Sample records for oped undevel oped

  1. April 29, 2006 OP-ED CONTRIBUTOR

    E-Print Network [OSTI]

    April 29, 2006 OP-ED CONTRIBUTOR Net Gains By JEFFREY D. SACHS AMERICANS have a perfect retort to Osama Bin Laden's call for expanding the terrorism war to Sudan. We should respond by showing our with the distribution of long-lasting insecticide-treated bed nets to each household with children who came

  2. Op-Ed by Secretary of Energy Steven Chu and Secretary of Labor...

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

    Economy April 22, 2009 - 12:00am Addthis To commemorate Earth Day, the op-ed below on green jobs and energy independence by Secretaries Steven Chu and Hilda Solis ran in the...

  3. Secretary Chu's Weatherization Op-Ed in the Huffington Post | 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 onYouTube YouTube Note: Since the.pdfBreakingMay 2015ParentsMiddle SchoolPhysicsDelivery |Energy Weatherization Op-Ed

  4. This guidance on childhood lead screening was devel-oped by CDC in consultation with the members and

    E-Print Network [OSTI]

    preface This guidance on childhood lead screening was devel- oped by CDC in consultation with the members and consultants of the Advisory Committee on Childhood Lead poisoning prevention. The committee-care organizations, academia, and non-governmental agencies working on affordable hous- ing and public lead poisoning

  5. Three-gluon running coupling from lattice QCD at $N_f=2+1+1$: a consistency check of the OPE approach

    E-Print Network [OSTI]

    Ph. Boucaud; M. Brinet; F. De Soto; V. Morenas; O. Pčne; K. Petrov; J. Rodríguez-Quintero

    2014-01-31T23:59:59.000Z

    We present a lattice calculation of the renormalized running coupling constant in symmetric (MOM) and asymmetric ($\\widetilde{\\rm MOM}$) momentum substraction schemes including $u$, $d$, $s$ and $c$ quarks in the sea. An Operator Product Expansion dominated by the dimension-two $\\langle A^2\\rangle$ condensate is used to fit the running of the coupling. We argue that the agreement in the predicted $\\langle A^2\\rangle$ condensate for both schemes is a strong support for the validity of the OPE approach and the effect of this non-gauge invariant condensate over the running of the strong coupling.

  6. March 15, 2009 OP-ED COLUMNIST

    E-Print Network [OSTI]

    then be harnessed to heat up liquid salt and produce massive amounts of steam to drive a turbine and create who has a duck in his basement that paddles a wheel, blows up a balloon, turns a turbine and creates

  7. June 5, 2004 OP-ED CONTRIBUTOR

    E-Print Network [OSTI]

    to speak with in senior positions of government. When an economic crisis pushed Bolivia's democratically places like Bolivia or Ethiopia is considered hopelessly soft or politically irrelevant in high

  8. Op-Ed Contributor How Seawater Can Power the World

    E-Print Network [OSTI]

    . It is essentially inexhaustible and it can be created using hydrogen isotopes -- chemical cousins of hydrogen, like. The development of fusion energy is one of the most difficult science and engineering challenges ever undertaken a hot plasma indefinitely, like a sun, the second approach resembles an internal combustion engine

  9. Search All NYTimes.com OP-ED CONTRIBUTOR

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to Afghanistan, Karl Eikenberry, insisted that President Obama's revised war strategy will "build support operations. Its lethal agents are being systematically hunted down, while those Muslims whose souls it seeks

  10. Tri-City Herald OpEd: Electric Vehicles are a smart choice

    SciTech Connect (OSTI)

    Christensen, Peter C.; Haas, Anne M.

    2010-12-10T23:59:59.000Z

    Why are so many of us at the Pacific Northwest National Laboratory, a national thought leader in power industry issues located right here in the Tri-Cities, so bullish on the future of EVs? And why do we think it's so important that this country, especially THIS part of the country, be leaders in the adoption of EVs? Is it that we all just happen to like driving polluting golf carts? The answer is that, like most everyone else, most of us here at PNNL drive to work every day, and like most people, we care about the cost of gasoline and the impact that burning imported oil has on the environment and on our foreign policy. The reality is that electric vehicles are simply more efficient, pollute much less, use locally-generated energy, and cost MUCH less to drive.

  11. Op-Ed Contributor: A Leaner, Meaner Jihad Read Times articles

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    and perhaps tactical operations among themselves. But for the most part the factions are swarming on their own

  12. WC_2000_003_CLASS_WAIVER_FOR_BWXT_UNDER_A_MANAGEMENT_AND_OPE...

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

    NDERAMANAGEMENTANDOPE.pdf More Documents & Publications ClassWaiverWC-2000-003.pdf WC2000004CLASSWAIVERMadeinthePerformanceofCRADAby.pdf ClassWaiverWC-2000-004...

  13. Genome Data from DOOR: a Database for prOkaryotic OpeRons

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

    DOOR provides an Organism View for browsing, a gene search tool, an operon search tool, and the operon prediction interface.[Text taken and edited from http://csbl1.bmb.uga.edu/OperonDB/tutorial.php

  14. Op-Ed by Secretary of Energy Steven Chu and Secretary of Labor Hilda Solis:

    Office of Environmental Management (EM)

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently Asked QuestionsDepartmentGas and Oil ResearchEnergyOn October

  15. Secretary Chu Op-Ed on Energy Efficiency from the World Economic Forum |

    Energy Savers [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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO Overview OCHCO OverviewRepository |Complex" at Los|North CarolinaDepartment of

  16. Secretary Chu Op-Ed on Small Modular Reactors in the Wall Street Journal |

    Energy Savers [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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO Overview OCHCO OverviewRepository |Complex" at Los|North CarolinaDepartment

  17. Op-Ed by Secretary of Energy Steven Chu and Secretary of Labor Hilda Solis:

    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 onYouTube YouTube Note: Since the.pdfBreaking ofOilNEWResponse toOctober 2014Funds for Clean CitiesARM,OnlineOokie

  18. Secretary Chu's Op-Ed on Small Modular Reactors in the Wall Street Journal

    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 DataDepartment of Energy Your Density Isn'tOriginEducationVideo »Usage »DownloadSolarSequestrationof theWebchatRequestDepartment ofChu's|

  19. Secretary Chu's Weatherization Op-Ed in the Huffington Post | 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 DataDepartment of Energy Your Density Isn'tOriginEducationVideo »Usage »DownloadSolarSequestrationofPrepared for Delivery |Energy

  20. Deputy Secretary Daniel Poneman USA Today Op-Ed September 13, 2011 |

    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 DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197E T A * S H I E L D * ASubcommittee on Financial

  1. "Made in the USA" can be Revitalized San Jose Mercury News Op-Ed, 24 October, 2007

    E-Print Network [OSTI]

    O'Brien, James F.

    in this vital sector of the US economy. Such a research program would benefit health care, agriculture, and transportation, and strengthen our national resources in defense, energy, and security. The resulting flurry years. Ken Goldberg (UC Berkeley) and Vijay Kumar (UPenn) With input from Ruzena Bajcsy (UC

  2. Monday, April 1st, 2013 Home TopNews BC/Canada Bollywood Sports Business Travel Lifestyle BCElection Bloggers Entertainment News OP-ED

    E-Print Network [OSTI]

    Harinarayana, T.

    daybyday, the price of land and its availabilityare constraints in the development of solar power scientists gets the government's approval. The proposal is the brainchild of scientists at the Gujarat Energy of Energy, Environment and Engineering, the scientists sayhighways can be used to generate solar power

  3. http://www.boston.com/bostonglobe/editorial_opinion/oped/articles/2008/01/02/the_wrong_choice_for_massachusetts/ The wrong choice for Massachusetts

    E-Print Network [OSTI]

    Hansen, James E.

    Communities Act" - in most respects a good piece of legislation - provides incentives for coal gasification to a project extending the life of an 80-year-old coal plant with coal gasification that would not capture fuel, converting the plant's boiler to "plasma gasification" of coal. NRG and state officials have

  4. 418.ps

    E-Print Network [OSTI]

    Dec 10, 2001 ... (yair@math.haifa.ac.il). Tommy Elfving. Department of Mathematics, Link oping University,. SE-581 83 Link oping, Sweden. (toelf@mai.liu.se).

  5. METRIC SPACES (MATH0041): PROBLEM SHEET 4, Solutions 1. If x 2 Y Othen there exists ffl > 0 such that Bffl(x) Y O, since Y Ois ope*

    E-Print Network [OSTI]

    Sankaran, Gregory R.

    ) but AO [ BO = (-1, 0 [ (0* *, 1). A~[ ~Bis closed and contains A [ B so it contains ______A.[ BWe also

  6. Curriculum vitae---Michael Patriksson 6412211911 PERSONAL DATA

    E-Print Network [OSTI]

    Patriksson, Michael

    , Seattle, WA, USA 1988--1991 Licentiate of Philosophy, Division of Optimization, Department of Mathe­ matics, LinkË?oping University, LinkË?oping Title of Licentiate Thesis: Algorithms for Urban Tra#c Network

  7. 19 gennaio 2007 N. di Matricola: 00101 Marcare con una crocetta le risposte ritenute corrette e consegnare la scheda al termine della prima

    E-Print Network [OSTI]

    Frosini, Patrizio

    'insieme delle matrici reali 4 × 4 con traccia positiva `e un gruppo rispetto alla usuale ope- razione di

  8. A Degrading Way to Make an Organ

    E-Print Network [OSTI]

    Hardin, Jeff

    the figure). Both laser ablation (4) and genetic analyses (5, 6) indicate that the shape of the devel oping

  9. 5/11/10 7:21 AMOp-Ed Contributors -Plan B in the Gulf -NYTimes.com Page 1 of 3http://www.nytimes.com/2010/05/11/opinion/11oped2.html?sq=hazen&st=cse&scp=1&pagewanted=print

    E-Print Network [OSTI]

    Hazen, Terry

    the weekend BP learned that its latest effort at stanching the Deepwater Horizon oil spill -- placing a huge catastrophes. Avoid Dispersants ONE of the oil industry's favorite tools in fighting oil spills is chemical the Exxon Valdez spill in 1989, came with warning labels: "prevent liquid from entering sewers, watercourses

  10. Electrochemical Synthesis and Structural Characterization of Titania Nanotubes

    E-Print Network [OSTI]

    Nguyen, Que Anh

    2010-01-01T23:59:59.000Z

    such as sensors, dye sensitized solar cells, and batteriesmaterial in dye sensitized solar cells [Zhu et al. , 2007;et al. , 2007]. Dye sensitized solar cells, as devel- oped

  11. ANALYSIS OF THE PERFORMANCE AND COST EFFECTIVENESS OF NINE SMALL WIND ENERGY CONVERSION SYSTEMS FUNDED BY THE DOE SMALL GRANTS PROGRAM

    E-Print Network [OSTI]

    Kay, J.

    2009-01-01T23:59:59.000Z

    alia, February 1981, Battery Storage Side Holbrook, Ope cit.on-site may find Two battery storage economically feasibleuse as low as possible. Battery storage would help regulate

  12. Determining the lowest-cost hydrogen delivery mode

    E-Print Network [OSTI]

    Yang, Christopher; Ogden, Joan M

    2007-01-01T23:59:59.000Z

    costs to estimate hydrogen pipeline costs. Davis, CA: ITS-hydrogen. The cost of hydrogen pipeline delivery de- pendshydrogen trucks, and hydrogen pipelines, were devel- oped

  13. Determining the lowest-cost hydrogen delivery mode

    E-Print Network [OSTI]

    Yang, Christopher; Ogden, Joan M

    2007-01-01T23:59:59.000Z

    costs to estimate hydrogen pipeline costs. Davis, CA: ITS-hydrogen trucks, and hydrogen pipelines, were devel- opedFor large amounts of hydrogen, pipeline transmission is pre-

  14. E-Print Network 3.0 - advanced reactor technology Sample Search...

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

    Op-ed Letters... to iron out their differences over the site of the International Thermonuclear Experimental Reactor... . Russia sticks to its guns, backs France for fusion...

  15. acid improves global: Topics by E-print Network

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

    Global methodology in control architecture to improve mobile robot reliability B. Durand, K. Godary a global methodology devel- oped to increase the reliability of mobile...

  16. Construction of operator product expansion coefficients via consistency conditions

    E-Print Network [OSTI]

    Jan Holland

    2009-06-30T23:59:59.000Z

    In this thesis an iterative scheme for the construction of operator product expansion (OPE) coefficients is applied to determine low order coefficients in perturbation theory for a specific toy model. We use the approach to quantum field theory proposed by S. Hollands [arXiv:0802.2198], which is centered around the OPE and a number of axioms on the corresponding OPE coefficients. This framework is reviewed in the first part of the thesis. In the second part we apply an algorithm for the perturbative construction of OPE coefficients to a toy model: Euclidean $\\varphi^6$-theory in 3-dimensions. Using a recently found formulation in terms of vertex operators and a diagrammatic notation in terms of trees [arXiv:0906.5313v1], coefficients up to second order are constructed, some general features of coefficients at arbitrary order are presented and an exemplary comparison to the corresponding customary method of computation is given.

  17. Eos, Vol. 93, No. 5, 31 January 2011 Blooms of the toxic marine dinoflagel-

    E-Print Network [OSTI]

    Meyers, Steven D.

    ). Collaborative Response to a HAB Event in Campeche The rapid response capability of the binational and local partnerships was tested recently when a massive HAB devel- oped off Campeche, Mexico, following the passage

  18. CONCURRENCY:PRACTICE & EXPERIENCE, 4(4), 269291 (JUNE 1992) PARALLELIZING THE SPECTRAL TRANSFORM METHOD

    E-Print Network [OSTI]

    modeling. In particular, it is used in CCM1 and CCM2, the Community Climate Models developed]. In particular, it is used in CCM1, the Community Climate Model devel­ oped at the National Center

  19. Temporal Structure of ENSO in 20th Century Climate Simulations

    E-Print Network [OSTI]

    Wittenberg, Andrew

    .Wittenberg@noaa.gov Simona Masina, Istituto Nazionale di Geofisica e Vulcanologia, Bologna Italy, Masina in the CGCMs. The ocean analysis devel- oped at the Istituto Nazionale di Geofisica e Vulcanologia (INGV

  20. Indoor climate and productivity in office buildings

    E-Print Network [OSTI]

    Schiavon, Stefano; Zecchin, Roberto

    2009-01-01T23:59:59.000Z

    in improved of the potential heat stress and open-plan re-ope- Medicine, n. 4. heat stress on the Swedish Instituteed. on pairs of stresses: mild heat and low-frequency of

  1. IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 8, NO. 4, JULY/AUGUST 2002 935 3-D Photonic Circuit Technology

    E-Print Network [OSTI]

    Bowers, John

    IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 8, NO. 4, JULY/AUGUST 2002 935 3-D devel- oped today. By making the leap to multilayer interconnects, more compact devices can be obtained

  2. Role-based Object Constraint Programming

    E-Print Network [OSTI]

    Schmidt, Douglas C.

    , schmidt}@dre.vanderbilt.edu 2 Siemens AG, Corporate Technology (SE 2) {andrey.nechypurenko, egon.wuchner}@siemens transformations on data encapsulated in multiple features. To address these challenges, we devel- oped an approach

  3. Copyright 1998 by the Genetics Society of America High-Efficiency Transformation of Chlamydomonas reinhardtii by Electroporation

    E-Print Network [OSTI]

    /chloroplast interactions for the stable introduction of DNA into the nuclear genome(Kindle 1990).This method) or the lithium ace- oped and used to dissect the regulation of various pro- tate/single-stranded DNA

  4. I. Introduction Simulation Modeling

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    -scale system studies such as environmental systems [29]or nuclear fuel waste management programs [7], which indicated that over a half-billion dollars are being spent annually on devel- oping, using, and maintaining

  5. The Analytic Bootstrap and AdS Superhorizon Locality

    E-Print Network [OSTI]

    A. Liam Fitzpatrick; Jared Kaplan; David Poland; David Simmons-Duffin

    2013-01-24T23:59:59.000Z

    We take an analytic approach to the CFT bootstrap, studying the 4-pt correlators of d > 2 dimensional CFTs in an Eikonal-type limit, where the conformal cross ratios satisfy |u| 2\\Delta_\\phi + 2n for each integer n as l -> infinity. We show how the rate of approach is controlled by the twist and OPE coefficient of the leading twist operator in the \\phi x \\phi OPE, and we discuss SCFTs and the 3d Ising Model as examples. Additionally, we show that the OPE coefficients of other large spin operators appearing in the OPE are bounded as l -> infinity. We interpret these results as a statement about superhorizon locality in AdS for general CFTs.

  6. Fish life in the kelp beds and the effects of kelp harvesting

    E-Print Network [OSTI]

    Limbaugh, Conrad

    1955-01-01T23:59:59.000Z

    m Organisms of t h e mid -kelp b l o t ope . . . . . . . . .E f f e c t s of Harvesting on Kelp Beds . . . . . . . . .E f f e c t s of Kelp Harvesting on F i s h

  7. Multi-modal Transportation > Highway Transportation > Trucking > Railroad transportation > Public transit > Rural transportation > Rural transit > Freig pipeline transportation > Airport planning and development > Airport maintenance > Bicycle and pedestr

    E-Print Network [OSTI]

    Multi-modal Transportation > Highway Transportation > Trucking > Railroad transportation > Public transit > Rural transportation > Rural transit > Freig pipeline transportation > Airport planning and development > Airport maintenance > Bicycle and pedestrian > Ports and waterways >>> Transportation ope

  8. Microwave synthesized magnetic tubular carbon nanocomposite fabrics toward electrochemical energy

    E-Print Network [OSTI]

    Guo, John Zhanhu

    - oping supercapacitors with high power supply, long term stability and environmental benign nature. Depending on the electroactivity of electrode materials, supercapacitors could be either electrostatic between electrode and electrolyte.1 The current FS supercapacitors usually suffer from low power density

  9. Immigration Outside the Law

    E-Print Network [OSTI]

    Motomura, Hiroshi

    2008-01-01T23:59:59.000Z

    Op-Ed. , What Part of ‘Illegal’ Don’t You Understand? , N.Y.protection applies to illegal aliens); Hiroshi Motomura,dealt with the 12 million illegal immigrants already here,

  10. Interaction Support for Visual Comparison Inspired by Natural Behavior

    E-Print Network [OSTI]

    Tominski, Christian

    Forsell, and Jimmy Johansson Fig. 1. Folding interaction to reveal and relate information shown, e-mail: camilla.forsell@liu.se. · Jimmy Johansson is with Link¨oping University, e-mail: jimmy

  11. FYI: July 2, 1975 - Decembert 31, 1975

    E-Print Network [OSTI]

    1975-01-01T23:59:59.000Z

    tim e s, since Mail Room staff have to interrupt their work to unlock the door. In addition, please use the stack elevators (hopefully the recurring disease of the West Elevator is not chronic) rather than having Mail Room personnel key the public... elevator for you. Personnel: Resignation: Pat Henry, Clerk III in the bibliographic section of Cataloging has resigned effective August 15. .' Ope~ing: Staff melnbers interested in applying for promotion or transfer to the Clerk III , biblio­ graphic...

  12. and Theoretical Physics Group, Mail Stop 50A-5101

    E-Print Network [OSTI]

    Kostas Skenderis; Instituut Voor Theoretische Fysica

    1997-01-01T23:59:59.000Z

    A new heterotic N = 2 string with manifest target space supersymmetry is constructed by combining a conventional N = 2 string in the right-moving sector and a Green-Schwarz-Berkovits type string in the left-moving sector. The corresponding sigma model is then obtained by turning on background fields for the massless excitations. We compute the beta functions and we partially check the OPE’s of the superconformal algebra perturbatively in ? ? , all in superspace. The resulting field equations describe N = 1 self-dual supergravity. 1

  13. Higher Spin Currents in Wolf Space: Part III

    E-Print Network [OSTI]

    Ahn, Changhyun

    2015-01-01T23:59:59.000Z

    The large N=4 linear superconformal algebra (generated by four spin-1/2 currents, seven spin-1 currents, four spin-3/2 currents and one spin-2 current) found by Sevrin, Troost and Van Proeyen (and other groups) was realized in the N=4 superconformal coset SU(5)/SU(3) theory previously. The lowest 16 higher spin currents of spins (1, 3/2, 3/2, 2), (3/2, 2, 2, 5/2), (3/2, 2, 2, 5/2) and (2, 5/2, 5/2, 3) are obtained by starting with the operator product expansions (OPEs) between the four spin-3/2 currents from the above large N=4 linear superconformal algebra and the lowest higher spin-1 current which is the same as the one in the Wolf space coset SU(5)/[SU(3) x SU(2) x U(1)] theory. These OPEs determine the four higher spin-3/2 currents and the next six higher spin-2 currents are obtained from the OPEs between the above four spin-3/2 currents associated with the N=4 supersymmetry and these four higher spin-3/2 currents. The four higher spin-5/2 currents can be determined by calculating the OPEs between the abo...

  14. A Reformed Mathematics Education at Chalmers Stig Larsson

    E-Print Network [OSTI]

    Larsson, Stig

    A Reformed Mathematics Education at Chalmers Stig Larsson Department of Mathematics Chalmers@math.chalmers.se Kvalitetskonferensen, Norrk¨oping, September 25­27, 2001 Abstract Engineering education faces the challenge to reform to effectively use the new tools offered by computers. We present a program for a reformed engineering

  15. Towards Software Product Lines Application in the Context of a Smart Building Project

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Towards Software Product Lines Application in the Context of a Smart Building Project Thibaut. This paper presents proposals on how to apply software prod- uct lines in the context of smart buildings the various components involved in smart buildings, and to capitalize on the devel- oped IT components

  16. "teclicthesisswe" --2013/3/25 --11:25 --page i --#1 Linkoping Studies in Science and Technology

    E-Print Network [OSTI]

    Zhao, Yuxiao

    and Technology Licentiate Thesis No. THESISNUMBER SWEDISHTITLE av AUTHOR Framlagd vid Link¨opings tekniska h/3/25 -- 11:25 -- page ii -- #2 This is a Swedish Licentiate's Thesis Swedish postgraduate education leads to a doctor's degree and/or a licentiate's degree. A doctor's degree comprises 240 ECTS credits (4 year

  17. Curriculum vitae Jacek MALEC

    E-Print Network [OSTI]

    of Bergen, Norway, in June 2004. In December 2000 I served as the opponent for the licentiate thesis defense, Man Lin, has presented her licentiate thesis at the University of Link¨oping in 1997 and successfully de- fended their licentiate theses (Magnus Morin, 1992, Per ¨Osterling, 1993, and Anders Ekman, 1996

  18. III The Virtual Internet and Telecom-munications Laboratory of Switzerland

    E-Print Network [OSTI]

    Braun, Torsten

    consisting of multiple independ- ent but complementary modules devel- oped under strict didactics on module content, designed the VITELS architecture and is an author of the VITELS Didactics and Design within the VITELS project and is an author of the VITELS Didactics and Design Guide. Lab Lab Lab Lab EIF

  19. Recognition efficiency issues for freehand sketches Tevfik Metin Sezgin MTSEZGIN@AI.MIT.EDU

    E-Print Network [OSTI]

    Sezgin, Metin

    tree search and subgraph isomorphism perform were not devel- oped with this "recognize as we go recognition methods in the literature perform a search either in the correspondence space, the transformation correspondece space search algorithm ­ namely a variant of the interpretation tree (IT) algorithm ­ performs

  20. Seminar Robust Optimization Marc Goerigk, Corinna Kaufmann WS 13/14, TU KL

    E-Print Network [OSTI]

    Krumke, Sven O.

    , Mat´us Mihal'´ak, and Rajeev Raman. Computing minimum spanning trees with uncertainty. arXiv preprint ) Light Robustness Koller, Kathrin. [FM09, GSS+ 13] ( 6 ) Minmax Regret Spanning Tree Schreiber, Yvonne stochastic and adaptive optimization. MATHEMATICS OF OPE- RATIONS RESEARCH, 36(1):24­54, 2011. [BKK11

  1. On Constructing Homomorphic Encryption Schemes from Coding Theory

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    on Reed-Muller codes where for µ = 2 and µ = 3 and security levels between 80 and 128 bits, all operations Homomorphic encryption schemes are very useful cryptographic tools that en- able secure computation (PIR) [35], oblivious polynomial evalu- ation (OPE) [39], or multiparty computation [18]. The work

  2. International Conference of Modeling, Optimization and Simulation -MOSIM'12 June 6-8, 2012 -Bordeaux -France

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    manufacturers. While many models of hybrid cars have been devel- oped and put on the market in the last few Environment for Assessing Power Management Strategies in Hybrid Motorcycles Alessandro Beghi, Fabio Maran of transportation systems is a world wide priority. Hybrid propulsion vehicles have proved to have a strong

  3. 2 of 11 DOCUMENTS The Washington Post

    E-Print Network [OSTI]

    Deutch, John

    On Global Warming John Deutch SECTION: OP-ED; Pg. A27 LENGTH: 1346 words I believe that what we know now about global warming justifies imposition of a modest tax on carbon emissions by the United States away from electricity generated from coal -- will have major economic impacts, at least during

  4. Computational pproach to the Statistical echanics of rotein ol ing

    E-Print Network [OSTI]

    Istrail, Sorin

    , 1995 bstract A statistical mechanical approach to the protein folding problem is devel- oped based of the statistical mechanics of protein folding by com- puter simulation. Even though we have taken advantage of new". A theoretical understanding of the protein-folding problem, i.e. how proteins fold to their native states from

  5. Encoding Molecular Motions in Voxel Maps Juan Cortes, Sophie Barbe, Monique Erard and Thierry Simeon

    E-Print Network [OSTI]

    Cortés, Juan

    1 Encoding Molecular Motions in Voxel Maps Juan Cort´es, Sophie Barbe, Monique Erard and Thierry] have been devel- oped to overcome the limitations of MD. Such methods present however a major drawback, France sbarbe@insa-toulouse.fr M. Erard is with the IPBS, F-31077 Toulouse, France monique

  6. Mechanical Inhibition of Foam Formation via a Rotating Nozzle

    E-Print Network [OSTI]

    Ristenpart, William

    have been devel- oped to minimize the impact of foams [2]. Anti-foaming agents are added to prevent environmental disposal problems, and increase the overall process cost and complexity [3]. Non report a design for a rotating nozzle that prevents successive collocated impacts, thereby minimizing

  7. SOFTWARE Open Access MT-Toolbox: improved amplicon sequencing using

    E-Print Network [OSTI]

    Dangl, Jeff

    maximization. It can be run in serial on a standard personal computer or in parallel on a Load Sharing Facility from sequences sharing the same tag enables inference of original template molecules thereby reducing quantification of sequences. To ad- dress these limitations several methods have been devel- oped where randomly

  8. Sunday, June 20, 2004 SPORTS LIFE

    E-Print Network [OSTI]

    - Gourmet Art - Books - Photography - Dance - Theater - Crafts Op-Ed - Letters Cartoons Weekly round up nations failed Friday to forge an accord on whether to build the world's first prototype nuclear fusion reactor in France or Japan. Decision on site for fusion reactor put off again In a meeting of sub

  9. 8 | harriman magazine By ROnALD MEyER

    E-Print Network [OSTI]

    Qian, Ning

    for just over a year now, stationed in both Washington, D.C., and Almaty, Kazakhstan. What is the mission about economic development in Kazakhstan. The article you're referring to was an op-ed I produced for the EUROBAK (European Business Association of Kazakhstan) Global Monitor, a business magazine based

  10. Accomplishments and Remaining Challenges: THREDDS Data Server and

    E-Print Network [OSTI]

    Accomplishments and Remaining Challenges: THREDDS Data Server and Common Data Model Ethan Davis Unidata Policy Committee Meeting 23-24 May 2011 #12;THREDDS Data Server (TDS) · Web server for scientific;THREDDS Data Server (TDS) · ... · Data access services: ­ OPeNDAP ­ OGC WMS and WCS ­ NCSS · Data

  11. s a signatory to the United Nations Framework Convention on Climate

    E-Print Network [OSTI]

    the economic growth needed to finance investment in new, clean energy technologies. The administration-term challenge, the Bush administration recognizes that there are cost-effective steps we can take now. Near, the administration has devel- oped an array of policy measures, including financial incentives and voluntary programs

  12. A GPU-Like Soft Processor for High-Throughput Acceleration

    E-Print Network [OSTI]

    Steffan, J. Gregory

    into a blade server platform, and XtremeData and Nallatech that offer FPGA accelerator modules that can of the implementation, testing, and debugging required for devel- oping real hardware. Behavioral synthesis techniques the advantages of (i) supporting a familiar programming model and environment and (ii) being portable across

  13. Summary of findings from the Biomass Refining Consortium for Applied Fundamentals and Innovation (CAFI): corn

    E-Print Network [OSTI]

    California at Riverside, University of

    employed to develop comparative sugar yield data for each pretreatment and subsequent enzymatic hydrolysis (CAFI): corn stover pretreatment Richard T. Elander Ć Bruce E. Dale Ć Mark Holtzapple Ć Michael R, has devel- oped comparative data on the conversion of corn stover to sugars by several leading

  14. Combined Use of Magnetic and Electrically Conductive Fillers in a Polymer Matrix for Electromagnetic Interference Shielding

    E-Print Network [OSTI]

    Chung, Deborah D.L.

    by radiofrequency radiation (such as that emitted by a cellular phone), there is a growing need for devel- oping) shielding refers to the blocking of electromagnetic radiation so that the radiation essentially cannot pass conductors such as met- als and carbons mainly shield by reflection of the radiation. On the other hand

  15. On properties of the special coordinate basis of linear systems BEN M. CHEN

    E-Print Network [OSTI]

    Benmei, Chen

    or technique devel- oped by Sannuti and Saberi in 1987 has a distinct feature of explicitly displaying of the seminal work of Sannuti and Saberi. It makes the theory of the special coordinate basis more complete. 1 work of Sannuti and Saberi (1987). Such a special coordinate basis decomposition or technique has

  16. Scientific Correspondence Are Natural Deep Eutectic Solvents the Missing Link in

    E-Print Network [OSTI]

    Galis, Frietson

    of sugars, which may serve as storage prod- ucts and a source of energy, the other compounds are present Delft, The Netherlands Over the past decade, metabolomics has devel- oped into a major tool for studying experimental conditions? NMR-based metabolomics in particular give a clear view of the major compounds present

  17. A, Science Service Geatprs Released on receipt

    E-Print Network [OSTI]

    of Heating and Ventilating Ezgineers. I n preparing the chart the observer makes a s e r i e s of tests at and comfort i s t h e Synthetic.Air Chart , which was devel- oped i n the Ventilation Division of the Chicago Health Department and was adopted i n 1920 as a standard measure of ventilation by the American Society

  18. Effect of H2O on the density of silicate melts at high pressures: Static experiments and the application of a

    E-Print Network [OSTI]

    Effect of H2O on the density of silicate melts at high pressures: Static experiments in revised form 1 March 2012; available online 13 March 2012 Abstract Density of ultramafic silicate melts­Murnaghan equation of state and a newly devel- oped equation of state for silicate melts based on the model of hard

  19. Robots you'll see today Collaborative, cooperative, networked robotics

    E-Print Network [OSTI]

    Shapiro, Benjamin

    Facility on campus. Unmanned vehicles A wide variety of unmanned vehicle platforms are being devel- oped, including micro air vehicles, ground vehicles, sea surface ve- hicles, underwater vehicles, and planetary that perform reliably over unreliable communication networks. Our researchers use air, ground, and underwater

  20. The Uintah Parallelism Infrastructure: A Performance Evaluation on the SGI Origin 2000

    E-Print Network [OSTI]

    Utah, University of

    between hydrocarbon fires, struc­ tures and high­energy materials (explosives and propellants complex real world phenomena. These simulations necessitate the use of ever increasing com­ putational devel­ oped specifically to study interactions between hydro­ carbon fire, structures, and high­energy

  1. The Uintah Parallelism Infrastructure: A Performance Evaluation on the SGI Origin 2000

    E-Print Network [OSTI]

    Utah, University of

    between hydrocarbon fires, struc- tures and high-energy materials (explosives and propellants complex real world phenomena. These simulations necessitate the use of ever increasing com- putational devel- oped specifically to study interactions between hydro- carbon fire, structures, and high-energy

  2. The physical status of Miller clay after nine years of crop rotations

    E-Print Network [OSTI]

    Hipp, Billy Wayne

    1963-01-01T23:59:59.000Z

    by crops and management was made by Uhland (24). A report from his work shows 1) plants with deep and well devel- oped root systems such as alfalfa and kudzu may be expected to increase porosity and permeability and to improve soil structure, 2) crop...

  3. December 2006 Factors Affecting U.S. Production

    E-Print Network [OSTI]

    and estimate the returns to the taxpayer. To evaluate whether the program is meeting its stated objectives, EAO. · Benefit-cost analysis studies, which identify and quantify the private, public, and social returns companies have devel- oped the manufacturing expertise and made the requisite capital investment to profit

  4. "Sex in Marriage is a Divine Gift": For whom ? Evidence from the Manila contraceptive ban

    E-Print Network [OSTI]

    Boyer, Edmond

    that family resources are important constraints in the accumulation of child human capital. This idea lies inputs of the child human capital accumulation process. Hence, a ma- jor challenge for estimating and quality in devel- oping countries by estimating the effect of family size on child education in urban

  5. Director's Report Unidata Users Committee Meeting

    E-Print Network [OSTI]

    · A Software Engineer to work on the NOAA-funded OPeNDAP- Unidata (OPULS) collaborative project. · A System "individuals whose energy, expertise, and active involvement enable the Unidata Program to better serve 500 machines at ~230 sites are running LDM-6 and reporting real time statistics. These numbers have

  6. Institute for Micro System Prof. Dr.-Ing. habil Jrg Mller

    E-Print Network [OSTI]

    Moeller, Ralf

    solar cell, potentially high efficient and low cost, is devel- oped, which is based on a rapid melting on crystalline thick film silicon solar cells on glass substrates and polymer fuel cells Micro Total Analysis silicon Recrystallized Thick Film Sili- con Solar Cells on Glass A new type of polycrystalline silicon

  7. BUSINESS ANALYST: A BRIDGE Information Technology

    E-Print Network [OSTI]

    Kundu, Sukhamay

    . · Interfaces with IT-development throughout the software develop- ment life-cycle (SDLC) to make sure the right product is devel- oped and all requirements are met. · Manages changes in requirements during SDLC. #12 the requirements BA-process spans the whole SDLC. #12;

  8. Presented at the IS&T/SID Fifth Color Imaging Conference, November 1997 Inverse Lighting for Photography

    E-Print Network [OSTI]

    Marschner, Steve

    Presented at the IS&T/SID Fifth Color Imaging Conference, November 1997 Inverse Lighting, New York Abstract We introduce a technique for improving photographs using inverse lighting, a new process based on algorithms devel­ oped in computer graphics for computing the reflection of light in 3D

  9. Newsletter of the Friends of Hatfield Marine Science Center www.hmsc.oregonstate.edu/friends UpwellingUpwellingNewsletter of the Friends of Hatfield Marine Science Center

    E-Print Network [OSTI]

    p. 7 · Upcoming seminars / events p. 8 The R/V Pacific Storm tows the wave energy buoy devel- oped in a collaboration between OSU, Columbia Power Technologies and the US Navy out to a test site off the coast of Newport. The buoy performed well during its September deployment, with hydrodynamic behavior conforming

  10. Characterization of hydrous ruthenium oxide/carbon nanocomposite supercapacitors prepared by a colloidal method

    E-Print Network [OSTI]

    Popov, Branko N.

    , the recent research has focused on devel- oping structures of RuO2/carbon composite materials. Miller 20 July 2001 Abstract Amorphous nanostructured composite materials with different RuO2 loadings converted to ruthenium oxide after annealing at 100 8C. The speci®c capacitance of RuO2/carbon composite

  11. Mid-Course Review: NetCDF in the Current

    E-Print Network [OSTI]

    architecture Improved performance Generic tools NetCDF-4 adoption Standards endorsements Gridspec APICDF/libcf, netCDF-Java, CDM, TDS, NcML, CF conventions Adopt, develop, and promote open standards, conventions for observational data Improve compatibility between netCDF APIs and OPeNDAP protocols Improve netCDF performance

  12. scientists, environmental scientists and others to participate in discussions about risk analysis

    E-Print Network [OSTI]

    Bongard, Josh

    and devel- oping countries, Caruso focuses on the dark side of genetically modified crops. Her book echoes and the Potential/ Seeds for the Future: The Impact of Genetically Modified Crops on the Environment by Jennifer A many of the themes from Deborah Koons Garcia's The Future of Food, a docu- mentary film that attacks

  13. PHYSICAL REVIEW A VOLUME 39, NUMBER 2 JANUARY 15, 1989 Oscillatory modes in the flow between two horizontal corotating cylinders

    E-Print Network [OSTI]

    Wesfreid, José Eduardo

    in a boundary layer on a concave wall, it takes the name of a Taylor-Gortler in- stability. This instability predicted, from experimental re- sults, that, even in this problem, a boundary layer devel- opingPHYSICAL REVIEW A VOLUME 39, NUMBER 2 JANUARY 15, 1989 Oscillatory modes in the flow between two

  14. High-Temperature Mechanical Behavior and Hot Rolling S.F. HARNISH, H.A. PADILLA, B.E. GORE, J.A. DANTZIG, A.J. BEAUDOIN,

    E-Print Network [OSTI]

    Dantzig, Jonathan A.

    and processing performance of 705X aluminum alloys is exam- ined, employing a combination of mechanical testing aluminum has been one of the most widely successful and broadly applicable materials devel- oped of these alloys include packaging, automotive, and aerospace. The Al-Zn- Mg-Cu 7000 series alloys have seen

  15. Mechanical Properties of Controlled Memory and Superelastic Nickel-Titanium Wires Used in the Manufacture

    E-Print Network [OSTI]

    Zheng, Yufeng

    Mechanical Properties of Controlled Memory and Superelastic Nickel-Titanium Wires Used was to investigate the structure and mechanical properties of newly devel- oped controlled memory (CM) nickel-titanium transformation behavior of both types of wires were examined by x-ray energy dispersive spectroscopy

  16. Energy-aware simulation with DVFS Tom Guerouta,b,c

    E-Print Network [OSTI]

    Calheiros, Rodrigo N.

    Energy-aware simulation with DVFS Tom Gu´erouta,b,c , Thierry Monteila,c , Georges Da Costab are specifically devel- oped for modelling networks and only a few of them simulate energy-efficiency algorithms. This article describes which tools need to be implemented in a simulator in order to compute energy

  17. Axiomatic quantum field theory in curved spacetime

    E-Print Network [OSTI]

    S. Hollands; R. M. Wald

    2008-03-13T23:59:59.000Z

    The usual formulations of quantum field theory in Minkowski spacetime make crucial use of features--such as Poincare invariance and the existence of a preferred vacuum state--that are very special to Minkowski spacetime. In order to generalize the formulation of quantum field theory to arbitrary globally hyperbolic curved spacetimes, it is essential that the theory be formulated in an entirely local and covariant manner, without assuming the presence of a preferred state. We propose a new framework for quantum field theory, in which the existence of an Operator Product Expansion (OPE) is elevated to a fundamental status, and, in essence, all of the properties of the quantum field theory are determined by its OPE. We provide general axioms for the OPE coefficients of a quantum field theory. These include a local and covariance assumption (implying that the quantum field theory is locally and covariantly constructed from the spacetime metric), a microlocal spectrum condition, an "associativity" condition, and the requirement that the coefficient of the identity in the OPE of the product of a field with its adjoint have positive scaling degree. We prove curved spacetime versions of the spin-statistics theorem and the PCT theorem. Some potentially significant further implications of our new viewpoint on quantum field theory are discussed.

  18. Quantum field theory in curved spacetime, the operator product expansion, and dark energy

    E-Print Network [OSTI]

    S. Hollands; R. M. Wald

    2008-05-22T23:59:59.000Z

    To make sense of quantum field theory in an arbitrary (globally hyperbolic) curved spacetime, the theory must be formulated in a local and covariant manner in terms of locally measureable field observables. Since a generic curved spacetime does not possess symmetries or a unique notion of a vacuum state, the theory also must be formulated in a manner that does not require symmetries or a preferred notion of a ``vacuum state'' and ``particles''. We propose such a formulation of quantum field theory, wherein the operator product expansion (OPE) of the quantum fields is elevated to a fundamental status, and the quantum field theory is viewed as being defined by its OPE. Since the OPE coefficients may be better behaved than any quantities having to do with states, we suggest that it may be possible to perturbatively construct the OPE coefficients--and, thus, the quantum field theory. By contrast, ground/vacuum states--in spacetimes, such as Minkowski spacetime, where they may be defined--cannot vary analytically with the parameters of the theory. We argue that this implies that composite fields may acquire nonvanishing vacuum state expectation values due to nonperturbative effects. We speculate that this could account for the existence of a nonvanishing vacuum expectation value of the stress-energy tensor of a quantum field occurring at a scale much smaller than the natural scales of the theory.

  19. Asymptotic distribution of inequalityrestricted canonical correlation with application to tests for

    E-Print Network [OSTI]

    Kuriki, Satoshi

    Asymptotic distribution of inequality­restricted canonical correlation with application to tests Running Head: Inequality­restricted canonical correlation Address for correspondence: Satoshi Kuriki­way ordered contingency tables based on these models are devel­ oped in a general framework of inequality­restricted

  20. Asymptotic distribution of inequality-restricted canonical correlation with application to tests for

    E-Print Network [OSTI]

    Kuriki, Satoshi

    Asymptotic distribution of inequality-restricted canonical correlation with application to tests Running Head: Inequality-restricted canonical correlation Address for correspondence: Satoshi Kuriki-way ordered contingency tables based on these models are devel- oped in a general framework of inequality-restricted

  1. Bulletin of the Seismological Society of America, Vol. 94, No. 5, pp. 18171830, October 2004 Faulting Induced by Forced Fluid Injection and Fluid Flow Forced by

    E-Print Network [OSTI]

    is a technique used to image the volume of rock stimulated by hydraulic fracturing (Al- bright and Pearson, 1982. The method has been applied in devel- oping hot dry rock reservoirs (e.g., Pine and Batchelor, 1984; House al., 2003). Beyond mapping gross structure and fluid-flow paths, rela- tive source location

  2. Finite element study of multi-modal vibration damping for thermal barrier coating applications

    E-Print Network [OSTI]

    barriers for gas turbine blades, there is a growing interest in devel- oping multifunctional coatings methods is critical in many tech- nologies and especially so for gas turbine engines since many the spinning up of the turbine to avoid resonances. One of the advances made in gas turbine technologies, has

  3. Transfer Across the Air-Sea Interface Christoph S. Garbe, Anna Rutgersson, Jacqueline Boutin,

    E-Print Network [OSTI]

    Garbe, Christoph S.

    ): k Ľ F C0 Ŕ Cbulk : (2.1) For the transport of CO2, the water-sided transfer velocity kw is often related to the partial pressure difference pCO2 bet, several models have been devel- oped, ranging from conceptual models to numerical models. Most frequently

  4. Proceedings of the IEEE International Conference on Robotics and Automation, April 21-27 1997, Albuquerque, NM. The Dynamics of an Articulated Forestry Machine and its Applications

    E-Print Network [OSTI]

    Papadopoulos, Evangelos

    of complexity are devel- oped to help in designing an effective coordinated controller in Cartesian spaceProceedings of the IEEE International Conference on Robotics and Automation, April 21-27 1997 base degrees-of-freedom due to the machine's compliant tires. Techniques and experiments designed

  5. NEWS & VIEWS 590 nature physics | VOL 4 | AUGUST 2008 | www.nature.com/naturephysics

    E-Print Network [OSTI]

    Loss, Daniel

    de Janeiro, Rio de Janeiro, 21941-972 Brazil. e-mail: bk@if.ufrj.br D oping is a crucial process photon is absorbed, promoting the qubit to its higher-energy state, where the qubit again pushes the circuit current. The qubit energy eventually decays to its lower-energy state emitting a low-energy photon

  6. JSS Journal of Statistical Software MMMMMM YYYY, Volume VV, Issue II. http://www.jstatsoft.org/

    E-Print Network [OSTI]

    Dahl, David B.

    . The jvmr package also provides the reverse functionality for embedding JVM languages in R using, is statistically typed, and is often more concise and expressive than equivalent Java code. R is a scripting language and environment devel- oped by statisticians for statistical computing and graphics with a large

  7. Published: 25 April 2011 Fund Egypt's Future to Save the Arab Uprising

    E-Print Network [OSTI]

    Zewail, Ahmed

    1 Published: 25 April 2011 Fund Egypt's Future to Save the Arab Uprising Op-Ed by Ahmed H. Zewail. The Egyptians brought down the head of the system, but not the system itself. That is the challenge now. Egypt between them, Egypt is united. In contrast, the second model for revolutions is that of Yemen, Libya

  8. Published: 3 November 2014 Don't Cut Aid to Egypt: The Hopeful Case for

    E-Print Network [OSTI]

    Zewail, Ahmed

    1 Published: 3 November 2014 Don't Cut Aid to Egypt: The Hopeful Case for Supporting Egyptian President Sisi Today, the U.S. needs Egypt's partnership more than ever. Op-Ed by Ahmed H. Zewail Some support him. And I believe that cutting foreign aid to Egypt at this point would harm the U.S.-Egypt

  9. Published: 3 January 2013 Egypt's New Year

    E-Print Network [OSTI]

    Zewail, Ahmed

    1 Published: 3 January 2013 Egypt's New Year Resolution Op-Ed by Ahmed H. Zewail CAIRO -- Egypt, is one of Egypt's largest extremist organizations. "Only when he changes his mind from being a Gamaa Brother to a national leader can we have real progress in Egypt," Mostafa said, adding: "For now

  10. Published: 20 May 2012 Egypt's March Toward Democracy

    E-Print Network [OSTI]

    Zewail, Ahmed

    1 Published: 20 May 2012 Egypt's March Toward Democracy Op-Ed by Ahmed H. Zewail CAIRO -- A few candidates among the 13 running for president of Egypt. This stunning debate went on for more than four hours and was watched by millions of Egyptians and other Arabs. Contrary to the perception around the world that Egypt

  11. Published: 14 October 2013 The Revolution Egypt Needs

    E-Print Network [OSTI]

    Zewail, Ahmed

    1 Published: 14 October 2013 The Revolution Egypt Needs Op-Ed by Ahmed H. Zewail Pasadena, California -- When I was a boy in Desuq, Egypt, a city on the Rosetta branch of the Nile, about 50 miles east was in the fabric of our culture and religion. I left Egypt in 1969 for graduate school at the University

  12. Published: 23 June 2011 Another Revolution Afoot in Egypt

    E-Print Network [OSTI]

    Zewail, Ahmed

    1 Published: 23 June 2011 Another Revolution Afoot in Egypt: Top-Notch Science Egypt has launched way to cure fanaticism. Op-Ed by Ahmed H. Zewail Cairo -- Nearly 100 days after the revolution, Egypt say hawa gadid -- a new air. The big question is how to channel this energy to forge a new Egypt

  13. Published: 21 May 2012 Egypt's March Toward Democracy

    E-Print Network [OSTI]

    Zewail, Ahmed

    1 Published: 21 May 2012 Egypt's March Toward Democracy Op-Ed by Ahmed H. Zewail CAIRO -- A few candidates among the 13 running for president of Egypt. This stunning debate went on for more than four hours and was watched by millions of Egyptians and other Arabs. Contrary to the perception around the world that Egypt

  14. Published: 6 October 2011 As Elections Loom, Egypt Must Unify

    E-Print Network [OSTI]

    Zewail, Ahmed

    1 Published: 6 October 2011 As Elections Loom, Egypt Must Unify Op-Ed by Ahmed H. Zewail "Where is Egypt going?" a driver named Mohamed asked me recently. It is the question on everyone's mind and the building of the new City of Science and Technology. At last, it was felt, Egypt would be rejoining

  15. METHODOLOGY ARTICLE Open Access Gene prioritization and clustering by multi-view

    E-Print Network [OSTI]

    for Biotechnology Informa- tion (NCBI) at the National Library of Medicine (NLM). MEDLINE covers all aspects resource for biomedical text mining applications is the MEDLINE database devel- oped by the National Center of controlled vocabularies and the representation schemes of terms occupy a cen- tral role in text mining

  16. Microbial Energizers: Fuel Cells That Keep on Going

    E-Print Network [OSTI]

    Lovley, Derek

    - cessing food wastes. · Optimizing microbial fuel cells will entail devel- oping a better understandingMicrobial Energizers: Fuel Cells That Keep on Going Microbes that produce electricity by oxidizing to eliminate the inefficien- cies of combustion are behind the recent interest in hydrogen fuel cells, which

  17. Terahertz emission from black silicon M. Theuer,2

    E-Print Network [OSTI]

    of different meth- ods for the generation of terahertz radiation have been devel- oped including pure optical-called photoconductive terahertz emitters and detectors, radiation-damaged silicon on sapphire or low- temperature grown of terahertz optics made out of silicon is that the copropagating infrared radiation is ab- sorbed sufficiently

  18. ccsd-00003302,version1-16Nov2004 The L-R Correlator and its Chiral Condensates in the MHA and

    E-Print Network [OSTI]

    Boyer, Edmond

    ccsd-00003302,version1-16Nov2004 The L-R Correlator and its Chiral Condensates in the MHA and MHA, called MHA and MHA+V'. Results concerning the evaluation of chiral condensates of dimension six and eight the lowest dimension operator product ex- pansion (OPE) condensates of this function in Talk given at the 11

  19. Model-Based Control and Optimization of Large Scale Physical Systems -Challenges in Reservoir Engineering

    E-Print Network [OSTI]

    Van den Hof, Paul

    needs to increase efficiency in oil recovery from subsurface reservoirs new technology is devel- oped challenge to rationalize the decision processes. With newly developed technology for drilling wells and in for Systems and Control, Delft University of Technology, Mekelweg 2, 2628 CD Delft, The Netherlands E-mail: p

  20. reason is cost. High-TC wires in use today are 70% silver by volume. Even if a silver-free

    E-Print Network [OSTI]

    Perrimon, Norbert

    in both the superconductor and surrounding metallic casing. By devel- oping lower-temperature but cost-tested powder-in-a-tube technique which was developed for low-temperature superconductors, such as Nb applied superconductivity. Still, we will have to await a few more sequels to this new work2­4 before we

  1. The Theory of Island Biogeography

    E-Print Network [OSTI]

    Landweber, Laura

    The Theory of Island Biogeography Robert H. MacArthur and Edward O. Wilson The young biologists" dominated by the collection of data. In The Theory of Island Biogeography they set out to change that by devel- oping a general mathema- tical theory that would make sense of a key ecological problem

  2. mPuff: Automated Detection of Cigarette Smoking Puffs from Respiration Measurements

    E-Print Network [OSTI]

    Kumar, Santosh

    that accounts for one in five deaths in the United States. Extensive research is conducted on devel- oping deaths in the United States [24]. Smokers die 13-14 years younger and cost $193 billion annually [1 effective smoking cessation programs. Most smoking cessation programs achieve low success rate because

  3. Evaluation of a Pumping Assist Lung That Uses a Rotating Fiber Bundle

    E-Print Network [OSTI]

    Federspiel, William J.

    Evaluation of a Pumping Assist Lung That Uses a Rotating Fiber Bundle ROBERT G. SVITEK,* BRIAN J. FRANKOWSKI,* AND WILLIAM J. FEDERSPIEL,*§ A paracorporeal respiratory assist lung (PRAL) is being devel- oped for supplemental gas exchange to allow the native lungs of acute lung failure patients to heal. The device consists

  4. Permanent Magnets Synchronous Machines Faults Detection and Identification

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    for permanent magnet synchronous machines (PMSM). Two main faults occurring on these machines are identified of the PMSM is devel- oped and simulated using Matlab Simulink. The model enables simulating nominal and faulty PMSM behavior, with several stages of degradation, and is supported by tests results. Specific

  5. CIRQ: Qualitative fluid flow modelling for aerospace FMEA applications Neal Snooke

    E-Print Network [OSTI]

    Snooke, Neal

    M2 CIRQ: Qualitative fluid flow modelling for aerospace FMEA applications Neal Snooke Department- oped on top of the MCIRQ simulator with the aim to produce an automated FMEA for aircraft fuel systems similar to pre- viously developed automated electrical FMEA. Introduction This paper describes a circuit

  6. Tool Support for Incremental Failure Mode and Effects Analysis of Component-Based Systems

    E-Print Network [OSTI]

    ¨oping, Sweden {jonel, simin}@ida.liu.se Abstract Failure Mode and Effects Analysis (FMEA) is a well- known technique widely used for safety assessment in the area of safety-critical systems. However, FMEA is tradi systems. Also, small modifications in the design may result in a complete revision of the initial FMEA

  7. Amer J of Potato Res (2001) 78:421424 421 Michigan Purple

    E-Print Network [OSTI]

    Douches, David S.

    2001-01-01T23:59:59.000Z

    Amer J of Potato Res (2001) 78:421424 421 Michigan Purple: A Purple-Skinned Tablestock Variety D. S-ovoid shaped, purple- skinnedtablestock potato variety (Solanum tuberosum L.) devel- oped at Michigan State Purple from field trial at Montcalm Potato Research Farm. Accepted for publicationAugust2, 2001

  8. Toward Scalable Routing Experiments with Real-Time Network Simulation Yue Li, Jason Liu, and Raju Rangaswami

    E-Print Network [OSTI]

    Liu, Xiaowen "Jason"

    and evaluating network routing protocols can be categorized as analytical, simulation-based, and emulation-basedToward Scalable Routing Experiments with Real-Time Network Simulation Yue Li, Jason Liu, and Raju with a previously devel- oped real-time network simulation engine. Our design of the infrastructure uses a novel

  9. Higher Spin Currents in Wolf Space: Part III

    E-Print Network [OSTI]

    Changhyun Ahn

    2015-04-01T23:59:59.000Z

    The large N=4 linear superconformal algebra (generated by four spin-1/2 currents, seven spin-1 currents, four spin-3/2 currents and one spin-2 current) found by Sevrin, Troost and Van Proeyen (and other groups) was realized in the N=4 superconformal coset SU(5)/SU(3) theory previously. The lowest 16 higher spin currents of spins (1, 3/2, 3/2, 2), (3/2, 2, 2, 5/2), (3/2, 2, 2, 5/2) and (2, 5/2, 5/2, 3) are obtained by starting with the operator product expansions (OPEs) between the four spin-3/2 currents from the above large N=4 linear superconformal algebra and the lowest higher spin-1 current which is the same as the one in the Wolf space coset SU(5)/[SU(3) x SU(2) x U(1)] theory. These OPEs determine the four higher spin-3/2 currents and the next six higher spin-2 currents are obtained from the OPEs between the above four spin-3/2 currents associated with the N=4 supersymmetry and these four higher spin-3/2 currents. The four higher spin-5/2 currents can be determined by calculating the OPEs between the above four spin-3/2 currents and the higher spin-2 currents. Similarly, the higher spin-3 current is obtained from the OPEs between the four spin-3/2 currents and the higher spin-5/2 currents. The explicit relations between the above 16 higher spin currents and the corresponding 16 higher spin currents which were found in the extension of large N=4 nonlinear superconformal algebra previously are given. By examining the OPEs between the 16 currents from the large N=4 linear superconformal algebra and the 16 higher spin currents, the match with the findings of Beccaria, Candu and Gaberdiel is also given. The next 16 higher spin currents of spins (2, 5/2, 5/2, 3), (5/2, 3, 3, 7/2), (5/2, 3, 3, 7/2) and (3, 7/2, 7/2, 4) occur from the OPEs between the above lowest 16 higher spin currents.

  10. Locally-smeared operator product expansions

    SciTech Connect (OSTI)

    Monahan, Christopher; Orginos, Kostantinos

    2014-12-01T23:59:59.000Z

    We propose a "locally-smeared Operator Product Expansion" (sOPE) to decompose non-local operators in terms of a basis of locally-smeared operators. The sOPE formally connects nonperturbative matrix elements of smeared degrees of freedom, determined numerically using the gradient flow, to non-local operators in the continuum. The nonperturbative matrix elements do not suffer from power-divergent mixing on the lattice, provided the smearing scale is kept fixed in the continuum limit. The presence of this smearing scale prevents a simple connection to the standard operator product expansion and therefore requires the construction of a two-scale formalism. We demonstrate the feasibility of our approach using the example of real scalar field theory.

  11. Intern experience with the Environmental Laboratory of the U.S. Army Engineer Waterways Experiment Station: an internship report

    E-Print Network [OSTI]

    Truitt, Clifford Lee, 1948-

    2013-03-13T23:59:59.000Z

    at no cost to the District. Typical DOTS requests include technically reviewing proposed project designs, compiling and providing references on a technical topic, devel? oping scopes of work for District contracts, reviewing test data and acting... the author managed and executed a complete, comprehensive engineering pro? ject examining the feasibility of an innovative dredged material dis? posal technique. The Indiana Harbor project provided an opportunity to function as a member of a large inter...

  12. New Derivation of Off-Shell Representations of the Multi-dimensional Affine and Virasoro Algebras

    E-Print Network [OSTI]

    T. A. Larsson

    2015-01-19T23:59:59.000Z

    Algebras of currents and diffeomorphisms in arbitrary dimension have extensions which generalize the affine and Virasoro algebras on the circle. A large class of off-shell representations was discovered in Comm. Math. Phys. 214 (2000) 469--491. That paper is not so accessible due to a slightly non-standard normal ordering formalism and cumbersome $p$-jet calculations. The purpose of the present paper is to simplify the derivation using standard OPE methods and a more field-like formalism.

  13. Fear of Floating and Social Welfare

    E-Print Network [OSTI]

    Tambakis, Demosthenes N

    tendency by policymakers in developing countries to use inflation surprises to improve the government’s fiscal position. We are motivated by two stylized empirical observations. First, devel- oping country policymakers typically pursue macroeconomic... . Although initially restricted to the financial sector, a devaluation’s aftershocks spread to other sectors and result in widespread corporate failure and unemployment. Second, although many developing countries responded to the financial crises by adopting...

  14. Brush Busters: How to Manage Macartney Rose

    E-Print Network [OSTI]

    Hanselka, C. Wayne

    2004-12-22T23:59:59.000Z

    this Brush Busters method, you?ll be able to kill more than 7 of 10 plants you treat. Your results may vary with weather and other conditions. This method for Macartney rose control was devel- oped and approved by professionals with the Texas Agricultural... Experiment Station and Texas Cooperative Extension, both agencies of The Texas A&M University System. Brush Busters Leaf Spray Method Works Best: On individual disturbed or undisturbed Macartney rose clumps: ? Undisturbed ? Undisturbed plants that are 5 feet...

  15. Exact Correlators of BPS Operators from the 3d Superconformal Bootstrap

    E-Print Network [OSTI]

    Shai M. Chester; Jaehoon Lee; Silviu S. Pufu; Ran Yacoby

    2014-12-29T23:59:59.000Z

    We use the superconformal bootstrap to derive exact relations between OPE coefficients in three-dimensional superconformal field theories with ${\\cal N} \\geq 4$ supersymmetry. These relations follow from a consistent truncation of the crossing symmetry equations that is associated with the cohomology of a certain supercharge. In ${\\cal N} = 4$ SCFTs, the non-trivial cohomology classes are in one-to-one correspondence with certain half-BPS operators, provided that these operators are restricted to lie on a line. The relations we find are powerful enough to allow us to determine an infinite number of OPE coefficients in the interacting SCFT ($U(2)_2 \\times U(1)_{-2}$ ABJ theory) that constitutes the IR limit of $O(3)$ ${\\cal N} = 8$ super-Yang-Mills theory. More generally, in ${\\cal N} = 8$ SCFTs with a unique stress tensor, we are led to conjecture that many superconformal multiplets allowed by group theory must actually be absent from the spectrum, and we test this conjecture in known ${\\cal N} = 8$ SCFTs using the superconformal index. For generic ${\\cal N} = 8$ SCFTs, we also improve on numerical bootstrap bounds on OPE coefficients of short and semi-short multiplets and discuss their relation to the exact relations between OPE coefficients we derived. In particular, we show that the kink previously observed in these bounds arises from the disappearance of a certain quarter-BPS multiplet, and that the location of the kink is likely tied to the existence of the $U(2)_2 \\times U(1)_{-2}$ ABJ theory, which can be argued to not possess this multiplet.

  16. Energy Efficient Refinery Process Developed with U.S. D.O.E. Support

    E-Print Network [OSTI]

    Mings, W. J.

    1983-01-01T23:59:59.000Z

    ENERGY EFFICIENT REFINERY PROCESS DEVELOPED WITH U.S. D.O.E. SUPPORT Walter J. Mings, P.E. EG&G Idaho, Inc. Idaho Falls, Idaho Abstract The United States Department of Energy histori cally has encouraged private efforts to develop en ergy... with potential for extensive industrial energy savings. INTRODUCTION An innovative energy saving refinery process (also called the catalytic distillation process) for pro ducing MTBE (Methyl Tertiary Butyl Ether) was devel oped by two Houston companies...

  17. Twist Field as Three String Interaction Vertex in Light Cone String Field Theory

    E-Print Network [OSTI]

    Isao Kishimoto; Sanefumi Moriyama; Shunsuke Teraguchi

    2007-03-22T23:59:59.000Z

    It has been suggested that matrix string theory and light-cone string field theory are closely related. In this paper, we investigate the relation between the twist field, which represents string interactions in matrix string theory, and the three-string interaction vertex in light-cone string field theory carefully. We find that the three-string interaction vertex can reproduce some of the most important OPEs satisfied by the twist field.

  18. ~~"jr..TT-."';\\"fli" ~n~/ 2/3/67

    E-Print Network [OSTI]

    Rathbun, Julie A.

    that the solar cell load resistor Rs was changed from 1· 37.fL to l· O.f'Lto minimi ze .the effect of temperature on the output of the solar cell (ke e ping it ope rating above the "knee ' in the constant cur- rent region up, but in the worst region, it is considered large enough to r e quire individual calibration curves for each

  19. 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim400 wileyonlinelibrary.com www.MaterialsViews.com

    E-Print Network [OSTI]

    Gong, Xingao

    , and light- to-electricity conversion in solar cells is one of the best-devel- oped renewable energy.MaterialsViews.com www.advenergymat.de PROGRESSREPORT Adv. Energy Mater. 2012, 2, 400­409 DOI: 10.1002/aenm.201100630 A Claverton Down, Bath BA2 7AY, UK E-mail: a.walsh@bath.ac.uk S. Chen, X.-G. Gong Key Laboratory

  20. Functional-analysis based tool for testing quark-hadron duality

    E-Print Network [OSTI]

    Irinel Caprini; Maarten Golterman; Santiago Peris

    2014-07-09T23:59:59.000Z

    Quark-hadron duality is a key concept in QCD, allowing for the description of physical hadronic observables in terms of quark-gluon degrees of freedom. The modern theoretical framework for its implementation is Wilson's operator product expansion (OPE), supplemented by analytic extrapolation from large Euclidean momenta, where the OPE is defined, to the Minkowski axis, where observable quantities are defined. Recently, the importance of additional terms in the expansion of QCD correlators near the Minkowski axis, responsible for quark-hadron duality violations (DVs), was emphasized. In this paper we introduce a mathematical tool that might be useful for the study of DVs in QCD. It is based on finding the minimal distance, measured in the $L^\\infty$ norm along a contour in the complex momentum plane, between a class of admissible functions containing the physical amplitude and the asymptotic expansion predicted by the OPE. This minimal distance is given by the norm of a Hankel matrix that can be calculated exactly, using as input the experimental spectral function on a finite interval of the timelike axis. We also comment on the relation between the new functional tool and the more commonly used $\\chi^2$-based analysis. The approach is illustrated on a toy model for the QCD polarization function recently proposed in the literature.

  1. Pruning and Training Peach Orchards

    E-Print Network [OSTI]

    Price, R. H.

    1901-01-01T23:59:59.000Z

    is directing the growth of succeeding branches. The idea of correct train- ing should come befo~e successful pruning. we prune in olrder to train a tree according to some preconceived ideal of form. We also prune, , less frequently, to remove dead wood...- wards. No one should prune a peach tree without fully understanding the necessity of the operation and also what results such an ope~ation of surgery would have upon the future growth of the tree. The best form of top for a given locality...

  2. The conduct of United States foreign policy during the Suez crisis of 1956

    E-Print Network [OSTI]

    McKnight, Michael Edward

    1992-01-01T23:59:59.000Z

    that because the United States was not as dependent on middle Eastern ozl as Eur ope, the Eisen? hower administcation Ci d not interp, et this cr isis in light of America's economic well-bezng. Rather, the main concern centered on the escalation... to the Arabs and not seek to mazntaln itsel f by its own ores and for e: gn backing. Un le s the Isc aelis realize thzs, they were doomed. By this time, Eisec, hower's bold diplomatic initza ive, code- named Gamma, was in progress. 4t the heart of this new...

  3. Self-Dual Supergravity from N = 2 Strings

    SciTech Connect (OSTI)

    de Boer, J.; Skenderis, K.

    1997-09-24T23:59:59.000Z

    A new heterotic N = 2 string with manifest target space supersymmetry is constructed by combining a conventional N = 2 string in the right-moving sector and a Green-Schwarz-Berkovits type string in the left-moving sector. The corresponding sigma model is then obtained by turning on background fields for the massless excitations. We compute the beta functions and we partially check the OPE's of the superconformal algebra perturbatively in {alpha}{prime}, all in superspace. The resulting field equations describe N = 1 self-dual supergravity.

  4. Design data and economic relationships for beef cattle feed handling and processing systems

    E-Print Network [OSTI]

    Allen, William Samuel

    1964-01-01T23:59:59.000Z

    -truck Vertical auger Elevator with p I t' ed) x 34') EQUI PIIEI'IT; Automatic mill mixe~ (instal'ed) Large Unit': $ . 34 18. 00 23. 00 1. 65 1800. 00 1100. 00 3000. 00 1200 00 5600. 00 9600. 00 1200. 00 5000. 00 5 t I 8. . 2t. . . . 6...:. " 38" 55LC 80. )CCC. C- Augers with no 4 inch 6 inch Power Shovel tors, each 125. 00 300. 00 1800. 00 TR 130 '"Large Unit - 2500 Head Ope-arion &yvrSma11 Uni t - 500 Head Operat ion "RB f: V LRBOR. rEED O' RND EQ, ?ENE ttFQu &E&EN"5...

  5. JuliBootS: a hands-on guide to the conformal bootstrap

    E-Print Network [OSTI]

    Paulos, Miguel F

    2014-01-01T23:59:59.000Z

    We introduce {\\tt JuliBootS}, a package for numerical conformal bootstrap computations coded in {\\tt Julia}. The centre-piece of {\\tt JuliBootS} is an implementation of Dantzig's simplex method capable of handling arbitrary precision linear programming problems with continuous search spaces. Current supported features include conformal dimension bounds, OPE bounds, and bootstrap with or without global symmetries. The code is trivially parallelizable on one or multiple machines. We exemplify usage extensively with several real-world applications. In passing we give a pedagogical introduction to the numerical bootstrap methods.

  6. Bootstrapping the Three-Dimensional Supersymmetric Ising Model

    E-Print Network [OSTI]

    Bobev, Nikolay; Mazac, Dalimil; Paulos, Miguel F

    2015-01-01T23:59:59.000Z

    We implement the conformal bootstrap program for three-dimensional CFTs with $\\mathcal{N}=2$ supersymmetry and find universal constraints on the spectrum of operator dimensions in these theories. By studying the bounds on the dimension of the first scalar appearing in the OPE of a chiral and an anti-chiral primary, we find a kink at the expected location of the critical three-dimensional $\\mathcal{N}=2$ Wess-Zumino model, which can be thought of as a supersymmetric analog of the critical Ising model. Focusing on this kink, we determine, to high accuracy, the low-lying spectrum of operator dimensions of the theory.

  7. Pion mass effects on axion emission from neutron stars through NN bremsstrahlung processes

    E-Print Network [OSTI]

    S. Stoica; B. Pastrav; J. E. Horvath; M. P. Allen

    2009-11-30T23:59:59.000Z

    The rates of axion emission by nucleon-nucleon bremsstrahlung are calculated with the inclusion of the full momentum contribution from a nuclear one pion exchange (OPE) potential. The contributions of the neutron-neutron (nn), proton-proton (pp) and neutron-proton (np) processes in both the nondegenerate and degenerate limits are explicitly given. We find that the finite momentum corrections to the emissivities are quantitatively significant for the non-degenerate regime and temperature-dependent, and should affect the existing axion mass bounds. The trend of these nuclear effects is to diminish the emissivities.

  8. JuliBootS: a hands-on guide to the conformal bootstrap

    E-Print Network [OSTI]

    Miguel F. Paulos

    2014-12-12T23:59:59.000Z

    We introduce {\\tt JuliBootS}, a package for numerical conformal bootstrap computations coded in {\\tt Julia}. The centre-piece of {\\tt JuliBootS} is an implementation of Dantzig's simplex method capable of handling arbitrary precision linear programming problems with continuous search spaces. Current supported features include conformal dimension bounds, OPE bounds, and bootstrap with or without global symmetries. The code is trivially parallelizable on one or multiple machines. We exemplify usage extensively with several real-world applications. In passing we give a pedagogical introduction to the numerical bootstrap methods.

  9. Two concurrent architectures for eigenvalue extraction utilizing the QR algorithm

    E-Print Network [OSTI]

    McDaniel, Guy David

    1983-01-01T23:59:59.000Z

    Daniel, B. S . , Texas ARM University Chairman of Advisory Committee: Dr . Ralph K. Cavi n, I I I A highly concurrent planar processor array is studied and a corresponding linear processor array is devel oped wi th regar d to extracting... matrix is either the identity matrix I, or it is invertible so that a new A matrix can be found: = B-'A It is this less general class of problems that shall be dealt witn i n this thesi s . Hence, ( I) may be rewritten as: Ax = Ax or (AI - A)x = 0 (3...

  10. A review of "Transforming English Rural Society: The Verneys and the Claydons, 1600-1820." by John Broad 

    E-Print Network [OSTI]

    Catherine Patterson

    2005-01-01T23:59:59.000Z

    -making they pursued. While the author does not make an explicit argument for this, the book provides evidence for a devel- oping capitalist (or at least market-oriented) outlook among the landed gen- try. Even if the Verneys were fairly hard-nosed businessmen... the lives of the people. Broad argues that the Verneys? dealings with the people of Claydon reflects the tension between the family?s modernizing economic outlook and a strong sense of paternalism, ?modi- fied and modernised to accommodate the Puritan...

  11. Redesign of an isochoric apparatus for P-V-T studies

    E-Print Network [OSTI]

    Johansen, Jared Jon

    2013-02-22T23:59:59.000Z

    der Waals developed the first EOS of consequence in 1873 based upon the hard sphere model of gases. Commercial software packages such as Aspen and Hysis use equations of state extensively for modeling chemical processes. Cubic equations of state... enr oro IN alw114ree Dwr eto olbcnhdo gasket ked due to seal ng p ess s dus plus swat tor s generated by relf. east ng gasket Ih ckmws of asset eats hangs SvcIN4ss ol lnAd Qarrgo Mawmum d~o meal 4 tanya malenal st ope atsrg tern penrture Mswman...

  12. Methodologies used by Warsaw Pact countries (except USSR) in obtaining US technologies. Student report

    SciTech Connect (OSTI)

    Cheeseman, R.J.

    1987-04-01T23:59:59.000Z

    The Warsaw Pact countries obtain U.S. technologies by legal and illegal means. Methods of collection include espionage, overt collection, acquisition by scientific and educational exchange participants, and illegal trade activities. Examples of methods used by the Warsaw Pact countries (except the USSR) are provided. The US faces barriers to preventing loss of its technologies. Among these are resistance from US business interests, insufficient cooperation between US government agencies and overseas allies, lack of US counterintelligence personnel, and the openess of American society. The study concludes that the Warsaw Pact's countries have narrowed NATO's qualitative lead in weaponry as a result of the Warsaw Pact's acquisition effort.

  13. Information Effects in Valuation of Electricity and Water Service Attributes Using Contingent Valuation

    E-Print Network [OSTI]

    Akcura, Elcin

    and duration of power outages had a highly signi?cant negative impact on WTP. Willingness to pay for water attributes has mostly been analysed in devel- oping countries, mainly in Latin America and Asia. Casey et. al. (2005) use a CVM survey in the Amazon Basin... . In addition, the electricity industry will face the challenge of signi?cantly increasing the share of renewable energy in electricity gener- ation in order to meet the EU and government?s target of generating 20 per cent of energy from renewables by 2020...

  14. A study in photosensitization of cattle in southeast Texas during 1953

    E-Print Network [OSTI]

    Hoffman, Garlyn O

    1954-01-01T23:59:59.000Z

    , . but production was not snout to provide auf icient winter forage ru io& t ra&. geo. In Oct- o'ber 1&)5$ livestock were utili, "ing forcg. th; t, under good manage~ant for ye:". rlong grazing, should not have been used until late minter. Pangs 1 has been stoa... on the ground to lest all minter and ?~ abunda!:ce oi' seedhecds we;e devel- oped. The stocking rate on Pangs 2 was six acre. . per cow until 1/50 w!&en the acreage p=r &. om m" ". . incr a &ed to eight, Allowable grazing acre&. . Ies are not suade...

  15. Secretaries Chu and Clinton Praise Energy Cooperation Across the Americas

    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 onYouTube YouTube Note: Since the.pdfBreakingMay 2015ParentsMiddle School (6-8) Teachers$17.5 Million forin Joint Op-Ed |

  16. Secretaries Chu and Donovan Sign Agreement to Help Working Families

    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 onYouTube YouTube Note: Since the.pdfBreakingMay 2015ParentsMiddle School (6-8) Teachers$17.5 Million forin Joint Op-Ed

  17. Unitarity and the Holographic S-Matrix

    SciTech Connect (OSTI)

    Fitzpatrick, A.Liam; /Stanford U., Phys. Dept.; Kaplan, Jared; /SLAC

    2012-08-28T23:59:59.000Z

    The bulk S-Matrix can be given a non-perturbative definition in terms of the flat space limit of AdS/CFT. We show that the unitarity of the S-Matrix, ie the optical theorem, can be derived by studying the behavior of the OPE and the conformal block decomposition in the flat space limit. When applied to perturbation theory in AdS, this gives a holographic derivation of the cutting rules for Feynman diagrams. To demonstrate these facts we introduce some new techniques for the analysis of conformal field theories. Chief among these is a method for conglomerating local primary operators O{sub 1} and O{sub 2} to extract the contribution of an individual primary O{sub {Delta},{ell}} in their OPE. This provides a method for isolating the contribution of specific conformal blocks which we use to prove an important relation between certain conformal block coefficients and anomalous dimensions. These techniques make essential use of the simplifications that occur when CFT correlators are expressed in terms of a Mellin amplitude.

  18. Bootstrapping $O(N)$ Vector Models in $4

    E-Print Network [OSTI]

    Shai M. Chester; Silviu S. Pufu; Ran Yacoby

    2015-01-06T23:59:59.000Z

    We use the conformal bootstrap to study conformal field theories with $O(N)$ global symmetry in $d=5$ and $d=5.95$ spacetime dimensions that have a scalar operator $\\phi_i$ transforming as an $O(N)$ vector. The crossing symmetry of the four-point function of this $O(N)$ vector operator, along with unitarity assumptions, determine constraints on the scaling dimensions of conformal primary operators in the $\\phi_i \\times \\phi_j$ OPE. Imposing a lower bound on the second smallest scaling dimension of such an $O(N)$-singlet conformal primary, and varying the scaling dimension of the lowest one, we obtain an allowed region that exhibits a kink located very close to the interacting $O(N)$-symmetric CFT conjectured to exist recently by Fei, Giombi, and Klebanov. Under reasonable assumptions on the dimension of the second lowest $O(N)$ singlet in the $\\phi_i \\times \\phi_j$ OPE, we observe that this kink disappears in $d =5$ for small enough $N$, suggesting that in this case an interacting $O(N)$ CFT may cease to exist for $N$ below a certain critical value.

  19. Time-Symmetric Rolling Tachyon Profile

    E-Print Network [OSTI]

    Matheson Longton

    2015-05-04T23:59:59.000Z

    We investigate the tachyon profile of a time-symmetric rolling tachyon solution to open string field theory. We algebraically construct the solution of [arXiv:0707.4472] at 6th order in the marginal parameter, and numerically evaluate the corresponding tachyon profile as well as the action and several correlation functions containing the equation of motion. We find that the marginal operator's singular self-OPE is properly regularized and all quantities we examine are finite. In contrast to the widely studied time-asymmetric case, the solution depends nontrivially on the strength of the deformation parameter. For example, we find that the number and period of oscillations of the tachyon field changes as the strength of the marginal deformation is increased. We use the recent renormalization scheme of [arXiv:1412.3466], which contains two free parameters. At finite deformation parameter the tachyon profile depends on these parameters, while when the deformation parameter is small, the solution becomes insensitive to them and behaves like previously studied time-asymmetric rolling tachyon solutions. We also show that convergence of perturbation series is not as straightforward as in the time-asymmetric case with regular OPE, and find evidence that it may depend on the renormalization constants.

  20. Technical Letter Report: Evaluation and Analysis of a Few International Periodic Safety Review Summary Reports

    SciTech Connect (OSTI)

    Chopra, Omesh K. [Argonne National Lab., IL (United States). Environmental Science Division; Diercks, Dwight R. [Argonne National Lab., IL (United States). Nuclear Engineering Division; Ma, David Chia-Chiun [Argonne National Lab., IL (United States). Environmental Science Division; Garud, Yogendra S. [Argonne National Lab., IL (United States). Environmental Science Division

    2013-12-17T23:59:59.000Z

    At the request of the United States (U.S.) government, the International Atomic Energy Agency (IAEA) assembled a team of 20 senior safety experts to review the regulatory framework for the safety of operating nuclear power plants in the United States. This review focused on the effectiveness of the regulatory functions implemented by the NRC and on its commitment to nuclear safety and continuous improvement. One suggestion resulting from that review was that the U.S. Nuclear Regulatory Commission (NRC) incorporate lessons learned from periodic safety reviews (PSRs) performed in other countries as an input to the NRC’s assessment processes. In the U.S., commercial nuclear power plants (NPPs) are granted an initial 40-year operating license, which may be renewed for additional 20-year periods, subject to complying with regulatory requirements. The NRC has established a framework through its inspection, and operational experience processes to ensure the safe operation of licensed nuclear facilities on an ongoing basis. In contrast, most other countries do not impose a specific time limit on the operating licenses for NPPs, they instead require that the utility operating the plant perform PSRs, typically at approximately 10-year intervals, to assure continued safe operation until the next assessment. The staff contracted with Argonne National Laboratory (Argonne) to perform a pilot review of selected translated PSR assessment reports and related documentation from foreign nuclear regulatory authorities to identify any potential new regulatory insights regarding license renewal-related topics and NPP operating experience (OpE). A total of 14 PSR assessment documents from 9 countries were reviewed. For all of the countries except France, individual reports were provided for each of the plants reviewed. In the case of France, three reports were provided that reviewed the performance assessment of thirty-four 900-MWe reactors of similar design commissioned between 1978 and 1988. All of the reports reviewed were the regulator’s assessment of the PSR findings rather than the original PSR report, and all but one were English translations from the original language. In these reviews, it was found that most of the countries base their regulatory guidance to some extent (and often to a large extent) on U.S. design codes and standards, NRC regulatory guidance, and U.S. industry guidance. In addition, many of the observed operational technical issues and OpE events reported for U.S. reactors are also cited in the PSR reports. The PSR reports also identified a number of potential technical material/component performance issues and OpE events that are not commonly reported for U.S. plants.

  1. Molecular states with hidden charm and strange in QCD Sum Rules

    E-Print Network [OSTI]

    Cong-Feng Qiao; Liang Tang

    2014-07-08T23:59:59.000Z

    This work uses the QCD Sum Rules to study the masses of the $D_s \\bar{D}_s^*$ and $D_s^* \\bar{D}_s^*$ molecular states with quantum numbers $J^{PC} = 1^{+-}$. Interpolating currents with definite C-parity are employed, and the contributions up to dimension eight in the Operator Product Expansion (OPE) are taken into account. The results indicate that two hidden strange charmonium-like states may exist in the energy ranges of $3.83 \\sim 4.13 $ GeV and $4.22 \\sim 4.54 $ GeV, respectively. The hidden strange charmonium-like states predicted in this work may be accessible in future experiments, e.g. BESIII, BelleII and SuperB. Possible decay modes, which may be useful in further research, are predicted.

  2. The ${\\mathcal N}=2$ superconformal bootstrap

    E-Print Network [OSTI]

    Christopher Beem; Madalena Lemos; Pedro Liendo; Leonardo Rastelli; Balt C. van Rees

    2014-12-23T23:59:59.000Z

    In this work we initiate the conformal bootstrap program for ${\\mathcal N}=2$ superconformal field theories in four dimensions. We promote an abstract operator-algebraic viewpoint in order to unify the description of Lagrangian and non-Lagrangian theories, and formulate various conjectures concerning the landscape of theories. We analyze in detail the four-point functions of flavor symmetry current multiplets and of ${\\mathcal N}=2$ chiral operators. For both correlation functions we review the solution of the superconformal Ward identities and describe their superconformal block decompositions. This provides the foundation for an extensive numerical analysis discussed in the second half of the paper. We find a large number of constraints for operator dimensions, OPE coefficients, and central charges that must hold for any ${\\mathcal N}=2$ superconformal field theory.

  3. Boundary and Interface CFTs from the Conformal Bootstrap

    E-Print Network [OSTI]

    Gliozzi, F; Meineri, M; Rago, A

    2015-01-01T23:59:59.000Z

    We explore some consequences of the crossing symmetry for defect conformal field theories, focusing on codimension one defects like flat boundaries or interfaces. We study surface transitions of the 3d Ising and other O(N) models through numerical solutions to the crossing equations with the method of determinants. In the extraordinary transition, where the low-lying spectrum of the surface operators is known, we use the bootstrap equations to obtain information on the bulk spectrum of the theory. In the ordinary transition the knowledge of the low-lying bulk spectrum allows to calculate the scale dimension of the relevant surface operator, which compares well with known results of two-loop calculations in 3d. Estimates of various OPE coefficients are also obtained. We also analyze in 4-epsilon dimensions the renormalization group interface between the O(N) model and the free theory and check numerically the results in 3d.

  4. Renyi Entropies, the Analytic Bootstrap, and 3D Quantum Gravity at Higher Genus

    E-Print Network [OSTI]

    Headrick, Matthew; Perlmutter, Eric; Zadeh, Ida G

    2015-01-01T23:59:59.000Z

    We compute the contribution of the vacuum Virasoro representation to the genus-two partition function of an arbitrary CFT with central charge $c>1$. This is the perturbative pure gravity partition function in three dimensions. We employ a sewing construction, in which the partition function is expressed as a sum of sphere four-point functions of Virasoro vacuum descendants. For this purpose, we develop techniques to efficiently compute correlation functions of holomorphic operators, which by crossing symmetry are determined exactly by a finite number of OPE coefficients; this is an analytic implementation of the conformal bootstrap. Expanding the results in $1/c$, corresponding to the semiclassical bulk gravity expansion, we find that---unlike at genus one---the result does not truncate at finite loop order. Our results also allow us to extend earlier work on multiple-interval Renyi entropies and on the partition function in the separating degeneration limit.

  5. The Bootstrap Program for Boundary CFT_d

    E-Print Network [OSTI]

    Pedro Liendo; Leonardo Rastelli; Balt C. van Rees

    2014-10-29T23:59:59.000Z

    We study the constraints of crossing symmetry and unitarity for conformal field theories in the presence of a boundary, with a focus on the Ising model in various dimensions. We show that an analytic approach to the bootstrap is feasible for free-field theory and at one loop in the epsilon expansion, but more generally one has to resort to numerical methods. Using the recently developed linear programming techniques we find several interesting bounds for operator dimensions and OPE coefficients and comment on their physical relevance. We also show that the "boundary bootstrap" can be easily applied to correlation functions of tensorial operators and study the stress tensor as an example. In the appendices we present conformal block decompositions of a variety of physically interesting correlation functions.

  6. The ${\\mathcal N}=2$ superconformal bootstrap

    E-Print Network [OSTI]

    Beem, Christopher; Liendo, Pedro; Rastelli, Leonardo; van Rees, Balt C

    2014-01-01T23:59:59.000Z

    In this work we initiate the conformal bootstrap program for ${\\mathcal N}=2$ superconformal field theories in four dimensions. We promote an abstract operator-algebraic viewpoint in order to unify the description of Lagrangian and non-Lagrangian theories, and formulate various conjectures concerning the landscape of theories. We analyze in detail the four-point functions of flavor symmetry current multiplets and of ${\\mathcal N}=2$ chiral operators. For both correlation functions we review the solution of the superconformal Ward identities and describe their superconformal block decompositions. This provides the foundation for an extensive numerical analysis discussed in the second half of the paper. We find a large number of constraints for operator dimensions, OPE coefficients, and central charges that must hold for any ${\\mathcal N}=2$ superconformal field theory.

  7. More constraining conformal bootstrap

    E-Print Network [OSTI]

    Ferdinando Gliozzi

    2013-10-18T23:59:59.000Z

    Recently an efficient numerical method has been developed to implement the constraints of crossing symmetry and unitarity on the operator dimensions and OPE coefficients of conformal field theories (CFT) in diverse space-time dimensions. It appears that the calculations can be done only for theories lying at the boundary of the allowed parameter space. Here it is pointed out that a similar method can be applied to a larger class of CFT's, whether unitary or not, and no free parameter remains, provided we know the fusion algebra of the low lying primary operators. As an example we calculate using first principles, with no phenomenological input, the lowest scaling dimensions of the local operators associated with the Yang-Lee edge singularity in three and four space dimensions. The edge exponents compare favorably with the latest numerical estimates. A consistency check of this approach on the 3d critical Ising model is also made.

  8. Analytic bootstrap at large spin

    E-Print Network [OSTI]

    Apratim Kaviraj; Kallol Sen; Aninda Sinha

    2015-03-24T23:59:59.000Z

    We use analytic conformal bootstrap methods to determine the anomalous dimensions and OPE coefficients for large spin operators in general conformal field theories in four dimensions containing a scalar operator of conformal dimension $\\Delta_\\phi$. It is known that such theories will contain an infinite sequence of large spin operators with twists approaching $2\\Delta_\\phi+2n$ for each integer $n$. By considering the case where such operators are separated by a twist gap from other operators at large spin, we analytically determine the $n$, $\\Delta_\\phi$ dependence of the anomalous dimensions. We find that for all $n$, the anomalous dimensions are negative for $\\Delta_\\phi$ satisfying the unitarity bound, thus extending the Nachtmann theorem to non-zero $n$. In the limit when $n$ is large, we find agreement with the AdS/CFT prediction corresponding to the Eikonal limit of a 2-2 scattering with dominant graviton exchange.

  9. Renyi Entropies, the Analytic Bootstrap, and 3D Quantum Gravity at Higher Genus

    E-Print Network [OSTI]

    Matthew Headrick; Alexander Maloney; Eric Perlmutter; Ida G. Zadeh

    2015-03-24T23:59:59.000Z

    We compute the contribution of the vacuum Virasoro representation to the genus-two partition function of an arbitrary CFT with central charge $c>1$. This is the perturbative pure gravity partition function in three dimensions. We employ a sewing construction, in which the partition function is expressed as a sum of sphere four-point functions of Virasoro vacuum descendants. For this purpose, we develop techniques to efficiently compute correlation functions of holomorphic operators, which by crossing symmetry are determined exactly by a finite number of OPE coefficients; this is an analytic implementation of the conformal bootstrap. Expanding the results in $1/c$, corresponding to the semiclassical bulk gravity expansion, we find that---unlike at genus one---the result does not truncate at finite loop order. Our results also allow us to extend earlier work on multiple-interval Renyi entropies and on the partition function in the separating degeneration limit.

  10. Analytic bootstrap at large spin

    E-Print Network [OSTI]

    Kaviraj, Apratim; Sinha, Aninda

    2015-01-01T23:59:59.000Z

    We use analytic conformal bootstrap methods to determine the anomalous dimensions and OPE coefficients for large spin operators in general conformal field theories in four dimensions containing a scalar operator of conformal dimension $\\Delta_\\phi$. It is known that such theories will contain an infinite sequence of large spin operators with twists approaching $2\\Delta_\\phi+2n$ for each integer $n$. By considering the case where such operators are separated by a twist gap from other operators at large spin, we analytically determine the $n$, $\\Delta_\\phi$ dependence of the anomalous dimensions. We find that for all $n$, the anomalous dimensions are negative for $\\Delta_\\phi$ satisfying the unitarity bound, thus extending the Nachtmann theorem to non-zero $n$. In the limit when $n$ is large, we find agreement with the AdS/CFT prediction corresponding to the Eikonal limit of a 2-2 scattering with dominant graviton exchange.

  11. Solving the 3d Ising Model with the Conformal Bootstrap II. c-Minimization and Precise Critical Exponents

    E-Print Network [OSTI]

    Sheer El-Showk; Miguel F. Paulos; David Poland; Slava Rychkov; David Simmons-Duffin; Alessandro Vichi

    2014-06-04T23:59:59.000Z

    We use the conformal bootstrap to perform a precision study of the operator spectrum of the critical 3d Ising model. We conjecture that the 3d Ising spectrum minimizes the central charge c in the space of unitary solutions to crossing symmetry. Because extremal solutions to crossing symmetry are uniquely determined, we are able to precisely reconstruct the first several Z2-even operator dimensions and their OPE coefficients. We observe that a sharp transition in the operator spectrum occurs at the 3d Ising dimension Delta_sigma=0.518154(15), and find strong numerical evidence that operators decouple from the spectrum as one approaches the 3d Ising point. We compare this behavior to the analogous situation in 2d, where the disappearance of operators can be understood in terms of degenerate Virasoro representations.

  12. Bootstrapping SCFTs with Four Supercharges

    E-Print Network [OSTI]

    Bobev, Nikolay; Mazac, Dalimil; Paulos, Miguel F

    2015-01-01T23:59:59.000Z

    We study the constraints imposed by superconformal symmetry, crossing symmetry, and unitarity for theories with four supercharges in spacetime dimension $2\\leq d\\leq 4$. We show how superconformal algebras with four Poincar\\'{e} supercharges can be treated in a formalism applicable to any, in principle continuous, value of $d$ and use this to construct the superconformal blocks for any $d\\leq 4$. We then use numerical bootstrap techniques to derive upper bounds on the conformal dimension of the first unprotected operator appearing in the OPE of a chiral and an anti-chiral superconformal primary. We obtain an intriguing structure of three distinct kinks. We argue that one of the kinks smoothly interpolates between the $d=2$, $\\mathcal N=(2,2)$ minimal model with central charge $c=1$ and the theory of a free chiral multiplet in $d=4$, passing through the critical Wess-Zumino model with cubic superpotential in intermediate dimensions.

  13. Boundary and Interface CFTs from the Conformal Bootstrap

    E-Print Network [OSTI]

    F. Gliozzi; P. Liendo; M. Meineri; A. Rago

    2015-05-12T23:59:59.000Z

    We explore some consequences of the crossing symmetry for defect conformal field theories, focusing on codimension one defects like flat boundaries or interfaces. We study surface transitions of the 3d Ising and other O(N) models through numerical solutions to the crossing equations with the method of determinants. In the extraordinary transition, where the low-lying spectrum of the surface operators is known, we use the bootstrap equations to obtain information on the bulk spectrum of the theory. In the ordinary transition the knowledge of the low-lying bulk spectrum allows to calculate the scale dimension of the relevant surface operator, which compares well with known results of two-loop calculations in 3d. Estimates of various OPE coefficients are also obtained. We also analyze in 4-epsilon dimensions the renormalization group interface between the O(N) model and the free theory and check numerically the results in 3d.

  14. Crystalline free energies of micelles of diblock copolymer solutions

    E-Print Network [OSTI]

    D'Adamo, Giuseppe; 10.1063/1.3509391

    2012-01-01T23:59:59.000Z

    We report a characterization of the relative stability and structural behavior of various micellar crystals of an athermal model of AB-diblock copolymers in solution. We adopt a previously devel- oped coarse-graining representation of the chains which maps each copolymer on a soft dumbbell. Thanks to this strong reduction of degrees of freedom, we are able to investigate large aggregated systems, and for a specific length ratio of the blocks f = MA/(MA + MB) = 0.6, to locate the order-disorder transition of the system of micelles. Above the transition, mechanical and thermal properties are found to depend on the number of particles per lattice site in the simulation box, and the application of a recent methodology for multiple occupancy crystals (B.M. Mladek et al., Phys. Rev. Lett. 99, 235702 (2007)) is necessary to correctly define the equilibrium state. Within this scheme we have performed free energy calculations at two reduced density {\\rho}/{\\rho}\\ast = 4,5 and for several cubic structures as FCC,BCC,A1...

  15. A Natural Language for AdS/CFT Correlators

    SciTech Connect (OSTI)

    Fitzpatrick, A.Liam; /Boston U.; Kaplan, Jared; /SLAC; Penedones, Joao; /Perimeter Inst. Theor. Phys.; Raju, Suvrat; /Harish-Chandra Res. Inst.; van Rees, Balt C.; /YITP, Stony Brook

    2012-02-14T23:59:59.000Z

    We provide dramatic evidence that 'Mellin space' is the natural home for correlation functions in CFTs with weakly coupled bulk duals. In Mellin space, CFT correlators have poles corresponding to an OPE decomposition into 'left' and 'right' sub-correlators, in direct analogy with the factorization channels of scattering amplitudes. In the regime where these correlators can be computed by tree level Witten diagrams in AdS, we derive an explicit formula for the residues of Mellin amplitudes at the corresponding factorization poles, and we use the conformal Casimir to show that these amplitudes obey algebraic finite difference equations. By analyzing the recursive structure of our factorization formula we obtain simple diagrammatic rules for the construction of Mellin amplitudes corresponding to tree-level Witten diagrams in any bulk scalar theory. We prove the diagrammatic rules using our finite difference equations. Finally, we show that our factorization formula and our diagrammatic rules morph into the flat space S-Matrix of the bulk theory, reproducing the usual Feynman rules, when we take the flat space limit of AdS/CFT. Throughout we emphasize a deep analogy with the properties of flat space scattering amplitudes in momentum space, which suggests that the Mellin amplitude may provide a holographic definition of the flat space S-Matrix.

  16. Computer Playback Issue 5

    E-Print Network [OSTI]

    Multiple Contributors

    1981-01-01T23:59:59.000Z

    you will curtail :iour /fjOVements -to a small.e:tl scale. 'The engineer' repopl;s YOU'Ll z.OP(~~S Play ho:voc wi tii his f33i3mo8(.~opeB." The si;arf'l.ee"t Jocs 'l~n$fJec-teu. rJim., A hOi?e Less case, his prospects gY1im. liO Joo in {-;'tar;FZ... !\\~Croy norld,,-:d (~\\J.t't.1 y. "~)f;rJt in f ['CHi) ;-;-t;r-u.'baflP hfinc'!. Bre;:d;h(~ dp cply.1I Str-l.:cbFl~~(-; ;-'Tin',::. r'.I!Aciical i~:Or.'p~': fl'ca-iD.lnc ~Rnt(.:r'. pic'ions r;onf.'i,rmptj, Yirk d-id HS he '!.fa? in:-;t;~~\\,lct,(~d l...

  17. Using architecture information and real-time resource state to reduce power consumption and communication costs in parallel applications.

    SciTech Connect (OSTI)

    Brandt, James M.; Devine, Karen D. [Sandia National Laboratories, Albuquerque, NM; Gentile, Ann C. [Sandia National Laboratories, Albuquerque, NM; Leung, Vitus J. [Sandia National Laboratories, Albuquerque, NM; Olivier, Stephen Lecler [Sandia National Laboratories, Albuquerque, NM; Pedretti, Kevin [Sandia National Laboratories, Albuquerque, NM; Rajamanickam, Sivasankaran [Sandia National Laboratories, Albuquerque, NM; Bunde, David P. [Sandia National Laboratories, Albuquerque, NM; Deveci, Mehmet; Catalyurek, Umit V.

    2014-09-01T23:59:59.000Z

    As computer systems grow in both size and complexity, the need for applications and run-time systems to adjust to their dynamic environment also grows. The goal of the RAAMP LDRD was to combine static architecture information and real-time system state with algorithms to conserve power, reduce communication costs, and avoid network contention. We devel- oped new data collection and aggregation tools to extract static hardware information (e.g., node/core hierarchy, network routing) as well as real-time performance data (e.g., CPU uti- lization, power consumption, memory bandwidth saturation, percentage of used bandwidth, number of network stalls). We created application interfaces that allowed this data to be used easily by algorithms. Finally, we demonstrated the benefit of integrating system and application information for two use cases. The first used real-time power consumption and memory bandwidth saturation data to throttle concurrency to save power without increasing application execution time. The second used static or real-time network traffic information to reduce or avoid network congestion by remapping MPI tasks to allocated processors. Results from our work are summarized in this report; more details are available in our publications [2, 6, 14, 16, 22, 29, 38, 44, 51, 54].

  18. Decay constants of heavy-light vector mesons from QCD sum rules

    E-Print Network [OSTI]

    Patrick Gelhausen; Alexander Khodjamirian; Alexei A. Pivovarov; Denis Rosenthal

    2015-03-27T23:59:59.000Z

    We revisit QCD sum rules for the decay constants of heavy-light mesons. In the sum rules for the vector mesons B^*_(s) and D^*_(s) we improve the accuracy of OPE, taking into account the O(alpha_s^2) terms in the perturbative part and calculating the O(alpha_s) corrections to the quark-condensate contribution. With this accuracy, we obtain the ratios of decay constants: f_B^*/f_B=1.02 +0.07 -0.03, f_D^*/f_D=1.20 +0.10 -0.07. The sum rule predictions for the decay constants of pseudoscalar mesons are updated with the results f_B=(207 +17 -9) MeV, f_B_s=(242 +17 -12) MeV, f_D=(201 +12 -13) MeV, f_D_s=(238 +13 -23) MeV. In order to assess the sensitivity of our calculation to the form of the sum rule, we consider alternative versions such as the power moments and Borel sum rules with different weights of the spectral density. We also investigated the heavy quark limit of the sum rules for vector and pseudoscalar mesons, estimating the violations of the heavy-quark spin and flavour symmetry.

  19. Universality of Long-Distance AdS Physics from the CFT Bootstrap

    E-Print Network [OSTI]

    A. Liam Fitzpatrick; Jared Kaplan; Matthew T. Walters

    2014-07-10T23:59:59.000Z

    We begin by explicating a recent proof of the cluster decomposition principle in AdS_{d+1} from the CFT_d bootstrap in d > 2. The CFT argument also computes the leading interactions between distant objects in AdS, and we confirm the universal agreement between the CFT bootstrap and AdS gravity in the semi-classical limit. We proceed to study the generalization to 2d CFTs, which requires knowledge of the Virasoro conformal blocks in a lightcone OPE limit. We compute these blocks in a semiclassical, large central charge approximation, and use them to prove a suitably modified theorem. In particular, from the 2d bootstrap we prove the existence of large spin operators with fixed 'anomalous dimensions' indicative of the presence of deficit angles in AdS_3. As we approach the threshold for the BTZ black hole, interpreted as a CFT scaling dimension, the twist spectrum of large spin operators becomes dense. Due to the exchange of the Virasoro identity block, primary states above the BTZ threshold mimic a thermal background for light operators. We derive the BTZ quasi-normal modes, and we use the bootstrap equation to prove that the twist spectrum is dense. Corrections to thermality could be obtained from a more refined computation of the Virasoro conformal blocks.

  20. Measurement of the Nucleon Structure Function F2 in the Nuclear Medium and Evaluation of its Moments

    SciTech Connect (OSTI)

    M. Osipenko

    2010-11-01T23:59:59.000Z

    We report on the measurement of inclusive electron scattering off a carbon target performed with CLAS at Jefferson Laboratory. A combination of three different beam energies 1.161, 2.261 and 4.461 GeV allowed us to reach an invariant mass of the final-state hadronic system W~2.4 GeV with four-momentum transfers Q2 ranging from 0.2 to 5 GeV2. These data, together with previous measurements of the inclusive electron scattering off proton and deuteron, which cover a similar continuous two-dimensional region of Q2 and Bjorken variable x, permit the study of nuclear modifications of the nucleon structure. By using these, as well as other world data, we evaluated the F2 structure function and its moments. Using an OPE-based twist expansion, we studied the Q2-evolution of the moments, obtaining a separation of the leading-twist and the total higher-twist terms. The carbon-to-deuteron ratio of the leading-twist contributions to the F2 moments exhibits the well known EMC effect, compatible with that discovered previously in x-space. The total higher-twist term in the carbon nucleus appears, although with large systematic uncertainites, to be smaller with respect to the deuteron case for n<7, suggesting partial parton deconfinement in nuclear matter. We speculate that the spatial extension of the nucleon is changed when it is immersed in the nuclear medium.

  1. High-momentum tails from low-momentum effective theories

    E-Print Network [OSTI]

    S. K. Bogner; D. Roscher

    2012-08-08T23:59:59.000Z

    In a recent work \\cite{Anderson:2010aq}, Anderson \\emph{et al.} used the renormalization group (RG) evolution of the momentum distribution to show that, under appropriate conditions, operator expectation values exhibit factorization in the two-nucleon system. Factorization is useful because it provides a clean separation of long- and short-distance physics, and suggests a possible interpretation of the universal high-momentum dependence and scaling behavior found in nuclear momentum distributions. In the present work, we use simple decoupling and scale-separation arguments to extend the results of Ref. \\cite{Anderson:2010aq} to arbitrary low-energy $A$-body states. Using methods that are reminiscent of the operator product expansion (OPE) in quantum field theory, we find that the high-momentum tails of momentum distributions and static structure factors factorize into the product of a universal function of momentum that is fixed by two-body physics, and a state-dependent matrix element that is the same for both and is sensitive only to low-momentum structure of the many-body state. As a check, we apply our factorization relations to two well-studied systems, the unitary Fermi gas and the electron gas, and reproduce known expressions for the high-momentum tails of each.

  2. Carbon-carbon bond cleavage of 1,2-hydroxy ethers b7 vanadium(V) dipicolinate complexes

    SciTech Connect (OSTI)

    Hanson, Susan K [Los Alamos National Laboratory; Gordon, John C [Los Alamos National Laboratory; Thorn, David L [Los Alamos National Laboratory; Scott, Brian L [Los Alamos National Laboratory; Baker, R Tom [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    The development of alternatives to current petroleum-based fuels and chemicals is becoming increasingly important due to concerns over climate change, growing world energy demand, and energy security issues. Using non-food derived biomass to produce renewable feedstocks for chemicals and fuels is a particularly attractive possibility. However, the majority of biomass is in the form of lignocellulose, which is often not fully utilized due to difficulties associated with breaking down both lignin and cellulose. Recently, a number of methods have been reported to transform cellulose directly into more valuable materials such as glucose, sorbitol, 5-(chloromethyl)furfural, and ethylene glycol. Less progress has been made with selective transformations of lignin, which is typically treated in paper and forest industries by kraft pulping (sodium hydroxide/sodium sulfide) or incineration. Our group has begun investigating aerobic oxidative C-C bond cleavage catalyzed by dipicolinate vanadium complexes, with the idea that a selective C-C cleavage reaction of this type could be used to produce valuable chemicals or intermediates from cellulose or lignin. Lignin is a randomized polymer containing methoxylated phenoxy propanol units. A number of different linkages occur naturally; one of the most prevalent is the {beta}-O-4 linkage shown in Figure 1, containing a C-C bond with 1,2-hydroxy ether substituents. While the oxidative C-C bond cleavage of 1,2-diols has been reported for a number of metals, including vanadium, iron, manganese, ruthenium, and polyoxometalate complexes, C-C bond cleavage of 1,2-hydroxy ethers is much less common. We report herein vanadium-mediated cleavage of C-C bonds between alcohol and ether functionalities in several lignin model complexes. In order to explore the scope and potential of vanadium complexes to effect oxidative C-C bond cleavage in 1,2-hydroxy ethers, we examined the reactivity of the lignin model complexes pinacol monomethyl ether (A), 2-phenoxyethanol (B), and 1,2-diphenyl-2-methoxyethanol (C) (Figure 1). Reaction of (dipic)V{sup V}(O)O{sup i}Pr (1a) or (dipic)V{sup v}(O)OEt (lb) with A, B, or C in acetonitrile yielded new vanadium(V) complexes where the alcohol-ether ligand was bound in a chelating fashion. From the reaction of 1b with pinacol monomethyl ether (A) in acetonitrile solution, (dipic)V{sup v}(O)(pinOMe) (2) (PinOMe = 2,3-dimethyl-3-methoxy-2-butanoxide) was isolated in 61 % yield. Reaction of 1b with 2-phenoxyethanol (B) in acetonitrile gave the new complex (dipic)V{sup v}(O)(OPE) (3) (OPE = 2-phenoxyethoxide), which was isolated in 76% yield. In a similar fashion, 1a reacted with 1,2-diphenyl-2-methoxyethanol (C) to give (dipic)V(O)(DPME) (4) (DPME = 1,2-diphenyl-2-methoxyethoxide), which was isolated in 39% yield. Complexes 2, 3, and 4 were characterized by {sup 1}H NMR and IR spectroscopy, elemental analysis, and X-ray crystallography. Compared to the previously reported vanadium(V) pinacolate complex (dipic)V(O)(pinOH) the X-ray structure of complex 2 reveals a slightly shorter V = O bond, 1.573(2) {angstrom} vs 1.588(2) {angstrom} for the pinOH structure. Complexes 3 and 4 display similar vanadium oxo bond distances of 1.568(2) {angstrom} and 1.576(2) {angstrom}, respectively. All three complexes show longer bonds to the ether-oxygen trans to the oxo (2.388(2) {angstrom} for 2, 2.547(2) {angstrom} for 3, and 2.438(2) {angstrom} for 4) than to the hydroxy-oxygen in the pinOH structure (2.252(2) {angstrom}).

  3. Crystalline free energies of micelles of diblock copolymer solutions

    E-Print Network [OSTI]

    Giuseppe D'Adamo; Carlo Pierleoni

    2012-01-06T23:59:59.000Z

    We report a characterization of the relative stability and structural behavior of various micellar crystals of an athermal model of AB-diblock copolymers in solution. We adopt a previously devel- oped coarse-graining representation of the chains which maps each copolymer on a soft dumbbell. Thanks to this strong reduction of degrees of freedom, we are able to investigate large aggregated systems, and for a specific length ratio of the blocks f = MA/(MA + MB) = 0.6, to locate the order-disorder transition of the system of micelles. Above the transition, mechanical and thermal properties are found to depend on the number of particles per lattice site in the simulation box, and the application of a recent methodology for multiple occupancy crystals (B.M. Mladek et al., Phys. Rev. Lett. 99, 235702 (2007)) is necessary to correctly define the equilibrium state. Within this scheme we have performed free energy calculations at two reduced density {\\rho}/{\\rho}\\ast = 4,5 and for several cubic structures as FCC,BCC,A15. At both densities, the BCC symmetry is found to correspond to the minimum of the unconstrained free energy, that is to the stable symmetry among the few considered, while the A15 structure is almost degenerate, indicating that the present sys- tem prefers to crystallize in less packed structures. At {\\rho}/{\\rho}\\ast = 4 close to melting, the Lindemann ratio is fairly high (~ 0.29) and the concentration of vacancies is roughly 6%. At {\\rho}/{\\rho}\\ast = 5 the mechanical stability of the stable BCC structure increases and the concentration of vacancies ac- cordingly decreases. The ratio of the corona layer thickness to the core radius is found to be in good agreement with experimental data for poly(styrene-b-isoprene)(22-12) in isoprene selective solvent which is also reported to crystallize in the BCC structure.

  4. A solution space for a system of null-state partial differential equations 4

    E-Print Network [OSTI]

    Steven M. Flores; Peter Kleban

    2015-02-04T23:59:59.000Z

    This article is the last of four that completely characterize a solution space $\\mathcal{S}_N$ for a homogeneous system of $2N+3$ linear partial differential equations (PDEs) in $2N$ variables that arises in conformal field theory (CFT) and multiple Schramm-Loewner evolution (SLE). The system comprises $2N$ null-state equations and three conformal Ward identities that govern CFT correlation functions of $2N$ one-leg boundary operators. In the first two articles, we use methods of analysis and linear algebra to prove that $\\dim\\mathcal{S}_N\\leq C_N$, with $C_N$ the $N$th Catalan number. Building on these results in the third article, we prove that $\\dim\\mathcal{S}_N=C_N$ and $\\mathcal{S}_N$ is spanned by (real-valued) solutions constructed with the Coulomb gas (contour integral) formalism of CFT. In this article, we use these results to prove some facts concerning the solution space $\\mathcal{S}_N$. First, we show that each of its elements equals a sum of at most two distinct Frobenius series in powers of the difference between two adjacent points (unless $8/\\kappa$ is odd, in which case a logarithmic term may appear). This establishes an important element in the operator product expansion (OPE) for one-leg boundary operators, assumed in CFT. We also identify particular elements of $\\mathcal{S}_N$, which we call connectivity weights, and exploit their special properties to conjecture a formula for the probability that the curves of a multiple-SLE$_\\kappa$ process join in a particular connectivity. Finally, we propose a reason for why the "exceptional speeds" (certain $\\kappa$ values that appeared in the analysis of the Coulomb gas solutions in the third article) and the minimal models of CFT are connected.

  5. The Earth System Grid Center for Enabling Technologies: Focusing Technologies on Climate Datasets and Resource Needs

    SciTech Connect (OSTI)

    Williams, Dean N. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2007-09-26T23:59:59.000Z

    This report discusses a project that used prototyping technology to access and analyze climate data. This project was initially funded under the DOE’s Next Generation Internet (NGI) program, with follow-on support from BER and the Mathematical, Information, and Computational Sciences (MICS) office. In this prototype, we developed Data Grid technologies for managing the movement and replication of large datasets, and applied these technologies in a practical setting (i.e., an ESG-enabled data browser based on current climate data analysis tools), achieving cross-country transfer rates of more than 500 Mb/s. Having demonstrated the potential for remotely accessing and analyzing climate data located at sites across the U.S., we won the “Hottest Infrastructure” award in the Network Challenge event. While the ESG I prototype project substantiated a proof of concept (“Turning Climate Datasets into Community Resources”), the SciDAC Earth System Grid (ESG) II project made this a reality. Our efforts targeted the development of metadata technologies (standard schema, XML metadata extraction based on netCDF, and a Metadata Catalog Service), security technologies (Web-based user registration and authentication, and community authorization), data transport technologies (GridFTPenabled OPeNDAP-G for high-performance access, robust multiple file transport and integration with mass storage systems, and support for dataset aggregation and subsetting), as well as web portal technologies to provide interactive access to climate data holdings. At this point, the technology was in place and assembled, and ESG II was poised to make a substantial impact on the climate modelling community.

  6. Earth System Grid Center for Enabling Technologies (ESG-CET): A Data Infrastructure for Data-Intensive Climate Research

    SciTech Connect (OSTI)

    Williams, Dean N. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2011-06-03T23:59:59.000Z

    For the Earth System Grid Federation (ESGF), the ESG-CET team has led international development and delivered a production environment for managing and accessing ultrascale climate data. This production environment includes multiple national and international climate projects (e.g., Couple Model Intercomparison Project, Community Earth System Model), ocean model data (such as the Parallel Ocean Program), observation data (Carbon Dioxide Information and Analysis Center, Atmospheric Infrared Sounder, and so forth), and analysis and visualization tools, all of which serve a diverse community of users. These data holdings and services are distributed across multiple ESG-CET sites (such as LANL, LBNL, LLNL, NCAR, and ORNL) as well as at unfunded partners sites such as the Australian National University National Computational Infrastructure, the British Atmospheric Data Centre, the National Oceanic and Atmospheric Administration Geophysical Fluid Dynamics Laboratory, the Max Planck Institute for Meteorology, the German Climate Computing Centre, and the National Aeronautics and Space Administration Jet Propulsion Laboratory. More recently, ESG-CET has been extending services beyond data-file access and delivery to develop more detailed information products (scientific graphics, animations, etc.), secure binary data-access services (based upon the OPeNDAP protocol), and server-side analysis capabilities. These will allow users to request data subsets transformed through commonly used analysis and intercomparison procedures. As we transition from development activities to production and operations, the ESG-CET team is tasked with making data available to all users seeking to understand, process, extract value from, visualize, and/or communicate it to others. This ongoing effort, though daunting in scope and complexity, will greatly magnify the value of numerical climate model outputs and climate observations for future national and international climate-assessment reports. Continued ESGF progress will result in a production ultrascale data system for empowering scientists who attempt new and exciting data exchanges that could ultimately lead to breakthrough climate-science discoveries.

  7. Real-Time Control of Diesel Combustion Quality

    SciTech Connect (OSTI)

    Wagner, R.M.; Sisken, K (Detroit Diesel Corp.)

    2010-06-30T23:59:59.000Z

    Detroit Diesel Corporation (DDC) and ORNL established this CRADA to improve heavy-duty engine efficiency with reduced emissions at relatively extreme operating regimes such has high EGR, low-load, and cold-start, with an emphasis on the application of advanced control strategies. The approach used in this collaborative effort was to include the application of novel analysis and modeling techniques devel-oped from the application of nonlinear dynamics and chaos theory. More specifically, analytical tech-niques derived from these theories were to used to detect, characterize, and control the combustion insta-bilities that are responsible for poor combustion performance and corresponding high emissions. The foundation of this CRADA was established based on ORNL expertise on the fundamentals of ad-vanced combustion operation and experience with nonlinear dynamics and controls in combustion sys-tems. The initial plan was all data generation would be performed at DDC with an agreed upon experi-mental plan formed by both organizations. While numerous experiments were performed at DDC and the data was exchanged with ORNL researchers, the team decided to transfer an engine to ORNL to allow more flexibility and data generation opportunities. A prototype DDC Series 60 with a common rail fuel system was selected and installed at ORNL. DDC and ORNL maintained a strong collaboration throughout much of this project. Direct funding from DOE ended in 2004 and DDC continued to fund at a reduced amount through 2007. This CRADA has not been funded in more recent years but has been maintained active in anticipation of restored funding. This CRADA has led to additional collaborations between DDC and ORNL.

  8. BEAM DYNAMICS IN NS-FFAG EMMAWITH DYNAMICAL MAPS

    E-Print Network [OSTI]

    Giboudot, Y; Edgecock, R; Wolski, A

    2010-01-01T23:59:59.000Z

    The Non Scal­ing Fixed Field Al­ter­nat­ing Gra­di­ent EMMA has a com­pact lin­ear lat­tice. Ef­fect of Fringe Field on the beam has to be stud­ied care­ful­ly. A nu­mer­i­cal mag­net­ic field map is gen­er­at­ed by mag­net mea­sure­ments or mag­net de­sign soft­wares. We de­vel­oped a tech­nique that pro­duces from the nu­mer­i­cal field map, a dy­nam­i­cal map for a par­ti­cle trav­el­ling in the en­tire EMMA cell for a ref­er­ence en­er­gy with­out ac­cel­er­a­tion. Since the beam dy­nam­ics change with en­er­gy, a set of maps have been pro­duce with dif­fer­ent ref­er­ence en­er­gies be­tween 10 and 20MeV. For each ref­er­ence en­er­gy, sim­u­lat­ed tune and time of flight (TOF) have been com­pared with re­sults in Zgoubi - track­ing di­rect­ly through nu­mer­i­cal field map. The range of va­lid­i­ty of a sin­gle map has been in­ves­ti­gat­ed by track­ing par­ti­cle with large en­er­gy de­vi­a­tion. From that, a ...

  9. DOE SciDAC's Earth System Grid Center for Enabling Technologies Final Report

    SciTech Connect (OSTI)

    Williams, Dean N. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2011-09-27T23:59:59.000Z

    The mission of the Earth System Grid Federation (ESGF) is to provide the worldwide climate-research community with access to the data, information, model codes, analysis tools, and intercomparison capabilities required to make sense of enormous climate data sets. Its specific goals are to (1) provide an easy-to-use and secure web-based data access environment for data sets; (2) add value to individual data sets by presenting them in the context of other data sets and tools for comparative analysis; (3) address the specific requirements of participating organizations with respect to bandwidth, access restrictions, and replication; (4) ensure that the data are readily accessible through the analysis and visualization tools used by the climate research community; and (5) transfer infrastructure advances to other domain areas. For the ESGF, the U.S. Department of Energy's (DOE's) Earth System Grid Center for Enabling Technologies (ESG-CET) team has led international development and delivered a production environment for managing and accessing ultra-scale climate data. This production environment includes multiple national and international climate projects (such as the Community Earth System Model and the Coupled Model Intercomparison Project), ocean model data (such as the Parallel Ocean Program), observation data (Atmospheric Radiation Measurement Best Estimate, Carbon Dioxide Information and Analysis Center, Atmospheric Infrared Sounder, etc.), and analysis and visualization tools, all serving a diverse user community. These data holdings and services are distributed across multiple ESG-CET sites (such as ANL, LANL, LBNL/NERSC, LLNL/PCMDI, NCAR, and ORNL) and at unfunded partner sites, such as the Australian National University National Computational Infrastructure, the British Atmospheric Data Centre, the National Oceanic and Atmospheric Administration Geophysical Fluid Dynamics Laboratory, the Max Planck Institute for Meteorology, the German Climate Computing Centre, the National Aeronautics and Space Administration Jet Propulsion Laboratory, and the National Oceanic and Atmospheric Administration. The ESGF software is distinguished from other collaborative knowledge systems in the climate community by its widespread adoption, federation capabilities, and broad developer base. It is the leading source for present climate data holdings, including the most important and largest data sets in the global-climate community, and - assuming its development continues - we expect it to be the leading source for future climate data holdings as well. Recently, ESG-CET extended its services beyond data-file access and delivery to include more detailed information products (scientific graphics, animations, etc.), secure binary data-access services (based upon the OPeNDAP protocol), and server-side analysis. The latter capabilities allow users to request data subsets transformed through commonly used analysis and intercomparison procedures. As we transition from development activities to production and operations, the ESG-CET team is tasked with making data available to all users seeking to understand, process, extract value from, visualize, and/or communicate it to others. This ongoing effort, though daunting in scope and complexity, will greatly magnify the value of numerical climate model outputs and climate observations for future national and international climate-assessment reports. The ESG-CET team also faces substantial technical challenges due to the rapidly increasing scale of climate simulation and observational data, which will grow, for example, from less than 50 terabytes for the last Intergovernmental Panel on Climate Change (IPCC) assessment to multiple Petabytes for the next IPCC assessment. In a world of exponential technological change and rapidly growing sophistication in climate data analysis, an infrastructure such as ESGF must constantly evolve if it is to remain relevant and useful. Regretfully, we submit our final report at the end of project funding. To continue to serve the climate-science community, we are

  10. Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 2.

    SciTech Connect (OSTI)

    Thornton, Peter E [ORNL; Thornton, Michele M [ORNL; Mayer, Benjamin W [ORNL; Wilhelmi, Nate [National Center for Atmospheric Research (NCAR); Wei, Yaxing [ORNL; Devarakonda, Ranjeet [ORNL; Cook, Robert B [ORNL

    2014-01-01T23:59:59.000Z

    More information: http://daymet.ornl.gov Presenter: Ranjeet Devarakonda Environmental Sciences Division Oak Ridge National Laboratory (ORNL) Daymet: Daily Surface Weather Data and Climatological Summaries provides gridded estimates of daily weather parameters for North America, including daily continuous surfaces of minimum and maximum temperature, precipitation occurrence and amount, humidity, shortwave radiation, snow water equivalent, and day length. The current data product (Version 2) covers the period January 1, 1980 to December 31, 2013 [1]. The prior product (Version 1) only covered from 1980-2008. Data are available on a daily time step at a 1-km x 1-km spatial resolution in Lambert Conformal Conic projection with a spatial extent that covers the conterminous United States, Mexico, and Southern Canada as meteorological station density allows. Daymet data can be downloaded from 1) the ORNL Distributed Active Archive Center (DAAC) search and order tools (http://daac.ornl.gov/cgi-bin/cart/add2cart.pl?add=1219) or directly from the DAAC FTP site (http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=1219) and 2) the Single Pixel Tool [2] and THREDDS (Thematic Real-time Environmental Data Services) Data Server [3]. The Single Pixel Data Extraction Tool allows users to enter a single geographic point by latitude and longitude in decimal degrees. A routine is executed that translates the (lon, lat) coordinates into projected Daymet (x,y) coordinates. These coordinates are used to access the Daymet database of daily-interpolated surface weather variables. Daily data from the nearest 1 km x 1 km Daymet grid cell are extracted from the database and formatted as a table with one column for each Daymet variable and one row for each day. All daily data for selected years are returned as a single (long) table, formatted for display in the browser window. At the top of this table is a link to the same data in a simple comma-separated text format, suitable for import into a spreadsheet or other data analysis software. The Single Pixel Data Extraction Tool also provides the option to download multiple coordinates programmatically. A multiple extractor script is freely available to download at http://daymet.ornl.gov/files/daymet.zip. The ORNL DAAC s THREDDS data server (TDS) provides customized visualization and access to Daymet time series of North American mosaics. Users can subset and download Daymet data via a variety of community standards, including OPeNDAP, NetCDF Subset service, and Open Geospatial Consortium (OGC) Web Map/Coverage Service. The ORNL DAAC TDS also exposes Daymet metadata through its ncISO service to facilitate harvesting Daymet metadata records into 3rd party catalogs. References: [1] Thornton, P.E., M.M. Thornton, B.W. Mayer, N. Wilhelmi, Y. Wei, R. Devarakonda, and R.B. Cook. 2014. Daymet: Daily Surface Weather Data on a 1-km Grid for North America, Version 2. Data set. Available on-line [http://daac.ornl.gov] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, USA. [2] Devarakonda R., et al. 2012. Daymet: Single Pixel Data Extraction Tool. Available on-line [http://daymet.ornl.go/singlepixel.html]. [3] Wei Y., et al. 2014. Daymet: Thematic Real-time Environmental Data Services. Available on-line [http://daymet.ornl.gov/thredds_tiles.html].

  11. Continuous Severe Plastic Deformation Processing of Aluminum Alloys

    SciTech Connect (OSTI)

    Raghavan Srinivasan (PI); Prabir K. Chaudhury; Balakrishna Cherukuri; Qingyou Han; David Swenson; Percy Gros

    2006-06-30T23:59:59.000Z

    Metals with grain sizes smaller than 1-micrometer have received much attention in the past decade. These materials have been classified as ultra fine grain (UFG) materials (grain sizes in the range of 100 to 1000-nm) and nano-materials (grain size <100-nm) depending on the grain size. This report addresses the production of bulk UFG metals through the use of severe plastic deformation processing, and their subsequent use as stock material for further thermomechanical processing, such as forging. A number of severe plastic deformation (SPD) methods for producing bulk UFG metals have been developed since the early 1990s. The most promising of these processes for producing large size stock that is suitable for forging is the equal channel angular extrusion or pressing (ECAE/P) process. This process involves introducing large shear strain in the work-piece by pushing it through a die that consists of two channels with the same cross-sectional shape that meet at an angle to each other. Since the cross-sections of the two channels are the same, the extruded product can be re-inserted into the entrance channel and pushed again through the die. Repeated extrusion through the ECAE/P die accumulates sufficient strain to breakdown the microstructure and produce ultra fine grain size. It is well known that metals with very fine grain sizes (< 10-micrometer) have higher strain rate sensitivity and greater elongation to failure at elevated temperature, exhibiting superplastic behavior. However, this superplastic behavior is usually manifest at high temperature (> half the melting temperature on the absolute scale) and very low strain rates (< 0.0001/s). UFG metals have been shown to exhibit superplastic characteristics at lower temperature and higher strain rates, making this phenomenon more practical for manufacturing. This enables part unitization and forging more complex and net shape parts. Laboratory studies have shown that this is particularly true for UFG metals produced by SPD techniques. This combination of properties makes UFG metals produced by SPD very attractive as machining, forging or extrusion stock, both from the point of view of formability as well as energy and cost saving. However, prior to this work there had been no attempt to transfer these potential benefits observed in the laboratory scale to industrial shop floor. The primary reason for this was that the laboratory scale studies had been conducted to develop a scientific understanding of the processes that result in grain refinement during SPD. Samples that had been prepared in the laboratory scale were typically only about 10-mm diameter and 50-mm long (about 0.5-inch diameter and 2-inches long). The thrust of this project was three-fold: (i) to show that the ECAE/P process can be scaled up to produce long samples, i.e., a continuous severe plastic deformation (CSPD) process, (ii) show the process can be scaled up to produce large cross section samples that could be used as forging stock, and (iii) use the large cross-section samples to produce industrial size forgings and demonstrate the potential energy and cost savings that can be realized if SPD processed stock is adopted by the forging industry. Aluminum alloy AA-6061 was chosen to demonstrate the feasibility of the approach used. The CSPD process developed using the principles of chamber-less extrusion and drawing, and was demonstrated using rolling and wire drawing equipment that was available at Oak Ridge National Laboratory. In a parallel effort, ECAE/P dies were developed for producing 100-mm square cross section SPD billets for subsequent forging. This work was carried out at Intercontinental Manufacturing Co. (IMCO), Garland TX. Forging studies conducted with the ECAE/P billets showed that many of the potential benefits of using UFG material can be realized. In particular, the material yield can be increased, and the amount of material that is lost as scrap can be reduced by as much as 50%. Forging temperatures can also be reduced by over 150şC, resulting in energy savings in the ope

  12. Data Analysis

    SciTech Connect (OSTI)

    Powell, Danny H [ORNL] [ORNL; Elwood Jr, Robert H [ORNL] [ORNL

    2011-01-01T23:59:59.000Z

    Analysis of the material protection, control, and accountability (MPC&A) system is necessary to understand the limits and vulnerabilities of the system to internal threats. A self-appraisal helps the facility be prepared to respond to internal threats and reduce the risk of theft or diversion of nuclear material. The material control and accountability (MC&A) system effectiveness tool (MSET) fault tree was developed to depict the failure of the MPC&A system as a result of poor practices and random failures in the MC&A system. It can also be employed as a basis for assessing deliberate threats against a facility. MSET uses fault tree analysis, which is a top-down approach to examining system failure. The analysis starts with identifying a potential undesirable event called a 'top event' and then determining the ways it can occur (e.g., 'Fail To Maintain Nuclear Materials Under The Purview Of The MC&A System'). The analysis proceeds by determining how the top event can be caused by individual or combined lower level faults or failures. These faults, which are the causes of the top event, are 'connected' through logic gates. The MSET model uses AND-gates and OR-gates and propagates the effect of event failure using Boolean algebra. To enable the fault tree analysis calculations, the basic events in the fault tree are populated with probability risk values derived by conversion of questionnaire data to numeric values. The basic events are treated as independent variables. This assumption affects the Boolean algebraic calculations used to calculate results. All the necessary calculations are built into the fault tree codes, but it is often useful to estimate the probabilities manually as a check on code functioning. The probability of failure of a given basic event is the probability that the basic event primary question fails to meet the performance metric for that question. The failure probability is related to how well the facility performs the task identified in that basic event over time (not just one performance or exercise). Fault tree calculations provide a failure probability for the top event in the fault tree. The basic fault tree calculations establish a baseline relative risk value for the system. This probability depicts relative risk, not absolute risk. Subsequent calculations are made to evaluate the change in relative risk that would occur if system performance is improved or degraded. During the development effort of MSET, the fault tree analysis program used was SAPHIRE. SAPHIRE is an acronym for 'Systems Analysis Programs for Hands-on Integrated Reliability Evaluations.' Version 1 of the SAPHIRE code was sponsored by the Nuclear Regulatory Commission in 1987 as an innovative way to draw, edit, and analyze graphical fault trees primarily for safe operation of nuclear power reactors. When the fault tree calculations are performed, the fault tree analysis program will produce several reports that can be used to analyze the MPC&A system. SAPHIRE produces reports showing risk importance factors for all basic events in the operational MC&A system. The risk importance information is used to examine the potential impacts when performance of certain basic events increases or decreases. The initial results produced by the SAPHIRE program are considered relative risk values. None of the results can be interpreted as absolute risk values since the basic event probability values represent estimates of risk associated with the performance of MPC&A tasks throughout the material balance area (MBA). The RRR for a basic event represents the decrease in total system risk that would result from improvement of that one event to a perfect performance level. Improvement of the basic event with the greatest RRR value produces a greater decrease in total system risk than improvement of any other basic event. Basic events with the greatest potential for system risk reduction are assigned performance improvement values, and new fault tree calculations show the improvement in total system risk. The ope

  13. Experimental Measurement of the Flow Field of Heavy Trucks

    SciTech Connect (OSTI)

    Fred Browand; Charles Radovich

    2005-05-31T23:59:59.000Z

    Flat flaps that enclose the trailer base on the sides and top are known to reduce truck drag and reduce fuel consumption. Such flapped-truck geometries have been studied in laboratory wind tunnels and in field tests. A recent review of wind tunnel data for a variety of truck geometries and flow Reynolds numbers show roughly similar values of peak drag reduction, but differ in the determination of the optimum flap angle. Optimum angles lie in the range 12 degrees-20 degrees, and may be sensitive to Reynolds number and truck geometry. The present field test is undertaken to provide additional estimates of the magnitude of the savings to be expected on a typical truck for five flap angles 10, 13, 16, 19, and 22 degrees. The flaps are constructed from a fiberglass-epoxy-matrix material and are one-quarter of the base width in length (about 61 cm, or 2 feet). They are attached along the rear door hinge lines on either side of the trailer, so that no gap appears at the joint between the flap and the side of the trailer The flap angle is adjusted by means of two aluminum supports. The present test is performed on the NASA Crows Landing Flight Facility at the northern end of the San Joaquin valley in California. The main runway is approximately 2400 meters in length, and is aligned approximately in a north-south direction The test procedure is to make a series of runs starting at either end of the runway. All runs are initiated under computer control to accelerate the truck to a target speed of 60 mph (96 6 km/hr), to proceed at the target speed for a fixed distance, and to decelerate at the far end of the runway. During a run, the broadcast fuel rate, the engine rpm, forward speed, elapsed time--as well as several other parameters (10 in all)--are digitized at a rate of 100 digitizations per second. Various flapped-conditions are interspersed with the ''no flaps'' control, and are sequenced in a different order on different days. Approximately 310 runs are accumulated over the 5-day test period, May 17-21, 2004. The runway slopes rather uniformly upward from north-to-south. Over the distance of 2424 meters between our two ''start'' markers at either end of the runway, the net change in elevation is a little over ten meters. Test results clearly show the greater fuel consumption required to lift the truck against gravity in the southbound direction For this reason, it is important that the tests be averaged over a round trip circuit--that is, a run in both directions over the identical portion of the roadway. Northbound-southbound averages require an overlap segment of the runway (near the middle of the runway) where the truck--starting from either end--has achieved its target speed. For the target truck speed of 60 mph, this overlap region is approximately 700 meters in length. Typically a run and the return run are accomplished within a time interval of 6 minutes. Analysis of the data show fuel consumption savings at all flap angle settings tested, when compared to the ''no flaps'' condition. The most beneficial flap angle appears to be 13 degrees, for which the fuel consumption is 0.3778 {+-} 0.0025 liters/km compared to the ''no flaps'' control of 0.3941 {+-} 0.0034 liters/km. The error bounds expressed above mark the 99% confidence interval in the mean values given. That is, additional estimates of the mean fuel consumption would be expected to lie within the bounds given, approximately 99% of the time. The fuel consumption saving is--to reasonable accuracy--about 1.63 liters/100 kilometers. These savings represent the increment associated only with the change in drag due to the presence or absence of flaps. The result will hold for any truck of similar size and shape and engine performance regardless of the loading of the truck or the rolling resistance. The economy achieved by use of base flaps can be compared to the economy resulting from driving two trucks in a tandem configuration. In December 2003, such fuel consumption tests were performed at the same Crows Landing testsite. In the tests, two identical trucks are ope