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Sample records for likes picasolar wholly

  1. Picasolar

    Broader source: Energy.gov [DOE]

    Picasolar wholly owns the hydrogen selective emitter (HSE) technology. HSE can increase the efficiency of solar cells by up to 15 percent and remove up to 33 percent of the silver grid lines in a conventional silicon solar cell.

  2. STATEMENT OF RECONCILIATION AND COMMITMENT Curtin University of Technology commits itself wholly to a vision of "a united Australia which respects this land

    E-Print Network [OSTI]

    Mucina, Ladislav

    STATEMENT OF RECONCILIATION AND COMMITMENT Curtin University of Technology commits itself wholly to a vision of "a united Australia which respects this land of ours; values the Aboriginal and Torres Strait. Accordingly we reaffirm our commitment to cultural diversity including an informed respect for indigenous

  3. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's

    E-Print Network [OSTI]

    and funded by the Department of Energy, Energy Efficiency and Renewable Energy program office. ·Sandia benchmark, and is based on data collected during the development phase of the project. Because Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy

  4. Pacific Blue Cross, the registered trade-name of PBC Health Benefits Society, is an independent licensee of the Canadian Association of Blue Cross Plans. BC Life is the registered trade-name of British Columbia Life & Casualty Company, a wholly-owned subs

    E-Print Network [OSTI]

    Kavanagh, Karen L.

    ®Pacific Blue Cross, the registered trade-name of PBC Health Benefits Society, is an independent licensee of the Canadian Association of Blue Cross Plans. BC Life is the registered trade-name of British Columbia Life & Casualty Company, a wholly-owned subsidiary of Pacific Blue Cross. CARESnet

  5. TM Pacific Blue Cross, the registered trade-name of PBC Health Benefits Society, is an independent licensee of the Canadian Association of Blue Cross Plans. BC Life is the registered trade-name of British Columbia Life & Casualty Company, a wholly-owned s

    E-Print Network [OSTI]

    Kavanagh, Karen L.

    TM® Pacific Blue Cross, the registered trade-name of PBC Health Benefits Society, is an independent licensee of the Canadian Association of Blue Cross Plans. BC Life is the registered trade-name of British Columbia Life & Casualty Company, a wholly-owned subsidiary of Pacific Blue Cross. CARESnet

  6. Tissue-like phantoms

    DOE Patents [OSTI]

    Frangioni, John V. (Wayland, MA); De Grand, Alec M. (Boston, MA)

    2007-10-30

    The invention is based, in part, on the discovery that by combining certain components one can generate a tissue-like phantom that mimics any desired tissue, is simple and inexpensive to prepare, and is stable over many weeks or months. In addition, new multi-modal imaging objects (e.g., beads) can be inserted into the phantoms to mimic tissue pathologies, such as cancer, or merely to serve as calibration standards. These objects can be imaged using one, two, or more (e.g., four) different imaging modalities (e.g., x-ray computed tomography (CT), positron emission tomography (PET), single photon emission computed tomography (SPECT), and near-infrared (NIR) fluorescence) simultaneously.

  7. Paying for Likes? Understanding Facebook Like Fraud Using Honeypots

    E-Print Network [OSTI]

    De Cristofaro, Emiliano; Jourjon, Guillaume; Kaafar, Mohamed Ali; Shafiq, M Zubair

    2014-01-01

    Facebook pages offer an easy way to reach out to a very large audience as they can easily be promoted using Facebook's advertising platform. Recently, the number of likes of a Facebook page has become a measure of its popularity and profitability, and an underground market of services boosting page likes, aka like farms, has emerged. Some reports have suggested that like farms use a network of profiles that also like other pages to elude fraud protection algorithms, however, to the best of our knowledge, there has been no systematic analysis of Facebook pages' promotion methods. This paper presents a comparative measurement study of page likes garnered via Facebook ads and by a few like farms. We deploy a set of honeypot pages, promote them using both methods, and analyze garnered likes based on likers' demographic, temporal, and social characteristics. We highlight a few interesting findings, including that some farms seem to be operated by bots and do not really try to hide the nature of their operations, w...

  8. Magmatic "Quantum-Like" Systems

    E-Print Network [OSTI]

    Elemer E Rosinger

    2008-12-16

    Quantum computation has suggested, among others, the consideration of "non-quantum" systems which in certain respects may behave "quantum-like". Here, what algebraically appears to be the most general possible known setup, namely, of {\\it magmas} is used in order to construct "quantum-like" systems. The resulting magmatic composition of systems has as a well known particular case the tensor products.

  9. Tokamak-like Vlasov equilibria

    E-Print Network [OSTI]

    Tasso, H

    2014-01-01

    Vlasov equilibria of axisymmetric plasmas with vacuum toroidal magnetic field can be reduced, up to a selection of ions and electrons distributions functions, to a Grad-Shafranov-like equation. Quasineutrality narrow the choice of the distributions functions. In contrast to two-dimensional translationally symmetric equilibria whose electron distribution function consists of a displaced Maxwellian, the toroidal equilibria need deformed Maxwellians. In order to be able to carry through the calculations, this deformation is produced by means of either a Heaviside step function or an exponential function. The resulting Grad-Shafranov-like equations are established explicitly.

  10. AnonyFacebook -Liking Facebook Posts Anonymously

    E-Print Network [OSTI]

    Ferreira, Paulo

    AnonyFacebook - Liking Facebook Posts Anonymously Pedro Alves1 and Paulo Ferreira2 1 Opensoft the simple act of liking (on Facebook) an anti-government article or video can be (and has already been) used to anonymously "like" any post. In this paper we present anonyFacebook, a system that allows Face- book users

  11. What does water look like? Marta Kryven

    E-Print Network [OSTI]

    Waterloo, University of

    is shallow and pure it is transparent. Deep water is a saturated blue-green colour [Pope and Fry 1997]. MuddyWhat does water look like? Marta Kryven William Cowan University of Waterloo (a) (b) (c) (d) (e) (f of water look like water? We conducted four psychophysical experiments to isolate perceptual qualities

  12. Pulse-like and crack-like ruptures in experiments mimicking crustal earthquakes

    E-Print Network [OSTI]

    Lapusta, Nadia

    Pulse-like and crack-like ruptures in experiments mimicking crustal earthquakes Xiao Lu , Nadia ruptures may propagate in a self-healing pulse-like mode. A number of expla- nations for the existence of slip pulses have been proposed and continue to be vigorously debated. This study presents experimen

  13. Indirect signatures for axion(-like) particles

    E-Print Network [OSTI]

    K. Zioutas; K. Dennerl; M. Grande; D. H. H. Hoffmann; J. Huovelin; B. Lakic; S. Orlando; A. Ortiz; Th. Papaevangelou; Y. Semertzidis; Sp. Tzamarias; O. Vilhu

    2006-03-18

    Magnetic field dependent transient solar observations are suggestive for axion-photon oscillations with light axion(-like) particle involvement. Novel dark-moon measurements with the SMART X-ray detectors can be conclusive for radiatively decaying massive exotica like the generic solar Kaluza-Klein axions. Furthermore, the predicted intrinsic strong solar magnetic fields could be the reason of enhanced low energy axion production. Such an axion component could be the as yet unknown origin of the strong quiet Sun X-ray luminosity at energies below 1 keV. Solar axion telescopes should lower their threshold, aiming to copy processes that might occur near the solar surface, be it due to spontaneous or magnetically induced radiative decay of axion(-like) particles. This is motivated also by the recent claim of an axion-like particle detection by the laser experiment PVLAS.

  14. 'Like cupcakes melting in the sun...' /

    E-Print Network [OSTI]

    Skaller, Philip Emmanuel; Skaller, Philip Emmanuel.

    2014-01-01

    cupcakes melting in the sun’ A Dissertation submitted incupcakes melting in the sun’ by Philip Emmanuel SkallerLike cupcakes melting in the sun ’ was a performance of 7

  15. What is the Ocean Like off Oregon?

    E-Print Network [OSTI]

    Kurapov, Alexander

    meters. The sampling grid was reminiscent of the more ambitious CalCOFI survey grid off California, begunWhat is the Ocean Like off Oregon? Exploring, Monitoring, and Understanding the Northern California g o 76 Introduction The dynamic, ever-changing ocean off Oregon is home to a rich, productive

  16. "Wholly Visionary": the American Library Association, the Library of Congress, and the Card Distribution Program

    E-Print Network [OSTI]

    Yee, Martha M

    2009-01-01

    Herbert Putnam and the National Library," in Milestones toof Congress as a National Library," Edlund, "A Monster and aof Congress as a National Library:' Ibid. Charles Harris

  17. "Wholly Visionary": the American Library Association, the Library of Congress, and the Card Distribution Program

    E-Print Network [OSTI]

    Yee, Martha M

    2009-01-01

    States, 1876-1945," Library Trends 25, no. 1 (July 1976):States, 1876-1975." Library Trends 25, no. 1 (July 1976):Interpretive Survey," Library Trends 25, no. 1 (July, 1976):

  18. "Wholly Visionary": the American Library Association, the Library of Congress, and the Card Distribution Program

    E-Print Network [OSTI]

    Yee, Martha M

    2009-01-01

    Development of Classification at the Library of Congress,libraries did not have subject catalogs, relying on shelf classification (the Library itself. If the Dewey Decimal Classification were

  19. State Prisoners' Rights to Medical Treatment: Merely Elusive or Wholly Illusory

    E-Print Network [OSTI]

    Martin, Damon

    1983-01-01

    man- kind' "); Klein, Prisoners'Rights to Health Care, supraat 12 n.71. Note, Prisoners'Rights, 69 GEO. L.J. 591, 609-Medical Treatment of Prisoners as Cruel and Unusual

  20. Balmer-Like Series for Baryon Resonances

    E-Print Network [OSTI]

    Losanow-Kirchbach, M

    1998-01-01

    The pole positions of various baryon resonances have been found to reveal a well pronounced clustering, the so-called H"ohler cluster. In a previous work, the H"ohler clusters have been shown to be identical to Lorentz multiplets of the type (1/2+l', 1/2+l')*[(1/2,0)+(0,1/2)] with l' integer. Here we show that the cluster positions are well described by means of a Balmer-series like recursive mass formula.

  1. Supersymmetry and Vector-like Extra Generation

    E-Print Network [OSTI]

    Chun Liu

    2009-07-17

    Within the framework of supersymmetry, the particle content is extended in a way that each Higgs doublet is in a full generation. Namely in addition to ordinary three generations, there is an extra vector-like generation, and it is the extra slepton SU(2)_L doublets that are taken to be the two Higgs doublets. R-parity violating interactions contain ordinary Yukawa interactions. Breaking of supersymmetry and gauge symmetry are analyzed. Fermion and boson spectra are calculated. Phenomenological constraints and relevant new physics at Large Hadron Collider are discussed.

  2. Template:FacebookLike | 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| Open Energy Information Serbia-EnhancingEt Al., 2013) | Open EnergyDBpediaValue JumpFacebookLike Jump to: navigation,

  3. Polymer-like Nanowires | The Ames 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeeding access|Post-Polymerization Modifications - Energy InnovationPolymer-like

  4. Fermilab | Newsroom | Press Releases | May 23, 2013: Run like...

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

    Images available here: http:www.fnal.govpubpresspasspressreleases2013Run-Like-Proton-20130523-images.html Run like a proton at Fermilabs new playground It's one thing...

  5. Cost-Effectiveness Tests and Measuring Like a Utility | Department...

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

    Cost-Effectiveness Tests and Measuring Like a Utility Cost-Effectiveness Tests and Measuring Like a Utility Better Buildings Residential Data and Evaluation Peer Exchange Call...

  6. Glass-like thermal conductivity in high efficiency thermoelectric...

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

    Glass-like thermal conductivity in high efficiency thermoelectric materials Glass-like thermal conductivity in high efficiency thermoelectric materials Discusses strategies to...

  7. Apparatus for insulating windows and the like

    DOE Patents [OSTI]

    Mitchell, Robert A. (R.D. #1, Box 462-A, Voorheesville, NY 12186)

    1984-01-01

    Apparatus for insulating window openings through walls and the like includes a thermal shutter, a rail for mounting the shutter adjacent to the window opening and a coupling for connecting the shutter to the rail. The thermal shutter includes an insulated panel adhered to frame members which surround the periphery of the panel. The frame members include a hard portion for providing the frame and a soft portion for providing a seal with that portion of the wall adjacent to the periphery of the opening. The coupling means is preferably integral with the attachment rail. According to a preferred embodiment, the coupling means includes a continuous hinge of reduced thickness. The thermal shutter can be permanently attached, hinged, bi-folded, or sliding with respect to the window and wall. A distribution method is to market the apparatus in "kit" form.

  8. Apparatus for insulating windows and the like

    DOE Patents [OSTI]

    Mitchell, R.A.

    1984-06-19

    Apparatus for insulating window openings through walls and the like includes a thermal shutter, a rail for mounting the shutter adjacent to the window opening and a coupling for connecting the shutter to the rail. The thermal shutter includes an insulated panel adhered to frame members which surround the periphery of the panel. The frame members include a hard portion for providing the frame and a soft portion for providing a seal with that portion of the wall adjacent to the periphery of the opening. The coupling means is preferably integral with the attachment rail. According to a preferred embodiment, the coupling means includes a continuous hinge of reduced thickness. The thermal shutter can be permanently attached, hinged, bi-folded, or sliding with respect to the window and wall. A distribution method is to market the apparatus in kit'' form. 11 figs.

  9. Giant Impacts on Earth-like Worlds

    E-Print Network [OSTI]

    Quintana, Elisa V; Borucki, William; Rowe, Jason F; Chambers, John E

    2015-01-01

    The late stages of terrestrial planet formation are dominated by giant impacts that collectively influence the growth, dynamical stability, composition and habitability of any planets that form. Hitherto, numerical models designed to explore these late stage collisions have been limited in two major ways. First, nearly all N-body models have assumed that two-body collisions lead to perfect accretion. Second, many of these studies lack the large number of realizations needed to account for the chaotic nature of these N-body systems. In this article we perform hundreds of simulations of late stage terrestrial planet formation using an N-body algorithm that includes fragmentation and hit-and-run collisions. We performed 140 simulations of planet accretion around a Sun-like star with Jupiter and Saturn analogs with and without this new collision model. We find that when fragmentation is included, the final planets formed are similar to those formed in the perfect-accretion model in terms of mass and number, howev...

  10. New formulas for Stirling-like numbers and Dobinski-like formulas

    E-Print Network [OSTI]

    Kwasniewski, A K

    2008-01-01

    Extensions of the $Stirling$ numbers of the second kind and $Dobinski$ -like formulas are proposed in a series of exercises for graduates. Some of these new formulas recently discovered by me are to be found in the source paper $ [1]$. These extensions naturally encompass the well known $q$- extensions. The indicatory references are to point at a part of the vast domain of the foundations of computer science in arxiv affiliation.

  11. Memristor comprising film with comb-like structure of nanocolumns...

    Office of Scientific and Technical Information (OSTI)

    film with comb-like structure of nanocolumns of metal oxide embedded in a metal oxide matrix Citation Details In-Document Search Title: Memristor comprising film with comb-like...

  12. State Regulatory Framework Will Most Likely Result in Robust...

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

    State Regulatory Framework Will Most Likely Result in Robust CO2 Pipeline System, New Study Says State Regulatory Framework Will Most Likely Result in Robust CO2 Pipeline System,...

  13. Promise for Onion-Like Carbons as Supercapacitors

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

    Promise for Onion-Like Carbons as Supercapacitors Promise for Onion-Like Carbons as Supercapacitors JiangCummingsCoverLarge.gif Some of the capacitance and geometry effects...

  14. June 23, 2009 RAMSEY-LIKE CARDINALS II

    E-Print Network [OSTI]

    Welch, Philip

    June 23, 2009 RAMSEY-LIKE CARDINALS II VICTORIA GITMAN AND PHILIP WELCH Abstract. This paper continues the study of the Ramsey-like large cardinals introduced in [Git09] and [WS08]. Ramsey-like cardinals are defined by gener- alizing the "existence of elementary embeddings" characterization of Ramsey

  15. The Hidden Flat Like Universe: Starobinsky-like inflation induced by f(T) gravity

    E-Print Network [OSTI]

    W. El Hanafy; G. G. L. Nashed

    2015-06-02

    We study a single fluid component in a flat like universe (FLU) governed by $f(T)$ gravity theories, where $T$ is the teleparallel torsion scalar. The FLU model, regardless the value of the spatial curvature $k$, identifies a special class of $f(T)$ gravity theories. Remarkably, the FLU $f(T)$ gravity does not reduce to teleparallel gravity theory. In large Hubble spacetime the theory is consistent with the inflationary universe scenario and respects the conservation principle. The equation of state (EoS) evolves similarly in all models $k=0, \\pm 1$. We study the case when the torsion tensor is made of a scalar field, which enables to derive a quintessence potential from the obtained $f(T)$ gravity theory. The potential produces Starobinsky-like model naturally without using a conformal transformation, with higher orders continuously interpolate between Starobinsky and quadratic inflation models. The slow-roll analysis shows double solutions so that for a single value of the scalar tilt (spectral index) $n_{s}$ the theory can predict double tensor-to-scalar ratios $r$ of $E$-mode and $B$-mode polarizations.

  16. Water-Like Properties of Soft Nanoparticle Suspensions | Advanced...

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

    | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Water-Like Properties of Soft Nanoparticle Suspensions November 25, 2013 Bookmark and Share...

  17. Chaotic physics in ferroelectrics hints at brain-like computing...

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

    Morgan McCorkle Oak Ridge National Laboratory 865-574-7308 Chaotic physics in ferroelectrics hints at brain-like computing Unexpected behavior in ferroelectric materials explored...

  18. Cost-Effectiveness Tests and Measuring Like a Utility | Department...

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

    Data and Evaluation Peer Exchange Call Series: Cost-Effectiveness Tests and Measuring Like a Utility, April 10, 2014. Call Slides and Discussion Summary More Documents &...

  19. Hydrodynamic interactions in metal rod-like particle suspensions...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Hydrodynamic interactions in metal rod-like particle suspensions due to induced charge electroosmosis Citation Details In-Document Search Title: Hydrodynamic...

  20. Global Warming as a Detectable Thermodynamic Marker of Earth-like Extrasolar Civilizations: The Case for a Telescope like

    E-Print Network [OSTI]

    Berdyugina, Svetlana

    1 Global Warming as a Detectable Thermodynamic Marker of Earth-like Extrasolar Civilizations also have broad social implications. Keywords: extraterrestrial civilizations, global warming

  1. Think Python How to Think Like a Computer Scientist

    E-Print Network [OSTI]

    Borenstein, Elhanan

    to Think Like a Computer Scientist Version 1.1.21 Allen Downey Green Tea Press Needham, Massachusetts #12: Major revision, changed title to Think Python: How to Think Like a Computer Scientist. Green Tea Press 9- umentation License. As Green Tea Press, I published the book and started selling hard copies through Amazon

  2. Compositional Compilation for Java-like Languages through Polymorphic Bytecode

    E-Print Network [OSTI]

    Robbiano, Lorenzo

    Compositional Compilation for Java-like Languages through Polymorphic Bytecode extended version Dodecaneso, 35 16146 Genova, Italy zucca@disi.unige.it ABSTRACT We define compositional compilation compositional compilation is a highly desirable feature, in Java-like languages it can hardly be achieved

  3. Soft x-ray laser using pumping of 3p and 4p levels of He-like and H-like ions

    DOE Patents [OSTI]

    Hagelstein, P.L.

    1985-07-05

    X-ray laser method and apparatus for producing coherent radiation at, for example, energies of at least 40 eV, using Be-like Cr, N-like Ni, He-like Na, B-like Cr, Be-like Mn or similar multiply ionized species to pump appropriate high energy transitions in He-like or H-like N, O, F, C or rare gases, with associated laser transition gains of 4 to 50 cm/sup -1/.

  4. Soft X-ray laser using pumping of 3P and 4P levels of He-like and H-like ions

    DOE Patents [OSTI]

    Hagelstein, Peter L. (Livermore, CA)

    1987-01-01

    X-ray laser method and apparatus for producing coherent radiation at, for example, energies of at least 40 eV, using Be-like Cr, N-like Ni, He-like Na, B-like Cr, Be-like Mn or similar multiply ionized species to pump appropriate high energy transitions in He-like or H-like N, O, F, C or rare gases, with associated laser transition gains of 4-50 cm.sup.-1.

  5. New tools, like a flexible suturing device, have made endoscopically-

    E-Print Network [OSTI]

    Ford, James

    to freeze them in a technique called cryotherapy. She followed that a few weeks later with ra- diofrequency what would have happened if it hadn't been for that piece of meat get- ting stuck." Having a place like

  6. IDENTIFYING CURRENT-SHEET–LIKE STRUCTURES IN THE SOLAR WIND

    E-Print Network [OSTI]

    Li, Gang

    2008-01-01

    Barish, F. D. 1974, in Solar Wind Three, ed. C. T. Russell (in AIP Conf. Proc. 471, Solar Wind Nine, ed. S. R. Habbal (SHEET–LIKE STRUCTURES IN THE SOLAR WIND G. Li Space Science

  7. Ricotta's Recipe for Success... Entrepreneurs can be measured like

    E-Print Network [OSTI]

    Salvaggio, Carl

    1 Ricotta's Recipe for Success... Entrepreneurs can be measured like a recipe for success. Take with pride, passion and perseverance. Boil the recipe down and you have the essence of an entrepreneur: fully

  8. Paraneoplastic plaque-like cutaneous mucinosis: a case report

    E-Print Network [OSTI]

    Owen, Joshua L; Word, Andrew P; Vandergriff, Travis; Desai, Seemal R

    2015-01-01

    like cutaneous mucinosis: a case report Joshua L. Owen, BS,have an associated malignancy. We report a 72-year-old mancutaneous mucinosis: case report and literature review. Am J

  9. Life-Like Characters. Tools, Affective Functions, and Applications 

    E-Print Network [OSTI]

    Kawamoto, Shin ichi; Shimodaira, Hiroshi; Nitta, Tsuneo; Nishimoto, Takuya; Nakamura, Satoshi; Itou, Katsunobu; Morishima, Shigeo; Yotsukura, Tatsuo; Kai, Atsuhiko; Lee, Akinobu; Yamashita, Yoichi; Kobayashi, Takao; Tokuda, Keiichi; Hirose, Keikichi; Minematsu, Nobuaki; Yamada, Atsushi; Den, Yasuharu; Utsuro, Takehito; Sagayama, Shigeki

    2003-01-01

    Galatea is a software toolkit to develop a human-like spoken dialog agent. In order to easily integrate the modules of different characteristics including speech recognizer, speech synthesizer, facial animation synthesizer[ ...

  10. Analysis of a New Variational Model to Restore Point-Like and Curve-Like Singularities in Imaging

    SciTech Connect (OSTI)

    Aubert, Gilles; Blanc-Feraud, Laure Graziani, Daniele

    2013-02-15

    The paper is concerned with the analysis of a new variational model to restore point-like and curve-like singularities in biological images. To this aim we investigate the variational properties of a suitable energy which governs these pathologies. Finally in order to realize numerical experiments we minimize, in the discrete setting, a regularized version of this functional by fast descent gradient scheme.

  11. Plasma deposited diamond-like carbon films for large neutralarrays

    SciTech Connect (OSTI)

    Brown, I.G.; Blakely, E.A.; Bjornstad, K.A.; Galvin, J.E.; Monteiro, O.R.; Sangyuenyongpipat, S.

    2004-07-15

    To understand how large systems of neurons communicate, we need to develop methods for growing patterned networks of large numbers of neurons. We have found that diamond-like carbon thin films formed by energetic deposition from a filtered vacuum arc carbon plasma can serve as ''neuron friendly'' substrates for the growth of large neural arrays. Lithographic masks can be used to form patterns of diamond-like carbon, and regions of selective neuronal attachment can form patterned neural arrays. In the work described here, we used glass microscope slides as substrates on which diamond-like carbon was deposited. PC-12 rat neurons were then cultured on the treated substrates and cell growth monitored. Neuron growth showed excellent contrast, with prolific growth on the treated surfaces and very low growth on the untreated surfaces. Here we describe the vacuum arc plasma deposition technique employed, and summarize results demonstrating that the approach can be used to form large patterns of neurons.

  12. A unified Fano-like interference picture for charmonium-like states $Y(4008)$, $Y(4260)$ and $Y(4360)$

    E-Print Network [OSTI]

    Chen, Dian-Yong; Li, Xue-Qian; Ke, Hong-Wei

    2015-01-01

    We propose that the unified Fano-like interference picture applies to $e^+e^-\\to \\pi^+\\pi^- J/\\psi$ and $e^+e^-\\to \\pi^+\\pi^- \\psi(3686)$, where $Y(4260)$ and $Y(4360)$ are observed, respectively, to provide a reasonable interpretation of the asymmetric lineshapes of $Y(4260)$ and $Y(4360)$ structures. Moreover, the Fano-like interference induces an extra broad structure $Y(4008)$ in $e^+e^-\\to \\pi^+\\pi^- J/\\psi$ as a companion peak to $Y(4260)$. Three charmonium-like states $Y(4008)$, $Y(4260)$ and $Y(4360)$ observed in $e^+e^-$ annihilation processes are not genuine resonances. Under this scenario, it is well explained why $Y(4008)$, $Y(4260)$ and $Y(4360)$ are absent in the experimental data of the $R$ value scan and missing in open-charm decay channels. Although the present work presents the a typical application of the Fano-like interference in the particle physics at the lower energy region, we have reason to believe that the Fano-like phenomena may exist in other processes such as $e^+e^-\\to \\pi^+\\pi^-...

  13. Three-Dimensional Doppler Images of the Disk-like and Stream-like States of U Coronae Borealis

    E-Print Network [OSTI]

    Michail Agafonov; Olga Sharova; Mercedes Richards

    2008-05-07

    The 3D Radioastronomical Approach to Doppler tomography has been used to study the H$\\alpha$ emission sources in U Coronae Borealis. These 3D tomograms provide greater resolution than the projected 2D version and highlight the jet-like gas flows in the $V_z$ direction transverse to the orbital plane. In this paper, the 3D tomograms are compared at two distinct epochs when U CrB was in the disk-like state (1993 data) and the stream-like state (1994 data). Both states display a prominent emission source, the circumprimary bulge, which is produced when the gas stream strikes the photosphere of the mass-gainer. This source is detected within $V_z$ = $\\pm$150 km s{$^{-1}$}, and demonstrates that the bulge is not confined to the orbital plane although it achieves maximum strength near $V_z$=0 km s{$^{-1}$}. Other emission sources include the stream-star and stream-disk shocks and a Localized Region (LR) where the circling disk material strikes the incoming gas stream. The LR has $V_z$ velocities of 200 to 500 km s{$^{-1}$} in the disk-like state. The disk emission is seen over a range of $V_z$ velocities, and there is evidence that the disk is inclined to the orbital plane or may have two arms. The gas stream flows along its predicted trajectory in the stream-like state, and a comparison with the disk-like state suggests that the gas stream has a higher density than the disk in both states of this binary.

  14. Lubricants under high local pressure: Liquids act like solids

    E-Print Network [OSTI]

    Mueser, Martin

    Lubricants under high local pressure: Liquids act like solids Schmierstoffe unter hohem lokalem Druck: Flu¨ ssigkeiten verhalten sich wie Fest- stoffe M. H. Mu¨ ser A lubricant layer solidifies when confining surfaces slide past each other induces flow in the lubricant layer that is akin of plastic flow

  15. Atmospheric Chemistry of Venus-like Exoplanets Laura Schaefer

    E-Print Network [OSTI]

    - 1 - Atmospheric Chemistry of Venus-like Exoplanets by Laura Schaefer and Bruce Fegley, Jr thermodynamic calculations to model atmospheric chemistry on terrestrial exoplanets that are hot enough for chemical equilibria between the atmosphere and lithosphere, as on Venus. The results of our calculations

  16. When Mice Consume Like Elephants: Instant Messaging Applications

    E-Print Network [OSTI]

    , which leads to high energy consumption. The exchange of a couple of text messages can consume as muchWhen Mice Consume Like Elephants: Instant Messaging Applications Ekhiotz Jon Vergara, Simon in the usage of instant messaging (IM) appli- cations on mobile devices has brought the energy efficiency

  17. Vibration dissipation mount for motors or the like

    DOE Patents [OSTI]

    Small, Thomas R. (Brookeville, MD)

    1987-01-01

    A vibration dissipation mount which permits the mounting of a motor, generator, or the like such that the rotatable shaft thereof passes through the mount and the mount permits the dissipation of self-induced and otherwise induced vibrations wherein the mount comprises a pair of plates having complementary concave and convex surfaces, a semi-resilient material being disposed therebetween.

  18. Creating Works-Like Prototypes of Mechanical Objects Bongjin Koo

    E-Print Network [OSTI]

    O'Brien, James F.

    of creating works-like prototypes. Designers are increasingly turning to 3D printing as a tool for fab Graphics]: Computational Ge- ometry and Object Modeling--Geometric algorithms. Keywords: fabrication, 3D printing, sketch-based modeling Links: DL PDF WEB VIDEO 1 Introduction Creating physical prototypes

  19. Nonlinear dynamics of a system of particle-like wavepackets

    E-Print Network [OSTI]

    A. Babin; A. Figotin

    2007-08-13

    This work continues our studies of nonlinear evolution of a system of wavepackets. We study a wave propagation governed by a nonlinear system of hyperbolic PDE's with constant coefficients with the initial data being a multi-wavepacket. By definition a general wavepacket has a well defined principal wave vector, and, as we proved in previous works, the nonlinear dynamics preserves systems of wavepackets and their principal wave vectors. Here we study the nonlinear evolution of a special class of wavepackets, namely particle-like wavepackets. A particle-like wavepacket is of a dual nature: on one hand, it is a wave with a well defined principal wave vector, on the other hand, it a particle in the sense that it can be assigned a well defined position in the space. We prove that under the nonlinear evolution a generic multi-particle wavepacket remains to be a multi-particle wavepacket with a high accuracy, and every constituting single particle-like wavepacket not only preserves its principal wave number but also it has a well-defined space position evolving with a constant velocity which is its group velocity. Remarkably the described properties hold though the involved single particle-like wavepackets undergo nonlinear interactions and multiple collisions in the space. We also prove that if principal wavevectors of multi-particle wavepacket are generic, the result of nonlinear interactions between different wavepackets is small and the approximate linear superposition principle holds uniformly with respect to the initial spatial positions of wavepackets.

  20. What Should Blog Search Look Like? Marti A. Hearst

    E-Print Network [OSTI]

    Dumais, Susan

    What Should Blog Search Look Like? Marti A. Hearst School of Information UC Berkeley Berkeley, CA@microsoft.com Susan T. Dumais Microsoft Research Redmond, WA, 98052 sdumais@microsoft.com ABSTRACT Blog search has- commodate the task of finding good blogs to read, especially with respect to matching a desired taste

  1. IMMEDIATE COMMUNICATION Air pollution impairs cognition, provokes depressive-like

    E-Print Network [OSTI]

    Nelson, Randy J.

    IMMEDIATE COMMUNICATION Air pollution impairs cognition, provokes depressive-like behaviors Institute, The Ohio State University, Columbus, OH, USA Particulate matter air pollution is a pervasive the effects of prolonged exposure to air pollution are well characterized with respect to pulmonary

  2. Yang-Mills like instantons in eight and seven dimensions

    E-Print Network [OSTI]

    E. K. Loginov; E. D. Loginova

    2014-10-10

    We consider a gauge theory in which a nonassociative Moufang loop takes the place of a structure group. We construct Belavin-Polyakov-Schwartz-Tyupkin (BPST) and t'Hooft like instanton solutions of the gauge theory in seven and eight dimensions.

  3. EVALUATION AND DESIGN OF PROCESSOR-LIKE RECONFIGURABLE ARCHITECTURES

    E-Print Network [OSTI]

    Ould Ahmedou, Mohameden

    of recon- figurable architectures is the Totem project [2]. The explo- ration is based on compiled netlists dissipation are estimated using such commercial tools. 3. ARCHITECTURE DESIGN To evaluate differentEVALUATION AND DESIGN OF PROCESSOR-LIKE RECONFIGURABLE ARCHITECTURES Tobias Oppold Department

  4. Alternative Experimental Protocol for a PBR-Like Result

    E-Print Network [OSTI]

    D. J. Miller

    2012-02-29

    Pusey, Barrett and Rudolph (PBR) have recently proven an important new theorem in the foundations of quantum mechanics. Here we propose alternative experimental protocols which lead to the PBR result for a special case and a weaker PBR-like result generally. Alternative experimental protocols support the assumption of measurement independence required for the PBR theorem.

  5. Interactive Animation of Cloth-like Objects in Virtual Reality

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Interactive Animation of Cloth-like Objects in Virtual Reality Mark Meyer Caltech Gilles Debunne iMAGIS/IMAG Mathieu Desbrun USC/Caltech Alan H. Barr Caltech Abstract Modeling and animation of cloth has experienced to realistically drape objects or human characters in a fairly efficient way. However, real-time realistic

  6. Wireless Antennas -Making Wireless Communications Perform Like Wireline Communications

    E-Print Network [OSTI]

    Hua, Yingbo

    1 Wireless Antennas - Making Wireless Communications Perform Like Wireline Communications Yingbo first provide an overview of some of the latest developments in wireless communications using multiple of wireless antennas or wireless relays that are distributed between a source and a destination. We propose

  7. Intercalation of paracetamol into the hydrotalcite-like host

    SciTech Connect (OSTI)

    Kovanda, Frantisek, E-mail: Frantisek.Kovanda@vscht.cz [Department of Solid State Chemistry, Institute of Chemical Technology, Prague, Technicka 5, 166 28 Prague (Czech Republic); Maryskova, Zuzana [Department of Solid State Chemistry, Institute of Chemical Technology, Prague, Technicka 5, 166 28 Prague (Czech Republic); Kovar, Petr [Charles University in Prague, Faculty of Mathematics and Physics, Ke Karlovu 3, 121 16 Prague (Czech Republic)

    2011-12-15

    Hydrotalcite-like compounds are often used as host structures for intercalation of various anionic species. The product intercalated with the nonionic, water-soluble pharmaceuticals paracetamol, N-(4-hydroxyphenyl)acetamide, was prepared by rehydration of the Mg-Al mixed oxide obtained by calcination of hydrotalcite-like precursor at 500 Degree-Sign C. The successful intercalation of paracetamol molecules into the interlayer space was confirmed by powder X-ray diffraction and infrared spectroscopy measurements. Molecular simulations showed that the phenolic hydroxyl groups of paracetamol interact with hydroxide sheets of the host via the hydroxyl groups of the positively charged sites of Al-containing octahedra; the interlayer water molecules are located mostly near the hydroxide sheets. The arrangement of paracetamol molecules in the interlayer is rather disordered and interactions between neighboring molecules cause their tilting towards the hydroxide sheets. Dissolution tests in various media showed slower release of paracetamol intercalated in the hydrotalcite-like host in comparison with tablets containing the powdered pharmaceuticals. - Graphical abstract: Molecular simulations showed disordered arrangement of paracetamol molecules in the interlayer; most of the interlayer water molecules are located near the hydroxide sheets. Black-Small-Square Highlights: Black-Right-Pointing-Pointer Paracetamol was intercalated in Mg-Al hydrotalcite-like host by rehydration/reconstruction procedure. Black-Right-Pointing-Pointer Paracetamol phenolic groups interact with positively charged sites in hydroxide sheets. Black-Right-Pointing-Pointer Molecular simulations showed disordered arrangement of guest molecules in the interlayer. Black-Right-Pointing-Pointer Slower release of paracetamol intercalated in the hydrotalcite-like host was observed.

  8. Soft X-ray laser using pumping of 3P and 4P levels of He-like and H-like ions

    DOE Patents [OSTI]

    Hagelstein, P.L.

    1987-04-21

    X-ray laser method and apparatus are disclosed for producing coherent radiation at, for example, energies of at least 40 eV, using Be-like Cr, N-like Ni, He-like Na, B-like Cr, Be-like Mn or similar multiply ionized species to pump appropriate high energy transitions in He-like or H-like N, O, F, C or rare gases, with associated laser transition gains of 4-50 cm[sup [minus]1]. 8 figs.

  9. Soft x-ray laser using pumping of 3P and 4P levels of He-like and H-like ions

    DOE Patents [OSTI]

    Hagelstein, P.

    1982-03-26

    X-ray laser method and apparatus for producing coherent radiation at, for example, energies of 40 to 189 eV, using Be-like Cr, N-like Ni, He-like Na, B-like Cr, Be-like Mn or similar multiply ionized species to pump appropriate high energy transitions in He-like or H-like rare gases or N, O, F, or C gases, with associated laser transition gains of 20 to 50 cm/sup -1/.

  10. Controlling Graphene Ultrafast Hot Carrier Response from Metal-like to Semiconductor-like by Electrostatic Gating

    E-Print Network [OSTI]

    Zettl, Alex

    with dry nitrogen during the measurement. Sample preparation We grow single layer graphene on copper foil1 Controlling Graphene Ultrafast Hot Carrier Response from Metal-like to Semiconductor electro-optic sampling.2 The focused THz beam at our graphene sample has a diameter of 1 mm. For optical

  11. Controlling Graphene Ultrafast Hot Carrier Response from Metal-like to Semiconductor-like by Electrostatic Gating

    E-Print Network [OSTI]

    Zettl, Alex

    1 Controlling Graphene Ultrafast Hot Carrier Response from Metal-like to Semiconductor electro-optic sampling.2 The focused THz beam at our graphene sample has a diameter of 1 mm. For optical between optical pump and THz probe. We use ion-gel gating to control the carrier concentration in graphene

  12. Controlling Graphene Ultrafast Hot Carrier Response from Metal-like to Semiconductor-like by Electrostatic Gating

    E-Print Network [OSTI]

    Wang, Feng

    Controlling Graphene Ultrafast Hot Carrier Response from Metal-like to Semiconductor neutral graphene but decreases in highly doped graphene. We show that this transition from semiconductor graphene upon optical excitation. We observe that the photoinduced terahertz absorption increases in charge

  13. The A-like matrices for a hypercube

    E-Print Network [OSTI]

    Miklavic, Stefko

    2010-01-01

    Let $D$ denote a positive integer and let $Q_D$ denote the graph of the $D$-dimensional hypercube. Let $X$ denote the vertex set of $Q_D$ and let $A \\in \\MX$ denote the adjacency matrix of $Q_D$. A matrix $B \\in \\MX$ is called $A$-{\\em like} whenever both (i) $BA = AB$; (ii) for all $x,y \\in X$ that are not equal or adjacent, the $(x,y)$-entry of $B$ is zero. Let $\\Al$ denote the subspace of $\\MX$ consisting of the $A$-like elements. We decompose $\\Al$ into the direct sum of its symmetric part and antisymmetric part. We give a basis for each part. The dimensions of the symmetric part and antisymmetric part are $D+1$ and ${D \\choose 2}$, respectively.

  14. Method for producing fluorinated diamond-like carbon films

    DOE Patents [OSTI]

    Hakovirta, Marko J.; Nastasi, Michael A.; Lee, Deok-Hyung; He, Xiao-Ming

    2003-06-03

    Fluorinated, diamond-like carbon (F-DLC) films are produced by a pulsed, glow-discharge plasma immersion ion processing procedure. The pulsed, glow-discharge plasma was generated at a pressure of 1 Pa from an acetylene (C.sub.2 H.sub.2) and hexafluoroethane (C.sub.2 F.sub.6) gas mixture, and the fluorinated, diamond-like carbon films were deposited on silicon <100>substrates. The film hardness and wear resistance were found to be strongly dependent on the fluorine content incorporated into the coatings. The hardness of the F-DLC films was found to decrease considerably when the fluorine content in the coatings reached about 20%. The contact angle of water on the F-DLC coatings was found to increase with increasing film fluorine content and to saturate at a level characteristic of polytetrafluoroethylene.

  15. Polarization mesurements of gamma ray bursts and axion like particles

    E-Print Network [OSTI]

    Andre Rubbia; Alexander Sakharov

    2008-09-03

    A polarized gamma ray emission spread over a sufficiently wide energy band from a strongly magnetized astrophysical object like gamma ray bursts (GRBs) offers an opportunity to test the hypothesis of axion like particles (ALPs). Based on evidences of polarized gamma ray emission detected in several gamma ray bursts we estimated the level of ALPs induced dichroism, which could take place in the magnetized fireball environment of a GRB. This allows to estimate the sensitivity of polarization measurements of GRBs to the ALP-photon coupling. This sensitivity $\\gag\\le 2.2\\cdot 10^{-11} {\\rm GeV^{-1}}$ calculated for the ALP mass $m_a=10^{-3}~{\\rm eV}$ and MeV energy spread of gamma ray emission is competitive with the sensitivity of CAST and becomes even stronger for lower ALPs masses.

  16. Volume Ignition via Time-like Detonation in Pellet Fusion

    E-Print Network [OSTI]

    Csernai, L P

    2015-01-01

    Relativistic fluid dynamics and the theory of relativistic detonation fronts are used to estimate the space-time dynamics of the burning of the D-T fuel in Laser driven pellet fusion experiments. The initial "High foot" heating of the fuel makes the compressed target transparent to radiation, and then a rapid ignition pulse can penetrate and heat up the whole target to supercritical temperatures in a short time, so that most of the interior of the target ignites almost simultaneously and instabilities will have no time to develop. In these relativistic, radiation dominated processes both the interior, time-like burning front and the surrounding space-like part of the front will be stable against Rayleigh-Taylor instabilities. To achieve this rapid, volume ignition the pulse heating up the target to supercritical temperature should provide the required energy in less than ~ 10 ps.

  17. Localization of water monomers inside ice-like clusters

    E-Print Network [OSTI]

    V. L. Golo; S. M. Pershin

    2012-04-04

    On the basis of the experimental data we suggest that water monomers could be trapped in channels running through ice-like clusters in water. Our argument relies on a simple model that describes the motion of a dipole particle inside a channel in the presence of an electric field with linear gradient. The model admits of both finite and infinite regimes of motion so that the finite one could correspond to the particle being confined to a channel.

  18. Finsler-like structures from Lorentz-breaking classical particles

    E-Print Network [OSTI]

    Neil Russell

    2015-01-11

    A method is presented for deducing classical point-particle Lagrange functions corresponding to a class of quartic dispersion relations. Applying this to particles violating Lorentz symmetry in the minimal Standard-Model Extension leads to a variety of novel lagrangians in flat spacetime. Morphisms in these classical systems are studied that echo invariance under field redefinitions in the quantized theory. The Lagrange functions found offer new possibilities for understanding Lorentz-breaking effects by exploring parallels with Finsler-like geometries.

  19. Prevalence of Earth-size Planets Orbiting Sun-like Stars

    E-Print Network [OSTI]

    Petigura, Erik Ardeshir

    2015-01-01

    of Earth-Size Planets Orbiting Sun-Like 4.1 PlanetEarth-size Planets Orbiting Sun- like Stars 5.1 The Best42kEarth-size Planets Orbiting Sun-like Stars By Erik Ardeshir

  20. Schwarzschild-like metric and a quantum vacuum

    E-Print Network [OSTI]

    P. R. Silva

    2013-02-01

    A quantum vacuum, represented by a viscous fluid, is added to the Einstein vacuum, surrounding a spherical distribution of mass. This gives as a solution, in spherical coordinates, a Schwarzschild-like metric. The plot of g00 and g11 components of the metric, as a function of the radial coordinate, display the same qualitative behavior as that of the Schwarzschild metric. However, the temperature of the event horizon is equal to the Hawking temperature multiplied by a factor of two, while the entropy is equal to half of the Bekenstein one.

  1. Nail-like targets for laser plasma interaction experiments

    SciTech Connect (OSTI)

    Pasley, J; Wei, M; Shipton, E; Chen, S; Ma, T; Beg, F N; Alexander, N; Stephens, R B; MacPhee, A G; Hey, D; Pape, S L; Patel, P; Mackinnon, A J; Key, M H; Offermann, D; Link, A; Chowdhury, E; Van-Woerkom, L D; Freeman, R R

    2007-12-18

    The interaction of ultra-high power picosecond laser pulses with solid targets is of interest both for benchmarking the results of hybrid particle in cell (PIC) codes and also for applications to re-entrant cone guided fast ignition. We describe the construction of novel targets in which copper/titanium wires are formed into 'nail-like' objects by a process of melting and micromachining, so that energy can be reliably coupled to a 24 {micro}m diameter wire. An extreme-ultraviolet image of the interaction of the Titan laser with such a target is shown.

  2. Thermodynamic $R$-diagrams reveal solid-like fluid states

    E-Print Network [OSTI]

    George Ruppeiner; Peter Mausbach; Helge-Otmar May

    2014-11-11

    We evaluate the thermodynamic curvature $R$ for fluid argon, hydrogen, carbon dioxide, and water. For these fluids, $R$ is mostly negative, but we also find significant regimes of positive $R$, which we interpret as indicating solid-like fluid properties. Regimes of positive $R$ are present in all four fluids at very high pressure. Water has, in addition, a narrow slab of positive $R$ in the stable liquid phase near its triple point. Also, water is the only fluid we found having $R$ decrease on cooling into the metastable liquid phase, consistent with a possible second critical point.

  3. Piezo-antiferromagnetic effect of sawtooth-like graphene nanoribbons

    SciTech Connect (OSTI)

    Zhao, Shangqian; Lu, Yan; Zhang, Yuchun; Lu, Wengang Liang, Wenjie

    2014-05-19

    A type of sawtooth-like graphene nanoribbon (SGNR) with piezo-antiferromagnetic effect is studied numerically. The ground state of the studied SGNR changes from nonmagnetic state to antiferromagnetic state with uniaxial strain. The changes of the spin-charge distributions during the stretching are investigated. The Hubbard model reveals that the hopping integrals between the ?-orbitals of the carbon atoms are responsible to the piezo-antiferromagnetic effect. The study sheds light on the application of graphene-based structures to nanosensors and spintronic devices.

  4. Method and apparatus for making diamond-like carbon films

    DOE Patents [OSTI]

    Pern, Fu-Jann (Golden, CO); Touryan, Kenell J. (Indian Hills, CO); Panosyan, Zhozef Retevos (Yerevan, AM); Gippius, Aleksey Alekseyevich (Moscow, RU)

    2008-12-02

    Ion-assisted plasma enhanced deposition of diamond-like carbon (DLC) films on the surface of photovoltaic solar cells is accomplished with a method and apparatus for controlling ion energy. The quality of DLC layers is fine-tuned by a properly biased system of special electrodes and by exact control of the feed gas mixture compositions. Uniform (with degree of non-uniformity of optical parameters less than 5%) large area (more than 110 cm.sup.2) DLC films with optical parameters varied within the given range and with stability against harmful effects of the environment are achieved.

  5. Y-12 apprentice programs are a lot like TAT

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLos Alamos verifies largest single and the history ofare a lot like TAT

  6. Lab employees don't treat their trash like garbage

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverseIMPACTThousand CubicResource andfirstDeviceLab captures fiveLab Employees

  7. Synthesis and characterization of akaganeite-like ferric oxyhydroxides

    SciTech Connect (OSTI)

    Linehan, J.C.; Darab, J.G.; Matson, D.W.; Chen, X.; Amonette, J.E. [Pacific Northwest National Lab., Richland, WA (United States)

    1997-08-01

    Iron-based powders have been used as catalytic and stoichiometric reactants in a variety of organic reactions and are receiving additional attention as ion exchange materials or once-through adsorbents for clean-up of toxic or radioactive waste streams. Recent efforts have been directed toward the design of iron-based products, in particular iron sulfides, capable of performing as hydrocracking catalysts for coal liquefaction and heavy crude or resid cracking. Here the authors present structural studies of new materials having akaganeite-like structures and of their use as hydrocracking catalyst precursors. Akaganeite, {beta}-FeOOH, a natural ferric oxyhydroxide mineral, has a structure containing tunnel-like cavities in which chloride ions reside. Analogs of akaganeite in which carbonate or sulfate groups replace the chloride ions have also been synthesized. Both akaganeite and its substituted analogs are known to be precursors for active hydrocracking catalysts. The authors present powder X-ray diffraction (XRD) and X-ray absorption fine-structure spectroscopy (XAFS) data confirming the synthesis of new ferric oxyhydroxides having structures similar to akaganeite, but contain molybdate and tungstate oxy-anions. They also present a new hydrothermal method to prepare this family of materials.

  8. A Skyrme-like model with an exact BPS bound

    E-Print Network [OSTI]

    L. A. Ferreira; Wojtek J. Zakrzewski

    2013-07-22

    We propose a new Skyrme-like model with fields taking values on the sphere S^3 or, equivalently, on the group SU(2). The action of the model contains a quadratic kinetic term plus a quartic term which is the same as that of the Skyrme-Faddeev model. The novelty of the model is that it possess a first order Bogomolny type equation whose solutions automatically satisfy the second order Euler-Lagrange equations. It also possesses a lower bound on the static energy which is saturated by the Bogomolny solutions. Such Bogomolny equation is equivalent to the so-called force free equation used in plasma and solar Physics, and which possesses large classes of solutions. An old result due to Chandrasekhar prevents the existence of finite energy solutions for the force free equation on the entire tridimensional space R^3. We construct new exact finite energy solutions to the Bogomolny equations for the case where the space is the three-sphere S^3, using toroidal like coordinates.

  9. DETECTABILITY OF EARTH-LIKE PLANETS IN CIRCUMSTELLAR HABITABLE ZONES OF BINARY STAR SYSTEMS WITH SUN-LIKE COMPONENTS

    SciTech Connect (OSTI)

    Eggl, Siegfried; Pilat-Lohinger, Elke; Haghighipour, Nader

    2013-02-20

    Given the considerable percentage of stars that are members of binaries or stellar multiples in the solar neighborhood, it is expected that many of these binaries host planets, possibly even habitable ones. The discovery of a terrestrial planet in the {alpha} Centauri system supports this notion. Due to the potentially strong gravitational interaction that an Earth-like planet may experience in such systems, classical approaches to determining habitable zones (HZ), especially in close S-type binary systems, can be rather inaccurate. Recent progress in this field, however, allows us to identify regions around the star permitting permanent habitability. While the discovery of {alpha} Cen Bb has shown that terrestrial planets can be detected in solar-type binary stars using current observational facilities, it remains to be shown whether this is also the case for Earth analogs in HZs. We provide analytical expressions for the maximum and rms values of radial velocity and astrometric signals, as well as transit probabilities of terrestrial planets in such systems, showing that the dynamical interaction of the second star with the planet may indeed facilitate the planets' detection. As an example, we discuss the detectability of additional Earth-like planets in the averaged, extended, and permanent HZs around both stars of the {alpha} Centauri system.

  10. Overlooked astrophysical signatures of axion(-like) particles

    E-Print Network [OSTI]

    Zioutas, K; Papaevangelou, T; Zioutas, Konstantin; Semertzidis, Yannis; Papaevangelou, Thomas

    2007-01-01

    The working principle of axion helioscopes can be behind unexpected solar X-ray emission, being associated with solar magnetic fields, which become the catalyst. Solar axion signals are transient brightenings, or, continuous radiation. We arrive at 2 exotica: a) trapped, radiatively decaying, massive axions and b) outstreaming light axions, explaining unpredictable transient solar phenomena. Then, the energy of a related phenomenon points at the birth place of the axions. The energy range below some 100 eV is a window of opportunity for direct axion searches. Indirect signatures support axions or the like as an explanation of enigmatic behaviour in the Sun and beyond. Axion antennas could take advantage of such a feed back.

  11. Optically transparent, scratch-resistant, diamond-like carbon coatings

    DOE Patents [OSTI]

    He, Xiao-Ming; Lee, Deok-Hyung; Nastasi, Michael A.; Walter, Kevin C.; Tuszewski, Michel G.

    2003-06-03

    A plasma-based method for the deposition of diamond-like carbon (DLC) coatings is described. The process uses a radio-frequency inductively coupled discharge to generate a plasma at relatively low gas pressures. The deposition process is environmentally friendly and scaleable to large areas, and components that have geometrically complicated surfaces can be processed. The method has been used to deposit adherent 100-400 nm thick DLC coatings on metals, glass, and polymers. These coatings are between three and four times harder than steel and are therefore scratch resistant, and transparent to visible light. Boron and silicon doping of the DLC coatings have produced coatings having improved optical properties and lower coating stress levels, but with slightly lower hardness.

  12. Ideal-Gas Like Markets An Exact Solution

    E-Print Network [OSTI]

    Mohanty, P K

    2006-01-01

    We provide an exact solution to the ideal gas like models studied in econophysics to understand the microscopic origin of Pareto-law. In these class of models the key ingredient necessary for having a self organized scale free steady state distribution is the trading/collision rule where agents/particles save a definite fraction of their wealth/energy and invests the rest for trading. Using Gibbs ensemble approach we could obtain the exact distribution of wealth in this model. Moreover we show that in this model (a) good savers are always rich and (b) every agent poor or rich invests the same amount for trading. Non-linear trading rules could alter the generic scenario observed here.

  13. OGY Control of Haken Like Systems on Different Poincare Sections

    E-Print Network [OSTI]

    Mozhgan Mombeini

    2012-06-05

    The Chua system, the Lorenz system, the Chen system and The L\\"u system are chaotic systems that their state space equations is very similar to Haken system which is a nonlinear model of a optical slow-fast system. These Haken-Like Sys-tems have very similar properties. All have two slow but unstable eigenvalues and one fastest but stable eigenvalue. This lets that an approximation of slow manifold be equivalent with unstable manifold of the system. In other hand, control of discreet model of the system on a defined manifold (Poincare map) is main essence of some important control methods of chaotic systems for example OGY method. Here, by using different methods of defining slow manifold of the H-L systems the efficiency of the OGY control for stabilizing problem investigated.

  14. Critical-like Features of Stress Response in Frictional Packings

    E-Print Network [OSTI]

    Abdullah Cakir; Leonardo E. Silbert

    2015-02-25

    The mechanical response of static, unconfined, overcompressed face centred cubic, granular arrays is studied using large-scale, discrete element method simulations. Specifically, the stress response due to the application of a localised force perturbation - the Green function technique - is obtained in granular packings generated over several orders of magnitude in both the particle friction coefficient and the applied forcing. We observe crossover behaviour in the mechanical state of the system characterised by the changing nature of the resulting stress response. The transition between anisotropic and isotropic stress response exhibits critical-like features through the identification of a diverging length scale that distinguishes the spatial extent of anisotropic regions from those that display isotropic behaviour. A multidimensional phase diagram is constructed that parameterises the response of the system due to changing friction and force perturbations.

  15. Dark photons in the decay of Higgs-like boson

    E-Print Network [OSTI]

    Kozlov, G A

    2015-01-01

    We study the dark matter particle, the dark photon (DP), in the decay of the Higgs-like boson. The nature of dark matter is maintained through the hidden sector including the effects of breaking of the scale invariance. The model is based on the additional $U^{\\prime}(1)$ gauge group associated with light DP. The interaction between DP and quarks is mediated by the derivative of the scalar - the dilaton. The latter appears in the conformal sector which triggers the electroweak symmetry breaking. Upper limits are set on the DP mass, the mixing strength between the standard photon and DP. The model does allow to estimate the DP mass with the value of 4.5 MeV. The maximal value of the scale invariance breaking constant is also reported.

  16. Likely social impacts of proposed national-level policy initiatives

    SciTech Connect (OSTI)

    Piernot, C.A.; Rothweiler, M.A.; Levine, A.; Crews, R.

    1981-03-01

    The results are described of an investigation of likely social effects of enacting nine proposed national-level policy initiatives to accelerate development and use of solar energy. This study is part of the Technology Assessment of Solar Energy Systems (TASE) project supported by the US Department of Energy. The report presents general social impact information about the variety of ways in which the American people could be affected by enactment of these initiatives. It identifies the effects of each initiative on individuals, groups, organizations, communities, and society as a whole. In addition, it provides a framework for organizing a myriad of impact information into a set of conceptually exclusive impact categories. It illustrates that social impacts means effects on people as individuals, groups, organizations, and communities as well as on the infrastructure of society. Finally, it demonstrates the importance of specifying an audience of impact with a case example from the residential rental market.

  17. Sources of mycosporine-like amino acids in planktonic Chlorella-bearing ciliates (Ciliophora)

    E-Print Network [OSTI]

    Sommaruga, Ruben

    -like amino acids, natural sunscreens, symbiosis Introduction Ciliates are among the most important members

  18. Tungsten dust impact on ITER-like plasma edge

    SciTech Connect (OSTI)

    Smirnov, R. D. Krasheninnikov, S. I.; Pigarov, A. Yu.; Rognlien, T. D.

    2015-01-15

    The impact of tungsten dust originating from divertor plates on the performance of edge plasma in ITER-like discharge is evaluated using computer modeling with the coupled dust-plasma transport code DUSTT-UEDGE. Different dust injection parameters, including dust size and mass injection rates, are surveyed. It is found that tungsten dust injection with rates as low as a few mg/s can lead to dangerously high tungsten impurity concentrations in the plasma core. Dust injections with rates of a few tens of mg/s are shown to have a significant effect on edge plasma parameters and dynamics in ITER scale tokamaks. The large impact of certain phenomena, such as dust shielding by an ablation cloud and the thermal force on tungsten ions, on dust/impurity transport in edge plasma and consequently on core tungsten contamination level is demonstrated. It is also found that high-Z impurities provided by dust can induce macroscopic self-sustained plasma oscillations in plasma edge leading to large temporal variations of edge plasma parameters and heat load to divertor target plates.

  19. Analysis of Star Formation in Galaxy-like Objects

    E-Print Network [OSTI]

    Patricia B. Tissera

    1999-12-20

    Using cosmological hydrodynamical simulations, we investigate the effects of hierarchical aggregation on the triggering of star formation in galactic-like objects. We include a simple star formation model to transform the cold gas in dense regions into stars. Simulations with different parameters have been performed in order to quantify the dependence of the results on the parameters. We then resort to stellar population synthesis models to trace the color evolution of each object with red-shift and in relation to their merger histories. We find that, in a hierarchical clustering scenario, the process of assembling of the structure is one natural mechanism that may trigger star formation. The resulting star formation rate history for each individual galactic object is composed of a continuous one ($\\leq 3 \\rm{M_{\\odot}/yr}$) and a series of star bursts. We find that even the accretion of a small satellite can be correlated with a stellar burst. Massive mergers are found to be more efficient at transforming gas into stars

  20. Energy Levels Of Hydrogen-Like Atomsand Fundamental Constants

    E-Print Network [OSTI]

    Valeri V. Dvoeglazov; Rudolf N. Faustov; Yuri N. Tyukhtyaev

    1994-03-27

    The present review includes the description of theoretical methods for the investigations of the spectra of hydrogen-like systems. Various versions of the quasipotential approach and the method of the effective Dirac equation are considered. The new methods, which have been developed in the eighties, are described. These are the method for the investigation of the spectra by means of the quasipotential equation with the relativistic reduced mass and the method for a selection of the logarithmic corrections by means of the renormalization group equation. The special attention is given to the construction of a perturbation theory and the selection of graphs, whereof the contributions of different orders of $\\alpha$, the fine structure constant, to the energy of the fine and hyperfine splitting in a positronium, a muonium and a hydrogen atom could be calculated. In the second part of this article the comparison of the experimental results and the theoretical results concerning the wide range of topics is produced. They are the fine and hyperfine splitting in the hydrogenic systems, the Lamb shift and the anomalous magnetic moments of an electron and a muon. Also, the problem of the precision determination of a numerical value of the fine structure constant, connected with the above topics, is discussed.

  1. High-frequency modes in solar-like stars

    E-Print Network [OSTI]

    C. Karoff

    2007-08-14

    p-mode oscillations in solar-like stars are excited by the outer convection zone in these stars and reflected close to the surface. The p-modes are trapped inside an acoustic cavity, but the modes only stay trapped up to a given frequency (known as the acoustic cut-off frequency) as modes with larger frequencies are generally not reflected at the surface. This means that modes with frequency larger than the acoustic cut-off frequency must be traveling waves. The high-frequency modes may provide information about the physics in the outer layers of the stars and the excitation source and are therefore highly interesting as it is the estimation of these two phenomena that causes some of the largest uncertainties when calculating stellar oscillations. High-frequency modes have been detected in the Sun, beta Hydri and in alpha Cen A & B by smoothing the so-called echelle diagram and the large frequency separation as a function of frequency have been estimated. The large frequency separation has been compared with a simple model of the acoustic cavity which suggests that the reflectivity of the photosphere is larger at high frequency than predicted by standard models of the solar atmosphere and that the depth of the excitation source is larger than what has been estimated by other models and might depend on the order n and degree l of the modes.

  2. PLANETESIMALS IN DEBRIS DISKS OF SUN-LIKE STARS

    SciTech Connect (OSTI)

    Shannon, Andrew; Wu Yanqin

    2011-09-20

    Observations of dusty debris disks can be used to test theories of planetesimal coagulation. Planetesimals of sizes up to a couple of thousand kilometers are embedded in these disks and their mutual collisions generate the small dust grains that are observed. The dust luminosities, when combined with information on the dust spatial extent and the system age, can be used to infer initial masses in the planetesimal belts. Carrying out such a procedure for a sample of debris disks around Sun-like stars, we reach the following two conclusions. First, if we assume that colliding planetesimals satisfy a primordial size spectrum of the form dn/ds{proportional_to}s{sup -q}, observed disks strongly favor a value of q between 3.5 and 4, while both current theoretical expectations and statistics of Kuiper belt objects favor a somewhat larger value. Second, number densities of planetesimals are two to three orders of magnitude higher in detected disks than in the Kuiper belt, for comparably sized objects. This is a surprise for the coagulation models. It would require a similar increase in the disk surface density over that of the Minimum Mass Solar Nebula, which is unreasonable. Both of our conclusions are driven by the need to explain the presence of bright debris disks at a few gigayears of age.

  3. Lithium abundance in a sample of solar-like stars

    E-Print Network [OSTI]

    López-Valdivia, R; Bertone, E; Chávez, M; de Miera, F Cruz-Saenz; Amazo-Gómez, E M

    2015-01-01

    We report on the determination of the lithium abundance [A(Li)] of 52 solar-like stars. For 41 objects the A(Li) here presented corresponds to the first measurement. We have measured the equivalent widths of the 6708\\AA\\ lithium feature in high-resolution spectroscopic images ($R \\sim 80\\,000$), obtained at the Observatorio Astrof\\'isico Guillermo Haro (Sonora, Mexico), as part of the first scientific observations of the revitalized Lunar and Planetary Laboratory (LPL) Echelle Spectrograph, now known as the Cananea High-resolution Spectrograph (CanHiS). Lithium abundances were derived with the Fortran code MOOG, using as fundamental input a set of atmospheric parameters recently obtained by our group. With the help of an additional small sample with previous A(Li) determinations, we demonstrate that our lithium abundances are in agreement, to within uncertainties, with other works. Two target objects stand out from the rest of the sample. The star BD+47 3218 ($T_{\\rm eff}$ = 6050$\\pm$52 K, A(Li) = 1.86$\\pm$ 0...

  4. Jets and Jet-like correlations in STAR

    E-Print Network [OSTI]

    Alice Ohlson; for the STAR Collaboration

    2012-10-08

    The propagation and modification of hard-scattered partons in the QGP can be studied using various types of jet and jet-like correlation measurements. The STAR detector with its full azimuthal and large pseudorapidity acceptance, as well as its wide transverse momentum (pT) coverage, is well-suited for these measurements. At mid-rapidity, azimuthal correlations of charged hadrons with the axis of a reconstructed trigger jet are used to study the modification of jet shapes and associated hadron yields from p+p to Au+Au. Dihadron correlations with back-to-back high-pT hadron pairs are used to investigate dijets and fragmentation biases. STAR's increased particle identification capabilities due to the Time-Of-Flight detector are utilized to investigate the differences between jet-related and bulk-related particle production. Dihadron correlations with identified trigger particles provide experimental tests of simple recombination theories. The comprehensive set of STAR jet-quenching measurements can be used to further constrain theories of parton energy loss at RHIC.

  5. Genuine Correlations of LikeSign Particles in Hadronic Z 0 Decays

    E-Print Network [OSTI]

    driven by that of like­ sign multiplets. This points to the likely influence of Bose­Einstein correlations. Some of the recently proposed algorithms to simulate Bose­Einstein e#ects, implemented

  6. "I'd Like to Check Out Two Books, One DVD, and One Electrical...

    Energy Savers [EERE]

    "I'd Like to Check Out Two Books, One DVD, and One Electrical Meter, Please." "I'd Like to Check Out Two Books, One DVD, and One Electrical Meter, Please." December 8, 2009 -...

  7. Automatic deployment of autonomous cars in a robotic urban-like environment (RULE)

    E-Print Network [OSTI]

    Itani, Sara T.

    We present a computational framework and experimental setup for deployment of autonomous cars in a miniature Robotic Urban-Like Environment (RULE). The specifications are given in rich, human-like language as temporal logic ...

  8. The role of the NOD-like receptor adaptor RIP2 in otitis media

    E-Print Network [OSTI]

    Lee, Jasmine

    2011-01-01

    SAN DIEGO The Role of the NOD-like Receptor Adaptor RIP2 inmolecular pattern interleukin NOD-like receptor non-typeable1. A schematic representation of NOD signaling via the RIP2

  9. Heavy standard model-like Higgs boson and a light stop fromYukawa...

    Office of Scientific and Technical Information (OSTI)

    Journal Article: Heavy standard model-like Higgs boson and a light stop from Yukawa-deflected gauge mediation Citation Details In-Document Search Title: Heavy standard model-like...

  10. A NOTE ON SPIRAL-LIKE POLYNOMIALS ALAN GLUCHOFF AND FREDERICK HARTMANN

    E-Print Network [OSTI]

    Hartmann, Frederick

    A NOTE ON SPIRAL-LIKE POLYNOMIALS ALAN GLUCHOFF AND FREDERICK HARTMANN Abstract. Let D be the unit. Univalent functions, spiral-like poynomials, starlike. 1 #12;2 ALAN GLUCHOFF AND FREDERICK HARTMANN class

  11. Composition of Dioxin-like PCBs in Fish: An Application for Risk

    E-Print Network [OSTI]

    Jackson, Don

    Composition of Dioxin-like PCBs in Fish: An Application for Risk Assessment S A T Y E N D R A P . B in Aroclors and that toxicity varies considerably among the congeners with dioxin-like PCBs (dl

  12. Forecasting the Most Likely Status of Wild Salmon in the California Central Valley in 2100

    E-Print Network [OSTI]

    Franks, Sierra E.; Lackey, Robert T.

    2015-01-01

    at things like efficient water use, energy efficiency, andto use the highest energy and water efficiency measures

  13. Water-like solvation thermodynamics in a spherically symmetric solvent model

    E-Print Network [OSTI]

    Buldyrev, Sergey

    Water-like solvation thermodynamics in a spherically symmetric solvent model with two. The Jagla fluid has been recently shown to possess water-like structural, dynamic, and thermodynamic and thereby show that the Jagla fluid also displays water-like solvation thermodynamics. We further find low

  14. Finding IRC-like Meshes Sans Layer 7 Payloads Computer Science Dept.

    E-Print Network [OSTI]

    Binkley, Jim

    Finding IRC-like Meshes Sans Layer 7 Payloads Akshay Dua Computer Science Dept. Portland State Portland, OR, USA singh@cs.pdx.edu Abstract We present an algorithm for detecting IRC-like chat net- works of scanning hosts. We are currently able to dis- cover SSL-encoded IRC meshes as well as other chat- like

  15. Self-assembly of 21-arm star-like diblock copolymer in bulk and under cylindrical

    E-Print Network [OSTI]

    Lin, Zhiqun

    Self-assembly of 21-arm star-like diblock copolymer in bulk and under cylindrical confinement Yuci Xu,ab Weihua Li,*c Feng Qiuc and Zhiqun Lin*b Phase behaviors of a 21-arm star-like diblock copolymer the period of lamellae Dmultiarms formed from multi- arm star-like block copolymers with the number of arms f

  16. Jacobi-like Method for a Control Algorithm in Adaptive-Optics Imaging

    E-Print Network [OSTI]

    Pitsianis, Nikos P.

    Jacobi-like Method for a Control Algorithm in Adaptive-Optics Imaging Nikos P. Pitsianis', Brent L difficult and is approached using a heuristic Jacobi-like algorithm. Numerical tests indicate purpose here is to extend the mathematical theory behind a Jacobi-like heuristic optimization scheme

  17. Lyapunov-Like Conditions for the Existence of Zeno Behavior in Hybrid and Lagrangian Hybrid Systems

    E-Print Network [OSTI]

    Ames, Aaron

    Lyapunov-Like Conditions for the Existence of Zeno Behavior in Hybrid and Lagrangian Hybrid Systems Andrew Lamperski and Aaron D. Ames Abstract-- Lyapunov-like conditions that utilize generaliza- tions configuration space, we utilize our Lyapunov-like conditions to obtain easily verifiable necessary

  18. Polarization and Pressure-Dependence of 2p-1s Transitions in He-Like and Li-Like Neon Recoil Ions 

    E-Print Network [OSTI]

    Watson, R. L.; Palinkas, J.; Pedrazzini, G. J.; Bandong, B.; Can, C.; Church, David A.; Kenefick, R. A.

    1987-01-01

    VOLUME 35, NUMBER 4 FEBRUARY 15, 1987 Polarization and pressure dependence of 2p-1s transitions in He-like and Li-like neon recoil ions R. L. Watson, J. Palinkas, * G. J. Pedrazzini, B. Bandong, and C. Can Cyclotron Institute and Department... of Chemistry, Texas A&M University, College Station, Texas 77843 D. A. Church and R. A. Kenefick Department of Physics, Texas A&M University, College Station, Texas 77843 (Received 1 August 1986) The pressure dependences of 2p-1s transitions in H~- like...

  19. Survey of vector-like fermion extensions of the Standard Model and their phenomenological implications

    E-Print Network [OSTI]

    Ellis, Sebastian A R; Gopalakrishna, Shrihari; Wells, James D

    2014-01-01

    With the renewed interest in vector-like fermion extensions of the Standard Model, we present here a study of multiple vector-like theories and their phenomenological implications. Our focus is mostly on minimal flavor conserving theories that couple the vector-like fermions to the SM gauge fields and mix only weakly with SM fermions so as to avoid flavor problems. We present calculations for precision electroweak and vector-like state decays, which are needed to investigate compatibility with currently known data. We investigate the impact of vector-like fermions on Higgs boson production and decay, including loop contributions, in a wide variety of vector-like extensions and their parameter spaces.

  20. The GammeV suite of experimental searches for axion-like particles

    SciTech Connect (OSTI)

    Steffen, Jason H.; Upadhye, Amol; /KICP, Chicago /Chicago U., EFI

    2009-08-01

    We report on the design and results of the GammeV search for axion-like particles and for chameleon particles. We also discuss plans for an improved experiment to search for chameleon particles, one which is sensitive to both cosmological and power-law chameleon models. Plans for an improved axion-like particle search using coupled resonant cavities are also presented. This experiment will be more sensitive to axion-like particles than stellar astrophysical models or current helioscope experiments.

  1. Sustainability E-Newsletter Fall/Winter 2013-2014 Like "Office of

    E-Print Network [OSTI]

    Alpay, S. Pamir

    Sustainability E-Newsletter Fall/Winter 2013-2014 Like "Office of Environmental Policy" on FacebookDay..........................................................................................2 Campus Sustainability Day our Sustainability Coordinators......................................................6 Campus

  2. Possible Diamond-Like Nanoscale Structures Induced by Slow Highly-Charged Ions on Graphite (HOPG)

    E-Print Network [OSTI]

    Sideras-Haddad, E.

    2009-01-01

    diamond-like structures (nanodiamond) observed using Ramandefect centres 21 in a nanodiamond matrix. II. Experimentallike structures (nanodiamond). Here the surface treatment

  3. Sandia Energy - Sandia-Developed LED Pulser Delivers Laser-Like...

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

    Sandia-Developed LED Pulser Delivers Laser-Like Performance at Fraction of the Cost Home Energy CRF Facilities Capabilities News News & Events Research & Capabilities Systems...

  4. Kaolin in the net-like horizon of laterite in Hubei, south China

    E-Print Network [OSTI]

    Li, Zhaohui

    , halloysite, goethite and minor illite, whereas the white net-like veins contain mostly quartz, kaolinite, whereas yellow spots contain concentrations of kaolinite and goethite (Ambrosi & Nahon, 1986

  5. Facet-like Structures in Computer Science Napier University, School of Computing,

    E-Print Network [OSTI]

    Priss, Uta

    -like structures are used in computer science. 10 years ago the notion of "facets" was mainly restricted to libraryFacet-like Structures in Computer Science Uta Priss Napier University, School of Computing, u on a mathematical model for facets (and class hierarchies in general), called formal concept analysis, and discusses

  6. Defining the Origins of the NOD-Like Receptor System at the Base of Animal Evolution

    E-Print Network [OSTI]

    Defining the Origins of the NOD-Like Receptor System at the Base of Animal Evolution Christina mechanisms at the base of animal evolution. Key words: Hydra, innate immunity, epithelial defense, NOD and oligomerisation domain-like receptors (NLRs) or NODs. Vertebrate NLR genes encode regulatory cytosolic proteins

  7. ``Plate-like'' subsidence of the East Pacific RiseSouth Pacific superswell system

    E-Print Network [OSTI]

    Watts, A. B. "Tony"

    ``Plate-like'' subsidence of the East Pacific Rise­­South Pacific superswell system J. K. Hillier significantly, the superswell appears to be part of a large-scale, ``plate-like,'' subsidence that extends to the EPR crest, rather than an isolated shallowing that reverses the subsidence and causes uplift. We

  8. Atmospheric plasma deposition of diamond-like carbon coatings Angela M. Ladwig a,b,

    E-Print Network [OSTI]

    Hicks, Robert F.

    include ion beam deposition, cathodic arc spray, pulsed laser ablation, argon ion sputtering, and plasmaAtmospheric plasma deposition of diamond-like carbon coatings Angela M. Ladwig a,b, , Ronald D Available online xxxx Keywords: Atmospheric pressure plasma Diamond-like carbon deposition DLC PECVD

  9. Expert: This GOP primary 'like ultimate fighting'; Will it leave general election wounds?

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Expert: This GOP primary 'like ultimate fighting'; Will it leave general election wounds? By JOHN says. "It's more like ultimate fighting. There are no gentlemen's rules." #12;But "gentleman's rules to Obama. In 1976, Ronald Reagan took his fight against then-President Gerald Ford to the convention

  10. Diffusion within a Layered, Graphite-Like, Spherical Electrode Theoretical Aspects

    E-Print Network [OSTI]

    Taylor, Philip L.

    Diffusion within a Layered, Graphite-Like, Spherical Electrode Theoretical Aspects Paul B. Antohi. Within this model, which mimics a layered, graphite-like spherical electrode, species can enter or leave further performance optimization of Li+ batteries have generated renewed interest into experimental

  11. IEEE INFOCOM 2001 Behavior of TCP-like elastic traffic at a buffered

    E-Print Network [OSTI]

    Schwefel, Hans-Peter

    IEEE INFOCOM 2001 Behavior of TCP-like elastic traffic at a buffered bottleneck router Hans by a stochastic process. The essential behavior of TCP-like flow-control mechanisms is captured in the analytic to existing congestion, the throttling mechanism is only activated when the buffer-occupancy at the bottleneck

  12. Engineering a Recyclable Elastin-like Polypeptide Capturing Scaffold for Non-Chromatographic Protein Purification

    E-Print Network [OSTI]

    Chen, Wilfred

    Engineering a Recyclable Elastin-like Polypeptide Capturing Scaffold for Non- Chromatographic and the reversible aggregation property of elastin-like polypeptide (ELP) to pro- vide fast and cost reduce the purifica- tion cost by recycling the ELP capturing scaffold, a truncated dockerin domain

  13. NEUTRON LIFETIME EXPERIMENT USING UCN STORAGE IN AN `ACCORDION-LIKE' TRAP

    E-Print Network [OSTI]

    Steyerl, Albert

    NEUTRON LIFETIME EXPERIMENT USING UCN STORAGE IN AN `ACCORDION-LIKE' TRAP BY ASHISH M. DESAI determination of the neutron lifetime has an impact on particle physics and cosmology. We report progress towards a measurement of the neutron lifetime using an accordion-like storage trap. Ultracold neutrons

  14. Use of seal-like robot PARO in sensory group therapy for older adults with dementia

    E-Print Network [OSTI]

    Sabanovic, Selma

    Use of seal-like robot PARO in sensory group therapy for older adults with dementia Wan-Ling Chang--This work presents the preliminary results of an eight- week study of the seal-like robot PARO being used adapted the concept of MSBT to the use of PARO as a multimodal sensory stimulus in a group activity

  15. Electronic structure of the Si(111):GaSe van der Waals-like surface termination

    E-Print Network [OSTI]

    Olmstead, Marjorie

    Electronic structure of the Si(111):GaSe van der Waals-like surface termination Reiner Rudolph-like surface termination has been determined by angle-resolved photoelectron spectroscopy using photons. This explains both the absence of a surface core-level shift in Si 2p photoelectron spectra of the terminated

  16. Multigrid-like Technique for Power Grid Analysis Joseph N. Kozhaya

    E-Print Network [OSTI]

    Najm, Farid N.

    Multigrid-like Technique for Power Grid Analysis Joseph N. Kozhaya University of Illinois, Urbana-micron VLSI designs include huge power grids that are required to distribute large amounts of current, at in a novel multigrid-like technique for the analysis of power grids. The grid is reduced to a coarser

  17. COMMUNICATIONS Deposition of aligned bamboo-like carbon nanotubes via microwave

    E-Print Network [OSTI]

    of carbon nanotubes on nickel,11 but twist-like defects also exist along carbon nano- tubes. The abilityCOMMUNICATIONS Deposition of aligned bamboo-like carbon nanotubes via microwave plasma enhanced for publication 31 August 2000 Aligned multiwall carbon nanotubes have been grown on silicon substrates

  18. Extending a C-like Language for Portable SIMD Programming Roland Leia Sebastian Hack

    E-Print Network [OSTI]

    Wald, Ingo

    Extending a C-like Language for Portable SIMD Programming Roland Leißa Sebastian Hack Compiler. However, automatic vector- ization techniques are often not powerful enough and suffer from restricted. In this paper, we show how a C-like language can be extended to allow for portable and efficient SIMD

  19. A Privacy Preservation Model for Facebook-like Social Network Systems

    E-Print Network [OSTI]

    Regina, University of

    A Privacy Preservation Model for Facebook-like Social Network Systems Philip W. L. Fong, Mohd Anwar-0-7731-0659 (print) ISBN 978-0-7731-0660 (online) #12;A Privacy Preservation Model for Facebook-Like Social Network growth in the popularity of social network systems, with Facebook being an archetypical example. Due

  20. Mar 24th 2011 | from the print edition 0 40Like Battery technology

    E-Print Network [OSTI]

    Braun, Paul

    Mar 24th 2011 | from the print edition 0 40Like Battery technology Highly charged A powerful experimental battery that can be recharged completely in minutes ENGINEERS have long dreamed of shortening the time it takes to recharge batteries. Currently, that can be hours. For applications like motor vehicles

  1. I Like it When You Act Like a Leader: A Role Congruity Account of Romantic Desire for Powerful Opposite-Sex Others 

    E-Print Network [OSTI]

    Wilkey, Brian 1987-

    2013-01-11

    such expectations. To this end, we examined perceivers’ romantic liking for opposite-sex targets depending on whether or not the targets conformed to a powerful role. Participants interacted with two opposite-sex partners in brief, recorded sessions. We manipulated...

  2. Method and apparatus for assessing material properties of sheet-like materials

    DOE Patents [OSTI]

    Telschow, Kenneth L. (Idaho Falls, ID); Deason, Vance A. (Idaho Falls, ID)

    2002-01-01

    Apparatus for producing an indication of a material property of a sheet-like material according to the present invention may comprise an excitation source for vibrating the sheet-like material to produce at least one traveling wave therein. A light source configured to produce an object wavefront and a reference wavefront directs the object wavefront toward the sheet-like material to produce a modulated object wavefront. A modulator operatively associated with the reference wavefront modulates the reference wavefront in synchronization with the traveling wave on the sheet-like material to produce a modulated reference wavefront. A sensing medium positioned to receive the modulated object wavefront and the modulated reference wavefront produces an image of the traveling wave in the sheet-like material, the image of the anti-symmetric traveling wave being related to a displacement amplitude of the anti-symmetric traveling wave over a two-dimensional area of the vibrating sheet-like material. A detector detects the image of the traveling wave in the sheet-like material.

  3. Gas-like state of $?$ clusters around $^{16}$O core in $^{24}$Mg

    E-Print Network [OSTI]

    T. Ichikawa; N. Itagaki; T. Kawabata; Tz. Kokalova; W. von Oertzen

    2011-02-08

    We have studied gas-like states of $\\alpha$ clusters around an $^{16}$O core in $^{24}$Mg based on a microscopic $\\alpha$-cluster model. This study was performed by introducing a Monte Carlo technique for the description of the THSR (Tohsaki Horiuchi Schuck R\\"{o}pke) wave function, and the coupling effect to other low-lying cluster states was taken into account. A large isoscalar monopole ($E0$) transition strength from the ground to the gas-like state is discussed. The gas-like state of two $\\alpha$ clusters in $^{24}$Mg around the $^{16}$O core appears slightly below the 2$\\alpha$-threshold e

  4. Shrinking $\\hbar$ as a recipe for revealing classical-like contributions in optical potential cross sections

    E-Print Network [OSTI]

    R. Anni

    2001-02-14

    A simple recipe for revealing classical-like contributions in optical potential cross sections is proposed. The recipe is based on the fact that the classical-like properties are not expected to depend on the actual value of $\\hbar$. This allows us to identify the classical-like characteristics of an optical potential cross section by simply repeating the calculation with different values of $\\hbar$, and observing which properties of the cross section are invariant. This method is applied to the cross sections of a few optical potentials used to describe the recent data of light heavy-ion elastic scattering.

  5. Stormwater Runoff Treats Our Streams Like Sewers State of the Nation's River 2008

    E-Print Network [OSTI]

    Lawrence, Deborah

    Stormwater Runoff Treats Our Streams Like Sewers State of the Nation's River 2008 POTOMAC. The result? Waterways that function more as sewers than as natural streams. For example, fecal coliform is the overflow from combined stormwater sewer systems. Altho

  6. Search for new ?[superscript 0]-like particles produced in association with a ?-lepton pair

    E-Print Network [OSTI]

    Lees, J.?P.

    We report on a search in e[superscript +]e[superscript -] annihilations for new ?[superscript 0]-like particles produced in association with a ?-lepton pair. These objects, with a similar mass and similar decay modes to ...

  7. Assessment of Dioxin-Like Soil Contamination in Mexico by Enzyme-Linked Immunosorbent Assay

    E-Print Network [OSTI]

    Hammock, Bruce D.

    Assessment of Dioxin-Like Soil Contamination in Mexico by Enzyme-Linked Immunosorbent Assay E contaminants found in soil (Lor- ber et al. 1998; Nadal et al. 2002), sediment (Hilscherova et al. 2003), air

  8. Students experiencing flu-like symptoms, such as fever with cough and/or sore throat,

    E-Print Network [OSTI]

    Bou-Zeid, Elie

    Students experiencing flu-like symptoms, such as fever with cough and/or sore throat, should other difficulty breathing beyond a typical cough. Inform Undergraduates: Notify the director

  9. Microscale wear behavior and crosslinking of PEG-like coatings for total hip replacements

    E-Print Network [OSTI]

    Kane, Sheryl R.; Ashby, Paul D.; Pruitt, Lisa A.

    2010-01-01

    In contrast, the 40°C coatings were much more wear-and tribology of PEG-like coatings on UHMWPE for total hiphydrated polymer-on-polymer coatings. J Biomed Mater Res B.

  10. Generation and search of axion-like light particle using intense crystalline field

    E-Print Network [OSTI]

    Wei Liao

    2011-07-19

    Intense electric field $\\sim 10^{10}-10^{11}$ V/cm in crystal has been known for a long time and has wide applications. We study the conversion of axion-like light particle and photon in the intense electric field in crystal. We find that the conversion of axion-like particle and photon happens for energy larger than keV range. We propose search of axion-like light particle using the intense crystalline field. We discuss the solar axion search experiment and a variety of shining-through-wall experiment using crystalline field. Due to the intense crystalline field which corresponds to magnetic field $\\sim 10^4-10^5$ Tesla these experiments are very interesting. In particular these experiments can probe the mass range of axion-like particle from eV to keV.

  11. On the analogy between vehicle and vehicle-like cavities with reverberation chambers

    E-Print Network [OSTI]

    Herbert, Steven; Loh, Tian-Hong; Wassell, Ian; Rigelsford, Jonathan

    2014-10-17

    to what extent this analogy is valid. Specifically, the cavity time constant, electromagnetic isolation and electric field uniformity are investigated for typical vehicle and vehicle-like cavities. It is found that the time constant is a global property...

  12. Design of human-like posture prediction for inverse kinematic posture control of a humanoid robot

    E-Print Network [OSTI]

    Thomann, Derik (Derik S.)

    2005-01-01

    A method and system has been developed to solve the kinematic redundancy for a humanoid redundant manipulator based on forward kinematic equation and the optimization of human-like constraints. The Multiple Objective ...

  13. A chondrule-like object captured by space-exposed aerogel on the international space station

    E-Print Network [OSTI]

    Meyers, Stephen R.

    A chondrule-like object captured by space-exposed aerogel on the international space station T (Bradley, 2004; Brownlee, 1985). On the other hand, MMs are collected by melting and filtering of Antarctic

  14. When Like Charges Attract: Interactions and Dynamics in Charge-Stabilized Colloidal

    E-Print Network [OSTI]

    Grier, David

    When Like Charges Attract: Interactions and Dynamics in Charge-Stabilized Colloidal Suspensions as protein folding, DNA complexation, and the stability of industrial suspensions. Since the goal highly charged colloidal spheres dispersed in simple electrolytes yield several surprises. Isolated pairs

  15. Two-loop self-energy correction in high-Z hydrogen-like ions

    E-Print Network [OSTI]

    V. A. Yerokhin; P. Indelicato; V. M. Shabaev

    2003-02-28

    A complete evaluation of the two-loop self-energy diagrams to all orders in Z\\alpha is presented for the ground state of H-like ions with Z\\ge 40.

  16. Self/Non-self Discrimination by Toll-like Receptor 9

    E-Print Network [OSTI]

    Mouchess, Maria Luz

    2011-01-01

    by Toll-like Receptor 9 by Maria Luz Mouchess A dissertationlike Receptor 9 By Maria Luz Mouchess Doctor of Philosophywork to my parents, Maria Luz Jaramillo Mouchess and Luis

  17. Managing prisons using a ‘business-like approach: a case study of the Scottish Prison Service 

    E-Print Network [OSTI]

    Sangkhanate, Assanee

    2012-06-26

    The primary aim of this research is to examine the extent which prison management has been influenced by New Public Management (NPM). Much has been written about the growing influence of NPM on public services like health, ...

  18. Bioinformatic analysis of chicken chemokines, chemokine receptors, and Toll-like receptor 21 

    E-Print Network [OSTI]

    Wang, Jixin

    2006-10-30

    Chemokines triggered by Toll-like receptors (TLRs) are small chemoattractant proteins, which mainly regulate leukocyte trafficking in inflammatory reactions via interaction with G protein-coupled receptors. Forty-two ...

  19. Vehicle Technologies Office Merit Review 2014: Gasoline-Like Fuel Effects on Advanced Combustion Regimes

    Broader source: Energy.gov [DOE]

    Presentation given by Oak Ridge National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about gasoline-like...

  20. Reliable Recovery of Piled Box-like Objects via Parabolically Deformable Superquadrics

    E-Print Network [OSTI]

    and generic depalletizing systems stems pri- marily from the car and food industries. Such systems and piled box-like objects. A vacuum gripper is used for grasping the objects from their exposed surfaces

  1. Fracture characterization of clays and clay-like materials using flattened Brazilian Test

    E-Print Network [OSTI]

    Agaiby, Shehab Sherif Wissa

    2013-01-01

    Fracture mechanics has been used for many years to study the mechanical behavior of brittle and quasi-brittle materials like concrete, rock, wood, and ceramics. To date, the application of fracture mechanics to soils has ...

  2. Bat-like Mobile Robot for Tracking a Moving Obstacle Billur Barshan and Roman Kuc

    E-Print Network [OSTI]

    Barshan, Billur

    Bat-like Mobile Robot for Tracking a Moving Obstacle Billur Barshan and Roman Kuc Yale Uthversity the prey. Strategies employing either qualitative (prey is to the left or right) or quantitative (range

  3. Vehicle Technologies Office Merit Review 2015: Gasoline-Like Fuel Effects on Advanced Combustion Regimes

    Broader source: Energy.gov [DOE]

    Presentation given by Oak Ridge National Laboratory at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about gasoline-like...

  4. EZH2 promotes a bi-lineage identity in basal-like breast cancer cells

    E-Print Network [OSTI]

    Granit, R. Z.

    The mechanisms regulating breast cancer differentiation state are poorly understood. Of particular interest are molecular regulators controlling the highly aggressive and poorly differentiated traits of basal-like breast ...

  5. Resonantly photo-pumped nickel-like erbium X-ray laser

    DOE Patents [OSTI]

    Nilsen, Joseph (Livermore, CA)

    1990-01-01

    A resonantly photo-pumped X-ray laser (10) that enhances the gain of seve laser lines that also lase because of collisional excitations and recombination processes, is described. The laser comprises an aluminum (12) and erbium (14) foil combination (16) that is driven by two beams (18, 20) of intense line focused (22, 24) optical laser radiation. Ground state nickel-like erbium ions (34) are resonantly photo-pumped by line emission from hydrogen-like aluminum ions (32).

  6. Wall-associated kinase-like polypeptide mediates nutritional status perception and response

    DOE Patents [OSTI]

    Yang, Zhenbiao; Karr, Stephen

    2014-02-11

    The disclosure relates to methods for modulating plant growth and organogenesis using dominant-negative receptor-like kinases. The disclosure further provides a method for increasing plant yield relative to corresponding wild type plants comprising modulating the expression in a plant of a nucleic acid encoding a Wall-Associated Kinase-like 14 polypeptide or a homolog thereof, and selecting for plants having increased yield or growth on a nutrient deficient substrate.

  7. o I would like to make a donation to the Center for Refugee and Disaster Response

    E-Print Network [OSTI]

    Scharfstein, Daniel

    o I would like to make a donation to the Center for Refugee and Disaster Response in the amount Affairs 615 N. Wolfe Street / Suite W1600 Baltimore, MD 21205-2179 You can also donate online at www.jhsph.edu/refugee/make_a_gift o I would like to receive e-mail updates The Center for Refugee and Disaster Response works with its

  8. Relativistic configuration-interaction calculation of $K\\alpha$ transition energies in beryllium-like iron

    E-Print Network [OSTI]

    Yerokhin, V A; Fritzsche, S

    2014-01-01

    We perform relativistic configuration-interaction calculations of the energy levels of the low-lying and core-excited states of beryllium-like iron, Fe$^{22+}$. The results include the QED contributions calculated by two different methods, the model QED operator approach and the screening-potential approach. The uncertainties of theoretical energies are estimated systematically. The predicted wavelengths of the K\\alpha transitions in beryllium-like iron improve previous theoretical results and compare favorably with the experimental data.

  9. Scattering of Klein–Gordon particles by a Kink-like potential

    SciTech Connect (OSTI)

    Hassanabadi, H.; Lu, Liangliang; Maghsoodi, E.; Liu, Guanghui; Zarrinkamar, S.

    2014-03-15

    The Klein–Gordon equation for the non-minimal vector and a scalar Kink-like potential is solved in terms of the hypergeometric functions. The scattering problem, i.e. the transmission and reflection coefficients, is studied as well. -- Highlights: •The Klein–Gordon equation for the non-minimal vector and a scalar Kink-like potential is solved. •We have calculated the corresponding transmission and reflection coefficients. •We discussed the behavior of the reflection and transmission coefficients vs. energy.

  10. Controlled synthesis of snowflake-like self-assemblies palladium nanostructures under microwave irradiation

    SciTech Connect (OSTI)

    Xie, Ting; Ma, Yue; Yang, Hanmin, E-mail: yanghanmin@hotmail.com; Li, Jinlin

    2013-08-01

    Graphical abstract: - Highlights: • We demonstrated the synthesis of snowflake-like palladium nanostructures for the first time. • We discussed the influencing factors on the synthesis of snowflake-like Pd nanostructures. • The molar ratio of H{sub 2}Pd{sub 4} to PVP at 5 is the optimal selection. • The growth process was discussed. - Abstract: Self-assembly snowflake-like palladium nanostructures were synthesized under microwave irradiation using H{sub 2}PdCl{sub 4} as precursor, benzyl alcohol as both solvent and reducing agent, and PVP as stabilizer. The Pd snowflake-like nanostructures were formed and then characterized by transmission electron microscopy (TEM) and X-ray powder diffraction. The TEM images showed that the Pd nano-snowflakes were self-assemblies organized by hundreds of small spherical nanoparticles. Pd snowflake-like nanostructures with well-defined shape and uniform size can be obtained by tuning the concentration of palladium precursor, the molar ratio of H{sub 2}PdCl{sub 4}/PVP, as well as the heating time by microwave irradiation. The possible growing process of the snowflake-like Pd structures was also proposed on the basis of investigating the properties of as-synthesized Pd nanostructures under different conditions.

  11. Amphitrite ornata Dehaloperoxidase (DHP): Investigations of Structural Factors That Influence the Mechanism of Halophenol Dehalogenation Using ;Peroxidase-like; Myoglobin Mutants and ;Myoglobin-like; DHP Mutants

    SciTech Connect (OSTI)

    Du, Jing; Huang, Xiao; Sun, Shengfang; Wang, Chunxue; Lebioda, Lukasz; Dawson, John H. (SC)

    2012-05-14

    Dehaloperoxidase (DHP), discovered in the marine terebellid polychaete Amphitrite ornata, is the first heme-containing globin with a peroxidase activity. The sequence and crystal structure of DHP argue that it evolved from an ancient O{sub 2} transport and storage globin. Thus, DHP retains an oxygen carrier function but also has the ability to degrade halophenol toxicants in its living environment. Sperm whale myoglobin (Mb) in the ferric state has a peroxidase activity {approx}10 times lower than that of DHP. The catalytic activity enhancement observed in DHP appears to have been generated mainly by subtle changes in the positions of the proximal and distal histidine residues that appeared during DHP evolution. Herein, we report investigations into the mechanism of action of DHP derived from examination of 'peroxidase-like' Mb mutants and 'Mb-like' DHP mutants. The dehalogenation ability of wild-type Mb is augmented in the peroxidase-like Mb mutants (F43H/H64L, G65T, and G65I Mb) but attenuated in the Mb-like T56G DHP variant. X-ray crystallographic data show that the distal His residues in G65T Mb and G65I are positioned {approx}0.3 and {approx}0.8 {angstrom}, respectively, farther from the heme iron compared to that in the wild-type protein. The H93K/T95H double mutant Mb with the proximal His shifted to the 'DHP-like' position has an increased peroxidase activity. In addition, a better dehaloperoxidase (M86E DHP) was generated by introducing a negative charge near His89 to enhance the imidazolate character of the proximal His. Finally, only minimal differences in dehalogenation activities are seen among the exogenous ligand-free DHP, the acetate-bound DHP, and the distal site blocker L100F DHP mutant. Thus, we conclude that binding of halophenols in the internal binding site (i.e., distal cavity) is not essential for catalysis. This work provides a foundation for a new structure-function paradigm for peroxidases and for the molecular evolution of the dual-function enzyme DHP.

  12. Studies of Intermittency-like Phenomena in Plasma turbulence at IPR

    SciTech Connect (OSTI)

    Jha, R.; Das, A.; Bisai, N.; Kaw, P. [Institute for Plasma Research, Bhat, Near Indira Bridge, Gandhinagar-382428 (India)

    2010-11-23

    The observation of intermittency in the turbulent scrape-off layer plasma of ADITYA tokamak was first reported about one and a half decade ago. In the last decade or so, several aspects of intermittency-like phenomena have been observed on tokamaks and other fusion devices throughout the world. A review of the research carried out at the Institute for Plasma Research (IPR) is presented, which closely follow the research trend on intermittency-like phenomena in plasmas worldwide. We also present our analysis of particle flux data in order to test the recently proposed fluctuation theorem, which states that the probability of 'entropy consuming' flux events falls off exponentially with the averaging time. This theorem, proposed in the context of small systems, is applied to macroscopic system like tokamak edge plasma by invoking an 'effective temperature' of the bath of drift waves from which, plasma objects take energy and carry out work of transporting matter

  13. Vapor-like liquid coexistence densities affect the extension of the critical point's influence zone

    E-Print Network [OSTI]

    Rivera, Jose Luis; Guerra-Gonzalez, Roberto

    2015-01-01

    The critical point affects the coexistence behavior of the vapor-liquid equilibrium densities. The length of the critical influence zone is under debate because for some properties, like shear viscosity, the extension is only a few degrees, while for others, such as the density order parameter, the critical influence zone range covers up to hundreds of degrees below the critical temperature. Here we show that for a simple molecular potential of ethane, the critical influence zone covers a wide zone of tens of degrees (below the critical temperature) down to a transition temperature, at which the apparent critical influence zone vanishes and the transition temperature can be predicted through a pressure analysis of the coexisting bulk liquid phase. The liquid phases within the apparent critical influence zone show low densities, making them behave internally like their corresponding vapor phases. Therefore, the experimentally observed wide extension of the critical influence zone is due to a vapor-like effect ...

  14. Minimal conditions for the existence of a Hawking-like flux

    E-Print Network [OSTI]

    Barcelo, Carlos; Sonego, Sebastiano; Visser, Matt

    2010-01-01

    We investigate the minimal conditions that an asymptotically flat general relativistic spacetime must satisfy in order for a Hawking-like Planckian flux of particles to arrive at future null infinity. We demonstrate that there is no requirement that any sort of horizon form anywhere in the spacetime. We find that the irreducible core requirement is encoded in an approximately exponential "peeling" relationship between affine coordinates on past and future null infinity. As long as a suitable adiabaticity condition holds, then a Planck-distributed Hawking-like flux will arrive at future null infinity with temperature determined by the e-folding properties of the outgoing null geodesics. The temperature of the Hawking-like flux can slowly evolve as a function of time. We also show that the notion of "peeling" of null geodesics is distinct, and in general different, from the usual notion of "inaffinity" used in Hawking's definition of surface gravity.

  15. Network Biology of Tumor Stem-like Cells Identified a Regulatory Role of CBX5 in Lung Cancer

    E-Print Network [OSTI]

    Yu, Yau-Hua

    Mounting evidence links cancers possessing stem-like properties with worse prognosis. Network biology with signal processing mechanics was explored here using expression profiles of a panel of tumor stem-like cells (TSLCs). ...

  16. Evaluation and Interconversion of Various Indicator PCB Schemes for PCB and Dioxin-Like PCB Toxic Equivalent Levels in Fish

    E-Print Network [OSTI]

    Arhonditsis, George B.

    Evaluation and Interconversion of Various Indicator PCB Schemes for PCB and Dioxin-Like PCB ToxicPCB schemes in estimating total of PCB congeners (PCB) and dioxin-like PCB toxic equivalent (dl

  17. High Resolution Near-Infrared Spectroscopy of FUors and FUor-like stars

    E-Print Network [OSTI]

    Tom Greene; Colin Aspin; Bo Reipurth

    2008-01-27

    We present new high resolution (R=18,000) near-infrared spectroscopic observations of a sample of classical FU Orionis stars (FUors) and other young stars with FUor characteristics that are sources of Herbig-Haro flows. Spectra are presented for the region 2.203 - 2.236 microns which is rich in absorption lines sensitive to both effective temperatures and surface gravities of stars. Both FUors and FUor-like stars show numerous broad and weak unidentified spectral features in this region. Spectra of the 2.280 - 2.300 micron region are also presented, with the 2.2935 micron v=2-0 CO absorption bandhead being clearly the strongest feature seen in the spectra all FUors and Fuor-like stars. A cross-correlation analysis shows that FUor and FUor-like spectra in the 2.203 - 2.236 micron region are not consistent with late-type dwarfs, giants, nor embedded protostars. The cross-correlations also show that the observed FUor-like Herbig-Haro energy sources have spectra that are substantively similar to those of FUors. Both object groups also have similar near-infrared colors. The large line widths and double-peaked nature of the spectra of the FUor-like stars are consistent with the established accretion disk model for FUors, also consistent with their near-infrared colors. It appears that young stars with FUor-like characteristics may be more common than projected from the relatively few known classical FUors.

  18. THE OCCURRENCE RATE OF EARTH ANALOG PLANETS ORBITING SUN-LIKE STARS

    SciTech Connect (OSTI)

    Catanzarite, Joseph; Shao, Michael

    2011-09-10

    Kepler is a space telescope that searches Sun-like stars for planets. Its major goal is to determine {eta}{sub Earth}, the fraction of Sun-like stars that have planets like Earth. When a planet 'transits' or moves in front of a star, Kepler can measure the concomitant dimming of the starlight. From analysis of the first four months of those measurements for over 150,000 stars, Kepler's Science Team has determined sizes, surface temperatures, orbit sizes, and periods for over a thousand new planet candidates. In this paper, we characterize the period probability distribution function of the super-Earth and Neptune planet candidates with periods up to 132 days, and find three distinct period regimes. For candidates with periods below 3 days, the density increases sharply with increasing period; for periods between 3 and 30 days, the density rises more gradually with increasing period, and for periods longer than 30 days, the density drops gradually with increasing period. We estimate that 1%-3% of stars like the Sun are expected to have Earth analog planets, based on the Kepler data release of 2011 February. This estimate of {eta}{sub Earth} is based on extrapolation from a fiducial subsample of the Kepler planet candidates that we chose to be nominally 'complete' (i.e., no missed detections) to the realm of the Earth-like planets, by means of simple power-law models. The accuracy of the extrapolation will improve as more data from the Kepler mission are folded in. Accurate knowledge of {eta}{sub Earth} is essential for the planning of future missions that will image and take spectra of Earth-like planets. Our result that Earths are relatively scarce means that a substantial effort will be needed to identify suitable target stars prior to these future missions.

  19. Self-oscillation in spin torque oscillator stabilized by field-like torque

    SciTech Connect (OSTI)

    Taniguchi, Tomohiro; Tsunegi, Sumito; Kubota, Hitoshi; Imamura, Hiroshi

    2014-04-14

    The effect of the field-like torque on the self-oscillation of the magnetization in spin torque oscillator with a perpendicularly magnetized free layer was studied theoretically. A stable self-oscillation at zero field is excited for negative ? while the magnetization dynamics stops for ??=?0 or ??>?0, where ? is the ratio between the spin torque and the field-like torque. The reason why only the negative ? induces the self-oscillation was explained from the view point of the energy balance between the spin torque and the damping. The oscillation power and frequency for various ? were also studied by numerical simulation.

  20. Large amplitude oscillation of magnetization in spin-torque oscillator stabilized by field-like torque

    SciTech Connect (OSTI)

    Taniguchi, Tomohiro Kubota, Hitoshi; Imamura, Hiroshi; Tsunegi, Sumito

    2015-05-07

    Oscillation frequency of spin torque oscillator with a perpendicularly magnetized free layer and an in-plane magnetized pinned layer is theoretically investigated by taking into account the field-like torque. It is shown that the field-like torque plays an important role in finding the balance between the energy supplied by the spin torque and the dissipation due to the damping, which results in a steady precession. The validity of the developed theory is confirmed by performing numerical simulations based on the Landau-Lifshitz-Gilbert equation.

  1. 5d $E_n$ Seiberg-Witten curve via toric-like diagram

    E-Print Network [OSTI]

    Sung-Soo Kim; Futoshi Yagi

    2015-06-16

    We consider 5d Sp(1) gauge theory with $E_{N_f+1}$ global symmetries based on toric(-like) diagram constructed from (p,q)-web with 7-branes. We propose a systematic procedure to compute the Seiberg-Witten curve for generic toric-like diagram. For $N_f=6,7$ flavors, we explicitly compute the Seiberg-Witten curves for 5d Sp(1) gauge theory, and show that these Seiberg-Witten curves agree with already known $E_{7,8}$ results. We also discuss a generalization of the Seiberg-Witten curve to rank-N cases.

  2. Magnetic configuration dependence of magnetoresistance in a Fe-porphyrin-like carbon nanotube spintronic device

    SciTech Connect (OSTI)

    Zeng, Jing; Chen, Ke-Qiu

    2014-01-20

    By using nonequilibrium Green's functions in combination with the density functional theory, we investigate the spin-dependent transport properties in a Fe-porphyrin-like carbon nanotube spintronic device. The results show that magnetoresistance ratio is strongly dependent on the magnetic configuration of the Fe-porphyrin-like carbon nanotube. Under the application of the external magnetic field, the magnetoresistance ratio of the device can be increased from about 19% to about 1020% by tuning the magnetic configuration in the device. Our results confirm that the magnetic configuration is a key factor for obtaining a high-performance spintronic device.

  3. High efficiency coaxial klystron-like relativistic backward wave oscillator with a premodulation cavity

    SciTech Connect (OSTI)

    Xiao Renzhen; Teng Yan; Chen Changhua; Sun Jun [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 (China)

    2011-11-15

    The klystron-like relativistic backward wave oscillator (RBWO) combines the transition radiation with Cerenkov radiation and has demonstrated microwave output of high power and high efficiency. The coaxial slow wave structure device can produce microwave with a lower frequency in a smaller cross section. For the purpose of high efficiency, low frequency, and miniaturization, a coaxial klystron-like RBWO with a premodulation cavity is presented. Particle-in-cell simulations show that a microwave with power of 1.15 GW and frequency of 2.1 GHz is generated with conversion efficiency of 48%, whereas for the device with a reflector, the efficiency is 38%.

  4. Monodromy and Jacobi-like Relations for Color-Ordered Amplitudes

    E-Print Network [OSTI]

    N. E. J. Bjerrum-Bohr; Poul H. Damgaard; Thomas Sondergaard; Pierre Vanhove

    2010-03-11

    We discuss monodromy relations between different color-ordered amplitudes in gauge theories. We show that Jacobi-like relations of Bern, Carrasco and Johansson can be introduced in a manner that is compatible with these monodromy relations. The Jacobi-like relations are not the most general set of equations that satisfy this criterion. Applications to supergravity amplitudes follow straightforwardly through the KLT-relations. We explicitly show how the tree-level relations give rise to non-trivial identities at loop level.

  5. Resonance-like nuclear processes in solids: 3rd and 4th order processes

    E-Print Network [OSTI]

    Péter Kálmán; Tamás Keszthelyi

    2013-03-06

    It is recognized that in the family of heavy charged particle and electron assisted double nuclear processes resonance-like behavior can appear. The transition rates of the heavy particle assisted 3rd-order and electron assisted 4th-order resonance like double nuclear processes are determined. The power of low energy nuclear reactions in $Ni-H$ systems formed in $Ni$ placed in $H_{2}$ gas environment is treated. Nuclear power produced by quasi-resonant electron assisted double nuclear processes in these $Ni-H$ systems is calculated. The power obtained tallies with experiments and its magnitude is considerable for practical applications.

  6. Metal oxide superconducting powder comprised of flake-like single crystal particles

    DOE Patents [OSTI]

    Capone, D.W.; Dusek, J.

    1994-10-18

    Powder of a ceramic superconducting material is synthesized such that each particle of the powder is a single crystal having a flake-like, nonsymmetric morphology such that the c-axis is aligned parallel to the short dimension of the flake. Nonflake powder is synthesized by the normal methods and is pressed into pellets or other shapes and fired for excessive times to produce a coarse grained structure. The fired products are then crushed and ground producing the flake-like powder particles which exhibit superconducting characteristics when aligned with the crystal lattice. 3 figs.

  7. Reynolds number dependence of drag reduction by rod-like polymers

    E-Print Network [OSTI]

    Yacine Amarouchene; Daniel Bonn; Hamid Kellay; Ting-Shek Lo; Victor S. L'vov; Itamar Procaccia

    2006-07-06

    We present experimental and theoretical results addressing the Reynolds number (Re) dependence of drag reduction by sufficiently large concentrations of rod-like polymers in turbulent wall-bounded flows. It is shown that when Re is small the drag is {\\em enhanced}. On the other hand when Re increases the drag is reduced and eventually the Maximal Drag Reduction (MDR) asymptote is attained. The theory is shown to be in excellent agreement with experiments, rationalizing and explaining all the universal and the non-universal aspects of drag reduction by rod-like polymers.

  8. LIKE A SUBURBAN DRONE by THE CAPITOL STEPS From Thank God I'm a Contra Boy

    E-Print Network [OSTI]

    Srinivasan, Aravind

    LIKE A SUBURBAN DRONE by THE CAPITOL STEPS From Thank God I'm a Contra Boy: Once upon a time you And a colonial home Like a suburban drone Ah you thought that life was meaningless joined the SDS you were so To have a cellular phone And a colonial home Like a suburban drone Ah you thought that life

  9. Kalinella bambusicola gen. et sp. nov. (Trebouxiophyceae, Chlorophyta), a novel coccoid Chlorella-like subaerial alga

    E-Print Network [OSTI]

    -like subaerial alga from Southeast Asiapre_534 159..169 Jirí Neustupa,* Yvonne Nemcová, Marek Eliás and Pavel, Czech Republic SUMMARY The traditional green algal genus Chlorella, which com- prised coccoid algae lineage of the trebouxiophycean Watanabea clade, dissimilar from other members of this group. The alga has

  10. : Catechin, green tea component, causes caspase independent necrosis-like cell death in chronic myelogenous leukemia

    E-Print Network [OSTI]

    Huang, Ching-Tsan

    : Catechin, green tea component, causes caspase independent necrosis-like cell death in chronic: 710­5. 2. Ahmad N, Feyes DK, Nieminen AL, Agarwal R, Mukhtar H. Green tea constituent epigallocatechin Inst, 1997. 89: 1881­6. 3. Nakazato T, Ito K, Miyakawa Y et al. Catechin, a green tea component

  11. THINKING LIKE ARCHIMEDES WITH A 3D PRINTER OLIVER KNILL AND ELIZABETH SLAVKOVSKY

    E-Print Network [OSTI]

    Knill, Oliver

    THINKING LIKE ARCHIMEDES WITH A 3D PRINTER OLIVER KNILL AND ELIZABETH SLAVKOVSKY Abstract. We illustrate Archimedes' method using models produced with 3D printers. This approach allowed us to create- iment, we follow his steps by building models produced with modern 3D printers. Archimedes was an early

  12. Is a Machine Realization of Truly Human-Like Intelligence Achievable?

    E-Print Network [OSTI]

    McClelland, James L. "Jay"

    Is a Machine Realization of Truly Human-Like Intelligence Achievable? James L. McClelland Published a century of research on machine intelligence, humans remain far better than our strongest computing machines at a wide range of natural cognitive tasks, such as object recognition, lan- guage comprehension

  13. DESIGN AND PERFORMANCE OF A FISH FIN-LIKE PROPULSOR FOR AUVS George V. Lauder1

    E-Print Network [OSTI]

    Lauder, George V.

    embarked on a research program designed to develop a maneuvering propulsor for AUVs based on the mechanical1 DESIGN AND PERFORMANCE OF A FISH FIN-LIKE PROPULSOR FOR AUVS George V. Lauder1 , Peter Madden1 of Mechanical and Aerospace Engineering, 707 22nd Street, Staughton Hall The George Washington University

  14. Efficient weakly-radiative wireless energy transfer: An EIT-like approach

    E-Print Network [OSTI]

    of renewable energy, energy storage and management, etc. In particular, there is a substantial recent interest [1­5] in enabling efficient and safe wireless energy transfer, motivated by the increased 0003Efficient weakly-radiative wireless energy transfer: An EIT-like approach Rafif E. Hamam

  15. Star-like polymer click-functionalized with small capping molecules: an initial investigation into

    E-Print Network [OSTI]

    Lin, Zhiqun

    , as well as being examined by proton nuclear magnetic resonance (1 H-NMR), Fourier transform infrared -pentylbiphenyl (5CB). Structure and phase behavior were evaluated by AFM and optical imaging. Star-like PAA display technology,3,4,20 photonics,5,21,22 optics,3,5,17,23 sensors and metamaterials.3,17 Furthermore

  16. ENHANCEMENT OF SUPERCONDUCTING Tc IN Pd-H LIKE COMPOUNDS BY OPTICAL PHONONS

    E-Print Network [OSTI]

    Boyer, Edmond

    1227 ENHANCEMENT OF SUPERCONDUCTING Tc IN Pd-H LIKE COMPOUNDS BY OPTICAL PHONONS J. P. BURGER and D.450 1. Introduction. - The high superconducting tran- sition temperatures recently observed in Pd [1 interaction inhibiting superconductivity in pure Pd. As the density of states in Pd-H is rather similar [5

  17. ORIGINAL PAPER Speech Preference is Associated with Autistic-Like Behavior

    E-Print Network [OSTI]

    Vouloumanos, Athena

    Research Council 2001). But indices of autism-like behaviors in the first year of life remain elusive- cies-typical perceptual biases that direct their attention to socially relevant stimuli such as voices non-speech and non-faces (Butterfield and Siperstein 1970; Johnson et al. 1991; Valenza et al. 1996

  18. Static vacuum solutions from convergent null data expansions at space-like infinity

    E-Print Network [OSTI]

    Static vacuum solutions from convergent null data expansions at space-like infinity Helmut Abstract We study formal expansions of asymptotically flat solutions to the static vacuum field equations characterization of all asymptotically flat solutions to the static vacuum field equations. PACS: 04.20.Ex, 04

  19. Implementing TMN-like Management Services in a TINA Compliant Architecture

    E-Print Network [OSTI]

    Griffin, David

    Implementing TMN-like Management Services in a TINA Compliant Architecture: A Case Study Abstract TINA aims to provide an architecture to enable telecommunications networks to support the flex in an integrated fashion. While the specifications in the TINA Service Architecture are well advanced, network

  20. Light-Like Noncommutativity, Light-Front Quantization and New Light on UV/IR Mixing

    E-Print Network [OSTI]

    M. M. Sheikh-Jabbari; A. Tureanu

    2010-10-02

    We revisit the problem of quantizing field theories on noncommutative Moyal spacetime with \\emph{light-like} noncommutativity. To tackle the issues arising from noncommuting and hence nonlocal time, we argue that for this case light-front quantization procedure should be employed. In this appropriate quantization scheme we perform the non-planar loop analysis for the light-like noncommutative field theories. One of the important and peculiar features of light-front quantization is that the UV cutoff of the light-cone Hamiltonian manifests itself as an IR cutoff for the light-cone momentum, $p^+$. Due to this feature, the naive results of covariant quantization for the light-like case allude to the absence of the UV/IR mixing in the light-front quantization. However, by a careful analysis of non-planar loop integrals we show that this is not the case and the UV/IR mixing persists. In addition, we argue in favour of the perturbative unitarity of light-like noncommutative field theories in the light-front quantization scheme.

  1. What is History? History is more than simply fact-gathering. Like all

    E-Print Network [OSTI]

    Saldin, Dilano

    What is History? History is more than simply fact-gathering. Like all of the liberal arts, history to formulate conclusions, test results and communicate new ideas. Career Opportunities History majors make good of history requires the ability to investigate, analyze and communicate complex interrelationships

  2. Neurocomputing 70 (2007) 26922700 Inter-spike-intervals analysis of AER Poisson-like generator hardware

    E-Print Network [OSTI]

    Barranco, Bernabe Linares

    2007-01-01

    Neurocomputing 70 (2007) 2692­2700 Inter-spike-intervals analysis of AER Poisson-like generator Sevilla, Spain Available online 10 May 2007 Abstract Address­Event­Representation (AER) is a communication). In developing AER-based systems it is very convenient to have available some means of generating AER streams

  3. Introduction The use of ethanol as a gasoline additive is likely to

    E-Print Network [OSTI]

    Alvarez, Pedro J.

    Introduction The use of ethanol as a gasoline additive is likely to increase in the near future investigators have developed mathematical models for predicting the effect of ethanol (added to gasoline at 10 these models provide valuable insight into the potential ground water impacts of ethanol in gasoline

  4. Discrete molecular dynamics studies of the folding of a protein-like model

    E-Print Network [OSTI]

    Buldyrev, Sergey

    Discrete molecular dynamics studies of the folding of a protein-like model Nikolay V Dokholyan1 to resolve in time the folding of model proteins in computer simulations. Different computational approaches). Results: We used the recently proposed approach of Zhou and Karplus to study the folding of a protein

  5. Extraordinary Transmission of Three-Dimensional Crescent-like Holes Arrays

    E-Print Network [OSTI]

    an extraordinary optical transmission in this non-planar perforated periodic array of 3DCLH when the electric fieldExtraordinary Transmission of Three-Dimensional Crescent-like Holes Arrays Yang Shen & Mingkai Liu peak is insensitive with the incident angles and sensitive with the angle between the electric field

  6. DEVELOPMENT OF FISH-LIKE SWIMMING BEHAVIOURS FOR AN AUTONOMOUS ROBOTIC FISH

    E-Print Network [OSTI]

    Hu, Huosheng

    DEVELOPMENT OF FISH-LIKE SWIMMING BEHAVIOURS FOR AN AUTONOMOUS ROBOTIC FISH Jindong Liu, Ian Dukes CO4 3SQ, United Kingdom Email: {jliua, idukes, rrknig, hhu}@essex.ac.uk Keywords: Robotic fish the fish movement into several basic behaviours, namely straight cruise, cruise in turn and sharp turn

  7. A Methodology of Modelling Fish-like Swim Patterns for Robotic Fish

    E-Print Network [OSTI]

    Hu, Huosheng

    A Methodology of Modelling Fish-like Swim Patterns for Robotic Fish Jindong Liu and Huosheng Hu@essex.ac.uk Abstract-- This paper presents a novel modelling methodology for our robotic fish, which considers the relative movement of the tail to the head in order to model variable swimming patterns for robotic fish

  8. 2006 Nature Publishing Group A Devonian tetrapod-like fish and the

    E-Print Network [OSTI]

    Bechtold, Jill

    © 2006 Nature Publishing Group A Devonian tetrapod-like fish and the evolution of the tetrapod body vertebrates (tetrapods) to lobe-finned fish (sarcopterygians) is well established, but the origin of major changes. Here we report the discovery of a well-preserved species of fossil sarcopterygian fish from

  9. Campus Art Walk Like many other colleges and universities, the campus

    E-Print Network [OSTI]

    Matrajt, Graciela

    Campus Art Walk Like many other colleges and universities, the campus shared by Cascadia of significant and beautiful works of art. The collection, located both inside and outside buildings and sculptures. Art on the CCC/UWB campus is the result of generous donations from private citizens

  10. On models for viscoelastic fluid-like materials that are mechanically incompressible and

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    On models for viscoelastic fluid-like materials that are mechanically incompressible and thermally of the full Navier­Stokes­Fourier system. J. Math. Fluid Mech., 11:274­302, 2009 Mechanically incompressible;Viscoelastic fluids ­ Maxwell model F l lsld µm m Mechanical analogue: Spring ­ energy storage. Dashpot

  11. Isatin Compounds as Noncovalent SARS Coronavirus 3C-like Protease Inhibitors

    E-Print Network [OSTI]

    Luhua, Lai

    , such as human rhinovirus (HRV) 3C protease. Therefore, HRV 3C protease inhibitors may also be potential HRV inhibitors were effective SARS CoV 3C-like protease inhibitors.13 They focused mainly on the isatin C-4, C-5, C-7, and N substituents, aiming at the two sites (P1, P2) that were important for HRV

  12. Osmotically induced deformation of capsid-like icosahedral vesicles Gaelle Bealle,ab

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Osmotically induced deformation of capsid-like icosahedral vesicles Gaelle Bealle,ab Jacques We report the osmotic deformation of micron-size catanionic vesicles with icosahedral symmetry (20 at low osmotic pressure gradients across the bilayer, or spherical for outwards gradients. Above

  13. On the Levy-walk Nature of Human Mobility: Do Humans Walk like Monkeys?

    E-Print Network [OSTI]

    Young, R. Michael

    such as the power-law distributions of human inter-contact times and that the simulation performance of mobileOn the Levy-walk Nature of Human Mobility: Do Humans Walk like Monkeys? Injong Rhee, Minsu Shin, Seongik Hong, Kyunghan Lee and Song Chong Abstract--We report that human walk patterns closely follow Levy

  14. Structural Basis for the Acyltransferase Activity of Lecithin:Retinol Acyltransferase-like Proteins*S

    E-Print Network [OSTI]

    Palczewski, Krzysztof

    , Ohio 44106 and the ¶ Department of Medicine, Columbia University, New York, New York 10032 Background, a representative member of this group, plays a key role in regulating triglyceride accumulation and energy acyltransferase-like proteins and provide evidence for their alternative robust lipid-dependent acyltransferase

  15. Engineered proteins stick like glue --even in water1 www.sciencedaily.com2

    E-Print Network [OSTI]

    South Bohemia, University of

    Engineered proteins stick like glue -- even in water1 www.sciencedaily.com2 3 Shellfish such as mussels and barnacles secrete very sticky proteins that help them cling to rocks or ship hulls, even naturally sticky mussel proteins as well as a bacterial protein found in biofilms --7 slimy layers formed

  16. SHARE: 0 0Like Share Tweet Adjust text size: NEWS CATEGORIES

    E-Print Network [OSTI]

    Chiao, Jung-Chih

    · Ubuntu Software Center Features a Game that Costs $50,000 (37,000) Advanced Power & Solar www REVIEWS >> MEET THE EDITORS >> 43k Find us on Google+ 190kLike Follow @softpedia TRENDING TODAY Home so you can place them on a sleeve for your smart phone ." "When the phone is out of battery power

  17. Compiler Analysis to Support Compiled Communication for HPF--like programs Xin Yuan \\Lambda

    E-Print Network [OSTI]

    Compiler Analysis to Support Compiled Communication for HPF--like programs Xin Yuan \\Lambda Dept at compile time, the compiled communication technique greatly improves the communication performance for communication patterns that are known at compile time. In order to support com­ piled communication

  18. Damage to nearby divertor components of ITER-like devices during giant ELMs and disruptions

    E-Print Network [OSTI]

    Harilal, S. S.

    Damage to nearby divertor components of ITER-like devices during giant ELMs and disruptions. Fusion 50 (2010) 115004 (7pp) doi:10.1088/0029-5515/50/11/115004 Damage to nearby divertor components. The simulation results of the integrated modelling indicate a significant potential damage of the divertor nearby

  19. Crystal Structure of Arcelin-5, a Lectin-like Defense Protein from Phaseolus vulgaris*

    E-Print Network [OSTI]

    Hamelryck, Thomas

    arcelin and -amylase inhibitor. In these so-called lectin-like proteins, respectively one and two loops essential for the sugar-binding capabilities of the legume lectins are deleted. The -amylase inhibitor inhibits -amy- lases of mammalian and insect origin but does not inhibit plant -amylases. Arcelin is only

  20. A green astro-comb for Earth-like exoplanet searches Chih-Hao Li,1,*

    E-Print Network [OSTI]

    Walsworth, Ronald L.

    optical spectrum analyzer and the insert spectrum is measured with a high resolution Fourier transform-like stars using periodic Doppler shift of stellar spectrum require better than 10 cm/s precision spectrograph is accurate to spectrum provides sufficient SNR to realize

  1. Testing quantum-like models of judgment for question order effect

    E-Print Network [OSTI]

    Thomas Boyer-Kassem; Sébastien Duchêne; Éric Guerci

    2015-08-25

    Lately, so-called "quantum" models, based on parts of the mathematics of quantum mechanics, have been developed in decision theory and cognitive sciences to account for seemingly irrational or paradoxical human judgments. We consider here some such quantum-like models that address question order effects, i.e. cases in which given answers depend on the order of presentation of the questions. Models of various dimensionalities could be used, can the simplest ones be empirically adequate? From the quantum law of reciprocity, we derive new empirical predictions that we call the Grand Reciprocity equations, that must be satisfied by several existing quantum-like models, in their non-degenerate versions. Using substantial existing data sets, we show that these non-degenerate versions fail the GR test in most cases, which means that, if quantum-like models of the kind considered here are to work, it can only be in their degenerate versions. However, we suggest that the route of degenerate models is not necessarily an easy one, and we argue for more research on the empirical adequacy of degenerate quantum-like models in general.

  2. Jet-like circulations occur in the `simple' geometries of gas planets and Earth's

    E-Print Network [OSTI]

    #12;Jet-like circulations occur in the `simple' geometries of gas planets and Earth's liquid to barotropize jets => life cycles of BC instability. large-scale PV gradients act as source of eddy entrophy The Jet Stream Conundrum Baldwin, Rhines, Huang & McIntyre, Nature 2007 #12;For Earth's oceans, density

  3. Improved Confinement in JET High {beta} Plasmas with an ITER-Like Wall

    E-Print Network [OSTI]

    Challis, C D; Beurskens, M; Buratti, P; Delabie, E; Drewelow, P; Frassinetti, L; Giroud, C; Hawkes, N; Hobirk, J; Joffrin, E; Keeling, D; King, D B; Maggi, C F; Mailloux, J; Marchetto, C; McDonald, D; Nunes, I; Pucella, G; Saarelma, S; Simpson, J

    2015-01-01

    The replacement of the JET carbon wall (C-wall) by a Be/W ITER-like wall (ILW) has affected the plasma energy confinement. To investigate this, experiments have been performed with both the C-wall and ILW to vary the heating power over a wide range for plasmas with different shapes.

  4. ConTrack: Finding the most likely pathways between brain regions using diffusion tractography

    E-Print Network [OSTI]

    Wandell, Brian A.

    to identify the most likely pathways connecting two regions. In a series of experiments using human data, we for measuring white matter pathways in the living human brain. DFT is often used to discover new pathways algorithms. Keywords: diffusion imaging, fiber tractography, MT+, corpus callosum, optic radiation Citation

  5. I would like all figures in my article published in Black and White Education in Brazil

    E-Print Network [OSTI]

    Barbosa, Marcia C. B.

    I would like all figures in my article published in Black and White Education in Brazil: Marcia C Postal 15051 91501970, Porto Alegre, RS, Brazil marcia. barbosa@ufrgs.br Keywords Gender, Physics, Brazil Abstract An overview of the Brazilian educational system is presented with the main

  6. Potential Threats from a Likely Nuclear Power Plant Accident: a Climatological Trajectory Analysis

    E-Print Network [OSTI]

    Chen, Shu-Hua

    in the near future as insecure nuclear power plants with a high risk of accidents remain in the regionPotential Threats from a Likely Nuclear Power Plant Accident: a Climatological Trajectory Analysis at the Metsamor Nuclear Power Plant would influence all of Turkey. Furthermore, vulnerable regions in Turkey after

  7. ORIGINAL ARTICLE Chronic dim light at night provokes reversible depression-like

    E-Print Network [OSTI]

    Nelson, Randy J.

    .96; published online 24 July 2012 Keywords: BDNF; cytokine; hamster; hippocampus; light pollution; Phodopus in the United States and Europe experience nightly light pollution.8 Such unnatural conditions almost certainlyORIGINAL ARTICLE Chronic dim light at night provokes reversible depression-like phenotype: possible

  8. WHY MECHANICAL DESIGN CANNOT BE LIKE VLSI DESIGN Daniel E Whitney

    E-Print Network [OSTI]

    Whitney, Daniel

    4/4/96 1 WHY MECHANICAL DESIGN CANNOT BE LIKE VLSI DESIGN by Daniel E Whitney MIT ABSTRACT mechanical design from approaching the ideal of VLSI design methods. The argument is accompanied by examples and brief histories of the evolution of VLSI design methods and attempts to systematize mechanical design

  9. A Vervaat-like path transformation for the re ected Brownian bridge

    E-Print Network [OSTI]

    Henri Poincaré -Nancy-Université, Université

    A Vervaat-like path transformation for the re ected Brownian bridge conditioned on its local time transformation for the re ected Brownian bridge conditioned on its local time at 0: up to random shifts, this process equals the two processes constructed from a Brownian bridge and a Brownian excursion by adding

  10. On The Method of Precise Calculations Of Energy Levels of Hydrogen-like Atoms

    E-Print Network [OSTI]

    N. A. Boikova; Y. N. Tyukhtyaev; R. N. Faustov

    2003-11-22

    We describe a method for deriving logarithmic corrections in the mass ratio to the S-level of a hydrogen-like atom. With this method, a number of new corrections of this type are calculated analitically for the first time.

  11. Synthesis of flower-like Boehmite (AlOOH) via a simple solvothermal process without surfactant

    SciTech Connect (OSTI)

    Li, Guangci; Liu, Yunqi; Liu, Di; Liu, Lihua; Liu, Chenguang

    2010-10-15

    Boehmite (AlOOH) with hierarchical flower-like structures was synthesized by the solvothermal reaction of AlCl{sub 3}.6H{sub 2}O in the presence of ethanol and toluene at 200 {sup o}C for 24 h. The product was characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results show that boehmite with flower-like nanostructures, which aggregated together by the weak hydrogen bonds, was formed through dissolution-deposition process of boehmite microcrystals and the toluene has a great effect on the morphology of product in the reaction system. Meanwhile, the {gamma}-Al{sub 2}O{sub 3} was also obtained by calcination of above product at 500 {sup o}C for 2 h, and the flower-like morphology kept no change. The surface area of {gamma}-Al{sub 2}O{sub 3} powder was determined to be 166.8 m{sup 2}/g by N{sub 2} adsorption measurement. The possible formation mechanism of flower-like boehmite nanostructures was proposed and discussed.

  12. Optical apparatus for conversion of whispering-gallery modes into a free space gaussian like beam

    DOE Patents [OSTI]

    Stallard, B.W.; Makowski, M.A.; Byers, J.A.

    1992-05-19

    An optical converter for efficient conversion of millimeter wavelength whispering-gallery gyrotron output into a linearly polarized, free-space Gaussian-like beam is described. The converter uses a mode-converting taper and three mirror optics. The first mirror has an azimuthal tilt to eliminate the k[sub [phi

  13. Phenothiazines Inhibit Hepatitis C Virus Entry, Likely by Increasing the Fluidity of Cholesterol-Rich Membranes

    E-Print Network [OSTI]

    Phenothiazines Inhibit Hepatitis C Virus Entry, Likely by Increasing the Fluidity of Cholesterol hepatitis C virus (HCV), more effective therapies are still urgently needed. We and others previously inhibitors. Hepatitis C virus (HCV) infects at least 130 million people worldwide and is the major cause

  14. Study: Among Street-Involved Youth, Women Twice as Likely to be Infected with Hepatitis C

    E-Print Network [OSTI]

    Kavanagh, Karen L.

    Study: Among Street-Involved Youth, Women Twice as Likely to be Infected with Hepatitis C Vancouver the hepatitis C virus (HCV), according to a new study by the BC Centre for Excellence in HIV/AIDS (BC surveillance data, on a national scale, men have higher rates of hepatitis C diagnosis than women (36.8 per 100

  15. Structure of the hepatitis E virus-like particle suggests mechanisms for virus assembly

    E-Print Network [OSTI]

    Tao, Yizhi Jane

    Structure of the hepatitis E virus-like particle suggests mechanisms for virus assembly (received for review May 1, 2009) Hepatitis E virus (HEV), a small, non-enveloped RNA virus in the family Hepeviridae, is associated with endemic and epidemic acute viral hepatitis in developing countries. Our 3.5-Å

  16. Implementing Bubblegrams: The Use of Haar-Like Features for Human-Robot

    E-Print Network [OSTI]

    Implementing Bubblegrams: The Use of Haar-Like Features for Human-Robot Interaction James E. Young Email: {jyoung;ehud;boyd}@cpsc.ucalgary.ca Abstract-- Bubblegrams - a human-robot interaction (HRI) technique - uses Mixed Reality (MR) to allow collocated hu- mans and robots to interact directly by visually

  17. Some Like it Hot? Thermal Feedback for Mobile Devices Graham Wilson, Martin Halvey, Stephen A. Brewster

    E-Print Network [OSTI]

    Brewster, Stephen

    perception and this is not the focus of this paper. Fundamental HCI research needs to be conducted we focus on in this paper. There are many potential uses for thermal feedback; the following usageSome Like it Hot? Thermal Feedback for Mobile Devices Graham Wilson, Martin Halvey, Stephen A

  18. CONGRESSIONAL RECORD --SENATES9468 September 19, 2001 Meanwhile, it is likely that there could be

    E-Print Network [OSTI]

    Bernstein, Daniel

    Currently, supply does not seem to be an issue. There is a downward trend in the price of distillates, likely due to the glut of jet fuel. Gasoline is moving upward but cer- tainly not abnormally. If there is a move from air travel to travel by car, that would seem to encourage an increase in gasoline. If however

  19. DETECTION OF IMPULSE-LIKE AIRBORNE SOUND FOR DAMAGE IDENTIFICATION IN ROTOR BLADES OF WIND TURBINES

    E-Print Network [OSTI]

    Boyer, Edmond

    DETECTION OF IMPULSE-LIKE AIRBORNE SOUND FOR DAMAGE IDENTIFICATION IN ROTOR BLADES OF WIND TURBINES burdens of wind turbines. To detect damage of rotor blades, several research projects focus on an acoustic, rotor blade, wind turbine INTRODUCTION There are several publications of non destructive damage

  20. A Coarse-Grained Protein Model in a Water-like Solvent

    E-Print Network [OSTI]

    Buldyrev, Sergey

    A Coarse-Grained Protein Model in a Water-like Solvent Sumit Sharma1 *, Sanat K. Kumar1 , Sergey V an explicit atom description of proteins in solvent can be computationally expensive. On the other hand, coarse-grained protein models in implicit solvent miss essential features of the hydrophobic effect

  1. The habitability and detection of Earth-like planets orbiting cool white L. Fossati1

    E-Print Network [OSTI]

    The habitability and detection of Earth-like planets orbiting cool white dwarfs. L. Fossati1 orbiting white dwarfs. As a white dwarf cools from 6000 K to 4000 K, a planet orbiting at 0.01 AU would with the persistence of complex life. Po- larisation due to a terrestrial planet in the CHZ of a cool white dwarf

  2. http://www.markelowitz.com/exobiology.htm The Search for Earth-like

    E-Print Network [OSTI]

    Walter, Frederick M.

    planets at hot Jupiters - massive gas giants close to the star (but cool around M dwarfs). A few planetaryhttp://www.markelowitz.com/exobiology.htm #12;The Search for Earth-like Planets ·0.95m telescope;Kepler Planets #12;Kepler Planet Summary · As of 10/1/2011 · 1235 planet candidates · 25 confirmed

  3. Ntru-like Public Key Cryptosystems beyond Dedekind Domain Up to Alternative Algebra

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Ntr¯u-like Public Key Cryptosystems beyond Dedekind Domain Up to Alternative Algebra Ehsan Malekian) as well as non-associative Octonions (a power-associative and alternative algebra of dimension eight over: Public Key Cryptography, Ntr¯u, Alternative algebra, lattice based cryptogra- phy, non

  4. Android as a Telecommunication Medium with a Human-like Presence

    E-Print Network [OSTI]

    Kanda, Takayuki

    Android as a Telecommunication Medium with a Human-like Presence Daisuke Sakamoto1&2 , Takayuki, we realize human telepresence by developing a remote-controlled android system called Geminoid HI-1 the android than when he appeared on a video monitor in a video conference system. In addition, participants

  5. PRINT CHARACTERS LIKE THIS CORRECT INCORRECT Consent to Request Consumer Report & Investigative Consumer Report Information

    E-Print Network [OSTI]

    New Mexico, University of

    (FACIS®) Office of Inspector General Sanctions (OIG) Other Please List: I acknowledge receiptPRINT CHARACTERS LIKE THIS CORRECT INCORRECT Consent to Request Consumer Report & Investigative Consumer Report Information Applicant's First Name or Initial Last Name I understand that The University

  6. Improved recognition of native-like protein structures using a family of designed sequences

    E-Print Network [OSTI]

    Koehl, Patrice

    Improved recognition of native-like protein structures using a family of designed sequences Patrice on computational protein design. The model structure is used as input to design a family of low free energy Koehl* and Michael Levitt Department of Structural Biology, Fairchild Building, Stanford University

  7. Method for removing adhering or dust-like deposits in systems handling uranium hexafluoride

    SciTech Connect (OSTI)

    Bacher, W.; Jacob, E.

    1984-02-28

    A process is claimed for removing adhering or dust-like deposits in an apparatus which handles uranium hexafluoride. The process includes the steps of: (a) reacting the deposits with a gaseous boron halogenide other than boron trifluoride, to form at least one uranium halogenide; and (b) reacting the at least one uranium halogenide with a fluorine containing substance to form uranium hexafluoride.

  8. ACCELERATED COMMUNICATION Aspects of Dioxin Toxicity Are Mediated by Interleukin 1-Like

    E-Print Network [OSTI]

    Bradfield, Christopher A.

    ACCELERATED COMMUNICATION Aspects of Dioxin Toxicity Are Mediated by Interleukin 1-Like Cytokines, 2005 ABSTRACT Exposure to 2,3,7,8-tetrachlorodibenzo-p-dioxin (dioxin) re- sults in a broad spectrum of toxic effects. Most, if not all, of these responses are dependent upon the binding of dioxin to the aryl

  9. Exciton-like trap states limit electron mobility in TiO2 nanotubes

    E-Print Network [OSTI]

    Exciton-like trap states limit electron mobility in TiO2 nanotubes Christiaan Richter and Charles A , that low mobility in polycrystalline TiO2 nanotubes is not due to scattering from grain boundaries (electrons) be transported through an anodic TiO2 electrode, either along the length of nanotubes in the case

  10. High surface area diamond-like carbon electrodes grown on vertically aligned carbon nanotubes

    E-Print Network [OSTI]

    Bristol, University of

    High surface area diamond-like carbon electrodes grown on vertically aligned carbon nanotubes H packed forests of vertically aligned multiwall carbon nanotubes (VACNTs). The DLC:VACNT composite film and high corrosion resistance [13,14]. Other type of dopants, including nickel and boron, also result

  11. Origami-like Folded MEMS for Realization of TIMU: Fabrication Technology and Initial

    E-Print Network [OSTI]

    Chen, Zhongping

    single-axis sensors and then folding them into a 3-D Fig. 1. Commercial MEMS IMUs Performance Fig. 2 for assembly of the integrated MEMS sensor cluster in a 3-D configuration, or folding in a 3-D shape. FoldedOrigami-like Folded MEMS for Realization of TIMU: Fabrication Technology and Initial Demonstration

  12. Wrinkle development analysis in thin sail-like structures using MITC shell finite elements

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Wrinkle development analysis in thin sail-like structures using MITC shell finite elements D submitted to Finite Elements in Analysis and Design September 20, 2012 hal-00733994,version1-20Sep2012 Author manuscript, published in "Finite Elements in Analysis and Design 64 (2013) 48-64" DOI : 10.1016/j

  13. Further Evidences for Spin Glass like behavior in NiO nanoparticles

    E-Print Network [OSTI]

    S. D. Tiwari; K. P. Rajeev

    2004-08-26

    Nickel oxide nanoparticles are prepared by a sol gel method and characterized by x-ray diffraction and transmission electron microscope. Here we present measurements on temperature and field dependence of magnetization and time dependence of thermoremanent magnetization. Our conclusion based on these measurements is that the system shows spin glass like behavior.

  14. The Challenges of Hardware Synthesis from C-like Languages Stephen A. Edwards

    E-Print Network [OSTI]

    The Challenges of Hardware Synthesis from C-like Languages Stephen A. Edwards Department of integrated circuits we can fabricate imposes a continuing need for ways to de- scribe complex hardware as specification languages for digital hardware. Yet, tools based on this idea have seen little commercial interest

  15. Microfluidic Assembly of Janus-Like Dimer Capsules Annie Xi Lu,

    E-Print Network [OSTI]

    Raghavan, Srinivasa

    . Microscale aqueous droplets bearing the biopolymer chitosan are generated in situ within a chip and rotation in an external rotating magnetic field, much like a magnetic stir bar. The overall approach magnetic chains of microparticles.3 However, the process used to make the chains required manual

  16. Making Search Efficient on Gnutella-like P2P Systems Department of ECECS

    E-Print Network [OSTI]

    Zhu, Yingwu "Jason"

    and document indices due to node churn in P2P networks. For example, the churn rate of coming and going nodes]. Node churn complicates the task of search on structured P2P networks. First, each node failure requires and effectively. However, node churn causes little problem for Gnutella- like P2P systems because such systems

  17. Testing minimal lepton flavor violation with extra vector-like leptons at the LHC

    E-Print Network [OSTI]

    Eilam Gross; Daniel Grossman; Yosef Nir; Ofer Vitells

    2010-01-17

    Models of minimal lepton flavor violation where the seesaw scale is higher than the relevant flavor scale predict that all lepton flavor violation is proportional to the charged lepton Yukawa matrix. If extra vector-like leptons are within the reach of the LHC, it will be possible to test the resulting predictions in ATLAS/CMS.

  18. Excitation energies and transition rates in the 3d2 states of Ca-like ions

    E-Print Network [OSTI]

    Johnson, Walter R.

    Excitation energies and transition rates in the 3d2 states of Ca-like ions U. I. Safronova,1 W. R October 2000; published 14 February 2001 Energies, transition probabilities, and lifetimes are calculated matrix elements. The resulting transition energies and lifetimes are compared with experimental values

  19. Using Groupings of Static Analysis Alerts to Identify Files Likely to Contain Field Failures

    E-Print Network [OSTI]

    Sherriff, Mark S.

    of a field failure. Our technique uses singular value decomposition to generate groupings of static analysisUsing Groupings of Static Analysis Alerts to Identify Files Likely to Contain Field Failures Mark S@csc.ncsu.edu ABSTRACT In this paper, we propose a technique for leveraging historical field failure records

  20. The Threading Program of PAINT PAINT is a PAirwise INteraction based Threading algorithm like RAPTOR(1).

    E-Print Network [OSTI]

    Zhang, Yang

    1 The Threading Program of PAINT PAINT is a PAirwise INteraction based Threading algorithm like between cores of proteins, and gap penalty are considered in PAINT. The score function of PAINT function and can be solved by integer linear programming. In PAINT, the structure of a protein is composed

  1. Frosh senator ignores `Rubio for VP' push Tea partyers, establishment like what they see in young

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Frosh senator ignores `Rubio for VP' push Tea partyers, establishment like what they see in young the dapper, articulate and ambitious Miami native -- who is admired by tea party activists and the party] is somebody that is beloved by the tea party who holds statewide office in a swing state and, oh, is Hispanic

  2. Evolution of modular intraflagellar transport from a coatomer-like progenitor

    E-Print Network [OSTI]

    Sali, Andrej

    Evolution of modular intraflagellar transport from a coatomer-like progenitor Teunis J. P. van Dama of Pharmaceutical Chemistry, and e California Institute for Quantitative Biosciences, University of California, San Francisco, CA 94158 Edited by Russell F. Doolittle, University of California at San Diego, La Jolla, CA

  3. Structural Basis of Viral RNA Recognition by RIG-I-Like Receptors 

    E-Print Network [OSTI]

    Lu, Cheng

    2012-10-19

    RIG-I-like receptors (RLRs), RIG-I, MDA5, and LGP2, are a family of innate immune receptors that recognize viral RNA in the cytoplasm and initiate antiviral responses including the induction of type I interferons and other ...

  4. CARBON SEQUESTRATION IN ARABLE SOILS IS LIKELY TO INCREASE NITROUS OXIDE EMISSIONS, OFFSETTING

    E-Print Network [OSTI]

    CARBON SEQUESTRATION IN ARABLE SOILS IS LIKELY TO INCREASE NITROUS OXIDE EMISSIONS, OFFSETTING in strategies for climate protection. 1. Introduction Carbon sequestration has been highlighted recently concentration of carbon dioxide (CO2) in the atmo- sphere include sequestering carbon (C) in soils

  5. Adding an energy-like conservation law to the leapfrog integrator

    E-Print Network [OSTI]

    A. C. Maggs

    2013-01-09

    The leapfrog integrator is widely used because of its excellent stability in molecular dynamics simulation. This is recognized as being due to the existence of a discrete variational structure of the equations. We introduce a modified leapfrog method which includes an additional energy-like conservation law by embedding a molecular dynamics simulation within a larger dynamical system.

  6. Theoretical Treatment of the Thermophysical Properties of Fluids Containing Chain-like Molecules

    SciTech Connect (OSTI)

    Carol K. Hall

    2008-11-14

    This research program was designed to enhance our understanding of the behavior of fluids and fluid mixtures containing chain-like molecules. The original objective was to explain and predict the experimentally observed thermophysical properties, including phase equilibria and dynamics, of systems containing long flexible molecules ranging in length from alkanes to polymers. Over the years the objectives were expanded to include the treatment of molecules that were not chain-like. Molecular dynamics and Monte Carlo computer simulations were used to investigate how variations in molecular size, shape and architecture influence the types of phase equilibria, thermodynamic properties, structure and surface interactions that are observed experimentally. The molecular insights and theories resulting from this program could eventually serve as the foundation upon which to build correlations of the properties of fluids that are both directly and indirectly related to the Nation’s energy resources including: petroleum, natural gas, and polymer solutions, melts, blends, and materials.

  7. Interpretation of Vector-like Quark Searches: Heavy Gluons in Composite Higgs Models

    E-Print Network [OSTI]

    Juan Pedro Araque; Nuno Filipe Castro; Jose Santiago

    2015-07-20

    Pair production of new vector-like quarks in pp collisions is considered model independent as it is usually dominated by QCD production. We discuss the interpretation of vector-like quark searches in the case that QCD is not the only relevant production mechanism for the new quarks. In particular we consider the effect of a new massive color octet vector boson with sizeable decay branching ratio into the new quarks. We pay special attention to the sensitivity of the Large Hadron Collider experiments, both in run-1 and early run-2, to differences in the kinematical distributions from the different production mechanisms. We have found that even though there can be significant differences in some kinematical distributions at the parton level, the differences are washed out at the reconstruction level. Thus, the published experimental results can be reinterpreted in models with heavy gluons by simply rescaling the production cross section.

  8. Pseudoscalar Portal Dark Matter and New Signatures of Vector-like Fermions

    E-Print Network [OSTI]

    JiJi Fan; Savvas M. Koushiappas; Greg Landsberg

    2015-07-24

    Fermionic dark matter interacting with the Standard Model sector through a pseudoscalar portal could evade the direct detection constraints while preserving a WIMP miracle. We study the LHC constraints on the pseudoscalar production in simplified models with the pseudoscalar either dominantly coupled to b quarks or tau leptons and explore their implications for the GeV excesses in gamma ray observations. We also investigate models with new vector-like fermions that could realize the simplified models of pseudoscalar portal dark matter. These models yield new decay channels and signatures of vector-like fermions, for instance, bbb, btautau, and tautautau resonances. Some of the signatures have already been strongly constrained by the existing LHC searches and the parameter space fitting the gamma ray excess is further restricted. On the other hand, the pure tau-rich final state is only weakly constrained so far due to the small electroweak production rate.

  9. Ultrafast field control of symmetry, reciprocity, and reversibility in buckled graphene-like materials

    E-Print Network [OSTI]

    Kelardeh, Hamed Koochaki; Stockman, Mark I

    2015-01-01

    We theoretically show that buckled two-dimensional graphene-like materials (silicene and germanene) subjected to a femtosecond strong optical pulse can be controlled by the optical field component normal to their plane. In such strong fields, these materials are predicted to exhibit non-reciprocal reflection, optical rectification and generation of electric currents both parallel and normal to the in-plane field direction. Reversibility of the conduction band population is also field- and carrier-envelope phase controllable. There is a net charge transfer along the material plane that is also dependent on the normal field component. Thus a graphene-like buckled material behaves analogously to a field-effect transistor controlled and driven by the electric field of light with subcycle (femtosecond) speed.

  10. Electromagnetially-induced-transparency-like ground-state cooling in a double-cavity optomechanical system

    E-Print Network [OSTI]

    Yujie Guo; Kai Li; Wenjie Nie; Yong Li

    2014-07-19

    We propose to cool a mechanical resonator close to its ground state via an electromagnetically-induced-transparency- (EIT-) like cooling mechanism in a double-cavity optomechanical system, where an additional cavity couples to the original one in the standard optomechanical system. By choosing optimal parameters such that the cooling process of the mechanical resonator corresponds to the maximum value of the optical fluctuation spectrum and the heating process to the minimum one, the mechanical resonator can be cooled with the final mean phonon number less than that at the absence of the additional cavity. And we show the mechanical resonator may be cooled close to its ground state via such an EIT-like cooling mechanism even when the original resolved sideband condition is not fulfilled at the absence of the additional cavity.

  11. Electron structure, Zitterbewegung, and the new non-linear Dirac-like equation

    E-Print Network [OSTI]

    M. Pavsic; Erasmo Recami; W. A. Rodrigues Jr

    1998-03-14

    The recent literature shows a renewed interest, with various independent approaches, in the classical theories for spin. Considering the possible interest of those results, at least for the electron case, we purpose in this paper to explore their physical and mathematical meaning, by the natural and powerful language of Clifford algebras (which, incidentally, will allow us to unify those different approaches). In such theories, the ordinary electron is in general associated to the mean motion of a point-like "constituent" Q, whose trajectory is a cylindrical helix. We find, in particular, that the object Q obeys a new, non-linear Dirac-like equation, such that --when averaging over an internal cycle (which corresponds to linearization)-- it transforms into the ordinary Dirac equation (valid for the electron as a whole).

  12. LPM Interference and Cherenkov-like Gluon Bremsstrahlung in DenseMatter

    SciTech Connect (OSTI)

    Majumder, Abhijit; Wang, Xin-Nian

    2005-07-26

    Gluon bremsstrahlung induced by multiple parton scattering in a finite dense medium has a unique angular distribution with respect to the initial parton direction. A dead-cone structure with an opening angle; theta2{sub 0}; approx 2(1-z)/(zLE) for gluons with fractional energy z arises from the Landau-Pomeran chuck-Migdal (LPM) interference. In a medium where the gluon's dielectric constant is; epsilon>1, the LPM interference pattern is shown to become Cherenkov-like with an increased opening angle determined by the dielectric constant$/cos2/theta{sub c}=z+(1-z)//epsilon$. For a large dielectric constant/epsilon; gg 1+2/z2LE, the corresponding total radiative parton energy loss is about twice that from normal gluon bremsstrahlung. Implications of this Cherenkov-like gluon bremsstrahlung to the jet correlation pattern in high-energy heavy-ion collisions is discussed.

  13. Cloning and expression of autogenes encoding RNA polymerases of T7-like bacteriophages

    DOE Patents [OSTI]

    Studier, F.W.; Dubendorff, J.W.

    1998-10-20

    This invention relates to the cloning and expression of autogenes encoding RNA polymerases of T7 and T7-like bacteriophages, in which the RNA polymerase gene is transcribed from a promoter which is recognized by the encoded RNA polymerase. Cloning of T7 autogenes was achieved by reducing the activity of the RNA polymerase sufficiently to permit host cell growth. T7 RNA polymerase activity was controlled by combining two independent methods: lac-repression of the recombinant lac operator-T7 promoter in the autogene and inhibition of the polymerase by T7 lysozyme. Expression systems for producing the RNA polymerases of T7 and other T7-like bacteriophages, and expression systems for producing selected gene products are described, as well as other related materials and methods. 12 figs.

  14. Cloning and expression of autogenes encoding RNA polymerases of T7-like bacteriophages

    DOE Patents [OSTI]

    Studier, F.W.; Dubendorff, J.W.

    1998-11-03

    This invention relates to the cloning and expression of autogenes encoding RNA polymerases of T7 and T7-like bacteriophages, in which the RNA polymerase gene is transcribed from a promoter which is recognized by the encoded RNA polymerase. Cloning of T7 autogenes was achieved by reducing the activity of the RNA polymerase sufficiently to permit host cell growth. T7 RNA polymerase activity was controlled by combining two independent methods: lac-repression of the recombinant lac operator-T7 promoter in the autogene and inhibition of the polymerase by T7 lysozyme. Expression systems for producing the RNA polymerases of T7 and other T7-like bacteriophages, and expression systems for producing selected gene products are described, as well as other related materials and methods. 12 figs.

  15. A geometric approach to quantum control in a classical-like framework

    E-Print Network [OSTI]

    Davide Pastorello

    2015-08-28

    A quantum theory in a finite-dimensional Hilbert space can be formulated as a proper Hamiltonian theory as explained in [2, 3, 7, 8]. From this point of view a quantum system can be described in a classical-like framework where quantum dynamics is represented by a Hamiltonian flow in the phase space given by Hilbert projective space. This paper is devoted to investigate how the notion of accessibility algebra from classical control theory can be applied within geometric classical-like formulation of Quanum Mechanics to study controllability of a quantum system in order to state the following conjecture: Under certain conditions, classical control theory provides a machinery which can be directly applied in quantum control within the geometric Hamiltonian picture.

  16. AN ENIGMATIC POINT-LIKE FEATURE WITHIN THE HD 169142 TRANSITIONAL DISK ,

    SciTech Connect (OSTI)

    Biller, Beth A.; Males, Jared; Morzinski, Katie; Close, Laird M.; Follette, Katherine B.; Hinz, Philip M.; Rodigas, Timothy; Weinberger, Alycia; Juhász, Attila; Lacour, Sylvestre; Henning, Thomas; Pott, Jörg-Uwe; Köhler, Rainer; Bonnefoy, Mickaël

    2014-09-01

    We report the detection of a faint point-like feature possibly related to ongoing planet-formation in the disk of the transition disk star HD 169142. The point-like feature has a ?mag(L) ? 6.4, at a separation of ?0.''11 and position angle ?0°. Given its lack of an H or K{sub S} counterpart despite its relative brightness, this candidate cannot be explained by purely photospheric emission and must be a disk feature heated by an as yet unknown source. Its extremely red colors make it highly unlikely to be a background object, but future multi-wavelength follow up is necessary for confirmation and characterization of this feature.

  17. Distinguishing a SM-like MSSM Higgs boson from SM Higgs boson at muon collider

    E-Print Network [OSTI]

    Jai Kumar Singhal; Sardar Singh; Ashok K Nagawat

    2005-07-26

    We explore the possibility of distinguishing the SM-like MSSM Higgs boson from the SM Higgs boson via Higgs boson pair production at future muon collider. We study the behavior of the production cross section in SM and MSSM with Higgs boson mass for various choices of MSSM parameters tan \\beta and m\\sub A. We observe that at fixed CM energy, in the SM, the total cross section increases with the increase in Higgs boson mass whereas this trend is reversed for the MSSM case. The changes that occur for the MSSM case in comparison to the SM predictions are quantified in terms of the relative percentage deviation in cross section. The observed large deviations in cross section for different choices of Higgs mass suggest that the measurements of the cross section could possibly distinguish the SM-like MSSM Higgs boson from the SM Higgs boson.

  18. 3D climate modeling of Earth-like extrasolar planets orbiting different types of host stars

    E-Print Network [OSTI]

    Godolt, M; Hamann-Reinus, A; Kitzmann, D; Kunze, M; Langematz, U; von Paris, P; Patzer, A B C; Rauer, H; Stracke, B

    2015-01-01

    The potential habitability of a terrestrial planet is usually defined by the possible existence of liquid water on its surface. The potential presence of liquid water depends on many factors such as, most importantly, surface temperatures. The properties of the planetary atmosphere and its interaction with the radiative energy provided by the planet's host star are thereby of decisive importance. In this study we investigate the influence of different main-sequence stars upon the climate of Earth-like extrasolar planets and their potential habitability by applying a 3D Earth climate model accounting for local and dynamical processes. The calculations have been performed for planets with Earth-like atmospheres at orbital distances where the total amount of energy received from the various host stars equals the solar constant. In contrast to previous 3D modeling studies, we include the effect of ozone radiative heating upon the vertical temperature structure of the atmospheres. The global orbital mean results o...

  19. MAGNETIC BRAKING FORMULATION FOR SUN-LIKE STARS: DEPENDENCE ON DIPOLE FIELD STRENGTH AND ROTATION RATE

    SciTech Connect (OSTI)

    Matt, Sean P.; Pinsonneault, Marc H.; Greene, Thomas P. E-mail: kmac@ucar.edu E-mail: thomas.p.greene@nasa.gov

    2012-08-01

    We use two-dimensional axisymmetric magnetohydrodynamic simulations to compute steady-state solutions for solar-like stellar winds from rotating stars with dipolar magnetic fields. Our parameter study includes 50 simulations covering a wide range of relative magnetic field strengths and rotation rates, extending from the slow- and approaching the fast-magnetic-rotator regimes. Using the simulations to compute the angular momentum loss, we derive a semi-analytic formulation for the external torque on the star that fits all of the simulations to a precision of a few percent. This formula provides a simple method for computing the magnetic braking of Sun-like stars due to magnetized stellar winds, which properly includes the dependence on the strength of the magnetic field, mass loss rate, stellar radius, surface gravity, and spin rate, and which is valid for both slow and fast rotators.

  20. Plasma spraying method for forming diamond and diamond-like coatings

    DOE Patents [OSTI]

    Holcombe, Cressie E. (Farragut, TN); Seals, Roland D. (Oak Ridge, TN); Price, R. Eugene (Knoxville, TN)

    1997-01-01

    A method and composition for the deposition of a thick layer (10) of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition (12) including at least glassy carbon is heated in a direct current plasma arc device to a selected temperature above the softening point, in an inert atmosphere, and is propelled to quickly quenched on a selected substrate (20). The softened or molten composition (18) crystallizes on the substrate (20) to form a thick deposition layer (10) comprising at least a diamond or diamond-like material. The selected composition (12) includes at least glassy carbon as a primary constituent (14) and may include at least one secondary constituent (16). Preferably, the secondary constituents (16) are selected from the group consisting of at least diamond powder, boron carbide (B.sub.4 C) powder and mixtures thereof.

  1. Plasma spraying method for forming diamond and diamond-like coatings

    DOE Patents [OSTI]

    Holcombe, C.E.; Seals, R.D.; Price, R.E.

    1997-06-03

    A method and composition is disclosed for the deposition of a thick layer of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition including at least glassy carbon is heated in a direct current plasma arc device to a selected temperature above the softening point, in an inert atmosphere, and is propelled to quickly quenched on a selected substrate. The softened or molten composition crystallizes on the substrate to form a thick deposition layer comprising at least a diamond or diamond-like material. The selected composition includes at least glassy carbon as a primary constituent and may include at least one secondary constituent. Preferably, the secondary constituents are selected from the group consisting of at least diamond powder, boron carbide (B{sub 4}C) powder and mixtures thereof. 9 figs.

  2. Optical limiting and bleaching effects in a suspension of onion-like carbon

    SciTech Connect (OSTI)

    Mikheev, Gen M; Bulatov, D L; Mogileva, T N; Kuznetsov, V L; Moseenkov, S I; Ishchenko, A V

    2009-04-30

    We have studied the effect of nanosecond laser pulses ({lambda} = 1064 nm) on the optical properties of onion-like carbon (OLC) prepared by high-temperature vacuum annealing of detonation nanodiamond and dispersed in N,N-dimethylformamide (DMF). The results demonstrate that, under low-intensity irradiation, the OLC suspension displays optical limiting behaviour. Increasing the incident intensity leads to bleaching of the suspension in the visible and near-IR spectral regions. (nanostructures)

  3. Measurement of electron neutrino quasielastic and quasielastic-like scattering on hydrocarbon at $\\langle E_{\

    E-Print Network [OSTI]

    Wolcott, J; Bellantoni, L; Bercellie, A; Betancourt, M; Bodek, A; Bravar, A; Budd, H; Carneiro, M F; Chvojka, J; da Motta, H; Devan, J; Dytman, S A; Diaz, G A; Eberly, B; Felix, J; Fields, L; Fine, R; Galindo, R; Gallagher, H; Ghosh, A; Golan, T; Gran, R; Harris, D A; Higuera, A; Kiveni, M; Kleykamp, J; Kordosky, M; Le, T; Maher, E; Manly, S; Mann, W A; Marshall, C M; Caicedo, D A Martinez; McFarland, K S; McGivern, C L; McGowan, A M; Messerly, B; Miller, J; Mislivec, A; Morfin, J G; Mousseau, J; Muhlbeier, T; Naples, D; Nelson, J K; Norrick, A; Osta, J; Paolone, V; Park, J; Patrick, C E; Perdue, G N; Rakotondravohitra, L; Ransome, R D; Ray, H; Ren, L; Rimal, D; Rodrigues, P A; Ruterbories, D; Schellman, H; Schmitz, D W; Salinas, C J Solano; Tagg, N; Tice, B G; Valencia, E; Walton, T; Wospakrik, M; Zavala, G; Zhang, D; Ziemer, B P

    2015-01-01

    The first direct measurement of electron-neutrino quasielastic and quasielastic-like scattering on hydrocarbon in the few-GeV region of incident neutrino energy has been carried out using the MINERvA detector in the NuMI beam at Fermilab. The flux-integrated differential cross sections in electron production angle, electron energy and $Q^{2}$ are presented. The ratio of the quasielastic, flux-integrated differential cross section in $Q^{2}$ for $\

  4. GREEK LETTERS Learn the names of Greek letters not just the obvious ones like alpha,

    E-Print Network [OSTI]

    Lozano-Robledo, Alvaro

    GREEK LETTERS Learn the names of Greek letters ­ not just the obvious ones like alpha, beta, and pi A ´ (alpha) a B ´ (beta) b ´µµ (gamma) g ´ (delta) d E ´o (epsilon) e Z ´ (zeta) z H ´ (eta) ee ´ (theta atom ´o book ´o basic Bo ´ Boston µ´ geometry ´ language ´ French µo´ democracy ´o tooth ´ energy E

  5. Thermodynamics of the Three-dimensional Black Hole with a Coulomb-like Field

    E-Print Network [OSTI]

    Alexis Larranaga; Luz Angela Garcia

    2008-11-21

    In this paper, we study the thermodynamical properties of the (2+1)dimensional black hole with a Coulomb-like electric field and the differential form of the first law of thermodynamics is derived considering a virtual displacement of its event horizon. This approach shows that it is possible to give a thermodynamical interpretation to the field equations near the horizon. The Lambda=0 solution is studied and its interesting thermodynamical properties are commented.

  6. The Sun-like activity of the solar twin 18 Scorpii

    E-Print Network [OSTI]

    Jeffrey C. Hall; Gregory W. Henry; G. Wesley Lockwood

    2007-03-16

    We present the results of 10 yr of complementary spectroscopic and photometric observations of the solar twin 18 Scorpii. We show that over the course of its ~7 year chromospheric activity cycle, 18 Sco's brightness varies in the same manner as the Sun's and with a likely brightness variation of 0.09%, similar to the 0.1% decadal variation in the total solar irradiance.

  7. Relativistic configuration-interaction calculation of $K\\alpha$ transition energies in beryllium-like argon

    E-Print Network [OSTI]

    Yerokhin, V A; Fritzsche, S

    2014-01-01

    Relativistic configuration-interaction calculations have been performed for the energy levels of the low-lying and core-excited states of beryllium-like argon, Ar$^{14+}$. These calculations include the one-loop QED effects as obtained by two different methods, the screening-potential approach as well as the model QED operator approach. The calculations are supplemented by a systematic estimation of uncertainties of theoretical predictions.

  8. NATURAL GAS FROM SHALE: Questions and Answers It Seems Like Shale Gas Came Out

    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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested Parties -Department of EnergyNEW YORK STATENASA EnhancedIt Seems Like

  9. A Study of Snake-like Locomotion Through the Analysis of a Flexible Robot Model

    E-Print Network [OSTI]

    Giancarlo Cicconofri; Antonio DeSimone

    2014-09-13

    We examine the problem of snake-like locomotion by studying a system consisting of a planar inextensible elastic rod that is able to control its spontaneous curvature. Using a Cosserat model we derive, through variational principles, the equations of motion for two special cases: one in which the system is confined inside a frictionless channel, and one in which it is placed in an anisotropic frictional environment, modeling the dynamical setting of the slithering of snakes on flat surfaces. The presence of constraints in both cases leads to non-standard boundary conditions, that allow us to close the equations of motion reducing them to a differential and an integro-differential equation, respectively, for one end point (the tail) of the active rod. For the snake-like case we also provide analytic solutions for a special class of motions. We highlight the role of the spontaneous curvature in the pushing (and the steering, in the snake-like setting) needed to power locomotion. Comparisons with available experiments confirm that the model is able to capture many of the essential findings in the zoological literature. The complete solvability and the existence of analytic solutions offers a tool that may prove valuable for the design of bio-inspired soft robots.

  10. Baryon Asymmetry and Dark Matter Through the Vector-Like Portal

    E-Print Network [OSTI]

    Pavel Fileviez Perez; Mark B. Wise

    2013-05-14

    A possible connection between the cosmological baryon asymmetry, dark matter and vector-like fermions is investigated. In this scenario an asymmetry generated through baryogenesis or leptogenesis (in the vector-like matter sector) connects the baryon asymmetry to the dark matter density. We present explicit renormalizable models where this connection occurs. These models have asymmetric dark matter and a significant invisible Higgs decay width to dark matter particles is possible. We refer to this type of scenario as the vector-like portal. In some asymmetric dark matter models there are potential naturalness issues for the low energy effective theory. We address that issue in the models we consider by starting with a Lagrangian that is the most general renormalizable one consistent with the gauge (and discrete) symmetries and showing the low energy effective theory automatically has the required form as a consequence of the symmetries of the full theory. We show that the mass of the dark matter candidate is predicted in these scenarios.

  11. Vapor-like liquid coexistence densities affect the extension of the critical point's influence zone

    E-Print Network [OSTI]

    Jose Luis Rivera; Homero Nicanor-Guzman; Roberto Guerra-Gonzalez

    2015-04-16

    The critical point affects the coexistence behavior of the vapor-liquid equilibrium densities. The length of the critical influence zone is under debate because for some properties, like shear viscosity, the extension is only a few degrees, while for others, such as the density order parameter, the critical influence zone range covers up to hundreds of degrees below the critical temperature. Here we show that for a simple molecular potential of ethane, the critical influence zone covers a wide zone of tens of degrees (below the critical temperature) down to a transition temperature, at which the apparent critical influence zone vanishes and the transition temperature can be predicted through a pressure analysis of the coexisting bulk liquid phase. The liquid phases within the apparent critical influence zone show low densities, making them behave internally like their corresponding vapor phases. Therefore, the experimentally observed wide extension of the critical influence zone is due to a vapor-like effect due to low bulk liquid phase densities.

  12. K-Shell Photoionization of B-like Oxygen (O$^{3+}$) Ions: Experiment and Theory

    E-Print Network [OSTI]

    McLaughlin, B M; Cubaynes, D; Shorman, M M Al; Guilbaud, S; Sakho, I; Blancard, C; Gharaibeh, M F

    2014-01-01

    Absolute cross sections for the {\\it K}-shell photoionization of boron-like (B-like) O$^{3+}$ ions were measured by employing the ion-photon merged-beam technique at the SOLEIL synchrotron-radiation facility in Saint-Aubin, France. High-resolution spectroscopy with E/$\\Delta$E $\\approx$ 5000 ($\\approx$ 110 meV, FWHM) was achieved with photon energy from 540 eV up to 600 eV. Several theoretical approaches, including R-Matrix, Multi-Configuration Dirac-Fock and Screening Constant by Unit Nuclear Charge were used to identify and characterize the strong 1s $\\rightarrow$ 2p and the weaker 1s $\\rightarrow$ 3p resonances observed in the {\\it K}-shell spectra of this ion. The trend of the integrated oscillator strength and autoionisation width (natural line width) of the strong $\\rm 1s \\rightarrow 2p$ resonances along the first few ions of the B-like sequence is discussed.

  13. Dynamical Heating Induced by Dwarf Planets on Cold Kuiper Belt-like Debris Disks

    E-Print Network [OSTI]

    Muñoz-Gutiérrez, Marco A; Reyes-Ruiz, Mauricio; Peimbert, Antonio

    2015-01-01

    With the use of long-term numerical simulations, we study the evolution and orbital behavior of cometary nuclei in cold Kuiper belt-like debris disks under the gravitational influence of dwarf planets (DPs); we carry out these simulations with and without the presence of a Neptune-like giant planet. This exploratory study shows that in the absence of a giant planet, 10 DPs are enough to induce strong radial and vertical heating on the orbits of belt particles. On the other hand, the presence of a giant planet close to the debris disk, acts as a stability agent reducing the radial and vertical heating. With enough DPs, even in the presence of a Neptune-like giant planet some radial heating remains; this heating grows steadily, re-filling resonances otherwise empty of cometary nuclei. Specifically for the solar system, this secular process seems to be able to provide material that, through resonant chaotic diffusion, increase the rate of new comets spiraling into the inner planetary system, but only if more tha...

  14. SOLAR MAGNETIZED TORNADOES: ROTATIONAL MOTION IN A TORNADO-LIKE PROMINENCE

    SciTech Connect (OSTI)

    Su, Yang; Veronig, Astrid; Temmer, Manuela; Vanninathan, Kamalam; Gömöry, Peter; Wang, Tongjiang; Gan, Weiqun; Li, YouPing

    2014-04-10

    Su et al. proposed a new explanation for filament formation and eruption, where filament barbs are rotating magnetic structures driven by underlying vortices on the surface. Such structures have been noticed as tornado-like prominences when they appear above the limb. They may play a key role as the source of plasma and twist in filaments. However, no observations have successfully distinguished rotational motion of the magnetic structures in tornado-like prominences from other motions such as oscillation and counter-streaming plasma flows. Here we report evidence of rotational motions in a tornado-like prominence. The spectroscopic observations in two coronal lines were obtained from a specifically designed Hinode/EIS observing program. The data revealed the existence of both cold and million-degree-hot plasma in the prominence leg, supporting the so-called prominence-corona transition region. The opposite velocities at the two sides of the prominence and their persistent time evolution, together with the periodic motions evident in SDO/AIA dark structures, indicate a rotational motion of both cold and hot plasma with a speed of ?5 km s{sup –1}.

  15. Superior Conductive Solid-like Electrolytes: Nanoconfining Liquids within the Hollow Structures

    SciTech Connect (OSTI)

    Zhang, Jinshui [ORNL; Bai, Ying [ORNL; Sun, Xiao-Guang [ORNL; Li, Yunchao [ORNL; Guo, Bingkun [ORNL; Chen, Jihua [ORNL; Veith, Gabriel M [ORNL; Hensley, Dale K [ORNL; Paranthaman, Mariappan Parans [ORNL; Goodenough, John B [University of Texas at Austin; Dai, Sheng [ORNL

    2015-01-01

    The growth and proliferation of lithium (Li) dendrites during cell recharge is unavoidable, which seriously hinders the development and application of rechargeable Li metal batteries. Solid electrolytes with robust mechanical modulus are regarded as a promising approach to overcome the dendrite problems. However, their room-temperature ionic conductivities are usually too low to reach the level required for normal battery operation. Here, a class of novel solid electrolytes with liquid-like room-temperature ionic conductivities (> 1 mS cm-1) has been successfully synthesized by taking advantage of the unique nanoarchitectures of hollow silica (HS) spheres to confine liquid electrolytes in hollow space to afford high conductivities. In a symmetric lithium/lithium cell, such kind of solid-like electrolytes demonstrates a robust performance against Li dendrite problems, well stabilizing the cell system from short circuiting in a long-time operation at current densities ranging from 0.16 to 0.32 mA cm-2. Moreover, the high flexibility and compatibility of HS nanoarchitectures, in principle, enables broad tunability to choose desired liquids for the fabrication of other kinds of solid-like electrolytes, such as those containing Na+, Mg2+ or Al3+ as conductive media, providing a useful alternative strategy for the development of next generation rechargeable batteries.

  16. Who Will More Likely Buy PHEV: A Detailed Market Segmentation Analysis

    SciTech Connect (OSTI)

    Lin, Zhenhong [ORNL] [ORNL; Greene, David L [ORNL] [ORNL

    2010-01-01

    Understanding the diverse PHEV purchase behaviors among prospective new car buyers is key for designing efficient and effective policies for promoting new energy vehicle technologies. The ORNL MA3T model developed for the U.S. Department of Energy is described and used to project PHEV purchase probabilities by different consumers. MA3T disaggregates the U.S. household vehicle market into 1458 consumer segments based on region, residential area, driver type, technology attitude, home charging availability and work charging availability and is calibrated to the EIA s Annual Energy Outlook. Simulation results from MA3T are used to identify the more likely PHEV buyers and provide explanations. It is observed that consumers who have home charging, drive more frequently and live in urban area are more likely to buy a PHEV. Early adopters are projected to be more likely PHEV buyers in the early market, but the PHEV purchase probability by the late majority consumer can increase over time when PHEV gradually becomes a familiar product. Copyright Form of EVS25.

  17. The Notch ligand Delta-like 1 integrates inputs from TGFbeta/Activin and Wnt pathways

    SciTech Connect (OSTI)

    Bordonaro, Michael Tewari, Shruti Atamna, Wafa Lazarova, Darina L.

    2011-06-10

    Unlike the well-characterized nuclear function of the Notch intracellular domain, it has been difficult to identify a nuclear role for the ligands of Notch. Here we provide evidence for the nuclear function of the Notch ligand Delta-like 1 in colon cancer (CC) cells exposed to butyrate. We demonstrate that the intracellular domain of Delta-like 1 (Dll1icd) augments the activity of Wnt signaling-dependent reporters and that of the promoter of the connective tissue growth factor (CTGF) gene. Data suggest that Dll1icd upregulates CTGF promoter activity through both direct and indirect mechanisms. The direct mechanism is supported by co-immunoprecipitation of endogenous Smad2/3 proteins and Dll1 and by chromatin immunoprecipitation analyses that revealed the occupancy of Dll1icd on CTGF promoter sequences containing a Smad binding element. The indirect upregulation of CTGF expression by Dll1 is likely due to the ability of Dll1icd to increase Wnt signaling, a pathway that targets CTGF. CTGF expression is induced in butyrate-treated CC cells and results from clonal growth assays support a role for CTGF in the cell growth-suppressive role of butyrate. In conclusion, integration of the Notch, Wnt, and TGFbeta/Activin signaling pathways is in part mediated by the interactions of Dll1 with Smad2/3 and Tcf4.

  18. Detection of gravitational-wave bursts with chirplet-like template families

    E-Print Network [OSTI]

    Eric Chassande-Mottin; Miriam Miele; Satya Mohapatra; Laura Cadonati

    2010-05-28

    Gravitational Wave (GW) burst detection algorithms typically rely on the hypothesis that the burst signal is "locally stationary", that is it changes slowly with frequency. Under this assumption, the signal can be decomposed into a small number of wavelets with constant frequency. This justifies the use of a family of sine-Gaussian templates in the Omega pipeline, one of the algorithms used in LIGO-Virgo burst searches. However there are plausible scenarios where the burst frequency evolves rapidly, such as in the merger phase of a binary black hole and/or neutron star coalescence. In those cases, the local stationarity of sine-Gaussians induces performance losses, due to the mismatch between the template and the actual signal. We propose an extension of the Omega pipeline based on chirplet-like templates. Chirplets incorporate an additional parameter, the chirp rate, to control the frequency variation. In this paper, we show that the Omega pipeline can easily be extended to include a chirplet template bank. We illustrate the method on a simulated data set, with a family of phenomenological binary black-hole coalescence waveforms embedded into Gaussian LIGO/Virgo-like noise. Chirplet-like templates result in an enhancement of the measured signal-to-noise ratio.

  19. Successful Reproduction Requires the Function of Arabidopsis YELLOW STRIPE-LIKE1 and YELLOW STRIPE-LIKE3 Metal-Nicotianamine Transporters in Both Vegetative and Reproductive Structures

    SciTech Connect (OSTI)

    Chu, H.; Chiecko, J; Punshon, T; Lanzirotti, A; Lahner, B; Salt, D; Walker, E

    2010-01-01

    Several members of the Yellow Stripe-Like (YSL) family of proteins are transporters of metals that are bound to the metal chelator nicotianamine or the related set of mugineic acid family chelators known as phytosiderophores. Here, we examine the physiological functions of three closely related Arabidopsis (Arabidopsis thaliana) YSL family members, AtYSL1, AtYSL2, and AtYSL3, to elucidate their role(s) in the allocation of metals into various organs of Arabidopsis. We show that AtYSL3 and AtYSL1 are localized to the plasma membrane and function as iron transporters in yeast functional complementation assays. By using inflorescence grafting, we show that AtYSL1 and AtYSL3 have dual roles in reproduction: their activity in the leaves is required for normal fertility and normal seed development, while activity in the inflorescences themselves is required for proper loading of metals into the seeds. We further demonstrate that the AtYSL1 and AtYSL2 proteins, when expressed from the AtYSL3 promoter, can only partially rescue the phenotypes of a ysl1ysl3 double mutant, suggesting that although these three YSL transporters are closely related and have similar patterns of expression, they have distinct activities in planta. In particular, neither AtYSL1 nor AtYSL2 is able to functionally complement the reproductive defects exhibited by ysl1ysl3 double mutant plants.

  20. Initial Steps Towards Evaluating the Potential Disease Impacts of Propagated Marine Fish on Wild Stock: Examination of a New Herpes-like Virus

    E-Print Network [OSTI]

    Hedrick, Ronald P.; Arkush, Kristen D.

    2009-01-01

    Examination of a New Herpes-like Virus Ronald P. Hedricknewly discovered herpes-like virus among white seabass as amethodology Herpes-like virus particles (WSB-HV) have been

  1. OPTICAL AND DYNAMICAL CHARACTERIZATION OF COMET-LIKE MAIN-BELT ASTEROID (596) SCHEILA

    SciTech Connect (OSTI)

    Hsieh, Henry H.; Yang Bin; Haghighipour, Nader, E-mail: hsieh@ifa.hawaii.edu, E-mail: yangbin@ifa.hawaii.edu, E-mail: nader@ifa.hawaii.edu [Institute for Astronomy, Univ. of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States)

    2012-01-01

    We present observations and a dynamical analysis of the comet-like main-belt object, (596) Scheila. V-band photometry obtained on UT 2010 December 12 indicates that Scheila's dust cloud has a scattering cross-section {approx}1.4 times larger than that of the nucleus, corresponding to a dust mass of M{sub d} {approx} 3 Multiplication-Sign 10{sup 7} kg. V-R color measurements indicate that both the nucleus and dust are redder than the Sun, with no significant color differences between the dust cloud's northern and southern plumes. We also undertake an ultimately unsuccessful search for CN emission, where we find CN and H{sub 2}O production rates of Q{sub CN} < 9 Multiplication-Sign 10{sup 23} s{sup -1} and Q{sub H{sub 2O}}<10{sup 27} s{sup -1}. Numerical simulations indicate that Scheila is dynamically stable for >100 Myr, suggesting that it is likely native to its current location. We also find that it does not belong to a dynamical asteroid family of any significance. We consider sublimation-driven scenarios that could produce the appearance of multiple plumes of dust emission, but reject them as being physically implausible. Instead, we concur with previous studies that the unusual morphology of Scheila's dust cloud is most simply explained by a single oblique impact, meaning that this object is likely not a main-belt comet but is instead the second disrupted asteroid after P/2010 A2 (LINEAR) to be discovered.

  2. On the Verdet constant and Faraday rotation for graphene-like materials

    E-Print Network [OSTI]

    Mikkel H. Brynildsen; Horia D. Cornean

    2013-02-21

    We present a rigorous and rather self-contained analysis of the Verdet constant in graphene- like materials. We apply the gauge-invariant magnetic perturbation theory to a nearest- neighbour tight-binding model and obtain a relatively simple and exactly computable formula for the Verdet constant, at all temperatures and all frequencies of sufficiently large absolute value. Moreover, for the standard nearest neighbour tight-binding model of graphene we show that the transverse component of the conductivity tensor has an asymptotic Taylor expansion in the external magnetic field where all the coefficients of even powers are zero.

  3. LysM receptor-like kinases to improve plant defense response against fungal pathogens

    DOE Patents [OSTI]

    Wan, Jinrong; Stacey, Gary; Stacey, Minviluz; Zhang, Xuecheng

    2013-10-15

    Perception of chitin fragments (chitooligosaccharides) is an important first step in plant defense response against fungal pathogen. LysM receptor-like kinases (LysM RLKs) are instrumental in this perception process. LysM RLKs also play a role in activating transcription of chitin-responsive genes (CRGs) in plants. Mutations in the LysM kinase receptor genes or the downstream CRGs may affect the fungal susceptibility of a plant. Mutations in LysM RLKs or transgenes carrying the same may be beneficial in imparting resistance against fungal pathogens.

  4. Emergent comet-like swarming of optically driven thermally active colloids

    E-Print Network [OSTI]

    Jack A. Cohen; Ramin Golestanian

    2013-09-12

    We propose a simple system of optically driven colloids that convert light into heat and move in response to self- and collectively- generated thermal gradients. We show that the system exhibits self-organization into a moving comet-like swarm and characterize the structure and response of the swarm to a light intensity dependent external tuning parameter. We observe many interesting features in this nonequilibrium system including circulation and evaporation, intensity-dependent shape, density and temperature fluctuations, and ejection of hot colloids from the swarm tip.

  5. Analysis of a power grid using the Kuramoto-like model

    E-Print Network [OSTI]

    Filatrella, Giovanni; Pedersen, Niels Falsig

    2008-01-01

    We show that there is a link between the Kuramoto paradigm and another system of synchronized oscillators, namely an electrical power distribution grid of generators and consumers. The purpose of this work is to show both the formal analogy and some practical consequences. The mapping can be made quantitative, and under some necessary approximations a class of Kuramoto-like models, those with bimodal distribution of the frequencies, is most appropriate for the power-grid. In fact in the power-grid there are two kinds of oscillators: the 'sources' delivering power to the 'consumers'.

  6. Axion Searches with Helioscopes and astrophysical signatures for axion(-like) particles

    E-Print Network [OSTI]

    Zioutas, K; Semertzidis, Y; Papaevangelou, T; Dafni, T; Anastassopoulos, V

    2009-01-01

    The first part reviews the working mechanisms, capabilities and performance of axion helioscopes, including the achieved results so far. The 2nd part is observationally driven. New simulation results obtained with the Geant4 code reconstruct spectral shape of solar X-ray spectra, and their isotropic emission and lateral size. The derived rst mass of the axion(-like) particles is ~10meV. The axion interaction with magnetic field gradient is a generic theoretical suggestion that could reconcile present limits with relevant solar X-ray activity. A short outlook of the experimentally expanding solar axion field is given.

  7. A fourth generation, anomalous like-sign dimuon charge asymmetry and the LHC

    E-Print Network [OSTI]

    Debajyoti Choudhury; Dilip Kumar Ghosh

    2010-07-21

    A fourth chiral generation, with $m_{t^\\prime}$ in the range $\\sim (300 - 500)$ GeV and a moderate value of the CP-violating phase can explain the anomalous like-sign dimuon charge asymmetry observed recently by the D0 collaboration. The required parameters are found to be consistent with constraints from other $B$ and $K$ decays. The presence of such quarks, apart from being detectable in the early stages of the LHC, would also have important consequences in the electroweak symmetry breaking sector.

  8. Observation of the first iso-spin Charmonium-like State $Z_c(4020)$ }

    E-Print Network [OSTI]

    Ji, Qing-Ping; Guo, Ai-Qiang; Yu, Chun-Xu; Wang, Zhi-Yong

    2015-01-01

    In this paper, we present a new experimental progress in brief on the recent observation of the charged charmonium-like state Z_c(4020)^{+/-} states and its iso-spin partner Z_c(4020)^{0} in pi pi hc process at the BESIII experiment. The charged Z_{c}(4020) is its decay into \\pi^{+/-} hc final state, and carries electric charge, thus it contains at least four quarks. The observation of both charge and neutral state makes Z_{c}(4020) the first iso-spin triplet Z_{c} state observed in experiment.

  9. Higgs portal, fermionic dark matter, and a Standard Model like Higgs at 125 GeV

    E-Print Network [OSTI]

    Laura Lopez-Honorez; Thomas Schwetz; Jure Zupan

    2012-07-09

    We show that fermionic dark matter (DM) which communicates with the Standard Model (SM) via the Higgs portal is a viable scenario, even if a SM-like Higgs is found at around 125 GeV. Using effective field theory we show that for DM with a mass in the range from about 60 GeV to 2 TeV the Higgs portal needs to be parity violating in order to be in agreement with direct detection searches. For parity conserving interactions we identify two distinct options that remain viable: a resonant Higgs portal, and an indirect Higgs portal. We illustrate both possibilities using a simple renormalizable toy model.

  10. Possible Diamond-Like Nanoscale Structures Induced by Slow Highly-Charged Ions on Graphite (HOPG)

    SciTech Connect (OSTI)

    Sideras-Haddad, E.; Schenkel, T.; Shrivastava, S.; Makgato, T.; Batra, A.; Weis, C. D.; Persaud, A.; Erasmus, R.; Mwakikunga, B.

    2009-01-06

    The interaction between slow highly-charged ions (SHCI) of different charge states from an electron-beam ion trap and highly oriented pyrolytic graphite (HOPG) surfaces is studied in terms of modification of electronic states at single-ion impact nanosizeareas. Results are presented from AFM/STM analysis of the induced-surface topological features combined with Raman spectroscopy. I-V characteristics for a number of different impact regions were measured with STM and the results argue for possible formation of diamond-like nanoscale structures at the impact sites.

  11. A Vector-Like Fourth Generation with A Discrete Symmetry From Split-UED

    SciTech Connect (OSTI)

    Kong, Kyoungchul; /SLAC; Park, Seong Chan; /Tokyo U., IPMU; Rizzo, Thomas G.; /SLAC

    2011-08-19

    Split-UED allows for the possibility that the lowest lying KK excitations of the Standard Model fermions can be much lighter than the corresponding gauge or Higgs KK states. This can happen provided the fermion bulk masses are chosen to be large, in units of the inverse compactification radius, 1/R, and negative. In this setup, all of the other KK states would be effectively decoupled from low energy physics. Such a scenario would then lead to an apparent vector-like fourth generation with an associated discrete symmetry that allows us to accommodate a dark matter candidate. In this paper the rather unique phenomenology presented by this picture will be examined.

  12. Irradiation of DEPFET-like transistors with Co-60 gamma source up to 10 MRad

    E-Print Network [OSTI]

    Pablo Vázquez Regueiro; Eliseo Pérez Trigo; Pablo Rodríguez Pérez

    2011-11-18

    The Pixel Detector (PXD) of the Belle II experiment at superKEKB accelerator in Japan is based in the DEPFET technology. Two layers of 8+12 modules at a radius of 13 and 22 mm will give a spatial resolution below 10 mm. The radiation level expected in the first layer in ten years of operation is about 10 MRad of total ionizing dose. In order to study the tolerance of the DEPFET technology sixty devices were irradiated using a standard procedure like 60Co gamma source. Different doping types, channel sizes and biasing conditions were studied

  13. Evidence for linkage disequilibrium in chromosome 13-linked Duchenne-like muscular dystrophy

    SciTech Connect (OSTI)

    Othmane, K.B.; Speer, M.C.; Stauffer, J. [Duke Univ. Medical Center, Durham, NC (United States)] [and others

    1995-09-01

    Duchenne-like muscular dystrophy (DLMD) is an autosomal recessive Limb Girdle muscular dystrophy (LGMD2C) characterized by late age of onset, proximal muscle weakness leading to disability, high creatine kinase values, normal intelligence and normal dystrophin in muscle biopsy. We have shown previously that three DLMD families from Tunisia are linked to chromosome 13q12. To further localize the LGMD2C gene, we have investigated seven additional families (119 individuals). Both genotyping and two-point linkage analysis were performed as described elsewhere. 7 refs., 1 fig., 1 tab.

  14. LysM receptor-like kinases to improve plant defense response against fungal pathogens

    DOE Patents [OSTI]

    Wan, Jinrong (Columbia, MO); Stacey, Gary (Columbia, MO); Stacey, Minviluz (Columbia, MO); Zhang, Xuecheng (Columbia, MO)

    2012-01-17

    Perception of chitin fragments (chitooligosaccharides) is an important first step in plant defense response against fungal pathogen. LysM receptor-like kinases (LysM RLKs) are instrumental in this perception process. LysM RLKs also play a role in activating transcription of chitin-responsive genes (CRGs) in plants. Mutations in the LysM kinase receptor genes or the downstream CRGs may affect the fungal susceptibility of a plant. Mutations in LysM RLKs or transgenes carrying the same may be beneficial in imparting resistance against fungal pathogens.

  15. Zeolite-like metal–organic frameworks (ZMOFs): Design, synthesis, and properties

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

    Eddaoudi, Mohamed; Sava, Dorina F.; Eubank, Jarrod F.; Adil, Karim; Guillerm, Vincent

    2015-10-24

    This study highlights various design and synthesis approaches toward the construction of ZMOFs, which are metal–organic frameworks (MOFs) with topologies and, in some cases, features akin to traditional inorganic zeolites. The interest in this unique subset of MOFs is correlated with their exceptional characteristics arising from the periodic pore systems and distinctive cage-like cavities, in conjunction with modular intra- and/or extra-framework components, which ultimately allow for tailoring of the pore size, pore shape, and properties towards specific applications.

  16. Static vacuum solutions from convergent null data expansions at space-like infinity

    E-Print Network [OSTI]

    Helmut Friedrich

    2006-06-30

    We study formal expansions of asymptotically flat solutions to the static vacuum field equations which are determined by minimal sets of freely specifyable data referred to as `null data'. These are given by sequences of symmetric trace free tensors at space-like infinity of increasing order. They are 1:1 related to the sequences of Geroch multipoles. Necessary and sufficient growth estimates on the null data are obtained for the formal expansions to be absolutely convergent. This provides a complete characterization of all asymptotically flat solutions to the static vacuum field equations.

  17. The second-order electron self-energy in hydrogen-like ions

    E-Print Network [OSTI]

    I. Goidenko; L. Labzowsky; A. Nefiodov; G. Plunien; G. Soff

    1999-04-08

    A calculation of the simplest part of the second-order electron self-energy (loop after loop irreducible contribution) for hydrogen-like ions with nuclear charge numbers $3 \\leq Z \\leq 92$ is presented. This serves as a test for the more complicated second-order self-energy parts (loop inside loop and crossed loop contributions) for heavy one-electron ions. Our results are in strong disagreement with recent calculations of Mallampalli and Sapirstein for low $Z$ values but are compatible with the two known terms of the analytical $Z\\alpha$-expansion.

  18. Recipe theorem for the Tutte polynomial for matroids, renormalization group-like approach

    E-Print Network [OSTI]

    Gérard H. E. Duchamp; Nguyen Hoang-Nghia; Thomas Krajewski; Adrian Tanasa

    2013-01-04

    Using a quantum field theory renormalization group-like differential equation, we give a new proof of the recipe theorem for the Tutte polynomial for matroids. The solution of such an equation is in fact given by some appropriate characters of the Hopf algebra of isomorphic classes of matroids, characters which are then related to the Tutte polynomial for matroids. This Hopf algebraic approach also allows to prove, in a new way, a matroid Tutte polynomial convolution formula appearing in W. Kook {\\it et. al., J. Comb. Series} {\\bf B 76} (1999).

  19. Analysis of a power grid using the Kuramoto-like model

    E-Print Network [OSTI]

    Giovanni Filatrella; Arne Hejde Nielsen; Niels Falsig Pedersen

    2008-02-16

    We show that there is a link between the Kuramoto paradigm and another system of synchronized oscillators, namely an electrical power distribution grid of generators and consumers. The purpose of this work is to show both the formal analogy and some practical consequences. The mapping can be made quantitative, and under some necessary approximations a class of Kuramoto-like models, those with bimodal distribution of the frequencies, is most appropriate for the power-grid. In fact in the power-grid there are two kinds of oscillators: the 'sources' delivering power to the 'consumers'.

  20. Null to time-like infinity Green's functions for asymptotic symmetries in Minkowski spacetime

    E-Print Network [OSTI]

    Campiglia, Miguel

    2015-01-01

    We elaborate on the Green's functions that appeared in [1,2] when generalizing, from massless to massive particles, various equivalences between soft theorems and Ward identities of large gauge symmetries. We analyze these Green's functions in considerable detail and show that they form a hierarchy of functions which describe `boundary to bulk' propagators for large $U(1)$ gauge parameters, supertranslations and sphere vector fields respectively. As a consistency check we verify that the Green's functions associated to the large diffeomorphisms map the Poincare group at null infinity to the Poincare group at time-like infinity.

  1. On a "Robust" A-like State of $^3He$ in Aerogel

    E-Print Network [OSTI]

    G. A. Baramidze; G. A. Kharadze

    2006-05-02

    The orbitally isotropic Equal Spin Pairing (ESP) state has been proposed in Ref. [1] as a candidate of an A-like phase of superfluid $^3He$ in aerogel environment. In order to preserve an exact isotropy of the state in the presence of the magnetic field the condensate with equal values of the amplitudes $\\Delta_{\\uparrow\\uparrow}$ and $\\Delta_{\\downarrow\\downarrow}$ was adopted. Experimentally it is established that this version does not reproduce observed splitting asymmetry of ESP phase in aerogel under the action of an external magnetic field. Here we explore the behavior of the quasi-isotropic version of an axiplanar ESP phase with $\\Delta_{\\uparrow\\uparrow}\

  2. X-ray crystal spectrometer upgrade for ITER-like wall experiments at JET

    SciTech Connect (OSTI)

    Shumack, A. E.; Rzadkiewicz, J.; Chernyshova, M.; Czarski, T.; Karpinski, L.; Jakubowska, K.; Scholz, M.; Byszuk, A.; Cieszewski, R.; Kasprowicz, G.; Pozniak, K.; Wojenski, A.; Zabolotny, W.; Dominik, W.; Conway, N. J.; Dalley, S.; Tyrrell, S.; Zastrow, K.-D.; Figueiredo, J. [EFDA-CSU, Culham Science Centre, Abingdon OX14 3DB; Associação EURATOM and others

    2014-11-15

    The high resolution X-Ray crystal spectrometer at the JET tokamak has been upgraded with the main goal of measuring the tungsten impurity concentration. This is important for understanding impurity accumulation in the plasma after installation of the JET ITER-like wall (main chamber: Be, divertor: W). This contribution provides details of the upgraded spectrometer with a focus on the aspects important for spectral analysis and plasma parameter calculation. In particular, we describe the determination of the spectrometer sensitivity: important for impurity concentration determination.

  3. Birkhoff-like theorem for rotating stars in (2+1) dimensions

    E-Print Network [OSTI]

    Skakala, Jozef

    2009-01-01

    Consider a rotating and possibly pulsating "star" in (2+1) dimensions. If the star is axially symmetric, then in the vacuum region surrounding the star, (a region that we assume at most contains a cosmological constant), we shall show that the Einstein equations imply that the geometry is in fact stationary. Furthermore, the geometry external to the star is uniquely guaranteed to be the (2+1) dimensional analogue of the Kerr-de Sitter spacetime, the BTZ geometry. This Birkhoff-like theorem is very special to (2+1) dimensions, and fails in (3+1) dimensions.

  4. Structure of Human Toll-like Receptor 3 (TLR3) Ligand-binding Domain

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effect PhotovoltaicsStructure and Receptor Specificity ofHuman Toll-like Receptor 3

  5. Role of the upper ocean structure in the response of ENSO-like SST variability to global warming

    E-Print Network [OSTI]

    Noh, Yign

    Role of the upper ocean structure in the response of ENSO-like SST variability to global warming)-like variability to global warming varies comparatively between the two different climate system models, i are reduced in the eastern equatorial Pacific under global warming, which erodes the thermo- cline feedback

  6. What Global Warming Looks Like The July 2010 global map of surface temperature anomalies (Figure 1), relative to the average

    E-Print Network [OSTI]

    Hansen, James E.

    What Global Warming Looks Like The July 2010 global map of surface temperature anomalies (Figure 1 anomalies an example of what we can expect global warming to look like? Maps of temperature anomalies, such as Figure 1, are useful for helping people understand the role of global warming in extreme events

  7. Statistical weaknesses in 20 RC4-like algorithms and (probably) the simplest algorithm free from these weaknesses -VMPC-R

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Statistical weaknesses in 20 RC4-like algorithms and (probably) the simplest algorithm free from statistical weaknesses in 20 RC4-like algorithms including the original RC4, RC4A, PC-RC4 and others. This is achieved using a simple statistical test. We found only one algorithm which was able to pass the test

  8. Observations of Improved Stability and Confinement in a High-Self-Organized Spherical-Torus-Like Field-Reversed Configuration

    E-Print Network [OSTI]

    Washington at Seattle, University of

    -Torus-Like Field-Reversed Configuration H. Y. Guo, A. L. Hoffman, L. C. Steinhauer, and K. E. Miller Redmond Plasma (FRC) with a spherical- torus- (ST-)like core is produced in the translation, confinement. This plasma state exhibits a remarkable stabilizing property for the ubiquitous n 2 centrifugally driven

  9. AlTiN layer effect on mechanical properties of Ti-doped diamond-like carbon composite coatings

    E-Print Network [OSTI]

    Volinsky, Alex A.

    AlTiN layer effect on mechanical properties of Ti-doped diamond-like carbon composite coatings Adhesion Ti/Ti-doped diamond-like carbon (DLC) and Ti/AlTiN/Ti-DLC composite coatings were deposited on the properties of these composite coatings was investigated through microstructure and mechanical properties

  10. Predictability of a Mediterranean Tropical-Like Storm Downstream of the Extratropical Transition of Hurricane Helene (2006)

    E-Print Network [OSTI]

    Chaboureau, Jean-Pierre

    2006-01-01

    northeastward by an upstream trough during ET and contributed to the building of a downstream ridge. A troughPredictability of a Mediterranean Tropical-Like Storm Downstream of the Extratropical Transition downstream. The present study focuses on the predictability of a Mediterranean tropical-like storm (Medicane

  11. A Multigrid-like Technique for Power Grid Analysis Joseph N. Kozhaya, Sani R. Nassif, and Farid N. Najm

    E-Print Network [OSTI]

    Najm, Farid N.

    1 A Multigrid-like Technique for Power Grid Analysis Joseph N. Kozhaya, Sani R. Nassif, and Farid N. Najm Abstract-- Modern sub-micron VLSI designs include huge power grids that are required to distribute and memory complexity. We propose a novel multigrid-like technique for the analysis of power grids. The grid

  12. Free energy landscape of protein-like chains with discontinuous potentials Hanif Bayat Movahed, Ramses van Zon, and Jeremy Schofield

    E-Print Network [OSTI]

    Schofield, Jeremy

    Free energy landscape of protein-like chains with discontinuous potentials Hanif Bayat Movahed://jcp.aip.org/about/rights_and_permissions #12;THE JOURNAL OF CHEMICAL PHYSICS 136, 245103 (2012) Free energy landscape of protein-like chains of observing the most common configuration is used to analyze the nature of the free energy landscape

  13. Precipitation of amorphous CaCO3 (aragonite-like) by cyanobacteria: A STXM study of the influence of EPS

    E-Print Network [OSTI]

    Hitchcock, Adam P.

    Precipitation of amorphous CaCO3 (aragonite-like) by cyanobacteria: A STXM study of the influence-range order was found to be a transient precursor phase of calcite precipitation mediated by cyanobacteria amounts of precipitation of the aragonite-like CaCO3, whereas the amount of Ca2+ adsorbed per volume

  14. Performance of conjugate gradient-like algorithms in transient two-phase subchannel analysis

    SciTech Connect (OSTI)

    Turner, J.A. (Los Alamos National Lab., NM (USA)); Doster, M.J. (North Carolina State Univ., Raleigh, NC (USA). Dept. of Nuclear Engineering)

    1991-01-01

    A transient, drift-flux subchannel analysis code (SWIRL) has been created for the development and evaluation of algorithms for the solution of weakly three-dimensional fluid flow problems. Spatial discretization on a staggered grid, semi-implicit temporal discretization, and algebraic reduction of the conservation equations of mass, energy, and momentum result in nonsymmetric block-tridiagonal linear systems of equations that must be solved for the pressure distribution at each time step of a transient. The solution of these systems of equations is the most time-consuming portion of the code, and direct, stationary iterative, and preconditioned conjugate gradient (CG)-like methods have been investigated both for a simple approach to steady-state and for a severe transient. The best direct algorithm appears to be an efficient implementation of block elimination, and iterative methods are compared to this algorithm for accuracy, robustness, and efficiency. Results presented here indicate that preconditioned CG-like methods such as Sonneveld's conjugate gradients squared are superior to an efficient direct method. 44 refs., 13 figs.

  15. Strain-engineered band parameters of graphene-like SiC monolayer

    SciTech Connect (OSTI)

    Behera, Harihar; Mukhopadhyay, Gautam

    2014-10-06

    Using full-potential density functional theory (DFT) calculations we show that the band gap and effective masses of charge carriers in SiC monolayer (ML-SiC) in graphene-like two-dimensional honeycomb structure are tunable by strain engineering. ML-SiC was found to preserve its flat 2D graphene-like structure under compressive strain up to 7%. A transition from indirect-to-direct gap-phase is predicted to occur for a strain value lying within the interval (1.11 %, 1.76%). In both gap-phases band gap decreases with increasing strain, although the rate of decrease is different in the two gap-phases. Effective mass of electrons show a non-linearly decreasing trend with increasing tensile strain in the direct gap-phase. The strain-sensitive properties of ML-SiC, may find applications in future strain-sensors, nanoelectromechanical systems (NEMS) and nano-optomechanical systems (NOMS) and other nano-devices.

  16. Methods for estimating wake flow and effluent dispersion near simple block-like buildings

    SciTech Connect (OSTI)

    Hosker, R.P. Jr.

    1981-05-01

    This report is intended as an interim guide for those who routinely face air quality problems associated with near-building exhaust stack placement and height, and the resulting concentration patterns. Available data and methods for estimating wake flow and effluent dispersion near isolated block-like structures are consolidated. The near-building and wake flows are described, and quantitative estimates for frontal eddy size, height and extent of roof and wake cavities, and far wake behavior are provided. Concentration calculation methods for upwind, near-building, and downwind pollutant sources are given. For an upwind source, it is possible to estimate the required stack height, and to place upper limits on the likely near-building concentration. The influences of near-building source location and characteristics relative to the building geometry and orientation are considered. Methods to estimate effective stack height, upper limits for concentration due to flush roof vents, and the effect of changes in rooftop stack height are summarized. Current wake and wake cavity models are presented. Numerous graphs of important expressions have been prepared to facilitate computations and quick estimates of flow patterns and concentration levels for specific simple buildings. Detailed recommendations for additional work are given.

  17. Towards the Final State of Spherical Gravitational Collapse and Likely Source of Gamma Ray Bursts

    E-Print Network [OSTI]

    Abhas Mitra

    1999-09-23

    We invoke the global properties of the actual GTR field equations for spherical collapse to directly show that the condition for formation of trapped surfaces, 2GM/R >1 is not allowed by GTR. And therefore all singularity theorems based on the assumption of formation of trapped surfaces are invalidated! Our conclusion is in perfect agreement with Einstein's intuitive idea that a Sch. like surface can not occur in reality. Further as singularity is approached R ->0, in order that 2GM/R 0! Harrison, et al. had also pointed out that collapse should come to a decisive end with M=0. This is possible in GTR if the fluid radiates its entire original mass-energy during the relentless graviatational contraction process, Q->M c^2! Since the actual efficiency for gamma ray production by the relevant blast wave may hardly exceed 10-20% and there could be a stronger (undetected) nu-anti-nu burst precding GRBs, the actual energy released for GRB 990123, even accounting for probable weak beaming, or for GRB 971214 (unbeamed) could be ~10^{54-55} erg. And such energy release may not be properly accountable without realizing that trapped surfaces are indeed not formed. All authors concerned with this subject, and particularly those, who would like to differ with our derivation are requested to send their criticism either directly or express the same openly for a healthy scientific discussion.

  18. Feynman-like rules for calculating n-point correlators of the primordial curvature perturbation

    SciTech Connect (OSTI)

    Valenzuela-Toledo, César A.; Rodríguez, Yeinzon; Almeida, Juan P. Beltrán E-mail: yeinzon.rodriguez@uan.edu.co

    2011-10-01

    A diagrammatic approach to calculate n-point correlators of the primordial curvature perturbation ? was developed a few years ago following the spirit of the Feynman rules in Quantum Field Theory. The methodology is very useful and time-saving, as it is for the case of the Feynman rules in the particle physics context, but, unfortunately, is not very well known by the cosmology community. In the present work, we extend such an approach in order to include not only scalar field perturbations as the generators of ?, but also vector field perturbations. The purpose is twofold: first, we would like the diagrammatic approach (which we would call the Feynman-like rules) to become widespread among the cosmology community; second, we intend to give an easy tool to formulate any correlator of ? for those cases that involve vector field perturbations and that, therefore, may generate prolonged stages of anisotropic expansion and/or important levels of statistical anisotropy. Indeed, the usual way of formulating such correlators, using the Wick's theorem, may become very clutter and time-consuming.

  19. The spectrum of kink-like oscillations of solar photospheric magnetic elements

    E-Print Network [OSTI]

    Stangalini, M; Consolini, G

    2013-01-01

    Recently, the availability of new high-spatial and -temporal resolution observations of the solar photosphere has allowed the study of the oscillations in small magnetic elements. Small magnetic elements have been found to host a rich variety of oscillations detectable as intensity, longitudinal or transverse velocity fluctuations which have been interpreted as MHD waves. Small magnetic elements, at or below the current spatial resolution achieved by modern solar telescopes, are though to play a relevant role in the energy budget of the upper layers of the Sun's atmosphere, as they are found to cover a significant fraction of the solar photosphere. Unfortunately, the limited temporal length and/or cadence of the data sets, or the presence of seeing-induced effects have prevented, so far, the estimation of the power spectra of kink-like oscillations in small magnetic elements with good accuracy. Motivated by this, we studied kink-like oscillations in small magnetic elements, by exploiting very long duration an...

  20. Quantum thermodynamic Carnot and Otto-like cycles for a two-level system

    E-Print Network [OSTI]

    Gian Paolo Beretta

    2007-03-28

    From the thermodynamic equilibrium properties of a two-level system with variable energy-level gap $\\Delta$, and a careful distinction between the Gibbs relation $dE = T dS + (E/\\Delta) d\\Delta$ and the energy balance equation $dE = \\delta Q^\\leftarrow - \\delta W^\\to$, we infer some important aspects of the second law of thermodynamics and, contrary to a recent suggestion based on the analysis of an Otto-like thermodynamic cycle between two values of $\\Delta$ of a spin-1/2 system, we show that a quantum thermodynamic Carnot cycle, with the celebrated optimal efficiency $1 - (T_{low}/T_{high})$, is possible in principle with no need of an infinite number of infinitesimal processes, provided we cycle smoothly over at least three (in general four) values of $\\Delta$, and we change $\\Delta$ not only along the isoentropics, but also along the isotherms, e.g., by use of the recently suggested maser-laser tandem technique. We derive general bounds to the net-work to high-temperature-heat ratio for a Carnot cycle and for the 'inscribed' Otto-like cycle, and represent these cycles on useful thermodynamic diagrams.

  1. Polo-like Kinase I is involved in Invasion through Extracellular Matrix

    SciTech Connect (OSTI)

    Bissell, Mina J; Rizki, Aylin; Mott, Joni D.; Bissell, Mina J

    2008-04-02

    Polo-like kinase 1, PLK1, has important functions in maintaining genome stability and is involved in regulation of mitosis. PLK1 is up regulated in many invasive carcinomas. We asked whether it may also play a role in acquisition of invasiveness, a crucial step in transition to malignancy. In a model of metaplastic basal-like breast carcinoma progression, we found that PLK1 expression is necessary but not sufficient to induce invasiveness through laminin-rich extracellular matrix. PLK1 mediates invasion via Vimentin and {beta}1 integrin, both of which are necessary. We observed that PLK1 phosphorylates Vimentin on serine 82, which in turn regulates cell surface levels of {beta}1 integrin. We found PLK1 to be also highly expressed in pre-invasive in situ carcinomas of the breast. These results support a role for the involvement of PLK1 in the invasion process and point to this pathway as a potential therapeutic target for pre-invasive and invasive breast carcinoma treatment.

  2. Characterization of diamond-like nanocomposite thin films grown by plasma enhanced chemical vapor deposition

    SciTech Connect (OSTI)

    Santra, T. S.; Liu, C. H. [Institute of Nanoengineering and Microsystems (NEMS), National Tsing Hua University, Hsinchu, Taiwan 30043 (China); Bhattacharyya, T. K. [Department of Electronics and Electrical Communication Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal (India); Patel, P. [Department of Electrical and Computer Engineering, University of Illinois at Urbana Champaign, Urbana, Illinois 61801 (United States); Barik, T. K. [School of Applied Sciences, Haldia Institute of Technology, Haldia 721657, Purba Medinipur, West Bengal (India)

    2010-06-15

    Diamond-like nanocomposite (DLN) thin films, comprising the networks of a-C:H and a-Si:O were deposited on pyrex glass or silicon substrate using gas precursors (e.g., hexamethyldisilane, hexamethyldisiloxane, hexamethyldisilazane, or their different combinations) mixed with argon gas, by plasma enhanced chemical vapor deposition technique. Surface morphology of DLN films was analyzed by atomic force microscopy. High-resolution transmission electron microscopic result shows that the films contain nanoparticles within the amorphous structure. Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, and x-ray photoelectron spectroscopy (XPS) were used to determine the structural change within the DLN films. The hardness and friction coefficient of the films were measured by nanoindentation and scratch test techniques, respectively. FTIR and XPS studies show the presence of C-C, C-H, Si-C, and Si-H bonds in the a-C:H and a-Si:O networks. Using Raman spectroscopy, we also found that the hardness of the DLN films varies with the intensity ratio I{sub D}/I{sub G}. Finally, we observed that the DLN films has a better performance compared to DLC, when it comes to properties like high hardness, high modulus of elasticity, low surface roughness and low friction coefficient. These characteristics are the critical components in microelectromechanical systems (MEMS) and emerging nanoelectromechanical systems (NEMS).

  3. Gravitational instabilities in a protosolar-like disc I: dynamics and chemistry

    E-Print Network [OSTI]

    Evans, M G; Boley, A C; Caselli, P; Durisen, R H; Hartquist, T W; Rawlings, J M C

    2015-01-01

    To date, most simulations of the chemistry in protoplanetary discs have used 1+1D or 2D axisymmetric $\\alpha$-disc models to determine chemical compositions within young systems. This assumption is inappropriate for non-axisymmetric, gravitationally unstable discs, which may be a significant stage in early protoplanetary disc evolution. Using 3D radiative hydrodynamics, we have modelled the physical and chemical evolution of a 0.17 M$_{\\odot}$ self-gravitating disc over a period of 2000 yr. The 0.8 M$_{\\odot}$ central protostar is likely to evolve into a solar-like star, and hence this Class 0 or early Class I young stellar object may be analogous to our early Solar System. Shocks driven by gravitational instabilities enhance the desorption rates, which dominate the changes in gas-phase fractional abundances for most species. We find that at the end of the simulation, a number of species distinctly trace the spiral structure of our relatively low-mass disc, particularly CN. We compare our simulation to that o...

  4. Stochastic differentiation into an osteoclast lineage from cloned macrophage-like cells

    SciTech Connect (OSTI)

    Hayashi, Shin-Ichi; Murata, Akihiko; Okuyama, Kazuki; Shimoda, Yuhki; Hikosaka, Mari; Yasuda, Hisataka; Yoshino, Miya

    2012-11-16

    Highlights: Black-Right-Pointing-Pointer The frequency of C7 differentiation into osteoclast was low and constant. Black-Right-Pointing-Pointer Only extended C7 cell cultures exponentially increased osteoclast+ cultures. Black-Right-Pointing-Pointer C7 cell differentiation into committed osteoclast precursors is on 'autopilot'. Black-Right-Pointing-Pointer The system may maintain the stem cell self-renewal and differentiation. -- Abstract: Differentiation into osteoclasts is induced by a macrophage colony-stimulating factor and receptor activator of nuclear-factor {kappa}B ligand. The macrophage-like cell line, C7 has the potential to differentiate into osteoclasts when it is cultured with both factors for 6 days. Although C7 is an established cell line, the frequency of differentiation into this lineage was less than 10%, and the ratio was maintained at a constant level, even after repeated cloning. In this study, to increase the differentiation of C7 cells to osteoclasts, C7 derivative treatments with several activators and/or inhibitors were performed for 3 days prior to setting osteoclast induction analysis; however, a reagent to significantly up-regulate the frequency of differentiation was not found. Only extended cultures for osteoclastogenesis exponentially increased the frequency of osteoclast precursors. It is likely that C7 cell differentiation into committed osteoclast precursors is on 'autopilot' rather than requiring specific signals to drive this process.

  5. Design, manufacture and initial operation of the beryllium components of the JET ITER-like wall

    E-Print Network [OSTI]

    Riccardo, V; Matthews, G F; Nunes, I; Thompson, V; Villedieu, E; Contributors, JET EFDA

    2013-01-01

    The aim of the JET ITER-like Wall Project was to provide JET with the plasma facing material combination now selected for the DT phase of ITER (bulk beryllium main chamber limiters and a full tungsten divertor) and, in conjunction with the upgraded neutral beam heating system, to achieve ITER relevant conditions. The design of the bulk Be plasma facing components had to be compatible with increased heating power and pulse length, as well as to reuse the existing tile supports originally designed to cope with disruption loads from carbon based tiles and be installed by remote handling. Risk reduction measures (prototypes, jigs, etc) were implemented to maximize efficiency during the shutdown. However, a large number of clashes with existing components not fully captured by the configuration model occurred. Restarting the plasma on the ITER-like Wall proved much easier than for the carbon wall and no deconditioning by disruptions was observed. Disruptions have been more threatening than expected due to the redu...

  6. Free Energy Landscape of Protein-like Chains with Discontinuous Potentials

    E-Print Network [OSTI]

    Hanif Bayat Movahed; Ramses van Zon; Jeremy Schofield

    2012-03-23

    In this article the configurational space of two simple protein models consisting of polymers composed of a periodic sequence of four different kinds of monomers is studied as a function of temperature. In the protein models, hydrogen bond interactions, electrostatic repulsion, and covalent bond vibrations are modeled by discontinuous step, shoulder and square-well potentials, respectively. The protein-like chains exhibit a secondary alpha helix structure in their folded states at low temperatures, and allow a natural definition of a configuration by considering which beads are bonded. Free energies and entropies of configurations are computed using the parallel tempering method in combination with hybrid Monte Carlo sampling of the canonical ensemble of the discontinuous potential system. The probability of observing the most common configuration is used to analyze the nature of the free energy landscape, and it is found that the model with the least number of possible bonds exhibits a funnel-like free energy landscape at low enough temperature for chains with fewer than 30 beads. For longer proteins, the landscape consists of several minima, where the configuration with the lowest free energy changes significantly by lowering the temperature and the probability of observing the most common configuration never approaches one due to the degeneracy of the lowest accessible potential energy.

  7. A natural SM-like 126 GeV Higgs via non-decoupling D-terms

    E-Print Network [OSTI]

    Enrico Bertuzzo; Claudia Frugiuele

    2014-12-08

    Accommodating both a 126 GeV mass and Standard Model (SM) like couplings for the Higgs has a fine tuning price in supersymmetric models. Examples are the MSSM, in which SM-like couplings are natural, but raising the Higgs mass up to 126 GeV requires a considerable tuning, or the NMSSM, in which the situation is reversed: the Higgs is naturally heavier, but being SM-like requires some tuning. We show that models with non-decoupling D-terms alleviate this tension - a 126 GeV SM-like Higgs comes out basically with no fine tuning cost. In addition, the analysis of the fine tuning of the extended gauge sector shows that naturalness requires the heavy gauge bosons to likely be within the LHC run II reach.

  8. An interpolation between the wave and diffusion equations through the fractional evolution equations Dirac like

    SciTech Connect (OSTI)

    Pierantozzi, T.; Vazquez, L.

    2005-11-01

    Through fractional calculus and following the method used by Dirac to obtain his well-known equation from the Klein-Gordon equation, we analyze a possible interpolation between the Dirac and the diffusion equations in one space dimension. We study the transition between the hyperbolic and parabolic behaviors by means of the generalization of the D'Alembert formula for the classical wave equation and the invariance under space and time inversions of the interpolating fractional evolution equations Dirac like. Such invariance depends on the values of the fractional index and is related to the nonlocal property of the time fractional differential operator. For this system of fractional evolution equations, we also find an associated conserved quantity analogous to the Hamiltonian for the classical Dirac case.

  9. Generic features of the wealth distribution in ideal-gas-like markets

    E-Print Network [OSTI]

    P. K. Mohanty

    2006-07-10

    We provide an exact solution to the ideal-gas-like models studied in econophysics to understand the microscopic origin of Pareto-law. In these class of models the key ingredient necessary for having a self-organized scale-free steady-state distribution is the trading or collision rule where agents or particles save a definite fraction of their wealth or energy and invests the rest for trading. Using a Gibbs ensemble approach we could obtain the exact distribution of wealth in this model. Moreover we show that in this model (a) good savers are always rich and (b) every agent poor or rich invests the same amount for trading. Nonlinear trading rules could alter the generic scenario observed here.

  10. Universality and criticality of a second-order granular solid-liquid-like phase transition

    E-Print Network [OSTI]

    Gustavo Castillo; Nicolás Mujica; Rodrigo Soto

    2015-01-20

    We experimentally study the critical properties of the non-equilibrium solid-liquid-like transition that takes place in vibrated granular matter. The critical dynamics is characterized by the coupling of the density field with the bond-orientational order parameter $Q_4$, which measures the degree of local crystallization. Two setups are compared, which present the transition at different critical accelerations as a a result of modifying the energy dissipation parameters. In both setups five independent critical exponents are measured, associated to different properties of $Q_4$: the correlation length, relaxation time, vanishing wavenumber limit (static susceptibility), the hydrodynamic regime of the pair correlation function, and the amplitude of the order parameter. The respective critical exponents agree in both setups and are given by $\

  11. EIT-like transmission by interaction between multiple Bragg scattering and local plasmonic resonances

    E-Print Network [OSTI]

    Liu, Z Z; Xiao, J J

    2015-01-01

    We study the optical properties associated to both the polariton gap and the Bragg gap in periodic resonator-waveguide coupled system, based on the temporal coupled mode theory and the transfer matrix method. By the complex band and the transmission spectrum, it is feasible to tune the interaction between multiple Bragg scattering and the local resonance, which may give rise to analogous phenomena of electromagnetically induced transparency (EIT). We further design a plasmonic slot waveguide side-coupled with local plasmonic resonator to demonstrate the EIT-like effects in the near-infared band. Numerical calculations show that realistic amount of metal Joule loss may destroy the interference and the total absorption is enhanced in the transparency windwo due to the near zero group velocity of the guiding wave.

  12. Axion-Like Particle Imprint in Cosmological Very-High-Energy Sources

    SciTech Connect (OSTI)

    Dominguez, A.; Sanchez-Conde, M.A.; Prada, F.; /IAA, Granada

    2012-06-13

    Discoveries of very high energy (VHE) photons from distant blazars suggest that, after correction by extragalactic background light (EBL) absorption, there is a flatness or even a turn-up in their spectra at the highest energies that cannot be easily explained by the standard framework. Here, it is shown that a possible solution to this problem is achieved by assuming the existence of axion-like particles (ALPs) with masses {approx} 1 neV. The ALP scenario is tested making use of observations of the highest redshift blazars known in the VHE energy regime, namely 3C 279, 3C 66A, PKS 1222+216 and PG 1553+113. In all cases, better fits to the observed spectra are found when including ALPs rather than considering EBL only. Interestingly, quite similar critical energies for photon/ALP conversions are also derived, independently of the source considered.

  13. The Osmotic Coefficient of Rod-like Polyelectrolytes: Computer Simulation, Analytical Theory, and Experiment

    E-Print Network [OSTI]

    M. Deserno; C. Holm; J. Blaul; M. Ballauff; M. Rehahn

    2001-05-09

    The osmotic coefficient of solutions of rod-like polyelectrolytes is considered by comparing current theoretical treatments and simulations to recent experimental data. The discussion is restricted to the case of monovalent counterions and dilute, salt-free solutions. The classical Poisson-Boltzmann solution of the cell model correctly predicts a strong decrease in the osmotic coefficient, but upon closer look systematically overestimates its value. The contribution of ion-ion-correlations are quantitatively studied by MD simulations and the recently proposed DHHC theory. However, our comparison with experimental data obtained on synthetic, stiff-chain polyelectrolytes shows that correlation effects can only partly explain the discrepancy. A quantitative understanding thus requires theoretical efforts beyond the restricted primitive model of electrolytes.

  14. Ramsey-like measurement of the decoherence rate between Zeeman sub-levels

    E-Print Network [OSTI]

    M. Shuker; O. Firstenberg; Y. Sagi; A. Ben-kish; N. Davidson; A. Ron

    2008-07-19

    Two-photon processes that involve different sub-levels of the ground state of an atom, are highly sensitive to depopulation and decoherence within the ground state. For example, the spectral width of electromagnetically induced transparency resonances in $\\Lambda-$type system, are strongly affected by the ground state depopulation and decoherence rates. We present a direct measurement of decay rates between hyperfine and Zeeman sub-levels in the ground state of $^{87}$Rb vapor. Similar to the relaxation-in-the-dark technique, pumping lasers are used to pre-align the atomic vapor in a well defined quantum state. The free propagation of the atomic state is monitored using a Ramsey-like method. Coherence times in the range 1-10 ms were measured for room temperature atomic vapor. In the range of the experimental parameters used in this study, the dominant process inducing Zeeman decoherence is the spin-exchange collisions between rubidium atoms.

  15. Patchy worm-like micelles: solution structure studied by small-angle neutron scattering

    E-Print Network [OSTI]

    S. Rosenfeldt; F. Luedel; C. Schulreich; T. Hellweg; A. Radulescu; J. Schmelz; H. Schmalz; L. Harnau

    2012-09-20

    Triblock terpolymers exhibit a rich self-organization behavior including the formation of fascinating cylindrical core-shell structures with a phase separated corona. After crystallization-induced self-assembly of polystryrene-(block)-polyethylene-(block)-poly(methyl methacrylate) triblock terpolymers (abbreviated as SEMs = Styrene-Ethylene-Methacrylates) from solution, worm-like core-shell micelles with a patchy corona of polystryrene and poly(methyl methacrylate) were observed by transmission electron microscopy. However, the solution structure is still a matter of debate. Here, we present a method to distinguish in-situ between a Janus-type (two faced) and a patchy (multiple compartments) configuration of the corona. To discriminate between both models the scattering intensity must be determined mainly by one corona compartment. Contrast variation in small-angle neutron scattering enables us to focus on one compartment of the SEMs. The results validate the existence of the patchy structure also in solution.

  16. Measurement of electron neutrino CCQE-like cross-section in MINERvA

    E-Print Network [OSTI]

    Jeremy Wolcott; for the MINERvA collaboration

    2015-01-21

    The electron-neutrino charged-current quasi-elastic (CCQE) cross-section on nuclei is an important input parameter to appearance-type neutrino oscillation experiments. Current experiments typically work from the muon neutrino cross-section and apply corrections from theoretical arguments to obtain a prediction for the electron neutrino cross-section, but to date there has been no experimental verification of the estimates for this channel at an energy scale appropriate to such experiments. We present a preliminary result from the MINERvA experiment on the first measurement of an exclusive reaction in few-GeV electron neutrino interactions, namely, the cross-section for a CCQE-like process. The result is given both as differential cross-sections vs. the electron energy, electron angle, and $Q^{2}$, as well as a total cross-section vs. neutrino energy.

  17. Charged String-like Solutions of Low-energy Heterotic String Theory

    E-Print Network [OSTI]

    Daniel Waldram

    1992-10-06

    Two string-like solutions to the equations of motion of the low-energy effective action for the heterotic string are found, each a source of electric and magnetic fields. The first carries an electric current equal to the electric charge per unit length and is the most general solution which preserves one half of the supersymmetries. The second is the most general charged solution with an event horizon, a `black string'. The relationship of the solutions to fundamental, macroscopic heterotic strings is discussed, and in particular it is shown that any stable state of such a fundamental string also preserves one half of the supersymmetries, in the same manner as the first solution.

  18. The hydrogen bond network of water supports propagating optical phonon-like modes

    E-Print Network [OSTI]

    Daniel C. Elton; M. -V. Fernández-Serra

    2015-11-03

    The local structure of liquid water as a function of temperature is a source of intense research. This structure is intimately linked to the dynamics of water molecules, which can be measured using Raman and infrared spectroscopies. The assignment of spectral peaks depends on whether they are collective modes or single molecule motions. Vibrational modes in liquids are usually considered to be associated to the motions of single molecules or small clusters. Using molecular dynamics simulations we find dispersive optical phonon-like modes in the librational and OH stretching bands. We argue that on subpicosecond time scales these modes propagate through water's hydrogen bond network over distances of up to two nanometers. In the long wavelength limit these optical modes exhibit longitudinal-transverse splitting, indicating the presence of coherent long range dipole-dipole interactions, as in ice. Our results indicate the dynamics of liquid water have more similarities to ice than previously thought.

  19. Binding energy for hydrogen-like atoms in the Nelson model without cutoffs

    E-Print Network [OSTI]

    Christian Hainzl; Masao Hirokawa; Herbert Spohn

    2003-12-10

    In the Nelson model particles interact through a scalar massless field. For hydrogen-like atoms there is a nucleus of infinite mass and charge $Ze$, $Z > 0$, fixed at the origin and an electron of mass $m$ and charge $e$. This system forms a bound state with binding energy $E_{\\rm bin} = me^4Z^2/2$ to leading order in $e$. We investigate the radiative corrections to the binding energy and prove upper and lower bounds which imply that $ E_{\\rm bin} = me^4 Z^2/2 + c_0 e^6 + \\Ow(e^7 \\ln e)$ with explicit coefficient $c_0$ and independent of the ultraviolet cutoff. $c_0$ can be computed by perturbation theory, which however is only formal since for the Nelson Hamiltonian the smallest eigenvalue sits exactly at the bottom of the continuous spectrum.

  20. Depth profiling analysis of solar wind helium collected in diamond-like carbon film from Genesis

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

    Bajo, Ken-ichi; Olinger, Chad T.; Jurewicz, Amy J.G.; Burnett, Donald S.; Sakaguchi, Isao; Suzuki, Taku; Itose, Satoru; Ishihara, Morio; Uchino, Kiichiro; Wieler, Rainer; et al

    2015-10-01

    The distribution of solar-wind ions in Genesis mission collectors, as determined by depth profiling analysis, constrains the physics of ion solid interactions involving the solar wind. Thus, they provide an experimental basis for revealing ancient solar activities represented by solar-wind implants in natural samples. We measured the first depth profile of ?He in a collector; the shallow implantation (peaking at more »is consistent with TRIM simulations using the observed ?He velocity distribution during the Genesis mission. It is therefore likely that all solar-wind elements heavier than H are completely intact in this Genesis collector and, consequently, the solar particle energy distributions for each element can be calculated from their depth profiles. Ancient solar activities and space weathering of solar system objects could be quantitatively reproduced by solar particle implantation profiles.« less

  1. Energy levels and radiative rates for transitions in Cr-like Co IV and Ni V

    E-Print Network [OSTI]

    Aggarwal, K M; Karpuškien?, R; Keenan, F P; Kisielius, R; Stancalie, V

    2015-01-01

    We report calculations of energy levels and radiative rates ($A$-values) for transitions in Cr-like Co IV and Ni V. The quasi-relativistic Hartree-Fock (QRHF) code is adopted for calculating the data although GRASP (general-purpose relativistic atomic structure package) and flexible atomic code (FAC) have also been employed for comparison purposes. No radiative rates are available in the literature to compare with our results, but our calculated energies are in close agreement with those compiled by NIST for a majority of the levels. However, there are discrepancies for a few levels of up to 3\\%. The $A$-values are listed for all significantly contributing E1, E2 and M1 transitions, and the corresponding lifetimes reported, although unfortunately no previous theoretical or experimental results exist to compare with our data.

  2. Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb?¹ of pp? collisions

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

    Abazov, V. M.; Abbott, B.; Acharya, B. S.; Adams, M.; Adams, T.; Alexeev, G. D.; Alkhazov, G.; Alton, A.; Alverson, G.; Alves, G. A.; et al

    2011-09-16

    We present an updated measurement of the anomalous like-sign dimuon charge asymmetry Absl for semileptonic b-hadron decays in 9.0 fb?¹ of pp? collisions recorded with the D0 detector at a center-of-mass energy of ?s=1.96 TeV at the Fermilab Tevatron collider. We obtain Absl=(-0.787±0.172(stat)±0.093(syst))%. This result differs by 3.9 standard deviations from the prediction of the standard model and provides evidence for anomalously large CP violation in semileptonic neutral B decay. The dependence of the asymmetry on the muon impact parameter is consistent with the hypothesis that it originates from semileptonic b-hadron decays.

  3. Nuclear recoil effect in the Lamb shift of light hydrogen-like atoms

    E-Print Network [OSTI]

    Yerokhin, V A

    2015-01-01

    We report high-precision calculations of the nuclear recoil effect to the Lamb shift of hydrogen-like atoms to the first order in the electron-nucleus mass ratio and to all orders in the nuclear binding strength parameter $Z\\alpha$. The results are in excellent agreement with the known terms of the $Z\\alpha$ expansion and allow an accurate identification of the nonperturbative higher-order remainder. For hydrogen, the higher-order remainder was found to be much larger than anticipated. This result resolves the long-standing disagreement between the numerical all-order and the analytical $Z\\alpha$-expansion approaches to the recoil effect and completely removes the second-largest theoretical uncertainty in the hydrogen Lamb shift of the $1S$ and $2S$ states.

  4. A twistor-like D=10 superparticle action with manifest N=8 world-line supersymmetry

    E-Print Network [OSTI]

    A. Galperin; E. Sokatchev

    1992-03-18

    We propose a new formulation of the $D=10$ Brink-Schwarz superparticle which is manifestly invariant under both the target-space super-Poincar\\'e group and the world-line local $N=8$ superconformal group. This twistor-like construction naturally involves the sphere $S^8$ as a coset space of the $D=10$ Lorentz group. The action contains only a finite set of auxiliary fields, but they appear in unusual trilinear combinations. The origin of the on-shell $D=10$ fermionic $\\kappa$ symmetry of the standard Brink-Schwarz formulation is explained. The coupling to a $D=10$ super-Maxwell background requires a new mechanism, in which the electric charge appears only on shell as an integration constant.

  5. Is the Pale Blue Dot unique? Optimized photometric bands for identifying Earth-like exoplanets

    E-Print Network [OSTI]

    Krissansen-Totton, Joshua; Charnay, Benjamin; Arney, Giada; Robinson, Tyler D; Meadows, Victoria; Catling, David C

    2015-01-01

    The next generation of ground and space-based telescopes will image habitable planets around nearby stars. A growing literature describes how to characterize such planets with spectroscopy, but less consideration has been given to the usefulness of planet colors. Here, we investigate whether potentially Earth-like exoplanets could be identified using UV-visible-to-NIR wavelength broadband photometry (350-1000 nm). Specifically, we calculate optimal photometric bins for identifying an exo-Earth and distinguishing it from uninhabitable planets including both Solar System objects and model exoplanets. The color of some hypothetical exoplanets - particularly icy terrestrial worlds with thick atmospheres - is similar to Earth's because of Rayleigh scattering in the blue region of the spectrum. Nevertheless, subtle features in Earth's reflectance spectrum appear to be unique. In particular, Earth's reflectance spectrum has a 'U-shape' unlike all our hypothetical, uninhabitable planets. This shape is partly biogenic...

  6. AP Theory III: Cone-like Graded SUSY, Dynamic Dark Energy and the YM Millenium Problem

    E-Print Network [OSTI]

    H. E. Winkelnkemper

    2010-03-26

    Artin Presentation Theory, (AP Theory), is a new, direct infusion, via pure braid theory, of discrete group theory, (i.e., symmetry in its purest form), into the theory of {\\it smooth} 4-manifolds, (i.e.,$(3+1)$-Quantum Gravity in its purest topological form), thus exhibiting the most basic, rigorous, universal, model-free intrinsic {\\it gauge-gravity} duality in a non-infinitesimal, cone-like graded, as holographic as possible, model-independent, non-perturbative, background-independent, parameter-free manner. {\\it In AP Theory even smooth topology change becomes gauge-theoretic, setting the stage for a rigorous smooth topological $(3+1)$-QFT of Dynamic Dark Energy.} In this theory, the rigid $\\infty$ of the dimension of classical Hilbert space is substituted by the dynamic $\\infty$ of the $\\infty$ generation at each stage of a cone-like graded subgroup of topology-changing transitions/interactions. As a corollary, the Cosmological Constant problem and the YM Millenium Mass Gap problem, two of the most perplexing main problems of modern physics, become rigorously, intimately mathematically related, by having the same qualitative {\\it dynamical} roots. Ultimately our main point is meta-mathematical, as far as modern physics is concerned: due to the discrete group-theoretic conceptual simplicity of the theory, with its group-theoretic 'Planckian membrane/discreteness' starting point, {\\it the fact that it is not just a mere mathematical model,} and all its properties above, any other {\\it mathematically rigorous} approach has to built on AP Theory and be topologically absorbed and enveloped by it.

  7. Electron density diagnostic for hot plasmas in coronal regime by using B-like ions

    E-Print Network [OSTI]

    Guiyun Liang; Gang Zhao

    2008-03-14

    Line ratio of $3d-2p$ transition lines in boron-like spectra of Si X, S XII, Ar XIV and Fe XXII has been investigated. Collisional-radiative model calculations reveal that the line ratio is sensitive to the electron density in ranges of $n_{\\rm e}=4.0\\times10^7-3.0\\times10^{10}$ cm$^{-3}$, $4.0\\times10^8-3.0\\times10^{11}$ cm$^{-3}$, $3.0\\times10^9-4.0\\times10^{12}$ cm$^{-3}$ and $2.0\\times10^{12}-3.0\\times10^{15}$ cm$^{-3}$, respectively. This complements the K-shell diagnostics of helium-like ions. By comparison between the prediction and the measured values, effective electron densities in the electron beam ion trap (EBIT) plasmas performed by Lepson and collaborators at Lawrence Livermore EBIT, are estimated to be $n_{\\rm e}=3.4^{+0.8}_{-0.6}\\times10^{10}$ cm$^{-3}$ and $5.6^{+1.0}_{-1.1}\\times10^{10}$ cm$^{-3}$ for sulphur and argon plasmas. In case of argon, a good agreement is shown with the actual electron density derived from N VI K-shell spectrum. We further explore the $3d-2p$ transition lines of Si X and S XII in the stellar coronal spectra measured with the Low Energy Transmission Grating Spectrometer combined with High Resolution Camera on board the {\\it Chandra X-ray Observatory}. The constrained electron densities show a good agreement with the those determined from C V and O VII K-shell spectra.

  8. Quantum-like gravity waves and vortices in a classical fluid

    E-Print Network [OSTI]

    Laurent Nottale

    2009-01-09

    We have recently proposed a new general concept of macroscopic quantum-type experiment. It amounts to transform a classical fluid into a quantum-type fluid by the application of a quantum-like potential, either directly in a stationary configuration, or through a retro-active loop to simulate the time evolution. In this framework, the amplitude of the quantum potential depends on a macroscopic generalization of the Planck constant, which can be changed during the experiment, therefore simulating a quantum to classical transition. The experiment is exemplified here by an application of this concept to gravity waves at the surface of an incompressible liquid in a basin of finite height, with particular emphasis on the quantized vortex. We construct a complex wave function with the height of the fluid in the basin as its square modulus and the velocity potential as its phase. This wave function is solution of a nonlinear Schrodinger equation typical of superfluids. The quantum potential is therefore defined here in terms of the square root of the fluid height. We suggest two methods for applying this quantum-like potential to the fluid: (i) by the action of a force on the surface (wind, blower, pressure, field, etc...); (ii) by a curvature of the basin ground. In this last case the ground profile yields the quantum potential itself, while usually only the quantum force is accessible, so that such an experiment is expected to provide one with a macroscopic model of a quantum-type vacuum energy. These results may also be relevant to the study of freak waves, which have already been described by nonlinear Schrodinger equations.

  9. Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. UNCERTAINTY ANALYSIS OF DIOXIN-LIKE POLYCHLORINATED BIPHENYLS-RELATED TOXIC E..

    E-Print Network [OSTI]

    Jackson, Don

    permission. UNCERTAINTY ANALYSIS OF DIOXIN-LIKE POLYCHLORINATED BIPHENYLS-RELATED TOXIC E.. Satyendra P

  10. Physicochemical characterization of PEG-based comb-like amphiphilic copolymer structures for possible imaging and therapeutic applications

    E-Print Network [OSTI]

    Dawson, Jin Zhou

    2008-01-01

    Comb-like copolymer structures, also known as graft/comb copolymers, have obtained a significant amount of attention in biomedical and industrial applications because of their unique compositional flexibility, which can ...

  11. Streptococcus iniae M-Like Protein Contributes to Virulence in Fish and Is a Target for Live Attenuated

    E-Print Network [OSTI]

    Nizet, Victor

    of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo, Egypt, 4 Kent SeaTech Corporation-like regulatory gene, mgx. In contrast to the Mga locus of group A Streptococcus (GAS, S. pyogenes), scp

  12. High yield production of inorganic graphene-like materials (MoS?, WS?, BN) through liquid exfoliation testing key parameters

    E-Print Network [OSTI]

    Pu, Fei, S.B. Massachusetts Institute of Technology

    2012-01-01

    Inorganic graphene-like materials such as molybdenum disulfide (MoS?), tungsten sulfide (WS?), and boron nitride (BN) are known to have electronic properties. When exfoliated into layers and casted onto carbon nanofilms, ...

  13. Search for Higgs boson like high mass resonances in the bosonic decay channels with ATLAS and CMS

    E-Print Network [OSTI]

    Lo Sterzo, Francesco; The ATLAS collaboration

    2015-01-01

    Searches for an additional heavy Higgs-like boson have been performed by both ATLAS and CMS with data collected in the Run 1 of the LHC. This document reports searches in the diboson decay channels ($\\gamma\\gamma$, $WW$, $ZZ$). Exclusion limits have been set for different hypotheses: model independent narrow-resonance, Standard Model-like Higgs, Electroweak Singlet and 2HDM. No excesses are found over the Standard Model background-only expectation.

  14. Evidence for graphite-like hexagonal AlN nanosheets epitaxially grown on single crystal Ag(111)

    SciTech Connect (OSTI)

    Tsipas, P.; Kassavetis, S.; Tsoutsou, D.; Xenogiannopoulou, E.; Golias, E.; Giamini, S. A.; Dimoulas, A.; Grazianetti, C.; Fanciulli, M.; Dipartimento di Scienza dei Materiali, Università degli Studi di Milano Bicocca, I-20126, Milano ; Chiappe, D.; Molle, A.

    2013-12-16

    Ultrathin (sub-monolayer to 12 monolayers) AlN nanosheets are grown epitaxially by plasma assisted molecular beam epitaxy on Ag(111) single crystals. Electron diffraction and scanning tunneling microscopy provide evidence that AlN on Ag adopts a graphite-like hexagonal structure with a larger lattice constant compared to bulk-like wurtzite AlN. This claim is further supported by ultraviolet photoelectron spectroscopy indicating a reduced energy bandgap as expected for hexagonal AlN.

  15. A Godunov-like point-centered essentially Lagrangian hydrodynamic approach

    SciTech Connect (OSTI)

    Morgan, Nathaniel R.; Waltz, Jacob I.; Burton, Donald E.; Charest, Marc R.; Canfield, Thomas R.; Wohlbier, John G.

    2014-10-28

    We present an essentially Lagrangian hydrodynamic scheme suitable for modeling complex compressible flows on tetrahedron meshes. The scheme reduces to a purely Lagrangian approach when the flow is linear or if the mesh size is equal to zero; as a result, we use the term essentially Lagrangian for the proposed approach. The motivation for developing a hydrodynamic method for tetrahedron meshes is because tetrahedron meshes have some advantages over other mesh topologies. Notable advantages include reduced complexity in generating conformal meshes, reduced complexity in mesh reconnection, and preserving tetrahedron cells with automatic mesh refinement. A challenge, however, is tetrahedron meshes do not correctly deform with a lower order (i.e. piecewise constant) staggered-grid hydrodynamic scheme (SGH) or with a cell-centered hydrodynamic (CCH) scheme. The SGH and CCH approaches calculate the strain via the tetrahedron, which can cause artificial stiffness on large deformation problems. To resolve the stiffness problem, we adopt the point-centered hydrodynamic approach (PCH) and calculate the evolution of the flow via an integration path around the node. The PCH approach stores the conserved variables (mass, momentum, and total energy) at the node. The evolution equations for momentum and total energy are discretized using an edge-based finite element (FE) approach with linear basis functions. A multidirectional Riemann-like problem is introduced at the center of the tetrahedron to account for discontinuities in the flow such as a shock. Conservation is enforced at each tetrahedron center. The multidimensional Riemann-like problem used here is based on Lagrangian CCH work [8, 19, 37, 38, 44] and recent Lagrangian SGH work [33-35, 39, 45]. In addition, an approximate 1D Riemann problem is solved on each face of the nodal control volume to advect mass, momentum, and total energy. The 1D Riemann problem produces fluxes [18] that remove a volume error in the PCH discretization. A 2-stage Runge–Kutta method is used to evolve the solution in time. The details of the new hydrodynamic scheme are discussed; likewise, results from numerical test problems are presented.

  16. A Godunov-like point-centered essentially Lagrangian hydrodynamic approach

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

    Morgan, Nathaniel R.; Waltz, Jacob I.; Burton, Donald E.; Charest, Marc R.; Canfield, Thomas R.; Wohlbier, John G.

    2014-10-28

    We present an essentially Lagrangian hydrodynamic scheme suitable for modeling complex compressible flows on tetrahedron meshes. The scheme reduces to a purely Lagrangian approach when the flow is linear or if the mesh size is equal to zero; as a result, we use the term essentially Lagrangian for the proposed approach. The motivation for developing a hydrodynamic method for tetrahedron meshes is because tetrahedron meshes have some advantages over other mesh topologies. Notable advantages include reduced complexity in generating conformal meshes, reduced complexity in mesh reconnection, and preserving tetrahedron cells with automatic mesh refinement. A challenge, however, is tetrahedron meshesmore »do not correctly deform with a lower order (i.e. piecewise constant) staggered-grid hydrodynamic scheme (SGH) or with a cell-centered hydrodynamic (CCH) scheme. The SGH and CCH approaches calculate the strain via the tetrahedron, which can cause artificial stiffness on large deformation problems. To resolve the stiffness problem, we adopt the point-centered hydrodynamic approach (PCH) and calculate the evolution of the flow via an integration path around the node. The PCH approach stores the conserved variables (mass, momentum, and total energy) at the node. The evolution equations for momentum and total energy are discretized using an edge-based finite element (FE) approach with linear basis functions. A multidirectional Riemann-like problem is introduced at the center of the tetrahedron to account for discontinuities in the flow such as a shock. Conservation is enforced at each tetrahedron center. The multidimensional Riemann-like problem used here is based on Lagrangian CCH work [8, 19, 37, 38, 44] and recent Lagrangian SGH work [33-35, 39, 45]. In addition, an approximate 1D Riemann problem is solved on each face of the nodal control volume to advect mass, momentum, and total energy. The 1D Riemann problem produces fluxes [18] that remove a volume error in the PCH discretization. A 2-stage Runge–Kutta method is used to evolve the solution in time. The details of the new hydrodynamic scheme are discussed; likewise, results from numerical test problems are presented.« less

  17. Instabilities in a simplified Fermi-like model with Krook-type collisions, intrinsic damping, and a source

    SciTech Connect (OSTI)

    Zale?ny, J. [West Pomeranian University of Technology, Institute of Physics, 70-310 Szczecin (Poland)] [West Pomeranian University of Technology, Institute of Physics, 70-310 Szczecin (Poland)

    2013-08-15

    Plasma micro-instabilities have been investigated numerically using a simplified Fermi-like model extended to include also a Krook-type collision operator containing a source plus collisions and a phenomenologically introduced intrinsic damping. In this simplified Fermi-like model, the wave is modeled as a single potential well. The resonant wave-particle interaction occurs due to bounces of the particles trapped between the well barriers, the height of which depends on the energy exchange between the particles and the wave. A fast numerical algorithm is used for solving the simplified Fermi-like model with the source and the relaxation processes and is briefly described and the obtained numerical results are presented and discussed. The main observation is that the presence of the source and the Krook-type collisions tends to suppress the process of filamentation in phase space and to restore the initial distribution function with free energy. In the Fermi like model including source and collisions, the steady state of the wave amplitude is achieved only due to the presence of the damping in the system. This is different from the collisionless case, when the steady state is achieved due to phase mixing. Some remarks in the end of the paper compare the results of the Fermi-like model with those of the analytical Berk-Breizman model, which inspired the extension of the Fermi-like model to include a source, collisions, and damping.

  18. A catalog of visual-like morphologies in the 5 CANDELS fields using deep-learning

    E-Print Network [OSTI]

    Huertas-Company, M; Cabrera-Vives, G; Pérez-González, P G; Kartaltepe, J S; Barro, G; Bernardi, M; Mei, S; Shankar, F; Dimauro, P; Bell, E F; Kocevski, D; Koo, D C; Faber, S M; Mcintosh, D H

    2015-01-01

    We present a catalog of visual like H-band morphologies of $\\sim50.000$ galaxies ($H_{f160w}\\sim1.25$. The algorithm is trained on GOODS-S for which visual classifications are publicly available and then applied to the other 4 fields. Following the CANDELS main morphology classification scheme, our model retrieves the probabilities for each galaxy of having a spheroid, a disk, presenting an irregularity, being compact or point source and being unclassifiable. ConvNets are able to predict the fractions of votes given a galaxy image with zero bias and $\\sim10\\%$ scatter. The fraction of miss-classifications is less than $1\\%$. Our classification scheme represents a major improvement with respect to CAS (Concentration-Asymmetry-Smoothness)-based methods, which hit a $20-30\\%$ contamination limit at high z. The catalog is released with the present paper via the $\\href{http://rainbowx.fis.ucm.es/Rainbow_navigator_public}{Rainbow\\,database}$

  19. Structural formation of huntingtin-like aggregates probed by small-angle neutron scattering

    SciTech Connect (OSTI)

    Stanley, Christopher B [ORNL; Perevozchikova, Tatiana [ORNL; Berthelier-Jung, Valerie M [ORNL

    2011-01-01

    In several neurodegenerative disorders, including Huntington s disease (HD), aspects concerning the earliest of protein structures that form along the aggregation pathway have increasingly gained attention since these particular species are likely to be neurotoxic. We used time-resolved small-angle neutron scattering (SANS) to probe in solution these transient structures formed by peptides having the N-terminal sequence context of mutant huntingtin (Htt) exon 1. We obtained snapshots of the formed aggregates as the kinetic reaction ensued to yield quantitative information on their size and mass. At the early stage, small precursor species with an initial radius of gyration (Rg) of 16.1 5.9 and average mass of a dimer to trimer were monitored. Structural growth was treated as two modes with a transition from three-dimensional early aggregate formation to two-dimensional fibril growth and association. Our SANS results on the internal structure of the mature fibrils demonstrate loose packing with about 1 peptide per 4.75 -sheet repeat distance, which is shown to be quantitatively consistent with a -helix model. This research provides new insights into the structures forming along the pathway of Htt exon 1 aggregation and should assist in determining the role that precursors play in neuronal toxicity.

  20. Color dispersion and Milky-Way-like reddening among type Ia supernovae

    SciTech Connect (OSTI)

    Scolnic, Daniel M.; Riess, Adam G.; Rodney, Steven A.; Brout, Dillon J.; Jones, David O. [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 (United States); Foley, Ryan J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Rest, Armin [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)

    2014-01-01

    Past analyses of Type Ia supernovae have identified an irreducible scatter of 5%-10% in distance, widely attributed to an intrinsic dispersion in luminosity. Another equally valid source of this scatter is intrinsic dispersion in color. Misidentification of the true source of this scatter can bias both the retrieved color-luminosity relation and cosmological parameter measurements. The size of this bias depends on the magnitude of the intrinsic color dispersion relative to the distribution of colors that correlate with distance. We produce a realistic simulation of a misattribution of intrinsic scatter and find a negative bias in the recovered color-luminosity relation, ?, of ?? ? –1.0 (?33%) and a positive bias in the equation of state parameter, w, of ?w ? +0.04 (?4%). We re-analyze current published datasets with the assumption that the distance scatter is predominantly the result of color. Unlike previous analyses, we find that the data are consistent with a Milky-Way-like reddening law (R{sub V} = 3.1) and that a Milky-Way dust model better predicts the asymmetric color-luminosity trends than the conventional luminosity scatter hypothesis. We also determine that accounting for color variation reduces the correlation between various host galaxy properties and Hubble residuals by ?20%.

  1. Self-propelled Worm-like Filaments: Spontaneous Spiral Formation, Structure, and Dynamics

    E-Print Network [OSTI]

    Rolf E. Isele-Holder; Jens Elgeti; Gerhard Gompper

    2015-08-06

    Worm-like filaments that are propelled homogeneously along their tangent vector are studied by Brownian dynamics simulations. Systems in two dimensions are investigated, corresponding to filaments adsorbed to interfaces or surfaces. A large parameter space covering weak and strong propulsion, as well as flexible and stiff filaments is explored. For strongly propelled and flexible filaments, the free-swimming filaments spontaneously form stable spirals. The propulsion force has a strong impact on dynamic properties, such as the rotational and translational mean square displacement and the rate of conformational sampling. In particular, when the active self-propulsion dominates thermal diffusion, but is too weak for spiral formation, the rotational diffusion coefficient has an activity-induced contribution given by $v_c/\\xi_P$, where $v_c$ is the contour velocity and $\\xi_P$ the persistence length. In contrast, structural properties are hardly affected by the activity of the system, as long as no spirals form. The model mimics common features of biological systems, such as microtubules and actin filaments on motility assays or slender bacteria, and artificially designed microswimmers.

  2. Determining global parameters of the oscillations of solar-like stars

    E-Print Network [OSTI]

    Mathur, S; Regulo, C; Creevey, P L; Ballot, J; Salabert, D; Arentoft, T; Quirion, P -O; Chaplin, W J; Kjeldsen, H

    2009-01-01

    Helioseismology has enabled us to better understand the solar interior, while also allowing us to better constrain solar models. But now is a tremendous epoch for asteroseismology as space missions dedicated to studying stellar oscillations have been launched within the last years (MOST and CoRoT). CoRoT has already proved valuable results for many types of stars, while Kepler, which was launched in March 2009, will provide us with a huge number of seismic data very soon. This is an opportunity to better constrain stellar models and to finally understand stellar structure and evolution. The goal of this research work is to estimate the global parameters of any solar-like oscillating target in an automatic manner. We want to determine the global parameters of the acoustic modes (large separation, range of excited pressure modes, maximum amplitude, and its corresponding frequency), retrieve the surface rotation period of the star and use these results to estimate the global parameters of the star (radius and ma...

  3. A Search for Subkilometer-sized Ordinary Chondrite Like Asteroids in the Main-Belt

    E-Print Network [OSTI]

    Lin, H W; Chen, Y T; Ip, W H; Chang, C K

    2015-01-01

    The size-dependent effects of asteroids on surface regolith and collisional lifetimes suggest that small asteroids are younger than large asteroids. In this study, we performed multicolor main-belt asteroid (MBA) survey by Subaru telescope/Suprime-Cam to search for subkilometer-sized ordinary chondrite (Q-type) like MBAs. The total survey area was 1.5 deg^2 near ecliptic plane and close to the opposition. We detected 150 MBAs with 4 bands (B, V , R, I) in this survey. The range of absolute magnitude of detected asteroids was between 13 and 22 magnitude, which is equivalent to the size range of kilometer to sub-kilometer diameter in MBAs. From this observation, 75 of 150 MBAs with color uncertainty less than 0.1 were used in the spectral type analysis, and two possible Q-type aster- oids were detected. This mean that the Q-type to S-type ratio in MBAs is < 0.05. Meanwhile, the Q/S ratio in near Earth asteroids (NEAs) has been estimated to be 0.5 to 2 (Binzel et al., 2004; Dandy et al., 2003). Therefore, Q-t...

  4. Method for loading lipid like vesicles with drugs of other chemicals

    DOE Patents [OSTI]

    Mehlhorn, Rolf Joachim (Richmond, CA)

    1998-01-01

    A method for accumulating drugs or other chemicals within synthetic, lipid-like vesicles by means of a pH gradient imposed on the vesicles just prior to use is described. The method is suited for accumulating molecules with basic or acid moieties which are permeable to the vesicles membranes in their uncharged form and for molecules that contain charge moieties that are hydrophobic ions and can therefore cross the vesicle membranes in their charged form. The method is advantageous over prior art methods for encapsulating biologically active materials within vesicles in that is achieves very high degrees of loading with simple procedures that are economical and require little technical expertise, furthermore kits which can be stored for prolonged periods prior to use without impairment of the capacity to achieve drug accumulation are described. A related application of the method consists of using this technology to detoxify animals that have been exposed to poisons with basic, weak acid or hydrophobic charge groups within their molecular structures.

  5. Comparison of ICRF and NBI heated plasmas performances in the JET ITER-like wall

    SciTech Connect (OSTI)

    Mayoral, M.-L. [EFDA Close Support Unit, Garching, Germany and Euratom/CCFE Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Pütterich, T.; Bobkov, V. [Max-Planck-Institut für Plasmaphysik, EURATOM-Assoziation, Garching (Germany); Jacquet, P. [Euratom/CCFE Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Lerche, E.; Van-Eester, D.; Bourdelle, C.; Colas, L. [CEA, IRFM, F-13108 Saint-Paul-Lez-Durance (France); Czarnecka, A. [Association Euratom-IPPLM, Hery 23, 01-497 Warsaw (Poland); Mlynar, J. [Association Euratom-IPP.CR, Institute of Plasma Physics AS CR, 18200 Prague (Czech Republic); Neu, R. [EFDA Close Support Unit, Garching, Germany and Max-Planck-Institut für Plasmaphysik, EURATOM-Assoziation, Garching (Germany); Collaboration: JET-EFDA Contributors

    2014-02-12

    During the initial operation of the JET ITER-like wall, particular attention was given to the characterization of the Ion Cyclotron Resonance Frequency (ICRF) heating in this new metallic environment. In this contribution we compare L-modes plasmas heated by ICRF or by Neutral Beam Injection (NBI). ICRF heating as expected led to a much higher centrally peaked power deposition on the electrons and due to the central fast ion population to stronger sawtooth activity. Surprisingly, although a higher bulk radiation was observed during the ICRF phase, the thermal plasma energy was found similar for both cases, showing that a higher radiation inside the separatrix was not incompatible with an efficient central heating scheme. The higher radiation was attributed to the presence Tungsten (W). Tomographic inversion of SXR emissions allowed a precise observation of the sawtooth effect on the radiation pattern. W concentration profiles deconvolved from SXR emission showed the flattening of the profiles due to sawtooth for both heating and the peaking of the profiles in the NBI case only hinting for extra transport effect in the ICRF case.

  6. Measurement of adiabatic burning velocity in natural gas-like mixtures

    SciTech Connect (OSTI)

    Ratna Kishore, V.; Duhan, Nipun; Ravi, M.R.; Ray, Anjan

    2008-10-15

    Experimental measurements of the adiabatic burning velocities were carried out for natural gas-like mixtures burning in air over a range of equivalence ratios at atmospheric pressure. Effect of CO{sub 2} dilution up to 60%, N{sub 2} dilution up to 40% and 25% enrichment of ethane on burning velocity of methane-air flames were studied. Heat flux method with setup similar to that of [K.J. Bosschaart, L.P.H. de Goey, Detailed analysis of the heat flux method for measuring burning velocity, Combustion and Flame 132 (2003) 170-180] was used for measurement of burning velocities. Initially experiments were done for methane-air and ethane-air mixtures at various equivalence ratios and the results were in good agreement with published data in the literature. Computations were performed using PREMIX code with GRI 3.0 reaction mechanism for all the mixtures. Predicted flame structures were used to the explain the effect of N{sub 2} and CO{sub 2} dilution on burning velocity of methane-air flames. Peak burning velocity for CH{sub 4}/CO{sub 2}-air mixtures occur near to {phi} = 1.0. (author)

  7. Video Analysis and Modeling Performance Task to promote becoming like scientists in classrooms

    E-Print Network [OSTI]

    Wee, Loo Kang

    2015-01-01

    This paper aims to share the use of Tracker a free open source video analysis and modeling tool that is increasingly used as a pedagogical tool for the effective learning and teaching of Physics for Grade 9 Secondary 3 students in Singapore schools to make physics relevant to the real world. We discuss the pedagogical use of Tracker, guided by the Framework for K-12 Science Education by National Research Council, USA to help students to be more like scientists. For a period of 6 to 10 weeks, students use a video analysis coupled with the 8 practices of sciences such as 1. Ask question, 2. Use models, 3. Plan and carry out investigation, 4. Analyse and interpret data, 5. Use mathematical and computational thinking, 6. Construct explanations, 7. Argue from evidence and 8. Communicate information. This papers focus in on discussing some of the performance task design ideas such as 3.1 flip video, 3.2 starting with simple classroom activities, 3.3 primer science activity, 3.4 integrative dynamics and kinematics l...

  8. On the rotation period distribution of CoRoT and Kepler Sun-like stars

    E-Print Network [OSTI]

    Leao, I C; Lopes, C E Ferreira; Neves, V; Valcarce, A A R; de Oliveira, L L A; da Silva, D Freire; de Freitas, D B; Martins, B L Canto; Janot-Pacheco, E; Baglin, A; De Medeiros, J R

    2015-01-01

    We study the distribution of the photometric rotation period (Prot), which is a direct measurement of the surface rotation at active latitudes, for three subsamples of Sun-like stars: one from CoRoT data and two from Kepler data. We identify the main populations of these samples and interpret their main biases particularly for a comparison with the solar Prot. Prot and variability amplitude (A) measurements were obtained from public CoRoT and Kepler catalogs, which were combined with public data of physical parameters. Because these samples are subject to selection effects, we computed synthetic samples with simulated biases to compare with observations, particularly around the Sun's HR-diagram location. Theoretical grids and empirical relations were used to combine physical parameters with Prot and A. Biases were simulated by performing cutoffs on the physical and rotational parameters in the same way as in each observed sample. A crucial cutoff is related with the detectability of the rotational modulation,...

  9. Radio-loud Magnetars as Detectors for Axions and Axion-like Particles

    E-Print Network [OSTI]

    Doron Chelouche; Eduardo I. Guendelman

    2012-02-01

    We show that, by studying the arrival times of radio pulses from highly-magnetized transient beamed sources, it may be possible to detect light pseudo-scalar particles, such as axions and axion-like particles, whose existence could have considerable implications for the strong-CP problem of QCD as well as the dark matter problem in cosmology. Specifically, such light bosons may be detected with a much greater sensitivity, over a broad particle mass range, than is currently achievable by terrestrial experiments, and using indirect astrophysical considerations. The observable effect was discussed in Chelouche & Guendelman (2009), and is akin to the Stern-Gerlach experiment: the splitting of a photon beam naturally arises when finite coupling exists between the electro-magnetic field and the axion field. The splitting angle of the light beams linearly depends on the photon wavelength, the size of the magnetized region, and the magnetic field gradient in the transverse direction to the propagation direction of the photons. If radio emission in radio-loud magnetars is beamed and originates in regions with strong magnetic field gradients, then splitting of individual pulses may be detectable. We quantify the effect for a simplified model for magnetars, and search for radio beam splitting in the 2\\,GHz radio light curves of the radio loud magnetar XTE\\,J1810-197.

  10. Crystal structure of enterococcus faecalis sly A-like transcriptional factor.

    SciTech Connect (OSTI)

    Wu, R.; Zhang, R.; Zagnitko, O.; Dementieva, I.; Maltsev, N.; Watson, J. D.; Laskowski, R.; Gornicki, P.; Joachimiak, A.; Univ. of Chicago; European Bioinformatics Inst.

    2003-05-30

    The crystal structure of a SlyA transcriptional regulator at 1.6 {angstrom} resolution is presented, and structural relationships between members of the MarR/SlyA family are discussed. The SlyA family, which includes SlyA, Rap, Hor, and RovA proteins, is widely distributed in bacterial and archaeal genomes. Current evidence suggests that SlyA-like factors act as repressors, activators, and modulators of gene transcription. These proteins have been shown to up-regulate the expression of molecular chaperones, acid-resistance proteins, and cytolysin, and down-regulate several biosynthetic enzymes. The structure of SlyA from Enterococcus faecalis, determined as a part of an ongoing structural genomics initiative (www.mcsg.anl.gov), revealed the same winged helix DNA-binding motif that was recently found in the MarR repressor from Escherichia coli and the MexR repressor from Pseudomonas aeruginosa, a sequence homologue of MarR. Phylogenetic analysis of the MarR/SlyA family suggests that Sly is placed between the SlyA and MarR subfamilies and shows significant sequence similarity to members of both subfamilies.

  11. CONSTRAINTS ON AXION-LIKE PARTICLES FROM X-RAY OBSERVATIONS OF THE HYDRA GALAXY CLUSTER

    SciTech Connect (OSTI)

    Wouters, Denis; Brun, Pierre, E-mail: denis.wouters@cea.fr, E-mail: pierre.brun@cea.fr [CEA, Irfu, Centre de Saclay, F-91191 Gif-sur-Yvette (France)

    2013-07-20

    Axion-like particles (ALPs) belong to a class of new pseudoscalar particles that generically couple to photons, opening the possibility of oscillations from photons into ALPs in an external magnetic field. Having witnessed the turbulence of their magnetic fields, these oscillations are expected to imprint irregularities on a limited energy range of the spectrum of astrophysical sources. In this study, Chandra observations of the Hydra galaxy cluster are used to constrain the value of the coupling of ALPs to photons. We consider the conversion of X-ray photons from the central source Hydra A in the magnetic field of the cluster. The magnetic field strength and structure are well determined observationally, which adds to the robustness of the analysis. The absence of anomalous irregularities in the X-ray spectrum of Hydra A conservatively provides the most competitive constraints on the coupling constant for ALP masses below 7 Multiplication-Sign 10{sup -12} eV at the level of g{sub {gamma}a} < 8.3 Multiplication-Sign 10{sup -12} GeV{sup -1} at the 95% confidence level. Because of the specific phenomenology involved, these constraints actually hold more generally for very light pseudo-Nambu-Goldstone bosons.

  12. Signatures of photon and axion-like particle mixing in the gamma-ray burst jet

    E-Print Network [OSTI]

    Olga Mena; Soebur Razzaque; F. Villaescusa-Navarro

    2011-02-07

    Photons couple to Axion-Like Particles (ALPs) or more generally to any pseudo Nambu-Goldstone boson in the presence of an external electromagnetic field. Mixing between photons and ALPs in the strong magnetic field of a Gamma-Ray Burst (GRB) jet during the prompt emission phase can leave observable imprints on the gamma-ray polarization and spectrum. Mixing in the intergalactic medium is not expected to modify these signatures for ALP mass > 10^(-14) eV and/or for gamma ray emission. We also show that when the magnetic field orientation in the propagation region is perpendicular to the field orientation in the production region, the observed synchrotron spectrum becomes steeper than the theoretical prediction and as detected in a sizable fraction of GRB sample. Detection of the correlated polarization and spectral signatures from these steep-spectrum GRBs by gamma-ray polarimeters can be a very powerful probe to discover ALPs. Measurement of gamma-ray polarization from GRBs in general, with high statistics, can also be useful to search for ALPs.

  13. Advanced Characterization of Molecular Interactions in TALSPEAK-like Separations Systems

    SciTech Connect (OSTI)

    Nash, Kenneth; Guelis, Artem; Lumetta, Gregg J.; Sinkov, Sergey

    2015-10-21

    Combining unit operations in advanced aqueous reprocessing schemes brings obvious process compactness advantages, but at the same time greater complexity in process design and operation. Unraveling these interactions requires increasingly sophisticated analytical tools and unique approaches for adequate analysis and characterization that probe molecular scale interactions. Conventional slope analysis methods of solvent extraction are too indirect to provide much insight into such interactions. This project proposed the development and verification of several analytical tools based on studies of TALSPEAK-like aqueous processes. As such, the chemistry of trivalent fission product lanthanides, americium, curium, plutonium, neptunium and uranium figure prominently in these studies. As the project was executed, the primary focus fell upon the chemistry or trivalent lanthanides and actinides. The intent of the investigation was to compare and contrast the results from these various complementary techniques/studies to provide a stronger basis for predicting the performance of extractant/diluent mixtures as media for metal ion separations. As many/most of these techniques require the presence of metal ions at elevated concentrations, it was expected that these studies would take this investigation into the realm of patterns of supramolecular organization of metal complexes and extractants in concentrated aqueous/organic media. We expected to advance knowledge of the processes that enable and limit solvent extraction reactions as a result of the application of fundamental chemical principles to explaining interactions in complex media.

  14. Quantum thermodynamic Carnot and Otto-like cycles for a two-level system

    E-Print Network [OSTI]

    Beretta, G P

    2007-01-01

    From the thermodynamic equilibrium properties of a two-level system with variable energy-level gap $\\Delta$, and a careful distinction between the Gibbs relation $dE = T dS + (E/\\Delta) d\\Delta$ and the energy balance equation $dE = \\delta Q^\\leftarrow - \\delta W^\\to$, we infer some important aspects of the second law of thermodynamics and, contrary to a recent suggestion based on the analysis of an Otto-like thermodynamic cycle between two values of $\\Delta$ of a spin-1/2 system, we show that a quantum thermodynamic Carnot cycle, with the celebrated optimal efficiency $1 - (T_{low}/T_{high})$, is possible in principle with no need of an infinite number of infinitesimal processes, provided we cycle smoothly over at least three (in general four) values of $\\Delta$, and we change $\\Delta$ not only along the isoentropics, but also along the isotherms, e.g., by use of the recently suggested maser-laser tandem technique. We derive general bounds to the net-work to high-temperature-heat ratio for a Carnot cycle and...

  15. Extended space expectation values of position related operators for hydrogen-like quantum system evolutions

    SciTech Connect (OSTI)

    Kalay, Berfin; Demiralp, Metin

    2014-10-06

    The expectation value definitions over an extended space from the considered Hilbert space of the system under consideration is given in another paper of the second author in this symposium. There, in that paper, the conceptuality rather than specification is emphasized on. This work uses that conceptuality to investigate the time evolutions of the position related operators' expectation values not in its standard meaning but rather in a new version of the definition over not the original Hilbert space but in the space obtained by extensions via introducing the images of the given initial wave packet under the positive integer powers of the system Hamiltonian. These images may not be residing in the same space of the initial wave packet when certain singularities appear in the structure of the system Hamiltonian. This may break down the existence of the integrals in the definitions of the expectation values. The cure is the use of basis functions in the abovementioned extended space and the sandwiching of the target operator whose expectation value is under questioning by an appropriately chosen operator guaranteeing the existence of the relevant integrals. Work specifically focuses on the hydrogen-like quantum systems whose Hamiltonians contain a polar singularity at the origin.

  16. Factors influencing the microwave pulse duration in a klystron-like relativistic backward wave oscillator

    SciTech Connect (OSTI)

    Xiao Renzhen; Zhang Xiaowei; Zhang Ligang; Li Xiaoze; Zhang Lijun [National Key Laboratory of Science and Technology on High Power Microwave, Northwest Institute of Nuclear Technology, Xi'an 710024 (China)

    2012-07-15

    In this paper, we analyze the factors that affect the microwave pulse duration in a klystron-like relativistic backward wave oscillator (RBWO), including the diode voltage, the guiding magnetic field, the electron beam collector, the extraction cavity, and the gap between the electron beam and the slow wave structure (SWS). The results show that the microwave pulse duration increases with the diode voltage until breakdown occurs on the surface of the extraction cavity. The pulse duration at low guiding magnetic field is generally 5-10 ns smaller than that at high magnetic field due to the asymmetric electron emission and the larger energy spread of the electron beam. The electron beam collector can affect the microwave pulse duration significantly because of the anode plasma generated by bombardment of the electron beam on the collector surface. The introduction of the extraction cavity only slightly changes the pulse duration. The decrease of the gap between the electron beam and the SWS can increase the microwave pulse duration greatly.

  17. Some Quantum-Like Features of Mass Politics in Two-Party Systems

    E-Print Network [OSTI]

    Charles E. Smith Jr.; Christopher Zorn

    2011-07-05

    We expand the substantive terrain of QI's reach by illuminating a body of political theory that to date has been elaborated in strictly classical language and formalisms but has complex features that seem to merit generalizations of the problem outside the confines of classicality. The line of research, initiated by Fiorina in the 1980s, seeks to understand the origins and nature of party governance in two-party political systems wherein voters cast partisan ballots in two contests, one that determines partisan control of the executive branch and another that determines party control of a legislature. We describe how research in this area evolved in the last two decades in directions that bring it now to the point where further elaboration and study seem natural in the more general formalistic and philosophical environments embraced in QI research. In the process, we find evidence that a restriction of a classical model that has animated work in the field appears violated in a form that leads one naturally to embrace the superposition principle. We then connect classical distinctions between separable and nonseparable preferences that are common in political science to their quantum and quantum-like counterparts in the QI literature, finding special affinity for a recently-introduced understanding of the distinction that provides a passageway into the boundary between fully quantum and fully classical views of the distinction and thereby provides new leverage on existing work germane to the theory.

  18. Operation and coupling of LH waves with the ITER-like wall at JET

    E-Print Network [OSTI]

    Kirov, K K; Ekedahl, A; Petrzilka, V; Arnoux, G; Baranov, Yu; Brix, M; Goniche, M; Jachmich, S; Mayoral, M-L; Ongena, J; Rimini, F; Stamp, M; Contributors, JET EFDA

    2013-01-01

    In this paper important aspects of Lower Hybrid (LH) operation with the ITER Like Wall (ILW) [1] at JET are reported. Impurity release during LH operation was investigated and it was found that there is no significant Be increase with LH power. Concentration of W was analysed in more detail and it was concluded that LH contributes negligibly to its increase. No cases of W accumulation in LH-only heating experiments were observed so far. LH wave coupling was studied and optimised to achieve the level of system performance similar to before ILW installation. Measurements by Li-beam were used to study systematic dependencies of the SOL density on the gas injection rate from a dedicated gas introduction module and the LH power and launcher position. Experimental results are supported by SOL transport modelling. Observations of arcs in front of the LH launcher and hotspots on magnetically connected sections of the vessel are reported. Overall, a relatively troublefree operation of the LH system up to 2.5MW of coup...

  19. Frame independence of the inhomogeneous mixmaster chaos via Misner-Chitre-like variables

    SciTech Connect (OSTI)

    Benini, Riccardo [Dipartimento di Fisica, Universita di Bologna and INFN, Sezione di Bologna, via Irnerio 46, 40126 Bologna (Italy); Montani, Giovanni [Dipartimento di Fisica, Universita di Roma 'La Sapienza', Piazza Aldo Moro, 5 00185 Rome (Italy); ICRA-International Center for Relativistic Astrophysics, c/o Dipartimento di Fisica (G9), Universita di Roma 'La Sapienza', Piazza Aldo Moro, 5 00185 Rome (Italy)

    2004-11-15

    We outline the covariant nature, with respect to the choice of a reference frame, of the chaos characterizing the generic cosmological solution near the initial singularity, i.e., the so-called inhomogeneous mixmaster model. Our analysis is based on a gauge independent Arnowitt-Deser-Misner reduction of the dynamics to the physical degrees of freedom. The resulting picture shows how the inhomogeneous mixmaster model is isomorphic point by point in space to a billiard on a Lobachevsky plane. Indeed, the existence of an asymptotic (energylike) constant of the motion allows one to construct the Jacobi metric associated with the geodesic flow and to calculate a nonzero Lyapunov exponent in each space point. The chaos covariance emerges from the independence of our scheme with respect to the form of the lapse function and the shift vector; the origin of this result relies on the dynamical decoupling of the space points which takes place near the singularity, due to the asymptotic approach of the potential term to infinite walls. At the ground of the obtained dynamical scheme is the choice of Misner-Chitre-like variables which allows one to fix the billiard potential walls.

  20. Blue Wings and Bumps via Fermi-like Acceleration of Lyman-alpha photons across Shocks

    E-Print Network [OSTI]

    Chung, Andrew S; Ciardi, Benedetta; Gronke, Max

    2015-01-01

    We explore the impact of Fermi-like acceleration of Lyman-alpha (Ly{\\alpha}) photons across shock fronts on the observed Ly{\\alpha} spectral line shape. We first confirm the result of Neufeld & McKee (1988) that this mechanism gives rise to extended blue wings which may have been observed in some radio galaxies. Our Monte-Carlo radiative transfer calculations further show that in a minor modification of the shell-model, in which we add an additional static shell of hydrogen, this process can naturally explain the small blue bumps observed in a subset of Ly{\\alpha} emitting galaxies, which have been difficult to explain with conventional shell-models. Blue bumps can be produced with an additional column density of static hydrogen as small as $N_{HI}^{static} \\ll N_{HI}^{shell}$, and typically occur at roughly the outflow velocity of the shell. In our model the spectra of so-called 'blue-bump objects' might reflect an evolutionary stage in which the outflows regulating the escape of Ly{\\alpha} photons are s...

  1. Non-perturbative over-production of axion-like-particles (ALPs) via derivative interaction

    E-Print Network [OSTI]

    Anupam Mazumdar; Saleh Qutub

    2015-08-17

    Axion like particles (ALPs) are quite generic in many scenarios for physics beyond the Standard Model, they are pseudoscalar Nambu-Goldstone bosons, and appear once any global $U(1)$ symmetry is broken spontaneously. The ALPs can gain mass from various non-perturbative quantum effects, such as anomalies or instantons. ALPs can couple to the matter sector incluidng a scalar condensate such as inflaton or moduli field via derivative interactions, which are suppressed by the axion {\\it decay constant}, $f_\\chi$ . Although weakly interacting, the ALPs can be produced abundantly from the coherent oscillations of a homogeneous condensate. In this paper we will study such a scenario where the ALPs can be produced abundantly, and in some cases can even overclose the Universe via odd and even dimensional operators, as long as $f_\\chi/\\Phi_{\\rm I} \\ll 1$, where $\\Phi_{\\rm I}$ denotes the initial amplitude of the coherent oscillations of the scalar condensate, $\\phi$. We will briefly mention how such dangerous overproduction would affect dark matter and dark radiation abundances in the Universe.

  2. Spinning like a blue straggler: the population of fast rotating blue straggler stars in ? Centauri

    SciTech Connect (OSTI)

    Mucciarelli, A.; Lovisi, L.; Ferraro, F. R.; Dalessandro, E.; Lanzoni, B.

    2014-12-10

    By using high-resolution spectra acquired with FLAMES-GIRAFFE at the ESO/VLT, we measured the radial and rotational velocities for 110 blue straggler stars (BSSs) in ? Centauri, the globular cluster-like stellar system harboring the largest known BSS population. According to their radial velocities, 109 BSSs are members of the system. The rotational velocity distribution is very broad, with the bulk of BSSs spinning at less than ?40 km s{sup –1} (in agreement with the majority of such stars observed in other globular clusters) and a long tail reaching ?200 km s{sup –1}. About 40% of the sample has v{sub e} sin i > 40 km s{sup –1} and about 20% has v{sub e} sin i > 70 km s{sup –1}. Such a large fraction is very similar to the percentage of fast rotating BSSs observed in M4. Thus, ? Centauri is the second stellar cluster, beyond M4, with a surprisingly high population of fast spinning BSSs. We found a hint of radial behavior for a fraction of fast rotating BSSs, with a mild peak within one core radius, and a possible rise in the external regions (beyond four core radii). This may suggest that recent formation episodes of mass transfer BSSs occurred preferentially in the outskirts of ? Centauri, or that braking mechanisms able to slow down these stars are least efficient in the lowest density environments.

  3. Peptide affinity labels for thrombin and other trypsin-like proteases

    DOE Patents [OSTI]

    Shaw, E.N.; Kettner, C.A.

    1982-03-09

    A peptide affinity label is disclosed of the formula (I): as given in the patent wherein X is a radical capable of acting as a leaving group in a nucleophilic substitution reaction; A is an aromatic amino acid residue; B is H, or a C[sub 1]--C[sub 4] alkyl group, or aryl; Y is selected from the group consisting of hydrogen, aroyl, C[sub 1]--C[sub 6] acyl, and Q--(A)--[sub n], wherein Q = hydrogen, aroyl, or C[sub 1]--C[sub 6] acyl, n = 1--10, A is an amino acid residue selected from the aliphatic, hydroxy-containing, carboxylic acid group, and amide-thereofcontaining, aromatic, sulfur-containing and imino-containing amino acids; and wherein J is selected from the group consisting of --CH[sub 2]--, --CH[sub 2]--CH[sub 2]--, --CH[sub 2]--CH[sub 2]--CH[sub 2]--, --CH[double bond]CH-- and --CH(OH)--CH[sub 2]. The affinity label is useful for irreversibly inactivating thrombin and trypsin-like enzymes and may be used as a potential anticlotting agent. 2 figs.

  4. The influence of an ITER-like wall on disruptions at JET

    SciTech Connect (OSTI)

    Vries, P. C. de Hogeweij, G. M. D.; Baruzzo, M.; Murari, A.; Jachmich, S.; Lomas, P. J.; Matthews, G. F.; Pütterich, T.; Vega, J.; Collaboration: JET-EFDA Contributors

    2014-05-15

    In order to preserve the integrity of large tokamaks such as ITER, the number of disruptions has to be limited. JET has operated previously with a low frequency of disruptions (i.e., disruption rate) of 3.4% [P. C. de Vries et al., Nucl. Fusion 51, 053018 (2011)]. The start of operations with the new full-metal ITER-like wall at JET showed a marked rise in the disruption rate to 10%. A full survey was carried out to identify the root causes, the chain-of-events and classifying each disruption, similar to a previous analysis for carbon-wall operations. It showed the improvements made to avoid various disruption classes, but also indicated those disruption types responsible for the enhanced disruption rate. The latter can be mainly attributed to disruptions due to too high core radiation but also due to density control issues and error field locked modes. Detailed technical and physics understanding of disruption causes is essential for devising optimized strategies to avoid or mitigate these events.

  5. One-loop energy-momentum tensor in QED with electric-like background

    E-Print Network [OSTI]

    Gavrilov, S P

    2007-01-01

    We have obtained nonperturbative one-loop expressions for the mean energy-momentum tensor and current density of Dirac's field on a constant electric-like background. One of the goals of this calculation is to give a consistent description of back-reaction in such a theory. Two cases of initial states are considered: the vacuum state and the thermal equilibrium state. First, we perform calculations for the vacuum initial state. In the obtained expressions, we separate the contributions due to particle creation and vacuum polarization. The latter contributions are related to the Heisenberg-Euler Lagrangian. Then, we study the case of the thermal initial state. Here, we separate the contributions due to particle creation, vacuum polarization, and the contributions due to the work of the external field on the particles at the initial state. All these contributions are studied in detail, in different regimes of weak and strong fields and low and high temperatures. The obtained results allow us to establish restri...

  6. One-loop energy-momentum tensor in QED with electric-like background

    E-Print Network [OSTI]

    S. P. Gavrilov; D. M. Gitman

    2012-06-30

    We have obtained nonperturbative one-loop expressions for the mean energy-momentum tensor and current density of Dirac's field on a constant electric-like background. One of the goals of this calculation is to give a consistent description of back-reaction in such a theory. Two cases of initial states are considered: the vacuum state and the thermal equilibrium state. First, we perform calculations for the vacuum initial state. In the obtained expressions, we separate the contributions due to particle creation and vacuum polarization. The latter contributions are related to the Heisenberg-Euler Lagrangian. Then, we study the case of the thermal initial state. Here, we separate the contributions due to particle creation, vacuum polarization, and the contributions due to the work of the external field on the particles at the initial state. All these contributions are studied in detail, in different regimes of weak and strong fields and low and high temperatures. The obtained results allow us to establish restrictions on the electric field and its duration under which QED with a strong constant electric field is consistent. Under such restrictions, one can neglect the back-reaction of particles created by the electric field. Some of the obtained results generalize the calculations of Heisenberg-Euler for energy density to the case of arbitrary strong electric fields.

  7. On the Response of an OST to a Point-like Heat Source

    E-Print Network [OSTI]

    Quadt, A; Uhrmacher, M; Weingarten, J; Willenberg, B; Vennekate, H

    2011-01-01

    A new technique of superconducting cavity diagnostics has been introduced by D. Hartrill at Cornell University, Ithaca, USA. Oscillating Superleak Transducers (OST) detect the heat transferred from a cavity's quench point via "Second Sound" through the superfluid He bath, needed to cool the superconducting cavity. The observed response of an OST is a complex, but reproducible pattern of oscillations. A small helium evaporation cryostat was built which allows the investigation of the response of an OST in greater detail. The distance between a point-like electrical heater and the OST can be varied. The OST can be mounted either parallel or perpendicular to the plate, housing the heat source. If the artificial quench-point releases an amount of energy compatible to a real quench spot on a cavity's surface, the OST signal starts with a negative pulse, which is usually strong enough to allow automatic detection. Furthermore, the reflection of the Second Sound on the wall is observed. A reflection coefficient R = ...

  8. Method for loading lipid like vesicles with drugs of other chemicals

    DOE Patents [OSTI]

    Mehlhorn, R.J.

    1998-06-09

    A method for accumulating drugs or other chemicals within synthetic, lipid-like vesicles by means of a pH gradient imposed on the vesicles just prior to use is described. The method is suited for accumulating molecules with basic or acid moieties which are permeable to the vesicles membranes in their uncharged form and for molecules that contain charge moieties that are hydrophobic ions and can therefore cross the vesicle membranes in their charged form. The method is advantageous over prior art methods for encapsulating biologically active materials within vesicles in that is achieves very high degrees of loading with simple procedures that are economical and require little technical expertise, furthermore kits which can be stored for prolonged periods prior to use without impairment of the capacity to achieve drug accumulation are described. A related application of the method consists of using this technology to detoxify animals that have been exposed to poisons with basic, weak acid or hydrophobic charge groups within their molecular structures. 2 figs.

  9. Constraining interactions mediated by axion-like particles with ultracold neutrons

    E-Print Network [OSTI]

    S. Afach; G. Ban; G. Bison; K. Bodek; M. Burghoff; M. Daum; M. Fertl; B. Franke; Z. D. Gruji?; V. Hélaine; M. Kasprzak; Y. Kermaïdic; K. Kirch; P. Knowles; H. -C. Koch; S. Komposch; A. Kozela; J. Krempel; B. Lauss; T. Lefort; Y. Lemière; A. Mtchedlishvili; O. Naviliat-Cuncic; F. M. Piegsa; G. Pignol; P. N. Prashanth; G. Quéméner; D. Rebreyend; D. Ries; S. Roccia; P. Schmidt-Wellenburg; A. Schnabel; N. Severijns; J. Voigt; A. Weis; G. Wyszynski J. Zejma; J. Zenner; G. Zsigmond

    2014-12-11

    We report a new limit on a possible short range spin-dependent interaction from the precise measurement of the ratio of Larmor precession frequencies of stored ultracold neutrons and $^{199}$Hg atoms confined in the same volume. The measurement was performed in a $\\sim$1$\\mu$ T vertical magnetic holding field with the apparatus searching for a permanent electric dipole moment of the neutron at the Paul Scherrer Institute. A possible coupling between freely precessing polarized neutron spins and unpolarized nucleons of the wall material can be investigated by searching for a tiny change of the precession frequencies of neutron and mercury spins. Such a frequency change can be interpreted as a consequence of a short range spin-dependent interaction that could possibly be mediated by axions or axion-like particles. The interaction strength is proportional to the CP violating product of scalar and pseudoscalar coupling constants $g_Sg_P$. Our result confirms limits from complementary experiments with spin-polarized nuclei in a model-independent way. Limits from other neutron experiments are improved by up to two orders of magnitude in the interaction range of $10^{-6}<\\lambda<10^{-4}$ m.

  10. WHERE DOES FLUID-LIKE TURBULENCE BREAK DOWN IN THE SOLAR WIND?

    SciTech Connect (OSTI)

    Perri, S.; Carbone, V.; Veltri, P.

    2010-12-10

    Power spectra of the magnetic field in solar wind display a Kolmogorov law f {sup -5/3} at intermediate range of frequencies f, say within the inertial range. Two spectral breaks are also observed: one separating the inertial range from an f {sup -1} spectrum at lower frequencies, and another one between the inertial range and an f {sup -7/3} spectrum at higher frequencies. The breaking of fluid-like turbulence at high frequencies has been attributed to either the occurrence of kinetic Alfven wave fluctuations above the ion-cyclotron frequency or to whistler turbulence above the frequency corresponding to the proton gyroradius. Using solar wind data, we show that the observed high-frequency spectral break seems to be independent of the distance from the Sun, and then of both the ion-cyclotron frequency and the proton gyroradius. We suppose that the observed high-frequency break could be either caused by a combination of different physical processes or associated with a remnant signature of coronal turbulence.

  11. Hawking-like radiation from evolving black holes and compact horizonless objects

    E-Print Network [OSTI]

    Barcelo, Carlos; Sonego, Sebastiano; Visser, Matt

    2010-01-01

    Usually, Hawking radiation is derived assuming (i) that a future eternal event horizon forms, and (ii) that the subsequent exterior geometry is static. However, one may be interested in either considering quasi-black holes (objects in an ever-lasting state of approach to horizon formation, but never quite forming one), where (i) fails, or, following the evolution of a black hole during evaporation, where (ii) fails. We shall verify that as long as one has an approximately exponential relation between the affine parameters on the null generators of past and future null infinity, then subject to a suitable adiabatic condition being satisfied, a Planck-distributed flux of Hawking-like radiation will occur. This happens both for the case of an evaporating black hole, as well as for the more dramatic case of a collapsing object for which no horizon has yet formed (or even will ever form). In this article we shall cast the previous statement in a more precise and quantitative form, and subsequently provide several ...

  12. Characterizing the propagation of gravity waves in 3D nonlinear simulations of solar-like stars

    E-Print Network [OSTI]

    Alvan, L; Brun, A S; Mathis, S; Garcia, R A

    2015-01-01

    The revolution of helio- and asteroseismology provides access to the detailed properties of stellar interiors by studying the star's oscillation modes. Among them, gravity (g) modes are formed by constructive interferences between progressive internal gravity waves (IGWs), propagating in stellar radiative zones. Our new 3D nonlinear simulations of the interior of a solar-like star allows us to study the excitation, propagation, and dissipation of these waves. The aim of this article is to clarify our understanding of the behavior of IGWs in a 3D radiative zone and to provide a clear overview of their properties. We use a method of frequency filtering that reveals the path of {individual} gravity waves of different frequencies in the radiative zone. We are able to identify the region of propagation of different waves in 2D and 3D, to compare them to the linear raytracing theory and to distinguish between propagative and standing waves (g modes). We also show that the energy carried by waves is distributed in d...

  13. Preparations and characterizations of novel graphite-like materials and some high oxidation state fluorine chemistry

    SciTech Connect (OSTI)

    Shen, Ciping

    1992-11-01

    Novel graphite-like materials, BC{sub x} (6>x{ge}3), have been prepared using BCl{sub 3} and C{sub 6}H{sub 6} at 800--1000C, and C{sub x}N (14>x{ge}5) have been synthesized using C{sub 5}H{sub 5}N and Cl{sub 2} at 680C--986C. Bulk and thin film characterization were used to study the structure and bonding in these solids. C{sub 8}K(NH{sub 3}){sub 1.1} was prepared by reacting C{sub 8}K with gaseous NH{sub 3}. The carbon sub-lattice is hexagonal: a = 2.47 {Angstrom}, c = 6.47 {Angstrom}. The smaller a parameter and lower conductivity are attributed to smaller electron transfer from K to the conduction band solvation of K by NH{sub 3}. A simplified liquid phase method for synthesizing Li-graphite intercalation compounds has been developed; synthesis of a lamellar mixed conductor, C{sub x}{sup +}Li{sub 2}N{sup {minus}}, has been attempted. Stability and conductivity of (BN){sub 3}SO{sub 3}F have been studied; it was shown to be metallic with a specific conductivity of 1.5 S{center_dot}cm{sup {minus}1}. Its low conductivity is attributed to the low mobility of holes in BN sheets.

  14. Efficient weakly-radiative wireless energy transfer: An EIT-like approach

    SciTech Connect (OSTI)

    Hamam, Rafif E. [Center for Materials Science and Engineering and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)], E-mail: rafif@mit.edu; Karalis, Aristeidis; Joannopoulos, J.D.; Soljacic, Marin [Center for Materials Science and Engineering and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)

    2009-08-15

    Inspired by a quantum interference phenomenon known in the atomic physics community as electromagnetically induced transparency (EIT), we propose an efficient weakly radiative wireless energy transfer scheme between two identical classical resonant objects, strongly coupled to an intermediate classical resonant object of substantially different properties, but with the same resonance frequency. The transfer mechanism essentially makes use of the adiabatic evolution of an instantaneous (so called 'dark') eigenstate of the coupled 3-object system. Our analysis is based on temporal coupled mode theory (CMT), and is general enough to be valid for various possible sorts of coupling, including the resonant inductive coupling on which witricity-type wireless energy transfer is based. We show that in certain parameter regimes of interest, this scheme can be more efficient, and/or less radiative than other, more conventional approaches. A concrete example of wireless energy transfer between capacitively-loaded metallic loops is illustrated at the beginning, as a motivation for the more general case. We also explore the performance of the currently proposed EIT-like scheme, in terms of improving efficiency and reducing radiation, as the relevant parameters of the system are varied.

  15. The Effect of Lunar-like Satellites on the Orbital Infrared Light Curves of Earth-analog Planets

    E-Print Network [OSTI]

    Nicholas A. Moskovitz; Eric Gaidos; Darren Williams

    2008-10-17

    We investigate the influence of lunar-like satellites on the infrared orbital light curves of Earth-analog extra-solar planets. Such light curves will be obtained by NASA's Terrestrial Planet Finder (TPF) and ESA's Darwin missions as a consequence of repeat observations to confirm the companion status of a putative planet. We use an energy balance model to calculate disk-averaged infrared (bolometric) fluxes from planet-satellite systems over a full orbital period (one year). The satellites are assumed to lack an atmosphere, have a low thermal inertia like that of the Moon and span a range of plausible radii. The planets are assumed to have thermal and orbital properties that mimic those of the Earth while their obliquities and orbital longitudes of inferior conjunction remain free parameters. Even if the gross thermal properties of the planet can be independently constrained (e.g. via spectroscopy or visible-wavelength detection of specular glint from a surface ocean) only the largest (approximately Mars-size) lunar-like satellites can be detected by light curve data from a TPF-like instrument (i.e. one that achieves a photometric signal-to-noise of 10-20 at infrared wavelengths). Non-detection of a lunar-like satellite can obfuscate the interpretation of a given system's infrared light curve so that it may resemble a single planet with high obliquity, different orbital longitude of vernal equinox relative to inferior conjunction and in some cases drastically different thermal characteristics. If the thermal properties of the planet are not independently established then the presence of a lunar-like satellite cannot be inferred from infrared data, thus demonstrating that photometric light curves alone can only be used for preliminary study of extra-solar Earth-like planets.

  16. Cellular response to low dose radiation: Role of phosphatidylinositol-3 kinase like kinases

    SciTech Connect (OSTI)

    Balajee, A.S.; Meador, J.A.; Su, Y.

    2011-03-24

    It is increasingly realized that human exposure either to an acute low dose or multiple chronic low doses of low LET radiation has the potential to cause different types of cancer. Therefore, the central theme of research for DOE and NASA is focused on understanding the molecular mechanisms and pathways responsible for the cellular response to low dose radiation which would not only improve the accuracy of estimating health risks but also help in the development of predictive assays for low dose radiation risks associated with tissue degeneration and cancer. The working hypothesis for this proposal is that the cellular mechanisms in terms of DNA damage signaling, repair and cell cycle checkpoint regulation are different for low and high doses of low LET radiation and that the mode of action of phosphatidylinositol-3 kinase like kinases (PIKK: ATM, ATR and DNA-PK) determines the dose dependent cellular responses. The hypothesis will be tested at two levels: (I) Evaluation of the role of ATM, ATR and DNA-PK in cellular response to low and high doses of low LET radiation in simple in vitro human cell systems and (II) Determination of radiation responses in complex cell microenvironments such as human EpiDerm tissue constructs. Cellular responses to low and high doses of low LET radiation will be assessed from the view points of DNA damage signaling, DNA double strand break repair and cell cycle checkpoint regulation by analyzing the activities (i.e. post-translational modifications and kinetics of protein-protein interactions) of the key target proteins for PI-3 kinase like kinases both at the intra-cellular and molecular levels. The proteins chosen for this proposal are placed under three categories: (I) sensors/initiators include ATM ser1981, ATR, 53BP1, gamma-H2AX, MDC1, MRE11, Rad50 and Nbs1; (II) signal transducers include Chk1, Chk2, FANCD2 and SMC1; and (III) effectors include p53, CDC25A and CDC25C. The primary goal of this proposal is to elucidate the differences in cellular defense mechanisms between low and high doses of low LET radiation and to define the radiation doses where the cellular DNA damage signaling and repair mechanisms tend to shift. This information is critically important to address and advance some of the low dose research program objectives of DOE. The results of this proposed study will lead to a better understanding of the mechanisms for the cellular responses to low and high doses of low LET radiation. Further, systematic analysis of the role of PIKK signaling pathways as a function of radiation dose in tissue microenvironment will provide useful mechanistic information for improving the accuracy of radiation risk assessment for low doses. Knowledge of radiation responses in tissue microenvironment is important for the accurate prediction of ionizing radiation risks associated with cancer and tissue degeneration in humans.

  17. The effects of refraction on transit transmission spectroscopy: application to Earth-like exoplanets

    SciTech Connect (OSTI)

    Misra, Amit; Meadows, Victoria; Crisp, Dave

    2014-09-01

    We quantify the effects of refraction in transit transmission spectroscopy on spectral absorption features and on temporal variations that could be used to obtain altitude-dependent spectra for planets orbiting stars of different stellar types. We validate our model against altitude-dependent transmission spectra of the Earth from ATMOS and against lunar eclipse spectra from Pallé et al. We perform detectability studies to show the potential effects of refraction on hypothetical observations of Earth analogs with the James Webb Space Telescope NIRSPEC. Due to refraction, there will be a maximum tangent pressure level that can be probed during transit for each given planet-star system. We show that because of refraction, for an Earth-analog planet orbiting in the habitable zone of a Sun-like star only the top 0.3 bars of the atmosphere can be probed, leading to a decrease in the signal-to-noise ratio (S/N) of absorption features by 60%, while for an Earth-analog planet orbiting in the habitable zone of an M5V star it is possible to probe almost the entire atmosphere with minimal decreases in S/N. We also show that refraction can result in temporal variations in the transit transmission spectrum which may provide a way to obtain altitude-dependent spectra of exoplanet atmospheres. Additionally, the variations prior to ingress and subsequent to egress provide a way to probe pressures greater than the maximum tangent pressure that can be probed during transit. Therefore, probing the maximum range of atmospheric altitudes, and in particular the near-surface environment of an Earth-analog exoplanet, will require looking at out-of-transit refracted light in addition to the in-transit spectrum.

  18. ICRF heating in JET during initial operations with the ITER-like wall

    SciTech Connect (OSTI)

    Jacquet, P.; Brix, M.; Graham, M.; Mayoral, M.-L.; Meigs, A.; Monakhov, I.; Sirinelli, A. [Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Bobkov, V.; Drewelow, P.; Pütterich, T. [Max-Planck-Institut für Plasmaphysik, EURATOM-Assoziation, Garching (Germany); Brezinsek, S. [IEK-4, Forschungszentrum Jülich, Association EURATOM-FZJ (Germany); Campergue, A-L. [Ecole Nationale des Ponts et Chaussées, F77455 Marne-la-Vallée (France); Colas, L. [CEA, IRFM, F-13108 Saint-Paul-Lez-Durance (France); Czarnecka, A. [Association Euratom-IPPLM, Hery 23, 01-497 Warsaw (Poland); Klepper, C. C. [Oak Ridge National Laboratory, Oak Ridge, TN 37831-6169 (United States); Lerche, E.; Van-Eester, D. [Association EURATOM-Belgian State, ERM-KMS, Brussels (Belgium); Milanesio, D. [Politecnico di Torino, Department of Electronics, Torino (Italy); Mlynar, J. [Association EURATOM-IPP.CR, Za Slovankou 3, 182 21 Praha 8 (Czech Republic); Collaboration: JET-EFDA Contributors

    2014-02-12

    In 2011/12, JET started operation with its new ITER-Like Wall (ILW) made of a tungsten (W) divertor and a beryllium (Be) main chamber wall. The impact of the new wall material on the JET Ion Cyclotron Resonance Frequency (ICRF) operation was assessed and also the properties of JET plasmas heated with ICRF were studied. No substantial change of the antenna coupling resistance was observed with the ILW as compared with the carbon wall. Heat-fluxes on the protecting limiters close the antennas quantified using Infra-Red (IR) thermography (maximum 4.5 MW/m{sup 2} in current drive phasing) are within the wall power load handling capabilities. A simple RF sheath rectification model using the antenna near-fields calculated with the TOPICA code can well reproduce the heat-flux pattern around the antennas. ICRF heating results in larger tungsten and nickel (Ni) contents in the plasma and in a larger core radiation when compared to Neutral Beam Injection (NBI) heating. Some experimental facts indicate that main-chamber W components could be an important impurity source: the divertor W influx deduced from spectroscopy is comparable when using RF or NBI at same power and comparable divertor conditions; the W content is also increased in ICRF-heated limiter plasmas; and Be evaporation in the main chamber results in a strong and long lasting reduction of the impurity level. The ICRF specific high-Z impurity content decreased when operating at higher plasma density and when increasing the hydrogen concentration from 5% to 20%. Despite the higher plasma bulk radiation, ICRF exhibited overall good plasma heating efficiency; The ICRF power can be deposited at plasma centre and the radiation is mainly from the outer part of the plasma. Application of ICRF heating in H-mode plasmas started, and the beneficial effect of ICRF central electron heating to prevent W accumulation in the plasma core could be observed.

  19. Spectroscopic investigation of heavy impurity behaviour during ICRH with the JET ITER-like wall

    SciTech Connect (OSTI)

    Czarnecka, A. [Institute of Plasma Physics and Laser Microfusion, Association EURATOM-IPPLM, Hery 23 Str., 01-497 Warsaw (Poland); Bobkov, V.; Maggi, C.; Pütterich, T. [Max-Planck-Institut für Plasmaphysik, EURATOM-Association, D-85748 Garching (Germany); Coffey, I. H. [Department of Physics, Queen's University, Belfast, BT7 1NN, Northern Ireland (United Kingdom); Colas, L. [CEA, IRFM, F-13108 Saint-Paul-Lez-Durance (France); Jacquet, P.; Lawson, K. D. [Euratom/CCFE Association, Culham Science Centre, Abingdon, OX14 3DB (United Kingdom); Lerche, E.; Van Eester, D. [Association EURATOM - Belgian State, ERM-KMS, TEC Partner (Belgium); Mayoral, M.-L. [Euratom/CCFE Association, Culham Science Centre, Abingdon, OX14 3DB, UK and EFDA Close Support Unit, Garching (Germany); Collaboration: JET-EFDA Contributors

    2014-02-12

    Magnetically confined plasmas, such as those produced in the tokamak JET, contain measurable amounts of impurity ions produced during plasma-wall interactions (PWI) from the plasma-facing components and recessed wall areas. The impurities, including high- and mid-Z elements such as tungsten (W) from first wall tiles and nickel (Ni) from Inconel structure material, need to be controlled within tolerable limits, to ensure they do not significantly affect the performance of the plasma. This contribution focuses on documenting W and Ni impurity behavior during Ion Cyclotron Resonance Heating (ICRH) operation with the new ITER-Like Wall (ILW). Ni- and W-concentration were derived from VUV spectroscopy and the impact of applied power level, relative phasing of the antenna straps, plasma separatrix - antenna strap distance, IC resonance position, edge density and different plasma configuration, on the impurity release during ICRH are presented. For the same ICRH power the Ni and W concentration was lower with dipole phasing than in the case of ??/2 phasing. The Ni concentration was found to increase with ICRH power and for the same NBI power level, ICRH-heated plasmas were characterized by two times higher Ni impurity content. Both W and Ni concentrations increased strongly with decreasing edge density which is equivalent to higher edge electron temperatures and more energetic ions responsible for the sputtering. In either case higher levels were found in ICRH than in NBI heated discharges. When the central plasma temperature was similar, ICRH on-axis heating resulted in higher core Ni impurity concentration in comparison to off-axis ICRH in L-mode. It was also found that the main core radiation during ICRH came from W.

  20. Radiatively Induced Type II seesaw and Vector-like 5/3 Charge Quarks

    E-Print Network [OSTI]

    R. Franceschini; R. N. Mohapatra

    2013-06-26

    Understanding small neutrino masses in type II seesaw models with TeV scale SM triplet Higgs bosons requires that its coupling with the standard model Higgs doublet H be dialed down to be order eV to KeV, which is a fine-tuning by a factor of $10^{-11}-10^{-8}$ with respect to the weak scale. We present a SUSY extension of the type II seesaw model where this dimensionful small coupling is radiatively induced, thus making its smallness natural. This model has an exotic vector-like quark doublet which contains a quark X with electric charge 5/3 and a top partner t'. We discuss in details the phenomenology of the model paying special attention to the consequences of the interactions of the the exotic heavy quarks and the scalars of the model. Implications for neutrinoless double beta decay and for the LHC experiments are discussed in detail. Remarkably, in this model both the seesaw triplet and the heavy quarks can manifest at colliders in a host of different signatures, including some that significantly differ from those of the minimal models. Depending on the choice of the hierarchy of couplings, the decay of the heavy quarks and of the seesaw triplet may be subject to bounds that can be tighter or looser than the bounds from standard LHC searches. Furthermore we point out a new short-distance contribution to neutrinoless double beta decay mediated by the simultaneous propagation of the type II triplet and exotic fermions. Remarkably this contribution to the neutrinoless double beta decay is parametrically quite independent from the scale of the generated neutrino mass.

  1. Formation of Earth-like Planets During and After Giant Planet Migration

    E-Print Network [OSTI]

    Avi M. Mandell; Sean N. Raymond; Steinn Sigurdsson

    2007-01-02

    Close-in giant planets are thought to have formed in the cold outer regions of planetary systems and migrated inward, passing through the orbital parameter space occupied by the terrestrial planets in our own Solar System. We present dynamical simulations of the effects of a migrating giant planet on a disk of protoplanetary material and the subsequent evolution of the planetary system. We numerically investigate the dynamics of post-migration planetary systems over 200 million years using models with a single migrating giant planet, one migrating and one non-migrating giant planet, and excluding the effects of a gas disk. Material that is shepherded in front of the migrating giant planet by moving mean motion resonances accretes into "hot Earths", but survival of these bodies is strongly dependent on dynamical damping. Furthermore, a significant amount of material scattered outward by the giant planet survives in highly excited orbits; the orbits of these scattered bodies are then damped by gas drag and dynamical friction over the remaining accretion time. In all simulations Earth-mass planets accrete on approximately 100 Myr timescales, often with orbits in the Habitable Zone. These planets range in mass and water content, with both quantities increasing with the presence of a gas disk and decreasing with the presence of an outer giant planet. We use scaling arguments and previous results to derive a simple recipe that constrains which giant planet systems are able to form and harbor Earth-like planets in the Habitable Zone, demonstrating that roughly one third of the known planetary systems are potentially habitable.

  2. Advantages of axion-like particles for the description of very-high-energy blazar spectra

    E-Print Network [OSTI]

    Giorgio Galanti; Marco Roncadelli; Alessandro De Angelis; Giovanni F. Bignami

    2015-09-16

    In the last few years, the Imaging Atmospheric Cherenkov Telescopes have detected more than 40 blazars in the very-high-energy range (VHE, 100 GeV - 100 TeV). During their trip to us, the VHE photons undergo an energy-dependent absorption by scattering off the infrared/optical/ultraviolet photons of the EBL, which is produced by galaxies during the whole cosmic evolution. Actually, both the observed spectra and the emitted ones predicted by conventional VHE photon emission models have a simple power-law behavior to a good approximation. Surprisingly, the emitted slope distribution {{\\Gamma}em (z)} distribution exhibits a correlation with z, since the associated best-fit regression line is a decreasing function of z, leading blazars with harder spectra to be found only at larger redshift. It is very difficult to imagine an intrinsic mechanism which could lead to this spectral variation within conventional physics, given the fact that neither cosmological evolutionary effects nor observational selection effects can explain it. Things are quite different in the presence of axion-like particles (ALPs). We show that photon-ALP oscillations occurring in extragalactic magnetic fields yield, for a realistic choice of the parameters, a {{\\Gamma}em (z)} distribution whose best-fit regression line becomes amazingly redshift-independent -- indeed in agreement with the physical intuition -- and so the above problems disappear. This is evidently a highly nontrivial fact, which therefore provides preliminary evidence for the existence of ALPs. Moreover, a new scenario for VHE blazars emerges, wherein all values of {{\\Gamma}em (z)} fall within a small strip about the horizontal best-fit regression line in the {\\Gamma}em - z plane, and the large scatter of the observed values of the slope arises from the large spread of the blazar redshifts.

  3. Relationship between the structure and electrical characteristics of diamond-like carbon films

    SciTech Connect (OSTI)

    Takabayashi, Susumu Otsuji, Taiichi; Yang, Meng; Ogawa, Shuichi; Hayashi, Hiroyuki; Ješko, Radek; Takakuwa, Yuji

    2014-09-07

    To elucidate the relationship between the structure and the electrical characteristics of diamond-like carbon (DLC) films, DLC films were synthesized in a well-controlled glow discharge with the aid of photoelectrons in an argon/methane atmosphere. The dielectric constant and breakdown strength of the films exhibited opposite behaviors, depending on the total pressure during the synthesis. The product of these two values decreased monotonically as the pressure increased. The Raman spectra were analyzed with a Voigt-type formula. Based on the results, the authors propose the “sp{sup 2} cluster model” for the DLC structure. This model consists of conductive clusters of sp{sup 2} carbons surrounded by a dielectric matrix sea of sp{sup 2} carbon, sp{sup 3} carbon, and hydrogen, and indicates that the dielectric constant of the whole DLC film is determined by the balance between the dielectric constant of the matrix and the total size of the clusters, while the breakdown strength is determined by the reciprocal of the cluster size. The model suggests that a high-? DLC film can be synthesized at a middle pressure and consists of well-grown sp{sup 2} clusters and a dense matrix. A low-? DLC film can be synthesized both at low and high pressures. The sp{sup 2} cluster model explains that a low-? DLC film synthesized at low pressure consists of a dense matrix and a low density of sp{sup 2} clusters, and exhibits a high breakdown strength. On the other hand, a low-? film synthesized at high pressure consists of a coarse matrix and a high density of clusters and exhibits a low breakdown strength.

  4. Pancreatic stellate cells enhance stem cell-like phenotypes in pancreatic cancer cells

    SciTech Connect (OSTI)

    Hamada, Shin [Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai (Japan)] [Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai (Japan); Masamune, Atsushi, E-mail: amasamune@med.tohoku.ac.jp [Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai (Japan)] [Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai (Japan); Takikawa, Tetsuya; Suzuki, Noriaki; Kikuta, Kazuhiro; Hirota, Morihisa [Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai (Japan)] [Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai (Japan); Hamada, Hirofumi [Laboratory of Oncology, Department of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji (Japan)] [Laboratory of Oncology, Department of Life Sciences, Tokyo University of Pharmacy and Life Sciences, Hachioji (Japan); Kobune, Masayoshi [Fourth Department of Internal Medicine, Sapporo Medical University School of Medicine, Sapporo (Japan)] [Fourth Department of Internal Medicine, Sapporo Medical University School of Medicine, Sapporo (Japan); Satoh, Kennichi [Division of Cancer Stem Cell, Miyagi Cancer Center Research Institute, Natori (Japan)] [Division of Cancer Stem Cell, Miyagi Cancer Center Research Institute, Natori (Japan); Shimosegawa, Tooru [Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai (Japan)] [Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai (Japan)

    2012-05-04

    Highlights: Black-Right-Pointing-Pointer Pancreatic stellate cells (PSCs) promote the progression of pancreatic cancer. Black-Right-Pointing-Pointer Pancreatic cancer cells co-cultured with PSCs showed enhanced spheroid formation. Black-Right-Pointing-Pointer Expression of stem cell-related genes ABCG2, Nestin and LIN28 was increased. Black-Right-Pointing-Pointer Co-injection of PSCs enhanced tumorigenicity of pancreatic cancer cells in vivo. Black-Right-Pointing-Pointer This study suggested a novel role of PSCs as a part of the cancer stem cell niche. -- Abstract: The interaction between pancreatic cancer cells and pancreatic stellate cells (PSCs), a major profibrogenic cell type in the pancreas, is receiving increasing attention. There is accumulating evidence that PSCs promote the progression of pancreatic cancer by increasing cancer cell proliferation and invasion as well as by protecting them from radiation- and gemcitabine-induced apoptosis. Recent studies have identified that a portion of cancer cells, called 'cancer stem cells', within the entire cancer tissue harbor highly tumorigenic and chemo-resistant phenotypes, which lead to the recurrence after surgery or re-growth of the tumor. The mechanisms that maintain the 'stemness' of these cells remain largely unknown. We hypothesized that PSCs might enhance the cancer stem cell-like phenotypes in pancreatic cancer cells. Indirect co-culture of pancreatic cancer cells with PSCs enhanced the spheroid-forming ability of cancer cells and induced the expression of cancer stem cell-related genes ABCG2, Nestin and LIN28. In addition, co-injection of PSCs enhanced tumorigenicity of pancreatic cancer cells in vivo. These results suggested a novel role of PSCs as a part of the cancer stem cell niche.

  5. HESS J1616-508: likely powered by PSR J1617-5055

    E-Print Network [OSTI]

    R. Landi; A. De Rosa; A. J. Dean; L. Bassani; P. Ubertini; A. J. Bird

    2007-07-05

    HESS J1616-508 is one of the brightest emitters in the TeV sky. Recent observations with the IBIS/ISGRI telescope on board the INTEGRAL spacecraft have revealed that a young, nearby and energetic pulsar, PSR J1617-5055, is a powerful emitter of soft gamma-rays in the 20-100 keV domain. In this paper we present an analysis of all available data from the INTEGRAL, Swift, BeppoSAX and XMM-Newton telescopes with a view to assessing the most likely counterpart to the HESS source. We find that the energy source that fuels the X/gamma-ray emissions is derived from the pulsar, both on the basis of the positional morphology, the timing evidence and the energetics of the system. Likewise, the 1.2% of the pulsar's spin down energy loss needed to power the 0.1-10 TeV emission is also fully consistent with other HESS sources known to be associated with pulsars. The relative sizes of the X/gamma-ray and VHE sources are consistent with the expected lifetimes against synchrotron and Compton losses for a single source of parent electrons emitted from the pulsar. We find that no other known object in the vicinity could be reasonably considered as a plausible counterpart to the HESS source. We conclude that there is good evidence to assume that the HESS J1616-508 source is driven by PSR J1617-5055 in which a combination of synchrotron and inverse Compton processes combine to create the observed morphology of a broad-band emitter from keV to TeV energies.

  6. When and how does a prominence-like jet gain kinetic energy?

    SciTech Connect (OSTI)

    Liu, Jiajia; Liu, Rui; Zhang, Quanhao; Liu, Kai; Shen, Chenglong; Wang, S.; Wang, Yuming

    2014-02-20

    A jet is a considerable amount of plasma being ejected from the chromosphere or lower corona into the higher corona and is a common phenomenon. Usually, a jet is triggered by a brightening or a flare, which provides the first driving force to push plasma upward. In this process, magnetic reconnection is thought to be the mechanism to convert magnetic energy into thermal, nonthermal, and kinetic energies. However, most jets could reach an unusual high altitude and end much later than the end of its associated flare. This fact implies that there is another way to continuously transfer magnetic energy into kinetic energy even after the reconnection. The picture described above is well known in the community, but how and how much magnetic energy is released through a way other than reconnection is still unclear. By studying a prominence-like jet observed by SDO/AIA and STEREO-A/EUVI, we find that the continuous relaxation of the post-reconnection magnetic field structure is an important process for a jet to climb up higher than it could through only reconnection. The kinetic energy of the jet gained through the relaxation is 1.6 times that gained from the reconnection. The resultant energy flux is hundreds of times larger than the flux required for the local coronal heating, suggesting that such jets are a possible source to keep the corona hot. Furthermore, rotational motions appear all the time during the jet. Our analysis suggests that torsional Alfvén waves induced during reconnection could not be the only mechanism to release magnetic energy and drive jets.

  7. Insulin like growth factor 2 regulation of aryl hydrocarbon receptor in MCF-7 breast cancer cells

    SciTech Connect (OSTI)

    Tomblin, Justin K.; Salisbury, Travis B.

    2014-01-17

    Highlights: •IGF-2 stimulates concurrent increases in AHR and CCND1 expression. •IGF-2 promotes the binding of AHR to the endogenous cyclin D1 promoter. •AHR knockdown inhibits IGF-2 stimulated increases in CCND1 mRNA and protein. •AHR knockdown inhibits IGF-2 stimulated increases in MCF-7 proliferation. -- Abstract: Insulin like growth factor (IGF)-1 and IGF-2 stimulate normal growth, development and breast cancer cell proliferation. Cyclin D1 (CCND1) promotes cell cycle by inhibiting retinoblastoma protein (RB1). The aryl hydrocarbon receptor (AHR) is a major xenobiotic receptor that also regulates cell cycle. The purpose of this study was to investigate whether IGF-2 promotes MCF-7 breast cancer proliferation by inducing AHR. Western blot and quantitative real time PCR (Q-PCR) analysis revealed that IGF-2 induced an approximately 2-fold increase (P < .001) in the expression of AHR and CCND1. Chromatin immunoprecipitation (ChIP), followed by Q-PCR indicated that IGF-2 promoted (P < .001) a 7-fold increase in AHR binding on the CCND1 promoter. AHR knockdown significantly (P < .001) inhibited IGF-2 stimulated increases in CCND1 mRNA and protein. AHR knockdown cells were less (P < .001) responsive to the proliferative effects of IGF-2 than control cells. Collectively, our findings have revealed a new regulatory mechanism by which IGF-2 induction of AHR promotes the expression of CCND1 and the proliferation of MCF-7 cells. This previously uncharacterized pathway could be important for the proliferation of IGF responsive cancer cells that also express AHR.

  8. Nuclear recoil corrections to the $2p_\\frac{3}{2}$ state energy of hydrogen-like and high $Z$ lithium like atoms in all orders in $?Z$

    E-Print Network [OSTI]

    A. N. Artemyev; V. M. Shabaev; V. A. Yerokhin

    1995-10-16

    The relativistic nuclear recoil corrections to the energy of the $2p_{\\frac{3}{2}}$ state of hydrogen-like and the $(1s)^{2}2p_{\\frac{3}{2}}$ state of high $Z$ lithium-like atoms in all orders in $\\alpha Z$ are calculated. The calculations are carried out using the B-spline method for the Dirac equation. For low $Z$ the results of the calculation are in good agreement with the $\\alpha Z$ -expansion results. It is found that the total nuclear recoil contribution to the energy of the $(1s)^{2}2p_{\\frac{3}{2}}- (1s)^{2}2s$ transition in lithium-like uranium constitutes $-0.09\\,eV$.

  9. We haven't discovered any aliens yet so we don't know if they exist. But, many scientists think it is likely we

    E-Print Network [OSTI]

    Lawrence, Rick L.

    it is likely we will someday discover aliens and that they won't look like the little green men in cartoons (especially sourdough), yogurt, cheese, pickles, chocolate, tea, root beer, and olives. Do some research

  10. Efforts towards the synthesis of fully N-differentiated heparin-like glycosaminoglycans; and, Investigations into the mechanism of inactivation of RTPR by gemcitabine triphosphate

    E-Print Network [OSTI]

    Lohman, Gregory J. S

    2007-01-01

    Efforts towards the Synthesis of Fully N-Differentiated Heparin-like Glycosaminoglycans. Heparin-like glycosaminoglycans (HLGAGs) are complex information-carrying biopolymers and are an important component of the coagulation ...

  11. Influence of Lithophysal Geometry on the Uniaxial Compression of Tuff-Like Rock

    SciTech Connect (OSTI)

    Rigby, Douglas B.

    2007-06-13

    A large portion of the rock of the high-level nuclear waste repository at Yucca Mountain contains lithophysae or voids. These voids have a significant detrimental effect on the engineering properties of the rock mass and its performance. The lithophysae were formed at the time of volcanic deposition by pockets of gas trapped within the compressing and cooling pyroclastic flow material. Lithophysae vary by size, shape, and spatial frequency of occurrence. Due to the difficulties of testing actual lithophysal rock, the current mechanical property data set is limited and the numerical models of lithophysal rock are not well validated. The purpose of this task was to experimentally quantify the effect of void geometry in the mechanical compression of cubes of analog lithophysal-like rock. In this research the mechanical properties of the analog rock were systematically studied by examining various patterns of voids based on variables consisting of hole shape, size, and geometrical distribution. Each specified hole pattern was cast into 6 by 6 by 6-in. Hydro-StoneTB® specimens (produced in triplicate) and then tested under uniaxial compression. Solid Hydro-StoneTB® specimens exhibited similar mechanical properties to those estimated for rock mass solid specimens of Topopah Spring tuff. The results indicated that the compressive strength and Young’s Modulus values decrease with increasing specimen void porosity. The modulus and strength with void porosity relationships are essentially linear over the 5 to 20 percent void porosity range. When zero void porosity (solid specimen) results are added, exponential functions do not provide a good fit to the data due to a significant sensitivity of strength and modulus to the presence of macro-sized voids. From solid specimens there is roughly a 60 percent drop in strength with about 7 percent void porosity, increasing to an 80 percent drop at about 20 percent void porosity. The percent change in modulus from the solid specimen value is roughly 30 and 45 percent at 7 and 19 percent void porosity, respectively. A bilinear model gives a much better fit to the observed experimental data. Shape of hole appears to be significant for strength, but not for Young’s Modulus. Size of hole (at similar values of porosity) does not effect modulus values, but there may be a correlation with strength (smaller hole specimens are slightly stronger). Overall, the results help to validate the Yucca Mountain numerical model of lithophysal rock, but there are also some differences that should be looked into and explained. Hydro-Stone TB® specimens give mechanical strength results that are about one rock mass category lower than is expected based on their lithophysal porosity.

  12. The effect of different eLISA-like configurations on massive black hole parameter estimation

    E-Print Network [OSTI]

    Edward K. Porter

    2015-05-29

    As the theme for the future L3 Cosmic Vision mission, ESA has recently chosen the `Gravitational Wave Universe'. Within this call, a mission concept called eLISA has been proposed. This observatory has a current initial configuration consisting of 4 laser links between the three satellites, which are separated by a distance of one million kilometers, constructing a single channel Michelson interferometer. However, the final configuration for the observatory will not be fixed until the end of this decade. With this in mind, we investigate the effect of different eLISA-like configurations on massive black hole detections. This work compares the results of a Bayesian inference study of 120 massive black hole binaries out to a redshift of $z\\sim13$ for a $10^6$m arm-length eLISA with four and six links, as well as a $2\\times10^6$m arm-length observatory with four links. We demonstrate that the original eLISA configuration should allow us to recover the luminosity distance of the source with an error of less than 10% out to a redshift of $z\\sim4$, and a sky error box of $\\leq10^2\\,deg^2$ out to $z\\sim0.1$. In contrast, both alternative configurations suggest that we should be able to conduct the same parameter recovery with errors of less than 10% in luminosity distance out to $z\\sim12$ and $\\leq10^2\\,deg^2$ out to $z\\sim0.4$. Using the information from these studies, we also infer that if we were able to construct a 2Gm, 6-link detector, the above values would shift to $z\\sim20$ for luminosity distance and $z\\sim0.9$ for sky error. While the final configuration will also be dependent on both technological and financial considerations, our study suggests that increasing the size of a two arm detector is a viable alternative to the inclusion of a third arm in a smaller detector. More importantly, this work further suggests no clear scientific loss between either choice.

  13. Manning free counterions fraction for a rod-like polyion - short DNA fragments in very low salt

    E-Print Network [OSTI]

    Tomislav Vuletic; Sanja Dolanski Babic; Danijel Grgicin; Damir Aumiler; Joachim Raedler; Francoise Livolant; Silvia Tomic

    2011-01-05

    We quantified the Manning free (uncondensed) counterions fraction $\\theta$ for dilute solutions of rod-like polyions - 150bp DNA fragments, in very low salt $salt environment, with the decrease in DNA concentration itself. The extremes of the experimental $\\theta(c)$ range occur towards the highest, above 1 mM and the lowest, below 0.05 mM, DNA concentrations, and correspond to the theoretical $\\theta$ values for dsDNA and ssDNA, respectively. Therefore, we confirmed Manning condensation and conductivity models to be valuable in description of dilute solutions of rod-like polyions.

  14. Diamond/diamond-like thin film growth in a butane plasma on unetched, unheated, N-type Si(100) substrates

    SciTech Connect (OSTI)

    Williams, E.S.; Richardson, J.S. Jr.; Anderson, D.; Starkey, K.

    1995-06-01

    Deposition of diamond/diamond-like thin films on unetched, unheated, n-type Si(100) substrates in a butane plasma is reported. An interconnection between values of index of refraction, hydrogen flow rate, butane flow rate and Rf power was determined. The H{sub 2} and C{sub 4}H{sub 10} molecules are disassociated by Rf energy to create a plasma. Carbon from the butane forms a thin diamond/diamond-like film on a suitable substrate, which in the current investigation, is n-type Si(100).

  15. Raman-scattering-assistant broadband noise-like pulse generation in all-normal-dispersion fiber lasers

    E-Print Network [OSTI]

    Li, Daojing; Li, Lei; Chen, Hao; Tang, Dingyuan; Zhao, Luming

    2015-01-01

    We report on the observation of both stable dissipative solitons and noise-like pulses with the presence of strong Raman scattering in a relatively short all-normal-dispersion Yb-doped fiber laser. We show that Raman scattering can be filtered out by intracavity filter. Furthermore, by appropriate intracavity polarization control, the Raman effect can be utilized to generate broadband noise-like pulses (NLPs) with bandwidth up to 61.4 nm. To the best of our knowledge, this is the broadest NLP achieved in all-normal-dispersion fiber lasers

  16. Transmission and Goos-Hänchen like Shifts through a Graphene Double Barrier in an Inhomogeneous Magnetic Field

    E-Print Network [OSTI]

    Miloud Mekkaoui; Ahmed Jellal; Hocine Bahlouli

    2015-07-14

    We studied the transport properties of electrons in graphene as they are scattered by a double barrier potential in the presence of an inhomogeneous magnetic field. We computed the transmission coefficient and Goos-H\\"anchen like shifts for our system and noticed that transmission is not allowed for certain range of energies. In particular, we found that, in contrast to the electrostatic barriers, the magnetic barriers are able to confine Dirac fermions. We also established some correlation between the electronic transmission properties of Dirac fermions with the Goos-H\\"anchen like shifts, as reflected in the numerical data.

  17. Overviewof Programs & Services In my mind, I am very brave. I can do anything. I fly like the wind. I am

    E-Print Network [OSTI]

    Pevsner, Jonathan

    Overviewof Programs & Services In my mind, I am very brave. I can do anything. I fly like the wind. I am never alone. my mind, I am full of dreams. In my mind, I am very brave. I fly like the wind. I, I am full of dreams. I am amazing. I fly like the wind. In my mind, I can do anything. I fly like

  18. A Case where a Paradox Like Braess's Occurs in the Nash Equilibrium but Does Not Occur in the Wardrop Equilibrium

    E-Print Network [OSTI]

    A Case where a Paradox Like Braess's Occurs in the Nash Equilibrium but Does Not Occur of the other individuals. Another framework in which such a paradox may occur is that of the Nash equilibrium­ negligible eoeect on the other players. It is natural to expect the same type of paradox in the Nash equilib

  19. Design of a new reactor-like high temperature near ambient pressure scanning tunneling microscope for catalysis studies

    E-Print Network [OSTI]

    Tao, Franklin Feng; Nguyen, Luan; Zhang, Shiran

    2013-01-01

    Here, we present the design of a new reactor-like high-temperature near ambient pressure scanning tunneling microscope (HT-NAP-STM) for catalysis studies. This HT-NAP-STM was designed for exploration of structures of catalyst surfaces at atomic...

  20. Impact of body condition on plasma leptin and insulin-like growth factor-I concentrations in stallions and geldings 

    E-Print Network [OSTI]

    Chancellor, Tommy Neal

    2009-05-15

    The objective of this study was to more clearly define the relationship between body condition, plasma leptin and insulin-like growth factor-I (IGF-I) in stallions and geldings in moderate (5.0-5.5) versus fleshy (7.0-7.5) ...

  1. Wax Inhibition by Comb-like Polymers: Support of the Incorporation-Perturbation Mechanism from Molecular Dynamics Simulations

    E-Print Network [OSTI]

    Goddard III, William A.

    Wax Inhibition by Comb-like Polymers: Support of the Incorporation-Perturbation Mechanism from ReceiVed: April 10, 2007; In Final Form: July 26, 2007 Deposition of wax on a cold surface is a serious problem in oil production. Progress in developing more effective wax inhibitors has been impeded

  2. Bow-wave-like hydraulic jump and horseshoe vortex around an obstacle in a supercritical open channel flow

    E-Print Network [OSTI]

    Boyer, Edmond

    Bow-wave-like hydraulic jump and horseshoe vortex around an obstacle in a supercritical open the obstacle, two main flow structures are observed: i a hydraulic jump in the near-surface region and ii turbulent regime , the detachment length of the hydraulic jump exceeds the one of the horseshoe vortex

  3. rhodopsin-like photopigment in adult eyes preserved by rapid freezing suggests that the rhabdoms of B. thermydron beyond the

    E-Print Network [OSTI]

    Quirk, Gregory J.

    rhodopsin-like photopigment in adult eyes preserved by rapid freezing suggests that the rhabdoms for anatomical analysis. Rapid freezing of crabs collected remotely under low light conditions at infrequently being used. Adult eyes were dissected out, quick-frozen using cryogenic spray, and sectioned at 14 mm

  4. On the Trade-off between Energy and Multicast Efficiency in 802.16e-like Mobile Networks

    E-Print Network [OSTI]

    Cohen, Reuven

    On the Trade-off between Energy and Multicast Efficiency in 802.16e-like Mobile Networks Reuven addressed in the past: the trade-off between energy efficiency and throughput for multicast services in 802 applications the trade-off between delay and energy efficiency has been extensively researched. However

  5. Like this post? Subscribe to our RSS feed and stay up to date. Navy Develops Battery that Runs on Mud

    E-Print Network [OSTI]

    Lovley, Derek

    Planetsave Like this post? Subscribe to our RSS feed and stay up to date. Navy Develops Battery that Runs on Mud (http://planetsave.com/blog/2010/04/20/navy-develops-battery-that-runs-on- mud/) (http by Joshua S Hill Published on April 20th, 2010 in Energy & Fuel 1 Comment 5/4/2010 Navy Develops Battery

  6. Mutations in the Fourth EGF-like Domain Affect Thrombomodulin-Induced Changes in the Active Site of Thrombin

    E-Print Network [OSTI]

    Komives, Elizabeth A.

    Mutations in the Fourth EGF-like Domain Affect Thrombomodulin-Induced Changes in the Active Site conservative mutants of residues in the fourth domain of thrombomodulin (TM) were prepared and assayed of the conservative mutants bound more weakly to thrombin despite the fact that the fourth domain does not directly

  7. Abstract--A fish-like propulsion system seems to be an interesting and efficient alternative to propellers in small

    E-Print Network [OSTI]

    Papadopoulos, Evangelos

    1 Abstract--A fish-like propulsion system seems to be an interesting and efficient alternative. Finally there is a description of the control system implementation for the tail's motion. Index terms--Fish propulsion, underwater robot, fish design. I. INTRODUCTION LTHOUGH almost all marine vehicles use propellers

  8. Timed Nuclear Import of a Transcription Factor During Erythropoiesis Erythroid Krppel-like factor (EKLF) is an erythroid transcription factor

    E-Print Network [OSTI]

    Chen, Sheng-Wei

    Timed Nuclear Import of a Transcription Factor During Erythropoiesis Erythroid Krüppel-like factor. The regulatory mechanisms of the nuclear transport of EKLF during erythroid differentiation have remained unclear provided essential new insights into this process. They show that nuclear import of EKLF in erythroid cells

  9. Boys are like Girls: Insights in the Gender Digital Divide in Higher Education in Switzerland and Europe

    E-Print Network [OSTI]

    Boys are like Girls: Insights in the Gender Digital Divide in Higher Education in Switzerland Switzerland, Locarno, Switzerland luca.botturi@supsi.ch) Chiara Bramani (New Media in Education Laboratory, University of Lugano, Switzerland chiara.bramani@usi.ch) Sean McCusker (School of Education, Durham

  10. Music Combined with Business If you'd like to combine your study of music with courses in business,

    E-Print Network [OSTI]

    Miles, Will

    Music Combined with Business If you'd like to combine your study of music with courses in business, consider working toward the Stetson B.M.O.F. degree, the bachelor of music with elective study in outside is primarily in music, but who also have a strong desire to pursue a business-related area of study as well

  11. Music with an Outside Field If you'd like to combine your study of music with courses in another

    E-Print Network [OSTI]

    Miles, Will

    usic Music with an Outside Field If you'd like to combine your study of music with courses in another field of interest, consider working toward the music with an outside field degree, the bachelor of music with elective study in an outside field. This diverse and competitive degree program will enable

  12. Music Performance Piano/Organ If you would like to prepare for a professional career or graduate

    E-Print Network [OSTI]

    Miles, Will

    Music Performance ­ Piano/Organ If you would like to prepare for a professional career or graduate offers solid foundations in keyboard technique, music and performance. A Distinctive Program The School of Music has 65 pianos available to students and faculty, including a Steinway Concert Grand (a gift from

  13. Shells of crabs like these may be the key to prolonging the life of microbial fuel cells that

    E-Print Network [OSTI]

    sensors beneath the sea, according to a team of Penn State researchers. To produce energy, microbial fuelShells of crabs like these may be the key to prolonging the life of microbial fuel cells that power/06/ 070604123858.htm Marine Sediment Microbial Fuel Cells Get A Nutritional Boost ScienceDaily (June 11, 2007

  14. Improving youth football in Scotland `I would like to have control over my life and do what I

    E-Print Network [OSTI]

    Millar, Andrew J.

    Improving youth football in Scotland `I would like to have control over my life and do what I want and informed picture of participation in youth football in Scotland. Thanks also to community sport and football clubs who assisted, and to the variety of people who willingly shared their experiences

  15. Anglers who have been offshore fishing have most likely seen the bulging eyes, protruding stomach and distended

    E-Print Network [OSTI]

    Watson, Craig A.

    Anglers who have been offshore fishing have most likely seen the bulging eyes, protruding stomach and distended intestines of a fish brought up from deep water on hook and line. You might wonder if there is hope for such fish. As with human divers, fish that experience rapid pressure change can suffer a host

  16. Laser-like instabilities in quantum nano-electromechanical systems S. D. Bennett and A. A. Clerk

    E-Print Network [OSTI]

    Bennett, Steven D.

    Laser-like instabilities in quantum nano-electromechanical systems S. D. Bennett and A. A. Clerk; published 9 November 2006 We discuss negative damping regimes in quantum nano-electromechanical systemsRevB.74.201301 PACS number s : 73.23.Hk, 85.85. j, 72.70. m At their heart, quantum nano-electromechanical

  17. PUBLISHED ONLINE: 22 JUNE 2015 | DOI: 10.1038/NPHYS3368 Linear magnetoresistance in mosaic-like

    E-Print Network [OSTI]

    Loss, Daniel

    -dimensional (3D) silver chalcogenides, semiconductors, topological insulators, and 2D multilayer graphenes2 advantageous to treat a 2D system. Not only is magnetotransport an essentially 2D phenomenon, but also-like bilayer graphene Ferdinand Kisslinger1 , Christian Ott1 , Christian Heide1 , Erik Kampert2 , Benjamin Butz

  18. The use of snakes as symbols has been popular throughout the ages. Egyptian Pharaohs wore the likeness of a poisonous

    E-Print Network [OSTI]

    the likeness of a poisonous asp on their headdresses in the belief that this protected them from harm and gave and squeezes, causing death by suffocation. Poisonous snakes have the most specialized method of killing their prey. These snakes strike an animal and inject poison through long hollow teeth or fangs. After killing

  19. Extended cusp-like regions and their dependence on the Polar orbit, seasonal variations, and interplanetary conditions

    E-Print Network [OSTI]

    Lockwood, Mike

    in understanding the transfer of mass, energy, and momen- tum from the solar wind to the magnetosphere Sensor (MICS) of the Charge and Mass Magnetospheric Ion Composition Experiment (CAMMICE) instrument of magnetosheath-like ions in the energy-per-charge range of $1 to 10 keV eÀ1 . We investigate the concurrence

  20. Developing an OSGi-like Service Platform for .NET Clment Escoffier, Didier Donsez, and Richard S. Hall

    E-Print Network [OSTI]

    Donsez, Didier

    service deployment life cycle and its amenability to remote management. Microsoft's .NET platform, in some extensible systems like those made possi- ble by the OSGi framework for Java. This paper pre- sents industries and to Java development in general. The main abilities contributing to its use in these new areas

  1. Folding Protein-Like Structures with Open Gemma B. Danks, Susan Stepney, and Leo S. D. Caves

    E-Print Network [OSTI]

    Stepney, Susan

    Folding Protein-Like Structures with Open L-systems Gemma B. Danks, Susan Stepney, and Leo S. D501@york.ac.uk Abstract. Proteins, under native conditions, fold to specific 3D struc- tures according protein is a strong indicator of its function in the cell. The mechanisms involved in protein folding

  2. Reasoning about Equilibria in Game-Like Concurrent Systems Julian Gutierrez and Paul Harrenstein and Michael Wooldridge

    E-Print Network [OSTI]

    Woolridge, Mike

    Reasoning about Equilibria in Game-Like Concurrent Systems Julian Gutierrez and Paul Harrenstein, histories, ...) will be generated in equi- librium? In (Gutierrez, Harrenstein, and Wooldridge 2013 can be identified as being the result of Nash equilib- rium strategies, and (Gutierrez, Harrenstein

  3. Improved Lithium Ion Behavior Properties of TiO2@Graphitic-like Carbon Core@Shell Nanostructure

    E-Print Network [OSTI]

    Cao, Guozhong

    Improved Lithium Ion Behavior Properties of TiO2@Graphitic-like Carbon Core@Shell Nanostructure Min Intercalation Electrochemistry Capacitance Lithium Ion batteries A B S T R A C T We demonstrate TiO2@graphitic on the electrode surface and enhanced lithium ion intercalation, leading to lower charge transfer resistance

  4. Degrees of Orality in Speech-like Corpora: Comparative Annotation of Chat and E-mail Corpora

    E-Print Network [OSTI]

    Eckhard Bick Institute of Language and Communication, University of Southern Denmark Campusvej 55, DK 5230 in a speech-like fashion, without the constraints of ordinary written production, thus in fact providing://www.cs.cmu.edu/~enron/). The data was originally made public, and posted to the web, by the (US) Federal Energy Regulatory

  5. Extraterrestrial Ice. "Now he could see, glistening like silver bubbles in the earthlight, a group of pressure

    E-Print Network [OSTI]

    Moore, John

    to simulating conditions expected on a long space exploration trip, to Mars for example. Temperatures in central. It is likely that the first destinations of man in the long term exploration and colonization of the solar system will be the polar regions of first the Moon and then Mars. This is for the simple reason that only

  6. 1 Bar Charts Bar charts, like pie charts, are a visual way to organize data. One immediate

    E-Print Network [OSTI]

    DeMaio, Joe

    1 Bar Charts Bar charts, like pie charts, are a visual way to organize data. One immediate advantage that bar charts have over pie charts is the ability to represent negative quantities. Example 1 and receiving stats for the game appear below. We could not represent this data with a pie chart due to Matt

  7. Does the Use of Diamond-Like Carbon Coating and Organophosphate Lubricant Additive Together Cause Excessive Tribochemical Material Removal?

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

    Zhou, Yan; Leonard, Donovan N.; Meyer, Harry M.; Luo, Huimin; Qu, Jun

    2015-08-22

    We observe unexpected wear increase on a steel surface that rubbed against diamond-like carbon (DLC) coatings only when lubricated by phosphate-based antiwear additives. Contrary to the literature hypothesis of a competition between zinc dialkyldithiophosphate produced tribofilms and DLC-induced carbon transfer, here a new wear mechanism based on carbon-catalyzed tribochemical interactions supported by surface characterization is proposed

  8. Mach-like Angular Correlations Arise Only From the Head Zone of AdS/CFT String Jets

    E-Print Network [OSTI]

    Jorge Noronha; Miklos Gyulassy

    2008-06-26

    We show that Mach-like azimuthal correlations of associated hadrons in the wake of heavy quark jets modeled in the AdS/CFT string drag picture originate only from the near-quark ``Head'' region. The contributions from the far zones lead only to a yield peaked in the opposite direction with respect to the trigger jet.

  9. Could a 1755-Like Tsunami Reach the French Atlantic Coastline? Constraints from Twentieth Century Observations and Numerical Modeling

    E-Print Network [OSTI]

    Madariaga, Raúl

    Could a 1755-Like Tsunami Reach the French Atlantic Coastline? Constraints from Twentieth Century and R. MADARIAGA 3 Abstract--The tsunami generated by the 1 November, 1755 earthquake off the coast the French coastline, we conducted a study to search for signs of the tsunami in historical records from all

  10. Blue supergiant model for ultra-long gamma-ray burst with superluminous-supernova-like bump

    SciTech Connect (OSTI)

    Nakauchi, Daisuke; Nakamura, Takashi [Department of Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502 (Japan); Kashiyama, Kazumi [Department of Astronomy and Astrophysics, Department of Physics, Center for Particle and Gravitational Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States); Suwa, Yudai [Yukawa Institute for Theoretical Physics, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo-ku, Kyoto 606-8502 (Japan)

    2013-11-20

    Long gamma-ray bursts (LGRBs) have a typical duration of ?30 s, and some of them are associated with hypernovae, such as Type Ic SN 1998bw. Wolf-Rayet stars are the most plausible LGRB progenitors, since the free fall time of the envelope is consistent with the duration, and the natural outcome of the progenitor is a Type Ic SN. While a new population of ultra-long GRBs (ULGRBs), GRB 111209A, GRB 101225A, and GRB 121027A, has a duration of ?10{sup 4} s, two of them are accompanied by superluminous-supernova-like (SLSN-like) bumps, which are ? 10 times brighter than typical hypernovae. Wolf-Rayet progenitors cannot explain ULGRBs because of durations that are too long and SN-like bumps that are too bright. A blue supergiant (BSG) progenitor model, however, can explain the duration of ULGRBs. Moreover, SLSN-like bumps can be attributed to the so-called cocoon fireball photospheric emissions (CFPEs). Since a large cocoon is inevitably produced during the relativistic jet piercing though the BSG envelope, this component can be smoking gun evidence of the BSG model for ULGRBs. In this paper, we examine u-, g-, r-, i-, and J-band light curves of three ULGRBs and demonstrate that they can be fitted quite well by our BSG model with the appropriate choices of the jet opening angle and the number density of the ambient gas. In addition, we predict that for 121027A, SLSN-like bump could have been observed for ?20-80 days after the burst. We also propose that some SLSNe might be CFPEs of off-axis ULGRBs without visible prompt emissions.

  11. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    before the start of the day · Commits additional generators to meet spinning reserve and reliability (N-1Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia for the Electric Grid John D. Siirola Sandia National Laboratories Albuquerque, NM USA With special thanks to EWO

  12. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE

    E-Print Network [OSTI]

    Ray, Jaideep

    - model for jet-in-crossflow simulations S. Lefantzi, J. Ray, S. Arunajatesan and L. Dechant Contact for transonic jet-in- crossflow simula*ons § A strongly vor*cal flow, oAen with weak shocksT # $ % & ' ( xi ) * + , - .= k C1 f1Pk -C2 f2( )+ S µT = Cµ fµ k2 #12;Target problem - jet-in-crossflow

  13. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE

    E-Print Network [OSTI]

    Ray, Jaideep

    - model for jet-in-crossflow simulations J. Ray, S. Lefantzi,, S. Arunajatesan and L. Dechant Contact for transonic jet-in- crossflow simula*ons § A strongly vor*cal flow, oAen with weak shocksT # $ % & ' ( xi ) * + , - .= k C1 f1Pk -C2 f2( )+ S µT = Cµ fµ k2 #12;Target problem - jet-in-crossflow

  14. Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE

    E-Print Network [OSTI]

    's National Nuclear Security Administration under contract DE-AC04-94AL85000. SAND 2014-15322PE Impact of PV

  15. Rv2969c, essential for optimal growth in Mycobacterium tuberculosis, is a DsbA-like enzyme that interacts with VKOR-derived peptides and has atypical features of DsbA-like disulfide oxidases

    SciTech Connect (OSTI)

    Premkumar, Lakshmanane, E-mail: p.lakshmanane@imb.uq.edu.au; Heras, Begoña; Duprez, Wilko; Walden, Patricia; Halili, Maria; Kurth, Fabian; Fairlie, David P.; Martin, Jennifer L., E-mail: p.lakshmanane@imb.uq.edu.au [University of Queensland, St Lucia, QLD 4067 (Australia)

    2013-10-01

    The gene product of M. tuberculosis Rv2969c is shown to be a disulfide oxidase enzyme that has a canonical DsbA-like fold with novel structural and functional characteristics. The bacterial disulfide machinery is an attractive molecular target for developing new antibacterials because it is required for the production of multiple virulence factors. The archetypal disulfide oxidase proteins in Escherichia coli (Ec) are DsbA and DsbB, which together form a functional unit: DsbA introduces disulfides into folding proteins and DsbB reoxidizes DsbA to maintain it in the active form. In Mycobacterium tuberculosis (Mtb), no DsbB homologue is encoded but a functionally similar but structurally divergent protein, MtbVKOR, has been identified. Here, the Mtb protein Rv2969c is investigated and it is shown that it is the DsbA-like partner protein of MtbVKOR. It is found that it has the characteristic redox features of a DsbA-like protein: a highly acidic catalytic cysteine, a highly oxidizing potential and a destabilizing active-site disulfide bond. Rv2969c also has peptide-oxidizing activity and recognizes peptide segments derived from the periplasmic loops of MtbVKOR. Unlike the archetypal EcDsbA enzyme, Rv2969c has little or no activity in disulfide-reducing and disulfide-isomerase assays. The crystal structure of Rv2969c reveals a canonical DsbA fold comprising a thioredoxin domain with an embedded helical domain. However, Rv2969c diverges considerably from other DsbAs, including having an additional C-terminal helix (H8) that may restrain the mobility of the catalytic helix H1. The enzyme is also characterized by a very shallow hydrophobic binding surface and a negative electrostatic surface potential surrounding the catalytic cysteine. The structure of Rv2969c was also used to model the structure of a paralogous DsbA-like domain of the Ser/Thr protein kinase PknE. Together, these results show that Rv2969c is a DsbA-like protein with unique properties and a limited substrate-binding specificity.

  16. Modelling gamma-ray-axion-like particle oscillations in turbulent magnetic fields: relevance for observations with Cherenkov telescopes

    E-Print Network [OSTI]

    Manuel Meyer

    2014-12-08

    Axion-like particles (ALPs) are a common prediction of certain theories beyond the Standard Model and couple to photons in the presence of external magnetic fields. As a consequence, photon-ALP conversions could lead to an enhancement of the flux of extragalactic gamma-ray sources that is otherwise attenuated due to the interactions with background radiation fields. The magnetic fields traversed by the gamma rays are often turbulent and frequently modelled with a simple domain-like structure. Given a maximum mixing between photons and ALPs, we show that in such models realisations of the fields exist for which the photon-ALP oscillation probability vanishes. This behaviour does not occur in more sophisticated magnetic-field models.

  17. Predicting the amount of hydrogen stripped by the SN explosion for SN 2002cx-like SNe Ia

    SciTech Connect (OSTI)

    Liu, Zheng-Wei; Chen, X. F.; Wang, B.; Han, Z. W. [Yunnan Observatories, Chinese Academy of Sciences, Kunming 650011 (China); Kromer, M. [Max-Planck-Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85741 Garching (Germany); Fink, M.; Röpke, F. K. [Institut für Theoretische Physik und Astrophysik, Universität Würzburg, Am Hubland, D-97074 Würzburg (Germany); Pakmor, R., E-mail: zwliu@ynao.ac.cn [Heidelberger Institut für Theoretische Studien, Schloss-Wolfsbrunnenweg 35, D-69118 Heidelberg (Germany)

    2013-12-01

    The most favored progenitor scenarios for Type Ia supernovae (SNe Ia) involve the single-degenerate (SD) scenario and the double-degenerate scenario. The absence of stripped hydrogen (H) in the nebular spectra of SNe Ia challenges the SD progenitor models. Recently, it was shown that pure deflagration explosion models of Chandrasekhar-mass white dwarfs, ignited off-center, reproduce the characteristic observational features of 2002cx-like SNe Ia very well. In this work we predict, for the first time, the amount of stripped H for the off-center, pure deflagration explosions. We find that their low kinetic energies lead to inefficient H mass stripping (? 0.01 M {sub ?}), indicating that the stripped H may be hidden in (observed) late-time spectra of SN 2002cx-like SNe Ia.

  18. Binding-induced folding of prokaryotic ubiquitin-like protein on the mycobacterium proteasomal ATPase targets substrates for degradation

    SciTech Connect (OSTI)

    Wang, T.; Li, H.; Darwin, K. H.

    2010-11-01

    Mycobacterium tuberculosis uses a proteasome system that is analogous to the eukaryotic ubiquitin-proteasome pathway and is required for pathogenesis. However, the bacterial analog of ubiquitin, prokaryotic ubiquitin-like protein (Pup), is an intrinsically disordered protein that bears little sequence or structural resemblance to the highly structured ubiquitin. Thus, it was unknown how pupylated proteins were recruited to the proteasome. Here, we show that the Mycobacterium proteasomal ATPase (Mpa) has three pairs of tentacle-like coiled coils that recognize Pup. Mpa bound unstructured Pup through hydrophobic interactions and a network of hydrogen bonds, leading to the formation of an {alpha}-helix in Pup. Our work describes a binding-induced folding recognition mechanism in the Pup-proteasome system that differs mechanistically from substrate recognition in the ubiquitin-proteasome system. This key difference between the prokaryotic and eukaryotic systems could be exploited for the development of a small molecule-based treatment for tuberculosis.

  19. Binding-induced Folding of Prokaryotic Ubiquitin-like Protein on the Mycobacterium Proteasomal ATPase Targets Substrates for Degradation

    SciTech Connect (OSTI)

    T Wang; K Heran Darwin; H Li

    2011-12-31

    Mycobacterium tuberculosis uses a proteasome system that is analogous to the eukaryotic ubiquitin-proteasome pathway and is required for pathogenesis. However, the bacterial analog of ubiquitin, prokaryotic ubiquitin-like protein (Pup), is an intrinsically disordered protein that bears little sequence or structural resemblance to the highly structured ubiquitin. Thus, it was unknown how pupylated proteins were recruited to the proteasome. Here, we show that the Mycobacterium proteasomal ATPase (Mpa) has three pairs of tentacle-like coiled coils that recognize Pup. Mpa bound unstructured Pup through hydrophobic interactions and a network of hydrogen bonds, leading to the formation of an {alpha}-helix in Pup. Our work describes a binding-induced folding recognition mechanism in the Pup-proteasome system that differs mechanistically from substrate recognition in the ubiquitin-proteasome system. This key difference between the prokaryotic and eukaryotic systems could be exploited for the development of a small molecule-based treatment for tuberculosis.

  20. Noise in the wire: the real impact of wire resistance for the Johnson (-like) noise based secure communicator

    E-Print Network [OSTI]

    Laszlo B. Kish; Jacob Scheuer

    2010-03-16

    We re-evaluate the impact of wire resistance on the noise voltage and current in the Johnson-(like)-noise based secure communicator, correcting the result presented in [Physics Letters A 359 (2006) 737]. The analysis shown here is based on the fluctuation-dissipation and the linear response theorems. The results indicate that the impact of wire resistance in practical communicators is significantly lower than the previous estimation.

  1. Using the X-FEL to photo-pump X-ray laser transitions in He-like Ne

    SciTech Connect (OSTI)

    Nilsen, J; Rohringer, N

    2011-08-30

    Nearly four decades ago H-like and He-like resonantly photo-pumped laser schemes were proposed for producing X-ray lasers. However, demonstrating these schemes in the laboratory has proved to be elusive because of the difficulty of finding a strong resonant pump line. With the advent of the X-ray free electron laser (X-FEL) at the SLAC Linac Coherent Light Source (LCLS) we now have a tunable X-ray laser source that can be used to replace the pump line in previously proposed laser schemes and allow researchers to study the physics and feasibility of resonantly photo-pumped laser schemes. In this paper we use the X-FEL at 1174 eV to photo-pump the singly excited 1s2p state of He-like Ne to the doubly excited 2p3p state and model gain on the 2p3p-2p2s transition at 175 eV and the 2p3p-1s3p transition at 1017 eV. One motivation for studying this scheme is to explore possible quenching of the gain due to strong non-linear coupling effects from the intense X-FEL beam We compare this scheme with photo-pumping the He-like Ne ground state to the 1s3p singly excited state followed by lasing on the 3p-2s and 3d-2p transitions at 158 and 151 eV. Experiments are being planned at LCLS to study these laser processes and coherent quantum effects.

  2. Search for new physics in high pT like-sign dilepton events at CDF II

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

    Aaltonen, T.

    2011-10-25

    We present a search for new physics in events with two high pT leptons of the same electric charge, using data with an integrated luminosity of 6.1 fb-1. The observed data are consistent with standard model predictions. We set 95% C.L. lower limits on the mass of doubly-charged scalars decaying to like-sign dileptons, mH±± > 190 - 245 GeV/c2, depending on the decay mode and coupling.

  3. Involvement of a eukaryotic-like ubiquitin-related modifier in the proteasome pathway of the archaeon Sulfolobus acidocaldarius

    E-Print Network [OSTI]

    Anjum, Rana S.; Bray, Sian M.; Blackwood, John K.; Kilkenny, Mairi L.; Coelho, Matthew A.; Foster, Benjamin M.; Li, Shurong; Howard, Julie A.; Pellegrini, Luca; Albers, Sonja-Verena; Deery, Michael J.; Robinson, Nicholas P.

    2015-01-01

    1 Involvement of a eukaryotic-like ubiquitin-related modifier in the proteasome pathway of the archaeon Sulfolobus acidocaldarius. Rana S. Anjum 1*, Sian M. Bray 1*, John K. Blackwood 1, Mairi L. Kilkenny 1, Matthew A. Coelho... , UK. 2) Cambridge Centre for Proteomics, Department of Biochemistry and Cambridge Systems Biology Centre, University of Cambridge, Cambridge, UK. 3) Molecular Biology of Archaea, Max Planck Institute for Terrestrial Microbiology, 35043...

  4. Searches for Higgs boson like high mass resonances in the bosonic decay channels with ATLAS and CMS

    E-Print Network [OSTI]

    Lo Sterzo, Francesco; The ATLAS collaboration

    2015-01-01

    In this talk the searches of the ATLAS and CMS experiment for additional Higgs boson like resonances in the WW, ZZ and $\\gamma\\gamma$ final state, for high masses beyond 125 GeV are summarized. The searches are based on the full LHC run-1 dataset of each experiment. Upper limits are presented in the context of an electro-weak singlet extension of the standard model.

  5. The Analytical One-Loop Contributions to Higgs Boson Mass in the Supersymmetric Standard Model with Vector-like Particles

    E-Print Network [OSTI]

    Li, Tianjun; Wang, Xiao-Chuan; Xiong, Zhao-Hua

    2015-01-01

    In the Minimal Supersymmetric Standard Model (MSSM) with additional vector-like particles (VLPs), we for the first time derive the particle mass spectra and the Feynman rules, as well as analytically calculate the one-loop contributions to the Higgs boson mass from the fermions and sfermions. After discussing and numerically analysing a cases without bilinear terms and a case with a (partial) decoupling limit, we find: (i) The corrections depend on the mass splittings between quarks and squarks and between vector-like fermions and their sfermions; (ii) There exists the (partial) decoupling limit, where the VLPs decouple from the electrwoeak (EW) energy scale, even when one of the VLPs is light around the EW scale. The reason is that the contributions to Higgs mass can be suppressed by the (or partial) decoupling effects, which can make the EW phenomenology very different from the MSSM; (iii) The SM-like Higgs boson with mass around 125 GeV gives strong constraints on the VLPs if the top squarks are around 1~T...

  6. Helium-like triplet density diagnostics: Applications to CHANDRA--LETGS X-ray observations of Capella and Procyon

    E-Print Network [OSTI]

    J. U. Ness; R. Mewe; J. H. M. M. Schmitt; A. J. J. Raassen; D. Porquet; J. S. Kaastra; R. L. J. van der Meer; V. Burwitz; P. Predehl

    2000-12-11

    Electron density diagnostics based on the triplets of Helium-like CV, NVI, and OVII are applied to the X-ray spectra of Capella and Procyon measured with the Low Energy Transmission Grating Spectrometer (LETGS) on board the Chandra X-ray Observatory. New theoretical models for the calculation of the line ratios between the forbidden (f), intercombination (i), and the resonance (r) lines of the helium-like triplets are used. The derived densities are quite typical of densities found in the solar active regions, and also pressures and temperatures in Procyon's and Capella's corona at a level of T=10^6K are quite similar. We find no evidence for densities as high as measured in solar flares. Comparison of our Capella and Procyon measurements with the Sun shows little difference in the physical properties of the layers producing the CV, NVI, and OVII emission. Assuming the X-ray emitting plasma to be confined in magnetic loops, we obtain typical loop length scales of L_Capella > 8 L_Procyon from the loop scaling laws, implying that the magnetic structures in Procyon and Capella are quite different. The total mean surface fluxes emitted in the helium- and hydrogen-like ions are quite similar for Capella and Procyon, but exceed typical solar values by one order of magnitude. We thus conclude that Procyon's and Capella's coronal filling factors are larger than corresponding solar values.

  7. Colloidal Cutin-like Siderophoric Molecules Mobilize Plutonium from Contaminated Soils of the Rocky Flats Environmental Technology Site (RFETS), USA

    SciTech Connect (OSTI)

    Xu, C.; Santschi, P; Roberts, K; Zhong, J; Hatcher, P; Hung, C; Francis, A; Dodge, C; Honeyman, B

    2008-01-01

    Relatively recently, inorganic colloids have been invoked to reconcile the apparent contradictions between expectations based on classical dissolved-phase Pu transport and field observations of 'enhanced' Pu mobility (Kersting et al. Nature 1999, 397, 56-59). A new paradigm for Pu transport is mobilization and transport via biologically produced ligands. This study for the first time reports a new finding of Pu being transported, at sub-pM concentrations, by a cutin-like natural substance containing siderophore-like moieties and virtually all mobile Pu. Most likely, Pu is complexed by chelating groups derived from siderophores that are covalently bound to a backbone of cutin-derived soil degradation products, thus revealing the history of initial exposure to Pu. Features such as amphiphilicity and small size make this macromolecule an ideal collector for actinides and other metals and a vector for their dispersal. Cross-linking to the hydrophobic domains (e.g., by polysaccharides) gives this macromolecule high mobility and a means of enhancing Pu transport. This finding provides a new mechanism for Pu transport through environmental systems that would not have been predicted by Pu transport models.

  8. Stellar activity as noise in exoplanet detection I. Methods and application to solar-like stars and activity cycles

    E-Print Network [OSTI]

    Korhonen, H; Piskunov, N; Hackman, T; Juncher, D; Jarvinen, S P; Joergensen, U G

    2015-01-01

    The detection of exoplanets using any method is prone to confusion due to the intrinsic variability of the host star. We investigate the effect of cool starspots on the detectability of the exoplanets around solar-like stars using the radial velocity method. For investigating this activity-caused "jitter" we calculate synthetic spectra using radiative transfer, known stellar atomic and molecular lines, different surface spot configurations, and an added planetary signal. Here, the methods are described in detail, tested and compared to previously published studies. The methods are also applied to investigate the activity jitter in old and young solar-like stars, and over a solar-like activity cycles. We find that the mean full jitter amplitude obtained from the spot surfaces mimicking the solar activity varies during the cycle approximately between 1 m/s and 9 m/s. With a realistic observing frequency a Neptune mass planet on a one year orbit can be reliably recovered. On the other hand, the recovery of an Ea...

  9. Liquid Metal Flow Can Be One Clue to Explain the Frequently Observed Fluid-Like Matters on Mars

    E-Print Network [OSTI]

    Jing Liu; Yunxia Gao; Huangde Li

    2013-10-07

    The frequently discovered flooding structure on Mars and other planets has long been an intriguing mystery remained un-disclosed so far. Considering that on Earth, quite a few low melting point liquid metals or their alloy can be candidates of fluid like matters, we proposed here that there might also exists certain liquid metal instead of water or methane alone on Mars or the like planets. Compared with water, such liquid metal would be much easier to stay at the Mars surface because of its low melting point however extremely high evaporation point. Along this theoretical route, quite a few observations on the fluid like matters in former space explorations can be well interpreted. Such hypothesis for the existence of liquid metal on Mars surface does not mean refuting the possibility of water on Mars. This new point would be helpful for planning further exploration of Mars in a sense according to the characters of liquid metal. It at least identifies one more target fluid towards either finding or denying life at outer space. Whether the planet could harbor life in some form or it reaffirms Mars as an important future destination for human exploration still needs serious but not just enthusiasm explorations.

  10. A SUPER-EARTH-SIZED PLANET ORBITING IN OR NEAR THE HABITABLE ZONE AROUND A SUN-LIKE STAR

    SciTech Connect (OSTI)

    Barclay, Thomas; Burke, Christopher J.; Howell, Steve B.; Rowe, Jason F.; Huber, Daniel; Jenkins, Jon M.; Quintana, Elisa V.; Still, Martin; Twicken, Joseph D.; Bryson, Stephen T.; Borucki, William J.; Caldwell, Douglas A.; Clarke, Bruce D.; Christiansen, Jessie L; Coughlin, Jeffrey L.; Ciardi, David; Fischer, Debra A.; and others

    2013-05-10

    We present the discovery of a super-Earth-sized planet in or near the habitable zone of a Sun-like star. The host is Kepler-69, a 13.7 mag G4V-type star. We detect two periodic sets of transit signals in the 3-year flux time series of Kepler-69, obtained with the Kepler spacecraft. Using the very high precision Kepler photometry, and follow-up observations, our confidence that these signals represent planetary transits is >99.3%. The inner planet, Kepler-69b, has a radius of 2.24{sup +0.44}{sub -0.29} R{sub Circled-Plus} and orbits the host star every 13.7 days. The outer planet, Kepler-69c, is a super-Earth-sized object with a radius of 1.7{sup +0.34}{sub -0.23} R{sub Circled-Plus} and an orbital period of 242.5 days. Assuming an Earth-like Bond albedo, Kepler-69c has an equilibrium temperature of 299 {+-} 19 K, which places the planet close to the habitable zone around the host star. This is the smallest planet found by Kepler to be orbiting in or near the habitable zone of a Sun-like star and represents an important step on the path to finding the first true Earth analog.

  11. Space and time resolved spectroscopy of laser-produced plasmas: A study of density-sensitive x-ray transitions in helium-like and neon-like ions

    SciTech Connect (OSTI)

    Young, Bruce Kai Fong

    1988-09-01

    The determination of level populations and detailed population mechanisms in dense plasmas has become an increasingly important problem in atomic physics. In this work, the density variation of line intensities and level populations in aluminum K-shell and molybdenum and silver L-shell emission spectra have been measured from high-powered, laser-produced plasmas. For each case, the density dependence of the observed line emission is due to the effect of high frequency electron-ion collisions on metastable levels. The density dependent line intensities vary greatly in laser-produced plasmas and can be used to extract detailed information concerning the population kinetics and level populations of the ions. The laser-plasmas had to be fully characterized in order to clearly compare the observed density dependence with atomic theory predictions. This has been achieved through the combined use of new diagnostic instruments and microdot targets which provided simultaneously space, time, and spectrally resolved data. The plasma temperatures were determined from the slope of the hydrogen-like recombination continuum. The time resolved electron density profiles were measured using multiple frame holographic interferometry. Thus, the density dependence of K-shell spectral lines could be clearly examined, independent of assumptions concerning the dynamics of the plasma. In aluminum, the electron density dependence of various helium-like line intensity ratios were measured. Standard collisional radiative equilibrium models fail to account for the observed density dependence measured for the ''He/sub ..cap alpha..//IC'' ratio. Instead, a quasi-steady state atomic model based on a purely recombining plasma is shown to accurately predict the measured density dependence. This same recombining plasma calculation successfully models the density dependence of the high-n ''He/sub ..gamma..//He/sub ..beta../'' and ''He/sub delta//He/sub ..beta../'' helium-like resonance line intensity ratios.

  12. Empirical Evaluation of 3-Electron QED Effects FRCM Lithium Like Resonance Lines of Elements Z=22-42 in the TFTR and JET Tokamaks

    E-Print Network [OSTI]

    Empirical Evaluation of 3-Electron QED Effects FRCM Lithium Like Resonance Lines of Elements Z=22-42 in the TFTR and JET Tokamaks

  13. Upgrade of the Power Deposition and Thermal Models for the First Wall Protection of JET with an ITER-like Be Combination of Wall

    E-Print Network [OSTI]

    Upgrade of the Power Deposition and Thermal Models for the First Wall Protection of JET with an ITER-like Be Combination of Wall

  14. Towards Baseline Operation Integrating ITER-Relevant Core and Edge Plasma within the Constraint of the ITER-Like Wall at JET

    E-Print Network [OSTI]

    Towards Baseline Operation Integrating ITER-Relevant Core and Edge Plasma within the Constraint of the ITER-Like Wall at JET

  15. Steps in Validating Scrape-Off Layer Simulations of Attached and Detached Plasmas in the JET ITER-Like Wall Configuration

    E-Print Network [OSTI]

    Steps in Validating Scrape-Off Layer Simulations of Attached and Detached Plasmas in the JET ITER-Like Wall Configuration

  16. FAR-ULTRAVIOLET SPECTROSCOPY OF THE NOVA-LIKE VARIABLE KQ MONOCEROTIS: A NEW SW SEXTANTIS STAR?

    SciTech Connect (OSTI)

    Wolfe, Aaron; Sion, Edward M.; Bond, Howard E. E-mail: edward.sion@villanova.edu

    2013-06-01

    New optical spectra obtained with the SMARTS 1.5 m telescope and archival International Ultraviolet Explorer (IUE) far-ultraviolet (FUV) spectra of the nova-like variable KQ Mon are discussed. The optical spectra reveal Balmer lines in absorption as well as He I absorption superposed on a blue continuum. The 2011 optical spectrum is similar to the KPNO 2.1 m IIDS spectrum we obtained 33 years earlier except that the Balmer and He I absorption is stronger in 2011. Far-ultraviolet IUE spectra reveal deep absorption lines due to C II, Si III, Si IV, C IV, and He II, but no P Cygni profiles indicative of wind outflow. We present the results of the first synthetic spectral analysis of the IUE archival spectra of KQ Mon with realistic optically thick, steady-state, viscous accretion-disk models with vertical structure and high-gravity photosphere models. We find that the photosphere of the white dwarf (WD) contributes very little FUV flux to the spectrum and is overwhelmed by the accretion light of a steady disk. Disk models corresponding to a WD mass of {approx}0.6 M {sub Sun }, with an accretion rate of order 10{sup -9} M {sub Sun} yr{sup -1} and disk inclinations between 60 Degree-Sign and 75 Degree-Sign , yield distances from the normalization in the range of 144-165 pc. KQ Mon is discussed with respect to other nova-like variables. Its spectroscopic similarity to the FUV spectra of three definite SW Sex stars suggests that it is likely a member of the SW Sex class and lends support to the possibility that the WD is magnetic.

  17. On the Rôle of a Torsion-like Field in a Scenario for the Spin Hall Effect

    E-Print Network [OSTI]

    C. F. L. Godinho; J. A. Helayël Neto

    2014-12-13

    Starting from an action that describes a Dirac fermion, we propose and analyze a model based on a low-relativistic Pauli equation coupled to a torsion-like term to study Spin Hall Effect (SHE). We point out a very particular connection between the modified Pauli equation and the (SHE), where what we refer to torsion as field playing an important r\\^ole in the spin-orbit coupling process. In this scenario, we present a proposal of a spin-type current, considering the tiny contributions of torsion in connection with geometrical properties of the material.

  18. Trauma exposure, PTSD and psychotic-like symptoms in post-conflict Timor Leste: an epidemiological survey

    E-Print Network [OSTI]

    Soosay, Ian; Silove, Derrick; Bateman-Steel, Catherine; Steel, Zachary; Bebbington, Paul; Jones, Peter B; Chey, Tien; Ivancic, Lorraine; Marnane, Claire

    2012-12-18

    (EPCACE) [38]. Both constellations include symptoms of mistrust, hos- tility and alienation, characteristics akin to paranoia and other psychotic-like symptoms. Female Male 1.2 0.8-1.7 0.371 Area of residence Rural Urban 2.8 2.0-4.0 0.000* 2.1 1.3-3.2 0... are regarded as alien by others living in the same setting. Nevertheless, cultural factors could still be influential in the expression of symptoms. The traditional animistic faith remains influential in Timor Leste, a system that includes beliefs about curses...

  19. Search for new physics in high pT like-sign dilepton events at CDF II

    SciTech Connect (OSTI)

    Aaltonen, T.

    2011-10-25

    We present a search for new physics in events with two high pT leptons of the same electric charge, using data with an integrated luminosity of 6.1 fb-1. The observed data are consistent with standard model predictions. We set 95% C.L. lower limits on the mass of doubly-charged scalars decaying to like-sign dileptons, mH±± > 190 - 245 GeV/c2, depending on the decay mode and coupling.

  20. Improved constraints on the coupling constants of axion-like particles to nucleons from recent Casimir-less experiment

    E-Print Network [OSTI]

    G. L. Klimchitskaya; V. M. Mostepanenko

    2015-04-09

    We obtain improved constraints on the coupling constants of axion-like particles to nucleons from a recently performed Casimir-less experiment. For this purpose, the differential force between a Au-coated sphere and either Au or Si sectors of a rotating disc, arising due to two-axion exchange, is calculated. Over a wide region of axion masses from 1.7 meV to 0.9 eV the obtained constraints are stronger up to a factor of 60 than the previously known ones following from the Cavendish-type experiment and measurements of the effective Casimir pressure.