enhancement and redshift of optical nonlinearity, which arises from the periodic structure, local field effects and gradation in the metallic cores.

  14. Tuning manifold harmonics filters Thomas Lewiner, Thales Vieira, Alex Bordignon,

    E-Print Network [OSTI]

    Díaz, Lorenzo J.

    Tuning manifold harmonics filters Thomas Lewiner, Thales Vieira, Alex Bordignon, Allyson Cabral : Thomas Lewiner, Thales Vieira, Alex Bordignon, Allyson Cabral, Clarissa Marques, Jo~ao Paix~ao, Lis Cust CABRAL1 , CLARISSA MARQUES1 , JO ~AO PAIX ~AO1 , LIS CUST ´ODIO1 , MARCOS LAGE1 , MARIA ANDRADE1 , RENATA

  15. Energy transport by acoustic modes of harmonic Lisa Harris # , Jani Lukkarinen + , Stefan Teufel # , and Florian Theil #

    E-Print Network [OSTI]

    Energy transport by acoustic modes of harmonic lattices Lisa Harris # , Jani Lukkarinen + , Stefan of energy transport in harmonic lattices with acoustic dispersion relations. 1 Introduction. The energy, we first need to understand how energy is transported within the crystal via purely harmonic

  16. High harmonic generation in relativistic laserplasma interactiona... S. Banerjee,b)

    E-Print Network [OSTI]

    Umstadter, Donald

    High harmonic generation in relativistic laser­plasma interactiona... S. Banerjee,b) A. R of Michigan, Ann Arbor, Michigan 48109 Received 2 November 2001; accepted 26 February 2002 High harmonics, in addition to the conventional atomic harmonics from bound electrons there is significant contribution

  17. DIRAC-HARMONIC MAPS FROM INDEX THEORY BERND AMMANN AND NICOLAS GINOUX

    E-Print Network [OSTI]

    Ammann, Bernd

    DIRAC-HARMONIC MAPS FROM INDEX THEORY BERND AMMANN AND NICOLAS GINOUX Abstract. We prove existence results for Dirac-harmonic maps using index theoretical tools. They are mainly interesting if the source map between the source and target manifolds is a harmonic map. Contents 1. Introduction 1 2

  18. High harmonic generation spectra of aligned benzene in circular polarized laser field

    E-Print Network [OSTI]

    Moiseyev, Nimrod

    High harmonic generation spectra of aligned benzene in circular polarized laser field Petra Zda-order harmonic generation in benzene, aligned in the polarization plane of circular polarized laser field-lived resonance state up to the intensity of about 90 TW cm 2 . The high-order harmonics emitted by the system

  19. HARMONIC is 3Competitive for Two Servers Marek Chrobak and Lawrence L. Larmore

    E-Print Network [OSTI]

    Chrobak, Marek

    HARMONIC is 3­Competitive for Two Servers Marek Chrobak and Lawrence L. Larmore Department the server algorithm, called HARMONIC, that always moves the servers with probabilities proportional to the inverses of distances to the request point. We show that for two servers HARMONIC is 3­competitive. Before

  20. 3D Harmonic Mapping and Tetrahedral Meshing of Brain Imaging Data

    E-Print Network [OSTI]

    Thompson, Paul

    3D Harmonic Mapping and Tetrahedral Meshing of Brain Imaging Data Yalin Wang1 , Xianfeng Gu2 , Paul algorithm finds a harmonic map from a 3-manifold to a 3D solid sphere and the second is a novel sphere of magnetic resonance images (MRI). A heat flow method is used to solve the volumetric harmonic mapping

  1. HARMONIC CASCADE FEL DESIGNS FOR LUX, A FACILTY FOR ULTRAFAST X-RAY SCIENCE

    E-Print Network [OSTI]

    Wurtele, Jonathan

    HARMONIC CASCADE FEL DESIGNS FOR LUX, A FACILTY FOR ULTRAFAST X-RAY SCIENCE J. Corlett, W. Fawley. We also discuss lattice considerations pertinent to harmonic cascade FELs, somesensitivity studies. While much of this effort has been concentrated upon SASE-based FEL's, there is an alternative "harmonic

  2. Harmonic phase-dispersion microscope with a MachZehnder interferometer

    E-Print Network [OSTI]

    Fang-Yen, Christopher

    Harmonic phase-dispersion microscope with a Mach­Zehnder interferometer Andrew Ahn, Changhuei Yang S. Feld Harmonic phase-dispersion microscopy (PDM) is a new imaging technique in which contrast is provided by differences in refractive index at two harmonically related wavelengths. We report a new

  3. Fast Harmonic Balance of SIS Mixers with Multiple Junctions and Superconducting Circuits

    E-Print Network [OSTI]

    Ward, John

    Fast Harmonic Balance of SIS Mixers with Multiple Junctions and Superconducting Circuits Frank Rice-47, Pasadena, CA 91125, USA. Abstract We have extended the spectral domain harmonic balance method-Raphson technique to achieve rapid convergence, even when many harmonics are included in the analysis. Another im

  4. Harmonic Potential with Gaussian Barrier Model for Ammonia Inversion Frank Rioux

    E-Print Network [OSTI]

    Rioux, Frank

    Harmonic Potential with Gaussian Barrier Model for Ammonia Inversion Frank Rioux Department is modeled as a harmonic potential with an internal Gaussian barrier to inversion. The allowed vibrational at 3444, 3337, 1627, and 950 cm -1. The umbrella-like bending mode at 950 cm -1 is modeled by a harmonic

  5. Harmonic propagation of variability in surface energy balance within a coupled soilvegetationatmosphere system

    E-Print Network [OSTI]

    Gentine, Pierre

    Harmonic propagation of variability in surface energy balance within a coupled propagation of the harmonics in order to differentiate between the response of the system to forcing, P., J. Polcher, and D. Entekhabi (2011), Harmonic propagation of variability in surface energy

  6. High-harmonic generation in plasmas from relativistic laser-electron scattering

    E-Print Network [OSTI]

    Umstadter, Donald

    High-harmonic generation in plasmas from relativistic laser-electron scattering S. Banerjee, A. R Results are presented on the generation of high harmonics through the scattering of relativistic electrons to be the emission of even- order harmonics, linear dependence on the electron density, significant amount

  7. Time-harmonic BEM for 2-D piezoelectricity applied to eigenvalue problems

    E-Print Network [OSTI]

    Denda, Mitsunori "Mitch"

    Time-harmonic BEM for 2-D piezoelectricity applied to eigenvalue problems M. Denda a,*, Y. Araki b, and present the direct formulation of the time-harmonic boundary element method (BEM) for the two and the latter is given by a line integral along the unit circle. The static BEM is a component of the time-harmonic

  8. HARMONIC CASCADE FEL DESIGNS FOR LUX G. Penn, M. Reinsch, J. Wurtele

    E-Print Network [OSTI]

    Wurtele, Jonathan

    HARMONIC CASCADE FEL DESIGNS FOR LUX G. Penn, M. Reinsch, J. Wurtele , J.N. Corlett, W.M. Fawley, A stages of higher harmonic generation, seeded by a 200­250 nm laser of similar duration. This laser mod then produces ra- diation at a higher harmonic after entering a second, differ- ently tuned undulator. Repeated

  9. PHYSICAL REVIEW E 91, 022114 (2015) Stochastic thermodynamics of a tagged particle within a harmonic chain

    E-Print Network [OSTI]

    Lacoste, David

    2015-01-01

    a harmonic chain David Lacoste1 and Michael A. Lomholt2 1 Laboratoire de Physico-Chimie Th´eorique - UMR CNRS the stochastic thermodynamics of an overdamped harmonic chain, which can be viewed equivalently as a one diffusion, various approximations have been introduced. One of them is the harmonization method, which

  10. Harmonic Exponential Families on Manifolds Taco S. Cohen T.S.COHEN@UVA.NL

    E-Print Network [OSTI]

    Welling, Max

    Harmonic Exponential Families on Manifolds Taco S. Cohen T.S.COHEN@UVA.NL University of Amsterdam applications to Bayesian cam- era motion estimation (where harmonic exponen- tial families serve as conjugate experimental re- sults show that harmonic densities yield a signif- icantly higher likelihood than the best

  11. Harmonic tori in symmetric spaces and commuting Hamiltonian systems on loop algebras

    E-Print Network [OSTI]

    Harmonic tori in symmetric spaces and commuting Hamiltonian systems on loop algebras F. E. Burstall, D. Ferus, F. Pedit, and U. Pinkall Introduction Background The study of harmonic maps of compact and Physics: For example, minimal surfaces are (conformal) harmonic maps while constant mean curvature

  12. High-harmonic generation by quantum-dot nanorings Ioan Bldea,1,

    E-Print Network [OSTI]

    Moiseyev, Nimrod

    High-harmonic generation by quantum-dot nanorings Ioan Bâldea,1, * Ashish K. Gupta,2, Lorenz S with a circularly polarized light. The results show that the high-harmonic generation (HHG) spectra obtained from of the high-order harmonics is studied, and it is shown that it can increase the intensity of the high

  13. High-harmonic generation in a dense medium V. V. Strelkov,1,2,

    E-Print Network [OSTI]

    Becker, Andreas

    High-harmonic generation in a dense medium V. V. Strelkov,1,2, * V. T. Platonenko,3 and A. Becker1 2005 The high-harmonic generation in a plasma or gas under conditions when the single-atom response using the Monte Carlo method. Harmonic spectra are calculated for different medium densities and laser

  14. Harmonic Functions and Collision Probabilities Christopher I. Connolly, EK 266 y

    E-Print Network [OSTI]

    Choset, Howie

    Harmonic Functions and Collision Probabilities Christopher I. Connolly, EK 266 y Arti cial-5022, FAX (415) 859-3735 email: connolly@ai.sri.com Abstract There is a close relationship between harmonic processes. The hitting probabilities for random walks can be cast as a Dirichlet problem for harmonic func

  15. HARMONIC TORI IN DE SITTER SPACES S2n EMMA CARBERRY, KATHARINE TURNER

    E-Print Network [OSTI]

    Sydney, University of

    HARMONIC TORI IN DE SITTER SPACES S2n 1 EMMA CARBERRY, KATHARINE TURNER Abstract. We show that all superconformal harmonic immersions from genus one surfaces into de Sitter spaces S2n 1 with globally defined harmonic sequence are of finite-type and hence result merely from solving a pair of ordinary differential

  16. Aalborg Universitet Harmonic Resonances in Wind Power Plants: Modeling, Analysis and Active Mitigation

    E-Print Network [OSTI]

    Bak, Claus Leth

    Aalborg Universitet Harmonic Resonances in Wind Power Plants: Modeling, Analysis and Active. (2015). Harmonic Resonances in Wind Power Plants: Modeling, Analysis and Active Mitigation Methods from vbn.aau.dk on: juli 04, 2015 #12;Harmonic Resonances in Wind Power Plants: Modeling, Analysis

  17. Second and Fourth Harmonic Frequencies in Electric Field-Induced Liquid Crystal Reorientations

    E-Print Network [OSTI]

    Wu, Shin-Tson

    Second and Fourth Harmonic Frequencies in Electric Field-Induced Liquid Crystal Reorientations of Central Florida, Orlando, Florida, USA The second and fourth harmonics of low frequency electric field-optical modulation; liquid crystal; second and fourth harmonics 1. INTRODUCTION Nematic liquid crystal (LC) has been

  18. Exploration of Below-Threshold Harmonic Generation Mechanisms of Cesium Atoms

    E-Print Network [OSTI]

    Chu, Shih-I

    Chapter 13 Exploration of Below-Threshold Harmonic Generation Mechanisms of Cesium Atoms in Intense-perturbative quantum study of high-order harmonic generation (HHG) of Cesium atoms in intense mid-infrared laser pulses of harmonics in this intermediate energy regime [3­5]. Power et al. [3] performed the experiments with Cesium

  19. ANALYTIC MODEL OF HARMONIC GENERATION IN THE LOW-GAIN FEL REGIME

    E-Print Network [OSTI]

    Wurtele, Jonathan

    ANALYTIC MODEL OF HARMONIC GENERATION IN THE LOW-GAIN FEL REGIME G. Penn, M. Reinsch, J.S. Wurtele , LBNL, Berkeley, CA 94720, USA Abstract Harmonic generation using free electron lasers (FELs) requires with simulation results using the FEL code GENESIS, both for single stages of harmonic generation and for the LUX

  20. Volumetric Harmonic Brain Mapping using a Variational Method Yalin Wang1

    E-Print Network [OSTI]

    Thompson, Paul

    Volumetric Harmonic Brain Mapping using a Variational Method Yalin Wang1 , Xianfeng Gu2 , Tony F investigation of 3D volumetric brain harmonic mapping. By transforming the full 3D brain volume to a solid harmonic map from a volumetric brain image to a 3D solid sphere and the second uses a sphere carving

  1. Project Year Project Team

    E-Print Network [OSTI]

    Gray, Jeffrey J.

    & Sciences Project Title Visualize Physical Principles with Virtual Lab Modules Audience Undergraduate provide easy access to digital information, but don't provide experience with right- hand screws, electric of the last generation of physics students. The result is that today's students don't have an intuitive

  2. Project Year Project Title

    E-Print Network [OSTI]

    Gray, Jeffrey J.

    . Pedagogical Issue One of the challenges in teaching the Introduction to Computer Music course is the lack flow and practices. These resources will provide an online space through which students will be able piece of this project will be an animated studio walkthrough requiring user interaction and providing

  3. Resonant second harmonic generation of a Gaussian electromagnetic beam in a collisional magnetoplasma

    SciTech Connect (OSTI)

    Kaur, Sukhdeep; Sharma, A. K. [Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi 110016 (India); Salih, Hyder A. [Department of Applied Sciences, University of Baghdad, Baghdad (Iraq)

    2009-04-15

    Second harmonic generation of a right circularly polarized Gaussian electromagnetic beam in a magnetized plasma is investigated. The beam causes Ohmic heating of electrons and subsequent redistribution of the plasma, leading to self-defocusing. The radial density gradient, in conjunction with the oscillatory electron velocity, produces density oscillation at the wave frequency. The density oscillation beats with the oscillatory velocity to produce second harmonic current density, giving rise to resonant second harmonic radiation when the wave frequency is one-third of electron cyclotron frequency. The second harmonic field has azimuthal dependence as exp(i{theta}). The self-defocusing causes a reduction in the efficiency of harmonic generation.

  4. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Raza Jaffery

    E-Print Network [OSTI]

    ­ the UBC LCA Project ­ which aims to support the development of the field of life cycle assessment (LCA of construction - developed primarily in response to the challenge of creating a more sustainable society. The LCA Building in UBC, CIRS LCA study is a part of UBC wide academic building LCA data repository and would

  5. Higher harmonics generation in relativistic electron beam with virtual cathode

    SciTech Connect (OSTI)

    Kurkin, S. A., E-mail: KurkinSA@gmail.com; Badarin, A. A.; Koronovskii, A. A.; Hramov, A. E. [Saratov State Technical University, Politechnicheskaja 77, Saratov 410028, Russia and Saratov State University, Astrakhanskaja 83, Saratov 410012 (Russian Federation)

    2014-09-15

    The study of the microwave generation regimes with intense higher harmonics taking place in a high-power vircator consisting of a relativistic electron beam with a virtual cathode has been made. The characteristics of these regimes, in particular, the typical spectra and their variations with the change of the system parameters (beam current, the induction of external magnetic field) as well as physical processes occurring in the system have been analyzed by means of 3D electromagnetic simulation. It has been shown that the system under study demonstrates the tendency to the sufficient growth of the amplitudes of higher harmonics in the spectrum of current oscillations in the VC region with the increase of beam current. The obtained results allow us to consider virtual cathode oscillators as promising high power mmw-to-THz sources.

  6. Freely floating structures trapping time-harmonic water waves (revisited)

    E-Print Network [OSTI]

    Nikolay Kuznetsov; Oleg Motygin

    2014-10-22

    We study the coupled small-amplitude motion of the mechanical system consisting of infinitely deep water and a structure immersed in it. The former is bounded above by a free surface, whereas the latter is formed by an arbitrary finite number of surface-piercing bodies floating freely. The mathematical model of time-harmonic motion is a spectral problem in which the frequency of oscillations serves as the spectral parameter. It is proved that there exist axisymmetric structures consisting of $N \\geq 2$ bodies; every structure has the following properties: (i) a time-harmonic wave mode is trapped by it; (ii) some of its bodies (may be none) are motionless, whereas the rest of the bodies (may be none) are heaving at the same frequency as water. The construction of these structures is based on a generalization of the semi-inverse procedure applied earlier for obtaining trapping bodies that are motionless although float freely.

  7. All-Optical Field-Induced Second-Harmonic Generation

    E-Print Network [OSTI]

    Davidson, Roderick B; Ziegler, Jed I; Avanesyan, Sergey M; Lawrie, Ben J; Haglund, Richard F

    2015-01-01

    Efficient frequency modulation techniques are crucial to the development of plasmonic metasurfaces for information processing and energy conversion. Nanoscale electric-field confinement in optically pumped plasmonic structures enables stronger nonlinear susceptibilities than are attainable in bulk materials. The interaction of three distinct electric fields in (chi)^3 optical processes allows for all-optical modulation of nonlinear signals. Here we demonstrate effcient third-order second harmonic generation (SHG) in a serrated nanogap plasmonic geometry that generates steep electric field gradients within a dielectric material. We utilize an ultrafast optical pump to control the plasmonically induced electric-fields and to generate bandwidth-limited ultrafast second-harmonic pulses driven by the control pulses. The combination of plasmonic metasurfaces with all-optical control and the freedom to choose the dielectric allow multiple generalizations of this concept and geometry to other four-wave mixing process...

  8. Oncotripsy: Targeting cancer cells selectively via resonant harmonic excitation

    E-Print Network [OSTI]

    Heyden, Stefanie

    2015-01-01

    We investigate a method of selectively targeting cancer cells by means of ultrasound harmonic excitation at their resonance frequency, which we refer to as oncotripsy. The geometric model of the cells takes into account the cytoplasm, nucleus and nucleolus, as well as the plasma membrane and nuclear envelope. Material properties are varied within a pathophysiologically-relevant range. A first modal analysis reveals the existence of a spectral gap between the natural frequencies and, most importantly, resonant growth rates of healthy and cancerous cells. The results of the modal analysis are verified by simulating the fully-nonlinear transient response of healthy and cancerous cells at resonance. The fully nonlinear analysis confirms that cancerous cells can be selectively taken to lysis by the application of carefully tuned ultrasound harmonic excitation while simultaneously leaving healthy cells intact.

  9. High harmonic generation in hydrogen and helium atoms subject to one{ and two{color laser pulses

    E-Print Network [OSTI]

    Gross, E.K.U.

    High harmonic generation in hydrogen and helium atoms subject to one{ and two{color laser pulses Surzburg Germany Abstract. We present simulations of harmonic generation in hydrogen and helium solving for the generation of intense high{order harmonics are discussed. 1. Introduction Since the discovery of harmonic

  10. Harmonic oscillator in a one-dimensional box

    E-Print Network [OSTI]

    Paolo Amore; Francisco M. Fernandez

    2009-07-31

    We study a harmonic molecule confined to a one--dimensional box with impenetrable walls. We explicitly consider the symmetry of the problem for the cases of different and equal masses. We propose suitable variational functions and compare the approximate energies given by the variation method and perturbation theory with accurate numerical ones for a wide range of values of the box length. We analyze the limits of small and large box size.

  11. Measuring non-linear functionals of quantum harmonic oscillator states

    E-Print Network [OSTI]

    K. L. Pregnell

    2005-11-01

    Using only linear interactions and a local parity measurement we show how entanglement can be detected between two harmonic oscillators. The scheme generalizes to measure both linear and non-linear functionals of an arbitrary oscillator state. This leads to many applications including purity tests, eigenvalue estimation, entropy and distance measures - all without the need for non-linear interactions or complete state reconstruction. Remarkably, experimental realization of the proposed scheme is already within the reach of current technology with linear optics.

  12. Using Coupled Harmonic Oscillators to Model Some Greenhouse Gas Molecules

    SciTech Connect (OSTI)

    Go, Clark Kendrick C.; Maquiling, Joel T.

    2010-07-28

    Common greenhouse gas molecules SF{sub 6}, NO{sub 2}, CH{sub 4}, and CO{sub 2} are modeled as harmonic oscillators whose potential and kinetic energies are derived. Using the Euler-Lagrange equation, their equations of motion are derived and their phase portraits are plotted. The authors use these data to attempt to explain the lifespan of these gases in the atmosphere.

  13. Theory of the strongly-damped quantum harmonic oscillator

    E-Print Network [OSTI]

    Stephen M. Barnett; James D. Cresser; Sarah Croke

    2015-08-10

    We analyse the properties of a strongly-damped quantum harmonic oscillator by means of an exact diagonalisation of the full Hamiltonian, including both the oscillator and the reservoir degrees of freedom to which it is coupled. Many of the properties of the oscillator, including its steady-state properties and entanglement with the reservoir can be understood and quantified in terms of a simple probability density, which we may associate with the ground-state frequency spectrum of the oscillator.

  14. Vacuum high harmonic generation in the shock regime

    E-Print Network [OSTI]

    Böhl, P; Ruhl, H

    2015-01-01

    Electrodynamics becomes nonlinear and permits the self-interaction of fields when the quantised nature of vacuum states is taken into account. The effect on a plane probe pulse propagating through a stronger constant crossed background is calculated using numerical simulation and by analytically solving the corresponding wave equation. The electromagnetic shock resulting from vacuum high harmonic generation is investigated and a nonlinear shock parameter identified.

  15. Harmonizing Technological Innovation and End-of-Life Strategy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,ExecutiveFinancing ProgramsDepartment of EnergyEnergy Harmonization

  16. Embedded Temporal Difference in Life Cycle Assessment: Case Study on VW Golf A4 Car

    E-Print Network [OSTI]

    Yuan, Chris; Simon, Rachel; Natalie Mady; Dornfeld, David

    2009-01-01

    International Journal of LCA 8(1), pp. 8-18, 2003. H. A. UdoI: Landfill Model. ” Int J LCA 3 (3) pp. 158-168, 1998. R.Modelling in the Dutch LCA Methodology Project. In: Guinée

  17. Nonlinear Power Spectral Densities for the Harmonic Oscillator

    E-Print Network [OSTI]

    B. D. Hauer; J. Maciejko; J. P. Davis

    2015-06-13

    In this paper, we discuss a general procedure by which nonlinear power spectral densities (PSDs) of the harmonic oscillator can be calculated in both the quantum and classical regimes. We begin with an introduction of the damped and undamped classical harmonic oscillator, followed by an overview of the quantum mechanical description of this system. A brief review of both the classical and quantum autocorrelation functions (ACFs) and PSDs follow. We then introduce a general method by which the kth-order PSD for the harmonic oscillator can be calculated, where $k$ is any positive integer. This formulation is verified by first reproducing the known results for the $k = 1$ case of the linear PSD. It is then extended to calculate the second-order PSD, useful in the field of quantum measurement, corresponding to the $k = 2$ case of the generalized method. In this process, damping is included into each of the quantum linear and quadratic PSDs, producing realistic models for the PSDs found in experiment. These quantum PSDs are shown to obey the correspondence principle by matching with what was calculated for their classical counterparts in the high temperature, high-Q limit. Finally, we demonstrate that our results can be reproduced using the fluctuation-dissipation theorem, providing an independent check of our resultant PSDs.

  18. Single-shot fluctuations in waveguided high-harmonic generation

    E-Print Network [OSTI]

    Goh, S J; van der Slot, P J M; Bastiaens, H J M; Herek, J; Biedron, S G; Danailov, M B; Milton, S V; Boller, K -J

    2015-01-01

    For exploring the application potential of coherent soft x-ray (SXR) and extreme ultraviolet radiation (XUV) provided by high-harmonic generation, it is important to characterize the central output parameters. Of specific importance are pulse-to-pulse (shot-to-shot) fluctuations of the high-harmonic output energy, fluctuations of the direction of the emission (pointing instabilities), and fluctuations of the beam divergence and shape that reduce the spatial coherence. We present the first single-shot measurements of waveguided high-harmonic generation in a waveguided (capillary-based) geometry. Using a capillary waveguide filled with Argon gas as the nonlinear medium, we provide the first characterization of shot-to-shot fluctuations of the pulse energy, of the divergence and of the beam pointing. We record the strength of these fluctuations vs. two basic input parameters, which are the drive laser pulse energy and the gas pressure in the capillary waveguide. In correlation measurements between single-shot dr...

  19. Final Scientific/Technical Report for DE-FG03-02NA00063 Coherent imaging of laser-plasma interactions using XUV high harmonic radiation

    SciTech Connect (OSTI)

    Henry Kapteyn

    2006-06-06

    The objective of this project was to develop experimental techniques for using coherent extreme-ultraviolet (EUV) radiation generated using the high-order harmonic generation technique, as an illumination source for studies of high-density plasmas relevant to the stockpile stewardship mission. In this project, we made considerable progress, including the first demonstration of imaging of dynamic processes using this coherent ultrashort pulse light. This work also stimulated considerable progress in the development of the required ultrashort EUV pulses, and in the development of new laser technologies that have been commercialized. We also demonstrated the first EUV sources that exhibit full intrinsic optical coherence. This work resulted in 12 publications.

  20. Project Controls

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1997-03-28

    Project controls are systems used to plan, schedule, budget, and measure the performance of a project/program. The cost estimation package is one of the documents that is used to establish the baseline for project controls. This chapter gives a brief description of project controls and the role the cost estimation package plays.

  1. Harmonic oscillator in a background magnetic field in noncommutative quantum phase-space

    E-Print Network [OSTI]

    Joseph Ben Geloun; Sunandan Gangopadhyay; Frederik G Scholtz

    2009-01-22

    We solve explicitly the two-dimensional harmonic oscillator and the harmonic oscillator in a background magnetic field in noncommutative phase-space without making use of any type of representation. A key observation that we make is that for a specific choice of the noncommutative parameters, the time reversal symmetry of the systems get restored since the energy spectrum becomes degenerate. This is in contrast to the noncommutative configuration space where the time reversal symmetry of the harmonic oscillator is always broken.

  2. A multiple deep attenuation frequency window for harmonic analysis in power systems

    SciTech Connect (OSTI)

    Daponte, P.; Falcomata, G. . Dept. di Elettronica Informatica e Sistemistica); Testa, A. . Dipt. di Ingegneria Elettrica)

    1994-04-01

    A novel window is presented and applied in electrical power system harmonic analysis. The goal of increasing the resolvability of low magnitude non-harmonic tones close in frequency to higher magnitude harmonics and the detectability of very low magnitude high frequency harmonics is pursued. The proposed window is derived from the Tseng window; its spectrum can be modeled in the synthesis stage and it is characterized by a narrow width main lobe and by sidelobes which are very low in correspondence to some specified frequencies. Numerical experiments demonstrate the performances and the usefulness of the new window in resolving periodic distorted waveforms in power systems.

  3. Numerical studies of third-harmonic generation in laser filament in air perturbed by plasma spot

    SciTech Connect (OSTI)

    Feng Liubin; Lu Xin; Liu Xiaolong; Li Yutong; Chen Liming; Ma Jinglong; Dong Quanli; Wang Weimin; Xi Tingting; Sheng Zhengming; Zhang Jie; He Duanwei

    2012-07-15

    Third-harmonic emission from laser filament intercepted by plasma spot is studied by numerical simulations. Significant enhancement of the third-harmonic generation is obtained due to the disturbance of the additional plasma. The contribution of the pure plasma effect and the possible plasma-enhanced third-order susceptibility on the third-harmonic generation enhancement are compared. It is shown that the plasma induced cancellation of destructive interference [Y. Liu et al., Opt. Commun. 284, 4706 (2011)] of two-colored filament is the dominant mechanism of the enhancement of third-harmonic generation.

  4. Harmonic coordinates in the string and membrane equations

    E-Print Network [OSTI]

    Chun-Lei He; Shou-Jun Huang

    2010-04-16

    In this note, we first show that the solutions to Cauchy problems for two versions of relativistic string and membrane equations are diffeomorphic. Then we investigate the coordinates transformation presented in Ref. [9] (see (2.20) in Ref. [9]) which plays an important role in the study on the dynamics of the motion of string in Minkowski space. This kind of transformed coordinates are harmonic coordinates, and the nonlinear relativistic string equations can be straightforwardly simplified into linear wave equations under this transformation.

  5. Temperature-insensitive phase-matched optical harmonic conversion crystal

    DOE Patents [OSTI]

    Barker, C.E.; Eimerl, D.; Velsko, S.P.; Roberts, D.

    1993-11-23

    Temperature-insensitive, phase-matched harmonic frequency conversion of laser light at a preferred wavelength of 1.064 microns can be achieved by use of a crystal of deuterated l-arginine phosphate. The crystal is cut and oriented so that the laser light propagates inside the crystal along one of several required directions, which correspond to a temperature-insensitive, phase-matching locus. The method of measuring and calculating the temperature-insensitive, phase-matching angles can be extended to other fundamental wavelengths and other crystal compositions. 12 figures.

  6. On the harmonic oscillator on the Lobachevsky plane

    E-Print Network [OSTI]

    P. Stovicek; M. Tusek

    2007-09-24

    We introduce the harmonic oscillator on the Lobachevsky plane with the aid of the potential $V(r)=(a^2\\omega^2/4)sinh(r/a)^2$ where $a$ is the curvature radius and $r$ is the geodesic distance from a fixed center. Thus the potential is rotationally symmetric and unbounded likewise as in the Euclidean case. The eigenvalue equation leads to the differential equation of spheroidal functions. We provide a basic numerical analysis of eigenvalues and eigenfunctions in the case when the value of the angular momentum, $m$, equals 0.

  7. Harmonic Initial-Boundary Evolution in General Relativity

    E-Print Network [OSTI]

    Maria C. Babiuc; Bela Szilagyi; Jeffrey Winicour

    2006-03-14

    Computational techniques which establish the stability of an evolution-boundary algorithm for a model wave equation with shift are incorporated into a well-posed version of the initial-boundary value problem for gravitational theory in harmonic coordinates. The resulting algorithm is implemented as a 3-dimensional numerical code which we demonstrate to provide stable, convergent Cauchy evolution in gauge wave and shifted gauge wave testbeds. Code performance is compared for Dirichlet, Neumann and Sommerfeld boundary conditions and for boundary conditions which explicitly incorporate constraint preservation. The results are used to assess strategies for obtaining physically realistic boundary data by means of Cauchy-characteristic matching.

  8. Generalized energy equipartition in harmonic oscillators driven by active baths

    E-Print Network [OSTI]

    Claudio Maggi; Matteo Paoluzzi; Nicola Pellicciotta; Alessia Lepore; Luca Angelani; Roberto Di Leonardo

    2015-06-26

    We study experimentally and numerically the dynamics of colloidal beads confined by a harmonic potential in a bath of swimming E. coli bacteria. The resulting dynamics is well approximated by a Langevin equation for an overdamped oscillator driven by the combination of a white thermal noise and an exponentially correlated active noise. This scenario leads to a simple generalization of the equipartition theorem resulting in the coexistence of two different effective temperatures that govern dynamics along the flat and the curved directions in the potential landscape.

  9. Quantum Energy Teleportation with a Linear Harmonic Chain

    E-Print Network [OSTI]

    Yasusada Nambu; Masahiro Hotta

    2010-10-14

    A protocol of quantum energy teleportation is proposed for a one-dimensional harmonic chain. A coherent-state POVM measurement is performed to coupled oscillators of the chain in the ground state accompanied by energy infusion to the system. This measurement consumes a part of ground state entanglement. Depending on the measurement result, a displacement operation is performed on a distant oscillator accompanied by energy extraction from the zero-point fluctuation of the oscillator. We find that the amount of consumed entanglement is bounded from below by a positive value that is proportional to the amount of teleported energy.

  10. A theoretical basis for the Harmonic Balance Method

    E-Print Network [OSTI]

    García-Saldaña, Johanna D

    2012-01-01

    The Harmonic Balance method provides a heuristic approach for finding truncated Fourier series as an approximation to the periodic solutions of ordinary differential equations. Another natural way for obtaining these type of approximations consists in applying numerical methods. In this paper we recover the pioneering results of Stokes and Urabe that provide a theoretical basis for proving that near these truncated series, whatever is the way they have been obtained, there are actual periodic solutions of the equation. We will restrict our attention to one-dimensional non-autonomous ordinary differential equations and we apply the results obtained to a couple of concrete examples coming from planar autonomous systems.

  11. Thermal conductivity in harmonic lattices with random collisions

    E-Print Network [OSTI]

    Giada Basile; Cédric Bernardin; Milton Jara; Tomasz Komorowski; Stefano Olla

    2015-09-08

    We review recent rigorous mathematical results about the macroscopic behaviour of harmonic chains with the dynamics perturbed by a random exchange of velocities between nearest neighbor particles. The random exchange models the effects of nonlinearities of anharmonic chains and the resulting dynamics have similar macroscopic behaviour. In particular there is a superdiffusion of energy for unpinned acoustic chains. The corresponding evolution of the temperature profile is governed by a fractional heat equation. In non-acoustic chains we have normal diffusivity, even if momentum is conserved.

  12. Can Classical Linear Harmonic Oscillator Hold Chaotic (Fractal) Dynamics

    E-Print Network [OSTI]

    Vladan Pankovi?

    2009-08-16

    In this work a classical linear harmonic oscillator, evolving during a small time interval (so that simple non-linear, second order Taylor approximation of the dynamics is satisfied) and restarting (by a mechanism) in a strictly chosen series of the time moments, is considered. It is shown that given linear oscillator behaves dynamically analogously to discrete logistic equation, which, as an especial case, includes chaotic (fractal) behaviour too. (All this refers too on the analogous quantum systems, e.g. ammonia molecule with simple vibration dynamics of the atoms many times perturbed by measurements in strictly defined time moments.

  13. A non-conforming 3D spherical harmonic transport solver

    SciTech Connect (OSTI)

    Van Criekingen, S.

    2006-07-01

    A new 3D transport solver for the time-independent Boltzmann transport equation has been developed. This solver is based on the second-order even-parity form of the transport equation. The angular discretization is performed through the expansion of the angular neutron flux in spherical harmonics (PN method). The novelty of this solver is the use of non-conforming finite elements for the spatial discretization. Such elements lead to a discontinuous flux approximation. This interface continuity requirement relaxation property is shared with mixed-dual formulations such as the ones based on Raviart-Thomas finite elements. Encouraging numerical results are presented. (authors)

  14. Harmonization of Federal and International Regulations | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,ExecutiveFinancing ProgramsDepartment of EnergyEnergy Harmonization of

  15. Rate-Harmonized Scheduling for Saving Energy Anthony Rowe Karthik Lakshmanan Haifeng Zhu Ragunathan (Raj) Rajkumar

    E-Print Network [OSTI]

    Rowe, Anthony

    Rate-Harmonized Scheduling for Saving Energy Anthony Rowe Karthik Lakshmanan Haifeng Zhu Ragunathan mode, substantially more energy savings can be obtained but it requires a significant amount of time such that processor idle times are lumped together. We next introduce the Energy-Saving Rate-Harmonized Scheduler

  16. A Harmonic Potential Approach for Simultaneous Planning and Control of a Generic UAV Platform

    E-Print Network [OSTI]

    Masoud, Ahmad A.

    A Harmonic Potential Approach for Simultaneous Planning and Control of a Generic UAV Platform Ahmad and control of a large variety of unmanned aerial vehicles (UAVs) is tackled using the harmonic potential to regulate the velocity of the UAV concerned in a manner that would propel the UAV to a target point while

  17. Aalborg Universitet Harmonic Analysis of Offshore Wind Farms with Full Converter Wind Turbines

    E-Print Network [OSTI]

    Bak, Claus Leth

    Aalborg Universitet Harmonic Analysis of Offshore Wind Farms with Full Converter Wind Turbines Analysis of Offshore Wind Farms with Full Converter Wind Turbines. In Proceeding of the 8th International.aau.dk on: juli 06, 2015 #12; Abstract--This paper presents the harmonic analysis of offshore wind farm (OWF

  18. Circular Harmonic Decomposition Approach for Numerical Inversion of Circular Radon Transforms

    E-Print Network [OSTI]

    Louis, Alfred K.

    Circular Harmonic Decomposition Approach for Numerical Inversion of Circular Radon Transforms Gaël@num.uni-sb.de ABSTRACT Numerical inversions via circular harmonic decomposition for two classes of circular Radon transforms are established. The first class deals with the Radon transform (RT) de- fined on circular arcs

  19. EXPONENTIAL RADON TRANSFORM INVERSION BASED ON HARMONIC ANALYSIS OF THE EUCLIDEAN MOTION GROUP

    E-Print Network [OSTI]

    Yazici, Birsen

    EXPONENTIAL RADON TRANSFORM INVERSION BASED ON HARMONIC ANALYSIS OF THE EUCLIDEAN MOTION GROUP Can Engineering Troy, NY ABSTRACT This paper presents a new method for the exponential Radon trans- form inversion based on harmonic analysis of the Euclidean mo- tion group (M(2)). The exponential Radon transform

  20. Attosecond laser pulse synthesis using bichromatic high-order harmonic generation Avner Fleischer and Nimrod Moiseyev

    E-Print Network [OSTI]

    Moiseyev, Nimrod

    2006 We analyze the dynamical symmetries and the selection rules relevant to the process of production of high-order harmonics as a result of irradiating an atom with strong, continuous bichromatic laser spectrum of harmonics could be a source for the production of attosecond light pulses. We demonstrate our

  1. Hydrogen Generation from Water Disassociation Using Small Currents and Harmonics Trien N. Nguyen1

    E-Print Network [OSTI]

    Zhou, Yaoqi

    Hydrogen Generation from Water Disassociation Using Small Currents and Harmonics Trien N. Nguyen1 1 Department of Physics, Purdue School of Science Hydrogen can be produced cheaply and efficiently from water sources using a combination of harmonics and small currents. Hydrogen is a clean and virtually

  2. ZAGIER-TYPE DUALITIES AND LIFTING MAPS FOR HARMONIC MAASS-JACOBI FORMS

    E-Print Network [OSTI]

    Bringmann, Kathrin

    ZAGIER-TYPE DUALITIES AND LIFTING MAPS FOR HARMONIC MAASS-JACOBI FORMS KATHRIN BRINGMANN AND OLAV K. RICHTER Abstract. The real-analytic Jacobi forms of Zwegers' Ph.D. thesis play an important role. In this paper, we introduce harmonic Maass-Jacobi forms, which include the classical Jacobi forms as well

  3. Abstract--Previously, we introduced a new Harmonic Motion Imaging (HMI) technique for simultaneous monitoring and

    E-Print Network [OSTI]

    Konofagou, Elisa E.

    beams) that has a stable focal zone for the applied harmonic radiation force. The harmonic radiation tissues remain unheated. The ability of HIFU to cause irreversible cell damage in tissues has received are with the Department of Biomedical Engineering of Columbia University, New York, NY 10027 phone: 212- 342-1611; fax

  4. Noncollinear second-harmonic generation in sub-micrometer-poled RbTiOPO4

    E-Print Network [OSTI]

    Arie, Ady

    Noncollinear second-harmonic generation in sub-micrometer-poled RbTiOPO4 S. Moscovich, A. Arie, R generated noncollinear quasi-phase-matched second harmonic wave in an RbTiOPO4 crystal that was poled using systematic nonlinear frequency conversion study of samples produced by the HV-AFM method. The short poling

  5. Optical second-harmonic generation selection rules and resonances in buried oxide interfaces

    E-Print Network [OSTI]

    Marrucci, Lorenzo

    Optical second-harmonic generation selection rules and resonances in buried oxide interfaces-two-dimensional electron gas at the interface between the band insulators LaAlO3 and SrTiO3 is still not fully understood. Interface- sensitive optical second-harmonic spectroscopy can shed light on this mechanism, by accessing

  6. Performance study of a soft X-ray harmonic generation FEL seeded with an EUV laser pulse

    E-Print Network [OSTI]

    Gullans, M.; Wurtele, J.S.; Penn, G.; Zholents, A.A.

    2007-01-01

    X-ray Harmonic Generation FEL Seeded with an EUV Laser PulseX-ray harmonic generation FEL seeded with an EUV laser pulseof a free electron laser (FEL) using a low-power extreme

  7. project management

    National Nuclear Security Administration (NNSA)

    3%2A en Project Management and Systems Support http:www.nnsa.energy.govaboutusouroperationsapmprojectmanagementandsystemssupport

  8. Project Complete

    Broader source: Energy.gov [DOE]

    DOE has published its Record of Decision announcing and explaining DOE’s chosen project alternative and describing any commitments for mitigating potential environmental impacts. The NEPA process...

  9. Project Construction

    Broader source: Energy.gov [DOE]

    Integrating renewable energy into Federal new construction or major renovations requires effective structuring of the construction team and project schedule. This overview discusses key construction team considerations for renewable energy as well as timing and expectations for the construction phase. The project construction phase begins after a project is completely designed and the construction documents (100%) have been issued. Construction team skills and experience with renewable energy technologies are crucial during construction, as is how the integration of renewable energy affects the project construction schedule.

  10. Research Projects

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

    projects that involve UCSD faculty members and graduate students from the structural engineering (SE), mechanical and aerospace engineering (MAE), electrical and computer...

  11. RESEARCH PROJECTS February 13

    E-Print Network [OSTI]

    Schenato, Luca

    RESEARCH PROJECTS FP7 February 13 #12; FP7 COOPERATION #12; INTERNATIONAL RESEARCH PROJECTS FP7 COOPERATION ENERGY PROJECT ACRONYM: EFONET PROJECT TITLE: Energy foresight network PROJECT

  12. Deuterium Beam Acceleration with 3rd Harmonic ICRH in Joint European Torus: Sawtooth Stabilization and Alfvén Eigenmodes

    E-Print Network [OSTI]

    Deuterium Beam Acceleration with 3rd Harmonic ICRH in Joint European Torus: Sawtooth Stabilization and Alfvén Eigenmodes

  13. Thermal transport in out of equilibrium quantum harmonic chains

    E-Print Network [OSTI]

    F. Nicacio; A. Ferraro; A. Imparato; M. Paternostro; F. L. Semião

    2015-04-15

    We address the problem of heat transport in a chain of coupled quantum harmonic oscillators, exposed to the influences of local environments of various nature, stressing the effects that the specific nature of the environment has on the phenomenology of the transport process. We study in detail the behavior of thermodynamically relevant quantities such as heat currents and mean energies of the oscillators, establishing rigorous analytical conditions for the existence of a steady state, whose features we analyse carefully. In particular we assess the conditions that should be faced to recover trends reminiscent of the classical Fourier law of heat conduction and highlight how such a possibility depends on the environment linked to our system.

  14. Exact energy distribution function in time-dependent harmonic oscillator

    E-Print Network [OSTI]

    Marko Robnik; Valery G. Romanovski; Hans-Juergen Stoeckmann

    2006-08-11

    Following a recent work by Robnik and Romanovski (J.Phys.A: Math.Gen. {\\bf 39} (2006) L35, Open Syst. & Infor. Dyn. {\\bf 13} (2006) 197-222) we derive the explicit formula for the universal distribution function of the final energies in a time-dependent 1D harmonic oscillator, whose functional form does not depend on the details of the frequency $\\omega (t)$, and is closely related to the conservation of the adiabatic invariant. The normalized distribution function is $P(x) = \\pi^{-1} (2\\mu^2 - x^2)^{-{1/2}}$, where $x=E_1- \\bar{E_1}$, $E_1$ is the final energy, $\\bar{E_1}$ is its average value, and $\\mu^2$ is the variance of $E_1$. $\\bar{E_1}$ and $\\mu^2$ can be calculated exactly using the WKB approach to all orders.

  15. RF physics of ICWC discharge at high cyclotron harmonics

    SciTech Connect (OSTI)

    Lyssoivan, A.; Van Eester, D.; Wauters, T.; Vervier, M.; Van Schoor, M. [Association Euratom-Belgian State, LPP-ERM-KMS, 1000 Brussels (Belgium); Bobkov, V.; Rohde, V.; Schneider, P. [Association Euratom-IPP, Max-Planck Institut für Plasmaphysik, 85748 Garching (Germany); Douai, D.; Kogut, D. [Association Euratom-CEA, CEA, IRFM, 13108 St Paul lez Durance (France); Kreter, A.; Möller, S.; Philipps, V.; Sergienko, G. [Association Euratom-IEK-4, Forschungszentrum Jülich, 52425 Jülich (Germany); Moiseenko, V. [Institute of Plasma Physics NSC KIPT, 61108 Kharkiv (Ukraine); Noterdaeme, J.-M. [Association Euratom-IPP, Max-Planck Institut für Plasmaphysik, 85748 Garching, Germany and Ghent University, 9000 Ghent (Belgium); Collaboration: TEXTOR Team; ASDEX Upgrade Team

    2014-02-12

    Recent experiments on Ion Cyclotron Wall Conditioning (ICWC) performed in tokamaks TEXTOR and ASDEX Upgrade with standard ICRF antennas operated at fixed frequencies but variable toroidal magnetic field demonstrated rather contrasting parameters of ICWC discharge in scenarios with on-axis fundamental ion cyclotron resonance (ICR) for protons,?=?{sub H+}, and with its high cyclotron harmonics (HCH), ?=10?{sub cH+}? HCH scenario: very high antenna coupling to low density RF plasmas (P{sub pl}?0.9P{sub RF-G}) and low energy Maxwellian distribution of CX hydrogen atoms with temperature T{sub H}?350 eV. Fundamental ICR: lower antenna-plasma coupling efficiency (by factor of about 1.5 times) and generation of high energy non-Maxwellian CX hydrogen atoms (with local energy E{sub ?H} ?1.0 keV). In the present paper, we analyze the obtained experimental results numerically using (i) newly developed 0-D transport code describing the process of plasma production with electron and ion collisional ionization in helium-hydrogen gas mixture and (ii) earlier developed 1-D Dispersion Relation Solver accounting for finite temperature effects and collision absorption mechanisms for all plasma species in addition to conventionally examined Landau/TTPM damping for electrons and cyclotron absorption for ions. The numerical study of plasma production in helium with minor hydrogen content in low and high toroidal magnetic fields is presented. The investigation of the excitation, conversion and absorption of plasma waves as function of B{sub T}-field suggests that only fast waves (FW) may give a crucial impact on antenna coupling and characteristics of the ICWC discharge using standard poloidally polarized ICRF antennas designed to couple RF power mainly to FW. The collisional (non-resonant) absorption by electrons and ions and IC absorption by resonant ions of minor concentration in low T{sub e} plasmas is studied at fundamental ICR and its high harmonics.

  16. HARMONIC FUNCTIONS FOR SEA-SURFACE TEMPERATURES AND SALINITIES, KOKO HEAD, OAHU, 1956-69, AND SEA-SURFACE

    E-Print Network [OSTI]

    HARMONIC FUNCTIONS FOR SEA-SURFACE TEMPERATURES AND SALINITIES, KOKO HEAD, OAHU, 1956-69, AND SEA-SURFACE TEMPERATURES, CHRISTMAS ISLAND, 1954-69 GUNTHER It SECKEL' AND MARIAN Y. Y. YONG' ABSTRACT Harmonic functions, with daily sampling, are on average 0.07° C. Harmonic analysis spanning the entire sampling duration shows

  17. p-HARMONIC MEASURE IS NOT SUBADDITIVE JOSE G. LLORENTE, JUAN J. MANFREDI, AND JANG-MEI WU

    E-Print Network [OSTI]

    Wu, Jang-Mei

    p-HARMONIC MEASURE IS NOT SUBADDITIVE JOS´E G. LLORENTE, JUAN J. MANFREDI, AND JANG-MEI WU. When 1 harmonic mea- sure on the boundary of the half plane R2 + is not subadditive. In fact, there are finitely many sets E1, E2,...,E on R, of p-harmonic measure zero, such that E1

  18. PHYSICAL REVIEW A 91, 023402 (2015) Transition from perturbative to nonperturbative interaction in low-order-harmonic generation

    E-Print Network [OSTI]

    Becker, Andreas

    2015-01-01

    in low-order-harmonic generation A. Spott, A. Becker, and A. Jaro´n-Becker JILA and Department of Physics 2015) We present results of ab initio numerical calculations for low-order-harmonic generation as well of the susceptibilities for third- and fifth-order-harmonic generation. We find that the transition from perturbative

  19. Harmonic content and time variation of electron energy distributions in high-plasma-density, low-pressure inductively coupled discharges

    E-Print Network [OSTI]

    Kushner, Mark

    Harmonic content and time variation of electron energy distributions in high-plasma-density, low-the-fly'' OTF Monte Carlo method. The OTF method directly computes the harmonic content of the EEDs using was incorporated into a two-dimensional plasma equipment model to investigate the harmonic content of the EEDs

  20. September 15, 1997 / Vol. 22, No. 18 / OPTICS LETTERS 1385 Modification of solitary waves by third-harmonic generation

    E-Print Network [OSTI]

    with the wave's third harmonic. Indeed, if a slightly mismatched process of third-harmonic generation leadsSeptember 15, 1997 / Vol. 22, No. 18 / OPTICS LETTERS 1385 Modification of solitary waves by third-harmonic generation Rowland A. Sammut and Alexander V. Buryak School of Mathematics and Statistics, University College

  1. Campbell Soup Company: Harmonizing Processes and Empowering Workers

    E-Print Network [OSTI]

    Ross, Jeanne W.

    2008-06-01

    In 2007 Campbell Soup Company was implementing Project Harmony: a multi-year effort to implement SAP and create more standardized and integrated business processes across

  2. Projection and Galaxy Clustering Fourier Spectra

    E-Print Network [OSTI]

    J. N. Fry; David Thomas

    1999-09-13

    Second order perturbation theory predicts a specific dependence of the bispectrum, or three-point correlation function in the Fourier transform domain, on the shape of the configuration of its three wave vector arguments, which can be taken as a signature of structure formed by gravitational instability. Comparing this known dependence on configuration shape with the weak shape dependence of the galaxy bispectrum has been suggested as an indication of bias in the galaxy distribution. However, to interpret results obtained from projected catalogs, we must first understand the effects of projection on this shape dependence. We present expressions for the projected power spectrum and bispectrum in both Cartesian and spherical geometries, and we examine the effects of projection on the predicted bispectrum with particular attention to the dependence on configuration shape. Except for an overall numerical factor, for Cartesian projection with characteristic depth $ \\Dstar $ there is little effect on the shape dependence of the bispectrum for wavelengths small compared to $ \\Dstar $ or projected wavenumbers $ q \\Dstar \\gg 1 $. For angular projection, a scaling law is found for spherical harmonic index $ \\ell \\gg 1 $, but there is always a mixing of scales over the range of the selection function. For large $ \\ell $ it is sufficient to examine a small portion of the sky.

  3. Theoretical studies of high-order harmonic generation: Effects of symmetry, degeneracy, and orientation

    SciTech Connect (OSTI)

    Madsen, C. B.; Madsen, L. B.

    2007-10-15

    Using a quantum-mechanical three-step model, we present numerical calculations of the high-order harmonic generation from four polyatomic molecules. Ethylene (C{sub 2}H{sub 4}) serves as an example where orbital symmetry directly affects the harmonic yield. We treat the case of methane (CH{sub 4}) to address the high-order harmonic generation resulting from a molecule with degenerate orbitals. To this end we illustrate how the single-orbital contributions show up in the total high-order harmonic signal. This example illustrates the importance of adding coherently the amplitude contributions from the individual degenerate orbitals. Finally, we study the high-order harmonic generation from propane (C{sub 3}H{sub 8}) and butane (C{sub 4}H{sub 10}). These two molecules, being extended and far from spherical in structure, produce harmonics with nontrivial orientational dependencies. In particular, propane can be oriented so that very high-frequency harmonics are favored, and thus the molecule contains prospects for the generation of uv attosecond pulses.

  4. Analysis of higher harmonic contamination with a modified approach using a grating analyser

    SciTech Connect (OSTI)

    Gupta, Rajkumar Modi, Mohammed H.; Lodha, G. S.; Kumar, M.; Chakera, J. A.

    2014-04-15

    Soft x-ray spectra of the toroidal grating monochromator (TGM) at the reflectivity beamline of Indus-1 synchrotron source are analyzed for higher harmonic contribution. A diffraction grating of central line spacing 1200 l/mm is used to disperse the monochromatic beam received from TGM to quantify the harmonic contents in the 50–360 Å wavelength range. In order to calculate the harmonic contamination, conventionally the intensity of higher order peak is divided by first order peak intensity of the desired wavelength. This approach is found to give wrong estimate as first order peak itself is overlapped by higher order peaks. In the present study, a modified approach has been proposed to calculate harmonic contamination where the intensity contributions of overlapping orders have been removed from the first order diffraction peak of the desired wavelength. It is found that the order contamination in the TGM spectra is less than 15% in the wavelength range of 90–180 Å. The total harmonic contribution increases from 6%–60% in the wavelength range of 150–260 Å. The critical wavelength of Indus-1 is 61 Å hence the harmonic contamination below 90 Å is significantly low. The results obtained with modified approach match well with those obtained by quantitative analysis of multilayer reflectivity data. The obtained higher harmonics data are used to fit the transmission of aluminum edge filter in the 120–360 Å wavelength range.

  5. Electro-optic harmonic conversion to switch a laser beam out of a cavity

    DOE Patents [OSTI]

    Haas, Roger A. (Pleasanton, CA); Henesian, Mark A. (Livermore, CA)

    1987-01-01

    The invention is a switch to permit a laser beam to escape a laser cavity through the use of an externally applied electric field across a harmonic conversion crystal. Amplification takes place in the laser cavity, and then the laser beam is switched out by the laser light being harmonically converted with dichroic or polarization sensitive elements present to alter the optical path of the harmonically converted laser light. Modulation of the laser beam can also be accomplished by varying the external electric field.

  6. Third harmonic stimulated Raman backscattering of laser in a magnetized plasma

    SciTech Connect (OSTI)

    Paknezhad, Alireza; Dorranian, Davoud

    2013-09-15

    This article studies the nonlinear Raman shifted third harmonic backscattering of an intense extraordinary laser wave through a homogenous transversely magnetized cold plasma. Due to the relativistic nonlinearity, the plasma dynamic is modified in the presence of transversely magnetic field, and this can generate the third harmonic scattered wave and an electrostatic upper hybrid wave via the Raman scattering process. Using the nonlinear wave equation, the mechanism of nonlinear third harmonic Raman scattering is discussed in detail to obtain the maximum growth rate of instability in the mildly relativistic regime. The growth rate decreases as the static magnetic field increases. It also increases with the pump wave amplitude.

  7. Generation and coherent control of even-order harmonics driven by intense frequency-comb and cavity-mode fields inside a fsEC

    E-Print Network [OSTI]

    Chu, Shih-I

    Generation and coherent control of even-order harmonics driven by intense frequency-comb and cavity) doi:10.1088/0953-4075/46/14/145403 Generation and coherent control of even-order harmonics driven, resulting in the generation of even-order harmonics. The high-order harmonic generation (HHG) from a two

  8. High harmonic generation from periodic potentials driven by few-cycle laser pulses

    E-Print Network [OSTI]

    Guan, Zhong; Bian, Xue-Bin

    2015-01-01

    We investigate the high harmonic generation (HHG) from solids by simulating the dynamics of a single active electron in periodic potentials. The corresponding time-dependent Schr\\"odinger equations (TDSE) are solved numerically by using B-spline basis sets in coordinate space. The energy band structure and wave vectors can be directly retrived from the eigenfunctions. The harmonic spectra obtained agree well with the results simulated by TDSE in $k$ space using Bloch states and show a two-plateau structure. Both of the cutoff energies of the two plateaus in the harmonic spectrum scale linearly with the field strength. We also study HHG driven by intense few-cycle laser pulses and find that the cutoff energy of the harmonic spectrum is as sensitive to the changes of the carrier envelope phase, as to HHG from gas samples, which suggests recollision pictures in HHG as found by recent experiments (Nature {\\bf 522}, 462 (2015)).

  9. On non-acceptibility of variational based calculation in $PT$ symmetrized complex Harmonic oscillators: Direct study

    E-Print Network [OSTI]

    Biswanath Rath

    2015-06-09

    We notice through a direct calculation that any variational based calculation on $PT$ symmetrized complex Harmonic Oscillator can lead to breakdown of $PT$ symmetry condition on real spectra. Two different types of oscillators have been tested yielding an uniform conclusion.

  10. A continuous-wave second harmonic gyrotron oscillator at 460 GHz

    E-Print Network [OSTI]

    Hornstein, Melissa K. (Melissa Kristen), 1977-

    2005-01-01

    We report the short pulse and CW operation of a 460 GHz gyrotron oscillator both at the fundamental (near 230 GHz) and second harmonic (near 460 GHz) of electron cyclotron resonance. During operation in a complete CW regime ...

  11. Nonlinear harmonic modeling of phemt devices for increased power amplifier efficiencies 

    E-Print Network [OSTI]

    Strassner, Bernd Herbert

    1997-01-01

    This thesis is a comprehensive study of how harmonic terminations can greatly increase a power amplifier's efficiency (PAE). To show this improvement, the PHEMT amplifier is biased in the low noise region of operation (L, ...

  12. Generation of octave-spanning multiple harmonics for ultrafast waveform synthesis

    E-Print Network [OSTI]

    Hsu, Wei-Chun

    Up to seven laser harmonics covering more than two octaves in frequency have been generated efficiently in a single PPLT crystal, permitting the synthesis of 1.5 femtosecond pulses in a stable and compact setting.

  13. Understanding and Modeling the Behavior of a Harmonic Drive Gear Transmission

    E-Print Network [OSTI]

    Tuttle, Timothy D.

    1992-05-01

    In my research, I have performed an extensive experimental investigation of harmonic-drive properties such as stiffness, friction, and kinematic error. From my experimental results, I have found that these properties ...

  14. IEEE TRANSACTIONSON PLASMA SCIENCE,VOL. 21, NO. 1, FEBRUARY 1993 Phase-Matched Third Harmonic

    E-Print Network [OSTI]

    IEEE TRANSACTIONSON PLASMA SCIENCE,VOL. 21, NO. 1, FEBRUARY 1993 ~ 105 Phase-Matched Third Harmonic-AC02- The authors are with the Plasma Physics Laboratory, Princeton University, IEEE Log Number 9206344

  15. Representation Discovery in Planning using Harmonic Analysis Jeff Johns and Sarah Osentoski and Sridhar Mahadevan

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Representation Discovery in Planning using Harmonic Analysis Jeff Johns and Sarah Osentoski in AI and cognitive sci- ence, from computer vision (Marr 1982) to problem solv- ing (Amarel 1968

  16. Improved continuous-time higher harmonic control using [Eta] [infinity] methods

    E-Print Network [OSTI]

    Fan, Frank H. (Frank Hsiao)

    2013-01-01

    The helicopter is a versatile aircraft that can take-off and land vertically, hover efficiently, and maneuver in confined space. This versatility is enabled by the main rotor, which also causes undesired harmonic vibration ...

  17. Pitch perception and harmonic resolvability in normal-hearing and hearing-impaired listeners

    E-Print Network [OSTI]

    Bernstein, Joshua G. W

    2006-01-01

    Listeners with sensorineural hearing loss are often impaired in their ability to perceive the pitch associated with the fundamental frequency (FO) of complex harmonic sounds. Four studies investigated the relationship ...

  18. Optical Third-Harmonic Generation in Graphene Hong, Sung-Young...

    Office of Scientific and Technical Information (OSTI)

    Third-Harmonic Generation in Graphene Hong, Sung-Young; Dadap, Jerry I.; Petrone, Nicholas; Yeh, Po-Chun; Hone, James; Osgood, Richard M. American Physical Society None USDOE...

  19. Photovoltaic power converter system with a controller configured to actively compensate load harmonics

    DOE Patents [OSTI]

    de Rooij, Michael Andrew (Clifton Park, NY); Steigerwald, Robert Louis (Burnt Hills, NY); Delgado, Eladio Clemente (Burnt Hills, NY)

    2008-12-16

    Photovoltaic power converter system including a controller configured to reduce load harmonics is provided. The system comprises a photovoltaic array and an inverter electrically coupled to the array to generate an output current for energizing a load connected to the inverter and to a mains grid supply voltage. The system further comprises a controller including a first circuit coupled to receive a load current to measure a harmonic current in the load current. The controller includes a second circuit to generate a fundamental reference drawn by the load. The controller further includes a third circuit for combining the measured harmonic current and the fundamental reference to generate a command output signal for generating the output current for energizing the load connected to the inverter. The photovoltaic system may be configured to compensate harmonic currents that may be drawn by the load.

  20. A Proof-of-Principle Echo-enabled Harmonic Generation Free Electron...

    Office of Scientific and Technical Information (OSTI)

    ThesisDissertation: A Proof-of-Principle Echo-enabled Harmonic Generation Free Electron Laser Experiment at SLAC Citation Details In-Document Search Title: A Proof-of-Principle...

  1. Jacobi operators of quantum counterparts of three-dimensional real Lie algebras over the harmonic oscillator

    E-Print Network [OSTI]

    E. Paal; J. Virkepu

    2010-02-14

    Operadic Lax representations for the harmonic oscillator are used to construct the quantum counterparts of three-dimensional real Lie algebras. The Jacobi operators of these quantum algebras are explicitly calculated.

  2. Oscillator Seeding of a High Gain Harmonic Generation FEL in a Radiator-First Configuration

    E-Print Network [OSTI]

    Gandhi, P.

    2014-01-01

    Proceedings of the 2010 FEL Conference, Malm¨o, Sweden,Proceedings of the 2010 FEL Conference, Malm¨o, Sweden,of a high gain harmonic generation FEL in a radiator-first

  3. NUMERICAL ANALYSIS OF A FINITE ELEMENT SCHEME FOR THE APPROXIMATION OF HARMONIC MAPS INTO SURFACES

    E-Print Network [OSTI]

    Bartels, Soeren

    NUMERICAL ANALYSIS OF A FINITE ELEMENT SCHEME FOR THE APPROXIMATION OF HARMONIC MAPS INTO SURFACES Geometric partial differential equations and their analysis as well as numerical simulation have recently

  4. Generation of Ultra-intense Gamma-ray Train by QED Harmonics

    E-Print Network [OSTI]

    Liu, Chen; Zhang, Xiaomei; Ji, Liangliang; Wang, Wenpeng; Xu, Jiancai; Zhao, Xueyan; Yi, Longqing; Shi, Yin; Zhang, Lingang; Xu, Tongjun; Pei, Zhikun; Xu, Zhizhan

    2015-01-01

    When laser intensity exceeds 10^22W/cm^2, photons with energy above MeV can be generated from high-order harmonics process in the laser-plasma interaction. We find that under such laser intensity, QED effect plays a dominating role in the radiation pattern. Contrast to the gas and relativistic HHG processes, both the occurrence and energy of gamma-ray emission produced by QED harmonics are random and QED harmonics are usually not coherent, while the property of high intensity and ultra-short duration is conserved. Our simulation shows that the period of gamma-ray train is half of the laser period and the peak intensity is 1.4e22W/cm^2. This new harmonic production with QED effects are crucial to light-matter interaction in strong field and can be verified in experiments by 10PW laser facilities in the near future.

  5. Frequency-tunable second-harmonic submillimeter-wave gyrotron oscillators

    E-Print Network [OSTI]

    Sousa, Antonio C. Torrezan de (Antonio Carlos Torrezan de)

    2010-01-01

    This thesis reports the design and experimental demonstration of frequency-tunable submillimeter-wave gyrotrons operating in continuous wave (CW) at the second harmonic of the electron cyclotron frequency. An unprecedented ...

  6. Systematic Review and Harmonization of Life Cycle GHG Emission Estimates for Electricity Generation Technologies (Presentation)

    SciTech Connect (OSTI)

    Heath, G.

    2012-06-01

    This powerpoint presentation to be presented at the World Renewable Energy Forum on May 14, 2012, in Denver, CO, discusses systematic review and harmonization of life cycle GHG emission estimates for electricity generation technologies.

  7. Second-harmonic generation of upper-hybrid radiation in a plasma

    SciTech Connect (OSTI)

    Tewari, D.P.; Tripathi, V.K.

    1980-05-01

    Employing the fluid model for the nonlinear response of electrons, we have studied the phenomenon of second-harmonic generation of upper-hybrid electromagnetic radiation in an inhomogeneous plasma. In the case of laser-pallet fusion, the maximum contribution for harmonic generation comes from the vicinity of the upper-hybrid layer, and the harmonic conversion efficiency turns out to be approx.0.1% at the power densities approx.10/sup 14/ W/cm/sup 2/ (CO/sub 2/ laser), the same order as observed experimentally. In the case of electron cyclotron heating experiments of tokamak, a strong second harmonic must be generated at the cyclotron resonance layer. The wave-number-matching condition could be satisfied in a tokamak, which adds to the conversion efficiency.

  8. Barium Titanate Nanoparticles as Exogenous Contrast Agents in Second Harmonic Optical Coherence Tomography 

    E-Print Network [OSTI]

    Pearson, Jeremy T

    2013-05-06

    I propose and demonstrate a method by which barium titanate nanoparticle clusters can be used as exogenous contrast agents in Second Harmonic Optical Coherence Tomography imaging systems to localize and highlight desired ...

  9. Energy transport by acoustic modes of harmonic lattices

    E-Print Network [OSTI]

    Lisa Harris; Jani Lukkarinen; Stefan Teufel; Florian Theil

    2006-11-21

    We study the large scale evolution of a scalar lattice excitation which satisfies a discrete wave-equation in three dimensions. We assume that the dispersion relation associated to the elastic coupling constants of the wave-equation is acoustic, i.e., it has a singularity of the type |k| near the vanishing wave vector, k=0. To derive equations that describe the macroscopic energy transport we introduce the Wigner transform and change variables so that the spatial and temporal scales are of the order of epsilon. In the continuum limit, which is achieved by sending the parameter epsilon to 0, the Wigner transform disintegrates into three different limit objects: the transform of the weak limit, the H-measure and the Wigner-measure. We demonstrate that these three limit objects satisfy a set of decoupled transport equations: a wave-equation for the weak limit of the rescaled initial data, a dispersive transport equation for the regular limiting Wigner measure, and a geometric optics transport equation for the H-measure limit of the initial data concentrating to k=0. A simple consequence of our result is the complete characterization of energy transport in harmonic lattices with acoustic dispersion relations.

  10. Time-frequency analysis and Harmonic Gaussian Functions

    E-Print Network [OSTI]

    Tokiniaina Ranaivoson; Raoelina Andriambololona; Rakotoson Hanitriarivo

    2013-08-08

    A method for time-frequency analysis is given. The approach utilizes properties of Gaussian distribution, properties of Hermite polynomials and Fourier analysis. We begin by the definitions of a set of functions called harmonic Gaussian functions. Then these functions are used to define a set of transformations,noted T_n, which associate to a function {\\psi},of the time variable t, a set of functions {\\Psi}_n which depend on time, frequency and frequency (or time) standard deviation. Some properties of the transformations T_n and the functions {\\Psi}_n are given. It is proved in particular that the square of the modulus of each function {\\Psi}_n can be interpreted as a representation of the energy distribution of the signal, represented by the function {\\psi}, in the time-frequency plane for a given value of the frequency (or time) standard deviation. It is also shown that the function {\\psi}, can be recovered from the functions{\\Psi}_n.

  11. PROJECT MANGEMENT PLAN EXAMPLES

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

    accelerates the project schedule and significantly reduces the project total life cycle cost. Current Baseline (FY99 MYWP) Revised Project Baseline Project Scope: ...

  12. Pressure dependence of harmonic and an harmonic lattice dynamics in MgO: A ?rst-principles calculation and implications for lattice thermal conductivity

    SciTech Connect (OSTI)

    Tang, Xiaoli [Physics Department, Auburn University, Auburn, Alabama (United States); Dong, Jianjun [Physics Department, Auburn University, Auburn, Alabama (United States)

    2009-05-01

    We report a recent first-principles calculation of harmonic and anharmonic lattice dynamics of MgO. The 2nd order harmonic and 3rd order anharmonic interatomic interaction terms are computed explicitly, and their pressure dependences are discussed. The phonon mode Grueneisen parameters derived based on our calculated 3rd order lattice anharmonicity are in good agreement with those estimated using the finite difference method. The implications for lattice thermal conductivity at high pressure are discussed based on a simple kinetic transport theory.

  13. Attachment of second harmonic-active moiety to molecules for detection of molecules at interfaces

    DOE Patents [OSTI]

    Salafsky, Joshua S.; Eisenthal, Kenneth B.

    2005-10-11

    This invention provides methods of detecting molecules at an interface, which comprise labeling the molecules with a second harmonic-active moiety and detecting the labeled molecules at the interface using a surface selective technique. The invention also provides methods for detecting a molecule in a medium and for determining the orientation of a molecular species within a planar surface using a second harmonic-active moiety and a surface selective technique.

  14. Fluid simulations of frequency effects on nonlinear harmonics in inductively coupled plasma

    SciTech Connect (OSTI)

    Si Xuejiao; Xu Xiang; Wang Younian [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); Zhao Shuxia [School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024 (China); Department of Chemistry, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, BE-2610 Wilrijk-Antwerp (Belgium); Bogaerts, A. [Department of Chemistry, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, BE-2610 Wilrijk-Antwerp (Belgium)

    2011-03-15

    A fluid model is self-consistently established to investigate the harmonic effects in an inductively coupled plasma, where the electromagnetic field is solved by the finite difference time domain technique. The spatiotemporal distribution of harmonic current density, harmonic potential, and other plasma quantities, such as radio frequency power deposition, plasma density, and electron temperature, have been investigated. Distinct differences in current density have been observed when calculated with and without Lorentz force, which indicates that the nonlinear Lorentz force plays an important role in the harmonic effects, especially at low frequencies. Moreover, the even harmonics are larger than the odd harmonics both in the current density and the potential. Finally, the dependence of various plasma quantities with and without the Lorentz force on various driving frequencies is also examined. It is shown that the deposited power density decreases and the depth of penetration increases slightly because of the Lorentz force. The electron density increases distinctly while the electron temperature remains almost the same when the Lorentz force is taken into account.

  15. Cloudnet Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Hogan, Robin

    2008-01-15

    Cloudnet is a research project supported by the European Commission. This project aims to use data obtained quasi-continuously for the development and implementation of cloud remote sensing synergy algorithms. The use of active instruments (lidar and radar) results in detailed vertical profiles of important cloud parameters which cannot be derived from current satellite sensing techniques. A network of three already existing cloud remote sensing stations (CRS-stations) will be operated for a two year period, activities will be co-ordinated, data formats harmonised and analysis of the data performed to evaluate the representation of clouds in four major european weather forecast models.

  16. Cloudnet Project

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Hogan, Robin

    Cloudnet is a research project supported by the European Commission. This project aims to use data obtained quasi-continuously for the development and implementation of cloud remote sensing synergy algorithms. The use of active instruments (lidar and radar) results in detailed vertical profiles of important cloud parameters which cannot be derived from current satellite sensing techniques. A network of three already existing cloud remote sensing stations (CRS-stations) will be operated for a two year period, activities will be co-ordinated, data formats harmonised and analysis of the data performed to evaluate the representation of clouds in four major european weather forecast models.

  17. Project Overview

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgramExemptions |(Conference) | SciTechProjectITER Project

  18. Project Tour

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgramExemptions |(Conference)Project Tour Project Tour See NMSSUP from

  19. Spent Nuclear Fuel project, project management plan

    SciTech Connect (OSTI)

    Fuquay, B.J.

    1995-10-25

    The Hanford Spent Nuclear Fuel Project has been established to safely store spent nuclear fuel at the Hanford Site. This Project Management Plan sets forth the management basis for the Spent Nuclear Fuel Project. The plan applies to all fabrication and construction projects, operation of the Spent Nuclear Fuel Project facilities, and necessary engineering and management functions within the scope of the project

  20. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Malek Charif

    E-Print Network [OSTI]

    ­ the UBC LCA Project ­ which aims to support the development of the field of life cycle assessment (LCA.e. to conduct a limited Life Cycle Assessment (LCA), of assigned building. In this case, the object programs are the main tools used to complete the LCA study. Inputs in the IE model were re

  1. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Jericho Velarde

    E-Print Network [OSTI]

    ­ the UBC LCA Project ­ which aims to support the development of the field of life cycle assessment (LCA Cycle Analysis (LCA) of the H.R. MacMillan building is done in order to assess the environmental impact of the building. The intended audience of this LCA study are for those involved in building related policy making

  2. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Kevin Preston

    E-Print Network [OSTI]

    UBC Social Ecological Economic Development Studies (SEEDS) Student Report Kevin Preston LCA of New ­ the UBC LCA Project ­ which aims to support the development of the field of life cycle assessment (LCA at rob.sianchuk@gmail.com #12;University of British Columbia LCA of New UBC Pharmacy Building Life Cycle

  3. Lemon Project Spring Symposium

    E-Print Network [OSTI]

    Fashing, Norman

    Lemon Project: A Journey of Reconciliation." The BOV defined Lemon "as a long- term research project

  4. Hydropower Projects

    SciTech Connect (OSTI)

    2015-04-02

    The Water Power Program helps industry harness this renewable, emissions-free resource to generate environmentally sustainable and cost-effective electricity. Through support for public, private, and nonprofit efforts, the Water Power Program promotes the development, demonstration, and deployment of advanced hydropower devices and pumped storage hydropower applications. These technologies help capture energy stored by diversionary structures, increase the efficiency of hydroelectric generation, and use excess grid energy to replenish storage reserves for use during periods of peak electricity demand. In addition, the Water Power Program works to assess the potential extractable energy from domestic water resources to assist industry and government in planning for our nation’s energy future. From FY 2008 to FY 2014, DOE’s Water Power Program announced awards totaling approximately $62.5 million to 33 projects focused on hydropower. Table 1 provides a brief description of these projects.

  5. PROJECT SUMMARY

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy Bills andOrder 422.1, CONDUCT P - . . -Pathways)PROJECT SUMMARY 1 TITLE

  6. Hallmark Project

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:FinancingPetroleum12,ExecutiveFinancing Programs |ReferencePowerHaier: OrderProject

  7. This paper introduces a volumetric harmonic map method. First we map the volumetric boundary conformally onto a sphere. Then with this boundary condition, we compute its harmonic map in the object interior with a heat flow method. Our work is general enou

    E-Print Network [OSTI]

    This paper introduces a volumetric harmonic map method. First we map the volumetric boundary in Medical Imaging, pages 172-184, Ambleside, UK, July 2003 Volumetric Harmonic Brain Mapping Using a Variational Method Volumetric Harmonic Brain Mapping Using aVolumetric Harmonic Brain Mapping Using aVolumetric

  8. Density- and wavefunction-normalized Cartesian spherical harmonics for l ? 20

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

    Michael, J. Robert; Volkov, Anatoliy

    2015-03-01

    The widely used pseudoatom formalism in experimental X-ray charge-density studies makes use of real spherical harmonics when describing the angular component of aspherical deformations of the atomic electron density in molecules and crystals. The analytical form of the density-normalized Cartesian spherical harmonic functions for up to l ? 7 and the corresponding normalization coefficients were reported previously by Paturle & Coppens. It was shown that the analytical form for normalization coefficients is available primarily forl ? 4. Only in very special cases it is possible to derive an analytical representation of the normalization coefficients for 4 l ? 7.more »In most cases for l > 4 the density normalization coefficients were calculated numerically to within seven significant figures. In this study we review the literature on the density-normalized spherical harmonics, clarify the existing notations, use the Paturle–Coppens method in the Wolfram Mathematicasoftware to derive the Cartesian spherical harmonics for l ? 20 and determine the density normalization coefficients to 35 significant figures, and computer-generate a Fortran90 code. The article primarily targets researchers who work in the field of experimental X-ray electron density, but may be of some use to all who are interested in Cartesian spherical harmonics.« less

  9. Harmonic superspace geometry of (4,4) supersymmetric {sigma} models with torsion

    SciTech Connect (OSTI)

    Ivanov, E.A.

    1996-02-01

    Starting from the dual action of (4,4) two-dimensional (2D) twisted multiplets in the harmonic superspace with two independent sets of SU(2) harmonic variables, we present its generalization which hopefully provides an off-shell description of general (4,4) supersymmetric {sigma} models with torsion. Like the action of the torsionless (4,4) hyper-K{umlt a}hler {sigma} models in the standard harmonic superspace, it is characterized by a number of superfield potentials. They depend on {ital n} copies of a triple of analytic harmonic (4,4) superfields. As distinct from the hyper-K{umlt a}hler case, the potentials prove to be severely constrained by the self-consistency condition which stems from the commutativity of the left and right harmonic derivatives. We show that for {ital n}=1 these constraints reduce the general action to that of the (4,4) twisted multiplet, while for {ital n}{ge}2 there exists a wide class of new actions which cannot be written only via twisted multiplets. Their most strikng feature is the non-Abelian and in general nonlinear gauge invariance which substitutes the Abelian gauge symmetry of the dual action of twisted multiplets and ensures the correct number of physical degrees of freedom. We show, on a simple example, that these actions describe {sigma} models with noncommuting left and right complex structures on the bosonic target. {copyright} {ital 1996 The American Physical Society.}

  10. Custom Projects

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit theCovalent Bonding in ActinideRailCurrent ResearchInnovationCustom-Projects

  11. Project Title

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy Bills andOrderNATIONALofDefineEnergy NationalDepartmentProjectNE I&C

  12. Project Gnome

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgramExemptions |(Conference) | SciTechProject Gnome Double Beta Decay

  13. Project Title

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgramExemptions |(Conference) | SciTechProjectITERFebruaryStorage

  14. About Projects

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory of raregovAboutRecovery Act Recovery ActARM OverviewAbout GEDOE Projects

  15. Line Projects

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResourcelogo and-E C H2015Tray and|Projects Pages default

  16. Harmonic mixing in two coupled qubits: quantum synchronization via ac drives

    E-Print Network [OSTI]

    S. E. Savel'ev; Z. Washington; A. M. Zagoskin; M. J. Everitt

    2012-10-12

    Simulating a system of two driven coupled qubits, we show that the time-averaged probability to find one driven qubit in its ground or excited state can be controlled by an ac drive in the second qubit. Moreover, off-diagonal elements of the density matrix responsible for quantum coherence can also be controlled via driving the second qubit, i.e., quantum coherence can be enhanced by appropriate choice of the bi-harmonic signal. Such a dynamic synchronization of two differently driven qubits has an analogy with harmonic mixing of Brownian particles forced by two signals through a substrate. Nevertheless, the quantum synchronization in two qubits occurs due to multiplicative coupling of signals in the qubits rather than via a nonlinear harmonic mixing for a classical nano-particle.

  17. Equilibration and thermalization of the dissipative quantum harmonic oscillator in a non-thermal environment

    E-Print Network [OSTI]

    D. Pagel; A. Alvermann; H. Fehske

    2013-01-24

    We study the dissipative quantum harmonic oscillator with general non-thermal preparations of the harmonic oscillator bath. The focus is on equilibration of the oscillator in the long-time limit and the additional requirements for thermalization. Our study is based on the exact solution of the microscopic model obtained by means of operator equations of motion, which provides us with the time evolution of the central oscillator density matrix in terms of the propagating function. We find a hierarchy of conditions for thermalization, together with the relation of the asymptotic temperature to the energy distribution in the initial bath state. We discuss the presence and absence of equilibration for the example of an inhomogeneous chain of harmonic oscillators, and illustrate the general findings about thermalization for the non-thermal environment that results from a quench.

  18. Opportunities for chiral discrimination using high harmonic generation in tailored laser fields

    E-Print Network [OSTI]

    Smirnova, Olga; Patchkovskii, Serguei

    2015-01-01

    Chiral discrimination with high harmonic generation (cHHG method) has been introduced in the recent work by R. Cireasa et al ( Nat. Phys. 11, 654 - 658, 2015). In its original implementation, the cHHG method works by detecting high harmonic emission from randomly oriented ensemble of chiral molecules driven by elliptically polarized field, as a function of ellipticity. Here we discuss future perspectives in the development of this novel method, the ways of increasing chiral dichroism using tailored laser pulses, new detection schemes involving high harmonic phase measurements, and concentration-independent approaches. Using the example of the epoxypropane molecule C$_3$H$_6$O (also known as 1,2-propylene oxide), we show theoretically that application of two-color counter-rotating elliptically polarized laser fields yields an order of magnitude enhancement of chiral dichroism compared to single color elliptical fields. We also describe how one can introduce a new functionality to cHHG: concentration-independen...

  19. Improved quantum correlations in second harmonic generation with a squeezed pump

    E-Print Network [OSTI]

    E. MArcellina; J. F. Corney; M. K. Olsen

    2013-02-11

    We investigate the effects of a squeezed pump on the quantum properties and conversion efficiency of the light produced in single-pass second harmonic generation. Using stochastic integration of the two-mode equations of motion in the positive-P representation, we find that larger violations of continuous-variable harmonic entanglement criteria are available for lesser effective interaction strengths than with a coherent pump. This enhancement of the quantum properties also applies to violations of the Reid-Drummond inequalities used to demonstrate a harmonic version of the Einstein-Podolsky-Rosen paradox. We find that the conversion efficiency is largely unchanged except for very low pump intensities and high levels of squeezing.

  20. Regularity properties of stationary harmonic functions whose Laplacian is a Radon measure

    E-Print Network [OSTI]

    Rémy Rodiac

    2015-04-28

    We study the regularity of Radon measures $\\mu$ which satisfy that there exists a function $h_\\mu$ in $H^1(\\Omega)$, stationary harmonic such that $\\Delta h_\\mu =\\mu$ in $\\Omega$ (here $\\Omega$ is an open set of $\\mathbb{R}^2$). Such conditions appear in physical contexts such as the study of a limiting vorticity measure associated to a family $(u_\\varepsilon)_\\varepsilon$ of solutions of the Ginzburg-Landau system without magnetic field. Under these conditions we prove that locally there exists a harmonic function $H$ such that the support of the measure is contained in the set of zeros of $H$. Using the local structure of the set of zeros of harmonic functions we can thus obtain that locally the support of $\\mu$ is a union of smooth simple

  1. Mode conversion and absorption of fast waves at high ion cyclotron harmonics in inhomogeneous magnetic fields

    SciTech Connect (OSTI)

    Cho, Suwon; Kwak, Jong-Gu

    2014-04-15

    The propagation and absorption of high harmonic fast waves is of interest for non-inductive current drives in fusion experiments. The fast wave can be coupled with the ion Bernstein wave that propagates in the high magnetic field side of an ion cyclotron harmonic resonance layer. This coupling and the absorption are analyzed using the hot plasma dispersion relation and a wave equation that was converted from an approximate dispersion relation for the case where ?{sub i}=k{sub ?}{sup 2}?{sub i}{sup 2}/2?1 (where k{sub ?} is the perpendicular wave number and ?{sub i} is the ion Larmor radius). It is found that both reflection and conversion may occur near the harmonic resonance layer but that they decrease rapidly, giving rise to a sharp increase in the absorption as the parallel wave number increases.

  2. Wave function for harmonically confined electrons in time-dependent electric and magnetostatic fields

    SciTech Connect (OSTI)

    Zhu, Hong-Ming; Chen, Jin-Wang; Pan, Xiao-Yin; Sahni, Viraht

    2014-01-14

    We derive via the interaction “representation” the many-body wave function for harmonically confined electrons in the presence of a magnetostatic field and perturbed by a spatially homogeneous time-dependent electric field—the Generalized Kohn Theorem (GKT) wave function. In the absence of the harmonic confinement – the uniform electron gas – the GKT wave function reduces to the Kohn Theorem wave function. Without the magnetostatic field, the GKT wave function is the Harmonic Potential Theorem wave function. We further prove the validity of the connection between the GKT wave function derived and the system in an accelerated frame of reference. Finally, we provide examples of the application of the GKT wave function.

  3. PROJECT MANGEMENT PLAN EXAMPLES Project Organization Examples

    Energy Savers [EERE]

    is responsible for supporting the FDH and RL project offices with adequate day-to-day planning and review technical management, coordination, control, and reporting of project...

  4. Harmonization of Land-Use Scenarios for the Period 1500-2100: 600 Years of Global Gridded Annual Land-Use Transitions, Wood Harvest, and Resulting Secondary Lands

    SciTech Connect (OSTI)

    Hurtt, George; Chini, Louise Parsons; Frolking, Steve; Betts, Richard; Feddema, Johannes; Fischer, Gavin M.; Fisk, J.P.; Hibbard, Kathleen A.; Houghton, R. A.; Janetos, Anthony C.; Jones, C.; Kindermann, G.; Kinoshita, Tsuguki; Goldeweijk, Kees K.; Riahi, Keywan; Shevliakova, Elena; Smith, Steven J.; Stehfest, Eike; Thomson, Allison M.; Thornton, P.; Van Vuuren, Detlef; Wang, Y.

    2011-08-08

    In preparation for the fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC), the international community is developing new advanced Earth System Models (ESM) to assess the combined effects of human activities (e.g. land use and fossil fuel emissions) on the carbon-climate system. In addition, four Representative Concentration Pathway (RCP) scenarios of the future (2005-2100) are being provided by four Integrated Assessment Model (IAM) teams to be used as input to the ESMs for future carbon-climate projections (Moss et al., 2010). The diversity of approaches and requirements among IAMs and ESMs for tracking land-use change, along with the dependence of model projections on land-use history, presents a challenge for effectively passing data between these communities and for smoothly transitioning from the historical estimates to future projections. Here, a harmonized set of land-use scenarios are presented that smoothly connects historical reconstructions of land use with future projections, in the format required by ESMs.

  5. Quantum spatial-periodic harmonic model for daily price-limited stock markets

    E-Print Network [OSTI]

    Meng, Xiangyi; Xu, Jingjing; Guo, Hong

    2015-01-01

    We investigate the behavior of stocks in daily price-limited stock markets by purposing a quantum spatial-periodic harmonic model. The stock price is presumed to oscillate and damp in a quantum spatial-periodic harmonic oscillator potential well. Complicated non-linear relations including inter-band positive correlation and intra-band negative correlation between the volatility and the trading volume of stocks are derived by considering the energy band structure of the model. The validity of price limitation is then examined and abnormal phenomena of a price-limited stock market (Shanghai Stock Exchange) of China are studied by applying our quantum model.

  6. Advanced properties of extended plasmas for efficient high-order harmonic generation

    SciTech Connect (OSTI)

    Ganeev, R. A.; Physics Department, Voronezh State University, Voronezh 394006 ; Suzuki, M.; Kuroda, H.

    2014-05-15

    We demonstrate the advanced properties of extended plasma plumes (5?mm) for efficient harmonic generation of laser radiation compared with the short lengths of plasmas (?0.3–0.5?mm) used in previous studies. The harmonic conversion efficiency quadratically increased with the growth of plasma length. The studies of this process along the whole extreme ultraviolet range using the long plasma jets produced on various metal surfaces, particularly including the resonance-enhanced laser frequency conversion and two-color pump, are presented. Such plasmas could be used for the quasi-phase matching experiments by proper modulation of the spatial characteristics of extended ablating area and formation of separated plasma jets.

  7. Renormalizable N=2 supersymmetric and gauge invariant interactions from the N=2 harmonic superspace with central charges

    SciTech Connect (OSTI)

    Saidi, E.H. (Laboratoire de Physique Theorique, Faculte de Sciences, Battouta, Rabat (MA))

    1987-01-01

    The N=2 harmonic superspace in the presence of central charges is developed. Renormalizable interactions unusual in N=2 supersymmetric theories are derived in a consistent way. Symmetries generated by the central charges are discussed. A certain equivalence between N=2 harmonic superspace with and without central charges is established. An Abelian generalization of the model is given.

  8. SPEECH ENHANCEMENT IN CAR NOISE ENVIRONMENT BASED ON AN ANALYSIS-SYNTHESIS APPROACH USING HARMONIC NOISE MODEL

    E-Print Network [OSTI]

    So, Hing-Cheung

    SPEECH ENHANCEMENT IN CAR NOISE ENVIRONMENT BASED ON AN ANALYSIS- SYNTHESIS APPROACH USING HARMONIC using harmonic noise model (HNM) in car noise environment. The major advantages of this method are effective suppression of car noise even in very low signal-to-noise ratio environments and mitigation

  9. Generation of circularly polarized multiple high-order harmonic emission from two-color crossed laser beams

    E-Print Network [OSTI]

    Chu, Shih-I

    Generation of circularly polarized multiple high-order harmonic emission from two-color crossed for the production of circularly polarized multiple high-order harmonic generation HHG . The proposed experimental as the mechanism for the generation of continuous background radiation. S1050-2947 98 50410-6 PACS number s : 42

  10. Ionization and high-order harmonic generation in aligned benzene by a short intense circularly polarized laser pulse

    E-Print Network [OSTI]

    Moiseyev, Nimrod

    Ionization and high-order harmonic generation in aligned benzene by a short intense circularly and high-order harmonic generation by benzene aligned in the polarization plane of a short circularly pulses 4 . Recently, other types of HHG processes have been dis- covered in molecules. The planar benzene

  11. Performance study of a soft X-ray harmonic generation FEL seeded with an EUV laser pulse

    E-Print Network [OSTI]

    Wurtele, Jonathan

    Performance study of a soft X-ray harmonic generation FEL seeded with an EUV laser pulse M. Gullans electron laser (FEL) using a low-power extreme ultraviolet (EUV) pulse as an input seed is investigated. The parameters are appropriate for 30 nm seeds produced from high-power Ti:Sapphire pulses using high harmonic

  12. Quasiresonant excitation of InP/InGaP quantum dots using second harmonic generated in a photonic crystal cavity

    E-Print Network [OSTI]

    Vuckovic, Jelena

    Quasiresonant excitation of InP/InGaP quantum dots using second harmonic generated in a photonic://apl.aip.org/about/rights_and_permissions #12;Quasiresonant excitation of InP/InGaP quantum dots using second harmonic generated in a photonic applications. Resonant or quasiresonant excitation of single quantum dots provides greater single photon

  13. 478 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 19, NO. 2, MARCH 2004 A Unified Approach to Solving the Harmonic

    E-Print Network [OSTI]

    Tolbert, Leon M.

    or in parallel an ac grid with distributed energy resources such as photovoltaics (solar cells), fuel cells to Solving the Harmonic Elimination Equations in Multilevel Converters John N. Chiasson, Senior Member, IEEE exist. A unified ap- proach is presented to solve the harmonic elimination equations for all

  14. Output Harmonic Termination Techniques for AlGaN/GaN HEMT Power Amplifiers Using Active Integrated Antenna Approach

    E-Print Network [OSTI]

    Itoh, Tatsuo

    Output Harmonic Termination Techniques for AlGaN/GaN HEMT Power Amplifiers Using Active Integrated 1200, Los Angeles, CA 90045 Abstract -- In this paper, effects of output harmonic terminations on PAE termination, we observe a substantial increase in PAE and output power. Further, we demonstrate the high

  15. Classical versus quantum harmonic-generation spectrum of a driven anharmonic oscillator in the high-frequency regime

    E-Print Network [OSTI]

    Moiseyev, Nimrod

    Classical versus quantum harmonic-generation spectrum of a driven anharmonic oscillator in the high-frequency September 1997 The harmonic-generation spectrum of an anharmonic oscillator perturbed by a high-frequency the transition frequency be- tween the adjacent atomic states. The quantum mechanical QM theory of HG in the low-frequency­high

  16. Optimization of high-order harmonic generation by genetic algorithm and wavelet time-frequency analysis of quantum dipole emission

    E-Print Network [OSTI]

    Chu, Shih-I

    -dimensional quantum study of the coherent control of high-order harmonic generation HHG processes in intense pulsed.65.Ky, 32.80.Wr The study of coherent control of atomic and molecular processes is a subject of muchOptimization of high-order harmonic generation by genetic algorithm and wavelet time

  17. PROJECT MANAGEMENT Professional Organizations

    E-Print Network [OSTI]

    Acton, Scott

    PROJECT MANAGEMENT Professional Organizations: Association of Collegiate Computing Services) Project Management Institute (PMI) Events & Training: UVA Local Support Partners (LSP) program training Project Management Institute webinars Project Management Institute events Scrum Alliance events Learning

  18. Project Management Lessons Learned

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2008-08-05

    The guide supports DOE O 413.3A, Program and Project Management for the Acquisition of Capital Assets, and aids the federal project directors and integrated project teams in the execution of projects.

  19. PROJECT MANAGEMENT Professional Organizations

    E-Print Network [OSTI]

    Acton, Scott

    PROJECT MANAGEMENT Professional Organizations: Project Management Institute International Association of Project and Program Management (IAPPM) Events & Training: UVa Center for Leadership Excellence classes SkillSoft classes PMO Symposium through PMI Project Management Institute (PMI) webinars American

  20. pre-acts -6th annual international conference of Territorial Intelligence -caENTI October 2008 1 SUSTAINABLE DEVELOPMENT ASSESSMENT TOOLS DEDICATED TO TERRITORIAL

    E-Print Network [OSTI]

    Boyer, Edmond

    and Innovation Division is involved in various LCA projects such as the assessment of renewable energies (biogas

  1. Perspectives on Project Finance

    Broader source: Energy.gov [DOE]

    Plenary III: Project Finance and Investment Perspectives on Project Finance John May, Managing Partner, Stern Brothers & Co.

  2. Community Renewables Projects

    Broader source: Energy.gov [DOE]

    This webinar covered introduction and barriers to individual renewable projects, resources for community and group buy projects, and permitting guidelines.

  3. Producer-Focused Life Cycle Assessment of Thin-Film Silicon Photovoltaic Systems

    E-Print Network [OSTI]

    Zhang, Teresa Weirui

    2011-01-01

    PV LCA Guidelines . . . . . . . . . . . . . . . . . . .LCAEIO-LCA . . . . . . . . . . . . . . . . . . . . . . . .

  4. Computer Vision Project Topics Project Reports

    E-Print Network [OSTI]

    Zhu, Zhigang

    (contour projection?). step5: choose a tolerance value(3 or 5 pixels) to evaluate the image with eachComputer Vision Project Topics CSc I6716 Spring2011 #12;Project Reports 1. Introduction (problem up with Nikolaos Markou? · Key Components ­ The project is to find a target image from bunch

  5. Project Final Report UBC LBS Project Services1 Project Final Report UBC LBS Project Services2

    E-Print Network [OSTI]

    is used as a foundation for all development, land use, and transportation activities at UBC. LBS Project Services is a fee-for-service provider of development, design, and project management servicesProject Final Report UBC LBS Project Services1 #12;Project Final Report UBC LBS Project Services2

  6. Numerical analysis of BoseEinstein condensation in a three-dimensional harmonic oscillator potential

    E-Print Network [OSTI]

    Ligare, Martin

    Numerical analysis of Bose­Einstein condensation in a three-dimensional harmonic oscillator 24 March 1997; accepted 12 May 1997 Bose­Einstein condensation is the anomalous accumulation the conditions of the recent experiments achieving Bose­Einstein condensation in laser-cooled alkali vapors

  7. Perturbation theory and harmonic gauge propagation in general relativity, a particular example

    E-Print Network [OSTI]

    J. Martín; A. Molina; E. Ruiz

    2015-02-20

    We study how the changes of coordinates between the class of harmonic coordinates affect the analitycal solutions of Einstein's equations and we apply it to an analytical approach for stationary and axisymmetric solutions of Einstein equation used by the authors \\cite{cmmr}, \\cite{cugmmr} to solve the problem of a self-gravitating rigidly rotating perfect fluid compact source.

  8. Constructing Quantum Logic Gates Using q-Deformed Harmonic Oscillator Algebras

    E-Print Network [OSTI]

    Azmi Ali Altintas; Fatih Ozaydin; Can Yesilyurt; Sinan Bugu; Metin Arik

    2015-04-23

    We study two-level q-deformed angular momentum states and us- ing q-deformed harmonic oscillators, we provide a framework for con- structing qubits and quantum gates. We also present the construction of some basic quantum gates including CNOT, SWAP, Toffoli and Fredkin.

  9. DAVID BEN-ZVI Goal: develop basic tools of representation theory. and harmonic

    E-Print Network [OSTI]

    Proudfoot, Nicholas

    OVERVIEW DAVID BEN-ZVI Goal: develop basic tools of representation theory. and harmonic analysis analysis for categories. Need basic alge- bra for categories. These will be given by the theory A, there is a G-action on A -mod. · Physics. G-gauge theories, QFTs with G

  10. Effects of harmonic phase on nonlinear surface acoustic waves in the (111) plane of cubic crystals

    E-Print Network [OSTI]

    Effects of harmonic phase on nonlinear surface acoustic waves in the (111) plane of cubic crystals of surface acoustic waves SAWs in the 001 surface cut of nonpiezo- electric, cubic crystals. The present 2002 Spectral evolution equations are used to perform numerical studies of nonlinear surface acoustic

  11. Stabilizing effect of a double-harmonic RF system in the CERN PS

    SciTech Connect (OSTI)

    Bhat, C.; Caspers, F.; Damerau, H.; Hancock, S.; Mahner, E.; Zimmermann, F.; /CERN

    2009-04-01

    Motivated by the discussions on scenarios for LHC upgrades, beam studies on the stability of flat bunches in a double-harmonic RF system have been conducted in the CERN Proton Synchrotron (PS). Injecting nearly nominal LHC beam intensity per cycle, 18 bunches are accelerated on harmonic h = 21 to 26GeV with the 10MHz RF system. On the flat-top, all bunches are then transformed to flat bunches by adiabatically adding RF voltage at h = 42 from a 20 MHz cavity in anti-phase to the h = 21 system. The voltage ratio V (h42)/V (h21) of about 0.5 was set according to simulations. For the next 140 ms, longitudinal profiles show stable bunches in the double-harmonic RF bucket until extraction. Without the second harmonic component, coupled-bunch oscillations are observed. The flatness of the bunches along the batch is analyzed as a measure of the relative phase error between the RF systems due to beam loading. The results of beam dynamics simulations and their comparison with the measured data are presented.

  12. Extended BRS and anti-BRS symmetries in N=2 harmonic superspace

    SciTech Connect (OSTI)

    Lhallabi, T.; Saidi, E.H. (L.P.T., av. Ibn Battouta, Rabat (MA))

    1988-01-01

    The full set of extended BRS and anti-BRS symmetries are derived for components of superconnection and gauge superfield using the N = 2 harmonic superspace. The quantization of N = 2 supersymmetric theory is developed and the proof of its gauge invariance is presented.

  13. Ground vibration due to a high-speed moving harmonic rectangular load on a

    E-Print Network [OSTI]

    Avignon et des Pays de Vaucluse, Université de

    Ground vibration due to a high-speed moving harmonic rectangular load on a poroviscoelastic half'Avignon, Facult´e des Sciences, 33 rue Louis Pasteur, F-84000 Avignon, France RUNNING TITLE: Vibrations induced) #12;Abstract The transmission of vibrations in the ground, due to a high-speed moving vertical har

  14. Enhancement of high-harmonic generation by laser-induced cluster vibration

    E-Print Network [OSTI]

    Enhancement of high-harmonic generation by laser-induced cluster vibration Yen-Mu Chen,1,2 Ming a new tool for studying the vibrational dynamics of nanometer atomic clusters. © 2007 Optical Society vibration was reported [8], and the results indicate that HHG is a very sensitive probe for vibrational

  15. Attosecond Probing of Vibrational Dynamics with High-Harmonic Generation Manfred Lein*

    E-Print Network [OSTI]

    Lein, Manfred

    ; published 11 February 2005) The numerical solution of the time-dependent Schro¨dinger equation for vibrating hydrogen molecules in few-cycle laser pulses shows that high-harmonic generation is sensitive to the laser.80.Rv The laser-based measurement of ultrafast processes in atoms and molecules has recently advanced

  16. Harmonic Elimination in Multilevel Converters John Chiasson, Leon Tolbert, Keith McKenzie and Zhong Du

    E-Print Network [OSTI]

    Tolbert, Leon M.

    Converters, Harmonic Elimination, Resultants, Symmetric Polynomials I. Introduction Electric power production and information infrastructure. A shift will take place from a relatively few large, concentrated generation be obtained from solar cells, fuel cells, or ul- tracapacitors. Figure 1 shows a single-phase structure

  17. On time-reversal and space-time harmonic processes for Markovian quantum channels

    E-Print Network [OSTI]

    Francesco Ticozzi; Michele Pavon

    2009-04-29

    The time reversal of a completely-positive, nonequilibrium discrete-time quantum Markov evolution is derived via a suitable adjointness relation. Space-time harmonic processes are introduced for the forward and reverse-time transition mechanisms, and their role for relative entropy dynamics is discussed.

  18. Improving Dynamic Response of Active Harmonic Compensator using Digital Comb Filter

    E-Print Network [OSTI]

    Mazumder, Sudip K.

    power filter. I. INTRODUCTION The need for power quality improvement is not new. Many power electronics systems, including switching power elec- tronics, passive diode rectifiers, thyristor controlled loads, to name a few, lead to harmonic generation and degrade the power quality significantly. Among those

  19. High-resolution frequency-domain second-harmonic optical coherence tomography

    E-Print Network [OSTI]

    Chen, Zhongping

    capability for high-resolution optical 3D sec- tioning of samples because signals only arise from the focal structure of the specimen and its orientation relative to the laser beam. In biological materials, collagenHigh-resolution frequency-domain second-harmonic optical coherence tomography Jianping Su, Ivan V

  20. Dramatic Enhancement of Third-Harmonic Generation in Three-Dimensional Photonic Crystals

    E-Print Network [OSTI]

    Boyd, Robert W.

    of optical elements on the chip [6]. In addition, complex defect waveguide structures can be achieved in 3D February 2004) We have observed a dramatic enhancement of third-harmonic generation in 3D polystyrene crystals possess optical properties not present in any naturally occurring material; these properties can

  1. Simulation Study of Amplitude-Modulated (AM) Harmonic Motion Imaging (HMI) for Stiffness Contrast Quantification with

    E-Print Network [OSTI]

    Konofagou, Elisa E.

    on the tumor's distinct stiffness at the early onset of disease. HMI is a radiation-force-based imaging method a local- ized vibration inside the target. Radiofrequency (rf) signals were then simulated using a 2D- mental rf signals to estimate the axial displacement resulting from the harmonic radiation force. In or

  2. Regulation and Compensation of Source Harmonics for the Boost ConverterBased Power Factor

    E-Print Network [OSTI]

    Perreault, Dave

    Regulation and Compensation of Source Harmonics for the Boost Converter­Based Power Factor of a diode bridge and associated boost converter. This circuit is the most widely employed of the fam- ily for the boost­ based power factor precompensator which guarantees fast regulation of the output voltage towards

  3. Seeding of a soft-x-ray laser in a plasma waveguide by high harmonic generation

    E-Print Network [OSTI]

    Seeding of a soft-x-ray laser in a plasma waveguide by high harmonic generation Ping-Hsun Lin,1 University, Chia-Yi 621, Taiwan *Corresponding author: sychen@ltl.iams.sinica.edu.tw Received August 10, 2009 November 12, 2009 A strongly saturated waveguide-based optical-field-ionization soft-x-ray laser seeded

  4. Simulation of a parametric quartz crystal oscillator by the symbolic harmonic method

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    method amounts to compute the behavior of the linear part of the circuit in the frequency domain differential equations describing the oscillator circuit is replaced by a system of non- linear equations de l'Observatoire, F-25044 Besan¸con, France The Symbolic Harmonic Analysis (SHA) method

  5. PSFC/JA-04-34 Second Harmonic Operation at 460 GHz and

    E-Print Network [OSTI]

    Griffin, Robert G.

    with previous technology. Index Terms-- Gyrotron, submillimeter, harmonic, frequency tuning, dynamic nuclear Institute of Technology Cambridge, MA 02139 USA 1 Francis Bitter Magnet Laboratory Massachusetts Institute of Technology Cambridge, MA 02139 USA 2 Northrop Grumman Corporation Rolling Meadows, IL 60008 USA Submitted

  6. Sensitivity of Harmonic Injection and its Spatial Evolution for Nonlinear Distortion Suppression in a TWT

    E-Print Network [OSTI]

    Singh, Aarti

    Sensitivity of Harmonic Injection and its Spatial Evolution for Nonlinear Distortion Suppression presents an experimental investigation of the spatial evolution and sensitivity of third-order nonlinear injection without injection (d) Output Fig. 1 Spatial evolution of the wave spectrum along the TWT axis

  7. Nonlinear Chemical Imaging Microscopy: Near-Field Third Harmonic Generation Imaging of

    E-Print Network [OSTI]

    Cohen, Ronald C.

    radiation in human red blood cells. We show that resonantly enhanced THG is a chemically specific bulk probeNonlinear Chemical Imaging Microscopy: Near-Field Third Harmonic Generation Imaging of Human Red experiments do not produce contrast that is truly surface specific. There is much current interest in the use

  8. Second harmonic generation and pulse shaping in positively and negatively spatially dispersive nanowaveguides: comparative analysis

    E-Print Network [OSTI]

    Popov, Alexander K

    2015-01-01

    Comparative analysis of second harmonic generation in ordinary and backward-wave settings is presented. Extraordinary properties of frequency doubling nonlinear optical reflectivity and pulse shaping through phase matching of ordinary and backward electromagnetic waves in the nanowaveguides with mixed negative/positive spatial dispersion is demonstrated with numerical simulations.

  9. Parametric spatial solitary waves due to type II second-harmonic generation

    E-Print Network [OSTI]

    Parametric spatial solitary waves due to type II second-harmonic generation Alexander V. Buryak either 1 or 2 is generated). A particular case of this three-wave interaction, formally described analyze (1 1)- and (2 1)-dimensional self-guided beams (spatial solitons) due to three-wave para- metric

  10. Frequency Synthesizers and Oscillator Architectures Based on Multi-Order Harmonic Generation 

    E-Print Network [OSTI]

    Abdul-Latif, Mohammed

    2012-02-14

    synthesizers. This architecture uses two-step multi-order harmonic generation of a low frequency phase-locked signal to generate wideband mm-wave frequencies. A prototype of the proposed system is designed and fabricated in 90nm Complementary Metal Oxide...

  11. Nonergodic behavior of interacting bosons in harmonic traps Thomas Papenbrock and George F. Bertsch

    E-Print Network [OSTI]

    Bertsch George F.

    Nonergodic behavior of interacting bosons in harmonic traps Thomas Papenbrock and George F. Bertsch of the ground-state occupation number. In the high-energy regime of classical physics we find nonergodic behavior for modest numbers of trapped particles. We give two conditions that assure the ergodic behavior

  12. Calibrating the sensing-coil radius by feed-down from a harmonic reference

    E-Print Network [OSTI]

    Arpaia, Pasquale; Koster, Oliver; Russenschuck, Stephan; Severino, Giordana

    2015-01-01

    A method for calibrating the radius of rotating, harmonic sensing coils is proposed that allows relaxing constraints on alignment and field errors of the reference quadrupole magnet. Radius calibration considering roll angle misalignment between the measurement bench, the magnet, and the motor-drive unit is studied first. We then study the calibration error when

  13. A New Approach to Solving the Harmonic Elimination Equations for a Multilevel Converter

    E-Print Network [OSTI]

    Tolbert, Leon M.

    is required. A multilevel inverter is ideal for connecting such distributed dc energy sources (solar cellsA New Approach to Solving the Harmonic Elimination Equations for a Multilevel Converter John N that the transcendental equations characterizing the har- monic content can be converted to polynomial equations which

  14. Generation of High Harmonics in Argon, Hydrogen and Their Mixture with Neon 

    E-Print Network [OSTI]

    Sayrac, Muhammed

    2013-06-03

    electron motion, one needs to reach sub-femtosecond time scale that is in attosecond time scale. High Harmonic Generation (HHG) is a non-linear process that converts infrared light to shortest wavelength, such as in the XUV regime. HHG allows to explore...

  15. Synchronization transitions in ensembles of noisy oscillators with bi-harmonic coupling

    E-Print Network [OSTI]

    Pikovsky, Arkady

    with a bi-harmonic coupling function, and two sources of disorder--diversity of the intrinsic oscillators junctions, where the dynamics of a single junction in the array is governed by a double-well energy of disorder that hinder synchroni- zation, namely diversity of oscillators' frequencies, and white additive

  16. Fast ion absorption of the high harmonic fast wave in the National Spherical Torus Experiment a...

    E-Print Network [OSTI]

    Egedal, Jan

    above the beam injection energy is sustained by the wave. In agreement with modeling, these experimentsFast ion absorption of the high harmonic fast wave in the National Spherical Torus Experiment a Institute of Technology, Cambridge, Massachusetts 02139 #Received 23 October 2003; accepted 19 December 2003

  17. Fast ion absorption of the high harmonic fast wave in the National Spherical Torus Experimenta...

    E-Print Network [OSTI]

    injection energy is sustained by the wave. In agreement with modeling, these experiments find the rfFast ion absorption of the high harmonic fast wave in the National Spherical Torus Experimenta... A Institute of Technology, Cambridge, Massachusetts 02139 Received 23 October 2003; accepted 19 December 2003

  18. More on Random Walks, Electrical Networks and the Harmonic k-Server Algorithm

    E-Print Network [OSTI]

    Bartal, Yair

    , Northridge, CA 91330. Research supported by NSF grant CCR-9988360. x Verity, Inc. 894 Ross Drive, Sunnyvale is that the cycle stretch factor of the harmonic random walk is at most 1 2 n(n 1), where the cycle stretch factor is de#12;ned as the maximum ratio between the cost of a random walk that visits nodes of a cycle (in

  19. Continuous wave second-harmonic generation using domain-disordered quasi-phase matching waveguides

    E-Print Network [OSTI]

    , 10 King's College Road, Ontario M5S 3G4, Canada 2 Department of Electronics and Electrical. Hutchings2 1 Edward S. Rogers Sr. Department of Electrical and Computer Engineering, University of Toronto fundamental source. Output second-harmonic powers of up to 1.6 W were measured when on a Fabry-Pérot resonance

  20. Simulating heat transport of harmonic temperature signals in the Earth's shallow subsurface: Lower-boundary sensitivities

    E-Print Network [OSTI]

    Smerdon, Jason E.

    Simulating heat transport of harmonic temperature signals in the Earth's shallow subsurface: Lower changes, freeze-thaw cycles, and hydrologic dynamics. It is uncertain, however, whether the reported atmospheric simulations. Citation: Smerdon, J. E., and M. Stieglitz (2006), Simulating heat transport

  1. Identification and Control of Nonlinear Harmonic Coupling for Pulsed Jet Injection

    E-Print Network [OSTI]

    M'Closkey, Robert T.

    ], [2]. In turbine engines, for example, active control of the jet in crossflow has been shownIdentification and Control of Nonlinear Harmonic Coupling for Pulsed Jet Injection Cory Hendrickson tracking in a fundamental pulsed jet injection ex- perimental study. The objective is to match the jet

  2. Harmonic Path (HAPA) Algorithm for Noncontact Vital Signs Monitoring with IRUWB Radar

    E-Print Network [OSTI]

    Ingram, Mary Ann

    Harmonic Path (HAPA) Algorithm for Non­contact Vital Signs Monitoring with IR­UWB Radar Van Nguyen. INTRODUCTION Vital sign monitoring is fundamental in health care as knowledge of the patient's heart rate (HR consistently and accurately [1]. Currently the most common form of vital sign monitoring in hospitals is pulse

  3. Second Harmonic Generation in Neurons: Electro-Optic Mechanism of Membrane Potential Sensitivity

    E-Print Network [OSTI]

    Yuste, Rafael

    of Biological Sciences, and y Department of Chemistry, Columbia University, New York ABSTRACT Second harmonic an excellent SHG chromophore (8,9). We observed a linear dependency between SHG signals and membrane potential angle, the tilt angle of the dye molecule with respect to the plasma membrane can be analytically

  4. Harmonic Generation in Thin Films and Multilayers William S. Kolthammer, Dustin Barnard, Nicole Carlson, Aaron D. Edens, Nathan A. Miller, and Peter N. Saeta

    E-Print Network [OSTI]

    Saeta, Peter N.

    Harmonic Generation in Thin Films and Multilayers William S. Kolthammer, Dustin Barnard, Nicole, Claremont, CA 91711 (Dated: September 6, 2004) A general method for computing harmonic generation in studying the second- and third-harmonic generation properties of thin crystal silicon layers surrounded

  5. PHYSICAL REVIEW A 91, 063408 (2015) Optimal control of high-order harmonics for the generation of an isolated ultrashort attosecond

    E-Print Network [OSTI]

    Chu, Shih-I

    2015-01-01

    PHYSICAL REVIEW A 91, 063408 (2015) Optimal control of high-order harmonics for the generation an efficient high-order-harmonic optimal control scheme for the generation of the ultrabroad supercontinuum NEWUOA (NEW Unconstrained Optimization Algorithm). For illustration, the high-order-harmonic generation

  6. Harmonic QPOs and Thick Accretion Disk Oscillations in BL Lac Object AO 0235+164

    E-Print Network [OSTI]

    F. K. Liu; G. Zhao; Xue-Bing Wu

    2006-06-27

    Periodic outbursts are observed in many AGNs and usually explained with a supermassive black hole binary (SMBHB) scenario. However, multiple periods are observed in some AGNs and cannot be explained with it. Here we analyze the periodicity of the radio light curves of AO 0235+164 at multi-frequencies and report the discovery of six QPOs in integer ratio 1:2:3:4:5:6 of QPO frequencies, of which the second with period $P_2 = (5.46 \\pm 0.47) {\\rm yr}$ is the strongest. We fit the radio light curves and show that the initial phases of six QPOs have zero or $\\pi$ differences relative to each other. We suggest a harmonic relationship of QPOs. The centroid frequency, relative strength, harmonic relationship and relative initial phases of QPOs are independent of radio frequency. The harmonic QPOs are likely due to the quasi-periodic injection of plasma from an oscillating accretion disk into the jet. We estimate the supermassive black hole mass $M_{\\rm BH} \\simeq (4.72\\pm 2.04) \\times 10^8 M_\\odot$ and the accretion rate $\\dot{m}\\simeq 0.007$. With the knowledge of accretion disk, it implies that the inner region of accretion disk of AO 0235+164 is a radiatively inefficient accretion flow. The oscillation accretion is due to the p-mode oscillation of the thick disk probably excited by a SMBHB. The theoretical predications of fundamental oscillation frequency and the harmonics are well consistent with the observations. Harmonic QPOs would be absent when the thick disk becomes geometrically thin due to the increase of accretion rate. We discuss the observations of AO 0235+164 basing on the SMBHB-thick disk oscillation scenario.

  7. Projective ML Didier Remy

    E-Print Network [OSTI]

    Rémy, Didier

    Projective ML Didier Remy INRIA-Rocquencourt Apr 10, 1992 Abstract We propose a projective lambda calculus as the ba- sis for operations on records. Projections operate on elevations, that is, records projective ML from this calculus by adding the ML Let typing rule to the simply typed projective calculus. We

  8. Project Reports for Haida Corporation- 2010 Project

    Office of Energy Efficiency and Renewable Energy (EERE)

    The Reynolds Creek Hydroelectric Project ("Reynolds Creek" or the "Project") is a 5 MW hydroelectric resource to be constructed on Prince of Wales Island, Alaska, approximately 10 miles east of Hydaburg.

  9. Project Selection - Record Keeping 

    E-Print Network [OSTI]

    Howard, Jeff W.

    2005-05-10

    4-H members have many project areas to choose from, depending on where they live. Members should consult with their parents and 4-H leaders when choosing a project. This publication outlines project considerations.

  10. Clean Coal Projects (Virginia)

    Broader source: Energy.gov [DOE]

    This legislation directs the Virginia Air Pollution Control Board to facilitate the construction and implementation of clean coal projects by expediting the permitting process for such projects.

  11. 2016 Technology Innovation Projects

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

    Projects FY 2016 Technology Innovation Project Briefs Demand Response TIP 292: Advanced Heat Pump Water Heater Research TIP 336: Scaled Deployment and Demonstration of Demand...

  12. Contract/Project Management

    Office of Environmental Management (EM)

    Contract and Project Management Performance Metrics and Targets 1 ContractProject Management Primary Performance Metrics FY 2011 Target FY 2011 Actual & Forecast FY 2011...

  13. Contract/Project Management

    Office of Environmental Management (EM)

    and Project Management Improvement Performance Metrics and Targets 1 ContractProject Management Primary Performance Metrics FY 2011 Target FY 2011 Forecast FY 2011 Pre- &...

  14. Contract/Project Management

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

    Contract and Project Management Performance Metrics and Targets 1 ContractProject Management Primary Performance Metrics FY 2010 Target FY 2010 Actual FY 2010 Pre- &...

  15. Contract/Project Management

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

    Contract and Project Management Performance Metrics and Targets 1 ContractProject Management Primary Performance Metrics FY 2010 Target FY 2010 Forecast FY 2010 Pre- &...

  16. Contract/Project Management

    Energy Savers [EERE]

    and Project Management Improvement Performance Metrics and Targets 1 ContractProject Management Performance Metric FY 2012 Target FY 2012 Forecast FY 2012 Pre- & Post-CAP...

  17. Contract/Project Management

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

    and Project Management Improvement Performance Metrics and Targets 1 ContractProject Management Performance Metric FY 2012 Target FY 2012 Final FY 2012 Pre- & Post-CAP Final...

  18. Contract/Project Management

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

    2 nd Quarter Overall Contract and Project Management Performance Metrics and Targets ContractProject Management Performance Metrics FY 2009 Target FY 2009 Actual Comment 1....

  19. Contract/Project Management

    Office of Environmental Management (EM)

    1 st Quarter Overall Contract and Project Management Performance Metrics and Targets ContractProject Management Performance Metrics FY 2009 Target FY 2009 Actual Comment 1....

  20. Contract/Project Management

    Office of Environmental Management (EM)

    3 rd Quarter Overall Contract and Project Management Performance Metrics and Targets ContractProject Management Performance Metrics FY 2009 Target FY 2009 Actual Comment 1....

  1. Contract/Project Management

    Energy Savers [EERE]

    Third Quarter Overall Contract and Project Management Improvement Performance Metrics and Targets 1 ContractProject Management Performance Metric FY 2012 Target FY 2012 Forecast...

  2. Project 1640 Palomar Procedures

    E-Print Network [OSTI]

    Project 1640 Palomar Procedures Version 0.1 7/7/08 2:11:08 PM #12;2 Project 1640 Design..................................................................................................................... 1 Palomar Procedures

  3. Project Finance and Investments

    Broader source: Energy.gov [DOE]

    Plenary III: Project Finance and Investment Project Finance and Investments Chris Cassidy, National Business Renewable Energy Advisor, U.S. Department of Agriculture

  4. Falls Creek Hydroelectric Project

    SciTech Connect (OSTI)

    Gustavus Electric Company; Richard Levitt; DOE Project Officer - Keith Bennett

    2007-06-12

    This project was for planning and construction of a 700kW hydropower project on the Fall River near Gustavus, Alaska.

  5. Analysis, Dimensioning and Robust Control of Shunt Active Filter for Harmonic Currents Compensation in Electrical Mains

    E-Print Network [OSTI]

    Tilli, Andrea; Conficoni, Christian

    2011-01-01

    In this chapter some results related to Shunt Active Filters (SAFs) and obtained by the authors and some coauthors are reported. SAFs are complex power electronics equipments adopted to compensate for cur-rent harmonic pollution in electric mains, due to nonlinear loads. By using a proper "floating" capacitor as energy reservoir, the SAF purpose is to inject in the line grid currents canceling the polluting har-monics. Control algorithms play a key role for such devices and, in general, in many power electronics applications. Moreover, systems theory is crucial, since it is the mathematical tool that enables a deep understanding of the involved dynamics of such systems, allowing a correct dimensioning, beside an effective control. As a matter of facts, current injection objective can be straightforwardly formulated as an output tracking control problem. In this fashion, the structural and insidious marginally-stable internal/zero dynamics of SAFs can be immediately highlighted and characterized in terms of si...

  6. Multiple layer optical memory system using second-harmonic-generation readout

    DOE Patents [OSTI]

    Boyd, Gary T. (Woodbury, MN); Shen, Yuen-Ron (Berkeley, CA)

    1989-01-01

    A novel optical read and write information storage system is described which comprises a radiation source such as a laser for writing and illumination, the radiation source being capable of radiating a preselected first frequency; a storage medium including at least one layer of material for receiving radiation from the radiation source and capable of being surface modified in response to said radiation source when operated in a writing mode and capable of generating a pattern of radiation of the second harmonic of the preselected frequency when illuminated by the radiation source at the preselected frequency corresponding to the surface modifications on the storage medium; and a detector to receive the pattern of second harmonic frequency generated.

  7. Adaptive Selective Harmonic Minimization Based on ANNs for Cascade Multilevel Inverters With Varying DC Sources

    SciTech Connect (OSTI)

    Filho, Faete [ORNL; Maia, Helder Z [UFMS, Department of Electrical Engineering; Mateus, Tiago Henrique D [ORNL; Ozpineci, Burak [ORNL; Tolbert, Leon M [ORNL; Pinto, Joao Onofre P [ORNL

    2013-01-01

    A new approach for modulation of an 11-level cascade multilevel inverter using selective harmonic elimination is presented in this paper. The dc sources feeding the multilevel inverter are considered to be varying in time, and the switching angles are adapted to the dc source variation. This method uses genetic algorithms to obtain switching angles offline for different dc source values. Then, artificial neural networks are used to determine the switching angles that correspond to the real-time values of the dc sources for each phase. This implies that each one of the dc sources of this topology can have different values at any time, but the output fundamental voltage will stay constant and the harmonic content will still meet the specifications. The modulating switching angles are updated at each cycle of the output fundamental voltage. This paper gives details on the method in addition to simulation and experimental results.

  8. Probing the noncommutative structure of space with a quantum harmonic oscillator driven by gravitational wave

    E-Print Network [OSTI]

    Saha, Anirban

    2015-01-01

    We investigate the quantum mechanical transitions, induced by the combined effect of Gravitational wave (GW) and noncommutative (NC) structure of space, among the states of a 2-dimensional harmonic oscillator. The phonon modes excited by the passing GW within the resonant bar-detector are formally identical to forced harmonic oscillator and they represent a length variation of roughly the same order of magnitude as the characteristic length-scale of spatial noncommutativity estimated from the phenomenological upper bound of the NC parameter. This motivates our present work. We employ a number of different GW wave-forms that are typically expected from possible astronomical sources. We find that the transition probablities are quite sensitive to the nature of polarization of the GW. We further elaborate on the particular type of sources of GW radiation which can induce transitions that can be used as effective probe of the spatial noncommutative structure.

  9. Increased efficiency of ion acceleration by using femtosecond laser pulses at higher harmonic frequency

    SciTech Connect (OSTI)

    Psikal, J., E-mail: jan.psikal@fjfi.cvut.cz [FNSPE, Czech Technical University in Prague, 11519 Prague (Czech Republic); Klimo, O. [FNSPE, Czech Technical University in Prague, 11519 Prague (Czech Republic); ELI-Beamlines Project, Institute of Physics of the ASCR, 18221 Prague (Czech Republic); Weber, S.; Margarone, D. [ELI-Beamlines Project, Institute of Physics of the ASCR, 18221 Prague (Czech Republic)

    2014-07-15

    The influence of laser frequency on laser-driven ion acceleration is investigated by means of two-dimensional particle-in-cell simulations. When ultrashort intense laser pulse at higher harmonic frequency irradiates a thin solid foil, the target may become re lativistically transparent for significantly lower laser pulse intensity compared with irradiation at fundamental laser frequency. The relativistically induced transparency results in an enhanced heating of hot electrons as well as increased maximum energies of accelerated ions and their numbers. Our simulation results have shown the increase in maximum proton energy and increase in the number of high-energy protons by a factor of 2 after the interaction of an ultrashort laser pulse of maximum intensity 7?×?10{sup 21?}W/cm{sup 2} with a fully ionized plastic foil of realistic density and of optimal thickness between 100?nm and 200?nm when switching from the fundamental frequency to the third harmonics.

  10. Analysis and Control of Period-Doubling Bifurcation in Buck Converters Using Harmonic Balance

    E-Print Network [OSTI]

    Chung-Chieh Fang; Eyad H. Abed

    2012-10-27

    Period doubling bifurcation in buck converters is studied by using the harmonic balance method. A simple dynamic model of a buck converter in continuous conduction mode under voltage mode or current mode control is derived. This model consists of the feedback connection of a linear system and a nonlinear one. An exact harmonic balance analysis is used to obtain a necessary and sufficient condition for a period doubling bifurcation to occur. If such a bifurcation occurs, the analysis also provides information on its exact location. Using the condition for bifurcation, a feedforward control is designed to eliminate the period doubling bifurcation. This results in a wider range of allowed source voltage, and also in improved line regulation.

  11. Methods, systems and apparatus for approximation of peak summed fundamental and third harmonic voltages in a multi-phase machine

    DOE Patents [OSTI]

    Ransom, Ray M. (Big Bear City, CA); Gallegos-Lopez, Gabriel (Torrance, CA); Kinoshita, Michael H. (Redondo Beach, CA)

    2012-07-31

    Methods, system and apparatus are provided for quickly approximating a peak summed magnitude (A) of a phase voltage (Vph) waveform in a multi-phase system that implements third harmonic injection.

  12. The (4,0) and (4,4) supersymmetric nonlinear. sigma. -models in the D = 2 harmonic superspace

    SciTech Connect (OSTI)

    Lhallabi, T.; Saidi, E.H. (L.P.T. Faculte des Sciences, Av. Ibn Battouta, P.O. Box 1014, Rabat (MA))

    1988-01-01

    The D = 2(4,0) and (4,4) harmonic superspace are constructed. Nonlinear supersymmetric {sigma}-models for both real and complex (4,0) matter multiplets are obtained. Other features are also discussed.

  13. Zero energy correction method for non-Hermitian Harmonic oscillator with simultaneous transformation of co-ordinate and momentum and

    E-Print Network [OSTI]

    Biswanath Rath; P. Mallick

    2015-01-25

    We propose zero energy correction method for non-Hermiition Harmonic oscillator under simultaneous transformation of co-ordinate $(x \\rightarrow \\frac{(x+ i\\lambda p)}{\\sqrt{(1+\\beta \\lambda)}}$ and momentum $(p \\rightarrow \\frac{(p+ i\\beta x)}{\\sqrt{(1+\\beta \\lambda)}}$ for getting energy eigenvalue in place of extending the idea of gaugelike transformation proposed earlier in momentum transformation $(p \\rightarrow p+i\\beta x)$ by Z.Ahmed [Phys.Lett A 294,287 (2002)]. Further energy of non-Hermitian Harmonic oscillator remains the same as that of Harmonic oscillator. PACS: 03. 65 Db Key words.Non-Hermitian Harmonic oscillator, Perturbation theory,Energy level.

  14. Pulse-modulated second harmonic imaging microscope quantitatively demonstrates marked increase of collagen in tumor after chemotherapy

    E-Print Network [OSTI]

    Raja, Anju M.

    Pulse-modulated second harmonic imaging microscopes (PM-SHIMs) exhibit improved signal-to-noise ratio (SNR) over conventional SHIMs on sensitive imaging and quantification of weak collagen signals inside tissues. We quantify ...

  15. Fourth-order harmonic generation during parametric four-wave mixing in the filaments in ambient air

    SciTech Connect (OSTI)

    Ganeev, R. A. [Raja Ramanna Centre for Advanced Technology, Indore 425 013 (India); Institute of Electronics, 33 Dormon Yoli Street, Tashkent 100 125 (Uzbekistan); Singhal, H.; Naik, P. A.; Chakera, J. A.; Kumar, M.; Gupta, P. D. [Raja Ramanna Centre for Advanced Technology, Indore 425 013 (India)

    2010-10-15

    We propose a simplified scheme for efficient 200-nm pulse generation in isotropic medium using 800-nm radiation. The observation and optimization of the fourth-order harmonic generation during two-color filamentation in air are reported. This parametric process is based on four-wave mixing of the fundamental and the second-order harmonic radiation of the Ti:sapphire laser. A systematic study of the influence of the laser intensity, the polarization, the chirp, and the pulse duration on the fourth-order harmonic output from the filaments has been carried out. The fourth-order harmonic conversion efficiency was estimated to be of the order of 10{sup -4}.

  16. High-order harmonic generation in atomic hydrogen at 248 nm: Dipole-moment versus acceleration spectrum

    E-Print Network [OSTI]

    Jiang, Tsin-Fu; Chu, Shih-I

    1992-12-01

    We present a study of the high-order harmonic-generation (HG) spectra of atomic hydrogen at 248 nm based on the Fourier transform of the expectation values of the induced dipole moment and acceleration. The calculations ...

  17. Effects of broad-banded higher harmonics on fatigue damage of risers due to vortex-induced vibrations

    E-Print Network [OSTI]

    Price, Rachel Elizabeth

    2011-01-01

    Recent works have discussed "chaotic" or "Type-II" riser motion and suggested that it is a general feature of VIV riser response. Chaotic riser response contains broad-banded harmonics and a combination of standing and ...

  18. Extension of high-order harmonic generation cutoff via coherent control of intense few-cycle chirped laser pulses

    E-Print Network [OSTI]

    Carrera, Juan J.; Chu, Shih-I

    2007-03-16

    We present an ab initio quantum investigation of the high-order harmonic generation (HHG) cutoff extension using intense few-cycle chirped laser pulses. For a few-cycle chirped driving laser pulse, it is shown that significant ...

  19. Design of a Low Power 70MHz-110MHz Harmonic Rejection Filter with Class-AB Output Stage 

    E-Print Network [OSTI]

    Huang, Shan

    2011-08-08

    An FM transmitter becomes the new feature in recent portable electronic development. A low power, integrable FM transmitter filter IC is required to meet the demand of FM transmitting feature. A low pass filter using harmonic rejection technique...

  20. Continuous-wave operation of a frequency-tunable 460-GHz second-harmonic gyrotron for enhanced nuclear magnetic resonance

    E-Print Network [OSTI]

    Torrezan de Sousa, Antonio Carlos

    The design, operation, and characterization of a continuous-wave (CW) tunable second-harmonic 460-GHz gyrotron are reported. The gyrotron is intended to be used as a submillimeter-wave source for 700-MHz nuclear magnetic ...