Sample records for nty syc amore

  1. Maintenance Testing of Mixed-Signal Boards: the FCB Technical Report LiSyc, UBO Brest (France), June 2005

    E-Print Network [OSTI]

    Boyer, Edmond

    a part of his work. In maintenance, one may distinguish preventive maintenance from corrective1 Maintenance Testing of Mixed-Signal Boards: the FCB case study Technical Report LiSyc, UBO Brest, Fax: +33 298 340 986 bruno.castel@isismpp.fr Keywords: Maintenance testing, mixed-signal board testing

  2. U.S. Department of Energy and NTI Announce Key Nonproliferation...

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

    Agreement Reached To Downblend HEU and Convert Reactor WASHINGTON, D.C. - The U.S. Department of Energy and the Nuclear Threat Initiative (NTI) today announced that they have...

  3. Context-dependent protein folding of a virulence peptide in the bacterial and host environments: structure of an SycH–YopH chaperone–effector complex

    SciTech Connect (OSTI)

    Vujanac, Milos; Stebbins, C. Erec, E-mail: stebbins@rockefeller.edu [The Rockefeller University, New York, NY 10065 (United States)

    2013-04-01T23:59:59.000Z

    The structure of a SycH–YopH chaperone–effector complex from Yersinia reveals the bacterial state of a protein that adopts different folds in the host and pathogen environments. Yersinia pestis injects numerous bacterial proteins into host cells through an organic nanomachine called the type 3 secretion system. One such substrate is the tyrosine phosphatase YopH, which requires an interaction with a cognate chaperone in order to be effectively injected. Here, the first crystal structure of a SycH–YopH complex is reported, determined to 1.9 Å resolution. The structure reveals the presence of (i) a nonglobular polypeptide in YopH, (ii) a so-called ?-motif in YopH and (iii) a conserved hydrophobic patch in SycH that recognizes the ?-motif. Biochemical studies establish that the ?-motif is critical to the stability of this complex. Finally, since previous work has shown that the N-terminal portion of YopH adopts a globular fold that is functional in the host cell, aspects of how this polypeptide adopts radically different folds in the host and in the bacterial environments are analysed.

  4. El amor en la poesia de Ernesto Cardenal

    E-Print Network [OSTI]

    Lorenzo, Mary Cooley

    1995-01-01T23:59:59.000Z

    presenta un enfoque del amor d d 1 p t ~ d t t d Pl t6 lit, S~tt que describe al amor camo una bnsqueda del obJeto amado. Tambikn se presenta un analisls del Evangelic de San Juan para presentar la relaci6n de amor entre Dios y los hombres. En el se... grupo de poseedores de amor son los discipulos cuando Cristo dice, "Les doy un nuevo mandamiento: "Am%os los unos a los otros; asi coma yo os he amado, vosotros debacle amaros los unos a los otros. Por medio de este amor que vosotros tengdis para los...

  5. Usage Patterns of the Java Standard API Homan Ma, Robert Amor, Ewan Tempero

    E-Print Network [OSTI]

    Amor, Robert

    Usage Patterns of the Java Standard API Homan Ma, Robert Amor, Ewan Tempero Department of Computer,ewan}@cs.auckland.ac.nz Abstract The Java Standard API has grown enormously since Java's be- ginnings, now consisting of over 3 to help determine the "typical" usage of the Standard API. We find that, in an extensive corpus of open

  6. Indexing the Java API Using Source Code Homan Ma, Robert Amor, Ewan Tempero

    E-Print Network [OSTI]

    Amor, Robert

    Standard API. The rest of this paper is organised as follows. In the next section, we discuss related workIndexing the Java API Using Source Code Homan Ma, Robert Amor, Ewan Tempero Department of Computer code as the basis for the index. Keywords: Java Standard API, Software Repositories, Source Code

  7. “Como pella a las dueñas, tomelo quien podiere”: anacronismo y representación en las adaptaciones cinemáticas del Libro de buen amor dirigidas por Tomás Aznar y Jaime Bayarri

    E-Print Network [OSTI]

    Drayson, E. A.

    2015-01-01T23:59:59.000Z

    uno de los cambios intrigantes y eficaces al original creados por Aznar. ‘Buen amor’ no refiere ni una sola vez al amor de Dios en esta película, sino siempre al amor de las mujeres. El protagonista no es arcipreste, sino amante y poeta. Es posible... reinvención creativa que expresa, mientras el enfoque inicial sobre la silueta sola del poeta alude a su independencia de espíritu rebelde que se manifiesta al desarrollarse la narrativa. Como Aznar, Bayarri emplea un montaje de episodios clave del poema...

  8. Son decenas y estn por toda Amrica Latina. Tienen en comn su amor por la ciencia y una curiosidad del tamao

    E-Print Network [OSTI]

    Barbosa, Marcia C. B.

    Son decenas y están por toda América Latina. Tienen en común su amor por la ciencia y una la Red Inter-Americana de Academias de Ciencias (IANAS, por sus siglas en inglés), la Unesco, la ONU mujeres que lideran la ciencia en América Latina Margarita Rodríguez BBC Mundo Miércoles, 16 de octubre de

  9. SAN LUIS OBISPO COU NTY DEPARTMENT OF PLANNING AND BUILDING

    E-Print Network [OSTI]

    95814-5514 Re: Application for Approval of the San Luis Obispo County Green Building Ordinance the Green Building Ordinance and the Energy Cost Effective Study. The Board of Supervisors received the Green Building Ordinance which will ensure that residential and non-residential buildings in the County

  10. AMoRE: Collaboration for searches for the neutrinoless double-beta decay of the isotope of {sup 100}Mo with the aid of {sup 40}Ca{sup 100}MoO{sub 4} as a cryogenic scintillation detector

    SciTech Connect (OSTI)

    Khanbekov, N. D., E-mail: xanbekov@gmail.com [Institute of Theoretical and Experimental Physics (Russian Federation)

    2013-09-15T23:59:59.000Z

    The AMoRE (Advanced Mo based Rare process Experiment) Collaboration is planning to employ {sup 40}Ca{sup 100}MoO{sub 4} single crystals as a cryogenic Scintillation detector for studying the neutrinoless double-beta decay of the isotope {sup 100}Mo. A simultaneous readout of phonon and scintillation signals is performed in order to suppress the intrinsic background. The planned sensitivity of the experiment that would employ 100 kg of {sup 40}Ca{sup 100}MoO{sub 4} over five years of data accumulation would be T{sub 1/2}{sup 0{nu}} = 3 Multiplication-Sign 10{sup 26} yr, which corresponds to values of the effective Majorana neutrino mass in the range of Left-Pointing-Angle-Bracket m{sub {nu}} Right-Pointing-Angle-Bracket {approx} 0.02-0.06 eV.

  11. IVOL.SEVENTEEN,NUMBER TWE.NTY DEC. 1, 1971, VANCOUVER 5, F.C.

    E-Print Network [OSTI]

    Farrell, Anthony P.

    . It may be timber companies tryingto keep urban Unlessthe proposed UBC experiment works. MONEY SOUGHT forests. cattlemen driving off sheepherdersand grain farmers. recreationists out of their timber stands

  12. u.s DEPARTMENT OF ENERGY EERE PROJECT MANAGEMENT CENTER NTI'A...

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

    1 of3 RECIPIENT:Commerce Authority, Arizona STATE: AZ. PROJECf TITLE: Assisting the Tooling and Machining Industry to Become Energy Efficient Funding Opportunity Announcement...

  13. U.S. Department of Energy and NTI Announce Key Nonproliferation Project

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2, 2015 -Helicopter Accident at RatonU.S.Adoption ofWind andParticleSolar

  14. U.S. Department of Energy and NTI Announce Key Nonproliferation Project

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently AskedEnergyIssuesEnergyTransportation& ForumVersion: JuneDiscussionwith

  15. REJOI NDER: UNCERTAI NTY A ND DECISION As we (Halpern et al. 2006) and Mangel (2006) point out,

    E-Print Network [OSTI]

    Queensland, University of

    2006-01-01T23:59:59.000Z

    paper assumes a risk-averse decision maker at the outset. Other methods of uncertainty analysis and attitudes to risk in order to make a final decision. But even when a decision is based upon a model a management plan needs to be and then model appropriate management solutions. Tools for making decisions under

  16. amor viva primera: Topics by E-print Network

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

    aguas Fracking a nivel mundial Fracking en Espaa Bibliograf-a 12;Historia del Fracking En 1949: "Stanolind Oil" us por primera vez la fractura hidrulica para...

  17. amor se encontram: Topics by E-print Network

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

    using three different effective interactions. A. Gade; T. Baugher; D. Bazin; B. A. Brown; C. M. Campbell; T. Glasmacher; G. F. Grinyer; M. Honma; S. McDaniel; R. Meharchand;...

  18. El amor en la poesia de Ernesto Cardenal 

    E-Print Network [OSTI]

    Lorenzo, Mary Cooley

    1995-01-01T23:59:59.000Z

    a los mas necesitadas por medio de su trabajo coma sacerdote cat61ico, con su participaci6n politica, con su trabajo en comunidades y con su poesia. El objetivo de Cardenal es escribir poesia accesible a todos los nicaragiIenses. Ernesto Cardenal.... Curs6 estudios de posgraduado en la Universidad de Columbia, Eueva York, donde fue influido por las ideas literarias de Ezra Pound. Posteriormente estudi6 en el monasterio trapense de Kentucky (donde conoci6 a Thomas Merton), en el seminario...

  19. Sic et non en el Libro de buen amor 

    E-Print Network [OSTI]

    Hinton, Melvin

    1999-01-01T23:59:59.000Z

    This thesis studies the concept of sic et non (the paradox of systematically acting in a way which contradicts one's beliefs or of simultaneously holding two contradictory beliefs) in the LBA and its cultural milieu, ...

  20. Sic et non en el Libro de buen amor

    E-Print Network [OSTI]

    Hinton, Melvin

    1999-01-01T23:59:59.000Z

    . Si durante gran parte de la Edad Media, a pesar de cualquier dureza que se acostumbra asociar con lo medieval, el hombre humilde vivia en armonia con su medio ambiente (Bishop 266-67), cuando llegamos al siglo catorce, e incluso antes, encontramos...). La prosperidad economica aumento el numero de personas que disponian del tiempo libre para especular acerca de su suerte dentro del cosmos y de los medios materiales para disfrutar el ocio (Bishop 279-80). Puesto que las capas superiores de la...

  1. Per Ovidio parla Amore, sì come se fosse persona umana (V.N. XXV): The case for Ovid's figure of Amore in Dante's Vita Nuova

    E-Print Network [OSTI]

    Roglieri, Maria Ann

    2007-01-01T23:59:59.000Z

    on Ovid's originai MARIA ANN ROGLIERI Ali Latin quotationsDante's Vita Nuova Maria Ann Roglieri Department of Romancel OL. 2 12007) I MARIA ANN ROGLIERI Remedia, Anwres, Hewides

  2. Automated classification of A/E/C web content R. Amor & K. Xu

    E-Print Network [OSTI]

    Amor, Robert

    purely on the search terms entered by the user. This means that the web pages which are found are often search en- gine. The premise behind this approach is that it is possible to accurately identify then a user searching for content in a particular area (e.g. by specifying a classification code

  3. La mujer y el amor en El mismo mar de todos los veranos, de Esther Tusquets 

    E-Print Network [OSTI]

    Reed, Linnette Fourquet

    1985-01-01T23:59:59.000Z

    sin inhibiciones de ningun tipo, es visto en multiples posibles vertientes desde una perspectiva puramente f~. El estudio de la trilogfa de Tusquets nos servira para poner de mani- fiesto la busqueda de nuevos valores y actitudes que se esta... nueva literatura. Es sin mas, una intelectual que nos advierte a traves de sus novelas los nuevos derroteros que estan tamando en Espana la mujer y la escritora. El capitulo segundo de este estudio trata de ~car a esta escritora que nos ocupa en el...

  4. Translation of Manufacturer's Product Data for the ARROW Product Search System Leonard Newnham and Robert Amor

    E-Print Network [OSTI]

    Amor, Robert

    design tools (e.g., thermal simulation programs). The main parts of the system comprise the following through a design tool. Second, the main system or Building Object Warehouse (BOW) server. Third below and the system illustrated in fig 1.1. User Environment The user can interact with the BOW system

  5. La mujer y el amor en El mismo mar de todos los veranos, de Esther Tusquets

    E-Print Network [OSTI]

    Reed, Linnette Fourquet

    1985-01-01T23:59:59.000Z

    camo "pura anecdota, " camo algo curioso de 15 scalar pero no para ser tornado en serio. Si se une esto a la idea general de que todo producto creativo femenino era necesariamente de inferior calidad, se explicara en- tonces la sorpresa con que se... acogio a las nuevas escritoras de la talla de Carmen Laforet, Ana Mar&a Natute, ~ Marin Gaite. Estas no solo eran muy fertiles literariamente, sino que de- mostraron la calidad de su obra cuando, en ~tencia con el varon escritor, empezaron a ganar...

  6. How Can You Improve Overall Air Quality in Your Home?

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    . · Allergicreactionscanincludearunnyorstuffynose, coughing,puffyeyes,itching,hives,orarash.Amore seriousreactioncouldbeanasthmaattackorswellingof

  7. Growing up in the shadows: The developmental implications of unauthorized status

    E-Print Network [OSTI]

    Suárez-Orozco, C; Yoshikawa, H; Teranishi, R; Suárez-Orozco, MM

    2011-01-01T23:59:59.000Z

    Review, 35(2), 397–419. Flanagan, C. A. , Gallay, L. S. ,Gill, S. , Gallay, E. E. , & Nti, N. (2005). What doesfor social justice (Flana- gan, Gallay, Gill, Gallay, & Nti,

  8. State-of-the-Art of Social Media Analytics Research

    SciTech Connect (OSTI)

    Gastelum, Zoe N.; Whattam, Kevin M.

    2013-01-01T23:59:59.000Z

    Overview of current state-of-the-art of social media for NTI Working Group III: Societal Verification

  9. Russian Scientists Breach Antarctica's Lake Vostok--Confirmed1 by Christine Dell'Amore for National Geographic News2

    E-Print Network [OSTI]

    South Bohemia, University of

    evidence that21 microbes could live in the subglacial lake, deriving energy from minerals by "eating rocks the ancient lake, the28 team started taking careful steps to ensure the project won't contaminate the lake the ice samples35 could contaminate them, since the Russian team isn't using clean technology in the upper

  10. Play in Uganda: Omweso a Game People

    E-Print Network [OSTI]

    M. B. NSIMBI

    1970-01-01T23:59:59.000Z

    batemye gamuwa ebiti bibiri. Bwe bamala okwesa ebyeso byebimu. Ate abantu abalala bwe bagamba nti omuzannyo ogwoku mawanga agagaliraanye bwe gall mu kika ekimu oba ku

  11. Carocci editore Bollettino di italianistica

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    'esilio dalla politica, l'amore per la politica: lettere familiari di Niccolò Machiavelli e Francesco

  12. La violenza politica come spettro e come trauma in Il Segreto (2003) di Geraldina Colotti e in Arrivederci amore, ciao (2006) di Michele Soavi

    E-Print Network [OSTI]

    Colleoni, Federica

    2008-01-01T23:59:59.000Z

    poetico-utopica lenza politica degli anni In seguito,La violenza politica come spettro e come trauma in IIpiù tema della vic:)lenza politica è stata evidenziata Le

  13. SOMMARIO DELL"OPERA L'INCORONAZIONE DI POPPEA Libretto di Giovanni Francesco Busenello, musica di Claudio Monteverdi (1643)

    E-Print Network [OSTI]

    Bellin, Gianluigi

    dell'amore sulla virtù e sulla fortuna. Ma questo non è l'amore che come in Dante avvicina gli esseri sua consigliera Arnalta la convinzione di avere dalla sua parte l'Amore e la Fortuna e rifiuta i consigli di Arnalta di diffidare dei potenti e della instabile fortuna. Nella scena decima (pp 21-23) dopo

  14. Ecosofía, tecnología y ludismo: una perspectiva ecocrítica al estudio de La raza cósmica, Doña Bárbara, Cien años de soledad, El hablador y Mantra

    E-Print Network [OSTI]

    FLORES, WILLIAMS

    2010-01-01T23:59:59.000Z

    es el tema de la contaminación ambiental que sufre laanencefálicos y la contaminación ambiental producida por lasla muerte, el amor, la contaminación ambiental y elementos

  15. Integer Solutions to Cutting Stock Problems

    E-Print Network [OSTI]

    2010-10-04T23:59:59.000Z

    This work has been partially supported by the Spanish Ministry of Science and Innovation under grant. No. MTM2008 ? 04206. References. [1] H. Ben Amor and

  16. alternative spac method: Topics by E-print Network

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

    of model considered here. Paolo Amore; Francisco Fernandez; Alfredo Raya 2004-12-17 51 An alternative method for calculating the energy of gravitational waves General Relativity &...

  17. alternative experimental method: Topics by E-print Network

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

    of model considered here. Paolo Amore; Francisco Fernandez; Alfredo Raya 2004-12-17 69 An alternative method for calculating the energy of gravitational waves General Relativity &...

  18. alternative methods iccvam: Topics by E-print Network

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

    of model considered here. Paolo Amore; Francisco Fernandez; Alfredo Raya 2004-12-17 52 An alternative method for calculating the energy of gravitational waves General Relativity &...

  19. alternative toxicological methods: Topics by E-print Network

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

    of model considered here. Paolo Amore; Francisco Fernandez; Alfredo Raya 2004-12-17 53 An alternative method for calculating the energy of gravitational waves General Relativity &...

  20. United States-Based Latina Producers of Feature Films (1976-Present): The Role of Community, Creativity, and Currency in Synergistic Authorship

    E-Print Network [OSTI]

    Riojas, Mirasol Aurelia

    2012-01-01T23:59:59.000Z

    out to learn about cinematography and David Peña, personalhowever, insert a cinematography credit on Amor Chicano eswriting, directing, cinematography, editing, visual effects,

  1. Mirar (lo) violento: rebelión y exorcismo en la obra de Evelio Rosero

    E-Print Network [OSTI]

    Martinez, Maria Juliana

    2012-01-01T23:59:59.000Z

    bienestar, amor y compañía sino una estructura de reproducción del macabro orden establecido, un modo de perpetuación de un sistema social

  2. UPS 240.200 Effective Date: 9-19-94

    E-Print Network [OSTI]

    de Lijser, Peter

    UPS 240.200 Effective Date: 9-19-94 University Policy Statement California State University, Fullerton UPS 240.200 POLICY ON AMOROUS OR SEXUAL RELATIONSHIPS BETWEEN FACULTY, STAFF AND STUDENTS Amorous relationship will be deemed to have violated this policy. #12;UPS 240.200 Page 2 of 2 UPS 240.200 Effective

  3. U. S. Science Interests in ITER Gerald A. Navratil

    E-Print Network [OSTI]

    & mode control · high heat-flux metallic technology developed #12;THERE ARE TWO TYPES OF BURNING PLASMA & IGNITION #12;FUSION "SELF-HEATING" POWER BALANCE 274-01/rs FUSION POWER DENSITY: pf = Rf = n f for nT = n V + Pheat ­ { { } } nTi + nTe d3x = 3nTV -heating power Additional heating input loss rate W

  4. PA Regional Nanotechnology Conference Collaborating in Today's Economy

    E-Print Network [OSTI]

    Gilchrist, James F.

    4/23/2009 Present PA Regional Nanotechnology Conference Collaborating in Today's Economy May 27 of green technologies and alternative energy. The PA Initiative for Nanotechnology (PIN), established organizations - Drexel University's DNI, the LNN of Lehigh University, and The Nanotechnology Institute (NTI

  5. About Raising Children (Spanish) 

    E-Print Network [OSTI]

    Warren, Judith L.

    2002-01-04T23:59:59.000Z

    de seguridad, pertenencia y apoyo, sino tambi?n allana las dificultades de la ni?ez. El amor de madre y padre debe ser especial de dos maneras. Primero, el amor debe ser constante e incondi- cional?el amor tiene que estar siempre presente, hasta... para mayores?. a73 ?Ens??eles el valor de la verdad. Repetidas veces recuerdo decirles a los ni?os que si nos dijeran la verdad har?amos todo lo posible para ayudarles, que en saber los datos verdaderos podr?amos tratarcon cualquier declaraci?n err...

  6. The Construction Information Gateway Stephen R Lockley, Construction Informatics, Newcastle University

    E-Print Network [OSTI]

    Amor, Robert

    The Construction Information Gateway Stephen R Lockley, Construction Informatics, Newcastle University Robert Amor, Building Research Establishment Affiliations: Keith Montague, Construction Industry.K. construction industry by: improving the quality and efficiency of buildings and building projects by sharing

  7. Growth of crystalline X-Sic on Si at reduced temperatures by chemical vapor deposition from `silacycllobutane

    E-Print Network [OSTI]

    Steckl, Andrew J.

    gas and the de- simple hydrocarbon, such as propane. The Si-bearing gas is creased operational hazards growth has been reported to pro- duce both monocrystalline layers' at 750 "C and amor- phous layers9 over

  8. Being Blue in Hawai‘i: Politics, Affect, and the Last Queen of Hawai‘i

    E-Print Network [OSTI]

    Harvey, Bruce

    2011-01-01T23:59:59.000Z

    Being Blue in Hawai‘i: Politics, Affect, and the Last Queenmore primarily violated. To be blue in Hawai‘i is to be in amore subtle nuances of being blue in Hawai‘i. Yet also in

  9. Amorphous Silicon-Carbon Nanostructure Photovoltaic Devices

    E-Print Network [OSTI]

    Schriver, Maria Christine

    2012-01-01T23:59:59.000Z

    hydrogen dilution in silane on light induced degradation of hydrogenated amor- phous silicon films for solar photovoltaichydrogen content from 14-22%[76]. Hydrogenated amorphous silicon has promise as a photovoltaic

  10. UNIVERSIDAD DE CONCEPCION ESCUELA DE GRADUADOS

    E-Print Network [OSTI]

    Bürger, Raimund

    este trabajo son realmente invaluables. A mi esposa Sandra, por todo el amor y compa~nia que me ha a pesar de la distancia, me hicieron sentir que estaban siempre a mi lado. A todos los grandes amigos que

  11. JOURNAL OF LATEX CLASS FILES, VOL. 6, NO. 1, JANUARY 2007 1 Boosting 3D-Geometric Features for Efficient Face

    E-Print Network [OSTI]

    (URAC 29), Faculté des Sciences, Université Mohammed V - Agdal, Rabat, Maroc. B. Ben Amor and M. Daoudi - Agdal, Rabat, Maroc. Manuscript received April 19, 2005; revised January 11, 2007. Most existing work

  12. Consumer culture imperialism

    E-Print Network [OSTI]

    De Carvalho, Marcelo Gon?calves

    2010-01-01T23:59:59.000Z

    Vida Com Amor. Deckdisk Brasil, 2006. CD. Bibliography Agee,dos Estados Unidos no Brasil (Dois Séculos de História). RioAs Lutas Sociais no Brasil, 1961-1964. Rio de Janeiro:

  13. Penelopi in viaggio ‘fuori rotta’ nel Decameron e altrove. ‘Metamorfosi’ e scambi nel Mediterraneo medievale

    E-Print Network [OSTI]

    Morosini, Roberta

    2010-01-01T23:59:59.000Z

    l’aiuto ricevuto in una battaglia, tutte navigano immobili,passate di là. Dopo una battaglia tra saraceni e messinesiconcederle il suo amore, una battaglia si scatena. Amadio si

  14. Thermal Performance and Reliability Characterization of Bonded Interface Materials (BIMs): Preprint

    SciTech Connect (OSTI)

    DeVoto, D.; Paret, P.; Mihalic, M.; Narumanchi, S.; Bar-Cohen, A.; Matin, K.

    2014-08-01T23:59:59.000Z

    Thermal interface materials are an important enabler for low thermal resistance and reliable electronics packaging for a wide array of applications. There is a trend towards bonded interface materials (BIMs) because of their potential for low thermal resistivity (< 1 mm2K/W). However, BIMs induce thermomechanical stresses in the package and can be prone to failures and integrity risks. Deteriorated interfaces can result in high thermal resistance in the package and degradation and/or failure of the electronics. DARPA's Thermal Management Technologies program has addressed this challenge, supporting the development of mechanically-compliant, low resistivity nano-thermal interface (NTI) materials. In this work, we describe the testing procedure and report the results of NREL's thermal performance and reliability characterization of an initial sample of four different NTI-BIMs.

  15. INTRODUCTION TO BURNING PLASMA PHYSICS Gerald A. Navratil

    E-Print Network [OSTI]

    TO MANY PEOPLE WHO HELPED... BILL DORLAND BOB GROSS RICH HAWRYLUK ALI MAHDAVI DALE MEADE RIP PERKINS TOM R = nDnT v #12;FUSION "SELF-HEATING" POWER BALANCE 274-01/rs FUSION POWER DENSITY: pf = Rf = n dW dT = n V + Pheat ­ { { } } nTi + nTe d3x = 3nTV -heating power Additional heating input loss

  16. Ash, calcium, phosphorus and magnesium content of the metacarpus of hereford cows under different nutritional and physiological conditions

    E-Print Network [OSTI]

    Haque, Mozammel

    1967-01-01T23:59:59.000Z

    !c-, i, 13&:- ce N, a?d Ila& old Ff. Frost. 1965. Corri!Jr&Lion oL. bone rr &, orp- l?r& acct . ifc raiatioii reich Lhe physical bebav iur of I 'ai'. cd bi&ne, , ) L?curtal He, . 44:33-41. r'' orr!nti ii. , N. , G. '3 . Pa?at t' an 1 I". 'i'(eric i &3...

  17. System software for on-line display support

    E-Print Network [OSTI]

    Curry, Walter Wilson, Jr

    1968-01-01T23:59:59.000Z

    SVSTF!1 SO!'k'kiA!!E FOR ON-LINI! l?SP!, AY SU!'PORT A Thesis hy Walter Wi. lson Curry, Jz. Submitted to the Graduate College of the Texas Agkd Uni versity in Partial fulfillment of the reckuiremen(s for the d gree cf MASTER Ol' SCIENCE May... 1968 Maj or. Sub;cot: COMPUTER SCIENCE SYc T-:M SO1, TplgRP POR ON-LINE DIS?LAY S11PPOBT A I'hesrs by 1'1alter Wiison Our~y, Jr. lpproved as 'to style and oon tet t by ~ (Head of Departmen+) W3 I . de mb (iy mba r, ' May LD68 I wish t. o...

  18. Process for obtaining multiple sheet resistances for thin film hybrid microcircuit resistors

    DOE Patents [OSTI]

    Norwood, David P. (Albuquerque, NM)

    1989-01-01T23:59:59.000Z

    A standard thin film circuit containing Ta.sub.2 N (100 ohms/square) resirs is fabricated by depositing on a dielectric substrate successive layers of Ta.sub.2 N, Ti and Pd, with a gold layer to provide conductors. The addition of a few simple photoprocessing steps to the standeard TFN manufacturing process enables the formation of Ta.sub.2 N+Ti (10 ohms/square) and Ta.sub.2 N+Ti+Pd (1 ohm/square) resistors in the same otherwise standard thin film circuit structure.

  19. The game and furbearing mammals of Big Thicket National Preserve

    E-Print Network [OSTI]

    Norton, William Glenn

    1981-01-01T23:59:59.000Z

    UNIT /g/S FIH HICKORY CREEK SAVAIIINAH U Hanlk Polk Co nty FHI 4 /g Tele/ Co hey TURKEY CREEK UNIT I FRED NECHES BOTTOM B JACK GORE BAYGAI. L UNIT S /Sg /n 'z l o LOBLOLLY i UNIT d+ PS SARATOGA OUNTZE 5 G 22 G SI LSBEE EVA..., a questionnaire (Figs. 6a and 6b) was mailed to all licensed fur trappers in Hardin, Tyler, Polk, and Liberty counties following the 1979-80 trapping season. A list of these individuals was obtained from TP W. The questionnaire, which was similar...

  20. Center for Nanophase Materials Sciences (CNMS) - Nanomaterials Theory

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C oCNMS RESEARCHInstitute (NTI): Computational

  1. Center for Nanophase Materials Sciences (CNMS) - Nanoscale Measurements of

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C oCNMS RESEARCHInstitute (NTI): ComputationalGlass

  2. Center for Nanophase Materials Sciences (CNMS) - News

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C oCNMS RESEARCHInstitute (NTI):

  3. Center for Nanophase Materials Sciences (CNMS) - News

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C oCNMS RESEARCHInstitute (NTI):CNMS News Enhanced

  4. Center for Nanophase Materials Sciences (CNMS) - ORNL develops lignin-based

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C oCNMS RESEARCHInstitute (NTI):CNMS News

  5. Center for Nanophase Materials Sciences (CNMS) - STM for Oxide Surfaces,

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C oCNMS RESEARCHInstitute (NTI):CNMS NewsMolecular

  6. Center for Nanophase Materials Sciences (CNMS) - Selective deuteration

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C oCNMS RESEARCHInstitute (NTI):CNMS

  7. Center for Nanophase Materials Sciences (CNMS) - Soft Condensed Matter

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C oCNMS RESEARCHInstitute (NTI):CNMSDesign Core

  8. Center for Nanophase Materials Sciences (CNMS) - Soft matter synthesis

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C oCNMS RESEARCHInstitute (NTI):CNMSDesign

  9. Bubble guidance of tubular growth in reactionprecipitation Stephanie Thouvenel-Romans, Jason J. Pagano and Oliver Steinbock*

    E-Print Network [OSTI]

    Steinbock, Oliver

    of hollow tubes in the reaction between sodium silicate and cupric sulfate. The latter solution is injected, hollow fibers form in setting Portland cement5,6 as well as in certain corro- sion systems.7­9 More catalytic activity and discovered hierarchical nano- to micrometre structures in overall amor- phous

  10. Chapter 2. International research context The research work on mathematical infinity, which will be described in chapters 3 and

    E-Print Network [OSTI]

    Spagnolo, Filippo

    will be described in chapters 3 and 4, is to be considered within today's scenario of mathematical didactics of fundamental didactics (Henry, 1991; D'Amore, 1999). This notion includes all the basic elements related to the research in mathematical didactics, deriving from the numerous and complex analyses of so-called "triangle

  11. Conference Proceedings distributing knowledge in building Title: An Internet-based Building Simulation Quality

    E-Print Network [OSTI]

    Amor, Robert

    -based Building Simulation Quality Assurance System Author(s): Shengjiang Lu1 , Robert Amor1 and Michael Donn2 describes the development of a distributed building simulation quality control system. The basic premise (building simulation quality assurance) was proposed, building upon the ideals of the semantic web (Donn et

  12. Revista Iguanazul, Number 1

    E-Print Network [OSTI]

    Santopietro, Judith

    - narán mis restos pulverizándolos y mis sales minerales se filtrarán a los ríos y los mantos pluviales formando parte de las estalactitas, y de alguna manera, aunque me tome siglos podré convertirme en la sal marina de tu cabello. Así, amor, podrás...

  13. Effects of carbon doping on superconductivity in magnesium diboride W. Mickelson, John Cumings, W. Q. Han, and A. Zettl*

    E-Print Network [OSTI]

    Zettl, Alex

    ratio and placed in tantalum foil, which was crimped shut. The tantalum foil was heated to 600 °C and then 700 °C for 1­3 h each in a tube furnace under Ar atmosphere. To produce the pure material, amor- phous

  14. `Algebra lineal Enginyeria Quimica

    E-Print Network [OSTI]

    Ramírez-Ros, Rafael

    `Algebra lineal Enginyeria Qu´imica Jaume Amor´os UPC Barcelona 2002/10/11 #12;2 #12;´Index 0 font important d'aquests apunts ha estat un curs d'`Algebra lineal preparat per Cristina Blancafort . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1 Matrius i sistemes lineals 9 1.1 Matrius

  15. DOCUMENTS AS AN ENABLING MECHANISM FOR CONCURRENT ENGINEERING IN THE CONSTRUCTION

    E-Print Network [OSTI]

    Amor, Robert

    DOCUMENTS AS AN ENABLING MECHANISM FOR CONCURRENT ENGINEERING IN THE CONSTRUCTION INDUSTRY R. Amor1 and M. Clift1 ABSTRACT In current engineering practice, be it concurrent or otherwise, documents of concurrent engineering in the industry has to recognise the central role of documents. To date, the various

  16. 1120 IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 53, NO. 5, MAY 2006 Theory of Interface-Trap-Induced NBTI Degradation

    E-Print Network [OSTI]

    Alam, Muhammad A.

    mechanisms that generate traps at the Si-channel/gate-oxide interface of MOSFETs during transistor operation. The semiconductor/oxide interface is a rough surface where the highly ordered crystalline channel and the amor lead to poor device performance; therefore, the transistors are annealed in hydrogen ambient during

  17. UPS 240.200 1 Effective Date: 9-19-94

    E-Print Network [OSTI]

    de Lijser, Peter

    UPS 240.200 1 Effective Date: 9-19-94 UPS 240.200 POLICY ON AMOROUS OR SEXUAL RELATIONSHIPS BETWEEN Policy Statement California State University, Fullerton #12;UPS 240.200 UPS 240.200 2 Effective Date: 9 of this policy. EFFECTIVE DATE: September 19, 1994 [New UPS] Supersedes ASD 94-115 #12;

  18. www.sciencemag.org SCIENCE VOL 314 1 DECEMBER 2006 1391 CREDIT:E.KUNHIKRISHNAN BOOKS ET AL.

    E-Print Network [OSTI]

    Gadagkar, Raghavendra

    Studies: Writings of South Asian History and Society. Inspired and led by their chief men- tor, Ranajit, I likened it to Aladdin's magic lamp and the index to a genie who can "take you to wonderful, unheard-of and even amorous worlds" (10). The Other Insect Societies is a new avatar of the magic lamp

  19. Hole drift mobility measurements in amorphous silicon-carbon alloys Qing Gu, Qi Wang, and Eric A. Schiff

    E-Print Network [OSTI]

    Schiff, Eric A.

    in the elec- tronic properties and photovoltaic performance of amor- phous silicon alloys with widened band.`t As for a a-Sil-,Ge,:H, there is relatively little degradation as the band gap is modified. At the end). Additional information on photovoltaic properties and deposition procedures for similar materials are given

  20. Energetics of hydrogen in amorphous silicon: An ab initio study Blair Tuttle*

    E-Print Network [OSTI]

    Adams, James B

    and diffusion are well under- stood. The details of hydrogen transport and bonding in amor- phous silicon have bonding and diffusion.7 The quantity Ea in Fig. 1 is the activation energy for long-range diffusion, Em to H diffusion in c-Si with the bond center site being the transport level.8,11 Regarding the shallow

  1. Magnetization rotation in a superconductor/ferromagnet bilayer ring structure Diana G. Gheorghe and Rinke J. Wijngaarden

    E-Print Network [OSTI]

    Wijngaarden, Rinke J.

    Magnetization rotation in a superconductor/ferromagnet bilayer ring structure Diana G. Gheorghe and Superconducting Materials Group, Kamerlingh Onnes Laboratory, University Leiden, P.O. Box 9504, 2300 RA Leiden The magnetic-flux distribution in a bilayer ring consisting of superconducting Nb and ferromagnetic amor- phous

  2. mTi 48 mH:=mFe 56 mH:=Masses ETi 6.82 eV:=EFe 7.87 eV:=Ionization potentials

    E-Print Network [OSTI]

    I iFeI e FeI iFeI mFe, V, log UFeI( )- C1++ ...:= ...and abscissas, too: WTiI iTiI wTiI i and Ti II lines: 1 0 1 2 3 4 1.5 1 0.5 0 0.5 1 log W0 i log WFeI iFeI log WTiI iTiI log Ci for Fe I and Ti I lines: lgf log gf( )=logTiI NTiI NFeI =C1 log e 2 m c 2 NFeI Heff = #12;WTi

  3. IRD Sige, 44, boulevard de dunkerque -13572 Marseille cedex 02 Cration d'entreprises -Innovation -Diasporas -Mditerrane

    E-Print Network [OSTI]

    amorçage pour créer leur entreprise en Algérie, au Liban, au Maroc et en Tunisie. PACEIM : de la recherche, ingénieurs, doctorants, en accueil universitaire en France et ressortissants d'Algérie, du Liban, du Maroc ou (CNRST, Maroc) et l'incubateur Berytech au Liban. Enfin, la cinquantaine de candidats présélectionnés à l

  4. V Encuentro de Mujeres de Iberoamérica en las Arts Escénicas

    E-Print Network [OSTI]

    Ortega, Isabel

    2002-10-01T23:59:59.000Z

    las calles de las del trafico de drogas y robos. Hoy su asociación de vecinos es un ejemplo a seguir, contamos FALL 2002 155 con la colaboración de las asociaciones de jóvenes cargadores, ecologistas, comercio, panaderos, artesanos. Creamos el..., tranquilamente transmite optimismo, inteligencia y simpatía. "Estoy mas arregla y más informal. Mi cabeza está buena y sabe lo que quiere. No olvidemos del amor." Martirio. Cádiz ...

  5. Sadhana della divinita solitaria Yamantaka-Vajrabhairava - Traduzione e glossario della version cinese di Nenghai (Parte 2)

    E-Print Network [OSTI]

    Bianchi, Ester

    2006-01-01T23:59:59.000Z

    tempesta, e spiega che “ha la funzione di mostrare che nel cuore si susseguono profondi sentimenti di amore e simpatia nei confronti delle cose del mondo, e che il dharmadhåtu è immutabile”. 15 “(La divinità) presenta trentaquattro mani e braccia, suddivise... Tantra di Yamantaka, op. cit., p. 87, nota 74). 50 L’alabarda arpionata è descritta spesso nei testi come un vajra a punta unica (tib. rdo rje rtse gcig pa): “the single pointed vajra is the destroyer of failings (do?a T nyes pa) of body, speech and mind...

  6. Avoiding Earth Impacts Using Albedo Modification as Applied to 99942 Apophis

    E-Print Network [OSTI]

    Margulieux, Richard Steven

    2011-08-08T23:59:59.000Z

    distances, q, less than 1.3 AU. They can be further classified as Atens, with semi-major axes, a, less than the Earth?s 1.0 AU and aphelion distances, Q, greater than 0.983 AU; Apollos, with a ? 1.0 AU and q ? 1.0167 AU; or Amors, with 1.0167 ? q ? 1... as a workable approximation in this investigation. Other parameters unknown for Apophis; spin axis, surface thermal properties, and mass; increase the potential error in this modeling, but also alias systematic inaccuracy in the model. Once improved...

  7. Evaluation of three-way vs. single-cross hybrids of grain sorghum produced with twin-seeded and single-seeded parents

    E-Print Network [OSTI]

    Perez, German Jose

    1980-01-01T23:59:59.000Z

    -sterile (A) lines; 2 homozygous single-seeded (tsts) and 1 homozygous twin-seeded (~sTs), their 3 non-restorer (B-line) counterparts, and 4 fertility restoring (R-lines); 2 homozygous single-seeded (tats) and 2 homozygous twin-seeded (TsTs) . These 30...-way hybrids when single- vs. twin-seeded and twin- vs ~ single-seeded, as groups, were contrasted ~ DFDICATICN Con Amor a Ko ty Pochito vii ACKNOWLEDGMEBTS I thank my major professor, Dr. Frederick R. Miller, for his advice and criticism during...

  8. Demonstration of simultaneous experiments using thin crystal multiplexing at the Linac Coherent Light Source

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

    Feng, Y.; Alonso-Mori, R.; Barends, T. R. M.; Blank, V. D.; Botha, S.; Chollet, M.; Damiani, D. S.; Doak, R. B.; Glownia, J. M.; Koglin, J. M.; et al

    2015-05-01T23:59:59.000Z

    Multiplexing of the Linac Coherent Light Source beam was demonstrated for hard X-rays by spectral division using a near-perfect diamond thin-crystal monochromator operating in the Bragg geometry. The wavefront and coherence properties of both the reflected and transmitted beams were well preserved, thus allowing simultaneous measurements at two separate instruments. In this report, the structure determination of a prototypical protein was performed using serial femtosecond crystallography simultaneously with a femtosecond time-resolved XANES studies of photoexcited spin transition dynamics in an iron spin-crossover system. The results of both experiments using the multiplexed beams are similar to those obtained separately, using amore »dedicated beam, with no significant differences in quality.« less

  9. Measurement of ?(1S+2S+3S) production in p+p and Au+Au collisions at ?sNN=200 GeV

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

    Adare, A.

    2015-02-01T23:59:59.000Z

    Measurements of bottomonium production in heavy ion and p+p collisions at the Relativistic Heavy Ion Collider (RHIC) are presented. The inclusive yield of the three ? states, ?(1S + 2S + 3S), was measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au+Au and p+p collisions at ?sNN = 200 GeV. The ?(1S + 2S + 3S) ? e?e? differential cross section at midrapidity was found to be Beed?/dy = 108 ± 38 (stat) ± 15 (syst) ± 11 (luminosity) pb in p+p collisions. The nuclear modification factor in the 30% most central Au+Au collisions indicates amore »suppression of the total ? state yield relative to the extrapolation from p+p collision data. The suppression is consistent with measurements at higher energies by the CMS experiment at the Large Hadron Collider.« less

  10. Communication: Kinetics of scavenging of small, nucleating clusters: First nucleation theorem and sum rules

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

    Malila, Jussi; McGraw, Robert; Laaksonen, Ari; Lehtinen, Kari E. J.

    2015-01-07T23:59:59.000Z

    Despite recent advances in monitoring nucleation from a vapor at close-to-molecular resolution, the identity of the critical cluster, forming the bottleneck for the nucleation process, remains elusive. During past twenty years, the first nucleation theorem has been often used to extract the size of the critical cluster from nucleation rate measurements. However, derivations of the first nucleation theorem invoke certain questionable assumptions that may fail, e.g., in the case of atmospheric new particle formation, including absence of subcritical cluster losses and heterogeneous nucleation on pre-existing nanoparticles. Here we extend the kinetic derivation of the first nucleation theorem to give amore »general framework to include such processes, yielding sum rules connecting the size dependent particle formation and loss rates to the corresponding loss-free nucleation rate and the apparent critical size from a naïve application of the first nucleation theorem that neglects them.« less

  11. Characterization and use of the spent beam for serial operation of LCLS

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

    Boutet, Sébastien; Foucar, Lutz; Barends, Thomas R. M.; Botha, Sabine; Doak, R. Bruce; Koglin, Jason E.; Messerschmidt, Marc; Nass, Karol; Schlichting, Ilme; Seibert, M. Marvin; et al

    2015-05-01T23:59:59.000Z

    X-ray free-electron laser sources such as the Linac Coherent Light Source offer very exciting possibilities for unique research. However, beam time at such facilities is very limited and in high demand. This has led to significant efforts towards beam multiplexing of various forms. One such effort involves re-using the so-called spent beam that passes through the hole in an area detector after a weak interaction with a primary sample. This beam can be refocused into a secondary interaction region and used for a second, independent experiment operating in series. The beam profile of this refocused beam was characterized for amore »particular experimental geometry at the Coherent X-ray Imaging instrument at LCLS. A demonstration of this multiplexing capability was performed with two simultaneous serial femtosecond crystallography experiments, both yielding interpretable data of sufficient quality to produce electron density maps.« less

  12. Single Spin Asymmetries of Inclusive Hadrons Produced in Electron Scattering from a Transversely Polarized 3He Target

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

    Allada, Kalyan; Zhao, Yongxiang; Aniol, Konrad; Annand, John; Averett, Todd; Benmokhtar, Fatiha; Bertozzi, William; Bradshaw, Peter; Bosted, Peter; Camsonne, Alexandre; et al

    2014-04-01T23:59:59.000Z

    We report the first measurement of target single-spin asymmetries (AN) in the inclusive hadron production reaction, e + 3He??h+X, using a transversely polarized 3 He target. The experiment was conducted at Jefferson Lab in Hall A using a 5.9-GeV electron beam. Three types of hadrons (?±, K± and proton) were detected in the transverse hadron momentum range 0.54 T F for pions was -0.29 FF+ and K+. Amore »negative asymmetry is observed for ?–. The magnitudes of the asymmetries follow |A? –|? +|K +|. The K– and proton asymmetries are consistent with zero within the experimental uncertainties. The ?+ and ?– asymmetries measured for the 3He target and extracted for neutrons are opposite in sign with a small increase observed as a function of pT.« less

  13. Resonant excitation of coupled Rayleigh waves in a short and narrow fluid channel clad between two identical metal plates

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

    García-Chocano, Victor M.; López-Rios, Tomás; Krokhin, Arkadii; Sanchez-Dehesa, Jose

    2011-12-23T23:59:59.000Z

    Transmission of ultrasonic waves through a slit between two water immersed brass plates is studied for sub-wavelength plate thicknesses and slit apertures. Extraordinary high absorption is observed at discrete frequencies corresponding to resonant excitation of Rayleigh waves on the both sides of the channel. The coupling of the Rayleigh waves occurs through the fluid and the corresponding contribution to the dispersion has been theoretically derived and also experimentally confirmed. Symmetric and anti-symmetric modes are predicted but only the symmetric mode resonances have been observed. It follows from the dispersion equation that the coupled Rayleigh waves cannot be excited in amore »channel with apertures less than the critical one. The calculated critical aperture is in a good agreement with the measured acoustic spectra. These findings could be applied to design a broadband absorptive metamaterial.« less

  14. Measurement of the production cross section ratio ?(?b2(1P)) / ?(?b1(1P)) in pp collisions at ?s = 8 TeV

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

    Khachatryan, Vardan

    2015-04-01T23:59:59.000Z

    A measurement of the production cross section ratio ?(?b2(1P)) / ?(?b1(1P)) is presented. The ?b1 (1P) and ?b2(1P) bottomonium states, promptly produced in pp collisions at ?s=8 TeV , are detected by the CMS experiment at the CERN LHC through their radiative decays ?b1,2(1P) ? ?(1S) + ? . The emitted photons are measured through their conversion to e?e? pairs, whose reconstruction allows the two states to be resolved. The ?(1S) is measured through its decay to two muons. An event sample corresponding to an integrated luminosity of 20.7 fb?¹ is used to measure the cross section ratio in amore »phase-space region defined by the photon pseudorapidity, |??| ?| T? ?b branching fractions.« less

  15. Single-shot hyperspectral coherent Raman planar imaging in the range 0–4200 cm?¹

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

    Bohlin, Alexis; Kliewer, Christopher J.

    2014-10-20T23:59:59.000Z

    We propose a technique for ultrabroadband planar coherent Raman spectroscopy that enables wideband chemically selective mapping of molecular partition functions in the gas-phase within a single-laser-shot. A spectral region spanning 0–4200 cm?¹ is excited simultaneously, in principle allowing for coherent planar imaging of most all fundamental Raman-active modes. This unique instantaneous and spatially correlated assessment enables multiplexed studies of transient dynamical systems in a two-dimensional (2D) field. Here, we demonstrate single-laser-shot high temperature diagnostics of H?, with spatially resolved 2D measurement of transitions of both the pure-rotational H? S-branch and the vibrational H? Q-branch, analyzing the temperature contour of amore »reacting fuel-species as it evolves at a flame-front.« less

  16. Effects of arrival rate and gas pressure on the chemical bonding and composition in titanium nitride films prepared on Si(100) substrates by ion beam and vapor deposition

    SciTech Connect (OSTI)

    Matsuoka, M.; Isotani, S.; Mittani, J.C.R.; Chubaci, J.F.D.; Ogata, K.; Kuratani, N. [Institute of Physics, University of Sao Paulo, C. P. 66318, 05315-970, Sao Paolo, SP (Brazil); Nissin Electric Company, Ltd., 47, Umezu-Takase-cho, Ukyo-ku, Kyota 615-8686 (Japan)

    2005-01-01T23:59:59.000Z

    Thin titanium nitride films were prepared at room temperature by titanium metal vapor deposition on silicon substrates with simultaneous irradiation by a 2 keV nitrogen ion beam. Arrival rate ratios, ARR(N/Ti), defined as the ratio of the flux of incident atomic nitrogen particles in the ion beam relative to the flux of titanium atoms transported to the substrate, ranged from 0.17 to 2.5. The gas pressure in the vacuum chamber was maintained at 1.3x10{sup -3} or 6.7x10{sup -3} Pa during the deposition and irradiation process. Analyses of Ti 2p x-ray photoelectron spectroscopy spectra indicated the presence of metal Ti{sup 0}, nitride TiN, oxide TiO{sub 2}, oxynitride TiN{sub x}O{sub y}, and carbide TiC phases. The Ti{sup 0} phase was observed exclusively and predominantly in the films prepared at 1.3x10{sup -3} Pa and ARR(N/Ti)=0.17, 0.21, and 0.28, and the TiN phase is major in the others, as confirmed by the x-ray diffractometry analyses. The chemical composition ratio N/Ti in the films prepared at 1.3x10{sup -3} Pa increased linearly with increasing ARR(N/Ti) up to ARR(N/Ti)=0.42 and tended to be constant with further increase in ARR(N/Ti), while this ratio in the films prepared at 6.7x10{sup -3} Pa was almost constant independently of ARR(N/Ti), similar to the constant value observed at 1.3x10{sup -3} Pa and higher ARR(N/Ti). This dependence may be understood by comparison with the flux of evaporated titanium atoms, the flux of nitrogen in the beam, and the impingement rate of nitrogen gas in the vacuum chamber, evaluated through the kinetic theory of gases. On the other hand, titanium is known to be one of the chemically active materials which form stable compounds with gases by chemisorption, this fact leading to considerable incorporation of contaminant oxygen and carbon in the depositing titanium film.

  17. Time-Resolved Imaging of the Microbunching Instability and Energy Spread at the Linac Coherent Light Source

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

    Ratner, D.; Behrens, C.; Deutsches Elektronen-Synchrotron DESY, Hamburg; Ding, Y.; Huang, Z.; Marinelli, A.; Maxwell, T.; Zhou, F.

    2015-03-01T23:59:59.000Z

    The microbunching instability (MBI) is a well known problem for high brightness electron beams and has been observed at accelerator facilities around the world. Free-electron lasers (FELs) are particularly susceptible to MBI, which can distort the longitudinal phase space and increase the beam’s slice energy spread (SES). Past studies of MBI at the Linac Coherent Light Source (LCLS) relied on optical transition radiation to infer the existence of microbunching. With the development of the x-band transverse deflecting cavity (XTCAV), we can for the first time directly image the longitudinal phase space at the end of the accelerator and complete amore »comprehensive study of MBI, revealing both detailed MBI behavior as well as insights into mitigation schemes. The fine time resolution of the XTCAV also provides the first LCLS measurements of the final SES, a critical parameter for many advanced FEL schemes. Detailed MBI and SES measurements can aid in understanding MBI mechanisms, benchmarking simulation codes, and designing future high- brightness accelerators.« less

  18. Laser acceleration of protons using multi-ion plasma gaseous targets

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

    Liu, Tung-Chang; Shao, Xi; Liu, Chuan-Sheng; Eliasson, Bengt; Hill, W T; Wang, Jyhpyng; Chen, Shih-Hung

    2015-02-01T23:59:59.000Z

    We present a theoretical and numerical study of a novel acceleration scheme by applying a combination of laser radiation pressure and shielded Coulomb repulsion in laser acceleration of protons in multi-species gaseous targets. By using a circularly polarized CO2 laser pulse with a wavelength of 10 ?m—much greater than that of a Ti: Sapphire laser—the critical density is significantly reduced, and a high-pressure gaseous target can be used to achieve an overdense plasma. This gives us a larger degree of freedom in selecting the target compounds or mixtures, as well as their density and thickness profiles. By impinging such amore »laser beam on a carbon–hydrogen target, the gaseous target is first compressed and accelerated by radiation pressure until the electron layer disrupts, after which the protons are further accelerated by the electron-shielded carbon ion layer. An 80 MeV quasi-monoenergetic proton beam can be generated using a half-sine shaped laser beam with a peak power of 70 TW and a pulse duration of 150 wave periods.« less

  19. A 6 kV arbitrary waveform generator for the Tevatron Electron Lens

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

    Pfeffer, H.; Saewert, G.

    2011-11-01T23:59:59.000Z

    This paper reports on a 6 kV modulator built and installed at Fermilab to drive the electron gun anode for the Tevatron Electron Lens (TEL). The TEL was built with the intention of shifting the individual (anti)proton bunch tunes to even out the tune spread among all 36 bunches with the desire of improving Tevatron integrated luminosity. This modulator is essentially a 6 kV arbitrary waveform generator that enables the TEL to define the electron beam intensity on a bunch-by-bunch basis. A voltage waveform is constructed having a 7 {micro}s duration that corresponds to the tune shift requirements of amore »12-bunch (anti)proton beam pulse train. This waveform is played out for any one or all three bunch trains in the Tevatron. The programmed waveform voltages transition to different levels at time intervals corresponding to the 395 ns bunch spacing. Thus, complex voltage waveforms can be played out at a sustained rate of 143 kHz over the full 6 kV output range. This paper describes the novel design of the inductive adder topology employing five transformers. It describes the design aspects that minimize switching losses for this multi-kilovolt, high repetition rate and high duty factor application.« less

  20. Development of nanosecond time-resolved infrared detection at the LEAF pulse radiolysis facility

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

    Grills, David C.; Farrington, Jaime A.; Layne, Bobby H.; Preses, Jack M.; Bernstein, Herbert J.; Wishart, James F.

    2015-04-01T23:59:59.000Z

    When coupled with transient absorption spectroscopy, pulse radiolysis, which utilizes high-energy electron pulses from an accelerator, is a powerful tool for investigating the kinetics and thermodynamics of a wide range of radiation-induced redox and electron transfer processes. The majority of these investigations detect transient species in the UV, visible, or near-IR spectral regions. Unfortunately, the often-broad and featureless absorption bands in these regions can make the definitive identification of intermediates difficult. Time-resolved vibrational spectroscopy would offer much improved structural characterization, but has received only limited application in pulse radiolysis. In this paper, we describe in detail the development of amore »unique nanosecond time-resolved infrared (TRIR) detection capability for condensed-phase pulse radiolysis on a new beam line at the LEAF facility of Brookhaven National Laboratory. The system makes use of a suite of high-power, continuous wave external-cavity quantum cascade lasers as the IR probe source, with coverage from 2330-1051 cm?¹. The response time of the TRIR detection setup is ?40 ns, with a typical sensitivity of ?100 µOD after 4-8 signal averages using a dual-beam probe/reference normalization detection scheme. This new detection method has enabled mechanistic investigations of a range of radiation-induced chemical processes, some of which are highlighted here.« less

  1. Plant salt stress status is transmitted systemically via propagating calcium waves.

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

    Stephan, Aaron B.; Schroeder, Julian I.

    2014-04-29T23:59:59.000Z

    The existence and relevance of rapid long distance signaling in plants is evident to any observer of the nastic movements of the Venus flytrap (Dionaea muscipula) or the sensitive plant (Mimosa pudica). However, all plants require the transmission of sensory information from the site of perception to other tissues to adjust their physiological states according to their environment. It is becoming increasingly apparent that rapid long-distance signals exist throughout the plant kingdom and may be responsible for initiating a multitude of physiological responses: electrical “action potentials” have been shown to convey wounding and saltstress information from leaf-to-leaf (1, 2); amore »“hydraulic signal” transmitted by the direction of water movement within the xylem can mediate long-distance signaling of water stress experienced by the roots to the leaves in Arabidopsis (3); and reactive oxygen species (ROS) have been shown to propagate across a plant and carry stimulus-specific information to a variety of stresses (4). In PNAS, Choi et al. (5) use elegant approaches and present advances demonstrating that calcium can function as a long-distance signaling messenger, propagating in waves from roots and carrying salt-stress signals to induce expression of salt tolerance genes in leaves.« less

  2. Theory of nitrogen doping of carbon nanoribbons: Edge effects

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

    Jiang, Jie; Turnbull, Joseph; Lu, Wenchang; Boguslawski, Piotr; Bernholc, J.

    2012-01-01T23:59:59.000Z

    Nitrogen doping of a carbon nanoribbon is profoundly affected by its one-dimensional character, symmetry, and interaction with edge states. Using state-of-the-art ab initio calculations, including hybrid exact-exchange density functional theory, we find that, for N-doped zigzag ribbons, the electronic properties are strongly dependent upon sublattice effects due to the non-equivalence of the two sublattices. For armchair ribbons, N-doping effects are different depending upon the ribbon family: for families 2 and 0, the N-induced levels are in the conduction band, while for family 1 the N levels are in the gap. In zigzag nanoribbons, nitrogen close to the edge is amore »deep center, while in armchair nanoribbons its behavior is close to an effective-mass-like donor with the ionization energy dependent on the value of the band gap. In chiral nanoribbons, we find strong dependence of the impurity level and formation energy upon the edge position of the dopant, while such site-specificity is not manifested in the magnitude of the magnetization.« less

  3. Top quark mass measurement using the template method at CDF

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

    Aaltonen, T; Alvarez Gonzalez, B; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; Apollinari, G; Appel, J A; Apresyan, A; et al

    2011-06-03T23:59:59.000Z

    We present a measurement of the top quark mass in the lepton+jets and dilepton channels of tt? decays using the template method. The data sample corresponds to an integrated luminosity of 5.6 fb-1 of pp? collisions at Tevatron with ?s = 1.96 TeV, collected with the CDF II detector. The measurement is performed by constructing templates of three kinematic variables in the lepton+jets and two kinematic variables in the dilepton channel. The variables are two reconstructed top quark masses from different jets-to-quarks combinations and the invariant mass of two jets from the W decay in the lepton+jets channel, and amore »reconstructed top quark mass and mT2, a variable related to the transverse mass in events with two missing particles, in the dilepton channel. The simultaneous fit of the templates from signal and background events in the lepton+jets and dilepton channels to the data yields a measured top quark mass of Mtop = 172.1±1.1 (stat)±0.9 (syst) GeV/c2.« less

  4. Measurement of the top-quark mass in the lepton+jets channel using a matrix element technique with the CDF II detector

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

    Aaltonen, T; Alvarez Gonzalez, B; Amerio, S; Amidei, D; Anastassov, A; Annovi, A

    2011-10-14T23:59:59.000Z

    A measurement of the top-quark mass is presented using Tevatron data from proton-antiproton collisions at center-of-mass energy ?s = 1.96 TeV collected with the CDF II detector. Events are selected from a sample of candidates for production of tt? pairs that decay into the lepton+jets channel. The top-quark mass is measured with an unbinned maximum likelihood method where the event probability density functions are calculated using signal and background matrix elements, as well as a set of parameterized jet-to-parton transfer functions. The likelihood function is maximized with respect to the top-quark mass, the signal fraction in the sample, and amore »correction to the jet energy scale (JES) calibration of the calorimeter jets. The simultaneous measurement of the JES correction ({Delta}{sub JES}) amounts to an additional in situ jet energy calibration based on the known mass of the hadronically decaying W boson. Using the data sample of 578 lepton+jets candidate events, corresponding to 3.2 fb-1 of integrated luminosity, the top-quark mass is measured to be mt = 172.4± 1.4 (stat + ?JES) ± 1.3 (syst) GeV/c2.« less

  5. In situ visualization of metallurgical reactions in nanoscale Cu/Sn diffusion couples

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

    Yin, Qiyue; Stach, Eric A.; Gao, Fan; Zhou, Guangwen; Gu, Zhiyong

    2015-01-01T23:59:59.000Z

    The Cu–Sn metallurgical soldering reaction in two-segmented Cu–Sn nanowires is visualized by in-situ transmission electron microscopy. By varying the relative lengths of Cu and Sn segments, we show that the metallurgical reaction starts at ~ 200 ° with the formation of a Cu–Sn solid solution for the Sn/Cu length ratio smaller than 1:5 while the formation of Cu–Sn intermetallic compounds (IMCs) for larger Sn/Cu length ratios. Upon heating the nanowires up to ~ 500 °C, two phase transformation pathways occur, ?-Cu?Sn? ? ?-Cu?Sn ? ?-Cu??Sn?? for nanowires with a long Cu segment and ?-Cu?Sn? ? ?-Cu?Sn ? ?-Cu?Sn with amore »short Cu segment. The dynamic in situ TEM visualization of the evolution of Kirkendall voids demonstrates that Cu diffuses faster both in Sn and IMCs than that of Sn in Cu? and IMCs, which is the underlying cause of the dependence of the IMC formation and associated phase evolution on the relative lengths of the Cu and Sn segments.« less

  6. Gutzwiller charge phase diagram of cuprates, including electron–phonon coupling effects

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

    Markiewicz, R. S.; Seibold, G.; Lorenzana, J.; Bansil, A.

    2015-02-01T23:59:59.000Z

    Besides significant electronic correlations, high-temperature superconductors also show a strong coupling of electrons to a number of lattice modes. Combined with the experimental detection of electronic inhomogeneities and ordering phenomena in many high-Tc compounds, these features raise the question as to what extent phonons are involved in the associated instabilities. Here we address this problem based on the Hubbard model including a coupling to phonons in order to capture several salient features of the phase diagram of hole-doped cuprates. Charge degrees of freedom, which are suppressed by the large Hubbard U near half-filling, are found to become active at amore »fairly low doping level. We find that possible charge order is mainly driven by Fermi surface nesting, with competition between a near-(?, ?) order at low doping and antinodal nesting at higher doping, very similar to the momentum structure of magnetic fluctuations. The resulting nesting vectors are generally consistent with photoemission and tunneling observations, evidence for charge density wave order in YBa?Cu?O7-? including Kohn anomalies, and suggestions of competition between one- and two-q-vector nesting.« less

  7. Stripe order in superconducting La2-xBaxCuO? (0.095?x?0.155)

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

    Hücker, M.; v. Zimmermann, M.; Gu, G. D.; Xu, Z. J.; Wen, J. S.; Xu, Guangyong; Kang, H. J.; Zheludev, A.; Tranquada, J. M.

    2011-03-01T23:59:59.000Z

    The correlations between stripe order, superconductivity, and crystal structure in La2-xBaxCuO? single crystals have been studied by means of x-ray and neutron diffraction as well as static magnetization measurements. The derived phase diagram shows that charge stripe order (CO) coexists with bulk superconductivity in a broad range of doping around x=1/8, although the CO order parameter and correlation length fall off quickly for x?1/8. Except for x=0.155, the onset of CO always coincides with the transition between the orthorhombic and the tetragonal or less orthorhombic low-temperature structures. The CO transition evolves from a sharp drop at low x to amore »more gradual transition at higher x, eventually falling below the structural phase boundary for optimum doping. With respect to the interlayer CO correlations, we find no qualitative change of the stripe stacking order as a function of doping, and in-plane and out-of-plane correlations disappear simultaneously at the transition. Similarly to the CO, the spin stripe order (SO) is also most pronounced at x=1/8. Truly static SO sets in below the CO and coincides with the first appearance of in-plane superconducting correlations at temperatures significantly above the bulk transition to superconductivity (SC). Indications that bulk SC causes a reduction of the spin or charge stripe order could not be identified. We argue that CO is the dominant order that is compatible with SC pairing but competes with SC phase coherence. Comparing our results with data from the literature, we find good agreement if all results are plotted as a function of x' instead of the nominal x, where x' represents an estimate of the actual Ba content, extracted from the doping dependence of the structural transition between the orthorhombic phase and the tetragonal high-temperature phase.« less

  8. Determination of the optical properties of La2-xBaxCuO? for several dopings, including the anomalous x=1/8 phase

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

    Homes, C. C.; Hücker, M.; Li, Q.; Xu, Z. J.; Wen, J. S.; Gu, G. D.; Tranquada, J. M.

    2012-04-01T23:59:59.000Z

    The optical properties of single crystals of the high-temperature superconductor La2-xBaxCuO? have been measured over a wide frequency and temperature range for light polarized in the a-b planes and along the c axis. Three different Ba concentrations have been examined, x=0.095 with a critical temperature Tc=32 K, x=0.125 where the superconductivity is dramatically weakened with Tc?2.4 K, and x=0.145 with Tc?24 K. The in-plane behavior of the optical conductivity for these materials at high temperature is described by a Drude-like response with a scattering rate that decreases with temperature. Below Tc in the x=0.095 and 0.145 materials there is amore »clear signature of the formation of a superconducting state in the optical properties allowing the superfluid density (?s0) and the penetration depth to be determined. In the anomalous 1/8 phase, some spectral weight shifts from lower to higher frequency (?300 cm?¹) on cooling below the spin-ordering temperature Tso?42 K, associated with the onset of spin-stripe order; we discuss alternative interpretations in terms of a conventional density-wave gap versus the response to pair-density-wave superconductivity. The two dopings for which a superconducting response is observed both fall on the universal scaling line ?s0/8?4.4?dcTc, which is consistent with the observation of strong dissipation within the a-b planes. The optical properties for light polarized along the c axis reveal an insulating character dominated by lattice vibrations, superimposed on a weak electronic background. No Josephson plasma edge is observed in the low-frequency reflectance along the c axis for x=1/8; however, sharp plasma edges are observed for x=0.095 and 0.145 below Tc.« less

  9. Structural, thermal, magnetic, and electronic transport properties of the LaNi?(Ge1-xPx)? system

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

    Goetsch, R. J.; Anand, V. K.; Pandey, Abhishek; Johnston, D. C.

    2012-02-01T23:59:59.000Z

    Polycrystalline samples of LaNi?(Ge1-xPx)? (x=0,0.25,0.50,0.75,1) were synthesized and their properties investigated by x-ray diffraction (XRD) measurements at room temperature and by heat capacity Cp, magnetic susceptibility ?, and electrical resistivity ? measurements versus temperature T from 1.8 to 350 K. Rietveld refinements of powder XRD patterns confirm that these compounds crystallize in the body-centered-tetragonal ThCr?Si?-type structure (space group I4/mmm) with composition-dependent lattice parameters that slightly deviate from Vegard's law. The ?(T) measurements showed a positive temperature coefficient for all samples from 1.8 to 300 K, indicating that all compositions in this system are metallic. The low-T Cp measurements yield amore »rather large Sommerfeld electronic specific heat coefficient ?=12.4(2) mJ/mol K² for x=0, reflecting a large density of states at the Fermi energy that is comparable with the largest values found for the AFe?As? class of materials with the same crystal structure. The ? decreases approximately linearly with x to 7.4(1) mJ/mol K² for x=1. The ? measurements show nearly temperature-independent paramagnetic behavior across the entire range of compositions except for LaNi?Ge?, where a broad peak is observed at ?300 K from ?(T) measurements up to 1000 K that may arise from short-range antiferromagnetic correlations in a quasi-two-dimensional magnetic system. High-accuracy Padé approximants representing the Debye lattice heat capacity and Bloch-Grüneisen electron-phonon resistivity functions versus T are presented and are used to analyze our experimental Cp(T) and ?(T) data, respectively, for 1.8K?T?300 K. The T dependences of ? for all samples are well-described over this T range by the Bloch-Grüneisen model, although the observed ?(300 K) values are larger than calculated from this model. A significant T dependence of the Debye temperature determined from the Cp(T) data was observed for each composition. No clear evidence for bulk superconductivity or any other long-range phase transition was found for any of the LaNi?(Ge1-xPx)? compositions studied.« less

  10. The Origin of Apollo Objects

    SciTech Connect (OSTI)

    Perlmutter, Saul

    1984-03-29T23:59:59.000Z

    The source of the Earth-orbit-crossing asteroids has been much debated. (This class of asteroidal bodies includes the Apollo, Aten, and some Amor objects, each with its own orbital characteristics; we shall use the term Apollo objects to mean all Earth-crossers.) It is difficult to find a mechanism which would create new Apollo objects at a sufficient rate to balance the loss due to collision with planets and ejection from the solar system, and thus explain the estimated steady-state number. A likely source is the main asteroid belt, since it has similar photometric characteristics. There are gaps in the main belt which correspond to orbits resonant with the orbits of Jupiter and Saturn, and it has been shown that the resonances can perturb a body into an Earth-crossing orbit. Apollo objects could thus be generated when random collisions between asteroids in the main belt sent fragments into these resonant orbits. Calculations of the creation rate from these random collisions, however, yielcl numbers too low by a factor of four. This rate could be significantly lower given the uncertainty in the efficiency of the resonance mechanism. As an alternative, it was suggested that the evaporation of a comet's volatile mantle as it passes near the sun could provide enough non-gravitational force to move the comet into an orbit with aphelion inside of Jupiter's orbit, and thus safe from ejection from the solar system. The probability of such an event occurring is unknown, although the recent discovery of the 'asteroid' 1983 TB, with an orbit matching that of the Geminid meteor shower, suggests that such a mechanism has occurred at least once. New evidence from paleontology and geophysics, however, suggests a better solution to the problem of the source of the Apollos. M. Davis, P. Hut, and R. A. Muller recently proposed that an unseen companion to the sun passes through the Oort cloud every 28 million years, sending a shower of comets to the Earth; this provides an explanation for the periodicity of the fossil record of extinctions found by D. M. Raup and J. J. Sepkoski. W. Alvarez and R. A. Muller have shown that the craters on the earth have an age distribution with a periodicity and phase consistent with this hypothesis. These periodic comet showers would of course pass through the entire solar system, colliding with other bodies besides the earth. When the target is the asteroid belt, many small comets will have sufficient kinetic energy to disrupt large asteroids. This will generate many more fragments in the resonant orbits than would be generated by random collisions of asteroids with each other, and hence more Apollo objects. In this report, we shall calculate approximately (A) the number of comets per shower which cross the asteroid belt, (B) the probability of collisions with a single asteroid per shower, (C) the number of fragments with radius > 0.5 km which reach Apollo orbits, and (D) the current expected number of Apollos derived from comet/asteroid collisions. Given conservative assumptions, the calculated number is in agreement with observations.

  11. Utilizing rare earth elements as tracers in high TDS reservoir brines in CCS applications

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

    McLing, Travis; Smith, William; Smith, Robert

    2014-01-01T23:59:59.000Z

    In this paper we report the result of research associated with the testing of a procedures necessary for utilizing natural occurring trace elements, specifically the Rare Earth Elements (REE) as geochemical tracers in Carbon Capture and Storage (CCS) applications. Trace elements, particularly REE may be well suited to serve as in situ tracers for monitoring geochemical conditions and the migration of CO?-charged waters within CCS storage systems. We have been conducting studies to determine the efficacy of using REE as a tracer and characterization tool in the laboratory, at a CCS analogue site in Soda Springs, Idaho, and at amore »proposed CCS reservoir at the Rock Springs Uplift, Wyoming. Results from field and laboratory studies have been encouraging and show that REE may be an effective tracer in CCS systems and overlying aquifers. In recent years, a series of studies using REE as a natural groundwater tracer have been conducted successfully at various locations around the globe. Additionally, REE and other trace elements have been successfully used as in situ tracers to describe the evolution of deep sedimentary Basins. Our goal has been to establish naturally occurring REE as a useful monitoring measuring and verification (MMV) tool in CCS research because formation brine chemistry will be particularly sensitive to changes in local equilibrium caused by the addition of large volumes of CO?. Because brine within CCS target formations will have been in chemical equilibrium with the host rocks for millions of years, the addition of large volumes of CO? will cause reactions in the formation that will drive changes to the brine chemistry due to the pH change caused by the formation of carbonic acid. This CO? driven change in formation fluid chemistry will have a major impact on water rock reaction equilibrium in the formation, which will impart a change in the REE fingerprint of the brine that can measured and be used to monitor in situ reservoir conditions. Our research has shown that the REE signature imparted to the formation fluid by the introduction of CO? to the formation, can be measured and tracked as part of an MMV program. Additionally, this REE fingerprint may serve as an ideal tracer for fluid migration, both within the CCS target formation, and should formation fluids migrate into overlying aquifers. However application of REE and other trace elements to CCS system is complicated by the high salt content of the brines contained within the target formations. In the United States by regulation, in order for a geologic reservoir to be considered suitable for carbon storage, it must contain formation brine with total dissolved solids (TDS) > 10,000 ppm, and in most cases formation brines have TDS well in excess of that threshold. The high salinity of these brines creates analytical problems for elemental analysis, including element interference with trace metals in Inductively Coupled Plasma Mass Spectroscopy (ICP-MS) (i.e. element mass overlap due to oxide or plasma phenomenon). Additionally, instruments like the ICP-MS that are sensitive enough to measure trace elements down to the parts per trillion level are quickly oversaturated when water TDS exceeds much more than 1,000 ppm. Normally this problem is dealt with through dilution of the sample, bringing the water chemistry into the instruments working range. However, dilution is not an option when analyzing these formation brines for trace metals, because trace elements, specifically the REE, which occur in aqueous solutions at the parts per trillion levels. Any dilution of the sample would make REE detection impossible. Therefore, the ability to use trace metals as in situ natural tracers in high TDS brines environments requires the development of methods for pre-concentrating trace elements, while reducing the salinity and associated elemental interference such that the brines can be routinely analyzed by standard ICP-MS methods. As part of the Big Sky Carbon Sequestration Project the INL-CAES has developed a rapid, easy to use proces