Sample records for likes picasolar wholly

  1. Picasolar | Department of Energy

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

    Bearing Analytics Purdue University 355 likes Bearing Analytics is a leading-edge equipment monitoring company aimed at pioneering a new era in industrial bearing condition...

  2. Picasolar | Department of Energy

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

    University 31 likes SiNode Systems is a battery materials venture developing silicon-graphene anodes for the next generation of lithium-ion batteries. SiNode anodes offer higher...

  3. Picasolar | Department of Energy

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

    Bioadhesive Alliance North Carolina A&T State University 1322 likes Bioadhesive Alliance Inc. is a developer and manufacturer of "PiGrid", bio-based adhesive that is green, low...

  4. Position: Polymer Chemist Company: ExxonMobil Research and Engineering Company, a wholly owned subsidiary of Exxon Mobil

    E-Print Network [OSTI]

    Alpay, S. Pamir

    candidate will apply his or her knowledge to improve existing olefin-based products and develop new ones productive collaborations internally and with outside research organizations, and grow new science areas. JobPosition: Polymer Chemist Company: ExxonMobil Research and Engineering Company, a wholly owned

  5. 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]

    Stamatakis, Alexandros

    Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy agriculture and food supply chains Optimized military supply chains Electric power and rail transportation No support for standard DB interfaces (e.g., ODBC) Standard database APIs not designed for "bursty" input

  6. Prepared by a wholly ow

    E-Print Network [OSTI]

    plants and Strategic Power Systems' ORAPWind® (Operational Reliability Analysis Program for Wind) data September 2013 Continuous Reliability Enhancement for Wind (CREW) Database: Wind Plant Reliability Benchmark Plant Reliability Benchmark, to publically report on CREW findings for the wind industry. The CREW

  7. 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]

    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

  8. Tissue-like phantoms

    DOE Patents [OSTI]

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

    2007-10-30T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

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

    2014-01-01T23:59:59.000Z

    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...

  10. Magmatic "Quantum-Like" Systems

    E-Print Network [OSTI]

    Elemer E Rosinger

    2008-12-16T23:59:59.000Z

    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.

  11. De tabellen zijn: likes(drinker, beer)

    E-Print Network [OSTI]

    Sidorova, Natalia

    De tabellen zijn: likes(drinker, beer) visits(drinker, bar) serves(bar, beer) De enige te maken die iemand lust die die bar bezoekt) bar(serves) - bar(serves - bar,beer(visits 1 likes))) 8. Geef(serves - bar,beer(visits 1 not likes)) not likes drinker(likes) (beer(serves) beer(likes)) - likes Of: bar

  12. Crystal-Like geometric modeling

    E-Print Network [OSTI]

    Landreneau, Eric Benjamin

    2006-08-16T23:59:59.000Z

    faces, symmetry, and fractal geometry. The techniques have also been implemented in software, as a proof of concept. They are used in an interactive geometric modeling system, in which users can use these techniques to create crystal-like shapes...

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

    E-Print Network [OSTI]

    Yee, Martha M

    2009-01-01T23:59:59.000Z

    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

  14. De tabellen zijn: likes(drinker, beer)

    E-Print Network [OSTI]

    Sidorova, Natalia

    De tabellen zijn: likes(drinker, beer) visits(drinker, bar) serves(bar, beer) De enige te maken dat ze lusten. {t | x visits(t[drinker] = x[drinker] y serves(x[bar] = y[bar] z likes(y[beer] = z[beer(x[bar] = y[bar] z likes : y[beer] = z[beer] z[drinker] = x[drinker] ))} drinker(visits 1 serves 1 not

  15. Crossover transition in bag-like models

    E-Print Network [OSTI]

    Ferroni, Lorenzo

    2009-01-01T23:59:59.000Z

    DE-AC02-05CH11231 Crossover transition in bag-like models L.We show that a crossover transition qualitatively similar toI. INTRODUCTION The phase transition of strongly interacting

  16. Transition between Tamm-like and Shockley-like surface states in optically induced photonic superlattices

    SciTech Connect (OSTI)

    Malkova, Natalia [Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132 (United States); National Institute of Standards and Technology and Joint Quantum Institute, University of Maryland, Gaithersburg, Maryland 20899 (United States); Hromada, Ivan; Wang Xiaosheng [Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132 (United States); Bryant, Garnett [National Institute of Standards and Technology and Joint Quantum Institute, University of Maryland, Gaithersburg, Maryland 20899 (United States); Chen Zhigang [Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132 (United States); Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education and TEDA Applied Physics School, Nankai University, Tianjin 300457 (China)

    2009-10-15T23:59:59.000Z

    We study the formation of Shockley-like surface states and their transition into Tamm-like surface states in an optically induced semi-infinite photonic superlattice. While perfect Shockley-like states appear only when the induced superlattice with alternating strong and weak bonds is terminated properly with an unperturbed surface, deformed Shockley-like surface states often appear in the so-called inverted band gap when the surface perturbation is nonzero. Furthermore, transitions between linear Tamm-like, Shockley-like, and nonlinear Tamm-like surface states are also observed by fine tuning the surface perturbation. Using coupled-mode theory, we confirm the existence of these linear and nonlinear surface states in a finite array of N identical single-mode waveguides coupled with alternating strong and weak bonds.

  17. The Aurora: What does it look like?

    E-Print Network [OSTI]

    Mojzsis, Stephen J.

    The Aurora: What does it look like? An introduction for elementary school-aged children #12 Eklund #12;Northern Hemisphere observers call them the Northern Lights or Aurora Borealis. Southern Hemisphere observers call them the Southern Lights or Aurora Australis. Courtesy of NASA #12;Courtesy of Tom

  18. Brain as quantum-like computer

    E-Print Network [OSTI]

    Andrei Khrennikov

    2005-03-24T23:59:59.000Z

    We present a contextualist statistical realistic model for quantum-like representations in physics, cognitive science and psychology. We apply this model to describe cognitive experiments to check quantum-like structures of mental processes. The crucial role is played by interference of probabilities for mental observables. Recently one of such experiments based on recognition of images was performed. This experiment confirmed our prediction on quantum-like behaviour of mind. In our approach ``quantumness of mind'' has no direct relation to the fact that the brain (as any physical body) is composed of quantum particles. We invented a new terminology ``quantum-like (QL) mind.'' Cognitive QL-behaviour is characterized by nonzero coefficient of interference $\\lambda.$ This coefficient can be found on the basis of statistical data. There is predicted not only $\\cos \\theta$-interference of probabilities, but also hyperbolic $\\cosh \\theta$-interference. This interference was never observed for physical systems, but we could not exclude this possibility for cognitive systems. We propose a model of brain functioning as QL-computer (there is discussed difference between quantum and QL computers).

  19. The Fourier-Like and Hartley-Like Wavelet Analysis Based on Hilbert Transforms

    E-Print Network [OSTI]

    Soares, L R; Cintra, R J

    2015-01-01T23:59:59.000Z

    In continuous-time wavelet analysis, most wavelet present some kind of symmetry. Based on the Fourier and Hartley transform kernels, a new wavelet multiresolution analysis is proposed. This approach is based on a pair of orthogonal wavelet functions and is named as the Fourier-Like and Hartley-Like wavelet analysis. A Hilbert transform analysis on the wavelet theory is also included.

  20. 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeedingBiomassPPPOPetroleum38Polaron BehaviorPolymer-like Nanowires Unique

  1. 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...

  2. Watermelon-like iron nanoparticles: Cr doping effect on magnetism...

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

    Watermelon-like iron nanoparticles: Cr doping effect on magnetism and magnetization interaction reversal. Watermelon-like iron nanoparticles: Cr doping effect on magnetism and...

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

    Energy Savers [EERE]

    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...

  4. Fixed-Point-Like Theorems on Subspaces

    E-Print Network [OSTI]

    Bich, Philippe; Cornet, Bernard

    2004-08-26T23:59:59.000Z

    denote by E? = {u ? Rn | ?x ? E, x u = 0} the orthogonal space to E. If u1, . . . ,uk belong to E, a vector space, we denote by span{u1, . . . ,uk} the vector subspace of E spanned by u1, . . . ,uk. Let V be a Euclidean space and let k be an integer... Fixed-point-like theorems on subspaces Take I = {1},V1 =Rn+1, k1 = n, J =?, and apply Theorem 2.1 to the correspondences Hk, which clearly satisfy the assumptions of Theorem 2.1. So there exists E ? Gn(Rn+1) such that E?Hk(E) #6;= ? for every k = 1...

  5. Entanglement Teleportation Through Cat-like States

    E-Print Network [OSTI]

    Sibasish Ghosh; Guruprasad Kar; Anirban Roy; Debasis Sarkar; Ujjwal Sen

    2000-12-20T23:59:59.000Z

    We first consider teleportation of entangled states shared between Claire and Alice to Bob1 and Bob2 when Alice and the two Bobs share a single copy of a GHZ-class state and where {\\it all} the four parties are at distant locations. We then generalize this situation to the case of teleportation of entangled states shared between Claire1, Claire2, ....., Claire(N-1) and Alice to Bob1, Bob2, ....., BobN when Alice and the N Bobs share a single copy of a Cat-like state and where again {\\it all} the 2N parties are at distant locations.

  6. 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolar Jump to:HoldingsTechint SpasourceFacebookLike Jump to: navigation,

  7. Apparatus for insulating windows and the like

    DOE Patents [OSTI]

    Mitchell, R.A.

    1984-06-19T23:59:59.000Z

    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.

  8. The lightcone of Gdel-like spacetimes

    E-Print Network [OSTI]

    G. Dautcourt

    2010-09-27T23:59:59.000Z

    A study of the lightcone of the G\\"odel universe is extended to the so-called G\\"odel-like spacetimes. This family of highly symmetric 4-D Lorentzian spaces is defined by metrics of the form $ds^2=-(dt+H(x)dy)^2+D^2(x)dy^2+dx^2+dz^2$, together with the requirement of spacetime homogeneity, and includes the G\\"odel metric. The quasi-periodic refocussing of cone generators with startling lens properties, discovered by Ozsv\\'{a}th and Sch\\"ucking for the lightcone of a plane gravitational wave and also found in the G\\"odel universe, is a feature of the whole G\\"odel family. We discuss geometrical properties of caustics and show that (a) the focal surfaces are two-dimensional null surfaces generated by non-geodesic null curves and (b) intrinsic differential invariants of the cone attain finite values at caustic subsets.

  9. Apparatus for insulating windows and the like

    DOE Patents [OSTI]

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

    1984-01-01T23:59:59.000Z

    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.

  10. Shock waves in Lifshitz-like spacetimes

    E-Print Network [OSTI]

    I. Ya. Aref'eva; A. A. Golubtsova

    2015-03-23T23:59:59.000Z

    We construct shock waves for Lifshitz-like geometries in four- and five-dimensional effective theories as well as in D3-D7 and D4-D6 brane systems. The solutions to the domain wall profile equations are found. Further, the study makes a connection with the implications for the quark-gluon plasma formation in heavy-ion collisions. According to the holographic approach, the multiplicity of particles produced in heavy-ion collisions can be estimated by the area of the trapped surface formed in shock wave collisions. We calculate the areas of trapped surfaces in the geometry of two colliding Lifshitz domain walls. Our estimates show that for five-dimensional cases with certain values of the critical exponent the dependence of multiplicity on the energy of colliding ions is rather close to the experimental data ${\\cal M} \\sim s^{\\,0.15}$ observed at RHIC and LHC.

  11. Trajectory generation for car-like robots

    SciTech Connect (OSTI)

    Vasseur, H.A.; Pin, F.G.

    1990-01-01T23:59:59.000Z

    Autonomous robots or remotely operated vehicles have raised high hopes in the military and industrial communities because of the potential safety improvement and gain of productivity they may provide. Waste management on nuclear sites, pallet manipulation in factories, interventions on battle-fields, etc., are actively studied. A lot of these applications require powerful four-wheel vehicles, the kinematics of which is similar to that of a car. Such vehicles have three degrees of freedom: the (x,y) positions in a plane and the orientation of the vehicle. Path planning is often understood as only changing the position of the vehicle, whereas the tasks performed by this kind of robot requires a perfect orientation of the vehicle: forklifting a pallet or docking at a loading or unloading station requires accuracy in the orientation of the vehicle. It is this requirement and the kinematic constraints of the motion mode which have led to the path-planning algorithm presented in this paper. The velocity of the robot belongs to a two-dimensional vectorial space. However, we assume that there is no slipping of the wheels. Therefore, at a given position, the direction of the velocity of the rear axle, is colinear with that of the vehicle. The equation conveying this constraint is not integrable and affects the velocity but not the space of the configurations of the robot: it is a non-holonomic constraint. If the steering angle of the front wheels is constant, the vehicle moves along a circle. Since the steering angle of the car-like robots is limited, the radius of the circle is always greater than a certain value which is the minimum radius of curvature of any achievable trajectory. 3 refs., 8 figs.

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

    E-Print Network [OSTI]

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

    2015-06-02T23:59:59.000Z

    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.

  13. Australian Mining carries rare-earth-like iron release | The...

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

    Australian Mining carries rare-earth-like iron release Australian Mining, the leading news source for the mining industry in Australia, carried a story on research Ames Lab...

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

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

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

  15. 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...

  16. Incremental-like Bundle Methods with Application to Energy Planning

    E-Print Network [OSTI]

    Gr gory Emiel

    2008-11-18T23:59:59.000Z

    Nov 18, 2008 ... Incremental-like Bundle Methods with Application to Energy Planning. Gr gory ... For a real-life application on the French power mix, we obtain...

  17. The Search for Extrasolar Earth-like planets

    E-Print Network [OSTI]

    S. Seager

    2003-05-19T23:59:59.000Z

    The search for extrasolar Earth-like planets is underway. Over 100 extrasolar giant planets are known to orbit nearby sun-like stars, including several in multiple-planet systems. These planetary systems are stepping stones for the search for Earth-like planets; the technology development, observational strategies, and science results can all be applied to Earth-like planets. Stars much less massive than the sun the most common stars in our Galaxy are being monitored for the gravitational influence of Earth-like planets. Although Earth-like planets orbiting sun-like stars are much more difficult to detect, space missions are being built to detect them indirectly due to their effects on the parent star and to quantify fundamental factors such as terrestrial planet frequency, size distribution, and mass distribution. Extremely ambitious space programs are being developed to directly detect Earth-like planets orbiting sun-like stars, and must tackle the immense technological challenge of blocking out the light of the parent star, which is brighter than the planet by six to ten orders of magnitude. Direct detection of radiation from the planet is necessary for the definitive goal of the search for Earth-like planets: the study of atmospheric spectral signatures for signs of severe disequilibrium chemistry that could be indicative of biological activity. In addition to technological development, a growing flurry of scientific activity has begun to: understand terrestrial planet formation and terrestrial planet frequency; model terrestrial-like planet atmospheres and evolution; articulate the biological signatures of our own Earth; and even to study Earth as an extrasolar planet by observation and analysis of the spatially unresolved Earth.

  18. Surface Plasmon Resonance-like integrated sensor at terahertz

    E-Print Network [OSTI]

    Skorobogatiy, Maksim

    Surface Plasmon Resonance-like integrated sensor at terahertz frequencies for gaseous analytesebec H3C3A7, Canada Abstract: Plasmon-like excitation at the interface between fully polymeric fiber sensor and gaseous analyte is demonstrated theoretically in terahertz regime. Such plasmonic excitation

  19. Towards a simplex-like method for conic programming

    E-Print Network [OSTI]

    Sivaramakrishnan, Kartik K.

    Towards a simplex-like method for conic programming Kartik Krishnan Department of Computing for conic optimization Primal simplex method for LP Notions of bfs and nondegeneracy in SDP Our simplex-like approach for SDP Preliminary computational results Conclusions and future work 1 #12

  20. Evolution by Learning Consequences of choosing like your mother

    E-Print Network [OSTI]

    Utrecht, Universiteit

    , there exists a large variety in the details of different types of learning processes such as habituationEvolution by Learning Consequences of choosing like your mother Joost Beltman #12;Beltman, Joost Bernardus Evolution by Learning Consequences of choosing like your mother Proefschrift Universiteit Leiden

  1. About homotopy perturbation method for solving heat-like and wave-like equations with variable coefficients

    E-Print Network [OSTI]

    Francisco M. Fernandez

    2008-11-17T23:59:59.000Z

    We analyze a recent application of homotopy perturbation method to some heat-like and wave-like models and show that its main results are merely the Taylor expansions of exponential and hyperbolic functions. Besides, the authors require more boundary conditions than those already necessary for the solution of the problem by means of power series.

  2. Entanglement like properties in Spin-Orbit Coupled Ultra Cold Atom and violation of Bell like Inequality

    E-Print Network [OSTI]

    Rahul Kumar; Sankalpa Ghosh

    2015-03-13T23:59:59.000Z

    We show that the general quantum state of synthetically spin-orbit coupled ultra cold bosonic atom whose condensate was experimentally created recently ( Y. J. Lin {\\it et al.}, Nature, {\\bf 471}, 83, (2011)), shows entanglement between motional degrees of freedom ( momentum) and internal degrees of freedom (hyperfine spin). We demonstrate the violation of Bell-like inequality (CHSH) for such states that provides a unique opportunity to verify fundamental principle like quantum non-contextuality for commutating observables which are not spatially separated. We analyze in detail the Rabi oscillation executed by such atom-laser system and how that influneces quantities like entanglement entropy, violation of Bell like Inequality etc. We also discuss the implication of our result in testing the quantum non-contextuality and Bell's Inequality vioaltion by macroscopic quantum object like Bose-Einstein Condensate of ultra cold atoms.

  3. 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

  4. IDENTIFYING CURRENT-SHEETLIKE STRUCTURES IN THE SOLAR WIND

    E-Print Network [OSTI]

    Li, Gang

    2008-01-01T23:59:59.000Z

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

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

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

    are a lot like TAT The Training and Technology (TAT) School that flourished at Y-12 from 1966 to 1984 served as a model for other training programs. Y-12's long history of...

  6. Shale Gas Application in Hydraulic Fracturing Market is likely...

    Open Energy Info (EERE)

    Shale Gas Application in Hydraulic Fracturing Market is likely to grow at a rate of 6.46%, owing to increased natural gas demand Home > Groups > Renewable Energy RFPs Wayne31jan's...

  7. Defects and impurities in graphene-like materials

    E-Print Network [OSTI]

    Terrones, Mauricio

    Graphene-like materials could be used in the fabrication of electronic and optoelectronic devices, gas sensors, biosensors, and batteries for energy storage. Since it is almost impossible to work with defect-free or ...

  8. Texture 4 zero Fritzsch-like lepton mass matrices

    E-Print Network [OSTI]

    Gulsheen Ahuja; Sanjeev Kumar; Monika Randhawa; Manmohan Gupta; S. Dev

    2008-02-20T23:59:59.000Z

    For Majorana or Dirac neutrinos, using Fritzsch-like texture 4 zero mass matrices with parallel texture structures for the charged leptons and the Dirac neutrino mass matrix (M_{\

  9. Collisional Plasma Models with APEC/APED: Emission Line Diagnostics of Hydrogen-like and Helium-like Ions

    E-Print Network [OSTI]

    Randall K. Smith; Nancy S. Brickhouse; Duane A. Liedahl; John C. Raymond

    2001-06-26T23:59:59.000Z

    New X-ray observatories (Chandra and XMM-Newton) are providing a wealth of high-resolution X-ray spectra in which hydrogen- and helium-like ions are usually strong features. We present results from a new collisional-radiative plasma code, the Astrophysical Plasma Emission Code (APEC), which uses atomic data in the companion Astrophysical Plasma Emission Database (APED) to calculate spectral models for hot plasmas. APED contains the requisite atomic data such as collisional and radiative rates, recombination cross sections, dielectronic recombination rates, and satellite line wavelengths. We compare the APEC results to other plasma codes for hydrogen- and helium-like diagnostics, and test the sensitivity of our results to the number of levels included in the models. We find that dielectronic recombination with hydrogen-like ions into high (n=6-10) principal quantum numbers affects some helium-like line ratios from low-lying (n=2) transitions.

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

    SciTech Connect (OSTI)

    Aubert, Gilles, E-mail: gaubert@unice.fr [Universite de Nice Sophia Antipolis, Laboratoire J.A. Dieudonne (France)] [Universite de Nice Sophia Antipolis, Laboratoire J.A. Dieudonne (France); Blanc-Feraud, Laure, E-mail: Laure.Blanc-Feraud@inria.fr; Graziani, Daniele, E-mail: Daniele.Graziani@inria.fr [Inria, Morpheme CNRS/INRIA/UNSA Sophia Antipolis (France)] [Inria, Morpheme CNRS/INRIA/UNSA Sophia Antipolis (France)

    2013-02-15T23:59:59.000Z

    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. Nonclassical polarization dynamics in classical-like states

    E-Print Network [OSTI]

    Alfredo Luis; Angel S. Sanz

    2014-12-23T23:59:59.000Z

    Quantum polarization is investigated by means of a trajectory picture based on the Bohmian formulation of quantum mechanics. Relevant examples of classical-like two-mode field states are thus examined, namely Glauber and SU(2) coherent states. Although these states are often regarded as classical, the analysis here shows that the corresponding electric-field polarization trajectories display topologies very different from those expected from classical electrodynamics. Rather than incompatibility with the usual classical model, this result demonstrates the dynamical richness of quantum motions, determined by local variations of the system quantum phase in the corresponding (polarization) configuration space, absent in classical-like models. These variations can be related to the evolution in time of the phase, but also to its dependence on configurational coordinates, which is the crucial factor to generate motion in the case of stationary states like those here considered. In this regard, for completeness these results are compared those obtained from nonclassical N00N states.

  12. Relativistic Hydrogen-Like Atom on a Noncommutative Phase Space

    E-Print Network [OSTI]

    Huseyin Masum; Sayipjamal Dulat; Mutallip Tohti

    2012-02-12T23:59:59.000Z

    The energy levels of hydrogen-like atom on a noncommutative phase space were studied in the framework of relativistic quantum mechanics. The leading order corrections to energy levels 2S_{1/2}, 2P_{1/2} and 2P_{3/2} were obtained by using the \\theta and the \\bar\\theta modified Dirac Hamiltonian of hydrogen-like atom on a noncommutative phase space. The degeneracy of the energy levels 2P_{1/2} and 2P_{3/2} were removed completely by \\theta-correction. And the \\bar\\theta-correction shifts these energy levels.

  13. Parametric Resonance and Dark Matter Axion-Like Particles

    E-Print Network [OSTI]

    Arza, Ariel; Gamboa, Jorge

    2015-01-01T23:59:59.000Z

    We study the local effects of an external time-dependent magnetic field on axion-like particles assuming they are all the dark matter of the universe. We find that under suitable conditions the amplitude of the dark matter field can resonate parametrically. The resonance depends on the velocity of the axion-like particles and scales quadratically with the strength} of the external magnetic field, $\\frac{\\rho}{\\rho_{DM}} \\sim {B_0}^3$. By considering typical experimental benchmark values, we find the resonance could amplify around two orders of magnitude the local energy density stored in the dark matter condensate.

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

    E-Print Network [OSTI]

    E. K. Loginov; E. D. Loginova

    2014-10-10T23:59:59.000Z

    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.

  15. books & arts Science fiction is like jazz --people think they

    E-Print Network [OSTI]

    Loss, Daniel

    books & arts On our bookshelf Science fiction is like jazz -- people think they know what it is. Clarke, for example, was almost always about the reaction of people to advanced technology; that of H. G, is the curious novella Flatland: A Romance of Many Dimensions (1884). Flatland is set in a universe of two

  16. Virtual MISO Triggers in Wi-Fi-like Networks

    E-Print Network [OSTI]

    Virtual MISO Triggers in Wi-Fi-like Networks Oscar Bejarano Edward W. Knightly 1 Thursday, April 11 difficult to achieve in mobile devices Thursday, April 11, 2013 #12;5 Virtual MISO (vMISO) TX RX vMISO, 2013 #12;1. System Model 1.1. Distributed System 1.2. Single-Antenna Nodes 6 vMISO

  17. Parton energy loss due to synchrotron-like gluon emission

    E-Print Network [OSTI]

    B. G. Zakharov

    2008-09-03T23:59:59.000Z

    We develop a quasiclassical theory of the synchrotron-like gluon radiation. Our calculations show that the parton energy loss due to the synchrotron gluon emission may be important in the jet quenching phenomenon if the plasma instabilities generate a sufficiently strong chromomagnetic field. Our gluon spectrum disagrees with that obtained by Shuryak and Zahed within the Schwinger's proper time method.

  18. Spectral Fingerprints of Earth-like Planets Around FGK Stars

    E-Print Network [OSTI]

    Rugheimer, Sarah

    We present model atmospheres for an Earth-like planet orbiting the entire grid of main sequence FGK stars with effective temperatures ranging from T[subscript eff]=4250?K to T[subscript eff]=7000?K in 250?K intervals. We ...

  19. The Sun like we have never seen it before

    E-Print Network [OSTI]

    CONTENTS The Sun like we have never seen it before Strong support for STFC Science from Government-Object Adaptive Optics ISSUE 5 - March 2011 News from the Science and Technology Facilities Council Exploring zero to liquid nitrogen temperatures they have no electrical resis

  20. Evidence for an anomalous like-sign dimuon charge asymmetry

    SciTech Connect (OSTI)

    Abazov, Victor Mukhamedovich; /Dubna, JINR; Abbott, Braden Keim; /Oklahoma U.; Abolins, Maris A.; /Michigan State U.; Acharya, Bannanje Sripath; /Tata Inst.; Adams, Mark Raymond; /Illinois U., Chicago; Adams, Todd; /Florida State U.; Aguilo, Ernest; /York U., Canada; Alexeev, Guennadi D.; /Dubna, JINR; Alkhazov, Georgiy D.; /St. Petersburg, INP; Alton, Andrew K.; /Michigan U. /Augustana Coll., Sioux Falls; Alverson, George O.; /Northeastern U. /Rio de Janeiro, CBPF

    2010-05-01T23:59:59.000Z

    We measure the charge asymmetry A of like-sign dimuon events in 6.1 fb{sup -1} of p{bar p} collisions recorded with the DO detector at a center of mass energy sqrt s = 1.96 TeV at the Fermilab Tevatron Collider.

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  2. Auger transition rates for Ar-like ions

    SciTech Connect (OSTI)

    Chung, Sang-Young [Physics Department, POSTECH, San 31 Hyojadong, Nam Ku, Pohang, Kyungbuk 790-784 (Korea, Republic of); Kagawa, Takashi [Department of Physics, Nara Women's University, Nara 630-8506 (Japan); Moribayashi, Kengo [Japan Atomic Energy Agency, 8-1, Umemidai, Kizu-cho, Kyoto 619-0215 (Japan); Kim, Dong Eon [Physics Department, POSTECH, San 31 Hyojadong, Nam Ku, Pohang, Kyungbuk 790-784 (Korea, Republic of)], E-mail: kimd@postech.ac.kr

    2009-03-15T23:59:59.000Z

    The Auger transition rates for Ar-like ions have been calculated by the relativistic configuration interaction code and flexible atomic code. The calculations have been carried out for the atomic numbers from 18 to 54, that is, for argon to xenon. The calculated data for argon is shown to be in a good agreement with experimental data and other calculated data.

  3. 1 INTRODUCTION Critical infrastructures (CIs) like the electricity,

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    1 INTRODUCTION Critical infrastructures (CIs) like the electricity, oil & gas supply, rail, road when electric power disruptions at various times curtailed natural gas production (first order ef and An All-Hazard Approach for the Vulnerability Analysis of Critical Infrastructures E.Zio Ecole Centrale

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

    E-Print Network [OSTI]

    Agrawala, Maneesh

    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

  5. RESEARCH ARTICLE Open Access Defined -synuclein prion-like molecular

    E-Print Network [OSTI]

    Boyer, Edmond

    form, -syn is enriched in -sheet structure, orderly organized into oligomers or amyloid fibrils [5 fibrils. Importantly, using -syn short amyloid fibrils as seed, endogenous -syn aggregates and accumulates pathogenic proteins that form amyloid-like inclusions within the cells. This is also the case of -syn which

  6. Trouble with space-like noncommutative field theory

    E-Print Network [OSTI]

    V. Gayral; J. M. Gracia-Bondia; F. Ruiz Ruiz

    2005-02-03T23:59:59.000Z

    It is argued that the one-loop effective action for a space-like noncommutative scalar field theory does not exist. This indicates that such theories are not renormalizable already at one loop order and suggests supersymmetrization and reinvestigating other types of noncommutativity.

  7. Photon-like flying qubit in the coupled cavity array

    E-Print Network [OSTI]

    Ying Li; M. X. Huo; Z. Song; C. P. Sun

    2008-02-01T23:59:59.000Z

    We propose a feasible scheme to realize a spin network via a coupled cavity array with the appropriate arrangement of external multi-driving lasers. It is demonstrated that the linear photon-like dispersion is achievable and this property opens up the possibility of realizing the pre-engineered spin network which is beneficial to quantum information processing.

  8. Structure and Dynamics of Earth-like Planets

    E-Print Network [OSTI]

    Structure and Dynamics of Earth-like Planets Jeudi 20 et vendredi 21 novembre 2014. Amphithtre Antonangeli, UPMC, Paris 10h50 Coffee Break 11h20 Structure and Dynamics of the Interior of Mercury: What we 09h40 Moon Internal Structure from Apollo Seismic Data: a Corner Stone for Planetary Seismology

  9. 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

  10. Spectroscopy of M-shell x-ray transitions in Zn-like through Co-like W

    SciTech Connect (OSTI)

    Clementson, J; Beiersdorfer, P; Brown, G V; Gu, M F

    2009-07-08T23:59:59.000Z

    The M-shell x-ray emission of highly charged tungsten ions has been investigated at the Livermore electron beam ion trap facility. Using the SuperEBIT electron beam ion trap and a NASA x-ray calorimeter array, transitions connecting the ground configurations in the 1500-3600 eV spectral range of zinc-like W{sup 44+} through cobalt-like W{sup 47+} have been measured. The measured spectra are compared with theoretical line positions and emissivities calculated using the FAC code.

  11. Realization of GHZ-like and W-like Third-order Spatial Correlation with Classical Light

    E-Print Network [OSTI]

    Er-Feng Zhang; Wei-Tao Liu; Ping-Xing Chen

    2015-02-17T23:59:59.000Z

    The spatial correlation of chaotic light has been an interesting and fundamentally important topic [G. Scarcelli, V. Berardi, and Y. Shih, Phys. Rev. Lett. 96, 063602 (2006)]. Here, we provide a unified model for the third-order spatial correlation effect with three chaotic lights. With the model we present a scheme to produce Greenberger-Horne-Zeilinger-like (GHZ-like) spatial correlation with classical light, and show that the third-order spatial correlation of the thermal light has the aspect similar to the W states.

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

    DOE Patents [OSTI]

    Hagelstein, P.L.

    1987-04-21T23:59:59.000Z

    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.

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

    DOE Patents [OSTI]

    Hagelstein, P.

    1982-03-26T23:59:59.000Z

    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/.

  14. 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

  15. Method for producing fluorinated diamond-like carbon films

    DOE Patents [OSTI]

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

    2003-06-03T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Csernai, L P

    2015-01-01T23:59:59.000Z

    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. Photon-Axion-Like Particle Coupling Constant and Cosmological Observations

    E-Print Network [OSTI]

    M. Yu. Piotrovich; Yu. N. Gnedin; T. M. Natsvlishvili

    2008-05-23T23:59:59.000Z

    We estimated the photon-pseudoscalar particle mixing constant from the effect of cosmological alignment and cosmological rotation of polarization plane of distant QSOs. This effect is explained in terms of birefringent phenomenon due to photon-pseudoscalar (axion-like) particle mixing in a cosmic magnetic field. On the contrary, one can estimate the strength of the cosmic magnetic field using the constraints on the photon-axion-like particle coupling constant from the CAST experiment and from SNe Ia dimming effect. In a result, the lower limit on the intergalactic ($z\\approx 1\\div 2$) magnetic field appears at the level of about $4\\times 10^{-10}\\div 10^{-11}$ G.

  18. Axion Like Particles and the Inverse Seesaw Mechanism

    E-Print Network [OSTI]

    Carvajal, C D R; Nishi, C C; Snchez-Vega, B L

    2015-01-01T23:59:59.000Z

    Light pseudoscalars known as axion like particles (ALPs) may be behind physical phenomena like the Universe transparency to ultra-energetic photons, the soft $\\gamma$-ray excess from the Coma cluster, and the 3.5 keV line. We explore the connection of these particles with the inverse seesaw (ISS) mechanism for neutrino mass generation. We propose a very restrictive setting where the scalar field hosting the ALP is also responsible for generating the ISS mass scales through its vacuum expectation value on gravity induced nonrenormalizable operators. A discrete gauge symmetry protects the theory from the appearance of overly strong gravitational effects and discrete anomaly cancellation imposes strong constraints on the order of the group. The anomalous U$(1)$ symmetry leading to the ALP is an extended lepton number and the protective discrete symmetry can be always chosen as a subgroup of a combination of the lepton number and the baryon number.

  19. The A-like matrices for a hypercube

    E-Print Network [OSTI]

    Miklavic, Stefko

    2010-01-01T23:59:59.000Z

    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.

  20. Worm-like Polymer Loops and Fourier Knots

    E-Print Network [OSTI]

    S. Rappaport; Y. Rabin; A. Yu. Grosberg

    2006-03-02T23:59:59.000Z

    Every smooth closed curve can be represented by a suitable Fourier sum. We show that the ensemble of curves generated by randomly chosen Fourier coefficients with amplitudes inversely proportional to spatial frequency (with a smooth exponential cutoff), can be accurately mapped on the physical ensemble of worm-like polymer loops. We find that measures of correlation on the scale of the entire loop yield a larger persistence length than that calculated from the tangent-tangent correlation function at small length scales. The conjecture that physical loops exhibit additional rigidity on scales comparable to the entire loop due to the contribution of twist rigidity, can be tested experimentally by determining the persistence length from the local curvature and comparing it with that obtained by measuring the radius of gyration of dsDNA plasmids. The topological properties of the ensemble randomly generated worm-like loops are shown to be similar to that of other polymer models.

  1. Electroweak baryogenesis in the MSSM with vector-like superfields

    E-Print Network [OSTI]

    Xue Chang; Ran Huo

    2014-03-06T23:59:59.000Z

    Introducing heavy particles with strong couplings to the Higgs field can strengthen electroweak phase transition, through the entropy release mechanism from both bosons and fermions. We analyze the possibility of electroweak baryogenesis in the MSSM with new vector-like superfields. The new vector-like particles belong to the representation 5+5bar+10+10bar of SU(5). By analyzing in detail the effective potential at finite temperature, we show that a strongly first order electroweak phase transition in this model is ruled out by a combination of 125 GeV Higgs requirement, the bound for exotic quarks, the gluon fusion Higgs production rate and the Higgs diphoton decay rate as well as the electroweak precision measurement.

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

    E-Print Network [OSTI]

    Andre Rubbia; Alexander Sakharov

    2008-09-03T23:59:59.000Z

    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.

  3. New polarimetric constraints on axion-like particles

    SciTech Connect (OSTI)

    Payez, A.; Cudell, J.R.; Hutsemkers, D., E-mail: A.Payez@ulg.ac.be, E-mail: JR.Cudell@ulg.ac.be, E-mail: D.Hutsemekers@ulg.ac.be [AGO Dept., U. of Lige, alle du 6 aot 17, Lige (Belgium)

    2012-07-01T23:59:59.000Z

    We show that the parameter space of axion-like particles can be severely constrained using high-precision measurements of quasar polarisations. Robust limits are derived from the measured bounds on optical circular polarisation and from the distribution of linear polarisations of quasars. As an outlook, this technique can be improved by the observation of objects located behind clusters of galaxies, using upcoming space-borne X-ray polarimeters.

  4. Remote Inflation as hybrid-like sneutrino/MSSM inflation

    E-Print Network [OSTI]

    Tomohiro Matsuda

    2009-07-03T23:59:59.000Z

    A new scenario of hybrid-like inflation is considered for sneutrino and MSSM fields. Contrary to the usual hybrid inflation model, the direct coupling between a trigger field and the sneutrino/MSSM inflaton field is not necessary for the scenario. The dissipation and the radiation from the sneutrino/MSSM inflaton can be written explicitly by using the Yukawa couplings. Remote inflation does not require the shift symmetry or cancellation in solving the eta-problem.

  5. Hydrino like states in graphene and Aharonov-Bohm field

    E-Print Network [OSTI]

    Pulak Ranjan Giri

    2008-08-25T23:59:59.000Z

    We study the dynamics of fermions on graphene in presence of Coulomb impurities and Aharonov-Bohm field. Special emphasis is given to the formation of hydrino like states and its lifting of degeneracy due to the presence of AB field. The flux of the AB field can be tuned to make the low angular momentum hydrino states stable against decay. The zero limit physics of the two coupling constants \\alpha_G and \\Phi involved in the system is discussed.

  6. Hydrino like states in graphene and Aharonov-Bohm field

    E-Print Network [OSTI]

    Giri, Pulak Ranjan

    2008-01-01T23:59:59.000Z

    We study the dynamics of fermions on graphene in presence of Coulomb impurities and Aharonov-Bohm field. Special emphasis is given to the formation of hydrino like states and its lifting of degeneracy due to the presence of AB field. The flux of the AB field can be tuned to make the low angular momentum hydrino states stable against decay. The zero limit physics of the two coupling constants \\alpha_G and \\Phi involved in the system is discussed.

  7. New constraints for heavy axion-like particles from supernovae

    SciTech Connect (OSTI)

    Giannotti, M.; Nita, R. [Physical Sciences, Barry University, Miami Shores, FL 33161 (United States); Duffy, L.D., E-mail: mgiannotti@mail.barry.edu, E-mail: ldd@lanl.gov, E-mail: Rafaela.Nita@mymail.barry.edu [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)

    2011-01-01T23:59:59.000Z

    We derive new constraints on the coupling of heavy pseudoscalar (axion-like) particles to photons, based on the gamma ray flux expected from the decay of these particles into photons. After being produced in the supernova core, these heavy axion-like particles would escape and a fraction of them would decay into photons before reaching the Earth. We have calculated the expected flux on Earth of these photons from the supernovae SN 1987A and Cassiopeia A and compared our results to data from the Fermi Large Area Telescope. This analysis provides strong constraints on the parameter space for axion-like particles. For a particle mass of 100 MeV, we find that the Peccei-Quinn constant, f{sub a}, must be greater than about 10{sup 15} GeV. Alternatively, for f{sub a} = 10{sup 12} GeV, we exclude the mass region between approximately 100 eV and 1 GeV.

  8. Distribution of Ds-like sequences in genomes of cereals

    SciTech Connect (OSTI)

    Vershinin, A.V.; Salina, E.A.; Shumnii, V.K.; Svitashev, S.K.

    1986-07-01T23:59:59.000Z

    It has been suggested that insertions of Ds-elements may alter the effectiveness of transcription or translation of the genetic loci and the normal processing of introns and exons, and that they may impair coding frames, etc. The object of the present study was to determine the frequency of occurence of DNA sequences similar to the Ds-controlling elements of mazie (Ds-like sequences) among other representatives of cereals. The conservative feature of the primary structure of transposons from different eukaryotic species served as a basis in this investigation. By means of the ''nick-translation'' reaction with the aid of DNA-polymerase I (alpha-/sup 32/P) dCTP or TTP was introduced into the Ds-element. The specific radioactivity of the preparations obtained was 5 x 10/sup 7/ to 1 x 10/sup 8/ cpm/gamma. From the results obtained, it is suggested that the genomes of cereals examined contain a collection of Ds-like sequences. The Ds-element may have a significant effect on gene expression in the presence of Ac-like or other sequences, which undergo transposition.

  9. What Fraction of Sun-like Stars have Planets?

    E-Print Network [OSTI]

    Charles H. Lineweaver; Daniel Grether

    2003-09-12T23:59:59.000Z

    The radial velocities of ~1800 nearby Sun-like stars are currently being monitored by eight high-sensitivity Doppler exoplanet surveys. Approximately 90 of these stars have been found to host exoplanets massive enough to be detectable. Thus at least ~5% of target stars possess planets. If we limit our analysis to target stars that have been monitored the longest (~15 years), ~11% possess planets. If we limit our analysis to stars monitored the longest and whose low surface activity allow the most precise velocity measurements, ~25% possess planets. By identifying trends of the exoplanet mass and period distributions in a sub-sample of exoplanets less-biased by selection effects, and linearly extrapolating these trends into regions of parameter space that have not yet been completely sampled, we find at least ~9% of Sun-like stars have planets in the mass and orbital period ranges Msin(i) > 0.3 M_Jupiter and P 0.1 M_Jupiter and P < 60 years. Even this larger area of the mass-period plane is less than 20% of the area occupied by our planetary system, suggesting that this estimate is still a lower limit to the true fraction of Sun-like stars with planets, which may be as large as ~100%.

  10. Atomic data and theoretical X-ray spectra of Ge-like through V-like W ions

    SciTech Connect (OSTI)

    Clementson, J., E-mail: joel.clementson@ipp.mpg.de [Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States); Department of Physics, Lund University, SE-221 00 Lund (Sweden); Beiersdorfer, P. [Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States)] [Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States); Brage, T. [Department of Physics, Lund University, SE-221 00 Lund (Sweden)] [Department of Physics, Lund University, SE-221 00 Lund (Sweden); Gu, M.F. [University of California at Berkeley, Berkeley, CA 94720 (United States)] [University of California at Berkeley, Berkeley, CA 94720 (United States)

    2014-03-15T23:59:59.000Z

    The atomic structure and spectra of ten tungsten ions have been calculated using the Flexible Atomic Code. The calculations yield energy levels, radiative lifetimes, spectral line positions, transition probability rates, and oscillator strengths for the tungsten ions isoelectronic to germanium, W{sup 42+}, through vanadium, W{sup 51+}. Collisionalradiative models for high-temperature, low-density plasmas have been implemented to produce line emissivities for X-ray transitions in the 14 keV (312 ?) spectral interval. The Ge-like through V-like W ions are important in nuclear fusion research where their spectra may provide diagnostic information on magnetically confined plasmas.

  11. amorphous diamond-like carbon: Topics by E-print Network

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

    2 Atmospheric plasma deposition of diamond-like carbon coatings Angela M. Ladwig a,b, Materials Science Websites Summary: Atmospheric plasma deposition of diamond-like carbon...

  12. adherent diamond-like carbon: Topics by E-print Network

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

    2 Atmospheric plasma deposition of diamond-like carbon coatings Angela M. Ladwig a,b, Materials Science Websites Summary: Atmospheric plasma deposition of diamond-like carbon...

  13. ASTEROIDAL GRANITE-LIKE MAGMATISM 4.53 GYR AGO

    SciTech Connect (OSTI)

    Terada, Kentaro [Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima 739-8526 (Japan); Bischoff, Addi [Institut fuer Planetologie, Westflische Wilhelms-Universitt Muenster, Wilhelm-Klemm-Str. 10, 48149 Muenster (Germany)], E-mail: terada@sci.hiroshima-u.ac.jp

    2009-07-10T23:59:59.000Z

    Constraining the timescales for the evolution of planetary bodies in our solar system is essential for a complete understanding of planet-forming processes. However, frequent collisions between planetesimals in the early solar system obscured and destroyed much of the primitive features of the old, first-generation planetary bodies. The presence of differentiated, achondritic clasts in brecciated chondrites and of chondritic fragments in achondritic breccias clearly witness multiple processes such as metamorphism, magmatism, fragmentation, mixing, and reaccretion. Here, we report the results of ion microprobe Pb-Pb dating of a granite-like fragment found in a meteorite, the LL3-6 ordinary chondrite regolith breccia Adzhi-Bogdo. Eight spot analyses of two phosphate grains and other co-genetic phases of the granitoid give a Pb-Pb isochron age of 4.48 {+-} 0.12 billion years (95% confidence) and a model age of 4.53 {+-} 0.03 billion years (1{sigma}), respectively. These ages represent the crystallization age of a parental granite-like magma that is significantly older than those of terrestrial (4.00-4.40 Gyr) and lunar granites (3.88-4.32 Gyr) indicating that the clast in Adzhi-Bogdo is the oldest known granitoid in the solar system. This is the first evidence that granite-like formation is not only a common process on Earth, but also occurred on primitive asteroids in the early solar system 4.53 Gyr ago. Thus, the discovery of granite magmatism recorded in a brecciated meteorite provides an innovative idea within the framework of scenarios for the formation and evolution of planetary bodies and possibly exoplanetary bodies.

  14. Non-commutative Field Theory with Twistor-like Coordinates

    E-Print Network [OSTI]

    Tomasz R. Taylor

    2007-09-16T23:59:59.000Z

    We consider quantum field theory in four-dimensional Minkowski spacetime, with the position coordinates represented by twistors instead of the usual world-vectors. Upon imposing canonical commutation relations between twistors and dual twistors, quantum theory of fields described by non-holomorphic functions of twistor variables becomes manifestly non-commutative, with Lorentz symmetry broken by a time-like vector. We discuss the free field propagation and its impact on the short- and long-distance behavior of physical amplitudes in perturbation theory. In the ultraviolet limit, quantum field theories in twistor space are generically less divergent than their commutative counterparts. Furthermore, there is no infrared--ultraviolet mixing problem.

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

    E-Print Network [OSTI]

    George Ruppeiner; Peter Mausbach; Helge-Otmar May

    2014-11-11T23:59:59.000Z

    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.

  16. 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)

    2008-12-02T23:59:59.000Z

    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.

  17. Glass-Like Heat Conduction in Crystalline Semiconductors

    SciTech Connect (OSTI)

    Nolas, G.S.; Cohn, J.L.; Chakoumakos, B.C.; Slack, G.A.

    1999-06-13T23:59:59.000Z

    The thermal conductivity and structural properties of polycrystalline and single crystal semiconductor type-1 germanium clathrates are reported. Germanium clathrates exhibit thermal conductivities that are typical of amorphous materials. This behavior occurs in spite of their well-defined crystalline structure. The authors employ temperature dependent neutron diffraction data in investigating the displacements of the caged strontium atoms in Sr{sub 8}Ga{sub 16}Ge{sub 30} and their interaction with the polyhedral cages that entrap them. Their aim is to investigate the correlation between the structural properties and the low, glass-like thermal conductivity observed in this compound.

  18. Characterization of Glass-Like Fragments from the 3714 Building

    SciTech Connect (OSTI)

    Buck, Edgar C.

    2010-02-23T23:59:59.000Z

    This report describes characterization of a sample obtained from the 3714 building in the 300 Area. Characterization of this unknown material was required for the demonolition activities in the 300 Area. The object of the study was to dertermine the nature of the material, composition, possible structure, evidence for hazards components. The green material is a sodium alumino-silicate glass. This conclusion is based on the composition provided by SEM-EDS, and the images that suggest a glass-like morphology. Further analysis with Ramin and/or infrared could be used to determine the presence of any organics.

  19. 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

    2007-12-18T23:59:59.000Z

    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.

  20. Cards let a PDP-11 work like a VAX

    SciTech Connect (OSTI)

    Barney, C.

    1984-05-17T23:59:59.000Z

    The PDP-11 computer is still used widely, in part because of its many peripherals and software applications. For less than $7000, a new board-level product from American Information Systems Inc. promises to give the PDP-11 renewed life as a dual processor based on a UNIX-like operating system with more power than a VAX, its younger superminicomputer cousin. National Semiconductor Corp's 32032 is the foundation of the AIS/3210 system, which also includes a national 16082 memory-management chip and a 16081 floating-point-processor chip. One or more processor boards and memory boards from AIS plug directly into a 16-bit q bus.

  1. Effect of radiation-like solid on CMB anisotropies

    E-Print Network [OSTI]

    Vladimr Balek; Matej kovran

    2015-01-28T23:59:59.000Z

    We compute the power in the lowest multipoles of CMB anisotropies in the presence of radiation-like solid, a hypothetical new kind of radiation with nonzero shear modulus. If only the ordinary Sachs-Wolfe effect is taken into account, the shear modulus to energy density ratio must be in absolute value of order $10^{-5}$ or less for the theory to be consistent with observations within cosmic variance. With the integrated Sachs-Wolfe effect switched on, the constraint is relaxed almost by two orders of magnitude.

  2. Schwarzschild-like metric and a quantum vacuum

    E-Print Network [OSTI]

    P. R. Silva

    2013-02-01T23:59:59.000Z

    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.

  3. Diamond and diamond-like films for transportation applications

    SciTech Connect (OSTI)

    Perez, J.M.

    1993-01-01T23:59:59.000Z

    This section is a compilation of transparency templates which describe the goals of the Office of Transportation Materials (OTM) Tribology Program. The positions of personnel on the OTM are listed. The role and mission of the OTM is reviewed. The purpose of the Tribology Program is stated to be `to obtain industry input on program(s) in tribology/advanced lubricants areas of interest`. The objective addressed here is to identify opportunities for cost effective application of diamond and diamond-like carbon in transportation systems.

  4. Comment on Quantum teleportation via GHZ-like state

    E-Print Network [OSTI]

    Anindita Banerjee; Kamal Patel; Anirban Pathak

    2010-06-08T23:59:59.000Z

    Recently Yang et al. [Int. J. Theo. Phys. 48 (2009) 516] have shown that an unknown qubit can be teleported by using a particular GHZ-like state as quantum channel. However, there are several errors in the calculation which lead to incorrect conclusions. The errors have been indicated and corrected. It is also noted that their scheme and the independently proposed teleportation scheme of Zhang et al. [Int. J. Theo. Phys. 48 (2009) 3331] uses quantum channel from the same family and any state of that family may be used for teleportation.

  5. Create The Look You Like-With Color.

    E-Print Network [OSTI]

    Rhoades, Beverly

    1984-01-01T23:59:59.000Z

    and 8-1326 Create The Look You Like- With Texture. DIMENSIONS OF COLOR To become more familiar with the dimensions of color, let's consider a few principles. Hue refers to the name of a color. Primary hues are red, yellow and blue. These cannot... and are arranged between the primary colors on the color Wheel : purple or violet-a combination of red and blue green - a combination of blue and yellow orange-a combination of red and yellow , Extension consumer information specailist, The Texas A&M University...

  6. Promise for Onion-Like Carbons as Supercapacitors

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeedingTechnical News,Program DirectionProjectPromise for Onion-Like

  7. Spectral Fingerprints of Earth-like Planets Around FGK Stars

    E-Print Network [OSTI]

    Rugheimer, Sarah; Zsom, Andras; Segura, Antgona; Sasselov, Dimitar

    2012-01-01T23:59:59.000Z

    We present model atmospheres for an Earth-like planet orbiting the entire grid of main sequence FGK stars with effective temperatures ranging from Teff = 4250K to Teff = 7000K in 250K intervals. We model the remotely detectable spectra of Earth-like planets for clear and cloudy atmospheres at the 1AU equivalent distance from the VIS to IR (0.4 {\\mu}m - 20 {\\mu}m) to compare detectability of features in different wavelength ranges in accordance with JWST and future design concepts to characterize exo-Earths. We also explore the effect of the stellar UV levels as well as spectral energy distribution on a terrestrial atmosphere concentrating on detectable atmospheric features that indicate habitability on Earth, namely: H2O, O3, CH4, N2O and CH3Cl. The increase in UV dominates changes of O3, OH, CH4, N2O and CH3Cl whereas the increase in stellar temperature dominates changes in H2O. The overall effect as stellar effective temperatures and corresponding UV increase, is a lower surface temperature of the planet du...

  8. Fermi-Einstein condensation in dense QCD-like theories

    E-Print Network [OSTI]

    Kurt Langfeld; Andreas Wipf

    2011-09-02T23:59:59.000Z

    While pure Yang-Mills theory feature the centre symmetry, this symmetry is explicitly broken by the presence of dynamical matter. We study the impact of the centre symmetry in such QCD-like theories. In the analytically solvable Schwinger model, centre transitions take place even under extreme conditions, temperature and/or density, and we show that they are key to the solution of the Silver-Blaze problem. We then develop an effective SU(3) quark model which confines quarks by virtue of centre sector transitions. The phase diagram by confinement is obtained as a function of the temperature and the chemical potential. We show that at low temperatures and intermediate values for the chemical potential the centre dressed quarks undergo condensation due to Bose like statistics. This is the Fermi Einstein condensation. To corroborate the existence of centre sector transitions in gauge theories with matter, we study (at vanishing chemical potential) the interface tension in the three-dimensional Z2 gauge theory with Ising matter, the distribution of the Polyakov line in the four-dimensional SU(2)-Higgs model and devise a new type of order parameter which is designed to detect centre sector transitions. Our analytical and numerical findings lead us to conjecture a new state of cold, but dense matter in the hadronic phase for which Fermi Einstein condensation is realised.

  9. Natural SUSY with a bino- or wino-like LSP

    E-Print Network [OSTI]

    Baer, Howard; Huang, Peisi; Mickelson, Dan; Padeffke-Kirkland, Maren; Tata, Xerxes

    2015-01-01T23:59:59.000Z

    In natural SUSY models higgsinos are always light because \\mu^2 cannot be much larger than M_Z^2, while squarks and gluinos may be very heavy. Unless gluinos are discovered at LHC13, the commonly assumed unification of gaugino mass parameters will imply correspondingly heavy winos and binos, resulting in a higgsino-like LSP and small inter-higgsino mass splittings. The small visible energy release in higgsino decays makes their pair production difficult to detect at the LHC. Relaxing gaugino mass universality allows for relatively light winos and binos without violating LHC gluino mass bounds and without affecting naturalness. In the case where the bino mass M_1mixed bino-higgsino LSP with instead sizable w_1-z_1 and z_2-z_1 mass gaps. The thermal neutralino abundance can match the measured dark matter density in contrast to models with a higgsino-like LSP where WIMPs (weakly interacting massive particles) are underproduced by factors of 10-15. If instead M_2<~ \\mu, then one o...

  10. Nanowires and Nanostructures That Grow Like Polymer Molecules

    SciTech Connect (OSTI)

    Shaw, Santosh [Iowa State University; Cademartiri, Ludovico [Ames Laboratory

    2013-09-20T23:59:59.000Z

    Unique properties (e.g., rubber elasticity, viscoelasticity, folding, reptation) determine the utility of polymer molecules and derive from their morphology (i.e., one-dimensional connectivity and large aspect ratios) and flexibility. Crystals do not display similar properties because they have smaller aspect ratios, they are rigid, and they are often too large and heavy to be colloidally stable. We argue, with the support of recent experimental studies, that these limitations are not fundamental and that they might be overcome by growth processes that mimic polymerization. Furthermore, we (i) discuss the similarities between crystallization and polymerization, (ii) critically review the existing experimental evidence of polymer-like growth kinetic and behavior in crystals and nanostructures, and (iii) propose heuristic guidelines for the synthesis of polymer-like crystals and assemblies. Understanding these anisotropic materials at the boundary between molecules and solids will determine whether we can confer the unique properties of polymer molecules to crystals, expanding them with topology, dynamics, and information and not just tuning them with size.

  11. Cosmological problems with multiple axion-like fields

    SciTech Connect (OSTI)

    Mack, Katherine J. [Kavli Institute for Cosmology, Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge, CB3 0HA (United Kingdom); Steinhardt, Paul J., E-mail: mack@ast.cam.ac.uk, E-mail: steinh@princeton.edu [Department of Physics, Princeton University, Jadwin Hall, Princeton, NJ 08544 (United States)

    2011-05-01T23:59:59.000Z

    Incorporating the QCD axion and simultaneously satisfying current constraints on the dark matter density and isocurvature fluctuations requires non-minimal fine-tuning of inflationary parameters or the axion misalignment angle (or both) for Peccei-Quinn symmetry-breaking scales f{sub a} > 10{sup 12} GeV. To gauge the degree of tuning in models with many axion-like fields at similar symmetry-breaking scales and masses, as may occur in string theoretic models that include a QCD axion, we introduce a figure of merit F that measures the fractional volume of allowed parameter space: the product of the slow roll parameter ? and each of the axion misalignment angles, ?{sub 0}. For a single axion, F?<10{sup ?11} is needed to avoid conflict with observations. We show that the fine tuning of F becomes exponentially more extreme in the case of numerous axion-like fields. Anthropic arguments are insufficient to explain the fine tuning because the bulk of the anthropically allowed parameter space is observationally ruled out by limits on the cosmic microwave background isocurvature modes. Therefore, this tuning presents a challenge to the compatibility of string-theoretic models with light axions and inflationary cosmology.

  12. Starobinsky-like inflation induced by f(T) gravity

    E-Print Network [OSTI]

    W. El Hanafy; G. L. Nashed

    2014-10-08T23:59:59.000Z

    We study a single fluid component in a flat like universe governed by $f(T)$ gravity theories. The flat like universe does not imply a vanishing sectional curvature $k$, but assuming a vanishing of the coefficient of $k$ in the modified Friedmann equations. This enables us to extract a compatible pair of a scale factor $a(t)$ and an inverse power series $f(T)$. The Equation of State (EoS) evolves similarly in all models $k=0, \\pm 1$. In large Hubble ($H$)-spacetime the theory is consistent with the inflationary universe scenario and respects the conservation principle. We study the case when the teleparallel torsion is made of a single scalar field. The theory produces Starobinsky model naturally at its zeroth order without using a conformal transformation. Higher order solutions continuously interpolate between Starobinsky and quadratic inflation models. The slow-roll analysis shows double solutions so that for a single value of the spectral index $n_{s}$ the theory can predict double tensor-to-scalar ratios $r$ of Planck and BICEP2 data.

  13. What Fraction of Sun-like Stars have Planets?

    E-Print Network [OSTI]

    Lineweaver, C H; Lineweaver, Charles H.; Grether, Daniel

    2003-01-01T23:59:59.000Z

    The radial velocities of ~1750 nearby Sun-like stars are currently being monitored by eight high-sensitivity Doppler exoplanet surveys. Approximately 90 of these stars have been found to host exoplanets massive enough to be detectable. Thus at least ~5% of target stars possess planets. If we limit our analysis to target stars that have been monitored the longest (~15 years), ~11% possess planets. If we limit our analysis to stars monitored the longest and whose low surface activity allow the most precise velocity measurements, ~25% possess planets. By identifying trends of the exoplanet mass and period distributions in a sub-sample of exoplanets less-biased by selection effects, and linearly extrapolating these trends into regions of parameter space that have not yet been completely sampled, we find at least ~9% of Sun-like stars have planets in the mass and orbital period ranges Msin(i) > 0.3 M_Jupiter and P 0.1 M_Jupiter and P < 60 years. Even this larger area of the mass-period plane is less than 20% o...

  14. Alignment of He-Like and H-Like P-States of 48-Mev Foil Excited mg Ions

    E-Print Network [OSTI]

    Palinkas, J.; Pedrazzini, G. J.; Church, David A.; Kenefick, R. A.; Fulton, C. A.; Watson, R. L.; Wang, D. W.

    1985-01-01T23:59:59.000Z

    PHYSICAL REVIEW A VOLUME 31, NUMBER 2 FEBRUARY 1985 Alignment of He- and H-like P states of 48-MeV foil-excited Mg ions J. Palinkas and G. J. Pedrazzini Cyclotron Institute, Texas Ac%M University, College Station, Texas 77843 D. A. Church and R... with known polarization, and it should be noted that synchrotron radiation presents interesting and useful possibilities in this regard. The determination of the reflectivity for unpolarized radiation is somewhat easier in the sense that it does...

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

    E-Print Network [OSTI]

    Mozhgan Mombeini

    2012-06-05T23:59:59.000Z

    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.

  16. Studies of Charmonium-Like States at BaBar

    SciTech Connect (OSTI)

    Mokhtar, Arafat Gabareen; /SLAC

    2012-04-09T23:59:59.000Z

    Several charmonium-like states above D{bar D} threshold have been discovered at the Belle and BABAR B-factories. Some of these states are produced via Initial State Radiation (e.g. Y(4260) and Y(4350)), and some are observed in B-meson decays (e.g. X(3872), and Y(3940)). The Belle observations of the enhancements in the {Psi}(2S){pi}{sup -} and {chi}{sub cl}{pi}{sup -}, i.e. the Z(4430){sup -}, Z{sub 1}(4050){sup -}, and Z{sub 2}(4250){sup -}, have generated a great deal of interest, because such states must have minimum quark content (c{bar c}d{bar u}), i.e. these are four-quark states. The BABAR Collaboration does not confirm the existence of the Z(4430){sup -}.

  17. 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.

    2003-06-03T23:59:59.000Z

    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.

  18. Modeling epoxy foams exposed to fire-like heat fluxes.

    SciTech Connect (OSTI)

    Hobbs, Michael L.

    2004-11-01T23:59:59.000Z

    A decomposition chemistry and heat transfer model to predict the response of removable epoxy foam (REF) exposed to fire-like heat fluxes is described. The epoxy foam was created using a perfluorohexane blowing agent with a surfactant. The model includes desorption of the blowing agent and surfactant, thermal degradation of the epoxy polymer, polymer fragment transport, and vapor-liquid equilibrium. An effective thermal conductivity model describes changes in thermal conductivity with reaction extent. Pressurization is modeled assuming: (1) no strain in the condensed-phase, (2) no resistance to gas-phase transport, (3) spatially uniform stress fields, and (4) no mass loss from the system due to venting. The model has been used to predict mass loss, pressure rise, and decomposition front locations for various small-scale and large-scale experiments performed by others. The framework of the model is suitable for polymeric foams with absorbed gases.

  19. Modeling epoxy foams exposed to fire-like heat fluxes.

    SciTech Connect (OSTI)

    Hobbs, Michael L.

    2004-10-01T23:59:59.000Z

    A decomposition chemistry and heat transfer model to predict the response of removable epoxy foam (REF) exposed to fire-like heat fluxes is described. The epoxy foam was created using a perfluorohexane blowing agent with a surfactant. The model includes desorption of the blowing agent and surfactant, thermal degradation of the epoxy polymer, polymer fragment transport, and vapor-liquid equilibrium. An effective thermal conductivity model describes changes in thermal conductivity with reaction extent. Pressurization is modeled assuming: (1) no strain in the condensed-phase, (2) no resistance to gas-phase transport, (3) spatially uniform stress fields, and (4) no mass loss from the system due to venting. The model has been used to predict mass loss, pressure rise, and decomposition front locations for various small-scale and large-scale experiments performed by others. The framework of the model is suitable for polymeric foams with absorbed gases.

  20. Doppler-like effect and doubtful expansion of universe

    E-Print Network [OSTI]

    Edward Szaraniec

    2003-10-01T23:59:59.000Z

    The distance contraction, as observed in electrical soundings over horizontally stratified earth (static system), is identified as a counterpart of Doppler shift in dynamical systems. Identification of Doppler-like effect in a stock-still systems makes it possible to give an al-ternative answer to the question about an effective cause of the Doppler shift, which sounds: the inhomogeneities. This answer opens different static as well as kinematic possibilities, which challenge established theories of expanding universe and energizing big bang.The energy propagating in stratified universe of layers exhibits a shift which could be at-tributed not only to the expansion (Hubble's theory) but alternatively to fluctuations in material properties (inhomogeneities).

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

    SciTech Connect (OSTI)

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

    1981-03-01T23:59:59.000Z

    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.

  2. Temperature of projectile like fragments in heavy ion collisions

    E-Print Network [OSTI]

    Gupta, S Das; Chaudhuri, G

    2013-01-01T23:59:59.000Z

    A model in which a projectile like fragment can be simply regarded as a remnant after removal of some part of the projectile leads to an excited fragment. This excitation energy can be calculated with a Hamiltonian that gives correct nuclear matter binding, compressibility and density distribution in finite nuclei. In heavy ion collisions the model produces a dependence of excitation energy on impact parameter which appears to be correct but the magnitude of the excitation energy falls short. It is argued that dynamic effects left out in the model will increase this magnitude. The model can be directly extended to include dynamics but at the expense of increased computation. For many calculations for observables, a temperature is an easier tool to use rather than an excitation energy. Hence temperature dependences on impact parameter in heavy ion collisions are displayed.

  3. Temperature of projectile like fragments in heavy ion collisions

    E-Print Network [OSTI]

    S. Das Gupta; S. Mallik; G. Chaudhuri

    2013-09-27T23:59:59.000Z

    A model in which a projectile like fragment can be simply regarded as a remnant after removal of some part of the projectile leads to an excited fragment. This excitation energy can be calculated with a Hamiltonian that gives correct nuclear matter binding, compressibility and density distribution in finite nuclei. In heavy ion collisions the model produces a dependence of excitation energy on impact parameter which appears to be correct but the magnitude of the excitation energy falls short. It is argued that dynamic effects left out in the model will increase this magnitude. The model can be directly extended to include dynamics but at the expense of increased computation. For many calculations for observables, a temperature is an easier tool to use rather than an excitation energy. Hence temperature dependences on impact parameter in heavy ion collisions are displayed.

  4. Modeling the surface temperature of Earth-like planets

    E-Print Network [OSTI]

    Vladilo, G; Murante, G; Filippi, L; Provenzale, A

    2015-01-01T23:59:59.000Z

    We introduce a novel Earth-like planet surface temperature model (ESTM) for habitability studies based on the spatial-temporal distribution of planetary surface temperatures. The ESTM adopts a surface Energy Balance Model complemented by: radiative-convective atmospheric column calculations, a set of physically-based parameterizations of meridional transport, and descriptions of surface and cloud properties more refined than in standard EBMs. The parameterization is valid for rotating terrestrial planets with shallow atmospheres and moderate values of axis obliquity (epsilon >= 45^o). Comparison with a 3D model of atmospheric dynamics from the literature shows that the equator-to-pole temperature differences predicted by the two models agree within ~5K when the rotation rate, insolation, surface pressure and planet radius are varied in the intervals 0.5 <= Omega/Omega_o <= 2, 0.75 <= S/S_o <= 1.25, 0.3 <= p/(1 bar) <= 10, and 0.5 <= R/R_o <= 2, respectively. The ESTM has an extremely l...

  5. Wavelet Analysis on Detecting Pulse-Like Earthquakes

    SciTech Connect (OSTI)

    Bosi, Anna; Mariano, Paolo Maria [DICeA, Univesrity of Florence, via Santa Marta 3, I-50139 Firenze (Italy); Mollaioli, Fabrizio [Dipartimento di Ingegneria Strutturale e Geotecnica, Universita di Roma 'La Sapienza' Via Gramsci 53, 00197 Roma (Italy)

    2008-07-08T23:59:59.000Z

    A quantitative approach for identifying pulse-like ground motions is proposed herein. It is based on the use of the wavelet transform which has the peculiarity to detect sudden jumps in time histories by separating the contributions of different levels of frequency. Moreover, it has the advantage of low computational cost. Three different wavelet-based signal processing procedures are considered here in order to detect large pulses in near-fault ground motions. The first one is based on the direct decomposition of velocity time histories in frequency level and has been exploited elsewhere in the scientific literature. The other two are introduced here and take into account energy and power spectra. It is shown that wavelet analysis of the energy allows one to put in evidence even pulses that can be hardly recognized in the analysis of velocity time-histories. The proposed procedure permits also to distinguish the various energy contributions in different frequency ranges. By analyzing the wavelet coefficients, in fact, it is possible to verify if the mechanical energy release rate associated with a certain earthquake is due to a few severe events or to a series of 'small' events. It is also possible to evidence the frequency contents of a specific pulse (let say the one with highest amount of energy and corresponding power), isolating its analysis from the rest of the ground motion.

  6. Energy Levels Of Hydrogen-Like Atomsand Fundamental Constants

    E-Print Network [OSTI]

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

    1994-03-27T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Lpez-Valdivia, R; Bertone, E; Chvez, M; de Miera, F Cruz-Saenz; Amazo-Gmez, E M

    2015-01-01T23:59:59.000Z

    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...

  8. Avalanche-like fluidization of an attractive dispersion

    E-Print Network [OSTI]

    Aika Kurokawa; Valrie Vidal; Kei Kurita; Thibaut Divoux; Sbastien Manneville

    2015-05-22T23:59:59.000Z

    We report on the transient dynamics of an attractive silica dispersion that displays strong physical aging. Extensive rheology coupled to ultrasonic velocimetry allows us to characterize the global stress response together with the local dynamics of the gel during shear startup experiments. In practice, after being rejuvenated by a preshear, the dispersion is left to age during a time $t_w$ before being submitted to a constant shear rate $\\dot \\gamma$. We investigate in detail the effects of both $t_w$ and $\\dot \\gamma$ on the fluidization dynamics and build a complete phase diagram of the gel behavior. At large enough shear rates, the gel is fully fluidized and flows homogeneously independently of its age. Under lower shear rates, the strong interplay between aging and shear rejuvenation leads, together with wall slip, to a more complex phenomenology. The gel may either display transient shear banding towards complete fluidization, or steady-state shear banding. In the former case, we unravel that the progressive fluidization occurs by successive steps that appear as peaks on the global stress relaxation signal. Flow imaging reveals that the shear band grows up to complete fluidization of the material by sudden avalanche-like events that are correlated to large peaks in the slip velocity at the moving wall. In the case of steady-state shear banding, we recover the classical scenario involving a critical shear rate $ \\dot \\gamma_c$ below which no homogeneous steady flow is possible. We show here that $\\dot \\gamma_c$ displays a nonlinear behavior with $t_w$. Our work paves the way for a thorough description of transient flows of weak attractive gels, and highlights the subtle interplay between shear, wall slip and aging that constitutes a major challenge in terms of modeling that has yet not been met.

  9. Electrons Move Like Light in Three-Dimensional Solid | U.S. DOE...

    Office of Science (SC) Website

    Electrons Move Like Light in Three-Dimensional Solid Tracking electronic motion in a graphene-like bulk material shows fast electrons in all dimensions. Print Text Size: A A A...

  10. SciTech Connect: A Distinct MaoC-like Enoyl-CoA Hydratase Architecture...

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

    A Distinct MaoC-like Enoyl-CoA Hydratase Architecture Mediates Cholesterol Catabolism in Mycobacterium tuberculosis Citation Details In-Document Search Title: A Distinct MaoC-like...

  11. 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 ...

  12. GammeV: Fermilab axion-like particle photon regeneration results

    SciTech Connect (OSTI)

    Wester, William; /Fermilab

    2008-09-01T23:59:59.000Z

    GammeV is an axion-like particle photon regeneration experiment conducted at Fermilab that employs the light shining through a wall technique. They obtain limits on the coupling of a photon to an axion-like particle that extend previous limits for both scalar and pseudoscalar axion-like particles in the milli-eV mass range. They are able to exclude the axion-like particle interpretation of the anomalous PVLAS 2006 result by more than 5 standard deviations.

  13. Blue Munk: Towards an Analysis of Causatives and the Like in Chinuk Wawa

    E-Print Network [OSTI]

    Larsen, Thomas W

    2002-01-01T23:59:59.000Z

    BLUE MUNK: TOWARDS AN ANALYSIS OF CAUSATIVES AND THE LIKE INpoetry songs Tom Larsen Blue munk: Towards an alanysis of

  14. Fractal-like tree networks reducing the thermal conductivity Boming Yu1,

    E-Print Network [OSTI]

    Li, Baowen

    Fractal-like tree networks reducing the thermal conductivity Boming Yu1, * and Baowen Li1,2 1 conductivity of composites with embedded self-similar H-shaped fractal-like tree networks is studied that the thermal conductivity of the H-shaped fractal-like tree networks does not obey Murray's law. The present

  15. Electromagnetism-like Mechanism with Force Decay Rate Great Deluge for the Course Timetabling Problem

    E-Print Network [OSTI]

    McCollum, Barry

    Electromagnetism-like Mechanism with Force Decay Rate Great Deluge for the Course Timetabling called Electromagnetism-like mechanism with force decay rate great deluge algorithm for university course on these benchmark problems. Keywords: Electromagnetism-like mechanism, force decay rate great deluge, course

  16. Rubber-like Exaggeration for Character Animation Ji-yong Kwon

    E-Print Network [OSTI]

    Lee, In-Kwon

    Rubber-like Exaggeration for Character Animation Ji-yong Kwon Yonsei University Seoul, Korea mage cartoon-style animation directly. We emulate the rubber-like exaggerations com- mon in traditional extend this technique to obtain smooth, rubber-like mo- tion by dividing the original links into shorter

  17. Ratchet-like motion of a shaken drop Xavier Noblin, Richard Kofman, and Franck Celestini

    E-Print Network [OSTI]

    Boyer, Edmond

    Ratchet-like motion of a shaken drop Xavier Noblin, Richard Kofman, and Franck Celestini the underlying mechanism leading to this ratchet-like motion of the drop. Our model includes the particular case do not provide the ratchet- like asymmetry necessary to induce a net drop displace- ment. Brunet et

  18. Edinburgh Research Explorer Plasmodium falciparum-like parasites infecting wild apes in

    E-Print Network [OSTI]

    Hall, Christopher

    Edinburgh Research Explorer Plasmodium falciparum-like parasites infecting wild apes in southern, Peeters, M, Sharp, PM, Bushman, FD & Hahn, BH 2013, 'Plasmodium falciparum-like parasites infecting wild claim. Download date: 28. Jun. 2014 #12;Plasmodium falciparum-like parasites infecting wild apes

  19. 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

  20. 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

    2014-01-01T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    2009-08-01T23:59:59.000Z

    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.

  2. 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

  3. New sub-family of lysozyme-like proteins shows no catalytic activity...

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

    modest sequence similarity to phage-like lysozyme (N-acetylmuramidase) but appears to lack essential catalytic residues that are strictly conserved in all lysozymes. Close...

  4. A Vitali-like Convergence Theorem For Generalized Analytic functions Sequence And Its Application

    E-Print Network [OSTI]

    Mingchun Xu

    2015-01-20T23:59:59.000Z

    In this paper, the Vitali-like convergence theorem is established. As its application we complete the proof of the Riemann Hypothesis.

  5. 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

  6. Eckol suppresses maintenance of stemness and malignancies in glioma stem-like cells

    SciTech Connect (OSTI)

    Hyun, Kyung-Hwan; Yoon, Chang-Hwan; Kim, Rae-Kwon; Lim, Eun-Jung [Department of Chemistry, Research Institute for Natural Sciences, Hanyang University, Seoul 133-791 (Korea, Republic of); An, Sungkwan [Functional Genoproteome Research Centre, Konkuk University, Seoul 143-701 (Korea, Republic of); Park, Myung-Jin [Division of Radiation Cancer Biology, Korea Institute of Radiological and Medical Sciences, Seoul 139-706 (Korea, Republic of); Hyun, Jin-Won [College of Medicine and Applied Radiological Science Research Institute, Jeju National University, Jeju-si 690-756 (Korea, Republic of); Suh, Yongjoon [Department of Chemistry, Research Institute for Natural Sciences, Hanyang University, Seoul 133-791 (Korea, Republic of); Kim, Min-Jung, E-mail: kimmj74@hanyang.ac.kr [Department of Chemistry, Research Institute for Natural Sciences, Hanyang University, Seoul 133-791 (Korea, Republic of); Lee, Su-Jae, E-mail: sj0420@hanyang.ac.kr [Department of Chemistry, Research Institute for Natural Sciences, Hanyang University, Seoul 133-791 (Korea, Republic of)

    2011-07-01T23:59:59.000Z

    A subpopulation of cancer cells with stem cell properties is responsible for tumor maintenance and progression, and may contribute to resistance to anticancer treatments. Thus, compounds that target cancer stem-like cells could be usefully applied to destroy cancer. In this study, we investigated the effect of Eckol, a phlorotannin compound, on stemness and malignancies in glioma stem-like cells. To determine whether Eckol targets glioma stem-like cells, we examined whether Eckol treatment could change the expression levels of glioma stem-like cell markers and self-renewal-related proteins as well as the sphere forming ability, and the sensitivity to anticancer treatments. Alterations in the malignant properties of sphere-derived cells by Eckol were also investigated by soft-agar colony forming assay, by xenograft assay in nude mice, and by cell invasion assay. Treatment of sphere-forming glioma cells with Eckol effectively decreased the sphere formation as well as the CD133{sup +} cell population. Eckol treatment suppressed expression of the glioma stem-like cell markers and the self-renewal-related proteins without cell death. Moreover, treatment of glioma stem-like cells with Eckol significantly attenuated anchorage-independent growth on soft agar and tumor formation in xenograft mice. Importantly, Eckol treatment effectively reduced the resistance of glioma stem-like cells to ionizing radiation and temozolomide. Treatment of glioma stem-like cells with Eckol markedly blocked both phosphoinositide 3-kinase-Akt and Ras-Raf-1-Erk signaling pathways. These results indicate that the natural phlorotannin Eckol suppresses stemness and malignancies in glioma stem-like cells, and thereby makes glioma stem-like cells more sensitive to anticancer treatments, providing novel therapeutic strategies targeting specifically cancer stem-like cells.

  7. Plasmon excitation by the Gaussian-like core mode of a photonic crystal

    E-Print Network [OSTI]

    Skorobogatiy, Maksim

    Plasmon excitation by the Gaussian-like core mode of a photonic crystal waveguide Maksim excitation of a plasmon by the Gaussian- like leaky mode of an effectively single mode photonic crystal (PC) waveguide. Plasmon is phase matched by design with a waveguide mode, and travels in a metallic layer

  8. 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

  9. 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

  10. Pencil-Like Sketch Rendering of 3D Scenes Using Trajectory Planning and Dynamic Tracking

    E-Print Network [OSTI]

    Kara, Levent Burak

    Pencil-Like Sketch Rendering of 3D Scenes Using Trajectory Planning and Dynamic Tracking Gnay non-photorealistic rendering method to render 3D scenes in the form of pencil-like sketches. This work then produces the rendered sketch, whose characteristics can be adjusted with a set of trajectory and tracking

  11. LOCAL UNIFIED MODELS OF BACKSCATTERING FROM OCEAN-LIKE SURFACES AT MODERATE INCIDENCE ANGLES

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    expanded up to the order two, like the SSA2 and LCA2. Electromagnetic scattering by rough surfaces, Random of the scattering matrix as SSA2, like the LCA2, were published by Elfouhaily et al. [10, 11]. It is well known is presented and tested for microwave frequencies and different wind speeds. The paper is organized as follows

  12. Carbonaceous species and humic like substances (HULIS) in Arctic snowpack during OASIS field campaign in Barrow

    E-Print Network [OSTI]

    Sheldon, Nathan D.

    Carbonaceous species and humic like substances (HULIS) in Arctic snowpack during OASIS field on snow albedo and arctic atmospheric chemistry. During the OASIS field campaign, in March and April 2009), Carbonaceous species and humic like substances (HULIS) in Arctic snowpack during OASIS field campaign in Barrow

  13. Delivering Heparin-Binding Insulin-Like Growth Factor 1 with Self-Assembling Peptide Hydrogels

    E-Print Network [OSTI]

    Miller, Rachel E.

    Heparin-binding insulin-like growth factor 1 (HB-IGF-1) is a fusion protein of IGF-1 with the HB domain of heparin-binding epidermal growth factor-like growth factor. A single dose of HB-IGF-1 has been shown to bind ...

  14. Electrical and optical properties of diamond-like carbon films deposited by pulsed laser ablation

    E-Print Network [OSTI]

    Bristol, University of

    films, which make them more useful than polycrystalline diamond films for many applications. For exampleElectrical and optical properties of diamond-like carbon films deposited by pulsed laser ablation K e i n f o Available online 11 March 2010 Keyword: Pulsed laser ablation Diamond-like carbon films

  15. Wavelets and wavelet-like transforms on the sphere and their application to geophysical data inversion

    E-Print Network [OSTI]

    Simons, Frederik J.

    Wavelets and wavelet-like transforms on the sphere and their application to geophysical data the Slepian basis, harmonic splines, wavelets and wavelet-like Slepian frames. In this paper we focus on the latter two: spherical wavelets developed for geophysical applications on the cubed sphere

  16. DENOMINATOR BOUNDS IN THOMPSON-LIKE GROUPS AND FLOWS DANNY CALEGARI

    E-Print Network [OSTI]

    McReynolds, Ben

    DENOMINATOR BOUNDS IN THOMPSON-LIKE GROUPS AND FLOWS DANNY CALEGARI ABSTRACT. Let T denote Thompson Thompson-like. We also obtain an explicit upper bound on the smallest period of a fixed point in terms and Sergiescu studied Thompson's group T of homeomorphisms of the circle from a number of points of view

  17. ANALYSIS OF THE REQUIREMENTS FOR HUMAN TOLL-LIKE RECEPTOR 3 DOMINANT NEGATIVITY AND SIGNAL TRANSDUCTION

    E-Print Network [OSTI]

    Hickey, Matthew

    2009-06-09T23:59:59.000Z

    Toll-like receptors are an important part of the innate immune system and mediate infection via the recognition of pathogen-associated molecular patterns (PAMPs). Toll-like receptor 3 (TLR3) recognizes foreign-derived double stranded RNA as its...

  18. Fine structure of helium and light helium-like ions Krzysztof Pachucki and Vladimir A. Yerokhin

    E-Print Network [OSTI]

    Pachucki, Krzysztof

    1 Fine structure of helium and light helium-like ions Krzysztof Pachucki and Vladimir A. Yerokhin Abstract: Calculational results are presented for the fine-structure splitting of the 23 P state of helium and helium-like ions with the nuclear charge Z up to 10. Theoretical predictions are in agreement

  19. A novel "Kabuto-like" nickel catalyst forms bioactive frameworks from low-cost phenol derivatives

    E-Print Network [OSTI]

    Takahashi, Ryo

    1 A novel "Kabuto-like" nickel catalyst forms bioactive developed a new nickel catalyst with a "Kabuto-like" structure that was found to catalyze the cross nickel catalyst to catalyze the cross-coupling reaction between carbonyl compounds and phenol derivatives

  20. Searching for axion-like-particles in the sky C. Burragea

    E-Print Network [OSTI]

    1 Searching for axion-like-particles in the sky C. Burragea a Theory Group, Deutsches Elektronen it behaves as an Axion-Like-Particle (ALP). ALPs mix with photons in the presence of magnetic fields of a coupling between the scalar field and photons. Fields with such couplings are generically known as Axion

  1. Decoding Turbo-Like Codes via Linear Programming Jon Feldman David R. Karger

    E-Print Network [OSTI]

    Decoding Turbo-Like Codes via Linear Programming Jon Feldman David R. Karger MIT Laboratory algorithm for decoding turbo-like codes based on linear programming. We prove that for the case of Repeat is the path corresponding to the original transmitted code word. 1 Introduction The introduction of turbo

  2. 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

  3. Logo-like Learning of Basic Concepts of Algorithms -Having Fun with Algorithms

    E-Print Network [OSTI]

    Logo-like Learning of Basic Concepts of Algorithms - Having Fun with Algorithms Gerald Futschek are not primarily interested in programming the way of learning is highly influenced by the Logo style of learning to design efficient algorithms. Keywords Logo-like learning, algorithms, group learning 1 2 3 4 5 n ... 1

  4. The Mechatonic Design of a Human-like Robot Head Karsten Berns1

    E-Print Network [OSTI]

    Berns, Karsten

    The Mechatonic Design of a Human-like Robot Head Karsten Berns1 Carsten Hillenbrand1 and Krzystof. In this paper the design concept as well as the constructed human-like robot head is introduced. Main goal of the head design is the support of an adequate human machine interaction. Therefore, our robots head should

  5. Energy levels and radiative rates for transitions in B-like to F-like Kr ions (Kr XXXII-XXVIII)

    SciTech Connect (OSTI)

    Aggarwal, K.M. [Astrophysics Research Centre, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, Northern Ireland (United Kingdom)], E-mail: K.Aggarwal@qub.ac.uk; Keenan, F.P. [Astrophysics Research Centre, School of Mathematics and Physics, Queen's University, Belfast BT7 1NN, Northern Ireland (United Kingdom); Lawson, K.D. [EURATOM/UKAEA Fusion Association, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB (United Kingdom)

    2008-05-15T23:59:59.000Z

    Energy levels, radiative rates, oscillator strengths, line strengths, and lifetimes have been calculated for transitions in B-like to F-like Kr ions, Kr XXXIII-XXVIII. For the calculations, the fully relativistic GRASP code has been adopted, and results are reported for all electric dipole (E1), electric quadrupole (E2), magnetic dipole (M1), and magnetic quadrupole (M2) transitions among the lowest 125, 236, 272, 226, and 113 levels of Kr XXXII, Kr XXXI, Kr XXX, Kr XXIX, and Kr XXVIII, respectively, belonging to the n {<=} 3 configurations. Comparisons are made with earlier available theoretical and experimental results, and some discrepancies have been noted and explained.

  6. Structural evolution of the P22-like phages: Comparison of Sf6 and P22 procapsid and virion architectures

    E-Print Network [OSTI]

    Baker, Timothy S.

    Structural evolution of the P22-like phages: Comparison of Sf6 and P22 procapsid and virion Keywords: cryoEM Image reconstruction Bacteriophage Sf6 Virus assembly Procapsid Virion Coat proteins chaperones), these phages are classified into three groups (P22-like, Sf6-like, and CUS-3-like). We used cryo

  7. 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)

    2002-01-01T23:59:59.000Z

    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.

  8. 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

    2011-02-08T23:59:59.000Z

    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

  9. 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...

  10. 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...

  11. Experimental visualization of the near-boundary hydrodynamics about fish-like swimming bodies

    E-Print Network [OSTI]

    Techet, Alexandra Hughes

    2001-01-01T23:59:59.000Z

    This thesis takes a look at the near boundary flow about fish-like swimming bodies. Experiments were performed up to Reynolds number 106 using laser Doppler velocimetry and particle imaging techniques. The turbulence in ...

  12. 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

  13. A Framework like a tool for specify motivating Collaborative Learning Participatory Simulations

    E-Print Network [OSTI]

    Antunes, Pedro

    1 A Framework like a tool for specify motivating Collaborative Learning Participatory Simulations that collaborative participatory simulations improve teaching and learning, increasing motivation inside. Keywords: Handhelds. Gestures, Sketches. Collaborative Learning. Participatory Simulation. 1. Introduction

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

    E-Print Network [OSTI]

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

    2003-02-28T23:59:59.000Z

    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.

  15. analysing solar-like oscillating: Topics by E-print Network

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

    in delta Sct stars extends only about 1 per cent of the radius, but with sufficient energy to excite solar-like oscillations. This was not observed before the Kepler mission,...

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

    E-Print Network [OSTI]

    Wei Liao

    2011-07-19T23:59:59.000Z

    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.

  17. Detection of NonSymmetrical Damage in Smart PlateLike Structures 1

    E-Print Network [OSTI]

    and compared to experimental data obtained from tests on cantilever aluminum plate­like structures damaged such as the aerospace, automotive and machine­tool industries. In particular, smart structures with self actuating

  18. New Agonists / Antagonists for Toll-like Receptors (TLR7 and TLR9)

    E-Print Network [OSTI]

    , proteins, nucleic ac- ids, and the like. TLR-receptors activate the innate and, in certain cases, also the immune system is up-regulated despite the lack of ,,foreign" signal, as is the case in most au- toimmune

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

    E-Print Network [OSTI]

    Sangkhanate, Assanee

    2012-06-26T23:59:59.000Z

    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, ...

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

    E-Print Network [OSTI]

    Agaiby, Shehab Sherif Wissa

    2013-01-01T23:59:59.000Z

    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 ...

  1. Increased levels of ligands of Toll-like receptors 2 and 4 in type 1 diabetes

    E-Print Network [OSTI]

    Devaraj, S.; Dasu, M. R.; Park, S. H.; Jialal, I.

    2009-01-01T23:59:59.000Z

    like receptors by insulin. Diabetes Care 31:18271831 10.in obesity and type 2 diabetes. Am J Physiol Endocrinollike receptors 2 and 4 in type 1 diabetes S. Devaraj & M. R.

  2. Tail universalities in rank distributions as an algebraic problem: the beta-like function

    E-Print Network [OSTI]

    Gerardo G. Naumis; Germinal Cocho

    2007-05-04T23:59:59.000Z

    Although power laws of the Zipf type have been used by many workers to fit rank distributions in different fields like in economy, geophysics, genetics, soft-matter, networks etc., these fits usually fail at the tails. Some distributions have been proposed to solve the problem, but unfortunately they do not fit at the same time both ending tails. We show that many different data in rank laws, like in granular materials, codons, author impact in scientific journal, etc. are very well fitted by a beta-like function. Then we propose that such universality is due to the fact that a system made from many subsystems or choices, imply stretched exponential frequency-rank functions which qualitatively and quantitatively can be fitted with the proposed beta-like function distribution in the limit of many random variables. We prove this by transforming the problem into an algebraic one: finding the rank of successive products of a given set of numbers.

  3. Computational studies on the factors influencing stabilities of collagen-like peptides

    E-Print Network [OSTI]

    Chang, Nai-yuan, 1973-

    2004-01-01T23:59:59.000Z

    In this study, thermodynamic integration and molecular dynamics methods were used to elucidate the factors affecting stabilities of collagen-like peptides. We proposed to investigate three specific aspects: (1) the stabilizing ...

  4. Particular Solutions If the differential equation is actually modeling something (like the

    E-Print Network [OSTI]

    Thomases, Becca

    of milk as a function of time) it is likely that you will know a specific value (like the fact that milk = ln 3320.12 1000 10 = 0.12 So A(t) = 1000e0.12t #12;Newton's Law of Cooling Newton's law of cooling is the rate of cooling and t is time. Since the object is going from higher temperature to cooler temperature

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

    E-Print Network [OSTI]

    Yerokhin, V A; Fritzsche, S

    2014-01-01T23:59:59.000Z

    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.

  6. (j,0) {circle_plus} (0,j) representation space: Majorana-like construct

    SciTech Connect (OSTI)

    Ahluwalia, D.V.; Goldman, T.; Johnson, M.B.

    1993-12-31T23:59:59.000Z

    This is second of the two invited lectures presented at the ``XVII International School of Theoretical Physics: Standard Model and Beyond` 93.`` The text is essentially based on a recent publication by the present authors. Here, after briefly reviewing the (j, 0) {circle_plus} (0, j) Dirac-like construct in the front form, we present a detailed construction of the (j, 0) {circle_plus} (0, j) Majorana-like fields.

  7. New Atomic probes for Dark Matter detection: Axions, Axion-like particles and Topological Defects

    E-Print Network [OSTI]

    Yevgeny V. Stadnik; Victor V. Flambaum

    2014-09-10T23:59:59.000Z

    We present a brief overview of recently proposed detection schemes for axion, axion-like pseudoscalar particle and topological defect dark matter. We focus mainly on the possibility of using atomic and molecular systems for dark matter detection. For axions and axion-like particles, these methods are complementary probes to ongoing photon-axion interconversion experiments and astrophysical observations. For topological defects, these methods are complementary to conventional astrophysical search schemes based on gravitational signatures.

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

    DOE Patents [OSTI]

    Yang, Zhenbiao; Karr, Stephen

    2014-02-11T23:59:59.000Z

    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.

  9. High resolution n = 3 to n = 2 spectra of neon-like silver

    SciTech Connect (OSTI)

    Beiersdorfer, P.; Bitter, M.; von Goeler, S.; Cohen, S.; Hill, K.W.; Timberlake, J.; Walling, R.S.; Chen, M.H.; Hagelstein, P.L.; Scofield, J.H.

    1986-04-01T23:59:59.000Z

    Spectra of the n = 3 to n = 2 transitions in neon-like silver emitted from the Princeton Large Torus have been recorded with a high-resolution Bragg-crystal spectrometer. The measurements cover the wavelength region 3.3 to 4.1 A and include the forbidden 3p ..-->.. 2p electric quadrupole lines. Transitions in the adjacent sodium-like, and aluminum-like charge states of silver have also been observed and identified. The Ly-..cap alpha.. spectra of hydrogen-like argon and iron, the K..cap alpha.. spectra of helium-like argon, potassium, manganese, and iron, and the K..beta.. spectrum of helium-like argon fall in the same wavelength region in first or second order and have been measured concurrently. These spectra provide a coherent set of wavelength reference data obtained with the same spectrometer and from the same tokamak. This set is used as a basis to compare wavelength predictions for one- and two-electron systems to each other and to determine the transition energies of the silver lines with great accuracy.

  10. Yes, I would like to sign up for Finance Committee on: _____/_____/2014 (Please print clearly and legibly)

    E-Print Network [OSTI]

    de Lijser, Peter

    Yes, I would like to sign up for Finance Committee on: _____/_____/2014 (Please print clearly Name from AICA Leadership/Advisor Yes, I would like to sign up for Finance Committee on

  11. 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). ...

  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)

    2010-11-23T23:59:59.000Z

    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. Silica-Like Sequence of Anomalies in Core-Softened Systems

    E-Print Network [OSTI]

    Yu. D. Fomin; E. N. Tsiok; V. N. Ryzhov

    2013-01-17T23:59:59.000Z

    In this paper we present a simulation study of density, structural and diffusion anomalies in core-softened system introduced in our previous publications. It is well-known, that with appropriate parametrization, core-softened systems are remarkable model liquids that exhibit anomalous properties observed in tetrahedral liquids such as silica and water. It is widely believed that core-softened potentials demonstrate the water-like sequence of anomalies. We show that with increasing the depth of the attractive part of the potential the order of the region of anomalous diffusion and the regions of density and structural anomalies is inverted and have the silica-like sequence. We also show that the slope of the Widom line is negative like in water.

  14. Analysis of Rotating Collectors from the Private Region of JET with Carbon Wall and Metallic ITER-Like Wall

    E-Print Network [OSTI]

    Analysis of Rotating Collectors from the Private Region of JET with Carbon Wall and Metallic ITER-Like Wall

  15. Coupling between JET Pedestal ne-Te and Outer Target Plate Recycling: Consequences for JET ITER-Like-Wall Operation

    E-Print Network [OSTI]

    Coupling between JET Pedestal ne-Te and Outer Target Plate Recycling: Consequences for JET ITER-Like-Wall Operation

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

    E-Print Network [OSTI]

    Tom Greene; Colin Aspin; Bo Reipurth

    2008-01-27T23:59:59.000Z

    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.

  17. A novel route for the synthesis of nanotubes and fullerene-like nanostructures of molybdenum disulfide

    SciTech Connect (OSTI)

    Panigrahi, Pravas Kumar, E-mail: pravas.iit@gmail.com [Department of Chemistry, Indian Institute of Technology, Kharagpur 721302 (India); Pathak, Amita, E-mail: ami@chem.iitkgp.ernet.in [Department of Chemistry, Indian Institute of Technology, Kharagpur 721302 (India)] [Department of Chemistry, Indian Institute of Technology, Kharagpur 721302 (India)

    2011-12-15T23:59:59.000Z

    Graphical abstract: Nanotubes and fullerene-like nanostructures of MoS{sub 2} were synthesized via a microwave-assisted route in solution phase. Highlights: Black-Right-Pointing-Pointer Microwave-assisted route for synthesis of nanotube and fullerene-like nanostructures of MoS{sub 2}. Black-Right-Pointing-Pointer Morphological analysis of the synthesized products. Black-Right-Pointing-Pointer Solvent plays important role in the modification of morphology of MoS{sub 2}. -- Abstract: The paper described the synthesis of nanotubes and fullerene-like nanostructures of MoS{sub 2} through a technically simple, rapid, and energy-efficient microwave-assisted synthesis technique, which involved the use of elemental sulfur dissolved in a mixture of monoethanolamine and hydrazine hydrate as the sulfide source. The microwave induced reaction between the molybdate with sulfide ions, in the presence of hydrazine hydrate in the reaction medium, resulted in the formation of gray colored powders of amorphous MoS{sub 2}. The as-obtained powders were calcined at 600 Degree-Sign C for 2 h and characterized by different techniques. HRTEM analysis of the calcined samples indicated the formation of fullerene-like MoS{sub 2} structures when the starting solution mixture was irradiated with microwave for a period of 200 s, while on 600 s of irradiation of the same revealed the formation of folded sheets like MoS{sub 2} nanotubes. BET surface areas of the calcined samples have been measured and a plausible reaction mechanism for the formation of nanotubes and fullerene-like nanostructures of MoS{sub 2} has been proposed.

  18. Collective multipole-like signatures of entanglement in symmetric N-qubit systems

    E-Print Network [OSTI]

    A. R. Usha Devi; R. Prabhu; A. K. Rajagopal

    2007-06-22T23:59:59.000Z

    A cogent theory of collective multipole-like quantum correlations in symmetric multiqubit states is presented by employing SO(3) irreducible spherical tensor representation. An arbitrary bipartite division of this system leads to a family of inequalities to detect entanglement involving averages of these tensors expressed in terms of the total system angular momentum operator. Implications of this theory to the quantum nature of multipole-like correlations of all orders in the Dicke states are deduced. A selected set of examples illustrate these collective tests. Such tests detect entanglement in macroscopic atomic ensembles, where individual atoms are not accessible.

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

    SciTech Connect (OSTI)

    Taniguchi, Tomohiro; Tsunegi, Sumito; Kubota, Hitoshi; Imamura, Hiroshi [National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba 305-8568 (Japan)

    2014-04-14T23:59:59.000Z

    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. Phantom-like behavior of a DGP-inspired Scalar-Gauss-Bonnet gravity

    SciTech Connect (OSTI)

    Nozari, Kourosh; Azizi, Tahereh [Department of Physics, Faculty of Basic Sciences, University of Mazandaran, P.O. Box 47416-95447, Babolsar (Iran, Islamic Republic of); Setare, M.R., E-mail: knozari@umz.ac.ir, E-mail: t.azizi@umz.ac.ir, E-mail: rezakord@ipm.ir [Faculty of Science, Department of Physics, University of Kurdistan, Pasdaran Ave., Sanandaj (Iran, Islamic Republic of)

    2009-10-01T23:59:59.000Z

    We study the phantom-like behavior of a DGP-inspired braneworld scenario where curvature correction on the brane is taken into account. We include a possible modification of the induced gravity on the brane by incorporating higher order curvature terms of Gauss-Bonnet type. We investigate the cosmological implications of the model and we show that the normal branch of the scenario self-accelerates in this modified scenario without introducing any dark energy component. Also, a phantom-like behavior can be realized in this model without introducing any phantom field that suffers from serious difficulties such as violation of the null energy condition.

  1. 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

    2006-07-06T23:59:59.000Z

    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.

  2. 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), different Ca-species such as calcite, aragonite-like CaCO3, and Ca adsorbed on extracellular polymers were of the amorphous aragonite-like CaCO3 was found to take place within the tightly bound extracellular polymeric

  3. Fast evaluation of the fatigue lifetime of rubber-like materials based on a heat build-up protocol and

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    Fast evaluation of the fatigue lifetime of rubber-like materials based on a heat build-up protocol Cedex, France Abstract The temperature of rubber-like materials increases under cyclic loadings, due results. Key words: rubber-like materials, heat build-up, infrared thermography, X-ray micro

  4. Coding Theorems for "Turbo-Like" Codes Dariush Divsalar, Hui Jin, and Robert J. McEliece

    E-Print Network [OSTI]

    Abu-Mostafa, Yaser S.

    Coding Theorems for "Turbo-Like" Codes Dariush Divsalar, Hui Jin, and Robert J. McEliece Jet call these systems "turbo-like" codes and they include as special cases both the classical turbo codes for turbo-like codes. 1. Introduction. The 1993 discovery of turbo codes by Berrou, Glavieux

  5. yale school of forestry & environmental studies What Do Healthy Rural Economies Look Like

    E-Print Network [OSTI]

    Haller, Gary L.

    yale school of forestry & environmental studies What Do Healthy Rural Economies Look Like in the U at the Yale School of Forestry & Environmental Studies Publication Series website: www.yale.edu/environment/publications © 2013 Yale School of Forestry & Environmental Studies. This report may be reproduced without written

  6. Parallel Scan-Like Testing and Fault Diagnosis Techniques for Digital Microfluidic Biochips*

    E-Print Network [OSTI]

    Chakrabarty, Krishnendu

    Parallel Scan-Like Testing and Fault Diagnosis Techniques for Digital Microfluidic Biochips* Tao Xu, USA {tx, krish}@ee.duke.edu Abstract Dependability is an important attribute for microfluidic biochips diagnosis method based on test outcomes, for droplet-based microfluidic devices. The proposed method allows

  7. Virtual MISO Triggers in WiFi-like Networks Oscar Bejarano and Edward W. Knightly

    E-Print Network [OSTI]

    Knightly, Edward W.

    Virtual MISO Triggers in WiFi-like Networks Oscar Bejarano and Edward W. Knightly ECE Department, Rice University, Houston, TX 77005 Technical Report Abstract--Virtual Multiple-Input Single-Output (vMISO) sys- tems distribute multi-antenna diversity capabilities between a sending and a cooperating node. vMISO

  8. Virtual MISO Triggers in Wi-Fi-like Networks Oscar Bejarano and Edward W. Knightly

    E-Print Network [OSTI]

    Knightly, Edward W.

    Virtual MISO Triggers in Wi-Fi-like Networks Oscar Bejarano and Edward W. Knightly ECE Department-Input Single-Output (vMISO) sys- tems distribute multi-antenna diversity capabilities between a sending and a cooperating node. vMISO has the potential to vastly improve wireless link reliability and bit error rates

  9. Dense granular ows: two-particle argument accounts for friction-like constitutive law with threshold

    E-Print Network [OSTI]

    Recanati, Catherine

    robust scaling behav- iors in various ow geomerties for dry grains, whether frictional or not [2, 4Dense granular ows: two-particle argument accounts for friction-like constitutive law a constitutive law that exhibits a ow threshold expressed as a #12;nite e#11;ective friction at ow onset

  10. Dense granular flows: two-particle argument accounts for friction-like constitutive law with threshold

    E-Print Network [OSTI]

    Boyer, Edmond

    Dense granular flows: two-particle argument accounts for friction-like constitutive law that exhibits a flow threshold expressed as a finite effective friction at flow onset. The value 83.10.Gr 83.60.La I. INTRODUCTION Dense flows of dry granular materials and granular pastes is still

  11. Combining Kalman Filtering and Markov Localization in NetworkLike Environments

    E-Print Network [OSTI]

    Thibaux, Sylvie

    Combining Kalman Filtering and Markov Localization in NetworkLike Environments Sylvie Thi and robustness of Markov localization with the accuracy and efficiency of Kalman filtering. This is achieved by letting Markov localization handle the topological aspects of the problem, and Kalman filtering the metric

  12. Modeling of Plate-Like Precipitates in Aluminum Alloys--Comparison between Phase Field and Cellular

    E-Print Network [OSTI]

    Chen, Long-Qing

    Modeling of Plate-Like Precipitates in Aluminum Alloys--Comparison between Phase Field and Cellular artificial ageing of aluminum alloys: the phase field and the cellular automaton methods. Although both and computationally effective for the application of precipitation modeling. Keywords Aluminum alloys, Cellular

  13. 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

  14. `LOW TEMPERATURE FOMBLIN' COATED ACCORDION-LIKE UCN STORAGE SYSTEM FOR NEUTRON LIFETIME EXPERIMENT

    E-Print Network [OSTI]

    Steyerl, Albert

    Island, Kingston, RI, USA; 3 Joint Institute for Nuclear Research, Dubna, Russia; 4 Institut Laue Temperature Fomblin', has been tested as a wall coating in an ultracold neutron (UCN) storage experiment using to n is made more reliable by the novel use of an accordion-like storage vessel. In this system

  15. Estimated number of women likely to benefit from bone mineral density measurement in France

    E-Print Network [OSTI]

    Paris-Sud XI, Universit de

    ; Menopause Introduction The prevalence of osteoporosis is rising, most notably in postmenopausal women years of age with risk factors for osteoporosis likely to lead to bone mineral density measurement, an investigation reimbursed by the French national health insurance system in patients at risk for osteoporosis

  16. 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

  17. LIKELY MEMBERS OF THE {beta} PICTORIS AND AB DORADUS MOVING GROUPS IN THE NORTH

    SciTech Connect (OSTI)

    Schlieder, Joshua E. [Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, D-69117 Heidelberg (Germany); Lepine, Sebastien [Department of Astrophysics, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024 (United States); Simon, Michal, E-mail: schlieder@mpia-hd.mpg.de, E-mail: michal.simon@stonybrook.edu, E-mail: lepine@amnh.org [Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794 (United States)

    2012-10-01T23:59:59.000Z

    We present first results from follow-up of targets in the northern hemisphere {beta} Pictoris and AB Doradus moving group candidate list of Schlieder et al. We obtained high-resolution, near-infrared spectra of 27 candidate members to measure their radial velocities and confirm consistent group kinematics. We identify 15 candidates with consistent predicted and measured radial velocities, perform analyses of their six-dimensional (UVWXYZ) Galactic kinematics, and compare to known group member distributions. Based on these analyses, we propose that seven {beta} Pic and eight AB Dor candidates are likely new group members. Four of the likely new {beta} Pic stars are binaries, one a double-lined spectroscopic system. Three of the proposed AB Dor stars are binaries. Counting all binary components, we propose 22 likely members of these young, moving groups. The majority of the proposed members are M2 to M5 dwarfs, the earliest being of type K2. We also present preliminary parameters for the two new spectroscopic binaries identified in the data, the proposed {beta} Pic member and a rejected {beta} Pic candidate. Our candidate selection and follow-up has thus far identified more than 40 low-mass, likely members of these two moving groups. These stars provide a new sample of nearby, young targets for studies of local star formation, disks and exoplanets via direct imaging, and astrophysics in the low-mass regime.

  18. How common are dot-like distributions? Taxonomical oversplitting in western European Agrodiaetus

    E-Print Network [OSTI]

    Pierce, Naomi E.

    How common are dot-like distributions? Taxonomical oversplitting in western European Agrodiaetusbij_1481 130..154 Approximately 50 taxa of butterflies in Western Europe have been described as new, the Balkan Peninsula and Crimea, or to small Mediterranean islands (Kudrna, 2002). Usually, these dot

  19. Arctic sea ice velocity field: General circulation and turbulent-like fluctuations

    E-Print Network [OSTI]

    Boyer, Edmond

    Arctic sea ice velocity field: General circulation and turbulent-like fluctuations P. Rampal,1,2 J the Arctic sea ice velocity field as the superposition of a mean field and fluctuations. We study how subtracting the mean field, are analyzed in terms of diffusion properties. Although the Arctic sea ice cover

  20. A Viterbi-like algorithm and EM learning for statistical abduction Taisuke SATO Yoshitaka KAMEYA

    E-Print Network [OSTI]

    Sato, Taisuke

    A Viterbi-like algorithm and EM learning for statistical abduction Taisuke SATO Yoshitaka KAMEYA@mi.cs.titech.ac.jp Abstract We propose statistical abduction as a #12;rst- order logical framework for representing and learning probabilistic knowledge. It com- bines logical abduction with a parameter- ized distribution over

  1. Toolkit for Teaching Steering Behaviors for 3D Human-like Virtual Agents (Demonstration)

    E-Print Network [OSTI]

    Brom, Cyril

    of steering behaviors for Pogamut toolkit for developing control mechanisms of virtual agents. The second one]: Model Development General Terms Algorithms Keywords Steering behaviors, Human-like virtual agents behavior shows that steering behaviors may not only control low-level navigation, but they may also be used

  2. Inorganica Chimica Acta 332 (2002) 127134 Bimetallic sheet and 3D threefold interpenetrating diamond-like

    E-Print Network [OSTI]

    Gao, Song

    2002-01-01T23:59:59.000Z

    interpenetrating dia- mond [13], a-polonium networks [16,17], other compli- cated 3D networks [18,22]. It has been found that the network topology of anionic coor- dination polymers like M(dca)3 - and M(dca)4 on that heterometallic networks can be built by further coordination bonding of the anionic dca coordi- nation polymer

  3. 20 EINSTEIN : SPRING/SUMMER 2013 Major victories are likely as Einstein researchers

    E-Print Network [OSTI]

    Yates, Andrew

    20 EINSTEIN : SPRING/SUMMER 2013 Major victories are likely as Einstein researchers attack 1921 and has proven notoriously inconsistent in protecting against TB. At Einstein, home to one teams of Einstein scientists are working on novel TB vaccines that may one day replace the BCG vac- cine

  4. Electrochemical CO2 and CO Reduction on Metal-Functionalized Porphyrin-like Graphene

    E-Print Network [OSTI]

    Thygesen, Kristian

    Electrochemical CO2 and CO Reduction on Metal-Functionalized Porphyrin-like Graphene Vladimir-functionalized graphene structures have been investigated as possible catalysts for CO2 and CO reduction to methane to this problem is to reduce CO instead of CO2. Volcano plots were constructed on the basis of scaling relations

  5. 2005 Nature Publishing Group Mammal-like muscles power swimming in a

    E-Print Network [OSTI]

    DeWitt, Thomas J.

    dorsal fin, where the RM is most abundant, showed that all sharks had a core temperature about 1820 8C 2005 Nature Publishing Group Mammal-like muscles power swimming in a cold-water shark Diego, within the fishes the tunas and lamnid sharks deviate from the ectothermic strategy, maintaining elevated

  6. 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 will also lead to additional ethanol use. There- fore, it is important to understand how ethanol affects that the presence of ethanol could have undesirable effects on the biodegradation of BTEX (i.e., benzene, toluene

  7. Phylogeography of pipistrelle-like bats within the Canary Islands, based on mtDNA sequences

    E-Print Network [OSTI]

    Brown, Richard

    Phylogeography of pipistrelle-like bats within the Canary Islands, based on mtDNA sequences J January 2002; received in revised form 7 July 2002 Abstract Evolution of three Canary Island by comparison of 1 kbp of mtDNA (from cytochrome b and 16S rRNA genes) between islands. mtDNA reveals that both

  8. Wavelet Denoising of Chirp-Like Signals in the Fourier Domain

    E-Print Network [OSTI]

    Harris, John G.

    Wavelet Denoising of Chirp-Like Signals in the Fourier Domain Liping Deng and John G. Harris- Wavelet shrinkage is a simple yet powerful tool for denoising piecewise smooth signals. In this paper we conventional wavelet shrinkage. Then, we obtain the resulting time domain signal with the inverse Fourier

  9. 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

  10. Synthesis of graphene-like nanosheets and their hydrogen adsorption capacity

    E-Print Network [OSTI]

    synthesized by the reduction of a colloidal suspen- sion of exfoliated graphite oxide. The morphology exfoliated natural graphite oxide (GO). After reduction this material consists of agglomerated and wrin- kled-like nanosheets by chemically reducing exfoliated graphite oxide, and investigated the hydrogen adsorption

  11. Distributed 3D Navigation and Collision Avoidance for Nonholonomic Aircraft-like Vehicles

    E-Print Network [OSTI]

    Dimarogonas, Dimos

    Vehicles (AUVs) and Unmanned Aerial Vehicles (UAVs), or automated Air Traffic Control (ATC) in general, Massachusetts Institute of Technology, Cambridge, MA, U.S.A. ddimar@mit.edu underwater vehicles, the aboveDistributed 3D Navigation and Collision Avoidance for Nonholonomic Aircraft-like Vehicles Giannis P

  12. 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

    2003-11-22T23:59:59.000Z

    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.

  13. 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

  14. H2S Induces a Suspended AnimationLike State in Mice

    E-Print Network [OSTI]

    Storey, Kenneth B.

    H2S Induces a Suspended AnimationLike State in Mice Eric Blackstone,1,2 Mike Morrison,2 Mark B sulfide (H2S) is a specific, potent, and reversible inhibitor of complex IV (cytochrome c oxidase and CBT in mammals. When mice were exposed to 80 ppm of H2S, their oxygen (O2) consumption dropped by 50

  15. Synthesis and characterization of flower-like {beta}-Ni(OH){sub 2} nanoarchitectures

    SciTech Connect (OSTI)

    Luo Yuanyuan [Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials, Nanotechnology Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China); Duan Guotao [Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials, Nanotechnology Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China); Li Guanghai [Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials, Nanotechnology Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 (China)], E-mail: ghli@issp.ac.cn

    2007-07-15T23:59:59.000Z

    Flower-like Ni(OH){sub 2} nanoarchitectures have been synthesized through a one-step mild hydrothermal reaction with the aid of ethylenediamine in NiCl{sub 2} aqueous solution. The flower with the size of several micrometers in diameter is composed of the ultra-thin nanosheets of several nanometers in thickness. It was found the ethylenediamine is vital to the formation of the flower-like nanoarchitectures. The influence of the concentration of the ethylenediamine and the reaction temperature on the formation of the flowers was analyzed and the formation mechanism of the flowers was proposed. Such flower-like {beta}-Ni(OH){sub 2} nanoarchitectures will find potential applications in the fields, such as electrode, or will be used as a starting material to produce NiO, which is widely used in the magnetic, catalysts, sensor and electrochromic devices. - Graphical abstract: Flower-like Ni(OH){sub 2} nanoarchitectures were synthesized by a one-step mild hydrothermal reaction with the aid of ethylenediamine in NiCl{sub 2} aqueous solution. The flower with the size of several micrometers in diameter is composed of the ultra-thin nanosheets of several nanometers in thickness. The flowers could be in catalysts, sensor and electrochromic devices, and alkaline rechargeable batteries.

  16. Entanglement entropies in the ground states of helium-like atoms

    E-Print Network [OSTI]

    Przemyslaw Koscik; Anna Okopinska

    2014-06-01T23:59:59.000Z

    We examine the entanglement in the ground states of helium and helium-like ions using an original Hylleraas expansion. The von Neumann and linear entropies of the reduced density matrix are accurately computed by performing the Schmidt decomposition of the S singlet spatial wavefunctions. The results presented are more accurate than currently available in published literature.

  17. 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

  18. 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

  19. C-V Profiling of Ultrashallow Junctions using a Step-Like Background Doping Profile

    E-Print Network [OSTI]

    Technische Universiteit Delft

    C-V Profiling of Ultrashallow Junctions using a Step-Like Background Doping Profile Milos Popadi, Delft, The Netherlands m.popadic@tudelft.nl Abstract--A novel C-V profiling method that enables profiling of ultrashallow and ultra-abrupt junctions is described. The method takes advantage of a peculiar

  20. Advances in PSII Deposited Diamond-Like Carbon Coatings for Use as a Corrosion Barrier

    E-Print Network [OSTI]

    Advances in PSII Deposited Diamond-Like Carbon Coatings for Use as a Corrosion Barrier R. S to improve corrosion resistance, however, the necessary organometallics needed to implant these materials to produce an adherent, hard, wear and, corrosion-resistant coating plays a vital role. These applications

  1. Learn What a Heart Attack Feels Like--It Could Save Your Life.

    E-Print Network [OSTI]

    Bandettini, Peter A.

    Learn What a Heart Attack Feels Like-- It Could Save Your Life. This fact sheet tells you about heart attack signs. It also tells you what to do if you are having any of these signs. Take these steps. They could save your life. 1. Know the signs of a heart attack. 2. Understand that heart attacks are not all

  2. Tycho Brahe didn't like to talk about his data. Throughout his life, he kept

    E-Print Network [OSTI]

    Loss, Daniel

    Tycho Brahe didn't like to talk about his data. Throughout his life, he kept his meticulously, in particular) Johannes Kepler. Only after Tycho's death in 1601 did Kepler gain full access to the data historical characters including Isaac Newton, if not Tycho or Kepler), and solving Sudoku puzzles. In fact

  3. Searching for an Axion-like Particle at the Large Hadron Collider

    E-Print Network [OSTI]

    Claudio Coriano; Marco Guzzi; Antonio Mariano

    2009-05-27T23:59:59.000Z

    Axion-like particles are an important part of the spectrum of anomalous gauge theories involving modified mechanisms of cancellation of the gauge anomalies. Among these are intersecting brane models, which are characterized by the presence of one physical axion. We overview a recent study of their supersymmetric construction and some LHC studies of the productions rates for a gauged axion.

  4. Non-classical properties of quantum wave packets propagating in a Kerr-like medium

    E-Print Network [OSTI]

    C. Sudheesh; S. Lakshmibala; V. Balakrishnan

    2005-02-08T23:59:59.000Z

    We investigate non-classical effects such as fractional revivals, squeezing and higher-order squeezing of photon-added coherent states propagating through a Kerr-like medium.The Wigner functions corresponding to these states at the instants of fractional revivals are obtained, and the extent of non-classicality quantified.

  5. 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 The Jet Stream Conundrum Baldwin, Rhines, Huang & McIntyre, Nature 2007 #12;For Earth's oceans, density and jets Tracks of fast sea- surface drifters, Jakobsen 1994 #12;channels & atmospheres: PV stirring

  6. 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

  7. Osteoblast proliferation on neat and apatite-like calcium phosphate-coated titanium foam scaffolds

    E-Print Network [OSTI]

    Tas, A. Cuneyt

    Osteoblast proliferation on neat and apatite-like calcium phosphate-coated titanium foam scaffolds-bearing ability of lightweight titanium made it possible to be used as a biomaterial, especially in hip revision and fixation surgery. It was initially shown that sand-blasted or surface-roughened titanium implants had

  8. Relationship of the commutation rules to classical-like representations of quantum angular momenta addition

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    addition Alejandro Morales and Alejandro Amaya-Tapia Centro de Ciencias Fisicas, Universidad Nacional Auto 1999 We perform an analysis of a graphical representation for the addition of two angular momenta addition of angular momenta may be represented using classical-like diagrams. 1999 American Association

  9. 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

  10. proteinsSTRUCTURE O FUNCTION O BIOINFORMATICS STITCHER: Dynamic assembly of likely

    E-Print Network [OSTI]

    Gifford, David K.

    the right conditions, a great many, perhaps most, proteins have the potential to form amyloids. The tendency. In addition, significant conformational heterogeneity is known or suspected to exist in many amyloid fibrilsproteinsSTRUCTURE O FUNCTION O BIOINFORMATICS STITCHER: Dynamic assembly of likely amyloid

  11. Oligomeric Assembly of Native-like Precursors Precedes Amyloid Formation by -2 Microglobulin

    E-Print Network [OSTI]

    Miranker, Andrew

    intermediates suggest that this protein forms fibrils by structural domain swapping. Amyloid fibers are highlyOligomeric Assembly of Native-like Precursors Precedes Amyloid Formation by -2 MicroglobulinVed January 29, 2004; ReVised Manuscript ReceiVed March 19, 2004 ABSTRACT: The deposition of -2-microglobulin

  12. Viability Studies of Biofuels Though biofuels (like ethanol) promise renewable "green" energy, these

    E-Print Network [OSTI]

    Hill, Wendell T.

    Viability Studies of Biofuels Though biofuels (like ethanol) promise renewable "green" energy cannot possibly meet U.S. energy demands, and current methods of biofuel production often consume as much energy as they produce. If biofuels are to be viable long-term energy solutions, we need new sources

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

    E-Print Network [OSTI]

    Paris-Sud XI, Universit 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

  14. Phonon-like excitation in secondary and tertiary structure of hydrated protein Mingda Li,a

    E-Print Network [OSTI]

    Chen, Sow-Hsin

    Phonon-like excitation in secondary and tertiary structure of hydrated protein powders Mingda Li dispersion relations and their damping in two hydrated proteins, a-chymotrypsinogen A and casein, differing transition temperature TD: hydrated proteins are conformationally flexible and enzymatically active above TD

  15. Mining Likely Properties of Access Control Policies via Association Rule Mining

    E-Print Network [OSTI]

    Xie, Tao

    Mining Likely Properties of Access Control Policies via Association Rule Mining JeeHyun Hwang1 Tao.hu@nist.gov maltunay@fnal.gov Abstract. Access control mechanisms are used to control which princi- pals (such as users Introduction Access control mechanisms are used to control which principals (such as users or processes) have

  16. Design Technical Brief A Geometric Path Planner for Car-like

    E-Print Network [OSTI]

    Deng, Jiansong

    Journal of Mechanical Design Technical Brief A Geometric Path Planner for Car-like Robots Shiang a refined slabbing method, originally used for free-flying robots, for finding efficient paths for nonholo- nomic robots. Our method takes kinematic constraints and rever- sal maneuvers into account. We create

  17. NONLINEAR TRACKING CONTROL OF A CAR-LIKE MOBILE ROBOT VIA DYNAMIC FEEDBACK LINEARIZATION

    E-Print Network [OSTI]

    Hu, Huosheng

    NONLINEAR TRACKING CONTROL OF A CAR-LIKE MOBILE ROBOT VIA DYNAMIC FEEDBACK LINEARIZATION Erfu Yang Tokyo Institute of Technology, Tokyo 152-8552, Japan Keywords: Nonlinear tracking control, Mobile robot behaviour for mobile robots. This paper addresses the nonlinear trajectory tracking control problem

  18. Estimates for temperature in projectile like fragment in geometric and transport models

    E-Print Network [OSTI]

    Mallik, S; Chaudhuri, G

    2013-01-01T23:59:59.000Z

    Projectile like fragments emerging from heavy ion collision have an excitation energy which is often labeled by a temperature. This temperature was recently calculated using a geometric model. We expand the geometric model to include also dynamic effects using a transport model. The temperatures so deduced agree quite well with values of temperature needed to fit experimental data.

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

    E-Print Network [OSTI]

    Braun, Paul

    by electrodeposition--like nickel-plating a piece of steel. After that, the material is heated, to melt the polystyrene, nickel-metal hydride batteries were preferred for many applications. Even now, they are cheaper than, indeed, opalescent. The next stage is to fill the gaps between the spheres with nickel. This is done

  20. Comment on the future of the Bonneville Power Administration Jim G. Likes, Thurston County, WA

    E-Print Network [OSTI]

    Comment on the future of the Bonneville Power Administration Jim G. Likes, Thurston County, WA Bonneville is a regional agency that markets federal hydropower and augments its power supply with market, everyday citizens, to pay illegally inflated power costs. Because of this, Bonneville should have the legal

  1. The Minimum Distance of Turbo-Like Codes Louay Bazzi, Mohammad Mahdian, Daniel A. Spielman

    E-Print Network [OSTI]

    Spielman, Daniel A.

    1 The Minimum Distance of Turbo-Like Codes Louay Bazzi, Mohammad Mahdian, Daniel A. Spielman Abstract--Worst-case upper bounds are derived on the minimum distance of parallel concatenated Turbo codes that parallel-concatenated Turbo codes and repeat-convolute codes with sub-linear memory are asymptotically bad

  2. A squeeze-like operator approach to position-dependent mass in quantum mechanics

    SciTech Connect (OSTI)

    Moya-Cessa, Hctor M.; Soto-Eguibar, Francisco [Instituto Nacional de Astrofsica, ptica y Electrnica, Calle Luis Enrique Erro No. 1, Santa Mara Tonantzintla, San Andrs Cholula, Puebla CP 72840 (Mexico); Christodoulides, Demetrios N. [CREOL/College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816-2700 (United States)

    2014-08-15T23:59:59.000Z

    We provide a squeeze-like transformation that allows one to remove a position dependent mass from the Hamiltonian. Methods to solve the Schrdinger equation may then be applied to find the respective eigenvalues and eigenfunctions. As an example, we consider a position-dependent-mass that leads to the integrable Morse potential and therefore to well-known solutions.

  3. ENGINEERING & SCIENCE fall 201014 Left: Looking like a knight in a chain-mail hood,

    E-Print Network [OSTI]

    ENGINEERING & SCIENCE fall 201014 Left: Looking like a knight in a chain-mail hood, Koch dons not with a penchant for horror cinema, but with a toothache. "I was teaching a course at the Marine Biological processes is beginning to throw light on how the conscious mind works. #12;fall 2010 ENGINEERING & SCIENCE

  4. What is a seismic reflector like? Nathalie Favretto-Cristini1

    E-Print Network [OSTI]

    Boyer, Edmond

    What is a seismic reflector like? Nathalie Favretto-Cristini1 , Paul Cristini1 , and Eric de of reflectors from a seismic viewpoint. This region is repre- sented by a volume of integration of medium and syncline type. The maximum vertical extent might be larger than the seismic wavelengths for subcritical

  5. The low-frequency sound speed of fluid-like gas-bearing sediments

    E-Print Network [OSTI]

    Wilson, Preston S.

    /s with negligible dispersion between 100 and 400 Hz. The sediment's void fraction and bubble size distribution these and other similar studies, the various models for sound propagation in gassy sediments810 have gone largelyThe low-frequency sound speed of fluid-like gas-bearing sediments Preston S. Wilson Applied

  6. 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

    2015-01-01T23:59:59.000Z

    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.

  7. VOLUME 88 NUMBER 19 8 MAY 2007 Methane hydrate is a clathrate, an ice-like

    E-Print Network [OSTI]

    Mazzini, Adriano

    ., 1999; Bouriak et al., 2000; Hovland and Svensen, 2006], the pres- ence of gas hydrate had never been are lined with hydrate and whether any free gas exists in the chimneys, and to provide evidence209 VOLUME 88 NUMBER 19 8 MAY 2007 Methane hydrate is a clathrate, an ice-like solid formed from

  8. EDM, Axions, AxionEDM, Axions, Axion--Like ParticlesLike Particles, and, and TheThe Dark SideDark SideTheThe Dark SideDark Side

    E-Print Network [OSTI]

    Pines, Alexander

    EDM, Axions, AxionEDM, Axions, Axion--Like ParticlesLike Particles, and, and TheThe Dark Side EDM Proposed search for cosmic domains of A i Lik P i lAxion Like Particles 3 CP violation workshop 2013 #12;10-12 Introduced to solve strong CP problem in QCD: why is n-EDM so small?y Axions may

  9. 2+1 Quantum Gravity with Barbero-Immirzi like parameter on Toric Spatial Foliation

    E-Print Network [OSTI]

    Rudranil Basu; Samir K Paul

    2010-03-17T23:59:59.000Z

    We consider gravity in 2+1 space-time dimensions, with negative cosmological constant and a `Barbero-Immirzi' (B-I) like parameter, when the space-time topology is of the form $ T^2 \\times \\mathbbm{R}$. The phase space structure, both in covariant and canonical framework is analyzed. Full quantization of the theory in the 'constrain first' approach reveals a finite dimensional physical Hilbert space. An explicit construction of wave functions is presented. The dimension of the Hilbert space is found to depend on the `Barbero-Immirzi' like parameter in an interesting fashion. Comparative study of this parameter in light of some of the recent findings in literarure for similar theories is presented.

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

    DOE Patents [OSTI]

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

    1998-11-03T23:59:59.000Z

    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.

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

    DOE Patents [OSTI]

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

    1998-10-20T23:59:59.000Z

    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.

  12. 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

    2015-01-01T23:59:59.000Z

    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...

  13. 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)

    1997-01-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Kelardeh, Hamed Koochaki; Stockman, Mark I

    2015-01-01T23:59:59.000Z

    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.

  15. 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

    2005-07-26T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Majumder, Abhijit; Wang, Xin-Nian

    2005-07-26T23:59:59.000Z

    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.

  17. 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

    2014-07-19T23:59:59.000Z

    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.

  18. A Statistic for identifying cosmic string wakes and other sheet-like structure

    E-Print Network [OSTI]

    James Robinson; Andreas Albrecht

    1996-02-26T23:59:59.000Z

    We describe an implementation of the structure functions of Babul \\& Starkman, in order to quantify the ``sheet-like'' nature of a distribution of matter. We test this statistic on a toy model describing cosmic string wakes, and show that it does a better job than other statistics which have been proposed for distinguishing non-Gaussianity in the form of sheets. We conclude that the most favoured cosmic string model is unlikely to produce a significant increase in the sheet-like nature of the matter distribution beyond that which occurs in Gaussian models (with the same power spectrum) due to the formation of Zeldovich pancakes. Although the statistic was developed in the context of cosmic string wake formation, we expect it to be useful for comparing the observed galaxy distribution with a wide range of theoretical models with different power spectra.

  19. We need lab experiments to look for axion-like particles

    E-Print Network [OSTI]

    Jaeckel, J; Redondo, J; Ringwald, A; Takahashi, F; Jaeckel, Joerg; Masso, Eduard; Redondo, Javier; Ringwald, Andreas; Takahashi, Fuminobu

    2006-01-01T23:59:59.000Z

    The PVLAS signal has renewed the interest in light bosons coupled to the electromagnetic field. However, astrophysical bounds coming from the lifetime of the sun and the CAST experiment are seemingly in conflict with this result. We discuss effective models that allow to suppress production of axion-like particles in the sun and thereby relax the bounds by some orders of magnitude. This stresses the importance of laboratory searches.

  20. Horizon Mechanics and Asymptotic Symmetries with a Immirzi-like Parameter in 2+1 Dimensions

    E-Print Network [OSTI]

    Rudranil Basu; Ayan Chatterjee

    2011-04-06T23:59:59.000Z

    Starting with a generalized theory of 2+1 gravity containing an Immirzi like parameter, we derive the modified laws of black hole mechanics using the formalism of weak isolated horizons. Definitions of horizon mass and angular momentum emerge naturally in this framework. We further go on to analyze the asymptotic symmetries, as first discussed by Brown and Henneaux, and analyze their implications in a completely covariant phase space framework.

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

    E-Print Network [OSTI]

    Yerokhin, V A; Fritzsche, S

    2014-01-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Alexis Larranaga; Luz Angela Garcia

    2008-11-21T23:59:59.000Z

    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.

  3. Implications of theta_13 on Fritzsch-like lepton mass matrices

    E-Print Network [OSTI]

    Fakay, Priyanka; Verma, Rohit; Ahuja, Gulsheen; Gupta, Manmohan

    2013-01-01T23:59:59.000Z

    Implications of the lepton mixing angles, in particular of theta_13, have been investigated for minimal as well as non-minimal Fritzsch-like textures for the case of Majorana neutrinos. Both, in minimal texture (texture 6 zero lepton mass matrices) and non-minimal textures (two cases of texture 5 zero lepton mass matrices), inverted hierarchy and degenerate scenario of neutrino masses have been ruled out. The implications of theta_13 have been investigated on the lightest neutrino mass m_\

  4. Implications of theta_13 on Fritzsch-like lepton mass matrices

    E-Print Network [OSTI]

    Priyanka Fakay; Samandeep Sharma; Rohit Verma; Gulsheen Ahuja; Manmohan Gupta

    2013-01-25T23:59:59.000Z

    Implications of the lepton mixing angles, in particular of theta_13, have been investigated for minimal as well as non-minimal Fritzsch-like textures for the case of Majorana neutrinos. Both, in minimal texture (texture 6 zero lepton mass matrices) and non-minimal textures (two cases of texture 5 zero lepton mass matrices), inverted hierarchy and degenerate scenario of neutrino masses have been ruled out. The implications of theta_13 have been investigated on the lightest neutrino mass m_\

  5. Fast dynamics of an eel-like robot, comparisons with Navier-Stokes simulations

    E-Print Network [OSTI]

    Boyer, Edmond

    the head to the caudal 1 F. Boyer : EMN, IRCCyN, La Chantrerie 4, rue Alfred Kastler B.P. 20722 - 44307Fast dynamics of an eel-like robot, comparisons with Navier-Stokes simulations Frederic Boyer1 Nantes Cedex 3 France. Tel. : +00 33 2 51 85 83 08, Fax : +00 33 2 51 85 83 02, E-mail : frederic.boyer

  6. 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

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

    SciTech Connect (OSTI)

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

    2010-01-01T23:59:59.000Z

    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.

  8. Citation advantage of Open Access articles likely explained by quality differential and media effects

    E-Print Network [OSTI]

    Philip M. Davis

    2007-01-16T23:59:59.000Z

    In a study of articles published in the Proceedings of the National Academy of Sciences, Gunther Eysenbach discovered a significant citation advantage for those articles made freely-available upon publication (Eysenbach 2006). While the author attempted to control for confounding factors that may have explained the citation differential, the study was unable to control for characteristics of the article that may have led some authors to pay the additional page charges ($1,000) for immediate OA status. OA articles published in PNAS were more than twice as likely to be featured on the front cover of the journal (3.3% vs. 1.4%), nearly twice as likely to be picked up by the media (15% vs. 8%) and when cited reached, on average, nearly twice as many news outlets as subscription-based articles (4.2 vs. 2.6). The citation advantage of Open Access articles in PNAS may likely be explained by a quality differential and the amplification of media effects.

  9. 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

    2015-01-01T23:59:59.000Z

    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.

  10. Self-avoiding worm-like chain model for dsDNA loop formation

    E-Print Network [OSTI]

    Yaroslav Pollak; Sarah Goldberg; Roee Amit

    2014-11-06T23:59:59.000Z

    We compute for the first time the effects of excluded volume on the probability for double-stranded DNA to form a loop. We utilize a Monte-Carlo algorithm for generation of large ensembles of self- avoiding worm-like chains, which are used to compute the J-factor for varying lengthscales. In the entropic regime, we confirm the scaling-theory prediction of a power-law drop off of -1.92, which is significantly stronger than the -1.5 power-law predicted by the non-self-avoiding worm-like chain model. In the elastic regime, we find that the angle-independent end-to-end chain distribution is highly anisotropic. This anisotropy, combined with the excluded volume constraints, lead to an increase in the J-factor of the self-avoiding worm-like chain by about half an order of magnitude relative to its non-self-avoiding counterpart. This increase could partially explain the anomalous results of recent cyclization experiments, in which short dsDNA molecules were found to have an increased propensity to form a loop.

  11. Remote Inflation: Hybrid-like inflation without hybrid-type potential

    E-Print Network [OSTI]

    Tomohiro Matsuda

    2009-06-18T23:59:59.000Z

    A new scenario of hybrid-like inflation is considered without using hybrid-type potential. Radiation raised continuously by a dissipating inflaton field keeps symmetry restoration in a remote sector, and the false-vacuum energy of the remote sector dominates the energy density during inflation. Remote inflation is terminated when the temperature reaches the critical temperature, or when the slow-roll condition is violated. Without introducing a complex form of couplings, inflaton field may either roll-in (like a standard hybrid inflation) or roll-out (like an inverted-hybrid model or quintessential inflation) on arbitrary inflaton potential. Significant signatures of remote inflation can be observed in the spectrum caused by (1) the inhomogeneous phase transition in the remote sector, or (2) a successive phase transition in the remote sector. Remote inflation can predict strong amplification or suppression of small-scale perturbations without introducing multiple inflation. Since the inflaton may have a run-away potential, it is also possible to identify the inflaton with quintessence, without introducing additional mechanisms. Even if the false-vacuum energy is not dominated by the remote sector, the phase transition in the remote sector is possible during warm inflation, which may cause significant amplification/suppression of the curvature perturbations.

  12. Remote inflation: hybrid-like inflation without hybrid-type potential

    SciTech Connect (OSTI)

    Matsuda, Tomohiro, E-mail: matsuda@sit.ac.jp [Laboratory of Physics, Saitama Institute of Technology, Fusaiji, Okabe-machi, Saitama 369-0293 (Japan)

    2009-07-01T23:59:59.000Z

    A new scenario of hybrid-like inflation is considered without using hybrid-type potential. Radiation raised continuously by a dissipating inflaton field keeps symmetry restoration in a remote sector, and the false-vacuum energy of the remote sector dominates the energy density during inflation. Remote inflation is terminated when the temperature reaches the critical temperature, or when the slow-roll condition is violated. Without introducing a complex form of couplings, inflaton field may either roll-in (like a standard hybrid inflation) or roll-out (like an inverted-hybrid model or quintessential inflation) on arbitrary inflaton potential. Significant signatures of remote inflation can be observed in the spectrum caused by 1. the inhomogeneous phase transition in the remote sector, or; 2. a successive phase transition in the remote sector. Remote inflation can predict strong amplification or suppression of small-scale perturbations without introducing multiple inflation. Since the inflaton may have a run-away potential, it is also possible to identify the inflaton with quintessence, without introducing additional mechanisms. Even if the false-vacuum energy is not dominated by the remote sector, the phase transition in the remote sector is possible during warm inflation, which may cause significant amplification/suppression of the curvature perturbations.

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

    E-Print Network [OSTI]

    Giancarlo Cicconofri; Antonio DeSimone

    2014-09-13T23:59:59.000Z

    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.

  14. Can the "Darmstadt oscillations" be treated as two closely spaced mass-eigenstates of the H-like mother ions ?

    E-Print Network [OSTI]

    M. Faber; A. N. Ivanov; P. Kienle; E. L. Kryshen; M. Pitschmann; N. I. Troitskaya

    2008-11-06T23:59:59.000Z

    We discuss the proposal that the "Darmstadt oscillations" of the orbital K-shell electron capture decay (EC) rate of the H-like heavy ions are caused by quantum beats of two coherently excited, closely spaced mass-eigenstates of decaying H-like heavy ions. We show that such a mechanism to explain the time modulation of the EC-decay rates of the H-like heavy ions leads to the time modulation of the beta^+ decay rate of these ions with the same period. Such a time-dependence of the beta^+ decay rate of the H-like heavy ions contradicts the experimental data of GSI.

  15. Evidence for an axion-like particle from PKS 1222+216?

    E-Print Network [OSTI]

    F. Tavecchio; M. Roncadelli; G. Galanti; G. Bonnoli

    2012-09-19T23:59:59.000Z

    The surprising discovery by MAGIC of an intense, rapidly varying emission in the energy range 70 - 400 GeV from the flat spectrum radio quasar PKS 1222+216 represents a challenge for all interpretative scenarios. Indeed, in order to avoid absorption of \\gamma rays in the dense ultraviolet radiation field of the broad line region (BLR), one is forced to invoke some unconventional astrophysical picture, like for instance the existence of a very compact (r\\sim 10^{14} cm) emitting blob at a large distance (R \\sim10^{18} cm) from the jet base. We offer the investigation of a scenario based on the standard blazar model for PKS 1222+216 where \\gamma rays are produced close to the central engine, but we add the new assumption that inside the source photons can oscillate into axion-like particles (ALPs), which are a generic prediction of several extensions of the Standard Model of elementary particle interactions. As a result, a considerable fraction of very-high-energy photons can escape absorption from the BLR through the mechanism of photon-ALP oscillations much in the same way as they largely avoid absorption from extragalactic background light when propagating over cosmic distances in the presence of large-scale magnetic fields in the nG range. In addition we show that the above MAGIC observations and the simultaneous Fermi/LAT observations in the energy range 0.3 - 3 GeV can both be explained by a standard spectral energy distribution for experimentally allowed values of the model parameters. In particular, we need a very light ALP just like in the case of photon-ALP oscillations in cosmic space. Moreover, we find it quite tantalizing that the most favorable value of the photon-ALP coupling happens to be the same in both situations. Although our ALPs cannot contribute to the cold dark matter, they are a viable candidate for the quintessential dark energy. [abridged

  16. Exendin-4, a glucagon-like peptide-1 receptor agonist, reduces intimal thickening after vascular injury

    SciTech Connect (OSTI)

    Goto, Hiromasa [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan)] [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Nomiyama, Takashi, E-mail: tnomiyama@fukuoka-u.ac.jp [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan)] [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Mita, Tomoya; Yasunari, Eisuke; Azuma, Kosuke; Komiya, Koji; Arakawa, Masayuki; Jin, Wen Long; Kanazawa, Akio [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan)] [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Kawamori, Ryuzo [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan) [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Sportology Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Center for Therapeutic Innovations in Diabetes, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Center for Beta Cell Biology and Regeneration, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Fujitani, Yoshio; Hirose, Takahisa [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan) [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Center for Therapeutic Innovations in Diabetes, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Watada, Hirotaka, E-mail: hwatada@juntendo.ac.jp [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan) [Department of Medicine, Metabolism and Endocrinology, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan); Sportology Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421 (Japan)

    2011-02-04T23:59:59.000Z

    Research highlights: {yields} Exendin-4 reduces neointimal formation after vascular injury in a mouse model. {yields} Exendin-4 dose not alter metabolic parameters in non-diabetic, non-obese mouse model. {yields} Exendin-4 reduces PDGF-induced cell proliferation in cultured SMCs. {yields} Exendin-4 may reduces neointimal formation after vascular injury at least in part through its direct action on SMCs. -- Abstract: Glucagon-like peptide-1 is a hormone secreted by L cells of the small intestine and stimulates glucose-dependent insulin response. Glucagon-like peptide-1 receptor agonists such as exendin-4 are currently used in type 2 diabetes, and considered to have beneficial effects on the cardiovascular system. To further elucidate the effect of glucagon-like peptide-1 receptor agonists on cardiovascular diseases, we investigated the effects of exendin-4 on intimal thickening after endothelial injury. Under continuous infusion of exendin-4 at 24 nmol/kg/day, C57BL/6 mice were subjected to endothelial denudation injury of the femoral artery. Treatment of mice with exendin-4 reduced neointimal formation at 4 weeks after arterial injury without altering body weight or various metabolic parameters. In addition, in vitro studies of isolated murine, rat and human aortic vascular smooth muscle cells showed the expression of GLP-1 receptor. The addition of 10 nM exendin-4 to cultured smooth muscle cells significantly reduced their proliferation induced by platelet-derived growth factor. Our results suggested that exendin-4 reduced intimal thickening after vascular injury at least in part by the suppression of platelet-derived growth factor-induced smooth muscle cells proliferation.

  17. A search for radioactive 26Al in the nova-like variable V4332 Sagittarii

    E-Print Network [OSTI]

    D. P. K. Banerjee; N. M. Ashok; O. Launila; C. J. Davis; W. P. Varricatt

    2004-06-21T23:59:59.000Z

    We have searched for the important radioactive isotope 26Al in the nova-like source V4332 Sgr. Recent results from gamma ray astronomy show that there is pervasive emission of the 1.809 MeV gamma ray photon, arising from the decay of 26Al to 26Mg, from all over the galactic plane. Though the sites from where this emission originates are not clearly established, novae are believed to be an important contributing source. In this context, V4332 Sgr presented a rare opportunity to observationally investigate whether novae or novae-like sources synthesize 26Al and to what extent. Strong AlO bands in the near-IR have been reported in this object recently. As molecular bands of different isotopic compositions are readily resolved spectroscopically (e.g. 12CO and 13CO), it was thought that the components of AlO associated with 26Al and stable 27Al could be detected as separate bands. Our spectra indicate that there is no strong presence of 26Al in V4332 Sgr. A reliable upper limit of 0.10 for the 26Al/27Al ratio is determined which constitutes the first observational constraint for this ratio in a potential 26Al producing source. While V4332 Sgr is not a typical nova, its outburst amplitude and light-curve behaviour bear close similarity to that of novae. Hence, although the results from V4332 Sgr cannot be directly extended to novae in general, the limit on the observed 26Al/27Al ratio could be a useful input in constraining rather uncertain nucleosynthesis models for the production of 26Al in novae/novae-like sources. By comparing the observed 26Al/27Al ratio in V4332 Sgr with that expected in classical novae it appears unlikely that the progenitor of V4332 Sgr is an Oxygen-Neon-Magnesium white dwarf.

  18. Numerical construction of initial data for Einstein's equations with static extension to space-like infinity

    E-Print Network [OSTI]

    Georgios Doulis; Oliver Rinne

    2014-11-28T23:59:59.000Z

    We describe a numerical method to construct Cauchy data extending to space-like infinity based on Corvino's (2000) gluing method. Adopting the setting of Giulini and Holzegel (2005), we restrict ourselves here to vacuum axisymmetric spacetimes and glue a Schwarzschildean end to Brill-Lindquist data describing two non-rotating black holes. Our numerical implementation is based on pseudo-spectral methods, and we carry out extensive convergence tests to check the validity of our numerical results. We also investigate the dependence of the total ADM mass on the details of the gluing construction.

  19. A like-sign dimuon charge asymmetry at Tevatron induced by the anomalous top quark couplings

    E-Print Network [OSTI]

    Jong Phil Lee; Kang Young Lee

    2011-10-26T23:59:59.000Z

    We show that the recently measured 3.2 $\\sigma$ deviations of the charge asymmetry of like-sign dimuon events from the standard model prediction by the D0 collaboration at Tevatron can be explained by introducing the anomalous right-handed top quark couplings. Combined analysis with the $\\bs$ and $\\bd$ mixings and $B \\to X_s \\gamma$ decays has been performed. We discuss how to discriminate the effects on the dimuon charge asymmetry of the anomalous $\\tsW$ and $\\tbW$ couplings.

  20. 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

    2011-08-19T23:59:59.000Z

    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.

  1. Goos-Hnchen like Shifts for Graphene Barrier in Constant Magnetic Field

    E-Print Network [OSTI]

    Ahmed Jellal; Miloud Mekkaoui; Youness Zahidi

    2014-04-22T23:59:59.000Z

    We consider a system of Dirac fermions in graphene submitted to a constant perpendicular magnetic field and scattered by a barrier potential. We show that our system can be used to establish a link with quantum optics through the Goos-H\\"{a}nchen shifts. This can be done by evaluating the corresponding transmission probability and shift phase. We obtain Goos-H\\"{a}nchen like shifts in terms of different physical parameters such as energy, electrostatic potential strength and magnetic field. On the light of this relation, we discuss the obtained results and make comparison with literature.

  2. Jet Quenching in High Energy Heavy Ion Collisions by QCD Synchrotron-like Radiation

    E-Print Network [OSTI]

    E. V. Shuryak; I. Zahed

    2002-07-12T23:59:59.000Z

    We consider synchrotron-like radiation in QCD by generalizing Schwinger's treatment of quantum synchrotron radiation in QED to the case of a constant chromomagnetic field. We suggest a novel mechanism for {\\em jet quenching} in heavy ion collisions, whereby high-$p_t$ partons get depleted through strong (classical) color fields. The latters are encountered in the color glass condensate or in the form of expanding shells of exploding sphalerons. Unlike bremsstrahlung radiation through multiple soft rescattering, synchrotron radiation converts a jet into a wide shower of soft gluons. We estimate the energy loss through this mechanism and suggest that it contributes significantly to the unexpectedly strong jet quenching observed at RHIC.

  3. Standard Model-like D-brane models and gauge couplings

    E-Print Network [OSTI]

    Yuta Hamada; Tatsuo Kobayashi; Shohei Uemura

    2014-09-09T23:59:59.000Z

    We systematically search intersecting D-brane models, which just realize the Standard Model chiral matter contents and gauge symmetry. We construct new classes of non-supersymmetric Standard Model-like models. We also study gauge coupling constants of these models. The tree level gauge coupling is a function of compactification moduli, string scale, string coupling and winding number of D-branes. By tuning them, we examine whether the models can explain the experimental values of gauge couplings. As a result, we find that the string scale should be greater than $10^{14-15}$GeV if the compactification scale and the string scale are the same order.

  4. GUT and standard-like models in intersecting D-brane worlds

    E-Print Network [OSTI]

    Chen, Ching-Ming

    2006-10-30T23:59:59.000Z

    on Type IIA T6 orientifold. The complete gauge symmetry is U(5) ?U(1)4 ?USp(12) ?USp(8) ?USp(4). . . . . . . . . . . . . 81 XXVII The particle spectrum in the observable and Higgs sectors with the four global U(1)s from the Green-Schwarz mechanism.... The starprimed representations indicate vector-like matter. . . . . . . . . . . . . 83 XXVIII The SM fermions and Higgs fields in the U(4)C ?U(2)L ?U(1)prime ? U(1)primeprime ?U(1)e?U(1)f ?USp(4)2 model, with anomaly free U(1)I3R and U(1)X gauge symmetries...

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

    E-Print Network [OSTI]

    Mikkel H. Brynildsen; Horia D. Cornean

    2013-02-21T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

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

    1999-04-08T23:59:59.000Z

    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.

  7. Precise energy eigenvalues of hydrogen-like ion moving in quantum plasmas

    E-Print Network [OSTI]

    Dutta, S; Mukherjee, T K

    2014-01-01T23:59:59.000Z

    The analytic form of the electrostatic potential felt by a slowly moving test charge in quantum plasma is being derived. It has been shown that the potential composed of two parts: Debye-Huckel screening term and near-field wake potential which depends on the velocity of the test charge and the number density of the plasma electrons. Rayleigh-Ritz variational calculation has been done to estimate precise energy eigenvalues of hydrogen-like ion under such plasma environment. A detailed analysis shows that the energy levels are gradually moves to the continuum with increasing plasma electron density while level crossing phenomenon have been observed with the variation of ion velocity.

  8. 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

    1995-09-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Giovanni Filatrella; Arne Hejde Nielsen; Niels Falsig Pedersen

    2008-02-16T23:59:59.000Z

    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'.

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

    SciTech Connect (OSTI)

    Shumack, A. E., E-mail: amy.shumack@ccfe.ac.uk [JET-EFDA, Culham Science Centre, Abingdon OX14 3DB (United Kingdom); FOM Institute DIFFER, P.O. Box 1207, NL-3430 BE Nieuwegein (Netherlands); Rzadkiewicz, J. [National Centre for Nuclear Research, Andrzeja So?tana 7, 05-400 Otwock (Poland); Chernyshova, M.; Czarski, T.; Karpinski, L. [Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw (Poland); Jakubowska, K. [Institute of Plasma Physics and Laser Microfusion, Hery 23, 01-497 Warsaw (Poland); Universit Bordeaux, CNRS, CEA, CELIA, UMR 5107, F-33405 Talence (France); Scholz, M. [Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342 Krakw (Poland); Byszuk, A.; Cieszewski, R.; Kasprowicz, G.; Pozniak, K.; Wojenski, A.; Zabolotny, W. [Institute of Electronic Systems, Warsaw University of Technology, 00-665 Warsaw (Poland); Dominik, W. [Faculty of Physics, Institute of Experimental Physics, Warsaw University, 00-681 Warsaw (Poland); Conway, N. J.; Dalley, S.; Tyrrell, S.; Zastrow, K.-D. [JET-EFDA, Culham Science Centre, Abingdon OX14 3DB (United Kingdom); Figueiredo, J. [EFDA-CSU, Culham Science Centre, Abingdon OX14 3DB (United Kingdom); Associao EURATOM/IST, Instituto de Plasmas e Fuso Nuclear, Instituto Superior Tcnico, Av Rovisco Pais, 1049-001 Lisbon (Portugal); and others

    2014-11-15T23:59:59.000Z

    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.

  11. Excitation of autoionizing states of helium-like ions by scattering of high-energy particles

    SciTech Connect (OSTI)

    Mikhailov, A. I.; Mikhailov, I. A.; Nefiodov, A. V., E-mail: anef@thd.pnpi.spb.ru [B. P. Konstantinov Petersburg Nuclear Physics Institute (Russian Federation); Plunien, G. [Technische Universitaet Dresden, Institut fuer Theoretische Physik (Germany)] [Technische Universitaet Dresden, Institut fuer Theoretische Physik (Germany)

    2013-03-15T23:59:59.000Z

    The cross sections for two-electron excitations of helium-like atomic systems into the autoionizing 2s{sup 2} ({sup 1}S)- and 2p{sup 2} ({sup 1}S)-states by collisions with high-energy electrons and photons are deduced. The evaluations are performed to the leading order of non-relativistic perturbation theory. The analytical formulas for cross sections are obtained in the form of universal scalings. A comparison of our theoretical predictions with available theoretical and experimental results for the helium atom is made.

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

    SciTech Connect (OSTI)

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

    2013-10-15T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

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

    2012-01-17T23:59:59.000Z

    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.

  14. Running anti-de Sitter radius from QCD-like strings

    E-Print Network [OSTI]

    Yu-tin Huang; Warren Siegel

    2007-07-10T23:59:59.000Z

    We consider renormalization effects for a bosonic QCD-like string, whose partons have $1/p^{2}$ propagators instead of Gaussian. Classically this model resembles (the bosonic part of) the projective light-cone (zero-radius) limit of a string on an AdS${}_5$ background, where Schwinger parameters give rise to the fifth dimension. Quantum effects generate dynamics for this dimension, producing an AdS${}_5$ background with a running radius. The projective light-cone is the high-energy limit: Holography is enforced dynamically.

  15. Search for solar hadronic axions produced by a bremsstrahlung-like process

    E-Print Network [OSTI]

    D. Kekez; A. Ljubicic; Z. Krecak; M. Krcmar

    2008-12-22T23:59:59.000Z

    We have searched for hadronic axions which may be produced in the Sun by a bremsstrahlung-like process, and observed in the HPGe detector by an axioelectric effect. A conservative upper limit on the hadronic axion mass m_a < 334 eV at 95% C.L. is obtained. Our experimental approach is based on the axion-electron coupling and it does not include the axion-nucleon coupling, which suffers from the large uncertainties related to the estimation of the flavor-singlet axial-vector matrix element.

  16. Panel 2 - properties of diamond and diamond-like-carbon films

    SciTech Connect (OSTI)

    Blau, P.J.; Clausing, R.E. [Oak Ridge National Lab., TN (United States); Ajayi, O.O.; Liu, Y.Y.; Purohit, A. [Argonne National Lab., IL (United States); Bartelt, P.F. [Deere & Co., Moline, IL (United States); Baughman, R.H. [Allied Signal, Morristown, NJ (United States); Bhushan, B. [Ohio State Univ., Columbus (United States); Cooper, C.V. [United Technologies Research Center, East Hartford, CT (United States); Dugger, M.T. [Sandia National Laboratories, Albuquerque, NM (United States); Freedman, A. [Aerodyne Research, Inc., Billerica, MA (United States); Larsen-Basse, J. [National Science Foundation, Washington, DC (United States); McGuire, N.R. [Caterpillar, Peoria, IL (United States); Messier, R.F. [Pennsylvania State Univ., University Park (United States); Noble, G.L.; Ostrowki, M.H. [John Crane, Inc., Morton Grove, IL (United States); Sartwell, B.D. [Naval Research Lab., Washington, DC (United States); Wei, R. [Colorado State Univ., Fort Collins (United States)

    1993-01-01T23:59:59.000Z

    This panel attempted to identify and prioritize research and development needs in determining the physical, mechanical and chemical properties of diamond and diamond-like-carbon films (D/DLCF). Three specific goals were established. They were: (1) To identify problem areas which produce concern and require a better knowledge of D/DLCF properties. (2) To identify and prioritize key properties of D/DLCF to promote transportation applications. (3) To identify needs for improvement in properties-measurement methods. Each of these goals is addressed subsequently.

  17. GUT and standard-like models in intersecting D-brane worlds

    E-Print Network [OSTI]

    Chen, Ching-Ming

    2006-10-30T23:59:59.000Z

    on Type IIA T6 orientifold. The complete gauge symmetry is U(5) ?U(1)4 ?USp(12) ?USp(8) ?USp(4). . . . . . . . . . . . . 81 XXVII The particle spectrum in the observable and Higgs sectors with the four global U(1)s from the Green-Schwarz mechanism.... The starprimed representations indicate vector-like matter. . . . . . . . . . . . . 83 XXVIII The SM fermions and Higgs fields in the U(4)C ?U(2)L ?U(1)prime ? U(1)primeprime ?U(1)e?U(1)f ?USp(4)2 model, with anomaly free U(1)I3R and U(1)X gauge symmetries...

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

    E-Print Network [OSTI]

    G. A. Baramidze; G. A. Kharadze

    2006-05-02T23:59:59.000Z

    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}\

  19. 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

    2015-01-01T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

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

    2015-04-10T23:59:59.000Z

    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.

  1. Gibbs paradox and a possible mechanism of like-charge attraction in colloids

    E-Print Network [OSTI]

    Chi-Lun Lee; Yiing-Rei Chen

    2011-12-30T23:59:59.000Z

    Based on a reconsideration of the Gibbs paradox, we show that a residual, non-extensive term in entropy turns up upon mixing identical particles, whether they are indistinguishable or not. The positive contribution from this residual entropy leads to a decrease in free energy, and we suggest that this entropic mechanism may serve as a source of like-charge attractions between a pair of colloidal particles or other macroions. For a system of two colloidal particles along with their neutralizing counterions, such decrease in free energy is of a few thermal energies and therefore crucial to the effective interaction between the particles.

  2. 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2:Introduction toManagement of theTechno-economic Evaluation of theSafetyIt Seems Like Shale

  3. 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer Solar Cells ImpedesStructure ofHuman Toll-like

  4. Hey There. Would You Like to Buy a Thneed? | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: FinalOffers3.pdf0-45.pdf0 BudgetGoalsHealth and ProductivityHey There. Would You Like to

  5. Plasmon excitation by the Gaussian-like core mode of a photonic crystal waveguide or a fiber

    E-Print Network [OSTI]

    Skorobogatiy, Maksim

    Plasmon excitation by the Gaussian-like core mode of a photonic crystal waveguide or a fiber Maksim of a plasmon by the Gaussian-like leaky core mode of a metal covered 1D photonic crystal waveguide or fiber 2006 Optical Society of America OCIS codes: (130.6010) Sensors, (240.6680) Surface plasmons, (230

  6. PHYSICAL REVIEW E 83, 061301 (2011) Simulation of a Casimir-like effect in a granular pile with avalanches

    E-Print Network [OSTI]

    Wijngaarden, Rinke J.

    2011-01-01T23:59:59.000Z

    PHYSICAL REVIEW E 83, 061301 (2011) Simulation of a Casimir-like effect in a granular pile-Tang-Wiesenfeld model for sand piles, we simulate a Casimir-like effect in a granular pile with avalanches. Results of walls placed on the slope of the pile is investigated, but the prevention effect is found

  7. Dirac Point and Edge States in a Microwave Realization of Tight-Binding Graphene-like Structures

    E-Print Network [OSTI]

    Boyer, Edmond

    Dirac Point and Edge States in a Microwave Realization of Tight-Binding Graphene-like Structures U-binding graphene-like structures. The structures are realized using disks with a high index of refraction properties, mechan- ically as electronically. Another realization is graphene, a one-atom-thick allotrope

  8. 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

  9. Discriminant Analysis of XRF Data from Sandstones of Like Facies and Appearance: A Method for Identifying a Regional Unconformity, Paleotopography,

    E-Print Network [OSTI]

    Seamons, Kent E.

    Discriminant Analysis of XRF Data from Sandstones of Like Facies and Appearance: A Method Reserved #12;ABSTRACT Discriminant Analysis of XRF Data from Sandstones of Like Facies and Appearance candidate surfaces. Using statistical discriminant analysis of XRF data, formations bounding an unconformity

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

    E-Print Network [OSTI]

    Chaboureau, Jean-Pierre

    2006-01-01T23:59:59.000Z

    Predictability 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) on 26 September 2006 downstream of the ET of Hurricane Helene from 22 to 25 September. While

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

    E-Print Network [OSTI]

    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

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

    E-Print Network [OSTI]

    Enrico Bertuzzo; Claudia Frugiuele

    2014-12-08T23:59:59.000Z

    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.

  13. Effects of Radiative Diffusion on Thin Flux Tubes in Turbulent Solar-like Convection

    E-Print Network [OSTI]

    Weber, Maria A

    2015-01-01T23:59:59.000Z

    We study the combined effects of convection and radiative diffusion on the evolution of thin magnetic flux tubes in the solar interior. Radiative diffusion is the primary supplier of heat to convective motions in the lower convection zone, and it results in a heat input per unit volume of magnetic flux tubes that has been ignored by many previous thin flux tube studies. We use a thin flux tube model subject to convection taken from a rotating spherical shell of turbulent, solar-like convection as described by Weber, Fan, and Miesch (2011, Astrophys. J., 741, 11; 2013, Solar Phys., 287, 239), now taking into account the influence of radiative heating on flux tubes of large-scale active regions. Our simulations show that flux tubes of less than or equal to 60 kG subject to solar-like convective flows do not anchor in the overshoot region, but rather drift upward due to the increased buoyancy of the flux tube earlier in its evolution as a result of the inclusion of radiative diffusion. Flux tubes of magnetic fie...

  14. Programming Self-assembly of Virus-like Shells via Colloidal Bond Hybridization

    E-Print Network [OSTI]

    Chris H. J. Evers; Jurriaan A. Luiken; Peter G. Bolhuis; Willem K. Kegel

    2015-03-02T23:59:59.000Z

    Colloids with directional interactions are promising building blocks for new functional materials and models for biological structures[1-3]. Using rigid patches, for example, particles have been programmed to self-assemble into kagome lattices and colloidal equivalents of molecules and micelles[4-6]. Self-assembly into more complex structures such as virus-like shells, however, requires more complex patch geometries [7], which$-$to the best of our knowledge$-$have not been experimentally realized yet. Protein building blocks of real viruses, on the other hand, can undergo conformational changes upon self-assembly[8-9]. Here we demonstrate, by combining experiments and simulations, that conformationally changeable colloids self-assemble into complex structures such as virus-like shells. These floppy colloids contain both mutually attractive and repulsive surface groups that are mobile. Analogous to the simplest chemical bond, where two isotropic orbitals hybridize into the molecular orbital of H$_24, these mobile groups redistribute upon binding. By introducing bond hybridization in the colloidal domain, we programmed relatively simple flexible building blocks to self-assemble into dramatically more complex structures than would have been anticipated based on their rigid geometry.

  15. A PRECISE ASTEROSEISMIC AGE AND RADIUS FOR THE EVOLVED SUN-LIKE STAR KIC 11026764

    SciTech Connect (OSTI)

    Metcalfe, T. S. [High Altitude Observatory, National Center for Atmospheric Research, Boulder, CO 80307 (United States); Monteiro, M. J. P. F. G. [Centro de Astrofisica and DFA-Faculdade de Ciencias, Universidade do Porto (Portugal); Thompson, M. J. [School of Mathematics and Statistics, University of Sheffield, Hounsfield Road, Sheffield S3 7RH (United Kingdom); Molenda-Zakowicz, J. [Astronomical Institute, University of Wroclaw, ul. Kopernika 11, 51-622 Wroclaw (Poland); Appourchaux, T. [Institut d'Astrophysique Spatiale, Universite Paris XI-CNRS (UMR8617), Batiment 121, 91405 Orsay Cedex (France); Chaplin, W. J. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT (United Kingdom); Dogan, G. [Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark); Eggenberger, P. [Geneva Observatory, University of Geneva, Maillettes 51, 1290 Sauverny (Switzerland); Bedding, T. R.; Stello, D. [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006 (Australia); Bruntt, H. [Observatoire de Paris, 5 place Jules Janssen, 92190 Meudon Principal Cedex (France); Creevey, O. L. [Instituto de Astrofisica de Canarias, E-38200 La Laguna (Spain); Quirion, P.-O. [Canadian Space Agency, 6767 Boulevard de l'Aeroport, Saint-Hubert, QC, J3Y 8Y9 (Canada); Bonanno, A. [INAF-Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123 Catania (Italy); Silva Aguirre, V. [Max-Planck-Institute for Astrophysics, Karl Schwarzschild Str. 1, Garching, D-85741 (Germany); Basu, S.; Esch, L.; Gai, N. [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Di Mauro, M. P. [INAF-IASF Roma, Istituto di Astrofisica Spaziale e Fisica Cosmica, via del Fosso del Cavaliere 100, 00133 Roma (Italy); Kosovichev, A. G. [HEPL, Stanford University, Stanford, CA 94305-4085 (United States)

    2010-11-10T23:59:59.000Z

    The primary science goal of the Kepler Mission is to provide a census of exoplanets in the solar neighborhood, including the identification and characterization of habitable Earth-like planets. The asteroseismic capabilities of the mission are being used to determine precise radii and ages for the target stars from their solar-like oscillations. Chaplin et al. published observations of three bright G-type stars, which were monitored during the first 33.5 days of science operations. One of these stars, the subgiant KIC 11026764, exhibits a characteristic pattern of oscillation frequencies suggesting that it has evolved significantly. We have derived asteroseismic estimates of the properties of KIC 11026764 from Kepler photometry combined with ground-based spectroscopic data. We present the results of detailed modeling for this star, employing a variety of independent codes and analyses that attempt to match the asteroseismic and spectroscopic constraints simultaneously. We determine both the radius and the age of KIC 11026764 with a precision near 1%, and an accuracy near 2% for the radius and 15% for the age. Continued observations of this star promise to reveal additional oscillation frequencies that will further improve the determination of its fundamental properties.

  16. AMPLITUDES OF SOLAR-LIKE OSCILLATIONS: CONSTRAINTS FROM RED GIANTS IN OPEN CLUSTERS OBSERVED BY KEPLER

    SciTech Connect (OSTI)

    Stello, Dennis; Huber, Daniel; Bedding, Timothy R.; Benomar, Othman [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006 (Australia); Kallinger, Thomas [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1 (Canada); Basu, Sarbani [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Mosser, BenoIt [LESIA, CNRS, Universite Pierre et Marie Curie, Universite Denis Diderot, Observatoire de Paris, 92195 Meudon (France); Hekker, Saskia [Astronomical Institute 'Anton Pannekoek', University of Amsterdam, P.O. Box 94249, 1090 GE Amsterdam (Netherlands); Mathur, Savita [High Altitude Observatory, NCAR, P.O. Box 3000, Boulder, CO 80307 (United States); GarcIa, Rafael A. [Laboratoire AIM, CEA/DSM-CNRS, Universite Paris 7 Diderot, IRFU/SAp, Centre de Saclay, 91191 Gif-sur-Yvette (France); Kjeldsen, Hans; Grundahl, Frank; Christensen-Dalsgaard, Joergen [Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, 8000 Aarhus C (Denmark); Gilliland, Ronald L. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Verner, Graham A.; Chaplin, William J.; Elsworth, Yvonne P. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); Meibom, Soeren [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Molenda-Zakowicz, Joanna [Instytut Astronomiczny Uniwersytetu Wroclawskiego, ul. Kopernika 11, 51-622 Wroclaw (Poland); Szabo, Robert [Konkoly Observatory of the Hungarian Academy of Sciences, Konkoly Thege Miklos ut 15-17, H-1121 Budapest (Hungary)

    2011-08-10T23:59:59.000Z

    Scaling relations that link asteroseismic quantities to global stellar properties are important for gaining understanding of the intricate physics that underpins stellar pulsations. The common notion that all stars in an open cluster have essentially the same distance, age, and initial composition implies that the stellar parameters can be measured to much higher precision than what is usually achievable for single stars. This makes clusters ideal for exploring the relation between the mode amplitude of solar-like oscillations and the global stellar properties. We have analyzed data obtained with NASA's Kepler space telescope to study solar-like oscillations in 100 red giant stars located in either of the three open clusters, NGC 6791, NGC 6819, and NGC 6811. By fitting the measured amplitudes to predictions from simple scaling relations that depend on luminosity, mass, and effective temperature, we find that the data cannot be described by any power of the luminosity-to-mass ratio as previously assumed. As a result we provide a new improved empirical relation which treats luminosity and mass separately. This relation turns out to also work remarkably well for main-sequence and subgiant stars. In addition, the measured amplitudes reveal the potential presence of a number of previously unknown unresolved binaries in the red clump in NGC 6791 and NGC 6819, pointing to an interesting new application for asteroseismology as a probe into the formation history of open clusters.

  17. THE HABITABILITY AND DETECTION OF EARTH-LIKE PLANETS ORBITING COOL WHITE DWARFS

    SciTech Connect (OSTI)

    Fossati, L.; Haswell, C. A.; Patel, M. R.; Busuttil, R. [Department of Physical Sciences, Open University, Walton Hall, Milton Keynes MK7 6AA (United Kingdom); Bagnulo, S. [Armagh Observatory, College Hill, Armagh BT61 9DG (United Kingdom); Kowalski, P. M. [GFZ German Research Centre for Geosciences, Telegrafenberg, D-14473 Potsdam (Germany); Shulyak, D. V. [Institute of Astrophysics, Georg-August-University, Friedrich-Hund-Platz 1, D-37077 Goettingen (Germany); Sterzik, M. F., E-mail: l.fossati@open.ac.uk, E-mail: C.A.Haswell@open.ac.uk, E-mail: M.R.Patel@open.ac.uk, E-mail: r.busuttil@open.ac.uk, E-mail: sba@arm.ac.uk, E-mail: kowalski@gfz-potsdam.de, E-mail: denis.shulyak@gmail.com, E-mail: msterzik@eso.org [European Southern Observatory, Casilla 19001, Santiago 19 (Chile)

    2012-09-20T23:59:59.000Z

    Since there are several ways planets can survive the giant phase of the host star, we examine the habitability and detection of planets orbiting white dwarfs. As a white dwarf cools from 6000 K to 4000 K, a planet orbiting at 0.01 AU would remain in the continuous habitable zone (CHZ) for {approx}8 Gyr. We show that photosynthetic processes can be sustained on such planets. The DNA-weighted UV radiation dose for an Earth-like planet in the CHZ is less than the maxima encountered on Earth, and hence non-magnetic white dwarfs are compatible with the persistence of complex life. Polarization due to a terrestrial planet in the CHZ of a cool white dwarf (CWD) is 10{sup 2} (10{sup 4}) times larger than it would be in the habitable zone of a typical M-dwarf (Sun-like star). Polarimetry is thus a viable way to detect close-in rocky planets around white dwarfs. Multi-band polarimetry would also allow us to reveal the presence of a planet atmosphere, providing a first characterization. Planets in the CHZ of a 0.6 M{sub Sun} white dwarf will be distorted by Roche geometry, and a Kepler-11d analog would overfill its Roche lobe. With current facilities a super-Earth-sized atmosphereless planet is detectable with polarimetry around the brightest known CWD. Planned future facilities render smaller planets detectable, in particular by increasing the instrumental sensitivity in the blue.

  18. 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)

    2010-06-15T23:59:59.000Z

    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).

  19. Searching for solar-like oscillations in the delta Scuti star rho Puppis

    E-Print Network [OSTI]

    Antoci, V; Grundahl, F; Carrier, F; Brugamyer, E J; Robertson, P; Kjeldsen, H; Kok, Y; Ireland, M; Matthews, J M

    2013-01-01T23:59:59.000Z

    Despite the shallow convective envelopes of delta Scuti pulsators, solar-like oscillations are theoretically predicted to be excited in those stars as well. To search for such stochastic oscillations we organised a spectroscopic multi-site campaign for the bright, metal-rich delta Sct star rho Puppis. We obtained a total of 2763 high-resolution spectra using four telescopes. We discuss the reduction and analysis with the iodine cell technique, developed for searching for low-amplitude radial velocity variations, in the presence of high-amplitude variability. Furthermore, we have determined the angular diameter of rho Puppis to be 1.68 \\pm 0.03 mas, translating into a radius of 3.52 \\pm 0.07Rsun. Using this value, the frequency of maximum power of possible solar-like oscillations, is expected at ~43 \\pm 2 c/d (498 \\pm 23 muHz). The dominant delta Scuti-type pulsation mode of rho Puppis is known to be the radial fundamental mode which allows us to determine the mean density of the star, and therefore an expecte...

  20. 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

    2013-01-01T23:59:59.000Z

    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...

  1. Atmospheric Circulation and Tides of "51Peg b-like" Planets

    E-Print Network [OSTI]

    Adam P. Showman; Tristan Guillot

    2002-02-12T23:59:59.000Z

    We examine the properties of the atmospheres of extrasolar giant planets at orbital distances smaller than 0.1 AU from their stars. We show that these ``51Peg b-like'' planets are rapidly synchronized by tidal interactions, but that small departures from synchronous rotation can occur because of fluid-dynamical torques within these planets. Previous radiative-transfer and evolution models of such planets assume a homogeneous atmosphere. Nevertheless, we show using simple arguments that, at the photosphere, the day-night temperature difference and characteristic wind speeds may reach ~500 K and ~2 km/s, respectively. Substantial departures from chemical equilibrium are expected. The cloud coverage depends sensitively on the dynamics; clouds could exist predominantly either on the dayside or nightside, depending on the circulation regime. Radiative-transfer models that assume homogeneous conditions are therefore inadequate in describing the atmospheric properties of 51Peg b-like planets. We present preliminary three-dimensional, nonlinear simulations of the atmospheric circulation of HD209458b that indicate plausible patterns for the circulation and generally agree with our simpler estimates. Furthermore, we show that kinetic energy production in the atmosphere can lead to the deposition of substantial energy in the interior, with crucial consequences for the evolution of these planets. Future measurements of reflected and thermally-emitted radiation from these planets will help test our ideas.

  2. The habitable zone of Earth-like planets with different levels of atmospheric pressure

    E-Print Network [OSTI]

    Vladilo, Giovanni; Silva, Laura; Provenzale, Antonello; Ferri, Gaia; Ragazzini, Gregorio

    2013-01-01T23:59:59.000Z

    As a contribution to the study of the habitability of extrasolar planets, we implemented a 1-D Energy Balance Model (EBM), the simplest seasonal model of planetary climate, with new prescriptions for most physical quantities. Here we apply our EBM to investigate the surface habitability of planets with an Earth-like atmospheric composition but different levels of surface pressure. The habitability, defined as the mean fraction of the planet's surface on which liquid water could exist, is estimated from the pressure-dependent liquid water temperature range, taking into account seasonal and latitudinal variations of surface temperature. By running several thousands of EBM simulations we generated a map of the habitable zone (HZ) in the plane of the orbital semi-major axis, a, and surface pressure, p, for planets in circular orbits around a Sun-like star. As pressure increases, the HZ becomes broader, with an increase of 0.25 AU in its radial extent from p=1/3 bar to p=3 bar. At low pressure, the habitability is...

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

    E-Print Network [OSTI]

    Abhas Mitra

    1999-09-23T23:59:59.000Z

    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.

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

    SciTech Connect (OSTI)

    Behera, Harihar, E-mail: harihar@theglocaluniversity.in [School of Technology, The Glocal University, Mirzapur Pole, Dist.-Saharanpur, U.P.-247001, India and Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India); Mukhopadhyay, Gautam, E-mail: gmukh@phy.iitb.ac.in [Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India)

    2014-10-06T23:59:59.000Z

    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.

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

    E-Print Network [OSTI]

    Hanif Bayat Movahed; Ramses van Zon; Jeremy Schofield

    2012-03-23T23:59:59.000Z

    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.

  6. GLOBAL MAPPING OF EARTH-LIKE EXOPLANETS FROM SCATTERED LIGHT CURVES

    SciTech Connect (OSTI)

    Kawahara, Hajime [Department of Physics, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397 (Japan); Fujii, Yuka, E-mail: kawa_h@tmu.ac.j [Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)

    2010-09-10T23:59:59.000Z

    Scattered lights from terrestrial exoplanets provide valuable information about their planetary surface. Applying the surface reconstruction method proposed by Fujii et al. to both diurnal and annual variations of scattered light, we develop a reconstruction method of land distribution with both longitudinal and latitudinal resolutions. We find that one can recover a global map of an idealized Earth-like planet on the following assumptions: (1) cloudlessness, (2) a face-on circular orbit, (3) known surface types and their reflectance spectra, (4) lack of atmospheric absorption, (5) known rotation rate, (6) a static map, and (7) the absence of a moon. Using the dependence of light curves on planetary obliquity, we also show that the obliquity can be measured by adopting the {chi}{sup 2} minimization or the extended information criterion. We demonstrate the feasibility of our methodology by applying it to a multi-band photometry of a cloudless model Earth with future space missions such as the occulting ozone observatory (O3). We conclude that future space missions can estimate both the surface distribution and the obliquity at least for cloudless Earth-like planets within 5 pc.

  7. Like-sign dimuon charge asymmetry in the Randall-Sundrum model

    SciTech Connect (OSTI)

    Datta, Alakabha; Duraisamy, Murugeswaran; Khalil, Shaaban [Department of Physics and Astronomy, 108 Lewis Hall, University of Mississippi, Oxford, Mississippi 38677-1848 (United States); Center for Theoretical Physics at the British University in Egypt, Sherouk City, Cairo 11837 (Egypt) and Department of Mathematics, Ain Shams University, Faculty of Science, Cairo, 11566 (Egypt)

    2011-05-01T23:59:59.000Z

    We confirm that in order to account for the recent D0 result of large like-sign dimuon charge asymmetry, a considerable large new physics effect in {Gamma}{sub 12}{sup s} is required in addition to a large CP violating phase in B{sub s}-B{sub s} mixing. In the Randall-Sundrum model of warped geometry, where the fermion fields reside in the bulk, new sources of flavor and CP violation are obtained. We analyze the like-sign dimuon asymmetry in this class of model as an example of the desired new physics. We show that the wrong-charge asymmetry, a{sub sl}{sup s}, which is related to the dimuon asymmetry, is significantly altered compared to the standard model value. However, experimental limits from {Delta}M{sub s}, {Delta}{Gamma}{sub s} as well as K mixing and electroweak corrections constrain it to be greater than a {sigma} away from its experimental average value. This model cannot fully account for the D0 anomaly due to its inability to generate a sufficient new contribution to the width difference {Gamma}{sub 12}{sup s}, even though the model can generate large contribution to the mass difference M{sub 12}{sup s}.

  8. Magnetospheric Eternally Collapsing Objects (MECOs): Likely New Class of Source of Cosmic Particle Acceleration

    E-Print Network [OSTI]

    Abhas Mitra

    2005-07-29T23:59:59.000Z

    It is known that spinning pulsars could be source of VHE-UHE cosmic particle acceleration. It is also conjectured that (fictitious) spinning Black Holes (BH) could be sites of cosmic particle acceleration. However, it has been shown by Mitra and Leiter and Robertson that General Relativity (GR) actually does not allow the existence or formation of finite mass BHs. It was predicted that the BH Candiadates (BHCs) have strong intrinsic magnetic fields (like pulsars) instead of Event Horizons. And this prediction has tentatively been verified in a series of papers by Robertson & Leiter. Thus all observed BH Candidates are actually not BHs, and, they are expected to be MECOs. Stellar mass MECOs are GR analogs of conventionally known isolated pulsars. While pulsars are/have (i) COLD, i.e., not supported by radiation pressure, MECOs are HOT, i.e., supported primarily by trapped radiation pressure, (ii) upper mass limit of 3-4 Msolar MECOs, being HOT, have no Upper Mass Limit, (iii) surface gravitational red shift, z ~ 0.1 -0.2, MECOs have z >> 1 so that photons can remain almost permanently trapped inside them, (iv) magnetic field B > 10^{13} G. It may be recalled that isolated (non- accreting) uncharged BHs are cold and dead objects without any physical activity. On the other hand, isolated spinning MECOs are like extreme GR pulsars.

  9. AP Theory III: Cone-like Graded SUSY, Dynamic Dark Energy and the YM Millenium Problem

    E-Print Network [OSTI]

    Winkelnkemper, H E

    2010-01-01T23:59:59.000Z

    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 perpl...

  10. Mechanical Design and Evaluation of the MP-11-Like Wire Scanner Prototype

    SciTech Connect (OSTI)

    Rodriguez Esparza, Sergio [Los Alamos National Laboratory; Sedillo, James Daniel [Los Alamos National Laboratory; Maestas, Alfred J. [Los Alamos National Laboratory; Gilpatrick, John D. [Los Alamos National Laboratory; Smith, Brian G. [Los Alamos National Laboratory; Raybun, Joseph L. [Los Alamos National Laboratory; Martinez, Jason P. [Los Alamos National Laboratory; Sattler, F. D. [Los Alamos National Laboratory; Gruchalla, Michael E. [Los Alamos National Laboratory

    2012-05-16T23:59:59.000Z

    A wire scanner (WS) is a linearly actuated diagnostic device that uses fiber wires (such as Tungsten or Silicon Carbide) to obtain the position and intensity profile of the proton beam at the Los Alamos Neutron Science Center (LANSCE) particle accelerator. LANSCE will be installing approximately 86 new WS in the near future as part of the LANSCE Risk Mitigation project. These 86 new WS include the replacement of many current WS and some newly added to the current linear accelerator and other beam lines. The reason for the replacement and addition of WS is that many of the existing actuators have parts that are no longer readily available and are difficult to find, thus making maintenance very difficult. One of the main goals is to construct the new WS with as many commercially-available-off-the-shelf components as possible. In addition, faster beam scans (both mechanically and in term of data acquisition) are desired for better operation of the accelerator. This document outlines the mechanical design of the new MP-11-like WS prototype and compares it to a previously built and tested SNS-like WS prototype.

  11. Workshop on diamond and diamond-like-carbon films for the transportation industry

    SciTech Connect (OSTI)

    Nichols, F.A.; Moores, D.K. [eds.

    1993-01-01T23:59:59.000Z

    Applications exist in advanced transportation systems as well as in manufacturing processes that would benefit from superior tribological properties of diamond, diamond-like-carbon and cubic boron nitride coatings. Their superior hardness make them ideal candidates as protective coatings to reduce adhesive, abrasive and erosive wear in advanced diesel engines, gas turbines and spark-ignited engines and in machining and manufacturing tools as well. The high thermal conductivity of diamond also makes it desirable for thermal management not only in tribological applications but also in high-power electronic devices and possibly large braking systems. A workshop has been recently held at Argonne National Laboratory entitled ``Diamond and Diamond-Like-Carbon Films for Transportation Applications`` which was attended by 85 scientists and engineers including top people involved in the basic technology of these films and also representatives from many US industrial companies. A working group on applications endorsed 18 different applications for these films in the transportation area alone. Separate abstracts have been prepared.

  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

    E-Print Network [OSTI]

    Grossmann, Ignacio E.

    Power Forecasting" http://www.nrel.gov/electricity/transmission/western_wind.html #12;Siirola p. 7) Balancing Authorities Operator must balance load and generation at all times Supply demand at lowest Dispatch must match net load Plot reproduced from NREL "Western Wind and Solar Integration Study" http://www.nrel.gov/electricity/transmission/western_wind

  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 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 T = C f 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]

    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 T = C f k2 #12;Target problem - jet-in-crossflow

  15. Malignant hyperthermia-like reaction in a family with a sodium channel mutation at residue 1306

    SciTech Connect (OSTI)

    Vita, G.M.; Jedlicka, A.E.; Levitt, R.C. [Johns Hopkins Medical Institute, Baltimore, MD (United States)] [and others

    1994-09-01T23:59:59.000Z

    Malignant hyperthermia susceptibility (MHS) is an autosomal dominant, hypermetabolic disorder, triggered by potent inhalational anesthetics. We have previously suggeste the skeletal muscle sodium channel {alpha}-subunit (SCN4A) as a gene candidate to explain some forms of MHS. To evaluate this gene for mutations that might lead to a MHS-like episode, we amplified genomic DNA by PCR and used SSCP to screen each exon. We studied multiple MHS families which may be linked to this gene. The proband and a sibling from one of these families suspected of having MHS experienced trismus and body rigidity after induction of anesthesia. The caffiene and halothane contracture test proved diagnostic in these individuals and EMG studies suggested a form of myotomia. A mutation co-segregating with the myotonia/MHS phenotype was found in the region of exon 22.

  16. Orbital and stochastic far-UV variability in the nova-like system V3885 Sgr

    E-Print Network [OSTI]

    Prinja, R K; Richards, M T; Witherick, D K; Peck, L W

    2011-01-01T23:59:59.000Z

    Highly time-resolved time-tagged FUSE satellite spectroscopic data are analysed to establish the far-ultraviolet (FUV) absorption line characteristics of the nova-like cataclysmic variable binary, V3885 Sgr. We determine the temporal behaviour of low (Ly_beta, CIII, NIII) and high (SIV, PV, OVI) ion species, and highlight corresponding orbital phase modulated changes in these lines. On average the absorption troughs are blueshifted due to a low velocity disc wind outflow. Very rapid (~ 5 min) fluctuations in the absorption lines are isolated, which are indicative of stochastic density changes. Doppler tomograms of the FUV lines are calculated which provide evidence for structures where a gas stream interacts with the accretion disc. We conclude that the line depth and velocity changes as a function of orbital phase are consistent with an asymmetry that has its origin in a line-emitting, localised disc-stream interaction region.

  17. Hydrothermal synthesis and infrared emissivity property of flower-like SnO{sub 2} particles

    SciTech Connect (OSTI)

    Tian, J. X. [Institute of Photonics and Photon-Technology, Northwest University, Xi'an 710069 (China) [Institute of Photonics and Photon-Technology, Northwest University, Xi'an 710069 (China); Beijing Institute of Environmental Features, Beijing, 100854 (China); Zhang, Z. Y., E-mail: zhangzy@nwu.edu.cn [Institute of Photonics and Photon-Technology, Northwest University, Xi'an 710069 (China); School of Information Science and Technology, Northwest University, Xi'an 710127 (China); Yan, J. F.; Ruan, X. F.; Yun, J. N.; Zhao, W.; Zhai, C. X. [School of Information Science and Technology, Northwest University, Xi'an 710127 (China)] [School of Information Science and Technology, Northwest University, Xi'an 710127 (China)

    2014-04-15T23:59:59.000Z

    The flower-like SnO{sub 2} particles are synthesized through a simple hydrothermal process. The microstructure, morphology and the infrared emissivity property of the as-prepared products are characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), and infrared spectroradio meter (ISM) respectively. The results show that the as-prepared SnO{sub 2} products are all indexed to tetragonal cassiterite phase of SnO{sub 2}. The different molarity ratios of the OH{sup ?} concentration to Sn{sup 4+} concentration ([OH{sup ?}]:[Sn{sup 4+}]) and the polyacrylamide (PAM) lead to the different morphological structures of SnO{sub 2}, which indicates that both the [OH{sup ?}]:[Sn{sup 4+}] and the PAM play an important role in the morphological evolution respectively. The infrared emissivities of the as-prepared SnO{sub 2} products are discussed.

  18. DC-like Phase Space Manipulation and Particle Acceleration Using Chirped AC Fields

    SciTech Connect (OSTI)

    P.F. Schmit and N.J. Fisch

    2009-06-17T23:59:59.000Z

    Waves in plasmas can accelerate particles that are resonant with the wave. A DC electric field also accelerates particles, but without a resonance discrimination, which makes the acceleration mechanism profoundly different. We investigate the effect on a Hamiltonian distribution of an accelerating potential waveform, which could, for example, represent the average ponderomotive effect of two counterpropagating electromagnetic waves. In particular, we examine the apparent DC-like time-asymptotic response of the distribution in regimes where the potential structure is accelerated adiabatically. A highly resonant population within the distribution is always present, and we characterize its nonadiabatic response during wave-particle resonance using an integral method in the noninertial reference frame moving with the wave. Finally, we show that in the limit of infinitely slow acceleration of the wave, these highly resonant particles disappear and the response

  19. Solution Structure of the Yeast Ubiquitin-Like Modifier Protein Hub1

    SciTech Connect (OSTI)

    Ramelot, Theresa A.(BATTELLE (PACIFIC NW LAB)) [BATTELLE (PACIFIC NW LAB); Cort, John R.(BATTELLE (PACIFIC NW LAB)) [BATTELLE (PACIFIC NW LAB); Yee, Adelinda (Ontario Cancer Institute) [Ontario Cancer Institute; Semsesi, Anthony (University of Toronto) [University of Toronto; Edwards, Aled M.(University of Toronto) [University of Toronto; Arrowsmith, Cheryl H.(9012) [9012; Kennedy, Michael A.(BATTELLE (PACIFIC NW LAB)) [BATTELLE (PACIFIC NW LAB)

    2003-12-01T23:59:59.000Z

    The Hub1 protein from Saccharomyces cerevisiae (NESG ID: YTYst190 / PIR: S78735/ GI: 7493880) is a ubiquitin-like modifier protein (UBL) that is essential for proper cell polarization during the formation of mating projections in S. cerevisiae. Hub1 conjugation to the cell polarity factors Sph1 and Hbt1 was required for their proper subcellular localization (1). Hub1 belongs to a conserved family of eukaryotic proteins. S. cerevisiae and human Hub1 share 65% identity. The sequence identity with ubiquitin is 22%. Here we describe the solution structure of Hub1 determined by NMR spectroscopy. We compare the structure of Hub1 to ubiquitin and find that although the overall fold is almost identical, critical surface residues in ubiquitin are not conserved in Hub1. These differences probably reflect the different functions of the UBL Hub1.

  20. Mechanism of 'GSI oscillations' in electron capture by highly charged hydrogen-like atomic ions

    SciTech Connect (OSTI)

    Krainov, V. P., E-mail: vpkrainov@mail.ru [Moscow Institute of Physics and Technology (Russian Federation)

    2012-07-15T23:59:59.000Z

    We suggest a qualitative explanation of oscillations in electron capture decays of hydrogen-like {sup 140}Pr and {sup 142}Pm ions observed recently in an ion experimental storage ring (ESR) of Gesellschaft fuer Schwerionenforschung (GSI) mbH, Darmstadt, Germany. This explanation is based on the electron multiphoton Rabi oscillations between two Zeeman states of the hyperfine ground level with the total angular momentum F = 1/2. The Zeeman splitting is produced by a constant magnetic field in the ESR. Transitions between these states are produced by the second, sufficiently strong alternating magnetic field that approximates realistic fields in the GSI ESR. The Zeeman splitting amounts to only about 10{sup -5} eV. This allows explaining the observed quantum beats with the period 7 s.

  1. Detecting Sound-Wave-Like Surface Brightness Ripples in Cluster Cores

    E-Print Network [OSTI]

    J. Graham; A. C. Fabian; J. S. Sanders

    2008-08-18T23:59:59.000Z

    We investigate the observational requirements for the detection of sound-wave-like features in galaxy cluster cores. We calculate the effect of projection on the observed wave amplitude, and find that the projection factor depends only weakly on the underlying cluster properties but strongly on the wavelength of the sound waves, with the observed amplitude being reduced by a factor ~5 for 5 kpc waves but only by a factor ~ 2 for 25 kpc waves. We go on to estimate the time needed to detect ripples similar to those previously detected in the Perseus cluster in other clusters. We find that the detection time scales most strongly with the flux of the cluster and the amplitude of the ripples. By connecting the ripple amplitude to the heating power in the system, we estimate detection times for a selection of local clusters and find that several may have ripples detected with ~1Ms Chandra time.

  2. Bloch-like wave dynamics in disordered potentials based on supersymmetry

    E-Print Network [OSTI]

    Yu, Sunkyu; Hong, Jiho; Park, Namkyoo

    2015-01-01T23:59:59.000Z

    Bloch's theorem for the description of waves in crystals was a major milestone, establishing the principle of bandgaps for electrical, optical, and vibrational waves. Although it was once believed that bandgaps could form only under conditions of periodicity and long-range correlations as the prerequisites for Bloch's theorem, this restriction was disproven by the groundbreaking discoveries of amorphous media and quasicrystals. While network and liquid models have been suggested for the interpretation of Bloch-like waves in disordered media, these approaches 'searching' for random networks with bandgaps have failed in the deterministic creation of bandgaps. Here, we reveal a deterministic pathway to bandgap engineering in disordered media, by applying the notion of supersymmetry to the fundamental wave equation. Inspired by the problem for isospectrality, we follow a methodology in stark contrast to previous methods: we 'transform' ordered potentials into disordered potentials while 'preserving' bandgaps. Our...

  3. The eta transition form factor from space- and time-like experimental data

    E-Print Network [OSTI]

    Escribano, R; Sanchez-Puertas, P

    2015-01-01T23:59:59.000Z

    The $\\eta$ transition form factor is analysed for the first time in both space- and time-like regions at low and intermediate energies in a model-independent approach through the use of rational approximants. The $\\eta\\rightarrow e^+e^-\\gamma$ experimental data provided by the A2 Collaboration in the very low energy region of the dilelectron invariant mass distribution allows for the extraction of the most precise up-to-date slope and curvature parameters of the form factors as well as their values at zero and infinity. The impact of these new results on the mixing parameters of the $\\eta$-$\\eta^\\prime$ system, together with the role played by renormalisation dependent effects, and on the determination of the $VP\\gamma$ couplings from $V\\to P\\gamma$ and $P\\to V\\gamma$ radiative decays are also discussed.

  4. Studies of IBL wire bonds operation in a ATLAS-like magnetic field.

    E-Print Network [OSTI]

    Alvarez Feito, D; Mandelli, B

    2015-01-01T23:59:59.000Z

    At the Large Hadron Collider (LHC) experiments, most of silicon detectors use wire bonds to connect front-end chips and sensors to circuit boards for the data and service trans- missions. These wire bonds are operated in strong magnetic field environments and if time varying currents pass through them with frequencies close to their mechanical resonance frequency, strong resonant oscillations may occur. Under certain conditions, this effect can lead to fatigue stress and eventually breakage of wire bonds. During the first LHC Long Shutdown, the ATLAS Pixel Detector has been upgraded with the addition of a fourth innermost layer, the Insertable B-Layer (IBL), which has more than 50000 wire bonds operated in the ATLAS 2 T magnetic field. The results of systematic studies of operating wire bonds under IBL-like conditions are presented. Two different solutions have been investigated to minimize the oscillation amplitude of wire bonds.

  5. Chimera States in a Two-Population Network of Coupled Pendulum-Like Elements

    E-Print Network [OSTI]

    Tassos Bountis; Vasileios G. Kanas; Johanne Hizanidis; Anastasios Bezerianos

    2014-02-20T23:59:59.000Z

    More than a decade ago, a surprising coexistence of synchronous and asynchronous behavior called the chimera state was discovered in networks of nonlocally coupled identical phase oscillators. In later years, chimeras were found to occur in a variety of theoretical and experimental studies of chemical and optical systems, as well as models of neuron dynamics. In this work, we study two coupled populations of pendulum-like elements represented by phase oscillators with a second derivative term multiplied by a mass parameter $m$ and treat the first order derivative terms as dissipation with parameter $\\epsilon>0$. We first present numerical evidence showing that chimeras do exist in this system for small mass values $0

  6. Differential-like Chosen Cipher Attack on A Spatiotemporally Chaotic Cryptosystem

    E-Print Network [OSTI]

    Jiantao Zhou; Wenjiang Pei; Jie Huang; Aiguo Song; Zhenya He

    2005-06-11T23:59:59.000Z

    The combinative applications of one-way coupled map lattice (OCML) and some simple algebraic operations have demonstrated to be able to construct the best known chaotic cryptosystem with high practical security, fast encryption speed, and excellent robustness against channel noise. In this paper, we propose a differential-like chosen cipher attack to break the prototypical system cooperating with INT and MOD operations. This cryptographic method exploits the weakness that the high-dimensional cryptosystem degenerates to be one-dimensional under constant driving, therefore, is no more sensitive to the slight perturbation on the driving after convergence. The experimental results show that this method can successfully extract the key within just hundreds of iterations. To the best of our knowledge, it is the first time to present successful cryptanalysis on such a cryptosystem. we also make some suggestions to improve the security in future versions.

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

    E-Print Network [OSTI]

    Christian Hainzl; Masao Hirokawa; Herbert Spohn

    2003-12-10T23:59:59.000Z

    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.

  8. Friedmann-like collapsing model of a radiating sphere with heat flow

    SciTech Connect (OSTI)

    Kolassis, C.A.; Santos, N.O.; Tsoubelis, D.

    1988-04-01T23:59:59.000Z

    This paper considers a spherical body consisting of a fluid with heat flow which radiates in its exterior a null fluid described by the outgoing Vaidya's metric. A Friedmann-like exact solution of the interior Einstein field equations is given. It is proved that this solution, matched with the outgoing Vaidya matric, represents a physically reasonble collapsing model which, when the heat flow is switched off, reduces to the well-known collapsing model with dust. The proposed model has the remarkable property that even if the heat flow is small, the horizon will never be formed because, before this happens, the collapsing body will be destroyed by opposite gradients of pressure. 6 references.

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

    SciTech Connect (OSTI)

    Dominguez, A.; /Seville U. /IAA, Granada /Madrid, Autonoma U.; Sanchez-Conde, M.A.; /IAC, La Laguna /IAC, La Laguna /KIPAC, Menlo Park /SLAC; Prada, F.; /IAA, Granada

    2012-06-13T23:59:59.000Z

    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.

  10. Axion-like particle imprint in cosmological very-high-energy sources

    SciTech Connect (OSTI)

    Domnguez, A. [Dpto. de FAMN, Universidad de Sevilla, Apdo. Correos 1065, E-41080 Sevilla (Spain); Snchez-Conde, M.A. [Instituto de Astrofisica de Canarias, E-38205 La Laguna, Tenerife (Spain); Prada, F., E-mail: alberto@iaa.es, E-mail: masc@stanford.edu, E-mail: fprada@iaa.es [Instituto de Astrofsica de Andaluca, CSIC, Apdo. Correos 3004, E-18080 Granada (Spain)

    2011-11-01T23:59:59.000Z

    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 ? 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.

  11. Hollow screw like drill in plasma using an intense Laguerre Gaussian laser

    E-Print Network [OSTI]

    Wang, Wenpeng; Zhang, Xiaomei; Zhang, Lingang; Shi, Yin; Xu, Zhizhan

    2014-01-01T23:59:59.000Z

    With the development of ultra intense laser technology, MeV ions from the laser foil interaction have been obtained by different mechanisms, such as target normal sheath acceleration, radiation pressure acceleration, collisionless shock acceleration, breakout afterburner, and a combination of different mechanisms. These energetic ion beams can be applied in fast ignition for inertial confinement fusion, medical therapy, and proton imaging. However, these ions are mainly accelerated in the laser propagation direction, and the ion acceleration in an azimuthal orientation is scarcely mentioned. Here, a doughnut Laguerre Gaussian LG laser is used for the first time to study the laser plasma interaction in the relativistic intensity regime in three dimensional particle in cell simulations. Studies have shown that a novel rotation of the plasma is produced from the hollow screw like drill of a LG mode laser. The angular momentum of the protons in the longitudinal direction produced by the LG laser is remarkably enh...

  12. Theory and simulations of toroidal and rod-like structures in single-molecule DNA condensation

    E-Print Network [OSTI]

    Cortini, Ruggero; Victor, Jean-Marc; Barbi, Maria

    2015-01-01T23:59:59.000Z

    DNA condensation by multivalent cations plays a crucial role in genome packaging in viruses and sperm heads, and has been extensively studied using single-molecule experimental methods. In those experiments, the values of the critical condensation forces have been used to estimate the amplitude of the attractive DNA-DNA interactions. Here, to describe these experiments, we developed an analytical model and a rigid body Langevin dynamics assay to investigate the behavior of a polymer with self-interactions, in the presence of a traction force applied at its extremities. We model self-interactions using a pairwise attractive potential, thereby treating the counterions implicitly. The analytical model allows to accurately predict the equilibrium structures of toroidal and rod-like condensed structures, and the dependence of the critical condensation force on the DNA length. We find that the critical condensation force depends strongly on the length of the DNA, and finite-size effects are important for molecules ...

  13. The unreasonable effectiveness of equilibrium-like theory for interpreting non-equilibrium experiments

    E-Print Network [OSTI]

    R. Dean Astumian

    2005-12-01T23:59:59.000Z

    There has been great interest in applying the results of statistical mechanics to single molecule experiements. Recent work has highlighted so-called non-equilibrium work-energy relations and Fluctuation Theorems which take on an equilibrium-like (time independent) form. Here I give a very simple heuristic example where an equilibrium result (the barometric law for colloidal particles) arises from theory describing the {\\em thermodynamically} non-equilibrium phenomenon of a single colloidal particle falling through solution due to gravity. This simple result arises from the fact that the particle, even while falling, is in {\\em mechanical} equilibrium (gravitational force equal the viscous drag force) at every instant. The results are generalized by appeal to the central limit theorem. The resulting time independent equations that hold for thermodynamically non-equilibrium (and even non-stationary) processes offer great possibilities for rapid determination of thermodynamic parameters from single molecule experiments.

  14. A woman like you: Women scientists and engineers at Brookhaven National Laboratory

    SciTech Connect (OSTI)

    Benkovitz, Carmen; Bernholc, Nicole; Cohen, Anita; Eng, Susan; Enriquez-Leder, Rosario; Franz, Barbara; Gorden, Patricia; Hanson, Louise; Lamble, Geraldine; Martin, Harriet; Mastrangelo, Iris; McLane, Victoria; Villela, Maria-Alicia; Vivirito, Katherine; Woodhead, Avril

    1991-01-01T23:59:59.000Z

    This publication by the women in Science and Engineering introduces career possibilities in science and engineering. It introduces what work and home life are like for women who have already entered these fields. Women at Brookhaven National Laboratory work in a variety of challenging research roles -- from biologist and environmental scientist to safety engineer, from patent lawyer to technician. Brookhaven National Laboratory is a multi-program laboratory which carries out basic and applied research in the physical, biomedical and environmental sciences and in selected energy technologies. The Laboratory is managed by Associated University, Inc., under contract with the US Department of Energy. Brookhaven and the other national laboratories, because of their enormous research resources, can play a critical role in a education and training of the workforce.

  15. A woman like you: Women scientists and engineers at Brookhaven National Laboratory. Careers in action

    SciTech Connect (OSTI)

    Not Available

    1991-12-31T23:59:59.000Z

    This publication by the women in Science and Engineering introduces career possibilities in science and engineering. It introduces what work and home life are like for women who have already entered these fields. Women at Brookhaven National Laboratory work in a variety of challenging research roles -- from biologist and environmental scientist to safety engineer, from patent lawyer to technician. Brookhaven National Laboratory is a multi-program laboratory which carries out basic and applied research in the physical, biomedical and environmental sciences and in selected energy technologies. The Laboratory is managed by Associated University, Inc., under contract with the US Department of Energy. Brookhaven and the other national laboratories, because of their enormous research resources, can play a critical role in a education and training of the workforce.

  16. Experimental Results with the New ITER-like 1 MV SINGAP Accelerator

    SciTech Connect (OSTI)

    Svensson, L.; Esch, H.P.L. de; Hemsworth, R.S.; Massmann, P. [Association EURATOM-CEA, CEA/DSM/DRFC, CEA -Cadarache, 13108 St Paul-lez-Durance (France); Boilson, D. [Association EURATOM-DCU, PRL/NCPST, Glasnevin, Dublin 13 (Ireland)

    2005-04-06T23:59:59.000Z

    A new 'ITER-like' accelerator, which is a scaled down version of the ITER SINGAP (SINgle GAP, SINGle APerture) accelerator, has been built and installed on the Cadarache 1 MV test bed. The objective is to demonstrate reliable D- beam acceleration as close as possible to 1 MeV with a current density j- {approx_equal} 200 A/m2 with the beam optics required for ITER, i.e. a beamlet divergence of {<=}7 mrad and beamlet steering within {+-}2 mrad of that specified. High voltage hold off tests have been performed and 940 kV has been held without breakdowns. The first beams up to 850 keV (D-, 15 A/m2) have been obtained after 4 weeks of experiments and the highest current density that has been obtained so far is 85 A/m2 (D-, 580 keV)

  17. 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

    2012-09-20T23:59:59.000Z

    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.

  18. The High-Z hydrogen-like atom: a model for polarized structure functions

    E-Print Network [OSTI]

    X. Artru; K. Benhizia

    2007-12-05T23:59:59.000Z

    The Dirac equation offers a precise analytical description of relativistic two-particle bound states, when one of the constituent is very heavy and radiative corrections are neglected. Looking at the high-Z hydrogen-like atom in the infinite momentum frame and treating the electron as a "parton", various properties usually attributed to the quark distributions in the nucleon are tested, in particular: Bj{\\o}rken scaling; charge, helicity, transversity and momentum sum rules; existence of the parton sea; Soffer inequality; correlation between spin and transverse momentum (Sivers and Boer-Mulders effects); transverse displacement of the center-of-charge and its connection with the magnetic moment. Deep inelastic experiments with photon or positron beams at MeV energies, analogous to DIS or Drell-Yan reactions, are considered.

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

    E-Print Network [OSTI]

    Jeremy Wolcott; for the MINERvA collaboration

    2015-01-21T23:59:59.000Z

    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.

  20. Measurement of the anomalous like-sign dimuon charge asymmetry with 9 fb? 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.; Aoki, M.; Arov, M.; Askew, A.; sman, B.; Atramentov, O.; Avila, C.; BackusMayes, J.; Badaud, F.; Bagby, L.; Baldin, B.; Bandurin, D. V.; Banerjee, S.; Barberis, E.; Baringer, P.; Barreto, J.; Bartlett, J. F.; Bassler, U.; Bazterra, V.; Beale, S.; Bean, A.; Begalli, M.; Begel, M.; Belanger-Champagne, C.; Bellantoni, L.; Beri, S. B.; Bernardi, G.; Bernhard, R.; Bertram, I.; Besanon, M.; Beuselinck, R.; Bezzubov, V. A.; Bhat, P. C.; Bhatnagar, V.; Blazey, G.; Blessing, S.; Bloom, K.; Boehnlein, A.; Boline, D.; Boos, E. E.; Borissov, G.; Bose, T.; Brandt, A.; Brandt, O.; Brock, R.; Brooijmans, G.; Bross, A.; Brown, D.; Brown, J.; Bu, X. B.; Buehler, M.; Buescher, V.; Bunichev, V.; Burdin, S.; Burnett, T. H.; Buszello, C. P.; Calpas, B.; Camacho-Prez, E.; Carrasco-Lizarraga, M. A.; Casey, B. C. K.; Castilla-Valdez, H.; Chakrabarti, S.; Chakraborty, D.; Chan, K. M.; Chandra, A.; Chen, G.; Chevalier-Thry, S.; Cho, D. K.; Cho, S. W.; Choi, S.; Choudhary, B.; Cihangir, S.; Claes, D.; Clutter, J.; Cooke, M.; Cooper, W. E.; Corcoran, M.; Couderc, F.; Cousinou, M.-C.; Croc, A.; Cutts, D.; Das, A.; Davies, G.; De, K.; de Jong, S. J.; De La Cruz-Burelo, E.; Dliot, F.; Demarteau, M.; Demina, R.; Denisov, D.; Denisov, S. P.; Desai, S.; Deterre, C.; DeVaughan, K.; Diehl, H. T.; Diesburg, M.; Ding, P. F.; Dominguez, A.; Dorland, T.; Dubey, A.; Dudko, L. V.; Duggan, D.; Duperrin, A.; Dutt, S.; Dyshkant, A.; Eads, M.; Edmunds, D.; Ellison, J.; Elvira, V. D.; Enari, Y.; Evans, H.; Evdokimov, A.; Evdokimov, V. N.; Facini, G.; Ferbel, T.; Fiedler, F.; Filthaut, F.; Fisher, W.; Fisk, H. E.; Fortner, M.; Fox, H.; Fuess, S.; Garcia-Bellido, A.; Gavrilov, V.; Gay, P.; Geng, W.; Gerbaudo, D.; Gerber, C. E.; Gershtein, Y.; Ginther, G.; Golovanov, G.; Goussiou, A.; Grannis, P. D.; Greder, S.; Greenlee, H.; Greenwood, Z. D.; Gregores, E. M.; Grenier, G.; Gris, Ph.; Grivaz, J.-F.; Grohsjean, A.; Grnendahl, S.; Grnewald, M. W.; Guillemin, T.; Guo, F.; Gutierrez, G.; Gutierrez, P.; Haas, A.; Hagopian, S.; Haley, J.; Han, L.; Harder, K.; Harel, A.; Hauptman, J. M.; Hays, J.; Head, T.; Hebbeker, T.; Hedin, D.; Hegab, H.; Heinson, A. P.; Heintz, U.; Hensel, C.; Heredia-De La Cruz, I.; Herner, K.; Hesketh, G.; Hildreth, M. D.; Hirosky, R.; Hoang, T.; Hobbs, J. D.; Hoeneisen, B.; Hohlfeld, M.; Hubacek, Z.; Huske, N.; Hynek, V.; Iashvili, I.; Ilchenko, Y.; Illingworth, R.; Ito, A. S.; Jabeen, S.; Jaffr, M.; Jamin, D.; Jayasinghe, A.; Jesik, R.; Johns, K.; Johnson, M.; Johnston, D.; Jonckheere, A.; Jonsson, P.; Joshi, J.; Jung, A. W.; Juste, A.; Kaadze, K.; Kajfasz, E.; Karmanov, D.; Kasper, P. A.; Katsanos, I.; Kehoe, R.; Kermiche, S.; Khalatyan, N.; Khanov, A.; Kharchilava, A.; Kharzheev, Y. N.; Kirby, M. H.; Kohli, J. M.; Kozelov, A. V.; Kraus, J.; Kulikov, S.; Kumar, A.; Kupco, A.; Kur?a, T.; Kuzmin, V. A.; Kvita, J.; Lammers, S.; Landsberg, G.; Lebrun, P.; Lee, H. S.; Lee, S. W.; Lee, W. M.; Lellouch, J.; Li, L.; Li, Q. Z.; Lietti, S. M.; Lim, J. K.; Lincoln, D.; Linnemann, J.; Lipaev, V. V.; Lipton, R.; Liu, Y.; Liu, Z.; Lobodenko, A.; Lokajicek, M.; Lopes de Sa, R.; Lubatti, H. J.; Luna-Garcia, R.; Lyon, A. L.; Maciel, A. K. A.; Mackin, D.; Madar, R.; Magaa-Villalba, R.; Malik, S.; Malyshev, V. L.; Maravin, Y.; Martnez-Ortega, J.; McCarthy, R.; McGivern, C. L.; Meijer, M. M.; Melnitchouk, A.; Menezes, D.; Mercadante, P. G.; Merkin, M.; Meyer, A.; Meyer, J.; Miconi, F.; Mondal, N. K.; Muanza, G. S.; Mulhearn, M.; Nagy, E.; Naimuddin, M.; Narain, M.; Nayyar, R.; Neal, H. A.; Negret, J. P.; Neustroev, P.; Novaes, S. F.; Nunnemann, T.; Obrant, G.; Orduna, J.; Osman, N.; Osta, J.; Otero y Garzn, G. J.; Padilla, M.; Pal, A.; Parashar, N.; Parihar, V.; Park, S. K.; Parsons, J.; Partridge, R.; Parua, N.; Patwa, A.; Penning, B.; Perfilov, M.; Peters, K.; Peters, Y.; Petridis, K.; Petrillo, G.; Ptroff, P.; Piegaia, R.; Pleier, M.-A.; Podesta-Lerma, P. L. M.; Podstavkov, V. M.; Polozov, P.; Popov, A. V.; Prewitt, M.; Price, D.; Prokopenko, N.; Protopopescu, S.; Qian, J.; Quadt, A.; Quinn, B.; Rangel, M. S.; Ranjan, K.; Ratoff, P. N.; Razumov, I.; Renkel, P.; Rijssenbeek, M.; Ripp-Baudot, I.; Rizatdinova, F.; Rominsky, M.; Ross, A.; Royon, C.; Rubinov, P.; Ruchti, R.; Safronov, G.; Sajot, G.; Salcido, P.; Snchez-Hernndez, A.; Sanders, M. P.; Sanghi, B.; Santos, A. S.; Savage, G.; Sawyer, L.; Scanlon, T.; Schamberger, R. D.; Scheglov, Y.; Schellman, H.; Schliephake, T.; Schlobohm, S.; Schwanenberger, C.; Schwienhorst, R.; Sekaric, J.; Severini, H.; Shabalina, E.; Shary, V.; Shchukin, A. A.; Shivpuri, R. K.; Simak, V.; Sirotenko, V.; Skubic, P.; Slattery, P.; Smirnov, D.; Smith, K. J.

    2011-09-01T23:59:59.000Z

    We present an updated measurement of the anomalous like-sign dimuon charge asymmetry Absl for semileptonic b-hadron decays in 9.0 fb? 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=(-0.7870.172(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.

  1. Pragmatic SAE procedure in the Schrodinger equation for the inverse-square-like potentials

    E-Print Network [OSTI]

    Nadareishvili, Teimuraz

    2012-01-01T23:59:59.000Z

    The Self-Adjoint Extension in the Schrodinger equation for potentials behaved as an attractive inverse square at the origin is critically reviewed. Original results are also presented. It is shown that the additional non-regular solutions must be retained for definite interval of parameters, which requires a necessity of performing a Self-Adjoint Extension (SAE) procedure of radial Hamiltonian.The Pragmatic approach is used and some of its consequences are considered for wide class of transitive potentials. Our consideration is based on the established earlier by us a boundary condition for the radial wave function and the corresponding consequences are derived. Various relevant applications are presented as well. They are: inverse square potential in the Schrodinger equation is solved when the additional non-regular solution is retained. Valence electron model and the Klein-Gordon equation with the Coulomb potential is considered and the hydrino -like levels are discussed.

  2. Pragmatic SAE procedure in the Schrodinger equation for the inverse-square-like potentials

    E-Print Network [OSTI]

    Teimuraz Nadareishvili; Anzor Khelashvili

    2012-10-14T23:59:59.000Z

    The Self-Adjoint Extension in the Schrodinger equation for potentials behaved as an attractive inverse square at the origin is critically reviewed. Original results are also presented. It is shown that the additional non-regular solutions must be retained for definite interval of parameters, which requires a necessity of performing a Self-Adjoint Extension (SAE) procedure of radial Hamiltonian.The Pragmatic approach is used and some of its consequences are considered for wide class of transitive potentials. Our consideration is based on the established earlier by us a boundary condition for the radial wave function and the corresponding consequences are derived. Various relevant applications are presented as well. They are: inverse square potential in the Schrodinger equation is solved when the additional non-regular solution is retained. Valence electron model and the Klein-Gordon equation with the Coulomb potential is considered and the hydrino -like levels are discussed.

  3. QU Car: a very high luminosity nova-like binary with a carbon-enriched companion

    E-Print Network [OSTI]

    J. E. Drew; L. E. Hartley; K. S. Long; J. van der Walt

    2002-09-16T23:59:59.000Z

    QU Car is listed in cataclysmic variable star catalogues as a nova-like variable. This little-studied, yet bright interacting binary is re-appraised here in the light of new high-quality ultraviolet (UV) interstellar line data obtained with STIS on board the Hubble Space Telescope. The detection of a component of interstellar absorption at a mean LSR velocity of $-$14 km s$^{-1}$ indicates that the distance to QU Car may be $\\sim$2 kpc or more -- a considerable increase on the previous lower-limiting distance of 500 pc. If so, the bolometric luminosity of QU Car could exceed $10^{37}$ ergs s$^{-1}$. This would place this binary in the luminosity domain occupied by known compact-binary supersoft X-ray sources. Even at a 500 pc, QU Car appears to be the most luminous nova-like variable known. New intermediate dispersion optical spectroscopy of QU Car spanning 3800--7000 \\AA is presented. These data yield the discovery that C{\\sc iv} $\\lambda\\lambda$5801,12 is present as an unusually prominent emission line in an otherwise low-contrast line spectrum. Using measurements of this and other lines in a recombination line analysis, it is shown that the C/He abundance as proxied by the n(C$^{4+}$)/n(He$^{2+}$) ratio may be as high as 0.06 (an order of magnitude higher than the solar ratio). Furthermore, the C/O abundance ratio is estimated to be greater than 1. These findings suggest that the companion in QU Car is a carbon star. If so, it would be the first example of a carbon star in such a binary. An early-type R star best matches the required abundance pattern and could escape detection at optical wavelengths provided the distance to QU Car is $\\sim$2 kpc or more.

  4. THE HABITABLE ZONE OF EARTH-LIKE PLANETS WITH DIFFERENT LEVELS OF ATMOSPHERIC PRESSURE

    SciTech Connect (OSTI)

    Vladilo, Giovanni; Murante, Giuseppe; Silva, Laura [INAF-Trieste Astronomical Observatory, Trieste (Italy)] [INAF-Trieste Astronomical Observatory, Trieste (Italy); Provenzale, Antonello [Institute of Atmospheric Sciences and Climate-CNR, Torino (Italy)] [Institute of Atmospheric Sciences and Climate-CNR, Torino (Italy); Ferri, Gaia; Ragazzini, Gregorio, E-mail: vladilo@oats.inaf.it [Department of Physics, University of Trieste, Trieste (Italy)] [Department of Physics, University of Trieste, Trieste (Italy)

    2013-04-10T23:59:59.000Z

    As a contribution to the study of the habitability of extrasolar planets, we implemented a one-dimensional energy balance model (EBM), the simplest seasonal model of planetary climate, with new prescriptions for most physical quantities. Here we apply our EBM to investigate the surface habitability of planets with an Earth-like atmospheric composition but different levels of surface pressure. The habitability, defined as the mean fraction of the planet's surface on which liquid water could exist, is estimated from the pressure-dependent liquid water temperature range, taking into account seasonal and latitudinal variations of surface temperature. By running several thousands of EBM simulations we generated a map of the habitable zone (HZ) in the plane of the orbital semi-major axis, a, and surface pressure, p, for planets in circular orbits around a Sun-like star. As pressure increases, the HZ becomes broader, with an increase of 0.25 AU in its radial extent from p = 1/3 to 3 bar. At low pressure, the habitability is low and varies with a; at high pressure, the habitability is high and relatively constant inside the HZ. We interpret these results in terms of the pressure dependence of the greenhouse effect, the efficiency of horizontal heat transport, and the extent of the liquid water temperature range. Within the limits discussed in the paper, the results can be extended to planets in eccentric orbits around non-solar-type stars. The main characteristics of the pressure-dependent HZ are modestly affected by variations of planetary properties, particularly at high pressure.

  5. Zero point quantum fluctuations in a de-Sitter like background

    E-Print Network [OSTI]

    Haidar Sheikhahmadi; Ali Aghamohammadi; Khaled Saaidi

    2015-02-18T23:59:59.000Z

    In this work, zero point quantum fluctuations for both massive and massless scalar fields in de-Sitter like space will be investigated. As a general case, by means of massive scalar field and using the observed value for spectral index $n_s(k)$ (which was obtained from Planck $2013$ data set) the best value of first slow roll parameter, $\\epsilon$, will be obtained. And as typical case we will consider the massless scalar field which in asymptotically flat space time usually has important role to compare the observed values and theoretical results. The role of variation of Hubble parameter in a de-Sitter like model to estimate the power spectrum and also the ratio of dark energy on critical energy density will be regarded. In this model, the energy density of vacuum quantum fluctuations will be obtained, then the effect of such quantity on other components of the Universe i.e. the matter and cosmological constant energy densities is studied. By solving the conservation equation of energy density, different components of energy density of the Universe will be obtained. In the case, in which all components of the Universe have interaction, the different dissipation functions, $\\tilde{Q}_{i}$, are considered. The time evolution of ${\\rho_{DE}(z)}/{\\rho_{cri}(z)}$ shows that $\\tilde{Q}=3 \\gamma H(t) \\rho_{m}$ has best agreement in comparison with observational data set includes of CMB, BAO and SNeIa data. By the way, it will be found out that $\\tilde{Q}=3 \\kappa H(t) \\rho_{\\Lambda}$ does not any physical results.

  6. Instanton Induced Neutrino Majorana Masses in CFT Orientifolds with MSSM-like spectra

    E-Print Network [OSTI]

    L. E. Ibanez; A. N. Schellekens; A. M. Uranga

    2007-04-25T23:59:59.000Z

    Recently it has been shown that string instanton effects may give rise to neutrino Majorana masses in certain classes of semi-realistic string compactifications. In this paper we make a systematic search for supersymmetric MSSM-like Type II Gepner orientifold constructions admitting boundary states associated with instantons giving rise to neutrino Majorana masses and other L- and/or B-violating operators. We analyze the zero mode structure of D-brane instantons on general type II orientifold compactifications, and show that only instantons with O(1) symmetry can have just the two zero modes required to contribute to the 4d superpotential. We however discuss how the addition of fluxes and/or possible non-perturbative extensions of the orientifold compactifications would allow also instantons with $Sp(2)$ and U(1) symmetries to generate such superpotentials. In the context of Gepner orientifolds with MSSM-like spectra, we find no models with O(1) instantons with just the required zero modes to generate a neutrino mass superpotential. On the other hand we find a number of models in one particular orientifold of the Gepner model $(2,4,22,22)$ with $Sp(2)$ instantons with a few extra uncharged non-chiral zero modes which could be easily lifted by the mentioned effects. A few more orientifold examples are also found under less stringent constraints on the zero modes. This class of $Sp(2)$ instantons have the interesting property that R-parity conservation is automatic and the flavour structure of the neutrino Majorana mass matrices has a simple factorized form.

  7. AP Theory III: Cone-like Graded SUSY, Dynamic Dark Energy and the YM Millenium Problem

    E-Print Network [OSTI]

    H. E. Winkelnkemper

    2010-03-26T23:59:59.000Z

    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.

  8. Change in Hamiltonian General Relativity from the Lack of a Time-like Killing Vector Field

    E-Print Network [OSTI]

    J. Brian Pitts

    2014-06-07T23:59:59.000Z

    In General Relativity in Hamiltonian form, change has seemed to be missing, defined only asymptotically, or otherwise obscured at best, because the Hamiltonian is a sum of first-class constraints and a boundary term and thus supposedly generates gauge transformations. Attention to the gauge generator G of Rosenfeld, Anderson, Bergmann, Castellani et al., a specially tuned sum of first-class constraints, facilitates seeing that a solitary first-class constraint in fact generates not a gauge transformation, but a bad physical change in electromagnetism (changing E) or GR. The change spoils the Lagrangian constraints in terms of the physically relevant velocities rather than auxiliary canonical momenta. While Maudlin has defended change in GR much as G. E. Moore resisted skepticism, there remains a need to exhibit the technical flaws in the argument. Insistence on Hamiltonian-Lagrangian equivalence, a theme emphasized by Mukunda, Castellani, Sugano, Pons, Salisbury, Shepley and Sundermeyer among others, holds the key. Taking objective change to be ineliminable time dependence, there is change in vacuum GR just in case there is no time-like vector field satisfying Killing's equation. Throwing away the spatial dependence of GR for convenience, one finds that the time evolution from Hamilton's equations is real change just when there is no time-like Killing vector. Hence change is real and local even in the Hamiltonian formalism. The considerations here resolve the Earman-Maudlin standoff: the Hamiltonian formalism is helpful, and, suitably reformed, it does not have absurd consequences for change. Hence the classical problem of time is resolved, apart from the issue of observables, for which the solution is outlined. The quantum problem of time, however, is not automatically resolved due to issues of quantum constraint imposition.

  9. Physicochemical characterization of PEG-based comb-like amphiphilic copolymer structures for possible imaging and therapeutic applications

    E-Print Network [OSTI]

    Dawson, Jin Zhou

    2008-01-01T23:59:59.000Z

    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 ...

  10. Adult equine bone-marrow stromal cells produce a cartilage-like ECM superior to animal-matched adult chondrocytes

    E-Print Network [OSTI]

    Kisiday, John D.

    Our objective was to evaluate the age-dependent mechanical phenotype of bone marrow stromal cell- (BMSC-) and chondrocyte-produced cartilage-like neo-tissue and to elucidate the matrix-associated mechanisms which generate ...

  11. BUSINESS ANALYTICS CONCENTRATION FOR UNDERGRADUATES The business analytics concentration, like a major, focuses on using information to develop business

    E-Print Network [OSTI]

    Salama, Khaled

    their business models. Possible Job Titles Data scientist, business analytics specialist, customer relationshipBUSINESS ANALYTICS CONCENTRATION FOR UNDERGRADUATES The business analytics concentration, like a major, focuses on using information to develop business insights and influence decision

  12. A Bug You Like: A Framework for Automated Assignment of Bugs Olga Baysal Michael W. Godfrey Robin Cohen

    E-Print Network [OSTI]

    Godfrey, Michael W.

    A Bug You Like: A Framework for Automated Assignment of Bugs Olga Baysal Michael W. Godfrey Robin to determine appropriate experts to work on given elements of software projects. Unlike this previous work

  13. 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

    2012-01-01T23:59:59.000Z

    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, ...

  14. Spatially resolved measurements of kinematics and flow-induced birefringence in worm-like micellar solutions undergoing high rate deformations

    E-Print Network [OSTI]

    Ober, Thomas J. (Thomas Joseph)

    2010-01-01T23:59:59.000Z

    Worm-like micellar solutions are model non-Newtonian systems on account of their well understood linear viscoelastic behavior. Their high deformation rate, non-linear rheological response, however, remains inadequately ...

  15. Short pulse laser-induced optical damage and fracto-emission of amorphous, diamond-like carbon

    SciTech Connect (OSTI)

    SOKOLOWSKI-TINTEN,K.; VON DER LINDE,D.; SIEGAL,MICHAEL P.; OVERMYER,DONALD L.

    2000-02-07T23:59:59.000Z

    Short pulse laser damage and ablation of amorphous, diamond-like carbon films is investigated. Material removal is due to fracture of the film and ejection of large fragments, which exhibit a broadband emission of microsecond duration.

  16. activity and diversity of particle-emitting orga-nisms seem likely to play important roles in Earth

    E-Print Network [OSTI]

    activity and diversity of particle-emitting orga- nisms seem likely to play important roles at BESSY II. We thank the Instituto Nacional de Pesquisas da Amaznia (INPA), Manaus, and the ATTO team

  17. 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. [National Center for Scientific Research Demokritos, 15310 Athens (Greece)] [National Center for Scientific Research Demokritos, 15310 Athens (Greece); Grazianetti, C.; Fanciulli, M. [Laboratorio MDM, IMM-CNR, I-20864, Agrate Brianza (MB) (Italy) [Laboratorio MDM, IMM-CNR, I-20864, Agrate Brianza (MB) (Italy); Dipartimento di Scienza dei Materiali, Universit degli Studi di Milano Bicocca, I-20126, Milano (Italy); Chiappe, D.; Molle, A. [Laboratorio MDM, IMM-CNR, I-20864, Agrate Brianza (MB) (Italy)] [Laboratorio MDM, IMM-CNR, I-20864, Agrate Brianza (MB) (Italy)

    2013-12-16T23:59:59.000Z

    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.

  18. Interaction of osteoblast-like cells with serum and fibronectin: effects on cell motility and proliferation in vitro

    SciTech Connect (OSTI)

    Zuk, A.

    1986-01-01T23:59:59.000Z

    Osteoblast migration and proliferation are believed to occur during bone remodelling, in particular after osteoclastic bone resorption and prior to osteoblastic bone formation. In order to study migration and proliferation in vitro, the model of Alessandri et al. (1983) was modified. The model entailed seeding osteoblast-like cells into wells cut in agar and quantifying migration and proliferation peripheral to the well. Cell morphology also was described. The data indicated that on growth surfaces enriched with varying concentrations of fetal calf serum (FSC), the quantification of migration and proliferation was related both to percent cell attachment and to FCS-concentration. Because few osteoblast-like cells incorporated (/sup 3/H-TdR), it was concluded that the appearance of cells peripheral to the well was due to migration, and not to proliferation. Cell morphology and myosin distribution and organization indicated that osteoblast-like cells at the periphery of the cell culture (i.e. leading edge) may have been directionally migrating whereas cells behind the leading edge may have been engaged in non-directional migration. The migration, proliferation, and morphology of osteoblast-like cells cultured on fibronectin (FN) enriched growth surfaces also was examined. The quantification of migration and proliferation was related to the FN-concentration applied to the growth surface. Because few osteoblast-like cells incorporated /sup 3/H-TdR and cell morphology indicated migration, it was concluded that osteoblast-like cells on FN-enriched growth surfaces are specialized, in part, for migration.

  19. Insulin-like growth factor 1 enhances the migratory capacity of mesenchymal stem cells

    SciTech Connect (OSTI)

    Li, Yangxin [Laboratory of Heart Failure and Stem Cell, Texas Heart Institute, Houston, TX 77030 (United States)]. E-mail: Yangxin_li@yahoo.com; Yu, XiYong [Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Provincial Cardiovascular Institute, Guanzhou, Guandong 510080 (China)]. E-mail: yuxycn@hotmail.com; Lin, ShuGuang [Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Provincial Cardiovascular Institute, Guanzhou, Guandong 510080 (China); Li, XiaoHong [Research Center of Medical Sciences, Guangdong Provincial People's Hospital, Guangdong Provincial Cardiovascular Institute, Guanzhou, Guandong 510080 (China); Zhang, Saidan [Section of Cardiology, Xiangya Hospital of Central-South University, Changsha, Hunan 410008 (China); Song, Yao-Hua [Department of Molecular Pathology, University of Texas M.D. Anderson Cancer Center, Houston, TX 77030 (United States)

    2007-05-11T23:59:59.000Z

    Mesenchymal stem cells (MSCs) are attractive candidates for cell based therapies. However, the mechanisms responsible for stem cell migration and homing after transplantation remain unknown. It has been shown that insulin-like growth factor-1 (IGF-1) induces proliferation and migration of some cell types, but its effects on stem cells have not been investigated. We isolated and cultured MSC from rat bone marrow, and found that IGF-1 increased the expression levels of the chemokine receptor CXCR4 (receptor for stromal cell-derived factor-1, SDF-1). Moreover, IGF-1 markedly increased the migratory response of MSC to SDF-1. The IGF-1-induced increase in MSC migration in response to SDF-1 was attenuated by PI3 kinase inhibitor (LY294002 and wortmannin) but not by mitogen-activated protein/ERK kinase inhibitor PD98059. Our data indicate that IGF-1 increases MSC migratory responses via CXCR4 chemokine receptor signaling which is PI3/Akt dependent. These findings provide a new paradigm for biological effects of IGF-1 on MSC and have implications for the development of novel stem cell therapeutic strategies.

  20. Hydrodynamic interactions in metal rod-like particle suspensions due to induced charge electroosmosis

    SciTech Connect (OSTI)

    Rose, K A; Hoffman, B; Saintillan, D; Shaqfeh, E G; Santiago, J G

    2008-05-05T23:59:59.000Z

    We present a theoretical and experimental study of the role of hydrodynamic interactions on the motion and dispersion of metal rod-like particles in the presence of an externally applied electric field. In these systems, the electric field polarizes the particles and induces an electroosmosis flow relative to the surface of each particle. The simulations include the effect of the gravitational body force, buoyancy, far-field hydrodynamic interactions, near-field lubrication forces, and electric field interactions. The particles in the simulations and experiments were observed to experience repeated pairing interactions in which they come together axially with their ends approaching each other, slide past one another until their centers approach, and then push apart. These interactions were confirmed in measurements of particle orientations and velocities, pair distribution functions, and net dispersion of the suspension. For large electric fields, the pair distribution functions show accumulation and depletion regions consistent with many pairing events. For particle concentrations of 1e8 particles/mL and higher, dispersion within the suspension dramatically increases with increased field strength.

  1. DETECTION OF SOLAR-LIKE OSCILLATIONS FROM KEPLER PHOTOMETRY OF THE OPEN CLUSTER NGC 6819

    SciTech Connect (OSTI)

    Stello, Dennis; Bedding, Timothy R.; Huber, Daniel [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006 (Australia); Basu, Sarbani [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Bruntt, Hans; Mosser, BenoIt; Barban, Caroline; Goupil, Marie-Jo [LESIA, CNRS, Universite Pierre et Marie Curie, Universite Denis Diderot, Observatoire de Paris, 92195 Meudon (France); Stevens, Ian R.; Chaplin, William J.; Elsworth, Yvonne P.; Hekker, Saskia [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); Brown, Timothy M. [Las Cumbres Observatory Global Telescope, Goleta, CA 93117 (United States); Christensen-Dalsgaard, Joergen; Kjeldsen, Hans; Arentoft, Torben [Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C (Denmark); Gilliland, Ronald L. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Ballot, Jerome [Laboratoire d'Astrophysique de Toulouse-Tarbes, Universite de Toulouse, CNRS, 14 av E. Belin, 31400 Toulouse (France); GarcIa, Rafael A. [Laboratoire AIM, CEA/DSM-CNRS, Universite Paris 7 Diderot, IRFU/SAp, Centre de Saclay, 91191 Gif-sur-Yvette (France); Mathur, Savita [Indian Institute of Astrophysics, Koramangala, Bangalore 560 034 (India)] (and others)

    2010-04-20T23:59:59.000Z

    Asteroseismology of stars in clusters has been a long-sought goal because the assumption of a common age, distance, and initial chemical composition allows strong tests of the theory of stellar evolution. We report results from the first 34 days of science data from the Kepler Mission for the open cluster NGC 6819-one of the four clusters in the field of view. We obtain the first clear detections of solar-like oscillations in the cluster red giants and are able to measure the large frequency separation, {delta}{nu}, and the frequency of maximum oscillation power, {nu}{sub max}. We find that the asteroseismic parameters allow us to test cluster membership of the stars, and even with the limited seismic data in hand, we can already identify four possible non-members despite their having a better than 80% membership probability from radial velocity measurements. We are also able to determine the oscillation amplitudes for stars that span about 2 orders of magnitude in luminosity and find good agreement with the prediction that oscillation amplitudes scale as the luminosity to the power of 0.7. These early results demonstrate the unique potential of asteroseismology of the stellar clusters observed by Kepler.

  2. CALIBRATING CONVECTIVE PROPERTIES OF SOLAR-LIKE STARS IN THE KEPLER FIELD OF VIEW

    SciTech Connect (OSTI)

    Bonaca, Ana; Tanner, Joel D.; Basu, Sarbani [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Chaplin, William J.; Metcalfe, Travis S.; Christensen-Dalsgaard, Jorgen; Garcia, Rafael A.; Mathur, Savita [Kavli Institute for Theoretical Physics, Kohn Hall, University of California, Santa Barbara, CA 93106 (United States); Monteiro, Mario J. P. F. G.; Campante, Tiago L. [Centro de Astrofisica and Faculdade de Ciencias, Universidade do Porto, Rua das Estrelas, 4150-762 Porto (Portugal); Ballot, Jerome [CNRS, Institut de Recherche en Astrophysique et Planetologie, 14 avenue Edouard Belin, F-31400 Toulouse (France); Bedding, Timothy R.; Corsaro, Enrico [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006 (Australia); Bonanno, Alfio [INAF-Osservatorio Astrofisico di Catania, Via S.Sofia 78, I-95123 Catania (Italy); Broomhall, Anne-Marie; Elsworth, Yvonne [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT (United Kingdom); Bruntt, Hans; Karoff, Christoffer; Kjeldsen, Hans [Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark); Hekker, Saskia, E-mail: ana.bonaca@yale.edu, E-mail: sarbani.basu@yale.edu, E-mail: joel.tanner@yale.edu [Astronomical Institute Anton Pannekoek, University of Amsterdam, Science Park 904, 1098-XH Amsterdam (Netherlands); and others

    2012-08-10T23:59:59.000Z

    Stellar models generally use simple parameterizations to treat convection. The most widely used parameterization is the so-called mixing-length theory where the convective eddy sizes are described using a single number, {alpha}, the mixing-length parameter. This is a free parameter, and the general practice is to calibrate {alpha} using the known properties of the Sun and apply that to all stars. Using data from NASA's Kepler mission we show that using the solar-calibrated {alpha} is not always appropriate, and that in many cases it would lead to estimates of initial helium abundances that are lower than the primordial helium abundance. Kepler data allow us to calibrate {alpha} for many other stars and we show that for the sample of stars we have studied, the mixing-length parameter is generally lower than the solar value. We studied the correlation between {alpha} and stellar properties, and we find that {alpha} increases with metallicity. We therefore conclude that results obtained by fitting stellar models or by using population-synthesis models constructed with solar values of {alpha} are likely to have large systematic errors. Our results also confirm theoretical expectations that the mixing-length parameter should vary with stellar properties.

  3. 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

    2011-02-07T23:59:59.000Z

    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.

  4. Some Quantum-Like Features of Mass Politics in Two-Party Systems

    E-Print Network [OSTI]

    Charles E. Smith Jr.; Christopher Zorn

    2011-07-05T23:59:59.000Z

    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.

  5. Alarin but not its alternative-splicing form, GALP (Galanin-like peptide) has antimicrobial activity

    SciTech Connect (OSTI)

    Wada, Akihiro, E-mail: a-wada@nagasaki-u.ac.jp [Department of Bacteriology, Institute of Tropical Medicine, Nagasaki University, Nagasaki 8528523 (Japan)] [Department of Bacteriology, Institute of Tropical Medicine, Nagasaki University, Nagasaki 8528523 (Japan); Wong, Pooi-Fong [Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur (Malaysia)] [Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur (Malaysia); Hojo, Hironobu [Department of Applied Biochemistry, Institute of Glycoscience, Tokai University, Kanagawa 2591292 (Japan)] [Department of Applied Biochemistry, Institute of Glycoscience, Tokai University, Kanagawa 2591292 (Japan); Hasegawa, Makoto [Department of Bioscience, Faculty of Bioscience, Nagahama Institute of Bio-Science and Technology, Shiga 5260829 (Japan)] [Department of Bioscience, Faculty of Bioscience, Nagahama Institute of Bio-Science and Technology, Shiga 5260829 (Japan); Ichinose, Akitoyo [Electron Microscopy Shop Central Laboratory, Institute of Tropical Medicine, Nagasaki University, Nagasaki 8528523 (Japan)] [Electron Microscopy Shop Central Laboratory, Institute of Tropical Medicine, Nagasaki University, Nagasaki 8528523 (Japan); Llanes, Rafael [Institute Pedro Kouri, Havana (Cuba)] [Institute Pedro Kouri, Havana (Cuba); Kubo, Yoshinao [Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 8528523 (Japan)] [Division of Cytokine Signaling, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 8528523 (Japan); Senba, Masachika [Department of Pathology, Institute of Tropical Medicine, Nagasaki University, Nagasaki 8528523 (Japan)] [Department of Pathology, Institute of Tropical Medicine, Nagasaki University, Nagasaki 8528523 (Japan); Ichinose, Yoshio [Kenya Research Station, Institute of Tropical Medicine, Nagasaki University, Nagasaki 8528523 (Japan)] [Kenya Research Station, Institute of Tropical Medicine, Nagasaki University, Nagasaki 8528523 (Japan)

    2013-05-03T23:59:59.000Z

    Highlights: Alarin inhibits the growth of E. coli but not S. aureus. Alarins potency is comparable to LL-37 in inhibiting the growth of E. coli. Alarin can cause bacterial membrane blebbing. Alalin does not induce hemolysis on erythrocytes. -- Abstract: Alarin is an alternative-splicing form of GALP (galanin-like peptide). It shares only 5 conserved amino acids at the N-terminal region with GALP which is involved in a diverse range of normal brain functions. This study seeks to investigate whether alarin has additional functions due to its differences from GALP. Here, we have shown using a radial diffusion assay that alarin but not GALP inhibited the growth of Escherichia coli (strain ML-35). The conserved N-terminal region, however, remained essential for the antimicrobial activity of alarin as truncated peptides showed reduced killing effect. Moreover, alarin inhibited the growth of E. coli in a similar potency as human cathelicidin LL-37, a well-studied antimicrobial peptide. Electron microscopy further showed that alarin induced bacterial membrane blebbing but unlike LL-37, it did not cause hemolysis of erythrocytes. In addition, alarin is only active against the gram-negative bacteria, E. coli but not the gram-positive bacteria, Staphylococcus aureus. Thus, these data suggest that alarin has potentials as an antimicrobial and should be considered for the development in human therapeutics.

  6. Preparations and characterizations of novel graphite-like materials and some high oxidation state fluorine chemistry

    SciTech Connect (OSTI)

    Shen, Ciping

    1992-11-01T23:59:59.000Z

    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.

  7. 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); Ptterich, T.; Bobkov, V. [Max-Planck-Institut fr 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 fr Plasmaphysik, EURATOM-Assoziation, Garching (Germany); Collaboration: JET-EFDA Contributors

    2014-02-12T23:59:59.000Z

    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.

  8. Radio-loud Magnetars as Detectors for Axions and Axion-like Particles

    E-Print Network [OSTI]

    Doron Chelouche; Eduardo I. Guendelman

    2012-02-01T23:59:59.000Z

    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.

  9. 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

    2015-01-01T23:59:59.000Z

    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 0.5 to 2 (Binzel et al., 2004; Dandy et al., 2003). Therefore, Q-t...

  10. 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)

    2014-01-01T23:59:59.000Z

    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%.

  11. The role of dynamics on the habitability of an Earth-like planet

    E-Print Network [OSTI]

    Pilat-Lohinger, E

    2015-01-01T23:59:59.000Z

    From the numerous detected planets outside the Solar system, no terrestrial planet comparable to our Earth has been discovered so far. The search for an Exo-Earth is certainly a big challenge which may require the detections of planetary systems resembling our Solar system in order to find life like on Earth. However, even if we find Solar system analogues, it is not certain that a planet in Earth position will have similar circumstances as those of Earth. Small changes in the architecture of the giant planets can lead to orbital perturbations which may change the conditions of habitability for a terrestrial planet in the habitable zone (HZ). We present a numerical investigation where we first study the motion of test-planets in a particular Jupiter-Saturn configuration for which we can expect strong gravitational perturbations on the motion at Earth position according to a previous work. In this study, we show that these strong perturbations can be reduced significantly by the neighboring planets of Earth. I...

  12. Quantum entanglement for two electrons in the excited states of helium-like systems

    E-Print Network [OSTI]

    Yen-Chang Lin; Yew Kam Ho

    2014-11-05T23:59:59.000Z

    The quantum entanglement for the two electrons in the excited states of the helium-like atom/ions is investigated using the two-electron wave functions constructed by the B-spline basis. As a measure of the spatial (electron-electron orbital) entanglement, the von Neumann entropy and linear entropy of the reduced density matrix are calculated for the 1s2s 1,3S excited states for systems with some selected Z values from Z=2 to Z=100. Results for the helium atom are compared with other available calculations. We have also investigated the entropies for these excited states when the nucleus charge is reduced from Z=2 to Z=1. At such a critical charge, all the singly-excited states of this system become unbound, and the linear entropies and the von Neumann entropies for the excited states are approaching 1/2 and 1, respectively, the limits for the entropies when one electron is bound to the nucleus, and the other being free.

  13. The effect of stellar feedback on a Milky Way-like galaxy and its gaseous halo

    E-Print Network [OSTI]

    Marasco, Antonino; Fraternali, Filippo; van der Hulst, Thijs; Wadsley, James; Quinn, Thomas; Rokar, Rok

    2015-01-01T23:59:59.000Z

    We present the study of a set of N-body+SPH simulations of a Milky Way-like system produced by the radiative cooling of hot gas embedded in a dark matter halo. The galaxy and its gaseous halo evolve for 10 Gyr in isolation, which allows us to study how internal processes affect the evolution of the system. We show how the morphology, the kinematics and the evolution of the galaxy are affected by the input supernova feedback energy E$_{\\rm SN}$, and we compare its properties with those of the Milky Way. Different values of E$_{\\rm SN}$ do not significantly affect the star formation history of the system, but the disc of cold gas gets thicker and more turbulent as feedback increases. Our main result is that, for the highest value of E$_{\\rm SN}$ considered, the galaxy shows a prominent layer of extra-planar cold (log(T)<4.3) gas extended up to a few kpc above the disc at column densities of $10^{19}$ cm$^{-2}$. The kinematics of this material is in agreement with that inferred for the HI halos of our Galaxy ...

  14. Particle in cell simulations of tearing modes in reversed-field-pinch-like plasma

    SciTech Connect (OSTI)

    Svidzinski, Vladmir [Los Alamos National Laboratory; Li, Hui [Los Alamos National Laboratory; Albright, Brian [Los Alamos National Laboratory

    2008-01-01T23:59:59.000Z

    Particle in cell (PIC) simulations of tearing modes in two-dimensional plane geometry in a force free reversed field pinch (RFP) like plasma equilibrium are performed to study possible kinetic effects on these modes in RFPs. Linear tearing modes are compared in the PIC and two fluid models. The results showed that the growth rates and the profiles of magnetic field components in the two models are very similar, indicating that the kinetic effects on the tearing modes are weak such that the two fluid approximation is rather accurate for modeling these instabilities in RFPs. During the nonlinear evolution of the tearing mode in this geometry small scale secondary instabilities located near the internal layer of the primary tearing instability are excited. These secondary instabilities appear to be driven by the nonlinearly induced local pressure gradient in the regions of unfavorable curvature of the nonlinearly evolved magnetic field. They could also appear in a realistic RFP geometry and play a role during sawtooth crashes in these machines.

  15. Extended space expectation values of position related operators for hydrogen-like quantum system evolutions

    SciTech Connect (OSTI)

    Kalay, Berfin; Demiralp, Metin [?stanbul Technical University, Informatics Institute, Maslak, 34469, ?stanbul (Turkey)

    2014-10-06T23:59:59.000Z

    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. 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)

    2013-07-20T23:59:59.000Z

    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.

  17. 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. Hlaine; M. Kasprzak; Y. Kermadic; K. Kirch; P. Knowles; H. -C. Koch; S. Komposch; A. Kozela; J. Krempel; B. Lauss; T. Lefort; Y. Lemire; A. Mtchedlishvili; O. Naviliat-Cuncic; F. M. Piegsa; G. Pignol; P. N. Prashanth; G. Qumner; 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

    2014-12-11T23:59:59.000Z

    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.

  18. Prediction of buried mine-like target radar signatures using wideband electromagnetic modeling

    SciTech Connect (OSTI)

    Warrick, A.L.; Azevedo, S.G.; Mast, J.E.

    1998-04-06T23:59:59.000Z

    Current ground penetrating radars (GPR) have been tested for land mine detection, but they have generally been costly and have poor performance. Comprehensive modeling and experimentation must be done to predict the electromagnetic (EM) signatures of mines to access the effect of clutter on the EM signature of the mine, and to understand the merit and limitations of using radar for various mine detection scenarios. This modeling can provide a basis for advanced radar design and detection techniques leading to superior performance. Lawrence Livermore National Laboratory (LLNL) has developed a radar technology that when combined with comprehensive modeling and detection methodologies could be the basis of an advanced mine detection system. Micropower Impulse Radar (MIR) technology exhibits a combination of properties, including wideband operation, extremely low power consumption, extremely small size and low cost, array configurability, and noise encoded pulse generation. LLNL is in the process of developing an optimal processing algorithm to use with the MIR sensor. In this paper, we use classical numerical models to obtain the signature of mine-like targets and examine the effect of surface roughness on the reconstructed signals. These results are then qualitatively compared to experimental data.

  19. Gravitating bag as a coherent system of the point-like and dressed electron

    E-Print Network [OSTI]

    Alexander Burinskii

    2015-02-03T23:59:59.000Z

    Gravitational and electromagnetic fields of an electron correspond to over-rotating Kerr-Newman (KN) solution, which has a naked singular ring and two-sheeted topology. This solution is regularized by a solitonic source, in which singular interior is replaced by a vacuum bubble filled by the Higgs field in a false-vacuum state. Field model of this KN bubble has much in common with the famous MIT and SLAC bag models, but the geometry is "dual" (turned inside out), leading to consistency of the KN bag model with gravity. Similar to other bag models, the KN bag is compliant to deformations, and under rotations it takes an oblate ellipsoidal form, creating a circular string along the border. Electromagnetic excitations of the KN bag generate stringy traveling waves which deform the bag, creating a traveling singular pole, included in a general bag-string-quark complex. The dressed electron may be considered in this model as a coherent excitation of this system, confining the point-like electron (as a quark) in state of zitterbewegung.

  20. Video Analysis and Modeling Performance Task to promote becoming like scientists in classrooms

    E-Print Network [OSTI]

    Wee, Loo Kang

    2015-01-01T23:59:59.000Z

    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...

  1. Fundamental properties of solar-like oscillating stars from frequencies of minimum $\\Delta \

    E-Print Network [OSTI]

    Y?ld?z, M; Kayhan, C

    2015-01-01T23:59:59.000Z

    The large separations between the oscillation frequencies of solar-like stars are measures of stellar mean density. The separations have been thought to be mostly constant in the observed range of frequencies. However, detailed investigation shows that they are not constant, and their variations are not random but have very strong diagnostic potential for our understanding of stellar structure and evolution. In this regard, frequencies of the minimum large separation are very useful tools. From these frequencies, in addition to the large separation and frequency of maximum amplitude, Y\\i ld\\i z et al. recently have developed new methods to find almost all the fundamental stellar properties. In the present study, we aim to find metallicity and helium abundances from the frequencies, and generalize the relations given by Y\\i ld\\i z et al. for a wider stellar mass range and arbitrary metallicity ($Z$) and helium abundance ($Y$). We show that the effect of metallicity is { significant} for most of the fundamental...

  2. One-loop energy-momentum tensor in QED with electric-like background

    E-Print Network [OSTI]

    S. P. Gavrilov; D. M. Gitman

    2012-06-30T23:59:59.000Z

    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.

  3. Dark energy and Chern-Simons like gravity from a dynamical four-form

    E-Print Network [OSTI]

    Patrick Das Gupta

    2011-12-02T23:59:59.000Z

    We consider the dynamics of a four-form field $\\tilde {w} $, treating it as a distinct physical degree of freedom, independent of the metric. The equations of motion are derived from an action which, besides having the standard Hilbert-Einstein term and the matter part, consists of a new action for $\\tilde {w} $. The evolution of $\\tilde {w} $ in a flat FRW universe is studied, and it is shown that the parameters of the theory admit solutions wherein it is possible to have an equation of state $p_\\phi \\approx -\\epsilon_\\phi $, so that it leads to an accelerating universe. We also put forward electromagnetic as well as gravitational `Chern-Simons' like terms that arise naturally in 4D, entailing a modified Einstein-Maxwell equation and an enlarged system of Einstein equation involving a Cotton tensor. We demonstrate that the scalar-density associated with $\\tilde {w} $ can be employed to construct a generalized exterior derivative that converts a p-form density to a (p+1)-form density of identical weight.

  4. Method for loading lipid like vesicles with drugs of other chemicals

    DOE Patents [OSTI]

    Mehlhorn, Rolf Joachim (Richmond, CA)

    1998-01-01T23:59:59.000Z

    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. Method for loading lipid like vesicles with drugs of other chemicals

    DOE Patents [OSTI]

    Mehlhorn, R.J.

    1998-06-09T23:59:59.000Z

    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.

  6. Efficient protocols for deterministic secure quantum communication using GHZ-like states

    E-Print Network [OSTI]

    Anindita Banerjee; Anirban Pathak

    2012-01-18T23:59:59.000Z

    Two protocols for deterministic secure quantum communication (DSQC) using GHZ-like states have been proposed. It is shown that one of these protocols can be modified to an equivalent but more efficient protocol of quantum secure direct communication (QSDC). Security and efficiency of the proposed protocols are analyzed in detail and are critically compared with the existing protocols. It is shown that the proposed protocols are highly efficient. It is also shown that all the physical systems where dense coding is possible can be used to design maximally efficient protocol of DSQC and QSDC. Further, it is shown that dense coding is sufficient but not essential for DSQC and QSDC protocols of the present kind. We have shown that there exist a large class of quantum state which can be used to design maximally efficient DSQC and QSDC protocols of the present kind. It is further, observed that maximally efficient QSDC protocols are more efficient than their DSQC counterparts. This additional efficiency arises at the cost of message transmission rate.

  7. Validation of an ICRF ITER-Like Antenna on Tore Supra

    SciTech Connect (OSTI)

    Argouarch, A.; Vulliez, K.; Berger-By, G.; Bremond, S.; Colas, L.; Lombard, G.; Mendes, A.; Millon, L.; Mollard, P.; Bottolier-Curtet, H.; Magne, R.; Volpe, D.; Becoulet, A.; Clairet, F.; Ekedahl, A.; Elkhaldi, M.; Gunn, J.; Hoang, G. T. [CEA, IRFM, F-13108 St Paul Lez Durance (France); Bosia, G. [Department of General Physics (University of Turin, Italy) (Italy); Beaumont, B. [ITER, St Paul lez Durance (France)

    2009-11-26T23:59:59.000Z

    A prototype of an ICRF antenna based on the load-resilient electrical layout foreseen for ITER has been built at CEA-Cadarache. It consists of a two resonant double loop (RDL) based on the conjugate-T concept proposed for the ITER ICRF array arranged toroidally in a close package. The antenna conditioning and commissioning have been successfully performed to validate the load resilience and the heating capability at the end of 2007. On Tore Supra despite unexciting ELMs, the load resilience studies have been conducted in L-mode by mean of slow variations of the plasma position and fast transient variations with both pellet injection and Supersonic Molecular Beam Injection (SMBI). The capability to maintain the RF power on the ITER-like antenna has been done successfully contrary to the classical ICRF antenna during the SMBI shots, in which the corresponding transient coupling resistance increased by a factor 3-4. In term of coupled power, a maximum power density of 6.6 MW/m2 is reached.

  8. Diamond-Like Carbon Coatings as Encapsulants for Photovoltaic Solar Cells

    SciTech Connect (OSTI)

    Pern, F. J.; Panosyan, Zh.; Gippius, A. A.; Kontsevoy, J. A.; Touryan, K.; Voskanyan, S.; Yengibaryan, Y.

    2005-02-01T23:59:59.000Z

    High-quality single-layer and bilayer diamond-like carbon (DLC) thin films are fabricated by two technologies, namely, ion-assisted plasma-enhanced deposition (IAPED) and electron cyclotron resonance (ECR) deposition. Deposition on various substrates, such as sapphires and solar cells, has been performed at low substrate temperatures (50 {approx} 80 C). The two deposition technologies allow good control over the growth conditions to produce DLC films with desired optical properties, thickness, and energy bandgap. The bilayer-structured DLC can be fabricated by using IAPED for the bottom layer followed by ECR for the top layer, or just by IAPED for both layers with different compositions. The DLC films have shown good spatial uniformity, density, microhardness, and adhesion strength. They exhibit excellent stability against attack by strong acids, prolonged damp-heat exposure at 85 C and 85% relative humidity, mechanical scratch, ultrasonication, and irradiation by ultraviolet (UV), protons, and electrons. When deposited on crystalline Si and GaAs solar cells in single-layer and/or bilayer structure, the DLC films not only serve as antireflection coating and protective encapsulant, but also improve the cell efficiencies.

  9. 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

    2013-01-01T23:59:59.000Z

    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...

  10. OUTFLOWS AND DARK BANDS AT ARCADE-LIKE ACTIVE REGION CORE BOUNDARIES

    SciTech Connect (OSTI)

    Scott, J. T.; Martens, P. C. H.; Tarr, L. [Department of Physics, Montana State University, Bozeman, MT 59717 (United States)

    2013-03-10T23:59:59.000Z

    Observations from the EUV Imaging Spectrometer (EIS) on board Hinode have revealed outflows and non-thermal line broadening in low intensity regions at the edges of active regions (ARs). We use data from Hinode's EIS, Solar Dynamic Observatory's Atmospheric Imaging Assembly and Helioseismic and Magnetic Imager, and the Transition Region and Coronal Explorer instrument to investigate the boundaries of arcade-like AR cores for NOAA ARs 11112, 10978, and 9077. A narrow, low intensity region that is observed at the core's periphery as a dark band shows outflows and increased spectral line broadening. This dark band is found to exist for days and appears between the bright coronal loop structures of different coronal topologies. We find a case where the dark band region is formed between the magnetic field from emerging flux and the field of the pre-existing flux. A magnetic field extrapolation indicates that this dark band is coincident with the spine lines or magnetic separatrices in the extrapolated field. This occurs over unipolar regions where the brightened coronal field is separated in connectivity and topology. This separation does not appear to be infinitesimal and an initial estimate of the minimum distance of separation is found to be Almost-Equal-To 1.5-3.5 Mm.

  11. 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)

    2004-11-15T23:59:59.000Z

    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.

  12. The influence of an ITER-like wall on disruptions at JET

    SciTech Connect (OSTI)

    Vries, P. C. de, E-mail: Peter.de.Vries@jet.efda.org; Hogeweij, G. M. D. [FOM institute DIFFER, EURATOM association, P.O. Box 1207, Nieuwegein (Netherlands)] [FOM institute DIFFER, EURATOM association, P.O. Box 1207, Nieuwegein (Netherlands); Baruzzo, M.; Murari, A. [Consorzio RFX, EURATOM-ENEA Association, Corso Stati Uniti 4, 35127 Padova (Italy)] [Consorzio RFX, EURATOM-ENEA Association, Corso Stati Uniti 4, 35127 Padova (Italy); Jachmich, S. [ERM/KMS, Association EURATOM-Belgian State, B-1000 Brussels, Brussels (Belgium)] [ERM/KMS, Association EURATOM-Belgian State, B-1000 Brussels, Brussels (Belgium); Joffrin, E.; Reux, C. [IRFM-CEA, Centre de Cadarache, 13108 Sant-Paul-lez-Durance (France)] [IRFM-CEA, Centre de Cadarache, 13108 Sant-Paul-lez-Durance (France); Lomas, P. J.; Matthews, G. F. [CCFE/Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom)] [CCFE/Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom); Nunes, I. [Associao EURATOM-IST, Instituto de Plasmas e Fuso Nuclear, 1049-001 Lisboa (Portugal)] [Associao EURATOM-IST, Instituto de Plasmas e Fuso Nuclear, 1049-001 Lisboa (Portugal); Ptterich, T. [Max-Planck-Institut fr Plasmaphysik, EURATOM Association, 85748 Garching (Germany)] [Max-Planck-Institut fr Plasmaphysik, EURATOM Association, 85748 Garching (Germany); Vega, J. [Asociacin EURATOM/CIEMAT para Fusin, Madrid (Spain) [Asociacin EURATOM/CIEMAT para Fusin, Madrid (Spain); JET-EFDA Culham Science Centre, Abingdon OX14 3DB (United Kingdom); Collaboration: JET-EFDA Contributors

    2014-05-15T23:59:59.000Z

    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.

  13. 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

    2008-10-17T23:59:59.000Z

    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.

  14. Structural evolution of the P22-like phages: Comparison of Sf6 and P22 procapsid and virion architectures

    SciTech Connect (OSTI)

    Parent, Kristin N. [University of California, San Diego, Department of Chemistry and Biochemistry, La Jolla, CA 92093 (United States)] [University of California, San Diego, Department of Chemistry and Biochemistry, La Jolla, CA 92093 (United States); Gilcrease, Eddie B. [University of Utah School of Medicine, Division of Microbiology and Immunology, Department of Pathology, Salt Lake City, UT 84112 (United States)] [University of Utah School of Medicine, Division of Microbiology and Immunology, Department of Pathology, Salt Lake City, UT 84112 (United States); Casjens, Sherwood R., E-mail: sherwood.casjens@path.utah.edu [University of Utah School of Medicine, Division of Microbiology and Immunology, Department of Pathology, Salt Lake City, UT 84112 (United States); Baker, Timothy S., E-mail: tsb@ucsd.edu [University of California, San Diego, Department of Chemistry and Biochemistry, La Jolla, CA 92093 (United States); University of California, San Diego, Division of Biological Sciences, La Jolla, CA 92093 (United States)

    2012-06-05T23:59:59.000Z

    Coat proteins of tailed, dsDNA phages and in herpesviruses include a conserved core similar to the bacteriophage HK97 subunit. This core is often embellished with other domains such as the telokin Ig-like domain of phage P22. Eighty-six P22-like phages and prophages with sequenced genomes share a similar set of virion assembly genes and, based on comparisons of twelve viral assembly proteins (structural and assembly/packaging chaperones), these phages are classified into three groups (P22-like, Sf6-like, and CUS-3-like). We used cryo-electron microscopy and 3D image reconstruction to determine the structures of Sf6 procapsids and virions ({approx} 7 A resolution), and the structure of the entire, asymmetric Sf6 virion (16-A resolution). The Sf6 coat protein is similar to that of P22 yet it has differences in the telokin domain and in its overall quaternary organization. Thermal stability and agarose gel experiments show that Sf6 virions are slightly less stable than those of P22. Finally, bacterial host outer membrane proteins A and C were identified in lipid vesicles that co-purify with Sf6 particles, but are not components of the capsid.

  15. Constraining neutrino properties with a Euclid-like galaxy cluster survey

    SciTech Connect (OSTI)

    Cerbolini, M. Costanzi Alunno; Sartoris, B.; Borgani, S. [Universit di Trieste, Dipartimento di Fisica, via Valerio, 2, 34127 Trieste (Italy); Xia, Jun-Qing [Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Science, P.O.Box 918-3, Beijing 100049, P.R.China (China); Biviano, A.; Viel, M., E-mail: costanzi@oats.inaf.it, E-mail: sartoris@oats.inaf.it, E-mail: xiajq@ihep.ac.cn, E-mail: borgani@oats.inaf.it, E-mail: viel@oats.inaf.it, E-mail: biviano@oats.inaf.it [INAF-Osservatorio Astronomico di Trieste, via Tiepolo 11, 34143 Trieste (Italy)

    2013-06-01T23:59:59.000Z

    We perform a forecast analysis on how well a Euclid-like photometric galaxy cluster survey will constrain the total neutrino mass and effective number of neutrino species. We base our analysis on the Monte Carlo Markov Chains technique by combining information from cluster number counts and cluster power spectrum. We find that combining cluster data with Cosmic Microwave Background (CMB) measurements from Planck improves by more than an order of magnitude the constraint on neutrino masses compared to each probe used independently. For the ?CDM+m{sub ?} model the 2? upper limit on total neutrino mass shifts from ?m{sub ?} < 0.35 eV using cluster data alone to ?m{sub ?} < 0.031 eV when combined with Planck data. When a non-standard scenario with N{sub eff}?3.046 number of neutrino species is considered, we estimate an upper limit of N{sub eff} < 3.14 (95%CL), while the bounds on neutrino mass are relaxed to ?m{sub ?} < 0.040 eV. This accuracy would be sufficient for a 2? detection of neutrino mass even in the minimal normal hierarchy scenario (?m{sub ?} ? 0.05 eV). In addition to the extended ?CDM+m{sub ?}+N{sub eff} model we also consider scenarios with a constant dark energy equation of state and a non-vanishing curvature. When these models are considered the error on ?m{sub ?} is only slightly affected, while there is a larger impact of the order of ? 15% and ? 20% respectively on the 2? error bar of N{sub eff} with respect to the standard case. To assess the effect of an uncertain knowledge of the relation between cluster mass and optical richness, we also treat the ?CDM+m{sub ?}+N{sub eff} case with free nuisance parameters, which parameterize the uncertainties on the cluster mass determination. Adopting the over-conservative assumption of no prior knowledge on the nuisance parameter the loss of information from cluster number counts leads to a large degradation of neutrino constraints. In particular, the upper bounds for ?m{sub ?} are relaxed by a factor larger than two, ?m{sub ?} < 0.083 eV (95%CL), hence compromising the possibility of detecting the total neutrino mass with good significance. We thus confirm the potential that a large optical/near-IR cluster survey, like that to be carried out by Euclid, could have in constraining neutrino properties, and we stress the importance of a robust measurement of masses, e.g. from weak lensing within the Euclid survey, in order to full exploit the cosmological information carried by such survey.

  16. ICRF Specific Plasma Wall Interactions in JET with the ITER-Like Wall

    SciTech Connect (OSTI)

    Bobkov, V. [Max-Planck-Institut fur Plasmaphysik, EURATOM Association, Garching, Germany] [Max-Planck-Institut fur Plasmaphysik, EURATOM Association, Garching, Germany; Arnoux, G. [EURATOM, Culham Sci Ctr, Abingdon, Oxon England] [EURATOM, Culham Sci Ctr, Abingdon, Oxon England; Brezinsek, S. [Forschungszentrum Julich, Julich, Germany] [Forschungszentrum Julich, Julich, Germany; Coenen, J. W. [Institute of Energy and Climate Research, Germany] [Institute of Energy and Climate Research, Germany; Colas, L. [French Atomic Energy Commission (CEA)] [French Atomic Energy Commission (CEA); Clever, M. [Institute of Energy and Climate Research, Germany] [Institute of Energy and Climate Research, Germany; Czarnecka, A. [Association EURATOM-IPPLM, Warsaw, Poland] [Association EURATOM-IPPLM, Warsaw, Poland; Braun, F. [Max-Planck-Institut fur Plasma Physik, Garching, Germany] [Max-Planck-Institut fur Plasma Physik, Garching, Germany; Dux, R. [Max-Planck-Institut fur Plasma Physik, Garching, Germany] [Max-Planck-Institut fur Plasma Physik, Garching, Germany; Huber, Alexander [EURATOM / FZ-Juelich, Germany] [EURATOM / FZ-Juelich, Germany; Jacquet, P. [EURATOM / UKAEA, Abingdon, UK] [EURATOM / UKAEA, Abingdon, UK; Klepper, C Christopher [ORNL] [ORNL; Lerche, E. [ERM-KMS, Association EURATOM-Belgian State, Brussels, Belgium] [ERM-KMS, Association EURATOM-Belgian State, Brussels, Belgium; Maggi, C. [Max-Planck-Institut fur Plasma Physik, Garching, Germany] [Max-Planck-Institut fur Plasma Physik, Garching, Germany; Marcotte, F. [CEA IRFM, St. Paul-lez-Durance, France] [CEA IRFM, St. Paul-lez-Durance, France; Maslov, M. [Association EURATOM-CCFE, Abingdon, UK] [Association EURATOM-CCFE, Abingdon, UK; Matthews, G. [Association EURATOM-CCFE, Abingdon, UK] [Association EURATOM-CCFE, Abingdon, UK; Mayoral, M.-L. [EURATOM / UKAEA, UK] [EURATOM / UKAEA, UK; McCormick, K. D. [Max-Planck-Institut fur Plasma Physik, Garching, Germany] [Max-Planck-Institut fur Plasma Physik, Garching, Germany; Meigs, A. G. [EURATOM / UKAEA, UK] [EURATOM / UKAEA, UK; Milanesio, D. [Politecnico di Torino] [Politecnico di Torino; Monakhov, I. [EURATOM / UKAEA, Abingdon, UK] [EURATOM / UKAEA, Abingdon, UK; Neu, Rudolf [EURATOM / IPP Garching, Germany] [EURATOM / IPP Garching, Germany; Noterdaeme, J.-M. [Max-Planck-Institut fur Plasma Physik, Garching, Germany] [Max-Planck-Institut fur Plasma Physik, Garching, Germany; Putterich, Th. [Max-Planck-Institut fur Plasma Physik, Garching, Germany] [Max-Planck-Institut fur Plasma Physik, Garching, Germany; Rimini, F. [Association EURATOM-CCFE, Abingdon, UK] [Association EURATOM-CCFE, Abingdon, UK; Rooj, G. Van [Institute for Plasma Physics Rijnhuizen, Nieuwegein, Netherlands] [Institute for Plasma Physics Rijnhuizen, Nieuwegein, Netherlands; Sergienko, G. [Institute of Energy and Climate Research, Germany] [Institute of Energy and Climate Research, Germany; Van Eester, D. [ERM-KMS, Association EURATOM-Belgian State, Brussels, Belgium] [ERM-KMS, Association EURATOM-Belgian State, Brussels, Belgium

    2013-01-01T23:59:59.000Z

    A variety of plasma wall interactions (PWIs) during operation of the so-called A2 ICRF antennas is observed in JET with the ITER-like wall. Amongst effects of the PWIs, the W content increase is the most significant, especially at low plasma densities. No increase of W source from the main divertor and entrance of the outer divertor during ICRF compared to NBI phases was found by means of spectroscopic and WI (400.9 nm) imaging diagnostics. In contrary, the W flux there is higher during NBI. Charge exchange neutrals of hydrogen isotopes could be excluded as considerable contributors to the W source. The high W content in ICRF heated limiter discharges suggests the possibility of other W sources than the divertor alone. Dependencies of PWIs to individual ICRF antennas during q95-scans, and intensification of those for the 90 phasing, indicate a link between the PWIs and the antenna near-fields. The PWIs include heat loads and Be sputtering pattern on antenna limiters. Indications of some PWIs at the outer divertor entrance are observed which do not result in higher W flux compared to the NBI phases, but are characterized by small antenna-specific (up to 25% with respect to ohmic phases) bipolar variations of WI emission. The first TOPICA calculations show a particularity of the A2 antennas compared to the ITER antenna, due to the presence of long antenna limiters in the RF image current loop and thus high near-fields across the most part of the JET outer wall.

  17. Near-Infrared Imaging Polarimetry of M42: Aperture Polarimetry of Point-like Sources

    E-Print Network [OSTI]

    Nobuhiko Kusakabe; Motohide Tamura; Ryo Kandori; Jun Hashimoto; Yasushi Nakajima; Tetsuya Nagata; Takahiro Nagayama; Jim Hough; Phil Lucas

    2008-07-09T23:59:59.000Z

    We have conducted aperture polarimetry of ~500 stars of the Orion Nebula Cluster (ONC) in M42 based on our wide-field (~8'\\times 8') $JHKs$ band polarimetry. Most of the near-infrared (NIR) polarizations are dichroic, with position angles of polarization agreeing, both globally and locally, with previous far-infrared (FIR) and submillimeter observations, having taken into account the 90$^\\circ $ difference in angles between dichroic absorption and emission. This is consistent with the idea that both NIR dichroic polarizations and FIR/submillimeter thermal polarizations trace the magnetic fields in the OMC-1 region. The magnetic fields inferred from these observations show a pinch at scales less than 0.5 pc with a centroid near IRc2. The hourglass-shaped magnetic field pattern is explained by the models in which the magnetic field lines are dragged along with the contracting gas and then wound up by rotation in a disk. The highly polarized region to the northwest of IRc2 and the low-polarized region near the bright bar are also common among NIR and FIR/submillimeter data, although a few regions of discrepancy exist. We have also discerned ~50 possible highly polarized sources whose polarizations are more likely to be intrinsic rather than dichroic. Their polarization efficiencies ($P(H)/A(H)$) are too large to be explained by the interstellar polarization. These include 10 young brown dwarfs that suggest a higher polarization efficiency, which may present geometrical evidence for (unresolved) circumstellar structures around young brown dwarfs.

  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.; Ptterich, T. [Max-Planck-Institut fr Plasmaphysik, EURATOM-Assoziation, Garching (Germany); Brezinsek, S. [IEK-4, Forschungszentrum Jlich, Association EURATOM-FZJ (Germany); Campergue, A-L. [Ecole Nationale des Ponts et Chausses, F77455 Marne-la-Valle (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

    2014-02-12T23:59:59.000Z

    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. Formation of Earth-like Planets During and After Giant Planet Migration

    E-Print Network [OSTI]

    Avi M. Mandell; Sean N. Raymond; Steinn Sigurdsson

    2007-01-02T23:59:59.000Z

    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.

  20. Identification of serum biomarkers for occupational medicamentosa-like dermatitis induced by trichloroethylene using mass spectrometry

    SciTech Connect (OSTI)

    Hong, Wen-Xu; Liu, Wei [Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Guangdong Province, Medical Key Laboratory of Health Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055 (China); Zhang, Yanfang [Shenzhen Prevention and Treatment Center for Occupational Disease, Shenzhen 518001 (China); Huang, Peiwu; Yang, Xifei; Ren, Xiaohu; Ye, Jinbo; Huang, Haiyan [Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Guangdong Province, Medical Key Laboratory of Health Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055 (China); Tang, Haiyan [Shenzhen Prevention and Treatment Center for Occupational Disease, Shenzhen 518001 (China); Zhou, Guifeng [Medical School of Hunan Normal University, Changsha 410006 (China); Huang, Xinfeng; Zhuang, Zhixiong [Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Guangdong Province, Medical Key Laboratory of Health Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055 (China); Liu, Jianjun, E-mail: bio-research@hotmail.com [Key Laboratory of Modern Toxicology of Shenzhen, Medical Key Laboratory of Guangdong Province, Medical Key Laboratory of Health Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen 518055 (China)

    2013-11-15T23:59:59.000Z

    Occupational medicamentosa-like dermatitis induced by trichloroethylene (OMLDT) is an autoimmune disease and it has become a serious occupational health hazard. In the present study, we collected fasting blood samples from patients with OMLDT (n = 18) and healthy volunteers (n = 33) to explore serum peptidome patterns. Peptides in sera were purified using weak cation exchange magnetic beads (MB-WCX), and analyzed by matrix-assisted laser desorption ionization time-of-flight-mass spectrometry (MALDI-TOF-MS) and ClinProTools bioinformatics software. The intensities of thirty protein/peptide peaks were significantly different between the healthy control and OMLDT patients. A pattern of three peaks (m/z 2106.3, 2134.5, and 3263.67) was selected for supervised neural network (SNN) model building to separate the OMLDT patients from the healthy controls with a sensitivity of 95.5% and a specificity of 73.8%. Furthermore, two peptide peaks of m/z 4091.61 and 4281.69 were identified as fragments of ATP-binding cassette transporter family A member 12 (ABCA12), and cationic trypsinogen (PRRS1), respectively. Our findings not only show that specific proteomic fingerprints in the sera of OMLDT patients can be served as a differentiated tool of OMLDT patients with high sensitivity and high specificity, but also reveal the novel correlation between OMLDT with ABC transports and PRRS1, which will be of potential value for clinical and mechanistic studies of OMLDT. - Highlights: Identify 30 differential protein/peptide peaks between OMLDT and healthy control The test sensitivity and test specificity were 95.5% and 73.8%, respectively. ABCA12 and PRSS1 were identified as potential biomarkers in OMLDT patients.

  1. 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.; Ptterich, T. [Max-Planck-Institut fr 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

    2014-02-12T23:59:59.000Z

    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.

  2. 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)

    2012-05-04T23:59:59.000Z

    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.

  3. Polaron-like vortices, dissociation transition, and self-induced pinning in magnetic superconductors

    SciTech Connect (OSTI)

    Bulaevskii, L. N., E-mail: lnb@lanl.gov; Lin, S.-Z. [Los Alamos National Laboratory, Theoretical Division (United States)] [Los Alamos National Laboratory, Theoretical Division (United States)

    2013-09-15T23:59:59.000Z

    Vortices in magnetic superconductors polarize spins nonuniformly and repolarize them when moving. At a low spin relaxation rate and at low bias currents, vortices carrying magnetic polarization clouds become polaron-like and their velocities are determined by the effective drag coefficient that is significantly bigger than the Bardeen-Stephen (BS) one. As the current increases, vortices release polarization clouds and the velocity as well as the voltage in the I-V characteristics jump to values corresponding to the BS drag coefficient at a critical current J{sub c}. The nonuniform components of the magnetic field and magnetization drop as the velocity increases, resulting in weaker polarization and a discontinuous dynamic dissociation depinning transition. Experimentally, the jump shows up as a depinning transition and the corresponding current at the jump is the depinning current. As the current decreases, on the way back, vortices are retrapped by polarization clouds at the current J{sub r} < J{sub c}. As a result, the polaronic effect suppresses dissipation and enhances the critical current. Borocarbides (RE)Ni{sub 2}B{sub 2}C with a short penetration length and highly polarizable rare earth spins seem to be optimal systems for a detailed study of vortex polaron formation by measuring I-V characteristics. We also propose to use a superconductor-magnet multilayer structure to study polaronic mechanism of pinning with the goal to achieve high critical currents. The magnetic layers should have large magnetic susceptibility to enhance the coupling between vortices and magnetization in magnetic layers while the relaxation of the magnetization should be slow. For Nb and a proper magnet multilayer structure, we estimate the critical current density J{sub c} {approx} 10{sup 9} A/m{sup 2} at the magnetic field B Almost-Equal-To 1 T.

  4. Relationship between the structure and electrical characteristics of diamond-like carbon films

    SciTech Connect (OSTI)

    Takabayashi, Susumu, E-mail: stak@riec.tohoku.ac.jp; Otsuji, Taiichi [Research Institute of Electrical Communication, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 (Japan); Yang, Meng; Ogawa, Shuichi; Hayashi, Hiroyuki; Jeko, Radek; Takakuwa, Yuji [Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 (Japan)

    2014-09-07T23:59:59.000Z

    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.

  5. 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

    2007-01-01T23:59:59.000Z

    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 ...

  6. The breather like penetration of the ultra-short linearly polarized laser into over-dense plasmas

    E-Print Network [OSTI]

    Wu, Dong; He, X T

    2012-01-01T23:59:59.000Z

    Relativistic electromagnetic penetration behavior is reexamined in the relativistic transparency region. The interaction is modeled by the relativistic hydrodynamic equations coupled with the full system of Maxwell equations, which are solved by a fully implicit energy-conserving numerical scheme. For the first time, we have studied the penetration behavior through ultra-short circularly polarized and linearly polarized laser pulses interaction with over-dense plasmas. It is shown that the ultra-short circularly polarized laser penetration occurs through a soliton like behavior, which is quite consistent with the existing studies. However, we have found that the ultra-short linearly polarized laser penetrates through a breather like behavior, and there is an energy transition mechanism with a frequency $2\\omega_0$ between the penetrated breather like structure and the background plasmas. An qualitative interpretation has been give to describe this mechanism of energy exchanging.

  7. EVIDENCE FOR THE IMPACT OF STELLAR ACTIVITY ON THE DETECTABILITY OF SOLAR-LIKE OSCILLATIONS OBSERVED BY KEPLER

    SciTech Connect (OSTI)

    Chaplin, W. J.; Broomhall, A.-M.; Hekker, S.; Elsworth, Y.; Stevens, I. R. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT (United Kingdom); Bedding, T. R.; Huber, D. [Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006 (Australia); Bonanno, A. [INAF Osservatorio Astrofisico di Catania, Via S. Sofia 78, 95123, Catania (Italy); GarcIa, R. A. [Laboratoire AIM, CEA/DSM, CNRS, Universite Paris Diderot, IRFU/SAp, 91191 Gif-sur-Yvette Cedex (France); Verner, G. A. [Astronomy Unit, Queen Mary, University of London, Mile End Road, London, E1 4NS (United Kingdom); Basu, S. [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Houdek, G. [Institute of Astronomy, University of Vienna, A-1180 Vienna (Austria); Mathur, S.; Metcalfe, T. S. [High Altitude Observatory and, Scientific Computing Division, National Center for Atmospheric Research, Boulder, Colorado 80307 (United States); Mosser, B. [LESIA, CNRS, Universite Pierre et Marie Curie, Universite Denis Diderot, Observatoire de Paris, 92195 Meudon Cedex (France); New, R. [Materials Engineering Research Institute, Faculty of Arts, Computing, Engineering and Sciences, Sheffield Hallam University, Sheffield, S1 1WB (United Kingdom); Appourchaux, T. [Institut d'Astrophysique Spatiale, Universite Paris XI, CNRS (UMR8617), Batiment 121, 91405 Orsay Cedex (France); Karoff, C. [Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark); Molenda-Zakowicz, J. [Astronomical Institute, University of Wroclaw, ul. Kopernika, 11, 51-622 Wroclaw (Poland); Monteiro, M. J. P. F. G. [Centro de Astrofisica and Faculdade de Ciencias, Universidade do Porto, Rua das Estrelas, 4150-762 (Portugal)

    2011-05-01T23:59:59.000Z

    We use photometric observations of solar-type stars, made by the NASA Kepler Mission, to conduct a statistical study of the impact of stellar surface activity on the detectability of solar-like oscillations. We find that the number of stars with detected oscillations falls significantly with increasing levels of activity. The results present strong evidence for the impact of magnetic activity on the properties of near-surface convection in the stars, which appears to inhibit the amplitudes of the stochastically excited, intrinsically damped solar-like oscillations.

  8. Tools for multiaxial validation of behavior laws chosen for modeling hyper-elasticity of rubber-like materials

    E-Print Network [OSTI]

    Chevalier, Luc; 10.1002/pen.10948

    2010-01-01T23:59:59.000Z

    We present an experimental approach to discriminate hyper-elastic models describing the mechanical behavior of rubber-like materials. An evaluation of the displacement field obtained by digital image correlation allows us to evaluate the heterogeneous strain field observed during these tests. We focus on the particular case of hyper-elastic models to simulate the behavior of some rubber-like materials. Assuming incompressibility of the material, the hyper-elastic potential is determined from tension and compression tests. A biaxial loading condition is obtained in a multiaxial testing machine and model predictions are compared with experimental results.

  9. Evaluation of the electron capture by the H-like Gd ion within line-profile approach

    SciTech Connect (OSTI)

    Andreev, O. Yu.; Prigorovsky, A. V. [Faculty of Physics, St. Petersburg State University, Ulyanovskaya 1, RU-198504, Petergof, St. Petersburg (Russian Federation); Labzowsky, L. N. [Faculty of Physics, St. Petersburg State University, Ulyanovskaya 1, RU-198504, Petergof, St. Petersburg (Russian Federation); Petersburg Nuclear Physics Institute, RU-188300, Gatchina, St. Petersburg (Russian Federation)

    2011-06-15T23:59:59.000Z

    The electron capture by the H-like Gd ion is evaluated within the frames of the line-profile approach (LPA). The energy and widths of the double-excited energy levels and the corresponding resonance strengths are calculated. With the employment of the results of our previous work, the resonance strengths for the H-like U ion were also calculated and compared with the recent experimental and theoretical data. This calculation partly takes into account the interelectron interaction to all orders of QED perturbation theory. The lowest-order radiative corrections are also included. The LPA produces results for both dielectronic and radiative recombination.

  10. Fabrication of highly transparent diamond-like carbon anti-reflecting coating for Si solar cell application

    SciTech Connect (OSTI)

    Banerjee, Amit, E-mail: erdd@iacs.res.in; Das, Debajyoti, E-mail: erdd@iacs.res.in [Nano-Science Group, Energy Research Unit, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032 (India)

    2014-04-24T23:59:59.000Z

    ARC grade highly transparent unhydrogenated diamond-like carbon (DLC) films were produced, directly from a-C target, using RF magnetron sputtering deposition technique, for optoelectronic applications. Optical band gap, transmittance, reflectance, sp{sup 3} fraction, I{sub D}/I{sub G}, density, and refractive index of the films have been estimated with the help of optical tools like Uv-vis spectrophotometer, ellipsometer and micro-Raman. Optimum ARC-qualities have been identified in low-temperature grown DLC films at an Ar pressure of 4 mTorr in the reactor, accomplishing its key requirements for use in silicon solar cells.

  11. 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

    2011-01-05T23:59:59.000Z

    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.

  12. Ion cyclotron resonance frequency heating in JET during initial operations with the ITER-like wall

    SciTech Connect (OSTI)

    Jacquet, P., E-mail: philippe.jacquet@ccfe.ac.uk; Monakhov, I.; Arnoux, G.; Brix, M.; Graham, M.; Meigs, A.; Sirinelli, A. [Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom); Bobkov, V.; Devaux, S.; Drewelow, P.; Ptterich, T. [Max-Planck-Institut fr Plasmaphysik, EURATOM-Assoziation, Garching (Germany); Colas, L. [CEA, IRFM, F-13108 Saint-Paul-Lez-Durance (France); Czarnecka, A. [Association Euratom-IPPLM, Hery 23, 01-497 Warsaw (Poland); Lerche, E.; Van-Eester, D. [Association EURATOM-Belgian State, ERM-KMS, Brussels (Belgium); Mayoral, M.-L. [Euratom/CCFE Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom); EFDA Close Support Unit, Garching (Germany); Brezinsek, S. [IEK-4, Forschungszentrum Jlich, Association EURATOM-FZJ, Jlich (Germany); Campergue, A.-L. [Ecole Nationale des Ponts et Chausses, F77455 Marne-la-Valle (France); Klepper, C. C. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169 (United States); Milanesio, D. [Politecnico di Torino, Department of Electronics, Torino (Italy); and others

    2014-06-15T23:59:59.000Z

    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 materials on the JET Ion Cyclotron Resonance Frequency (ICRF) operation is assessed and some important properties of JET plasmas heated with ICRF are highlighted. A???20% reduction of the antenna coupling resistance is observed with the ILW as compared with the JET carbon (JET-C) wall. Heat-fluxes on the protecting limiters close the antennas, quantified using Infra-Red 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 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. The location of the tungsten ICRF specific source could not be identified but some experimental observations indicate that main-chamber W components could be an important impurity source: for example, the divertor W influx deduced from spectroscopy is comparable when using RF or NBI at same power and comparable divertor conditions, and Be evaporation in the main chamber results in a strong reduction of the impurity level. In L-mode plasmas, the ICRF specific high-Z impurity content decreased when operating at higher plasma density and when increasing the hydrogen concentration from 5% to 15%. Despite the higher plasma bulk radiation, ICRF exhibited overall good plasma heating performance; the power is typically deposited at the plasma centre while the radiation is mainly from the outer part of the plasma bulk. Application of ICRF heating in H-mode plasmas has started, and the beneficial effect of ICRF central electron heating to prevent W accumulation in the plasma core has been observed.

  13. Like all other vertebrates, fish need time to recover after exhaustive activity. Furthermore, a rapid rate of recovery may

    E-Print Network [OSTI]

    Farrell, Anthony P.

    Like all other vertebrates, fish need time to recover after exhaustive activity. Furthermore. For example, a rapid rate of recovery is needed to keep migratory passage timely when adult salmon use of anaerobic swimming because the entire upstream migration is completed using stored energy reserves

  14. 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

  15. nature physics | VOL 6 | MARCH 2010 | www.nature.com/naturephysics 155 How do you solve a problem like friction?

    E-Print Network [OSTI]

    Loss, Daniel

    a problem like friction? I learned to respect friction, as a phenomenon with many nuances, when I friction between the ball and floor, work out, first, how far the ball goes before it is rolling. The first part, I quickly demonstrated, is easy. Assuming the force of sliding friction is independent

  16. 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

  17. A heat-shock-like response with cytoskeletal disruption occurs following hydrostatic pressure in MG-63 osteosarcoma cells

    E-Print Network [OSTI]

    Athanasiou, Kyriacos

    A heat-shock-like response with cytoskeletal disruption occurs following hydrostatic pressure in MG,K.A., KLEBE,R., and CAMERON,I.L. 1993. A heat-shock-likeresponse with cytoskeletal disruption occurs following distribution of the cytoskeletal elements and heat shock protein 70 (hsp70) were followed by indirect

  18. Electron Compton-like quasielastic scattering from H2, D2, and HD R. A. Bonham,1

    E-Print Network [OSTI]

    Hitchcock, Adam P.

    Electron Compton-like quasielastic scattering from H2, D2, and HD R. A. Bonham,1 G. Cooper,2 and A for quasielastic scattering of D2 to H2 in a 50:50 mixture has been reported recently Phys. Rev. Lett. 100, 043204 2008 . In particular, the interpretation of quasielastic scattering provided in that work predicts

  19. NEUTRON LIFETIME EXPERIMENT BASED ON AN `ACCORDION-LIKE' UCN STORAGE VOLUME COATED WITH `LOW TEMPERATURE FOMBLIN'

    E-Print Network [OSTI]

    Steyerl, Albert

    , Cambridge, MA, USA; 2 University of Rhode Island, Kingston, RI, USA; 3 Joint Institute for Nuclear Research-fluorinated polymer, `Low Temperature Fomblin', has been tested as a wall coating in an ultracold neutron (UCN of an accordion-like storage vessel. In this system, the surface area and its distribution over height remain

  20. Family business Information Update Please list all members that would like to receive information about the Family Business Council events.

    E-Print Network [OSTI]

    de Lijser, Peter

    Family business Information Update Please list all members that would like to receive information about the Family Business Council events. Name Company Mailing Address City State/Province ZipPhone #12;Thank you for helping us update our records. Please send information about the Family Business

  1. Planning your business: The Business Plan A business plan is like a road map for your business. Careful

    E-Print Network [OSTI]

    Planning your business: The Business Plan A business plan is like a road map for your business. Careful planning is key to any successful business. A business plan ensures that resources are available, including (time, money, and opportunities). It helps you decide where you want to go with the business

  2. Decorating anode with bamboo-like nitrogen-doped carbon nanotubes for microbial Suqin Ci a,c

    E-Print Network [OSTI]

    Decorating anode with bamboo-like nitrogen-doped carbon nanotubes for microbial fuel cells Suqin Ci, Nanchang 330063, PR China b Department of Mechanical, University of Wisconsin--Milwaukee, 3200 North Cramer November 2011 Available online 20 November 2011 Keywords: Carbon nanotubes Nitrogen doping Anode Microbial

  3. ROFESSOR SUSAN J SMITH doesn't look like a radical. Tall, elegant and softly spoken she

    E-Print Network [OSTI]

    26 CAM 59 #12;P ROFESSOR SUSAN J SMITH doesn't look like a radical. Tall, elegant and softly spoken she might be, but under that calm exterior, Professor Smith has a startling ­ and seemingly highly, Susan J Smith (the initial, she says, essential in a world dictated by Google) rather enjoys swimming

  4. Acknowledgements WWF-UK would like to thank Earthsight Investigations for their assistance in carrying out this

    E-Print Network [OSTI]

    timber products back to their source. The key finding of the study is just how little companies know like to thank the companies that responded to our requests for information: Arnold Laver; B Plywood & Doors; Pacific Rim Wood UK; Palmer Timber Ltd; Panaget; Paterson Timber Ltd; Tarkett AB

  5. Arabidopsis Thaliana CARBOXYL-TERMINAL DOMAIN PHOSPHATASE-Like1 (CPL1) Mediates Responses to Iron Deficiency and Cadmium Toxicity

    E-Print Network [OSTI]

    Aksoy, Emre

    2014-04-24T23:59:59.000Z

    the mechanisms that regulate this response in plants. In this dissertation, a RNA metabolism factor, RNA POLYMERASE II CTD-PHOSPHATASE-LIKE1 (CPL1) was shown to localize to the root stele, and to be involved in the regulation of Fe deficiency responses...

  6. Fractional Dynamical Model for the Generation of ECG like Signals from Filtered Coupled Van-der Pol Oscillators

    E-Print Network [OSTI]

    Saptarshi Das; Koushik Maharatna

    2014-10-20T23:59:59.000Z

    In this paper, an incommensurate fractional order (FO) model has been proposed to generate ECG like waveforms. Earlier investigation of ECG like waveform generation is based on two identical Van-der Pol (VdP) family of oscillators which are coupled by time delays and gains. In this paper, we suitably modify the three state equations corresponding to the nonlinear cross-product of states, time delay coupling of the two oscillators and low-pass filtering, using the concept of fractional derivatives. Our results show that a wide variety of ECG like waveforms can be simulated from the proposed generalized models, characterizing heart conditions under different physiological conditions. Such generalization of the modelling of ECG waveforms may be useful to understand the physiological process behind ECG signal generation in normal and abnormal heart conditions. Along with the proposed FO models, an optimization based approach is also presented to estimate the VdP oscillator parameters for representing a realistic ECG like signal.

  7. Renewable Energy 33 (2008) 226231 The effect of annealing on the properties of diamond-like carbon

    E-Print Network [OSTI]

    Hong, Byungyou

    Renewable Energy 33 (2008) 226­231 The effect of annealing on the properties of diamond-like carbon (XPS) and high-resolution transmission electron microscopy (HRTEM). The reflectance of DLC thin film was investigated by UV­vis spectrometry and its electrical properties were investigated using a four point probe

  8. Japan-Korea Workshop 2007, Gifu, Japan Honeycomb-like Large Area LaB6 Plasma Source

    E-Print Network [OSTI]

    Princeton Plasma Physics Laboratory

    Japan-Korea Workshop 2007, Gifu, Japan Honeycomb-like Large Area LaB6 Plasma Source for Multi Research Center, 2) Hanyang University #12;Japan-Korea Workshop 2007, Gifu, Japan AbstractAbstract Multi field intensity of 870 G #12;Japan-Korea Workshop 2007, Gifu, Japan Overview of MP2Overview of MP2 #12

  9. Shells of crabs like these may be the key to prolonging the life of microbial fuel cells that

    E-Print Network [OSTI]

    Shells 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) -- Discarded crab and lobster shells may be the key to prolonging the life of microbial fuel cells that power

  10. Electrophoretic-like Gating Used To Control Metal-Insulator Transitions in Electronically Phase Separated Manganite Wires

    E-Print Network [OSTI]

    Tennessee, University of

    traditional carrier doping and by inducing electroresistive phase transitions in the material. In the case, and an electric field applied to the gate acts to change the material's access to electrons. This switchingElectrophoretic-like Gating Used To Control Metal-Insulator Transitions in Electronically Phase

  11. When you hear the term "heart disease," what's your first reaction? Like many women, you may think, "That's a

    E-Print Network [OSTI]

    Bandettini, Peter A.

    When you hear the term "heart disease," what's your first reaction? Like many women, you may think, "That's a man's disease." But here's The Heart Truth: Heart disease is the #1 killer of Latinas in the United States. Together with stroke, heart disease accounts for a third of all deaths among Latinas

  12. When you hear the term "heart disease," what is your first reaction? Like many women, you may think, "That's a

    E-Print Network [OSTI]

    Bandettini, Peter A.

    When you hear the term "heart disease," what is your first reaction? Like many women, you may think, "That's a man's disease." But here's The Heart Truth: Heart disease is the #1 killer of women in the United States. It is also a leading cause of disability among women. If you've got a heart, heart disease

  13. The coupling between eye movements and cognition varies with the task at hand. In tasks like reading, the eyes

    E-Print Network [OSTI]

    Logan, Gordon D.

    The coupling between eye movements and cognition varies with the task at hand. In tasks like reading, the eyes are "the window to the soul," moving with each step of the underlying process, the coupling is looser. People tend to look at certain locations, but the sequence of eye movements

  14. 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

    . Geobacter uses hair-like extensions known as pili to generate electricity from mud and wastewater by converting decomposed marine organisms into electricity." By converting naturally occurring fuels and oxidants in the marine environment into electricity, Naval vessels could be running on a clean

  15. Most impacts on wildlife will likely be indirect as wildlife species respond to slow changes in plant

    E-Print Network [OSTI]

    New Hampshire, University of

    : status and concerns. Ecological relationships of winter ticks, moose, and climate change. Moose) changes · "moose sickness" · deer keds · forestry impacts ("sprucification") Russia: poaching#12; Most impacts on wildlife will likely be indirect as wildlife species respond to slow changes

  16. 2 Dynamic analysis of mixed ion beams/materials effects on the performance 3 of ITER-like devices

    E-Print Network [OSTI]

    Harilal, S. S.

    ions from the core plasma with impurities of 37 beryllium and carbon eroded from PFC can cause erosion from the surface layers, physical sputtering of target 47 atoms, and possible bubble formation of minute impurities like 59carbon, oxygen, or beryllium. These impurities will also influence 60hydrogen

  17. 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

  18. Ratchet behavior in nonlinear Klein-Gordon systems with point-like inhomogeneities Luis MoralesMolina

    E-Print Network [OSTI]

    Snchez, Angel "Anxo"

    Ratchet behavior in nonlinear Klein-Gordon systems with point-like inhomogeneities Luis Morales: February 14, 2005) We investigate the ratchet dynamics of nonlinear Klein-Gordon kinks in a periodic a collective coordinate framework, which shows that such system behaves as a rocking ratchet for point

  19. 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

  20. 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

  1. IMC-like Analytical H design with S/SP mixed sensitivity consideration: Utility in PID tuning guidance6

    E-Print Network [OSTI]

    Skogestad, Sigurd

    IMC-like Analytical H design with S/SP mixed sensitivity consideration: Utility in PID tuning methodology is also suitable for teaching purposes. Key words: H control, Weighted Sensitivity, IMC, PID, the Proportional-Integrative-Derivative (PID) controller is recognized to be the bread and butter of automatic

  2. Structural basis of double-stranded RNA recognition by the RIG-I like receptor MDA5

    E-Print Network [OSTI]

    Strong, Roland K.

    Structural basis of double-stranded RNA recognition by the RIG-I like receptor MDA5 Xiaojun Li online 14 June 2009 Keywords: Innate immunity Nucleic acid receptor MDA5 CTD Crystal structure a b s t r a c t RIG-I, MDA5 and LGP2 are cytosolic pattern recognition receptors detecting single

  3. Immigration and poverty in the United States with immigrants. In this article, we examine the likely direct

    E-Print Network [OSTI]

    Sekhon, Jasjeet S.

    27 Immigration and poverty in the United States with immigrants. In this article, we examine the likely direct and indirect effects of immigration on poverty rates. Basic poverty trends Poverty-born, whereas poverty among immigrants increased. Although the poverty rate of immigrants from many regions has

  4. INHIBITION OF CASPASE-LIKE ACTIVITIES PREVENTS THE APPEARANCE OF REACTIVE OXYGEN SPECIES AND DARK-INDUCED APOPTOSIS

    E-Print Network [OSTI]

    Berges, John A.

    cells revealed by SYTOX-green staining, and the generation of reactive oxygen species (ROS), we usedINHIBITION OF CASPASE-LIKE ACTIVITIES PREVENTS THE APPEARANCE OF REACTIVE OXYGEN SPECIES AND DARK viability; Dunaliella tertiolecta; phosphatidylserine; phytoplankton; reactive oxygen species; unicellular

  5. Ambiguities of the CPT-even aether-like Lorentz-breaking term at the finite temperature

    E-Print Network [OSTI]

    T. Mariz; J. R. Nascimento; A. Yu. Petrov; W. Serafim

    2014-06-11T23:59:59.000Z

    In this paper, we consider the finite temperature behaviour of the CPT-even aether-like Lorentz-breaking term in the extended Lorentz-breaking QED and demonstrate that its ambiguities whose presence has been shown earlier in the zero temperature case stay also at the finite temperature.

  6. Bounds on the CP asymmetry in like-sign dileptons from B-0(B)over-bar(0) meson decays

    E-Print Network [OSTI]

    Besson, David Zeke; Bean, Alice; Ammar, Raymond G.

    2001-05-01T23:59:59.000Z

    We have measured the charge asymmetry in like-sign dilepton yields from B-0(B) over bar (0) meson decays using the CLEO detector at the Cornell Electron Storage Ring. We find a(ll)(0) drop [N(l(+)l(+))-N(l(-)l(-))]/[N(l(+)l(+)) ...

  7. The seismic monitoring of buildings is particularly important in high-population urban areas like Greater Boston. While

    E-Print Network [OSTI]

    Polz, Martin

    PROBLEM The seismic monitoring of buildings is particularly important in high-population urban areas like Greater Boston. While Massachusetts' seismic building codes are adapted from Cali- fornia to damage from earthquakes of small magnitude, particularly if the fundamen- tal frequency of the seismic

  8. 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)

    2013-11-20T23:59:59.000Z

    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.

  9. Collisional Ionization Equilibrium for Optically Thin Plasmas. I. Updated Recombination Rate Coefficients for Bare though Sodium-like Ions

    E-Print Network [OSTI]

    P. Bryans; N. R. Badnell; T. W. Gorczyca; J. M. Laming; W. Mitthumsiri; D. W. Savin

    2006-08-01T23:59:59.000Z

    Reliably interpreting spectra from electron-ionized cosmic plasmas requires accurate ionization balance calculations for the plasma in question. However, much of the atomic data needed for these calculations have not been generated using modern theoretical methods and are often highly suspect. This translates directly into the reliability of the collisional ionization equilibrium (CIE) calculations. We make use of state-of-the-art calculations of dielectronic recombination (DR) rate coefficients for the hydrogenic through Na-like ions of all elements from He up to and including Zn. We also make use of state-of-the-art radiative recombination (RR) rate coefficient calculations for the bare through Na-like ions of all elements from H through to Zn. Here we present improved CIE calculations for temperatures from $10^4$ to $10^9$ K using our data and the recommended electron impact ionization data of \\citet{Mazz98a} for elements up to and including Ni and Mazzotta (private communication) for Cu and Zn. DR and RR data for ionization stages that have not been updated are also taken from these two additional sources. We compare our calculated fractional ionic abundances using these data with those presented by Mazzotta et al. for all elements from H to Ni. The differences in peak fractional abundance are up to 60%. We also compare with the fractional ionic abundances for Mg, Si, S, Ar, Ca, Fe, and Ni derived from the modern DR calculations of \\citet{Gu03a,Gu04a} for the H-like through Na-like ions, and the RR calculations of \\citet{Gu03b} for the bare through F-like ions. These results are in better agreement with our work, with differences in peak fractional abundance of less than 10%.

  10. 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 fr Astrophysik, Karl-Schwarzschild-Str. 1, D-85741 Garching (Germany); Fink, M.; Rpke, F. K. [Institut fr Theoretische Physik und Astrophysik, Universitt Wrzburg, Am Hubland, D-97074 Wrzburg (Germany); Pakmor, R., E-mail: zwliu@ynao.ac.cn [Heidelberger Institut fr Theoretische Studien, Schloss-Wolfsbrunnenweg 35, D-69118 Heidelberg (Germany)

    2013-12-01T23:59:59.000Z

    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.

  11. The FIP-1 like polyadenylation factor in trypanosomes and the structural basis for its interaction with CPSF30

    SciTech Connect (OSTI)

    Bercovich, Natalia; Levin, Mariano J. [INGEBI-CONICET, Vta. de Obligado 2490, 2P, CP 1428, 1428 Buenos Aires (Argentina); Vazquez, Martin P. [INGEBI-CONICET, Vta. de Obligado 2490, 2P, CP 1428, 1428 Buenos Aires (Argentina); Departamento de Fisiologia, Biologia Molecular y Celular, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. II, Buenos Aires (Argentina)], E-mail: mvazquez@fbmc.fcen.uba.ar

    2009-03-20T23:59:59.000Z

    In trypanosomes transcription is polycistronic and individual mRNAs are generated by a trans-splicing/polyadenylation coupled reaction. We identified a divergent trypanosome FIP1-like, a factor required for mRNA 3' end formation from yeasts to human. Here we showed that it is a nuclear protein with a speckled distribution essential for trypanosome viability. A strong interaction was found between TcFIP1-like and TcCPSF30, a component of the polyadenylation complex. We determined the specific amino acids in each protein involved in the interaction. Significant differences were found between the trypanosome interaction surface and its human counterpart. Although CPSF30/FIP1 interaction is known in other organisms, this is the first report mapping the interaction surface at the amino acid level.

  12. Theoretical studies of the atomic transitions in boron-like ions: Mg VIII, Si X and S XII

    E-Print Network [OSTI]

    H. S. Nataraj; B. K. Sahoo; B. P. Das; R. K. Chaudhuri; D. Mukherjee

    2007-07-30T23:59:59.000Z

    In this paper, we have carried out the calculations of the weighted oscillator strengths and the transition probabilities for a few low-lying transitions of boron-like ions: Mg VIII, Si X and S XII which are astrophysically important, particularly, in the atmospheres of the solar corona. We have employed an all-order relativistic many-body theory called the relativistic coupled-cluster theory to calculate very precisely these atomic quantities of astrophysical interest. We have reported for the first time the transition probabilities for some forbidden transitions which are unavailable in the literature; either theoretically or experimentally. We also discuss the physical effects associated with these transitions. Our data can be used for the identification of spectral lines arising from the coronal atmospheres of Sun and Sun-like stars having an extended corona.

  13. Modelling gamma-ray-axion-like particle oscillations in turbulent magnetic fields: relevance for observations with Cherenkov telescopes

    E-Print Network [OSTI]

    Manuel Meyer

    2014-12-08T23:59:59.000Z

    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.

  14. Using the X-FEL to photo-pump X-ray laser transitions in He-like Ne

    SciTech Connect (OSTI)

    Nilsen, J; Rohringer, N

    2011-08-30T23:59:59.000Z

    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.

  15. Biochemical and Developmental Characterization of a SNF2-like ATPase Amplified in Liver Cancer 1 (ALC1)

    E-Print Network [OSTI]

    Gottschalk, Aaron James

    2010-06-07T23:59:59.000Z

    . Ino80 and Swr1 complexes regulate double-strand break repair. ...........................................26 Figure 8. SNF2 ATPases have specialized modes of chromatin remodeling. Nucleosome......................28 Figure 9. Model for translocation... that the Snf2-related chromatin remodeling complexes Ino80 and Swr1 have essential roles in DNA damage and recombination [60]. An interesting characteristic of Ino80 and Swr1 type remodeling complexes is that each includes Ruv-B like helicases as subunits...

  16. Large-scale coherent orientations of quasar polarisation vectors: interpretation in terms of axion-like particles

    SciTech Connect (OSTI)

    Payez, A.; Hutsemekers, D.; Cudell, J. R. [University of Liege, Allee du 6 Aout 17, 4000 Liege (Belgium)

    2010-08-30T23:59:59.000Z

    The observation of redshift-dependent coherent orientations of quasar polarisation vectors over cosmological distances in some regions of the sky is reviewed. Based on a good-quality sample of 355 measured quasars, this observation seems to infer the existence of a new effect acting on light propagation on such huge distances.A solution in terms of nearly massless axion-like particles has been proposed in the literature and its current status is discussed.

  17. Relativistic MR-MP calculations of the energy levels and transition probabilities in Ni- to Kr-like Pt ions

    SciTech Connect (OSTI)

    Santana, Juan A., E-mail: santanajuan@berkeley.edu [Space Sciences Laboratory, 7 Gauss Way, University of California, Berkeley, CA 94720-7450 (United States); Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, PR 00931 (United States); Ishikawa, Yasuyuki, E-mail: yishikawa@uprrp.edu [Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, PR 00931 (United States)] [Department of Chemistry, University of Puerto Rico, P.O. Box 23346, San Juan, PR 00931 (United States); Trbert, Elmar, E-mail: traebert@astro.rub.de [Astronomisches Institut, Ruhr-Universitt Bochum, D-44780 Bochum (Germany) [Astronomisches Institut, Ruhr-Universitt Bochum, D-44780 Bochum (Germany); Physics Division, LLNL, P.O. Box 808, Livermore, CA 94551 (United States)

    2014-01-15T23:59:59.000Z

    Ni- to Kr-like Pt ions have been studied by relativistic multi-reference MllerPlesset many-body perturbation theory calculations. Energy levels and lifetimes of low-lying excited states within the n=4 complex are reported for each ion. Wavelengths and transition probabilities for the strongest electric-dipole transitions are compared with available experimental data. Synthetic radiative spectra are shown for various wavelength regions.

  18. 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 [Helsinki Inst. of Phys.; Alvarez Gonzalez, B [Oviedo U., Cantabria Inst. of Phys.; Amerio, S [INFN, Padua; Amidei, D [Michigan U.; Anastassov, A [Northwestern U.; Annovi, A [Frascati; Antos, J [Comenius U.; Apollinari, G [Fermilab; Appel, J A [Fermilab; Apresyan, A [Purdue U.; Arisawa, T [Waseda U., Dubna, JINR

    2011-10-25T23:59:59.000Z

    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.

  19. 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

    2009-05-15T23:59:59.000Z

    IMPACT OF BODY CONDITION ON PLASMA LEPTIN AND INSULIN-LIKE GROWTH FACTOR-I CONCENTRATIONS IN STALLIONS AND GELDINGS A Thesis by TOMMY NEAL CHANCELLOR Submitted to the Office of Graduate Studies of Texas A...-I CONCENTRATIONS IN STALLIONS AND GELDINGS A Thesis by TOMMY NEAL CHANCELLOR Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE...

  20. Cost comparison of collaborative and IPD-like project delivery methods versus non-collaborative project delivery methods

    E-Print Network [OSTI]

    Kulkarni, Aditi; Rybkowski, Zofia K.; Smith, James

    2012-07-17T23:59:59.000Z

    Proceedings of the 20th Conference of the International Group for Lean Construction July 17-22, 2012: San Diego, CA, U.S.A. 781 COST COMPARISON OF COLLABORATIVE AND IPD-LIKE PROJECT DELIVERY METHODS VERSUS COMPETITIVE NON... acceptance of IPD for public projects. KEYWORDS Collaboration, Project Delivery, CM-at-Risk (CMR; CMAR), Competitive Sealed Proposal (CSP), Integrated Project Delivery (IPD), Design-Bid-Build (DBB), Cost Comparison INTRODUCTION One of the most widely...