National Library of Energy BETA

Sample records for added product surface

  1. ARM Climate Research Facility Spectral Surface Albedo Value-Added Product (VAP) Report

    SciTech Connect (OSTI)

    McFarlane, S; Gaustad, K; Long, C; Mlawer, E

    2011-07-15

    This document describes the input requirements, output data products, and methodology for the Spectral Surface Albedo (SURFSPECALB) value-added product (VAP). The SURFSPECALB VAP produces a best-estimate near-continuous high spectral resolution albedo data product using measurements from multifilter radiometers (MFRs). The VAP first identifies best estimates for the MFR downwelling and upwelling shortwave irradiance values, and then calculates narrowband spectral albedo from these best-estimate irradiance values. The methodology for finding the best-estimate values is based on a simple process of screening suspect data and backfilling screened and missing data with estimated values when possible. The resulting best-estimate MFR narrowband spectral albedos are used to determine a daily surface type (snow, 100% vegetation, partial vegetation, or 0% vegetation). For non-snow surfaces, a piecewise continuous function is used to estimate a high spectral resolution albedo at 1 min temporal and 10 cm-1 spectral resolution.

  2. Adding Value to Agricultural Products 

    E-Print Network [OSTI]

    Anderson, David P.; Hanselka, Daniel

    2009-06-01

    You can significantly increase farm income by adding value to agricultural products and marketing those products effectively. This publication explains how to design a value-added product based on consumer preferences and how to build a business...

  3. Emergent quantum criticality, Fermi surfaces, and AdS2

    E-Print Network [OSTI]

    Thomas Faulkner; Hong Liu; John McGreevy; David Vegh

    2011-10-30

    Gravity solutions dual to d-dimensional field theories at finite charge density have a near-horizon region which is AdS_2 x R^{d-1}. The scale invariance of the AdS_2 region implies that at low energies the dual field theory exhibits emergent quantum critical behavior controlled by a (0+1)-dimensional CFT. This interpretation sheds light on recently-discovered holographic descriptions of Fermi surfaces, allowing an analytic understanding of their low-energy excitations. For example, the scaling behavior near the Fermi surfaces is determined by conformal dimensions in the emergent IR CFT. In particular, when the operator is marginal in the IR CFT, the corresponding spectral function is precisely of the "Marginal Fermi Liquid" form, postulated to describe the optimally doped cuprates.

  4. Merged Sounding Value-Added Product

    SciTech Connect (OSTI)

    Troyan, D

    2010-03-03

    The Merged Sounding value-added product (VAP) uses a combination of observations from radiosonde soundings, the microwave radiometer (MWR), surface meteorological instruments, and European Centre for Medium-Range Weather Forecasts (ECMWF) model output with a sophisticated scaling/interpolation/smoothing scheme in order to define profiles of the atmospheric thermodynamic state at one-minute temporal intervals and a total of 266 altitude levels.

  5. Interpolated Sounding Value-Added Product

    SciTech Connect (OSTI)

    Troyan, D

    2013-04-01

    The Interpolated Sounding (INTERPSONDE) value-added product (VAP) uses a combination of observations from radiosonde soundings, the microwave radiometer (MWR), and surface meteorological instruments in order to define profiles of the atmospheric thermodynamic state at one-minute temporal intervals and a total of at least 266 altitude levels. This VAP is part of the Merged Sounding (MERGESONDE) suite of VAPs. INTERPSONDE is the profile of the atmospheric thermodynamic state created using the algorithms of MERGESONDE without including the model data from the European Centre for Medium-range Weather Forecasting (ECMWF). More specifically, INTERPSONDE VAP represents an intermediate step within the larger MERGESONDE process.

  6. Production Requirements Full-Page Ads

    E-Print Network [OSTI]

    Buehrer, R. Michael

    Production Requirements Full-Page Ads · The final trim size for a full-page ad is 8.75" x 10.875". · Full-page ads should also include .125-inch bleed on all four sides, making the total image area 9" x if over-trimming occurs in the printing process. 1/2-Page and 1/3-Page Ads · The final trim size for a 1

  7. ARM KAZR-ARSCL Value Added Product

    SciTech Connect (OSTI)

    Jensen, Michael

    2012-09-28

    The Ka-band ARM Zenith Radars (KAZRs) have replaced the long-serving Millimeter Cloud Radars, or MMCRs. Accordingly, the primary MMCR Value Added Product (VAP), the Active Remote Sensing of CLouds (ARSCL) product, is being replaced by a KAZR-based version, the KAZR-ARSCL VAP. KAZR-ARSCL provides cloud boundaries and best-estimate time-height fields of radar moments.

  8. ARM KAZR-ARSCL Value Added Product

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

    Jensen, Michael

    The Ka-band ARM Zenith Radars (KAZRs) have replaced the long-serving Millimeter Cloud Radars, or MMCRs. Accordingly, the primary MMCR Value Added Product (VAP), the Active Remote Sensing of CLouds (ARSCL) product, is being replaced by a KAZR-based version, the KAZR-ARSCL VAP. KAZR-ARSCL provides cloud boundaries and best-estimate time-height fields of radar moments.

  9. ARM - Value-Added Products (VAP)

    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 Act LogogovDataValue-Added Products

  10. Operator Product Expansion for Pure Spinor Superstring on AdS(5)*S(5)

    E-Print Network [OSTI]

    Valentina Giangreco M. Puletti

    2006-07-16

    The tree-level operator product expansion coefficients of the matter currents are calculated in the pure spinor formalism for type IIB superstring in the AdS(5)*S(5) background.

  11. Schwinger Pair Production in dS_2 and AdS_2

    E-Print Network [OSTI]

    Sang Pyo Kim; Don N. Page

    2009-02-20

    We study Schwinger pair production in scalar QED from a uniform electric field in dS_2 with scalar curvature R_{dS} = 2 H^2 and in AdS_2 with R_{AdS} = - 2 K^2. With suitable boundary conditions, we find that the pair-production rate is the same analytic function of the scalar curvature in both cases.

  12. A paucity of bulk entangling surfaces: AdS wormholes with de Sitter interiors

    E-Print Network [OSTI]

    Fischetti, S; Marolf, D; Wall, AC

    2015-01-01

    Inside the horizon with AdS / CFT, Phys.Rev. D67 (2003)entanglement entropy from AdS/CFT, Phys.Rev.Lett. 96 (2006)dual to Reissner-Nordstrm AdS 5 , JHEP 1404 (2014) 023, [

  13. Wood Products Marketing And Value-Added Opportunities

    E-Print Network [OSTI]

    Wood Products Marketing And Value-Added Opportunities In Latin America: A Focus on Brazil Richard Vlosky, Ph.D. Professor-Forest Products Marketing Interim Director-Louisiana Forest Products Laboratory Industry Strategic Services & Publisher: WOOD Markets Monthly newsletter WOOD Markets 2002 - The Solid Wood

  14. Wood Products Marketing And Value-Added Opportunities

    E-Print Network [OSTI]

    Wood Products Marketing And Value-Added Opportunities Richard Vlosky, Ph.D. Professor-Forest Products Marketing Interim Director-Louisiana Forest Products Laboratory School of Renewable Natural, R.E. Taylor & Associates Ltd. Forest Industry Strategic Services & Publisher: WOOD Markets Monthly

  15. Training Needs in Louisiana's Value-Added Forest Products Industry

    E-Print Network [OSTI]

    Training Needs in Louisiana's Value-Added Forest Products Industry Richard VloskyRichard VloskyLSU Agricultural Center England Air ParkEngland Air Park--January 18, 2005January 18, 2005 Louisiana Forest Products Development Center Louisiana Forest Products Development Center #12;Outline · Industry Development

  16. ARM - Value-Added Products (VAP)

    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 ofkandz-cm11 OutreachProductswsicloudwsicloudden Documentation Data Management Facility PlotsProducts (VAP) VAP Update

  17. Raman Lidar Profiles–Temperature (RLPROFTEMP) Value-Added Product

    SciTech Connect (OSTI)

    Newsom, RK; Sivaraman, C; McFarlane, SA

    2012-10-31

    The purpose of this document is to describe the Raman Lidar Profiles–Temperature (RLPROFTEMP) value-added product (VAP) and the procedures used to derive atmospheric temperature profiles from the raw RL measurements. Sections 2 and 4 describe the input and output variables, respectively. Section 3 discusses the theory behind the measurement and the details of the algorithm, including calibration and overlap correction.

  18. Organic Aerosol Component (OACOMP) Value-Added Product Report

    SciTech Connect (OSTI)

    Fast, J; Zhang, Q; Tilp, A; Shippert, T; Parworth, C; Mei, F

    2013-08-23

    Significantly improved returns in their aerosol chemistry data can be achieved via the development of a value-added product (VAP) of deriving OA components, called Organic Aerosol Components (OACOMP). OACOMP is primarily based on multivariate analysis of the measured organic mass spectral matrix. The key outputs of OACOMP are the concentration time series and the mass spectra of OA factors that are associated with distinct sources, formation and evolution processes, and physicochemical properties.

  19. An Operator Product Expansion for the Mutual Information in AdS/CFT

    E-Print Network [OSTI]

    Javier Molina-Vilaplana

    2014-09-11

    We investigate the behaviour of the mutual information $\\mathcal{I}_{AB}$ between two "small" and wide separated spherical regions $A$ and $B$ in the $\\mathcal{N}=4$ SYM gauge theory dual to Type IIB string theory in $AdS_5 \\times S^5$. To this end, the mutual information is recasted in terms of correlators of surface operators $\\mathcal{W}\\left( \\Sigma\\right)$ defined along a surface $\\Sigma$ within the boundary gauge theory. This construction relies on the strong analogies between the twist field operators appearing in the replica trick method used for the computation of the entanglement entropy, and the disorder-like surface operators in gauge theories. In the AdS/CFT correspondence, a surface operator $\\mathcal{W}\\left( \\Sigma\\right)$ corresponds to having a D3-brane in $AdS_5 \\times S^5$ ending on the boundary along the prescribed surface $\\Sigma$. Then, a long distance expansion for $\\mathcal{I}_{AB}$ is provided. The coefficients of the expansion appear as a byproduct of the operator product expansion for the correlators of the operators $\\mathcal{W}(\\Sigma)$ with the chiral primaries of the theory. We find that, while undergoing a phase transition at a critical distance, the holographic mutual information, instead of strictly vanishing, decays with a power law whose leading contributions of order $\\mathcal{O}(N^0)$, originate from the exchange of pairs of the lightest bulk particles between $A$ and $B$. These particles correspond to operators in the boundary field theory with the smallest scaling dimensions.

  20. Influences of Government Interventions on Increasing Value-Added Wood Product Exports from Ghana

    E-Print Network [OSTI]

    Influences of Government Interventions on Increasing Value-Added Wood Product Exports from Ghana exporting raw materials such lumber to exporting processed or value-added wood products. In the mid-1990s on increasing value-added exports. These actions are: 1) the imposition of a levy on air-dried lumber exports, 2

  1. Developing Louisiana's Forest Products Industry: Adding Value for the Future

    E-Print Network [OSTI]

    of a manufacturingThe increased value at each stage of a manufacturing assembly processassembly process Those and necessaryimportant and necessary Addition of net economic valueAddition of net economic value Value can be added through manufacturing orValue can be added through manufacturing or marketingmarketing Why Add Value

  2. 1 Savcor Indufor Oy 2006 Value-added Wood Products

    E-Print Network [OSTI]

    © Savcor Indufor Oy 2006 Role of China Furniture industry success: low production costs, especially labour ­ and efficiently managed factories with high technology and productivity (proper industrialization) Risk factor

  3. Scattering Amplitudes, the AdS/CFT Correspondence, Minimal Surfaces, and Integrability

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

    Alday, Luis F.

    2010-01-01

    We focus on the computation of scattering amplitudes of planar maximally supersymmetric Yang-Mill in four dimensions at strong coupling by means of the AdS/CFT correspondence and explain how the problem boils down to the computation of minimal surfaces in AdS in the first part of this paper. In the second part of this review we explain how integrability allows to give a solution to the problem in terms of a set of integral equations. The intention of the review is to give a pedagogical, rather than very detailed, exposition.

  4. Study of Cd-chalcogenide/ferri-ferrocyanide photoelectrochemical cells: effect of surface morphology and added salt

    SciTech Connect (OSTI)

    Tenne, R.

    1983-11-01

    The authors carried out an investigation of the Cd-chalcogenide/ferri-ferrocyanide photoelectrochemical cells. In particular, the effect of surface morphology and the effect of added salts upon the characteristics of these cells were investigated. Successive etching with Br/sub 2/ (3%)/methanol, aqua regia, and finally photoetching increases the surface roughness of CdSe (CdS, CdTe) which has a marked effect on the cell characteristics in the ferri-ferrocyanide electrolyte (and polysulfide electrolyte as well). In contrast with polysulfide electrolyte, added salts decrease the output stability of the cell and the onset potential for the photocurrent, which can be explained by the removal of the physiosorbed ferrocyanide ions from the electrode surface by the ions of the salt. On increasing the surface roughness of the electrode, while keeping the salt concentration unchanged, the output stability and the onset potential were increased. A kinetic model is used to explain these phenomena. Thus, added salts can be used to probe the strength of the adsorption of the active electrolyte on the surface of the photoelectrode. Finally, we report on the surface morphology of CdSe and CdTe after irradiation in ferri-ferrocyanide solution and compare our findings to surface morphologies which were observed previously with the help of photoelectrochemical etching (photoetching). It is found that small rectangular crystallites, probably of cadmium ferrocyanide, deposit on the crystal surface during the photocorrosion process in addition to elemental Se(Te).

  5. ARM Value-Added Cloud Products: Description and Status

    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 ofkandz-cm11 OutreachProductswsicloudwsicloudden Documentation Data Management Facility009 ARM Orientation454063Value-Added

  6. Photon and Dilepton Production in Soft Wall AdS/QCD

    E-Print Network [OSTI]

    A. Nata Atmaja; K. Schalm

    2010-08-05

    We consider the Soft-Wall-model of AdS/QCD to calculate photon production in strongly coupled Quark Gluon Plasma (sQGP). The IR cut-off only affects the low-frequency-component of the production rate. The full spectral function is determined numerically and shows remarkable similarity to computations of the photon production rate in AdS-duals of $\\cN=2$ theories with massive flavor. It is further support that Soft-Wall AdS-QCD correctly captures the IR physics of the chiral perturbation theory regime of QCD. We confirm this by relating the IR-effects of the massive flavor deformations to the AdS/QCD soft wall cut-off. The AdS/QCD spectral function is smooth, however, and unlike massive flavor models shows no spectral peaks.

  7. Diffractive vector meson production at HERA using holographic AdS/QCD wavefunctions

    E-Print Network [OSTI]

    Jeff Forshaw; Ruben Sandapen

    2013-05-16

    We demonstrate another success of the AdS/QCD correspondence by showing that an AdS/QCD holographic light-front wavefunction for the $\\rho$ meson generates predictions for the cross-sections of diffractive $\\rho$ production that are in agreement with data collected at the HERA electron-proton collider.

  8. ANTIHYDROGEN PRODUCTION AND PRECISION SPECTROSCOPY WITH ATHENA/AD-1

    SciTech Connect (OSTI)

    M. HOLZSCHEITER; C. AMSLER; ET AL

    2000-11-01

    CPT invariance is a fundamental property of quantum field theories in flat space-time. Principal consequences include the predictions that particles and their antiparticles have equal masses and lifetimes, and equal and opposite electric charges and magnetic moments. It also follows that the fine structure, hyperfine structure, and Lamb shifts of matter and antimatter bound systems should be identical. It is proposed to generate new stringent tests of CPT using precision spectroscopy on antihydrogen atoms. An experiment to produce antihydrogen at rest has been approved for running at the Antiproton Decelerator (AD) at CERN. We describe the fundamental features of this experiment and the experimental approach to the first phase of the program, the formation and identification of low energy antihydrogen.

  9. OPPORTUNITIES FOR HORIZONTAL DIVERSIFICATION IN MANUFACTURING VALUE-ADDED WOOD PRODUCTS

    E-Print Network [OSTI]

    Wu, Qinglin

    OPPORTUNITIES FOR HORIZONTAL DIVERSIFICATION IN MANUFACTURING VALUE-ADDED WOOD PRODUCTS Working Post Doctoral Researcher Wood Products Processing Richard Vlosky Assistant Professor Forest Products Marketing February 7, 1996 #12;2 ABSTRACT A study of equipment usage in the Louisiana secondary wood

  10. 2D Gridded Surface Data Value-Added Product

    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 ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril 30,University RegistrationNeed2 2D Gridded

  11. Station-based Surface Data Value-Added Product

    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 AdministrationRobust,Field-effect Photovoltaics -7541C.3X-rays IlluminateStateIntent Concerningon51

  12. Issues in Value-Added Products from Biomass

    SciTech Connect (OSTI)

    Elliott, Douglas C.

    2001-11-01

    While biomass conversion to energy products has been the primary focus of most development efforts over the past 30 years, process development for chemical products is an area of increasing effort more recently. Although the fuels market is likely to allow the largest impact for renewable resources in the world economy, chemical products can also be more than just niche market applications. However, the specific chemical processing required for refined chemical products requires improved chemical handling methods for separations and purifications, as well as improved catalyst systems. Development of these unit operations has lagged behind the process research focused on the finished products. This paper will describe some of the critical processing issues that need to be addressed to allow biomass feedstocks to make a real impact in the chemicals market. The paper will also describe some of the process research which has been performed or is now underway in our laboratory and others'. Areas to be discussed include biomass component separation, catalyst development for aqueous processing, and trace component effects in catalytic processing of biomass feedstocks.

  13. G-Band Vapor Radiometer Precipitable Water Vapor (GVRPWV) Value-Added Product

    SciTech Connect (OSTI)

    Koontz, A; Cadeddu, M

    2012-12-05

    The G-Band Vapor Radiometer Precipitable Water Vapor (GVRPWV) value-added product (VAP) computes precipitable water vapor using neural network techniques from data measured by the GVR. The GVR reports time-series measurements of brightness temperatures for four channels located at 183.3 ± 1, 3, 7, and 14 GHz.

  14. Method for conversion of carbohydrate polymers to value-added chemical products

    DOE Patents [OSTI]

    Zhang, Zongchao C. (Norwood, NJ); Brown, Heather M. (Kennewick, WA); Su, Yu (Richland, WA)

    2012-02-07

    Methods are described for conversion of carbohydrate polymers in ionic liquids, including cellulose, that yield value-added chemicals including, e.g., glucose and 5-hydroxylmethylfurfural (HMF) at temperatures below 120.degree. C. Catalyst compositions that include various mixed metal halides are described that are selective for specified products with yields, e.g., of up to about 56% in a single step process.

  15. Resistive thrust production can be as crucial as added mass mechanisms for inertial undulatory swimmers

    E-Print Network [OSTI]

    Piñeirua, Miguel; Thiria, Benjamin

    2015-01-01

    In this paper, we address a crucial point regarding the description of moderate to high Reynolds numbers aquatic swimmers. For decades, swimming animals have been classified in two different families of propulsive mechanisms based on the Reynolds number: the "resistive" swimmers, using local friction to produce the necessary thrust force for locomotion at low Reynolds number and the "reactive" swimmers, lying in the high Reynolds range, and using added mass acceleration (described by perfect fluid theory). However, inertial swimmers are also systems that dissipate energy, due to their finite size, therefore involving strong resistive contributions, even for high Reynolds numbers. Using a complete model for the hydrodynamic forces, involving both reactive and resistive contributions, we revisit here the physical mechanisms responsible for the thrust production of such swimmers. We show, for instance, that the resistive part of the force balance is as crucial as added mass effects in the modeling of the thrust ...

  16. Quotation for the Value Added Assessment during Product Development and Production Processes

    E-Print Network [OSTI]

    Alain Bernard; Nicolas Perry; Jean-Charles Delplace; Serge Gabriel

    2010-11-26

    This communication is based on an original approach linking economical factors to technical and methodological ones. This work is applied to the decision process for mix production. This approach is relevant for costing driving systems. The main interesting point is that the quotation factors (linked to time indicators for each step of the industrial process) allow the complete evaluation and control of, on the one hand, the global balance of the company for a six-month period and, on the other hand, the reference values for each step of the process cycle of the parts. This approach is based on a complete numerical traceability and control of the processes (design and manufacturing of the parts and tools, mass production). This is possible due to numerical models and to feedback loops for cost indicator analysis at design and production levels. Quotation is also the base for the design requirements and for the choice and the configuration of the production process. The reference values of the quotation generate the base reference parameters of the process steps and operations. The traceability of real values (real time consuming, real consumable) is mainly used for a statistic feedback to the quotation application. The industrial environment is a steel sand casting company with a wide mix product and the application concerns both design and manufacturing. The production system is fully automated and integrates different products at the same time.

  17. Assessing the Economic Viability of Bio-based Products for Missouri Value-added Crop Production

    SciTech Connect (OSTI)

    Nicholas Kalaitzandonakes

    2005-11-30

    While research and development on biobased products has continued strong over the years, parallel attention on the economics and management of such product innovation has been lacking. With the financial support of the Department of Energy, the Economics and Management of Agrobiotechnology Center at the University of Missouri-Columbia has launched a pilot graduate education program that seeks to fill the gap. Within this context, a multi-disciplinary research and teaching program has been structured with an emphasis on new product and innovation economics and management. More specifically, this pilot graduate education program has the following major objectives: (1) To provide students with a strong background in innovation economics, management, and strategy. (2) To diversify the students academic background with coursework in science and technology. (3) To familiarize the student with biobased policy initiatives through interaction with state and national level organizations and policymakers. (4) To facilitate active collaboration with industry involved in the development and production of biobased products. The pilot education program seeks to develop human capital and research output. Although the research is, initially, focused on issues related to the State of Missouri, the results are expected to have national implications for the economy, producers, consumers and environment.

  18. Functionally gradient material for membrane reactors to convert methane gas into value-added products

    DOE Patents [OSTI]

    Balachandran, U.; Dusek, J.T.; Kleefisch, M.S.; Kobylinski, T.P.

    1996-11-12

    A functionally gradient material for a membrane reactor for converting methane gas into value-added-products includes an outer tube of perovskite, which contacts air; an inner tube which contacts methane gas, of zirconium oxide, and a bonding layer between the perovskite and zirconium oxide layers. The bonding layer has one or more layers of a mixture of perovskite and zirconium oxide, with the layers transitioning from an excess of perovskite to an excess of zirconium oxide. The transition layers match thermal expansion coefficients and other physical properties between the two different materials. 7 figs.

  19. Functionally gradient material for membrane reactors to convert methane gas into value-added products

    DOE Patents [OSTI]

    Balachandran, Uthamalingam (Hinsdale, IL); Dusek, Joseph T. (Lombard, IL); Kleefisch, Mark S. (Napersville, IL); Kobylinski, Thadeus P. (Lisle, IL)

    1996-01-01

    A functionally gradient material for a membrane reactor for converting methane gas into value-added-products includes an outer tube of perovskite, which contacts air; an inner tube which contacts methane gas, of zirconium oxide, and a bonding layer between the perovskite and zirconium oxide layers. The bonding layer has one or more layers of a mixture of perovskite and zirconium oxide, with the layers transitioning from an excess of perovskite to an excess of zirconium oxide. The transition layers match thermal expansion coefficients and other physical properties between the two different materials.

  20. Value-Added Products From FGD Sulfite-Rich Scrubber Materials

    SciTech Connect (OSTI)

    Vivak M. Malhotra

    2006-09-30

    Massive quantities of sulfite-rich flue gas desulfurization (FGD) scrubber materials are produced every year in the USA. In fact, at present, the production of wet sulfite-rich scrubber cake outstrips the production of wet sulfate-rich scrubber cake by about 6 million tons per year. However, most of the utilization focus has centered on FGD gypsum. Therefore, we have recently initiated research on developing new strategies for the economical, but environmentally-sound, utilization of sulfite-rich scrubber material. In this exploratory project (Phase I), we attempted to ascertain whether it is feasible to develop reconstituted wood replacement products from sulfite-rich scrubber material. In pursuit of this goal, we characterized two different wet sulfite-rich scrubber materials, obtained from two power plants burning Midwestern coal, for their suitability for the development of value-added products. The overall strategy adopted was to fabricate composites where the largest ingredient was scrubber material with additional crop materials as additives. Our results suggested that it may be feasible to develop composites with flexural strength as high as 40 MPa (5800 psi) without the addition of external polymers. We also attempted to develop load-bearing composites from scrubber material, natural fibers, and phenolic polymer. The polymer-to-solid ratio was limited to {le} 0.4. The formulated composites showed flexural strengths as high as 73 MPa (10,585 psi). We plan to harness the research outcomes from Phase I to develop parameters required to upscale our value-added products in Phase II.

  1. IIFET 2010 Montpellier Proceedings5 Species Products Areas/ localisation Actors Product typicity Adding-value Tools

    E-Print Network [OSTI]

    Boyer, Edmond

    ; different fishing villages Small-scale fishermen Not really (only extensive fishing methods which do not overexploit the stocks : handline ; encircling gillnet « félé-félé » ; beach seine) Fair-Fish, Switzerland of the Sea 2007 World Export : Swiss consumer via Migros supermarket + minimum of fair- fish products

  2. Value-Added Products from FGD Sulfite-Rich Scrubber Materials

    SciTech Connect (OSTI)

    Vivak Malhotra

    2010-01-31

    According to the American Coal Ash Association, about 29.25 million tons of flue gas desulfurization (FGD) byproducts were produced in the USA in 2003. Out of 29.25 million tons, 17.35 million tons were sulfite-rich scrubber materials. At present, unlike its cousin FGD gypsum, the prospect for effective utilization of sulfite-rich scrubber materials is not bright. In fact, almost 16.9 million tons are leftover every year. In our pursuit to mitigate the liability of sulfite-rich FGD scrubber materials' disposal, we are attempting to develop value-added products that can commercially compete. More specifically, for this Innovative Concept Phase I project, we have the following objectives: to characterize the sulfite-rich scrubber material for toxic metals; to optimize the co-blending and processing of scrubber material and natural byproducts; to formulate and develop structural composites from sulfite-rich scrubber material; and to evaluate the composites' mechanical properties and compare them with current products on the market. After successfully demonstrating the viability of our research, a more comprehensive approach will be proposed to take these value-added materials to fruition.

  3. Process and targets for production of no-carrier-added radiotin

    DOE Patents [OSTI]

    Srivastava, Suresh C; Zhuikov, Boris Leonidovich; Ermolaev, Stanislav Victorovich; Konyakhin, Nikolay Alexandrovich; Kokhanyuk, Vladimir Mikhailovich; Khamyanov, Stepan Vladimirovich; Togaeva, Natalya Roaldovna

    2014-04-22

    One embodiment of the present invention includes a process for production and recovery of no-carrier-added radioactive tin (NCA radiotin). An antimony target can be irradiated with a beam of accelerated particles forming NCA radiotin, followed by separation of the NCA radiotin from the irradiated target. The target is metallic Sb in a hermetically sealed shell. The shell can be graphite, molybdenum, or stainless steel. The irradiated target can be removed from the shell by chemical or mechanical means, and dissolved in an acidic solution. Sb can be removed from the dissolved irradiated target by extraction. NCA radiotin can be separated from the remaining Sb and other impurities using chromatography on silica gel sorbent. NCA tin-117m can be obtained from this process. NCA tin-117m can be used for labeling organic compounds and biological objects to be applied in medicine for imaging and therapy of various diseases.

  4. Correlation Of Surface Heat Loss And Total Energy Production...

    Open Energy Info (EERE)

    Correlation Of Surface Heat Loss And Total Energy Production For Geothermal Systems Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: Correlation...

  5. Communities of Pottery Production and Consumption on the Taraco Peninsula, Bolivia, 200 BC-300 AD

    E-Print Network [OSTI]

    Roddick, Andrew Paul

    2009-01-01

    worlds: ceramic production and consumption in Banda, Ghanaceramic economies: production and consumption of householdceramic economies: production and consumption of household

  6. MODIFICATION OF SURFACE AND TRIBOLOGICAL PROPERTIES OF DLC FILMS BY ADDING SILVER CONTENT

    SciTech Connect (OSTI)

    Zhang, Hanshen S.; Endrino, Jose L.; Anders, Andre

    2008-06-12

    The incorporation of silver into the diamond-like carbon (DLC) coatings has shown excellent potential in various applications; therefore the surface and tribological properties of silver-containing DLC thin films deserve to be investigated. In this study we have deposited silver-containing hydrogenated and hydrogen-free DLC coatings by plasma immersion ion implantation and deposition (PIII-D) methods. Atomic force microscopy (AFM) and nano-scratch tests were used to study the surface and tribological properties. The silver incorporation had only slight effects on hydrogenated DLC coatings. However, the incorporation of silver has significant effect on hydrogen-free DLC of smoothing the surface and increasing the surface energy. Those effects have been illustrated and explained in the context of experimental results.

  7. ARM Climate Research Facility Quarterly Value-Added Product Report Fourth Quarter: July 1–September 30, 2012

    SciTech Connect (OSTI)

    Sivaraman, C

    2012-11-13

    The purpose of this report is to provide a concise status update for value-added products (VAP) implemented by the Atmospheric Radiation Measurement (ARM) Climate Research Facility. The report is divided into the following sections: (1) new VAPs for which development has begun, (2) progress on existing VAPs, (3) future VAPs that have been recently approved, (4) other work that leads to a VAP, and (5) top requested VAPs from the archive.

  8. ARM Climate Research Facility Quarterly Value-Added Product Report Fourth Quarter: July 01–September 30, 2011

    SciTech Connect (OSTI)

    Sivaraman, C

    2011-11-02

    The purpose of this report is to provide a concise status update for value-added products (VAP) implemented by the Atmospheric Radiation Measurement Climate Research Facility. The report is divided into the following sections: (1) new VAPs for which development has begun, (2) progress on existing VAPs, (3) future VAPs that have been recently approved, (4) other work that leads to a VAP, and (5) top requested VAPs from the archive. New information is highlighted in blue text. New information about processed data by the developer is highlighted in red text.

  9. CEICEI--BoisBois European Confederation of Woodworking IndustriesEuropean Confederation of Woodworking Industries ValueValue--added wood productsadded wood products

    E-Print Network [OSTI]

    of Woodworking Industries ValueValue--added wood productsadded wood products markets: flooringmarkets: flooring of Woodworking Industries Wood flooring and woodWood flooring and wood--based flooringbased flooring · "Genuine" wood ­ Solid products (parquet, planks, ...) ­ Products with a "genuine" top layer · Multilayer parquet

  10. Surface Ocean CO2 Atlas (SOCAT) gridded data products

    SciTech Connect (OSTI)

    Sabine, Christopher; Hankin, S.; Koyuk, H; Bakker, D C E; Pfeil, B; Olsen, A; Metzl, N; Fassbender, A; Manke, A; Malczyk, J; Akl, J; Alin, S R; Bellerby, R G J; Borges, A; Boutin, J; Cai, W-J; Chavez, F P; Chen, A; Cosa, C; Feely, R A; Gonzalez-Davila, M; Goyet, C; Hardman-Mountford, N; Heinze, C; Hoppema, M; Hunt, C W; Hydes, D; Ishii, M; Johannessen, T; Key, R M; Kortzinger, A; Landschutzer, P; Lauvset, S K; Lefevre, N; Lourantou, A; Mintrop, L; Miyazaki, C; Murata, A; Nakadate, A; Nakano, Y; Nakaoka, S; Nojiri, Y; et al.

    2013-01-01

    A well documented, publicly available, global data set for surface ocean carbon dioxide (CO2) parameters has been called for by international groups for nearly two decades. The Surface Ocean CO2 Atlas (SOCAT) project was initiated by the international marine carbon science community in 2007 with the aim of providing a comprehensive, publicly available, regularly updated, global data set of marine surface CO2, which had been subject to quality control (QC). SOCAT version 1.5 was made public in September 2011 and holds 6.3 million quality controlled surface CO2 data from the global oceans and coastal seas, spanning four decades (1968 2007). The SOCAT gridded data is the second data product to come from the SOCAT project. Recognizing that some groups may have trouble working with millions of measurements, the SOCAT gridded product was generated to provide a robust regularly spaced fCO2 product with minimal spatial and temporal interpolation which should be easier to work with for many applications. Gridded SOCAT is rich with information that has not been fully explored yet, but also contains biases and limitations that the user needs to recognize and address.

  11. One-point Functions in AdS/dCFT from Matrix Product States

    E-Print Network [OSTI]

    Buhl-Mortensen, Isak; Kristjansen, Charlotte; Zarembo, Konstantin

    2015-01-01

    One-point functions of certain non-protected scalar operators in the defect CFT dual to the D3-D5 probe brane system with k units of world volume flux can be expressed as overlaps between Bethe eigenstates of the Heisenberg spin chain and a matrix product state. We present a closed expression of determinant form for these one-point functions, valid for any value of k. The determinant formula factorizes into the k=2 result times a k-dependent prefactor. Making use of the transfer matrix of the Heisenberg spin chain we recursively relate the matrix product state for higher even and odd k to the matrix product state for k=2 and k=3 respectively. We furthermore find evidence that the matrix product states for k=2 and k=3 are related via a ratio of Baxter's Q-operators. The general k formula has an interesting thermodynamical limit involving a non-trivial scaling of k, which indicates that the match between string and field theory one-point functions found for chiral primaries might be tested for non-protected ope...

  12. Influences of Government Interventions on Increasing Value-Added Wood Product Exports from Ghana

    E-Print Network [OSTI]

    #77 Louisiana Forest Products Development Center School of Renewable Natural Resources Louisiana State of Renewable Natural Resources, Louisiana State University Agricultural Center, Baton Rouge, Louisiana 3, these policies are considered to be effective in relieving pressure on natural forests and increasing further

  13. Production of coal-based fuels and value-added products: coal to liquids using petroleum refinery streams

    SciTech Connect (OSTI)

    Clifford, C.E.B.; Schobert, H.H.

    2008-07-01

    We are studying several processes that utilize coal, coal-derived materials, or biomass in existing refining facilities. A major emphasis is the production of a coal-based replacement for JP-8 jet fuel. This fuel is very similar to Jet A and jet A-1 in commercial variation, so this work has significant carry-over into the private sector. We have been focusing on three processes that would be retrofitted into a refinery: (1) coal tar/refinery stream blending and hydro-treatment; (2) coal extraction using refinery streams followed by hydro-treatment; and (3) co-coking of coal blended with refinery streams. 4 figs., 5 tabs.

  14. Evaluation of GCM Column Radiation Models Under Cloudy Conditions with The Arm BBHRP Value Added Product

    SciTech Connect (OSTI)

    Dr. Lazaros Oreopoulos and Dr. Peter M. Norris

    2010-03-14

    The overarching goal of the project was to improve the transfer of solar and thermal radiation in the most sophisticated computer tools that are currently available for climate studies, namely Global Climate Models (GCMs). This transfer can be conceptually separated into propagation of radiation under cloudy and under cloudless conditions. For cloudless conditions, the factors that affect radiation propagation are gaseous absorption and scattering, aerosol particle absorption and scattering and surface albedo and emissivity. For cloudy atmospheres the factors are the various cloud properties such as cloud fraction, amount of cloud condensate, the size of the cloud particles, and morphological cloud features such as cloud vertical location, cloud horizontal and vertical inhomogeneity and cloud shape and size. The project addressed various aspects of the influence of the above contributors to atmospheric radiative transfer variability. In particular, it examined: (a) the quality of radiative transfer for cloudless and non-complex cloudy conditions for a substantial number of radiation algorithms used in current GCMs; (b) the errors in radiative fluxes from neglecting the horizontal variabiity of cloud extinction; (c) the statistical properties of cloud horizontal and vertical cloud inhomogeneity that can be incorporated into radiative transfer codes; (d) the potential albedo effects of changes in the particle size of liquid clouds; (e) the gaseous radiative forcing in the presence of clouds; and (f) the relative contribution of clouds of different sizes to the reflectance of a cloud field. To conduct the research in the various facets of the project, data from both the DOE ARM project and other sources were used. The outcomes of the project will have tangible effects on how the calculation of radiative energy will be approached in future editions of GCMs. With better calculations of radiative energy in GCMs more reliable predictions of future climate states will be attainable, thus affecting public policy decisions with great impact to public life.

  15. Validating MODIS land surface temperature products using long-term nighttime ground measurements

    E-Print Network [OSTI]

    Liang, Shunlin

    Validating MODIS land surface temperature products using long-term nighttime ground measurements, provides multiple land surface temperature (LST) products on a daily basis. However, these products have LST products, MOD11_L2 (version 4) and MOD07_L2 (version 4), using the FLUXNET and Carbon Europe

  16. Refined Holographic Entanglement Entropy for the AdS Solitons and AdS black Holes

    E-Print Network [OSTI]

    Masafumi Ishihara; Feng-Li Lin; Bo Ning

    2013-04-04

    We consider the refinement of the holographic entanglement entropy for the holographic dual theories to the AdS solitons and AdS black holes, including the corrected ones by the Gauss-Bonnet term. The refinement is obtained by extracting the UV-independent piece of the holographic entanglement entropy, the so-called renormalized entanglement entropy which is independent of the choices of UV cutoff. Our main results are (i) the renormalized entanglement entropies of the AdS$_{d+1}$ soliton for $d=4,5$ are neither monotonically decreasing along the RG flow nor positive definite, especially around the deconfinement/confinement phase transition; (ii) there is no topological entanglement entropy for AdS$_5$ soliton even with Gauss-Bonnet correction; (iii) for the AdS black holes, the renormalized entanglement entropy obeys an expected volume law at IR regime, and the transition between UV and IR regimes is a smooth crossover even with Gauss-Bonnet correction; (iv) based on AdS/MERA conjecture, we postulate that the IR fixed-point state for the non-extremal AdS soliton is a trivial product state.

  17. Process for leveling film surfaces and products thereof

    DOE Patents [OSTI]

    Birkmire, R.W.; McCandless, B.E.

    1990-03-20

    Semiconductor films and photovoltaic devices prepared therefrom are provided wherein the semiconductor films have a specular surface with a texture less than about 0.25 micron greater than the average planar film surface and wherein the semiconductor films are surface modified by exposing the surface to an aqueous solution of bromine containing an acid or salt and continuing such exposure for a time sufficient to etch the surface. 8 figs.

  18. Further reduction of efficiency droop effect by adding a lower-index dielectric interlayer in a surface plasmon coupled blue light-emitting diode with surface metal nanoparticles

    SciTech Connect (OSTI)

    Lin, Chun-Han; Su, Chia-Ying; Chen, Chung-Hui; Yao, Yu-Feng; Shih, Pei-Ying; Chen, Horng-Shyang; Hsieh, Chieh; Kiang, Yean-Woei Yang, C. C.; Kuo, Yang

    2014-09-08

    Further reduction of the efficiency droop effect and further enhancements of internal quantum efficiency (IQE) and output intensity of a surface plasmon coupled, blue-emitting light-emitting diode (LED) by inserting a dielectric interlayer (DI) of a lower refractive index between p-GaN and surface Ag nanoparticles are demonstrated. The insertion of a DI leads to a blue shift of the localized surface plasmon (LSP) resonance spectrum and increases the LSP coupling strength at the quantum well emitting wavelength in the blue range. With SiO{sub 2} as the DI, a thinner DI leads to a stronger LSP coupling effect, when compared with the case of a thicker DI. By using GaZnO, which is a dielectric in the optical range and a good conductor under direct-current operation, as the DI, the LSP coupling results in the highest IQE, highest LED output intensity, and weakest droop effect.

  19. Sensory analysis of acidified dairy products using response surface methodology 

    E-Print Network [OSTI]

    Rocha, Maria de Guadalupe

    1997-01-01

    Modified processing techniques to reduce the time required to manufacture and to improve the general characteristics of dairy products have been developed. Direct acidification is a method to produce acidified milk products. ...

  20. Affine transformation crossed product like algebras and noncommutative surfaces

    E-Print Network [OSTI]

    Joakim Arnlind; Sergei Silvestrov

    2009-03-11

    Several classes of *-algebras associated to the action of an affine transformation are considered, and an investigation of the interplay between the different classes of algebras is initiated. Connections are established that relate representations of *-algebras, geometry of algebraic surfaces, dynamics of affine transformations, graphs and algebras coming from a quantization procedure of Poisson structures. In particular, algebras related to surfaces being inverse images of fourth order polynomials (in R^3) are studied in detail, and a close link between representation theory and geometric properties is established for compact as well as non-compact surfaces.

  1. Addendum Added to Innovative Demonstration of Geothermal Energy...

    Office of Environmental Management (EM)

    Addendum Added to Innovative Demonstration of Geothermal Energy Production FOA Addendum Added to Innovative Demonstration of Geothermal Energy Production FOA July 2, 2010 - 2:13pm...

  2. Black holes, AdS, and CFTs

    E-Print Network [OSTI]

    Marolf, Donald

    2009-01-01

    Boundary observables and AdS/CFT . . . . .Unitiarity and AdS/CFT . . . . . . . . . . . . Thecharges in asymptotically AdS-spacetimes. Class. Quant.

  3. Soil CO2 production and surface flux at four climate observatories in eastern Canada

    E-Print Network [OSTI]

    Beltrami, Hugo

    Soil CO2 production and surface flux at four climate observatories in eastern Canada David Risk December 2002. [1] Soils constitute the largest terrestrial source of carbon dioxide to the atmosphere the climatic controls on soil respiration. We use subsurface CO2 concentrations, surface CO2 flux and detailed

  4. Method for forming a layer of synthetic corrosion products on tubing surfaces

    DOE Patents [OSTI]

    Lane, Michael H. (Clifton Park, NY); Salamon, Eugene J. M. (Clifton Park, NY)

    1996-01-01

    A method is provided for forming a synthetic corrosion product layer on tube surfaces. The method utilizes two dissimilar materials with different coefficients of thermal expansion. An object tube and sacrificial tube are positioned one inside the other such that an annular region is created between the two tubes' surfaces. A slurry of synthetic corrosion products is injected into this annular region and the assembly is heat treated. This heat causes the tubes to expand, the inner tube with the higher coefficient of expansion expanding more than the outer tube, thereby creating internal pressures which consolidate the corrosion products and adhere the corrosion products to the tubing surfaces. The sacrificial tube may then be removed by conventional chemical etching or mechanical methods.

  5. Versatile microbial surface-display for environmental remediation and biofuels production

    SciTech Connect (OSTI)

    Wu, Cindy H.; Mulchandani, Ashok; Chen, wilfred

    2008-02-14

    Surface display is a powerful technique that utilizes natural microbial functional components to express proteins or peptides on the cell exterior. Since the reporting of the first surface-display system in the mid-1980s, a variety of new systems have been reported for yeast, Gram-positive and Gram-negative bacteria. Non-conventional display methods are emerging, eliminating the generation of genetically modified microorganisms. Cells with surface display are used as biocatalysts, biosorbents and biostimulants. Microbial cell-surface display has proven to be extremely important for numerous applications ranging from combinatorial library screening and protein engineering to bioremediation and biofuels production.

  6. Using Business Scenarios to Surface Requirements for COTS Products WenQian Liu

    E-Print Network [OSTI]

    Easterbrook, Steve

    . lymer@ca.ibm.com Steve Easterbrook Dept. of Computer Science University of Toronto sme Science University of Toronto wl@cs.utoronto.ca Sharon Lymer IBM Toronto Software Lab IBM Canada LtdUsing Business Scenarios to Surface Requirements for COTS Products WenQian Liu Dept. of Computer

  7. Stability of AdS black strings

    E-Print Network [OSTI]

    T. Delsate

    2008-08-14

    We review the recent developements in the stability problem and phase diagram for asymptotically locally $AdS$ black strings. First, we quickly review the case of locally flat black string before turning to the case of locally $AdS$ spacetimes.

  8. AdS$_3$ and AdS$_2$ Magnetic Brane Solutions

    E-Print Network [OSTI]

    Ahmed Almuhairi

    2010-11-04

    We investigate AdS$_3$ and AdS$_2$ magnetic brane solutions within the consistent truncation of AdS$_5 \\times S^5$ supergravity. The AdS$_3$ solution extends earlier work by allowing a general embedding of the magnetic $U(1)$ in $SO(6)$. We determine the ratio of strong- and weak-coupling entropies as a function of this embedding. Further, by considering crossed magnetic fields in different $U(1)$'s we are able to construct a solution that runs from AdS$_5$ in the UV to AdS$_2 \\times R^3$ in the IR. We find the notable result that there is a zero temperature entropy at strong coupling but not at weak coupling. We also show that the AdS$_2$ solution and at least some of the AdS$_3$ solutions are stable within the truncation.

  9. Online Effects of Offline Ads Diane Lambert

    E-Print Network [OSTI]

    Cortes, Corinna

    Online Effects of Offline Ads Diane Lambert Google, Inc. 76 Ninth Ave New York, NY 10011 dlambert a methodology for assessing how ad campaigns in offline media such as print, audio and TV affect online in ad appeared suggests heightened interest in the advertised product, as long as there would have been

  10. Prediction of gas-hydrate formation conditions in production and surface facilities 

    E-Print Network [OSTI]

    Ameripour, Sharareh

    2006-10-30

    .2 Phase diagram for natural gas hydrocarbons which form hydrates .............9 Fig. 2.3 Formation of gas hydrate plugs a subsea hydrocarbon pipeline................11 Fig. 2.4 Experimental hydrate equilibrium conditions for the ternary... exploration and production operations. Hydrate clathrates can plug gas gathering systems and transmission pipelines subsea and on the surface. In offshore explorations, the main concern is the multiphase transfer lines from the wellhead...

  11. Production and measurement of engineered surfaces for inertial confinement fusion research

    SciTech Connect (OSTI)

    Day, Robert D [Los Alamos National Laboratory; Hatch, Douglas J [Los Alamos National Laboratory; Rivera, Gerald [Los Alamos National Laboratory

    2011-01-19

    Inertial Confinement Fusion uses the optical energy from a very high power laser to implode spherical capsules that contain a fuel mixture of deuterium and tritium. The capsules are made of either Beryllium, plastic, or glass and range from 0.1 mm to 2 mm in diameter. As a capsule implodes, thereby compressing the fuel to reach nuclear fusion conditions, it achieves temperatures of millions of degrees Centigrade and very high pressures. In this state, the capsule materials act like fluids and often a low density fluidic material will push on a higher density material which can be a very unstable condition depending upon the smoothness of the interface between the two materials. This unstable condition is called a hydrodynamic instabillity which results in the mixing of the two materials. If the mixing occurs between the fuel and a non-fuel material, it can stop the fusion reaction just like adding significant amounts of water to gasoline can stop the operation of an automobile. Another region in the capsule where surface roughness can cause capsule performance degradation is at a joint. For instance, many capsules are made of hemispheres that are joined together. If the joint surfaces are too rough, then there will an effective reduction in density at the joint. This density reduction can cause a non-uniform implosion which will reduce the fusion energy coming out of the capsule.

  12. ARM - PI Product - Surface Albedo/BRDF Parameters (Terra/Aqua MODIS)

    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 ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow, Alaska OutreachCalendar NSAProductsMerged andProductsSCMProductsSurface

  13. Comment on the new AdS universe

    E-Print Network [OSTI]

    Ozgur Sarioglu; Bayram Tekin

    2008-11-25

    We show that Bonnor's new Anti-de Sitter (AdS) universe and its D-dimensional generalization is the previously studied AdS soliton.

  14. Biosurfactant Production by Bacteria in the Phyllosphere: Relieving the Tension of Life on a Surface

    E-Print Network [OSTI]

    Burch, Adrien Yuan

    2011-01-01

    formation and surfactin production. Plant Physiol. 134:307-controls alginate production and tolerance to environmentaled. ), Biosurfactants: production, properties, applications,

  15. PROBLEM LIST FOR THE "NEW TECHNIQUES IN LORENTZ MANIFOLDS" WORKSHOP (1) (Labourie) Mess shows that compact oriented orthochronous 2 + 1 AdS

    E-Print Network [OSTI]

    Scannell, Kevin Patrick

    that compact oriented orthochronous 2 + 1 AdS spacetime with non-empty spacelike boundary S a product S × [0, 1] and embeds in a domain of dependence. Is it possible to construct a singular AdS manifold with more than two constant curvature spacetime. (3) (Schlenker) Let M be a compact AdS cone manifold with m singular curves

  16. Engineering the Surface of Bacillus subtilis to Degrade Lignocellulose for Biofuel Production

    E-Print Network [OSTI]

    Anderson, Timothy David

    2013-01-01

    technologies for bioethanol production from lignocellulose.aqueous ammonia for bioethanol production. Methods Mol Biol

  17. AdS spacetimes and isometric embeddings

    E-Print Network [OSTI]

    Steven Willison

    2013-02-07

    An algebraic global isometric embedding of the nonrotating BTZ black hole is presented. The ambient spacetime is $\\mathbb{M}^{2,3}$, the 3+2 dimensional flat spacetime. We also present the analogous embedding for the Euclidean BTZ spacetime and by performing a kind of double analytic continuation construct a 1-parameter family of embeddings of cosmological AdS spacetime into $\\mathbb{M}^{2,3}$ which coincide asymptotically with the embedded BTZ manifold of the appropriate mass. Finally we note that the family of embeddings of cosmological AdS$_{n}$ into $\\mathbb{M}^{2,n}$ generalises to higher dimensions.

  18. Systematics of Coupling Flows in AdS Backgrounds

    E-Print Network [OSTI]

    Goldberger, Walter D.

    2009-01-01

    can be calculated using the AdS/CFT correspondence bySystematics of Coupling Flows in AdS Backgrounds Walter D.Systematics of Coupling Flows in AdS Backgrounds Walter D.

  19. Instability corners in AdS space

    E-Print Network [OSTI]

    Fotios V. Dimitrakopoulos; Ben Freivogel; Matthew Lippert; I-Sheng Yang

    2014-10-07

    We investigate whether arbitrarily small perturbations in global AdS space are generically unstable and collapse into black holes on the time scale set by gravitational interactions. We argue that current evidence, combined with our analysis, strongly suggests that a set of nonzero measure in the space of initial conditions does not collapse on this time scale. On the other hand, existing results do not provide an equally strong indication whether the unstable solutions also form a set of nonzero measure. We perform an analysis in position space to address this puzzle, and our formalism allows us to directly address the vanishing-amplitude limit. We show that gravitational self-interaction leads to tidal deformations which are equally likely to focus or defocus energy, and we sketch the phase diagram accordingly. We also clarify the connection between gravitational evolution in global AdS and holographic thermalization.

  20. Supersymmetric Asymptotic AdS and Lifshitz Solutions in Einstein-Weyl and Conformal Supergravities

    E-Print Network [OSTI]

    H. Lu; Zhao-Long Wang

    2012-05-22

    We show that there exist supersymmetric Lifshitz vacua in off-shell Einstein-Weyl supergravity, in addition to the BPS AdS_4 vacuum. The Lifshitz exponents are determined by the product of the cosmological constant and the coupling of the Weyl-squared term. We then obtain the equations of the supersymmetric solutions that are asymptotic to the AdS or Lifshitz vacua. We obtain many examples of exact solutions as well as numerical ones. We find examples of extremal AdS black branes whose near-horizon geometry is AdS_2\\times T^2. We also find an extremal Lifshitz black hole with z=-2, whose horizon coincides with the curvature singularity. However the asymptotic Lifshitz solutions are in general smooth wormholes. In conformal supergravity, we find intriguing examples of non-extremal "BPS" AdS and Lifshitz black holes whose local Killing spinor is divergent on the horizon. We show that all the supersymmetric asymptotic AdS and Lifshitz solutions have the vanishing Noether charge associated with some scaling symmetry. We also study the integrability condition of the Killing spinor equation and the supersymmetric invariance of the action. Finally we show that the only spherically-symmetric BPS solution is the AdS vacuum.

  1. Advanced Production Surface Preparation Technology Development for Ultra-High Pressure Diesel Injection

    SciTech Connect (OSTI)

    Grant, Marion B.

    2012-04-30

    In 2007, An Ultra High Injection Pressure (UHIP) fueling method has been demonstrated by Caterpillar Fuel Systems - Product Development, demonstrating ability to deliver U.S. Environment Protection Agency (EPA) Tier 4 Final diesel engine emission performance with greatly reduced emissions handling components on the engine, such as without NOx reduction after-treatment and with only a through-flow 50% effective diesel particulate trap (DPT). They have shown this capability using multiple multi-cylinder engine tests of an Ultra High Pressure Common Rail (UHPCR) fuel system with higher than traditional levels of CEGR and an advanced injector nozzle design. The system delivered better atomization of the fuel, for more complete burn, to greatly reduce diesel particulates, while CEGR or high efficiency NOx reduction after-treatment handles the NOx. With the reduced back pressure of a traditional DPT, and with the more complete fuel burn, the system reduced levels of fuel consumption by 2.4% for similar delivery of torque and horsepower over the best Tier 4 Interim levels of fuel consumption in the diesel power industry. The challenge is to manufacture the components in high-volume production that can withstand the required higher pressure injection. Production processes must be developed to increase the toughness of the injector steel to withstand the UHIP pulsations and generate near perfect form and finish in the sub-millimeter size geometries within the injector. This project resulted in two developments in 2011. The first development was a process and a machine specification by which a high target of compressive residual stress (CRS) can be consistently imparted to key surfaces of the fuel system to increase the toughness of the steel, and a demonstration of the feasibility of further refinement of the process for use in volume production. The second development was the demonstration of the feasibility of a process for imparting near perfect, durable geometry to these same feature surfaces to withstand the pulsating UHIP diesel injection without fatigue failure, through the expected life of the fuel system's components (10,000 hours for the pump and common rail, 5000 hours for the injector). The potential to Caterpillar of this fueling approach and the overall emissions reduction system is the cost savings of the fuel, the cost savings of not requiring a full emissions module and other emissions hardware, and the enabling of the use of biodiesel fuel due to the reduced dependency on after-treatment. A proprietary production CRS generating process was developed to treat the interior of the sac-type injector nozzle tip region (particularly for the sac region). Ninety-five tips passed ultra high pulsed pressure fatigue testing with no failures assignable to treated surfaces or materials. It was determined that the CRS impartation method does not weaken the tip internal seat area. Caterpillar Fuel Systems - Product Development accepts that the CRS method initial production technical readiness level has been established. A method to gage CRS levels in production was not yet accomplished, but it is believed that monitoring process parameters call be used to guarantee quality. A precision profiling process for injector seat and sac regions has been shown to be promising but not yet fully confirmed. It was demonstrated that this precision profiling process can achieve form and geometry to well under an aggressively small micron peak-to-valley and that there are no surface flaws that approach an even tighter micron peak-to-valley tolerance. It is planned to purchase machines to further develop and move the process towards production. The system is targeted towards the high-power diesel electric power generators and high-power diesel marine power generators, with displacement from 20 liters to 80 liters and with power from 800 brake horsepower (BHP) to 3200BHP (0.6 megawatts to 2.4 megawatts). However, with market adoption, this system has the potential to meet EPA exhaust standards for all diesel engines nine liters and up, or 300B

  2. Versatile microbial surface-display for environmental remediation and biofuels production

    E-Print Network [OSTI]

    Hawkes, Daniel S

    2008-01-01

    engineering microbes for biofuels production. Science 315,xenobiotics remediation and biofuels production. TargetP. putida JS444 E. coli Biofuels Production Cellobiose

  3. Engineering the Surface of Bacillus subtilis to Degrade Lignocellulose for Biofuel Production

    E-Print Network [OSTI]

    Anderson, Timothy David

    2013-01-01

    Hydrolysis and Biofuel Production. Industrial & EngineeringDegrade Lignocellulose for Biofuel Production A dissertationLignocellulose for Biofuel Production by Timothy David

  4. Pretreated densified biomass products

    DOE Patents [OSTI]

    Dale, Bruce E; Ritchie, Bryan; Marshall, Derek

    2014-03-18

    A product comprising at least one densified biomass particulate of a given mass having no added binder and comprised of a plurality of lignin-coated plant biomass fibers is provided, wherein the at least one densified biomass particulate has an intrinsic density substantially equivalent to a binder-containing densified biomass particulate of the same given mass and h a substantially smooth, non-flakey outer surface. Methods for using and making the product are also described.

  5. Black hole microstates in AdS

    E-Print Network [OSTI]

    Shaghoulian, Edgar

    2015-01-01

    We extend a recently derived higher-dimensional Cardy formula to include angular momenta, which we use to obtain the Bekensten-Hawking entropy of AdS black branes, compactified rotating branes, and large Schwarzschild/Kerr black holes. This is the natural generalization of Strominger's microscopic derivation of the BTZ black hole entropy to higher dimensions. We propose an extension to include $U(1)$ charge, which agrees with the Bekenstein-Hawking entropy of large Reissner-Nordstrom/Kerr-Newman black holes at high temperature. We extend the results to arbitrary hyperscaling violation exponent (this captures the case of black D$p$-branes as a subclass) and reproduce logarithmic corrections.

  6. Surface runoff from full-scale coal combustion product pavements during accelerated loading

    SciTech Connect (OSTI)

    Cheng, C.M.; Taerakul, P.; Tu, W.; Zand, B.; Butalia, T.; Wolfe, W.; Walker, H.

    2008-08-15

    In this study, the release of metals and metalloids from full-scale portland cement concrete pavements containing coal combustion products (CCPs) was evaluated by laboratory leaching tests and accelerated loading of full-scale pavement sections under well-controlled conditions. An equivalent of 20 years of highway traffic loading was simulated at the OSU/OU Accelerated Pavement Load Facility (APLF). Three types of portland cement concrete driving surface layers were tested, including a control section (i.e., ordinary portland cement (PC) concrete) containing no fly ash and two sections in which fly ash was substituted for a fraction of the cement; i.e., 30% fly ash (FA30) and 50% fly ash (FA50). In general, the concentrations of minor and trace elements were higher in the toxicity characteristic leaching procedure (TCLP) leachates than in the leachates obtained from synthetic precipitation leaching procedure and ASTM leaching procedures. Importantly, none of the leachate concentrations exceeded the TCLP limits or primary drinking water standards. Surface runoff monitoring results showed the highest release rates of inorganic elements from the FA50 concrete pavement, whereas there were little differences in release rates between PC and FA30 concretes. The release of elements generally decreased with increasing pavement loading. Except for Cr, elements were released as particulates (>0.45 {mu} m) rather than dissolved constituents. The incorporation of fly ash in the PC cement concrete pavements examined in this study resulted in little or no deleterious environmental impact from the leaching of inorganic elements over the lifetime of the pavement system.

  7. Hawking radiation for a scalar field conformally coupled to an AdS black hole

    E-Print Network [OSTI]

    P. Valtancoli

    2015-02-05

    The decomposition in normal modes of a scalar field conformally coupled to an AdS black hole leads to a Heun equation with simple coefficients thanks to conformal invariance. By applying the Damour-Ruffini method we can relate the critical exponent of the radial part at the horizon surface to the Hawking radiation of scalar particles.

  8. Semiclassical strings in AdS(3) X S^2

    E-Print Network [OSTI]

    Bogeun Gwak; Bum-Hoon Lee; Kamal L. Panigrahi; Chanyong Park

    2009-01-30

    In this paper, we investigate the semiclassical strings in AdS(3)XS^2, in which the string configuration of AdS(3) is classified to three cases depending on the parameters. Each of these has a different anomalous dimension proportional to logS, S^(1/3) and S, where S is a angular momentum on AdS(3). Further we generalize the dispersion relations for various string configuration on AdS(3)XS^2.

  9. Reactive processing of formaldehyde and acetaldehyde in aqueous aerosol mimics: Surface tension depression and secondary organic products

    E-Print Network [OSTI]

    Li, Zhi; Sareen, Neha; McNeill, V Faye

    2011-01-01

    The reactive uptake of carbonyl-containing volatile organic compounds (cVOCs) by aqueous atmospheric aerosols is a likely source of particulate organic material. The aqueous-phase secondary organic products of some cVOCs are surface-active. Therefore, cVOC uptake can lead to organic film formation at the gas-aerosol interface and changes in aerosol surface tension. We examined the chemical reactions of two abundant cVOCs, formaldehyde and acetaldehyde, in water and aqueous ammonium sulfate (AS) solutions mimicking tropospheric aerosols. Secondary organic products were identified using Aerosol Chemical Ionization Mass Spectrometry (Aerosol-CIMS), and changes in surface tension were monitored using pendant drop tensiometry. Hemiacetal oligomers and aldol condensation products were identified using Aerosol-CIMS. A hemiacetal sulfate ester was tentatively identified in the formaldehyde-AS system. Acetaldehyde depresses surface tension to 65(\\pm2) dyn/cm in pure water and 62(\\pm1) dyn/cm in AS solutions. Surface t...

  10. Z .Surface and Coatings Technology 130 2000 164 172 Production of high-density Ni-bonded tungsten carbide

    E-Print Network [OSTI]

    Ghoniem, Nasr M.

    Z .Surface and Coatings Technology 130 2000 164 172 Production of high-density Ni-bonded tungsten carbide coatings using an axially fed DC-plasmatron S. Sharafata,U , A. Kobayashib , S. Chena , N of high-density Ni WC coatings were produces with uniform distribution of WC particles. The small powder

  11. Double-Trace Deformations and Entanglement Entropy in AdS

    E-Print Network [OSTI]

    Taiki Miyagawa; Noburo Shiba; Tadashi Takayanagi

    2015-11-30

    We compute the bulk entanglement entropy of a massive scalar field in a Poincare AdS with the Dirichlet and Neumann boundary condition when we trace out a half space. Moreover, by taking into account the quantum back reaction to the minimal surface area, we calculate how much the entanglement entropy changes under a double-trace deformation of a holographic CFT. In the AdS3/CFT2 setup, our result agrees with the known result in 2d CFTs. In higher dimensions, our results offer holographic predictions.

  12. QCD Condensates and Holographic Wilson Loops for Asymptotically AdS Spaces

    SciTech Connect (OSTI)

    Quevedo, R. Carcasses; Goity, Jose L.; Trinchero, Roberto C.

    2014-02-01

    The minimization of the Nambu-Goto (NG) action for a surface whose contour defines a circular Wilson loop of radius a placed at a finite value of the coordinate orthogonal to the border is considered. This is done for asymptotically AdS spaces. The condensates of dimension n = 2, 4, 6, 8, and 10 are calculated in terms of the coefficients in the expansion in powers of the radius a of the on-shell subtracted NG action for small a->0. The subtraction employed is such that it presents no conflict with conformal invariance in the AdS case and need not introduce an additional infrared scale for the case of confining geometries. It is shown that the UV value of the gluon condensates is universal in the sense that it only depends on the first coefficients of the difference with the AdS case.

  13. Surface studies of niobium chemically polished under conditions for superconducting radiofrequency cavity production

    SciTech Connect (OSTI)

    Hui Tian; Michael Kelley; Charles Reece

    2005-11-14

    The performance of niobium superconducting radiofrequency accelerator cavities is strongly impacted by the topmost several nanometers of the active (interior) surface, especially by the final surface conditioning treatments. We examined the effect of the most commonly employed treatment, buffered chemical polishing (BCP), on polycrystalline niobium sheet over a range of realistic solution flow rates using electron back scatter diffraction (EBSD), stylus profilometry, atomic force microscopy, laboratory XPS and synchrotron (variable photon energy) XPS, seeking to collect statistically significant data sets. We found that the predominant general surface orientation is (100), but others are also present and at the atomic-level details of surface plane orientation are more complex. The post-etch surface exhibits micron-scale roughness, whose extent does not change with treatment conditions. The outermost surface consists of a few-nm thick layer of niobium pentoxide, whose thickness increases with solution flow rate to a maximum of 1.3 - 1.4 times that resulting from static solution. The standard deviation of the roughness measurements is ?? 30% and that of the surface composition is ?? 5%.

  14. Engineering the Surface of Bacillus subtilis to Degrade Lignocellulose for Biofuel Production

    E-Print Network [OSTI]

    Anderson, Timothy David

    2013-01-01

    and T. K. Ghose. 2003. Bioethanol in India: recent past andZhao, and M. Emptage. 2006. Bioethanol. Current Opinion intechnologies for bioethanol production from lignocellulose.

  15. Method using laser irradiation for the production of atomically clean crystalline silicon and germanium surfaces

    DOE Patents [OSTI]

    Ownby, Gary W. (Knoxville, TN); White, Clark W. (Oak Ridge, TN); Zehner, David M. (Lenoir City, TN)

    1981-01-01

    This invention relates to a new method for removing surface impurities from crystalline silicon or germanium articles, such as off-the-shelf p- or n-type wafers to be doped for use as junction devices. The principal contaminants on such wafers are oxygen and carbon. The new method comprises laser-irradiating the contaminated surface in a non-reactive atmosphere, using one or more of Q-switched laser pulses whose parameters are selected to effect melting of the surface without substantial vaporization thereof. In a typical application, a plurality of pulses is used to convert a surface region of an off-the-shelf silicon wafer to an automatically clean region. This can be accomplished in a system at a pressure below 10.sup.-8 Torr, using Q-switched ruby-laser pulses having an energy density in the range of from about 60 to 190 MW/cm.sup.2.

  16. Fermilab Today - Classified Ad Policy

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

    Fermilab Classified Ad Policy Fermilab Today now requires that people placing classified ads must belong to one of these categories: a. active and retired employees of Fermi...

  17. A detailed surface reaction model for syngas production from butane over Rhodium catalyst

    E-Print Network [OSTI]

    Daraio, Chiara

    online 30 July 2011 Keywords: Butane reforming Surface reaction mechanism Micro solid oxide fuel cell a b solid oxide fuel cells (micro SOFCs) have promising potential to provide an alternative al. [16] reported the optimization of a detailed reaction mechanism for methane combustion

  18. Bacterial Carbon Storage to Value Added Products

    E-Print Network [OSTI]

    Brigham, Christopher J.

    PhaR from Paracoccus denitrificans functions as a repressor or autoregulator of the expression of genes encoding phasin protein (PhaP) and PhaR itself, both of which are components of polyhydroxyalkanoate (PHA) granules ...

  19. ARM - Value-Added Product (VAP) Reports

    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 ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow,ProductstoacessProductsrlprofrlprofmerge1turn DocumentationSuggestion

  20. ARM - Value-Added Product Status Reports

    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 ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow,ProductstoacessProductsrlprofrlprofmerge1turn DocumentationSuggestionStatus

  1. ARM - Value-Added Products - Status

    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 ofkandz-cm11 Comments?govInstrumentsnoaacrnBarrow,ProductstoacessProductsrlprofrlprofmerge1turn DocumentationSuggestionStatus-

  2. Doppler Lidar Wind Value-Added Product

    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 theCovalentLaboratory |Sector Full reportTown2008Donald Raby Donald_ -498

  3. Spectral Flow in AdS(3)/CFT(2)

    E-Print Network [OSTI]

    Gaston Giribet; Ari Pakman; Leonardo Rastelli

    2007-12-19

    We study the spectral flowed sectors of the H3 WZW model in the context of the holographic duality between type IIB string theory in AdS(3)x S^3 x T^4 with NSNS flux and the symmetric product orbifold of T^4. We construct explicitly the physical vertex operators in the flowed sectors that belong to short representations of the superalgebra, thus completing the bulk-to-boundary dictionary for 1/2 BPS states. We perform a partial calculation of the string three-point functions of these operators. A complete calculation would require the three-point couplings of non-extremal flowed operators in the H3 WZW model, which are at present unavailable. In the unflowed sector, perfect agreement has recently been found between the bulk and boundary three-point functions of 1/2 BPS operators. Assuming that this agreement persists in the flowed sectors, we determine certain unknown three-point couplings in the H3 WZW model in terms of three-point couplings of affine descendants in the SU(2) WZW model.

  4. Ab Initio/RRKM Study of the Potential Energy Surface of Triplet Ethylene and Product Branching Ratios of the C(3P) + CH4 Reaction

    E-Print Network [OSTI]

    Nguyen, Minh Tho

    Ab Initio/RRKM Study of the Potential Energy Surface of Triplet Ethylene and Product Branching originating from the collision energy (12.2 kcal/mol), the sole reaction products are C2H3 + H, where 90 potential energy surface for the C(3P) + CH4 reaction have been performed using the CCSD(T)/6-311+G(3df,2p

  5. Molecular dynamics simulations of low-energy ,,25200 eV... argon ion interactions with silicon surfaces: Sputter yields and product

    E-Print Network [OSTI]

    Economou, Demetre J.

    Molecular dynamics simulations of low-energy ,,25­200 eV... argon ion interactions with silicon surfaces: Sputter yields and product formation pathways Nawoyuki A. Kubota and Demetre J. Economoua) Plasma energy ( 200 eV ion interactions with surfaces. In particular, atomic layer etching requires etching

  6. Abstract The Accelerator Driven Systems (ADS) require high power beam (>10 MW) to irradiate the neutron production target. To mitigate the effect of the high power, and high intensity beam on the target we propose to reduce the intensity of the beam by un

    E-Print Network [OSTI]

    McDonald, Kirk

    the neutron production target. To mitigate the effect of the high power, and high intensity beam on the targetAbstract The Accelerator Driven Systems (ADS) require high power beam (>10 MW) to irradiate a High-Power Beam* M. Haj Tahar, F Meot, P. Pile, *N. Tsoupas Brookhaven National Laboratory Upton, NY

  7. Atmospheric inversion of surface carbon flux with consideration of the spatial distribution of US crop production and consumption

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

    Chen, J. M.; Univ. of Toronto, ON; Fung, J. W.; Mo, G.; Deng, F.; West, T. O.

    2015-01-19

    In order to improve quantification of the spatial distribution of carbon sinks and sources in the conterminous US, we conduct a nested global atmospheric inversion with detailed spatial information on crop production and consumption. County-level cropland net primary productivity, harvested biomass, soil carbon change, and human and livestock consumption data over the conterminous US are used for this purpose. Time-dependent Bayesian synthesis inversions are conducted based on CO? observations at 210 stations to infer CO? fluxes globally at monthly time steps with a nested focus on 30 regions in North America. Prior land surface carbon fluxes are first generated usingmore »a biospheric model, and the inversions are constrained using prior fluxes with and without adjustments for crop production and consumption over the 2002–2007 period. After these adjustments, the inverted regional carbon sink in the US Midwest increases from 0.25 ± 0.03 to 0.42 ± 0.13 Pg C yr?¹, whereas the large sink in the US southeast forest region is weakened from 0.41 ± 0.12 to 0.29 ± 0.12 Pg C yr?¹. These adjustments also reduce the inverted sink in the west region from 0.066 ± 0.04 to 0.040 ± 0.02 Pg C yr?¹ because of high crop consumption and respiration by humans and livestock. The general pattern of sink increases in crop production areas and sink decreases (or source increases) in crop consumption areas highlights the importance of considering the lateral carbon transfer in crop products in atmospheric inverse modeling, which provides a reliable atmospheric perspective of the overall carbon balance at the continental scale but is unreliable for separating fluxes from different ecosystems.« less

  8. Atmospheric inversion of surface carbon flux with consideration of the spatial distribution of US crop production and consumption

    SciTech Connect (OSTI)

    Chen, J. M.; Fung, J. W.; Mo, G.; Deng, F.; West, T. O.

    2015-01-19

    In order to improve quantification of the spatial distribution of carbon sinks and sources in the conterminous US, we conduct a nested global atmospheric inversion with detailed spatial information on crop production and consumption. County-level cropland net primary productivity, harvested biomass, soil carbon change, and human and livestock consumption data over the conterminous US are used for this purpose. Time-dependent Bayesian synthesis inversions are conducted based on CO? observations at 210 stations to infer CO? fluxes globally at monthly time steps with a nested focus on 30 regions in North America. Prior land surface carbon fluxes are first generated using a biospheric model, and the inversions are constrained using prior fluxes with and without adjustments for crop production and consumption over the 2002–2007 period. After these adjustments, the inverted regional carbon sink in the US Midwest increases from 0.25 ± 0.03 to 0.42 ± 0.13 Pg C yr?¹, whereas the large sink in the US southeast forest region is weakened from 0.41 ± 0.12 to 0.29 ± 0.12 Pg C yr?¹. These adjustments also reduce the inverted sink in the west region from 0.066 ± 0.04 to 0.040 ± 0.02 Pg C yr?¹ because of high crop consumption and respiration by humans and livestock. The general pattern of sink increases in crop production areas and sink decreases (or source increases) in crop consumption areas highlights the importance of considering the lateral carbon transfer in crop products in atmospheric inverse modeling, which provides a reliable atmospheric perspective of the overall carbon balance at the continental scale but is unreliable for separating fluxes from different ecosystems.

  9. Atmospheric inversion of the surface carbon flux with consideration of the spatial distributions of US crop production and consumption

    SciTech Connect (OSTI)

    Chen, J. M.; Fung, J. W.; Mo, G.; Deng, F.; West, Tristram O.

    2015-01-01

    In order to improve quantification of the spatial distribution of carbon sinks and sources in the conterminous USA, we conduct a nested global atmospheric inversion with consideration of the spatial information of crop production and consumption. Spatially distributed 5 county-level cropland net primary productivity, harvested biomass, soil carbon change, and human and livestock consumption data over the conterminous USA are used for this purpose. Time-dependent Bayesian synthesis inversions are conducted based on CO? observations at 210 stations to infer CO? fluxes globally at monthly time steps with a nested focus on 30 regions in North America. Prior land surface carbon 10 fluxes are first generated using a biospheric model, and the inversions are constrained using prior fluxes with and without adjustments for crop production and consumption over the 2002–2007 period. After these adjustments, the inverted regional carbon sink in the US Midwest increases from 0.25 ± 0.03 Pg C yr?¹ to 0.42 ± 0.13 Pg C yr?¹, whereas the large sink in the US Southeast forest region is weakened from 0.41±0.12 Pg C yr?¹ 15 to 0.29 ±0.12 Pg C yr?¹. These adjustments also reduce the inverted sink in the West region from 0.066 ± 0.04 Pg C yr?¹ to 0.040 ± 0.02 Pg C yr?1 because of high crop consumption and respiration by humans and livestock. The general pattern of sink increase in crop production areas and sink decreases (or source increases) in crop consumption areas highlights the importance of considering the lateral carbon transfer in crop 20 products in atmospheric inverse modeling, which provides an atmospheric perspective of the overall carbon balance of a region.

  10. Atmospheric inversion of surface carbon flux with consideration of the spatial distribution of US crop production and consumption

    SciTech Connect (OSTI)

    Chen, J. M. [Nanjing Univ., Jiangsu (China); Univ. of Toronto, ON (Canada); Fung, J. W. [Univ. of Toronto, ON (Canada); Mo, G. [Univ. of Toronto, ON (Canada); Deng, F. [Univ. of Toronto, ON (Canada); West, T. O. [Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

    2015-01-01

    In order to improve quantification of the spatial distribution of carbon sinks and sources in the conterminous US, we conduct a nested global atmospheric inversion with detailed spatial information on crop production and consumption. County-level cropland net primary productivity, harvested biomass, soil carbon change, and human and livestock consumption data over the conterminous US are used for this purpose. Time-dependent Bayesian synthesis inversions are conducted based on CO? observations at 210 stations to infer CO? fluxes globally at monthly time steps with a nested focus on 30 regions in North America. Prior land surface carbon fluxes are first generated using a biospheric model, and the inversions are constrained using prior fluxes with and without adjustments for crop production and consumption over the 2002–2007 period. After these adjustments, the inverted regional carbon sink in the US Midwest increases from 0.25 ± 0.03 to 0.42 ± 0.13 Pg C yr?¹, whereas the large sink in the US southeast forest region is weakened from 0.41 ± 0.12 to 0.29 ± 0.12 Pg C yr?¹. These adjustments also reduce the inverted sink in the west region from 0.066 ± 0.04 to 0.040 ± 0.02 Pg C yr?¹ because of high crop consumption and respiration by humans and livestock. The general pattern of sink increases in crop production areas and sink decreases (or source increases) in crop consumption areas highlights the importance of considering the lateral carbon transfer in crop products in atmospheric inverse modeling, which provides a reliable atmospheric perspective of the overall carbon balance at the continental scale but is unreliable for separating fluxes from different ecosystems.

  11. Validation of CERES/SARB Data Product Using ARM Surface Flux Observations

    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 AdministrationRobust,Field-effectWorking WithTelecentric viewingValidating extended MHDCERES/SARB Data Product

  12. Logarithmic Operators in AdS_3/CFT_2

    E-Print Network [OSTI]

    Alex Lewis

    1999-11-30

    We discuss the relation between singletons in AdS_3 and logarithmic operators in the CFT on the boundary. In 2 dimensions there can be more logarithmic operators apart from those which correspond to singletons in AdS, because logarithmic operators can occur when the dimensions of primary fields differ by an integer instead of being equal. These operators may be needed to account for the greybody factor for gauge bosons in the bulk.

  13. Central Charge for 2D Gravity on AdS(2) and AdS(2)/CFT(1) Correspondence

    E-Print Network [OSTI]

    Mohsen Alishahiha; Farhad Ardalan

    2008-08-19

    We study 2D Maxwell-dilaton gravity on AdS(2). We distinguish two distinctive cases depending on whether the AdS(2) solution can be lifted to an AdS(3) geometry. In both cases, in order to get a consistent boundary condition we need to work with a twisted energy momentum tensor which has non-zero central charge. With this central charge and the explicit form of the twisted Virasoro generators we compute the entropy of the system using the Cardy formula. The entropy is found to be the same as that obtained from gravity calculations for a specific value of the level of the U(1) current. The agreement is an indication of $AdS(2)/CFT(1) correspondence.

  14. AdS Field Theory from Conformal Field Theory

    E-Print Network [OSTI]

    A. Liam Fitzpatrick; Jared Kaplan

    2012-08-01

    We provide necessary and sufficient conditions for a Conformal Field Theory to have a description in terms of a perturbative Effective Field Theory in AdS. The first two conditions are well-known: the existence of a perturbative `1/N' expansion and an approximate Fock space of states generated by a finite number of low-dimension operators. We add a third condition, that the Mellin amplitudes of the CFT correlators must be well-approximated by functions that are bounded by a polynomial at infinity in Mellin space, or in other words, that the Mellin amplitudes have an effective theory-type expansion. We explain the relationship between our conditions and unitarity, and provide an analogy with scattering amplitudes that becomes exact in the flat space limit of AdS. The analysis also yields a simple connection between conformal blocks and AdS diagrams, providing a new calculational tool very much in the spirit of the S-Matrix program. We also begin to explore the potential pathologies associated with higher spin fields in AdS by generalizing Weinberg's soft theorems to AdS/CFT. The AdS analog of Weinberg's argument constrains the interactions of conserved currents in CFTs, but there are potential loopholes that are unavailable to theories of massless higher spin particles in flat spacetime.

  15. Ergonomics - Using Ergonomics to Enhance Safe Production at a Surface Coal Mine - A Case Study with Powder Crews

    SciTech Connect (OSTI)

    Torma-Krajewski, J.; Wiehagen, W.; Etcheverry, A.; Turin, F.; Unger, R.

    2009-07-01

    Job tasks that involve exposure to work-related musculoskeletal disorder (WMSD) risk factors may impact both the risk of injury and production downtime. Common WMSD risks factors associated with mining tasks include forceful exertions, awkward postures, repetitive motion, jolting and jarring, forceful gripping, contact stress, and whole body and segmental vibration. Mining environments that expose workers to temperature/humidity extremes, windy conditions, and slippery and uneven walking surfaces also contribute to injury risk. National Institute for Occupational Safety and Health (NIOSH) researchers worked with powder crew members from the Bridger Coal Company to identify and rank routine work tasks based on perceived exposure to WMSD risk factors. This article presents the process followed to identify tasks that workers believed involved the greatest exposure to risk factors and discusses risk reduction strategies. Specifically, the proposed prill truck design changes addressed cab ingress/egress, loading blast holes, and access to the upper deck of the prill truck.

  16. Surface Environmental Surveillance Project: Locations Manual Volume 1 – Air and Water Volume 2 – Farm Products, Soil & Vegetation, and Wildlife

    SciTech Connect (OSTI)

    Fritz, Brad G.; Patton, Gregory W.; Stegen, Amanda; Poston, Ted M.

    2009-01-01

    This report describes all environmental monitoring locations associated with the Surface Environmental Surveillance Project. Environmental surveillance of the Hanford site and surrounding areas is conducted by the Pacific Northwest National Laboratory (PNNL) for the U.S. Department of Energy (DOE). Sampling is conducted to evaluate levels of radioactive and nonradioactive pollutants in the Hanford environs, as required in DOE Order 450.1, Environmental Protection Program, and DOE Order 5400.5, Radiation Protection of the Public and the Environment. The environmental surveillance sampling design is described in the Hanford Site Environmental Monitoring Plan, United States Department of Energy, Richland Operation Office (DOE/RL-91-50). This document contains the locations of sites used to collect samples for the Surface Environmental Surveillance Project (SESP). Each section includes directions, maps, and pictures of the locations. A general knowledge of roads and highways on and around the Hanford Site is necessary to successfully use this manual. Supplemental information (Maps, Gazetteer, etc.) may be necessary if user is unfamiliar with local routes. The SESP is a multimedia environmental surveillance effort to measure the concentrations of radionuclides and chemicals in environmental media to demonstrate compliance with applicable environmental quality standards and public exposure limits, and assessing environmental impacts. Project personnel annually collect selected samples of ambient air, surface water, agricultural products, fish, wildlife, and sediments. Soil and vegetation samples are collected approximately every 5 years. Analytical capabilities include the measurement of radionuclides at very low environmental concentrations and, in selected media, nonradiological chemicals including metals, anions, volatile organic compounds, and total organic carbon.

  17. Large rotating AdS black holes from fluid mechanics

    E-Print Network [OSTI]

    Sayantani Bhattacharyya; Subhaneil Lahiri; R. Loganayagam; Shiraz Minwalla

    2008-07-25

    We use the AdS/CFT correspondence to argue that large rotating black holes in global AdS(D) spaces are dual to stationary solutions of the relativistic Navier-Stokes equations on S**(D-2). Reading off the equation of state of this fluid from the thermodynamics of non-rotating black holes, we proceed to construct the nonlinear spinning solutions of fluid mechanics that are dual to rotating black holes. In all known examples, the thermodynamics and the local stress tensor of our solutions are in precise agreement with the thermodynamics and boundary stress tensor of the spinning black holes. Our fluid dynamical description applies to large non-extremal black holes as well as a class of large non-supersymmetric extremal black holes, but is never valid for supersymmetric black holes. Our results yield predictions for the thermodynamics of all large black holes in all theories of gravity on AdS spaces, for example, string theory on AdS(5) x S**5 and M theory on AdS(4) x S**7 and AdS(7) x S**4.

  18. Variations of 14-C around AD 775 and AD 1795 - due to solar activity

    E-Print Network [OSTI]

    Neuhaeuser, Ralph

    2015-01-01

    The motivation for our study is the disputed cause for the strong variation of 14-C around AD 775. Our method is to compare the 14-C variation around AD 775 with other periods of strong variability. Our results are: (a) We see three periods, where 14-C varied over 200 yr in a special way showing a certain pattern of strong secular variation: after a Grand Minimum with strongly increasing 14-C, there is a series of strong short-term drop(s), rise(s), and again drop(s) within 60 yr, ending up to 200 yr after the start of the Grand Minimum. These three periods include the strong rises around BC 671, AD 775, and AD 1795. (b) We show with several solar activity proxies (radioisotopes, sunspots, and aurorae) for the AD 770s and 1790s that such intense rapid 14-C increases can be explained by strong rapid decreases in solar activity and, hence, wind, so that the decrease in solar modulation potential leads to an increase in radioisotope production. (c) The strong rises around AD 775 and 1795 are due to three effects...

  19. Ad Hoc Curriculum Implementation Working Group Ad Hoc Working Group

    E-Print Network [OSTI]

    Brown, Sally

    Ad Hoc Curriculum Implementation Working Group MINUTES Ad Hoc Working Group 4 December 2002 Friedman on her visit next week. ONE CURRICULUM OR TWO? Information presented by Trudeau shows that PSE and other programs cannot be merged into a single curriculum. The Faculty Senate website states

  20. ARM Evaluation Product : Droplet Number Concentration Value-Added Product

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

    Riihimaki, Laura

    2014-05-15

    Cloud droplet number concentration is an important factor in understanding aerosol-cloud interactions. As aerosol concentration increases, it is expected that droplet number concentration, Nd, will increase and droplet size decrease, for a given liquid water path (Twomey 1977), which will greatly affect cloud albedo as smaller droplets reflect more shortwave radiation. However, the magnitude and variability of these processes under different environmental conditions is still uncertain. McComiskey et al. (2009) have implemented a method, based on Boers and Mitchell (1994), for calculating Nd from ground-based remote sensing measurements of optical depth and liquid water path. They show that the magnitude of the aerosol-cloud interactions (ACI) varies with a range of factors, including the relative value of the cloud liquid water path (LWP), the aerosol size distribution, and the cloud updraft velocity. Estimates of Nd under a range of cloud types and conditions and at a variety of sites are needed to further quantify the impacts of aerosol cloud interactions.

  1. ARM Evaluation Product : Droplet Number Concentration Value-Added Product

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

    Riihimaki, Laura

    Cloud droplet number concentration is an important factor in understanding aerosol-cloud interactions. As aerosol concentration increases, it is expected that droplet number concentration, Nd, will increase and droplet size decrease, for a given liquid water path (Twomey 1977), which will greatly affect cloud albedo as smaller droplets reflect more shortwave radiation. However, the magnitude and variability of these processes under different environmental conditions is still uncertain. McComiskey et al. (2009) have implemented a method, based on Boers and Mitchell (1994), for calculating Nd from ground-based remote sensing measurements of optical depth and liquid water path. They show that the magnitude of the aerosol-cloud interactions (ACI) varies with a range of factors, including the relative value of the cloud liquid water path (LWP), the aerosol size distribution, and the cloud updraft velocity. Estimates of Nd under a range of cloud types and conditions and at a variety of sites are needed to further quantify the impacts of aerosol cloud interactions.

  2. Ultraviolet asymptotics for quasiperiodic AdS_4 perturbations

    E-Print Network [OSTI]

    Ben Craps; Oleg Evnin; Puttarak Jai-akson; Joris Vanhoof

    2015-10-29

    Spherically symmetric perturbations in AdS-scalar field systems of small amplitude epsilon approximately periodic on time scales of order 1/epsilon^2 (in the sense that no significant transfer of energy between the AdS normal modes occurs) have played an important role in considerations of AdS stability. They are seen as anchors of stability islands where collapse of small perturbations to black holes does not occur. (This collapse, if it happens, typically develops on time scales of the order 1/epsilon^2.) We construct an analytic treatment of the frequency spectra of such quasiperiodic perturbations, paying special attention to the large frequency asymptotics. For the case of a self-interacting phi^4 scalar field in a non-dynamical AdS background, we arrive at a fairly complete analytic picture involving quasiperiodic spectra with an exponential suppression modulated by a power law at large mode numbers. For the case of dynamical gravity, the structure of the large frequency asymptotics is more complicated. We give analytic explanations for the general qualitative features of quasiperiodic solutions localized around a single mode, in close parallel to our discussion of the probe scalar field, and find numerical evidence for logarithmic modulations in the gravitational quasiperiodic spectra existing on top of the formulas previously reported in the literature.

  3. Ultraviolet asymptotics for quasiperiodic AdS_4 perturbations

    E-Print Network [OSTI]

    Ben Craps; Oleg Evnin; Puttarak Jai-akson; Joris Vanhoof

    2015-09-04

    Spherically symmetric perturbations in AdS-scalar field systems of small amplitude epsilon approximately periodic on time scales of order 1/epsilon^2 (in the sense that no significant transfer of energy between the AdS normal modes occurs) have played an important role in considerations of AdS stability. They are seen as anchors of stability islands where collapse of small perturbations to black holes does not occur. (This collapse, if it happens, typically develops on time scales of the order 1/epsilon^2.) We construct an analytic treatment of the frequency spectra of such quasiperiodic perturbations, paying special attention to the large frequency asymptotics. For the case of a self-interacting phi^4 scalar field in a non-dynamical AdS background, we arrive at a fairly complete analytic picture involving quasiperiodic spectra with an exponential suppression modulated by a power law at large mode numbers. For the case of dynamical gravity, the structure of the large frequency asymptotics is more complicated. We give analytic explanations for the general qualitative features of quasiperiodic solutions localized around a single mode, in close parallel to our discussion of the probe scalar field, and find numerical evidence for logarithmic modulations in the gravitational quasiperiodic spectra existing on top of the formulas previously reported in the literature.

  4. Ultraviolet asymptotics for quasiperiodic AdS_4 perturbations

    E-Print Network [OSTI]

    Craps, Ben; Jai-akson, Puttarak; Vanhoof, Joris

    2015-01-01

    Spherically symmetric perturbations in AdS-scalar field systems of small amplitude epsilon approximately periodic on time scales of order 1/epsilon^2 (in the sense that no significant transfer of energy between the AdS normal modes occurs) have played an important role in considerations of AdS stability. They are seen as anchors of stability islands where collapse of small perturbations to black holes does not occur. (This collapse, if it happens, typically develops on time scales of the order 1/epsilon^2.) We construct an analytic treatment of the frequency spectra of such quasiperiodic perturbations, paying special attention to the large frequency asymptotics. For the case of a self-interacting phi^4 scalar field in a non-dynamical AdS background, we arrive at a fairly complete analytic picture involving quasiperiodic spectra with an exponential suppression modulated by a power law at large mode numbers. For the case of dynamical gravity, the structure of the large frequency asymptotics is more complicated....

  5. Speech Recognition for Vocalized and Subvocal Modes of Production using Surface EMG Signals from the Neck and Face

    E-Print Network [OSTI]

    De Luca, Carlo J.

    recognition accuracy for individual words using eleven surface electromyographic (sEMG) recording locations alternative is to acquire speech information from surface electromyographic (sEMG) signals recorded from

  6. Production

    Broader source: Energy.gov [DOE]

    Algae production R&D focuses on exploring resource use and availability, algal biomass development and improvements, characterizing algal biomass components, and the ecology and engineering of cultivation systems.

  7. Perturbative entanglement thermodynamics for AdS spacetime: Renormalization

    E-Print Network [OSTI]

    Mishra, Rohit

    2015-01-01

    We study the effect of charged excitations in the AdS spacetime on the first law of entanglement thermodynamics. It is found that `boosted' AdS black holes give rise to a more general form of first law which includes chemical potential and charge density. To obtain this result we have to resort to a second order perturbative calculation of entanglement entropy for small size subsystems. At first order the form of entanglement law remains unchanged even in the presence of charged excitations. But the thermodynamic quantities have to be appropriately `renormalized' at the second order due to the corrections. We work in the perturbative regime where $T_{thermal}\\ll T_E$.

  8. Perturbative entanglement thermodynamics for AdS spacetime: Renormalization

    E-Print Network [OSTI]

    Rohit Mishra; Harvendra Singh

    2015-07-14

    We study the effect of charged excitations in the AdS spacetime on the first law of entanglement thermodynamics. It is found that `boosted' AdS black holes give rise to a more general form of first law which includes chemical potential and charge density. To obtain this result we have to resort to a second order perturbative calculation of entanglement entropy for small size subsystems. At first order the form of entanglement law remains unchanged even in the presence of charged excitations. But the thermodynamic quantities have to be appropriately `renormalized' at the second order due to the corrections. We work in the perturbative regime where $T_{thermal}\\ll T_E$.

  9. Spiky Strings on AdS(4) X CP**3

    E-Print Network [OSTI]

    Bum-Hoon Lee; Kamal L. Panigrahi; Chanyong Park

    2008-11-07

    We study a giant magnon and a spike solution for the string rotating on AdS(4) X CP**3 geometry. We consider rigid rotating fundamental string in the SU(2) X SU(2) sector inside the CP**3 and find out the general form of all the conserved charges. We find out the dispersion relation corresponding to both the known giant magnon and the new spike solutions. We further study the finite size correction in both cases.

  10. Fermilab Today | Classifieds Ad Form

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

    will be posted on the Internet and can lead to responses from outside the lab. Some ads posted in Fermilab Today in the past have received responses from scammers who, for...

  11. A Comparison of Atmospheric Reanalysis Surface Products over the Ocean and Implications for Uncertainties in Air–Sea Boundary Forcing

    E-Print Network [OSTI]

    Chaudhuri, Ayan H.

    This paper investigates the uncertainties related to atmospheric fields from reanalysis products used in forcing ocean models. Four reanalysis products, namely from 1) the interim ECMWF Re-Analysis (ERA-Interim), 2) version ...

  12. Retiree AD&D Insurance

    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 ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) byMultiday ProductionDesigningResources Thomas Jefferson JesupAD&D

  13. Thermal Fluctuations in a Charged AdS Black Hole

    E-Print Network [OSTI]

    Pourhassan, B

    2015-01-01

    In this paper, we will analyze the effects of thermal fluctuations on a charged AdS black hole. This will be done by analyzing the corrections to black hole thermodynamics due to these thermal fluctuations. We will demonstrate that the entropy of this black hole get corrected by logarithmic term. We will also calculate other corrections to other important thermodynamic quantities for this black hole. Finally, we will use the corrected value of the specific heat to analyze the phase transition in this system.

  14. Thermal Fluctuations in a Charged AdS Black Hole

    E-Print Network [OSTI]

    B. Pourhassan; Mir Faizal

    2015-08-12

    In this paper, we will analyze the effects of thermal fluctuations on a charged AdS black hole. This will be done by analyzing the corrections to black hole thermodynamics due to these thermal fluctuations. We will demonstrate that the entropy of this black hole get corrected by logarithmic term. We will also calculate other corrections to other important thermodynamic quantities for this black hole. Finally, we will use the corrected value of the specific heat to analyze the phase transition in this system.

  15. Tunneling during Quantum Collapse in AdS Spacetime

    E-Print Network [OSTI]

    Cenalo Vaz; Kinjalk Lochan

    2013-01-30

    We extend previous results on the reflection and transmission of self-gravitating dust shells across the apparent horizon during quantum dust collapse to non-marginally-bound dust collapse in arbitrary dimensions with a negative cosmological constant. We show that the Hawking temperature is independent of the energy function and that the wave functional describing the collapse is well behaved at the Hawking-Page transition point. Thermal radiation from the apparent horizon appears as a generic result of non-marginal collapse in AdS space-time owing to the singular structure of the Hamiltonian constraint at the apparent horizon.

  16. Entanglement Entropy and Duality in AdS(4)

    E-Print Network [OSTI]

    Ioannis Bakas; Georgios Pastras

    2015-04-30

    Small variations of the entanglement entropy \\delta S and the expectation value of the modular Hamiltonian \\delta E are computed holographically for circular entangling curves in the boundary of AdS(4), using gravitational perturbations with general boundary conditions in spherical coordinates. Agreement with the first law of thermodynamics, \\delta S = \\delta E, requires that the line element of the entangling curve remains constant. In this context, we also find a manifestation of electric-magnetic duality for the entanglement entropy and the corresponding modular Hamiltonian, following from the holographic energy-momentum/Cotton tensor duality.

  17. Enhancing the science return of Mars missions via sample preparation, robotic surface exploration and in orbit fuel production

    E-Print Network [OSTI]

    Lamamy, Julien-Alexandre, 1978-

    2004-01-01

    The future of Mars exploration is challenging from multiple points of view. To enhance their science return, future surface probes will most likely be equipped with complex Sample Preparation And Transfer (SPAT) facilities. ...

  18. Impact of Solvent on Photocatalytic Mechanisms: Reactions of Photodesorption Products with Ice Overlayers on the TiO2(110) Surface

    SciTech Connect (OSTI)

    Shen, Mingmin; Henderson, Michael A.

    2011-04-07

    The effects of water and methanol ice overlayers on the photodecomposition of acetone on rutile TiO2(110) were evaluated in ultrahigh vacuum (UHV) using photon stimulated desorption (PSD) and temperature programmed desorption (TPD). In the absence of ice overlayers, acetone photodecomposed on TiO2(110) at 95 K by ejection of a methyl radical into the gas phase and formation of acetate on the surface. With ice overlayers, the methyl radicals are trapped at the interface between TiO2(110) and the ice. When water ice was present, these trapped methyl radicals reacted either with each other to form ethane or with other molecules in the ice (e.g., water or displaced acetone) to form methane (CH4), ethane (CH3CH3) and other products (e.g., methanol), with all of these products trapped in the ice. The new products were free to revisit the surface or depart during desorption of the ice. When methanol ice was present, methane formation came about only from reaction of trapped methyl radicals with the methanol ice. Methane and ethane slowly leaked through methanol ice overlayers into vacuum at 95 K, but not through water ice overlayers. Different degrees of site competition between water and acetone, and between methanol and acetone led to different hydrogen abstraction pathways in the two ices. These results provide new insights into product formation routes and solution-phase radical formation mechanisms that are important in heterogeneous photocatalysis.

  19. Characterization and Surface Treatment of Materials Used in MADEAL S.A. Industry Productive Process of Rims by Plasma Assisted Repetitive Pulsed Arcs Technique

    SciTech Connect (OSTI)

    Jimenez, H.; Salazar, V. H.; Devia, A.; Jaramillo, S.; Velez, G.

    2006-12-04

    A study of materials used in the molds production to aluminium rims manufacture in the MADEAL S.A. factory was carried out for apply a plasma assisted surface treatment consists in growing TiAlN hard coatings that it protects this molds in the productive process. This coating resists high oxidation temperatures, of the other of 800 deg. C, high hardness (2800 Vickers) and low friction coefficient. A plasma assisted repetitive pulsed arcs mono-evaporator system was used in the grow of the TiAlN coatings, the TiAlN target is a sinterized 50% Ti and 50% Al, in the substrate they were used two types of steel that compose the molds injection pieces for the rims production. These materials were subjected to linear and fluctuating thermal changes in the Bruker axs X-Ray diffractometer temperature chamber, what simulated the molds thermal variation in the rims production process and they were compared with TiAlN coatings subjected to same thermal changes. The Materials characterization, before and later of thermal process, was carried out using XRD, SPM and EDS techniques, to analyze the crystallographic, topographic and chemical surface structure behaviours.

  20. Topics in 3D N=2 AdS supergravity in superspace

    E-Print Network [OSTI]

    Gabriele Tartaglino-Mazzucchelli

    2012-02-01

    We review some recent results on the construction in superspace of 3D N=2 AdS supergravities and on the formulation of rigid supersymmetric theories in (1,1) and (2,0) AdS superspaces.

  1. Quasinormal modes and holographic correlators in a crunching AdS geometry

    E-Print Network [OSTI]

    Kumar, S Prem

    2015-01-01

    We calculate frequency space holographic correlators in an asymptotically AdS crunching background, dual to a relevant deformation of the M2-brane CFT placed in de Sitter spacetime. For massless bulk scalars, exploiting the connection to a solvable supersymmetric quantum mechanical problem, we obtain the exact frequency space correlator for the dual operator in the deformed CFT. Controlling the shape of the crunching surface in the Penrose diagram by smoothly dialling the deformation from zero to infinity, we observe that in the large deformation limit the Penrose diagram becomes a `square', and the exact holographic correlators display striking similarities to their counterparts in the BTZ black hole and its higher dimensional generalisations. We numerically determine quasinormal poles for relevant and irrelevant operators, and find an intricate pattern of these in the complex frequency plane. In the case of relevant operators, the deformation parameter has an infinite sequence of critical values, each one c...

  2. Scattering States in AdS/CFT

    E-Print Network [OSTI]

    A. Liam Fitzpatrick; Jared Kaplan

    2011-04-13

    We show that suitably regulated multi-trace primary states in large N CFTs behave like `in' and `out' scattering states in the flat-space limit of AdS. Their transition matrix elements approach the exact scattering amplitudes for the bulk theory, providing a natural CFT definition of the flat space S-Matrix. We study corrections resulting from the AdS curvature and particle propagation far from the center of AdS, and show that AdS simply provides an IR regulator that disappears in the flat space limit.

  3. Strings on AdS Wormholes and Nonsingular Black Holes

    E-Print Network [OSTI]

    H. Lu; Justin F. Vazquez-Poritz; Zhibai Zhang

    2014-10-22

    Certain AdS black holes in the STU model can be conformally scaled to wormhole and black hole solutions of an f(R) type theory which have two asymptotically AdS regions and are completely free of curvature singularities. While there is a delta-function source for the dilaton, classical string probes are not sensitive to this singularity. If the AdS/CFT correspondence can be applied in this context, then the wormhole background describes a phase in which two copies of a conformal field theory interact with each other, whereas the nonsingular black hole describes entangled states. By studying the behavior of open strings on these backgrounds, we extract a number of features of the quarks and anti-quarks that live in the field theories. In the interacting phase, we find that there is a maximum speed with which the quarks can move without losing energy, beyond which energy is transferred from a quark in one field theory to a quark in the other. We also compute the rate at which moving quarks within entangled states lose energy to the two surrounding plasmas. While a quark-antiquark pair within a single field theory exhibits Coulomb interaction for small separation, a quark in one field theory exhibits spring-like confinement with an anti-quark in the other field theory. For the entangled states, we study how the quark-antiquark screening length depends on temperature and chemical potential. In the interacting phase of the two field theories, a quadruplet made up of one quark-antiquark pair in each field theory can undergo transitions involving how the quarks and antiquarks are paired in terms of the screening.

  4. AdHeat: An Influence-based Diffusion Model for Propagating Hints to Match Ads

    E-Print Network [OSTI]

    Cortes, Corinna

    AdHeat: An Influence-based Diffusion Model for Propagating Hints to Match Ads Hongji Bao Google edchang@google.com ABSTRACT In this paper, we present AdHeat, a social ad model con- sidering user influence in addition to relevance for match- ing ads. Traditionally, ad placement employs the relevance

  5. Thermodynamics of Charged Lovelock - AdS Black Holes

    E-Print Network [OSTI]

    Prasobh C. B.; Jishnu Suresh; V. C. Kuriakose

    2015-10-16

    We investigate the thermodynamic behavior of maximally symmetric charged, asymptotically AdS black hole solutions of Lovelock gravity. We explore the thermodynamic stability of such solutions by the ordinary method of calculating the specific heat of the black holes and investigating its divergences which signal second order phase transitions between black hole states. We then utilize the methods of thermodynamic geometry of black hole spacetimes in order to explain the origin of these points of divergence. We calculate the curvature scalar corresponding to a Legendre-invariant thermodynamic metric of these spacetimes and find that the divergences in the black hole specific heat correspond to singularities in the thermodynamic phase space. We also calculate the area spectrum for large black holes in the model by applying the Bohr-Sommerfeld quantization to the adiabatic invariant calculated for the spacetime.

  6. AdS Bubbles, E$p$-branes and Entanglement

    E-Print Network [OSTI]

    Harvendra Singh

    2014-10-15

    The AdS-bubble solutions interestingly mimic Schr\\"odinger-like geometries when expressed in light-cone coordinates. These D$p$ bubble vacuas exhibit asymmetric scaling property with a negative dynamical exponent of time $a0$ in type II* super-strings. We obtain an expression for the entanglement entropy for `bubble E3-branes'. It is argued that the entropy from E3-bubbles has to be the lowest.

  7. Islands of stability and recurrence times in AdS

    E-Print Network [OSTI]

    Stephen R. Green; Antoine Maillard; Luis Lehner; Steven L. Liebling

    2015-07-29

    We study the stability of anti-de Sitter (AdS) spacetime to spherically symmetric perturbations of a real scalar field in general relativity. Further, we work within the context of the "two time framework" (TTF) approximation, which describes the leading nonlinear effects for small amplitude perturbations, and is therefore suitable for studying the weakly turbulent instability of AdS---including both collapsing and non-collapsing solutions. We have previously identified a class of quasi-periodic (QP) solutions to the TTF equations, and in this work we analyze their stability. We show that there exist several families of QP solutions that are stable to linear order, and we argue that these solutions represent islands of stability in TTF. We extract the eigenmodes of small oscillations about QP solutions, and we use them to predict approximate recurrence times for generic non-collapsing initial data in the full (non-TTF) system. Alternatively, when sufficient energy is driven to high-frequency modes, as occurs for initial data far from a QP solution, the TTF description breaks down as an approximation to the full system. Depending on the higher order dynamics of the full system, this often signals an imminent collapse to a black hole.

  8. Islands of stability and recurrence times in AdS

    E-Print Network [OSTI]

    Stephen R. Green; Antoine Maillard; Luis Lehner; Steven L. Liebling

    2015-08-27

    We study the stability of anti-de Sitter (AdS) spacetime to spherically symmetric perturbations of a real scalar field in general relativity. Further, we work within the context of the "two time framework" (TTF) approximation, which describes the leading nonlinear effects for small amplitude perturbations, and is therefore suitable for studying the weakly turbulent instability of AdS---including both collapsing and non-collapsing solutions. We have previously identified a class of quasi-periodic (QP) solutions to the TTF equations, and in this work we analyze their stability. We show that there exist several families of QP solutions that are stable to linear order, and we argue that these solutions represent islands of stability in TTF. We extract the eigenmodes of small oscillations about QP solutions, and we use them to predict approximate recurrence times for generic non-collapsing initial data in the full (non-TTF) system. Alternatively, when sufficient energy is driven to high-frequency modes, as occurs for initial data far from a QP solution, the TTF description breaks down as an approximation to the full system. Depending on the higher order dynamics of the full system, this often signals an imminent collapse to a black hole.

  9. Islands of stability and recurrence times in AdS

    E-Print Network [OSTI]

    Green, Stephen R; Lehner, Luis; Liebling, Steven L

    2015-01-01

    We study the stability of anti-de Sitter (AdS) spacetime to spherically symmetric perturbations of a real scalar field in general relativity. Further, we work within the context of the "two time framework" (TTF) approximation, which describes the leading nonlinear effects for small amplitude perturbations, and is therefore suitable for studying the weakly turbulent instability of AdS---including both collapsing and non-collapsing solutions. We have previously identified a class of quasi-periodic (QP) solutions to the TTF equations, and in this work we analyze their stability. We show that there exist several families of QP solutions that are stable to linear order, and we argue that these solutions represent islands of stability in TTF. We extract the eigenmodes of small oscillations about QP solutions, and we use them to predict approximate recurrence times for generic non-collapsing initial data in the full (non-TTF) system. Alternatively, when sufficient energy is driven to high-frequency modes, as occurs ...

  10. Magnetic transport apparatus for the production of ultracold atomic gases in the vicinity of a dielectric surface

    E-Print Network [OSTI]

    Haendel, S; Wiles, T P; Hopkins, S A; Cornish, S L

    2011-01-01

    We present an apparatus designed for studies of atom-surface interactions using quantum degenerate gases of $^{85}$Rb and $^{87}$Rb in the vicinity of a room temperature dielectric surface. The surface to be investigated is a super-polished face of a glass Dove prism mounted in a glass cell under ultra-high vacuum (UHV). To maintain excellent optical access to the region surrounding the surface magnetic transport is used to deliver ultracold atoms from a separate vacuum chamber housing the magneto-optical trap (MOT). We present a detailed description of the vacuum apparatus highlighting the novel design features; a low profile MOT chamber and the inclusion of an obstacle in the transport path. We report the characterization and optimization of the magnetic transport around the obstacle, achieving transport efficiencies of 70% with negligible heating. Finally we demonstrate the loading of a hybrid optical-magnetic trap with $^{87}$Rb and the creation of Bose-Einstein condensates via forced evaporative cooling ...

  11. POSSIBLE CHROMOSPHERIC ACTIVITY CYCLES IN AD LEO

    SciTech Connect (OSTI)

    Buccino, Andrea P.; Petrucci, Romina; Mauas, Pablo J. D.; Jofré, Emiliano

    2014-01-20

    AD Leo (GJ 388) is an active dM3 flare star that has been extensively observed both in the quiescent and flaring states. Since this active star is near the fully convective boundary, studying its long-term chromospheric activity in detail could be an appreciable contribution to dynamo theory. Here, using the Lomb-Scargle periodogram, we analyze the Ca II K line-core fluxes derived from CASLEO spectra obtained between 2001 and 2013 and the V magnitude from the ASAS database between 2004 and 2010. From both of these totally independent time series, we obtain a possible activity cycle with a period of approximately seven years and a less significant shorter cycle of approximately two years. A tentative interpretation is that a dynamo operating near the surface could be generating the longer cycle, while a second dynamo operating in the deep convection zone could be responsible for the shorter one. Based on the long duration of our observing program at CASLEO and the fact that we observe different spectral features simultaneously, we also analyze the relation between simultaneous measurements of the Na I index (R{sub D}{sup ?}), H?, and Ca II K fluxes at different activity levels of AD Leo, including flares.

  12. The AdS Graviton/Pomeron Description of Deep Inelastic Scattering at Small x

    E-Print Network [OSTI]

    Richard C. Brower; Marko Djuric; Ina Sarcevic; Chung-I Tan

    2011-06-28

    In the holographic or AdS/CFT dual to QCD, the Pomeron is identified with a Reggeized Graviton in $AdS_5$. We emphasize the importance of confinement, which in this context corresponds to a deformation of $AdS_5$ geometry in the IR. The holographic Pomeron provides a very good fit to the combined data from HERA for Deep Inelastic Scattering at small $x$, lending new confidence to this AdS dual approach to high energy diffractive scattering.

  13. Entropy of near-extremal black holes in AdS5

    E-Print Network [OSTI]

    Balasubramanian, Vijay

    2008-01-01

    is a family of asymptotically AdS 5 ×S 5 black holes chargedCvetic et al. , “Embedding AdS black holes in ten and elevenA toy model for the AdS/CFT correspondence,” JHEP 0407,

  14. Determining an asymptotically AdS Einstein spacetime from data on its conformal boundary

    E-Print Network [OSTI]

    Enciso, Alberto

    Determining an asymptotically AdS Einstein spacetime from data on its conformal boundary Alberto of the AdS/CFT correspondence in string theory is the holographic prescription problem for Einstein metrics and to discuss its physical implications. PACS numbers: 04.20.Ex, 04.20.Ha, 11.25.Tq Keywords: AdS metrics

  15. Method of inducing surface ensembles on a metal catalyst

    DOE Patents [OSTI]

    Miller, Steven S. (Morgantown, WV)

    1989-01-01

    A method of inducing surface ensembles on a transition metal catalyst used in the conversion of a reactant gas or gas mixture, such as carbon monoxide and hydrogen into hydrocarbons (the Fischer-Tropsch reaction) is disclosed which comprises adding a Lewis base to the syngas (CO+H.sub.2) mixture before reaction takes place. The formation of surface ensembles in this manner restricts the number and types of reaction pathways which will be utilized, thus greatly narrowing the product distribution and maximizing the efficiency of the Fischer-Tropsch reaction. Similarly, amines may also be produced by the conversion of reactant gas or gases, such as nitrogen, hydrogen, or hydrocarbon constituents.

  16. Method of inducing surface ensembles on a metal catalyst

    DOE Patents [OSTI]

    Miller, S.S.

    1987-10-02

    A method of inducing surface ensembles on a transition metal catalyst used in the conversion of a reactant gas or gas mixture, such as carbon monoxide and hydrogen into hydrocarbons (the Fischer-Tropsch reaction) is disclosed which comprises adding a Lewis base to the syngas (CO + H/sub 2/) mixture before reaction takes place. The formation of surface ensembles in this manner restricts the number and types of reaction pathways which will be utilized, thus greatly narrowing the product distribution and maximizing the efficiency of the Fischer-Tropsch reaction. Similarly, amines may also be produced by the conversion of reactant gas or gases, such as nitrogen, hydrogen, or hydrocarbon constituents.

  17. Ad Building demolition, recycling completed

    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 ofkandz-cm11 Outreach Home Room News Publications Traditional Knowledge KiosksAbout AwardedAcronyms This is aHomeAd Building

  18. Light-cone AdS/CFT-adapted approach to AdS fields/currents, shadows, and conformal fields

    E-Print Network [OSTI]

    R. R. Metsaev

    2015-07-23

    Light-cone gauge formulation of fields in AdS space and conformal field theory in flat space adapted for the study of AdS/CFT correspondence is developed. Arbitrary spin mixed-symmetry fields in AdS space and arbitrary spin mixed-symmetry currents, shadows, and conformal fields in flat space are considered on an equal footing. For the massless and massive fields in AdS and the conformal fields in flat space, simple light-cone gauge actions leading to decoupled equations of motion are found. For the currents and shadows, simple expressions for all 2-point functions are also found. We demonstrate that representation of conformal algebra generators on space of currents, shadows, and conformal fields can be built in terms of spin operators entering the light-cone gauge formulation of AdS fields. This considerably simplifies the study of AdS/CFT correspondence. Light-cone gauge actions for totally symmetric arbitrary spin long conformal fields in flat space are presented. We apply our approach to the study of totally antisymmetric (one-column) and mixed-symmetry (two-column) fields in AdS space and currents, shadows, and conformal fields in flat space.

  19. Note: Proton irradiation at kilowatt-power and neutron production from a free-surface liquid-lithium target

    SciTech Connect (OSTI)

    Halfon, S.; Feinberg, G. [Soreq NRC, Yavne 81800 (Israel); Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel); Arenshtam, A.; Kijel, D.; Weissman, L.; Aviv, O.; Berkovits, D.; Dudovitch, O.; Eisen, Y.; Eliyahu, I.; Haquin, G.; Hazenshprung, N.; Kreisel, A.; Mardor, I.; Shimel, G.; Shor, A.; Silverman, I.; Yungrais, Z. [Soreq NRC, Yavne 81800 (Israel); Paul, M., E-mail: paul@vms.huji.ac.il; Tessler, M. [Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel)

    2014-05-15

    The free-surface Liquid-Lithium Target, recently developed at Soreq Applied Research Accelerator Facility (SARAF), was successfully used with a 1.9 MeV, 1.2 mA (2.3 kW) continuous-wave proton beam. Neutrons (?2 × 10{sup 10} n/s having a peak energy of ?27 keV) from the {sup 7}Li(p,n){sup 7}Be reaction were detected with a fission-chamber detector and by gold activation targets positioned in the forward direction. The setup is being used for nuclear astrophysics experiments to study neutron-induced reactions at stellar energies and to demonstrate the feasibility of accelerator-based boron neutron capture therapy.

  20. U(1) Instantons on AdS_4 and the Uplift to Exact Supergravity Solutions

    E-Print Network [OSTI]

    Ali Imaanpur

    2011-11-23

    We consider self-duality equation of U(1) gauge fields on Euclidean AdS_4 space, and find a simple finite action solution. With a suitable ansatz, we are able to embed this solution into the 10d supergravity background of AdS_4\\times CP^3. Further, we show that the solution can be uplifted to an exact solution in 11d supergravity background of AdS_4\\times SE_7.

  1. Dynamical sectors for a spinning particle in AdS3 Carles Batlle1

    E-Print Network [OSTI]

    Batlle, Carles

    Dynamical sectors for a spinning particle in AdS3 Carles Batlle1 , Joaquim Gomis2 , Kiyoshi the dynamics of a particle of mass M and spin J in AdS3. The study reveals the presence of different dynamical sectors depending on the relative values of M, J and the AdS3 radius R. For the subcritical M2 R2 -J2 > 0

  2. AdS solutions to the 2D type 0A effective action David Mattoon Thompson*

    E-Print Network [OSTI]

    Romps, David M.

    AdS solutions to the 2D type 0A effective action David Mattoon Thompson* Jefferson Physical November 2004) We present a two-parameter family of AdS solutions to the two-dimensional type 0A effective action. DOI: 10.1103/PhysRevD.70.106001 PACS numbers: 11.25.Mj I. INTRODUCTION AdS backgrounds of string

  3. Ads-Portal Domains: Identification and Measurements

    E-Print Network [OSTI]

    Yang, Xiaowei

    4 Ads-Portal Domains: Identification and Measurements MISHARI ALMISHARI University of California, Irvine and XIAOWEI YANG Duke University An ads-portal domain refers to a Web domain that shows only develop a machine-learning- based classifier to identify ads-portal domains, which has 96% accuracy. We

  4. Longitudinal Analysis of Android Ad Library Permissions

    E-Print Network [OSTI]

    Wallach, Dan

    Longitudinal Analysis of Android Ad Library Permissions Theodore Book, Adam Pridgen, Dan S. Wallach in the behavior of Android ad libraries. Taking a sample of 114,000 apps, we extract and classify their ad particular risks to user privacy and security. I. INTRODUCTION The Android operating system is one

  5. The different phases of hairy black holes in AdS5 space

    E-Print Network [OSTI]

    Gaston Giribet; Andres Goya; Julio Oliva

    2014-12-31

    We investigate the thermodynamics of hairy black holes in asymptotically Anti-de Sitter (AdS) space, including backreaction. Resorting to the Euclidean path integral approach, we show that matter conformally coupled to Einstein gravity in five dimensions may exhibit a phase transition whose endpoint turns out to be a hairy black hole in AdS5 space. The scalar field configuration happens to be regular everywhere outside and on the horizon, and behaves asymptotically in such a way that respects the AdS boundary conditions that are relevant for AdS/CFT. The theory presents other peculiar features in the ultraviolet, like the existence of black holes with arbitrarily low temperature in AdS5. This provides a simple setup in which the fully backreacting problem of a hair forming in AdS at certain critical temperature can be solved analytically.

  6. The different phases of hairy black holes in AdS5 space

    E-Print Network [OSTI]

    Giribet, Gaston; Oliva, Julio

    2015-01-01

    We investigate the thermodynamics of hairy black holes in asymptotically Anti-de Sitter (AdS) space, including backreaction. Resorting to the Euclidean path integral approach, we show that matter conformally coupled to Einstein gravity in five dimensions may exhibit a phase transition whose endpoint turns out to be a hairy black hole in AdS5 space. The scalar field configuration happens to be regular everywhere outside and on the horizon, and behaves asymptotically in such a way that respects the AdS boundary conditions that are relevant for AdS/CFT. The theory presents other peculiar features in the ultraviolet, like the existence of black holes with arbitrarily low temperature in AdS5. This provides a simple setup in which the fully backreacting problem of a hair forming in AdS at certain critical temperature can be solved analytically.

  7. SQL is Dead; Long Live SQL: Lightweight Query Services for Ad Hoc Research Data

    E-Print Network [OSTI]

    Matrajt, Graciela

    SQL is Dead; Long Live SQL: Lightweight Query Services for Ad Hoc Research Data Bill Howe billhowe with ad hoc scientific Q&A. Further: · We reject the conventional wisdom that "scientists won't write SQL a production-quality database server. · We observe that simply sharing examples of SQL queries allows

  8. Strings on AdS2 and the high-energy limit of noncritical M-theory

    E-Print Network [OSTI]

    Horava, Petr

    2008-01-01

    B. Clark, and A. Karch, The CFT/AdS correspondence, massiveCoordinate-free action for AdS(3) higher-spin-matterKlebanov and A. M. Polyakov, AdS dual of the critical O(N)

  9. Surface Soil

    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 ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired Solar Fuel Production 1: TotalofSupplySurface Soil Surface Soil We

  10. The Incremental Reach and Cost Efficiency of Online Video Ads over TV Ads

    E-Print Network [OSTI]

    Cortes, Corinna

    The Incremental Reach and Cost Efficiency of Online Video Ads over TV Ads Yuxue Jin, Sheethal number of brand marketers are including video ads in their advertising campaigns. These advertisers would like to know the incremental reach and cost efficiency of their video and display ads compared

  11. Boundary conditions for conformally coupled scalar in AdS$_4$

    E-Print Network [OSTI]

    Jae-Hyuk Oh

    2015-02-05

    We consider conformally coupled scalar with $\\phi^4$ coupling in AdS$_4$ and study its various boundary conditions on AdS boundary. We have obtained perturbative solutions of equation of motion of the conformally coupled scalar with power expansion order by order in $\\phi^4$ coupling $\\lambda$ up to $\\lambda^2$ order. In its dual CFT, we get 2,4 and 6 point functions by using this solution with Dirichlet and Neumann boundary conditions via AdS/CFT dictionary. We also consider marginal deformation on AdS boundary and get its on-shell and boundary effective actions.

  12. LWR (Light Water Reactor) power plant simulations using the AD10 and AD100 systems

    SciTech Connect (OSTI)

    Wulff, W.; Cheng, H.S.; Chien, C.J.; Jang, J.Y.; Lin, H.C.; Mallen, A.N.; Wang, S.J. (Brookhaven National Lab., Upton, NY (USA); Institute of Nuclear Energy Research, Lung-Tan (Taiwan); Tawian Power Co., Taipei (Taiwan); Brookhaven National Lab., Upton, NY (USA); Institute of Nuclear Energy Research, Lung-Tan (Taiwan))

    1989-01-01

    Boiling (BWR) and Pressurized (PWR) Water Reactor Power Plants are being simulated at BNL with the AD10 and AD100 Peripheral Processor Systems. The AD10 system has been used for BWR simulations since 1984 for safety analyses, emergency training and optimization studies. BWR simulation capabilities have been implemented recently on the AD100 system and PWR simulation capabilities are currently being developed under the auspices of international cooperation. Modeling and simulation methods are presented with emphasis on the simulation of the Nuclear Steam Supply System. Results are presented for BWR simulation and performance characteristics are compared of the AD10 and AD100 systems. It will be shown that the AD100 simulates two times faster than two AD10 processors operating in parallel and that the computing capacity of one AD100 (with FMU processor) is twice as large as that of two AD10 processors. 9 refs., 5 figs., 1 tab.

  13. Non-Relativistic AdS Branes and Newton-Hooke Superalgebra

    E-Print Network [OSTI]

    Makoto Sakaguchi; Kentaroh Yoshida

    2006-05-12

    We examine a non-relativistic limit of D-branes in AdS_5xS^5 and M-branes in AdS_{4/7}xS^{7/4}. First, Newton-Hooke superalgebras for the AdS branes are derived from AdSxS superalgebras as Inonu-Wigner contractions. It is shown that the directions along which the AdS-brane worldvolume extends are restricted by requiring that the isometry on the AdS-brane worldvolume and the Lorentz symmetry in the transverse space naturally extend to the super-isometry. We also derive Newton-Hooke superalgebras for pp-wave branes and show that the directions along which a brane worldvolume extends are restricted. Then the Wess-Zumino terms of the AdS branes are derived by using the Chevalley-Eilenberg cohomology on the super-AdSxS algebra, and the non-relativistic limit of the AdS-brane actions is considered. We show that the consistent limit is possible for the following branes: Dp (even,even) for p=1 mod 4 and Dp (odd,odd) for p=3 mod 4 in AdS_5xS^5, and M2 (0,3), M2 (2,1), M5 (1,5) and M5 (3,3) in AdS_{4}xS^{7} and S^{4}xAdS_{7}. We furthermore present non-relativistic actions for the AdS branes.

  14. VALUE-ADDED SORBENT DEVELOPMENT

    SciTech Connect (OSTI)

    Grant E. Dunham; Edwin S. Olson; Stanley J. Miller

    2000-07-01

    On a worldwide basis, the projected increase in coal usage over the next two decades in China, India, and Indonesia will dwarf the current U.S. coal consumption of 1 billion tons/year. Therefore, in the United States, coal will be the dominant source of mercury emissions, and worldwide, coal may be the cause of significantly increased mercury emissions unless an effective control strategy is implemented. However, there is much uncertainty over the most technically sound and cost-effective approach for reducing mercury emissions from coal-fired boilers. Several approaches are suggested for mercury control from coal-fired boilers, including enhancing the ability of wet scrubbers to retain mercury. However, many coal-fired boilers are not equipped with wet scrubbers. On the other hand, since almost all coal-fired boilers are equipped with either an electrostatic precipitator (ESP) or a baghouse, sorbent injection upstream of either an ESP or baghouse appears attractive, because it has the potential to control both Hg{sup 0} and Hg{sup 2+}, would appear to be easy to retrofit, and would be applicable to both industrial and utility boilers. Since mercury in the gas stream from coal combustion is present in only trace quantities, only very small amounts of sorbent may be necessary. If we assume a mercury concentration of 10 {micro}g/m{sup 3} and a sorbent-to-mercury mass ratio of 1000:1, the required sorbent loading is 10 mg/m{sup 3}, which is only 0.1% to 0.2% of a typical dust loading of 5-10 g/m{sup 3} (2.2-4.4 grains/scf). This amount of additional sorbent material in the ash would appear to be negligible and would not be expected to have an impact on control device performance or ash utilization. Accomplishing effective mercury control with sorbent injection upstream of a particulate control device requires several critical steps: (1) Dispersion of the small sorbent particles and mixing with the flue gas must be adequate to ensure that all of the gas is effectively treated in the short residence time (typically a few seconds) between sorbent injection and particle collection. (2) Assuming the sorbent particles can be injected and dispersed adequately, a second critical step is the mass transfer by diffusion of the mercury from the bulk flue gas to the particle surface within the available residence time. The ideal case would be to achieve sufficient mass transfer in the duct and not depend on additional transfer within the collection device. (3) Once the mercury molecules reach the surface of a sorbent particle, they will not be trapped unless sorption can occur at a rate equal to the rate of mass transfer by diffusion to the particle surface. Analysis by Rostam-Abadi and others concluded that only a very small surface area would theoretically be required to trap the mercury. The implication is that reactive surface sites are much more important than the amount of surface area. (4) Assuming the sorbent has the capacity and reactivity to trap the mercury that reaches the sorbent particles, the final critical step is long-term stability of the sorbed mercury.

  15. Three-dimensional N=2 (AdS) supergravity and associated supercurrents

    E-Print Network [OSTI]

    Sergei M. Kuzenko; Gabriele Tartaglino-Mazzucchelli

    2012-09-28

    Long ago, Achucarro and Townsend discovered that in three dimensions (3D) N-extended anti-de Sitter (AdS) supergravity exists in several incarnations, which were called the (p,q) AdS supergravity theories with non-negative integers p>=q such that N=p+q. Using the superspace approach to 3D N-extended supergravity developed in arXiv:1101.4013, we present three superfield formulations for N=2 supergravity that allow for well defined cosmological terms and supersymmetric AdS solutions. The conformal compensators corresponding to these theories are respectively: (i) a chiral scalar multiplet: (ii) a vector multiplet; and (iii) an improved complex linear multiplet. The theories corresponding to (i) and (iii) are shown to provide two dually equivalent realizations of the (1,1) AdS supergravity, while (ii) describes the (2,0) AdS supergravity. We associate with each supergravity formulation, with and without a cosmological term, a consistent supercurrent multiplet. The supercurrents in the (1,1) and (2,0) AdS backgrounds are derived for the first time. We elaborate on rigid supersymmetric theories in (1,1) and (2,0) AdS superspaces.

  16. University Policy No.: AD2530 Classification: Administration

    E-Print Network [OSTI]

    Victoria, University of

    University Policy No.: AD2530 Classification: Administration PHOTOCOPY AND FACSIMILE (FAX may be obtained through library managed machines or through the use of personal accounts. 1

  17. Ad Lucem: Modeling Market Transformation Pathways Workshop

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

    AD LUCEM ... TOWARD THE LIGHT 3 Fig. 2: Projected solar market diffusion (including photovoltaic and concentrated solar power). Moore's law, the experience curve framework,...

  18. University Policy No.: AD2210 Classification: Administration

    E-Print Network [OSTI]

    Victoria, University of

    University Policy No.: AD2210 Classification: Administration FIELDWORK AND INTERNATIONAL: includes all University of Victoria administrators, faculty, staff, and students while such individuals

  19. University Policy No.: AD2215 Classification: Administration

    E-Print Network [OSTI]

    Victoria, University of

    University Policy No.: AD2215 Classification: Administration Approving Authority: Board Review: 1. This statement applies to the policies and administration of trademarks registered

  20. Aerosol Optical Depth Value-Added Product Report

    SciTech Connect (OSTI)

    Koontz, A; Hodges, G; Barnard, J; Flynn, C; Michalsky, J

    2013-03-17

    This document describes the process applied to retrieve aerosol optical depth (AOD) from multifilter rotating shadowband radiometers (MFRSR) and normal incidence multifilter radiometers (NIMFR) operated at the ARM Climate Research Facility’s ground-based facilities.

  1. ARSCL Cloud Statistics - A Value-Added Product

    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 ofkandz-cm11 OutreachProductswsicloudwsicloudden Documentation DataStreamsTotal OzoneStudy ofPlutoniumquarter 2003ARSCL Cloud

  2. Addendum Added to Innovative Demonstration of Geothermal Energy Production

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

    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 Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p u t y A s sconveyance(EPACT)SpringDOE during the DOESheet,FOA

  3. Doppler Lidar Vertical Velocity Statistics Value-Added Product

    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 theCovalentLaboratory |Sector Full reportTown2008Donald Raby Donald_ -49

  4. Recent Results in AdS/QCD

    E-Print Network [OSTI]

    Joshua Erlich

    2008-12-29

    AdS/QCD is an extra-dimensional approach to modeling the light hadronic resonances in QCD. AdS/QCD models are generally successful at reproducing low-energy observables with around 10-20% accuracy, depending on the details of the model. We discuss the motivation for these models, their intrinsic limitations, and some recent results.

  5. Kaon Decays from AdS/QCD

    E-Print Network [OSTI]

    Martin Schvellinger

    2008-06-03

    We briefly review one of the current applications of the AdS/CFT correspondence known as AdS/QCD and discuss about the calculation of four-point quark-flavour current correlation functions and their applications to the calculation of observables related to neutral kaon decays and neutral kaon mixing processes.

  6. Integrable twists in AdS/CFT

    E-Print Network [OSTI]

    Tristan McLoughlin; Ian Swanson

    2006-06-26

    A class of marginal deformations of four-dimensional N=4 super Yang-Mills theory has been found to correspond to a set of smooth, multiparameter deformations of the S^5 target subspace in the holographic dual on AdS_5 x S^5. We present here an analogous set of deformations that act on global toroidal isometries in the AdS_5 subspace. Remarkably, certain sectors of the string theory remain classically integrable in this larger class of so-called gamma-deformed AdS_5 x S^5 backgrounds. Relying on studies of deformed su(2)_gamma models, we formulate a local sl(2)_gamma Lax representation that admits a classical, thermodynamic Bethe equation (based on the Riemann-Hilbert interpretation of Bethe's ansatz) encoding the spectrum in the deformed AdS_5 geometry. This result is extended to a set of discretized, asymptotic Bethe equations for the twisted string theory. Near-pp-wave energy spectra within sl(2)_gamma and su(2)_gamma sectors provide a useful and stringent test of such equations, demonstrating the reliability of this technology in a wider class of string backgrounds. In addition, we study a twisted Hubbard model that yields certain predictions of the dual beta-deformed gauge theory.

  7. Duality invariance of $s \\ge 3/2$ fermions in AdS

    E-Print Network [OSTI]

    S. Deser; D. Seminara

    2014-09-11

    We show that in D=4 AdS, $s\\ge 3/2$ partially massless (PM) fermions retain the duality invariances of their flat space massless counterparts. They have tuned ratios $ {m^2}/{M^2}\

  8. Boundary conditions, effective action, and Virasoro algebra for AdS?

    E-Print Network [OSTI]

    Porfyriadis, Achilleas P

    2010-01-01

    We construct an effective action of General Relativity for small excitations from asymptotic transformations and use it to study conformal symmetry in the boundary of AdS3. By requiring finiteness of the boundary effective ...

  9. Near Flat Space limit of strings on AdS_4 x CP^3

    E-Print Network [OSTI]

    M. Kreuzer; R. C. Rashkov; M. Schimpf

    2008-11-03

    The non-linear nature of string theory on non-trivial backgrounds related to the AdS/CFT correspondence suggests to look for simplifications. Two such simplifications proved to be useful in studying string theory. These are the pp-wave limit which describes point-like strings and the so called "near flat space" limit which connects two different sectors of string theory -- pp-waves and "giant magnons". Recently another example of AdS/CFT duality emerged - $AdS_4/CFT_3$, which suggests duality between $\\mathcal N=6$ CS theory and superstring theory on $AdS_4\\times \\cp$. In this paper we study the "near flat space" limit of strings on the $AdS_4\\times \\cp$ background and discuss possible applications of the reduced theory.

  10. Turbulent strings in AdS/CFT

    E-Print Network [OSTI]

    Ishii, Takaaki

    2015-01-01

    We study nonlinear dynamics of the flux tube between an external quark-antiquark pair in $\\mathcal{N}=4$ super Yang-Mills theory using the AdS/CFT duality. In the gravity side, the flux tube is realized by a fundamental string whose endpoints are attached to the AdS boundary. We perturb the endpoints in various ways and numerically compute the time evolution of the nonlinearly oscillating string. As a result, cusps can form on the string, accompanied by weak turbulence and power law behavior in the energy spectrum. When cusps traveling on the string reach the boundary, we observe the divergence of the force between the quark and antiquark. Minimal amplitude of the perturbation below which cusps do not form is also investigated. No cusp formation is found when the string moves in all four AdS space directions, and in this case an inverse energy cascade follows a direct cascade.

  11. Turbulent strings in AdS/CFT

    E-Print Network [OSTI]

    Takaaki Ishii; Keiju Murata

    2015-06-25

    We study nonlinear dynamics of the flux tube between an external quark-antiquark pair in $\\mathcal{N}=4$ super Yang-Mills theory using the AdS/CFT duality. In the gravity side, the flux tube is realized by a fundamental string whose endpoints are attached to the AdS boundary. We perturb the endpoints in various ways and numerically compute the time evolution of the nonlinearly oscillating string. As a result, cusps can form on the string, accompanied by weak turbulence and power law behavior in the energy spectrum. When cusps traveling on the string reach the boundary, we observe the divergence of the force between the quark and antiquark. Minimal amplitude of the perturbation below which cusps do not form is also investigated. No cusp formation is found when the string moves in all four AdS space directions, and in this case an inverse energy cascade follows a direct cascade.

  12. Entropy of Warped Taub-NUT AdS Black String via the Brick Wall Method

    E-Print Network [OSTI]

    Chong Oh Lee

    2015-03-10

    When we consider five-dimensional warped Taub-NUT/bolt AdS black string with minimally coupled massive scalar field, we calculate entropies by using the brick wall method. It is found that they are proportional to being quadratically divergent in a cutoff parameter. In particular, we show that the entropy of warped Taub-NUT AdS black string holds for an area law in the bulk as well as on the brane.

  13. Geometry and supersymmetry of heterotic warped flux AdS backgrounds

    E-Print Network [OSTI]

    Beck, S W; Papadopoulos, G

    2015-01-01

    We classify the geometries of the most general warped, flux AdS backgrounds of heterotic supergravity up to two loop order in sigma model perturbation theory. We show under some mild assumptions that there are no $AdS_n$ backgrounds with $n\

  14. Supersymmetric branes in AdS2S2 Aaron Simons, Andrew Strominger, David Thompson, and Xi Yin

    E-Print Network [OSTI]

    Romps, David M.

    Supersymmetric branes in AdS2S2 CY3 Aaron Simons, Andrew Strominger, David Thompson, and Xi Yin-BPS (Bogomol'nyi- Prasad-Sommerfield) configurations, which are static for some choice of global AdS2 requires alignment of all the charge vectors. The radial position of the branes in global AdS2

  15. OKHEP-00-11 Quantum (In)Stability of a Brane-World AdS5 Universe at

    E-Print Network [OSTI]

    Milton, Kim

    OKHEP-00-11 Quantum (In)Stability of a Brane-World AdS5 Universe at Nonzero Temperature Iver Brevik effects of bulk matter (scalars, spinors) in the Randall-Sundrum AdS5 brane-world at nonzero temperature dynamical mechanism to stabilize the thermal AdS5 brane-world. It is shown that the brane separation

  16. AdAlyze Redux: Post-Click and Post-Conversion Text Feature Attribution for Sponsored Search Ads

    E-Print Network [OSTI]

    Cortes, Corinna

    AdAlyze Redux: Post-Click and Post-Conversion Text Feature Attribution for Sponsored Search Ads In this paper, we present our ongoing research on an ads quality testing tool that we call AdAlyze Redux of textual ads features, tailored to exactly the ads in an advertiser's set of accounts. This lets them

  17. Classical Worldsheets for String Scattering on Flat and AdS Spacetime

    E-Print Network [OSTI]

    Charles M. Sommerfield; Charles B. Thorn

    2008-05-21

    We present a study of the worldsheets that describe the classical limit of various string scattering processes. Our main focus is on string scattering in AdS spacetime because of its relation via the AdS/CFT correspondence to gluon scattering in {\\cal N}=4 supersymmetric Yang-Mills theory. But we also consider analogous processes in flat Minkowski spacetime which we compare to the AdS case. In addition to scattering of string by string we also find and study worldsheets describing the scattering of a string by external sources.

  18. Role of positive ions on the surface production of negative ions in a fusion plasma reactor type negative ion source—Insights from a three dimensional particle-in-cell Monte Carlo collisions model

    SciTech Connect (OSTI)

    Fubiani, G.; Boeuf, J. P. [Université de Toulouse, UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d'Energie), 118 route de Narbonne, F-31062 Toulouse cedex 9 (France) [Université de Toulouse, UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d'Energie), 118 route de Narbonne, F-31062 Toulouse cedex 9 (France); CNRS, LAPLACE, F-31062 Toulouse (France)

    2013-11-15

    Results from a 3D self-consistent Particle-In-Cell Monte Carlo Collisions (PIC MCC) model of a high power fusion-type negative ion source are presented for the first time. The model is used to calculate the plasma characteristics of the ITER prototype BATMAN ion source developed in Garching. Special emphasis is put on the production of negative ions on the plasma grid surface. The question of the relative roles of the impact of neutral hydrogen atoms and positive ions on the cesiated grid surface has attracted much attention recently and the 3D PIC MCC model is used to address this question. The results show that the production of negative ions by positive ion impact on the plasma grid is small with respect to the production by atomic hydrogen or deuterium bombardment (less than 10%)

  19. On excited states in real-time AdS/CFT

    E-Print Network [OSTI]

    Botta-Cantcheff, Marcelo; Silva, Guillermo A

    2015-01-01

    The Skenderis-van Rees prescription, which allows the calculation of time-ordered correlation functions of local operators in CFT's using holographic methods is studied and applied for excited states. Calculation of correlators and matrix elements of local CFT operators between generic in/out states are carried out in global Lorentzian AdS. We find the precise form of such states, obtain an holographic formula to compute the inner product between them, and using the consistency with other known prescriptions, we argue that the in/out excited states built according to the Skenderis-Van Rees prescription correspond to {\\it coherent} states in the (large-$N$) AdS-Hilbert space. This is confirmed by explicit holographic computations. The outcome of this study has remarkable implications on generalizing the Hartle-Hawking construction for wave functionals of excited states in AdS quantum gravity.

  20. AdS and Lifshitz Black Holes in Conformal and Einstein-Weyl Gravities

    E-Print Network [OSTI]

    H. Lu; Y. Pang; C. N. Pope; J. Vazquez-Poritz

    2012-04-14

    We study black hole solutions in extended gravities with higher-order curvature terms, including conformal and Einstein-Weyl gravities. In addition to the usual AdS vacuum, the theories admit Lifshitz and Schr\\"odinger vacua. The AdS black hole in conformal gravity contains an additional parameter over and above the mass, which may be interpreted as a massive spin-2 hair. By considering the first law of thermodynamics, we find that it is necessary to introduce an associated additional intensive/extensive pair of thermodynamic quantities. We also obtain new Liftshitz black holes in conformal gravity and study their thermodynamics. We use a numerical approach to demonstrate that AdS black holes beyond the Schwarzschild-AdS solution exist in Einstein-Weyl gravity. We also demonstrate the existence of asymptotically Lifshitz black holes in Einstein-Weyl gravity. The Lifshitz black holes arise at the boundary of the parameter ranges for the AdS black holes. Outside the range, the solutions develop naked singularities. The asymptotically AdS and Lifshitz black holes provide an interesting phase transition, in the corresponding boundary field theory, from a relativistic Lorentzian system to a non-relativistic Lifshitz system.

  1. Noncommutative geometry of AdS coordinates on a D-brane

    E-Print Network [OSTI]

    Lawrence B. Crowell

    2012-07-02

    In this short paper the noncommutative geometry and quantization of branes and the AdS is discussed. The question in part addresses an open problem left by this author in [1] on how branes are generated by stringy physics. The breaking of an open type I string into two strings generates a nascent brane at the new endpoints with inflationary cosmologies. This was left as a conjecture at the end of this paper on the role of quantum critical points in the onset of inflationary cosmology. The noncommutative geometry of the clock and lapse functions for the AdS-brane are derived as is the number of degrees of freedom which appear. The role of the AdS spacetime, or in particular its boundary, in cosmology is discussed in an elementary regularization scheme of the cosmological constant on the boundary. This is compared to schemes of conformal compactification of the AdS spacetime and the Heisenberg group.

  2. On Thermodynamics of AdS Black Holes in M-Theory

    E-Print Network [OSTI]

    A. Belhaj; M. Chabab; H. EL Moumni; K. Masmar; M. B. Sedra

    2015-09-07

    Motivated by a recent work on asymptotically AdS_4 black holes in M-theory, we investigate the thermodynamics and thermodynamical geometry of AdS black holes from M2 and M5-branes. Concretely, we consider AdS black holes in AdS_{p+2}\\times S^{11-p-2}, where p=2,5 by interpreting the number of M2 (and M5-branes) as a thermodynamical variable. We study the corresponding phase transition to examine their stabilities by calculating and discussing various thermodynamical quantities including the chemical potential. Then, we compute the thermodynamical curvatures from the Quevedo metric for M2 and M5-branes geometries to reconsider the stability of such black objects. The Quevedo metric singularities recover similar stability results provided by the phase transition program.

  3. Analysis of the structural parameters that influence gas production from the Devonian shale. Annual progress report, 1979-1980. Volume II. Data repository and reports published during fiscal year 1979-1980: regional structure, surface structure, surface fractures, hydrology

    SciTech Connect (OSTI)

    Negus-De Wys, J.; Dixon, J. M.; Evans, M. A.; Lee, K. D.; Ruotsala, J. E.; Wilson, T. H.; Williams, R. T.

    1980-10-01

    This volume comprises appendices giving regional structure data, surface structure data, surface fracture data, and hydrology data. The fracture data covers oriented Devonian shale cores from West Virginia, Ohio, Virginia, Pennsylvania, and Kentucky. The subsurface structure of the Eastern Kentucky gas field is also covered. (DLC)

  4. Construction of Rational Surfaces in Projective Fourspace

    E-Print Network [OSTI]

    Abo, Hirotachi

    surface. #12;Double point formula · X:= smooth surface in P4 . · H:= its hyperplane class. · K:= its families of smooth nongeneral-type surfaces in P4 (1995) can be found in W. Decker and S] 0 1 [S] 0 12 5 [AR2, AS] +1 0 0 1 [AR1] #12;References [ADS] H. Abo, W. Decker, N. Sasakura

  5. Position Number: (Assigned when added to Library)

    E-Print Network [OSTI]

    California at Davis, University of

    Position Number: (Assigned when added to Library) 02016240 Dept: INST OF TRANSPORTATION STUDIES distributions to social media and trade media. 20% WEBSITE, SOCIAL MEDIA AND MEDIA MONITORING Monitor trends

  6. Phase transition and thermodynamical geometry for Schwarzschild AdS black hole in $AdS_5\\times{S^5}$ spacetime

    E-Print Network [OSTI]

    Jia-Lin Zhang; Rong-Gen Cai; Hongwei Yu

    2015-03-03

    We study thermodynamics and thermodynamic geometry of a five-dimensional Schwarzschild AdS black hole in $AdS_5\\times{S^5}$ spacetime by treating the cosmological constant as the number of colors in the boundary gauge theory and its conjugate quantity as the associated chemical potential. It is found that the chemical potential is always negative in the stable branch of black hole thermodynamics and it has a chance to be positive, but appears in the unstable branch. We calculate scalar curvatures of the thermodynamical Weinhold metric, Ruppeiner metric and Quevedo metric, respectively and we find that the divergence of scalar curvature is related to the divergence of specific heat with fixed chemical potential in the Weinhold metric and Ruppeiner metric, while in the Quevedo metric the divergence of scalar curvature is related to the divergence of specific heat with fixed number of colors and the vanishing of the specific heat with fixed chemical potential.

  7. Measuring value added characteristics in feeder cattle 

    E-Print Network [OSTI]

    Mathews, Crystal Dawn

    2009-05-15

    VALUE-ADDED CHARACTERISTICS IN FEEDER CATTLE A Thesis by CRYSTAL DAWN MATHEWS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE... August 2007 Major Subject: Agricultural Economics MEASURING VALUE-ADDED CHARACTERISTICS IN FEEDER CATTLE A Thesis by CRYSTAL DAWN MATHEWS Submitted to the Office of Graduate Studies of Texas A&M University...

  8. AUAARHUS UNIVERSITY Adding of attachments Financial Control

    E-Print Network [OSTI]

    , and the picture file from this scan must be saved (on a PC or server) before the file is added to the expense sheet. Important: Attachments must be saved in PDF or TIF format. If the attachment is not added in one address or save the picture file on your PC or a server. Open the file and save it on your PC #12;AUAARHUS

  9. On the Thermodynamic Geometry and Critical Phenomena of AdS Black Holes

    E-Print Network [OSTI]

    Anurag Sahay; Tapobrata Sarkar; Gautam Sengupta

    2010-04-21

    In this paper, we study various aspects of the equilibrium thermodynamic state space geometry of AdS black holes. We first examine the Reissner-Nordstrom-AdS (RN-AdS) and the Kerr-AdS black holes. In this context, the state space scalar curvature of these black holes is analysed in various regions of their thermodynamic parameter space. This provides important new insights into the structure and significance of the scalar curvature. We further investigate critical phenomena, and the behaviour of the scalar curvature near criticality, for KN-AdS black holes in two mixed ensembles, introduced and elucidated in our earlier work arXiv:1002.2538 [hep-th]. The critical exponents are identical to those in the RN-AdS and Kerr-AdS cases in the canonical ensemble. This suggests an universality in the scaling behaviour near critical points of AdS black holes. Our results further highlight qualitative differences in the thermodynamic state space geometry for electric charge and angular momentum fluctuations of these.

  10. Creating Value Wood Products Industry

    E-Print Network [OSTI]

    1 Creating Value for the Wood Products Industry Creating Value for the Wood Products Industry for the Wood Products Industry The forest industry contributes more than 50 percent of the total value of all assistance to the primary and value-added processing wood products industries in Louisiana. Since its

  11. An Experiment with Digital Lighting in Adding Machine: A Musical

    E-Print Network [OSTI]

    Esfandiary, Rana; Reaney, Mark

    2014-01-01

    of house position. Virtual scenic elements were Figure 1. Mr. Zero at the office. Note the animation clip of swirling numbers visible on the stage floor. by Rana Esfandiary and Mark Reaney an experiment with digital l ighting in Adding Machine: A... in this production was two pair of computers and digital projectors, one mounted house left, the other house right, from which lighting effects could be gener- ated in real time using a series of recorded video sequences and real-time video manipulation software...

  12. Comments on Cosmic Censorship in AdS/CFT

    E-Print Network [OSTI]

    Hubeny, Veronika E.

    2009-01-01

    black hole singularity in AdS/CFT, [arXiv:hep-th/0306170]. [Censorship Violation in AdS, [arXiv:gr-qc/0405050]. [17] D.Quasinormal modes of AdS black holes and the approach to

  13. SAO/NASA ADS Help Pages May 30, 2014

    E-Print Network [OSTI]

    Hardcastle, Martin

    SAO/NASA ADS Help Pages ADS Team May 30, 2014 #12;Contents 1 Overview 4 1.1 What is the ADS? . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1.1 Use of the ADS . . . . . . . . . . . . . . . . . . . . . . . . 4 1.1.2 User Privacy . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 About the Data in the ADS . . . . . . . . . . . . . . . . . . . . . 6 1.2.1 Origin

  14. 2D Gravity on $AdS_2$ with Chern-Simons Corrections

    E-Print Network [OSTI]

    Mohsen Alishahiha; Reza Fareghbal; Amir E. Mosaffa

    2008-12-23

    We study 2D Maxwell-dilaton gravity with higher order corrections given by the Chern-Simons term. The model admits three distinctive $AdS_2$ vacuum solutions. By making use of the entropy function formalism we find the entropy of the solutions which is corrected due to the presence of the Chern-Simons term. We observe that the form of the correction depends not only on the coefficient of the Chern-Simons term, but also on the sign of the electric charge; pointing toward the chiral nature of the dual CFT. Using the asymptotic symmetry of the theory as well as requiring a consistent picture we can find the central charge and the level of U(1) current. Upon uplifting the solutions to three dimensions we get purely geometric solutions which will be either $AdS_3$ or warped $AdS_3$ with an identification.

  15. 2D Gravity on $AdS_2$ with Chern-Simons Corrections

    E-Print Network [OSTI]

    Alishahiha, Mohsen; Mosaffa, Amir E

    2009-01-01

    We study 2D Maxwell-dilaton gravity with higher order corrections given by the Chern-Simons term. The model admits three distinctive $AdS_2$ vacuum solutions. By making use of the entropy function formalism we find the entropy of the solutions which is corrected due to the presence of the Chern-Simons term. We observe that the form of the correction depends not only on the coefficient of the Chern-Simons term, but also on the sign of the electric charge; pointing toward the chiral nature of the dual CFT. Using the asymptotic symmetry of the theory as well as requiring a consistent picture we can find the central charge and the level of U(1) current. Upon uplifting the solutions to three dimensions we get purely geometric solutions which will be either $AdS_3$ or warped $AdS_3$ with an identification.

  16. Low frequency quasi-normal modes of AdS black holes

    E-Print Network [OSTI]

    George Siopsis

    2007-02-10

    We calculate analytically low frequency quasi-normal modes of gravitational perturbations of AdS Schwarzschild black holes in $d$ dimensions. We arrive at analytic expressions which are in agreement with their counterparts from linearized hydrodynamics in $S^{d-2}\\times \\mathbb{R}$, in accordance with the AdS/CFT correspondence. Our results are also in good agreement with results of numerical calculations.

  17. Global causal propagator for the KleinGordon equation on a class of supersymmetric AdS backgrounds

    E-Print Network [OSTI]

    Enciso, Alberto

    Global causal propagator for the Klein­Gordon equation on a class of supersymmetric AdS backgrounds analyze the Cauchy problem for the Klein­Gordon equation on the type IIB super- gravity backgrounds AdS5 of their connections to the AdS/CFT correspon- dence [2]. More precisely, if Y is a Sasaki­Einstein 5-manifold

  18. Computing and Using Metrics in the ADS

    E-Print Network [OSTI]

    Henneken, Edwin A; Kurtz, Michael J; Grant, Carolyn S; Thompson, Donna; Luker, Jay; Chyla, Roman; Holachek, Alexandra; Murray, Stephen S

    2014-01-01

    Finding measures for research impact, be it for individuals, institutions, instruments or projects, has gained a lot of popularity. More papers than ever are being written on new impact measures, and problems with existing measures are being pointed out on a regular basis. Funding agencies require impact statistics in their reports, job candidates incorporate them in their resumes, and publication metrics have even been used in at least one recent court case. To support this need for research impact indicators, the SAO/NASA Astrophysics Data System (ADS) has developed a service which provides a broad overview of various impact measures. In this presentation we discuss how the ADS can be used to quench the thirst for impact measures. We will also discuss a couple of the lesser known indicators in the metrics overview and the main issues to be aware of when compiling publication-based metrics in the ADS, namely author name ambiguity and citation incompleteness.

  19. QCD condensates in ADS/QCD

    E-Print Network [OSTI]

    Jacopo Bechi

    2009-09-25

    This paper focuses on some issues about condensates and renormalization in AdS/QCD models. In particular we consider the consistency of the AdS/QCD approach for scale dependent quantities as the chiral condensate questioned in some recent papers and the 4D meaning of the 5D cosmological constant in a model in which the QCD is dual to a 5D gravity theory. We will be able to give some arguments that the cosmological constant is related to the QCD gluon condensate.

  20. Adaptive Scheduling in Ad Hoc and Cellular Wireless Networks

    E-Print Network [OSTI]

    Tan, Choo Chin

    2013-01-01

    organization wireless networks and wireless mobile ad-hocfor heterogeneous wireless network”, in Proc. of IEEER. Khalaf, “Ad hoc wireless networks with mobile backbones,”

  1. Building America Expert Meeting: Key Innovations for Adding Energy...

    Energy Savers [EERE]

    Expert Meeting: Key Innovations for Adding Energy Efficiency to Maintenance Projects Building America Expert Meeting: Key Innovations for Adding Energy Efficiency to Maintenance...

  2. Adaptive Scheduling in Ad Hoc and Cellular Wireless Networks

    E-Print Network [OSTI]

    Tan, Choo Chin

    2013-01-01

    multicasting in energy-constrained wireless networks,” IEEEminimum-energy multicasting in wireless ad hoc networks,”minimum-energy multicasting in wireless ad hoc networks,” in

  3. Peculiarities of String Theory on AdS(4) x CP(3)

    E-Print Network [OSTI]

    Dmitri Sorokin; Linus Wulff

    2011-03-08

    We review peculiar features of type IIA string theory compactified on AdS(4) x CP(3) superspace, in particular, the structure of the Green-Schwarz action, issues with fixing its kappa-symmetry, classical integrability and the string instanton on CP(3)

  4. Gauge Non-Invariant Higher-Spin Currents in $AdS_4$

    E-Print Network [OSTI]

    Smirnov, P A

    2015-01-01

    Conserved currents of any spin $t>0$ built from bosonic symmetric massless gauge fields of arbitrary integer spins in $AdS_4$ are found. Analogously to the case of $4d$ Minkowski space, currents considered in this paper are not gauge invariant but generate gauge invariant conserved charges.

  5. Holographic Thermalization, stability of AdS, and the Fermi-Pasta-Ulam-Tsingou paradox

    E-Print Network [OSTI]

    Venkat Balasubramanian; Alex Buchel; Stephen R. Green; Luis Lehner; Steven L. Liebling

    2014-06-16

    For a real massless scalar field in general relativity with a negative cosmological constant, we uncover a large class of spherically symmetric initial conditions that are close to AdS, but whose numerical evolution does not result in black hole formation. According to the AdS/CFT dictionary, these bulk solutions are dual to states of a strongly interacting boundary CFT that fail to thermalize at late times. Furthermore, as these states are not stationary, they define dynamical CFT configurations that do not equilibrate. We develop a two-timescale perturbative formalism that captures both direct and inverse cascades of energy and agrees with our fully nonlinear evolutions in the appropriate regime. We also show that this formalism admits a large class of quasi-periodic solutions. Finally, we demonstrate a striking parallel between the dynamics of AdS and the classic Fermi-Pasta-Ulam-Tsingou problem.

  6. The Cornell Potential from General Geometries in AdS / QCD

    E-Print Network [OSTI]

    C D White

    2007-07-02

    We consider the heavy quark-antiquark potential in the AdS / QCD correspondence, focusing in particular on a recently calculated AdS-like metric deformed by back-reaction effects. We find that tuning the long-distance behaviour of the potential leads to a discrepancy at small distances, and discuss how to better constrain AdS / QCD geometries. A systematic comparison of various geometries is presented, based on goodness of fit to lattice data in the quenched approximation. The back-reacted geometry is seen to be phenomenologically favoured over an alternative geometry with the same number of parameters, although it does not perform as well as some other geometries.

  7. Surface silylated zeolite catalysts, and processes for the preparation, and use of the catalysts in the production of high octane gasoline

    SciTech Connect (OSTI)

    Cody, I.A.; Hammer, G.P.

    1991-01-15

    This patent describes a process for selectively hydrocracking an aromatic hydrocarbon feed. It comprises: hydrocracking the feed at hydrocracking conditions with a hydrocracking catalyst constituted of a metal hydrogenation component composited with a zeolite which contains, at ambient temperatures, greater than 50 percent NH{sub 4}{sup +} sites, and on its surface a chemisorbed silica-containing species, such that at hydrocracking temperatures ammonia is evolved to convert the zeolite to a surface silylated acid zeolite.

  8. OKHEP0011 Quantum (In)Stability of a BraneWorld AdS 5 Universe at

    E-Print Network [OSTI]

    Milton, Kim

    OKHEP­00­11 Quantum (In)Stability of a Brane­World AdS 5 Universe at Nonzero Temperature Iver the quantum e#ects of bulk matter (scalars, spinors) in the Randall­Sundrum AdS 5 brane­world at nonzero). That suggests a new dynamical mechanism to stabilize the thermal AdS 5 brane­world. It is shown that the brane

  9. The AdS/CFT partition function, AdS as a lift of a CFT, and holographic RG flow from conformal deformations

    E-Print Network [OSTI]

    Sean Cantrell

    2015-10-21

    Conformal deformations manifest in the AdS/CFT correspondence as boundary conditions on the AdS field. Heretofore, double-trace deformations have been the primary focus in this context. To better understand multitrace deformations, we revisit the relationship between the generating AdS partition function for a free bulk theory and the boundary CFT partition function subject to arbitrary conformal deformations. The procedure leads us to a formalism that constructs bulk fields from boundary operators. Using this formalism, we independently replicate the holographic RG flow narrative to go on to interpret the brane used to regulate the AdS theory as a renormalization scale. The scale-dependence of the dilatation spectrum of a boundary theory in the presence of general deformations can be thus understood on the AdS side using this formalism.

  10. 21st CENTURY ADS In CONTEXT

    E-Print Network [OSTI]

    McDonald, Kirk

    Accelerator-Driven System (ADS) · High power proton accelerator (E ~0.6 ­ 2 Gev; I = xmA > 5 MW) · Heavy accelerator-driven systems technology for nuclear waste transmutation and power generation (e.g., MYRRAH, SMART). · Finding #2: Accelerator-driven sub-critical systems offer the potential for safely burning

  11. LIQUOR POLICY University Policy No.: AD2400

    E-Print Network [OSTI]

    Victoria, University of

    Page 1 LIQUOR POLICY University Policy No.: AD2400 Classification: Administration Approving and Appendices: Procedures Associated with the University Liquor Policy Appendix ,,A - Licensed Establishments on University Property PURPOSE 1.00 The purpose of this policy is to: set out requirements regarding

  12. Politico, Sept. 11, 2012 Making Political Ads Personal

    E-Print Network [OSTI]

    Peha, Jon M.

    Politico, Sept. 11, 2012 Making Political Ads Personal Jon M. Peha Published in Politico, Sept. 11 seeing campaign ads sharply attacking current environmental regulations, another sees ads passionately arguing for stronger environmental regulations and the campaign ads you see never mention the environment

  13. ADS modules Adel Alahmadi, S. K. Jain and Andre Leroy

    E-Print Network [OSTI]

    André, Leroy

    ADS modules Adel Alahmadi, S. K. Jain and Andr´e Leroy Abstract We study the class of ADS rings such as injectivity and quasi-continuousity. A simple ring R such that RR is ADS must be either right self injective or indecomposable as right R- module. Under certain conditions we can construct a unique ADS hull up to isomorphism

  14. Viewability Prediction for Online Display Ads Information Systems Dept.

    E-Print Network [OSTI]

    Borcea, Cristian

    Viewability Prediction for Online Display Ads Chong Wang Information Systems Dept. New Jersey. Advertisers are charged by ad serv- ing, where their ads are shown in web pages. However, re- cent studies show that about half of the ads were actually never seen by users because they do not scroll deep

  15. The free energy of N=2 supersymmetric AdS_4 solutions of M-theory

    E-Print Network [OSTI]

    Maxime Gabella; Dario Martelli; Achilleas Passias; James Sparks

    2011-07-29

    We show that general N=2 supersymmetric AdS_4 solutions of M-theory with non-zero M2-brane charge admit a canonical contact structure. The free energy of the dual superconformal field theory on S^3 and the scaling dimensions of operators dual to supersymmetric wrapped M5-branes are expressed via AdS/CFT in terms of contact volumes. In particular, this leads to topological and localization formulae for the coefficient of N^{3/2} in the free energy of such solutions.

  16. High Energy Scattering in the AdS/CFT Correspondence

    E-Print Network [OSTI]

    Joao Penedones

    2008-02-06

    This work explores the celebrated AdS/CFT correspondence in the regime of high energy scattering in Anti--de Sitter (AdS) spacetime. In particular, we develop the eikonal approximation to high energy scattering in AdS and explore its consequences for the dual Conformal Field Theory (CFT). Using position space Feynman rules, we rederive the eikonal approximation for high energy scattering in flat space. Following this intuitive position space perspective, we then generalize the eikonal approximation for high energy scattering in AdS and other spacetimes. Remarkably, we are able to resum, in terms of a generalized phase shift, ladder and cross ladder Witten diagrams associated to the exchange of an AdS spin j field, to all orders in the coupling constant. By the AdS/CFT correspondence, the eikonal amplitude in AdS is related to the four point function of CFT primary operators in the regime of large 't Hooft coupling, including all terms of the 1/N expansion. We then show that the eikonal amplitude determines the behavior of the CFT four point function for small values of the cross ratios in a Lorentzian regime and that this controls its high spin and dimension conformal partial wave decomposition. These results allow us to determine the anomalous dimension of high spin and dimension double trace primary operators, by relating it to the AdS eikonal phase shift. Finally we find that, at large energies and large impact parameters in AdS, the gravitational interaction dominates all other interactions, as in flat space. Therefore, the anomalous dimension of double trace operators, associated to graviton exchange in AdS, yields a universal prediction for CFT's with AdS gravitational duals.

  17. Surface Soil

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

    Surface Soil Surface Soil We compare local soil samples with samples collected from northern New Mexico locations that are beyond the range of potential influence from normal...

  18. Impact of dynamic feedbacks between sedimentation, sea-level rise, and biomass production on near-surface marsh stratigraphy and carbon accumulation

    E-Print Network [OSTI]

    Mudd, Simon Marius

    -surface marsh stratigraphy and carbon accumulation Simon M. Mudd a,*, Susan M. Howell b , James T. Morris c model we explore how marsh stratigraphy responds to sediment supply and the rate of sea- level rise. It is calibrated and tested using an extensive data set of both marsh stratigraphy and measurements of vegetation

  19. Weak Field Collapse in AdS: Introducing a Charge Density

    E-Print Network [OSTI]

    Elena Caceres; Arnab Kundu; Juan F. Pedraza; Di-Lun Yang

    2015-06-29

    We study the effect of a non-vanishing chemical potential on the thermalization time of a strongly coupled large $N_c$ gauge theory in $(2+1)$-dimensions, using a specific bottom-up gravity model in asymptotically AdS space. We first construct a perturbative solution to the gravity-equations, which dynamically interpolates between two AdS black hole backgrounds with different temperatures and chemical potentials, in a perturbative expansion of a bulk neutral scalar field. In the dual field theory, this corresponds to a quench dynamics by a marginal operator, where the corresponding coupling serves as the small parameter in which the perturbation is carried out. The evolution of non-local observables, such as the entanglement entropy, suggests that thermalization time decreases with increasing chemical potential. We also comment on the validity of our perturbative analysis.

  20. Renormalization, averaging, conservation laws and AdS (in)stability

    E-Print Network [OSTI]

    Ben Craps; Oleg Evnin; Joris Vanhoof

    2015-01-19

    We continue our analytic investigations of non-linear spherically symmetric perturbations around the anti-de Sitter background in gravity-scalar field systems, and focus on conservation laws restricting the (perturbatively) slow drift of energy between the different normal modes due to non-linearities. We discover two conservation laws in addition to the energy conservation previously discussed in relation to AdS instability. A similar set of three conservation laws was previously noted for a self-interacting scalar field in a non-dynamical AdS background, and we highlight the similarities of this system to the fully dynamical case of gravitational instability. The nature of these conservation laws is best understood through an appeal to averaging methods which allow one to derive an effective Lagrangian or Hamiltonian description of the slow energy transfer between the normal modes. The conservation laws in question then follow from explicit symmetries of this averaged effective theory.

  1. Critical Dimension for Stable Self-gravitating Stars in AdS

    E-Print Network [OSTI]

    Zhong-Hua Li; Rong-Gen Cai

    2009-08-03

    We study the self-gravitating stars with a linear equation of state, $P=a \\rho$, in AdS space, where $a$ is a constant parameter. There exists a critical dimension, beyond which the stars are always stable with any central energy density; below which there exists a maximal mass configuration for a certain central energy density and when the central energy density continues to increase, the configuration becomes unstable. We find that the critical dimension depends on the parameter $a$, it runs from $d=11.1429$ to 10.1291 as $a$ varies from $a=0$ to 1. The lowest integer dimension for a dynamically stable self-gravitating configuration should be $d=12$ for any $a \\in [0,1]$ rather than $d=11$, the latter is the case of self-gravitating radiation configurations in AdS space.

  2. CFT dual of charged AdS black hole in the large dimension limit

    E-Print Network [OSTI]

    Er-Dong Guo; Miao Li; Jia-Rui Sun

    2015-12-28

    We study the dual CFT description of the $d+1$-dimensional Reissner-Nordstr\\"om-Anti de Sitter (RN-AdS$_{d+1}$) black hole in the large dimension (large $d$) limit, both for the extremal and nonextremal cases. The central charge of the dual CFT$_2$ (or chiral CFT$_1$) is calculated for the near horizon near extremal geometry which possess an AdS$_2$ structure. Besides, the $Q$-picture hidden conformal symmetry in the nonextremal background can be naturally obtained by a probe charged scalar field in the large $d$ limit, without the need to input the usual limits to probe the hidden conformal symmetry. Furthermore, an new dual CFT description of the nonextremal RN-AdS$_{d+1}$ black hole is found in the large $d$ limit and the duality is analyzed by comparing the entropies, the absorption cross sections and the retarded Green's functions obtained both from the gravity and the dual CFT sides.

  3. Homothety and Quasi Self Similarity in Asymptotically Flat and AdS Spacetimes

    E-Print Network [OSTI]

    Wenli Zhao

    2015-03-02

    For a spherically symmetric self-gravitating scalar field we study self similar and quasi-self similar solutions in asymptotically flat and AdS spacetimes in various dimensions. Our main approach relies on reducing the Einstein-Klein-Gordon system of equations under the self similarity assumption to a dynamical system. Applying standard techniques in the analysis of dynamical system we study the corresponding phase diagrams, gaining some insight into the short and long-term evolution of the system. In the asymptotically flat case the fixed points of the dynamical system correspond to conformally flat spacetimes. We observed a new transition from a fixed point to a black hole and we compute the corresponding exponent analytically. In the case of AdS spacetime, we observed the quasi self similar scalar field scattering to infinity after interfering near the center corresponding to the dynamical system with no fixed points.

  4. Extremal Static AdS Black Hole/CFT Correspondence in Gauged Supergravities

    E-Print Network [OSTI]

    H. Lu; Jianwei Mei; C. N. Pope; J. Vazquez-Poritz

    2009-01-13

    A recently proposed holographic duality allows the Bekenstein-Hawking entropy of extremal rotating black holes to be calculated microscopically, by applying the Cardy formula to the two-dimensional chiral CFTs associated with certain reparameterisations of azimuthal angular coordinates in the solutions. The central charges are proportional to the angular momenta of the black hole, and so the method degenerates in the case of static (non-rotating) black holes. We show that the method can be extended to encompass such charged static extremal AdS black holes by using consistent Kaluza-Klein sphere reduction ansatze to lift them to exact solutions in the low-energy limits of string theory or M-theory, where the electric charges become reinterpreted as angular momenta associated with internal rotations in the reduction sphere. We illustrate the procedure for the examples of extremal charged static AdS black holes in four, five, six and seven dimensions.

  5. Isometry Group Orbit Quantization of Spinning Strings in AdS_3 x S^3

    E-Print Network [OSTI]

    Martin Heinze; George Jorjadze; Luka Megrelidze

    2015-07-01

    Describing the bosonic AdS_3 x S^3 particle and string in SU(1,1) x SU(2) group variables, we provide a Hamiltonian treatment of the isometry group orbits of solutions via analysis of the pre-symplectic form. For the particle we obtain a one-parameter family of orbits parameterized by creation-annihilation variables, which leads to the Holstein-Primakoff realization of the isometry group generators. The scheme is then applied to spinning string solutions characterized by one winding number in AdS_3 and two winding numbers in S^3. We find a two-parameter family of orbits, where quantization again provides the Holstein-Primakoff realization of the symmetry generators with an oscillator type energy spectrum. Analyzing the minimal energy at strong coupling we verify the spectrum of short strings at special values of winding numbers.

  6. Distributed services for mobile ad hoc networks 

    E-Print Network [OSTI]

    Cao, Guangtong

    2005-11-01

    by equipping each node with a device like a GPS receiver, a GPS receiver?s functionality is limited due to its geographical constraints, high energy consumption and cost. Therefore, studying clock synchronization algorithms for mobile ad hoc networks has 7... Network Lifetime vs. Number of Nodes : : : : : : : : : : : : : : : : : 61 24 Standard Deviation of Remaining Energy vs. Number of Nodes : : : 63 25 The k-Mutual Exclusion System Architecture : : : : : : : : : : : : : 71 26 Operation of KRL Algorithm on a...

  7. ADS development in Japan Kenji KIKUCHI

    E-Print Network [OSTI]

    McDonald, Kirk

    , Fermi, Oct. 2009 / Kikuchi #12;Design parametersDesign parameters · Accelerator power: 20MW (1 3mA 1 5GeV)· Accelerator power: 20MW (1.3mA, 1.5GeV) · Reactor power: 800MW · SCLINAC (0.11.5GeV): 472m · Reactor size: 10m for a spallation target and a reactor coolant. · In the accelerator driven nuclear transmutation system (ADS), LBE

  8. Adding coal dust to coal batch

    SciTech Connect (OSTI)

    V.S. Shved; A.V.Berezin [OAO Koks, Kemerovo (Russian Federation)

    2009-05-15

    The granulometric composition of coke dust from the dry-slaking machine is determined. The influence of additions of 3-7% coke dust on the quality of industrial coking batch and the coke obtained by box coking is estimated. Adding 1% coke dust to coking batch does not markedly change the coke quality. Industrial equipment for the supply of dry-slaking dust to the batch is described.

  9. Recent Progress in AdS/CFT

    E-Print Network [OSTI]

    John H. Schwarz

    2009-07-28

    The study of AdS/CFT (or gauge/gravity) duality has been one of the most active and illuminating areas of research in string theory over the past decade. The scope of its relevance and the insights it is providing seem to be ever expanding. In this talk I briefly describe some of the attempts to explore how the duality works for maximally supersymmetric systems.

  10. Perturbative calculation of quasinormal modes of AdS Schwarzschild black holes

    SciTech Connect (OSTI)

    Musiri, Suphot; Ness, Scott; Siopsis, George [Department of Physics, Srinakharinwirot University, Bangkok 10110 (Thailand); Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)

    2006-03-15

    We calculate analytically quasinormal modes of AdS Schwarzschild black holes including first-order corrections. We consider massive scalar, gravitational and electromagnetic perturbations. Our results are in good agreement with numerical calculations. In the case of electromagnetic perturbations, ours is the first calculation to provide an analytic expression for quasinormal frequencies, because the effective potential vanishes at zeroth order. We show that the first-order correction is logarithmic.

  11. Stability of asymptotically AdS wormholes in vacuum against scalar field perturbations

    E-Print Network [OSTI]

    Diego H. Correa; Julio Oliva; Ricardo Troncoso

    2008-08-18

    The stability of certain class of asymptotically AdS wormholes in vacuum against scalar field perturbations is analyzed. For a free massive scalar field, the stability of the perturbation is guaranteed provided the squared mass is bounded from below by a negative quantity. Depending on the base manifold of the AdS asymptotics, this lower bound could be more stringent than the Breitenlohner-Freedman bound. An exact expression for the spectrum is found analytically. For a scalar field perturbation with a nonminimal coupling, slow fall-off asymptotic behavior is also allowed, provided the squared mass fulfills certain negative upper bound. Although the Ricci scalar is not constant, an exact expression for the spectrum of the scalar field can also be found, and three different quantizations for the scalar field can be carried out. They are characterized by the fall-off of the scalar field, which can be fast or slow with respect to each asymptotic region. For these perturbations, stability can be achieved in a range of negative squared masses which depends on the base manifold of the AdS asymptotics. This analysis also extends to a class of gravitational solitons with a single conformal boundary.

  12. Entropy of near-extremal black holes in AdS5

    SciTech Connect (OSTI)

    Simon, Joan; Balasubramanian, Vijay; de Boer, Jan; Jejjala, Vishnu; Simon, Joan

    2007-07-24

    We construct the microstates of near-extremal black holes in AdS_5 x S5 as gases of defects distributed in heavy BPS operators in the dual SU(N) Yang-Mills theory. These defects describe open strings on spherical D3-branes in the S5, and we show that they dominate the entropy by directly enumerating them and comparing the results with a partition sum calculation. We display new decoupling limits in which the field theory of the lightest open strings on the D-branes becomes dual to a near-horizon region of the black hole geometry. In the single-charge black hole we find evidence for an infrared duality between SU(N) Yang-Mills theories that exchanges the rank of the gauge group with an R-charge. In the two-charge case (where pairs of branes intersect on a line), the decoupled geometry includes an AdS_3 factor with a two-dimensional CFT dual. The degeneracy in this CFT accounts for the black hole entropy. In the three-charge case (where triples of branes intersect at a point), the decoupled geometry contains an AdS_2 factor. Below a certain critical mass, the two-charge system displays solutions with naked timelike singularities even though they do not violate a BPS bound. We suggest a string theoretic resolution of these singularities.

  13. AdS Geometry, projective embedded coordinates and associated isometry groups

    E-Print Network [OSTI]

    Roldao da Rocha; E. Capelas de Oliveira

    2006-03-20

    This work is intended to investigate the geometry of anti-de Sitter spacetime (AdS), from the point of view of the Laplacian Comparison Theorem (LCT), and to give another description of the hyperbolical embedding standard formalism of the de Sitter and anti-de Sitter spacetimes in a pseudo-Euclidean spacetime. It is shown how to reproduce some geometrical properties of AdS, from the LCT in AdS, choosing suitable functions that satisfy basic properties of Riemannian geometry. We also introduce and discuss the well-known embedding of a 4-sphere and a 4-hyperboloid in a 5-dimensional pseudo-Euclidean spacetime, reviewing the usual formalism of spherical embedding and the way how it can retrieve the Robertson-Walker metric. With the choice of the de Sitter metric static frame, we write the so-called reduced model in suitable coordinates. We assume the existence of projective coordinates, since de Sitter spacetime is orientable. From these coordinates, obtained when stereographic projection of the de Sitter 4-hemisphere is done, we consider the Beltrami geodesic representation, which gives a more general formulation of the seminal full model described by Schrodinger, concerning the geometry and the topology of de Sitter spacetime. Our formalism retrieves the classical one if we consider the metric terms over the de Sitter splitting on Minkowski spacetime. From the covariant derivatives we find the acceleration of moving particles, Killing vectors and the isometry group generators associated to de the Sitter spacetime.

  14. CFT adapted gauge invariant formulation of arbitrary spin fields in AdS and modified de Donder gauge

    E-Print Network [OSTI]

    R. R. Metsaev

    2009-01-22

    Using Poincare parametrization of AdS space, we study totally symmetric arbitrary spin massless fields in AdS space of dimension greater than or equal to four. CFT adapted gauge invariant formulation for such fields is developed. Gauge symmetries are realized similarly to the ones of Stueckelberg formulation of massive fields. We demonstrate that the curvature and radial coordinate contributions to the gauge transformation and Lagrangian of the AdS fields can be expressed in terms of ladder operators. Realization of the global AdS symmetries in the conformal algebra basis is obtained. Modified de Donder gauge leading to simple gauge fixed Lagrangian is found. The modified de Donder gauge leads to decoupled equations of motion which can easily be solved in terms of Bessel function. Interrelations between our approach to the massless AdS fields and the Stueckelberg approach to massive fields in flat space are discussed.

  15. Model Catalysis of Ammonia Synthesis ad Iron-Water Interfaces - ASum Frequency Generation Vibrational Spectroscopic Study of Solid-GasInterfaces and Anion Photoelectron Spectroscopic Study of Selected Anionclusters

    SciTech Connect (OSTI)

    Ferguson, Michael James

    2005-12-15

    The ammonia synthesis reaction has been studied using single crystal model catalysis combined with sum frequency generation (SFG) vibrational spectroscopy. The adsorption of gases N{sub 2}, H{sub 2}, O{sub 2} and NH{sub 3} that play a role in ammonia synthesis have been studied on the Fe(111) crystal surface by sum frequency generation vibrational spectroscopy using an integrated Ultra-High Vacuum (UHV)/high-pressure system. SFG spectra are presented for the dissociation intermediates, NH{sub 2} ({approx}3325 cm{sup -1}) and NH ({approx}3235 cm{sup -1}) under high pressure of ammonia or equilibrium concentrations of reactants and products on Fe(111) surfaces. Special attention was paid to understand how potassium promotion of the iron catalyst affects the intermediates of ammonia synthesis. An Fe(111) surface promoted with 0.2 monolayers of potassium red shifts the vibrational frequencies of the reactive surface intermediates, NH and NH{sub 2}, providing evidence for weakened the nitrogen-hydrogen bonds relative to clean Fe(111). Spectral features of these surface intermediates persisted to higher temperatures for promoted iron surfaces than for clean Fe(111) surfaces implying that nitrogen-iron bonds are stronger for the promoted surface. The ratio of the NH to NH{sub 2} signal changed for promoted surfaces in the presence of equilibrium concentrations of reactants and products. The order of adding oxygen and potassium to promoted surfaces does not alter the spectra indicating that ammonia induces surface reconstruction of the catalyst to produce the same surface morphology. When oxygen is co-adsorbed with nitrogen, hydrogen, ammonia or potassium on Fe(111), a relative phase shift of the spectra occurs as compared to the presence of adsorbates on clean iron surfaces. Water adsorption on iron was also probed using SFG vibrational spectroscopy. For both H{sub 2}O and D{sub 2}O, the only spectral feature was in the range of the free OH or free OD. From the absence of SFG spectra of ice-like structure we conclude that surface hydroxides are formed and no liquid water is present on the surface. Other than model catalysis, gas phase anion photoelectron spectroscopy of the Cl + H{sub 2} van der Waals well, silicon clusters, germanium clusters, aluminum oxide clusters and indium phosphide clusters were studied. The spectra help to map out the neutral potential energy surfaces of the clusters. For aluminum oxide, the structures of the anions and neutrals were explored and for silicon, germanium and indium phosphide the electronic structure of larger clusters was mapped out.

  16. No-carrier-added (/sup 18/F)-N-methylspiroperidol

    DOE Patents [OSTI]

    Shiue, C.Y.; Fowler, J.S.; Wolf, A.P.

    1985-10-04

    The present invention is directed to the synthesis of a radioligand, labeled with a positron emitting radionuclide which is suitable for dynamic studies in humans using positron emission transaxial tomography. No-carrier-added (NCA) (/sup 18/F)-N-methylspiroperiodl is prepared from four different sustrates: p-nitrobenzonitrile, cyclopropyl p-nitrophenyl ketone, p-cyclopropanoyl-N,N,N-trimethylanilinium iodide and p-cyclopropanoyl-N,N,N-trimethylanilinium perchlorate. The process for the production of NCA (/sup 18/F)-N-methylspiroperidol is a nucleophilic aromatic substitution reaction. Furthermore, the compound of this invention is shown to be effective as a new drug of choice for in vivo examination of dopamine binding sites in a human brain. In particular, this drug is primarily useful in the noninvasive technique of positron emission transaxial tomography (PETT).

  17. Alternative approach to the regularization of odd dimensional AdS gravity

    E-Print Network [OSTI]

    Pablo Mora

    2007-08-23

    In this paper I present an action principle for odd dimensional AdS gravity which consists of introducing another manifold with the same boundary and a very specific boundary term. This new action allows and alternative approach to the regularization of the theory, yielding a finite euclidean action and finite conserved charges. The choice of the boundary term is justified on the grounds that an enhanced 'almost off-shell' local AdS/Conformal symmetry arises for that very special choice. One may say that the boundary term is dictated by a guiding symmetry principle. Two sets of boundary conditions are considered, which yield regularization procedures analogous to (but different from) the standard 'background substraction' and 'counterterms' regularization methods. The Noether charges are constructed in general. As an application it is shown that for Schwarszchild-AdS black holes the charge associated to the time-like Killing vector is finite and is indeed the mass. The Euclidean action for Schwarzschild-AdS black holes is computed, and it turns out to be finite, and to yield the right thermodynamics. The previous paragraph may be interpreted in the sense that the boundary term dictated by the symmetry principle is the one that correctly regularizes the action.

  18. Adding International Rates | OpenEI Community

    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 JEnvironmental Jump to:EAand DaltonSolar Energy LLC JumpInformationAdding International Rates

  19. Ad Lucem Workshop Welcome | Department of Energy

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

    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 Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p u t y A s sconveyance(EPACT)SpringDOE during the DOE Ad Lucem

  20. UONPR No. 1, Elk Hills, 26R Reservoir, Elk Hills oil and gas field, Kern County, California: Management Review: Surface operations and measurements of production and injection volumes

    SciTech Connect (OSTI)

    Not Available

    1987-01-01

    Evans, Carey and Crozier was given the task to conduct a Management Review of the Surface Operations of the 26R Reservoir in UONPR No. 1, Elk Hills field, Kern County, California. The MER strategy for this reservoir is to maintain pressure, and toward this end, gas injection volumes are scheduled to amount to 110% of calculated withdrawals. In spite of this, however, reservoir pressure continues to decline. The purpose of this study was, therefore, to determine if, and to what extent, field operating practices and accounting procedures may be contributing to this dilemma and to make appropriate recommendations pertaining to correcting any deficiencies which may have been found.

  1. Apparatus and method for atmospheric pressure reactive atom plasma processing for shaping of damage free surfaces

    DOE Patents [OSTI]

    Carr; Jeffrey W. (Livermore, CA)

    2009-03-31

    Fabrication apparatus and methods are disclosed for shaping and finishing difficult materials with no subsurface damage. The apparatus and methods use an atmospheric pressure mixed gas plasma discharge as a sub-aperture polisher of, for example, fused silica and single crystal silicon, silicon carbide and other materials. In one example, workpiece material is removed at the atomic level through reaction with fluorine atoms. In this example, these reactive species are produced by a noble gas plasma from trace constituent fluorocarbons or other fluorine containing gases added to the host argon matrix. The products of the reaction are gas phase compounds that flow from the surface of the workpiece, exposing fresh material to the etchant without condensation and redeposition on the newly created surface. The discharge provides a stable and predictable distribution of reactive species permitting the generation of a predetermined surface by translating the plasma across the workpiece along a calculated path.

  2. Higher Dimensional Gravity, Propagating Torsion and AdS Gauge Invariance

    E-Print Network [OSTI]

    Ricardo Troncoso; Jorge Zanelli

    2000-10-02

    The most general theory of gravity in d-dimensions which leads to second order field equations for the metric has [(d-1)/2] free parameters. It is shown that requiring the theory to have the maximum possible number of degrees of freedom, fixes these parameters in terms of the gravitational and the cosmological constants. In odd dimensions, the Lagrangian is a Chern-Simons form for the (A)dS or Poincare groups. In even dimensions, the action has a Born-Infeld-like form. Torsion may occur explicitly in the Lagrangian in the parity-odd sector and the torsional pieces respect local (A)dS symmetry for d=4k-1 only. These torsional Lagrangians are related to the Chern-Pontryagin characters for the (A)dS group. The additional coefficients in front of these new terms in the Lagrangian are shown to be quantized.

  3. On Thermodynamics of AdS Black Holes in Arbitrary Dimensions

    E-Print Network [OSTI]

    A. Belhaj; M. Chabab; H. El Moumni; M. B. Sedra

    2012-09-23

    Considering the cosmological constant $\\Lambda$ as a thermodynamic pressure and its conjugate quantity as a thermodynamic volume as proposed in Kubiznak and Mann (2012), we discuss the critical behavior of charged AdS black hole in arbitrary dimensions $d$. In particular, we present a comparative study in terms of the spacetime dimension $d$ and the displacement of critical points controlling the transition between the small and the large black holes. Such behaviors vary nicely in terms of $d$. Among our result in this context consists in showing that the equation of state for a charged RN-AdS black hole predicts an universal number given by $\\frac{2d-5}{4d-8}$. The three dimensional solution is also discussed.

  4. Instantons and quark zero modes in AdS/QCD

    E-Print Network [OSTI]

    Jacopo Bechi

    2009-09-16

    In this paper the quark zero modes creation effect is studied in the context of the AdS/QCD approach. This effect is generated, in presence of instantons, by a new that can be added in the bulk.

  5. The Reach and Persuasiveness of Viral Video Ads

    E-Print Network [OSTI]

    Tucker, Catherine Elizabeth

    Many video ads are designed to go viral so that the total number of views they receive depends on customers sharing the ads with their friends. This paper explores the relationship between the number of views and how ...

  6. Managing On-air Ad Inventory in Broadcast Television

    E-Print Network [OSTI]

    Bollapragada, Srinivas; Mallik, Suman

    2008-01-01

    Motivated by the experiences of the National Broadcasting Company (NBC), we present an analytical model for managing on-air ad inventory in broadcast television. The ad inventory in this industry is priced based on rating ...

  7. A $\\mathcal{N}=2$ Supersymmetric $AdS_4$ Solution in M-theory

    E-Print Network [OSTI]

    Lozano, Yolanda; Montero, Jesús

    2015-01-01

    We find a new $\\mathcal{N}=2$ $AdS_4$ solution in M-theory supported by purely magnetic flux via a sequence of abelian and non-abelian T-dualities. This provides the second known example in this class besides the uplift of the Pernici and Sezgin solution to 7d gauged supergravity constructed in the eighties. We compute the free energy of the solution, and show that it scales as $N^{3/2}$. It is intriguing that even though the natural holographic interpretation is in terms of M5-branes wrapped on a special Lagrangian 3-cycle, this solution does not exhibit the expected $N^3$ behavior.

  8. Superconductors for superstrings on AdS_5 x T^{1,1}

    E-Print Network [OSTI]

    Francesco Aprile; Andrea Borghese; Aldo Dector; Diederik Roest; Jorge G. Russo

    2012-05-09

    We construct a one-parameter family of five-dimensional N=2 supergravity Lagrangians with an SU(2,1) / U(2) hypermultiplet. For certain values of the parameter, these are argued to describe the dynamics of scalar modes of superstrings on AdS_5 x T^{1,1}, and therefore to be dual to specific chiral primary operators of Klebanov-Witten superconformal field theory. We demonstrate that, below a critical temperature, the thermodynamics is dominated by charged black holes with hair for the scalars that are dual to the operator of lowest conformal dimension 3/2. The system thus enters into a superconducting phase where condenses.

  9. $P-V$ criticality of AdS black hole in $f(R)$ gravity

    E-Print Network [OSTI]

    Songbai Chen; Xiaofang Liu; Changqing Liu

    2013-05-31

    We study thermodynamics of a charged AdS black hole in the special $f(R)$ correction with the constant Ricci scalar curvature. Our results show that the the $f(R)$ correction influences the Gibbs free energy and the phase transition of system. The ratio $\\rho_c$ occurred at the critical point increases monotonically with the derivative term $f'(R_0)$. We also disclose that the critical exponents are the same as those of the liquid-gas phase transition in the Van der Waals model, which does not depend on the $f(R)$ correction considered here.

  10. Transition from AdS universe to DS universe in the BPP model

    E-Print Network [OSTI]

    Wontae Kim; Myungseok Yoon

    2007-03-03

    It can be shown that in the BPP model the smooth phase transition from the asymptotically decelerated AdS universe to the asymptotically accelerated DS universe is possible by solving the modified semiclassical equations of motion. This transition comes from noncommutative Poisson algebra, which gives the constant curvature scalars asymptotically. The decelerated expansion of the early universe is due to the negative energy density with the negative pressure induced by quantum back reaction, and the accelerated late-time universe comes from the positive energy and the negative pressure which behave like dark energy source in recent cosmological models.

  11. On Heat Properties of AdS Black Holes in Higher Dimensions

    E-Print Network [OSTI]

    A. Belhaj; M. Chabab; H. EL Moumni; K. Masmar; M. B. Sedra; A. Segui

    2015-07-01

    We investigate the heat properties of AdS Black Holes in higher dimensions. We consider the study of the corresponding thermodynamical properties including the heat capacity explored in the determination of the black hole stability. In particular, we compute the heat latent. To overcome the instability problem, the Maxwell construction, in the (T,S)-plane, is elaborated. This method is used to modify the the Hawking-Page phase structure by removing the negative heat capacity regions. Then, we discuss the thermodynamic cycle and the heat engines using the way based on the extraction of the work from a black hole solution.

  12. Conformally related massless fields in dS, AdS and Minkowski spaces

    E-Print Network [OSTI]

    E. Huguet; J. Queva; J. Renaud

    2006-03-09

    In this paper we write down the equation for a scalar conformally coupled field simultaneously for de Sitter (dS), anti-de Sitter (AdS) and Minkowski spacetime in d-dimensions. The curvature dependence appears in a very simple way through a conformal factor. As a consequence the process of curvature free limit, including wave functions limit and two-points functions, turns to be a straightforward issue. We determine a set of modes, that we call de Sitter plane waves, which become ordinary plane waves when the curvature vanishes.

  13. A D2-brane in the Penrose limits of AdS(4)x CP(3)

    E-Print Network [OSTI]

    M. Ali-Akbari

    2010-05-02

    We consider a D2-brane in the pp-wave backgrounds obtained from AdS$_4\\times$CP$^3$ when electric and magnetic fields have been turned on. Upon fixing the light-cone gauge, light-cone Hamiltonian and BPS configurations are obtained. In particular we study BPS configurations with electric dipole on the two sphere giant and a giant graviton rotating in transverse directions. Moreover we show that the gauge field living on the D2-brane is replaced by a scalar field in the light-cone Hamiltonian. We also present a matrix model by regularizing (quantizing) 2-brane theory.

  14. AdS/QCD at finite density and temperature

    SciTech Connect (OSTI)

    Kim, Y., E-mail: ykim@apctp.org [Pohang University of Science and Technology, Asia Pacific Center for Theoretical Physics and Department of Physics (Korea, Republic of)

    2012-07-15

    We review some basics of AdS/QCD following a non-standard path and list a few results from AdS/QCD or holographic QCD. The non-standard path here is to use the analogy of the way one obtains an effective model of QCD like linear sigma model and the procedure to construct an AdS/QCD model based on the AdS/CFT dictionary.

  15. Approximate Minimum-Energy Multicasting in Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Liang, Weifa

    Approximate Minimum-Energy Multicasting in Wireless Ad Hoc Networks Weifa Liang, Senior Member, IEEE Abstract--A wireless ad hoc network consists of mobile nodes that are equipped with energy on energy conservation in wireless ad hoc networks have been conducted. For example, energy efficient

  16. Categorization of Display Ads using Image and Landing Page Features

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Categorization of Display Ads using Image and Landing Page Features Andrew Kae Department the problem of automatically categorizing display ad images into a taxonomy of relevant interest categories. In particu- lar, we focus on the efficacy of using image features extracted by OCR techniques from the ad

  17. Low-Interference Topology Control for Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Li, Xiang-Yang

    wireless ad hoc networks. Many aspects of the networking will affect the energy consumption of the wireless may cause larger energy consumption. In wireless ad hoc networks, each wireless device can selectively1 Low-Interference Topology Control for Wireless Ad Hoc Networks Kousha Moaveni-Nejad, Xiang

  18. Google's Auction for Radio and TV Ads Preliminary version

    E-Print Network [OSTI]

    Cortes, Corinna

    Google's Auction for Radio and TV Ads Preliminary version Noam Nisan Jason Bayer Deepak Chandra Tal. Abstract This document describes the auction system used by Google for allocation and pricing of TV ads and Radio ads. It is based on a simultaneous ascending auction, and has been in use since September 2008. 0

  19. New Stochastic Algorithms for Placing Ads in Sponsored Search

    E-Print Network [OSTI]

    Feuerstein, Esteban

    New Stochastic Algorithms for Placing Ads in Sponsored Search Esteban Feuerstein Depto. de@baeza.cl ABSTRACT We introduce a family of algorithms for the selection of ads in sponsored search that intends to increase ad diversity while not significantly reducing revenue and maintaining an incentive for advertisers

  20. LEARNING-BASED ROUTE MANAGEMENT IN WIRELESS AD HOC NETWORKS

    E-Print Network [OSTI]

    Littman, Michael L.

    and Wade Trappe The nodes in a wireless ad hoc network must act as routers in a self-configuring network to shortest-path routing protocols for managing router congestion and noise in wireless ad hoc networks. iiLEARNING-BASED ROUTE MANAGEMENT IN WIRELESS AD HOC NETWORKS BY BRIAN RUSSELL A dissertation

  1. Enhancing Cellular Multicast Performance Using Ad Hoc Networks

    E-Print Network [OSTI]

    Kasera, Sneha Kumar

    Enhancing Cellular Multicast Performance Using Ad Hoc Networks Jun Cheol Park and Sneha Kumar heterogeneity problem in cellular multicast with the help of an additional IEEE 802.11 ad hoc network. The basic idea is to allow the cellular receivers experiencing poor channel conditions to use the ad hoc network

  2. Maximizing Battery Life Routing in Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Liang, Weifa

    Maximizing Battery Life Routing in Wireless Ad Hoc Networks Weifa Liang Department of Computer Abstract--Most wireless ad hoc networks consist of mobile devices which operate on batteries. Power con, for an ad hoc network consisting of the same type of battery mobile nodes, two approximation algorithms

  3. Review of AdS/CFT Integrability, Chapter IV.3: N=6 Chern-Simons and Strings on AdS4xCP3

    E-Print Network [OSTI]

    Thomas Klose

    2012-03-27

    We review the duality and integrability of N=6 superconformal Chern-Simons theory in three dimensions and IIA superstring theory on the background AdS4xCP3. We introduce both of these models and describe how their degrees of freedom are mapped to excitations of a long-range integrable spin-chain. Finally, we discuss the properties of the Bethe equations, the S-matrix and the algebraic curve that are special to this correspondence and differ from the case of N=4 SYM theory and strings on AdS5xS5.

  4. Vacuum densities for a thick brane in AdS spacetime

    E-Print Network [OSTI]

    A. A. Saharian; A. L. Mkhitaryan

    2007-10-18

    For a massive scalar field with general curvature coupling parameter we evaluate Wightman function, vacuum expectation values of the field square and the energy-momentum tensor induced by a $Z_{2}$-symmetric brane with finite thickness located on $(D+1)$-dimensional AdS bulk. For the general case of static plane symmetric interior structure the expectation values in the region outside the brane are presented as the sum of free AdS and brane induced parts. For a conformally coupled massless scalar the brane induced part in the vacuum energy-momentum tensor vanishes. In the limit of strong gravitational fields the brane induced parts are exponentially suppressed for points not too close to the brane boundary. As an application of general results a special model is considered in which the geometry inside the brane is a slice of the Minkowski spacetime orbifolded along the direction perpendicular to the brane. For this model the Wightman function, vacuum expectation values of the field square and the energy-momentum tensor inside the brane are evaluated. It is shown that for both minimally and conformally coupled scalar fields the interior vacuum forces acting on the brane boundaries tend to decrease the brane thickness.

  5. Quartic AdS Interactions in Higher-Spin Gravity from Conformal Field Theory

    E-Print Network [OSTI]

    Bekaert, Xavier; Ponomarev, Dmitry; Sleight, Charlotte

    2015-01-01

    Clarifying the locality properties of higher-spin gravity is a pressing task, but notoriously difficult due to the absence of a weakly-coupled flat regime. The simplest non-trivial case where this question can be addressed is the quartic self-interaction of the AdS scalar field present in the higher-spin multiplet. We investigate this issue in the context of the holographic duality between the minimal bosonic higher-spin theory on AdS$_4$ and the free $O\\left(N\\right)$ vector model in three dimensions. In particular, we determine the exact explicit form of the derivative expansion of the bulk scalar quartic vertex. The quartic vertex is obtained from the field theory four-point function of the operator dual to the bulk scalar, by making use of our previous results for the Witten diagrams of higher-spin exchanges. This is facilitated by establishing the conformal block expansions of both the boundary four-point function and the dual bulk Witten diagram amplitudes. We show that the vertex we find satisfies a ge...

  6. Geometric free energy of toric AdS4/CFT3 models

    E-Print Network [OSTI]

    Sangmin Lee; Daisuke Yokoyama

    2015-01-22

    We study the supersymmetric free energy of three dimensional Chern-Simons-matter theories holographically dual to AdS$_4$ times toric Sasaki-Einstein seven-manifolds. In the large $N$ limit, we argue that the square of the free energy can be written as a quartic polynomial of trial R-charges. The coefficients of the polynomial are determined geometrically from the toric diagrams. We present the coefficients of the quartic polynomial explicitly for generic toric diagrams with up to 6 vertices, and some particular diagrams with 8 vertices. Decomposing the trial R-charges into mesonic and baryonic variables, and eliminating the baryonic ones, we show that the quartic polynomial reproduces the inverse of the Martelli-Sparks-Yau volume function. On the gravity side, we explore the possibility of using the same quartic polynomial as the prepotential in the AdS gauged supergravity. Comparing Kaluza-Klein gravity and gauged supergravity descriptions, we find perfect agreement in the mesonic sector but some discrepancy in the baryonic sector.

  7. Emergent IR dual 2d CFTs in charged AdS5 black holes

    E-Print Network [OSTI]

    Jan de Boer; Maria Johnstone; M. M. Sheikh-Jabbari; Joan Simon

    2011-12-20

    We study the possible dynamical emergence of IR conformal invariance describing the low energy excitations of near-extremal R-charged global AdS5 black holes. We find interesting behavior especially when we tune parameters in such a way that the relevant extremal black holes have classically vanishing horizon area, i.e. no classical ground-state entropy, and when we combine the low energy limit with a large N limit of the dual gauge theory. We consider both near-BPS and non-BPS regimes and their near horizon limits, emphasize the differences between the local AdS3 throats emerging in either case, and discuss potential dual IR 2d CFTs for each case. We compare our results with the predictions obtained from the Kerr/CFT correspondence, and obtain a natural quantization for the central charge of the near-BPS emergent IR CFT which we interpret in terms of the open strings stretched between giant gravitons.

  8. Quantum compositeness of gravity: black holes, AdS and inflation

    SciTech Connect (OSTI)

    Dvali, Gia; Gomez, Cesar E-mail: cesar.gomez@uam.es

    2014-01-01

    Gravitational backgrounds, such as black holes, AdS, de Sitter and inflationary universes, should be viewed as composite of N soft constituent gravitons. It then follows that such systems are close to quantum criticality of graviton Bose-gas to Bose-liquid transition. Generic properties of the ordinary metric description, including geodesic motion or particle-creation in the background metric, emerge as the large-N limit of quantum scattering of constituent longitudinal gravitons. We show that this picture correctly accounts for physics of large and small black holes in AdS, as well as reproduces well-known inflationary predictions for cosmological parameters. However, it anticipates new effects not captured by the standard semi-classical treatment. In particular, we predict observable corrections that are sensitive to the inflationary history way beyond last 60 e-foldings. We derive an absolute upper bound on the number of e-foldings, beyond which neither de Sitter nor inflationary Universe can be approximated by a semi-classical metric. However, they could in principle persist in a new type of quantum eternity state. We discuss implications of this phenomenon for the cosmological constant problem.

  9. Wilson Loops in 3d QFT from D-branes in AdS(4) x CP**3

    E-Print Network [OSTI]

    J. Kluson; Kamal L. Panigrahi

    2009-03-09

    We study the Wilson loops and defects in the three dimensional QFT from the D-branes in the AdS(4) x CP**3 geometry. We find out explicit D-brane configurations in the bulk which correspond to both straight and circular Wilson lines extended to the boundary of AdS(4). We analyze critically the role of boundary contributions to the D2-branes with various topology and to the fundamental string actions.

  10. Adding Gauge Fields to Kaplan's Fermions

    E-Print Network [OSTI]

    T. Blum; Leo Karkkainen

    1993-12-10

    We experiment with adding dynamical gauge field to Kaplan (defect) fermions. In the case of U(1) gauge theory we use an inhomogenous Higgs mechanism to restrict the 3d gauge dynamics to a planar 2d defect. In our simulations the 3d theory produce the correct 2d gauge dynamics. We measure fermion propagators with dynamical gauge fields. They posses the correct chiral structure. The fermions at the boundary of the support of the gauge field (waveguide) are non-chiral, and have a mass two times heavier than the chiral modes. Moreover, these modes cannot be excited by a source at the defect; implying that they are dynamically decoupled. We have also checked that the anomaly relation is fullfilled for the case of a smooth external gauge field. This is an uuencoded ps-file. Use 'uudecode hepchiral.ps.Z' and 'uncompress hepchiral.ps.Z' to produce the psfile.

  11. Assessment and added value estimation of an ensemble approach with a focus on global radiation forecasts

    E-Print Network [OSTI]

    Bouallegue, Zied Ben

    2015-01-01

    The assessment of the high-resolution ensemble weather prediction system COSMO-DE-EPS is achieved with the perspective of using it for renewable energy applications. The performance of the ensemble forecast is explored focusing on global radiation, the main weather variable affecting solar power production, and on quantile forecasts, key probabilistic products for the energy sector. First, the ability of the ensemble system to capture and resolve the observation variability is assessed. Secondly, the potential benefit of the ensemble forecasting strategy compared to a single forecast approach is quantitatively estimated. A new metric called ensemble added value is proposed, aiming at a fair comparison of an ensemble forecast with a single forecast, when optimized to the users' needs. Hourly mean forecasts are verified against pyranometer measurements over verification periods covering 2013. The results show in particular that the added value of the ensemble approach is season-dependent and increases with the ...

  12. AdS$_4$ solutions of massive IIA from dyonic ISO(7) supergravity

    E-Print Network [OSTI]

    Oscar Varela

    2015-09-23

    Explicit formulae are given for the consistent truncation of massive type IIA supergravity on the six-sphere to the SU(3)--invariant sector of $D=4$ ${\\cal N}=8$ supergravity with dyonic ISO(7) gauging. These formulae are then used to construct AdS$_4$ solutions of massive type IIA via uplift on $S^6$ of the critical points of the $D=4$ supergravity with at least SU(3) symmetry. We find a new ${\\cal N}=1$ solution with SU(3) symmetry, a new non-supersymmetric solution with SO(6) symmetry, and recover previously known solutions. We quantise the fluxes, calculate the gravitational free energies of the solutions and discuss the stability of the non-supersymmetric ones. Among these, only a (previously known) G$_2$--invariant solution is found to be stable.

  13. AdS$_4$ solutions of massive IIA from dyonic ISO(7) supergravity

    E-Print Network [OSTI]

    Varela, Oscar

    2015-01-01

    Explicit formulae are given for the consistent truncation of massive type IIA supergravity on the six-sphere to the SU(3)--invariant sector of $D=4$ ${\\cal N}=8$ supergravity with dyonic ISO(7) gauging. These formulae are then used to construct AdS$_4$ solutions of massive type IIA via uplift on $S^6$ of the critical points of the $D=4$ supergravity with at least SU(3) symmetry. We find a new ${\\cal N}=1$ solution with SU(3) symmetry, a new non-supersymmetric solution with SO(6) symmetry, and recover previously known solutions. We quantise the fluxes, calculate the gravitational free energies of the solutions and discuss the stability of the non-supersymmetric ones. Among these, only a (previously known) G$_2$--invariant solution is found to be stable.

  14. Dyonic AdS_4 black hole entropy and attractors via entropy function

    E-Print Network [OSTI]

    Goulart, Prieslei

    2015-01-01

    Using the Sen's entropy function formalism, we compute the entropy for the extremal dyonic black hole solutions of theories in the presence of dilaton field coupled to the field strength and a dilaton potential. We solve the attractor equations analytically and determine the near horizon metric, the value of the scalar fields and the electric field on the horizon, and consequently the entropy of these black holes. The attractor mechanism plays a very important role for these systems, and after studying the simplest systems involving dilaton fields, we propose a general ansatz for the value of the scalar field on the horizon, which allows us to solve the attractor equations for gauged supergravity theories in AdS_4 spaces.

  15. The holographic superconductors in higher-dimensional AdS soliton

    E-Print Network [OSTI]

    Chong Oh Lee

    2012-07-30

    We explore the behaviors of the holographic superconductors at zero temperature for a charged scalar field coupled to a Maxwell field in higher-dimensional AdS soliton spacetime via analytical way. In the probe limit, we obtain the critical chemical potentials increase linearly as a total dimension $d$ grows up. We find that the critical exponent for condensation operator is obtained as 1/2 independently of $d$, and the charge density is linearly related to the chemical potential near the critical point. Furthermore, we consider a slightly generalized setup the Einstein-Power-Maxwell field theory, and find that the critical exponent for condensation operator is given as $1/(4-2n)$ in terms of a power parameter $n$ of the Power-Maxwell field, and the charge density is proportional to the chemical potential to the power of $1/(2-n)$.

  16. Emerging Non-Anomalous Baryonic Symmetries in the AdS_5/CFT_4 Correspondence

    E-Print Network [OSTI]

    Nessi Benishti

    2011-06-06

    We study the breaking of baryonic symmetries in the AdS_5/CFT_4 correspondence for D3 branes at Calabi-Yau three-fold singularities. This leads, for particular VEVs, to the emergence of non-anomalous baryonic symmetries during the renormalization group flow. We claim that these VEVs correspond to critical values of the B-field moduli in the dual supergravity backgrounds. We study in detail the C^3/Z_3 orbifold, the cone over F_0 and the C^3/Z_5 orbifold. For the first two examples, we study the dual supergravity backgrounds that correspond to the breaking of the emerging baryonic symmetries and identify the expected Goldstone bosons and global strings in the infra-red. In doing so we confirm the claim that the emerging symmetries are indeed non-anomalous baryonic symmetries.

  17. Emergent Space and the Example of AdS_5XS^5

    E-Print Network [OSTI]

    Frank Ferrari

    2013-05-06

    We explain how to build field theoretic observables from which the geometrical properties of a dual holographic formulation can be read off straightforwardly. In some cases this construction yields explicit and calculable models of emergent space. We illustrate the idea on the type IIB background generated by N D3-branes in the near horizon limit, for which a full derivation from first principles can be presented. The six transverse dimensions emerge at large N and we find the full AdS_5XS^5 metric and self-dual Ramond-Ramond field strength on the resulting ten dimensional space-time, with the correct radii and quantization law. We briefly discuss possible applications and generalizations.

  18. Conformal Transformations and Strings for an Accelerating Quark-Antiquark Pair in AdS3

    E-Print Network [OSTI]

    Shijong Ryang

    2014-12-08

    From a simple moving open string solution dual to a moving heavy quark with constant velocity in the Poincare AdS_3 spacetime, we construct an accerlerating open string solution dual to a heavy quark-antiquark pair accelerated in opposite directions by performing the three mappings such as the SL(2,R)_L x SL(2,R)_R isometry transformation, the special conformal transformation and the conformal SO(2,2) transformation. Using the string sigma model action we construct two open string solutions staying in two different regions whose dividing line is associated with the event horizon appeared on the string worldsheet and obtain the accelerating open string solution by gluing two such solutions.

  19. Semiclassical Strings in Electric and Magnetic Fields Deformed $AdS_5 \\times S^5$ Spacetimes

    E-Print Network [OSTI]

    Wung-Hong Huang

    2006-01-06

    We first apply the transformation of mixing azimuthal and internal coordinate or mixing time and internal coordinate to the 11D M-theory with a stack N M2-branes to find the spacetime of a stack of N D2-branes with magnetic or electric flux in 10 D IIA string theory, after the Kaluza-Klein reduction. We then perform the T duality to the spacetime to find the background of a stack of N D3-branes with magnetic or electric flux. In the near-horizon limit the background becomes the magnetic or electric field deformed $AdS_5 \\times S^5$. We adopt an ansatz to find the classical string solution which is rotating in the deformed $S^5$ with three angular momenta in the three rotation planes. The relations between the classical string energy and its angular momenta are found and results show that the external magnetic and electric fluxes will increase the string energy. Therefore, from the AdS/CFT point of view, the corrections of the anomalous dimensions of operators in the dual SYM theory will be positive. We also investigate the small fluctuations in these solutions and discuss the effects of magnetic and electric fields on the stability of these classical rotating string solutions. Finally, we find the possible solutions of string pulsating on the deformed spacetimes and show that the corrections to the anomalous dimensions of operators in the dual SYM theory are non-negative.

  20. Lean Product Development: Making Waste Transparent

    E-Print Network [OSTI]

    Bauch, Christoph

    2004-01-15

    Lean manufacturing developed by Toyota is a production philosophy that focuses on streamlining of value added activities and eliminating waste within the process with the goal to better meet customer demand. It constitutes ...

  1. Maximizing the throughput of large ad hoc wireless networks

    E-Print Network [OSTI]

    Hua, Yingbo; Huang, Yi; J, Garcia-Luna-Aceves J

    2006-01-01

    The transport capacity of wireless networks over fadingimprovement of ad hoc wireless networks using directionalThe capacity of wireless networks,” IEEE Trans. Inform.

  2. Programmable surfaces

    E-Print Network [OSTI]

    Sun, Amy (Amy Teh-Yu)

    2012-01-01

    Robotic vehicles walk on legs, roll on wheels, are pulled by tracks, pushed by propellers, lifted by wings, and steered by rudders. All of these systems share the common character of momentum transport across their surfaces. ...

  3. The effect of magnesium added at C{sub 60}/Rubrene heterointerfaces

    SciTech Connect (OSTI)

    Cheng, Chiu-Ping; Lee, Cheng-Wei; Chu, Yu-Ya [Department of Electrophysics, National Chiayi University, Chiayi 60004, Taiwan (China)] [Department of Electrophysics, National Chiayi University, Chiayi 60004, Taiwan (China); Wei, Ching-Hsuan [Department of Material Science, National Chiao-Tung University, Hsinchu 30076, Taiwan (China)] [Department of Material Science, National Chiao-Tung University, Hsinchu 30076, Taiwan (China); Pi, Tun-Wen [National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China)] [National Synchrotron Radiation Research Center, Hsinchu 30076, Taiwan (China)

    2013-12-28

    This study examines the effect of adding magnesium (Mg) at C{sub 60}/rubrene heterointerfaces by using synchrotron-radiation photoemission spectroscopy. The heterointerface was obtained by depositing C{sub 60} on a 4-Å Mg/rubrene surface. The photoemission spectra showed that the added Mg preferentially interacts with and transfers negative charges to C{sub 60}. The interfacial dipole potential was significantly enlarged, as was the separation between the lowest unoccupied molecular orbital of C{sub 60} and the highest occupied molecular orbital of rubrene. The results demonstrate that the addition of Mg should be an effective method for improving the efficiency of light- and current-generating devices.

  4. What's in an ad? Print ads generally have four written parts --headline, support copy, call to action, and company name --plus a strong

    E-Print Network [OSTI]

    Buehrer, R. Michael

    What's in an ad? Print ads generally have four written parts -- headline, support copy, call. Strategy and copy · The most important step is to set a single objective for the ad. Are you featuring to get the attention of your reader. Your ad's headline is often the only part of an ad that is read

  5. Master Thesis Group Key Agreement for Ad Hoc Networks

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Master Thesis Group Key Agreement for Ad Hoc Networks Lijun Liao Date: 06 July 2005 Supervisor: M their financial support. #12;Abstract Over the last 30 years the study of group key agreement has stimulated much present a Tree-based group key agreement Framework for Ad-hoc Networks (TFAN). TFAN is especially suitable

  6. Curriculum Revision REPORT OF AD HOC WORKING GROUP ON

    E-Print Network [OSTI]

    Brown, Sally

    Curriculum Revision REPORT OF AD HOC WORKING GROUP ON CURRICULUM REVISION (November 2002- March (2) Charge to Ad Hoc Working Group on Curriculum.............................. 12 (3) Materials;Curriculum Revision SUMMARY Curriculum transformation at the College of Forest Resources (CFR) is a response

  7. Transmission capacity of CDMA ad hoc networks Steven Weber

    E-Print Network [OSTI]

    de Veciana, Gustavo

    Transmission capacity of CDMA ad hoc networks Steven Weber Dept. of ECE Drexel University and tolerate co-located simultaneous transmissions. We develop analytic results on the transmission capacity of a CDMA ad hoc network. Transmission capacity is defined as the maximum permissible density

  8. Optimum Transmission Range for Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Deng, Jing

    Optimum Transmission Range for Wireless Ad Hoc Networks Jing Deng Dept. of EECS Syracuse Univ-- The transmission range that achieves the most economical use of energy in wireless ad hoc networks is studied under homogeneous node distribution. By as- suming the knowledge of node location, we first proposed a transmission

  9. Brief Contributions________________________________________________________________________________ Topology Control of Ad Hoc Wireless

    E-Print Network [OSTI]

    Poon, Chung Keung

    ________________________________________________________________________________ Topology Control of Ad Hoc Wireless Networks for Energy Efficiency Maggie X. Cheng, Member, IEEE, Mihaela of each wireless node such that the resulting network is connected and the total energy consumption the theoretical analysis. Index Terms--Multihop, ad hoc, wireless networks, energy efficiency, transmission power

  10. Improving the Battery Performance of Ad-Hoc Routing Protocols

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    Improving the Battery Performance of Ad-Hoc Routing Protocols Q. Qi and C. Chakrabarti Department-- In ad-hoc networks formed by battery powered nodes, the network lifetime can be significantly enhanced by incorporateing the battery properties in the routing protocol. In this paper, we propose such a routing mechanism

  11. EuroSPI 2009 -1 Software provides an increasing part of the added value of modern automation systems and

    E-Print Network [OSTI]

    SPI 2009 1 Introduction Software-intensive automation systems, like industrial manufacturing plants, need automation systems and thus becomes more complex. System requirements may change even late in the development process, lead to ad-hoc modifications of the product and require systematic (and automated) testing

  12. Projection from Yang-Mills Geometry to AdS Space

    E-Print Network [OSTI]

    B. E. Eichinger

    2015-01-22

    The geometry that yields the gauge potential and curvature form of Yang-Mills theory is known to be $Sp(2)/Sp(1)\\times Sp(1)\\sim S^4$. The projective metric for this space will be constructed and the curvature tensor will be shown to consist of both self-dual and anti-self-dual components. In the central projection, one hemisphere of $S^4$ is mapped onto the other, such that one hemisphere, excluding the equator, is equivalent to a four dimensional ball. This enables a mapping between the compact geometry of YM theory and relativity, with the double cover of the equator mapping to infinity in the anti-de Sitter (AdS) space. By interpreting the YM geometry (instanton) as the space of interactions between two particles it is suggested that the $Sp(2)/Sp(1)\\times Sp(1)$ YM quaternionic geometry can be generalized to $n$ fermions, each having an $Sp(1)\\sim SU(2)$ gauge group.

  13. Emergent AdS3 and BTZ Black Hole from Weakly Interacting Hot 2d CFT

    E-Print Network [OSTI]

    Soo-Jong Rey; Yasuaki Hikida

    2006-05-02

    We investigate emergent holography of weakly coupled two-dimensional hyperK\\"ahler sigma model on cotangent bundle of (N-1)-dimensional complex projective space at zero and finite temperature. The sigma model is motivated by the spacetime conformal field theory dual to the near-horizon geometry of Q1 D1-brane bound to Q5 D5-brane wrapped on four-torus times circle, where N = Q1*Q5. The sigma model admits nontrivial instanton for all N greater than or equal to 2, which serves as a local probe of emergent holographic spacetime. We define emergent geometry of the spacetime as that of instanton moduli space via Hitchin's information metric. At zero temperature, we find that emergent geometry is AdS3. At finite temperature, time-periodic instanton is mappable to zero temperature instanton via conformal transformation. Utilizing the transformation, we show that emergent geometry is precisely that of the non-extremal, non-rotating BTZ black hole.

  14. New Formulation of the Type IIB Superstring Action in $AdS_5 \\times S^5$

    E-Print Network [OSTI]

    John H. Schwarz

    2015-06-25

    Previous studies of the type IIB superstring in an ${AdS_5 \\times S^5}$ background are based on a description of the superspace geometry as the quotient space $PSU(2,2|4)/SO(4,1) \\times SO(5)$. This paper develops an alternative approach in which the Grassmann coordinates provide a nonlinear realization of $PSU(2,2|4)$ based on the quotient space $PSU(2,2|4)/SU(2,2) \\times SU(4)$, and the bosonic coordinates are described as a submanifold of $SU(2,2) \\times SU(4)$. This formulation keeps all bosonic symmetries manifest, and it provides the complete dependence on the Grassmann coordinates in terms of simple analytic expressions. It is used to construct the superstring world-sheet action in a form in which the $PSU(2,2|4)$ symmetry is manifest and kappa symmetry can be established. This formulation might have some advantages compared to previous ones, but this remains to be demonstrated.

  15. Ethyl Alcohol Production

    E-Print Network [OSTI]

    O'Neal, Henry

    1981-01-01

    is added to and mixed with 150 gallons of water (12 gallons per bushel) at 120 degrees F. This begins the cooking process, during which the grain mixture or mash is constantly agitated. A liquefying enzyme (Taka Therm by Miles Laboratories Inc... exchanger is disposed of as waste water. However, it could be stored, cooled and used again as cooling water for the heat exchanger. Heat exchanger water use was determined from January through April production batches. Water use increases during summer...

  16. Characteristic length of an AdS/CFT superconductor

    E-Print Network [OSTI]

    Kengo Maeda; Takashi Okamura

    2008-10-30

    We investigate in more detail the holographic model of a superconductor recently found by Hartnoll, Herzog, and Horowitz [Phys. Rev. Lett. 101, 031601], which is constructed from a condensate of a charged scalar field in AdS_4-Schwarzschild background. By analytically studying the perturbation of the gravitational system near the critical temperature T_c, we obtain the superconducting coherence length proportional to 1/\\sqrt{1-T/T_c} via AdS/CFT correspondence. By adding a small external homogeneous magnetic field to the system, we find that a stationary diamagnetic current proportional to the square of the order parameter is induced by the magnetic field. These results agree with Ginzburg-Landau theory and strongly support the idea that a superconductor can be described by a charged scalar field on a black hole via AdS/CFT duality.

  17. New $AdS_3 \\times S^2$ T-duals with $\\mathcal{N} = (0,4)$ supersymmetry

    E-Print Network [OSTI]

    Lozano, Yolanda; Montero, Jesús; Colgáin, Eoin Ó

    2015-01-01

    It is well known that Hopf-fibre T-duality and uplift takes the D1-D5 near-horizon into a class of $AdS_3 \\times S^2$ geometries in 11D where the internal space is a Calabi-Yau three-fold. Moreover, supersymmetry dictates that Calabi-Yau is the only permissible $SU(3)$-structure manifold. Generalising this duality chain to non-Abelian isometries, a strong parallel exists, resulting in the first explicit example of a class of $AdS_3 \\times S^2$ geometries with $SU(2)$-structure. Furthermore, the non-Abelian T-dual of $AdS_3 \\times S^3 \\times S^3 \\times S^1$ results in a new supersymmetric $AdS_3 \\times S^2$ geometry, which falls outside of all known classifications. We explore the basic properties of the holographic duals associated to the new backgrounds. We compute the central charges and show that they are compatible with a large $\\mathcal{N}=4$ superconformal algebra in the infra-red.

  18. New $AdS_3 \\times S^2$ T-duals with $\\mathcal{N} = (0,4)$ supersymmetry

    E-Print Network [OSTI]

    Yolanda Lozano; Niall T. Macpherson; Jesús Montero; Eoin Ó Colgáin

    2015-07-09

    It is well known that Hopf-fibre T-duality and uplift takes the D1-D5 near-horizon into a class of $AdS_3 \\times S^2$ geometries in 11D where the internal space is a Calabi-Yau three-fold. Moreover, supersymmetry dictates that Calabi-Yau is the only permissible $SU(3)$-structure manifold. Generalising this duality chain to non-Abelian isometries, a strong parallel exists, resulting in the first explicit example of a class of $AdS_3 \\times S^2$ geometries with $SU(2)$-structure. Furthermore, the non-Abelian T-dual of $AdS_3 \\times S^3 \\times S^3 \\times S^1$ results in a new supersymmetric $AdS_3 \\times S^2$ geometry, which falls outside of all known classifications. We explore the basic properties of the holographic duals associated to the new backgrounds. We compute the central charges and show that they are compatible with a large $\\mathcal{N}=4$ superconformal algebra in the infra-red.

  19. Adding value to coal conversion`s char: A strategy for lower-priced fuels

    SciTech Connect (OSTI)

    Kruse, C.W. [Illinois State Geological Survey, Champaign, IL (United States); Fatemi, M. [Amoco Corporation, Naperville, IL (United States); Feizoulof, C. [Univ. of Illinois, Urbana, IL (United States)

    1994-12-31

    Coal`s low hydrogen to carbon ratio gives coal physical properties that are not the most desired in fuel markets. The problem is dealt with in conversion technologies designed to upgrade coal to more desirable fuels by either: (1) chemically adding hydrogen, as in liquefaction or high-BTU gasification, or (2) the production of char, as in mild gasification. The first option is neither cost-effective nor environmentally sound. Liquefaction results in the production of one mole of carbon dioxide for each mole of hydrogen needed. The result is that despite the preferred hydrogen to carbon ratio in the fuel, carbon dioxide is produced in greater quantities than it would be by simply burning the coal. The depressed market value of char is the primary drawback of coal utilization technologies exercising the second option. Making value-added, non-fuel products from char could significantly improve the economics of overall operations and result in competitively-priced premium hydrocarbon fuels. The research goal of a growing number of groups, including ours, is to produce and describe carbon products which will command higher prices than the carbon (coal) from which they were produced.

  20. MODIFICATION OF SURFACE AND TRIBOLOGICAL PROPERTIES OF DLC FILMS BY ADDING SILVER CONTENT

    E-Print Network [OSTI]

    Zhang, Hanshen S.

    2008-01-01

    plastic shearing (plowing) effect increases and the COF becomes more dependent on the materials properties

  1. MODIFICATION OF SURFACE AND TRIBOLOGICAL PROPERTIES OF DLC FILMS BY ADDING SILVER CONTENT

    E-Print Network [OSTI]

    Zhang, Hanshen S.

    2008-01-01

    Sidewall Adhesion in Microelectromechanical System,’ Journalof Microelectromechanical Systems 14, pp. 1356-1363.Journal of Microelectromechanical Systems. 15, pp. 1612- [

  2. MODIFICATION OF SURFACE AND TRIBOLOGICAL PROPERTIES OF DLC FILMS BY ADDING SILVER CONTENT

    E-Print Network [OSTI]

    Zhang, Hanshen S.

    2008-01-01

    of Sidewall Adhesion in Microelectromechanical System,’Journal of Microelectromechanical Systems 14, pp. 1356-1363.Interfaces of Microelectromechanical Devices,” Journal of

  3. arXiv:hep-th/0204081v422Jan2003 On the Geometry and Mass of Static, Asymptotically AdS

    E-Print Network [OSTI]

    Galloway, Greg

    arXiv:hep-th/0204081v422Jan2003 On the Geometry and Mass of Static, Asymptotically AdS Spacetimes, and the Uniqueness of the AdS Soliton G.J. Gallowaya , S. Suryab,c , E. Woolgarc,b a Dept. of Mathematics, University theorem is a unique- ness theorem for the negative mass AdS soliton spacetime. This result lends support

  4. Boundary values of mixed-symmetry massless fields in AdS space

    E-Print Network [OSTI]

    Chekmenev, Alexander

    2015-01-01

    We elaborate on the ambient space approach to boundary values of $AdS_{d+1}$ gauge fields and apply it to massless fields of mixed-symmetry type. In the most interesting case of odd-dimensional bulk the respective leading boundary values are conformal gauge fields subject to the invariant equations. As a byproduct our approach gives a manifestly conformal and gauge covariant formulation for these fields. Although such formulation employs numerous auxiliary fields, it comes with a systematic procedure for their elimination that results in a more concise formulation involving only a reasonable set of auxiliaries, which eventually (at least in principle) can be reduced to the minimal formulation in terms of the irreducible Lorentz tensors. The simplest mixed-symmetry field, namely, the rank-3 tensor associated to the two-row Young diagram, is considered in some details.

  5. On Surface Approximation using Developable Surfaces

    E-Print Network [OSTI]

    Lee, In-Kwon

    manufacturing, e.g. in shipbuilding. Keywords: computer aided design, computer aided manufacturing, surface ap- proximation, reverse engineering, surface of revolution, developable surface, shipbuilding. 2 #12

  6. Noncommutative Extension of AdS-CFT and Holographic Superconductors

    E-Print Network [OSTI]

    Souvik Pramanik; Sudipta Das; Subir Ghosh

    2015-02-13

    In this Letter, we consider a Non-Commutative (NC) extension of AdS-CFT correspondence and its effects on holographic superconductors. NC corrections are incorporated via the NC generalization of Schwarzschild black hole metric in AdS with the probe limit. We study NC effects on the relations connecting the charge density and the critical temperature of the Holographic Superconductors. Furthermore, condensation operator of the superconductor has been analyzed. Our results suggest that generically, NC effects increase the critical temperature of the holographic superconductor.

  7. Investigating AdS/QCD duality through scalar glueball correlators

    E-Print Network [OSTI]

    P. Colangelo; F. De Fazio; F. Jugeau; S. Nicotri

    2009-09-03

    We investigate AdS/QCD duality for the two-point correlation function of the lowest dimension scalar glueball operator, in the case of the IR soft wall model. We point out the role of the boundary conditions for the bulk-to-boundary propagator in determining the gluon condensates. We show that a low energy QCD theorem can be obtained within the AdS approach, together with a gluon condensate close to the commonly accepted value and robust against perturbation of the background dilaton field.

  8. Towards a consistent AdS/QCD dictionary

    E-Print Network [OSTI]

    Frederic Jugeau

    2009-03-01

    This note focuses on the large-N behaviour of the Hard Wall model of QCD and clarifies the AdS/QCD dictionary formulated on the basis of the AdS/CFT correspondence. It is shown how short-distance studies performed in the framework of the AdS/QCD Soft Wall model allow one to determine unambiguously the chiral symmetry breaking function in the Hard Wall model. Especially, the different forms of the field/operator prescription are emphasized. The large-N behaviour of the Hard Wall model is then checked considering the vector and gravitational form factors of the pion in the chiral limit.

  9. Thermodynamics of Charged AdS Black Holes in Extended Phases Space via M2-branes Background

    E-Print Network [OSTI]

    Chabab, M; Masmar, K

    2015-01-01

    Motivated by a recent work on asymptotically Ad$S_4$ black holes in M-theory, we investigate both thermodynamics and thermodynamical geometry of Raissner-Nordstrom-AdS black holes from M2-branes. More precisely, we study AdS black holes in $AdS_{4}\\times S^{7}$, with the number of M2-branes interpreted as a thermodynamical variable. In this context, we calculate various thermodynamical quantities including the chemical potential, and examine their phase transitions along with the corresponding stability behaviors. In addition, we also evaluate the thermodynamical curvatures of the Weinhold, Ruppeiner and Quevedo metrics for M2-branes geometry to study the stability of such black object. We show that the singularities of these scalar curvature's metrics reproduce similar stability results obtained by the phase transition program via the heat capacities in different ensembles either when the number of the M2 branes or the charge are held fixed. Also, we note that all results derived in [1] are recovered in the ...

  10. Context-Aware Protocol Engines for  Ad Hoc Networks

    E-Print Network [OSTI]

    Garcia-Luna-Aceves, J.J.

    2009-01-01

    Context-Aware Protocol Engines for Ad Hoc Networks J. J.we call a context-aware protocol engine. With a CAPE, nodesthe context-aware protocol engine (CAPE) as an instantiation

  11. Ad-nilpotent ideals of complex and real reductive groups

    E-Print Network [OSTI]

    Fang, Chuying

    2007-01-01

    In this thesis, we study ad-nilpotent ideals and its relations with nilpotent orbits, affine Weyl groups, sign types and hyperplane arrangements. This thesis is divided into three parts. The first and second parts deal ...

  12. Truthful resource management in wireless ad hoc networks 

    E-Print Network [OSTI]

    Cai, Jianfeng

    2005-11-01

    In wireless mobile ad hoc networks (MANETs), cooperation cannot be an im- plicit assumption anymore. Each profit-oriented network node has the intention to be selfish due to limited resource possession. In this dissertation, we investigate...

  13. Topping Turbines: Adding New Life to Older Plants 

    E-Print Network [OSTI]

    Cadrecha, M.

    1984-01-01

    An existing power plant can be repowered at a modest investment cost through a topping turbine installation. Essentially, this consists of replacing the existing old, low pressure boilers with new, high pressure boilers and adding a new, high...

  14. Mobilized ad-hoc networks: A reinforcement learning approach

    E-Print Network [OSTI]

    Chang, Yu-Han

    2003-12-04

    Research in mobile ad-hoc networks has focused on situations in which nodes have no control over their movements. We investigate an important but overlooked domain in which nodes do have control over their movements. ...

  15. Fighting Online Click-Fraud Using Bluff Ads

    E-Print Network [OSTI]

    Haddadi, Hamed

    2010-01-01

    Online advertising is currently the greatest source of revenue for many Internet giants. The increased number of specialized websites and modern profiling techniques, have all contributed to an explosion of the income of ad brokers from online advertising. The single biggest threat to this growth, is however, click-fraud. Trained botnets and even individuals are hired by click-fraud specialists in order to maximize the revenue of certain users from the ads they publish on their websites, or to launch an attack between competing businesses. In this note we wish to raise the awareness of the networking research community on potential research areas within this emerging field. As an example strategy, we present Bluff ads; a class of ads that join forces in order to increase the effort level for click-fraud spammers. Bluff ads are either targeted ads, with irrelevant display text, or highly relevant display text, with irrelevant targeting information. They act as a litmus test for the legitimacy of the individual...

  16. An Eta Primer: Solving the U(1) Problem with AdS/QCD

    E-Print Network [OSTI]

    Emanuel Katz; Matthew D Schwartz

    2007-10-02

    Inspired by the AdS/CFT correspondence, we study the pseudoscalar mesons of QCD through a dual embedding in a strongly curved extra dimensional spacetime. This model incorporates the consequences of symmetry and has very few free parameters, due to constraints from five-dimensions and the operator product expansion of QCD. Using as inputs the pion, kaon, and rho masses and fpi, we compute the eta and eta prime masses to be 520 and 867 MeV, respectively. Their decay rates into photons are also computed and found to be in good agreement with data.

  17. Chaotic strings in a near Penrose limit of AdS$_5\\times T^{1,1}$

    E-Print Network [OSTI]

    Yuhma Asano; Daisuke Kawai; Hideki Kyono; Kentaroh Yoshida

    2015-07-17

    We study chaotic motions of a classical string in a near Penrose limit of AdS$_5\\times T^{1,1}$. It is known that chaotic solutions appear on $R\\times T^{1,1}$, depending on initial conditions. It may be interesting to ask whether the chaos persists even in Penrose limits or not. In this paper, we show that sub-leading corrections in a Penrose limit provide an unstable separatrix, so that chaotic motions are generated as a consequence of collapsed Kolmogorov-Arnold-Moser (KAM) tori. Our analysis is based on deriving a reduced system composed of two degrees of freedom by supposing a winding string ansatz. Then, we provide support for the existence of chaos by computing Poincare sections. In comparison to the AdS$_5\\times T^{1,1}$ case, we argue that no chaos lives in a near Penrose limit of AdS$_5\\times$S$^5$, as expected from the classical integrability of the parent system.

  18. Pocked surface neutron detector

    DOE Patents [OSTI]

    McGregor, Douglas (Whitmore Lake, MI); Klann, Raymond (Bolingbrook, IL)

    2003-04-08

    The detection efficiency, or sensitivity, of a neutron detector material such as of Si, SiC, amorphous Si, GaAs, or diamond is substantially increased by forming one or more cavities, or holes, in its surface. A neutron reactive material such as of elemental, or any compound of, .sup.10 B, .sup.6 Li, .sup.6 LiF, U, or Gd is deposited on the surface of the detector material so as to be disposed within the cavities therein. The portions of the neutron reactive material extending into the detector material substantially increase the probability of an energetic neutron reaction product in the form of a charged particle being directed into and detected by the neutron detector material.

  19. AdS/CFT and Exclusive Processes in QCD

    E-Print Network [OSTI]

    Stanley J. Brodsky; Guy F. de Teramond

    2007-09-13

    The AdS/CFT correspondence between string theory in AdS space and conformal field theories in physical space-time leads to an analytic, semi-classical model for strongly-coupled QCD which has scale invariance and dimensional counting at short distances and color confinement at large distances. One can use holography to map the amplitude describing the hadronic state in the fifth dimension of Anti-de Sitter space to the light-front wavefunctions of hadrons in physical space-time, thus providing a relativistic description of hadrons in QCD at the amplitude level. In particular, we show that there is an exact correspondence between the fifth-dimensional coordinate of AdS space z and a specific impact variable zeta which measures the separation of the quark and gluonic constituents within the hadron in ordinary space-time. New relativistic light-front equations in ordinary space-time can then be derived which reproduce the results obtained using the 5-dimensional theory. The effective light-front equations possess elegant algebraic structures and integrability properties. This connection between the AdS and the light-front representations allows one to compute the analytic form of the frame-independent light-front wavefunctions, the fundamental entities which encode hadron properties and allow the computation of decay constants, form factors, deeply virtual Compton scattering, exclusive heavy hadron decays and other exclusive scattering amplitudes. As specific examples we compute the pion coupling constant and study the behavior of the pion form factor in the space and time-like regions. We also determine the Dirac form factors of the proton and neutron in the space-like region.

  20. Comments on Cosmic Censorship in AdS/CFT

    SciTech Connect (OSTI)

    Hubeny, Veronika E.; Liu, Xiao; Rangamani, Mukund; Shenker, Stephen

    2004-03-21

    Recently Hertog, Horowitz, and Maeda (HHM) (hep-th/0310054) have proposed that cosmic censorship can be violated in the AdS/CFT context. They argue that for certain initial data there is insufficient energy available to make a black hole whose horizon is big enough to cloak the singularity that forms. We have investigated this proposal in the models HHM discuss and have thus far been unable to find initial data that provably satisfy this criterion, despite our development of an improved lower bound on the size of the singular region. This is consistent with recent numerical results (hep-th/0402109). For certain initial data, the energies of our configurations are not far above the lower bound on the requisite black hole mass, and so it is possible that in the exact time development naked singularities do form. We go on to argue that the finite radius cut-off AdS_5 situation discussed by HHM displays instabilities when the full 10D theory is considered. We propose an AdS_3 example that may well be free of this instability.

  1. Comments on Cosmic Censorship in AdS/CFT

    SciTech Connect (OSTI)

    Hubeny, V.

    2004-04-06

    Recently Hertog, Horowitz, and Maeda (HHM) (hep-th/0310054) have proposed that cosmic censorship can be violated in the AdS/CFT context. They argue that for certain initial data there is insufficient energy available to make a black hole whose horizon is big enough to cloak the singularity that forms. We have investigated this proposal in the models HHM discuss and have thus far been unable to find initial data that provably satisfy this criterion, despite our development of an improved lower bound on the size of the singular region. This is consistent with recent numerical results (hep-th/0402109). For certain initial data, the energies of our configurations are not far above the lower bound on the requisite black hole mass, and so it is possible that in the exact time development naked singularities do form. We go on to argue that the finite radius cut-off AdS5 situation discussed by HHM displays instabilities when the full 10D theory is considered. We propose an AdS3 example that may well be free of this instability.

  2. ADS-B benefits to general aviation and barriers to implementation

    E-Print Network [OSTI]

    Kunzi, Fabrice

    2011-01-01

    Automatic Dependent Surveillance - Broadcast (ADS-B) will be the basis of the future surveillance system in the US. To achieve benefit from ADS-B, aircraft have to be equipped with ADS-B avionics across all stakeholders. ...

  3. Topology Control Protocols to Conserve Energy in Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Xu, Ya; Bien, Solomon; Mori, Yutaka; Heidemann, John; Estrin, D

    2003-01-01

    Protocols to Conserve Energy in Wireless Ad Hoc Networks YaL. Tassiulas. Energy conserving routing in wireless ad-hocAdaptive Energy Conservation Protocols for Wireless Ad Hoc

  4. Pottery Production

    E-Print Network [OSTI]

    Nicholson, Paul T.

    2009-01-01

    Paul T. Nicholson. ) Pottery Production, Nicholson, UEE 2009Short Citation: Nicholson 2009, Pottery Production. UEE.Paul T. , 2009, Pottery Production. In Willeke Wendrich (

  5. Cordage Production

    E-Print Network [OSTI]

    Veldmeijer, André J.

    2009-01-01

    294: fig. 15-3). Cordage Production, Veldmeijer, UEE 2009Short Citation: Veldmeijer, 2009, Cordage Production. UEE.André J. , 2009, Cordage Production. In Willeke Wendrich (

  6. Glass Production

    E-Print Network [OSTI]

    Shortland, Andrew

    2009-01-01

    40, pp. 162 - 186. Glass Production, Shortland, UEE 2009AINES Short Citation: Shortland 2009, Glass Production. UEE.Andrew, 2009, Glass Production. In Willeke Wendrich (ed. ),

  7. Four methods for determining the composition of trace radioactive surface contamination of low-radioactivity metal

    E-Print Network [OSTI]

    H. M. O'Keeffe; T. H. Burritt; B. T. Cleveland; G. Doucas; N. Gagnon; N. A. Jelley; C. Kraus; I. T. Lawson; S. Majerus; S. R. McGee; A. W. Myers; A. W. P. Poon; K. Rielage; R. G. H. Robertson; R. C. Rosten; L. C. Stonehill; B. A. VanDevender; T. D. Van Wechel

    2011-03-29

    Four methods for determining the composition of low-level uranium- and thorium-chain surface contamination are presented. One method is the observation of Cherenkov light production in water. In two additional methods a position-sensitive proportional counter surrounding the surface is used to make both a measurement of the energy spectrum of alpha particle emissions and also coincidence measurements to derive the thorium-chain content based on the presence of short-lived isotopes in that decay chain. The fourth method is a radiochemical technique in which the surface is eluted with a weak acid, the eluate is concentrated, added to liquid scintillator and assayed by recording beta-alpha coincidences. These methods were used to characterize two `hotspots' on the outer surface of one of the He-3 proportional counters in the Neutral Current Detection array of the Sudbury Neutrino Observatory experiment. The methods have similar sensitivities, of order tens of ng, to both thorium- and uranium-chain contamination.

  8. Final report for the project "Improving the understanding of surface-atmosphere radiative interactions by mapping surface reflectance over the ARM CART site" (award DE-FG02-02ER63351)

    SciTech Connect (OSTI)

    Alexander P. Trishchenko; Yi Luo; Konstantin V. Khlopenkov, William M. Park; Zhanqing Li; Maureen Cribb

    2008-11-28

    Surface spectral reflectance (albedo) is a fundamental variable affecting the transfer of solar radiation and the Earth’s climate. It determines the proportion of solar energy absorbed by the surface and reflected back to the atmosphere. The International Panel on Climate Change (IPCC) identified surface albedo among key factors influencing climate radiative forcing. Accurate knowledge of surface reflective properties is important for advancing weather forecasting and climate change impact studies. It is also important for determining radiative impact and acceptable levels of greenhouse gases in the atmosphere, which makes this work strongly linked to major scientific objectives of the Climate Change Research Division (CCRD) and Atmospheric Radiation Measurement (ARM) Program. Most significant accomplishments of eth project are listed below. I) Surface albedo/BRDF datasets from 1995 to the end of 2004 have been produced. They were made available to the ARM community and other interested users through the CCRS public ftp site ftp://ftp.ccrs.nrcan.gc.ca/ad/CCRS_ARM/ and ARM IOP data archive under “PI data Trishchenko”. II) Surface albedo properties over the ARM SGP area have been described for 10-year period. Comparison with ECMWF data product showed some deficiencies in the ECMWF surface scheme, such as missing some seasonal variability and no dependence on sky-conditions which biases surface energy budget and has some influence of the diurnal cycle of upward radiation and atmospheric absorption. III) Four surface albedo Intensive Observation Period (IOP) Field Campaigns have been conducted for every season (August, 2002, May 2003, February 2004 and October 2004). Data have been prepared, documented and transferred to ARM IOP archive. Nine peer-reviewed journal papers and 26 conference papers have been published.

  9. A Theoretical Study of the Reaction Mechanism and Product Branching Ratios of C2H + C2H4 and Related Reactions on the C4H5 Potential Energy Surface

    E-Print Network [OSTI]

    Kaiser, Ralf I.

    (T)/cc-pVQZ//B3LYP/6-311G** calculations of various stationary points on the C4H5 global potential energy surface and Related Reactions on the C4H5 Potential Energy Surface Sergey P. Krishtal and Alexander M. Mebel and absorb solar irradiation preventing Titan's atmosphere from heating up and, thus, being one

  10. 1 ADS1210, 1211 24-Bit ANALOG-TO-DIGITAL CONVERTER

    E-Print Network [OSTI]

    Hochmuth, Olaff

    ® 1 ADS1210, 1211 ® ADS1210 ADS1211 24-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES q DELTA-SIGMA A/D-OFF FREQUENCY UP TO 15.6kHz q INTERNAL/EXTERNAL REFERENCE q ON CHIP SELF-CALIBRATION q ADS1211 INCLUDES 4 CHANNEL MUX DESCRIPTION The ADS1210 and ADS1211 are precision, wide dynamic range, delta-sigma analog

  11. No-carrier-added [1.sup.11 c]putrescine

    DOE Patents [OSTI]

    McPherson, Daniel W. (Baltimore, MD); Fowler, Joanna S. (Bellport, NY); Wolf, Alfred P. (Setauket, NY)

    1989-01-01

    The invention relates to a new radiolabeled imaging agent, no-carrier-added [1-.sup.11 C]putrescine, and to the use of this very pure material as a radiotracer with positron emission tomography for imaging brain tumors. The invention further relates to the synthesis of no-carrier-added [1-.sup.11 C]putrescine based on the Michael addition of potassium .sup.11 C-labeled cyanide to acrylonitrile followed by reduction of the .sup.11 C-labeled dinitrile. The new method is rapid and efficient and provides radiotracer with a specific activity greater than 1.4 curies per millimol and in a purity greater than 95%.

  12. Nucleon and flavor form factors in AdS/QCD

    E-Print Network [OSTI]

    Chakrabarti, Dipankar

    2013-01-01

    The electromagnetic form factors for the nucleons are related with the GPDs by sum rules. Using the sum rules we calculate the valence GPDs for $u$ and $d$ quarks in a quark model using the lightfront wavefunctions for the nucleons obtained from AdS/QCD. The flavor decompositions of the nucleon form factors are also calculated from the GPDs in this model. We show that the nucleon form factors and their flavor decompositions calculated in AdS/QCD are in agreement with experimental data.

  13. The Capacityand Energy Efficiency of Wireless Ad Hoc Networks with MultipacketReception

    E-Print Network [OSTI]

    Garcia-Luna-Aceves, J.J.

    2008-01-01

    per-joule capacity of energy-limited wireless networks. IEEECapacity and Energy Efficiency of Wireless Ad Hoc Networksplexity, and energy efficiency in random wireless ad hoc

  14. Defining the role of elastic lubricants and micro textured surfaces in lubricated, sliding friction

    E-Print Network [OSTI]

    Hupp, Sara J. (Sara Jean), 1979-

    2008-01-01

    Solutions for reducing friction in sliding, lubricated systems include modifying lubricant rheology using polymers and adding a micro-scale texture to the sliding surfaces, but the mechanism of how lubrication properties ...

  15. Cell Adhesion on Polyelectrolyte Multilayer Coated Polydimethylsiloxane Surfaces with Varying Topographies

    E-Print Network [OSTI]

    Lee, Ilsoon

    Cell Adhesion on Polyelectrolyte Multilayer Coated Polydimethylsiloxane Surfaces with Varying to the pattern size and pitch influences cell adhesion and proliferation. Extensive research has shown substrate for cell ad- hesion. To improve adhesion, we built polyelectrolyte multilayers (PEMs) on PDMS

  16. The Effects of Great Plains Irrigation on the Surface Energy Balance, Regional Circulation, and Precipitation

    E-Print Network [OSTI]

    Huber, David B.; Brunsell, Nathaniel A.; Mechem, David B.

    2014-05-05

    Irrigation provides a needed source of water in regions of low precipitation. Adding water to a region that would otherwise see little natural precipitation alters the partitioning of surface energy fluxes, the evolution ...

  17. Surface rheology and interface stability.

    SciTech Connect (OSTI)

    Yaklin, Melissa A.; Cote, Raymond O.; Moffat, Harry K.; Grillet, Anne Mary; Walker, Lynn; Koehler, Timothy P.; Reichert, Matthew D.; Castaneda, Jaime N.; Mondy, Lisa Ann; Brooks, Carlton, F.

    2010-11-01

    We have developed a mature laboratory at Sandia to measure interfacial rheology, using a combination of home-built, commercially available, and customized commercial tools. An Interfacial Shear Rheometer (KSV ISR-400) was modified and the software improved to increase sensitivity and reliability. Another shear rheometer, a TA Instruments AR-G2, was equipped with a du Nouey ring, bicone geometry, and a double wall ring. These interfacial attachments were compared to each other and to the ISR. The best results with the AR-G2 were obtained with the du Nouey ring. A Micro-Interfacial Rheometer (MIR) was developed in house to obtain the much higher sensitivity given by a smaller probe. However, it was found to be difficult to apply this technique for highly elastic surfaces. Interfaces also exhibit dilatational rheology when the interface changes area, such as occurs when bubbles grow or shrink. To measure this rheological response we developed a Surface Dilatational Rheometer (SDR), in which changes in surface tension with surface area are measured during the oscillation of the volume of a pendant drop or bubble. All instruments were tested with various surfactant solutions to determine the limitations of each. In addition, foaming capability and foam stability were tested and compared with the rheology data. It was found that there was no clear correlation of surface rheology with foaming/defoaming with different types of surfactants, but, within a family of surfactants, rheology could predict the foam stability. Diffusion of surfactants to the interface and the behavior of polyelectrolytes were two subjects studied with the new equipment. Finally, surface rheological terms were added to a finite element Navier-Stokes solver and preliminary testing of the code completed. Recommendations for improved implementation were given. When completed we plan to use the computations to better interpret the experimental data and account for the effects of the underlying bulk fluid.

  18. Non-extended phase space thermodynamics of Lovelock AdS black holes in grand canonical ensemble

    E-Print Network [OSTI]

    Jie-Xiong Mo; Wen-Biao Liu

    2015-03-06

    Recently, extended phase space thermodynamics of Lovelock AdS black holes has been of great interest. To provide insight from a different perspective and gain a unified phase transition picture, non-extended phase space thermodynamics of $(n+1)$-dimensional charged topological Lovelock AdS black holes is investigated detailedly in the grand canonical ensemble. Specifically, the specific heat at constant electric potential is calculated and phase transition in the grand canonical ensemble is discussed. To probe the impact of the various parameters, we utilize the control variate method and solve the phase transition condition equation numerically for the case $k=1,-1$. There are two critical points for the case $n=6,k=1$ while there is only one for other cases. For $k=0$, there exists no phase transition point. To figure out the nature of phase transition in the grand canonical ensemble, we carry out an analytic check of the analog form of Ehrenfest equations proposed by Banerjee et al. It is shown that Lovelock AdS black holes in the grand canonical ensemble undergo a second order phase transition. To examine the phase structure in the grand canonical ensemble, we utilize the thermodynamic geometry method and calculate both the Weinhold metric and Ruppeiner metric. It is shown that for both analytic and graphical results that the divergence structure of the Ruppeiner scalar curvature coincides with that of the specific heat. Our research provides one more example that Ruppeiner metric serves as a wonderful tool to probe the phase structures of black holes.

  19. Culturing photosynthetic bacteria through surface plasmon resonance

    SciTech Connect (OSTI)

    Ooms, Matthew D.; Bajin, Lauren; Sinton, David

    2012-12-17

    In this work, cultivation of photosynthetic microbes in surface plasmon enhanced evanescent fields is demonstrated. Proliferation of Synechococcus elongatus was obtained on gold surfaces excited with surface plasmons. Excitation over three days resulted in 10 {mu}m thick biofilms with maximum cell volume density of 20% vol/vol (2% more total accumulation than control experiments with direct light). Collectively, these results indicate the ability to (1) excite surface-bound cells using plasmonic light fields, and (2) subsequently grow thick biofilms by coupling light from the surface. Plasmonic light delivery presents opportunities for high-density optofluidic photobioreactors for microalgal analysis and solar fuel production.

  20. BRST-BV approach to massless fields adapted to AdS/CFT correspondence

    E-Print Network [OSTI]

    R. R. Metsaev

    2015-08-31

    Using BRST-BV formulation of relativistic dynamics, arbitrary spin massless and massive field propagating in flat space and arbitrary spin massless fields propagating in AdS space are considered. For such fields, BRST-BV Lagrangians invariant under gauge transformations are obtained. The Lagrangians and gauge transformations are built in terms of traceless gauge fields and traceless gauge transformation parameters. The use of the Poincare parametrization of AdS space allows us to get simple BRST-BV Lagrangian for AdS fields. By imposing the Siegel gauge condition, we get gauge-fixed Lagrangian which leads to decoupled equations of motion for AdS fields. Such equations of motion considerably simplify the study of AdS/CFT correspondence. In the basis of conformal algebra, realization of relativistic symmetries on space of fields and antifields entering the BRST-BV formulation of AdS fields is obtained.

  1. Gravitational Lorentz Violation and Superluminality via AdS/CFT Duality

    E-Print Network [OSTI]

    Raman Sundrum

    2008-01-03

    A weak quantum mechanical coupling is constructed permitting superluminal communication within a preferred region of a gravitating AdS_5 spacetime. This is achieved by adding a spatially non-local perturbation of a special kind to the Hamiltonian of a four-dimensional conformal field theory with a weakly-coupled AdS dual, such as maximally supersymmetric Yang-Mills theory. In particular, two issues are given careful treatment: (1) the UV-completeness of our deformed CFT, guaranteeing the existence of a ``deformed string theory'' AdS dual, and (2) the demonstration that superluminal effects can take place in AdS, both on its boundary as well as in the bulk. Exotic Lorentz-violating properties such as these may have implications for tests of General Relativity, addressing the cosmological constant problem, or probing "behind'' horizons. Our construction may give insight into the interpretation of wormhole solutions in Euclidean AdS gravity.

  2. $P-V$ criticality of AdS black hole in the Einstein-Maxwell-power-Yang-Mills gravity

    E-Print Network [OSTI]

    Ming Zhang; Zhan-Ying Yang; De-Cheng Zou; Wei Xu; Rui-Hong Yue

    2014-12-03

    We study the $P-V$ critical behaivor of N-dimensional AdS black holes in Einstein-Maxwell-power-Yang-Mills gravity. Our results show the existence of the Van der Waals like small-large black hole phase transitions when taking some special values of charges of the Maxwell and Yang-Mills (YM) fields. Further to calculate the critical exponents of the black holes at the critical point, we find that they are the same as those in the Van der Waals liquid-gas system.

  3. A $\\mathcal{N}=2$ Supersymmetric $AdS_4$ Solution in M-theory with Purely Magnetic Flux

    E-Print Network [OSTI]

    Yolanda Lozano; Niall T. Macpherson; Jesús Montero

    2015-07-10

    We find a new $\\mathcal{N}=2$ $AdS_4$ solution in M-theory supported by purely magnetic flux via a sequence of abelian and non-abelian T-dualities. This provides the second known example in this class besides the uplift of the Pernici and Sezgin solution to 7d gauged supergravity constructed in the eighties. We compute the free energy of the solution, and show that it scales as $N^{3/2}$. It is intriguing that even though the natural holographic interpretation is in terms of M5-branes wrapped on a special Lagrangian 3-cycle, this solution does not exhibit the expected $N^3$ behavior.

  4. Institute for Software Technology Ad anced RoboticsAdvanced Robotics

    E-Print Network [OSTI]

    Institute for Software Technology Ad anced RoboticsAdvanced Robotics Human Robot Interaction Gerald Steinbauer Institute for Software Technology Gerald Steinbauer 1 Advanced Robotics ­ Human Robot Interaction #12;Institute for Software Technology Motivation lik t h b t th t· we like to have robots

  5. DISS. ETH NO. 16800 Understanding Ad hoc Networks

    E-Print Network [OSTI]

    of this dissertation investigates the newly-found freedom enabled by battery-powered devices: mobility. OneDISS. ETH NO. 16800 Understanding Ad hoc Networks From Geometry to Mobility A dissertation submitted to the SWISS FEDERAL INSTITUTE OF TECHNOLOGY ZURICH for the degree of Doctor of Sciences presented

  6. Shipboard lighting: A.D. 400-1900 

    E-Print Network [OSTI]

    Quinn, Kendra LeeAnne

    1999-01-01

    From A.D. 400-1900, illumination was gained by simply lighting a fibrous wick soaked in a burnable fuel. Yet, this basic technology played an integral part in the every day functioning of ships. Vessels which either sailed through the night...

  7. MOTOR VEHICLE POLICY University Policy No: AD2315

    E-Print Network [OSTI]

    Victoria, University of

    1 MOTOR VEHICLE POLICY University Policy No: AD2315 Classification: Administration Approving is to provide for the economic acquisition, maintenance, replacement and operation of motor Vehicles used for University Business. DEFINITIONS For the purposes of this policy: 2.00 Hybrid means a self propelled motor

  8. Adding Semantics to Data-Driven Paraphrasing Ellie Pavlick1

    E-Print Network [OSTI]

    Plotkin, Joshua B.

    minimal/significant husband/marry to found/party clean/cleanse tower/building boy/young girl oil/oil priceAdding Semantics to Data-Driven Paraphrasing Ellie Pavlick1 Johan Bos2 Malvina Nissim2 Charley (Figure 1). In contrast, data-driving paraphrasing typically sidesteps de- veloping a clear definition

  9. Limited Flooding Protocol for Mobile Ad hoc Networks Mieso Denko

    E-Print Network [OSTI]

    Goddard, Wayne

    Limited Flooding Protocol for Mobile Ad hoc Networks Mieso Denko Department of Computing propose a multipath routing protocol called Limited Flooding. The protocol is fully reactive and does not entail the compu- tation of routing tables. It uses the basic features of flooding but restricts packet

  10. Energy-Efficient Topology Control in Cooperative Ad Hoc Networks

    E-Print Network [OSTI]

    Wang, Yu

    Energy-Efficient Topology Control in Cooperative Ad Hoc Networks Ying Zhu, Minsu Huang, Siyuan Chen cooperative energy spanners in which the energy efficiency of individual paths are guaranteed. Both proposed of cooperative communication in various wireless network applications: energy efficient routing [23], [24], [25

  11. AARB at WACRAO From Ad hocery to Organized Chaos

    E-Print Network [OSTI]

    Emshwiller, Eve

    worthwhile!" #12;Madison Initiative for Undergraduates (MIU) 9 #12;Advisor Notes System and MIU Task Force 10AARB at WACRAO From Ad hocery to Organized Chaos: Advisors, Enterprise Architects, Registrars #12;#12;How we use the core diagram #12;#12;Moving to the CoRA Model #12;#12;Outreach to projects

  12. Kerr-NUT-AdS metrics and string theory 

    E-Print Network [OSTI]

    Chen, Wei

    2009-05-15

    With the advent of supergravity and superstring theory, it is of great importance to study higher-dimensional solutions to the Einstein equations. In this dissertation, we study the higher dimensional Kerr-AdS metrics, and show how they admit...

  13. Model of the AdS/QFT duality

    E-Print Network [OSTI]

    Stanis?aw D. G?azek; Arkadiusz P. Trawi?ski

    2013-12-02

    It is observed and illustrated in a greatly simplified example that the idea of AdS/QFT duality can be considered a special case of the Ehrenfest's correspondence principle between classical and quantum mechanics in the context of relativistic dynamics of fields and renormalization group procedure for effective particles.

  14. Integrability and the AdS/CFT correspondence

    E-Print Network [OSTI]

    Adam Rej

    2009-11-11

    In this article we review the recently discovered asymptotic integrability in the planar N = 4 SYM theory and discuss its breakdown beyond the asymptotic region due to the wrapping interactions. We also discuss novel dynamical tests of the AdS/CFT correspondence one can perform in the special cases when the wrapping interactions may be neglected.

  15. Operational Risk Management: Added Value of Advanced Methodologies

    E-Print Network [OSTI]

    Maume-Deschamps, Véronique

    Operational Risk Management: Added Value of Advanced Methodologies Paris, September 2013 Bertrand HASSANI Head of Major Risks Management & Scenario Analysis Santander UK Disclaimer: The opinions, ideas Measurement Key statements 1. Risk management moto: Si Vis Pacem Para Belum 1. Awareness 2. Prevention 3

  16. Smart Services for Ad Hoc Databases University of Washington

    E-Print Network [OSTI]

    Matrajt, Graciela

    data-base from lists of addresses of nearby schools, locations of resources (e.g., ambulances), and contact information for emergency workers. · A consulting business analyst assembles an ad hoc data- base of commercial database management systems are prohibitive, especially without access to dedicated IT staff

  17. AdSplit: Separating smartphone advertising from applications Shashi Shekhar

    E-Print Network [OSTI]

    Wallach, Dan

    AdSplit: Separating smartphone advertising from applications Shashi Shekhar shashi applications today rely on third-party advertising services, which provide libraries that are linked into the hosting application. This situ- ation is undesirable for both the application author and the advertiser

  18. Elective Participation in Ad Hoc Networks Based on Energy Consumption

    E-Print Network [OSTI]

    Deng, Jing

    Elective Participation in Ad Hoc Networks Based on Energy Consumption Marc R. Pearlman , Jing Deng of determining the op- timal transmission radius for minimal interference and energy consumption is considered be significant. There- fore, in order to more aggressively conserve energy, one must Currently with the GE Global

  19. An Energy Efficient Location Service for Mobile Ad Hoc etworks

    E-Print Network [OSTI]

    Varela, Carlos

    the distance traveled by the location update and query packets and, thus, at reducing the overall energy cost by the location update and query packets and, thus, to reduce the overall energy cost. 2 Energy Efficient LocationAn Energy Efficient Location Service for Mobile Ad Hoc etworks Zijian Wang1 , Eyuphan Bulut1

  20. Skriftlig Eksamen Algoritmer og Datastrukturer (dADS)

    E-Print Network [OSTI]

    Brodal, Gerth Stølting

    Skriftlig Eksamen Algoritmer og Datastrukturer (dADS) Datalogisk Institut Aarhus Universitet Mandag;ndende tr#26; for grafen. Sp#28;rgsm#23;al b: Argument#19;er for, at b#23;ade Dijkstras algoritme for korteste veje og Kruskals algoritme for minimum udsp#26;ndende tr#26; bruger n log n) tid p#23;a en

  1. Institute for Software Technology Ad anced RoboticsAdvanced Robotics

    E-Print Network [OSTI]

    of the medal· two sides of the medal · forward kinematics · inverse kinematics Gerald Steinbauer 8 Advanced Planar 3-R Manipulator l ki ti h i· planar kinematic chain · moves within one plane · all jointsInstitute for Software Technology Ad anced RoboticsAdvanced Robotics Manipulation and Grasping

  2. Cooperative Cache-Based Data Access in Ad Hoc Networks

    E-Print Network [OSTI]

    Yener, Aylin

    1 Cooperative Cache-Based Data Access in Ad Hoc Networks Guohong Cao, Liangzhong Yin and Chita R: Cooperative cache-based data access framework #12;6 Data Access Framework The cooperative cache-based data data authentication based on sensitivity. #12;16 Conclusion A cooperative cache-based data access

  3. Fusion for AdS/CFT boundary S-matrices

    E-Print Network [OSTI]

    Rafael I. Nepomechie; Rodrigo A. Pimenta

    2015-09-14

    We propose a fusion formula for AdS/CFT worldsheet boundary S-matrices. We show that, starting from the fundamental Y=0 boundary S-matrix, this formula correctly reproduces the two-particle bound-state boundary S-matrices.

  4. Drug Information Chart Notes Drug ad (intrinsic bias)

    E-Print Network [OSTI]

    Fletcher, Robin

    Drug Information Chart Notes Drug ad (intrinsic bias) Trade name Different for each company Dosage Same or different? A drug in a different dosage can be used for a different therapy. Precautions Check for pregnancy A complete book on drugs in pregnancy and lactation in bibliography. (unbiased

  5. Reducing the Energy Drain in Multihop Ad Hoc Geraud Allard

    E-Print Network [OSTI]

    Mans, Bernard

    that save energy of nodes with low battery but also allow the network to handle more flows. I. INTRODUCTION-efficient routing for Multihop Ad Hoc Networks (MANET) look at extend- ing battery life by minimizing the cost's shortest path algorithm in which we integrate the notion of remaining energy in order to satisfy flow

  6. Mitigating the impact of a time-dependent production process

    E-Print Network [OSTI]

    Dudnik, Sara A

    2007-01-01

    Value-added processes that bear associated wait times occur frequently during production manufacturing and increase cycle time. Since the wait time is integral to the value created by the process, it can be difficult to ...

  7. Production of zinc substituted hydroxyapatite using various precipitation routes

    E-Print Network [OSTI]

    Shepherd, David; Best, Serena Michelle

    2013-01-01

    pH sufficiently high for the production of stoichiometric hydroxyapatite using a reaction between calcium nitrate, zinc nitrate and ammonium phosphate. X-ray fluorescence (XRF) analysis showed that a significant proportion of the zinc added, did...

  8. DOE/SC-ARM-TR-102 Sonde Adjust Value-Added Product Technical Report

    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 Low-Cost2 DOE HQSiteo n n e v i2 ARM Climate162 Sonde

  9. DOE/SC-ARM-TR-140 Droplet Number Concentration Value-Added Product

    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 Low-Cost2 DOE HQSiteo n n e v i2 ARM Climate162 Sonde310

  10. DOE/SC-ARM/TR-087 Merged Sounding Value-Added Product D Troyan

    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 Low-Cost2 DOE HQSiteo n n e v i2 ARM Climate162337 Merged

  11. DOE/SC-ARM/TR-098 Micropulse Lidar Cloud Mask Value-Added Product Technical Report

    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 Low-Cost2 DOE HQSiteo n n e v i2 ARM Climate1623375 The78

  12. DOE/SC-ARM/TR-115 Aerosol Best Estimate (AEROSOLBE) Value-Added Product

    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 Low-Cost2 DOE HQSiteo n n e v i2 ARM Climate162337525

  13. DOE/SC-ARM/TR-124 Interpolated Sounding Value-Added Product

    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 Low-Cost2 DOE HQSiteo n n e v i2 ARM Climate162337525024

  14. DOE/SC-ARM/TR-129 Aerosol Optical Depth Value-Added Product

    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 Low-Cost2 DOE HQSiteo n n e v i2 ARM Climate16233752502489

  15. Communities of Pottery Production and Consumption on the Taraco Peninsula, Bolivia, 200 BC-300 AD

    E-Print Network [OSTI]

    Roddick, Andrew Paul

    2009-01-01

    finished ceramics to raw materials: oxidized color groupsF. Piechowski 1992 Ceramic raw materials survey in Pacificresults from a preliminary raw material survey. Journal of

  16. Communities of Pottery Production and Consumption on the Taraco Peninsula, Bolivia, 200 BC-300 AD

    E-Print Network [OSTI]

    Roddick, Andrew Paul

    2009-01-01

    attribute analysis, petrography, x-ray fluorescence and x-used local clays, while petrography showed that tempers were307 8.51 Petrography: Principles, methods and

  17. Process for Converting Waste Glass Fiber into Value-Added Products

    Broader source: Energy.gov [DOE]

    Solid wastes are generated at glass fiber manufacturing facilities. With the help of a grant from DOE’s Inventions and Innovation Program, Albacem, LLC, developed a new process that converts these...

  18. Identifying Employment Structure and Training Needs In the Louisiana Value-Added Wood Products Industry

    E-Print Network [OSTI]

    in Manufacturing Today ___________________________ 62 Most Pressing Issues in Manufacturing in 5 Years ................................................................................70 VI. References and Additional Literature..........................................................................71 References _____________________________________________________ 71 Additional Literature

  19. Radiatively Important Parameters Best Estimate (RIPBE): An ARM Value-Added Product

    SciTech Connect (OSTI)

    McFarlane, S; Shippert, T; Mather, J

    2011-06-30

    The Radiatively Important Parameters Best Estimate (RIPBE) VAP was developed to create a complete set of clearly identified set of parameters on a uniform vertical and temporal grid to use as input to a radiative transfer model. One of the main drivers for RIPBE was as input to the Broadband Heating Rate Profile (BBHRP) VAP, but we also envision using RIPBE files for user-run radiative transfer codes, as part of cloud/aerosol retrieval testbeds, and as input to averaged datastreams for model evaluation.

  20. Communities of Pottery Production and Consumption on the Taraco Peninsula, Bolivia, 200 BC-300 AD

    E-Print Network [OSTI]

    Roddick, Andrew Paul

    2009-01-01

    Archaeology and Paleoecology of an Andean Civilization. ,Archaeology and Paleoecology of an Andean Civilization.archaeology and paleoecology of an Andean civilization,

  1. ARM Climate Research Facility Quarterly Value-Added Product Report, Fourth Quarter

    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 ofkandz-cm11 Outreach Home Room News Publications Traditional Knowledge Kiosks Barrow, Alaska TropicalStorms7 ARMData72 ARM

  2. Microsoft Word - ARM Value-Added Product_tech_rpt_v2.doc

    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 map shines light on77 PAGE OF PAGESpersonal informationAGENCY RECORD OF78An/n77 An

  3. Recent Developments on the Broadband Heating Rate Profile Value-Added Product

    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 wouldMassR&D100 Winners * Impacts onReal-Time Chemical ImagingSelectedRecent Developments on

  4. Non-extended phase space thermodynamics of Lovelock AdS black holes in grand canonical ensemble

    E-Print Network [OSTI]

    Mo, Jie-Xiong

    2015-01-01

    Recently, extended phase space thermodynamics of Lovelock AdS black holes has been of great interest. To provide insight from a different perspective and gain a unified phase transition picture, non-extended phase space thermodynamics of $(n+1)$-dimensional charged topological Lovelock AdS black holes is investigated detailedly in the grand canonical ensemble. Specifically, the specific heat at constant electric potential is calculated and phase transition in the grand canonical ensemble is discussed. To probe the impact of the various parameters, we utilize the control variate method and solve the phase transition condition equation numerically for the case $k=1,-1$. There are two critical points for the case $n=6,k=1$ while there is only one for other cases. For $k=0$, there exists no phase transition point. To figure out the nature of phase transition in the grand canonical ensemble, we carry out an analytic check of the analog form of Ehrenfest equations proposed by Banerjee et al. It is shown that Lovelo...

  5. Membrane-Based Energy Efficient Dewatering of Microalgae in Biofuels Production and Recovery of Value Added Co-Products

    SciTech Connect (OSTI)

    Bhave, Ramesh R [ORNL; Kuritz, Tanya [ORNL; Powell, Lawrence E [ORNL; Adcock, Kenneth Dale [ORNL

    2012-01-01

    The objective of this paper is to describe the use of membranes for energy efficient biomass harvesting and dewatering. We have evaluated the dewatering of Nannochloropsis sp. with polymeric hollow fiber and tubular inorganic membranes to demonstrate the capabilities of a membrane-based system to achieve microalgal biomass of >150 g/L (dry wt.) and ~99% volume reduction through dewatering. The particle free filtrate containing the growth media is suitable for recycle and reuse. For cost-effective processing, hollow fiber membranes can be utilized to recover 90-95% media for recycle. Tubular membranes can provide additional media and water recovery to achieve target final concentrations. Based on the operating conditions used in this study and taking into scale-up considerations, it can be shown that an integrated hollow fiber-tubular membrane system can process microalgal biomass with at least 80% lower energy requirement compared to traditional processes. Backpulsing was found to be an effective flux maintenance strategy to minimize flux decline at high biomass concentration. An effective chemical cleaning protocol was developed for regeneration of fouled membranes.

  6. TRIANGULATION OF LH SYSTEMS' ADS40 IMAGERY USING ORIMA GPS/IMU L. Hinsken a

    E-Print Network [OSTI]

    Giger, Christine

    TRIANGULATION OF LH SYSTEMS' ADS40 IMAGERY USING ORIMA GPS/IMU L. Hinsken a , S. Miller b , U, Technology, Scene, GPS, ADS40, Orientation Fixes ABSTRACT: The paper describes the mathematical model used for the triangulation of the ADS40. The ADS40 Airborne Digital Sensor is LH Systems' multi-line scanner (Röser, 2000

  7. Fission Product Sorptivity in Graphite

    SciTech Connect (OSTI)

    Tompson, Jr., Robert V.; Loyalka, Sudarshan; Ghosh, Tushar; Viswanath, Dabir; Walton, Kyle; Haffner, Robert

    2015-04-01

    Both adsorption and absorption (sorption) of fission product (FP) gases on/into graphite are issues of interest in very high temperature reactors (VHTRs). In the original proposal, we proposed to use packed beds of graphite particles to measure sorption at a variety of temperatures and to use an electrodynamic balance (EDB) to measure sorption onto single graphite particles (a few ?m in diameter) at room temperature. The use of packed beds at elevated temperature is not an issue. However, the TPOC requested revision of this initial proposal to included single particle measurements at elevated temperatures up to 1100 °C. To accommodate the desire of NEUP to extend the single particle EDB measurements to elevated temperatures it was necessary to significantly revise the plan and the budget. These revisions were approved. In the EDB method, we levitate a single graphite particle (the size, surface characteristics, morphology, purity, and composition of the particle can be varied) or agglomerate in the balance and measure the sorption of species by observing the changes in mass. This process involves the use of an electron stepping technique to measure the total charge on a particle which, in conjunction with the measured suspension voltages for the particle, allows for determinations of mass and, hence, of mass changes which then correspond to measurements of sorption. Accommodating elevated temperatures with this type of system required a significant system redesign and required additional time that ultimately was not available. These constraints also meant that the grant had to focus on fewer species as a result. Overall, the extension of the original proposed single particle work to elevated temperatures added greatly to the complexity of the proposed project and added greatly to the time that would eventually be required as well. This means that the bulk of the experimental progress was made using the packed bed sorption systems. Only being able to recruit one graduate student meant that data acquisition with the packed bed systems ended up competing for the graduate student’s available time with the electrodynamic balance redesign and assembly portions of the project. This competition for available time was eventually mitigated to some extent by the later recruitment of an undergraduate student to help with data collection using the packed bed system. It was only the recruitment of the second student that allowed the single particle balance design and construction efforts to proceed as far as they did during the project period. It should be added that some significant time was also spent by the graduate student cataloging previous work involving graphite. This eventually resulted in a review paper being submitted and accepted (“Adsorption of Iodine on Graphite in High Temperature Gas-Cooled Reactor Systems: A Review,” Kyle L. Walton, Tushar K. Ghosh, Dabir S. Viswanath, Sudarshan K. Loyalka, Robert V. Tompson). Our specific revised objectives in this project were as follows: Experimentally obtain isotherms of Iodine for reactor grade IG-110 samples of graphite particles over a range of temperatures and pressures using an EDB and a temperature controlled EDB; Experimentally obtain isotherms of Iodine for reactor grade IG-110 samples of graphite particles over a range of temperatures and pressures using a packed column bed apparatus; Explore the effect that charge has on the adsorption isotherms of iodine by varying the charges on and the voltages used to suspend the microscopic particles in the EDB; and To interpret these results in terms of the existing models (Langmuir, BET, Freundlich, and others) which we will modify as necessary to include charge related effects.

  8. A Platform for Implementing Secure Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Farkas, Gyula; Haller, Piroska

    2010-01-01

    We propose a new platform for implementing secure wireless ad hoc networks. Our proposal is based on a modular architecture, with the software stack constructed directly on the Ethernet layer. Within our platform we use a new security protocol that we designed to ensure mutual authentication between nodes and a secure key exchange. The correctness of the proposed security protocol is ensured by Guttman's authentication tests.

  9. Some Recent Progress in AdS/CFT

    E-Print Network [OSTI]

    John H. Schwarz

    2010-06-08

    Much of modern string theory research concerns AdS/CFT duality, or more generally, gauge/gravity duality. The main subjects are a) Testing and understanding such dualities by exploring how they work for systems with a lot of supersymmetry b) Constructing and exploring approximate string theory duals of QCD c) Applying gauge/gravity duality to other areas of physics such as condensed matter and nuclear physics. I will briefly discuss the first topic.

  10. The Ad Lucem Research Network | Department of Energy

    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 RankADVANCEDInstallers/ContractorsPhotovoltaics »TanklessResearchEnergy2 DOE Hydrogen12The Ad Lucem

  11. Value-Added Stock Loan Participation Program | Department of Energy

    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 DeliciousMathematics And Statistics » USAJobs Search USAJobs SearchWater-SavingofCode |Department of1855Value-Added

  12. Cr(OH)?(s) Oxidation Induced by Surface Catalyzed Mn(II) Oxidation

    SciTech Connect (OSTI)

    Namgung, Seonyi; Kwon, M.; Qafoku, Nikolla; Lee, Gie Hyeon

    2014-09-16

    This study examined the feasibility of Cr(OH)?(s) oxidation mediated by surface catalyzed Mn(II) oxidation under common groundwater pH conditions as a potential pathway of natural Cr(VI) contaminations. Dissolved Mn(II) (50 ?M) was reacted with or without synthesized Cr(OH)?(s) (1.0 g/L) at pH 7 – 9 under oxic or anoxic conditions. In the absence of Cr(OH)?(s), homogeneous Mn(II) oxidation by dissolved O? was not observed at pH ? 8.0 for 50 d. At pH 9.0, by contrast, dissolved Mn(II) was completely removed within 8 d and precipitated as hausmannite. When Cr(OH)?(s) was present, this solid was oxidized and released substantial amounts of Cr(VI) as dissolved Mn(II) was added into the suspension at pH ? 8.0 under oxic conditions. Our results suggest that Cr(OH)?(s) was readily oxidized by a newly formed Mn oxide as a result of Mn(II) oxidation catalyzed on Cr(OH)?(s) surface. XANES analysis of the residual solids after the reaction between 1.0 g/L Cr(OH)?(s) and 204 ?M Mn(II) at pH 9.0 for 22 d revealed that the product of surface catalyzed Mn(II) oxidation resembled birnessite. The rate and extent of Cr(OH)?(s) oxidation was likely controlled by those of surface catalyzed Mn(II) oxidation as the production of Cr(VI) increased with increasing pH and initial Mn(II) concentrations. This study evokes the potential environmental hazard of sparingly soluble Cr(OH)?(s) that can be a source of Cr(VI) in the presence of dissolved Mn(II).

  13. Mitigation of radiation induced surface contamination

    DOE Patents [OSTI]

    Klebanoff, Leonard E. (Dublin, CA); Stulen, Richard H. (Livermore, CA)

    2003-01-01

    A process for mitigating or eliminating contamination and/or degradation of surfaces having common, adventitious atmospheric contaminants adsorbed thereon and exposed to radiation. A gas or a mixture of gases is introduced into the environment of a surface(s) to be protected. The choice of the gaseous species to be introduced (typically a hydrocarbon gas, water vapor, or oxygen or mixtures thereof) is dependent upon the contaminant as well as the ability of the gaseous species to bind to the surface to be protected. When the surface and associated bound species are exposed to radiation reactive species are formed that react with surface contaminants such as carbon or oxide films to form volatile products (e.g., CO, CO.sub.2) which desorb from the surface.

  14. Effects of trace metals on diatom export products from the euphotic zone and significance for biogeochemical cycles

    E-Print Network [OSTI]

    Richter, Daniel J.

    Geological considerations: export products of interest . . 4of production and particulate export in the surface ocean.of trace metals on diatom export products from the euphotic

  15. Ehrenfest Scheme of Higher Dimensional Topological AdS Black Holes in The Third Order Lovelock-Born-Infeld Gravity

    E-Print Network [OSTI]

    A. Belhaj; M. Chabab; H. EL Moumni; K. Masmar; M. B. Sedra

    2015-07-01

    Interpreting the cosmological constant as a thermodynamic pressure and its conjugate quantity as a thermodynamic volume, we reconsider the investigation of P-V critical behaviors of (1+n)-dimensional topological AdS black holes in Lovelock-Born-Infeld gravity. In particular, we give an explicit expression of the universal number \\chi=\\frac{P_c v_c}{T_c} in terms of the space dimension $n$. Then, we examine the phase transitions at the critical points of such topological black holes for 6 \\leq n \\leq 11 as required by the physical condition of the thermodynamical quantities. More precisely, the Ehrenfest equations have been checked revealing that the black hole system undergoes a second phase transition at the critical points.

  16. Derivation of the action and symmetries of the q-deformed AdS_5 x S^5 superstring

    E-Print Network [OSTI]

    Francois Delduc; Marc Magro; Benoit Vicedo

    2014-09-01

    We recently proposed an integrable q-deformation of the AdS_5 x S^5 superstring action. Here we give details on the hamiltonian origin and construction of this deformation. The procedure is a generalization of the one previously developed for deforming principal chiral and symmetric space sigma-models. We also show that the original psu(2,2|4) symmetry is replaced in the deformed theory by a classical analog of the quantum group U_q(psu(2,2|4)) with q real. The relation between q and the deformation parameter entering the action is given. The framework used to derive the deformation also enables to prove that at the hamiltonian level, the "maximal deformation" limit corresponds to an undeformed semi-symmetric space sigma-model with bosonic part dS_5 x H^5. Finally, we discuss the various freedoms in the construction.

  17. pQCD vs. AdS/CFT Tested by Heavy Quark Energy Loss

    E-Print Network [OSTI]

    W. A. Horowitz

    2007-10-03

    We predict the charm and bottom quark nuclear modification factors using weakly coupled pQCD and strongly coupled AdS/CFT drag methods. The log(pT/M_Q)/pT dependence of pQCD loss and the momentum independence of drag loss lead to different momentum dependencies for the R_{AA} predictions. This difference is enhanced by examining a new experimental observable, the double ratio of charm to bottom nuclear modification factors, R^{cb}=R^c_{AA}/R^b_{AA}. At LHC the weakly coupled theory predicts R^{cb} goes to 1; whereas the strongly coupled theory predicts R^{cb} .2 independent of pT. At RHIC the differences are less dramatic, as the production spectra are harder, but the drag formula is applicable to higher momenta, due to the lower temperature.

  18. Gallium surface diffusion on GaAs (001) surfaces measured by crystallization dynamics of Ga droplets

    SciTech Connect (OSTI)

    Bietti, Sergio, E-mail: sergio.bietti@mater.unimib.it; Somaschini, Claudio; Esposito, Luca; Sanguinetti, Stefano [L–NESS and Dipartimento di Scienza dei Materiali, Università di Milano Bicocca, Via Cozzi 55, I–20125 Milano (Italy); Fedorov, Alexey [L–NESS and CNR–IFN, via Anzani 42, I-22100 Como (Italy)

    2014-09-21

    We present accurate measurements of Ga cation surface diffusion on GaAs surfaces. The measurement method relies on atomic force microscopy measurement of the morphology of nano–disks that evolve, under group V supply, from nanoscale group III droplets, earlier deposited on the substrate surface. The dependence of the radius of such nano-droplets on crystallization conditions gives direct access to Ga diffusion length. We found an activation energy for Ga on GaAs(001) diffusion E{sub A}=1.31±0.15 eV, a diffusivity prefactor of D?=0.53(×2.1±1) cm² s?¹ that we compare with the values present in literature. The obtained results permit to better understand the fundamental physics governing the motion of group III ad–atoms on III–V crystal surfaces and the fabrication of designable nanostructures.

  19. Experimental Study on Shear Fatigue Behavior and Stiffness Performance of Warm Mix Asphalt by adding Synthetic Wax

    E-Print Network [OSTI]

    Petit, Christophe; Canestrari, Francesco; Pannunzio, Valter; Virgili, Amadeo

    2012-01-01

    Synthetic waxes produced by standard and registered processes may be used to manufacture Warm Mix Asphalt (WMA), which is a modified asphalt concrete produced, applied and compacted at temperatures below those typically required. This feature leads to environmental benefits, such as reduced energy consumption, gas and fume emissions, as well as to economic/operational advantages, such as lower production costs and greater hauling distances for extended construction seasons with tighter schedules. The present article serves to compare the mechanical performance of a WMA produced by adding synthetic wax with a traditional Hot Mix Asphalt (HMA) specimen, in terms of shear fatigue response and both complex and stiffness moduli. The experimental results and related modeling work demonstrate that adding synthetic wax into the WMA composition does not hinder either the destructive or non-destructive performance of an HMA, and this finding is corroborated by respectively measuring fatigue life and stiffness.

  20. Experimental Study on Shear Fatigue Behavior and Stiffness Performance of Warm Mix Asphalt by adding Synthetic Wax

    E-Print Network [OSTI]

    Christophe Petit; Anne Millien; Francesco Canestrari; Valter Pannunzio; Amadeo Virgili

    2012-03-13

    Synthetic waxes produced by standard and registered processes may be used to manufacture Warm Mix Asphalt (WMA), which is a modified asphalt concrete produced, applied and compacted at temperatures below those typically required. This feature leads to environmental benefits, such as reduced energy consumption, gas and fume emissions, as well as to economic/operational advantages, such as lower production costs and greater hauling distances for extended construction seasons with tighter schedules. The present article serves to compare the mechanical performance of a WMA produced by adding synthetic wax with a traditional Hot Mix Asphalt (HMA) specimen, in terms of shear fatigue response and both complex and stiffness moduli. The experimental results and related modeling work demonstrate that adding synthetic wax into the WMA composition does not hinder either the destructive or non-destructive performance of an HMA, and this finding is corroborated by respectively measuring fatigue life and stiffness.

  1. Some engineering properties of heavy concrete added silica fume

    SciTech Connect (OSTI)

    Akka?, Ay?e; Ba?yi?it, Celalettin; Esen, Serap

    2013-12-16

    Many different types of building materials have been used in building construction for years. Heavy concretes can be used as a building material for critical building as it can contain a mixture of many heavy elements. The barite itself for radiation shielding can be used and also in concrete to produce the workable concrete with a maximum density and adequate structural strength. In this study, some engineering properties like compressive strength, elasticity modules and flexure strength of heavy concretes’ added Silica fume have been investigated.

  2. Observers and the AdS/CFT correspondence

    E-Print Network [OSTI]

    M. Dance

    2010-12-18

    The paper \\cite{Dance0601} tentatively suggested a physical picture that might underlie string theories. The string parameters $\\tau $ and $\\sigma_i $ were interpreted as spacetime dimensions which a simple quantum mechanical observer can observe, while symmetries of the relevant observer states could limit the observability of other dimensions. The present paper extends the discussion by outlining how consideration of different observers, at least one of which is quantum mechanical, might provide insights into the nature of the AdS/CFT correspondence. It is suggested that such correspondences might arise as different forms of theories about the world as perceived by different observers.

  3. AD&D insurance offers three coverage options

    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 ofkandz-cm11 Outreach HomeA Better Anode Design to Improve4AJ01) (See Energy Level79AJ01) (NotAdvanced ABSTRACTSFor-1AD&D

  4. AD Hydro Power Ltd ADHPL | 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 LIST OFAMERICA'SHeavyAgencyTendo NewYanbu,Information onAD Hydro Power Ltd ADHPL

  5. Value Added Energy Information Systems VAEIS | 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 ECoop IncIowa (Utility Company) JumpGTZUtility Rates API VersionVadiumNevada)Value Added

  6. Ad Lucem Workshop: Modeling Breakout Session | Department of Energy

    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:Financing ToolInternationalReportOfficeAcqguide18pt0 March 2011VisitsWorkshop Welcome Ad

  7. Ad Lucem: Modeling Market Transformation Pathways Workshop | 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:Financing ToolInternationalReportOfficeAcqguide18pt0 March 2011VisitsWorkshop Welcome AdEnergy

  8. Preprint typeset in JHEP style -PAPER VERSION hep-ph/yymmnnn Glueballs and AdS/CFT

    E-Print Network [OSTI]

    Terning, John

    Preprint typeset in JHEP style - PAPER VERSION hep-ph/yymmnnn Glueballs and AdS/CFT John Terning T. In this limit the metric reduces to that of AdS5 × S5 , where AdS5 is a 5D anti-de Sitter (negatively curved tension, gs is the string coupling constant and d5 is the line element on S5 . The boundary of AdS5

  9. Preprint typeset in JHEP style. -PAPER VERSION hep-ph/yymmnnn Glueballs and AdS/CFT

    E-Print Network [OSTI]

    Terning, John

    Preprint typeset in JHEP style. - PAPER VERSION hep-ph/yymmnnn Glueballs and AdS/CFT John Terning T around the D3-branes. In this limit the metric reduces to that of AdS 5 #2; S 5 , where AdS 5 is a 5D coupling constant and d 5 is the line element on S 5 . The boundary of AdS 5 at #26; = 1 is a at 4D space

  10. Digital ad morphing : using behavioral analysis to increase response rates to online advertisements

    E-Print Network [OSTI]

    Link, Cordelia S

    2011-01-01

    This paper details the implementation and testing of a digital ad morphing system, a system which determines user cognitive style based on interaction with a website and serves ads designed to complement that cognitive ...

  11. A systems approach to identifying aircraft equipage requirements, benefits, and risks of ADS-B applications

    E-Print Network [OSTI]

    Jenkins, Marisa Rachael

    2009-01-01

    Automatic Dependent Surveillance-Broadcast (ADS-B) is considered to be a crucial part of the next generation of air transportation systems worldwide. Developing mature ADS-B applications which provide stakeholders with ...

  12. Generalized Parton Distributions for the Proton in AdS/QCD

    E-Print Network [OSTI]

    Dipankar Chakrabarti; Chandan Mondal

    2013-10-22

    We present a study of proton GPDs in both momentum and position spaces using proton wavefunction obtained from AdS/ QCD. Here we consider the soft wall model. The results are compared with a phenomenological model of proton GPDs.

  13. DOMINO-AD protocol: donepezil and memantine in moderate to severe Alzheimer's disease - a multicentre RCT

    E-Print Network [OSTI]

    Jones, Rob; Sheehan, Bart; Phillips, Patrick; Juszczak, Ed; Adams, Jessica; Baldwin, Ashley; Ballard, Clive; Banerjee, Sube; Barber, Bob; Bentham, Peter; Brown, Richard; Burns, Alistair; Dening, Tom; Findlay, David; Gray, Richard; Griffin, Mary; Holmes, Clive; Hughes, Alan; Jacoby, Robin; Johnson, Tony; Jones, Roy; Knapp, Martin; Lindesay, James; McKeith, Ian; McShane, Rupert; Macharouthu, Ajay; O'Brien, John; Onions, Caroline; Passmore, Peter; Raftery, James; Ritchie, Craig; Howard, Rob; Domino-ad Team

    2009-07-24

    . Method DOMINO-AD is a pragmatic, 15 centre, double-blind, randomized, placebo controlled trial. Patients with AD, currently living at home, receiving donepezil 10 mg daily, and with Standardized Mini-Mental State Examination (SMMSE) scores between 5...

  14. Design techniques for low noise and high speed A/D converters 

    E-Print Network [OSTI]

    Gupta, Amit Kumar

    2009-05-15

    subscriber line (ADSL) modems, cellular systems, high accuracy instrumentation, and medical imaging systems. This thesis suggests some design techniques for such high resolution and high sampling rate A/D converters. As the A/D converter performance keeps...

  15. Generalized Parton Distributions for the Proton in AdS/QCD

    E-Print Network [OSTI]

    Chakrabarti, Dipankar

    2013-01-01

    We present a study of proton GPDs in both momentum and position spaces using proton wavefunction obtained from AdS/ QCD. Here we consider the soft wall model. The results are compared with a phenomenological model of proton GPDs.

  16. Comparison of value-added models for school ranking and classification: a Monte Carlo study 

    E-Print Network [OSTI]

    Wang, Zhongmiao

    2009-05-15

    A “Value-Added” definition of school effectiveness calls for the evaluation of schools based on the unique contribution of schools to individual student academic growth. The estimates of value-added school effectiveness are usually used for ranking...

  17. Service Discovery in Mobile Ad Hoc Networks: A Field Theoretic Approach Vincent Lenders

    E-Print Network [OSTI]

    Lenders, Vincent

    Service Discovery in Mobile Ad Hoc Networks: A Field Theoretic Approach Vincent Lenders , Martin: {lenders, may, plattner}@tik.ee.ethz.ch Abstract Service discovery in mobile ad hoc networks is challeng

  18. TDROP: A routing protocol for physically hierarchical ad hoc mobile networks 

    E-Print Network [OSTI]

    Ahmed, Zaheer

    2000-01-01

    Many protocols for routing in mobile ad hoc networks have been proposed. None of these protocols differentiates mobile nodes based on their physical characteristics and also there is only one proposal for connecting ad hoc ...

  19. FaultTolerant Distributed Algorithms in Sparse Ad Hoc Wireless Networks

    E-Print Network [OSTI]

    Fault­Tolerant Distributed Algorithms in Sparse Ad Hoc Wireless Networks (SPAWN) BETTINA WEISS communication technologies, wireless ad hoc networks are increasingly commonplace nowadays. Spontaneous (``ad wireless sensor networks and disaster area communication systems. It is also a major enabling technology

  20. Ad hoc networks beyond unit disk graphs Fabian Kuhn Roger Wattenhofer Aaron Zollinger

    E-Print Network [OSTI]

    miniaturization of electronics in general and wireless communication technology in particular is mobile ad hoc networks. Ad hoc networks are formed by mobile devices consisting of, among other components, a processor a weak battery or a small solar cell. Typically, wireless ad hoc networks are intended to be employed

  1. A Mean Field Based Methodology for Modeling Mobility in Ad Hoc Networks

    E-Print Network [OSTI]

    Horváth, András

    the behavior of the system. Index Terms--ad hoc networks, mean field analysis, Petri nets; I. INTRODUCTIONA Mean Field Based Methodology for Modeling Mobility in Ad Hoc Networks Marco Beccuti1--In this paper we propose a methodology for the modeling and analysis of ad hoc networks composed by a large

  2. Wireless ad hoc networks Acknowledgement: Slides borrowed from Richard Y. Yang @ Yale

    E-Print Network [OSTI]

    Gao, Jie

    are not flexible. ­ Vulnerable to attacks. · Ad hoc networks· Ad hoc networks ­ Flexible, easy to deploy, cheaper · Optimal power assignment /transmission range · Optimal scheduling & multi-hop routing · Node are staticWireless ad hoc networks Acknowledgement: Slides borrowed from Richard Y. Yang @ Yale #12

  3. Single Comparator Based A/D Converter for Output Voltage Sensing in

    E-Print Network [OSTI]

    Single Comparator Based A/D Converter for Output Voltage Sensing in Power Factor Correction frequency (2fline) without the use of a traditional analog to digital converter (A/D). The proposed method/D or a traditional A/D in a digitally controlled 300W boost PFC. I. INTRODUCTION Many implementations of digital

  4. Capacity Region, Minimum Energy and Delay for a Mobile Ad-Hoc Network

    E-Print Network [OSTI]

    Chen, Yuanzhu Peter

    Capacity Region, Minimum Energy and Delay for a Mobile Ad-Hoc Network Rahul Urgaonkar, Michael J in a mobile ad-hoc network: the capacity region and the minimum energy function of the network. The capacity limits of a mobile ad-hoc network are the capacity region and the minimum energy function of the network

  5. Low-complexity energy-efficient broadcasting in wireless ad-hoc networks using network coding

    E-Print Network [OSTI]

    Chen, Yuanzhu Peter

    Low-complexity energy-efficient broadcasting in wireless ad-hoc networks using network coding J energy broadcasting in ad-hoc wireless networks is NP-complete [3] and a large number of approximation of minimizing the energy per bit when multicasting in an ad-hoc wireless network. An alternative formulation

  6. Reliable and Energy-Efficient Routing for Static Wireless Ad Hoc Networks with Unreliable Links

    E-Print Network [OSTI]

    Wang, Yu

    Reliable and Energy-Efficient Routing for Static Wireless Ad Hoc Networks with Unreliable Links. In this paper, we address the problem of energy efficient reliable routing for wireless ad hoc networks communication, energy efficiency. Ç 1 INTRODUCTION WIRELESS ad hoc networks draw lots of attentions in recent

  7. Delta resonances, quark models, chiral symmetry and AdS/QCD

    E-Print Network [OSTI]

    E. Klempt

    2008-06-26

    The mass spectrum of Delta resonances is compared to predictions based on three quark-model variants, to predictions assuming that chiral symmetry is restored in high-mass baryon resonances, and to predictions derived from AdS/QCD. The latter approach yields a nearly perfect agreement when the confinement property of QCD is modeled by a soft wall in AdS.

  8. Preliminary Analysis of Potential ADS-B User Benefits for Hawaiian Helicopter Air Tour Operators

    E-Print Network [OSTI]

    Lester, Edward

    ADS-B ground infrastructure is currently planned to be installed in Hawaii between 2010 and 2013 as part of the National Airspace System (NAS) wide implementation of ADS-B. Current plans call for ADS-B coverage to be focused ...

  9. Neutronic aspects of inert matrix fuels for application in ADS J. Wallenius *

    E-Print Network [OSTI]

    Neutronic aspects of inert matrix fuels for application in ADS J. Wallenius * Department of Nuclear, safety parameters of 800 MWth ADS cores operating on oxide and nitride fuels with high americium content cores questionable. The introduction of ac- celerator driven systems (ADS) for the purpose of minor

  10. Banner Ads Hinder Visual Search and Are Forgotten Moira Burke1

    E-Print Network [OSTI]

    Hornof, Anthony

    Banner Ads Hinder Visual Search and Are Forgotten Moira Burke1 , Nicholas Gorman2 , Erik Nilsen2, nilsen} @lclark.edu ABSTRACT Banner ads persist on the Internet in spite of evidence against their efficacy. Many ads include animation in an attempt to increase their attentional capture. An experiment

  11. Impact Of Ranking Of Organic Search Results On The Incrementality Of Search Ads

    E-Print Network [OSTI]

    Cortes, Corinna

    Impact Of Ranking Of Organic Search Results On The Incrementality Of Search Ads David X. Chan Results On The Incrementality Of Search Ads Abstract 1 Introduction 2 Methodology 3 MetaAnalysis Results 4 that on average 89% of the visits to the advertiser's site from search ad

  12. The Optimal Mix of TV and Online Ads to Maximize Reach

    E-Print Network [OSTI]

    Cortes, Corinna

    The Optimal Mix of TV and Online Ads to Maximize Reach Yuxue Jin, Georg M. Goerg, Nicolas Remy, Jim allocate budget between TV and online ads in order to maximize reach or maintain the same reach at a lower budget allocation between TV and online ads to maximize reach to the target demographics. We take

  13. Asplund et al. Wireless Ad Hoc Dissemination for Search and Rescue Proceedings of the 7th

    E-Print Network [OSTI]

    Asplund et al. Wireless Ad Hoc Dissemination for Search and Rescue Proceedings of the 7th International ISCRAM Conference ­ Seattle, USA, May 2010 1 Wireless Ad Hoc Dissemination for Search and Rescue communication and Internet connectivity. Even if we consider wireless ad hoc communication as a means

  14. A Multiobjective Performance Evaluation Framework for Routing in Wireless Ad Hoc

    E-Print Network [OSTI]

    Jaffrès-Runser, Katia

    network when delay, robustness and energy are considered. I. INTRODUCTION Wireless ad hoc and sensor to transmission delay [8], energy consumption [9] or fairness [10] are added on top of its main design goalA Multiobjective Performance Evaluation Framework for Routing in Wireless Ad Hoc Networks Katia

  15. Precision calculation of 1/4-BPS Wilson loops in AdS$_5\\times S^5$

    E-Print Network [OSTI]

    Forini, V; Griguolo, L; Seminara, D; Vescovi, E

    2015-01-01

    We study the strong coupling behaviour of $1/4$-BPS circular Wilson loops (a family of "latitudes") in ${\\cal N}=4$ Super Yang-Mills theory, computing the one-loop corrections to the relevant classical string solutions in AdS$_5\\times$S$^5$. Supersymmetric localization provides an exact result that, in the large 't Hooft coupling limit, should be reproduced by the sigma-model approach. To avoid ambiguities due to the absolute normalization of the string partition function, we compare the $ratio$ between the generic latitude and the maximal 1/2-BPS circle: Any measure-related ambiguity should simply cancel in this way. We use Gel'fand-Yaglom method to calculate the relevant functional determinants, that present some complications with respect to the standard circular case. After a careful numerical evaluation of our final expression we still find disagreement with the localization answer: The difference is encoded into a precise "remainder function". We comment on the possible origin and resolution of this dis...

  16. Preparation of transition metal nanoparticles and surfaces modified with (CO) polymers synthesized by RAFT

    DOE Patents [OSTI]

    McCormick, III, Charles L. (Hattiesburg, MS); Lowe, Andrew B. (Hattiesburg, MS); Sumerlin, Brent S. (Pittsburgh, PA)

    2006-10-25

    A new, facile, general one-phase method of generating thiol-functionalized transition metal nanoparticles and surface modified by (co)polymers synthesized by the RAFT method is described. The method includes the steps of forming a (co)polymer in aqueous solution using the RAFT methodology, forming a collidal transition metal precursor solution from an appropriate transition metal; adding the metal precursor solution or surface to the (co)polymer solution, adding a reducing agent into the solution to reduce the metal colloid in situ to produce the stabilized nanoparticles or surface, and isolating the stabilized nanoparticles or surface in a manner such that aggregation is minimized. The functionalized surfaces generated using these methods can further undergo planar surface modifications, such as fuctionalization with a variety of different chemical groups, expanding their utility and application.

  17. Preparation of transition metal nanoparticles and surfaces modified with (CO)polymers synthesized by RAFT

    DOE Patents [OSTI]

    McCormick, III., Charles L.; Lowe, Andrew B.; Sumerlin, Brent S.

    2006-11-21

    A new, facile, general one-phase method of generating thio-functionalized transition metal nanoparticles and surfaces modified by (co)polymers synthesized by the RAFT method is described. The method includes the stops of forming a (co)polymer in aqueous solution using the RAFT methodology, forming a colloidal transition metal precursor solution from an appropriate transition metal; adding the metal precursor solution or surface to the (co)polymer solution, adding a reducing agent into the solution to reduce the metal colloid in situ to produce the stabilized nanoparticles or surface, and isolating the stabilized nanoparticles or surface in a manner such that aggregation is minimized. The functionalized surfaces generated using these methods can further undergo planar surface modifications, such as functionalization with a variety of different chemical groups, expanding their utility and application.

  18. Preparation of transition metal nanoparticles and surfaces modified with (co)polymers synthesized by RAFT

    DOE Patents [OSTI]

    McCormick, III, Charles L. (Hattiesburg, MS); Lowe, Andrew B. (Hattiesburg, MS); Sumerlin, Brent S. (Pittsburgh, PA)

    2011-12-27

    A new, facile, general one-phase method of generating thiol-functionalized transition metal nanoparticles and surfaces modified by (co)polymers synthesized by the RAFT method is described. The method includes the steps of forming a (co)polymer in aqueous solution using the RAFT methodology, forming a colloidal transition metal precursor solution from an appropriate transition metal; adding the metal precursor solution or surface to the (co)polymer solution, adding a reducing agent into the solution to reduce the metal colloid in situ to produce the stabilized nanoparticles or surface, and isolating the stabilized nanoparticles or surface in a manner such that aggregation is minimized. The functionalized surfaces generated using these methods can further undergo planar surface modifications, such as functionalization with a variety of different chemical groups, expanding their utility and application.

  19. The 2010 International Computer Symposium Aggregate Two-way Co-Clustering of Ads and User Analysis for Online

    E-Print Network [OSTI]

    Chang, Chia-Hui

    The 2010 International Computer Symposium Aggregate Two-way Co-Clustering of Ads and User Analysis ads and users need to be clustered. The key data that connect ads and users are contained in the user-ad link matrix, which denotes the ads that a user has linked. We proposed a three-staged clustering

  20. Energy Aware Implementation of an Ad Hoc Routing Protocol

    E-Print Network [OSTI]

    Brown, Timothy X.

    to the world of research. This thesis is a product of his never-ending knowledge, ingenious ideas, constant, and encouragement. I would like to thank my parents for inspiring me to pursue higher education. I would lik

  1. Rethinking Information Theory for Mobile Ad Hoc Networks

    E-Print Network [OSTI]

    Andrews, Jeff; Haenggi, Martin; Berry, Randy; Jafar, Syed; Guo, Dongning; Shakkottai, Sanjay; Heath, Robert; Neely, Michael; Weber, Steven; Yener, Aylin

    2007-01-01

    The subject of this paper is the long-standing open problem of developing a general capacity theory for wireless networks, particularly a theory capable of describing the fundamental performance limits of mobile ad hoc networks (MANETs). A MANET is a peer-to-peer network with no pre-existing infrastructure. MANETs are the most general wireless networks, with single-hop, relay, interference, mesh, and star networks comprising special cases. The lack of a MANET capacity theory has stunted the development and commercialization of many types of wireless networks, including emergency, military, sensor, and community mesh networks. Information theory, which has been vital for links and centralized networks, has not been successfully applied to decentralized wireless networks. Even if this was accomplished, for such a theory to truly characterize the limits of deployed MANETs it must overcome three key roadblocks. First, most current capacity results rely on the allowance of unbounded delay and reliability. Second, ...

  2. AdSplit: Separating smartphone advertising from applications

    E-Print Network [OSTI]

    Shekhar, Shashi; Wallach, Dan S

    2012-01-01

    A wide variety of smartphone applications today rely on third-party advertising services, which provide libraries that are linked into the hosting application. This situation is undesirable for both the application author and the advertiser. Advertising libraries require additional permissions, resulting in additional permission requests to users. Likewise, a malicious application could simulate the behavior of the advertising library, forging the user's interaction and effectively stealing money from the advertiser. This paper describes AdSplit, where we extended Android to allow an application and its advertising to run as separate processes, under separate user-ids, eliminating the need for applications to request permissions on behalf of their advertising libraries. We also leverage mechanisms from Quire to allow the remote server to validate the authenticity of client-side behavior. In this paper, we quantify the degree of permission bloat caused by advertising, with a study of thousands of downloaded ap...

  3. Supersymmetric Field Theories on AdS_p x S^q

    E-Print Network [OSTI]

    Aharony, Ofer; Karasik, Avner; Vaknin, Talya

    2015-01-01

    In this paper we study supersymmetric field theories on an AdS_p x S^q space-time that preserves their full supersymmetry. This is an interesting example of supersymmetry on a non-compact curved space. The supersymmetry algebra on such a space is a (p-1)-dimensional superconformal algebra, and we classify all possible algebras that can arise for p >= 3. In some AdS_3 cases more than one superconformal algebra can arise from the same field theory. We discuss in detail the special case of four dimensional field theories with N=1 and N=2 supersymmetry on AdS_3 x S^1.

  4. Ehrenfest scheme for $P-V$ criticality of higher dimensional charged black holes, rotating black holes and Gauss-Bonnet AdS black holes

    E-Print Network [OSTI]

    Mo, Jie-Xiong

    2014-01-01

    To provide an analytic verification of the nature of phase transition at the critical point of $P-V$ criticality, the original expressions of Ehrenfest equations have been introduced directly. By treating the cosmological constant and its conjugate quantity as thermodynamic pressure and volume respectively, we carry out analytical check of classical Ehrenfest equations. To show that our approach is universal, we investigate not only higher-dimensional charged AdS black holes, but also rotating AdS black holes. Not only are the examples of Einstein gravity shown, but also the example of modified gravity is presented for Gauss-Bonnet AdS black holes. The specific heat at constant pressure $C_P$, the volume expansion coefficient $\\alpha$ and the isothermal compressibility coefficient $\\kappa_T$ are found to diverge exactly at the critical point. It has been verified that both Ehrenfest equations hold at the critical point of $P-V$ criticality in the extended phase spaces of AdS black holes. So the nature of the ...

  5. Bluetooth Scatternet Formation for Single-hop Ad Hoc Networks Based on Virtual Positions 43 Bluetooth Scatternet Formation for Single-hop Ad Hoc

    E-Print Network [OSTI]

    Wang, Yu

    Bluetooth Scatternet Formation for Single-hop Ad Hoc Networks Based on Virtual Positions 43 Bluetooth Scatternet Formation for Single-hop Ad Hoc Networks Based on Virtual Positions Yu Wang , Ivan, Ontario, Canada Department of Computer Science Illinois Institute of Technology Chicago, Illinois, USA

  6. Fluorinated silica microchannel surfaces

    DOE Patents [OSTI]

    Kirby, Brian J.; Shepodd, Timothy Jon

    2005-03-15

    A method for surface modification of microchannels and capillaries. The method produces a chemically inert surface having a lowered surface free energy and improved frictional properties by attaching a fluorinated alkane group to the surface. The coating is produced by hydrolysis of a silane agent that is functionalized with either alkoxy or chloro ligands and an uncharged C.sub.3 -C.sub.10 fluorinated alkane chain. It has been found that the extent of surface coverage can be controlled by controlling the contact time from a minimum of about 2 minutes to a maximum of 120 minutes for complete surface coverage.

  7. Medical ice slurry production device

    DOE Patents [OSTI]

    Kasza, Kenneth E. (Palos Park, IL); Oras, John (Des Plaines, IL); Son, HyunJin (Naperville, IL)

    2008-06-24

    The present invention relates to an apparatus for producing sterile ice slurries for medical cooling applications. The apparatus is capable of producing highly loaded slurries suitable for delivery to targeted internal organs of a patient, such as the brain, heart, lungs, stomach, kidneys, pancreas, and others, through medical size diameter tubing. The ice slurry production apparatus includes a slurry production reservoir adapted to contain a volume of a saline solution. A flexible membrane crystallization surface is provided within the slurry production reservoir. The crystallization surface is chilled to a temperature below a freezing point of the saline solution within the reservoir such that ice particles form on the crystallization surface. A deflector in the form of a reciprocating member is provided for periodically distorting the crystallization surface and dislodging the ice particles which form on the crystallization surface. Using reservoir mixing the slurry is conditioned for easy pumping directly out of the production reservoir via medical tubing or delivery through other means such as squeeze bottles, squeeze bags, hypodermic syringes, manual hand delivery, and the like.

  8. Surface Tension of Seawater

    E-Print Network [OSTI]

    Nayar, Kishor Govind

    New measurements and a reference correlation for the surface tension of seawater at atmospheric pressure are presented in this paper. Surface tension of seawater was measured across a salinity range of 20 ? S ? 131 g/kg ...

  9. Fresnel versus Kummer surfaces

    E-Print Network [OSTI]

    Peinke, Joachim

    Fresnel versus Kummer surfaces Alberto Favaro & Friedrich W. Hehl Outline Linear media Linear media-you. Fresnel versus Kummer surfaces: geometrical optics in dispersionless linear (meta)materials and vacuum, 19­23 November 2012 Email: favaro@thp.uni-koeln.de #12;Fresnel versus Kummer surfaces Alberto Favaro

  10. Value-Added Attributes of the QA Requirements

    Office of Energy Efficiency and Renewable Energy (EERE)

    1. Senior Management Ownership Senior management must take full ownership of the quality assurance program. These managers should establish policies and objectives focused on achieving the organization's mission while improving the quality of the organization's products and services. They must create an environment that promotes quality and the improvement of quality throughout the entire organization.

  11. Hydrogen Production

    SciTech Connect (OSTI)

    2014-09-01

    This 2-page fact sheet provides a brief introduction to hydrogen production technologies. Intended for a non-technical audience, it explains how different resources and processes can be used to produce hydrogen. It includes an overview of research goals as well as “quick facts” about hydrogen energy resources and production technologies.

  12. FRW solutions and holography from uplifted AdS/CFT

    E-Print Network [OSTI]

    Xi Dong; Bart Horn; Shunji Matsuura; Eva Silverstein; Gonzalo Torroba

    2011-08-29

    Starting from concrete AdS/CFT dual pairs, one can introduce ingredients which produce cosmological solutions, including metastable de Sitter and its decay to non-accelerating FRW. We present simple FRW solutions sourced by magnetic flavor branes and analyze correlation functions and particle and brane dynamics. To obtain a holographic description, we exhibit a time-dependent warped metric on the solution and interpret the resulting redshifted region as a Lorentzian low energy effective field theory in one fewer dimension. At finite times, this theory has a finite cutoff, a propagating lower dimensional graviton and a finite covariant entropy bound, but at late times the lower dimensional Planck mass and entropy go off to infinity in a way that is dominated by contributions from the low energy effective theory. This opens up the possibility of a precise dual at late times. We reproduce the time-dependent growth of the number of degrees of freedom in the system via a count of available microscopic states in the corresponding magnetic brane construction.

  13. Engineering yeast consortia for surface-display of complex cellulosome structures

    SciTech Connect (OSTI)

    Chen, Wilfred

    2014-03-31

    As our society marches toward a more technologically advanced future, energy and environmental sustainability are some of the most challenging problems we face today. Biomass is one of the most abundant renewable-feedstock for sustainable production of biofuels. However, the main technological obstacle to more widespread uses of this resource is the lack of low-cost technologies to overcome the recalcitrant nature of the cellulosic structure, especially the hydrolysis step on highly ordered celluloses. In this proposal, we successfully engineered several efficient and inexpensive whole-cell biocatalysts in an effort to produce economically compatible and sustainable biofuels, namely cellulosic ethanol. Our approach was to display of a highly efficient cellulolytic enzyme complex, named cellulosome, on the surface of a historical ethanol producer Saccharomyces cerevisiae for the simultaneous and synergistic saccharification and fermentation of cellulose to ethanol. We first demonstrated the feasibility of assembling a mini-cellulosome by incubating E. coli lysates expressing three different cellulases. Resting cells displaying mini-cellulosomes produced 4-fold more ethanol from phosphoric acid-swollen cellulose (PASC) than cultures with only added enzymes. The flexibility to assemble the mini-cellulosome structure was further demonstrated using a synthetic yeast consortium through intracellular complementation. Direct ethanol production from PASC was demonstrated with resting cell cultures. To create a microorganism suitable for a more cost-effective process, called consolidated bioprocessing (CBP), a synthetic consortium capable of displaying mini-cellulosomes on the cell surface via intercellular complementation was created. To further improve the efficiency, a new adaptive strategy of employing anchoring and adaptor scaffoldins to amplify the number of enzymatic subunits was developed, resulting in the creation of an artificial tetravalent cellulosome on the yeast surface and a significant improvement in cellulosic ethanol production. Although this adaptive strategy is ideal for assembling more complex cellulosome for large-scale production of cellulosic ethanol, a substantially larger number of enzymes (up to 10 to 12) is needed to better mimic the natural cellulosome structures for practical usage of the technology.

  14. Surface cleanliness measurement procedure

    DOE Patents [OSTI]

    Schroder, Mark Stewart (Hendersonville, NC); Woodmansee, Donald Ernest (Simpsonville, SC); Beadie, Douglas Frank (Greenville, SC)

    2002-01-01

    A procedure and tools for quantifying surface cleanliness are described. Cleanliness of a target surface is quantified by wiping a prescribed area of the surface with a flexible, bright white cloth swatch, preferably mounted on a special tool. The cloth picks up a substantial amount of any particulate surface contamination. The amount of contamination is determined by measuring the reflectivity loss of the cloth before and after wiping on the contaminated system and comparing that loss to a previous calibration with similar contamination. In the alternative, a visual comparison of the contaminated cloth to a contamination key provides an indication of the surface cleanliness.

  15. A study of surface morphology and phase separation of polymer/cellulose liquid crystal composite membranes

    E-Print Network [OSTI]

    Tu, Mei; Han, Wanqing; Zeng, Rong; Best, Serena Michelle; Cameron, Ruth Elizabeth

    2012-08-05

    aggregates of LC domains which occurred on the surfaces of as prepared composite membranes disappeared when LC content after heat treatment. ? Fig.1. Surface texture of pure PU membrane and PU/BPC composite membranes, there are six groups of a-d, e-h, i... ?there are three groups of a-d, e-h, i-l, the LC content of each group is 10%, 30%, 50% respectively; the treatment condition for four membranes in each group is followed by as-prepared, cooling to 20°C, cooling to -20°C and natural oven-cooled To elucidate...

  16. Cognitive radio ad hoc networks (CRAHNs): Cognitive radio ad hoc networks (CRAHNs): Resource allocation techniques based on Bio-inspired computing

    E-Print Network [OSTI]

    Singh, Santosh Kumar

    2010-01-01

    Spectrum is a scarce commodity, and considering the spectrum scarcity faced by the wireless-based service providers led to high congestion levels. Technical inefficiencies from pooled spectrum (this is nothing but the "common carrier principle" adopted in oil/gas/electricity pipelines/networks.), since all ad hoc networks share a common pool of channels, exhausting the available channels will force ad hoc networks to block the services. Researchers found that cognitive radio (CR) technology may resolve the spectrum scarcity. CR network proved to next generation wireless communication system that proposed as a way to reuse under-utilised spectrum of licensee user (primary network) in an opportunistic and non-interfering basis. A CR is a self-configuring entity in a wireless networking that senses its environment, tracks changes, and frequently exchanges information with their networks. Adding this layer of such intelligence to the ad hoc network by looking at the overall geography of the network known as cogni...

  17. Adsorption and Reaction of CO2 and SO2 at a Water Surface Teresa L. Tarbuck and Geraldine L. Richmond*

    E-Print Network [OSTI]

    Richmond, Geraldine L.

    : The orientation and hydrogen bonding of water molecules in the vapor/water interfacial region in the presenceH of the solution. Surface complexes have recently been invoked to explain the initial step in a number of surface correspondence should be addressed. Phone: 541-346-4635. Fax: 541-346-5859. (1) Cotton, A. F.; Wilkinson, G. AdVanced

  18. Top Value Added Chemicals from Biomass: Volume I--Results of...

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

    Volume I--Results of Screening for Potential Candidates from Sugars and Synthesis Gas Top Value Added Chemicals from Biomass: Volume I--Results of Screening for Potential...

  19. Instability of Schwarzschild-AdS black hole in Einstein-Weyl gravity

    E-Print Network [OSTI]

    Yun Soo Myung

    2013-12-09

    We investigate the classical stability of Schwarzschild-AdS black hole in a massive theory of the Einstein-Weyl gravity. It turns out that the linearized Einstein tensor perturbations exhibit unstable modes featuring the Gregory-Laflamme instability of five-dimensional AdS black string, in contrast to the stable Schwarzschild-AdS black hole in the Einstein-Weyl gravity. We confirm that the instability of the black hole in the Einstein-Weyl gravity arises from the massiveness but not a feature of fourth-order derivative theory giving ghost states.

  20. Consequences of the partial restoration of chiral symmetry in AdS/QCD

    E-Print Network [OSTI]

    Youngman Kim; Hyun Kyu Lee

    2008-02-18

    Chiral symmetry is an essential concept in understanding QCD at low energy. We treat the chiral condensate, which measures the spontaneous breaking of chiral symmetry, as a free parameter to investigate the effect of partially restored chiral symmetry on the physical quantities in the frame work of an AdS/QCD model. We observe an interesting scaling behavior among the nucleon mass, pion decay constant and chiral condensate. We propose a phenomenological way to introduce the temperature dependence of a physical quantity in the AdS/QCD model with the thermal AdS metric.

  1. Non-equilibrium scalar two point functions in AdS/CFT

    E-Print Network [OSTI]

    Ville Keranen; Philipp Kleinert

    2015-02-24

    In the first part of the paper, we discuss different versions of the AdS/CFT dictionary out of equilibrium. We show that the Skenderis - van Rees prescription and the "extrapolate" dictionary are equivalent at the level of "in-in" two point functions of free scalar fields in arbitrary asymptotically AdS spacetimes. In the second part of the paper, we calculate two point correlation functions in dynamical spacetimes using the "extrapolate" dictionary. These calculations are performed for conformally coupled scalar fields in examples of spacetimes undergoing gravitational collapse, the AdS$_2$-Vaidya spacetime and the AdS$_3$-Vaidya spacetime, which allow us to address the problem of thermalization following a quench in the boundary field theory. The computation of the correlators is formulated as an initial value problem in the bulk spacetime. Finally, we compare our results for AdS$_3$-Vaidya to results in the previous literature obtained using the geodesic approximation and we find qualitative agreement.

  2. Saturation and Confinement: Analyticity, Unitarity and AdS/CFT Correspondence

    E-Print Network [OSTI]

    Richard C. Brower; Marko Djuric; Chung-I Tan

    2008-12-10

    In $1/N_c$ expansion, analyticity and crossing lead to crossing even and odd ($C=\\pm 1$) vacuum exchanges at high-energy, the {\\em Pomeron} and the {\\em Odderon}. We discuss how, using {\\em String/Gauge duality}, these can be identified with a reggeized {\\em Graviton} and the anti-symmetric {\\em Kalb-Ramond fields} in $AdS$ background. With confinement, these Regge singularities interpolate with glueball states. We also discuss unitarization based on eikonal sum in $AdS$.

  3. Real-time correlators in warped AdS/CFT correspondence

    E-Print Network [OSTI]

    Bin Chen; Bo Ning; Zhi-bo Xu

    2009-11-01

    We study real-time correlators in the warped AdS/CFT correspondence. We apply the prescription used in the usual AdS/CFT correspondence and obtain the retarded Green's functions for the scalar and vector fields in the spacelike warped and the null warped black hole backgrounds. We find that the retarded Green's functions and the cross sections are well consistent with the predictions from dual CFT. Our results not only support strongly the conjectured warped AdS/CFT correspondence, but also show that the usual relativistic AdS/CFT prescription of obtaining the real-time correlators remain effective in more general backgrounds with anisotropic conformal infinity.

  4. ARM Mobile Facility Surface Meteorology Handbook - October 2008

    SciTech Connect (OSTI)

    MT Ritsche

    2008-10-30

    The ARM Mobile Facility Surface Meteorology station (AMF MET) uses mainly conventional in situ sensors to obtain 1-minute statistics of surface wind speed, wind direction, air temperature, relative humidity, barometric pressure, and rain-rate. Additional sensors may be added to or removed from the base set of sensors depending upon the deployment location, climate regime or programmatic needs. Additionally, sensor types may change depending upon the climate regime of the deployment. These changes/additions are noted in the Deployment Locations and History section.

  5. Solution for "geodesic" motion of a Schwarzschild black hole along a magnetic field in AdS2 x S2 space-time

    E-Print Network [OSTI]

    Alekseev, George A

    2015-01-01

    The exact solution of Einstein - Maxwell equations for a Schwarzschild black hole immersed in the static spatially homogeneous AdS${}^2\\times\\mathbb{S}^2$ space-time of Bertotti-Robinson magnetic universe is presented. In this solution, the black hole possesses a finite initial boost in the direction of the magnetic field and performs a "geodesic" oscillating motion interacting with the background gravitational and electromagnetic fields.

  6. Biogas production from anaerobic digestion of Spirulina maxima algal biomass

    SciTech Connect (OSTI)

    Rejean Samson; Anh LeDuy

    1982-08-01

    Spirulina maxima algal biomass could be used as the sole nutrient for the production of biogas by anaerobic digestion process. It is relatively simple to adapt the municipal sewage sludge to this new substrate. The adapted sludge is very stable. Under nonoptimal conditions, the methane yield and productivity obtained were 0.26 m/sup 3//(kg VS added day) and 0.26 m/sup 3//(kg VS added day), respectively, with the semicontinuous, daily fed, anaerobic digestion having loading rate of 0.97 kg VS/(m/sup 3/ day), retention time of 33 days and temperature of 30/sup 0/C.

  7. Hydrogen Production

    Fuel Cell Technologies Publication and Product Library (EERE)

    This 2-page fact sheet provides a brief introduction to hydrogen production technologies. Intended for a non-technical audience, it explains how different resources and processes can be used to produ

  8. Minimal unitary representation of 5d superconformal algebra F(4) and AdS6/CFT5 higher spin (super)-algebras

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

    Fernando, Sudarshan; Günaydin, Murat

    2014-11-28

    We study the minimal unitary representation (minrep) of SO(5, 2), obtained by quantization of its geometric quasiconformal action, its deformations and supersymmetric extensions. The minrep of SO(5, 2) describes a massless conformal scalar field in five dimensions and admits a unique “deformation” which describes a massless conformal spinor. Scalar and spinor minreps of SO(5, 2) are the 5d analogs of Dirac’s singletons of SO(3, 2). We then construct the minimal unitary representation of the unique 5d supercon-formal algebra F(4) with the even subalgebra SO(5, 2) ×SU(2). The minrep of F(4) describes a massless conformal supermultiplet consisting of two scalar andmore »one spinor fields. We then extend our results to the construction of higher spin AdS6/CFT5 (super)-algebras. The Joseph ideal of the minrep of SO(5, 2) vanishes identically as operators and hence its enveloping algebra yields the AdS6/CFT5 bosonic higher spin algebra directly. The enveloping algebra of the spinor minrep defines a “deformed” higher spin algebra for which a deformed Joseph ideal vanishes identically as operators. These results are then extended to the construction of the unique higher spin AdS6/CFT5 superalgebra as the enveloping algebra of the minimal unitary realization of F(4) obtained by the quasiconformal methods.« less

  9. Effect of Surface Roughness on Wind Turbine Performance 

    E-Print Network [OSTI]

    Ehrmann, Robert Schaefer

    2014-06-25

    Wind farm operators observe production deficits as machines age. Quantifying deterioration on individual components is difficult, but one potential explanation is accumulation of blade surface roughness. Historically, wind turbine airfoils were...

  10. Reducing carbon dioxide to products

    DOE Patents [OSTI]

    Cole, Emily Barton; Sivasankar, Narayanappa; Parajuli, Rishi; Keets, Kate A

    2014-09-30

    A method reducing carbon dioxide to one or more products may include steps (A) to (C). Step (A) may bubble said carbon dioxide into a solution of an electrolyte and a catalyst in a divided electrochemical cell. The divided electrochemical cell may include an anode in a first cell compartment and a cathode in a second cell compartment. The cathode may reduce said carbon dioxide into said products. Step (B) may adjust one or more of (a) a cathode material, (b) a surface morphology of said cathode, (c) said electrolyte, (d) a manner in which said carbon dioxide is bubbled, (e), a pH level of said solution, and (f) an electrical potential of said divided electrochemical cell, to vary at least one of (i) which of said products is produced and (ii) a faradaic yield of said products. Step (C) may separate said products from said solution.

  11. Surface modification to waveguides

    DOE Patents [OSTI]

    Timberlake, John R. (Allentown, NJ); Ruzic, David N. (Kendall Park, NJ); Moore, Richard L. (Princeton, NJ); Cohen, Samuel A. (Pennington, NJ); Manos, Dennis M. (Lawrenceville, NJ)

    1983-01-01

    A method of treating the interior surfaces of a waveguide to improve power transmission comprising the steps of mechanically polishing to remove surface protrusions; electropolishing to remove embedded particles; ultrasonically cleaning to remove any residue; coating the interior waveguide surfaces with an alkyd resin solution or electrophoretically depositing carbon lamp black suspended in an alkyd resin solution to form a 1.mu. to 5.mu. thick film; vacuum pyrolyzing the film to form a uniform adherent carbon coating.

  12. Surface modification to waveguides

    DOE Patents [OSTI]

    Timberlake, J.R.; Ruzic, D.N.; Moore, R.L.; Cohen, S.A.; Manos, D.M.

    1982-06-16

    A method is described for treating the interior surfaces of a waveguide to improve power transmission comprising the steps of mechanically polishing to remove surface protrusions; electropolishing to remove embedded particles; ultrasonically cleaning to remove any residue; coating the interior waveguide surfaces with an alkyd resin solution or electrophoretically depositing carbon lamp black suspended in an alkyd resin solution to form a 1..mu.. to 5..mu.. thick film; vacuum pyrolyzing the film to form a uniform adherent carbon coating.

  13. Noncommutative Riemann Surfaces

    E-Print Network [OSTI]

    Joakim Arnlind; Martin Bordemann; Laurent Hofer; Jens Hoppe; Hidehiko Shimada

    2007-11-16

    We introduce C-Algebras of compact Riemann surfaces $\\Sigma$ as non-commutative analogues of the Poisson algebra of smooth functions on $\\Sigma$. Representations of these algebras give rise to sequences of matrix-algebras for which matrix-commutators converge to Poisson-brackets as $N\\to\\infty$. For a particular class of surfaces, nicely interpolating between spheres and tori, we completely characterize (even for the intermediate singular surface) all finite dimensional representations of the corresponding C-algebras.

  14. Method for determining surface properties of microparticles

    DOE Patents [OSTI]

    Eisenthal, Kenneth B. (Ridgewood, NJ)

    2000-01-01

    Second harmonic generation (SHG), sum frequency generation (SFG) and difference frequency generation (DFG) can be used for surface analysis or characterization of microparticles having a non-metallic surface feature. The microparticles can be centrosymmetric or such that non-metallic molecules of interest are centrosymmetrically distributed inside and outside the microparticles but not at the surface of the microparticles where the asymmetry aligns the molecules. The signal is quadratic in incident laser intensity or proportional to the product of two incident laser intensities for SFG, it is sharply peaked at the second harmonic wavelength, quadratic in the density of molecules adsorbed onto the microparticle surface, and linear in microparticles density. In medical or pharmacological applications, molecules of interest may be of drugs or toxins, for example.

  15. Low-rank coal oil agglomeration product and process

    DOE Patents [OSTI]

    Knudson, C.L.; Timpe, R.C.; Potas, T.A.; DeWall, R.A.; Musich, M.A.

    1992-11-10

    A selectively-sized, raw, low-rank coal is processed to produce a low ash and relative water-free agglomerate with an enhanced heating value and a hardness sufficient to produce a non-degradable, shippable fuel. The low-rank coal is treated, under high shear conditions, in the first stage to cause ash reduction and subsequent surface modification which is necessary to facilitate agglomerate formation. In the second stage the treated low-rank coal is contacted with bridging and binding oils under low shear conditions to produce agglomerates of selected size. The bridging and binding oils may be coal or petroleum derived. The process incorporates a thermal deoiling step whereby the bridging oil may be completely or partially recovered from the agglomerate; whereas, partial recovery of the bridging oil functions to leave as an agglomerate binder, the heavy constituents of the bridging oil. The recovered oil is suitable for recycling to the agglomeration step or can serve as a value-added product.

  16. Low-rank coal oil agglomeration product and process

    DOE Patents [OSTI]

    Knudson, Curtis L. (Grand Forks, ND); Timpe, Ronald C. (Grand Forks, ND); Potas, Todd A. (Plymouth, MN); DeWall, Raymond A. (Grand Forks, ND); Musich, Mark A. (Grand Forks, ND)

    1992-01-01

    A selectively-sized, raw, low-rank coal is processed to produce a low ash and relative water-free agglomerate with an enhanced heating value and a hardness sufficient to produce a non-decrepitating, shippable fuel. The low-rank coal is treated, under high shear conditions, in the first stage to cause ash reduction and subsequent surface modification which is necessary to facilitate agglomerate formation. In the second stage the treated low-rank coal is contacted with bridging and binding oils under low shear conditions to produce agglomerates of selected size. The bridging and binding oils may be coal or petroleum derived. The process incorporates a thermal deoiling step whereby the bridging oil may be completely or partially recovered from the agglomerate; whereas, partial recovery of the bridging oil functions to leave as an agglomerate binder, the heavy constituents of the bridging oil. The recovered oil is suitable for recycling to the agglomeration step or can serve as a value-added product.

  17. Method of producing adherent metal oxide coatings on metallic surfaces

    DOE Patents [OSTI]

    Lane, Michael H. (Clifton Park, NY); Varrin, Jr., Robert D. (McLean, VA)

    2001-01-01

    Provided is a process of producing an adherent synthetic corrosion product (sludge) coating on metallic surfaces. The method involves a chemical reaction between a dry solid powder mixture of at least one reactive metal oxide with orthophosphoric acid to produce a coating in which the particles are bound together and the matrix is adherent to the metallic surface.

  18. Cartilage defect repair by osteochondral allografts : role of tissue surfaces and interfaces

    E-Print Network [OSTI]

    Pallante, Andrea L.

    2012-01-01

    Effect of transplantation of OCA on lubricant properties ofProduction of the lubricant, proteoglycan-4 (PRG4), fromas a biomechanical lubricant of the articular surface, as

  19. On the Connectivity in One-Dimensional Ad Hoc Wireless Networks with a Forbidden Zone

    E-Print Network [OSTI]

    On the Connectivity in One-Dimensional Ad Hoc Wireless Networks with a Forbidden Zone Xiaodong Hu1 This paper investigates the connectivity in one-dimensional ad hoc wireless networks with a forbidden zone. We derive the probability of the wireless networks which are composed of exactly m clusters by means

  20. SANS: A Simple Ad Hoc Network Simulator Nicolas Burri, Roger Wattenhofer, Yves Weber, Aaron Zollinger

    E-Print Network [OSTI]

    SANS: A Simple Ad Hoc Network Simulator Nicolas Burri, Roger Wattenhofer, Yves Weber, Aaron present a Simple Ad Hoc Network Simulator SANS particularly intended for the simulation of distributed the concepts and correct usage of SANS as a development, debugging, testing and presentation tool. Together