Sample records for amb amb amb

  1. E-Print Network 3.0 - ambe waste minimization Sample Search Results

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

    precissio, i els coeficients de b amb error maxim 10-3 , com calcularieu amb Matlab una cota per l... cobrint l'interval 1,2, i dibuixar amb ells el graf de f(x) per x...

  2. Amb. Linton Brooks Sworn in as NNSA Administrator | National Nuclear

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OFFuelsPropaneSecurity Administration Amb. Linton

  3. AMB Apparate Maschinenbau GmbH | 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 Office of Inspector GeneralDepartmentAUDIT REPORT Americium/Curium Vitrification Project AtOpenLabsEspanaAL PRO JumpAMB

  4. E-Print Network 3.0 - americium-beryllium ambe source Sample...

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

    for: americium-beryllium ambe source Page: << < 1 2 3 4 5 > >> 1 FINAL REPORT Task Order 1345 Summary: density and water content are typically measured with an...

  5. Preparació i caracterització d'aerogels nanocomposats amb metalls. Aplicacions en catàlisi.

    E-Print Network [OSTI]

    Martínez Crespiera, Sandra

    2006-01-01T23:59:59.000Z

    ??En la present tesi doctoral es descriu la preparació de diferents tipus d'aerogels (aerogels de sílice, híbrids orgànic-inorgànics, orgànics i de carbó) nanocomposats amb ferro,… (more)

  6. AUTONOMOUS MOBILE BUOY (A-M-B) COASTAL & LAGOON: autonomous monitoring and sampling

    E-Print Network [OSTI]

    Wood, Stephen L.

    AUTONOMOUS MOBILE BUOY (A-M-B) COASTAL & LAGOON: autonomous monitoring and sampling PI: Stephen, goals and objectives The project objective of this proposal is to develop an Autonomous Mobile Buoy student built instrumentation and autonomous/remotely operated vehicles that will be deployed, monitored

  7. Fundaci General de la UIB (FuGUIB) La Fundaci General de la Universitat de les Illes Balears (FuGUIB) s una instituci privada, amb

    E-Print Network [OSTI]

    Oro, Daniel

    GUIB) és una institució privada, amb personalitat jurídica pròpia i sense ànim de lucre. Va ser creada per infraestructures esportives. Aquesta inversió s'ha materialitzat principalment en les següents accions: Inversions

  8. Characterization of a Sealed Americium-Beryllium (AmBe) Source by Inductively Coupled Plasma Mass Spectrometry

    SciTech Connect (OSTI)

    James Sommers; Marcos Jimenez; Mary Adamic; Jeffrey Giglio; Kevin Carney

    2009-12-01T23:59:59.000Z

    Two Americium-Beryllium neutron sources were dismantled, sampled (sub-sampled) and analyzed via inductively coupled plasma mass spectrometry (ICP-MS). Characteristics such as “age” since purification, actinide content, trace metal content and inter and intra source composition were determined. The “age” since purification of the two sources was determined to be 25.0 and 25.4 years, respectively. The systematic errors in the “age” determination were ± 4 % 2s. The amount and isotopic composition of U and Pu varied substantially between the sub-samples of Source 2 (n=8). This may be due to the physical means of sub-sampling or the way the source was manufactured. Source 1 was much more consistent in terms of content and isotopic composition (n=3 sub-samples). The Be-Am ratio varied greatly between the two sources. Source 1 had an Am-Be ratio of 6.3 ± 52 % (1s). Source 2 had an Am-Be ratio of 9.81 ± 3.5 % (1s). In addition, the trace element content between the samples varied greatly. Significant differences were determined between Source 1 and 2 for Sc, Sr, Y, Zr, Mo, Ba and W.

  9. 12.2. Fundaci General de la UIB (FuGUIB) La Fundaci General de la Universitat de les Illes Balears (FuGUIB) s una instituci privada, amb

    E-Print Network [OSTI]

    Oro, Daniel

    Balears (FuGUIB) és una institució privada, amb personalitat jurídica pròpia i sense ànim de lucre. Va ser les següents accions principals: #12;- Substitució de la gespa i sistema de reg del camp de futbol

  10. 14.2. Fundaci General de la UIB (FuGUIB) La Fundaci General de la Universitat de les Illes Balears (FuGUIB) s una instituci privada, amb

    E-Print Network [OSTI]

    Oro, Daniel

    Balears (FuGUIB) és una institució privada, amb personalitat jurídica pròpia i sense ànim de lucre. Va ser'ha materialitzat en les accions principals següents: -- Reparació integral de les pistes de pàdel i instal·lació de

  11. La universitat amb ms mobilitat

    E-Print Network [OSTI]

    Geffner, Hector

    lloc, un any més, al Palau de la Música Catalana. Més de mil cinc-cents titulats van desfi- lar per l

  12. DOE - Office of Legacy Management -- AMB

    Office of Legacy Management (LM)

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou are here Home » Sites » Sites PendingHomeNew

  13. DOE - Office of Legacy Management -- AMB

    Office of Legacy Management (LM)

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou areDowntown Site -MiamiYVE r.x-L* ..-*..OOELast

  14. Microsoft Word - AMB 2008-final.doc

    Office of Legacy Management (LM)

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "ofEarlyEnergyDepartment ofDepartment ofof EnergyYou$ EGcGand Surface Water Sampling ANNUAL

  15. Shielding of a 3600 curie AmBe source

    E-Print Network [OSTI]

    Grimes, Mary Jeanine

    2012-06-07T23:59:59.000Z

    by detector j, R(j, E) is the response response function of detector j vith respect to neutron energy, a(E) is the energy dependent neutron flux, and E2-El is the energy range of interest. Converting equation (20) into a matrix form results in (Schlapper... are the saae as for flux, neutrons/cm -sec. The parameter 2 Dg is the group diffusion coefficient. The aultigroup fora of the transport equation given in equation (6) can be integrated over all angles to obtain the balance equation given by DEL Jg(r) + Etg...

  16. ENERGIA E`OLICA La font d'energia amb el creixement mes gran

    E-Print Network [OSTI]

    Batiste, Oriol

    .lada: 48.000 MW Web World Wind energy Association http://www.wwindea.org Web Associaci´o danesa de la ind = 1 2 mv2 Pot`encia P = dEk dt = 1 2 dm dt v2 dm dt = Sv P = 1 2 Sv3 #12;RECURSOS EOLICS 1-2% de l L'ENERGIA E`OLICA #12;MERCAT PER FABRICANTS #12;PARCS E`OLICS MARINS #12;

  17. enlaChampionsdelarecerca Amb22ajutsdelConsellEuropeuderecercaobtinguts,laUPFes

    E-Print Network [OSTI]

    Geffner, Hector

    retallades pressu- postàries que el Govern està aplicant en diferents àmbits. Enguany, la Universitat Pompeu

  18. am-be neutron source: Topics by E-print Network

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

    conjunction with a search for weakly interacting massive particle candidates for dark matter. The facility is used to study the response of CsI(Tl) crystals to nuclear recoils...

  19. am-be neutron sources: Topics by E-print Network

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

    conjunction with a search for weakly interacting massive particle candidates for dark matter. The facility is used to study the response of CsI(Tl) crystals to nuclear recoils...

  20. Regulation of motility, the cell cycle, and magnetosome formation in Magnetospirillum magneticum AMB-1

    E-Print Network [OSTI]

    Greene, Shannon Elizabeth

    2012-01-01T23:59:59.000Z

    r epair enzyme hypot het ical pr ot ein Nif Q pr ot ein f erhypot het ical pr ot ein Nif X pr ot ein nit r ogenasexU-like pr ot ein put at ive nif Z pr ot ein hypot het ical

  1. E-Print Network 3.0 - am-be isotopic neutron Sample Search Results

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

    2106533431 Large Scale Experimental Facilities at RRL Nuclear Research Reactor 5 MW power Neutron... Scattering Facilities ... Source: National Center for Scientific Research...

  2. E-Print Network 3.0 - ambs biography lhc Sample Search Results

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

    far).... the top quark... (Bs oscillations) The LHC will discover (perhaps)... the Higgs boson supersymmetric particles ... Source: Schmitt, Michael - Department of Physics and...

  3. E-Print Network 3.0 - ambe source neutron Sample Search Results

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

    IN PHYSICS RESEARCH Section A Theory of neutron fluctuations in source-driven subcritical systems... source 1. Introduction ... Source: Pzsit, Imre - Department of Reactor...

  4. E-Print Network 3.0 - am-be pgnaa set-up Sample Search Results

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

    Page: << < 1 2 3 4 5 > >> Page: << < 1 2 3 4 5 > >> 21 NOVEL Al2O3:C,Mg FLUORESCENT NUCLEAR TRACK DETECTORS FOR PASSIVE NEUTRON DOSIMETRY Summary: after irradiation with fast...

  5. Ambient Monitoring for Sinclair and Dyes Inlets, Puget Sound, Washington: Chemical Analyses for 2010 Regional Mussel Watch (AMB02)

    SciTech Connect (OSTI)

    Brandenberger, Jill M.; Kuo, Li-Jung; Suslick, Carolynn R.; Johnston, Robert K.

    2010-10-20T23:59:59.000Z

    The Puget Sound Naval Shipyard & Intermediate Maintenance Facility (PSNS&IMF) and Naval Base Kitsap-Bremerton (Shipyard) located in Bremerton, WA are committed to a culture of continuous process improvement for all aspects of Shipyard operations, including reducing the releases of hazardous materials and waste in discharges from the Shipyard. Under the Project ENVVEST Final Project Agreement, a cooperative project among PSNS&IMF, the Environmental Protection Agency (EPA), and the Washington State Department of Ecology (Ecology), and local stakeholders (US Navy, EPA and Ecology 2002) has been helping to improve the environmental quality of the Sinclair and Dyes Inlet Watershed (ENVVEST 2006). An ambient monitoring program for sediment, water, and indigenous mussels began in 2009 to assess the status and trend of ecological resources, assess the effectiveness of cleanup and pollution control measures, and determine if discharges from all sources are protective of beneficial uses including aquatic life. This document presents the 2010 chemical residue data and stable isotopes of carbon (?13C) and nitrogen (?15N) for the regional mussel watch stations located in Sinclair Inlet, Dyes Inlet, Port Orchard Passage, Rich Passage, Agate Passage, Liberty Bay, and Keyport Lagoon. Indigenous bivalves were collected from a small boat and/or from along the shoreline, measured, composited, and analyzed for a suite of trace metals and organic contaminants. The trace metals included silver, arsenic, cadmium, chromium, copper, mercury, nickel, lead, and zinc. The organic contaminants included the list of NOAA Status and Trends 20 polychlorinated biphenyls (PCB) congeners and suite of parent and methylated polycyclic aromatic hydrocarbons (PAHs). These chemical residue data provide the first year of the biota ambient monitoring.

  6. Investigadors de la UA participen en un projecte europeu per a disminuir l'emissi de gasos contaminants amb filtres ecolgics produts a partir de

    E-Print Network [OSTI]

    Escolano, Francisco

    un compost químic que ens protegeix de la radiació solar de major energia", indica Cazorla. Perquè es

  7. Cursos del Programa Aula Mentor Reconeguts amb crdits de formaci permanent del professorat segons BOE de 12/01/95. Els

    E-Print Network [OSTI]

    Oro, Daniel

    h Agricultura ecològica 60 h Energia de la radiació solar 50 h Energies renovables 130 h Energia solar tèrmica 100 h Energia solar fotovoltaica 70 h Medi ambient Avaluació de l'impacte ambiental 80 h

  8. CARACTERITZACI DE PLATAFORMES HW-SW PER A INTERACTIVITAT EN TV DIGITAL AMB MHP 1 Caracteritzaci de Plataformes HW-SW per a Interactivitat en TV

    E-Print Network [OSTI]

    Autònoma de Barcelona, Universitat

    així, des del punt de vista del consumidor de televisió, poc importa la tecnologia que hi ha al darrera-se moltes vegades a la tecnologia de consum. En aquest treball s'analitzen breument els punts crítics de la

  9. Anlisi de dades experimentals Salvador Balle L'objectiu fonamental d'aquest text s presentar de manera resumida i breu, amb

    E-Print Network [OSTI]

    Colet, Pere

    #12;Anàlisi de dades experimentals Salvador Bal·le L'objectiu fonamental d'aquest text és presentar en- coratjament per a elaborar-lo. Esporles, Agost 2006 #12;Anàlisi de dades experimentals Salvador ! " $ ! , * , % . ' & 4 5 6 7 . 8 2 -' ( 9 : / . #12;Anàlisi de dades experimentals Salvador Bal·le 0. Introducció Des de

  10. Bus interurb amb parada a la UIB Dues lnies interurbanes disposen de parada a la UIB: la Palma Port de Sller i la

    E-Print Network [OSTI]

    Oro, Daniel

    ­ Port de Sóller i la Palma ­ Estellencs. Resum de les dades de què disposem fins ara dels dos darrers,00 11 0,48 Universitat a Sóller 31 57 1,84 13 0,42 Universitat a Port de Sóller 36 21 0,58 0 0,00 Total 20092008 Demanda Línia IB-9 o L-210 Palma - Port de Sóller 2008 - 2009 #12;

  11. Memria del Pla d'actuacions per a l'any 2011 1. Introducci

    E-Print Network [OSTI]

    Oro, Daniel

    amb la consolidació dels sistemes de qualitat i medi ambient d'acord amb les normes ISO 9001:2008 i ISO 14001:2004. A tal

  12. de pensament i transcendncia

    E-Print Network [OSTI]

    Cuadras, Carles M.

    ideologies i creen- ces. amb propietat i fortuna variables. A favor de l`esclavatge (per les teories de P

  13. PRODUCTO / PRODUCTE BEBIDAS CALIENTES / BEGUDES CALENTES

    E-Print Network [OSTI]

    Escolano, Francisco

    avellana Descafeïnats: tallat, amb llet, capuchino Leche sola, manchado Llet sola, tacat 0,15 Té al limón

  14. 4/18/11 10:39 AMB.C. aspires to lead the country in research and development Page 1 of 6http://www.canada.com/story_print.html?id=713de69a-38b7-48a8-9d50-d96d0aa1142b&sponsor=

    E-Print Network [OSTI]

    -- video gaming, digital animation and Web production -- he added that B.C. is a globally known centre

  15. RapTOR-FINAL 2-7-12

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

    and unknown pathogens in clinical samples. To this end, RapTOR is developing a microfluidics-based automated molecular biology (AMB) platform that enables rapid and selective...

  16. The Search for Dark Matter in XENON100 using a Two-Dimensional Profile Likelihood Analysis

    E-Print Network [OSTI]

    Lung, Kevin J.

    2013-01-01T23:59:59.000Z

    for the simulated Americium Beryllium neutron source fromwere performed using an Americium-Beryllium (AmBe) source.input energy spectrum from Americium Beryllium decays (ISO

  17. E-Print Network 3.0 - automanejo del asma Sample Search Results

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

    del V... cada Dia, organitzat pel SAC, juntament amb la Reial Acadmia de Medicina i l'Associaci Balear d'Asma... 'educaci teraputica - Asma, activitat fsica i...

  18. BEBIDAS CALIENTES / BEGUDES CALENTES CAF SOLO / CAF SOL 0,77

    E-Print Network [OSTI]

    Escolano, Francisco

    / CAFÈ TALLAT 0,82 CAFÉ CON LECHE / CAFÈ AMB LLET 0,88 BOMBÓN / BOMBÓ 0,86 LECHE SOLA, VASO 250 ml / LLET SOLA, GOT 250 ml 0,71 INFUSIONES (MANZANILLA, POLEO, TÉ SOLO O CON LIMÓN) INFUSIONS (CAMAMILLA) (mín. 50 gr) / TONYINA (SOLA, AMB MAIONESA O TOMAT 1,71 JAMON SERRANO (mín. 40 gr) / PERNIL SERRÀ (mín

  19. BEBIDAS CALIENTES / BEGUDES CALENTES CAF SOLO / CAF SOL 0,77

    E-Print Network [OSTI]

    Escolano, Francisco

    / CAFÈ TALLAT 0,82 CAFÉ CON LECHE / CAFÈ AMB LLET 0,87 BOMBÓN / BOMBÓ 0,85 LECHE SOLA, VASO 250 ml / LLET SOLA, GOT 250 ml 0,71 INFUSIONES (MANZANILLA, POLEO, TÉ SOLO O CON LIMÓN) INFUSIONS (CAMAMILLA) (mín. 50 gr) / TONYINA (SOLA, AMB MAIONESA O TOMAT 1,70 JAMON SERRANO (mín. 40 gr) / PERNIL SERRÀ (mín

  20. E-Print Network 3.0 - adherencia al uso Sample Search Results

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

    de la figura de l'apartat anterior en fer-la girar al voltant de l... un subconjunt arc-connex de U que te al menys un punt amb comu amb U0, el propi x. Pero, U0 es un...

  1. additional die casting: Topics by E-print Network

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

    into contact... Ambs, L.; Kosanovic, D.; Edberg, C. 5 Prediction of Thermal Fatigue in Tooling for Die-casting Copper via Finite Element Analysis CiteSeer Summary: Abstract. Recent...

  2. aluminium die casting: Topics by E-print Network

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

    into contact... Ambs, L.; Kosanovic, D.; Edberg, C. 8 Prediction of Thermal Fatigue in Tooling for Die-casting Copper via Finite Element Analysis CiteSeer Summary: Abstract. Recent...

  3. Department of Electrical and Computer Engineering,

    E-Print Network [OSTI]

    Hu, Tingshu

    of power supply and power loss. In this paper we present a systematic approach for dealing with all bearings AMB have several appealing ad- vantages over traditional bearings, such as very low power loss

  4. ammonium salts derived: Topics by E-print Network

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

    Utilization Websites Summary: . The efficiency of AmB-based technologies, such as RED for waste heat recovery, critically depends on controlling (AmB) in RED processes for...

  5. 12.3. Fundaci General de la UIB (FuGUIB) La Fundaci General de la Universitat de les Illes Balears (FuGUIB) s una instituci

    E-Print Network [OSTI]

    Oro, Daniel

    Balears (FuGUIB) és una institució privada, amb personalitat jurídica pròpia i sense ànim de lucre. Va ser'ha materialitzat en les accions principals següents: -- Millora en el sistema d'il·luminació de les torres del camp

  6. 13.3. Fundaci General de la UIB (FuGUIB) La Fundaci General de la Universitat de les Illes Balears (FuGUIB) s una instituci

    E-Print Network [OSTI]

    Oro, Daniel

    Balears (FuGUIB) és una institució privada, amb personalitat jurídica pròpia i sense ànim de lucre. Va ser'ha materialitzat en les accions principals següents: -- Anivellament del terra i instal·lació de parquet a la sala

  7. Model Predictive Control for Energy Efficient Buildings

    E-Print Network [OSTI]

    Ma, Yudong

    2012-01-01T23:59:59.000Z

    T mixed T amb d OA ?T supply Cooling Fan Heating 20 Time (models for supply fan (5.6), cooling and heating coils (5.7)Solar radiation u cooling/heating coils supply fan dampers

  8. Capitol 6 Valors Multi Zeta

    E-Print Network [OSTI]

    Xarles, Xavier

    ´o elemental sense passar per la f´ormula amb els nombres de Bernoulli, de la racionalitat de (2n)/(2)n. Comen¸carem

  9. Structuring public REIT-sponsored private capital fund : the case of US industrial and retail REITs

    E-Print Network [OSTI]

    Lee, Cervantes (Cervantes Chih-Chieh), 1975-

    2008-01-01T23:59:59.000Z

    The private capital business for public REITs was started by Kimco Realty, Developer Diversified, AMB and ProLogis during the years 1998-2000, at the time when the public equity was not easily available. Over the past ...

  10. B u t l l e t I n fo r m a t i u U N I V E R S I T A T

    E-Print Network [OSTI]

    Geffner, Hector

    - culats al voltant de figures femenines tan destacables com ara Isabel de Ville- na, Christine de Pizan MERC� SALA, IN MEMORIAM El passat 7 de maig, tota la comunitat universitària de la UPF va rebre amb gran Generalitat de Catalunya per ocupar el càrrec, Mercè Sala va exercir-lo amb gran compromís i dedicació, com

  11. Evaluation of Non-Nuclear Techniques for Well Logging: Final Report

    SciTech Connect (OSTI)

    Bond, Leonard J.; Griffin, Jeffrey W.; Harris, R. V.; Denslow, Kayte M.; Moran, Traci L.

    2011-08-01T23:59:59.000Z

    The focus of this study is the understanding of the technical obstacles that hinder the replacement of and the disadvantages from the loss of extensive interpretation experience based on data accumulated with AmBe. Enhanced acoustic and electromagnetic sensing methods in combination with non-isotope-based well logging techniques have the potential to complement and/or replace existing isotope-based techniques, providing the opportunity to reduce oil industry dependence on isotopic sources such as AmBe.

  12. M`etodes Matem`atics Enginyeria T`ecnica de Telecomunicacions Tema 2: `Algebra lineal Autors: Nat`alia Castellana, Silvia Cuadrado

    E-Print Network [OSTI]

    Castellana, Natàlia

    . Comen¸carem amb les manipulacions elementals de matrius i vectors, el m`etode de Gauss i la resoluci`o comen¸carem carregant aquest paquet (fixeu-vos en alguns del noms de les comandes noves que apareixen al principals amb els que treballarem s´on les matrius i els vectors. Comen¸carem veient com es de- fineixen i

  13. Radiation Source Replacement Workshop

    SciTech Connect (OSTI)

    Griffin, Jeffrey W.; Moran, Traci L.; Bond, Leonard J.

    2010-12-01T23:59:59.000Z

    This report summarizes a Radiation Source Replacement Workshop in Houston Texas on October 27-28, 2010, which provided a forum for industry and researchers to exchange information and to discuss the issues relating to replacement of AmBe, and potentially other isotope sources used in well logging.

  14. PROBLEMES ENERGIES RENOVABLES. INTRODUCCIO Heu de fer servir estimacions raonables.

    E-Print Network [OSTI]

    Batiste, Oriol

    PROBLEMES ENERGIES RENOVABLES. INTRODUCCI´O Heu de fer servir estimacions raonables. PROBLEAM 1`olica ´es la que t´e un creixement m´es important de les renovables. Amb el ritme de creixement actual quan

  15. BIOLOGICAL SCIENCES DIVISION AND THE PRITZKER SCHOOL OF MEDICINE Quarter Course Number Directors Email Office Phone

    E-Print Network [OSTI]

    Sherman, S. Murray

    . James O'Reilly oreilly@uchicago.edu BSLC 426 702-2266 Health Care Disparities: Equity & Advocacy MEDC-7858 Dr. James O'Reilly oreilly@uchicago.edu BSLC 426 702-2266 Health Care Disparities: Equity & Advocacy 9118 834-8632 Dr. Anthony Montag amontag@bsd.uchicago.edu AMB S628 702-9318 Dr. James O'Reilly oreilly

  16. Geometria Diferencial 2 Suplement d'`algebra

    E-Print Network [OSTI]

    Gràcia, Xavier

    Geometria Diferencial 2 Suplement d'`algebra Xavier Gr`acia Departament de Matem`atica Aplicada IV diverses q¨uestions d'`algebra que apareixen dins l'assignatura. M`oduls Quan en els axiomes d concepte d'homomorfisme (o aplicaci´o lineal) entre m`oduls ´es el mateix que amb espais vectorials, i an

  17. 26150 -Fonaments Matemtics de l'Arquitectura Tcnica Crrega docent

    E-Print Network [OSTI]

    Casanellas, Marta

    pla i a l'espai I.1 Vectors I.2 Transformacions lineals I.3 Aplicacions TEMA II Càlcul amb diferents). Applied Linear Algebra. Mexico: Ed. Prentice Hall International Castellet ,M.; Llerena, L. (1991) . Àlgebra lineal i geometria. Bellaterra: Universitat Autònoma de Barcelona. BIBLIOGRAFIA COMPLEMENTÀRIA

  18. l'istituzio alla redazi

    E-Print Network [OSTI]

    Guidoni, Leonardo

    /02/2014 rca nell'amb ell'adattamen Dar es Salaam A ento di Inge ne di racc urbanistici dinanza, tut per l cli a ile, Edile e A oni per l'in ali di Dar he siano in erritorio L'e missione esam l presente av imatico nei Ambientale ntegrazione es Salaam, possesso di equivalenza minatrice. I vviso. 'Ingegneria

  19. A simple, fast, and accurate method of phylogenomic inference.

    E-Print Network [OSTI]

    Wu, Martin; Eisen, Jonathan

    2008-01-01T23:59:59.000Z

    88 cum M y so ye la riu luy lin AT M yc co pla llow sma m nver um yc op pla sm s la uc i D A CC op la sm a w id le SMminan Jake Arkan AMB 1 An pla ru is str str um Ana rlichia

  20. Notcies i esdeveniments Curs d'Estiu: Reptes de la Medicina Reproductiva en el Segle XXI (Publicada 16/06/2014)

    E-Print Network [OSTI]

    Escolano, Francisco

    Notícies i esdeveniments Curs d'Estiu: Reptes de la Medicina Reproductiva en el Segle XXI (Publicada 16/06/2014) La Càtedra de Medicina de la Reproducció juntament amb l'Institut Bernabeu organitzen el curs d'estiu "Reptes de la medicina reproductiva en el segle XXI". El curs, dirigit a estudiants

  1. M`etodes Matem`atics Enginyeria T`ecnica de Telecomunicacions Tema 2: `Algebra lineal Autors: Nat`alia Castellana, Silvia Cuadrado

    E-Print Network [OSTI]

    Castellana, Natàlia

    hem estudiat a les classes de teoria, al mateix temps que repassarem i resoldrem exercicis. Comen¸carem comandes amb les que treballarem es troben a la llibreria linalg , per aix`o comen¸carem carregant aquest treballarem s´on les matrius i els vectors. Comen¸carem veient com es de- fineixen i es realitzen operacions

  2. Characteristics of the Neutron Irradiation Facilities of the PSI Calibration Laboratory

    SciTech Connect (OSTI)

    Hoedlmoser, H.; Schuler, Ch.; Butterweck, G.; Mayer, S. [Paul Scherrer Institut, 5232 Villigen PSI (Switzerland)

    2011-12-13T23:59:59.000Z

    The neutron radiation fields of the Calibration Laboratory at Paul Scherrer Institute (PSI) are traceable to the national standards of the Physikalisch-Technische Bundesanstalt (PTB) in Germany. A Berthold LB6411 neutron dose rate meter for neutron radiation is used as a secondary standard. Recently, a thorough characterization of the neutron irradiation fields of the {sup 241}Am-Be and {sup 252}Cf sources by means of reference measurements and a detailed MCNPX simulation of the irradiation facility has been initiated. In this work, the characteristics of the neutron radiation fields are summarized and presented together with model equations and an uncertainty analysis. MCNPX results are shown for the {sup 241}Am-Be source. A comparison of measured and simulated data shows an excellent agreement. From the simulation, valuable information about the neutron fields like the contribution of scattered neutrons in the fields and the energy spectra could be obtained.

  3. SISTEMES D'ACUMULACIO D'ENERGIA Les energies renovables com la solar o la e`olica tenen un caracter inter-

    E-Print Network [OSTI]

    Batiste, Oriol

    SISTEMES D'ACUMULACI´O D'ENERGIA Les energies renovables com la solar o la e`olica tenen un sistemes d'acumulaci´o d'energia. Un sitema d'acumulaci´o pot ser fonamental per a fer viable la introducci rendibilitat del sistema venent l'energia quan sigui m´es cara (hores punta). Amb un sistema d'acumulaci´o d'energia

  4. BIOLOGICAL SCIENCES DIVISION AND THE PRITZKER SCHOOL OF MEDICINE Quarter Course Number Directors Email Office Phone

    E-Print Network [OSTI]

    Issa, Naoum

    . James O'Reilly oreilly@uchicago.edu BSLC 426 702-2266 Health Care Disparities: Equity & Advocacy MEDC-7858 Dr. James O'Reilly oreilly@uchicago.edu BSLC 426 702-2266 Health Care Disparities: Equity & Advocacy@bsd.uchicago.edu KCBD 9118 834-8632 Dr. Anthony Montag amontag@bsd.uchicago.edu AMB S628 702-9318 Dr. James O'Reilly

  5. EDO's lineals Tema 6 de l'assignatura M`etodes Num`erics de l'Enginyeria Quimica de la

    E-Print Network [OSTI]

    Casanellas, Marta

    `encia lineal entre les derivades de y(x). Podem entendre-la millor amb `algebra lineal. Siguin 83 #12;84 CAPCap´itol 6 EDO's lineals Tema 6 de l'assignatura M`etodes Num`erics de l'Enginyeria Qu´imica de la'autor a http://www.ma1.upc.edu/amoros 6.1 EDO's lineals Definici´o 6.1. Una equaci´o diferencial ordin

  6. UNIVERSITAT POLIT`ECNICA DE CATALUNYA ALGEBRA LINEAL, ENGINYERIA QUIMICA

    E-Print Network [OSTI]

    Casanellas, Marta

    UNIVERSITAT POLIT`ECNICA DE CATALUNYA ALGEBRA LINEAL, ENGINYERIA QU´IMICA 2002­3 Llista 5 propis = 0 (simple) i = n (amb multiplicitat algebraica i geom`etrica n - 1). 1 #12;2 UPC - ENG. QU´IMICA.25 0.1 0.2 0.5 #12;UPC - ENG. QU´IMICA - ALGEBRA LINEAL - 02­03 3 Es t´e aproximadament A5 = 0

  7. UNIVERSITAT POLIT`ECNICA DE CATALUNYA ALGEBRA LINEAL, ENGINYERIA QUIMICA

    E-Print Network [OSTI]

    Casanellas, Marta

    UNIVERSITAT POLIT`ECNICA DE CATALUNYA ALGEBRA LINEAL, ENGINYERIA QU´IMICA 2002­3 Tema 2: Espais #12;2 UPC - ENG. QU´IMICA - ALGEBRA LINEAL - 02­03 38. Calculeu la dimensi´o i un sistema d = At } #12;UPC - ENG. QU´IMICA - ALGEBRA LINEAL - 02­03 3 Formeu una base de l'espai total amb una base del

  8. MOBILITA' INTERNAZIONALE a.a. 2012/2013 SECONDO BANDO

    E-Print Network [OSTI]

    DE SEVILLA ELN, FIS, AER, AUT, ELT, ENG, MEC, MAT, AMB, MTM, GES, TLC 3° L o 1° LM F CERGY01 ECOLE �COLE CENTRALE MARSEILLE MTM, FIS, GES, INF, MEC 2° L F LYON11 �COLE CENTRALE DE LYON MTM, FIS, GES, INF, MEC 2° L F LILLE14 �COLE CENTRALE DE LILLE MTM, FIS, GES, INF, MEC 2° L F NANTES07 �COLE CENTRALE DE

  9. Ttol: MARC PER AL PLA ESTRATGIC DE LA UNIVERSITAT D'ALACANT (HORITZ 2012)

    E-Print Network [OSTI]

    Escolano, Francisco

    Títol: MARC PER AL PLA ESTRAT�GIC DE LA UNIVERSITAT D'ALACANT (HORITZ� 2012) Categoria: Consejo de Gobierno Fecha de aprobación: 28 de febrero de 2007 MARC PER AL PLA ESTRAT�GIC DE LA eficaç, eficient, transparent i amb visió de futur, ha decidit emprendre l´elaboració del Pla Estratègic

  10. L'ELABORACI DEL PLA UNITAT D'INNOVACI -UPF BUSINESS

    E-Print Network [OSTI]

    GUIA PER A L'ELABORACI� DEL PLA D'EMPRESA UNITAT D'INNOVACI� - UPF BUSINESS SHUTTLE La Unitat d'elaboració del vostre pla d'empresa. El document present s'ha realitzat amb el suport de FEDER mitjançant el projecte "UPF Valora" Novembre del 2012 UPF BUSINESS SHUTTLE #12;GUIA PER A L'ELABORACI� DEL PLA D

  11. Butlleti de la Societat Catalana de Matem`atiques Vol. 00, num. 0, 2006. P`ag. 15

    E-Print Network [OSTI]

    Ball, Simeon

    cos finit de q elements amb q = pr , r 1 i p primer. Aix´i doncs, el pla af´i sobre Fq, que denotarem punt. El pla af´i es pot estendre al pla projectiu PG(2, q) afegint un punt per a cada fam´ilia de l(2, q) es poden identificar #12;2 Simeon Ball Figura 1: El pla de Fano. Figura 2: El pla af´i i el

  12. The prototype of a detector for monitoring the cosmic radiation neutron flux on ground

    SciTech Connect (OSTI)

    Lelis Goncalez, Odair; Federico, Claudio Antonio; Mendes Prado, Adriane Cristina; Galhardo Vaz, Rafael; Tizziani Pazzianotto, Mauricio [Instituto de Estudos Avancados - IEAv/DCTA - Sao Jose dos Campos, SP (Brazil); Semmler, Renato [Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP - Sao Paulo, SP (Brazil)

    2013-05-06T23:59:59.000Z

    This work presents a comparison between the results of experimental tests and Monte Carlo simulations of the efficiency of a detector prototype for on-ground monitoring the cosmic radiation neutron flux. The experimental tests were made using one conventional {sup 241}Am-Be neutron source in several incidence angles and the results were compared to that ones obtained with a Monte Carlo simulation made with MCNPX Code.

  13. Aprovaci de les propostes de modificacions de ttols existents i de nous ttols de grau i mster universitari per al curs 2015-2016

    E-Print Network [OSTI]

    Yannuzzi Sanchez, Marcelo

    ) 4. Nous màsters que es proposa aprovar Màsters amb atribucions · Màster Universitari en Arquitectura de la proposta inicial. · Màster Barcelona-Arquitectura en Estudis Avançats d'Arquitectura (nom pendent de confirmar) (ETSAB), que fusiona els màsters següents MU d'Arquitectura, Energia i Medi Ambient

  14. Ple 22 de juliol de 2014 6.1.1. INFORMACI SOBRE L'ANLISI I LA VALORACI DE LES NOVES

    E-Print Network [OSTI]

    Yannuzzi Sanchez, Marcelo

    proposa aprovar Màsters amb atribucions · Màster Universitari en Arquitectura (itineraris ETSAB i ETSAV. · Màster Barcelona-Arquitectura en Estudis Avançats d'Arquitectura (nom pendent de confirmar) (ETSAB), que fusiona els màsters següents MU d'Arquitectura, Energia i Medi Ambient, MU en Gestió i Valoració Urbana

  15. Evaluation of Non-Nuclear Techniques for Well Logging: Technology Evaluation

    SciTech Connect (OSTI)

    Bond, Leonard J.; Denslow, Kayte M.; Griffin, Jeffrey W.; Dale, Gregory E.; Harris, Robert V.; Moran, Traci L.; Sheen, David M.; Schenkel, Thomas

    2010-11-01T23:59:59.000Z

    This report presents an initial review of the state-of-the-art nuclear and non-nuclear well logging methods and seeks to understand the technical and economic issues if AmBe, and potentially other isotope sources, are reduced or even eliminated in the oil-field services industry. Prior to considering alternative logging technologies, there is a definite need to open up discussions with industry regarding the feasibility and acceptability of source replacement. Industry views appear to range from those who see AmBe as vital and irreplaceable to those who believe that, with research and investment, it may be possible to transition to electronic neutron sources and employ combinations of non-nuclear technologies to acquire the desired petro-physical parameters. In one sense, the simple answer to the question as to whether petro-physical parameters can be sensed with technologies other than AmBe is probably "Yes". The challenges come when attention turns to record interpretation. The many decades of existing records form a very valuable proprietary resource, and the interpretation of subtle features contained in these records are of significant value to the oil-gas exploration community to correctly characterize a well. The demonstration of equivalence and correspondence/correlation between established and any new sensing modality, and correlations with historic records is critical to ensuring accurate data interpretation. Establishing the technical basis for such a demonstration represents a significant effort.

  16. Tailoring the Neutron Spectrum from a 14-MeV Neutron Generator to Approximate a Spontaneous-Fission Spectrum

    SciTech Connect (OSTI)

    James Simpson; David Chichester

    2011-06-01T23:59:59.000Z

    Many applications of neutrons for non-invasive measurements began with isotopic sources such as AmBe or Cf-252. Political factors have rendered AmBe undesirable in the United States and other countries, and the supply of Cf-252 is limited and significantly increasing in price every few years. Compact and low-power deuterium-tritium (DT) electronic neutron generators can often provide sufficient flux, but the 14-MeV neutron spectrum is much more energetic (harder) than an isotopic neutron source. A series of MCNP simulations were run to examine the extent to which the 14-MeV DT neutron spectrum could be softened through the use of high-Z and low-Z materials. Some potential concepts of operation require a portable neutron generator system, so the additional weight of extra materials is also a trade-off parameter. Using a reference distance of 30 cm from the source, the average neutron energy can be lowered to be less than that of either AmBe or Cf-252, while obtaining an increase in flux at the reference distance compared to a bare neutron generator. This paper discusses the types and amounts of materials used, the resulting neutron spectra, neutron flux levels, and associated photon production.

  17. Effects of dietary phosphorus and high ambient temperature on egg shell quality in hens

    E-Print Network [OSTI]

    Bailey, Christopher Anthony

    1979-01-01T23:59:59.000Z

    EFFECTS OF DIETARY PHOSPHORUS AND HIG11 AMB1ENT TEMPERATURE ON EGG SHELL QUALITY IN HENS A Thesis by CHRISTOPHER ANTHONY BAI1EEY Submitted to the Graduate College of Texas A@I University in Partial fuI. fillme ~t of the requirement... for the degree of F1ASTER OF SCIENCE May 19 79 Major Subject: Poultry Science EFFECTS OF DIETARY PHOSPHORUS AND HIGH AMBIENT TEMPERATURE ON EGG SHELL QUALITY IN HENS A Thesis by CHRISTOPHER ANTHONY BAILEY Approved as to style and content by; ( hairm...

  18. Maayamma Nannu Ragam: Nata Kuranji {28th Mela Janyam}

    E-Print Network [OSTI]

    Kalyanaraman, Shivkumar

    AnandA AnandA ambA (svara) mA ma ma ga sa *ni *dha *ni sa ri ga mA ma ma ga ma ni dha mA ma ma , ni dha ni sA* ri* ga* mA* ma* ga* ma* ri* sA* ni sa* sA* ni dha ma ma , ga sa *nI *dha *ni sa *dha *dha *pa *dha/06/syama-sastry-kriti-mayamma- nannu-raga.html) O My ("mA") Mother ("ammA") ("mAyammA")! O Mother ("amm

  19. Nuclear radiation detectors based on a matrix of ion-implanted p-i-n diodes on undoped GaAs epilayers

    SciTech Connect (OSTI)

    Baryshnikov, F. M.; Britvich, G. I.; Chernykh, A. V.; Chernykh, S. V.; Chubenko, A. P.; Didenko, S. I.; Koltsov, G. I. [National University of Science and Technology 'MISIS', Leninskiy prospect 4, 119049 Moscow (Russian Federation); Institute for High Energy Physics, Polshhad nauki 1, 142281 Protvino (Russian Federation); National University of Science and Technology 'MISIS', Leninskiy prospect 4, 119049 Moscow (Russian Federation); P.N. Lebedev Physical Institute of the RAS, Leninskiy prospect 53, 119991 Moscow (Russian Federation); National University of Science and Technology 'MISIS', Leninskiy prospect 4, 119049 Moscow (Russian Federation)

    2012-11-06T23:59:59.000Z

    Samples of nuclear detectors which represent matrices of p-i-n diodes were fabricated based on undoped gallium arsenide epitaxial layers by ion implantation technology. The detectors have a size of the active area of 0.4 Multiplication-Sign 0.4 and 0.9 Multiplication-Sign 0.9 cm{sup 2}. Electrical characteristics of fabricated detectors and results of measurements of fast neutrons spectra of {sup 241}Am-Be source by the recoil protons method are discussed.

  20. Amber_HEP-NERSC.pptx

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OFFuelsPropaneSecurity Administration Amb. LintonDOE

  1. Ambica Koushik Pegallapati | Argonne National Laboratory

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OFFuelsPropaneSecurity Administration Amb.

  2. Ambipolar

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OFFuelsPropaneSecurity Administration Amb.Ambipolar

  3. Amendment 4

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OFFuelsPropaneSecurity Administration Amb.Ambipolar4

  4. Amendment 5

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OFFuelsPropaneSecurity Administration Amb.Ambipolar45

  5. Amendment 6

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OFFuelsPropaneSecurity Administration Amb.Ambipolar456

  6. Amendment 7

    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:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmospheric Optical Depth (AOD)ProductssondeadjustsondeadjustAbout theOFFICE OFFuelsPropaneSecurity Administration Amb.Ambipolar4567

  7. Disturbance Rejection Control of an Electromagnetic Bearing Spindle

    SciTech Connect (OSTI)

    PETTEYS,REBECCA; PARKER,GORDON

    2000-08-31T23:59:59.000Z

    The force exerted on the rotor by an active magnetic bearing (AMB) is determined by the current flow in the magnet coils. This force can be controlled very precisely, making magnetic bearings a potential benefit for grinding, where cutting forces act as external disturbances on the shaft, resulting in degraded part finish. It is possible to achieve precise shaft positioning, reduce vibration of the shaft caused by external disturbances, and even damp out resonant modes. Adaptive control is an appealing approach for these systems because the controller can tune itself to account for an unknown periodic disturbance, such as cutting or grinding forces, injected into the system. In this paper the authors show how one adaptive control algorithm can be applied to an AMB system with a periodic disturbance applied to the rotor. An adaptive algorithm was developed and implemented in both simulation and hardware, yielding significant reductions in rotor displacement in the presence of an external excitation. Ultimately, this type of algorithm could be applied to a magnetic bearing grinder to reduce unwanted motion of the spindle which leads to poor part finish and chatter.

  8. Metallurgical Laboratory Hazardous Waste Management Facility groundwater monitoring report. First quarter 1995

    SciTech Connect (OSTI)

    NONE

    1995-06-01T23:59:59.000Z

    During first quarter 1995, samples from AMB groundwater monitoring wells at the Metallurgical Laboratory Hazardous Waste Management Facility (Met Lab HWMF) were analyzed for selected heavy metals, field measurements, radionuclides, volatile organic compounds, and other constituents. Six parameters exceeded standards during the quarter. As in previous quarters, tetrachloroethylene and trichloroethylene exceeded final Primary Drinking Water Standards (PDWS). Total organic halogens exceeded its Savannah River Site (SRS) Flag 2 criterion during first quarter 1995 as in fourth quarter 1994. Aluminum, iron, and manganese, which were not analyzed for during fourth quarter 1994, exceeded the Flag 2 criteria in at least two wells each during first quarter 1995. Groundwater flow direction and rate in the M-Area Aquifer Zone were similar to previous quarters. Conditions affecting the determination of groundwater flow directions and rates in the Upper Lost Lake Aquifer Zone, Lower Lost Lake Aquifer Zone, and the Middle Sand Aquifer Zone of the Crouch Branch Confining Unit were also similar to previous quarters.

  9. Preliminary study of neutron absorption by concrete with boron carbide addition

    SciTech Connect (OSTI)

    Abdullah, Yusof, E-mail: yusofabd@nuclearmalaysia.gov.my; Yusof, Mohd Reusmaazran; Zali, Nurazila Mat; Ahmad, Megat Harun Al Rashid Megat; Yazid, Hafizal [Malaysian Nuclear Agency, Bangi, 43000 Kajang, Selangor (Malaysia); Ariffin, Fatin Nabilah Tajul; Ahmad, Sahrim [School of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor (Malaysia); Hamid, Roszilah [Department of Civil and Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor (Malaysia); Mohamed, Abdul Aziz [College of Engineering, Universiti Tenaga National, Jalan Ikram-Uniten, 43000 Kajang, Selangor (Malaysia)

    2014-02-12T23:59:59.000Z

    Concrete has become a conventional material in construction of nuclear reactor due to its properties like safety and low cost. Boron carbide was added as additives in the concrete construction as it has a good neutron absorption property. The sample preparation for concrete was produced with different weight percent of boron carbide powder content. The neutron absorption rate of these samples was determined by using a fast neutron source of Americium-241/Be (Am-Be 241) and detection with a portable backscattering neutron detector. Concrete with 20 wt % of boron carbide shows the lowest count of neutron transmitted and this indicates the most neutrons have been absorbed by the concrete. Higher boron carbide content may affect the concrete strength and other properties.

  10. Radiation Hardness Tests of SiPMs for the JLab Hall D Barrel Calorimeter

    SciTech Connect (OSTI)

    Yi Qiang, Carl Zorn, Fernando Barbosa, Elton Smith

    2013-01-01T23:59:59.000Z

    We report on the measurement of the neutron radiation hardness of silicon photomultipliers (SiPMs) manufactured by Hamamatsu Corporation in Japan and SensL in Ireland. Samples from both companies were irradiated by neutrons created by a 1 GeV electron beam hitting a thin lead target at Jefferson Lab Hall A. More tests regarding the temperature dependence of the neutron radiation damage and self-annealing were performed on Hamamatsu SiPMs using a calibrated Am–Be neutron source from the Jefferson Lab Radiation Control group. As the result of irradiation both dark current and dark rate increase linearly as a function of the 1 MeV equivalent neutron fluence and a temperature dependent self-annealing effect is observed

  11. Neutron Interactions as Seen by A Segmented Germanium Detector

    E-Print Network [OSTI]

    I. Abt; A. Caldwell; K. Kroeninger; J. Liu; X. Liu; B. Majorovits

    2007-11-14T23:59:59.000Z

    The GERmanium Detector Array, GERDA, is designed for the search for ``neutrinoless double beta decay'' (0-nu-2-beta) with germanium detectors enriched in Ge76. An 18-fold segmented prototype detector for GERDA Phase II was exposed to an AmBe neutron source to improve the understanding of neutron induced backgrounds. Neutron interactions with the germanium isotopes themselves and in the surrounding materials were studied. Segment information is used to identify neutron induced peaks in the recorded energy spectra. The Geant4 based simulation package MaGe is used to simulate the experiment. Though many photon peaks from germanium isotopes excited by neutrons are correctly described by Geant4, some physics processes were identified as being incorrectly treated or even missing.

  12. Shelling in low dimensional manifolds

    E-Print Network [OSTI]

    Murray, William Owen

    1974-01-01T23:59:59.000Z

    topological n-cell. Note that each n-manifold is an n-manifold with boundary. The set of points of M which do not have a ~ 'Ebb hdh fbi g f h~bd fM. d fdby n Bd(M). The interior of M is denoted by Int(M) and defined by Int(M) = M ? Bd(M) . AMb-'fld. d f1... the style of the Proceedings of the American Mathematical Society. M and h n Bd(M) is an (n ? 1)-cell, then h is said to be free in M. Suppose S is a subset of M and T is a cellular decomposition of S. S can be shelled from M relative...

  13. Novel, Integrated Reactor / Power Conversion System (LMR-AMTEC)

    SciTech Connect (OSTI)

    Pablo Rubiolo, Principal Investigator

    2003-03-21T23:59:59.000Z

    The main features of this project were the development of a long life (up to 10 years) Liquid Metal Reactor (LMR) and a static conversion subsystem comprising an Alkali Metal Thermal-to-Electric (AMTEC) topping cycle and a ThermoElectric (TE) Bottom cycle. Various coupling options of the LMR with the energy conversion subsystem were explored and, base in the performances found in this analysis, an Indirect Coupling (IC) between the LMR and the AMTEC/TE converters with Alkali Metal Boilers (AMB) was chosen as the reference design. The performance model of the fully integrated sodium-and potassium-AMTEC/TE converters shows that a combined conversion efficiency in excess of 30% could be achieved by the plant. (B204)

  14. Digital discrimination of neutrons and gamma-rays in organic scintillation detectors using moment analysis

    SciTech Connect (OSTI)

    Xie Xufei; Zhang Xing; Yuan Xi; Chen Jinxiang; Li Xiangqing; Zhang Guohui; Fan Tieshuan [School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing (China); Yuan Guoliang; Yang Jinwei; Yang Qingwei [Southwestern Institute of Physics, Chengdu (China)

    2012-09-15T23:59:59.000Z

    Digital discrimination of neutron and gamma-ray events in an organic scintillator has been investigated by moment analysis. Signals induced by an americium-beryllium (Am/Be) isotropic neutron source in a stilbene crystal detector have been sampled with a flash analogue-to-digital converter (ADC) of 1 GSamples/s sampling rate and 10-bit vertical resolution. Neutrons and gamma-rays have been successfully discriminated with a threshold corresponding to gamma-ray energy about 217 keV. Moment analysis has also been verified against the results assessed by a time-of-flight (TOF) measurement. It is shown that the classification of neutrons and gamma-rays afforded by moment analysis is consistent with that achieved by digital TOF measurement. This method has been applied to analyze the data acquired from the stilbene crystal detector in mixed radiation field of the HL-2A tokamak deuterium plasma discharges and the results are described.

  15. Responsive copolymers for enhanced petroleum recovery. Quarterly technical progress report, September 22, 1993--December 22, 1993

    SciTech Connect (OSTI)

    McCormick, C.; Hester, R.

    1993-12-31T23:59:59.000Z

    Synthetic efforts have focused on the development of ionically modified polymers based on monomers which contain an acrylamido functionality. The monomers may possess either cationic or anionic functionality which, depending on the pH of the polymer solution, may either be ionically charged or neutral. Thus, by adjusting the pH, the degree of ionization of the polymer may be controlled which will in turn influence the rheological behavior. Previous research in our laboratories has revealed that this behavior allows the selective synthesis of polymers operative over a wide range of conditions. This section describes the synthesis and solution behavior of cationic polyelectrolytes based on copolymers of acrylamide (AM) and 2-acrylamido-2-methylpropanetrimethylammonium chloride (AMPTAC), the ATAM series, as well as ampholytic terpolymers of acrylamide (AM), sodium 3-acrylamido-3-methylbutanoate (NaAMB), and 2-acrylamido-2-methylpropanetrimethylammonium chloride (AMPTAC), the ATABAM series. Monomers used in the ATAM and ATABAM series are shown.

  16. Metallurgical Laboratory Hazardous Waste Management Facility groundwater monitoring report. Second quarter 1995

    SciTech Connect (OSTI)

    Chase, J.A.

    1995-09-01T23:59:59.000Z

    During second quarter 1995, samples from seven new AMB groundwater monitoring wells at the Metallurgical Laboratory Hazardous Waste Management Facility (Met Lab HWMF) were analyzed for a comprehensive list of constituents. Two parameters exceeded standards during the quarter. Lead and nickel appear to exceed final Primary Drinking Water Standards (PDWS) in AMB-18A. These data were suspect and a rerun of the samples showed levels below flagging criteria. This data will be monitored in 3Q95. Aluminum, iron, manganese, boron, silver and total organic halogens exceeded Flag 2 criteria in at least one well each during second quarter 1995. This data, as well, will be confirmed by 3Q95 testing. Groundwater flow directions in the M-Area Aquifer Zone were similar to previous quarters; the flow rate estimate, however, differs because of an error noted in the scales of measurements used for previous estimates. The estimate was 470 ft/year during second quarter 1995. Reliable estimates of flow directions and rates in the Upper Lost Lake Aquifer Zone could not be determined in previous quarters because data were insufficient. The first estimate from second quarter 1995 shows a 530 ft/year rate. Reliable estimates of flow directions and rates in the Lower Lost Lake Aquifer Zone and in the Middle Sand Aquifer Zone of the CBCU could not be calculated because of the low horizontal gradient and the near-linear distribution of the monitoring wells. During second quarter 1994, SRS received South Carolina Department of Health and Environmental Control approval for constructing five point-of-compliance wells and two plume definition wells near the Met Lab HWMF. This project began in July 1994 and was completed in March of this year. Analytical data from these wells are presented in this report for the first time.

  17. Characterization of the neutron irradiation system for use in the Low-Dose-Rate Irradiation Facility at Sandia National Laboratories.

    SciTech Connect (OSTI)

    Franco, Manuel,

    2014-08-01T23:59:59.000Z

    The objective of this work was to characterize the neutron irradiation system consisting of americium-241 beryllium (241AmBe) neutron sources placed in a polyethylene shielding for use at Sandia National Laboratories (SNL) Low Dose Rate Irradiation Facility (LDRIF). With a total activity of 0.3 TBq (9 Ci), the source consisted of three recycled 241AmBe sources of different activities that had been combined into a single source. The source in its polyethylene shielding will be used in neutron irradiation testing of components. The characterization of the source-shielding system was necessary to evaluate the radiation environment for future experiments. Characterization of the source was also necessary because the documentation for the three component sources and their relative alignment within the Special Form Capsule (SFC) was inadequate. The system consisting of the source and shielding was modeled using Monte Carlo N-Particle transport code (MCNP). The model was validated by benchmarking it against measurements using multiple techniques. To characterize the radiation fields over the full spatial geometry of the irradiation system, it was necessary to use a number of instruments of varying sensitivities. First, the computed photon radiography assisted in determining orientation of the component sources. With the capsule properly oriented inside the shielding, the neutron spectra were measured using a variety of techniques. A N-probe Microspec and a neutron Bubble Dosimeter Spectrometer (BDS) set were used to characterize the neutron spectra/field in several locations. In the third technique, neutron foil activation was used to ascertain the neutron spectra. A high purity germanium (HPGe) detector was used to characterize the photon spectrum. The experimentally measured spectra and the MCNP results compared well. Once the MCNP model was validated to an adequate level of confidence, parametric analyses was performed on the model to optimize for potential experimental configurations and neutron spectra for component irradiation. The final product of this work is a MCNP model validated by measurements, an overall understanding of neutron irradiation system including photon/neutron transport and effective dose rates throughout the system, and possible experimental configurations for future irradiation of components.

  18. Student Progress Report: Summer 2012

    SciTech Connect (OSTI)

    Tucker, Lucas P [Los Alamos National Laboratory

    2012-08-06T23:59:59.000Z

    The Los Alamos SOURCES 4C code has been benchmarked for alpha particle beam problems and common neutron source materials (e.g. those containing plutonium or beryllium), but little benchmarking has been performed for more exotic isotopic neutron sources or uranium mixtures. This work extends SOURCES 4C benchmarking effort. Experimental data was found in the literature for several isotopic neutron sources, namely Am/Be, Am/F, Am/B, Cm/Be, {sup 238}Pu/{sup 13}C, {sup 252}Cf, and Am/Li. SOURCES 4C simulations were run for each of these materials and the output was used to develop a source term for use in MCNP, which allowed other physical effects such as down scattering and multiplication to be accounted for. Neutron emission rate and energy spectra results were compared for these sources, generally yielding order-of-magnitude agreement for the neutron emission rate and qualitative agreement for the shape of the neutron energy spectra. An exception was the neutron energy spectrum calculated for {sup 238}Pu/{sup 13}C whose primary peak was calculated to be 1 MeV higher than was measured. The accuracy of SOURCES is highly dependent on an accurate material definition. This discrepancy is likely due to inhomogeneity of the source materials, which cannot be simulated by SOURCES or MCNP, and chemical impurities not reported by the experimentalist. The results of the Am/Li calculation demonstrate that even small impurities are capable of dramatically changing the results. The neutron emission rates of numerous uranium compounds were also calculated with SOURCES and benchmarked with experimentally determined values found in the literature. The calculated results were similar to the experimental results with less than 10% error for the following compounds: uranyl fluoride, uranyl nitrate, UO{sub 3}, UO{sub 2}F{sub 2}, UF{sub 4}, UF{sub 6}, and U-metal of less than 90% enrichment. This work demonstrates the robustness of SOURCES as a tool for calculating neutron emission rates and energy spectra.

  19. NSDann2BS, a neutron spectrum unfolding code based on neural networks technology and two bonner spheres

    SciTech Connect (OSTI)

    Ortiz-Rodriguez, J. M.; Reyes Alfaro, A.; Reyes Haro, A.; Solis Sanches, L. O.; Miranda, R. Castaneda; Cervantes Viramontes, J. M. [Universidad Autonoma de Zacatecas, Unidad Academica de Ingenieria Electrica. Av. Ramon Lopez Velarde 801. Col. Centro Zacatecas, Zac (Mexico); Vega-Carrillo, H. R. [Universidad Autonoma de Zacatecas, Unidad Academica de Ingenieria Electrica. Av. Ramon Lopez Velarde 801. Col. Centro Zacatecas, Zac., Mexico. and Unidad Academica de Estudios Nucleares. C. Cip (Mexico)

    2013-07-03T23:59:59.000Z

    In this work a neutron spectrum unfolding code, based on artificial intelligence technology is presented. The code called ''Neutron Spectrometry and Dosimetry with Artificial Neural Networks and two Bonner spheres'', (NSDann2BS), was designed in a graphical user interface under the LabVIEW programming environment. The main features of this code are to use an embedded artificial neural network architecture optimized with the ''Robust design of artificial neural networks methodology'' and to use two Bonner spheres as the only piece of information. In order to build the code here presented, once the net topology was optimized and properly trained, knowledge stored at synaptic weights was extracted and using a graphical framework build on the LabVIEW programming environment, the NSDann2BS code was designed. This code is friendly, intuitive and easy to use for the end user. The code is freely available upon request to authors. To demonstrate the use of the neural net embedded in the NSDann2BS code, the rate counts of {sup 252}Cf, {sup 241}AmBe and {sup 239}PuBe neutron sources measured with a Bonner spheres system.

  20. Testing for characterization of the materials from radiological point of view

    SciTech Connect (OSTI)

    Bercea, Sorin; Iliescu, Elena; Dudu, Dorin; Iancso, Georgeta [National Institute of R and D for Physics and Nuclear Engineering-Horia Hulubei , Reactorului 30 St, P.O.BOX MG-6,Magurele, cod 077125 (Romania)

    2013-12-16T23:59:59.000Z

    The nuclear techniques and materials are now used in a large number of applications, both in medicine and industry. Due to this fact, new materials are needed in order to assure the radiological protection of the personnel involved in these activities. But, finally, all these materials have to be tested for some specific parameters, in order to prove that they are adequate for the purposed for which they were created. One of the important parameters of the materials used for the radiological protection is the attenuation coefficient. The attenuation coefficient of the ionizing radiation composed by particles without electrical charge (X,?-ray and neutron) is the most important parameter for the materials used for the shielding of these ionizing radiation. This paper deals with the experimental methods developed for the determination of the attenuation of fast and thermal neutrons. These experimental methods, involved the use of Am-Be source and U-120 Cyclotron of IFIN-HH. For the tests which were done at the U-120 Cyclotron, a number of experiments had to be performed, in order to establish the irradiation geometry and the dose equivalent rates in front of and behind the material samples. The experimental results obtained for samples of several materials, confirmed the methods as adequate for the aim of the test.

  1. Responsive copolymers for enhanced petroleum recovery. Annual report

    SciTech Connect (OSTI)

    McCormick, C.; Hester, R.

    1994-08-01T23:59:59.000Z

    A coordinated research program involving synthesis, characterization, and rheology has been undertaken to develop advanced polymer system which should be significantly more efficient than polymers presently used for mobility control and conformance. Unlike the relatively inefficient, traditional EOR polymers, these advanced polymer systems possess microstructural features responsive to temperature, electrolyte concentration, and shear conditions. Contents of this report include the following chapters. (1) First annual report responsive copolymers for enhanced oil recovery. (2) Copolymers of acrylamide and sodium 3-acrylamido-3-methylbutanoate. (3) Terpolymers of NaAMB, Am, and n-decylacrylamide. (4) Synthesis and characterization of electrolyte responsive terpolymers of acrylamide, N-(4-butyl)phenylacrylamide, and sodium acrylate, sodium-2-acrylamido-2-methylpropanesulphonate or sodium-3-acrylamido-3-methylbutanoate. (5) Synthesis and solution properties of associative acrylamido copolymers with pyrensulfonamide fluorescence labels. (6) Photophysical studies of the solution behavior of associative pyrenesulfonamide-labeled polyacrylamides. (7) Ampholytic copolymers of sodium 2-(acrylamido)-2-methylpropanesulfonate with [2-(acrylamido)-2-methypropyl]trimethylammonium chloride. (8) Ampholytic terpolymers of acrylamide with sodium 2-acrylamido-2-methylpropanesulphoante and 2-acrylamido-2-methylpropanetrimethyl-ammonium chloride and (9) Polymer solution extensional behavior in porous media.

  2. SHIELDING ANALYSIS FOR PORTABLE GAUGING COMBINATION SOURCES

    SciTech Connect (OSTI)

    J. TOMPKINS; L. LEONARD; ET AL

    2000-08-01T23:59:59.000Z

    Radioisotopic decay has been used as a source of photons and neutrons for industrial gauging operations since the late 1950s. Early portable moisture/density gauging equipment used Americium (Am)-241/Beryllium (Be)/Cesium (Cs)-137 combination sources to supply the required nuclear energy for gauging. Combination sources typically contained 0.040 Ci of Am-241 and 0.010 Ci of CS-137 in the same source capsule. Most of these sources were manufactured approximately 30 years ago. Collection, transportation, and storage of these sources once removed from their original device represent a shielding problem with distinct gamma and neutron components. The Off-Site Source Recovery (OSR) Project is planning to use a multi-function drum (MFD) for the collection, shipping, and storage of AmBe sources, as well as the eventual waste package for disposal. The MFD is an approved TRU waste container design for DOE TRU waste known as the 12 inch Pipe Component Overpack. As the name indicates, this drum is based on a 12 inch ID stainless steel weldment approximately 25 inch in internal length. The existing drum design allows for addition of shielding within the pipe component up to the 110 kg maximum pay load weight. The 12 inch pipe component is packaged inside a 55-gallon drum, with the balance of the interior space filled with fiberboard dunnage. This packaging geometry is similar to the design of a DOT 6M, Type B shipping container.

  3. A First Comparison of the responses of a He4-based fast-neutron detector and a NE-213 liquid-scintillator reference detector

    E-Print Network [OSTI]

    Jebali, R; Annand, J R M; Chandra, R; Davatz, G; Fissum, K G; Friederich, H; Gendotti, U; Hall-Wilton, R; Håkansson, E; Kanaki, K; Lundin, M; Murer, D; Nilsson, B; Rosborg, A; Svensson, H

    2015-01-01T23:59:59.000Z

    A first comparison has been made between the pulse-shape discrimination characteristics of a novel He4-based pressurized scintillation detector and a NE-213 liquid-scintillator reference detector using an Am/Be mixed-field neutron and gamma-ray source and a high-resolution scintillation-pulse digitizer. In particular, the capabilities of the two fast neutron detectors to discriminate between neutrons and gamma-rays were investigated. The NE-213 liquid-scintillator reference cell produced a wide range of scintillation-light yields in response to the gamma-ray field of the source. In stark contrast, the He4-based detector registered a maximum scintillation-light yield of 750 keVee to the same gamma-ray field. Pulse-shape discrimination for particles with scintillation-light yields of more than 750 keVee was excellent in the case of the He4-based detector, and above 750 keVee its signal was unambiguously neutron.

  4. A First Comparison of the responses of a He4-based fast-neutron detector and a NE-213 liquid-scintillator reference detector

    E-Print Network [OSTI]

    R. Jebali; J. Scherzinger; J. R. M. Annand; R. Chandra; G. Davatz; K. G. Fissum; H. Friederich; U. Gendotti; R. Hall-Wilton; E. Håkansson; K. Kanaki; M. Lundin; D. Murer; B. Nilsson; A. Rosborg; H. Svensson

    2015-02-13T23:59:59.000Z

    A first comparison has been made between the pulse-shape discrimination characteristics of a novel He4-based pressurized scintillation detector and a NE-213 liquid-scintillator reference detector using an Am/Be mixed-field neutron and gamma-ray source and a high-resolution scintillation-pulse digitizer. In particular, the capabilities of the two fast neutron detectors to discriminate between neutrons and gamma-rays were investigated. The NE-213 liquid-scintillator reference cell produced a wide range of scintillation-light yields in response to the gamma-ray field of the source. In stark contrast, the He4-based detector registered a maximum scintillation-light yield of 750 keVee to the same gamma-ray field. Pulse-shape discrimination for particles with scintillation-light yields of more than 750 keVee was excellent in the case of the He4-based detector, and above 750 keVee its signal was unambiguously neutron.

  5. Responsive copolymers for enhanced petroleum recovery. Second annual report

    SciTech Connect (OSTI)

    McCormick, C.; Hester, R.

    1995-05-01T23:59:59.000Z

    The authors describe second year efforts in synthesis, characterization, and rheology to develop polymers with significantly improved efficiency in mobility control and conformance. These advanced polymer systems would maintain high viscosities or behave as virtual gels under low shear conditions and at elevated electrolyte concentrations. At high fluid shear rates, associates would deaggregate yielding low viscosity solutions, reducing problems of shear degradation or face plugging during injection. Polymeric surfactants were also developed with potential for use in higher salt, higher temperature reservoirs for mobilization of entrapped oil. Chapters include: Ampholytic terpolymers of acrylamide with sodium 3-acrylamido-3-methylbutanoate and 2-acrylamido-2-methylpropanetrimethylammonium chloride; Hydrophilic sulfobetaine copolymers of acrylamide and 3-(2-acrylamido-methylpropane-dimethylammonio)-1-propanesulfonate; Copolymerization of maleic anhydride and N-vinylformamide; Reactivity ratio of N-vinylformamide with acrylamide, sodium acrylate, and n-butyl acrylate; Effect of the distribution of the hydrophobic cationic monomer dimethyldodecyl(2-acrylamidoethyl)ammonium bromide on the solution behavior of associating acrylamide copolymers; Effect of surfactants on the solution properties of amphipathic copolymers of acrylamide and N,N-dimethyl-N-dodecyl-N-(2-acrylamidoethyl)ammonium bromide; Associative interactions and photophysical behavior of amphiphilic terpolymers prepared by modification of maleic anhydride/ethyl vinyl ether copolymers; Copolymer compositions of high-molecular-weight functional acrylamido water-soluble polymers using direct-polarization magic-angle spinning {sup 13}C NMR; Use of factorial experimental design in static and dynamic light scattering characterization of water soluble polymers; and Porous medium elongational rheometer studies of NaAMB/AM copolymer solutions.

  6. High Purity Americium-241 for Fuel Cycle R&D Program

    SciTech Connect (OSTI)

    Dr. Paul A. Lessing

    2011-07-01T23:59:59.000Z

    Previously the U.S. Department of Energy released Am-241 for various applications such as smoke detectors and Am-Be neutron sources for oil wells. At this date there is a shortage of usable, higher purity Am-241 in metal and oxide form available in the United States. Recently, the limited source of Am-241 has been from Russia with production being contracted to existing customers. The shortage has resulted in the price per gram rising dramatically over the last few years. DOE-NE currently has need for high purity Am-241 metal and oxide to fabricate fuel pellets for reactor testing in the Fuel Cycle R&D program. All the available high purity americium has been gathered from within the DOE system of laboratories. However, this is only a fraction of the projected needs of FCRD over the next 10 years. Therefore, FCR&D has proposed extraction and purification concepts to extract Am-241 from a mixed AmO2-PuO2 feedstock stored at the Savannah River Site. The most simple extraction system is based upon high temperature reduction using lanthanum metal with concurrent evaporation and condensation to produce high purity Am metal. Metallic americium has over a four order of magnitude higher vapor pressure than plutonium. Results from small-scale reduction experiments are presented. These results confirm thermodynamic predictions that at 1000 deg C metallic lanthanum reduces both PuO2 and AmO2. Faster kinetics are expected for temperatures up to about 1500 deg C.

  7. First limits on WIMP nuclear recoil signals in ZEPLIN-II: a two phase xenon detector for dark matter detection

    E-Print Network [OSTI]

    G. J. Alner; H. M. Araujo; A. Bewick; C. Bungau; B. Camanzi; M. J. Carson; R. J. Cashmore; H. Chagani; V. Chepel; D. Cline; D. Davidge; J. C. Davies; E. Daw; J. Dawson; T. Durkin; B. Edwards; T. Gamble; J. Gao; C. Ghag; A. S. Howard; W. G. Jones; M. Joshi; E. V. Korolkova; V. A. Kudryavtsev; T. Lawson; V. N. Lebedenko; J. D. Lewin; P. Lightfoot; A. Lindote; I. Liubarsky; M. I. Lopes; R. Luscher; P. Majewski; K Mavrokoridis; J. E. McMillan; B. Morgan; D. Muna; A. St. J. Murphy; F. Neves; G. G. Nicklin; W. Ooi; S. M. Paling; J. Pinto da Cunha; S. J. S. Plank; R. M. Preece; J. J. Quenby; M. Robinson; F. Sergiampietri; C. Silva; V. N. Solovov; N. J. T. Smith; P. F. Smith; N. J. C. Spooner; T. J. Sumner; C. Thorne; D. R. Tovey; E. Tziaferi; R. J. Walker; H. Wang; J. White; F. L. H. Wolfs

    2007-01-31T23:59:59.000Z

    Results are presented from the first underground data run of ZEPLIN-II, a 31 kg two phase xenon detector developed to observe nuclear recoils from hypothetical weakly interacting massive dark matter particles. Discrimination between nuclear recoils and background electron recoils is afforded by recording both the scintillation and ionisation signals generated within the liquid xenon, with the ratio of these signals being different for the two classes of event. This ratio is calibrated for different incident species using an AmBe neutron source and Co-60 gamma-ray sources. From our first 31 live days of running ZEPLIN-II, the total exposure following the application of fiducial and stability cuts was 225 kgxdays. A background population of radon progeny events was observed in this run, arising from radon emission in the gas purification getters, due to radon daughter ion decays on the surfaces of the walls of the chamber. An acceptance window, defined by the neutron calibration data, of 50% nuclear recoil acceptance between 5 keVee and 20 keVee, had an observed count of 29 events, with a summed expectation of 28.6+/-4.3 gamma-ray and radon progeny induced background events. These figures provide a 90% c.l. upper limit to the number of nuclear recoils of 10.4 events in this acceptance window, which converts to a WIMP-nucleon spin-independent cross-section with a minimum of 6.6x10^-7 pb following the inclusion of an energy dependent, calibrated, efficiency. A second run is currently underway in which the radon progeny will be eliminated, thereby removing the background population, with a projected sensitivity of 2x10^-7 pb for similar exposures as the first run.

  8. Real-Time Active Cosmic Neutron Background Reduction Methods

    SciTech Connect (OSTI)

    Mukhopadhyay, Sanjoy; Maurer, Richard; Wolff, Ronald; Mitchell, Stephen; Guss, Paul

    2013-09-01T23:59:59.000Z

    Neutron counting using large arrays of pressurized 3He proportional counters from an aerial system or in a maritime environment suffers from the background counts from the primary cosmic neutrons and secondary neutrons caused by cosmic ray?induced mechanisms like spallation and charge-exchange reaction. This paper reports the work performed at the Remote Sensing Laboratory–Andrews (RSL-A) and results obtained when using two different methods to reduce the cosmic neutron background in real time. Both methods used shielding materials with a high concentration (up to 30% by weight) of neutron-absorbing materials, such as natural boron, to remove the low-energy neutron flux from the cosmic background as the first step of the background reduction process. Our first method was to design, prototype, and test an up-looking plastic scintillator (BC-400, manufactured by Saint Gobain Corporation) to tag the cosmic neutrons and then create a logic pulse of a fixed time duration (~120 ?s) to block the data taken by the neutron counter (pressurized 3He tubes running in a proportional counter mode). The second method examined the time correlation between the arrival of two successive neutron signals to the counting array and calculated the excess of variance (Feynman variance Y2F)1 in the neutron count distribution from Poisson distribution. The dilution of this variance from cosmic background values ideally would signal the presence of man-made neutrons.2 The first method has been technically successful in tagging the neutrons in the cosmic-ray flux and preventing them from being counted in the 3He tube array by electronic veto—field measurement work shows the efficiency of the electronic veto counter to be about 87%. The second method has successfully derived an empirical relationship between the percentile non-cosmic component in a neutron flux and the Y2F of the measured neutron count distribution. By using shielding materials alone, approximately 55% of the neutron flux from man-made sources like 252Cf or Am-Be was removed.

  9. Statistical Analysis and Interpretation of Building Characterization, Indoor Environmental Quality Monitoring and Energy Usage Data from Office Buildings and Classrooms in the United States

    SciTech Connect (OSTI)

    Linda Stetzenbach; Lauren Nemnich; Davor Novosel

    2009-08-31T23:59:59.000Z

    Three independent tasks had been performed (Stetzenbach 2008, Stetzenbach 2008b, Stetzenbach 2009) to measure a variety of parameters in normative buildings across the United States. For each of these tasks 10 buildings were selected as normative indoor environments. Task 1 focused on office buildings, Task 13 focused on public schools, and Task 0606 focused on high performance buildings. To perform this task it was necessary to restructure the database for the Indoor Environmental Quality (IEQ) data and the Sound measurement as several issues were identified and resolved prior to and during the transfer of these data sets into SPSS. During overview discussions with the statistician utilized in this task it was determined that because the selection of indoor zones (1-6) was independently selected within each task; zones were not related by location across tasks. Therefore, no comparison would be valid across zones for the 30 buildings so the by location (zone) data were limited to three analysis sets of the buildings within each task. In addition, differences in collection procedures for lighting were used in Task 0606 as compared to Tasks 01 & 13 to improve sample collection. Therefore, these data sets could not be merged and compared so effects by-day data were run separately for Task 0606 and only Task 01 & 13 data were merged. Results of the statistical analysis of the IEQ parameters show statistically significant differences were found among days and zones for all tasks, although no differences were found by-day for Draft Rate data from Task 0606 (p>0.05). Thursday measurements of IEQ parameters were significantly different from Tuesday, and most Wednesday measures for all variables of Tasks 1 & 13. Data for all three days appeared to vary for Operative Temperature, whereas only Tuesday and Thursday differed for Draft Rate 1m. Although no Draft Rate measures within Task 0606 were found to significantly differ by-day, Temperature measurements for Tuesday and Thursday showed variation. Moreover, Wednesday measurements of Relative Humidity within Task 0606 varied significantly from either Tuesday or Thursday. The majority of differences in IEQ measurements by-zone were highly significant (p<0.001), with the exception of Relative Humidity in some buildings. When all task data were combined (30 buildings) neither the airborne culturable fungi nor the airborne non-culturable spore data differed in the concentrations found at any indoor location in terms of day of collection. However, the concentrations of surface-associated fungi varied among the day of collection. Specifically, there was a lower concentration of mold on Tuesday than on Wednesday, for all tasks combined. As expected, variation was found in the concentrations of both airborne culturable fungi and airborne non-culturable fungal spores between indoor zones (1-6) and the outdoor zone (zone 0). No variation was found among the indoor zones of office buildings for Task 1 in the concentrations of airborne culturable fungi. However, airborne non-culturable spores did vary among zones in one building in Task 1 and variation was noted between zones in surface-associated fungi. Due to the lack of multiple lighting measurements for Tasks 13 and 0606, by-day comparisons were only performed for Task 1. No statistical differences were observed in lighting with respect to the day of collection. There was a wide range of variability by-zone among seven of the office buildings. Although few differences were found for the brightest illumination of the worksurface (IllumWkSfcBrtst) and the darkest illumination of the worksurface (IllumWkSfcDrkst) in Task 1, there was considerable variation for these variables in Task 13 and Task 0606 (p < 0.001). Other variables that differed by-zone in Task 13 include CombCCT and AmbCCT1 for S03, S07, and S08. Additionally, AmbChromX1, CombChromY, and CombChromX varied by-zone for school buildings S02, S04, and S05, respectively. Although all tasks demonstrated significant differences in sound measurements by zone, some of the buil

  10. Bioinspired synthesis of magnetic nanoparticles

    SciTech Connect (OSTI)

    David, Anand

    2009-05-26T23:59:59.000Z

    The synthesis of magnetic nanoparticles has long been an area of active research. Magnetic nanoparticles can be used in a wide variety of applications such as magnetic inks, magnetic memory devices, drug delivery, magnetic resonance imaging (MRI) contrast agents, and pathogen detection in foods. In applications such as MRI, particle uniformity is particularly crucial, as is the magnetic response of the particles. Uniform magnetic particles with good magnetic properties are therefore required. One particularly effective technique for synthesizing nanoparticles involves biomineralization, which is a naturally occurring process that can produce highly complex nanostructures. Also, the technique involves mild conditions (ambient temperature and close to neutral pH) that make this approach suitable for a wide variety of materials. The term 'bioinspired' is important because biomineralization research is inspired by the naturally occurring process, which occurs in certain microorganisms called 'magnetotactic bacteria'. Magnetotactic bacteria use biomineralization proteins to produce magnetite crystals having very good uniformity in size and morphology. The bacteria use these magnetic particles to navigate according to external magnetic fields. Because these bacteria synthesize high quality crystals, research has focused on imitating aspects of this biomineralization in vitro. In particular, a biomineralization iron-binding protein found in a certain species of magnetotactic bacteria, magnetospirillum magneticum, AMB-1, has been extracted and used for in vitro magnetite synthesis; Pluronic F127 gel was used to increase the viscosity of the reaction medium to better mimic the conditions in the bacteria. It was shown that the biomineralization protein mms6 was able to facilitate uniform magnetite synthesis. In addition, a similar biomineralization process using mms6 and a shorter version of this protein, C25, has been used to synthesize cobalt ferrite particles. The overall goal of this project is to understand the mechanism of magnetite particle synthesis in the presence of the biomineralization proteins, mms6 and C25. Previous work has hypothesized that the mms6 protein helps to template magnetite and cobalt ferrite particle synthesis and that the C25 protein templates cobalt ferrite formation. However, the effect of parameters such as the protein concentration on the particle formation is still unknown. It is expected that the protein concentration significantly affects the nucleation and growth of magnetite. Since the protein provides iron-binding sites, it is expected that magnetite crystals would nucleate at those sites. In addition, in the previous work, the reaction medium after completion of the reaction was in the solution phase, and magnetic particles had a tendency to fall to the bottom of the medium and aggregate. The research presented in this thesis involves solid Pluronic gel phase reactions, which can be studied readily using small-angle x-ray scattering, which is not possible for the solution phase experiments. In addition, the concentration effect of both of the proteins on magnetite crystal formation was studied.

  11. Cle Elum and Supplementation Research Facility : Monthly Progress Report October 2008.

    SciTech Connect (OSTI)

    Cle Elum Supplementation and Research Facility

    2008-12-11T23:59:59.000Z

    FISH PRODUCTION: On October 7th the 2008 spawning season was completed. 823 adults were transferred to the facility for the 2008 season. The overall adult mortality was 6.9% (1.3% pre-spawning mortality and 5.6% encountered after sorting). Wild/natural salmon collected included 278 females, 173 males, and 29 jacks for a total 480 fish for the 2008 brood. Supplemented brood stock collected included 149 adults (85 females, 35 males and 29 jacks). Hatchery control brood collected for research included 194 adults (91 females, 68 males and 35 jacks). Eggs will be inventoried in November with an actual summary of eggs numbers to be submitted for the November report. The estimated egg takes (production) for the 2008 season was 1,375,146 eggs with 1,006,063 comprising of W x W crosses and 250,755 eggs of H x H crosses with 118,328 supplement crosses. Total fish on hand for the 2007 brood is 768,751 with an average fish per pound of 30.6 f/lb. FISH CULTURE: The marking and pit-tagging operation started on October 13th. The pit-tagging portion was completed on October 23rd. A total 40,000 juveniles were pit-tagged (2,000 from each of the production ponds and 4,000 each for the hatchery juvenile ponds 9 & 10). Cle Elum staff began shocking, sorting, counting and splitting eggs in incubation. Shocking eggs will separate live eggs from dead eggs. Eggs are treated with formalin three times a week to control fungus. The focus for the culturists during the month of October entail completing the final spawn (egg take) on the 7th, pond cleaning, keeping the marking trailers supplied with fish and end of month sampling. The adult holding ponds were power washed and winterized for the shut down period. Facility crew members Greg Strom and Mike Whitefoot assisted Joe Blodgett and his crew with fish brood collection on the 22nd of October. Fall Chinook and Coho salmon were seined up and put in tanker trucks from Chandler canal and transported to holding ponds for later spawning. Charlie, Simon and Vernon assisted with sorting and spawning Summer Chinook at the Wells hatchery for the Summer Chinook reintroduction program on the lower Yakima River. WATER PRODUCTION: The current combined well and river water supply to the complex is 12,909 gallons/min. Four river pumps (12,400gpm) and one well pump No.2 (509gpm) are supplying water to the facility main head box and the egg incubation building. ACCLIMATION SITES: Easton had much activity in October, the electrical power panel that's switches commercial power operation to generator power (transfer switch) malfunctioned. Charlie called Wallace Electric as well as ASCO Services to trouble shoot the problem which has yet to be determined. Heaters have been turned on in all service buildings at the acclimation sites. Pacific States Marine Fisheries Commission traveled to Easton to install a pole to mount a satellite and a new ups backup system with new monitors and computers for pit tag data recording and transmitting. Brown and Jackson pumped out the septic tanks at Easton and Clark Flat. AMB Tools performed maintenance on the compressors at the acclimation sites as well as Cle Elum (5 total). VEHICLE MAINTENANCE: Day Wireless performed maintenance on all handheld and vehicle radios. Day Wireless repaired radio communications (static noise) on the 6th also. All vehicles mileages and conditions are reported monthly to Toppenish. Cle Elum staff continues to clean and maintain all facility vehicles weekly. MAINTENANCE BUILDING MAINTENANCE: Kevin of Raincountry was called in response to repairs needed to the water chiller system. Cle Elum staff winterized all irrigation as well as shop grounds. Brown and Jackson pumped out the septic tank at the hatchery on the 22nd. HATCHERY BUILDING MAINTENANCE: The incubation room has been set up for transfer of eggs from isolation buckets to vertical stacks, temperature units are recorded daily. RESENTDENTIAL HOUSING: Residents irrigation has been winterized and fall fertilizer was applied to all grass on facility. Four Seasons performed maintenance on all heating sy