National Library of Energy BETA

Sample records for andrew slaughter shell

  1. Bedload abrasion and the in situ fragmentation of bivalve shells ANDREW J. NEWELL*, DAVID J. GOWER , MICHAEL J. BENTON and VALENTIN

    E-Print Network [OSTI]

    Benton, Michael

    fragment within the channel of the Sakmara River (southern Urals, Russia). The Sakmara River has in the channel of the Sakmara River in the southern Urals, Russia (Fig. 1). There have been few previous studies, Astrakhanskaya, Saratov 410075, Russia ABSTRACT The aim of this study was to determine how Unio bivalve shells

  2. Andrew Lake

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications TraditionalWith PropaneNaturalTestAn EvolutionaryAndrew Gorton

  3. Andrew Weaver

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications TraditionalWith PropaneNaturalTestAn EvolutionaryAndrew

  4. Friends of St Andrews University Library

    E-Print Network [OSTI]

    Brierley, Andrew

    Friends of St Andrews University Library www.st-andrews.ac.uk/library/friends Designed and printed Andrews Library Special Collections Department. The University of St Andrews is a charity registered in Scotland : No SC013532 #12;The Friends of St Andrews University Library was founded in 2007 with the aim of

  5. Prior distribution Andrew Gelman

    E-Print Network [OSTI]

    Gelman, Andrew

    Prior distribution Andrew Gelman Volume 3, pp 1634­1637 in Encyclopedia of Environmetrics (ISBN, 2002 #12;Prior distribution The prior distribution is a key part of Bayesian infer- ence (see Bayesian with the probability distribution of new data to yield the posterior distribution, which in turn is used for future

  6. The Alliance Andrew Ahrenstein

    E-Print Network [OSTI]

    Walter, Frederick M.

    The Alliance by Andrew Ahrenstein Prologue Go to any planet with mildly intelligent life in the universe and ask, "Who is the most powerful?". The answer is always the same, the Alliance. Although of as an ambassador. The Alliance has decided to hold a test these past few cycles. After a month's training on board

  7. Coiled tubing sidetrack: Slaughter Field case history

    SciTech Connect (OSTI)

    Hightower, C.M.; Blount, C.G.; Ward, S.L.; Martin, R.F.; Cantwell, D.L.; Ackers, M.J.

    1995-03-01

    The paper describes the successful sidetrack of an oil well in the Slaughter Field in West Texas using coiled tubing (CT). Several first-time CT operations performed during this workover include: setting a whipstock in casing on CT; cutting a window with CT; using mud pulse measurement-while-drilling (MWD) with CT in a real well; use of a fluid-operated orientation tool for in-hole toolface changes; successful use of an autodriller to maintain weight on bit while drilling. Directional control of the sidetracked hole proved to be ineffective due to a surface software problem. The resultant wellbore was not horizontal as planned, but instead closely paralleled the original well for much of its length. However, the previously non-productive well flowed 1,000 barrels of fluid per day (BFPD) from the sidetrack following the workover.

  8. Finance Committee Andrew Trexler `14

    E-Print Network [OSTI]

    Royer, Dana

    Finance Committee Andrew Trexler `14 The Finance Committee elected trustee John Frank as the Vice. The resolutions were the following: Phase V of the comprehensive energy conservation projects, the installation

  9. WINTER 2012 ANDREW YOUNG SCHOOL

    E-Print Network [OSTI]

    Frantz, Kyle J.

    of the Dean publishes The Briefing three times a year for alumni, friends, faculty and staff of the Andrew Walker Dean Robert E. Moore Associate Dean Cynthia Searcy Assistant Dean for Academic Programs Avani

  10. Roadmapping Power Andrew B. Kahng

    E-Print Network [OSTI]

    Kahng, Andrew B.

    Roadmapping Power Andrew B. Kahng University of California, San Diego IN THEIR PUREST form, technology roadmaps give ``precompetitive'' statements of future technical requirements and challenges. To give the flavor of the technology roadmapping task, consider the question: ``What signaling styles

  11. A regional analysis of U.S. utility slaughter cows prices 

    E-Print Network [OSTI]

    Rogers, Toby Gale

    1996-01-01

    This study investigated the effects of Utility slaughter cow supply, lagged prices, per capita disposable personal income, prime interest rates, price of wholesale Utility beef, seasonality and yearly effects on the price of Utility slaughter cows...

  12. THE UNIVERSITY LIBRARY Andrew Abbott

    E-Print Network [OSTI]

    He, Chuan

    THE UNIVERSITY LIBRARY Andrew Abbott May 2006 I Preface II Origins of the Task Force III Trends of Regenstein Usage C. Local Views and Issues V Regenstein Library - Recent Trends and Patterns A. Faculty Usage and Technology C. Trends D. Recommendations VII Summary Appendix A. Detailed Analysis of Library Usage I Preface

  13. Statement from DOE's Chief Spokesperson Andrew Beck Regarding...

    Energy Savers [EERE]

    Statement from DOE's Chief Spokesperson Andrew Beck Regarding Delivery of SPR Oil to Marathon Petroleum Company Statement from DOE's Chief Spokesperson Andrew Beck Regarding...

  14. GALPROP Explanatory Supplement Andrew W. Strong

    E-Print Network [OSTI]

    Strong, Andrew W.

    GALPROP Explanatory Supplement Andrew W. Strong Max-Planck-Institut f¨ur extraterrestrische Physik Supplement . . . . . . . . . . . . . . . . . . . . . . . 5 2 General Principles 5 2.1 Transport equation

  15. Music in St Andrews JanuaryJune 2015

    E-Print Network [OSTI]

    Brierley, Andrew

    Music in St Andrews January­June 2015 www.st-andrews.ac.uk/music #12;Introduction Welcome to the second issue of Music in St Andrews: we know from the positive feedback to last semester's season brochure that many of you have enjoyed having the wide range of musical events taking place in St Andrews

  16. NREL: Energy Analysis - Andrew Weekley

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on771/6/14 Contact:NewsWebmasterWorking With Us NRELAhmadAndrew

  17. Evaluation of Salmonella disinfection strategies for pre-slaughter broiler crop decontamination 

    E-Print Network [OSTI]

    Barnhart, Eric Thomas

    1998-01-01

    The purpose of the following studies was to evaluate selected potential decontamination methods for ability to reduce the incidence of Salmonella recovery from broiler crops during pre-slaughter feed withdrawal. The efficacy of prolonged lactose...

  18. Deep cuts in household greenhouse gas emissions Andrew Blakers

    E-Print Network [OSTI]

    Deep cuts in household greenhouse gas emissions Andrew Blakers Director, Centre for Sustainable Energy Systems Australian National University Ph 61 2 6125 5905 Andrew.blakers@anu.edu.au Web: http

  19. Ph.D. Thesis University of St Andrews

    E-Print Network [OSTI]

    St Andrews, University of

    Ph.D. Thesis University of St Andrews Classification and Enumeration of Finite Semigroups Andreas Distler St Andrews, May 2010 #12;#12;Declarations I, Andreas Distler, hereby certify that this thesis in the University of St Andrews and that the candidate is qualified to submit this thesis in application

  20. University of St Andrews Centre for Film Studies

    E-Print Network [OSTI]

    Brierley, Andrew

    1 University of St Andrews Centre for Film Studies Report on Activities during 2009/2010 academic. Other/KT 9. Forthcoming 10. Appendices Appendix 1. Vive Le Cinéma Français! The St Andrews French Film Festival Appendix 2. Africa in Motion Film Festival ­ St Andrews Appendix 3. Seminar Series, 2009/10. 2009

  1. Andrew Gorton | Inventors | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications TraditionalWith PropaneNaturalTestAn EvolutionaryAndrew Gorton Andrew

  2. Andrew P Zwicker | Princeton Plasma Physics Lab

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications TraditionalWith PropaneNaturalTestAn EvolutionaryAndrew GortonAndrew P

  3. Andrew Shreve | Photosynthetic Antenna Research Center

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications TraditionalWith PropaneNaturalTestAn EvolutionaryAndrew GortonAndrew

  4. SEQUENTIAL DEEP BELIEF NETWORKS Galen Andrew

    E-Print Network [OSTI]

    Noble, William Stafford

    SEQUENTIAL DEEP BELIEF NETWORKS Galen Andrew University of Washington Department of Computer bilmes@ee.washington.edu ABSTRACT Previous work applying Deep Belief Networks (DBNs) to problems sequential information in the hidden layers. Index Terms-- deep learning, deep belief network, phone recog

  5. Reinforcement Learning in Robotics: J. Andrew Bagnell

    E-Print Network [OSTI]

    Reinforcement Learning in Robotics: A Survey Jens Kober J. Andrew Bagnell Jan Peters§¶ email to robotics a framework and set of tools for the design of sophisticated and hard-to-engineer behaviors. Conversely, the challenges of robotic problems provide both inspiration, impact, and valida- tion

  6. Pipelined Asynchronous Circuits Andrew Matthew Lines

    E-Print Network [OSTI]

    Pipelined Asynchronous Circuits Andrew Matthew Lines June 1995, revised June 1998 This thesis building blocks for highly pipelined designs. The first chapter presents the implementation approach for individual cells. The second chapter in­ vestigates the time behavior of complex pipelined circuits

  7. Exporting Spatial Externalities Andrew J. Cassey

    E-Print Network [OSTI]

    Keywords: agglomeration, exports, distance, spatial econometrics,Russia Cassey: cassey@wsu.edu; 101 HulbertExporting Spatial Externalities Andrew J. Cassey School of Economic Sciences Washington State of externalities generated by neighbors' ex- ports on place-level exports, explicitly modeling the distance

  8. Marr's vision: 25 years on Andrew Glennerster

    E-Print Network [OSTI]

    Glennerster, Andrew

    Marr's vision: 25 years on Andrew Glennerster It is 25 years since the posthumous publication of David Marr's book on Vision [1]. Only 35 years old when he died, Marr had already dramatically that "Even if no single one of Marr's detailed hypotheses ultimately survives...[his] lifework will have been

  9. SPRING/SUMMER 2012 ANDREW YOUNG SCHOOL

    E-Print Network [OSTI]

    Frantz, Kyle J.

    for supporting our students. Another is the new university-wide Honors College. Assistant Dean Cynthia Searcy has three times a year for alumni, friends, faculty and staff of the AndrewYoung School of Policy Studies Cynthia Searcy Assistant Dean for Academic Programs Avani Raval Promotion, Events, Facilities & Safety

  10. By Eric M. Lowitt, Andrew J. Hoffman,

    E-Print Network [OSTI]

    Hoffman, Andrew J.

    sustainability practices across the organization translates into critical performance benefits such as revenue high performance because of, not despite, their attention to sustainability. This is as true in badBy Eric M. Lowitt, Andrew J. Hoffman, Judith Walls and Anna M. Caffrey Sustainability and its

  11. Providing Security With Insecure Systems Andrew Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    not caused by cyber­in­security. Even taking the crash into account, the world economy has been doing veryProviding Security With Insecure Systems Andrew Odlyzko School of Mathematics, University: Security, Economics, Human Factors Extended Abstract A Martian who arrived on Earth today would surely con

  12. The ACM Java Libraries Andrew Mertz

    E-Print Network [OSTI]

    Van Cleave, Nancy K.

    The ACM Java Libraries Andrew Mertz William Slough Nancy Van Cleave Mathematics and Computer;Introduction NetBeans and Java The ACM Java Task Force (JTF) Libraries Placing applets on web pages How to learn about the ACM libraries: This workshop Textbooks ACM Java Task Force Tutorial Javadoc

  13. Deniable Internet Key Exchange Andrew C. Yao

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Deniable Internet Key Exchange Andrew C. Yao Frances F. Yao Yunlei Zhao§ Bin Zhu¶ Abstract In this work, we develop a family of protocols for deniable Internet Key-Exchange (IKE) with the following of privacy protection (especially for E-commerce over Internet), this work is naturally of practical interest

  14. UNIVERSITY OF ST ANDREWS EMAIL POLICY

    E-Print Network [OSTI]

    Brierley, Andrew

    UNIVERSITY OF ST ANDREWS EMAIL POLICY November 2005 I Introduction 1. Email is an important method of this policy is to describe the acceptable use of the University's email and related services, systems and facilities. 2. The document covers: Status of the Policy Scope of the Policy Responsibilities Monitoring

  15. Web History and Economics Andrew Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    Web History and Economics Andrew Odlyzko School of Mathematics University of Minnesota Minneapolis Abstract. In retrospect, the Web appears a very natural development, a byprod- uct of the growth of the information and communication technologies (ICT) sector. Still, the success of the Web was actually attained

  16. Jets in Particle Colliders Andrew Wong!

    E-Print Network [OSTI]

    Budker, Dmitry

    Jets in Particle Colliders Andrew Wong! #12;Topics · What are jets? · How are they produced? · What do we use to study jets? #12;What are jets? · Bunch of different jets #12;Pretty picture! #12;What's in a jet? · Hadrons ­ Kaons, Pions, Protons, Neutrons · Leptons ­ Mainly electrons and muons · These have

  17. Rachel Andrews Georgia Institute of Technology

    E-Print Network [OSTI]

    Rachel Andrews Georgia Institute of Technology Oscar Franzese Energy & Transportation Science) are roller dynamometers currently used to measure CMV brake efficiency. During a PBBT test, the CMV driver. Acknowledgements: Gary Capps, Mary Beth Lascurain Energy & Transportation Science Division Zane Pannell Pellissippi

  18. OverviewOverviewOverview HURRICANE ANDREWHURRICANE ANDREW

    E-Print Network [OSTI]

    Chen, Shu-Ching

    OverviewOverviewOverview 19962012 Overview 19962012 #12;HURRICANE ANDREWHURRICANE ANDREW #12. #12;International Hurricane Research CenterInternational Hurricane Research Center A Research AgendaA Research Agenda Aimed at MitigatingAimed at Mitigating Hurricane HazardsHurricane Hazards #12;HAZARDS

  19. Hydraulic Drivetrain and Regenerative Braking Team 13: Andrew Brown, Karan Desai, Andrew McGrath, Hurst Nuckols, Grant Wilson Adviser: Dr. Andrew Jackson

    E-Print Network [OSTI]

    Carpick, Robert W.

    Hydraulic Drivetrain and Regenerative Braking Team 13: Andrew Brown, Karan Desai, Andrew Mc Pressure Reservior Filter Variable Vane Pump Motor/Pump Hydraulic Accumulators Solenoid Valve Relief Valve Suction Line Since their development in 2006, hydraulic drivetrain systems have gained considerable

  20. Effects of feeding chopped hay with supplemental concentrate on the performance of slaughter ostrichs 

    E-Print Network [OSTI]

    Baltmanis, Beth Ann

    1996-01-01

    .2%). The ostriches in the experimental treatment were fed a coastal bertnudagrass and alfalfa hay mixture with a concentrate supplement (crude fiber> 1 4%). The control ostriches (I 13.2 kg) reached slaughter weight (1 13 kg) faster (P < 0.05) and at a younger age...

  1. Statement from DOE's Chief Spokesperson Andrew Beck Regarding...

    Energy Savers [EERE]

    Delivery of Strategic Petroleum Reserve Oil Statement from DOE's Chief Spokesperson Andrew Beck Regarding Delivery of Strategic Petroleum Reserve Oil September 14, 2008 - 3:43pm...

  2. Statement from DOE's Chief Spokesperson Andrew Beck Regarding...

    Energy Savers [EERE]

    Citgo's Request for Oil from the Strategic Petroleum Reserve Statement from DOE's Chief Spokesperson Andrew Beck Regarding Citgo's Request for Oil from the Strategic Petroleum...

  3. Statement from DOE's Chief Spokesperson Andrew Beck Regarding...

    Energy Savers [EERE]

    Strategic Petroleum Reserve Oil Deliveries Statement from DOE's Chief Spokesperson Andrew Beck Regarding Strategic Petroleum Reserve Oil Deliveries September 11, 2008 - 3:20pm...

  4. VBH-0071- In the Matter of Raymond Gallegos; Andrew Sanchez

    Broader source: Energy.gov [DOE]

    This Initial Agency Decision concerns a whistleblower complaint filed by Raymond Gallegos and Andrew Sanchez (the Complainants) against their previous employer, Business Environments (BE), under...

  5. VBH-0070- In the Matter of Raymond Gallegos; Andrew Sanchez

    Broader source: Energy.gov [DOE]

    This Initial Agency Decision concerns a whistleblower complaint filed by Raymond Gallegos and Andrew Sanchez (the Complainants) against their previous employer, Business Environments (BE), under...

  6. antagonist Manglik, Aashish; Kruse, Andrew C.; Kobilka, Tong...

    Office of Scientific and Technical Information (OSTI)

    bound to a morphinan antagonist Manglik, Aashish; Kruse, Andrew C.; Kobilka, Tong Sun; Thian, Foon Sun; Mathiesen, Jesper M.; Sunahara, Roger K.; Pardo, Leonardo; Weis,...

  7. Internship experience at Lockwood, Andrews & Newnam, Inc. 

    E-Print Network [OSTI]

    Bolander, Jeffery Noel, 1960-

    2013-03-13

    of Engineering December 1988 ABSTRACT Internship Experience at Lockwood, Andrews & Newnam, Inc. (Dec. 1988) Jeffery N. Bolander, B.S. Texas A&M University M.Eng. Texas A&M University Chairman of Advisory Committee: William D. Turner, Ph.D. A one year... ......................... 82 APPENDIX B - PROGRESS REPORTS ............................ 8 9 APPENDIX C - THERMAL PIPE STRESS COMPUTER PROGRAM ...... 98 VITA ........................................................ 141 ii 15 28 29 31 37 39 40 44 49 56 66 LIST...

  8. Centre for Film Studies University of St Andrews

    E-Print Network [OSTI]

    Brierley, Andrew

    #12;Centre for Film Studies University of St Andrews #12;#12;1 Cine-Files, Spring 2015 Cine-Files VOL. 1, 2015 Contents Editorial by Leshu Torchin Bringing Film Culture to St Andrews 4 Film Studies Kawamoto CrossingContinentsinFilmStudies Robert Burgoyne Sojourn in Brazil Dennis Hanlon In Search

  9. University of St. Andrews Discussion papers in Environmental Economics

    E-Print Network [OSTI]

    Brierley, Andrew

    University of St. Andrews Discussion papers in Environmental Economics http://www.st-andrews.ac.uk/gsd/research/envecon/eediscus/ Paper 2015-13 Economic Impact of the Irish revolution Eoin McLaughlin Keywords: Irish economic history, revolution, partition JEL codes: N14, N44 #12;1 Economic impact of the Irish revolution Eoin Mc

  10. UNIVERSITY OF ST ANDREWS SCHOOL OF PHYSICS AND ASTRONOMY

    E-Print Network [OSTI]

    Greenaway, Alan

    UNIVERSITY OF ST ANDREWS SCHOOL OF PHYSICS AND ASTRONOMY Guidance notes for potential exchange and study abroad students The School of Physics and Astronomy is pleased to welcome exchange and study information is available online from the School:- Sub-honours modules (year 1 and 2) http://www.st-andrews.ac.uk/physics

  11. Irvine Building, North Street, St Andrews, Fife KY16 9AL, Scotland, UK

    E-Print Network [OSTI]

    Brierley, Andrew

    -mail: geoinformatics@st-andrews.ac.uk Website: www.st-andrews.ac.uk/geoinformatics PUTTING FIFE AT THE FOREFRONT OF GPS through the Centre for GeoInformatics within the University of St Andrews. Our university website is given the online form on the following website: http://www.st-andrews.ac.uk/geoinformatics/gps or contact us

  12. Andrew Ells | Photosynthetic Antenna Research Center

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L O O D S TAPropaneandAn3 TableAnderson-CookElls Andrew Ells

  13. Manicouagan trips by Andrew S. Nuquist Excerpts of emails from Andrew S. Nuquist (Vermont) to Rob Rutten (Netherlands) in April 2011, answe-

    E-Print Network [OSTI]

    Rutten, Rob

    Manicouagan trips by Andrew S. Nuquist Excerpts of emails from Andrew S. Nuquist (Vermont) to Rob I gave to the University of Vermont Geology Department. They wished I had gotten closer

  14. Hollow spherical shell manufacture

    DOE Patents [OSTI]

    O'Holleran, T.P.

    1991-11-26

    A process is disclosed for making a hollow spherical shell of silicate glass composition in which an aqueous suspension of silicate glass particles and an immiscible liquid blowing agent is placed within the hollow spherical cavity of a porous mold. The mold is spun to reduce effective gravity to zero and to center the blowing agent, while being heated so as to vaporize the immiscible liquid and urge the water carrier of the aqueous suspension to migrate into the body of the mold, leaving a green shell compact deposited around the mold cavity. The green shell compact is then removed from the cavity, and is sintered for a time and a temperature sufficient to form a silicate glass shell of substantially homogeneous composition and uniform geometry. 3 figures.

  15. Hollow spherical shell manufacture

    DOE Patents [OSTI]

    O'Holleran, Thomas P. (Belleville, MI)

    1991-01-01

    A process for making a hollow spherical shell of silicate glass composition in which an aqueous suspension of silicate glass particles and an immiscible liquid blowing agent is placed within the hollow spherical cavity of a porous mold. The mold is spun to reduce effective gravity to zero and to center the blowing agent, while being heated so as to vaporize the immiscible liquid and urge the water carrier of the aqueous suspension to migrate into the body of the mold, leaving a green shell compact deposited around the mold cavity. The green shell compact is then removed from the cavity, and is sintered for a time and a temperature sufficient to form a silicate glass shell of substantially homogeneous composition and uniform geometry.

  16. Sustainable Developmentwww.st-andrews.ac.uk/sasi

    E-Print Network [OSTI]

    Brierley, Andrew

    108 Sustainable Developmentwww.st-andrews.ac.uk/sasi Sustainable Development Degree options MSc (One Year) Coursework & 15,000-word Dissertation Sustainable Development MSc (Two Years) Coursework Sustainable Development Postgraduate Certificate (One Semester) Coursework Sustainable Development MRes (One

  17. Regression: What's it all about?1 Andrew Gelman2

    E-Print Network [OSTI]

    Gelman, Andrew

    Regression: What's it all about?1 Andrew Gelman2 5 Jan 2015 Regression plays three different roles in applied statistics: 1. A specification the different faces of regression modeling after being asked to review the new book

  18. A BALANCED DIPLOMACY TOURNAMENT ANDREW ASH, J. MARSHALL ASH

    E-Print Network [OSTI]

    Ash, J. Marshall

    A BALANCED DIPLOMACY TOURNAMENT ANDREW ASH, J. MARSHALL ASH , TIMOTHY L. MCMURRY, AND BRIDGETPaul University Faculty Summer Research Grants. 1 #12;2 A. ASH, J. M. ASH, T. L. MCMURRY, AND B. E. TENNER

  19. Beyond subjective and objective in statistics Andrew Gelman Christian Hennig

    E-Print Network [OSTI]

    Gelman, Andrew

    Beyond subjective and objective in statistics Andrew Gelman Christian Hennig 15 Feb 2015 Abstract We propose to abandon the words "objectivity" and "subjectivity" in statistics discourse and replace, consensus, impartiality, and correspondence to observable reality, and subjectivity replaced by awareness

  20. Slaughter and carcass characteristics of Santa Gertrudis steers produced by different management practices 

    E-Print Network [OSTI]

    Reddish, Robert Lee

    1956-01-01

    possible* The cooperation of Dr^ J* C* Miller, Professor J* K* Riggs, Dr* H* 0* Kunkel, Dr*. A. V* Moore, and the Santa Gertrudis breeders International is apprec? iated* The writer wishes to thank Mr* Hoy Simms for his help in slaughtering and cutting... theexperimental cattle, Mr. Harold Franke and Mr* H*. V. Reyes for feeding and caring for the experimental cattle, and Dr. M. J* Garber and Mr. R* L . Smith for their help with the statistical analyses. The work of Dr* Sylvia Cover in collection...

  1. Superhydrophobic and Oleophobic Fibers by Coaxial Electrospinning Daewoo Han and Andrew Steckl

    E-Print Network [OSTI]

    Cincinnati, University of

    Superhydrophobic and Oleophobic Fibers by Coaxial Electrospinning Daewoo Han and Andrew Steckl and Oleophobic Fibers by Coaxial Electrospinning Daewoo Han and Andrew J. Steckl* Nanoelectronics Laboratory- and microfluidic applications. In this work, we have investigated coaxial electrospinning to produce core

  2. Stability of charged thin shells

    SciTech Connect (OSTI)

    Eiroa, Ernesto F.; Simeone, Claudio

    2011-05-15

    In this article we study the mechanical stability of spherically symmetric thin shells with charge, in Einstein-Maxwell and Einstein-Born-Infeld theories. We analyze linearized perturbations preserving the symmetry, for shells around vacuum and shells surrounding noncharged black holes.

  3. Fish Slaughter, Killing, and Euthanasia: A Review of Major Published U.S. Guidance Documents and General

    E-Print Network [OSTI]

    Watson, Craig A.

    CIR1525 Fish Slaughter, Killing, and Euthanasia: A Review of Major Published U.S. Guidance of County Commissioners Cooperating. Millie Ferrer-Chancy, Interim Dean Introduction Fish are important. However, non-native fish illegally released into the environment pose a nuisance. In each case, death

  4. Effects of density and water availability on the behavior, physiology, and weight loss of slaughter horses during transport 

    E-Print Network [OSTI]

    Iacono, Christa Marie

    2007-04-25

    The aim of this study was to determine the effects of density and provision of water on behavior, stress, and weight loss in slaughter horses during transport. A 16.2-m long, single deck, semi-trailer was divided into three ...

  5. Andrews County, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAandAmminex A S Jump to: navigation,InofMill, Texas:AndrewAndrews County,

  6. Broadband proton-decoupled proton spectra Andrew J. Pell

    E-Print Network [OSTI]

    Keeler, James

    Broadband proton-decoupled proton spectra Andrew J. Pell , Richard A. E. Edden§ and James Keeler.ac.uk. #12;Abstract We present a new method for recording broadband proton-decoupled proton spectra with ab reduction in sensitivity when com- pared to a conventional proton spectrum. The method is demonstrated

  7. Distributed Operating Systems ANDREW S. TANENBAUM and ROBBERT VAN RENESSE

    E-Print Network [OSTI]

    Newhall, Tia

    Distributed Operating Systems ANDREW S. TANENBAUM and ROBBERT VAN RENESSE Department of Mathematics and Computer Science, Vrije Universiteit, Amsterdam, The Netherlands Distributed operating systems have many as an introduction to distributed operating systems, and especially to current university research about them. After

  8. Sensor Fault Detection in Power Plants Andrew Kusiak1

    E-Print Network [OSTI]

    Kusiak, Andrew

    Sensor Fault Detection in Power Plants Andrew Kusiak1 and Zhe Song2 Abstract: This paper presents models; Diagnosis; Combustion; Power plants; Probe instruments. Introduction Measurements in industrial and Soroush 2003 . Any false reading could lead to di- sastrous outcomes. In a coal-fired power plant, faulty

  9. WATER FLOW THROUGH TEMPERATE GLACIERS Andrew G. Fountain1

    E-Print Network [OSTI]

    Fountain, Andrew G.

    WATER FLOW THROUGH TEMPERATE GLACIERS Andrew G. Fountain1 Department of Geology Portland State, Washington Abstract. Understanding water movement through a glacier is fundamental to several critical issues glacierized drainage basins. To this end we have synthesized a conceptual model of water movement through

  10. MIT PEBBLE BED REACTOR PROJECT ANDREW C. KADAK

    E-Print Network [OSTI]

    , including the AP-600, the advanced boiling water reactor (ABWR) and the standard PWR designs offered of existing light water reactors and plans for evolutionary plants that were being considered at the timeMIT PEBBLE BED REACTOR PROJECT ANDREW C. KADAK Nuclear Science and Engineering Department

  11. Bimodal Active Stereo Vision Andrew Dankers1,2

    E-Print Network [OSTI]

    Barnes, Nick

    Introduction The National ICT Australia (NICTA) Autonomous Systems and Sensing Technologies (ASSeT) Smart Car;2 Andrew Dankers, Nick Barnes, and Alex Zelinsky 1.1 Research Platform Fig. 1. Research platform. Left: Smart Car, and CeDAR mounted behind the wind- screen (centre). Right: CeDAR, laboratory apparatus

  12. Advancement Volunteers LEHIGH UNIVERSITY 1 Andrew Aaron `09P

    E-Print Network [OSTI]

    Gilchrist, James F.

    Advancement Volunteers LEHIGH UNIVERSITY 1 Andrew Aaron `09P Jacalyn F. Aaron `78 `09P ++ Robert J-Grande `03 Christy L. Anderson `01 ++ N. Craig Anderson `60 `91P `F/S ++ Nicholas J. Anderson `10 Richard A. Anderson `03P Rodd N. Anderson `75 `77G `06P ++ Linny Andlinger `11P Merrick G. Andlinger `11P Jason Anhorn

  13. The Oil Searching Problem Andrew McGregor1

    E-Print Network [OSTI]

    McGregor, Andrew

    The Oil Searching Problem Andrew McGregor1 , Krzysztof Onak2 , and Rina Panigrahy3 1 University@mit.edu 3 Microsoft Research Silicon Valley. Email: rina@microsoft.com Abstract. Given n potential oil locations, where each has oil at a certain depth, we seek good trade-offs between the number of oil sources

  14. Data mining for Action Recognition Andrew Gilbert Richard Bowden

    E-Print Network [OSTI]

    Bowden, Richard

    Data mining for Action Recognition Andrew Gilbert Richard Bowden Centre for Vision Speech of the features used. This paper improves the performance of action recognition through two data mining techniques, APriori association rule mining and Contrast Set Mining. These tech- niques are ideally suited to action

  15. Linearisation of tautological control systems Andrew D. Lewis

    E-Print Network [OSTI]

    Lewis, Andrew D.

    Linearisation of tautological control systems Andrew D. Lewis 20/04/2015 Abstract The framework of tautological control systems is one where "control" in the usual sense has been eliminated, with the intention of overcoming the issue of feedback- invariance. Here, the linearisation of tautological control systems

  16. University of St Andrews Centre for Film Studies

    E-Print Network [OSTI]

    Brierley, Andrew

    ! "! ! University of St Andrews Centre for Film Studies Report on Activities during 2010 Rosenstone, History on Film/ Film On History. This event was soon followed by a new film festival initiative, the 60 Hour Film Blitz, of which another two editions are planned for the coming years. Thanks to a grant

  17. Avaki Data Grid Secure Transparent Access to Data Andrew Grimshaw

    E-Print Network [OSTI]

    Grimshaw, Andrew

    1 of 27 Avaki Data Grid ­ Secure Transparent Access to Data Andrew Grimshaw Mike Herrick Anand and development by the Grid community we see Grids (then called Metasystems [3]) being deployed around the world both in academic settings, and more tellingly, in production commercial settings. What is a Grid? What

  18. IS SOLAR SYSTEM STABLE? Vladik Kreinovich, Andrew Bernat

    E-Print Network [OSTI]

    Kreinovich, Vladik

    IS SOLAR SYSTEM STABLE? A REMARK Vladik Kreinovich, Andrew Bernat Computer Science Department, University of Texas at El Paso, El Paso, TX 79968, USA Abstract. It is not yet known (1994) whether the Solar System is stable or not. Common belief is that the Solar System is stable if and only

  19. JMatch: Java plus Pattern Matching Jed Liu Andrew C. Myers

    E-Print Network [OSTI]

    Keinan, Alon

    JMatch: Java plus Pattern Matching Jed Liu Andrew C. Myers Computer Science Department Cornell University Abstract The JMatch language extends Java with iterable abstract pattern matching, pattern matching that is compatible with the data abstraction features of Java and makes iteration ab­ stractions

  20. Internet growth: Myth and reality, use and abuse Andrew Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    Internet growth: Myth and reality, use and abuse Andrew Odlyzko AT&T Labs - Research amo@research.att.com http://www.research.att.com/ amo Abstract Actual Internet traffic growth rates of 100 percent per year to Internet growth claim astronomical rates of increase; the usual phrase is that "Internet traffic

  1. Internet pricing and the history of communications Andrew Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    Internet pricing and the history of communications Andrew Odlyzko AT&T Labs - Research amo, the telephone, and the Internet. In particular, the typical story for each service is that quality rises, prices. The historical analogies of this paper suggest that the Internet will evolve in a similar way, towards simplicity

  2. Internet traffic growth: Sources and implications Andrew M. Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    Internet traffic growth: Sources and implications Andrew M. Odlyzko University of Minnesota, Minneapolis, MN, USA ABSTRACT The high tech bubble was inflated by myths of astronomical Internet traffic growth rates. Yet although these myths were false, Internet traffic was increasing very rapidly, close

  3. Bounds on the Energy Consumption of Computational Andrew Gearhart

    E-Print Network [OSTI]

    California at Berkeley, University of

    in energy efficiency can significantly reduce operating costs. Such challenges have influenced re- search variety of machines. Motivated by the large and increas- ingly growing dominant cost (in time and energyBounds on the Energy Consumption of Computational Kernels Andrew Gearhart Electrical Engineering

  4. Deriving Displacement from a 3 axis Accelerometer Mr. Andrew Blake

    E-Print Network [OSTI]

    Winstanley, Graham

    Deriving Displacement from a 3 axis Accelerometer Mr. Andrew Blake University of Brighton CMIS, Additive 1. Introduction The Nintendo WiiTM, Sony's Playstation 3TM and Microsoft's Xbox 360TM all feature a 1000 seconds is 1,000,000 times greater than that at 1 second. Any small offset errors

  5. Availability Bars for Calendar Scheduling AbstractAndrew Faulring

    E-Print Network [OSTI]

    Myers, Brad A.

    Availability Bars for Calendar Scheduling AbstractAndrew Faulring Carnegie Mellon University 5000 meeting or to what extent an existing meeting can be rescheduled. This paper introduces the "availability. Availability bars, embedded in calendar applications, can help users who manually schedule meetings

  6. Andrew Weisberg DOE-Annual-030520-1 Hydrogen Storage

    E-Print Network [OSTI]

    Andrew Weisberg DOE-Annual-030520-1 Hydrogen Storage Using Lightweight Tanks DOE Hydrogen Program Myers, Gene Berry This work was performed under the auspices of the U.S. Department of Energy · Risk of `suppressed' failure modes with higher variance is neglected in current safety standards

  7. HSI Shell Script

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFESOpportunitiesNERSCGrid-based29 1.921HEPChargingHPX onShell Script

  8. Free Lunch: Exploiting Renewable Energy For Computing Sherif Akoush, Ripduman Sohan, Andrew Rice, Andrew W. Moore and Andy Hopper

    E-Print Network [OSTI]

    Cambridge, University of

    as an alternative energy source to fossil fuels in the hope of mitigating our ecolog- ical footprint [4 grid requires upgrading in order to collect, store and distribute this type of energy. Addition- allyFree Lunch: Exploiting Renewable Energy For Computing Sherif Akoush, Ripduman Sohan, Andrew Rice

  9. Free Lunch: Exploiting Renewable Energy For Computing Sherif Akoush, Ripduman Sohan, Andrew Rice, Andrew W. Moore and Andy Hopper

    E-Print Network [OSTI]

    Haddadi, Hamed

    Free Lunch: Exploiting Renewable Energy For Computing Sherif Akoush, Ripduman Sohan, Andrew Rice renewable en- ergy by (i) colocating datacentres with these remote energy sources, (ii) connecting them over that period. In anticipation of this growth, our industry is begin- ning to explore renewable energy

  10. Shell to shell energy transfer in magnetohydrodynamic dynamo simulations

    E-Print Network [OSTI]

    Pouquet, Annick

    Shell to shell energy transfer in magnetohydrodynamic dynamo simulations Pablo Mininni, Alexandros 80307 (Dated: May 5, 2005) We study the transfer of energy between different scales for forced three, and which scales of the magnetic field receive energy directly from the velocity field and which scales

  11. PART I The Making of a Geochemist: Q&A with Andrew Stack | ornl...

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

    discoveries Andrew Stack of Oak Ridge National Laboratory calls on his expertise in geology, chemistry and computing to advance understanding of the dynamics of minerals...

  12. Distinguishing Off-Shell Supergravities With On-Shell Physics

    E-Print Network [OSTI]

    Neil D. Lambert; Gregory W. Moore

    2005-10-04

    We show that it is possible to distinguish between different off-shell completions of supergravity at the on-shell level. We focus on the comparison of the ``new minimal'' formulation of off-shell four-dimensional N=1 supergravity with the ``old minimal'' formulation. We show that there are 3-manifolds which admit supersymmetric compactifications in the new-minimal formulation but which do not admit supersymmetric compactifications in other formulations. Moreover, on manifolds with boundary the new-minimal formulation admits ``singleton modes'' which are absent in other formulations.

  13. Biology/Marine Biology Prizes/Awards/Scholarships 2003/04 University Medal in Biology Andrew Gillis

    E-Print Network [OSTI]

    Gunawardena, Arunika

    Biology/Marine Biology Prizes/Awards/Scholarships 2003/04 University Medal in Biology Andrew Gillis University Medal in Marine Biology Kent Russell Hugh P. Bell Scholarships Andrew Gillis, Stephanie Wood

  14. Optimum rotationally symmetric shells for flywheel rotors

    DOE Patents [OSTI]

    Blake, Henry W. (Oak Ridge, TN)

    2000-01-01

    A flywheel rim support formed from two shell halves. Each of the shell halves has a disc connected to the central shaft. A first shell element connects to the disc at an interface. A second shell element connects to the first shell element. The second shell element has a plurality of meridional slits. A cylindrical shell element connects to the second shell element. The cylindrical shell element connects to the inner surface of the flywheel rim. A flywheel rim support having a disc connected an outer diameter of a shaft. Two optimally shaped shell elements connect to the optimally shaped disc at an interface. The interface defines a discontinuity in a meridional slope of said support. A cylindrical shell element connects to the two shell elements. The cylindrical shell element has an outer surface for connecting to the inner surface of the flywheel rim. A flywheel rim casing includes an annular shell connected to the central shaft. The annular shell connects to the flywheel rim. A composite shell surrounds the shaft, annular shell and flywheel rim.

  15. Stability of elastic grid shells

    E-Print Network [OSTI]

    Mesnil, Romain, M. Eng. Massachusetts Institute of Technology

    2013-01-01

    The elastic grid shell is a solution that combines double curvature and ease of mounting. This structural system, based on the deformation of an initially at grid without shear stiffness was invented more than fifty years ...

  16. Third-order gas-liquid phase transition and the nature of Andrews critical Tian Ma and Shouhong Wang

    E-Print Network [OSTI]

    Wang, Shouhong

    Third-order gas-liquid phase transition and the nature of Andrews critical point Tian Ma-order gas-liquid phase transition and the nature of Andrews critical point Tian Ma1 and Shouhong Wang2 1 is to study the nature of the Andrews critical point in the gas-liquid transition in a physical

  17. The Digital Library Shell Yael Dubinsky

    E-Print Network [OSTI]

    Yehudai, Amiram

    repositories DSpace Fedora #12;8 Agenda Digital Libraries The Digital Library (DL) Shell The project

  18. Car Parking Regulations_09.05.13_SGD University of St Andrews

    E-Print Network [OSTI]

    Brierley, Andrew

    Car Parking Regulations_09.05.13_SGD University of St Andrews Estates Car Parking Regulations Commencement and Citation These Regulations may be cited as the University of St Andrews Car Parking September in any year. 1. Car Parking Regulations 1.1 No person shall park a vehicle within a University

  19. Gunsch Jesse Andrew SR COE Spring 2009 Dean's List With Distinction

    E-Print Network [OSTI]

    Wong, Pak Kin

    , Anne E SR EHY Rainey, Joseph Daniel JR AEE Rheinheimer, Paul E SR CHE Richards, Robert G SR OSEGunsch Jesse Andrew SR COE Spring 2009 Dean's List With Distinction (Students enrolled at the UA Andrew JR AEE Cartee, Ryan Robert SR CHE Case, Lauren SR CVE Chu, Clayton Nguyen SR AEE Chu, Wesley

  20. Third-Order Gas-Liquid Phase Transition and the Nature of Andrews Critical Point

    E-Print Network [OSTI]

    Tian Ma; Shouhong Wang

    2010-07-13

    The main objective of this article is to study the nature of the Andrews critical point in the gas-liquid transition in a physical-vapor transport (PVT) system. A dynamical model, consistent with the van der Waals equation near the Andrews critical point, is derived. With this model, we deduce two physical parameters, which interact exactly at the Andrews critical point, and which dictate the dynamic transition behavior near the Andrews critical point. In particular, it is shown that 1) the Andrews critical point is a switching point where the phase transition changes from the first order to the third order, 2) the gas-liquid co-existence curve can be extended beyond the Andrews critical point, and 3) the liquid-gas phase transition going beyond Andrews point is of the third order. This clearly explains why it is hard to observe the gas-liquid phase transition beyond the Andrews critical point. Furthermore, the analysis leads naturally the introduction of a general asymmetry principle of fluctuations and the preferred transition mechanism for a thermodynamic system.

  1. Ph.D in Economics at the Andrew Young School, Georgia State University

    E-Print Network [OSTI]

    Frantz, Kyle J.

    Ph.D in Economics at the Andrew Young School, Georgia State University WHY Georgia State University's Department of Economics? We are part of one of America's best public affairs graduate schools: the Andrew in scholarly journals including Econometrica, American Economic Review, Journal of Political Economy, Quarterly

  2. Andrew Odlyzko 2006 32 Chapter 4: Economic costs of toll access

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    © Andrew Odlyzko 2006 32 Chapter 4: Economic costs of toll access Andrew Odlyzko Introduction Many. The invention of printing lowered the costs of information dissemination, and largely eliminated the job costs are higher than those of libraries, and it enables new types of scholarly communication (as well

  3. North Andrews Gardens, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History ViewMayo, Maryland:NPI VenturesNew Hampshire: EnergyReservoir |Solkraft AS JumpAndrews Gardens,

  4. Andrew County, Missouri: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAandAmminex A S Jump to: navigation,InofMill, Texas:Andrew County,

  5. 1999 Commercial Buildings Characteristics--Building Shell and...

    U.S. Energy Information Administration (EIA) Indexed Site

    & Practices > Building Shell & Lighting Conservation Features Building Shell and Lighting Conservation Features The 1999 CBECS collected information on two types of building shell...

  6. Shelling in low dimensional manifolds 

    E-Print Network [OSTI]

    Murray, William Owen

    1974-01-01

    SHELLING IN LOW DIMENSIONAL MANIFOLDS A Thesis by WILLIAM OWEN MURRAY IV Approved as to style and content by: (Chairman of Committee) c (Head of /g" 7 Department) (Member) (Memge May 1974 ABSTRACT Shelling in Low Dimensional Manifolds. (May... f*d~ f b. g of M is a finite collection of closed n-cells Cl, C2, n that S = U C and C and C have disjoint interiors for i i=1 C such n Now let M be an n-manifold with boundary. If h is an n-cell in The citations on the following pages follow...

  7. Birth to slaughter growth and carcass composition of Simmental-sired calves as influenced by birth season, pre-weaning stock rate, and sex 

    E-Print Network [OSTI]

    Garcia Estefan, Antonio

    1996-01-01

    of the stocker phase, cattle were transported to TAES-Amarillo for feedlot and slaughter. Fallborn calves from low stocking rates weaned heaviest (305 kg), and winter-born calves grazed at high stocking rates weaned lightest (216 kg) (P<.05). Respective...

  8. Prediction of Welding Distortion Panagiotis Michaleris and Andrew DeBiccari

    E-Print Network [OSTI]

    Michaleris, Panagiotis

    1 Prediction of Welding Distortion Panagiotis Michaleris and Andrew DeBiccari Edison Welding Institute Columbus, Ohio ABSTRACT. This paper presents a numerical analysis technique for predicting welding induced distortion. The technique combines two dimensional welding simulations with three dimensional

  9. Diver-based control of a tethered unmanned underwater vehicle Andrew Speers and Michael Jenkin

    E-Print Network [OSTI]

    Jenkin, Michael R. M.

    Diver-based control of a tethered unmanned underwater vehicle Andrew Speers and Michael Jenkin Computer Science and Engineering, York University, Toronto, Canada {speers,jenkin}@cse.yorku.ca Keywords

  10. Inducing Information Structures for Data-driven Text Analysis Andrew Salway

    E-Print Network [OSTI]

    Salway, Andrew

    N-5008 Bergen Norway andrew.salway@uni.no Samia Touileb University of Bergen N-5020 Bergen Norway samia.touileb@gmail.com Endre Tvinnereim Uni Research Rokkansenteret N-5015 Bergen Norway endre

  11. PURDUE UNIVERSITY ULTRAFAST OPTICS & OPTICAL FIBER COMMUNICATIONS LABORATORY Andrew M. Weiner and Ehsan Hamidi

    E-Print Network [OSTI]

    Purdue University

    PURDUE UNIVERSITY ULTRAFAST OPTICS & OPTICAL FIBER COMMUNICATIONS LABORATORY Andrew M. Weiner ULTRAFAST OPTICS & OPTICAL FIBER COMMUNICATIONS LABORATORY Ultrawideband (UWB) Radio-frequency Photonics UWB;PURDUE UNIVERSITY ULTRAFAST OPTICS & OPTICAL FIBER COMMUNICATIONS LABORATORY Femtosecond Pulse Shaping A

  12. Andrew Schwartz: Brain Control for Artificial Limbs -Businessweek How About Them Gams: 3D

    E-Print Network [OSTI]

    Schwartz, Andrew

    Andrew Schwartz: Brain Control for Artificial Limbs - Businessweek Related How About Them Gams: 3D Printing Custom Legs When Jan Scheuermann grasped a chocolate bar and raised it to her mouth last year

  13. Andrew K. Dunn, PhD Associate Professor of Biomedical Engineering

    E-Print Network [OSTI]

    Andrew K. Dunn, PhD Associate Professor of Biomedical Engineering University of Texas at Austin in electrical engineering from Northeastern University in 1994, and his PhD in biomedical engineering from UT

  14. CSP 550: Internet Programming Andrew Tanenbaum and M. Steen, Distributed Systems: Principles and Paradigms, 2002.

    E-Print Network [OSTI]

    Heller, Barbara

    CSP 550: Internet Programming Texts Andrew Tanenbaum and M. Steen, Distributed Systems: Principles and SOAP 9 hours Total 45 hours Edited March 2006 (html, css checks) CSP 550: Internet Programming - CS

  15. Turbine blade with spar and shell

    DOE Patents [OSTI]

    Davies, Daniel O. (Palm City, FL); Peterson, Ross H. (Loxahatchee, FL)

    2012-04-24

    A turbine blade with a spar and shell construction in which the spar and the shell are both secured within two platform halves. The spar and the shell each include outward extending ledges on the bottom ends that fit within grooves formed on the inner sides of the platform halves to secure the spar and the shell against radial movement when the two platform halves are joined. The shell is also secured to the spar by hooks extending from the shell that slide into grooves formed on the outer surface of the spar. The hooks form a serpentine flow cooling passage between the shell and the spar. The spar includes cooling holes on the lower end in the leading edge region to discharge cooling air supplied through the platform root and into the leading edge cooling channel.

  16. Local Search and Information Visualization Methods for School Redistricting Marie desJardins, Blazej Bulka, Ryan Carr, Andrew Hunt, Priyang Rathod, and Penny Rheingans

    E-Print Network [OSTI]

    Rheingans, Penny

    Jardins, Blazej Bulka, Ryan Carr, Andrew Hunt, Priyang Rathod, and Penny Rheingans Department of Computer ScienceJardins, Blazej Bulka, Ryan Carr, Andrew Hunt, Priyang Rathod, and Penny Rheingans Department of Computer Science

  17. Boson shells harboring charged black holes

    SciTech Connect (OSTI)

    Kleihaus, Burkhard; Kunz, Jutta; Laemmerzahl, Claus; List, Meike

    2010-11-15

    We consider boson shells in scalar electrodynamics coupled to Einstein gravity. The interior of the shells can be empty space, or harbor a black hole or a naked singularity. We analyze the properties of these types of solutions and determine their domains of existence. We investigate the energy conditions and present mass formulae for the composite black hole-boson shell systems. We demonstrate that these types of solutions violate black hole uniqueness.

  18. Shell boosts recovery at Kernridge

    SciTech Connect (OSTI)

    Moore, S.

    1984-01-01

    Since acquiring the Kernridge property in December 1979, Shell Oil Co. has drilled more than 1,800 wells and steadily increased production from 42,000 to 89,000 b/d of oil. Currently, the Kernridge Production Division of Shell California Production Inc. (SCPI), a newly formed subsidiary of Shell Oil Co., is operator for the property. The property covers approximately 35,000 mostly contiguous net acres, with production concentrated mainly on about 5,500 net acres. SCPI's four major fields in the area are the North and South Belridge, Lost Hills, and Antelope Hills. Most of the production comes from the North and South Belridge fields, which were previously held by the Belridge Oil Co. Productive horizons in the fields are the Tulare, Diatomite, Brown Shale, Antelope Shale, 64 Zone, and Agua sand. The Tulare and Diatomite are the two major reservoirs SCPI is developing. The Tulare, encountered between 400 and 1,300 ft, is made up of fine- to coarse-grained, unconsolidated sands with interbedded shales and silt stones and contains 13 /sup 0/ API oil. Using steam drive as the main recovery method, SCPI estimates an ultimate recovery from the Tulare formation of about 60% of the original 1 billion barrels in place. The Diatomite horizon, found between 800 and 3,500 ft and containing light, 28 /sup 0/ API oil, has high porosity (more than 60%), low permeability (less than 1 md), and natural fractures. Because of the Diatomite's low permeability, fracture stimulation is being used to increase well productivity. SCPI anticipates that approximately 5% of the almost 2 billion barrels of oil originally in place will be recovered by primary production.

  19. Generic thin-shell gravastars

    E-Print Network [OSTI]

    Martin-Moruno, Prado; Lobo, Francisco S N; Visser, Matt

    2011-01-01

    We construct generic spherically symmetric thin-shell gravastars by using the cut-and-paste procedure. We take considerable effort to make the analysis as general and unified as practicable; investigating both the internal physics of the transition layer and its interaction with "external forces" arising due to interactions between the transition layer and the bulk spacetime. Furthermore, we discuss both the dynamic and static situations. In particular, we consider "bounded excursion" dynamical configurations, and probe the stability of static configurations. For gravastars there is always a particularly compelling configuration in which the surface energy density is zero, while surface tension is nonzero.

  20. Shell appraising deepwater discovery off Philippines

    SciTech Connect (OSTI)

    Scherer, M. ); Lambers, E.J.T.; Steffens, G.S. )

    1993-05-10

    Shell International Petroleum Co. Ltd. negotiated a farmout in 1990 from Occidental International Exploration and Production Co. for Block SC-38 in the South China Sea off Palawan, Philippines, following Oxy's discovery of gas in 1989 in a Miocene Nido limestone buildup. Under the terms of the farmout agreement, Shell became operator with a 50% share. Following the disappointing well North Iloc 1, Shell was successful in finding oil and gas in Malampaya 1. Water 700-1,000 m deep, remoteness, and adverse weather conditions have imposed major challenges for offshore operations. The paper describes the tectonic setting; the Nido limestone play; the Malampaya discovery; and Shell's appraisal studies.

  1. Material with core-shell structure

    DOE Patents [OSTI]

    Luhrs, Claudia (Rio Rancho, NM); Richard, Monique N. (Ann Arbor, MI); Dehne, Aaron (Maumee, OH); Phillips, Jonathan (Rio Rancho, NM); Stamm, Kimber L. (Ann Arbor, MI); Fanson, Paul T. (Brighton, MI)

    2011-11-15

    Disclosed is a material having a composite particle, the composite particle including an outer shell and a core. The core is made from a lithium alloying material and the outer shell has an inner volume that is greater in size than the core of the lithium alloying material. In some instances, the outer mean diameter of the outer shell is less than 500 nanometers and the core occupies between 5 and 99% of the inner volume. In addition, the outer shell can have an average wall thickness of less than 100 nanometers.

  2. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Andrew Dusevic, Hanika Rahman, Marc Zinman, Peng Yao Wang, Tyler Tsui

    E-Print Network [OSTI]

    Rahman, Marc Zinman, Peng Yao Wang, Tyler Tsui SEGREGATION OF WASTE SOLVENTS QUANTITATIVE ANALYSIS (Process Engineer) Andrew Dusevic (Design Engineer) Tyler Tsui (Quality Assurance Engineer) Marc Zinman (Safety & Environmental Engineer) Hanika Rahman Peng Yao Wang Andrew Dusevic Tyler Tsui Marc Zinman #12;ii

  3. Manifold Learning for 4D CT Reconstruction of the Lung Manfred Georg*, Richard Souvenir, Andrew Hope, Robert Pless*

    E-Print Network [OSTI]

    Pless, Robert

    Manifold Learning for 4D CT Reconstruction of the Lung Manfred Georg*, Richard Souvenir, Andrew, Canada Andrew.Hope@rmp.uhn.on.ca Abstract Computed Tomography is used to create models of lung dynamics because it provides high contrast images of lung tissue. Creating 4D CT models which capture dynamics

  4. Eddy transport as a key component of the Antarctic overturning circulation1 Andrew F. Thompson, California Institute of Technology3

    E-Print Network [OSTI]

    Stewart, Andrew

    Eddy transport as a key component of the Antarctic overturning circulation1 2 Andrew F. Thompson, California Institute of Technology3 Karen J. Heywood, University of East Anglia4 Sunke Schmitdtko, University of East Anglia & GEOMAR5 Andrew L. Stewart, California Institute of Technology & University of California

  5. Rigorous HDD Emissions Capabilities of Shell GTL Fuel | Department...

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

    Rigorous HDD Emissions Capabilities of Shell GTL Fuel Rigorous HDD Emissions Capabilities of Shell GTL Fuel 2005 Diesel Engine Emissions Reduction (DEER) Conference Presentations...

  6. Impact of External Heat-shielding Techniques on Shell Surface...

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

    External Heat-shielding Techniques on Shell Surface Temperatures and Dynamic Shell Thermal Deformation of Diesel Engine Emission Control Systems Impact of External Heat-shielding...

  7. Derivation of a poroelastic flexural shell model

    E-Print Network [OSTI]

    Mikelic, Andro

    2015-01-01

    In this paper we investigate the limit behavior of the solution to quasi-static Biot's equations in thin poroelastic flexural shells as the thickness of the shell tends to zero and extend the results obtained for the poroelastic plate by Marciniak-Czochra and Mikeli\\'c. We choose Terzaghi's time corresponding to the shell thickness and obtain the strong convergence of the three-dimensional solid displacement, fluid pressure and total poroelastic stress to the solution of the new class of shell equations. The derived bending equation is coupled with the pressure equation and it contains the bending moment due to the variation in pore pressure across the shell thickness. The effective pressure equation is parabolic only in the normal direction. As additional terms it contains the time derivative of the middle-surface flexural strain. Derivation of the model presents an extension of the results on the derivation of classical linear elastic shells by Ciarlet and collaborators to the poroelastic shells case. The n...

  8. THE DEEP ATLANTIC OCEAN Lisa A. LEVIN and Andrew J. GOODAY

    E-Print Network [OSTI]

    Levin, Lisa

    Chapter 5 THE DEEP ATLANTIC OCEAN Lisa A. LEVIN and Andrew J. GOODAY INTRODUCTION The Atlantic are covered in Chapter 4 of this volume. Following a description of the environment of the deep Atlantic influences the movement of surface currents (Longhurst, 1998) and, ultimately, the nature of the deep

  9. Bibliometric Impact Measures Leveraging Topic Analysis Gideon S. Mann, David Mimno, Andrew McCallum

    E-Print Network [OSTI]

    McCallum, Andrew

    Bibliometric Impact Measures Leveraging Topic Analysis Gideon S. Mann, David Mimno, Andrew McCallum Department of Computer Science University of Massachusetts Amherst Amherst MA 01003 {gmann-grained, faceted top- ics produced by such models provide a clearer view of the topical divisions of a body

  10. Fourier information optics for the ultrafast time domain Andrew M. Weiner

    E-Print Network [OSTI]

    Purdue University

    Fourier information optics for the ultrafast time domain Andrew M. Weiner School of Electrical); published 26 November 2007 Ultrafast photonic signal processing based on Fourier optics principles offers of ultrafast optical signals via conversion between time, space, and optical frequency (Fourier) domains

  11. AISEC: an Artificial Immune System for E-mail Classification Andrew Secker

    E-Print Network [OSTI]

    Timmis, Jon

    of continuous learning for the purposes of two-class classification and is illustrated here on the taskAISEC: an Artificial Immune System for E-mail Classification Andrew Secker Computing Laboratory-interesting without the need for re-training. Comparisons are drawn with a naïve Bayesian classifier and it is shown

  12. Efficient Receipt-Free Ballot Casting Resistant to Covert Channels Ben Adida C. Andrew Neff

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Efficient Receipt-Free Ballot Casting Resistant to Covert Channels Ben Adida C. Andrew Neff Abstract We present an efficient, covert-channel-resistant, receipt-free ballot casting scheme that can elections of yore: cast ballots are available for all to see on a public bulletin board, and the tabulation

  13. Intrinsic Motivation For Reinforcement Learning Systems Andrew G. Barto and Ozgur Simsek

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Intrinsic Motivation For Reinforcement Learning Systems Andrew G. Barto and ¨Ozg¨ur S@cs.umass.edu Abstract-- Motivation is a key factor in human learning. We learn best when we are highly motivated to learn. Psychologists distinguish between extrinsically-motivated behavior, which is behavior undertaken

  14. Efficient, Sensitivity Resistant Binary Instrumentation Andrew R. Bernat, Kevin Roundy, and Barton P. Miller

    E-Print Network [OSTI]

    Miller, Barton P.

    is frequently the only available form of a given program. Even in other domains, binary instrumentation mayEfficient, Sensitivity Resistant Binary Instrumentation Andrew R. Bernat, Kevin Roundy, and Barton,roundy,bart}@cs.wisc.edu ABSTRACT Binary instrumentation allows users to inject new code into programs without requiring source code

  15. The Generic Graph Component Library LieQuan Lee Jeremy G. Siek Andrew Lumsdaine

    E-Print Network [OSTI]

    Lumsdaine, Andrew

    The Generic Graph Component Library Lie­Quan Lee Jeremy G. Siek Andrew Lumsdaine Laboratory In this paper we present the Generic Graph Component Library (GGCL), a generic programming framework for graph data struc­ tures and graph algorithms. Following the theme of the Standard Template Library (STL

  16. Identification of Idiom Usage in C++ Generic Andrew Sutton, Ryan Holeman, Jonathan I. Maletic

    E-Print Network [OSTI]

    Maletic, Jonathan I.

    Identification of Idiom Usage in C++ Generic Libraries Andrew Sutton, Ryan Holeman, Jonathan I of C++ generic libraries is presented. The goal is to assist developers in understanding the complex syntactic elements of these libraries. Large C++ generic libraries are notorious for being extremely

  17. APPL: A Probability Programming Language Maj. Andrew G. GLEN, Diane L. EVANS, and Lawrence M. LEEMIS

    E-Print Network [OSTI]

    Leemis, Larry

    APPL: A Probability Programming Language Maj. Andrew G. GLEN, Diane L. EVANS, and Lawrence M having arbitrary distributions. This arti- cle presents a prototype probability package named APPL (A probability software package, referred to as "A Prob- ability Programming Language" (APPL), that fills

  18. Models for monitoring wind farm power Andrew Kusiak*, Haiyang Zheng, Zhe Song

    E-Print Network [OSTI]

    Kusiak, Andrew

    Models for monitoring wind farm power Andrew Kusiak*, Haiyang Zheng, Zhe Song Department online 9 July 2008 Keywords: Wind farm Data mining Power prediction Monitoring Evolutionary computation Control chart a b s t r a c t Different models for monitoring wind farm power output are considered. Data

  19. Fabrication of microfluidic hydrogels using molded gelatin as a sacrificial Andrew P. Golden and Joe Tien*

    E-Print Network [OSTI]

    Tien, Joe

    Fabrication of microfluidic hydrogels using molded gelatin as a sacrificial element{ Andrew P for the formation of hydrogels that contain microfluidic networks. In this procedure, micromolded meshes of gelatin served as sacrificial materials. Encapsulation of gelatin meshes in a hydrogel and subsequent melting

  20. Wind climatology of Schiphol Andrew Stepek, Xueli Wang and Dirk Wolters

    E-Print Network [OSTI]

    Haak, Hein

    Wind climatology of Schiphol Andrew Stepek, Xueli Wang and Dirk Wolters De Bilt, May 2012 #12;2 Contents Summary 2 Introduction 3 Data 3 Hourly wind measurements 3 Yearly averages of wind speed measurements 4 Quality and sources of error 6 Method 7 Trends in wind speed 7 Definition of cross and tail wind

  1. Design of wind farm layout for maximum wind energy capture Andrew Kusiak*, Zhe Song

    E-Print Network [OSTI]

    Kusiak, Andrew

    of reducing the cost of producing wind power: for example, the site selection, site layout design, predictiveDesign of wind farm layout for maximum wind energy capture Andrew Kusiak*, Zhe Song Intelligent Accepted 24 August 2009 Available online 22 September 2009 Keywords: Wind farm Wind turbine Layout design

  2. The Legion Grid Portal Anand Natrajan, Anh Nguyen-Tuong, Marty A. Humphrey, Andrew S. Grimshaw

    E-Print Network [OSTI]

    Grimshaw, Andrew

    1 The Legion Grid Portal Anand Natrajan, Anh Nguyen-Tuong, Marty A. Humphrey, Andrew S. Grimshaw Abstract -- The Legion Grid Portal is an interface to a grid system. Users interact with the portal, and view accounting information. The architecture of the portal is designed to accommodate multiple diverse

  3. Jeri Muoio's gun ban at West Palm Beach city hall By ANDREW ABRAMSON

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Jeri Muoio's gun ban at West Palm Beach city hall draws fire By ANDREW ABRAMSON Palm Beach Post Jeri Muoio might negotiate on some issues, but when it comes to guns in city hall, she holds her ground with a gun," Muoio said at a city commission meeting last month. "If you're coming into city hall, leave your

  4. The Finitary Andrews-Curtis Conjecture Alexandre V. Borovik Alexander Lubotzky

    E-Print Network [OSTI]

    Lubotzky, Alex

    Y G we denote by gpG (Y ) the normal closure of Y in G, by d(G) the minimal number of generators as a normal subgroup: Nk(G) = {(g1, . .,.gk) | gpG (g1, . .,.gk).= G } Then the Andrews

  5. Frontline Earth Science Research @ St Andrews The Rise and Fall of Mountain Belts

    E-Print Network [OSTI]

    Brierley, Andrew

    1 Frontline Earth Science Research @ St Andrews (FRESH) The Rise and Fall of Mountain Belts 18 and for controlling the tectonics of mountain building by Z ZZ- dZ ZZ tween tectonics and anatexis and establish (28-23 Ma) suite comprises anastamosing sheets of foli- ated two-mica, garnet-bearing granite

  6. Prediction, operations, and condition monitoring in wind energy Andrew Kusiak a,*, Zijun Zhang b

    E-Print Network [OSTI]

    Kusiak, Andrew

    Review Prediction, operations, and condition monitoring in wind energy Andrew Kusiak a,*, Zijun 2013 Available online 23 August 2013 Keywords: Wind energy Wind speed prediction Wind turbine control Condition monitoring and fault detection a b s t r a c t Recent developments in wind energy research

  7. Frontline Earth Science Research @ St Andrews The Rise of the Earth System

    E-Print Network [OSTI]

    Brierley, Andrew

    1 Frontline Earth Science Research @ St Andrews The Rise of the Earth System: A Tale of Ice, Oxygen Department of Earth and Environmental Sciences, may I extend a very warm welcome to you at this half-day symposium. This is the third such event we have hosted; the first, Insights into Earth Processes from

  8. The low utilization and high cost of data networks Andrew Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    The low utilization and high cost of data networks Andrew Odlyzko AT&T Labs - Research amo efficiency in utilization of transmission lines. However, this is a misconception. Packet networks (PSTN). The high costs of corporate packet networks are caused primarily by low utilization rates, far

  9. Cross-shore suspended sediment transport under tidal currents Andrew J. Hogg1

    E-Print Network [OSTI]

    Hogg, Andrew

    Cross-shore suspended sediment transport under tidal currents Andrew J. Hogg1 and David Pritchard2-mail: david@bpi.cam.ac.uk Abstract The transport of sediment over an intertidal mudflat by a cross-shore tidal-layer approximation. It is found that the sediment transport comprises advection with the mean flow, deposition

  10. Quantum algorithms for the ordered search problem via semidefinite programming Andrew M. Childs,1,

    E-Print Network [OSTI]

    Landahl, Andrew J.

    Quantum algorithms for the ordered search problem via semidefinite programming Andrew M. Childs,1 a desired item in an ordered list of N items. While the best classical algorithm for this problem uses log2 query algorithms for the ordered search problem in terms of a semidefinite program, we find quantum

  11. Locally convex topologies and control theory Saber Jafarpour Andrew D. Lewis

    E-Print Network [OSTI]

    Lewis, Andrew D.

    Locally convex topologies and control theory Saber Jafarpour Andrew D. Lewis 28/01/2014 Abstract of the vector fields. Keywords. Geometric control theory, locally convex topologies, real analytic systems AMS control theory, one considers systems of the form (t) = F((t), µ(t)), where t µ(t) is a curve taking

  12. Mathematical models for geometric control theory Saber Jafarpour Andrew D. Lewis

    E-Print Network [OSTI]

    Lewis, Andrew D.

    Mathematical models for geometric control theory Saber Jafarpour Andrew D. Lewis 21/12/2013 Last by control is commonplace in control theory, leading to definitions, methodologies, and results that depend in geometric control theory in a manner that does not make any choice of parameterisation by control

  13. Building Application Stack (BAS) Andrew Krioukov, Gabe Fierro, Nikita Kitaev, David Culler

    E-Print Network [OSTI]

    California at Berkeley, University of

    Building Application Stack (BAS) Andrew Krioukov, Gabe Fierro, Nikita Kitaev, David Culler Computer.fierro@berkeley.edu, kitaev@berkeley.edu, culler@cs.berkeley.edu Abstract Many commercial buildings have digital controls, detecting faults, improving comfort, etc. However, buildings are custom designed, lead- ing to differences

  14. The ecological causes of evolution Andrew D.C. MacColl

    E-Print Network [OSTI]

    Obbard, Darren

    The ecological causes of evolution Andrew D.C. MacColl School of Biology, University of Nottingham, but it is not the cause of evolution. The cause of natural selection and, therefore, of adaptive evolution, is any of species and their response to environmental change. What causes natural selection? When one contemplates

  15. Bridge Courses in the United States Student:Andrew Pyzdek Faculty Advisor: Dorin Dumitrascu

    E-Print Network [OSTI]

    Fatkullin, Ibrahim

    Bridge Courses in the United States Student:Andrew Pyzdek Faculty Advisor: Dorin Dumitrascu, and the approach taken by American universities when offering a "bridge course." We understand a "bridge course bridge course at the University of Arizona, Math 323 -Formal Mathematical Reasoning and Writing

  16. Up the photon staircase: photons repel each other (DMR 0819860) Seed: Hakan Tureci and Andrew Houck

    E-Print Network [OSTI]

    Petta, Jason

    Up the photon staircase: photons repel each other (DMR 0819860) Seed: Hakan Tureci and Andrew Houck -- a phenomenon referred to as "coulomb blockade" (Fig. 1). Photons are neutral, so they do not feel the Coulomb force. However, under special conditions, photons can manifest strong mutual repulsion effects. PCCM

  17. On the Importance of Surface Forcing in Conceptual Models of the Deep Ocean ANDREW L. STEWART

    E-Print Network [OSTI]

    mixing. The deep cell of the MOC is supplied by the outflow of Antarctic Bottom Water (AABW; Gordon 2009On the Importance of Surface Forcing in Conceptual Models of the Deep Ocean ANDREW L. STEWART Environmental Sciences and Engineering, California Institute of Technology, Pasadena, California RAFFAELE

  18. Generalized optical theorem for surface waves and layered media David Halliday* and Andrew Curtis*

    E-Print Network [OSTI]

    Generalized optical theorem for surface waves and layered media David Halliday* and Andrew Curtis; published 8 May 2009 We present a generalized optical theorem for surface waves. The theorem also applies summations. This theorem therefore extends the domain of applicability of the optical theorem from

  19. BENCHMARKING ROBOT PATH PLANNING ANDREW N. HAND, JAGRUTHI GODUGU, KAVEH ASHENAYI,

    E-Print Network [OSTI]

    Wainwright, Roger L.

    1 BENCHMARKING ROBOT PATH PLANNING ANDREW N. HAND, JAGRUTHI GODUGU, KAVEH ASHENAYI, THEODORE W Algorithms (GA's) to develop an algorithm for autonomous robot navigation. We have achieved significant in different categories as Easy, Moderate, Difficult and Very Difficult. INTRODUCTION An autonomous robot

  20. Swipe Vs. Scroll: Web Page Switching on Mobile Browsers Andrew Warr, Ed H. Chi

    E-Print Network [OSTI]

    Cortes, Corinna

    Swipe Vs. Scroll: Web Page Switching on Mobile Browsers Andrew Warr, Ed H. Chi Google Inc. 1600 interfaces enable users to multi-task and easily switch between open web pages. However, tabbed browsing web page could be displayed in an individual window at a time. This was problematic when viewing

  1. Eddy Heat Flux in the Southern Ocean: Response to Variable Wind Forcing ANDREW MCC. HOGG

    E-Print Network [OSTI]

    Miami, University of

    kinetic energy, and eddy heat transport to changes in winds is quantified. On interannual time scales- ern Ocean, wind appears to be the most likely energy source for the anomalously large EKE. MeredithEddy Heat Flux in the Southern Ocean: Response to Variable Wind Forcing ANDREW MCC. HOGG Australian

  2. Dripping to Jetting Transitions in Coflowing Liquid Streams Andrew S. Utada,1

    E-Print Network [OSTI]

    Dripping to Jetting Transitions in Coflowing Liquid Streams Andrew S. Utada,1 Alberto Fernandez dripping to jetting is not understood for coflowing fluid streams, unlike the case of drop formation in air a microcapillary device to study the transition between dripping and jetting in a two-phase coflowing stream

  3. Using the ACM Java Libraries in CS 1 Andrew Mertz, William Slough, and Nancy Van Cleave

    E-Print Network [OSTI]

    Van Cleave, Nancy K.

    Using the ACM Java Libraries in CS 1 Andrew Mertz, William Slough, and Nancy Van Cleave aemertz University Charleston, IL 61920 Abstract The Java language is commonly used in CS 1 courses, though its of these challenges, the ACM established the Java Task Force to study the problem. The work of this committee resulted

  4. Lyapunov Theory for Zeno Stability Andrew Lamperski and Aaron D. Ames

    E-Print Network [OSTI]

    Ames, Aaron

    1 Lyapunov Theory for Zeno Stability Andrew Lamperski and Aaron D. Ames Abstract--Zeno behavior Lyapunov theory; that is, we present Lyapunov- like sufficient conditions for Zeno behavior obtained the connections between Zeno behavior and Lyapunov stability. In classical dynamical systems, sta- bility

  5. Perfect Strong Scaling Using No Additional Energy James Demmel, Andrew Gearhart, Benjamin Lipshitz, and Oded Schwartz

    E-Print Network [OSTI]

    California at Berkeley, University of

    Perfect Strong Scaling Using No Additional Energy James Demmel, Andrew Gearhart, Benjamin Lipshitz, and Oded Schwartz Electrical Engineering and Computer Sciences University of California, Berkeley Berkeley, USA {demmel,agearh,lipshitz,odedsc}@cs.berkeley.edu Abstract--Energy efficiency of computing devices

  6. Shielding applications from an untrusted cloud with Haven Andrew Baumann Marcus Peinado Galen Hunt

    E-Print Network [OSTI]

    Chase, Jeffrey S.

    Shielding applications from an untrusted cloud with Haven Andrew Baumann Marcus Peinado Galen Hunt any of their private data. We introduce the notion of shielded execution, which protects operator's OS, VM and firmware). Our prototype, Haven, is the first system to achieve shielded execution

  7. The economics of the Internet: Utility, utilization, pricing, and Quality of Andrew Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    The economics of the Internet: Utility, utilization, pricing, and Quality of Service Andrew Odlyzko economically for all transmissions on the Internet? Current work assumes that it cannot, and concentrates on providing differentiated service levels. However, an examination of patterns of use and economics of data

  8. Gain-scheduling control of port-fuel-injection processes Andrew White a

    E-Print Network [OSTI]

    Choi, Jongeun

    of gasoline PFI and ethanol DI dual-fuel system to substantially increase gasoline engine efficiencyGain-scheduling control of port-fuel-injection processes Andrew White a , Jongeun Choi a,b,Ã, Ryozo: Engine control Port fuel injection Gain-scheduling control Linear parameter varying system LMI

  9. Low frequency variability of Southern Ocean jets Andrew F. Thompson1,2

    E-Print Network [OSTI]

    Thompson, Andrew

    Low frequency variability of Southern Ocean jets Andrew F. Thompson1,2 and Kelvin J. Richards3 is concentrated in a large number (approximately 8 to 12) of narrow filamentary jets. It is shown here that coherent jets exhibit a range of low frequency variability, on timescales of months to years, that can lead

  10. An Introduction to the Application of Formal Theories to GIS Thomas Bittner and Andrew U. Frank

    E-Print Network [OSTI]

    Bittner, Thomas

    An Introduction to the Application of Formal Theories to GIS Thomas Bittner and Andrew U. Frank methods to geographic space. We model GIS as formal systems of logic. This allows to apply methods notions of formal systems and formal theories. We use a running example from the context of GIS. 1

  11. The Internet and other networks: Utilization rates and their implications Andrew Odlyzko

    E-Print Network [OSTI]

    Odlyzko, Andrew M.

    The Internet and other networks: Utilization rates and their implications Andrew Odlyzko AT&T Labs disprove many popular myths about the Internet. Although packet networks are often extolled the efficiency of data transport and making the Internet less expensive and more useful. On the other hand, many

  12. End-to-End Availability Policies and Noninterference Lantian Zheng Andrew C. Myers

    E-Print Network [OSTI]

    Hamlen, Kevin W.

    End-to-End Availability Policies and Noninterference Lantian Zheng Andrew C. Myers Computer Science information flow analysis for the specification and enforcement of end-to- end availability policies, to also include security policies for availability. These policies characterize acceptable risks

  13. Lithography and Design in Partnership: A New Roadmap Andrew B. Kahng

    E-Print Network [OSTI]

    Kahng, Andrew B.

    Lithography and Design in Partnership: A New Roadmap Andrew B. Kahng UCSD Departments of CSE roadmap' between lithography and design from several perspectives. First, we examine cultural gaps and other intrinsic barriers to a shared roadmap. Second, we discuss how lithography technol- ogy can change

  14. Cloud Computing: a Perspective Study Lizhe WANG, Gregor von LASZEWSKI, Younge ANDREW, Xi HE

    E-Print Network [OSTI]

    Cloud Computing: a Perspective Study Lizhe WANG, Gregor von LASZEWSKI, Younge ANDREW, Xi HE Service@ntu.edu.sg Received 1 Dec 2008 Abstract The Cloud computing emerges as a new computing paradigm which aims to provide study the Cloud computing paradigm from various aspects, such as definitions, distinct features

  15. A Survey of Bioengineering Research in Canada-2007 Andrew J. Daugulis

    E-Print Network [OSTI]

    Daugulis, Andrew J.

    REVIEWS A Survey of Bioengineering Research in Canada-2007 Andrew J. Daugulis Dept. of Chemical InterScience (www.interscience.wiley.com). Research activity in bioengineering at Canadian universities. The information provided has been grouped by topics within the broad theme of ``Bioengineering,'' and con

  16. Wireless energy transfer between anisotropic metamaterials shells

    SciTech Connect (OSTI)

    Díaz-Rubio, Ana; Carbonell, Jorge; Sánchez-Dehesa, José

    2014-06-15

    The behavior of strongly coupled Radial Photonic Crystals shells is investigated as a potential alternative to transfer electromagnetic energy wirelessly. These sub-wavelength resonant microstructures, which are based on anisotropic metamaterials, can produce efficient coupling phenomena due to their high quality factor. A configuration of selected constitutive parameters (permittivity and permeability) is analyzed in terms of its resonant characteristics. The coupling to loss ratio between two coupled resonators is calculated as a function of distance, the maximum (in excess of 300) is obtained when the shells are separated by three times their radius. Under practical conditions an 83% of maximum power transfer has been also estimated. -- Highlights: •Anisotropic metamaterial shells exhibit high quality factors and sub-wavelength size. •Exchange of electromagnetic energy between shells with high efficiency is analyzed. •Strong coupling is supported with high wireless transfer efficiency. •End-to-end energy transfer efficiencies higher than 83% can be predicted.

  17. Orthotropic rotation-free thin shell elements

    E-Print Network [OSTI]

    Munglani, Gautam; Wittel, Falk K; Herrmann, Hans J

    2015-01-01

    A method to simulate orthotropic behaviour in thin shell finite elements is proposed. The approach is based on the transformation of shape function derivatives, resulting in a new orthogonal basis aligned to a specified preferred direction for all elements. This transformation is carried out solely in the undeformed state leaving minimal additional impact on the computational effort expended to simulate orthotropic materials compared to isotropic, resulting in a straightforward and highly efficient implementation. This method is implemented for rotation-free triangular shells using the finite element framework built on the Kirchhoff--Love theory employing subdivision surfaces. The accuracy of this approach is demonstrated using the deformation of a pinched hemispherical shell (with a 18{\\deg} hole) standard benchmark. To showcase the efficiency of this implementation, the wrinkling of orthotropic sheets under shear displacement is analyzed. It is found that orthotropic subdivision shells are able to capture t...

  18. Finite element analysis of shells with layers

    E-Print Network [OSTI]

    Hiller, Jean-François, 1974-

    2002-01-01

    It is well established that thin shell structures frequently feature narrow bands of strain concentration and localized displacement irregularities referred to as boundary and internal layers. It is crucial to capture these ...

  19. Double shell tank waste analysis plan

    SciTech Connect (OSTI)

    Mulkey, C.H.; Jones, J.M.

    1994-12-15

    Waste analysis plan for the double shell tanks. SD-WM-EV-053 is Superseding SD-WM-EV-057.This document provides the plan for obtaining information needed for the safe waste handling and storage of waste in the Double Shell Tank Systems. In Particular it addresses analysis necessary to manage waste according to Washington Administrative Code 173-303 and Title 40, parts 264 and 265 of the Code of Federal Regulations.

  20. HI in the shell elliptical NGC 3656

    E-Print Network [OSTI]

    M. Balcells; J. H. van Gorkom; R. Sancisi; C. del Burgo

    2001-07-09

    VLA neutral hydrogen observations of the shell elliptical NGC 3656 reveal an edge-on, warped minor axis gaseous disk (M_HI ~ 2.10^9 Msun) extending 7 kpc. HI is also found outside the optical image, on two complexes to the North-East and North-West that seem to trace an outer broken HI disk or ring, or possibly one or two tidal tails. Integral-field optical fiber spectroscopy at the region of the bright southern shell of NGC 3656 has provided a determination of the stellar velocities of the shell. The shell has traces of HI with velocities bracketing the stellar velocities, providing evidence for a dynamical association of HI and stars at the shell. Within the errors the stars have systemic velocity, suggesting a possible phase wrapping origin for the shell. We detect five dwarf galaxies with HI masses ranging from 2.10^8 Msun to 2.10^9 Msun all within 180 kpc from NGC 3656 and all within the velocity range (450 \\kms) of the HI of NGC 3656. For the NGC 3656 group to be bound requires a total mass of 3-7.4x10^{12} Msun, yielding a mass to light ratio from 125 to 300. The overall HI picture presented by NGC 3656 supports the hypothesis of a disk-disk merger origin, or possibly an ongoing process of multiple merger with nearby dwarfs.

  1. Non-Planar On-Shell Diagrams

    E-Print Network [OSTI]

    Sebastian Franco; Daniele Galloni; Brenda Penante; Congkao Wen

    2015-03-17

    We initiate a systematic study of non-planar on-shell diagrams in N=4 SYM and develop powerful technology for doing so. We introduce canonical variables generalizing face variables, which make the dlog form of the on-shell form explicit. We make significant progress towards a general classification of arbitrary on-shell diagrams by means of two classes of combinatorial objects: generalized matching and matroid polytopes. We propose a boundary measurement that connects general on-shell diagrams to the Grassmannian. Our proposal exhibits two important and non-trivial properties: positivity in the planar case and it matches the combinatorial description of the diagrams in terms of generalized matroid polytopes. Interestingly, non-planar diagrams exhibit novel phenomena, such as the emergence of constraints on Plucker coordinates beyond Plucker relations when deleting edges, which are neatly captured by the generalized matching and matroid polytopes. This behavior is tied to the existence of a new type of poles in the on-shell form at which combinations of Plucker coordinates vanish. Finally, we introduce a prescription, applicable beyond the MHV case, for writing the on-shell form as a function of minors directly from the graph.

  2. projet conjoint parrain par la Fondation Shell et Shell Gabon, des chercheurs de l'Institution

    E-Print Network [OSTI]

    Baker, Robert J.

    projet conjoint parrainé par la Fondation Shell et Shell Gabon, des chercheurs de l, le Cameroun et la Guinée-Équatoriale. Le pays est baigné par un climat tropical humide avec une'orientation par écholocation des Microchiroptères représente une adaptation évolutive unique à la vie nocturne

  3. Dextral snail shells coil rightwards, and sinistral shells coil leftwards. Sinistral Satsuma snails

    E-Print Network [OSTI]

    Martin, Paul R.

    Dextral snail shells coil rightwards, and sinistral shells coil leftwards. Sinistral Satsuma snails cannot mate with right-coiling Satsuma species, leading scientists to wonder how sinistrality could have stick to right-coiling species as its jaws are specialized for grasping them. (Snake jaw, with extra

  4. Judging Slaughter Steers. 

    E-Print Network [OSTI]

    Thompson, Uel D.; Wythe, L. D. Jr.

    1964-01-01

    be de- ciding factors in placing steers equal in muscling ;inti desirable finish. Jluscling has to do with a steer's conformation, conlmonly referred to as form or shape. Desirable conformation must increase production efficiency ;tncl,'or improve... or fatness and is the major factor affecting carcass yield of retail cuts, meat quality and dressing percentage. The negative effect of fatness on yield of retail cuts is more than twice as great as the positive effect of muscling. External fat covering...

  5. Slaughter Calf Production. 

    E-Print Network [OSTI]

    Thompson, Uel D.

    1955-01-01

    - uations also must be considered in view of mar- ket prices. Proper management of herd bulls directly affects the calf crop percentage, and handling of the herd at calving time needs spe- cial attention. Dehorning, castrating, brand- ing, disease... grasses and legumes is necessary for maximum grazing. This management may consist of fer- tilizing, mowing and deferred or rotation graz- ing. Under such systems cropland should sup- plement permanent pastures. Allowance should be made for feed...

  6. Removable inner turbine shell with bucket tip clearance control

    DOE Patents [OSTI]

    Sexton, Brendan F. (Clifton Park, NY); Knuijt, Hans M. (Niskayuna, NY); Eldrid, Sacheverel Q. (Saratoga Springs, NY); Myers, Albert (Amsterdam, NY); Coneybeer, Kyle E. (Schenectady, NY); Johnson, David Martin (Ballston Lake, NY); Kellock, Iain R. (Clifton Park, NY)

    2000-01-01

    A turbine includes a plurality of inner shell sections mounting first and second stage nozzle and shroud portions. The inner shell sections are pinned to an outer containment shell formed of sections to preclude circumferential movement of the inner shell relative to the outer shell and enable thermal expansion and contraction of the inner shell relative to the outer shell. Positive bucket tip clearance control is afforded by passing a thermal medium about the inner shell in heat transfer relation with the shrouds about the first and second stage bucket tips, the thermal medium being provided from a source of heating/cooling fluid independent of the turbine. Access is provided to the rotor and turbine buckets by removing the outer and inner shell sections.

  7. UBC Social Ecological Economic Development Studies (SEEDS) Student Report Andrew Roach, Chris Forrest, Jedaiah van Dijk, Jess Herman, Ricky Sangha, Svyatoslav Korshunov

    E-Print Network [OSTI]

    Forrest, Jedaiah van Dijk, Jess Herman, Ricky Sangha, Svyatoslav Korshunov REDEVELOPMENT OF THE UBC #3 Andrew Roach Chris Forrest ( Jedaiah van Dijk ( Jess Herman ( Ricky Sangha ( Svyatoslav Korshunov

  8. Shell model description of Ge isotopes

    E-Print Network [OSTI]

    J. G. Hirsch; P. C. Srivastava

    2012-04-12

    A shell model study of the low energy region of the spectra in Ge isotopes for $38\\leq N\\leq 50$ is presented, analyzing the excitation energies, quadrupole moments, $B(E2)$ values and occupation numbers. The theoretical results have been compared with the available experimental data. The shell model calculations have been performed employing three different effective interactions and valence spaces.We have used two effective shell model interactions, JUN45 and jj44b, for the valence space $f_{5/2} \\, p \\,g_{9/2}$ without truncation. To include the proton subshell $f_{7/2}$ in valence space we have employed the $fpg$ effective interaction due to Sorlin {\\it et al.}, with $^{48}$Ca as a core and a truncation in the number of excited particles.

  9. Shell model study of the pairing correlations

    E-Print Network [OSTI]

    J. A. Sheikh; P. A. Ganai; R. P. Singh; R. K. Bhowmick; S. Frauendorf

    2007-12-19

    A systematic study of the pairing correlations as a function of temperature and angular momentum has been performed in the sd-shell region using the spherical shell model approach. The pairing correlations have been derived for even-even, even-odd and odd-odd systems near N=Z and also for the asymmetric case of N=Z+4. The results indicate that the pairing content and the behavior of pair correlations is similar in even-even and odd-mass nuclei. For odd-odd N=Z system, angular momentum I=0 state is an isospin, t=1 neutron-proton paired configuration. Further, these t=1 correlations are shown to be dramatically reduced for the asymmetric case of N=Z+4. The shell model results obtained are qualitatively explained within a simplified degenerate model.

  10. Wireless energy transfer between anisotropic metamaterials shells

    E-Print Network [OSTI]

    Diaz-Rubio, Ana; Sanchez-Dehesa, Jose

    2013-01-01

    The behavior of strongly coupled Radial Photonic Crystals shells is investigated as a potential alternative to transfer electromagnetic energy wirelessly. These sub-wavelength resonant microstructures, which are based on anisotropic metamaterials, can produce efficient coupling phenomena due to their high quality factor. A configuration of selected constitutive parameters (permittivity and permeability) is analyzed in terms of its resonant characteristics. The coupling to loss ratio between two coupled resonators is calculated as a function of distance, the maximum (in excess of 300) is obtained when the shells are separated by three times their radius. Under practical conditions an 83% of maximum power transfer has been also estimated.

  11. Deflection Effects in Inner-Shell Ionization 

    E-Print Network [OSTI]

    Swafford, G. L.; Reading, John F.; Ford, A. Lewis; Fitchard, E.

    1977-01-01

    January 1977) Recently a method of calculating inner-shell ionization has been formulated in which Hartree-Pock wave functions are employed and all terms in the Born series retained. Results have so far been presented only in the energy region where... VOLUME 16, NUMBER 3 Deflection effects in inner-shell ionization* SEPTEMBER 1977 G. L. SwafRrd, J. F. Reading, A. L Ford, and E. Fitchard Cyclotron Institute and Department of Physics, Texas A&.M University, College Station, Texas 77843 (Received 10...

  12. A review of "Literature and Domestic Travel in Early Modern England" by Andrew McRae 

    E-Print Network [OSTI]

    Aune, M. G.

    2012-01-01

    Rae. Literature and Domestic Travel in Early Modern England. Cambridge: Cambridge University Press, 2009. xi + 247 pp. + 9 illus. $90.00. Review by ?.?. ????, ?? ??????? ?????????? ?? ?????? ?????. ?e work of Andrew McRae, professor of English... latest work, adding travel narratives, maps, and travel guides. McRae uses mobility as his access point into domestic travel, writing in the introduction that ?mobility lent shape to some of the de?nitive transformations of the era: from the shift...

  13. Modeling single family housing recovery after Hurricane Andrew in Miami-Dade County, FL 

    E-Print Network [OSTI]

    Zhang, Yang

    2009-06-02

    Hurricane Hugo Loma Prieta Earthquake Hurricane Andrew Northridge Earthquake Hurricane Katrina Time Sept. 1989 Oct. 1989 Aug. 1992 Jan. 1994 Aug. 2005 Physical Severity1 Category 4 Magnitude 7.1 Category 5 Magnitude 6.8 Category 4 Impact area SC, NC CA...**** 1: Hurricanes are measured on the Saffir ? Simpson Scale when they make landfall; earthquakes are measured by Richter scale. 2: Not Available. Source: National Low Income Housing Coalition 2005; Comerio 1998 This research seeks to improve...

  14. Parents and Families LEHIGH UNIVERSITY 1 Jacalyn F. `78 and Andrew Aaron `09P

    E-Print Network [OSTI]

    Napier, Terrence

    Parents and Families LEHIGH UNIVERSITY 1 Jacalyn F. `78 and Andrew Aaron `09P Deborah J. Goodman and David E. Abbey `07P `12P Herand Abcarian `03P John H. Abel `90P `F/S ++ Teri S. and Mark A. Aboud `13P Rebecca A. and Renaldo M. Abreu `13P Lynne J. Acierno and Douglas D. Bradley `11P Heidi B. and Cory S

  15. SHELL DEFORMITY OF MOLLUSKS ATTRIBUTABLE TO THE HYDROID, HYDRACTINIA ECHINATA

    E-Print Network [OSTI]

    by producing a new shell edge within the existing perimeter of the shell and by. passing the hydroid colony. The upper valve of the sea scallop, Pla,copecten nwgellanic1ts (Gmelin), provides such a surface. Organisms

  16. Buckling-induced encapsulation of structured elastic shells under pressure

    E-Print Network [OSTI]

    Shim, Jongmin

    We introduce a class of continuum shell structures, the Buckliball, which undergoes a structural transformation induced by buckling under pressure loading. The geometry of the Buckliball comprises a spherical shell patterned ...

  17. Copyright 2012 by Hyopil Shin, Munhyong Kim, Hayeon Jang, and Andrew Cattle 26th Pacific Asia Conference on Language,Information and Computation pages 181190

    E-Print Network [OSTI]

    Copyright 2012 by Hyopil Shin, Munhyong Kim, Hayeon Jang, and Andrew Cattle 26th Pacific Asia Corpus in Korean Hyopil Shin, Munhyong Kim, Yu-Mi Jo, Hayeon Jang, and Andrew Cattle a Department and conclusions. 181 Copyright 2012 by Hyophil Shin, Munhyong Kim, Yu-Mi Jo, Hayeon Jang, and Adrew Cattle 26 th

  18. Method of fabricating nested shells and resulting product

    DOE Patents [OSTI]

    Henderson, Timothy M. (Ann Arbor, MI); Kool, Lawrence B. (Ann Arbor, MI)

    1982-01-01

    A multiple shell structure and a method of manufacturing such structure wherein a hollow glass microsphere is surface treated in an organosilane solution so as to render the shell outer surface hydrophobic. The surface treated glass shell is then suspended in the oil phase of an oil-aqueous phase dispersion. The oil phase includes an organic film-forming monomer, a polymerization initiator and a blowing agent. A polymeric film forms at each phase boundary of the dispersion and is then expanded in a blowing operation so as to form an outer homogeneously integral monocellular substantially spherical thermoplastic shell encapsulating an inner glass shell of lesser diameter.

  19. Interstellar HI Shells Identified in the SETHI Survey

    E-Print Network [OSTI]

    Sallmen, Shauna M; Bellehumeur, Brooke; Tennyson, Elizabeth M; Grunwald, Kurt; Lo, Cheuk Man

    2015-01-01

    Galactic HI (neutral hydrogen) shells are central to our understanding of the interstellar medium (ISM), which plays a key role in the development and evolution of galaxies, including our own. Several models involving supernovae and stellar winds have contributed to our broad understanding, but a complete, detailed picture remains elusive. To extend existing Galactic shell catalogs, we visually examined the SETHI (Search for Extraterrestrial HI) database to identify shell-like structures. This high-sensitivity 21-cm radio survey covering the Arecibo sky uniquely provides high-resolution data on shells at a wide range of Galactic latitudes. We present basic information (location, radial velocity, angular size, shape) for 74 previously unidentified HI shells. Due to limitations of coverage and data quality, and the biases inherent in search techniques, our catalog is not a complete sample of Galactic shells. We discuss the catalog completeness, and comment on the new shells' relationship with known interstellar...

  20. Hanford Site single-shell tank roadmap

    SciTech Connect (OSTI)

    Not Available

    1991-04-01

    The Hanford Site Single-Shell Tank Roadmap covers the near-term waste management activities to ensure safe interim storage of 140 million liters of waste. It also addresses the environmental restoration activities to close the 6 single-shell tank operable units, which include 149 single-shell tanks. These tanks were constructed starting in the 1940`s. Sixty-six tanks have leaked or are assumed to be leaking. This Roadmap has highlighted the need for integrated planning and resource allocation. The June 1990 Five-Year Plan did not address the tank safety concerns that evolved since its publication. Potential impacts to Tri-Party Agreement milestones for characterization, stabilization and isolation, technology development/demonstration, and closure will be examined in greater detail to strengthen the technical decision basis and to minimize consequences. The Roadmap indicates the advantage of accelerating characterization programs, technology evaluations, and supplemental environmental impact statement preparation. Working with regulators and expanded public outreach programs are essential to successful completion of this activity.

  1. Oxide Shell Reduction and Magnetic Property Changes in Core-Shell Fe Nanoclusters under Ion Irradiation

    SciTech Connect (OSTI)

    Sundararajan, Jennifer A.; Kaur, Maninder; Jiang, Weilin; McCloy, John S.; Qiang, You

    2014-02-12

    Ion irradiation effects are studied on the Fe-based core-shell nanocluster (NC) films with core as Fe and shell as Fe3O4/FeO. These NC films were were deposited on Si substrates to thickness of ~0.5 micrometers using a NC deposition system. The films were irradiated at room temperature with 5.5 MeV Si2+ ions to ion fluences of 1015 and 1016 ions/cm2. It is found that the irradiation induces grain growth, Fe valence reduction in the shell, and crystallization of Fe3N. The nature and mechanism of oxide shell reduction and composition dependence after irradiation were studied by synthesizing additional NC films of Fe3O4 and FeO+Fe3N and irradiating them under the same conditions. The presence of nanocrystalline Fe is found to be a major factor for the oxide shell reduction. The surface morphologies of these films show dramatic changes in the microstructures due to cluster growth and agglomeration as a result of ion irradiation.

  2. Oxide shell reduction and magnetic property changes in core-shell Fe nanoclusters under ion irradiation

    SciTech Connect (OSTI)

    Sundararajan, Jennifer A.; Kaur, Maninder; Qiang, You, E-mail: youqiang@uidaho.edu [Department of Physics, University of Idaho, Moscow, Idaho 83844 (United States); Jiang, Weilin [Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352 (United States); McCloy, John S. [School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington 99164 (United States)

    2014-05-07

    Ion irradiation effects are studied on the Fe-based core-shell nanocluster (NC) films with core as Fe and shell as Fe{sub 3}O{sub 4}/Fe{sub 3}N. These NC films were deposited on Si substrates to thickness of ?0.5 ?m using a NC deposition system. The films were irradiated at room temperature with 5.5?MeV Si{sup 2+} ions to ion fluences of 10{sup 15} and 10{sup 16} ions/cm{sup 2}. It is found that the irradiation induces grain growth, Fe valence reduction in the shell, and crystallization or growth of Fe{sub 3}N. The film retained its Fe-core and its ferromagnetic properties after irradiation. The nature and mechanism of oxide shell reduction and composition dependence after irradiation were studied by synthesizing additional NC films of Fe{sub 3}O{sub 4} and FeO?+?Fe{sub 3}N and irradiating them under the same conditions. The presence of nanocrystalline Fe is found to be a major factor for the oxide shell reduction. The surface morphologies of these films show dramatic changes in the microstructures due to cluster growth and agglomeration as a result of ion irradiation.

  3. Andrews County, Texas ASHRAE 169-2006 Climate Zone | Open Energy

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAandAmminex A S Jump to: navigation,InofMill, Texas:Andrew

  4. Andrew M. Sessler, 1970 | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLosThe 26thI D- 6 0GrantsThe Life ofASCRLightAllen J.Andrew M. Sessler,

  5. Andrew Sessler, 2013 | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLosThe 26thI D- 6 0GrantsThe Life ofASCRLightAllen J.Andrew M.

  6. An Evolutionary Sequence of Expanding Hydrogen Shells in Galaxy Discs

    E-Print Network [OSTI]

    M. Relano; J. E. Beckman; O. Daigle; C. Carignan

    2007-03-16

    Large HI shells, with diameters of hundreds of pc and expansion velocities of 10-20kms-1 are well observed features of local gas rich galaxies. These shells could well be predicted as a result of the impact of OB associations on the ISM, but doubt has been cast on this scenario by the apparent absence of OB stars close to the centres of a large fraction of these shells in recent observations of the SMC. Using Fabry-Perot scanned Halpha emission line mapping of nearby galaxy discs we have detected, in all the HII regions where the observations yield sufficient angular resolution and S:N ratio, dominant Halpha shells with radii a few tens of pc, expanding at velocities of 50-100kms-1. We have applied a simple dynamically consistent framework in which we can extrapolate the properties of the observed Halpha shells to a few 10^7yr after the formation of the OB stars. The framework includes the dynamical inputs of both winds and SNe on the surrounding ISM. The results give quantitative statistical support to the hypothesis that the Halpha emitting shells are generic progenitors of the HI shells. During the time taken for an expanding shell to reach the size of a typical HI shell, the OB association may well lose its most luminous stars so the absence of such stars near the centres of many of the HI shells is well explained in this scenario.

  7. Gravitationally collapsing shells in (2+1) dimensions

    SciTech Connect (OSTI)

    Mann, Robert B.; Oh, John J.

    2006-12-15

    We study gravitationally collapsing models of pressureless dust, fluids with pressure, and the generalized Chaplygin gas (GCG) shell in (2+1)-dimensional spacetimes. Various collapse scenarios are investigated under a variety of the background configurations such as anti-de Sitter (AdS) black hole, de Sitter (dS) space, flat and AdS space with a conical deficit. As with the case of a disk of dust, we find that the collapse of a dust shell coincides with the Oppenheimer-Snyder type collapse to a black hole provided the initial density is sufficiently large. We also find - for all types of shell - that collapse to a naked singularity is possible under a broad variety of initial conditions. For shells with pressure this singularity can occur for a finite radius of the shell. We also find that GCG shells exhibit diverse collapse scenarios, which can be easily demonstrated by an effective potential analysis.

  8. Fossil shell emission in dying radio loud AGNs

    E-Print Network [OSTI]

    Kino, M; Kawakatu, N; Orienti, M; Nagai, H; Wajima, K; Itoh, R

    2015-01-01

    We investigate shell emission associated with dying radio loud AGNs. First, based on our recent work by Ito et al. (2015), we describe the dynamical and spectral evolutions of shells after stopping the jet energy injection. We find that the shell emission overwhelms that of the radio lobes soon after stopping the jet energy injection because fresh electrons are continuously supplied into the shell via the forward shock while the radio lobes rapidly fade out without jet energy injection. We find that such fossil shells can be a new class of target sources for SKA telescope. Next, we apply the model to the nearby radio source 3C84. Then, we find that the fossil shell emission in 3C84 is less luminous in radio band while it is bright in TeV gamma-ray band and it can be detectable by CTA.

  9. On the stability of thermonuclear shell sources in stars

    E-Print Network [OSTI]

    S. -C. Yoon; N. Langer; M. van der Sluys

    2004-06-07

    We present a quantitative criterion for the thermal stability of thermonuclear shell sources. We find the thermal stability of shell sources to depend on exactly three factors: they are more stable when they are geometrically thicker, less degenerate and hotter. This confirms and unifies previously obtained results in terms of the geometry, temperature and density of the shell source, by a simplified but quantitative approach to the physics of shell nuclear burning. We present instability diagrams in the temperature-density plane for hydrogen and helium shell burning, which allow a simple evaluation of the stability conditions of such shell sources in stellar models. The performance of our stability criterion is demonstrated in various numerical models: in a 3 Msun AGB star, in helium accreting CO white dwarfs, in a helium white dwarf which is covered by a thin hydrogen envelope, and in a 1.0 Msun giant.

  10. fed ad libitum until slaughter at 2 kg live weight, as either pellets, mash (60 p. 100 meal, 4o p. 100 water) or meal in a 2 X3factorial design with 4 replicates.

    E-Print Network [OSTI]

    Boyer, Edmond

    fed ad libitum until slaughter at 2 kg live weight, as either pellets, mash (60 p. 100 meal, 4o p week period for 8 M /D mash and meal diets were - 0.264 and — 6.218 g DI,G on 8 M /D pellets 12 M/D pellets, mash and meal were 33.10, 27.90 and z6.si g, respectively (SED ± 2.321 g

  11. Duality in Off-Shell Electromagnetism

    E-Print Network [OSTI]

    Martin Land

    2006-03-21

    In this paper, we examine the Dirac monopole in the framework of Off-Shell Electromagnetism, the five dimensional U(1) gauge theory associated with Stueckelberg-Schrodinger relativistic quantum theory. After reviewing the Dirac model in four dimensions, we show that the structure of the five dimensional theory prevents a natural generalization of the Dirac monopole, since the theory is not symmetric under duality transformations. It is shown that the duality symmetry can be restored by generalizing the electromagnetic field strength to an element of a Clifford algebra. Nevertheless, the generalized framework does not permit us to recover the phenomenological (or conventional) absence of magnetic monopoles.

  12. Mixed-Integer Programming Methods for Finding Nash Equilibria Tuomas Sandholm and Andrew Gilpin and Vincent Conitzer

    E-Print Network [OSTI]

    Mixed-Integer Programming Methods for Finding Nash Equilibria Tuomas Sandholm and Andrew Gilpin Nash equilibria in games (specifically, two-player normal form games). We study dif- ferent design dimensions of search algorithms that are based on those formulations. Our MIP Nash algorithm outperforms

  13. Flow Injection Analysis in a Microfluidic Format Andrew M. Leach, Aaron R. Wheeler, and Richard N. Zare*

    E-Print Network [OSTI]

    Zare, Richard N.

    Flow Injection Analysis in a Microfluidic Format Andrew M. Leach, Aaron R. Wheeler, and Richard N should be addressed email: zare@stanford.edu #12;2 ABSTRACT A microfluidic flow injection analysis system the operation of a standard six-port, two-way valve used in conventional liquid chromatography and flow

  14. AN ABSTRACT OF THE THESIS OF Andrew John Cihonski for the degree of Master of Science in

    E-Print Network [OSTI]

    Apte, Sourabh V.

    #12;AN ABSTRACT OF THE THESIS OF Andrew John Cihonski for the degree of Master of Science as particle #12;structuring. General agreement with previously published results is found and expounded upon for the degree of Master of Science Presented October 15, 2010 Commencement June 2011 #12;Master of Science

  15. Humidity Effects on PFPE Lubricant Bonding to a-CHx Ryan Z. Lei and Andrew J. Gellman*

    E-Print Network [OSTI]

    Gellman, Andrew J.

    Humidity Effects on PFPE Lubricant Bonding to a-CHx Overcoats Ryan Z. Lei and Andrew J. Gellman will place severe stress on the lubricant and overcoat used to protect the surfaces of magnetic media the lubricant-overcoat interactions become increasingly important to the tribological performance of the head

  16. NARROW AISLE MOBILE ROBOT NAVIGATION IN HAZARDOUS ENVIRONMENTS Thomas R. Collins, Andrew M. Henshaw Ronald C. Arkin

    E-Print Network [OSTI]

    in the semi-structured environment found in a hazardous waste storage facility, a sensor system should useNARROW AISLE MOBILE ROBOT NAVIGATION IN HAZARDOUS ENVIRONMENTS Thomas R. Collins, Andrew M. Henshaw it to a system more suitable for actual deployment on a robot. Routine monitoring of stored radioactive materials

  17. NARROW AISLE MOBILE ROBOT NAVIGATION IN HAZARDOUS ENVIRONMENTS Thomas R. Collins, Andrew M. Henshaw Ronald C. Arkin

    E-Print Network [OSTI]

    in the semi­structured environment found in a hazardous waste storage facility, a sensor system should useNARROW AISLE MOBILE ROBOT NAVIGATION IN HAZARDOUS ENVIRONMENTS Thomas R. Collins, Andrew M. Henshaw it to a system more suitable for actual deployment on a robot. Routine monitoring of stored radioactive materials

  18. Low-temperature magnetic properties of greigite (Fe3S4) Liao Chang and Andrew P. Roberts

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Low-temperature magnetic properties of greigite (Fe3S4) Liao Chang and Andrew P. Roberts National 115, Taiwan [1] We provide comprehensive low-temperature magnetic results for greigite (Fe3S4) across no low- temperature magnetic transitions, but we also document that it has strong domain-state dependence

  19. Terrestrial Carbon Cycle Dynamics under Recent and Future Climate Change H. DAMON MATTHEWS, ANDREW J. WEAVER, AND KATRIN J. MEISSNER

    E-Print Network [OSTI]

    Meissner, Katrin Juliane

    extensive research over the past several years, the uncertainty range on estimates of terrestrial carbonTerrestrial Carbon Cycle Dynamics under Recent and Future Climate Change H. DAMON MATTHEWS, ANDREW, Victoria, British Columbia, Canada (Manuscript received 18 June 2004, in final form 21 October 2004

  20. Desorption Kinetics and Energetics of Monodisperse Fomblin Zdol from Carbon Surfaces Kris R. Paserba and Andrew J. Gellman*

    E-Print Network [OSTI]

    Gellman, Andrew J.

    of graphite. Desorption is observed to occur molecularly through a first-order process with an energy barrier. Paserba and Andrew J. Gellman* Department of Chemical Engineering, Carnegie Mellon UniVersity, Pittsburgh of the mechanisms of lubricant loss from the surfaces of data storage media. This work has studied the desorption

  1. Library Tools Workshop for MATLS 4Z06 Andrew Colgoni / Services Librarian, Thode Library / colgoni@mcmaster.ca / Thode

    E-Print Network [OSTI]

    Thompson, Michael

    Library Tools Workshop for MATLS 4Z06 Andrew Colgoni / Services Librarian, Thode Library / colgoni for this Workshop: 1. Using the databases and tools listed above, find 3-5 articles/sources of information and other keywords for clues. 2. Export three of these references to a reference management tool of your

  2. Cleanroom: Edit-Time Error Detection with the Uniqueness Heuristic Andrew J. Ko and Jacob O. Wobbrock

    E-Print Network [OSTI]

    Wobbrock, Jacob O.

    Cleanroom: Edit-Time Error Detection with the Uniqueness Heuristic Andrew J. Ko and Jacob O for HTML, CSS, and JavaScript, in an interactive editor called Cleanroom, which highlights lone identifiers after each keystroke. Through an online experiment, we show that Cleanroom detects real errors

  3. Valuing Public Preferences for Offshore Wind Power Andrew D. Krueger, University of Delaware, College of Marine and Earth Studies

    E-Print Network [OSTI]

    Firestone, Jeremy

    Valuing Public Preferences for Offshore Wind Power Andrew D. Krueger, University of Delaware in Massachusetts, New York, Delaware, and Texas. For Delaware, offshore wind power is currently the only cost public opposition, regulatory obstacles, and lack of incentives. Table 1: Delaware Offshore Wind Power

  4. Conflict and Criterion Setting in Recognition Memory Tim Curran and Casey DeBuse P. Andrew Leynes

    E-Print Network [OSTI]

    Curran, Tim

    Conflict and Criterion Setting in Recognition Memory Tim Curran and Casey DeBuse P. Andrew Leynes) (Curran, 2000; Curran & Cleary, 2003; Nessler, Mecklinger, & affects remembering. For example, response, Wilding, & Rugg, 1998; Curran & Friedman, 2003; Cur- old­new effects are thought to reflect the activity

  5. Electrophoresis 1997, IR, 1259-1313 Predicted versus observed E. c d i proteins 1259 Andrew J. Link'*

    E-Print Network [OSTI]

    Church, George M.

    Electrophoresis 1997, IR, 1259-1313 Predicted versus observed E. c d i proteins 1259 Andrew J. Link Medical School, Boston, MA, USA Comparing the predicted and observed properties of proteins encoded proteins for their mature N-termini, in vivo abundances, isoelectric points, molecular masses, and cellular

  6. A Real Options Framework for Space Mission Design Andrew A. Gray, Payman Arabshahi, Elisabeth Lamassoure, Clayton Okino, Jason Andringa

    E-Print Network [OSTI]

    Arabshahi, Payman

    1 A Real Options Framework for Space Mission Design Andrew A. Gray, Payman Arabshahi, Elisabeth,payman,elama,okino, andringa}@jpl.nasa.gov Abstract--a real options framework for use in space mission design is presented that the flexibility provides; in this application the real options framework becomes a powerful tool. The utility

  7. Sensor Fusion for Improved Control of Piezoelectric Tube Scanners Andrew J. Fleming Adrian Wills S. O. Reza Moheimani

    E-Print Network [OSTI]

    Fleming, Andrew J.

    lateral deflection of the tube tip. Piezoelectric tubes are used extensively in applications requiring1 Sensor Fusion for Improved Control of Piezoelectric Tube Scanners Andrew J. Fleming Adrian Wills is augmented with the high dynamic sensitivity of piezoelectric transducers. By combining the low- frequency

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

    E-Print Network [OSTI]

    Romps, David M.

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

  9. DWE: Discriminating Word Enumerator Pavel Sumazin1, 2, Gengxin Chen1, Naoya Hata1, Andrew D. Smith1, Theresa

    E-Print Network [OSTI]

    DWE: Discriminating Word Enumerator Pavel Sumazin1, 2, Gengxin Chen1, Naoya Hata1, Andrew D. Smith1 regulation. Results: We describe a word-counting-based tool for de novo tissue-specific transcription regulation. We describe a discriminant word counting algorithm, Discriminant Word Enumerator (DWE), that can

  10. Parallax: Managing Storage for a Million Machines Andrew Warfield, Russ Ross, Keir Fraser, Christian Limpach, Steven Hand

    E-Print Network [OSTI]

    Hand, Steven

    Parallax: Managing Storage for a Million Machines Andrew Warfield, Russ Ross, Keir Fraser vir- tualization improves the utility, manageability, and scal- ability of large-scale environments, we believe that it is not sufficient in itself. In this paper we argue that the next key challenge

  11. Molding of Three-Dimensional Microstructures of Gels Min D. Tang, Andrew P. Golden, and Joe Tien*

    E-Print Network [OSTI]

    Tien, Joe

    Molding of Three-Dimensional Microstructures of Gels Min D. Tang, Andrew P. Golden, and Joe Tien for microfabrication of gels: the use of poly(dimethylsiloxane) (PDMS) stamps to mold, release, and stack gels into 3D structures, and the use of surface modification to promote the release or adhesion of molded gels

  12. Signs of sex: what we know and how Andrew M. Schurko, Maurine Neiman and John M. Logsdon Jr

    E-Print Network [OSTI]

    Neiman, Maurine

    Signs of sex: what we know and how we know it Andrew M. Schurko, Maurine Neiman and John M. Logsdon whether a lineage engages in sex is often complicated by the potential for cryptic sex, especially among-based approaches for recognizing signs of sex and describe their applications and relevance to evolutionary biology

  13. ACCUEIL > NUMRIQUE & INFORMATIQUE Le professeur Andrew Ellis pense que les tuyaux d'Internet seront bientt victimes

    E-Print Network [OSTI]

    Lefèvre, Laurent

    'Internet seront bientôt victimes d'embouteillages XXL provocant un blackout total. © DR SUR LE MÊME SUJET Internet Nouvelle France industrielle : le numérique est partout ! Un blackout d'Internet en 2023 ? 5 raisons de ne'Internet seront bientôt victimes d'embouteillages XXL provocant un blackout total. Le professeur Andrew Ellis

  14. Anisotropic Interfacial Free Energies of the Hard-Sphere Crystal-Melt Interfaces Yan Mu, Andrew Houk, and Xueyu Song*

    E-Print Network [OSTI]

    Song, Xueyu

    Anisotropic Interfacial Free Energies of the Hard-Sphere Crystal-Melt Interfaces Yan Mu, Andrew-melt interfacial free energy calculations using capillary wave approach. Using this method, we have calculated the free energies of the fcc crystal-melt interfaces for the hard-sphere system as a function of crystal

  15. On generation of jets for vector bundles Mauro C. Beltrametti, Sandra Di Rocco, and Andrew J. Sommese

    E-Print Network [OSTI]

    Sommese, Andrew J.

    On generation of jets for vector bundles Mauro C. Beltrametti, Sandra Di Rocco, and Andrew J. Sommese Abstract We introduce and study the k-jet ampleness and the k-jet spannedness for a vector bundle of such positivity properties for E . We compare the 1-jet ampleness with di#11;erent notions of very ampleness

  16. On generation of jets for vector bundles Mauro C. Beltrametti, Sandra Di Rocco, and Andrew J. Sommese

    E-Print Network [OSTI]

    Sommese, Andrew J.

    On generation of jets for vector bundles Mauro C. Beltrametti, Sandra Di Rocco, and Andrew J. Sommese Abstract We introduce and study the k-jet ampleness and the k-jet spannedness for a vector bundle, E, on a projective manifold. We obtain

  17. HiLight: Hiding Bits in Pixel Translucency Changes Tianxing Li, Chuankai An, Andrew T. Campbell, and Xia Zhou

    E-Print Network [OSTI]

    Campbell, Andrew T.

    Screen-camera link; Visible light communication 1. INTRODUCTION Screens (e.g. LED/OLED screensHiLight: Hiding Bits in Pixel Translucency Changes Tianxing Li, Chuankai An, Andrew T. Campbell}@cs.dartmouth.edu ABSTRACT We present HiLight, a new form of screen-camera communication without the need of any coded images

  18. Fast Yield-Driven Fracture for Variable Shaped-Beam Mask Andrew B. Kahng, Xu Xu and Alex Zelikovsky

    E-Print Network [OSTI]

    Zelikovsky, Alexander

    Fast Yield-Driven Fracture for Variable Shaped-Beam Mask Writing Andrew B. Kahng, Xu Xu and Alex process generation have collectively presented new challenges for current fracture tools, which-dimension errors. Some commercial tools are available for handling the sliver minimization problem in fracture

  19. Mechanical Stability of Cylindrical Thin-Shell Wormholes

    E-Print Network [OSTI]

    M. Sharif; M. Azam

    2013-08-07

    In this paper, we apply the cut and paste procedure to charged black string for the construction of thin-shell wormhole. We consider the Darmois-Israel formalism to determine the surface stresses of the shell. We take Chaplygin gas to deal with the matter distribution on shell. The radial perturbation approach (preserving the symmetry) is used to investigate the stability of static solutions. We conclude that stable static solutions exist both for uncharged and charged black string thin-shell wormholes for particular values of the parameters.

  20. On the Existence and Frequency Distribution of the Shell Primes

    E-Print Network [OSTI]

    Michael P. May

    2015-10-16

    This research introduces the results of a study on the existence and frequency distribution of the shell primes. Shell primes are defined herein as prime numbers that result from the calculation of the "half-shell" of an p-dimensional entity of the form n^p-(n-1)^p which has as its domain the realm of the positive integers for the base n. This research paper also presents the results of a non-sieving application of the Euler zeta function to the prime shell function n^p-(n-1)^p which has the capability to produce prime numbers when power p is prime.

  1. Written Statement of Peggy Montana, Shell Downstream Quadrennial...

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

    April 11. 2014 Good Morning. I am Peggy Montana, Executive Vice President, Pipelines and Special Projects, for Shell Downstream Inc. My previous role was EVP Supply...

  2. A thin-shell instability in collisionless plasma

    E-Print Network [OSTI]

    Dieckmann, M E; Doria, D; Sarri, G; Walder, R; Folini, D; Bret, A; Ynnerman, A; Borghesi, M

    2015-01-01

    The thin-shell instability has been named as one process, which can generate entangled structures in astrophysical plasma on collisional (fluid) scales. It is driven by a spatially varying imbalance between the ram pressure of the inflowing upstream plasma and the downstream's thermal pressure at a non-planar shock. Here we show by means of a particle-in-cell (PIC) simulation that an analogue process can destabilize a thin shell formed by two interpenetrating, unmagnetized and collisionless plasma clouds. The amplitude of the shell's spatial modulation grows and saturates after about ten inverse proton plasma frequencies, when the shell consists of connected piecewise linear patches.

  3. Offshore UK; Shell starts Galleon field pre-drilling

    SciTech Connect (OSTI)

    Not Available

    1993-01-01

    Shell U.K. Exploration and Production (Shell), acting as operator for a consortium of companies, has described plans for the two-phase development of Galleon gas field, located 50 miles from the Shell/Esso gas processing plant at Bacton, Norfolk, in 82 ft of water. The field has estimated reserves of 1.4 Tcf. Phase 1 development will cost [Brit pounds]300 million ($500 million); and first production is expected in late 1994. British Gas has agreed to purchase at least Phase 1 gas. Shell will be the operator for the development. A preliminary costsharing arrangement has been agreed to by the co-venturers to bridge the period until equities are determined. The consortium comprises Shell and Esso, with 40% each, and Conoco (U.K.) Ltd. and Oryx U.K. Energy Co., each with 10%. The field is located in Shell/Esso Blocks 48/14, 19a and 20a, and Conoco/Oryx Block 48/15a. Galleon will be the sixth gas field to be developed in the Southern North Sea by Shell, the operator for Shell and Esso. It will be the third field in the Sole Pit area, where total reserves found by Shell/Esso are about 3.0 Tcf.

  4. Ab Initio Coupled-Cluster Effective Interactions for the Shell...

    Office of Scientific and Technical Information (OSTI)

    Initio Coupled-Cluster Effective Interactions for the Shell Model: Application to Neutron-Rich Oxygen and Carbon Isotopes Citation Details In-Document Search Title: Ab Initio...

  5. Realistic Shell-Model Calculations for Nuclei in the Region of Shell Closures off Stability

    E-Print Network [OSTI]

    A. Covello; L. Coraggio; A. Gargano

    1998-07-24

    We have performed realistic shell-model calculations for nuclei around doubly magic 100Sn and 132Sn using an effective interaction derived from the Bonn A nucleon-nucleon potential. The results are in remarkably good agreement with the experimental data showing the ability of our effective interaction to provide an accurate description of nuclear structure properties.

  6. Hanford single-shell tank grouping study

    SciTech Connect (OSTI)

    Remund, K.M.; Anderson, C.M.; Simpson, B.C.

    1995-10-01

    A tank grouping study has been conducted to find Hanford single-shell tanks with similar waste properties. The limited sampling resources of the characterization program could be allocated more effectively by having a better understanding of the groups of tanks that have similar waste types. If meaningful groups of tanks can be identified, tank sampling requirements may be reduced, and the uncertainty of the characterization estimates may be narrowed. This tank grouping study considers the analytical sampling information and the historical information that is available for all single-shell tanks. The two primary sources of historical characterization estimates and information come from the Historical Tank Content Estimate (HTCE) Model and the Sort on Radioactive Waste Tanks (SORWT) Model. The sampling and historical information are used together to come up with meaningful groups of similar tanks. Based on the results of analyses presented in this report, credible tank grouping looks very promising. Some groups defined using historical information (HTCE and SORWT) correspond well with those based on analytical data alone.

  7. A Reconfigurable Fabric for Accelerating Large-Scale Datacenter Services Andrew Putnam Adrian M. Caulfield Eric S. Chung Derek Chiou1

    E-Print Network [OSTI]

    Hauck, Scott

    A Reconfigurable Fabric for Accelerating Large-Scale Datacenter Services Andrew Putnam Adrian M Microsoft Abstract Datacenter workloads demand high computational capabili- ties, flexibility, power limitations, has severe implications for datacenter operators, who have traditionally relied on consistent

  8. PURDUE UNIVERSITY ULTRAFAST OPTICS & OPTICAL FIBER COMMUNICATIONS LABORATORYA.M. Weiner Andrew M. Weiner, Jason McKinney*, and Shijun Xiao

    E-Print Network [OSTI]

    Purdue University

    PURDUE UNIVERSITY ULTRAFAST OPTICS & OPTICAL FIBER COMMUNICATIONS LABORATORYA.M. Weiner Andrew M affiliation: Naval Research Labs #12;PURDUE UNIVERSITY ULTRAFAST OPTICS & OPTICAL FIBER COMMUNICATIONS bandwidth #12;PURDUE UNIVERSITY ULTRAFAST OPTICS & OPTICAL FIBER COMMUNICATIONS LABORATORYA.M. Weiner

  9. Minutes of the Chancellor's Cabinet Meeting of Monday, February 24, 2014 Present: Les Johnson, Barbara Keinath, Peter Phaiah, Tricia Sanders, Andrew Svec, Fred Wood

    E-Print Network [OSTI]

    Minnesota, University of

    , Barbara Keinath, Peter Phaiah, Tricia Sanders, Andrew Svec, Fred Wood Meeting began at 8:30. I. Minutes high awareness of and build support for UMC's Wellness Center, Fred Wood is meeting tonight

  10. Monitoring underwater sensors with an amphibious robot Andrew Speers, Anna Topol, James Zacher, Robert Codd-Downey, Bart Verzijlenberg, Michael Jenkin

    E-Print Network [OSTI]

    Jenkin, Michael R. M.

    Monitoring underwater sensors with an amphibious robot Andrew Speers, Anna Topol, James Zacher, Toronto, Ontario, Canada M3J 1P3 (speers, topol, zacher, robert, bartv, jenkin)@cse.yorku.ca Abstract

  11. Wrinkling of Pressurized Elastic Shells Dominic Vella,1

    E-Print Network [OSTI]

    Vaziri, Ashkan

    the formation of localized structures formed by the point loading of an internally pressurized elastic shell that pressurized shells are subject to a wrinkling instability. We study wrinkling in depth, presenting scaling-pong player knows, objects with an intrinsic curvature suffer a surprising mode of instability in which

  12. Buckling Analysis of Axially Loaded Corrugated Cylindrical Shells

    E-Print Network [OSTI]

    Pellegrino, Sergio

    this issue, we have pro- posed an efficient computational method of predicting the onset of buckling shell structures. We have developed an efficient algorithm to perform our modified Bloch wave method and naval structures such as rocket and aircraft shells, ship panels, roof panels, cores of sandwich

  13. Application to Export Electric Energy OE Doc No. EA-339-A Shell...

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

    Application to Export Electric Energy OE Doc No. EA-339-A Shell Energy North America (US), L.P. Application from Shell Energy to export electric energy to Canada. EA-339-A Shell...

  14. G. Ei. Andrews, 'Al simple proof of Jacob'i's triple product ldenilty', Pro,c. Amer. Math{. Soc. 16 (1965), 333-:334.

    E-Print Network [OSTI]

    Garvan, Frank

    1965-01-01

    tAndl lAndll IA+61 tA+Hl lA+O'Bl TA+SD] tAtkI TC+SI References : G. Ei. Andrews, 'Al simple proof Soc. 18 (2) (1988). I G. Ei. Andrews anfl D. Hickerson, 'Rama,nuJan's 'lost' notebook VII: ther sixth883), 158-170t i [Gor] B. Gordon, 'sorrie identities ln combtnratorial analysis', Quart. J. Math. o

  15. HI shells in the Leiden/Argentina/Bonn HI survey

    E-Print Network [OSTI]

    Ehlerova, S

    2013-01-01

    We analyse the all-sky Leiden/Argentina/Bonn HI survey, where we identify shells belonging to the Milky Way. We used an identification method based on the search of continuous regions of a low brightness temperature that are compatible with given properties of HI shells. We found 333 shells in the whole Galaxy. The size distribution of shells in the outer Galaxy is fitted by a power law with the coefficient of 2.6 corresponding to the index 1.8 in the distribution of energy sources. Their surface density decreases exponentially with a scale length of 2.8 kpc. The surface density of shells with radii >= 100 pc in the solar neighbourhood is around 4 per kpc^2 and the 2D porosity is approximately 0.7.

  16. Dynamics of magnetic shells and information loss problem

    E-Print Network [OSTI]

    Bum-Hoon Lee; Wonwoo Lee; Dong-han Yeom

    2015-07-17

    We investigate dynamics of magnetic thin-shells in three dimensional anti de Sitter background. Because of the magnetic field, an oscillatory solution is possible. This oscillating shell can tunnel to a collapsing shell or a bouncing shell, where both of tunnelings induce an event horizon and a singularity. In the entire path integral, via the oscillating solution, there is a non-zero probability to maintain a trivial causal structure without a singularity. Therefore, due to the path integral, the entire wave function can conserve information. Since an oscillating shell can tunnel after a number of oscillations, in the end, it will allow an infinite number of different branchings to classical histories. This system can be a good model of the effective loss of information, where information is conserved by a solution that is originated from gauge fields.

  17. Process to make core-shell structured nanoparticles

    DOE Patents [OSTI]

    Luhrs, Claudia; Phillips, Jonathan; Richard, Monique N

    2014-01-07

    Disclosed is a process for making a composite material that contains core-shell structured nanoparticles. The process includes providing a precursor in the form of a powder a liquid and/or a vapor of a liquid that contains a core material and a shell material, and suspending the precursor in an aerosol gas to produce an aerosol containing the precursor. In addition, the process includes providing a plasma that has a hot zone and passing the aerosol through the hot zone of the plasma. As the aerosol passes through the hot zone of the plasma, at least part of the core material and at least part of the shell material in the aerosol is vaporized. Vapor that contains the core material and the shell material that has been vaporized is removed from the hot zone of the plasma and allowed to condense into core-shell structured nanoparticles.

  18. Method to produce large, uniform hollow spherical shells

    DOE Patents [OSTI]

    Hendricks, C.D.

    1983-09-26

    The invention is a method to produce large uniform hollow spherical shells by (1) forming uniform size drops of heat decomposable or vaporizable material, (2) evaporating the drops to form dried particles, (3) coating the dried particles with a layer of shell forming material and (4) heating the composite particles to melt the outer layer and to decompose or vaporize the inner particle to form an expanding inner gas bubble. The expanding gas bubble forms the molten outer layer into a shell of relatively large diameter. By cycling the temperature and pressure on the molten shell, nonuniformities in wall thickness can be reduced. The method of the invention is utilized to produce large uniform spherical shells, in the millimeter to centimeter diameter size range, from a variety of materials and of high quality, including sphericity, concentricity and surface smoothness, for use as laser fusion or other inertial confinement fusion targets as well as other applications.

  19. Stabilization of the resistive shell mode in tokamaks

    SciTech Connect (OSTI)

    Fitzpatrick, R.; Aydemir, A.

    1995-02-01

    The stability of current-driven external-kink modes is investigated in a tokamak plasma surrounded by an external shell of finite electrical conductivity. According to conventional theory, the ideal mode can be stabilized by placing the shell sufficiently close to the plasma, but the non-rotating ``resistive shell mode,`` which grows on the characteristic L/R time of the shell, always persists. It is demonstrated, using both analytic and numerical techniques, that a combination of strong edge plasma rotation and dissipation somewhere inside the plasma is capable of stabilizing the resistive shell mode. This stabilization mechanism does not necessarily depend on toroidicity or presence of resonant surfaces inside the plasma.

  20. Naked shell singularities on the brane

    SciTech Connect (OSTI)

    Seahra, Sanjeev S.

    2005-04-15

    By utilizing nonstandard slicings of 5-dimensional Schwarzschild and Schwarzschild-AdS manifolds based on isotropic coordinates, we generate static and spherically-symmetric braneworld spacetimes containing shell-like naked null singularities. For planar slicings, we find that the brane-matter sourcing the solution is a perfect fluid with an exotic equation of state and a pressure singularity where the brane crosses the bulk horizon. From a relativistic point of view, such a singularity is required to maintain matter infinitesimally above the surface of a black hole. From the point of view of the AdS/CFT conjecture, the singular horizon can be seen as one possible quantum correction to a classical black hole geometry. Various generalizations of planar slicings are also considered for a Ricci-flat bulk, and we find that singular horizons and exotic matter distributions are common features.

  1. Packing of elastic wires in flexible shells

    E-Print Network [OSTI]

    Vetter, Roman; Herrmann, Hans J

    2015-01-01

    The packing problem of long thin filaments that are injected into confined spaces is of fundamental interest for physicists, biologists and materials engineers alike. How linear threads pack and coil is well known only for the ideal case of rigid containers, however. Here, we force long elastic rods into flexible spatial confinement borne by an elastic shell to examine under which conditions recently acquired knowledge on wire packing in rigid spheres breaks down. We find that unlike in rigid cavities, friction plays a key role by giving rise to the emergence of two distinct packing patterns. At low friction, the wire densely coils into an ordered toroidal bundle with semi-ellipsoidal cross section, while at high friction, it packs into a highly disordered, self-similar structure. These two morphologies are shown to be separated by a continuous phase transition.

  2. Packing of elastic wires in flexible shells

    E-Print Network [OSTI]

    Roman Vetter; Falk K. Wittel; Hans J. Herrmann

    2015-04-03

    The packing problem of long thin filaments that are injected into confined spaces is of fundamental interest for physicists, biologists and materials engineers alike. How linear threads pack and coil is well known only for the ideal case of rigid containers, however. Here, we force long elastic rods into flexible spatial confinement borne by an elastic shell to examine under which conditions recently acquired knowledge on wire packing in rigid spheres breaks down. We find that unlike in rigid cavities, friction plays a key role by giving rise to the emergence of two distinct packing patterns. At low friction, the wire densely coils into an ordered toroidal bundle with semi-ellipsoidal cross section, while at high friction, it packs into a highly disordered, self-similar structure. These two morphologies are shown to be separated by a continuous phase transition.

  3. Double Shell Tank (DST) Utilities Specification

    SciTech Connect (OSTI)

    SUSIENE, W.T.

    2000-04-27

    This specification establishes the performance requirements and provides the references to the requisite codes and standards to he applied during the design of the Double-Shell Tank (DST) Utilities Subsystems that support the first phase of waste feed delivery (WFD). The DST Utilities Subsystems provide electrical power, raw/potable water, and service/instrument air to the equipment and structures used to transfer low-activity waste (LAW) and high-level waste (HLW) to designated DST staging tanks. The DST Utilities Subsystems also support the equipment and structures used to deliver blended LAW and HLW feed from these staging tanks to the River Protection Project (RPP) Privatization Contractor facility where the waste will be immobilized. This specification is intended to be the basis for new projects/installations. This specification is not intended to retroactively affect previously established project design criteria without specific direction by the program.

  4. Preparation of activated carbons from macadamia nut shell and coconut shell by air activation

    SciTech Connect (OSTI)

    Tam, M.S.; Antal, M.J. Jr.

    1999-11-01

    A novel, three-step process for the production of high-quality activated carbons from macadamia nut shell and coconut shell charcoals is described. In this process the charcoal is (1) heated to a high temperature (carbonized), (2) oxidized in air following a stepwise heating program from low (ca. 450 K) to high (ca. 660 K) temperatures (oxygenated), and (3) heated again in an inert environment to a high temperature (activated). By use of this procedure, activated carbons with surface areas greater than 1,000 m{sub 2}/g are manufactured with an overall yield of 15% (based on the dry shell feed). Removal of carbon mass by the development of mesopores and macropores is largely responsible for increases in the surface area of the carbons above 600 m{sub 2}/g. Thus, the surface area per gram of activated carbon can be represented by an inverse function of the yield for burnoffs between 15 and 60%. These findings are supported by mass-transfer calculations and pore-size distribution measurements. A kinetic model for gasification of carbon by oxygen, which provides for an Eley-Rideal type reaction of a surface oxide with oxygen in air, fits the measured gasification rates reasonably well over the temperature range of 550--660 K.

  5. Allison Andrews

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News Publications Traditional KnowledgeAgenda Agenda NERSCStrengthening the fightAllAllAllison

  6. Claudia Andrews

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAudits &BradburyMayARM-0501Classroom-presentations Sign In About |

  7. Thermodynamics of rotating thin shells in the BTZ spacetime

    E-Print Network [OSTI]

    Lemos, José P S; Minamitsuji, Masato; Rocha, Jorge V

    2015-01-01

    We investigate the thermodynamic equilibrium states of a rotating thin shell, i.e., a ring, in a (2+1)-dimensional spacetime with a negative cosmological constant. The inner and outer regions with respect to the shell are given by the vacuum anti-de Sitter (AdS) and the rotating Ba\\~{n}ados-Teitelbom-Zanelli (BTZ) spacetimes, respectively. The first law of thermodynamics on the thin shell, together with three equations of state for the pressure, the local inverse temperature and the thermodynamic angular velocity of the shell, yields the entropy of the shell, which is shown to depend only on its gravitational radii. When the shell is pushed to its own gravitational radius and its temperature is taken to be the Hawking temperature of the corresponding black hole, the entropy of the shell coincides with the Bekenstein-Hawking entropy. In addition, we consider simple ans\\"atze for the equations of state, as well as a power-law equation of state where the entropy and the thermodynamic stability conditions can be ...

  8. Spherical cloaking using multilayer shells of ordinary dielectrics

    SciTech Connect (OSTI)

    Wang, Xiaohui; Chen, Fang; Semouchkina, Elena, E-mail: esemouch@mtu.edu [Department of Electrical and Computer Engineering, Michigan Technological University, Houghton, MI, 49931 (United States)] [Department of Electrical and Computer Engineering, Michigan Technological University, Houghton, MI, 49931 (United States)

    2013-11-15

    An approach for spherical cloaking using multilayer ordinary dielectric materials has been developed. The total scattering cross section (TSCS) of the spherical multilayer shell with metallic core was derived based on the Mie theory. The dielectric profile of the shell was optimized to minimize the TSCS of the cloaked target. The specific directions, at which the scattering could be practically eliminated, were detected. The influence of the target size and the dielectric material loss on the cloaking efficiency was analyzed. It was shown that the cloaking efficiency for larger targets could be improved by employing lossy materials in the shell.

  9. Energy transfers in shell models for MHD turbulence

    E-Print Network [OSTI]

    T. Lessinnes; M. K. Verma; D. Carati

    2008-07-31

    A systematic procedure to derive shell models for MHD turbulence is proposed. It takes into account the conservation of ideal quadratic invariants such as the total energy, the cross-helicity and the magnetic helicity as well as the conservation of the magnetic energy by the advection term in the induction equation. This approach also leads to simple expressions for the energy exchanges as well as to unambiguous definitions for the energy fluxes. When applied to the existing shell models with nonlinear interactions limited to the nearest neighbour shells, this procedure reproduces well known models but suggests a reinterpretation of the energy fluxes.

  10. SeaWinds Wind Retrieval Quality Assessment David G. Long, Andrew S . Fletcher, and David W. Draper

    E-Print Network [OSTI]

    Long, David G.

    SeaWinds Wind Retrieval Quality Assessment David G. Long, Andrew S . Fletcher, and David W. Draper.edu,fletchas@ee.byu.edu,draperd@ee.byu.edu 801-378-4884, FAX: 801-37a-6586 ABSTRACT The SeaWinds on QuikScat scatterometer is the first winds. In this paper we provide an assessment of the reliability of the SeaWinds ambiguity selection

  11. The H? profiles of Be shell stars

    SciTech Connect (OSTI)

    Silaj, J.; Jones, C. E.; Sigut, T. A. A.; Tycner, C.

    2014-11-01

    A new set of theoretical H? emission line profiles of Be stars has been computed using the code BERAY, which solves the transfer equation along a series of rays passing through the star+disk system, representing an improved treatment over earlier work done by the authors. The new profiles were compared with the previous work, and general trends (such as line profile shapes and correlations between line equivalent widths as a function of initial density ?{sub 0} and power law index n) were recovered. Additionally, BERAY was employed to model the spectra of eight well-known Be shell stars. Some degeneracy was found in the choice of model parameters, highlighting the need to employ alternate observables to constrain the models. However, the inclination angle of the model seemed relatively insensitive to the choices of other parameters, and we show that, with our models, only a very small range of inclination angles can adequately reproduce the observations. Five of our eight targets were found to have inclination angles of 70° or higher, and two more were found to have inclination angles of 67° and 65°. The observation of one target—4 Aquilae—could only be reproduced by models created at an inclination angle of approximately 45°.

  12. Scattering of infrared light by dielectric core-shell particles

    E-Print Network [OSTI]

    Thiessen, E; Heinisch, R L; Fehske, H

    2015-01-01

    We study the scattering of infrared light by small dielectric core-shell particles taking a sapphire sphere with a CaO core as an example. The extinction efficiency of such a particle shows two intense series of resonances attached, respectively, to in-phase and out-of-phase multipolar polarization-induced surface charges build-up, respectively, at the core-shell and the shell-vacuum interface. Both series, the character of the former may be labelled bonding and the character of the latter antibonding, give rise to anomalous scattering. For a given particle radius and filling factor the Poynting vector field shows therefore around two wave numbers the complex topology of this type of light scattering. Inside the particle the topology depends on the character of the resonance. The dissipation of energy inside the particle also reflects the core-shell structure. It depends on the resonance and shows strong spatial variations.

  13. String Gas Shells, their Dual Radiation and Hedgehog Signature Control

    E-Print Network [OSTI]

    E. I. Guendelman

    2009-03-12

    We search for spherically symmetric, stationary solutions with a string gas shell as a source. The requirement of a uniform newtonian potential, or constancy of the 00 component of the metric, implies the existence of a "dual" radiation, which we argue can be interpreted as representing the virtual quantum fluctuations that stabilize the shell. A string hedgehog can be introduced also into the solution. For zero or small hedgehog strength the string gas shell is of a regular nature, while the dual radiation is of a spacelike nature. For higher hedgehog strengths however the radiation "materializes" and becomes timelike while the string gas shell becomes space like. The significance of these solutions for the quantum theory is discussed.

  14. Lightlike shell solitons of extremal space-time film

    E-Print Network [OSTI]

    Chernitskii, Alexander A

    2015-01-01

    New exact solution class of Born -- Infeld type nonlinear scalar field model is obtained. The variational principle of this model has a specific form which is characteristic for extremal four-dimensional hypersurface or hyper film in five-dimensional space-time. Obtained solutions are singular solitons propagating with speed of light and having energy, momentum, and angular momentum which can be calculated for explicit conditions. The soliton singularity here is a moving two-dimensional surface or shell, where the model action density becomes zero. The lightlike soliton can have a set of tubelike shells with the appropriate cavities. A twisted lightlike soliton is considered. It is notable that its energy is proportional to its angular momentum in high-frequency approximation. A case with one tubelike cavity is considered. In this case the soliton shell is diffeomorphic to cylindrical surface with cuts by multifilar helix. The shell transverse size of the appropriate finite energy soliton can be converging to...

  15. Nonlinear analysis of smart composite plate and shell structures 

    E-Print Network [OSTI]

    Lee, Seung Joon

    2005-08-29

    Theoretical formulations, analytical solutions, and finite element solutions for laminated composite plate and shell structures with smart material laminae are presented in the study. A unified third-order shear deformation ...

  16. Shell trajectory measurements from direct-drive implosion experiments...

    Office of Scientific and Technical Information (OSTI)

    A technique to measure the shell trajectory in direct-drive inertial confinement fusion implosions is presented. The x-ray self emission of the target is measured with an...

  17. *Stylobates*: A shell-forming sea anemone (Coelenterata, Anthozoa, Actiniidae)

    E-Print Network [OSTI]

    Fautin, Daphne G.; Devaney, Dennis M.; Roth, Barry

    1980-10-01

    Anatomy and cnidae distinguish two species of deep-sea actinians that produce coiled, chitinous shells inhabited by hermit crabs of the genus *Parapagurus*. The actinian type species, *Stylobates aeneus*, first assigned to the Mollusca, occurs...

  18. Models for Self-Gravitating Photon Shells and Geons

    E-Print Network [OSTI]

    Andréasson, Håkan; Thaller, Maximilian

    2015-01-01

    We prove existence of spherically symmetric, static, self-gravitating photon shells as solutions to the massless Einstein-Vlasov system. The solutions are highly relativistic in the sense that the ratio $2m(r)/r$ is close to $8/9$, where $m(r)$ is the Hawking mass and $r$ is the area radius. In 1955 Wheeler constructed, by numerical means, so called idealized spherically symmetric geons, i.e. solutions of the Einstein-Maxwell equations for which the energy momentum tensor is spherically symmetric on a time average. The structure of these solutions is such that the electromagnetic field is confined to a thin shell for which the ratio $2m/r$ is close to $8/9$, i.e., the solutions are highly relativistic photon shells. The solutions presented in this work provide an alternative model for photon shells or idealized spherically symmetric geons.

  19. A cohesive approach to thin-shell fracture and fragmentation Fehmi Cirak a,*, Michael Ortiz b

    E-Print Network [OSTI]

    Ortiz, Michael

    A cohesive approach to thin-shell fracture and fragmentation Fehmi Cirak a,*, Michael Ortiz b-element method for the simulation of dynamic fracture and fragmentation of thin-shells. The shell is spatially discretized with subdivision shell elements and the fracture along the element edges is modeled

  20. Direct Evidence of Washing out of Nuclear Shell Effects

    E-Print Network [OSTI]

    Chaudhuri, A; Banerjee, K; Bhattacharya, S; Sadhukhan, Jhilam; Bhattacharya, C; Kundu, S; Meena, J K; Mukherjee, G; Pandey, R; Rana, T K; Roy, P; Roy, T; Srivastava, V; Bhattacharya, P

    2015-01-01

    Constraining excitation energy at which nuclear shell effect washes out has important implications on the production of super heavy elements and many other fields of nuclear physics research. We report the fission fragment mass distribution in alpha induced reaction on an actinide target for wide excitation range in close energy interval and show direct evidence that nuclear shell effect washes out at excitation energy ~40 MeV. Calculation shows that second peak of the ?fission barrier also vanishes around similar excitation energy.

  1. FABRICATION OF GAS-FILLED TUNGSTEN-COATED GLASS SHELLS

    SciTech Connect (OSTI)

    NIKROO,A; BAUGH,W; STEINMAN,D.A

    2003-06-01

    OAK-B135 Deuterium (D{sub 2}) filled glass shells coated with a high Z element are needed for high energy density (HED) experiments by researchers at Los Alamos National Laboratory. They report here on our initial attempt to produce such shells. Glass shells made using the drop tower technique were coated with gold, palladium or tungsten, or a mixture of two of these elements. It was found that gold and palladium coatings did not stick well to the glass and resulted in poor or delaminated films. Tungsten coatings resulted in films suitable for these targets. Bouncing of shells during coating resulted in uniform tungsten coatings, but the surface of such coatings were filled with small nodules. Proper agitation of shells using a tapping technique resulted in smooth films with minimal particulate contamination. For coating rates of {approx} 0.15 {micro}m/hr coatings with {approx} 2 nm RMS surface finish could be deposited. The surface roughness of coatings at higher rates, 0.7 {micro}m/hr, was considerably worse ({approx} 100 nm RMS). The columnar structure of the coatings allowed permeation filling of the tungsten coated glass shells with deuterium at 300 C.

  2. Fabrication of Gas-Filled Tungsten-Coated Glass Shells

    SciTech Connect (OSTI)

    Nikroo, A.; Baugh, W.; Steinman, D.A.

    2004-03-15

    Deuterium (D{sub 2}) filled glass shells coated with a high Z element are needed for high energy density (HED) experiments by researchers at Los Alamos National Laboratory. We report here on our initial attempt to produce such shells. Glass shells made using the drop tower technique were coated with gold, palladium or tungsten, or a mixture of two of these elements. It was found that gold and palladium coatings did not stick well to the glass and resulted in poor or delaminated films. Tungsten coatings resulted in films suitable for these targets. Bouncing of shells during coating resulted in uniform tungsten coatings, but the surface of such coatings were filled with small nodules. Proper agitation of shells using a tapping technique resulted in smooth films with minimal particulate contamination. For coating rates of {approx}0.15 {mu}m/hr coatings with {approx}2 nm RMS surface finish could be deposited. The surface roughness of coatings at higher rates, 0.7 {mu}m/hr, was considerably worse ({approx}100 nm RMS). The columnar structure of the coatings allowed permeation filling of the tungsten coated glass shells with deuterium at 300 deg. C.

  3. Synthesis of pH-responsive core-shell nanoparticles of different sizes and with different shell compositions

    E-Print Network [OSTI]

    Pellegrino, Jason S

    2008-01-01

    The endosome-disrupting and pH-responsive poly(2-diethylamino ethyl methacrylate)-core/poly(2- aminoethyl methacrylate)-shell nanoparticles could potentially increase the efficacy of transcutaneous administered vaccines ...

  4. MEE 452: Example 3-2 ShellShell--andand--Tube Heat Exchanger Analysis:Tube Heat Exchanger Analysis

    E-Print Network [OSTI]

    Kostic, Milivoje M.

    MEE 452: Example 3-2 ShellShell--andand--Tube Heat Exchanger Analysis:Tube Heat Exchanger Analysis-butyl alcohol @150oF. Two-tube-pass for illustration only COUNTER FLOW T PARALLEL FLOW T Heat Exchanger/c,out or 16/Re otherwise Tube-side Pressure drop ... MathCAD S&T HX analysis 7 of 7 Tube-side Pressure drop

  5. Geometrically controlled snapping transitions in shells with curved creases

    E-Print Network [OSTI]

    Nakul P. Bende; Arthur A. Evans; Sarah Innes-Gold; Luis A. Marin; Itai Cohen; Ryan C. Hayward; Christian D. Santangelo

    2014-10-26

    Curvature and mechanics are intimately connected for thin materials, and this coupling between geometry and physical properties is readily seen in folded structures from intestinal villi and pollen grains, to wrinkled membranes and programmable metamaterials. While the well-known rules and mechanisms behind folding a flat surface have been used to create deployable structures and shape transformable materials, folding of curved shells is still not fundamentally understood. Curved shells naturally deform by simultaneously bending and stretching, and while this coupling gives them great stability for engineering applications, it makes folding a surface of arbitrary curvature a non-trivial task. Here we discuss the geometry of folding a creased shell, and demonstrate theoretically the conditions under which it may fold continuously. When these conditions are violated we show, using experiments and simulations, that shells undergo rapid snapping motion to fold from one stable configuration to another. Although material asymmetry is a proven mechanism for creating this bifurcation of stability, for the case of a creased shell, the inherent geometry itself serves as a barrier to folding. We discuss here how two fundamental geometric concepts, creases and curvature, combine to allow rapid transitions from one stable state to another. Independent of material system and length scale, the design rule that we introduce here explains how to generate snapping transitions in arbitrary surfaces, thus facilitating the creation of programmable multi-stable materials with fast actuation capabilities.

  6. Waltzing route towards double-helix formation in cholesteric shells

    E-Print Network [OSTI]

    Alexandre Darmon; Michael Benzaquen; Olivier Dauchot; Teresa Lopez-Leon

    2015-12-18

    We study cholesteric order in liquid crystal shells with planar degenerate anchoring. We observe that the bipolar and radial configurations intensively reported for bulk droplets have a higher degree of complexity when the liquid crystal is confined to a spherical shell. The bipolar configuration is replaced by a structure where the boojums are linked to a stack of disclination rings that spans the shell, while the radial configuration exhibits a double helix structure where two disclinations wind around each other. Our results confirm recent numerical simulations and highlight the complexity of the defect structures arising when cholesteric liquid crystals are confined to spherical geometries. We also show that the position of the boojums is only ruled by the shell geometry, independently of the cholesteric pitch. To understand quantitatively this behavior, we develop a simple yet insightful theoretical framework which captures the essence of the observed phenomenology. We also show that the transition between the two configurations is solely governed by the confinement ratio c = h/p, where h is the average shell thickness and p is the cholesteric pitch. Finally, we perform a dynamical study of this transition, and report a fascinating defect waltz due to a chemical Lehmann effect.

  7. Importance-Truncated Large-Scale Shell Model

    E-Print Network [OSTI]

    Stumpf, Christina; Roth, Robert

    2015-01-01

    We propose an importance-truncation scheme for the large-scale nuclear shell model that extends its range of applicability to larger valence spaces and mid-shell nuclei. It is based on a perturbative measure for the importance of individual basis states that acts as an additional truncation for the many-body model space in which the eigenvalue problem of the Hamiltonian is solved numerically. Through a posteriori extrapolations of all observables to vanishing importance threshold, the full shell-model results can be recovered. In addition to simple threshold extrapolations, we explore extrapolations based on the energy variance. We apply the importance-truncated shell model for the study of 56-Ni in the pf valence space and of 60-Zn and 64-Ge in the pfg9/2 space. We demonstrate the efficiency and accuracy of the approach, which pave the way for future shell-model calculations in larger valence spaces with valence-space interactions derived in ab initio approaches.

  8. Optimizing High-Z Coatings for Inertial Fusion Energy Shells

    SciTech Connect (OSTI)

    Stephens, Elizabeth H.; Nikroo, Abbas; Goodin, Daniel T.; Petzoldt, Ronald W.

    2003-05-15

    Inertial fusion energy (IFE) reactors require shells with a high-Z coating that is both permeable, for timely filling with deuterium-tritium, and reflective, for survival in the chamber. Previously, gold was deposited on shells while they were agitated to obtain uniform, reproducible coatings. However, these coatings were rather impermeable, resulting in unacceptably long fill times. We report here on an initial study on Pd coatings on shells in the same manner. We have found that these palladium-coated shells are substantially more permeable than gold. Pd coatings on shells remained stable on exposure to deuterium. Pd coatings had lower reflectivity compared to gold that leads to a lower working temperature, and efficiency, of the proposed fusion reactor. Seeking to combine the permeability of Pd coatings and high reflectivity of gold, AuPd-alloy coatings were produced using a cosputtering technique. These alloys demonstrated higher permeability than Au and higher reflectivity than Pd. However, these coatings were still less reflective than the gold coatings. To improve the permeability of gold's coatings, permeation experiments were performed at higher temperatures. With the parameters of composition, thickness, and temperature, we have the ability to comply with a large target design window.

  9. Shell Element Verification & Regression Problems for DYNA3D

    SciTech Connect (OSTI)

    Zywicz, E

    2008-02-01

    A series of quasi-static regression/verification problems were developed for the triangular and quadrilateral shell element formulations contained in Lawrence Livermore National Laboratory's explicit finite element program DYNA3D. Each regression problem imposes both displacement- and force-type boundary conditions to probe the five independent nodal degrees of freedom employed in the targeted formulation. When applicable, the finite element results are compared with small-strain linear-elastic closed-form reference solutions to verify select aspects of the formulations implementation. Although all problems in the suite depict the same geometry, material behavior, and loading conditions, each problem represents a unique combination of shell formulation, stabilization method, and integration rule. Collectively, the thirty-six new regression problems in the test suite cover nine different shell formulations, three hourglass stabilization methods, and three families of through-thickness integration rules.

  10. Shell Model and Mean-Field Description of Band Termination

    E-Print Network [OSTI]

    M. Zalewski; W. Satula; W. Nazarewicz; G. Stoitcheva; H. Zdunczuk

    2007-01-09

    We study nuclear high-spin states undergoing the transition to the fully stretched configuration with maximum angular momentum I_max within the space of valence nucleons. To this end, we perform a systematic theoretical analysis of non-fully-stretched I_max-2 and I_max-1 f_{7/2}^n seniority isomers and d_{3/2}^{-1} f_{7/2}^{n+1} intruder states in the A~44 nuclei from the lower-fp shell. We employ two theoretical approaches: (i) the density functional theory based on the cranked self-consistent Skyrme-Hartree-Fock method, and (ii) the nuclear shell model in the full sdfp configuration space allowing for 1p-1h cross-shell excitations. We emphasize the importance of restoration of broken angular momentum symmetry inherently obscuring the mean-field treatment of high-spin states. Overall good agreement with experimental data is obtained.

  11. Performance requirements for the single-shell tank

    SciTech Connect (OSTI)

    GRENARD, C.E.

    1999-09-22

    This document provides performance requirements for the waste storage and waste feed delivery functions of the Single-Shell Tank (SST) System. The requirements presented here in will be used as a basis for evaluating the ability of the system to complete the single-shell tank waste feed delivery mission. They will also be used to select the technology or technologies for retrieving waste from the tanks selected for the single-shell tank waste feed delivery mission, assumed to be 241-C-102 and 241-C-104. This revision of the Performance Requirements for the SST is based on the findings of the SST Functional Analysis, and are reflected in the current System Specification for the SST System.

  12. Summary compilation of shell element performance versus formulation.

    SciTech Connect (OSTI)

    Heinstein, Martin Wilhelm; Hales, Jason Dean; Breivik, Nicole L.; Key, Samuel W.

    2011-07-01

    This document compares the finite element shell formulations in the Sierra Solid Mechanics code. These are finite elements either currently in the Sierra simulation codes Presto and Adagio, or expected to be added to them in time. The list of elements are divided into traditional two-dimensional, plane stress shell finite elements, and three-dimensional solid finite elements that contain either modifications or additional terms designed to represent the bending stiffness expected to be found in shell formulations. These particular finite elements are formulated for finite deformation and inelastic material response, and, as such, are not based on some of the elegant formulations that can be found in an elastic, infinitesimal finite element setting. Each shell element is subjected to a series of 12 verification and validation test problems. The underlying purpose of the tests here is to identify the quality of both the spatially discrete finite element gradient operator and the spatially discrete finite element divergence operator. If the derivation of the finite element is proper, the discrete divergence operator is the transpose of the discrete gradient operator. An overall summary is provided from which one can rank, at least in an average sense, how well the individual formulations can be expected to perform in applications encountered year in and year out. A letter grade has been assigned albeit sometimes subjectively for each shell element and each test problem result. The number of A's, B's, C's, et cetera assigned have been totaled, and a grade point average (GPA) has been computed, based on a 4.0-system. These grades, combined with a comparison between the test problems and the application problem, can be used to guide an analyst to select the element with the best shell formulation.

  13. Coulomb excitations for a short linear chain of metallic shells

    SciTech Connect (OSTI)

    Zhemchuzhna, Liubov; Gumbs, Godfrey; Iurov, Andrii; Huang, Danhong; Gao, Bo

    2015-03-15

    A self-consistent-field theory is given for the electronic collective modes of a chain containing a finite number, N, of Coulomb-coupled spherical two-dimensional electron gases arranged with their centers along a straight line, for simulating electromagnetic response of a narrow-ribbon of metallic shells. The separation between nearest-neighbor shells is arbitrary and because of the quantization of the electron energy levels due to their confinement to the spherical surface, all angular momenta L of the Coulomb excitations, as well as their projections M on the quantization axis, are coupled. However, for incoming light with a given polarization, only one angular momentum quantum number is usually required. Therefore, the electromagnetic response of the narrow-ribbon of metallic shells is expected to be controlled externally by selecting different polarizations for incident light. We show that, when N?=?3, the next-nearest-neighbor Coulomb coupling is larger than its value if they are located at opposite ends of a right-angle triangle forming the triad. Additionally, the frequencies of the plasma excitations are found to depend on the orientation of the line joining them with respect to the axis of quantization since the magnetic field generated from the induced oscillating electric dipole moment on one sphere can couple to the induced magnetic dipole moment on another. Although the transverse inter-shell electromagnetic coupling can be modeled by an effective dynamic medium, the longitudinal inter-shell Coulomb coupling, on the other hand, can still significantly modify the electromagnetic property of this effective medium between shells.

  14. An improved shell of revolution element utilizing cubic displacement functions 

    E-Print Network [OSTI]

    Mebane, Paul Mitchell

    1970-01-01

    GZ Gt /12 ideni';y matrix; monent of inertia harmonic number number of P harmonics = stiffness matrix for an element constant factor ", or each harmonic stiffness matrix for an l. ment in shell coordinates meridional length of shell el ment... cannot be achi eved. 7 Fxclusion of a constant strain state may he due to the dis- placement function not being "complete". A compl te function may be thought of as an nt!i order polynomial . Functio, v!hich in- cludes all terms of the ord r n...

  15. Lithium Intercalation in Core-Shell Materials-Theoretical Analysis

    SciTech Connect (OSTI)

    Suthar, B; Subramanian, VR

    2014-03-04

    Core-shell composite structures are potential candidates for Li-ion battery electrodes as they can take advantage of materials with higher energy density and materials with higher cyclability. This paper derives an analytical solution for isotropic 1-dimensional diffusion with galvanostatic boundary condition in composite slab, cylinder and sphere using separation of variables method. A general interfacial condition has been used to represent the dynamics at the interface of the composite material rendering the solution useful for wide variety of battery materials. Using the derived analytical solution for diffusion, intercalation induced stresses were estimated for spherical core-shell materials. (C) 2014 The Electrochemical Society. All rights reserved.

  16. Shell trajectory measurements from direct-drive implosion experiments

    SciTech Connect (OSTI)

    Michel, D. T.; Sorce, C.; Epstein, R.; Whiting, N.; Igumenshchev, I. V.; Jungquist, R.; Froula, D. H. [Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14636 (United States)

    2012-10-15

    A technique to measure the shell trajectory in direct-drive inertial confinement fusion implosions is presented. The x-ray self emission of the target is measured with an x-ray framing camera. Optimized filtering limits the x-ray emission from the corona plasma, isolating a sharp intensity gradient very near the ablation surface. This enables one to measure the radius of the imploding shell with an accuracy better than 1 {mu}m and to determine a 200-ps average velocity to better than 2%.

  17. Overview of Hanford Single Shell Tank (SST) Structural Integrity

    SciTech Connect (OSTI)

    Rast, Richard S.; Washenfelder, Dennis J.; Johnson, Jeremy M.

    2013-11-14

    To improve the understanding of the single-shell tanks (SSTs) integrity, Washington River Protection Solutions, LLC (WRPS), the USDOE Hanford Site tank contractor, developed an enhanced Single-Shell Tank Integrity Project (SSTIP) in 2009. An expert panel on SST integrity, consisting of various subject matters experts in industry and academia, was created to provide recommendations supporting the development of the project. This panel developed 33 recommendations in four main areas of interest: structural integrity, liner degradation, leak integrity and prevention, and mitigation of contamination migration, Seventeen of these recommendations were used to develop the basis for the M-45-10-1 Change Package for the Hanford Federal Agreement and Compliance Order, which is also known as the Tri-Party Agreement. The structural integrity of the tanks is a key element in completing the cleanup mission at the Hanford Site. There are eight primary recommendations related to the structural integrity of Hanford Single-Shell Tanks. Six recommendations are being implemented through current and planned activities. The structural integrity of the Hanford is being evaluated through analysis, monitoring, inspection, materials testing, and construction document review. Structural evaluation in the form of analysis is performed using modern finite element models generated in ANSYS. The analyses consider in-situ, thermal, operating loads and natural phenomena such as earthquakes. Structural analysis of 108 of 149 Hanford Single-Shell Tanks has concluded that the tanks are structurally sound and meet current industry standards. Analysis of the remaining Hanford Single-Shell Tanks is scheduled for FY2014. Hanford Single-Shell Tanks are monitored through a dome deflection program. The program looks for deflections of the tank dome greater than 1/4 inch. No such deflections have been recorded. The tanks are also subjected to visual inspection. Digital cameras record the interior surface of the concrete tanks, looking for cracks and other surface conditions that may indicate signs of structural distress. The condition of the concrete and rebar of the Hanford Single-Shell Tanks is currently being tested and planned for additional activities in the near future. Concrete and rebar removed from the dome of a 65 year old tank was tested for mechanics properties and condition. Results indicated stronger than designed concrete with additional Petrographic examination and rebar completed. Material properties determined from previous efforts combined with current testing and construction document review will help to generate a database that will provide indication of Hanford Single-Shell Tank structural integrity.

  18. Double K-shell photoionization of atomic beryllium

    SciTech Connect (OSTI)

    Yip, F. L. [Departamento de Quimica, Modulo 13, Universidad Autonoma de Madrid, E-28049 Madrid (Spain); Martin, F. [Departamento de Quimica, Modulo 13, Universidad Autonoma de Madrid, E-28049 Madrid (Spain); Instituto Madrilen (tilde sign)o de Estudios Avanzados en Nanociencia, Cantoblanco, E-28049 Madrid (Spain); McCurdy, C. W. [Department of Chemistry, University of California, Davis, California 95616 (United States); Lawrence Berkeley National Laboratory, Chemical Sciences, and Ultrafast X-ray Science Laboratory, Berkeley, California 94720 (United States); Rescigno, T. N. [Lawrence Berkeley National Laboratory, Chemical Sciences, and Ultrafast X-ray Science Laboratory, Berkeley, California 94720 (United States)

    2011-11-15

    Double photoionization of the core 1s electrons in atomic beryllium is theoretically studied using a hybrid approach that combines orbital and grid-based representations of the Hamiltonian. The {sup 1} S ground state and {sup 1} P final state contain a double occupancy of the 2s valence shell in all configurations used to represent the correlated wave function. Triply differential cross sections are evaluated, with particular attention focused on a comparison of the effects of scattering the ejected electrons through the spherically symmetric valence shell with similar cross sections for helium, representing a purely two-electron target with an analogous initial-state configuration.

  19. Single-shell tank retrieval program mission analysis report

    SciTech Connect (OSTI)

    Stokes, W.J.

    1998-08-11

    This Mission Analysis Report was prepared to provide the foundation for the Single-Shell Tank (SST) Retrieval Program, a new program responsible for waste removal for the SSTS. The SST Retrieval Program is integrated with other Tank Waste Remediation System activities that provide the management, technical, and operations elements associated with planning and execution of SST and SST Farm retrieval and closure. This Mission Analysis Report provides the basis and strategy for developing a program plan for SST retrieval. This Mission Analysis Report responds to a US Department of Energy request for an alternative single-shell tank retrieval approach (Taylor 1997).

  20. Construction, Startup and Operation of a New LLRW Disposal Facility in Andrews County, Texas - 12151

    SciTech Connect (OSTI)

    Van Vliet, James A. [Waste Control Specialists LLC, Andrews County, Texas (United States)

    2012-07-01

    During this last year, Waste Control Specialists LLC (WCS) completed construction and achieved start of operations of a new low level radioactive waste (LLRW) disposal facility in Andrews County Texas. Disposal operations are underway for commercial LLRW, and start up evolutions are in progress for disposal of Department of Energy (DOE) LLRW. The overall approach to construction and start up are presented as well as some of the more significant challenges and how they were addressed to achieve initial operations of the first new commercial low level radioactive waste disposal facility in more than 30 years. The WCS disposal facility consists of two LLRW disposal cells, one for Texas Compact waste, and a separate disposal cell for DOE waste. Both disposal cells have very robust and unique designs. The cells themselves are constructed entirely in very low permeability red bed clay. The cell liners include a 0.91 meter thick clay liner meeting unprecedented permeability limits, 0.3 meter thick reinforced concrete barriers, as well as the standard geo-synthetic liners. Actions taken to meet performance criteria and install these liners will be discussed. Consistent with this highly protective landfill design, WCS chose to install a zero discharge site water management system. The considerations behind the design and construction of this system will be presented. Other activities essential to successful start of LLRW disposal operations included process and procedure development and refinement, staffing and staff development, and training. Mock ups were built and used for important evolutions and functions. Consistent with the extensive regulation of LLRW operations, engagement with the Texas Commission on Environmental Quality (TCEQ) was continuous and highly interactive. This included daily activity conference calls, weekly coordination calls and numerous topical conference calls and meetings. TCEQ staff and consultants frequently observed specific construction evolutions, such as geological feature mapping of designated excavation faces, disposal cell clay liner installation, disposal cell concrete barrier construction, etc. (author)

  1. HANFORD DOUBLE SHELL TANK THERMAL AND SEISMIC PROJECT SEISMIC ANALYSIS OF HANFORD DOUBLE SHELL TANKS

    SciTech Connect (OSTI)

    MACKEY TC; RINKER MW; CARPENTER BG; HENDRIX C; ABATT FG

    2009-01-15

    M&D Professional Services, Inc. (M&D) is under subcontract to Pacific Northwest National Laboratories (PNNL) to perform seismic analysis of the Hanford Site Double-Shell Tanks (DSTs) in support of a project entitled Double-Shell Tank (DST) Integrity Project - DST Thermal and Seismic Analyses. The original scope of the project was to complete an up-to-date comprehensive analysis of record of the DST System at Hanford in support of Tri-Party Agreement Milestone M-48-14. The work described herein was performed in support of the seismic analysis of the DSTs. The thermal and operating loads analysis of the DSTs is documented in Rinker et al. (2004). Although Milestone M-48-14 has been met, Revision I is being issued to address external review comments with emphasis on changes in the modeling of anchor bolts connecting the concrete dome and the steel primary tank. The work statement provided to M&D (PNNL 2003) required that a nonlinear soil structure interaction (SSI) analysis be performed on the DSTs. The analysis is required to include the effects of sliding interfaces and fluid sloshing (fluid-structure interaction). SSI analysis has traditionally been treated by frequency domain computer codes such as SHAKE (Schnabel, et al. 1972) and SASSI (Lysmer et al. 1999a). Such frequency domain programs are limited to the analysis of linear systems. Because of the contact surfaces, the response of the DSTs to a seismic event is inherently nonlinear and consequently outside the range of applicability of the linear frequency domain programs. That is, the nonlinear response of the DSTs to seismic excitation requires the use of a time domain code. The capabilities and limitations of the commercial time domain codes ANSYS{reg_sign} and MSC Dytran{reg_sign} for performing seismic SSI analysis of the DSTs and the methodology required to perform the detailed seismic analysis of the DSTs has been addressed in Rinker et al (2006a). On the basis of the results reported in Rinker et al. (2006a), it is concluded that time-domain SSI analysis using ANSYS{reg_sign} is justified for predicting the global response of the DSTs. The most significant difference between the current revision (Revision 1) of this report and the original issue (Revision 0) is the treatment of the anchor bolts that tie the steel dome of the primary tank to the concrete tank dome.

  2. HANFORD DOUBLE SHELL TANK (DST) THERMAL & SEISMIC PROJECT SEISMIC ANALYSIS OF HANFORD DOUBLE SHELL TANKS

    SciTech Connect (OSTI)

    MACKEY, T.C.

    2006-03-17

    M&D Professional Services, Inc. (M&D) is under subcontract to Pacific Northwest National Laboratory (PNNL) to perform seismic analysis of the Hanford Site double-shell tanks (DSTs) in support of a project entitled ''Double-Shell Tank (DSV Integrity Project--DST Thermal and Seismic Analyses)''. The overall scope of the project is to complete an up-to-date comprehensive analysis of record of the DST system at Hanford in support of Tri-Party Agreement Milestone M-48-14, The work described herein was performed in support of the seismic analysis of the DSTs. The thermal and operating loads analysis of the DSTs is documented in Rinker et al. (2004). The work statement provided to M&D (PNNL 2003) required that the seismic analysis of the DSTs assess the impacts of potentially non-conservative assumptions in previous analyses and account for the additional soil mass due to the as-found soil density increase, the effects of material degradation, additional thermal profiles applied to the full structure including the soil-structure response with the footings, the non-rigid (low frequency) response of the tank roof, the asymmetric seismic-induced soil loading, the structural discontinuity between the concrete tank wall and the support footing and the sloshing of the tank waste. The seismic analysis considers the interaction of the tank with the surrounding soil and the effects of the primary tank contents. The DSTs and the surrounding soil are modeled as a system of finite elements. The depth and width of the soil incorporated into the analysis model are sufficient to obtain appropriately accurate analytical results. The analyses required to support the work statement differ from previous analysis of the DSTs in that the soil-structure interaction (SSI) model includes several (nonlinear) contact surfaces in the tank structure, and the contained waste must be modeled explicitly in order to capture the fluid-structure interaction behavior between the primary tank and contained waste.

  3. On a tensor-based finite element model for the analysis of shell structures 

    E-Print Network [OSTI]

    Arciniega Aleman, Roman Augusto

    2006-04-12

    In the present study, we propose a computational model for the linear and nonlinear analysis of shell structures. We consider a tensor-based finite element formulation which describes the mathematical shell model in a ...

  4. Quantitative EDS Analysis of Nanometer-Scale Core/Shell Pd/Rh...

    Office of Scientific and Technical Information (OSTI)

    Quantitative EDS Analysis of Nanometer-Scale CoreShell PdRh Structures. Citation Details In-Document Search Title: Quantitative EDS Analysis of Nanometer-Scale CoreShell PdRh...

  5. Comparison of direct plating versus filtering of egg shells inoculated with Salmonella typhimurium 

    E-Print Network [OSTI]

    Reynolds, Paige Lea

    2002-01-01

    Comparison of enumeration of egg shell bacterial load by a conventional direct plating method and a neoteric filtering method was evaluated. Egg shells were inoculated with approximately 10³ S. typhimurium organisms. Initial experiments evaluated...

  6. Portland cement mortar modified with latex and fiber glass for thin shell construction 

    E-Print Network [OSTI]

    Raymond, Jewell Duane

    1963-01-01

    owners. Thin shell construction began first in Italy and Spain, later spreading to the western hemisphere, notably Mexico. In the United States widespread application of thin shell roof construction has been hampered by the high cost of labor...

  7. Rigid-Plastic Approximations for Predicting Plastic Deformation of Cylindrical Shells Subject to Dynamic Loading

    E-Print Network [OSTI]

    Hoo Fatt, Michelle S.

    A theoretical approach was developed for predicting the plastic deformation of a cylindrical shell subject to asymmetric dynamic loads. The plastic deformation of the leading generator of the shell is found by solving for ...

  8. The effect of geometry and topology on the mechanics of grid shells

    E-Print Network [OSTI]

    Malek, Samar R. (Samar Rula)

    2012-01-01

    The use of grid shell structures in architecture and structural engineering has risen in the past decade, yet fundamental research on the mechanics of such structures is lacking. Grid shells are long span structures comprised ...

  9. Tss4U BV formerly Holecsol R S Renewable Energy Systems and Shell...

    Open Energy Info (EERE)

    and Shell Solar Energy Jump to: navigation, search Name: Tss4U BV (formerly Holecsol, R&S Renewable Energy Systems and Shell Solar Energy) Place: Veldhoven, Netherlands Zip:...

  10. Organized thiol functional groups in mesoporous core shell colloids

    SciTech Connect (OSTI)

    Marchena, Martin H.; Granada, Mara; Bordoni, Andrea V.; Joselevich, Maria; Troiani, Horacio; Williams, Federico J.; Wolosiuk, Alejandro

    2012-03-15

    The co-condensation in situ of tetraethoxysilane (TEOS) and mercaptopropyltrimethoxysilane (MPTMS) using cetyltrimethylammonium bromide (CTAB) as a template results in the synthesis of multilayered mesoporous structured SiO{sub 2} colloids with 'onion-like' chemical environments. Thiol groups were anchored to an inner selected SiO{sub 2} porous layer in a bilayered core shell particle producing different chemical regions inside the colloidal layered structure. X-Ray Photoelectron Spectroscopy (XPS) shows a preferential anchoring of the -SH groups in the double layer shell system, while porosimetry and simple chemical modifications confirm that pores are accessible. We can envision the synthesis of interesting colloidal objects with defined chemical environments with highly controlled properties. - Graphical abstract: Mesoporous core shell SiO{sub 2} colloids with organized thiol groups. Highlights: Black-Right-Pointing-Pointer Double shell mesoporous silica colloids templated with CTAB. Black-Right-Pointing-Pointer Sequential deposition of mesoporous SiO{sub 2} layers with different chemistries. Black-Right-Pointing-Pointer XPS shows the selective functionalization of mesoporous layers with thiol groups.

  11. Double Shell Tank AY-102 Radioactive Waste Leak Investigation

    SciTech Connect (OSTI)

    Washenfelder, Dennis J.

    2014-04-10

    PowerPoint. The objectives of this presentation are to: Describe Effort to Determine Whether Tank AY-102 Leaked; Review Probable Causes of the Tank AY-102 Leak; and, Discuss Influence of Leak on Hanford’s Double-Shell Tank Integrity Program.

  12. Mixer pump test plan for double shell tank AZ-101

    SciTech Connect (OSTI)

    STAEHR, T.W.

    1999-05-12

    Mixer pump systems have been chosen as the method for retrieval of tank wastes contained in double shell tanks at Hanford. This document describes the plan for testing and demonstrating the ability of two 300 hp mixer pumps to mobilize waste in tank AZ-101. The mixer pumps, equipment and instrumentation to monitor the test were installed by Project W-151.

  13. Measurements of Low Temperature Dielectronic Recombination in L-Shell

    E-Print Network [OSTI]

    Savin, Daniel Wolf

    , and radiative transfer effects. In CP547, Atomic Processes in Plasmas: Twelfth Topical Conf, edited by R. CMeasurements of Low Temperature Dielectronic Recombination in L-Shell Iron for Modeling X for these ions significantly affect our ability to model and inter- pret the line emission from observations

  14. Design and Test of Tube & Shell Heat Exchangers for Potential

    E-Print Network [OSTI]

    of double-tube heat exchangers #12;Company Logo Experimental apparatus Metal Type Ti SUS304 Al Cu Al 15m AlDesign and Test of Tube & Shell Heat Exchangers for Potential OTEC Application Jeong-Tae Kwon1 exchanger #12;Company Logo Cross-Counter -1 heat exchanger Cross-Counter -2 heat exchanger Double tube heat

  15. Chaos vs thermalization in the nuclear shell model

    SciTech Connect (OSTI)

    Horoi, M.; Zelevinsky, V.; Brown, B.A. [National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321 (United States)] [National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824-1321 (United States); [Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824-1116 (United States); [Institute of Atomic Physics, Bucharest (Romania); [Budker Institute of Nuclear Physics, Novosibirsk 630090 (Russian Federation)

    1995-06-26

    Generic signatures of quantum chaos found in realistic shell model calculations are compared with thermal statistical equilibrium. We show the similarity of the informational entropy of individual eigenfunctions in the mean-field basis to the thermodynamical entropy found from the level density. Mean occupation numbers of single-particle orbitals agree with the Fermi-Dirac distribution despite the strong nucleon interaction.

  16. CALCULATION OF THE NEUTRON NOISE INDUCED BY SHELL-MODE

    E-Print Network [OSTI]

    Demazière, Christophe

    CALCULATION OF THE NEUTRON NOISE INDUCED BY SHELL-MODE FISSION REACTORS CORE-BARREL VIBRATIONS-REGION SLAB REACTOR MODEL CARL SUNDE,* CHRISTOPHE DEMAZIÈRE, and IMRE PÁZSIT Chalmers University of Technology. 5 gives a self-contained description of the principles of fluctuation analysis for the diagnostics

  17. Fitting Single Particle Energies in $sdgh$ Major Shell

    E-Print Network [OSTI]

    E. Dikmen; O. Öztürk; Y. Cengiz

    2015-02-12

    We have performed two kinds of non-linear fitting procedures to the single-particle energies in the $sdgh$ major shell to obtain better shell model results. The low-lying energy eigenvalues of the light Sn isotopes with $A=103-110$ in the $sdgh$-shell are calculated in the framework of the nuclear shell model by using CD-Bonn two-body effective nucleon-nucleon interaction. The obtained energy eigenvalues are fitted to the corresponding experimental values by using two different non-linear fitting procedures, i.e., downhill simplex method and clonal selection method. The unknown single-particle energies of the states $2s_{1/2}$, $1d_{3/2}$, and $0h_{11/2}$ are used in the fitting methods to obtain better spectra of the $^{104,106,108,110}$Sn isotopes. We compare the energy spectra of the $^{104,106,108,110}$Sn and $^{103,105,107,109}$Sn isotopes with/without a nonlinear fit to the experimental results.

  18. Tri-axial Octupole Deformations and Shell Structure

    E-Print Network [OSTI]

    W. D. Heiss; R. G. Nazmitdinov; R. A. Lynch

    1999-04-28

    Manifestations of pronounced shell effects are discovered when adding nonaxial octupole deformations to a harmonic oscillator model. The degeneracies of the quantum spectra are in a good agreement with the corresponding main periodic orbits and winding number ratios which are found by classical analysis.

  19. Realistic shell-model calculations: current status and open problems

    E-Print Network [OSTI]

    A. Covello; A. Gargano

    2010-03-29

    The main steps involved in realistic shell-model calculations employing two-body low-momentum interactions are briefly reviewed. The practical value of this approach is exemplified by the results of recent calculations and some remaining open questions and directions for future research are discussed.

  20. Assembly of ordered carbon shells on semiconducting nanomaterials

    DOE Patents [OSTI]

    Sutter, Eli Anguelova; Sutter, Peter Werner

    2012-10-02

    In some embodiments of the invention, encapsulated semiconducting nanomaterials are described. In certain embodiments the nanostructures described are semiconducting nanomaterials encapsulated with ordered carbon shells. In some aspects a method for producing encapsulated semiconducting nanomaterials is disclosed. In some embodiments applications of encapsulated semiconducting nanomaterials are described.

  1. Single-shell tank interim stabilization project plan

    SciTech Connect (OSTI)

    Ross, W.E.

    1998-05-11

    This project plan establishes the management framework for conduct of the TWRS Single-Shell Tank Interim Stabilization completion program. Specifically, this plan defines the mission needs and requirements; technical objectives and approach; organizational structure, roles, responsibilities, and interfaces; and operational methods. This plan serves as the project executional baseline.

  2. Local and Global Casimir Energies for a Semitransparent Cylindrical Shell

    E-Print Network [OSTI]

    Milton, Kim

    Local and Global Casimir Energies for a Semitransparent Cylindrical Shell In´es Cavero-Pel´aez and Kimball A. Milton Oklahoma Center for High-Energy Physics and Homer L. Dodge Department of Physics University, Waco, TX 76798 (Dated: September 5, 2006) Abstract The local Casimir energy density

  3. Generation of Core/shell Nanoparticles with Laser Ablation 

    E-Print Network [OSTI]

    Jo, Young Kyong

    2012-10-19

    Two types of core/shell nanoparticles (CS-NPs) generation based on laser ablation are developed in this study, namely, double pulse laser ablation and laser ablation in colloidal solutions. In addition to the study of the generation mechanism of CS...

  4. Design Modelling Symposium Berlin 2013 FUNICULAR FUNNEL SHELLS

    E-Print Network [OSTI]

    Lygeros, John

    ABSTRACT This paper introduces a new typology of structurally efficient, funnel-shaped shells for light tension rings leads to a great variety of efficient and expressive forms. The research demonstrates how, the vertical parts (columns) and the horizontal parts (roof/ceiling) of these structures often merge into one

  5. A Cohesive Approach to Thin-Shell Fracture and Fragmentation

    E-Print Network [OSTI]

    Cirak, Fehmi

    A Cohesive Approach to Thin-Shell Fracture and Fragmentation Fehmi Cirak1 , Michael Ortiz2 and Anna 20133 Milano, Italy Abstract We develop a finite-element method for the simulation of dynamic fracture and the fracture along the element edges is modeled with a cohesive law. In order to follow the prop- agation

  6. POLYMER PROGRAM SEMINAR Folding gels and shells: Designing reconfigurable

    E-Print Network [OSTI]

    Alpay, S. Pamir

    POLYMER PROGRAM SEMINAR Folding gels and shells: Designing reconfigurable 3D shapes and `mechanical and reconfigurable 3D shapes and properties. In particular, we have studied the use of photo-crosslinkable polymer films to prepare polymer sheets and multilayers containing stimuli-responsive hydrogel elements

  7. RAMP BLUE: A MESSAGE-PASSING MANYCORE SYSTEM IN FPGAS Alex Krasnov, Andrew Schultz, John Wawrzynek, Greg Gibeling, Pierre-Yves Droz

    E-Print Network [OSTI]

    California at Irvine, University of

    RAMP BLUE: A MESSAGE-PASSING MANYCORE SYSTEM IN FPGAS Alex Krasnov, Andrew Schultz, John Wawrzynek of multi-core archi- tectures in FPGAs. RAMP Blue is the first of these pro- totypes and was designed of RAMP Blue and discuss our experiences and lessons learned. 1. INTRODUCTION Research Accelerator

  8. Laser Desorption/Ionization of Transition Metal Atoms and Oxides from Solid Argon Lester Andrews,*, Andreas Rohrbacher, Christopher M. Laperle, and Robert E. Continetti

    E-Print Network [OSTI]

    Continetti, Robert E.

    Laser Desorption/Ionization of Transition Metal Atoms and Oxides from Solid Argon Lester Andrews of the laser-ablated metal atoms and O2 in excess argon during condensation at 10 K, have been laser desorbed of organic acid typically used as a matrix in matrix- assisted laser desorption/ionization (MALDI) mass

  9. Metal MEMS Tools for Beating-heart Tissue Removal Andrew H. Gosline, Member, IEEE, Nikolay V. Vasilyev, Arun Veeramani, MingTing Wu, Greg Schmitz,

    E-Print Network [OSTI]

    Dupont, Pierre

    Metal MEMS Tools for Beating-heart Tissue Removal Andrew H. Gosline, Member, IEEE, Nikolay V. del Nido and Pierre E. Dupont, Fellow, IEEE Abstract-- A novel robotic tool is proposed to enable the surgical removal of tissue from inside the beating heart. The tool is manufactured using a unique metal

  10. CO2-Brine Surface Dissolution and Injection: CO2 Storage Enhancement Paul Emeka Eke, SPE, Mark Naylor, Stuart Haszeldine and Andrew Curtis, Scottish Centre for Carbon Storage,

    E-Print Network [OSTI]

    . The abstract must contain conspicuous acknowledgment of SPE copyright. Abstract Carbon capture and storage (CCS, Mark Naylor, Stuart Haszeldine and Andrew Curtis, Scottish Centre for Carbon Storage, School of Geo. The upward buoyancy of dense phase carbon dioxide (CO2) in deep reservoirs means that sites need to be chosen

  11. SAPSM: Smart Adaptive 802.11 PSM for Smartphones Andrew J. Pyles, Xin Qi, Gang Zhou, Matthew Keally and Xue Liu

    E-Print Network [OSTI]

    Zhou, Gang

    SAPSM: Smart Adaptive 802.11 PSM for Smartphones Andrew J. Pyles, Xin Qi, Gang Zhou, Matthew Keally. Copyright 2012 ACM 978-1-4503-1224-0/12/09...$10.00. times more power than Power Save Mode (PSM) when idle [1]. PSM consumes little power at the cost of added latency of up to 300ms. Latency can cause

  12. Webs in vitro and in vivo: spiders alter their orb-web spinning behavior in the laboratory Andrew Sensenig1,3

    E-Print Network [OSTI]

    Agnarsson, Ingi

    Webs in vitro and in vivo: spiders alter their orb-web spinning behavior in the laboratory Andrew of the elegant architectures of orb webs are conducted in controlled laboratory environments that remove in the wild is largely unknown. We compared web architecture and silk investment of furrowed orb weavers

  13. Enhanced adhesion with pedestal-shaped elastomeric stamps for transfer Seok Kim, Andrew Carlson, Huanyu Cheng, Seungwoo Lee, Jung-Ki Park et al.

    E-Print Network [OSTI]

    Rogers, John A.

    Enhanced adhesion with pedestal-shaped elastomeric stamps for transfer printing Seok Kim, Andrew://apl.aip.org/features/most_downloaded Information for Authors: http://apl.aip.org/authors #12;Enhanced adhesion with pedestal-shaped elastomeric for deterministic materials assembly via transfer printing. Experimental measurements of adhesion and finite element

  14. Biologically-Inspired Locomotion of a 2g Hexapod Robot Andrew T. Baisch, Student Member, IEEE, Pratheev S. Sreetharan, and Robert J. Wood, Member, IEEE

    E-Print Network [OSTI]

    Wood, Robert

    Biologically-Inspired Locomotion of a 2g Hexapod Robot Andrew T. Baisch, Student Member, IEEE-scale fabrication techniques, a 5.7cm hexapod robot with sprawled posture has been created, and is capable over rough terrain [2], and can scale vertical or in- verted surfaces [3]. Two fundamental hexapod

  15. A Text-to-Picture Synthesis System for Augmenting Communication Xiaojin Zhu, Andrew B. Goldberg, Mohamed Eldawy, Charles R. Dyer and Bradley Strock

    E-Print Network [OSTI]

    Zhu, Xiaojin "Jerry"

    A Text-to-Picture Synthesis System for Augmenting Communication Xiaojin Zhu, Andrew B. Goldberg Text-to-Picture system that synthe- sizes a picture from general, unrestricted natural lan- guage text image parts conditioned on the text, and finally optimiz- ing the picture layout conditioned on both

  16. GEOC Andrew Stack Wednesday, March 19, 2014 131 Multiscale assessment of the kinetics and mechanisms of metal(loid) oxidation at the Mnoxide/water interface

    E-Print Network [OSTI]

    Sparks, Donald L.

    GEOC Andrew Stack Wednesday, March 19, 2014 131 Multiscale assessment of the kinetics in terrestrial and aquatic environments are powerful oxidants of contaminants such as As and Cr. While numerous studies have appeared on the kinetics of As(III) and Cr(III) oxidation on manganese oxides, the mechanisms

  17. Mesoscale Predictability of an Extreme Warm-Season Precipitation Event FUQING ZHANG, ANDREW M. ODINS, AND JOHN W. NIELSEN-GAMMON

    E-Print Network [OSTI]

    Mesoscale Predictability of an Extreme Warm-Season Precipitation Event FUQING ZHANG, ANDREW M Station, Texas (Manuscript received 22 November 2004, in final form 28 August 2005) ABSTRACT A mesoscale model is used to investigate the mesoscale predictability of an extreme precipitation event over central

  18. Mixed-Symmetry Shell-Model Calculations in Nuclear Physics

    E-Print Network [OSTI]

    V. G. Gueorguiev

    2010-02-17

    We consider a novel approach to the nuclear shell model. The one-dimensional harmonic oscillator in a box is used to introduce the concept of an oblique-basis shell-model theory. By implementing the Lanczos method for diagonalization of large matrices, and the Cholesky algorithm for solving generalized eigenvalue problems, the method is applied to nuclei. The mixed-symmetry basis combines traditional spherical shell-model states with SU(3) collective configurations. We test the validity of this mixed-symmetry scheme on 24Mg and 44Ti. Results for 24Mg, obtained using the Wilthental USD intersection in a space that spans less than 10% of the full-space, reproduce the binding energy within 2% as well as an accurate reproduction of the low-energy spectrum and the structure of the states - 90% overlap with the exact eigenstates. In contrast, for an m-scheme calculation, one needs about 60% of the full space to obtain compatible results. Calculations for 44Ti support the mixed-mode scheme although the pure SU(3) calculations with few irreps are not as good as the standard m-scheme calculations. The strong breaking of the SU(3) symmetry results in relatively small enhancements within the combined basis. However, an oblique-basis calculation in 50% of the full pf-shell space is as good as a usual m-scheme calculation in 80% of the space. Results for the lower pf-shell nuclei 44-48Ti and 48Cr, using the Kuo-Brown-3 interaction, show that SU(3) symmetry breaking in this region is driven by the single-particle spin-orbit splitting. In our study we observe some interesting coherent structures, such as coherent mixing of basis states, quasi-perturbative behavior in the toy model, and enhanced B(E2) strengths close to the SU(3) limit even though SU(3) appears to be rather badly broken.

  19. Industrial mixing techniques for Hanford double-shell tanks

    SciTech Connect (OSTI)

    Daymo, E.A.

    1997-09-01

    Jet mixer pumps are currently the baseline technology for sludge mobilization and mixing in one-million gallon double-shell tanks at the Hanford and Savannah River Sites. Improvements to the baseline jet mixer pump technology are sought because jet mixer pumps have moving parts that may fail or require maintenance. Moreover, jet mixers are relatively expensive, they heat the waste, and, in some cases, may not mobilize enough of the sludge. This report documents a thorough literature search for commercially available applicable mixing technologies that could be used for double-shell tank sludge mobilization and mixing. Textbooks, research articles, conference proceedings, mixing experts, and the Thomas Register were consulted to identify applicable technologies. While there are many commercial methods that could be used to mobilize sludge or mix the contents of a one-million gallon tank, few will work given the geometrical constraints (e.g., the mixer must fit through a 1.07-m-diameter riser) or the tank waste properties (e.g., the sludge has such a high yield stress that it generally does not flow under its own weight). Pulsed fluid jets and submersible Flygt mixers have already been identified at Hanford and Savannah River Sites for double-shell tank mixing applications. While these mixing technologies may not be applicable for double-shell tanks that have a thick sludge layer at the bottom (since too many of these mixers would need to be installed to mobilize most of the sludge), they may have applications in tanks that do not have a settled solids layer. Retrieval projects at Hanford and other U.S. Department of Energy sites are currently evaluating the effectiveness of these mixing techniques for tank waste applications. The literature search did not reveal any previously unknown technologies that should be considered for sludge mobilization and mixing in one-million gallon double-shell tanks.

  20. Shell-instability generated waves by low energy electrons on converging magnetic field lines

    E-Print Network [OSTI]

    California at Berkeley, University of

    Shell-instability generated waves by low energy electrons on converging magnetic field lines D that the shell-instability can generate electrostatic and electromagnetic wave modes: whistler waves, electron´cre´au (2006), Shell-instability generated waves by low energy electrons on converging magnetic field lines

  1. Energy transfer in nanowire solar cells with photon-harvesting shells C. H. Peters,a

    E-Print Network [OSTI]

    McGehee, Michael

    Energy transfer in nanowire solar cells with photon-harvesting shells C. H. Peters,a A. R. Guichard; published online 23 June 2009 The concept of a nanowire solar cell with photon-harvesting shells are bonded to the surface of the SiNWs forming a thin shell. They absorb the low-energy photons

  2. Photoelectrochemical Behavior of Hierarchically Structured Si/WO3 Core-Shell Tandem Photoanodes

    E-Print Network [OSTI]

    Braun, Paul

    Photoelectrochemical Behavior of Hierarchically Structured Si/WO3 Core-Shell Tandem Photoanodes 61801, United States *S Supporting Information ABSTRACT: WO3 thin films have been deposited and the shells consisting of a controlled morphology WO3 layer. Porosity was introduced into the WO3 outer shell

  3. Open-Shell Singlet Character of Stable Derivatives of Nonacene, Hexacene and Teranthene

    SciTech Connect (OSTI)

    Gao, Xingfa; Jiang, Deen; Zhang, Prof. Shengbai; Chen, Zhongfang; Miller, Glen; Hodgson, Jennifer

    2011-01-01

    The electronic ground states of the recently synthesized stable nonacene derivatives (J. Am. Chem. Soc.2010, 132, 1261) are open-shell singlets with a polyradical nature instead of closed-shell singlets as originally assumed, according to the unrestricted broken spin-symmetry density functional theory (UBS-DFT) computations (at B3LYP/6-31G*). It is the bulky protecting groups, not the transfer from the open-shell singlet to closed-shell singlet ground state, that stabilizes these longest characterized acenes. Similar analyses also confirmed the open-shell singlet character of the hexacene and teranthene derivatives.

  4. Detailed diagnosis of a double-shell collision under realistic implosion conditions

    SciTech Connect (OSTI)

    Kyrala, G.A.; Gunderson, M.A.; Delamater, N.D.; Haynes, D.A.; Wilson, D.C.; Guzik, J.A.; Klare, K.A. [Los Alamos National Laboratory, P.O. Box 1663, MS E-526, Los Alamos, New Mexico 87544 (United States)

    2006-05-15

    Double-shell implosions provide a noncryogenic path to inertial confinement fusion. In the double-shell target, the energy is absorbed in an outer shell that is accelerated inward and collides with an inner shell that implodes against the deuterium fuel. Symmetric collision of the shells requires that the shells be illuminated and built symmetrically. In reality, the targets are complicated and the construction is not symmetric, due to the seam that our current assembly method requires. Using the Omega laser [R. T. Boehly et al., Opt. Comm. 133, 495 (1997)], an illumination strategy was designed that uses 40 beams in an offset geometry, leaving 20 beams to perform radiography from two different directions. This places a significant nonsymmetric illumination challenge that may not exist in final targets shot on the National Ignition Facility. This paper presents a measurement of the time history of a collision of two shells in a double-shell capsule, briefly reviews the illumination geometry, gives the results of the measurements of the trajectory and symmetry of the outer and inner shells, shows the effect of a seam on the inner shell implosion, and compares the results with calculations. The measurement of such a collision in a spherical geometry is of great interest to the study of double-shell implosions as well as code validation.

  5. Gravitational collapse of thin shells of dust in Shape Dynamics

    E-Print Network [OSTI]

    Gomes, Henrique; Mercati, Flavio; Napoletano, Andrea

    2015-01-01

    Shape dynamics is a theory of gravity whose physical configuration space is composed of spatial conformal equivalence classes of 3-dimensional geometries. This physical configuration space is not a priori related to the one given by 4-dimensional space-time geometries, familiar to general relativists. Although one can largely match dynamical solutions arising in each theory, this is not always the case. One expects such differences in collapse situations that lead to the formation of black holes. In this paper we study spherical collapse of thin-shells of pressureless dust as a fully back-reacting dynamical system, in a context related to both shape dynamics and general relativity in ADM form in Constant Mean Curvature (CMC) gauge -- the particular time slicing where any correspondence between ADM and shape dynamics is manifest. To better accommodate the relational setting of shape dynamics, we also begin a study of collapse of two such shells in a compact Universe.

  6. Nuclear Level Density: Shell Model vs Mean Field

    E-Print Network [OSTI]

    Sen'kov, Roman

    2015-01-01

    The knowledge of the nuclear level density is necessary for understanding various reactions including those in the stellar environment. Usually the combinatorics of Fermi-gas plus pairing is used for finding the level density. Recently a practical algorithm avoiding diagonalization of huge matrices was developed for calculating the density of many-body nuclear energy levels with certain quantum numbers for a full shell-model Hamiltonian. The underlying physics is that of quantum chaos and intrinsic thermalization in a closed system of interacting particles. We briefly explain this algorithm and, when possible, demonstrate the agreement of the results with those derived from exact diagonalization. The resulting level density is much smoother than that coming from the conventional mean-field combinatorics. We study the role of various components of residual interactions in the process of thermalization, stressing the influence of incoherent collision-like processes. The shell-model results for the traditionally...

  7. STAR FORMATION AROUND SUPERGIANT SHELLS IN THE LARGE MAGELLANIC CLOUD

    SciTech Connect (OSTI)

    Book, Laura G.; Chu Youhua; Gruendl, Robert A.; Fukui, Yasuo

    2009-03-15

    We examine the recent star formation associated with four supergiant shells in the Large Magellanic Cloud (LMC): LMC 1, 4, 5, and 6, which have been shown to have simple expanding-shell structures. H II regions and OB associations are used to infer star formation in the last few Myr, while massive young stellar objects reveal the current ongoing star formation. Distributions of ionized H I and molecular components of the interstellar gas are compared with the sites of recent and current star formation to determine whether triggering has taken place. We find that a great majority of the current star formation has occurred in gravitationally unstable regions, and that evidence of triggered star formation is prevalent at both large and local scales.

  8. Horizonless, singularity-free, compact shells satisfying NEC

    E-Print Network [OSTI]

    Shankar, Karthik H

    2015-01-01

    Gravitational collapse singularities are undesirable, yet inevitable to a large extent in General Relativity. When matter satisfying null energy condition collapses to the extent a closed trapped surface is formed, a singularity is inevitable according to Penrose's singularity theorem. Since positive mass vacuum solutions are generally black holes with trapped surfaces inside the event horizon, matter cannot collapse to an arbitrarily small size without generating a singularity. However, in modified theories of gravity where positive mass vacuum solutions are naked singularities with no trapped surfaces, it is reasonable to expect that matter can collapse to an arbitrarily small size without generating a singularity. Here we examine this possibility in the context of a modified theory of gravity with torsion in an extra dimension. We study singularity-free static shell solutions to evaluate the validity of the null energy condition on the shell. We find that with sufficiently high pressure, matter can be coll...

  9. Optimal thermalization in a shell model of homogeneous turbulence

    E-Print Network [OSTI]

    Thalabard, Simon

    2015-01-01

    We investigate the turbulence-induced dissipation of the large scales in a statistically homogeneous flow using an "optimal closure," which one of us (BT) has recently exposed in the context of Hamiltonian dynamics. This statistical closure employs a Gaussian model for the turbulent scales, with corresponding vanishing third cumulant, and yet it captures an intrinsic damping. The key to this apparent paradox lies in a clear distinction between true ensemble averages and their proxies, most easily grasped when one works directly with the Liouville equation rather than the cumulant hierarchy. We focus on a simple problem for which the optimal closure can be fully and exactly worked out: the relaxation arbitrarily far-from-equilibrium of a single energy shell towards Gibbs equilibrium in an inviscid shell model of 3D turbulence. The predictions of the optimal closure are validated against DNS and contrasted with those derived from EDQNM closure.

  10. Mechanism of magnetism in stacked nanographite with open shell electrons

    E-Print Network [OSTI]

    Kikuo Harigaya; Toshiaki Enoki

    2001-10-23

    Antiferromagnetism in stacked nanographite is investigated with using the Hubbard-type models. The A-B stacking or the stacking near to that of A-B type is favorable for the hexagonal nanographite with zigzag edges, in order that magnetism appears. Next, we find that the open shell electronic structure can be an origin of the decreasing magnetic moment with the decrease of the inter-graphene distance, as experiments on adsorption of molecules suggest.

  11. Improved Grades and Consumer Demand for In-Shell Pecans. 

    E-Print Network [OSTI]

    Brison, Fred R.; Branson, Robert E.; Clark, Wayne W.; Krezdorn, A. H.; Storey, J. B.

    1959-01-01

    Grade Index for Pecans. ............ Kernel Percentage ........................ Kernel Quality Index. ...................... Kernel Size Index. .......................... Nut Defects. ................................. 8 Comparison of Proposed Grade...-SHELL PECANS FRED R. BRISON, ROBERT E. BRANSON, WAYNE W. CLARK, A. H. KREZDORN and J. B. STOREY* I HE AVERAGE ANNUAL U. S. PECAN CROP for are available from February through Septem- T the 10-year period ending with 1956 was ber. Other nuts often are offered...

  12. Coupling Extraction From Off-Shell Cross-sections

    E-Print Network [OSTI]

    Baradhwaj Coleppa; Tanumoy Mandal; Subhadip Mitra

    2014-10-09

    In this note, we present a novel method of extracting the couplings of a new heavy particle to the Standard Model states. Contrary to the usual discovery process which involves studying the on-shell production, we look at regions away from resonance to take advantage of the simple scaling of the cross-section with the couplings. We apply the procedure to the case of a heavy quark as an illustration.

  13. Lightlike shell solitons of extremal space-time film

    E-Print Network [OSTI]

    Alexander A. Chernitskii

    2015-10-22

    New exact solution class of Born -- Infeld type nonlinear scalar field model is obtained. The variational principle of this model has a specific form which is characteristic for extremal four-dimensional hypersurface or hyper film in five-dimensional space-time. Obtained solutions are singular solitons propagating with speed of light and having energy, momentum, and angular momentum which can be calculated for explicit conditions. The soliton singularity has a form of moving two-dimensional surface or shell. The lightlike soliton can have a set of tubelike singular shells with the appropriate cavities. A twisted lightlike soliton is considered. It is notable that its energy is proportional to its angular momentum in high-frequency approximation. A case with one tubelike cavity is considered. In this case the soliton shell is diffeomorphic to cylindrical surface with cuts by multifilar helix. The shell transverse size of the appropriate finite energy soliton can be converging to zero at infinity. The ideal gas of such lightlike solitons with minimal twist parameter is considered in a finite volume. Explicit conditions provide that the angular momentum of each soliton in the volume equals Planck constant. The equilibrium energy spectral density for the solitons is obtained. It has the form of Planck distribution in some approximation. A beam of twisted lightlike solitons is considered. The representation of arbitrary polarization for beam with twisted lightlike solitons is discussed. It is shown that this beam provides the effect of mechanical angular momentum transfer to absorbent by circularly polarized beam. This effect well known for photon beam. Thus the soliton solution which have determinate likeness with photon is obtained in particular.

  14. Realistic Shell-Model Calculations for 208Pb Neighbors

    E-Print Network [OSTI]

    L. Coraggio; A. Covello; A. Gargano

    1998-12-17

    We have performed a shell-model study of the two nuclei 210Po and 206Hg, having and lacking two protons with respect to doubly magic 208Pb. In our calculations we have employed realistic effective interactions derived from the Bonn A nucleon-nucleon potential. The calculated results are compared with the available experimental data are, however, very scanty for 206Hg. The very good agreement obtained for 210Po supports confidence in our predictions for 206Hg.

  15. Tritium emissions from 200 East Area Double-Shell Tanks

    SciTech Connect (OSTI)

    Bachand, D.D.

    1994-11-28

    This document evaluates the need for tritium sampling of the emissions from the 200 East Area Double Shell Tanks based on the requirements of {open_quotes}National Emission Standards for Hazardous Air Pollutants{close_quotes} (NESHAP). The NESHAP requirements are specified in 40 Code of Federal Regulation (CFR), Part 61, Subpart H; {open_quotes}National Emission Standards for Emissions of Radionuclides Other than Radon from Department of Energy Facilities{close_quotes}.

  16. Stability of thin-shell interfaces inside compact stars

    E-Print Network [OSTI]

    Jonas P. Pereira; Jaziel G. Coelho; Jorge A. Rueda

    2015-01-05

    We use the thin-shell Darmois-Israel formalism to model and assess the stability of the interfaces separating phases, e.g. the core and the crust, within compact stars. We exemplify the relevance and non-triviality of this treatment in the simplest case of an incompressible star, in constant pressure phase transitions, and in the case of strange quark stars with crust.

  17. Suitable thin shell structural configurations for earth sheltered housing

    SciTech Connect (OSTI)

    Behr, R.A.

    1982-01-01

    An earth sheltered house is one whose building envelope is substantially in contact with soil, without necessarily being totally underground. Hence, it can provide the commonly sought attributes of a residence, including natural light, exterior views, and curb appeal. It also exhibits strong energy performance, lower maintenance, and good storm protection. Despite the longer-term life cycle cost advantages of earth sheltered buildings, a current hindrance to the mass market acceptance of earth sheltered housing is higher initial cost which is caused, in part, by the inability of conventional rectilinear structural systems to support economically the massive soil loads imposed on earth covered buildings. In deference to the premise that technical suitability is no guarantee of innovation acceptance in the housing industry, a survey of the nontechnical impediments to housing innovation was first undertaken. These impediment areas include: market inhibition; builder trepidations; industry constraints; and financing problems. As a result of an architectural design program written under contract for the Department of Energy, it was possible to include a rather extensive (but necessarily subjective) evaluation of the architectural potential for earth sheltered shell structures. Engineering suitability dimensions included structural effectiveness, constructability, and economy of construction for single- and double-curvature thin shell structures. Overall engineering suitability and architectural potential are deemed to be adequate, although non-engineering impediments to housing innovation appear to raise significant questions regarding the potential for mass market implementation of thin shell stuctures in earth sheltered housing.

  18. Local and Global Casimir Energies for a Semitransparent Cylindrical Shell

    E-Print Network [OSTI]

    Ines Cavero-Pelaez; Kimball A. Milton; Klaus Kirsten

    2006-09-07

    The local Casimir energy density and the global Casimir energy for a massless scalar field associated with a $\\lambda\\delta$-function potential in a 3+1 dimensional circular cylindrical geometry are considered. The global energy is examined for both weak and strong coupling, the latter being the well-studied Dirichlet cylinder case. For weak-coupling,through $\\mathcal{O}(\\lambda^2)$, the total energy is shown to vanish by both analytic and numerical arguments, based both on Green's-function and zeta-function techniques. Divergences occurring in the calculation are shown to be absorbable by renormalization of physical parameters of the model. The global energy may be obtained by integrating the local energy density only when the latter is supplemented by an energy term residing precisely on the surface of the cylinder. The latter is identified as the integrated local energy density of the cylindrical shell when the latter is physically expanded to have finite thickness. Inside and outside the delta-function shell, the local energy density diverges as the surface of the shell is approached; the divergence is weakest when the conformal stress tensor is used to define the energy density. A real global divergence first occurs in $\\mathcal{O}(\\lambda^3)$, as anticipated, but the proof is supplied here for the first time; this divergence is entirely associated with the surface energy, and does {\\em not} reflect divergences in the local energy density as the surface is approached.

  19. Stabilization of external kink modes in magnetic fusion experiments using a thin conducting shell

    SciTech Connect (OSTI)

    Fitzpatrick, R.

    1995-11-01

    In nearly all magnetic fusion devices the plasma is surrounded by a conducting shell of some description. In most cases this is the vacuum vessel. What effect does a conducting shell have on the stability of external kink modes? Is there any major difference between the effect of a perfectly conducting shell and a shell of finite conductivity? What happens if the shell is incomplete? These, and other, questions are explored in detail in this lecture using simple resistive magnetohydrodynamic (resistive MHD) arguments. Although the lecture concentrates on one particular type of magnetic fusion device, namely, the tokamak, the analysis is fairly general and could also be used to examine the effect of conducting shells on other types of device (e.g. Reversed Field Pinches, Stellerators, etc.).

  20. Intern experience at Shell Western E&P, Inc.: an internship report 

    E-Print Network [OSTI]

    Obioha, Obioha Mackena, 1959-

    2013-03-13

    * SHELL OIL IS A UNITED STATES OPERATING ARM OF THE GROUP The Dutch and British parents hold interest on 60:40 basis in the Group which, in outline, consists of: ? Group holding companies, namely Shell Petroleum NV and the Shell Petroleum Company... MACKENA OBIOHA Submitted to the College of Engineering of Texas A&M University partial fulfillment of the requirements for the degree DOCTOR OF ENGINEERING MAY 1987 Major Subject: Petroleum Engineering An Internship Report by Obioha Mackena Obioha...

  1. Shell structure of potassium isotopes deduced from their magnetic moments

    E-Print Network [OSTI]

    J. Papuga; M. L. Bissell; K. Kreim; C. Barbieri; K. Blaum; M. De Rydt; T. Duguet; R. F. Garcia Ruiz; H. Heylen; M. Kowalska; R. Neugart; G. Neyens; W. Nortershauser; M. M. Rajabali; R. Sanchez; N. Smirnova; V. Soma; D. T. Yordanov

    2014-10-03

    \\item[Background] Ground-state spins and magnetic moments are sensitive to the nuclear wave function, thus they are powerful probes to study the nuclear structure of isotopes far from stability. \\item[Purpose] Extend our knowledge about the evolution of the $1/2^+$ and $3/2^+$ states for K isotopes beyond the $N = 28$ shell gap. \\item[Method] High-resolution collinear laser spectroscopy on bunched atomic beams. \\item[Results] From measured hyperfine structure spectra of K isotopes, nuclear spins and magnetic moments of the ground states were obtained for isotopes from $N = 19$ up to $N = 32$. In order to draw conclusions about the composition of the wave functions and the occupation of the levels, the experimental data were compared to shell-model calculations using SDPF-NR and SDPF-U effective interactions. In addition, a detailed discussion about the evolution of the gap between proton $1d_{3/2}$ and $2s_{1/2}$ in the shell model and {\\it{ab initio}} framework is also presented. \\item[Conclusions] The dominant component of the wave function for the odd-$A$ isotopes up to $^{45}$K is a $\\pi 1d_{3/2}^{-1}$ hole. For $^{47,49}$K, the main component originates from a $\\pi 2s_{1/2}^{-1}$ hole configuration and it inverts back to the $\\pi 1d_{3/2}^{-1}$ in $^{51}$K. For all even-$A$ isotopes, the dominant configuration arises from a $\\pi 1d_{3/2}^{-1}$ hole coupled to a neutron in the $\

  2. Induced color in ostracode shells: an experimental study

    E-Print Network [OSTI]

    Kontrovitz, M.; Ainsworth, N. R.; Burnett, R. D.; Slack, J. M.

    1992-08-01

    /1 and 5Y 7/2, which are both named light gray even though 5YR 7/ 1 is redder and the less color saturated of the two. It is suggested that the reader will find it useful to have the color and name charts at hand while reading this paper. Shells were placed... on a Munsell standard, gray masking card and viewed through a Wild M-5 binocular, stereo- microscope set at a magnification of 20X. The stage was illuminated by two American Optical model 651 lamps, each set at intensity level 2, about 15 cm from...

  3. The peculiar dust shell of Nova DZ Cru (2003).

    SciTech Connect (OSTI)

    Evans, A.; Gehrz, R. D.; Woodward, C. E.; Helton, L. A.; Rushton, M. T.; Bode, M. F.; Krautter, J.; Lyke, J.; Lynch, D. K.; Ness, J.-U.; Starrfield, S.; Truran, J. W.; Wagner, R. M.; Physics; Keele Univ.; Univ. of Minnesota; Univ. of Central Lancashire; Liverpool John Moores Univ.; Zentrum fur Astronomie der Univ. Heidelberg; M. W. Keck Observatory; The Aerospace Corp.; European Space Astronomy Centre; Arizona State Univ.; Univ. of Chicago; Large Binocular Telscope Observatory

    2010-01-01

    We present Spitzer Space Telescope observations of the 'peculiar variable' DZ Cru, identified by Rushton et al. as a classical nova. A dust shell, on which are superimposed a number of features, is prominent in the 5-35 {micro}m range some 4 yr after eruption. We suggest that the dust in DZ Cru is primarily hydrogenated amorphous carbon in which aliphatic bands currently predominate and which may become either predominantly aromatic as the dust is photoprocessed by ultraviolet radiation from the stellar remnant or more likely completely destroyed.

  4. FLAMMABLE GAS DIFFUSION THROUGH SINGLE SHELL TANK (SST) DOMES

    SciTech Connect (OSTI)

    MEACHAM, J.E.

    2003-11-10

    This report quantified potential hydrogen diffusion through Hanford Site Single-Shell tank (SST) domes if the SSTs were hypothetically sealed airtight. Results showed that diffusion would keep headspace flammable gas concentrations below the lower flammability limit in the 241-AX and 241-SX SST. The purpose of this document is to quantify the amount of hydrogen that could diffuse through the domes of the SSTs if they were hypothetically sealed airtight. Diffusion is assumed to be the only mechanism available to reduce flammable gas concentrations. The scope of this report is limited to the 149 SSTs.

  5. Fifteenth international conference on X-ray and inner-shell processes

    SciTech Connect (OSTI)

    Not Available

    1990-01-01

    This document is composed of Abstracts from invited papers presented at X-90, the fifteenth annual international conference on x-ray and Inner-Shell Processes. (FSD)

  6. Size-Dependent Specific Surface Area of Nanoporous Film Assembled by Core-Shell Iron Nanoclusters

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

    Antony, Jiji; Nutting, Joseph; Baer, Donald R.; Meyer, Daniel; Sharma, Amit; Qiang, You

    2006-01-01

    Nanoporous films of core-shell iron nanoclusters have improved possibilities for remediation, chemical reactivity rate, and environmentally favorable reaction pathways. Conventional methods often have difficulties to yield stable monodispersed core-shell nanoparticles. We produced core-shell nanoclusters by a cluster source that utilizes combination of Fe target sputtering along with gas aggregations in an inert atmosphere at 7 ? C . Sizes of core-shell iron-iron oxide nanoclusters are observed with transmission electron microscopy (TEM). The specific surface areas of the porous films obtained from Brunauer-Emmett-Teller (BET) process are size-dependent and compared with the calculated data.more »« less

  7. Naked singularities in cylindrical collapse of counter-rotating dust shells

    E-Print Network [OSTI]

    Brien C. Nolan

    2002-04-09

    Solutions describing the gravitational collapse of asymptotically flat cylindrical and prolate shells of (null) dust are shown to admit globally naked singularities.

  8. Evolution of a vacuum shell in the Friedman-Schwarzschild world

    E-Print Network [OSTI]

    V. I. Dokuchaev; S. V. Chernov

    2008-08-29

    The method of an effective potential is used to investigate the possible types of evolution of vacuum shells in the Friedman-Schwarzschild world. Such shells are assumed to emerge during phase transitions in the early Universe. The possible global geometries are constructed for the Friedman- Schwarzschild worlds. Approximate solutions to the equation of motion of a vacuum shell have been found. The conditions under which the end result of the evolution of the vacuum shells under consideration is the formation of black holes and wormholes with baby universes inside have been found. The interior of this world can be a closed, flat, or open Friedman universe.

  9. Fusion hindrance and roles of shell effects in superheavy mass region

    E-Print Network [OSTI]

    Y. Aritomo

    2006-09-18

    We present the first attempt of systematically investigating the effects of shell correction energy for a dynamical process, which includes fusion, fusion-fission and quasi-fission processes. In the superheavy mass region, for the fusion process, shell correction energy plays a very important role and enhances the fusion probability when the colliding partner has a strong shell structure. By analyzing the trajectory in three-dimensional coordinate space with the Langevin equation, we reveal the mechanism of the enhancement of the fusion probability caused by `cold fusion valleys'. The temperature dependence of shell correction energy is considered.

  10. Fusion hindrance and roles of shell effects in superheavy mass region

    E-Print Network [OSTI]

    Aritomo, Y

    2006-01-01

    We present the first attempt of systematically investigating the effects of shell correction energy for a dynamical process, which includes fusion, fusion-fission and quasi-fission processes. In the superheavy mass region, for the fusion process, shell correction energy plays a very important role and enhances the fusion probability when the colliding partner has a strong shell structure. By analyzing the trajectory in three-dimensional coordinate space with the Langevin equation, we reveal the mechanism of the enhancement of the fusion probability caused by `cold fusion valleys'. The temperature dependence of shell correction energy is considered.

  11. FABRICATION AND PROPERTIES OF OER COATED RESORCINOL-FORMALDEHYDE SHELLS FOR OMEGA EXPERIMENTS

    SciTech Connect (OSTI)

    NIKROO,A; CZECHOWICZ,D; PAGUIO,R; GREENWOOD,A.L; TAKAGI,M

    2003-06-01

    OAK-B135 New high gain designs for direct drive ignition on NIF require foam shells. Scaled down versions of these designs are needed for near term experiments on the OMEGA laser facility at the Laboratory Laser Energetics (LLE). These shells need to be about 1 mm in diameter and 50-100 {micro}m wall thickness and densities of 100-250 mg/cc. In addition, a full density permeation seal needs to be deposited for retention of the fill gas at room temperature or the ice at cryogenic temperatures. They have fabricated such shells using Resorcinol-formaldehyde (R/F) as the selected foam material due to its transparency in the optical region. Extensive characterization of the wall uniformity of these shells has been performed. The foam shells have {approx} 5%-6% non-concentricities on the average. A full density permeation seal has been deposited on the R/F shells using two different techniques. In the first technique R/F shells are coated directly with plasma polymer to thicknesses of 3-4 {micro}m. In the second technique, R/F shells are coated with polyvinylphenol, using a chemical interfacial polymerization technique. Data on surface finish and gas retention for R/F shells coated by both methods are provided.

  12. Structural Basis for Near Unity Quantum Yield Core/Shell Nanostructures

    SciTech Connect (OSTI)

    McBride, James; Treadway, Joe; Pennycook, Stephen J; Rosenthal, Sandra

    2006-01-01

    Aberration-corrected Z-contrast scanning transmission electron microscopy of core/shell nanocrystals shows clear correlations between structure and quantum efficiency. Uniform shell coverage is obtained only for a graded CdS/ZnS shell material and is found to be critical to achieving near 100% quantum yield. The sublattice sensitivity of the images confirms that preferential growth takes place on the anion-terminated surfaces. This explains the three-dimensional "nanobullet" shape observed in the case of core/shell nanorods.

  13. Fusion Hindrance and the Role of Shell Effects in the Superheavy Mass Region

    E-Print Network [OSTI]

    Y. Aritomo

    2006-09-13

    We present the first attempt of the systematical investigation about the effects of shell correction energy for dynamical processes, which include fusion, fusion-fission and quasi-fission processes. In the superheavy mass region, for the fusion process, the shell correction energy plays a very important role and enhances the fusion probability, when the colliding partner has strong shell structure. By analyzing the trajectory in the three-dimensional coordinate space with a Langevin equation, we reveal the mechanism of the enhancement of the fusion probability caused by shell effects.

  14. Method and apparatus for determining diameter and wall thickness of minute hollow spherical shells

    DOE Patents [OSTI]

    Steinman, D.A.

    1980-05-30

    Method and apparatus for determining diameter and wall thickness of hollow microspheres or shells wherein terminal velocities of shells traveling in fluid-filled conduits of differing diameters are measured. A wall-effect factor is determined as a ratio of the terminal velocities, and shell outside diameter may then be ascertained as a predetermined empirical function of wall-effect factor. For shells of known outside diameter, wall thickness may then be ascertained as a predetermined empirical function of terminal velocity in either conduit.

  15. Bandgap Engineering of InP QDs Through Shell Thickness and Composition...

    Office of Scientific and Technical Information (OSTI)

    traditional cadmium-based NQDs, but suffers from extreme susceptibility to oxidation. Coating InP cores with more stable shell materials significantly improves nanocrystal...

  16. Shell Gas to Liquids in the context of a Future Fuel Strategy...

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

    Fuel Strategy - Technical Marketing Aspects 2003 DEER Conference Presentation: Shell Global Solutions (US) Inc. 2003deerclark.pdf More Documents & Publications An Evaluation...

  17. Nuclear Level Density: Shell Model vs Mean Field

    E-Print Network [OSTI]

    Roman Sen'kov; Vladimir Zelevinsky

    2015-08-15

    The knowledge of the nuclear level density is necessary for understanding various reactions including those in the stellar environment. Usually the combinatorics of Fermi-gas plus pairing is used for finding the level density. Recently a practical algorithm avoiding diagonalization of huge matrices was developed for calculating the density of many-body nuclear energy levels with certain quantum numbers for a full shell-model Hamiltonian. The underlying physics is that of quantum chaos and intrinsic thermalization in a closed system of interacting particles. We briefly explain this algorithm and, when possible, demonstrate the agreement of the results with those derived from exact diagonalization. The resulting level density is much smoother than that coming from the conventional mean-field combinatorics. We study the role of various components of residual interactions in the process of thermalization, stressing the influence of incoherent collision-like processes. The shell-model results for the traditionally used parameters are also compared with standard phenomenological approaches.

  18. Multiphoton inner-shell ionization of the carbon atom

    E-Print Network [OSTI]

    Rey, H F

    2015-01-01

    We apply time-dependent R-matrix theory to study inner-shell ionization of C atoms in ultra-short high-frequency light fields with a photon energy between 170 and 245 eV. At an intensity of 10$^{17}$ W/cm$^2$, ionization is dominated by single-photon emission of a $2\\ell$ electron, with two-photon emission of a 1s electron accounting for about 2-3\\% of all emission processes, and two-photon emission of $2\\ell$ contributing about 0.5-1\\%. Three-photon emission of a 1s electron is estimated to contribute about 0.01-0.03\\%. Around a photon energy of 225 eV, two-photon emission of a 1s electron, leaving C$^+$ in either 1s2s2p$^3$ or 1s2p$^4$ is resonantly enhanced by intermediate 1s2s$^2$2p$^3$ states. The results demonstrate the capability of time-dependent R-matrix theory to describe inner-shell ionization processes including rearrangement of the outer electrons.

  19. Simple and Versatile Route to the Synthesis of Anisotropic Bimetallic Core-Shell and Monometallic Hollow Nanostructures: Ag (AgCl)-Pt Core-Shell Nanocubes and Pt Nanoboxes

    E-Print Network [OSTI]

    Tan, Yen Nee

    We report herewith a simple and versatile route for the preparation of anisotropic Ag(AgCl)-Pt core-shell nanocubes and Pt nanoboxes. The core-shell nanocubes were first synthesized through the simultaneous reduction method ...

  20. Black Ge Based on Crystalline/Amorphous Core/Shell Nanoneedle Arrays

    E-Print Network [OSTI]

    Javey, Ali

    Black Ge Based on Crystalline/Amorphous Core/Shell Nanoneedle Arrays Yu-Lun Chueh,,§,|,# Zhiyong, ROC ABSTRACT Direct growth of black Ge on low-temperature substrates, including plastics and rubber is reported. The material is based on highly dense, crystalline/amorphous core/shell Ge nanoneedle arrays

  1. Core-Protected Platinum Monolayer Shell High-Stability Electrocatalysts for Fuel-Cell Cathodes

    SciTech Connect (OSTI)

    Adzic, R.R.; Sasaki, K.; Naohara, H.; Cai, Y.; Choi, Y.M.; Liu, P.; Vukmirovic, M.B.; Wang, J.X.

    2010-11-08

    More than skin deep: Platinum monolayers can act as shells for palladium nanoparticles to lead to electrocatalysts with high activities and an ultralow platinum content, but high platinum utilization. The stability derives from the core protecting the shell from dissolution. In fuel-cell tests, no loss of platinum was observed in 200?000 potential cycles, whereas loss of palladium was significant.

  2. Core-Protected Platinum Monolayer Shell High-Stability Electrocatalysts for Fuel-Cell Cathodes

    SciTech Connect (OSTI)

    K Sasaki; H Naohara; Y Cai; Y Choi; P Liu; M Vukmirovic; J Wang; R Adzic

    2011-12-31

    Platinum monolayers can act as shells for palladium nanoparticles to lead to electrocatalysts with high activities and an ultralow platinum content, but high platinum utilization. The stability derives from the core protecting the shell from dissolution. In fuel-cell tests, no loss of platinum was observed in 200,000 potential cycles, whereas loss of palladium was significant.

  3. Measurements of fuel and shell areal densities of OMEGA capsule implosions using elastically scattered protons

    E-Print Network [OSTI]

    Measurements of fuel and shell areal densities of OMEGA capsule implosions using elastically., Opt. Commun. 133, 495 1997 . Simultaneous measurements of elastically scattered protons, i.e., ``knock in diameter and with CD shells of 20 m thickness, were filled to about 15 atm and irradiated with 23 kJ of UV

  4. Off-shell BRST-VSUSY superalgebra for D=4 BF theories in the superconnection formalism

    E-Print Network [OSTI]

    Aidaoui, A

    2006-01-01

    We propose the superconnection formalism to construct the off-shell BRST-VSUSY superalgebra for D=4 BF theories. The method is based on the natural introduction of physical fields as well as auxiliary fields via superconnections and their associated supercurvatures defined on a superspace. We also give a prescription to build the off-shell BRST-VSUSY exact quantum action.

  5. Off-shell BRST-VSUSY superalgebra for D=4 BF theories in the superconnection formalism

    E-Print Network [OSTI]

    A. Aidaoui; M. Tahiri

    2006-07-13

    We propose the superconnection formalism to construct the off-shell BRST-VSUSY superalgebra for D=4 BF theories. The method is based on the natural introduction of physical fields as well as auxiliary fields via superconnections and their associated supercurvatures defined on a superspace. We also give a prescription to build the off-shell BRST-VSUSY exact quantum action.

  6. Observation of tearing mode deceleration and locking due to eddy currents induced in a conducting shell

    E-Print Network [OSTI]

    Fitzpatrick, Richard

    Observation of tearing mode deceleration and locking due to eddy currents induced in a conducting eddy currents induced by the rotating mode in the conducting shell surrounding the plasma. According to the amplitude of the mode.4­7 According to this theory, eddy currents induced in the conducting shell

  7. Triple-picket warm plastic-shell implosions on OMEGA P. B. Radha,1

    E-Print Network [OSTI]

    Triple-picket warm plastic-shell implosions on OMEGA P. B. Radha,1 C. Stoeckl,1 V. N. Goncharov,1 J-gas-filled plastic shells are imploded by direct irradiation from the OMEGA laser T. R. Boehly et al., Opt. Commun

  8. Robust Route to Unimolecular Core-Shell and Hollow Polymer Nanoparticles

    E-Print Network [OSTI]

    Lin, Zhiqun

    composed of inner degradable core blocks and outer photo-cross-linkable shell blocks were synthesized via- quently, uniform unimolecular core-shell nanoparticles were successfully produced by photo chains can occur when the solution concentration decreases below the critical micelle concentration (CMC

  9. FEW ELECTRON QUANTUM DOTS IN InAs/InP CORE SHELL NANOWIRES

    E-Print Network [OSTI]

    Nygård, Jesper

    with a thin shell of InP, are explored as a system where a quantum dot can be defined and probed electricallyFEW ELECTRON QUANTUM DOTS IN InAs/InP CORE SHELL NANOWIRES By Shivendra Upadhyay Delft University . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.3 Quantum dots in disordered nanowires . . . . . . . . . . . . . . . . . 14 3 Fabrication 16 3

  10. $J$-pairing Interactions of Fermions in a Single-$j$ Shell

    E-Print Network [OSTI]

    A. Arima

    2004-05-26

    In this talk I shall introduce our recent works on general pairing interactions and pair truncation approximations for fermions in a single-j shell, including the spin zero dominance, features of eigenvalues of fermion systems in a single-j shell interacting by a $J-$pairing interaction.

  11. Risk Assessment in Healthcare Collaborative Settings: A Case Study Using SHELL

    E-Print Network [OSTI]

    Antunes, Pedro

    Risk Assessment in Healthcare Collaborative Settings: A Case Study Using SHELL Pedro Antunes1 nbaloian@gmail.com Abstract. This paper describes a case study addressing risk assessment in a hospital: SHELL, Risk Assessment, Collaborative Settings, Hospitals. 1 Introduction Risk assessment in healthcare

  12. SUBDIVISION SURFACES: A NEW PARADIGM FOR THIN-SHELL FINITE-ELEMENT ANALYSIS

    E-Print Network [OSTI]

    Desbrun, Mathieu

    SUBDIVISION SURFACES: A NEW PARADIGM FOR THIN-SHELL FINITE-ELEMENT ANALYSIS Fehmi Cirak1 , Michael for thin-shell finite-element analysis based on the use of subdivision surfaces for: i) describing by subdivision are H2 and, consequently, have a finite Kirchhoff-Love energy. The resulting finite elements

  13. Core–shell TiO? microsphere with enhanced photocatalytic activity and improved lithium storage

    SciTech Connect (OSTI)

    Guo, Hong; Tian, Dongxue; Liu, Lixiang; Wang, Yapeng; Guo, Yuan; Yang, Xiangjun

    2013-05-01

    Inorganic hollow core–shell spheres have attracted considerable interest due to their singular properties and wide range of potential applications. Herein a novel facile generic strategy of combining template assisted and solvothermal alcoholysis is employed to prepare core–void–shell anatase TiO? nanoparticle aggregates with an excellent photocatalytic activity, and enhanced lithium storage in large quantities. Amorphous carbon can be loaded on the TiO? nanoparticles uniformly under a suitably formulated ethanol/water system in the solvothermal alcoholysis process, and the subsequent calcination results of the formation of core–shell–shell anatase TiO? nanoparticle aggregates. The intrinsic core–void–shell nature as well as high porosity of the unique nanostructures contributes greatly to the superior photocatalytic activity and improved performance as anode materials for lithium ion batteries. - Graphical abstract: A novel strategy of combining template assisted and solvothermal alcoholysis is employed to prepare unique core–void–shell anatase TiO? nanoparticle aggregates with the superior photocatalytic activity and improved lithium storage. Highlights: • TiO? mesospheres are synthesized by solvothermal alcoholysis. • It is core–void–shell structure and the thickness of shell is estimated to 80 nm. • It exhibits a remarkable photocatalytic activity and improved lithium storage.

  14. Shell decay rates of native and alien freshwater bivalves and implications for habitat engineering

    E-Print Network [OSTI]

    Shell decay rates of native and alien freshwater bivalves and implications for habitat engineering by the alien Corbicula and Dreissena may have little effect on standing stocks of spent shells, unless the aliens invade sites where unionids are scarce or absent. Keywords: aragonite, calcite, calcium carbonate

  15. THE SEPARATION OF CRAB MEAT FROM SHELL & TENDON BY A CENTRIFUGAL PROCESS

    E-Print Network [OSTI]

    THE SEPARATION OF CRAB MEAT FROM SHELL & TENDON BY A CENTRIFUGAL PROCESS Wayne I. Tretsven of centrifugal force tothe problem. Trials with an industrial, solid -bowl centrifuge indicated that a machine of this type had great potential for the separation of meat from shell. The centrifuge, a Bird Machine Co

  16. AUTOMATED BATCH CHARACTERIZATION OF ICF SHELLS WITH VISION-ENABLED OPTICAL MICROSCOPE SYSTEM

    SciTech Connect (OSTI)

    HUANG,H; STEPHENS,R.B; HILL,D.W; LYON,C; NIKROO,A; STEINMAN,D.A

    2003-06-01

    OAK-B135 Inertial Confinement Fusion (ICF) shells are mesoscale objects with nano-scale dimensional and nano-surface finish requirements. Currently, the shell dimensions are measured by white-light interferometry and an image analysis method. These two methods complement each other and give a rather complete data set on a single shell. The process is, however, labor intensive. They have developed an automation routine to fully characterize a shell in one shot and perform unattended batch measurements. The method is useful to the ICF program both for production screening and for full characterization. It also has potential for Inertial Fusion Energy (IFE) power plant where half a million shells need to be processed daily.

  17. First Observations of Nonhydrodynamic Mix at the Fuel-Shell Interface in Shock-Driven Inertial Confinement Implosions

    E-Print Network [OSTI]

    Amendt, P.

    A strong nonhydrodynamic mechanism generating atomic fuel-shell mix has been observed in strongly shocked inertial confinement fusion implosions of thin deuterated-plastic shells filled with [superscript 3]He gas. These ...

  18. Fully microscopic shell-model calculations with realistic effective hamiltonians

    E-Print Network [OSTI]

    L. Coraggio; A. Covello; A. Gargano; N. Itaco; T. T. S. Kuo

    2011-01-24

    The advent of nucleon-nucleon potentials derived from chiral perturbation theory, as well as the so-called V-low-k approach to the renormalization of the strong short-range repulsion contained in the potentials, have brought renewed interest in realistic shell-model calculations. Here we focus on calculations where a fully microscopic approach is adopted. No phenomenological input is needed in these calculations, because single-particle energies, matrix elements of the two-body interaction, and matrix elements of the electromagnetic multipole operators are derived theoretically. This has been done within the framework of the time-dependent degenerate linked-diagram perturbation theory. We present results for some nuclei in different mass regions. These evidence the ability of realistic effective hamiltonians to provide an accurate description of nuclear structure properties.

  19. Particle decay studies at or near closed shells

    SciTech Connect (OSTI)

    Toth, K.S.

    1985-01-01

    We summarize briefly two sets of investigations. In the first one ..cap alpha..-decay rates of neutron-deficient even-even Pb isotopes were studied by using the UNISOR separator on-line at the Holifield Heavy Ion Research Facility. These data indicate that midway between N = 82 and N = 126, the Z = 82 shell gap may not exist. The second investigation, carried out at the Lawrence Berkeley Laboratory 88-Inch Cyclotron and SuperHILAC, has dealt with the delayed-proton decays of the N = 81 precursors /sup 147/Dy, /sup 149/Er, and /sup 151/Yb. All three proton spectra have sharp peaks and thus provide evidence for greatly reduced level densities in the N = 82 proton emitting nuclei /sup 147/Tb, /sup 149/Ho, and /sup 151/Tm. 6 refs., 3 figs.

  20. Shell plans $2. 2-billion renovation of Dutch refinery

    SciTech Connect (OSTI)

    Ladeur, P. (Shell Internationale Petroleum Maatschappij B.V., Hague (Netherlands)); Bijwaard, H.

    1993-04-26

    Royal Dutch/Shell Group recently approved a $2.2 billion rejuvenation of its Pernis refinery, near Rotterdam. This upgrade will enable the refinery to meet product volume and quality demands well into the next century, while reducing environmental emissions. Cornerstones of the $1.7-billion main revamp project are a single-train, 8,000 metric tons/sd (mt/sd), or about 56,000 b/sd, hydrocracking unit and a three-train 1,650 mt/sd residue-gasification unit for production of hydrogen and sulfur-free fuel gas. Fuel gas will be used in a new 115-mw electricity cogeneration plant. In addition, new amine treating, sulfur recovery, and tail gas units will be installed. The paper describes the process selection; hydrocracking unit; gasification unit; utilities; construction; and environmental aspects.

  1. Development of simulation tools for virus shell assembly. Final report

    SciTech Connect (OSTI)

    Berger, Bonnie

    2001-01-05

    Prof. Berger's major areas of research have been in applying computational and mathematical techniques to problems in biology, and more specifically to problems in protein folding and genomics. Significant progress has been made in the following areas relating to virus shell assembly: development has been progressing on a second-generation self-assembly simulator which provides a more versatile and physically realistic model of assembly; simulations are being developed and applied to a variety of problems in virus assembly; and collaborative efforts have continued with experimental biologists to verify and inspire the local rules theory and the simulator. The group has also worked on applications of the techniques developed here to other self-assembling structures in the material and biological sciences. Some of this work has been conducted in conjunction with Dr. Sorin Istrail when he was at Sandia National Labs.

  2. Double shell slurry low-temperature corrosion tests

    SciTech Connect (OSTI)

    Divine, J.R.; Bowen, W.M.; McPartland, S.A.; Elmore, R.P.; Engel, D.W.

    1983-09-01

    A series of year-long tests have been completed on potential double shell slurry (DSS) compositions at temperatures up to 100/sup 0/C. These tests have sought data on uniform corrosion, pitting, and stress-corrosion cracking. No indication of the latter two types of corrosion were observed within the test matrix. Corrosion rates after four months were generally below the 1 mpy (25 ..mu..m/y) design limit. By the end of twelve months all results were below this limit and, except for very concentrated mixtures, all were below 0.5 mpy. Prediction equations were generated from a model fitted to the data. The equations provide a rapid means of estimating the corrosion rate for proposed DSS compositions.

  3. Proceedings of the International Association for Shell and Spatial Structures (IASS) Symposium 2010, Shanghai Spatial Structures Permanent and Temporary

    E-Print Network [OSTI]

    Lygeros, John

    Restaurant at Xochimilco [4], and (right) Chapel Lomas de Cuernavaca [4]. Although the shape of both shells

  4. Resource Letter NSM-1: New insights into the nuclear shell model

    SciTech Connect (OSTI)

    Dean, David Jarvis [ORNL; Hamilton, J. H. [Vanderbilt University

    2011-01-01

    This Resource Letter provides a guide to the literature on the spherical shell model as applied to nuclei. The nuclear shell model describes the structure of nuclei starting with a nuclear core developed by the classical neutron and proton magic numbers N,Z=2,8,20,28,50,82, 126, where gaps occur in the single-particle energies as a shell is filled, and the interactions of valence nucleons that reside beyond that core. Various modern extensions of this model for spherical nuclei are likewise described. Significant extensions of the nuclear shell model include new magic numbers for spherical nuclei and now for deformed nuclei as well. When both protons and neutrons have shell gaps at the same spherical or deformed shapes, they can reinforce each other to give added stability to that shape and lead to new magic numbers. The vanishings of the classical spherical shell model energy gaps and magic numbers in new neutron-rich nuclei are described. Spherical and deformed shell gaps are seen to be critical for the existence of elements with Z > 100.

  5. Shell effects in hot nuclei and their influence on nuclear composition in supernova matter

    SciTech Connect (OSTI)

    Nishimura, Suguru [Department of Pure and Applied Physics, Waseda University, 3-4-1 Okubo Shinjuku-ku, Tokyo 169-8555 (Japan); Takano, Masatoshi [Department of Pure and Applied Physics, Waseda University, 3-4-1 Okubo Shinjuku-ku, Tokyo 169-8555, Japan and Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo Shinjuku-ku, Tokyo 169-8555 (Japan)

    2014-05-02

    We calculate nuclear composition in supernova (SN) matter explicitly taking into account the temperature dependence of nuclear shell effects. The abundance of nuclei in SN matter is important in the dynamics of core-collapse supernovae and, in recently constructed equations of state (EOS) for SN matter, the composition of nuclei are calculated assuming nuclear statistical equilibrium wherein the nuclear internal free energies govern the composition. However, in these EOS, thermal effects on the shell energy are not explicitly taken into account. To address this shortfall, we calculate herein the shell energies of hot nuclei and examine their influence on the composition of SN matter. Following a simplified macroscopic-microscopic approach, we first calculate single-particle (SP) energies by using a spherical Woods-Saxon potential. Then we extract shell energies at finite temperatures using Strutinsky method with the Fermi distribution as the average occupation probability of the SP levels. The results show that at relatively low temperatures, shell effects are still important and magic nuclei are abundant. However, at temperatures above approximately 2 MeV, shell effects are almost negligible, and the mass fractions with shell energies including the thermal effect are close to those obtained from a simple liquid drop model at finite temperatures.

  6. DETECTING THE RAPIDLY EXPANDING OUTER SHELL OF THE CRAB NEBULA: WHERE TO LOOK

    SciTech Connect (OSTI)

    Wang Xiang; Ferland, G. J. [Department of Physics and Astronomy, University of Kentucky, Lexington, KY 40506 (United States); Baldwin, J. A.; Loh, E. D.; Richardson, C. T., E-mail: xiang.wang@uky.edu [Department of Physics and Astronomy, Michigan State University, East Lansing, MI 48824-2320 (United States)

    2013-09-10

    We present a range of steady-state photoionization simulations, corresponding to different assumed shell geometries and compositions, of the unseen postulated rapidly expanding outer shell to the Crab Nebula. The properties of the shell are constrained by the mass that must lie within it, and by limits to the intensities of hydrogen recombination lines. In all cases the photoionization models predict very strong emissions from high ionization lines that will not be emitted by the Crab's filaments, alleviating problems with detecting these lines in the presence of light scattered from brighter parts of the Crab. The near-NIR [Ne VI] {lambda}7.652 {mu}m line is a particularly good case; it should be dramatically brighter than the optical lines commonly used in searches. The C IV {lambda}1549 doublet is predicted to be the strongest absorption line from the shell, which is in agreement with Hubble Space Telescope observations. We show that the cooling timescale for the outer shell is much longer than the age of the Crab, due to the low density. This means that the temperature of the shell will actually ''remember'' its initial conditions. However, the recombination time is much shorter than the age of the Crab, so the predicted level of ionization should approximate the real ionization. In any case, it is clear that IR observations present the best opportunity to detect the outer shell and so guide future models that will constrain early events in the original explosion.

  7. Platinum Monolayer on IrFe Core–Shell Nanoparticle Electrocatalysts for the Oxygen Reduction Reaction

    SciTech Connect (OSTI)

    Sasaki K.; Kuttiyiel, K.A.; Su, D.; Adzic, R.R.

    2012-04-19

    We synthesized high activity and stability platinum monolayer on IrFe core-shell nanoparticle electrocatalysts. Carbon-supported IrFe core-shell nanoparticles were synthesized by chemical reduction and subsequent thermal annealing. The formation of Ir shells on IrFe solid-solution alloy cores has been verified by scanning transmission electron microscopy coupled with energy-loss spectroscopy (EELS) and in situ X-ray absorption spectroscopy. The Pt monolayers were deposited on IrFe core-shell nanoparticles by galvanic replacement of underpotentially deposited Cu adatoms on the Ir shell surfaces. The specific and Pt mass activities for the ORR on the Pt monolayer on IrFe core-shell nanoparticle electrocatalyst are 0.46 mA/cm{sup 2} and 1.1 A/mg{sub Pt}, which are much higher than those on a commercial Pt/C electrocatalyst. High durability of Pt{sub ML}/IrFe/C has also been demonstrated by potential cycling tests. These high activity and durability observed can be ascribed to the structural and electronic interaction between the Pt monolayer and the IrFe core-shell nanoparticles.

  8. Carbon-Supported IrNi Core-Shell Nanoparticles: Synthesis Characterization and Catalytic Activity

    SciTech Connect (OSTI)

    K Sasaki; K Kuttiyiel; L Barrio; D Su; A Frenkel; N Marinkovic; D Mahajan; R Adzic

    2011-12-31

    We synthesized carbon-supported IrNi core-shell nanoparticles by chemical reduction and subsequent thermal annealing in H{sub 2}, and verified the formation of Ir shells on IrNi solid solution alloy cores by various experimental methods. The EXAFS analysis is consistent with the model wherein the IrNi nanoparticles are composed of two-layer Ir shells and IrNi alloy cores. In situ XAS revealed that the Ir shells completely protect Ni atoms in the cores from oxidation or dissolution in an acid electrolyte under elevated potentials. The formation of Ir shell during annealing due to thermal segregation is monitored by time-resolved synchrotron XRD measurements, coupled with Rietveld refinement analyses. The H{sub 2} oxidation activity of the IrNi nanoparticles was found to be higher than that of a commercial Pt/C catalyst. This is predominantly due to Ni-core-induced Ir shell contraction that makes the surface less reactive for IrOH formation, and the resulting more metallic Ir surface becomes more active for H{sub 2} oxidation. This new class of core-shell nanoparticles appears promising for application as hydrogen anode fuel cell electrocatalysts.

  9. Facile approach to prepare hollow core–shell NiO microspherers for supercapacitor electrodes

    SciTech Connect (OSTI)

    Han, Dandan; Xu, Pengcheng; Jing, Xiaoyan; Wang, Jun; Song, Dalei; Liu, Jingyuan; Zhang, Milin

    2013-07-15

    A facile lamellar template method (see image) has been developed for the preparation of uniform hollow core–shell structure NiO (HCS–NiO) with a nanoarchitectured wall structure. The prepared NiO was found to be highly crystalline in uniform microstructures with high specific surface area and pore volume. The results indicated that ethanol interacted with trisodium citrate played an important role for the formation of hollow core–shell spheres. On the basis of the analysis of the composition and the morphology, a possible formation mechanism was investigated. NiO microspheres with hollow core–shell showed excellent capacitive properties. The exceptional cyclic, structural and electrochemical stability with ?95% coulombic efficiency, and very low ESR value from impedance measurements promised good utility value of hollow core–shell NiO material in fabricating a wide range of high-performance electrochemical supercapacitors. - The hollow core–shell NiO was prepared with a facile lamellar template method. The prepared NiO show higher capacitance, lower ion diffusion resistance and better electroactive surface utilization for Faradaic reactions. - Highlights: • Formation of hollow core–shell NiO via a novel and facile precipitation route. • Exhibited uniform feature sizes and high surface area of hollow core–shell NiO. • Synthesized NiO has high specific capacitance ( 448 F g{sup 1}) and very low ESR value. • Increased 20% of long life cycles capability after 500 charge–discharge cycles.

  10. H I SHELLS AND SUPERSHELLS IN THE I-GALFA H I 21 cm LINE SURVEY. I. FAST-EXPANDING H I SHELLS ASSOCIATED WITH SUPERNOVA REMNANTS

    SciTech Connect (OSTI)

    Park, G.; Koo, B.-C. [Department of Physics and Astronomy, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742 (Korea, Republic of); Gibson, S. J.; Newton, J. H. [Department of Physics and Astronomy, Western Kentucky University, Bowling Green, KY 42101 (United States); Kang, J.-H.; Lane, D. C.; Douglas, K. A. [Arecibo Observatory, HC 3 Box 53995, Arecibo, PR 00612 (United States); Peek, J. E. G. [Department of Astronomy, Columbia University, New York, NY 10027 (United States); Korpela, E. J. [Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States); Heiles, C., E-mail: koo@astro.snu.ac.kr [Radio Astronomy Lab, UC Berkeley, 601 Campbell Hall, Berkeley, CA 94720 (United States)

    2013-11-01

    We search for fast-expanding H I shells associated with Galactic supernova remnants (SNRs) in the longitude range l ? 32° to 77° using 21 cm line data from the Inner-Galaxy Arecibo L-band Feed Array (I-GALFA) H I survey. Among the 39 known Galactic SNRs in this region, we find such H I shells in 4 SNRs: W44, G54.4-0.3, W51C, and CTB 80. All four were previously identified in low-resolution surveys, and three of those (excluding G54.4-0.3) were previously studied with the Arecibo telescope. A remarkable new result, however, is the detection of H I emission at both very high positive and negative velocities in W44 from the receding and approaching parts of the H I expanding shell, respectively. This is the first detection of both sides of an expanding shell associated with an SNR in H I 21 cm emission. The high-resolution I-GALFA survey data also reveal a prominent expanding H I shell with high circular symmetry associated with G54.4-0.3. We explore the physical characteristics of four SNRs and discuss what differentiates them from other SNRs in the survey area. We conclude that these four SNRs are likely the remnants of core-collapse supernovae interacting with a relatively dense (?> 1 cm{sup –3}) ambient medium, and we discuss the visibility of SNRs in the H I 21 cm line.

  11. The Impact of Ceramic Shell Strength on Hot Tearing during Investment Casting

    SciTech Connect (OSTI)

    Norouzi, Saeid [MAPNA GROUP Co (Iran, Islamic Republic of); Farhangi, Hassan [School of Metallurgy and Materials Engineering, University of Tehran (Iran, Islamic Republic of)

    2011-01-17

    The effect of ceramic shell strength on hot tearing susceptibility during solidification was inspected practicing investment casting of the cobalt-base superalloy samples with the same casting conditions, but different ceramic shell systems. Results showed that the lower the ceramic shell strength upon using polymer additives, the lower the hindered contraction rate, and the lower the hindered contraction rate, the smaller the hot tearing tendency. Optical microscopy and electron microscopy scanning revealed that the hot tear propagated along the last solidified interdendritic phase, and that the hot tear surface had two major modes: (1) the ductile region in the outer layer; and (2) the inner region of liquid embrittlement.

  12. Hamiltonian treatment of collapsing thin shells in Lanczos-Lovelock theories

    SciTech Connect (OSTI)

    Crisostomo, Juan; Campo, Sergio del; Saavedra, Joel

    2004-09-15

    The Hamiltonian treatment for the collapse of thin shells for a family of Lanczos-Lovelock theories is studied. This formalism allows us to carry out a concise analysis of these theories. It is found that the black holes solution can be created by collapsing a thin shell. Naked singularities cannot be formed by this mechanism. Among the different Lanczos-Lovelock theories, the Chern-Simons theory corresponds to an exceptional case, because naked singularities can emerge from the collapse of a thin shell. This kind of theory does not possess a gravitational self-interaction analogous to the Newtonian case.

  13. A study of arbitrary rotations of shells of revolution by the finite element method 

    E-Print Network [OSTI]

    Rosenbaum, James Byron

    1974-01-01

    were reduced to eiskf3, ez3kz~, and the squares and products of the two. This contributed rotation effects to the nonlinear strain energy which previously had not been taken into account. As a computational time saver, the partial derivatives... II-1 III-1 IV-1 Geometry of Shell of Revolution Segment. . Coordinization of Shell Element. . Comparison of SNASOR III with New SNASOR III for a Shallow Shell of X = 6. Page 14 26 31 IV-2 Buckling Analysis of Higher Order Strain Energy...

  14. Particle-Number Projected Hartree-Fock-Bogoliubov Study with Effective Shell Model Interactions

    E-Print Network [OSTI]

    I. Maqbool; J. A. Sheikh; P. A. Ganai; P. Ring

    2010-11-22

    We perform particle-number projected mean-field study using the recently developed symmetry-projected Hartree-Fock-Bogoliubov (HFB) equations. Realistic calculations have been performed in sd- and fp-shell nuclei using the shell model empirical intearctions, USD and GXPFIA. It is demonstrated that the mean-field results for energy surfaces, obtained with these shell model interactions, are quite similar to those obtained using the density functional approaches. Further, it is shown that particle-number projected results, for neutron rich isotopes, can lead to different ground-state shapes in comparison to the bare HFB calculations.

  15. Source: http://erbsustainability.wordpress.com/2008/10/31/the-simple-economics-of-offshore-drilling-by-andrew-j-hoffman-thomas-p-lyon/

    E-Print Network [OSTI]

    Hoffman, Andrew J.

    the simple economics of oil pricing. If Exxon-Mobil, Chevron, BP, Shell, Total or some other oil company, the blowout of a Unocal rig off the coast of Santa Barbara spilled 3 million gallons, and in 1989 the Exxon

  16. OVERVIEW OF HANFORD SINGLE SHELL TANK (SST) STRUCTURAL INTEGRITY - 12123

    SciTech Connect (OSTI)

    RAST RS; RINKER MW; WASHENFELDER DJ; JOHNSON JB

    2012-01-25

    To improve the understanding of the single-shell tanks (SSTs) integrity, Washington River Protection Solutions, LLC (WRPS), the USDOE Hanford Site tank contractor, developed an enhanced Single-Shell Tank Integrity Project in 2009. An expert panel on SST integrity, consisting of various subject matters experts in industry and academia, was created to provide recommendations supporting the development of the project. This panel developed 33 recommendations in four main areas of interest: structural integrity, liner degradation, leak integrity and prevention, and mitigation of contamination migration. Seventeen of these recommendations were used to develop the basis for the M-45-10-1 Change Package for the Hanford Federal Agreement and Compliance Order, which is also known as the Tri-Party Agreement. The structural integrity of the tanks is a key element in completing the cleanup mission at the Hanford Site. There are eight primary recommendations related to the structural integrity of Hanford SSTs. Six recommendations are being implemented through current and planned activities. The structural integrity of the Hanford SSTs is being evaluated through analysis, monitoring, inspection, materials testing, and construction document review. Structural evaluation in the form of analysis is performed using modern finite element models generated in ANSYS{reg_sign} The analyses consider in-situ, thermal, operating loads and natural phenomena such as earthquakes. Structural analysis of 108 of 149 Hanford SSTs has concluded that the tanks are structurally sound and meet current industry standards. Analyses of the remaining Hanford SSTs are scheduled for FY2013. Hanford SSTs are monitored through a dome deflection program. The program looks for deflections of the tank dome greater than 1/4 inch. No such deflections have been recorded. The tanks are also subjected to visual inspection. Digital cameras record the interior surface of the concrete tank domes, looking for cracks and other surface conditions that may indicate signs of structural distress. The condition of the concrete and rebar of the Hanford SSTs is currently being tested and planned for additional activities in the near future. Concrete and rebar removed from the dome of a 65-year-old tank is being tested for mechanics properties and condition. Results indicated stronger than designed concrete with additional Petrographic examination and rebar testing ongoing. Material properties determined from previous efforts combined with current testing and construction document review will help to generate a database that will provide continuing indication of Hanford SST structural integrity.

  17. Relativistic outflow from two thermonuclear shell flashes on neutron stars

    E-Print Network [OSTI]

    Zand, Jean in 't; Cavecchi, Yuri

    2014-01-01

    We study the exceptionally short (32-41 ms) precursors of two intermediate-duration thermonuclear X-ray bursts observed with RXTE from the neutron stars in 4U 0614+09 and 2S 0918-549. They exhibit photon fluxes that surpass those at the Eddington limit later in the burst by factors of 2.6 to 3.1. We are able to explain both the short duration and the super-Eddington flux by mildly relativistic outflow velocities of 0.1$c$ to 0.3$c$ subsequent to the thermonuclear shell flashes on the neutron stars. These are the highest velocities ever measured from any thermonuclear flash. The precursor rise times are also exceptionally short: about 1 ms. This is inconsistent with predictions for nuclear flames spreading laterally as deflagrations and suggests detonations instead. This is the first time that a detonation is suggested for such a shallow ignition column depth ($y_{\\rm ign}$ = 10$^{10}$ g cm$^{-2}$). The detonation would possibly require a faster nuclear reaction chain, such as bypassing the alpha-capture on $^...

  18. Restoration of Secondary Containment in Double Shell Tank (DST) Pits

    SciTech Connect (OSTI)

    SHEN, E.J.

    2000-10-05

    Cracks found in many of the double-shell tank (DST) pump and valve pits bring into question the ability of the pits to provide secondary containment and remain in compliance with State and Federal regulations. This study was commissioned to identify viable options for maintain/restoring secondary containment capability in these pits. The basis for this study is the decision analysis process which identifies the requirements to be met and the desired goals (decision criteria) that each option will be weighed against. A facilitated workshop was convened with individuals knowledgeable of Tank Farms Operations, engineering practices, and safety/environmental requirements. The outcome of this workshop was the validation or identification of the critical requirements, definition of the current problem, identification and weighting of the desired goals, baselining of the current repair methods, and identification of potential alternate solutions. The workshop was followed up with further investigations into the potential solutions that were identified in the workshop and through other efforts. These solutions are identified in the body of this report. Each of the potential solutions were screened against the list of requirements and only those meeting the requirements were considered viable options. To expand the field of viable options, hybrid concepts that combine the strongest features of different individual approaches were also examined. Several were identified. The decision analysis process then ranked each of the viable options against the weighted decision criteria, which resulted in a recommended solution. The recommended approach is based upon installing a sprayed on coating system.

  19. Recent developments in no-core shell-model calculations

    E-Print Network [OSTI]

    Petr Navratil; Sofia Quaglioni; Ionel Stetcu; Bruce R. Barrett

    2009-04-02

    We present an overview of recent results and developments of the no-core shell model (NCSM), an ab initio approach to the nuclear many-body problem for light nuclei. In this approach, we start from realistic two-nucleon or two- plus three-nucleon interactions. Many-body calculations are performed using a finite harmonic-oscillator (HO) basis. To facilitate convergence for realistic inter-nucleon interactions that generate strong short-range correlations, we derive effective interactions by unitary transformations that are tailored to the HO basis truncation. For soft realistic interactions this might not be necessary. If that is the case, the NCSM calculations are variational. In either case, the ab initio NCSM preserves translational invariance of the nuclear many-body problem. In this review, we, in particular, highlight results obtained with the chiral two- plus three-nucleon interactions. We discuss efforts to extend the applicability of the NCSM to heavier nuclei and larger model spaces using importance-truncation schemes and/or use of effective interactions with a core. We outline an extension of the ab initio NCSM to the description of nuclear reactions by the resonating group method technique. A future direction of the approach, the ab initio NCSM with continuum, which will provide a complete description of nuclei as open systems with coupling of bound and continuum states, is given in the concluding part of the review.

  20. Emergence of the N=16 shell gap in 21O

    E-Print Network [OSTI]

    B. Fernandez-Dominguez; J. S. Thomas; W. N. Catford; F. Delaunay; S. M. Brown; N. A. Orr; M. Rejmund; N. L. Achouri; H. Al Falou; N. A. Ashwood; D. Beaumel; Y. Blumenfeld; B. A. Brown; R. Chapman; M. Chartier; N. Curtis; C. Force; G. de France; S. Franchoo; J. Guillot; P. Haigh; F. Hammache; M. Labiche; V. Lapoux; R. C. Lemmon; F. Marechal; A. Moro; B. Martin; X. Mougeot; B. Mouginot; L. Nalpas; A. Navin; N. Patterson; B. Pietras; E. C. Pollacco; A. Leprince; A. Ramus; J. A. Scarpaci; N. de Séréville; I. Stefan; O. Sorlin; G. Wilson

    2010-12-18

    The spectroscopy of 21O has been investigated using a radioactive 20O beam and the (d,p) reaction in inverse kinematics. The ground and first excited states have been determined to be Jpi=5/2+ and Jpi=1/2+ respectively. Two neutron unbound states were observed at excitation energies of 4.76 +- 0.10 and 6.16 +- 0.11. The spectroscopic factor deduced for the lower of these interpreted as a 3/2+ level, reveals a rather pure 0d3/2 single-particle configuration. The large energy difference between the 3/2+ and 1/2+ states is indicative of the emergence of the N=16 magic number. For the higher lying resonance, which has a character consistent with a spin-parity assignment of 3/2+ or 7/2-, a 71% branching ratio to the first 2+ state in 20O has been observed. The results are compared with new shell model calculations.

  1. Suppression of auger recombination in ""giant"" core/shell nanocrystals

    SciTech Connect (OSTI)

    Garcia Santamaria, Florencio; Vela, Javier; Schaller, Richard D; Hollingsworth, Jennifer A; Klimov, Victor I; Chen, Yongfen

    2009-01-01

    Many potential applications of semiconductor nanocrystals are hindered by nonradiative Auger recombination wherein the electron-hole (exciton) recombination energy is transferred to a third charge carrier. This process severely limits the lifetime and bandwidth of optical gain, leads to large nonradiative losses in light emitting diodes and photovoltaic cells, and is believed to be responsible for intermittency ('blinking') of emission from single nanocrystals. The development of nanostructures in which Auger recombination is suppressed has been a longstanding goal in colloidal nanocrystal research. Here, we demonstrate that such suppression is possible using so-called 'giant' nanocrystals that consist of a small CdSe core and a thick CdS shell. These nanostructures exhibit a very long biexciton lifetime ({approx}10 ns) that is likely dominated by radiative decay instead of non-radiative Auger recombination. As a result of suppressed Auger recombination, even high-order multiexcitons exhibit high emission efficiencies, which allows us to demonstrate optical amplification with an extraordinarily large bandwidth (>500 me V) and record low excitation thresholds.

  2. Evolution of 1612 MHz Maser Emission in Expanding Circumstellar Shells

    E-Print Network [OSTI]

    M. D. Gray D. A. Howe; B. M. Lewis

    2005-09-08

    Observations show that 1612 MHz masers of OH/IR stars can fade on a timescale of a decade. This fading is probably associated with the switch from rapid mass loss, which is ultimately linked with an internal He-shell flash, to the much slower mass loss supported by more quiescent conditions. We study the observed maser decay with a composite computational model, comprising a time-dependent chemical model of the envelope, and a radiation transfer model which provides the maser pumping. Our combined model is able to reproduce the rapid decay of maser intensity, following a sudden drop in the stellar mass-loss rate. The explanation for the rapid fall in maser emission is not a fall in the OH number density, or the kinetic temperature in the inverted layers, but the loss of a radiative pump route which carries population from level 1 to level 4 via levels 16, 15 and 11. The loss of these pump routes is a result, in turn, of a greatly reduced energy density of 53 micron radiation.

  3. Evaluation of potential releases from single-shell tanks

    SciTech Connect (OSTI)

    Ramsdell, J.V. Jr.

    1992-03-01

    Potential toxic chemical concentrations in the air near vents of single-shell tanks have been evaluated using three scenarios. The first scenario duplicates the conditions existing the morning of January 28, 1992, when several workers reported exposure to toxic or irritating gases near the BX and BY tank farms in the 200-East Area at Hanford. The results of this scenario indicate that it is unlikely that a tank in either tank farm could have been the source of the gases associated with the incident. In the other two scenarios, maximum potential concentrations under worst-cast and bounding conditions were examined. The results of theses scenario show that air concentrations of all toxic gases reported to be in the tanks fall below their time-weighted average, threshold limiting values within 5 m of tank vents under worst-case conditions involving a restricted air flow to the tanks. When unrestricted air flow to the tanks and worst-case conditions are assumed, the maximum gas concentrations fall below time-weighted average, threshold limiting values within 15 m of vents.

  4. Recent Developments in No-Core Shell-Model Calculations

    SciTech Connect (OSTI)

    Navratil, P; Quaglioni, S; Stetcu, I; Barrett, B R

    2009-03-20

    We present an overview of recent results and developments of the no-core shell model (NCSM), an ab initio approach to the nuclear many-body problem for light nuclei. In this aproach, we start from realistic two-nucleon or two- plus three-nucleon interactions. Many-body calculations are performed using a finite harmonic-oscillator (HO) basis. To facilitate convergence for realistic inter-nucleon interactions that generate strong short-range correlations, we derive effective interactions by unitary transformations that are tailored to the HO basis truncation. For soft realistic interactions this might not be necessary. If that is the case, the NCSM calculations are variational. In either case, the ab initio NCSM preserves translational invariance of the nuclear many-body problem. In this review, we, in particular, highlight results obtained with the chiral two- plus three-nucleon interactions. We discuss efforts to extend the applicability of the NCSM to heavier nuclei and larger model spaces using importance-truncation schemes and/or use of effective interactions with a core. We outline an extension of the ab initio NCSM to the description of nuclear reactions by the resonating group method technique. A future direction of the approach, the ab initio NCSM with continuum, which will provide a complete description of nuclei as open systems with coupling of bound and continuum states is given in the concluding part of the review.

  5. Modeling analysis of core-shell Si/SiGe nanowires

    E-Print Network [OSTI]

    Tang, Ming Y., 1979-

    2004-01-01

    (cont.) a composition that results in a high mobility has a very promising thermoelectric performance. Lastly, the thermoelectric-related transport properties for a Si/SiGe core-shell nanowire are compared with the related ...

  6. Long-Range Validity of Threshold Laws in Inner-Shell Photodetachment

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

    to any law problematic. Bilodeau et al. have shown for inner-shell photodetachment of helium and sulfur ions that not only are the appropriate threshold laws valid, they are...

  7. Hydrodynamic growth of shell modulations in the deceleration phase of spherical direct-drive implosionsa...

    E-Print Network [OSTI]

    Hydrodynamic growth of shell modulations in the deceleration phase of spherical direct. Se´guin Plasma Science and Fusion Center, Massachusetts Institute of Technology, Cambridge .2 The unstable growth of target nonuniformities is the most significant factor disrupting

  8. Optimization of Passive Constrained Layer Damping Treatments for Vibration Control of Cylindrical Shells

    E-Print Network [OSTI]

    Zheng, H.

    This paper presents the layout optimization of passive constrained layer damping (PCLD) treatment for vibration control of cylindrical shells under a broadband force excitation. The equations governing the vibration responses ...

  9. CONSTRUCTION METHOD STUDY FOR INSTALLATION OF A LARGE RISER IN A SINGLE SHELL TANK

    SciTech Connect (OSTI)

    PICKETT W; ADKISSON DA

    2009-07-22

    This study evaluates and identifies a construction method for cutting a hole in a single-shell tank dome. This study also identifies and evaluates vendors for performing the cut.

  10. CONSTRUCTION METHOD STUDY FOR INSTALLATION OF A LARGE RISER IN A SINGLE-SHELL TANK

    SciTech Connect (OSTI)

    ADKISSON DA

    2010-08-04

    This study evaluates and identifies a construction method for cutting a hole in a single-shell tank dome. This study also identifies and evaluates vendors for performing the cut.

  11. Can nonextremal Reissner-Nordstrom black hole become extremal by assimilating infalling charged particle and shell?

    E-Print Network [OSTI]

    Bin Wang; Ru-Keng Su; P. K. N. Yu; E. C. M. Young

    1998-02-16

    By using the gedanken experiments suggested by Bekenstein and Rosenzweig, we have shown that nonextremal Reissner-Nordstrom black hole cannot turn into extremal one by assimilating infalling charged particle and charged spherical shell.

  12. Preventing Buoyant Displacement Gas Release Events in Hanford Double-Shell Waste Tanks

    SciTech Connect (OSTI)

    Meyer, Perry A.; Stewart, Charles W.

    2001-01-01

    This report summarizes the predictive methods used to ensure that waste transfer operations in Hanford waste tanks do not create waste configurations that lead to unsafe gas release events. The gas release behavior of the waste in existing double-shell tanks has been well characterized, and the flammable gas safety issues associated with safe storage of waste in the current configuration are being formally resolved. However, waste is also being transferred between double-shell tanks and from single-shell tanks into double-shell tanks by saltwell pumping and sluicing that create new wastes and waste configurations that have not been studied as well. Additionally, planning is underway for various waste transfer scenarios to support waste feed delivery to the proposed vitrification plant. It is critical that such waste transfers do not create waste conditions with the potential for dangerous gas release events.

  13. Curvature Condensation and Bifurcation in an Elastic Shell Moumita Das,1

    E-Print Network [OSTI]

    Kudrolli, Arshad

    ordered and partially ordered bulk condensed matter systems such as crystals, liquid crystals, and various context of an everyday example, a thin mylar sheet is bent into a half- cylindrical elastic shell

  14. Coiled tubing deployed ESP works well for Shell in North Sea field

    SciTech Connect (OSTI)

    Watkins, P.; Stewart, D.

    1996-06-01

    What is believed to be the world`s first offshore coiled tubing deployed ESP system was installed by Centrilift, a Division of Baker Hughes Ltd., on Shell Expro`s Auk field Alpha platform in March 1995. After one year, the system is working well and is now viewed as a major step forward in alternative deployment methods for ESPs. Basic features of the system and project background are overviewed here. Shell U.K. Exploration and Production (Expro) operates in the UK Sector of the North Sea on behalf of Shell and Esso. Centrilift worked closely with Shell on this high-profile project and is active on several others, all aimed at reducing the operator`s cost for installing ESPs by using alternative deployment methods.

  15. Retrieval of the Tenth Single-Shell Tank Complete at Hanford...

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

    (DOE) that they have completed retrieval of radioactive and chemical waste from the third single-shell tank (SST) this year. WRPS is the tank operations contractor for the...

  16. Synthesis and structural characterization of ZnTe/ZnSe core/shell tunable quantum dots

    E-Print Network [OSTI]

    Guan, Juan

    2008-01-01

    Colloidal semiconductor nanocrystals or quantum dots have attracted much attention recently with their unique optical properties. Here we present a novel approach to synthesize ZnTe/ZnSe core/shell tunable quantum dots. ...

  17. Functions and requirements for Hanford single-shell tank leakage detection and monitoring

    SciTech Connect (OSTI)

    Iwatate, D.F., Westinghouse Hanford

    1996-07-31

    This document applies the System Engineering process to define the functions and requirements for single shell tank (SST) leakage detection, monitoring and mitigation during the initial SST retrieval sequence.

  18. Mass Measurements Demonstrate a Strong N =28 Shell Gap in Argon

    E-Print Network [OSTI]

    Z. Meisel; S. George; S. Ahn; J. Browne; D. Bazin; B. A. Brown; J. F. Carpino; H. Chung; R. H. Cyburt; A. Estradé; M. Famiano; A. Gade; C. Langer; M. Matoš; W. Mittig; F. Montes; D. J. Morrissey; J. Pereira; H. Schatz; J. Schatz; M. Scott; D. Shapira; K. Smith; J. Stevens; W. Tan; O. Tarasov; S. Towers; K. Wimmer; J. R. Winkelbauer; J. Yurkon; R. G. T. Zegers

    2015-10-06

    We present results from recent time-of-flight nuclear mass measurements at the National Superconducting Cyclotron Laboratory at Michigan State University. We report the first mass measurements of 48Ar and 49Ar and find atomic mass excesses of -22.28(31) MeV and -17.8(1.1) MeV, respectively. These masses provide strong evidence for the closed shell nature of neutron number N=28 in argon, which is therefore the lowest even-Z element exhibiting the N=28 closed shell. The resulting trend in binding-energy differences, which probes the strength of the N=28 shell, compares favorably with shellmodel calculations in the sd-pf shell using SDPF-U and SDPF-MU Hamiltonians.

  19. Application to Export Electric Energy OE Doc No. EA-339-A Shell...

    Office of Environmental Management (EM)

    : Federal Register Notice, Volume 78, No. 45 - March 7, 2013 Application to Export Electric Energy OE Doc No. EA-339-A Shell Energy North America (US), L.P.: Federal Register...

  20. First of all, a very warm welcome to St Andrews and to the Department of Geography & Sustainable Development -whether you are arriving here for the first time or are

    E-Print Network [OSTI]

    Brierley, Andrew

    of Geography & Sustainable Development - whether you are arriving here for the first time or are a returning, however, this takes place within a necessary `architecture' of structures, rules and practices. Hence these unique years in St Andrews. The purpose of this handbook The Department of Geography and Sustainable

  1. Hybrid density functional calculations of the band gap of GaxIn1-xN Xifan Wu,1 Eric J. Walter,2 Andrew M. Rappe,3 Roberto Car,1 and Annabella Selloni1

    E-Print Network [OSTI]

    Rappe, Andrew M.

    Hybrid density functional calculations of the band gap of GaxIn1-xN Xifan Wu,1 Eric J. Walter,2 Andrew M. Rappe,3 Roberto Car,1 and Annabella Selloni1 1Chemistry Department, Princeton University Recent theoretical work has provided evidence that hybrid functionals, which include a fraction of exact

  2. Direct, Non-Destructive Observation of a Bose Condensate M.R. Andrews, M.-O. Mewes, N.J. van Druten, D.S. Durfee, D.M. Kurn, and W. Ketterle

    E-Print Network [OSTI]

    Direct, Non-Destructive Observation of a Bose Condensate M.R. Andrews, M.-O. Mewes, N.J. van Druten condensate is reported. The separation between condensed and normal components was observed inside a magnetic of the same condensate can be taken. Furthermore, the width of the angular distribution of scattered light

  3. He proton spectra for diagnosing shell R and fuel Ti of imploded capsules at OMEGA

    E-Print Network [OSTI]

    D­3 He proton spectra for diagnosing shell R and fuel Ti of imploded capsules at OMEGA C. K. Li, D the first use of 14.7 MeV deuterium­helium3 (D­3 He) proton spectra for diagnosing shell areal density ( R the conditions achieved by these implosions, we utilize, in large part, the 14.7 MeV protons generated from D­3

  4. The effect of various calcium and phosphorus levels on egg production and egg shell quality 

    E-Print Network [OSTI]

    Bradley, John Warren

    1980-01-01

    . ) (Pleiahc~) Angust 1980 ABSTRACT The Effect of Various Calcium and Phosphorus Levels on Egg Production and Egg Shell Quality. (August 1980) John Warren Bradley, Junior B. S. , Texas A&M University Chairman of Advisory Committee: Dr. C. R. Creger Two... experiments were conducted, using a commercial strain of White Leghorn laying hens, to determine the effect of feeding various dietary combinations of calcium and phosphorus on egg production and egg shell quality. Calcium carbonate in the form of oyster...

  5. Sigma models with off-shell N=(4,4) supersymmetry and noncommuting complex structures

    E-Print Network [OSTI]

    M. Goteman; U. Lindstrom; M. Rocek; Itai Ryb

    2010-05-02

    We describe the conditions for extra supersymmetry in N=(2,2) supersymmetric nonlinear sigma models written in terms of semichiral superfields. We find that some of these models have additional off-shell supersymmetry. The (4,4) supersymmetry introduces geometrical structures on the target-space which are conveniently described in terms of Yano f-structures and Magri-Morosi concomitants. On-shell, we relate the new structures to the known bi-hypercomplex structures.

  6. Modifying yolk fatty acid composition to improve the health quality of shell eggs 

    E-Print Network [OSTI]

    Van Elswyk, Mary Elizabeth

    1990-01-01

    MODIFYING YOLK FATTY ACID COMPOSITION TO IMPROVE THE HEALTH QUALITY OF SHELL EGGS A Thesis by MARY ELIZABETH VAN ELSWYK Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1990 Major Subject: Nutrition MODIFYING YOLK FATTY ACID COMPOSITION TO IMPROVE THE HEALTH QUALITY OF SHELL EGGS A Thesis by MARY ELIZABETH VAN ELSWYK Approved as to style and content by: Pamela S. Har s (Chair...

  7. Shell model nuclear matrix elements for competing mechanisms contributing to double beta decay

    SciTech Connect (OSTI)

    Horoi, Mihai

    2013-12-30

    Recent progress in the shell model approach to the nuclear matrix elements for the double beta decay process are presented. This includes nuclear matrix elements for competing mechanisms to neutrionless double beta decay, a comparison between closure and non-closure approximation for {sup 48}Ca, and an updated shell model analysis of nuclear matrix elements for the double beta decay of {sup 136}Xe.

  8. Unique Challenges Accompany Thick-Shell CdSe/nCdS (n > 10) Nanocrystal Synthesis

    SciTech Connect (OSTI)

    Guo, Y; Marchuk, K; Abraham, R; Sampat, S; Abraham, R.; Fang, N; Malko, AV; Vela, J

    2011-12-23

    Thick-shell CdSe/nCdS (n {ge} 10) nanocrystals were recently reported that show remarkably suppressed fluorescence intermittency or 'blinking' at the single-particle level as well as slow rates of Auger decay. Unfortunately, whereas CdSe/nCdS nanocrystal synthesis is well-developed up to n {le} 6 CdS monolayers (MLs), reproducible syntheses for n {ge} 10 MLs are less understood. Known procedures sometimes result in homogeneous CdS nucleation instead of heterogeneous, epitaxial CdS nucleation on CdSe, leading to broad and multimodal particle size distributions. Critically, obtained core/shell sizes are often below those desired. This article describes synthetic conditions specific to thick-shell growth (n {ge} 10 and n {ge} 20 MLs) on both small (sub2 nm) and large (>4.5 nm) CdSe cores. We find added secondary amine and low concentration of CdSe cores and molecular precursors give desired core/shell sizes. Amine-induced, partial etching of CdSe cores results in apparent shell-thicknesses slightly beyond those desired, especially for very-thick shells (n {ge} 20 MLs). Thermal ripening and fast precursor injection lead to undesired homogeneous CdS nucleation and incomplete shell growth. Core/shells derived from small CdSe (1.9 nm) have longer PL lifetimes and more pronounced blinking at single-particle level compared with those derived from large CdSe (4.7 nm). We expect our new synthetic approach will lead to a larger throughput of these materials, increasing their availability for fundamental studies and applications.

  9. Quasiparticle-vibration coupling in relativistic framework: shell structure of Z=120 isotopes

    E-Print Network [OSTI]

    Elena Litvinova

    2011-08-17

    For the first time, the shell structure of open-shell nuclei is described in a fully self-consistent extension of the covariant energy density functional theory. The approach implies quasiparticle-vibration coupling for superfluid systems. One-body Dyson equation formulated in the doubled quasiparticle space of Dirac spinors is solved for nucleonic propagators in tin isotopes which represent the reference case: the obtained energies of the single-quasiparticle levels and their spectroscopic amplitudes are in agreement with data. The model is applied to describe the shell evolution in a chain of superheavy isotopes $^{292,296,300,304}$120 and finds a rather stable proton spherical shell closure at Z = 120. An interplay of the pairing correlations and the quasiparticle-phonon coupling gives rise for a smooth evolution of the neutron shell gap between N = 172 and N = 184 neutron numbers. Vibrational corrections to the alpha decay energies reach several hundred keV and can be either positive and negative, thus also smearing the shell effects.

  10. Role of angular momentum and cosmic censorship in (2+1)-dimensional rotating shell collapse

    SciTech Connect (OSTI)

    Mann, Robert B.; Oh, John J.; Park, Mu-In

    2009-03-15

    We study the gravitational collapse problem of rotating shells in three-dimensional Einstein gravity with and without a cosmological constant. Taking the exterior and interior metrics to be those of stationary metrics with asymptotically constant curvature, we solve the equations of motion for the shells from the Darmois-Israel junction conditions in the corotating frame. We study various collapse scenarios with arbitrary angular momentum for a variety of geometric configurations, including anti-de Sitter, de Sitter, and flat spaces. We find that the collapsing shells can form a BTZ black hole, a three-dimensional Kerr-dS spacetime, and an horizonless geometry of point masses under certain initial conditions. For pressureless dust shells, the curvature singularity is not formed due to the angular momentum barrier near the origin. However when the shell pressure is nonvanishing, we find that for all types of shells with polytropic-type equations of state (including the perfect fluid and the generalized Chaplygin gas), collapse to a naked singularity is possible under generic initial conditions. We conclude that in three dimensions angular momentum does not in general guard against violation of cosmic censorship.

  11. Synthesis of zirconium tungstate-zirconia core-shell composite particles

    SciTech Connect (OSTI)

    Khazeni, Nasser; Mavis, Bora; Guenduez, Guengoer; Colak, Uner

    2011-11-15

    Highlights: {yields} ZrW{sub 2}O{sub 8}-ZrO{sub 2} core-shell particles to offer solutions for sintering problems. {yields} Core synthesis by a precursor based on tungstic acid and zirconium acetate. {yields} Shell phase by urea hydrolysis in the presence of zirconium ions. {yields} [Urea]/[ZrOCl{sub 2}] ratio controls the rate of shell precursor precipitation. -- Abstract: In this work, ZrW{sub 2}O{sub 8}-ZrO{sub 2} core-shell composite particles were synthesized. ZrW{sub 2}O{sub 8} that was used in the core is a material with negative coefficient of thermal expansion, and it was synthesized from a high-pH precursor based on use of tungstic acid and zirconium acetate. Shell layer was composed of ZrO{sub 2} nanocrystallites and precipitated from an aqueous solution by urea hydrolysis. While volume of the shell was effectively controlled by the initial zirconium ion concentration in the solutions, the rate of precipitation was a function of the ratio of initial concentrations of urea to zirconium ions. It is hypothesized that isolation of the ZrW{sub 2}O{sub 8} within a layer of ZrO{sub 2}, will be a key element in solving problems associated with reactivity of ZrW{sub 2}O{sub 8} towards other components in sintering of ceramic-ceramic composites with tuned or zero thermal expansion coefficient.

  12. Two Large HI Shells in the Outer Galaxy near l=279 degrees

    E-Print Network [OSTI]

    N. M. McClure-Griffiths; John M. Dickey; B. M. Gaensler; A. J. Green; R. F. Haynes; M. H. Wieringa

    2000-03-11

    As part of a survey of HI 21-cm emission in the Southern Milky Way, we have detected two large shells in the interstellar neutral hydrogen near l=279 deg. The center velocities are +36 and +59 km/s, which puts the shells at kinematic distances of 7 and 10 kpc. The larger shell is about 610 pc in diameter and very empty, with density contrast of at least 15 between the middle and the shell walls. It has expansion velocity of about 20 km/s and swept up mass of several million solar masses. The energy indicated by the expansion may be as high as 2.4 X 10^53 ergs. We estimate its age to be 15 to 20 million years. The smaller shell has diameter of about 400 pc, expansion velocity about 10 km/s and swept up mass of about 10^6 solar masses. Morphologically both regions appear to be shells, with high density regions mostly surrounding the voids, although the first appears to have channels of low density which connect with the halo above and below the HI layer. They lie on the edge of the Carina arm, which suggests that they may be expanding horizontally into the interarm region as well as vertically out of the disk. If this interpretation is correct, this is the first detection of an HI chimney which has blown out of both sides of the disk.

  13. Platinum-coated non-noble metal-noble metal core-shell electrocatalysts

    DOE Patents [OSTI]

    Adzic, Radoslav; Zhang, Junliang; Mo, Yibo; Vukmirovic, Miomir

    2015-04-14

    Core-shell particles encapsulated by a thin film of a catalytically active metal are described. The particles are preferably nanoparticles comprising a non-noble core with a noble metal shell which preferably do not include Pt. The non-noble metal-noble metal core-shell nanoparticles are encapsulated by a catalytically active metal which is preferably Pt. The core-shell nanoparticles are preferably formed by prolonged elevated-temperature annealing of nanoparticle alloys in an inert environment. This causes the noble metal component to surface segregate and form an atomically thin shell. The Pt overlayer is formed by a process involving the underpotential deposition of a monolayer of a non-noble metal followed by immersion in a solution comprising a Pt salt. A thin Pt layer forms via the galvanic displacement of non-noble surface atoms by more noble Pt atoms in the salt. The overall process is a robust and cost-efficient method for forming Pt-coated non-noble metal-noble metal core-shell nanoparticles.

  14. A Yolk-Shell Design for Stabilized and Scalable Li-Ion Battery Alloy Anodes

    SciTech Connect (OSTI)

    Liu, Nian; Wu, Hui; Mcdowell, Matthew T.; Yao, Yan; Wang, Chong M.; Cui, Yi

    2012-05-02

    Silicon is regarded as one of the most promising anode materials for next generation lithium-ion batteries. For use in practical applications, a Si electrode must have high capacity, long cycle life, high efficiency, and the fabrication must be industrially scalable. Here, we design and fabricate a yolk-shell structure to meet all these needs. The fabrication is carried out without special equipment and mostly at room temperature. Commercially available Si nanoparticles are completely sealed inside conformal, thin, self-supporting carbon shells, with rationally designed void space in between the particles and the shell. The well-defined void space allows the Si particles to expand freely without breaking the outer carbon shell, therefore stabilizing the solid-electrolyte interphase on the shell surface. High capacity (?2800 mAh/g at C/10), long cycle life (1000 cycles with 74% capacity retention), and high Coulombic efficiency (99.84%) have been realized in this yolk-shell structured Si electrode.

  15. Dual shell pressure balanced reactor vessel. Final project report

    SciTech Connect (OSTI)

    Robertus, R.J.; Fassbender, A.G.

    1994-10-01

    The Department of Energy`s Office of Energy Research (OER) has previously provided support for the development of several chemical processes, including supercritical water oxidation, liquefaction, and aqueous hazardous waste destruction, where chemical and phase transformations are conducted at high pressure and temperature. These and many other commercial processes require a pressure vessel capable of operating in a corrosive environment where safety and economy are important requirements. Pacific Northwest Laboratory (PNL) engineers have recently developed and patented (U.S. patent 5,167,930 December 1, 1992) a concept for a novel Dual Shell Pressure Balanced Vessel (DSPBV) which could solve a number of these problems. The technology could be immediately useful in continuing commercialization of an R&D 100 award-winning technology, Sludge-to-oil Reactor System (STORS), originally developed through funding by OER. Innotek Corporation is a small business that would be one logical end-user of the DSPBV reactor technology. Innotek is working with several major U.S. engineering firms to evaluate the potential of this technology in the disposal of wastes from sewage treatment plants. PNL entered into a CRADA with Innotek to build a bench-scale demonstration reactor and test the system to advance the economic feasibility of a variety of high pressure chemical processes. Hydrothermal processing of corrosive substances on a large scale can now be made significantly safer and more economical through use of the DSPBV. Hydrothermal chemical reactions such as wet-air oxidation and supercritical water oxidation occur in a highly corrosive environment inside a pressure vessel. Average corrosion rates from 23 to 80 miles per year have been reported by Rice (1994) and Latanision (1993).

  16. Single-shell tank closure work plan. Revision A

    SciTech Connect (OSTI)

    NONE

    1995-06-01

    In January 1994, the Hanford Federal Facility Agreement and Conset Order (Tri-Party Agreement) was amended to reflect a revised strategy for remediation of radioactive waste in underground storage tanks. These amendments include milestones for closure of the single-shell tank (SST) operable units, to be initiated by March 2012 and completed by September 2024. This SST-CWP has been prepared to address the principal topical areas identified in Tri-Party Agreement Milestone M-45-06 (i.e., regulatory pathway, operable unit characterization, waste retrieval, technology development, and a strategy for achieving closure). Chapter 2.0 of this SST-CWP provides a brief description of the environmental setting, SST System, the origin and characteristics of SST waste, and ancillary equipment that will be remediated as part of SST operable unit closure. Appendix 2A provides a description of the hydrogeology of the Hanford Site, including information on the unsaturated sediments (vadose zone) beneath the 200 Areas Plateau. Chapter 3.0 provides a discussion of the laws and regulations applicable to closure of the SST farm operable units. Chapter 4.0 provides a summary description of the ongoing characterization activities that best align with the proposed regulatory pathway for closure. Chapter 5.0 describes aspects of the SST waste retrieval program, including retrieval strategy, technology, and sequence, potential tank leakage during retrieval, and considerations of deployment of subsurface barriers. Chapter 6.0 outlines a proposed strategy for closure. Chapter 7.0 provides a summary of the programs underway or planned to develop technologies to support closure. Ca. 325 refs.

  17. Neutron shell structure and deformation in neutron-drip-line nuclei

    E-Print Network [OSTI]

    Ikuko Hamamoto

    2012-06-18

    Neutron shell-structure and the resulting possible deformation in the neighborhood of neutron-drip-line nuclei are systematically discussed, based on both bound and resonant neutron one-particle energies obtained from spherical and deformed Woods-Saxon potentials. Due to the unique behavior of weakly-bound and resonant neutron one-particle levels with smaller orbital angular-momenta $\\ell$, a systematic change of the shell structure and thereby the change of neutron magic-numbers are pointed out, compared with those of stable nuclei expected from the conventional j-j shell-model. For spherical shape with the operator of the spin-orbit potential conventionally used, the $\\ell_{j}$ levels belonging to a given oscillator major shell with parallel spin- and orbital-angular-momenta tend to gather together in the energetically lower half of the major shell, while those levels with anti-parallel spin- and orbital-angular-momenta gather in the upper half. The tendency leads to a unique shell structure and possible deformation when neutrons start to occupy the orbits in the lower half of the major shell. Among others, the neutron magic-number N=28 disappears and N=50 may disappear, while the magic number N=82 may presumably survive due to the large $\\ell =5$ spin-orbit splitting for the $1h_{11/2}$ orbit. On the other hand, an appreciable amount of energy gap may appear at N=16 and 40 for spherical shape, while neutron-drip-line nuclei in the region of neutron number above N=20, 40 and 82, namely N $\\approx$ 21-28, N $\\approx$ 41-54, and N $\\approx$ 83-90, may be quadrupole-deformed though the possible deformation depends also on the proton number of respective nuclei.

  18. Fe{sub 3}O{sub 4} and CdS based bifunctional core–shell nanostructure

    SciTech Connect (OSTI)

    Joseph, Joshy; Nishad, K.K.; Sharma, M.; Gupta, D.K.; Singh, R.R.; Pandey, R.K.

    2012-06-15

    Highlights: ? First report on a room temperature aqueous process for growth of a hybrid core shell nanostructure containing a magnetic core and a semiconducting shell. ? Formation of distinct core shell nanostructure revealed by high resolution transmission electron microscopy. ? A bifunctional nature combining magnetic as well as photoresponce for the as synthesised core shell nanostructures demonstrated. ? A tendency towards self organisation of the core–shell nanostructure. ? Possible applications including purification and isolation of biological materials, drug delivery system, bio-labels, spintronics, etc. -- Abstract: A room temperature solution process for synthesis of Fe{sub 3}O{sub 4} nanoparticles and their hybrid core shell nanostructures using CdS as the shell material has been described. The as grown particles have been characterised using XRD, Rietveld refinement, high resolution transmission electron microscopy, atomic force microscopy, superconducting quantum interference device, optical absorbance and photoluminescence spectroscopy. A superparamagnetic response revealed from the magnetisation measurements of the as synthesised magnetite nanoparticles was retained even after the growth of the CdS shell. From luminescence and high resolution atomic force microscopy measurements, it is shown that the core–shell structures advantageously combine magnetic as well as fluorescence response with a tendency towards self-organization.

  19. RCRA Assessment Plan for Single-Shell Tank Waste Management Area A-AX at the Hanford Site

    SciTech Connect (OSTI)

    Narbutovskih, Susan M.; Chou, Charissa J.

    2006-03-03

    This document describes a groundwater assessment plan for the single-shell tank systems in Waste Management Area A-AX at the Hanford Site.

  20. First Observations of Nonhydrodynamic Mix at the Fuel-Shell Interface in Shock-Driven Inertial Confinement Implosions

    SciTech Connect (OSTI)

    Rinderknecht, H. G.; Sio, H.; Li, C. K.; Zylstra, A. B.; Rosenberg, M. J.; Amendt, P.; Delettrez, J.; Bellei, C.; Frenje, J. A.; Gatu Johnson, M.; Seguin, F. H.; Petrasso, R. D.; Betti, R.; Glebov, V. Yu.; Meyerhofer, D. D.; Sangster, T. C.; Stoeckl, C.; Landen, O.; Smalyuk, V. A.; Wilks, S.; Greenwood, A.; Nikroo, A.

    2014-04-01

    A strong nonhydrodynamic mechanism generating atomic fuel-shell mix has been observed in strongly shocked inertial confinement fusion implosions of thin deuterated-plastic shells filled with 3He gas. These implosions were found to produce D3He-proton shock yields comparable to implosions of identical shells filled with a hydroequivalent 50:50 D3He gas mixture. Standard hydrodynamic mixing cannot explain this observation, as hydrodynamic modeling including mix predicts a yield an order of magnitude lower than was observed. Instead, these results can be attributed to ion diffusive mix at the fuel-shell interface.

  1. First Observations of Nonhydrodynamic Mix at the Fuel-Shell Interface in Shock-Driven Inertial Confinement Implosions

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

    Rinderknecht, H. G.; Sio, H.; Li, C. K.; Zylstra, A. B.; Rosenberg, M. J.; Amendt, P.; Delettrez, J.; Bellei, C.; Frenje, J. A.; Gatu Johnson, M.; Seguin, F. H.; Petrasso, R. D.; Betti, R.; Glebov, V. Yu.; Meyerhofer, D. D.; Sangster, T. C.; Stoeckl, C.; Landen, O.; Smalyuk, V. A.; Wilks, S.; Greenwood, A.; Nikroo, A.

    2014-04-01

    A strong nonhydrodynamic mechanism generating atomic fuel-shell mix has been observed in strongly shocked inertial confinement fusion implosions of thin deuterated-plastic shells filled with He 3 gas. These implosions were found to produce DHe 3 -proton shock yields comparable to implosions of identical shells filled with a hydroequivalent 50?50 DHe 3 gas mixture. Standard hydrodynamic mixing cannot explain this observation, as hydrodynamic modeling including mix predicts a yield an order of magnitude lower than was observed. Instead, these results can be attributed to ion diffusive mix at the fuel-shell interface.

  2. First Observations of Nonhydrodynamic Mix at the Fuel-Shell Interface in Shock-Driven Inertial Confinement Implosions

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

    Rinderknecht, H. G.; Sio, H.; Li, C. K.; Zylstra, A. B.; Rosenberg, M. J.; Amendt, P.; Delettrez, J.; Bellei, C.; Frenje, J. A.; Gatu Johnson, M.; et al

    2014-04-01

    A strong nonhydrodynamic mechanism generating atomic fuel-shell mix has been observed in strongly shocked inertial confinement fusion implosions of thin deuterated-plastic shells filled with 3He gas. These implosions were found to produce D3He-proton shock yields comparable to implosions of identical shells filled with a hydroequivalent 50:50 D3He gas mixture. Standard hydrodynamic mixing cannot explain this observation, as hydrodynamic modeling including mix predicts a yield an order of magnitude lower than was observed. Instead, these results can be attributed to ion diffusive mix at the fuel-shell interface.

  3. Controllable synthesis and characterization of novel copper-carbon core-shell structured nanoparticles

    SciTech Connect (OSTI)

    Zhai, Jing; Research Center of the Ministry of Education for High Gravity Engineering and Technology, Beijing University of Chemical Technology, No. 15 Beisanhuan Dong Lu, Beijing 100029 ; Tao, Xia; Pu, Yuan; Zeng, Xiao-Fei; Chen, Jian-Feng

    2011-06-15

    Highlights: {yields} We reported a facile, green and cheap hydrothermal method to obtain novel copper-carbon core-shell nanoparticles. {yields} The as-formed particles with controllable size and morphology are antioxidant. {yields} The particles with organic-group-loaded surfaces and protective shells are expected to be applied in fields of medicine, electronics, sensors and lubricant. -- Abstract: A facile hydrothermal method was developed for preparing copper-carbon core-shell structured particles through a reaction at 160 {sup o}C in which glucose, copper sulfate pentahydrate and cetyltrimethylammonium bromide were used as starting materials. The original copper-carbon core-shell structured particles obtained were sized of 100-250 nm. The thickness of carbonaceous shells was controlled ranging from 25 to 100 nm by adjusting the hydrothermal duration time and the concentrations of glucose in the process. Products were characterized with transmission electron microscopy, X-ray diffraction, energy dispersive spectroscopy, Fourier transform infrared spectroscopy. Since no toxic materials were involved in the preparation, particles with stable carbonaceous framework and reactive surface also showed promising applications in medicine, electronics, sensors, lubricant, etc.

  4. Acceleration of particles and shells by Reissner-Nordström naked singularities

    E-Print Network [OSTI]

    Mandar Patil; Pankaj S. Joshi; Masashi Kimura; Ken-ichi Nakao

    2012-09-20

    We explore the Reissner-Nordstr\\"{o}m naked singularities with a charge $Q$ larger than its mass $M$ from the perspective of the particle acceleration. We first consider a collision between two test particles following the radial geodesics in the Reissner-Nordstr\\"{o}m naked singular geometry. An initially radially ingoing particle turns back due to the repulsive effect of gravity in the vicinity of naked singularity. Such a particle then collides with an another radially ingoing particle. We show that the center of mass energy of collision taking place at $r \\approx M$ is unbound, in the limit where the charge transcends the mass by arbitrarily small amount $0naked singularity is around million years while it is many orders of magnitude larger than Hubble time in the black hole case. We then study the collision of the neutral spherically symmetric shells made up of dust particles. In this case, it is possible to treat the situation by exactly taking into account the gravity due to the shells using Israel`s thin shell formalism, and thus this treatment allows us to go beyond the test particle approximation. The center of mass energy of collision of the shells is then calculated in a situation analogous to the test particle case and is shown to be bounded above. However, we find thatthe energy of a collision between two of constituent particles of the shells at the center of mass frame can exceed the Planck energy.

  5. Discovery of Non-Thermal X-Rays from the Shell of RCW86

    E-Print Network [OSTI]

    Aya Bamba; Katsuji Koyama; Hiroshi Tomida

    2000-08-16

    We report the ASCA (Advanced Satellite for Cosmology and Astrophysics) results of RCW 86, a shell-like supernova remnant (SNR). The bright region in the X-ray band traces the radio clumpy shell, although details of the structure are different. The X-ray spectrum from each part of the shell can not be fitted to a thin thermal plasma model, but requires, at least three components: a low temperature plasma of 0.3 keV, high temperature plasma of > several keV, and a power-law component with a photon index = 3. The abundances of O, Ne, Mg and Si are significantly higher than that of Fe, indicating that RCW 86 is a type II SNR. The absorption column of 3e21 H cm^-2 indicates the distance to the SNR to be several kpc. The power-law component can be interpreted to be synchrotron radiation of high energy electrons. Assuming energy density equipartition between the magnetic field and the electrons, and using the radio and X-ray spectra, we argue that high energy electrons are accelerated up to 20 TeV. The acceleration efficiency is, however, different from shell to shell.

  6. The effect of mix on capsule yields as a function of shell thickness and gas fill

    SciTech Connect (OSTI)

    Bradley, P. A.

    2014-06-15

    An investigation of direct drive capsules with different shell thicknesses and gas fills was conducted to examine the amount of shock induced (Richtmyer-Meshkov) mix versus Rayleigh-Taylor mix from deceleration of the implosion. The RAGE (Eulerian) code with a turbulent mix model was used to model these capsules for neutron yields along with time-dependent mix amounts. The amount of Richtmyer-Meshkov induced mix from the shock breaking out of the shell is about 0.1??g (0.15??m of shell material), while the Rayleigh-Taylor mix is of order 1??g and determines the mixed simulation yield. The simulations were able to calculate a yield over mix (YOM) ratio (experiment/mix simulation) between 0.5 and 1.0 for capsules with shell thicknesses ranging from 7.5 to 20??m and with gas fills between 3.8 and 20?atm of D{sub 2} or DT. The simulated burn averaged T{sub ion} values typically lie with 0.5?keV of the data, which is within the measurement error. For capsules with shell thicknesses >25??m, the YOM values drop to 0.10?±?0.05, suggesting that some unmodeled effect needs to be accounted for in the thickest capsules.

  7. Adsorption of gold cyanide complexes by activated carbon on non-coconut shell origin

    SciTech Connect (OSTI)

    Yalcin, M.; Arol, A.I. [Middle East Technical Univ., Ankara (Turkey). Mining Engineering Dept.

    1995-12-31

    Coconut shells are the most widely used raw material for the production of activated carbon used in the gold production by cyanide leaching. There have been efforts to find alternatives to coconut shells. Shells and stones of certain fruits, have been tested. Although promising results to some extent were obtained, coconut shells remain the main source of activated carbon. Turkey has become a country of interest in terms of gold deposits of epithermal origin. Four deposits have already been discovered and, mining and milling operations are expected to start in the near future. Explorations are underway in many other areas of high expectations. Turkey is also rich in fruits which can be a valuable source of raw material for activated carbon production. In this study, hazelnut shells, peach and apricot stones, abundantly available locally, have been tested to determine whether they are suitable for the gold metallurgy. Parameters of carbonization and activation have been optimized. Gold loading capacity and adsorption kinetics have been studied.

  8. Supernovae from direct collisions of white dwarfs and the role of helium shell ignition

    E-Print Network [OSTI]

    Papish, Oded

    2015-01-01

    Models for supernovae (SNe) arising from thermonuclear explosions of white dwarfs (WDs) have been extensively studied over the last few decades, mostly focusing on the single degenerate (accretion of material of a WD) and double degenerate (WD-WD merger) scenarios. In recent years it was suggested that WD-WD direct collisions provide an additional channel for such explosions. Here we extend the studies of such explosions, and explore the role of Helium-shells in affecting the thermonuclear explosions. We study both the impact of low-mass helium ($\\sim0.01$ M$_{\\odot})$ shells, as well as high mass shells ($\\ge0.1$ M$_{\\odot}$). We find that detonation of the massive helium layers precede the detonation of the WD Carbon-Oxygen (CO) bulk during the collision and can change the explosive evolution and outcomes for the cases of high mass He-shells. In particular, the He-shell detonation propagates on the WD surface and inefficiently burns material prior to the CO detonation that later follows in the central parts...

  9. Enrico Fermi Awards Ceremony for Dr. Allen J. Bard and Dr. Andrew Sessler, February 2014 (Presentations, including remarks by Energy Secretary, Dr. Ernest Moniz)

    ScienceCinema (OSTI)

    Moniz, Ernest [U.S. Energy Secretary

    2014-08-22

    The Fermi Award is a Presidential award and is one of the oldest and most prestigious science and technology honors bestowed by the U.S. Government. On February 3, 2014 it was conferred upon two exceptional scientists. The first to be recognized is Dr. Allen J. Bard, 'for international leadership in electrochemical science and technology, for advances in photoelectrochemistry and photocatalytic materials, processes, and devices, and for discovery and development of electrochemical methods including electrogenerated chemiluminescence and scanning electrochemical microscopy.' The other honoree is Dr. Andrew Sessler, 'for advancing accelerators as powerful tools of scientific discovery, for visionary direction of the research enterprise focused on challenges in energy and the environment, and for championing outreach and freedom of scientific inquiry worldwide.' Dr. Patricia Dehmer opened the ceremony, and Dr. Ernest Moniz presented the awards.

  10. Shell formation in short like-charged polyelectrolytes in a harmonic trap

    E-Print Network [OSTI]

    Sandipan Dutta; Y. S. Jho

    2015-11-12

    Inspired by recent experiments on pattern formation in biomolecules by optical tweezers, a the- oretical description based on reference interaction site model (RISM) integral equation method is developed to calculate the equilibrium density profiles of small polyelectrolytes in an external po- tential. The formalism is applied to the specific case of a finite number of polyelectrolytes trapped in a harmonic potential. The density profiles of flexible Gaussian and rigid rodlike polyelectrolytes are studied over a range of lengths and numbers of polyelectrolytes in the trap and the Coulomb coupling parameter. For smaller polymers we recover the results for point charges. In the mean field limit the point particles do not form shells for any values of the coupling parameter whereas the longer polymers form a shell at the boundary at moderate coupling. When the inter-polymer cor- relations are included the density profile of the polymers shows sharp shells even at weak coupling. The implications of these results are also discussed.

  11. Tunable multiple Fano resonances in magnetic single-layered core-shell particles

    E-Print Network [OSTI]

    Arruda, Tiago Jose; Pinheiro, Felipe Arruda

    2015-01-01

    We investigate multiple Fano, comblike scattering resonances in single-layered, concentric core-shell nanoparticles composed of magnetic materials. Using the Lorenz-Mie theory, we derive, in the long-wavelength limit, an analytical condition for the occurrence of comblike resonances in the single scattering by coated spheres. This condition establishes that comblike scattering response uniquely depends on material parameters and thickness of the shell, provided that it is magnetic and thin compared to the scatterer radius. We also demonstrate that comblike scattering response shows up beyond the long-wavelength limit and it is robust against absorption. Since multiple Fano resonances are shown to depend explicitly on the magnetic permeability of the shell, we argue that both the position and profile of the comblike, morphology-dependent resonances could be externally tuned by exploiting the properties of engineered magnetic materials.

  12. Hanford Double-Shell Tank Inspection Annual Report Calendar Year 2012

    SciTech Connect (OSTI)

    Petermann, Tasha M.; Boomer, Kayle D.; Washenfelder, D. J.

    2013-12-02

    The double-shell tanks (DSTs) were constructed between 1968 and 1986. They will have exceeded their design life before the waste can be removed and trasferred to the Waste Treatment and Immobilization Plant for vitrification. The Double-Shell Tank Integrity Project has been established to evaluate tank aging, and ensure that each tank is structurally sound for continued use. This is the first issue of the Double-Shell Tank Inspection Annual Report. The purpose of this issue is to summarize the results of DST inspections conducted from the beginnng of the inspection program through the end of CY2012. Hereafter, the report will be updated annually with summaries of the past year's DST inspection activities.

  13. Average M shell fluorescence yields for elements with 70?Z?92

    SciTech Connect (OSTI)

    Kahoul, A.; Deghfel, B.; Aylikci, V.; Aylikci, N. K.; Nekkab, M.

    2015-03-30

    The theoretical, experimental and analytical methods for the calculation of average M-shell fluorescence yield (?{sup ¯}{sub M}) of different elements are very important because of the large number of their applications in various areas of physical chemistry and medical research. In this paper, the bulk of the average M-shell fluorescence yield measurements reported in the literature, covering the period 1955 to 2005 are interpolated by using an analytical function to deduce the empirical average M-shell fluorescence yield in the atomic range of 70?Z?92. The results were compared with the theoretical and fitted values reported by other authors. Reasonable agreement was typically obtained between our result and other works.

  14. Low Momentum Nucleon-Nucleon Interactions and Shell-Model Calculations

    E-Print Network [OSTI]

    L. Coraggio; A. Covello; A. Gargano; N. Itaco; D. R. Entem; T. T. S. Kuo; R. Machleidt

    2007-01-23

    In the last few years, the low-momentum nucleon-nucleon (NN) interaction V-low-k derived from free-space NN potentials has been successfully used in shell-model calculations. V-low-k is a smooth potential which preserves the deuteron binding energy as well as the half-on-shell T-matrix of the original NN potential up to a momentum cutoff Lambda. In this paper we put to the test a new low-momentum NN potential derived from chiral perturbation theory at next-to-next-to-next-to-leading order with a sharp low-momentum cutoff at 2.1 fm-1. Shell-model calculations for the oxygen isotopes using effective hamiltonians derived from both types of low-momentum potential are performed. We find that the two potentials show the same perturbative behavior and yield very similar results.

  15. Diffusive Shock Acceleration of Electrons and Radio Emission from Large Diameter Shell-Type Supernova Remnants

    E-Print Network [OSTI]

    A. I. Asvarov

    2000-01-21

    In present study I examine the capability of diffusive shock acceleration mechanism to explain existing data on radio emission from evolved large diameter shell-type adiabatic supernova remnants (SNRs). Time-dependent ''onion-shell'' model for the radio emission of SNRs is developed, which is based on the assumptions: a) acceleration takes place from thermal energies and test-particle approximation is valid; b) the problem of injection is avoided by introducing, like Bell (1978), two injection parameters; c) to take into consideration very late stages of SNR evolution the analytic approximation of Cox and Andersen (1982) for the shell structure is used; c)no radiative cooling. Constructed Surface Brightness - Diameter $(\\Sigma -D)$ tracks are compared with the empirical $\\Sigma -D$ diagram. The main conclusion of the study is that the DSA mechanism is capable of explaining all the statistics of radio SNRs including very large diameter remnants and giant galactic loops.

  16. A Survey of Vapors in the Headspaces of Single-Shell Waste Tanks

    SciTech Connect (OSTI)

    Stock, Leon M.; Huckaby, James L.

    2000-10-31

    This report summarizes data on the organic vapors in the single-shell high level radioactive waste tanks at the Hanford site to support a forthcoming toxicological study. All data were obtained from the Tank Characterization Database (PNNL 1999). The TCD contains virtually all the available tank headspace characterization data from 1992 to the present, and includes data for 109 different single-shell waste tanks. Each single-shell tank farm and all major waste types are represented. Descriptions of the sampling and analysis methods have been given elsewhere (Huckaby et al. 1995, Huckaby et al. 1996), and references for specific data are available in the TCD. This is a revision of a report with the same title issued on March 1, 2000 (Stock and Huckaby 2000).

  17. Challenges for a reliable shell model description of the neutrinoless double beta decay matrix elements

    SciTech Connect (OSTI)

    Horoi, Mihai [Department of Physics, Central Michigan University, Mount Pleasant, Michigan, 48859 (United States)

    2011-12-16

    Assuming that the neutrinos are Majorana particles and the neutrinoless double beta (0{nu}{beta}{beta}) decay is observed, a reliable 0{nu}{beta}{beta} matrix element is necessary to decide the neutrino mass hierarchy and the minimum neutrino mass. Many nuclear structure techniques, including the shell model, are presently used to calculate these matrix elements. In the last few years one could see a slow convergence of these results, but not yet at a level of 20 several shell model effective interactions and varying other parameters, finding results in a range that spans about 20In this contribution we describe challenges for obtaining reliable shell model 0{nu}{beta}{beta} matrix elements, with emphasis to {sup 76}Ge and {sup 82}Se decays.

  18. Preliminary design requirements document for the initial single-shell tank retrieval system

    SciTech Connect (OSTI)

    Hertzel, J.S., Westinghouse Hanford

    1996-07-24

    The scope of this Preliminary Design Requirements Document is to identify and define the functions, with associated requirements, which must be performed to demonstrate and accomplish the initial single-shell tank saltcake retrieval from selected tanks. This document sets forth functions, requirements, performance requirements and design constraints necessary to begin conceptual design for the Initial Single-shell Tank Retrieval System. System and physical interfaces between the Initial Single-shell Tank Retrieval System project and the Tank Waste Remediation are identified. The constraints, performance requirements, and transfer of information and data across a technical interface will be documented in an Interface Control Document. The design requirements provided in this document will be augmented by additional detailed design to be documented by the project.

  19. Numerical simulations of multi-shell plasma twisters in the solar atmosphere

    E-Print Network [OSTI]

    Murawski, K; Musielak, Z E; Dwivedi, B N

    2015-01-01

    We perform numerical simulations of impulsively generated Alfv\\'en waves in an isolated photospheric flux tube, and explore the propagation of these waves along such magnetic structure that extends from the photosphere, where these waves are triggered, to the solar corona, and analyze resulting magnetic shells. Our model of the solar atmosphere is constructed by adopting the temperature distribution based on the semi-empirical model and specifying the curved magnetic field lines that constitute the magnetic flux tube which is rooted in the solar photosphere. The evolution of the solar atmosphere is described by 3D, ideal magnetohydrodynamic equations that are numerically solved by the FLASH code. Our numerical simulations reveal, based on the physical properties of the multi-shell magnetic twisters and the amount of energy and momentum associated with them, that these multi-shell magnetic twisters may be responsible for the observed heating of the lower solar corona and for the formation of solar wind. Moreov...

  20. Experimental buckling investigation of ring-stiffened cyclindrical shells under unsymmetrical axial loads

    SciTech Connect (OSTI)

    Baker, W.E.; Bennett, J.G.; Babcock, C.D.

    1983-01-01

    Six steel shells having nuclear containment-like features were fabricated and loaded to failure with an offset axial load. The shells of R/t = 500 buckled plastically. Four of the shells had reinforced circular cutouts. These penetrations were sized to cut no ring-stiffener, a single, two- or three-ring stiffeners. Reinforcing and framing around the penetrations were based upon the area-replacement rule of the applicable portion of the American Society for Mechanical Engineers (ASME) Boiler and Pressure Vessel Code and were of a design to simulate actual practice for nuclear steel containments. Prior to testing, imperfections were measured and strain gages were applied to determine information on load distribution at the ends of the cylinder and strain fields at areas likely to buckle. Buckling loads were determined for an axial load applied with an eccentricity of R/2 where R is the cylinder radius.

  1. Ab Initio Study of 40Ca with an Importance Truncated No-Core Shell Model

    SciTech Connect (OSTI)

    Roth, R; Navratil, P

    2007-05-22

    We propose an importance truncation scheme for the no-core shell model, which enables converged calculations for nuclei well beyond the p-shell. It is based on an a priori measure for the importance of individual basis states constructed by means of many-body perturbation theory. Only the physically relevant states of the no-core model space are considered, which leads to a dramatic reduction of the basis dimension. We analyze the validity and efficiency of this truncation scheme using different realistic nucleon-nucleon interactions and compare to conventional no-core shell model calculations for {sup 4}He and {sup 16}O. Then, we present the first converged calculations for the ground state of {sup 40}Ca within no-core model spaces including up to 16{h_bar}{Omega}-excitations using realistic low-momentum interactions. The scheme is universal and can be easily applied to other quantum many-body problems.

  2. “Smart” Diblock Copolymers as Templates for Magnetic-Core Gold-Shell Nanoparticle Synthesis

    SciTech Connect (OSTI)

    Nash, Michael A.; Lai, James J.; Hoffman, Allan S.; Yager, Paul; Stayton, Partick S.

    2010-01-13

    We report a new strategy for synthesizing temperature-responsive ?-Fe2O3-core/Au-shell nanoparticles (Au-mNPs) from diblock copolymer micelles. The amphiphilic diblock copolymer chains were synthesized using reversible addition-fragmentation chain-transfer (RAFT) with a thermally responsive “smart” poly(N-isopropylacrylamide) (pNIPAAm) block and an amine-containing poly(N,N-dimethylaminoethylacrylamide) (DMAEAm) block that acted as a reducing agent during gold shell formation. The Au-mNPs reversibly aggregated upon heating the solution above the transition temperature of pNIPAAm, resulting in a red-shifted localized surface plasmon resonance.

  3. Fifth Single-Shell Tank Integrity Project Expert Panel Meeting August 28-29, 2014

    SciTech Connect (OSTI)

    Martin, Todd M.; Gunter, Jason R.; Boomer, Kayle D.

    2015-01-07

    On August 28th and 29th, 2014 the Single-Shell Tank Integrity Project (SSTIP) Expert Panel (Panel) convened in Richland, Washington. This was the Panel’s first meeting since 2011 and, as a result, was focused primarily on updating the Panel on progress in response to the past recommendations (Single-Shell Tank Integrity Expert Panel Report, RPP-RPT-45921, Rev 0, May 2010). This letter documents the Panel’s discussions and feedback on Phase I activities and results.

  4. Projected shell model study of neutron-rich deformed isotopes of Sr and Zr

    SciTech Connect (OSTI)

    Verma, Sonia; Dar, Parvaiz Ahmad; Devi, Rani [Department of Physics and Electronics, University of Jammu, Jammu-180006 (India)

    2008-02-15

    The projected shell model (PSM) study of {sup 98-102}Sr and {sup 100-104}Zr nuclei is carried out. The reliability of the ground-state wave function is checked by reproducing yrast spectra and electromagnetic properties. The mechanism for the onset of sudden and large deformation at N=60 is worked out. The present piece of research work has unified the two different, or conflicting, early explanations for the onset of deformation at N=60 by the spherical shell model and mean-field theory.

  5. Scaling laws, transient times and shell effects in helium induced nuclear fission

    E-Print Network [OSTI]

    Th. Rubehn; K. X. Jing; L. G. Moretto; L. Phair; K. Tso; G. J. Wozniak

    1996-07-22

    Fission excitation functions of He-3 and He-4 induced compound nuclei are shown to scale exactly according to the Bohr-Wheeler transition state prediction once the shell effects are accounted for. The presented method furthermore allows one to model-independently extract values for the shell effects which are in good agreement to those obtained from liquid-drop model calculations. The fact that no deviations from the transition state method have been observed within the experimentally investigated excitation energy regime allows one to assign an upper limit for the transient time of 10 zs.

  6. A computer procedure for evaluating the effects of loading thin isotropic shells of revolution 

    E-Print Network [OSTI]

    Petersen, Gary Stanley

    1968-01-01

    A COtlPUTER PROCEDURI FOR 1'VALUATING THE I. 'F1"L'CTS OF LOADING T11IN ISOTROPIC SHELLS OF REVOLUTION A Thesis GARY STANLEY PETERSEN Submitted to tne Graduate College oi' the Texas AeM University in partial fulfillment of tne requirements... for the degree of MASTER OF SCIENCE January 19oG MaJor Subject: Computer Science A COiviPUTER PROCLDURE FOR EVALUATING THE EFFECTS OF LOADLNG THIN ISO'IROPIC SHELLS OF RDOLUTION A Thesis by GARY STANLEY PETERSFN Approved as to style and content, by...

  7. Nuclear Level Density of ${}^{161}$Dy in the Shell Model Monte Carlo Method

    E-Print Network [OSTI]

    Cem Özen; Yoram Alhassid; Hitoshi Nakada

    2012-06-27

    We extend the shell-model Monte Carlo applications to the rare-earth region to include the odd-even nucleus ${}^{161}$Dy. The projection on an odd number of particles leads to a sign problem at low temperatures making it impractical to extract the ground-state energy in direct calculations. We use level counting data at low energies and neutron resonance data to extract the shell model ground-state energy to good precision. We then calculate the level density of ${}^{161}$Dy and find it in very good agreement with the level density extracted from experimental data.

  8. Metal enhanced fluorescence in rare earth doped plasmonic core-shell nanoparticles

    E-Print Network [OSTI]

    Derom, S; Pillonnet, A; Benamara, O; Jurdyc, A M; Girard, C; Francs, G Colas des

    2013-01-01

    We theoretically and numerically investigate metal enhanced fluorescence of plasmonic core-shell nanoparticles doped with rare earth (RE) ions. Particle shape and size are engineered to maximize the average enhancement factor (AEF) of the overall doped shell. We show that the highest enhancement (11 in the visible and 7 in the near-infrared) are achieved by tuning either the dipolar or quadrupolar particle resonance to the rare earth ions excitation wavelength. Additionally, the calculated AEFs are compared to experimental data reported in the literature, obtained in similar conditions (plasmon mediated enhancement) or when a metal-RE energy transfer mechanism is involved.

  9. Static internal pressure capacity of Hanford Single-Shell Waste Tanks

    SciTech Connect (OSTI)

    Julyk, L.J.

    1994-07-19

    Underground single-shell waste storage tanks located at the Hanford Site in Richland, Washington, generate gaseous mixtures that could be ignited, challenging the structural integrity of the tanks. The structural capacity of the single-shell tanks to internal pressure is estimated through nonlinear finite-element structural analyses of the reinforced concrete tank. To determine their internal pressure capacity, designs for both the million-gallon and the half-million-gallon tank are evaluated on the basis of gross structural instability.

  10. Andrew S. Toms

    E-Print Network [OSTI]

    The isomorphism relation for separable C*-algebras [pdf] (with G. A. Elliott, I. ... International Mathematics Research Notices (accepted), 20p. On the structure of

  11. SUSTAINABLE ENERGY Andrew Blakers

    E-Print Network [OSTI]

    Climate change is a major issue. Energy efficiency, renewable energy, carbon capture & storage ("clean coal"), afforestation and other measures all need to be harnessed to solve the problem. None

  12. Mr. Andrew Wallo, III

    Office of Legacy Management (LM)

    of the source or sources of elevated concentrations of thorium and radium discovered on properties in the vicinity of the Bendix Plant described in the ORNL letter of December...

  13. Markov Decision Andrew Schaefer

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    maximize expected profit over the next year Simplifying Assumptions Instantaneous delivery No backlogging is for j units holding cost sales income amount sold #12;13 4. Rewards: rt(st,at) Expected immediate net income associated with taking a particular action, in a particular state, in a particular epoch analogous

  14. Parris Khachi Andrew Manoske

    E-Print Network [OSTI]

    Eirinaki, Magdalini

    , carbon footprint of computer systems over time. ­ Power draw changes based off of both how we use individuals and organizations with the information they need to minimize their computing carbon footprint that capture carbon footprint. #12;Why Tesla is the fastest gun in the west: · Hardwareagnostic Windows client

  15. Zijun Zhang Andrew Kusiak

    E-Print Network [OSTI]

    Kusiak, Andrew

    Vibration Based on SCADA Data Three models for detecting abnormalities of wind turbine vibrations reflected- quisition (SCADA) data collected at various wind turbines. The vibration of a wind turbine is characterized of a control chart. SCADA vibration data sampled at 10 s intervals reflects normal and faulty status of wind

  16. Haiyang Zheng Andrew Kusiak

    E-Print Network [OSTI]

    Kusiak, Andrew

    of wind farms is usually balanced by the power produced by the traditional power plants to meet the grid for balancing a wind power was investigated. Potter and Negnevitsky 4 applied an adaptive-neuron-fuzzy in Engineering, 3131 Seamans Center, University of Iowa, Iowa City, IA 52242-1527 Prediction of Wind Farm Power

  17. Andrew S. Toms

    E-Print Network [OSTI]

    International Mathematics Research Notices (accepted), 27p. Turbulence, orbit equivalence, and the classification of nuclear C*-algebras [pdf] (with I. Farah and

  18. SOLAR ENERGY Andrew Blakers

    E-Print Network [OSTI]

    utilised by photovoltaics and solar heat is hundreds of times larger than all other energy resources quantities; and · has minimal environmental impact over unlimited time scales. No other energy source can (photovoltaics and solar heat) and indirect forms such as biomass, wind, hydro, ocean thermal and waves

  19. Interview of Andrew Vayda

    E-Print Network [OSTI]

    Vayda, Andrew

    2010-01-01

    ?3?:?2?1?:?0?0?Z??/?o?:?C?r?e?a?t?e?d?>? ? ? ? ??o?:?L?a?s?t?S?a?v?e?d?>?2?0?1?1?-?0?4?-?1?8?T?0?3?:?2?1?:?0?0?Z??/?o?:?L?a?s?t?S?a?v?e?d?>? ? ? ? ??o?:?P?a?g?e?s?>?1??/?o?:?P?a?g?e?s?>? ? ? ? ??o?:?W?o?r?d?s?>?4?5?4?2??/?o?:?W?o?r?d?s?>? ? ? ? ??o?:?C... ?h?a?r?a?c?t?e?r?s?>?2?5?8?9?3??/?o?:?C?h?a?r?a?c?t?e?r?s?>? ? ? ? ??o?:?C?o?m?p?a?n?y?>?T?h?e? ?U?n?i?v?e?r?s?i?t?y? ?o?f? ?A?r?i?z?o?n?a??/?o?:?C?o?m?p?a?n?y?>? ? ? ? ??o?:?L?i?n?e?s?>?2?1?5??/?o?:?L?i?n?e?s?>? ? ? ? ??o?:?P?a?r?a?g?r?a?p?h?s?>?6?0??/?o?:?P...

  20. Anoop Verma Andrew Kusiak

    E-Print Network [OSTI]

    Kusiak, Andrew

    to monitor performance of wind turbines [9­11]. Other applications of data- mining in wind energy include: (1 Turbine Generator Brushes: A Data-Mining Approach Components of wind turbines are subjected to asymmetric loads caused by variable wind conditions. Carbon brushes are critical components of the wind turbine