Sample records for dick henry jb

  1. Moby Dick.

    ERIC Educational Resources Information Center

    Stern, Milton R.

    1986-01-01

    Discusses examples in "Moby Dick" of Melvillean words symptomatic of the significance of Ishmael's rhetorical energy, in order to suggest that Ishmael's language reflects Melville's search for lexical and rhetorical forms that express the democratic impulse. (SRT)

  2. Dick receives 2011 Harry H. Hess Medal: Citation

    NASA Astrophysics Data System (ADS)

    Niu, Yaoling

    2012-01-01

    Henry J. B. Dick was awarded the 2011 Harry H. Hess Medal at the AGU Fall Meeting Honors Ceremony, held on 7 December 2011 in San Francisco, Calif. The medal is for “outstanding achievements in research on the constitution and evolution of Earth and other planets.”

  3. Dick receives 2011 Harry H. Hess Medal: Response

    NASA Astrophysics Data System (ADS)

    Dick, Henry J. B.

    2012-01-01

    Henry J. B. Dick was awarded the 2011 Harry H. Hess Medal at the AGU Fall Meeting Honors Ceremony, held on 7 December 2011 in San Francisco, Calif. The medal is for “outstanding achievements in research on the constitution and evolution of Earth and other planets.”

  4. Henri Poincar Henri Poincare University Nancy 1

    E-print Network

    Boyer, Edmond

    Université Henri Poincaré Henri Poincar´e University ­ Nancy 1 Security Framework for Decentralized the Research Master of Henri Poincar´e University ­ Nancy 1 (Computer Science: Services, Security and Networks) by Jagdish Prasad Achara Composition of jury Didier Galmiche Professor at Henri Poincar´e University ­ Nancy

  5. Henry's Gallery

    NSDL National Science Digital Library

    Diltz, Henry.

    This site showcases the work of Henry Diltz, the official photographer of the Woodstock and Monterey Pop Festivals and over 100 album covers. Although the site is designed as a commercial enterprise (many of the photos can be ordered at the site), users are free to browse this collection of over 100 photos, some with brief notes, of many of the leading Rock and Roll musicians of the 1960s and 70s. Some of the photos were taken during posed sessions or album cover shoots, but many are candids to be found nowhere else. Highlights include shots of Joni Mitchell, David Crosby, and Eric Clapton in Mama Cass's backyard; Jerry Garcia jamming at Crosby's house; and the Who at the Monterey Pop Festival with a hapless engineer trying to save his microphones from Pete Townshend's flailing guitar. Additional resources include a brief special feature on Henry's recollections of Woodstock (with photos).

  6. Bruce A. Measure Dick Wallace

    E-print Network

    Bruce A. Measure Chair Montana Dick Wallace Vice-Chair Washington Rhonda Whiting Montana W. Bill in the day, and she listed the items on the agenda. Update on activities of Columbia Basin Trust: Dick Wallace, Council Vice-chair. Dick Wallace reported on recent activities related to the Columbia Basin

  7. Interview with Dick Whiteside

    ERIC Educational Resources Information Center

    Winarski, Kathy

    2005-01-01

    Dick Whiteside, Vice President for Enrollment Management at Tulane University, is one of the leading strategists in the field of enrollment management. Dr. Whiteside has held influential positions at the University of Hartford, in West Hartford, Connecticut, The Johns Hopkins University in Baltimore, Maryland, the City University of New York in…

  8. Generalized Dicke States

    E-print Network

    Stephan Hartmann

    2012-01-09

    Quantum master equations are an important tool in quantum optics and quantum information theory. For systems comprising a small to medium number of atoms (or qubits), the non-truncated equations are usually solved numerically. In this paper, we present a group-theoretical superoperator method that helps solving these equations. To do so, we exploit the SU(4)-symmetry of the respective Lindblad operator and construct basis states that generalize the well-known Dicke states. This allows us to solve various problems analytically and to considerably reduce the complexity of problems that can only be solved numerically. Finally, we present three examples that illustrate the proposed method.

  9. The Dick Thornburgh Papers

    NSDL National Science Digital Library

    2005-01-01

    During his long and distinguished career, Dick Thornburgh has served as Attorney General of the United States and also completed two terms as the Governor of Pennsylvania. Given these positions, many will not be surprised to learn that the University of Pittsburgh has created this online collection of materials donated to the institution by Thornburgh himself. Over the past several years, the Digital Research Library at the institution has scanned over 37,000 pages of text and photographs for inclusion on this site. After reading the profile of Thornburgh in the â??Aboutâ? section, first-time visitors may wish to acquaint themselves with the various phases of his work in â??The Collectionâ? section, which includes sub-sections titled â??Early Legal Careerâ?, â??Pittsburgh Civic Activityâ?, and â??Audioâ?, which contains campaign speeches and the like.

  10. Moby Dick Big Read

    NSDL National Science Digital Library

    Melville, Herman, 1819-1891

    2012-01-01

    The Great White Whale truly comes alive in this creative and thoughtful website created by artist Angela Cockayne and writer Philip Hoare. While collaborating in Spring 2011 for Peninsula Arts at Plymouth University to curate the ââ?¬Å?Dominionââ?¬Â whale symposium and exhibition, they came to believe that there was something more to their ââ?¬Å?Moby Dickââ?¬Â obsession. Thus, in September 2012, they launched an online version of Herman Melville's classic work featuring all 135 chapters read on audio by a mixture of "the celebrated and the unknown" for free download to the public. The project is chronicled via a podcast on the main site, Facebook, SoundCloud, and iTunes. Chapters to watch for include readings by Neil Tennant, Nigel Williams, and noted actress Tilda Swinton.

  11. DICK'S HOUSE Questions and answers to frequently

    E-print Network

    Myers, Lawrence C.

    DICK'S HOUSE FAQ Questions and answers to frequently asked questions at the Geisel School of Medicine Always identify yourself as a Geisel student when you contact Dick's House!! Updated: December 2013 #12;Dick's House FAQ Contents How do I find what I need quickly in this document? 2 Mental Health

  12. Henry Hudson Monument, seen from Frances Schervier Apartments, with Henry ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Monument, seen from Frances Schervier Apartments, with Henry Hudson Bridge, Inwood Hill Park, Manhattan skyline, George Washington Bridge, Hudson River, and Palisades Interstate Park in background, looking south. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  13. Henry Hudson Monument, seen from Frances Schervier Apartments, with Henry ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Monument, seen from Frances Schervier Apartments, with Henry Hudson Bridge, Inwood Hill Park, Manhattan skyline, and George Washington Bridge in background, looking southwest. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  14. UAV Photogrammetry Henri Eisenbei

    E-print Network

    Giger, Christine

    UAV Photogrammetry Henri Eisenbeiß Zurich, 2009 #12;#12;This publication is an edited version of: DISS. ETH NO. 18515 UAV Photogrammetry A dissertation submitted to ETH ZURICH for the degree of Doctor, Switzerland Prof. Dr. Impyeong Lee, co-examiner Seoul, Korea 2009 #12;ii IGP Mitteilungen Nr. 105 UAV

  15. Henry ‘the Navigator’

    Microsoft Academic Search

    Ivana Elbl

    2001-01-01

    Infante Dom Henrique of Portugal, better known as Henry the Navigator, has enjoyed much attention from historians and public alike. Past writers have elevated him to an icon of chivalry and Portuguese national spirit, or, because of his impact on the early overseas expansion, ascribed to him a Promethean role in the rise of modernity. The works of Sir Peter

  16. Moby-Dick. [Lesson Plan].

    ERIC Educational Resources Information Center

    Soderquist, Alisa

    Based on Herman Melville's novel "Moby-Dick," this lesson plan presents activities designed to help students understand that the novel is grounded in facts that Melville acquired in his own experiences at sea; New England was the center of a prospering whaling industry in the 19th century; and journal keeping was not uncommon among 19th-century…

  17. Henry M. Jackson

    NSDL National Science Digital Library

    Henry M. Jackson served for over three decades in the U.S. Senate. First elected in 1941, Jackson was a strong supporter of the defense industries located in Washington and also found time to run for President in 1972 and 1976. Recently, the University of Washington Digital Collections program created the Henry M. Jackson digital collection for the use of scholars and anyone with an interest in political and state history. First-time visitors should read the essay about Jackson titled "A Legacy of Public Service" and then begin looking over the nice archive of photos. The photos are contained within fifteen different sections, such as "Atomic Energy and Hanford", "In Washington State", and "With the Kennedys".

  18. Homological Algebra Henri Cartan and

    E-print Network

    Landweber, Laura

    Homological Algebra Henri Cartan and Samuel Eilenberg Henri Cartan and Sam- uel Eilenberg first met of their collaboration was Homological Algebra, in which the authors tied together strands of algebra and topology to create the new math- ematical field named in the book's title. Homological algebra is an area

  19. Brans-Dicke Gravity from Entropic Viewpoint

    E-print Network

    Ee Chang-Young; Kyoungtae Kimm; Daeho Lee

    2013-01-10

    We interpret the Brans-Dicke gravity from entropic viewpoint. We first apply the Verlinde's entropic formalism in the Einstein frame, then perform the conformal transformation which connects the Einstein frame to the Jordan frame. The transformed result yields the equation of motion of the Brans-Dicke theory in the Jordan frame.

  20. Measuring Henry's Cabin

    NSDL National Science Digital Library

    2010-07-12

    This resource introduces students to the aspects a builder must think about before constructing a building. Students will study the cabin blueprint of Henry David Thoreau and then will find the surface area of the walls and how much paint would be needed. Then, students will find the volume of the cabin to determine the home heating needs. Thirdly, students will study the blueprint and will create a 1/10 scale of it on graph paper and then will use art supplies to create a model of the cabin. Lastly, students will design and create models of furniture to scale for the cabin.

  1. Archives -Centre d'tudes et de Recherche Henri-Poincar Henri Poincar

    E-print Network

    Paris-Sud XI, Université de

    Archives - Centre d'Études et de Recherche Henri-Poincaré Henri Poincaré Des Mathématiques à la tel-00137859,version1-22Mar2007 #12;Archives - Centre d'Études et de Recherche Henri-Poincaré Henri....................................................................................................................................... 2 HENRI POINCARÉ DES MATHÉMATIQUES À LA PHILOSOPHIE...................3 Introduction Problèmes de

  2. Brans-Dicke cylindrical wormholes

    SciTech Connect

    Eiroa, Ernesto F. [Instituto de Astronomia y Fisica del Espacio, Casilla de Correo 67, Sucursal 28, 1428, Buenos Aires (Argentina); Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellon I, 1428, Buenos Aires (Argentina); Simeone, Claudio [Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellon I, 1428, Buenos Aires (Argentina); IFIBA, CONICET, Ciudad Universitaria Pabellon I, 1428, Buenos Aires (Argentina)

    2010-10-15

    Static axisymmetric thin-shell wormholes are constructed within the framework of the Brans-Dicke scalar-tensor theory of gravity. Examples of wormholes associated with vacuum and electromagnetic fields are studied. All constructions must be threaded by exotic matter, except in the case of geometries with a singularity of finite radius, associated with an electric field, which can have a throat supported by ordinary matter. These results are achieved with any of the two definitions of the flare-out condition considered.

  3. Brans-Dicke cylindrical wormholes

    E-print Network

    Ernesto F. Eiroa; Claudio Simeone

    2010-10-25

    Static axisymmetric thin-shell wormholes are constructed within the framework of the Brans-Dicke scalar-tensor theory of gravity. Examples of wormholes associated with vacuum and electromagnetic fields are studied. All constructions must be threaded by exotic matter, except in the case of geometries with a singularity of finite radius, associated with an electric field, which can have a throat supported by ordinary matter. These results are achieved with any of the two definitions of the flare-out condition considered.

  4. Henri Poincare and XXth Century Topology.

    E-print Network

    Novikov, Sergei Petrovich

    Henri Poincare and XXth Century Topology. dedicated to the 150th birthday of Henri Poincare and 100th birthday of Henri Cartan S.P.Novikov University of Maryland, College Park and Landau Institute, Moscow #12;110 years passed since Henri Poincare' pub- lished his memoir ,,Analysis Situs" (AS, 1895

  5. J.B. v. M.B.

    PubMed

    2001-01-01

    Court Decision: 783 Atlantic Reporter, 2d Series 707; 2001 August 14 (date of decision). The New Jersey Supreme Court,held that a couple's agreement regarding the fate of their frozen preembryos, made at the beginning of IVF treatment, is enforceable and subject to either party's right to change his or her mind. Furthermore, the court held that a former wife's desire to destroy preembryos created with her former husband prevails over his desire to donate or use the preembryos. After suffering fertility problems, plaintiff J.B. and defendant M.B. underwent in vitro fertilization (IVF) procedures during their marriage. The procedures resulted in twelve preembryos, four of which were implanted in J.B., and eight of which were cryopreserved. Shortly after giving birth to their only child, the couple divorced. M.B. sought to donate the preembryos to other couples; J.B. sought to have the preembryos destroyed. The New Jersey Supreme Court held that, ordinarily, the party wishing to avoid procreation should prevail. Because the defendant is capable of fathering additional children, the court affirmed J.B.'s right to prevent procreation and ordered the preembryos destroyed. The court further concluded "that a contract to procreate is contrary to New Jersey public policy and is unenforceable." PMID:16285109

  6. Cosmic Acceleration and Brans-Dicke Theory

    E-print Network

    M. Sharif; Saira Waheed

    2013-03-08

    This paper is devoted to study the accelerated expansion of the universe by exploring the Brans-Dicke parameter in different eras. For this purpose, we take FRW universe model with viscous fluid (without potential) and Bianchi type I universe model with barotropic fluid (with and without potential). We evaluate deceleration parameter as well as Brans-Dicke parameter to explore cosmic acceleration. It is concluded that accelerated expansion of the universe can also be achieved for higher values of the Brans-Dicke parameter in some cases.

  7. Conformal classes of Brans-Dicke gravity

    E-print Network

    Israel Quiros

    1999-04-02

    A classification of Brans-Dicke theories of gravitation, based on the behaviour of the dimensionless gravitational coupling constant, is given. It is noted that the discussion takes place in the current literature, about which of the two distinguished conformal frames in which scalar-tensor theories of gravity can be formulated: the Jordan frame and the Einstein frame, is the physical one, may, in most cases, be meaningless for both frames may belong to the same conformal class. It is also noted that the Jordan frame formulation of Brans-Dicke gravity with ordinary matter nonminimally coupled, that is shown to be just the Jordan frame formulation of general relativity, is scale-invariant, unlike the situation with the Jordan frame representation of Brans-Dicke gravity with matter minimally coupled (the original formulation of Brans-Dicke theory), where the presence of nonzero mass ordinary matter breaks the scale-invariance of the theory.

  8. Preventing Existence Cleo Condoravdi Dick Crouch

    E-print Network

    Stolle, Reinhard

    of prevention statements in both natural language semantics and knowledge representation, with particular regard problems for both knowledge representation and natural language semantics. (1) Negotiations preventedPreventing Existence Cleo Condoravdi Dick Crouch John Everett Valeria Paiva Reinhard Stolle Danny

  9. Quantum criticality in a generalized Dicke model

    E-print Network

    Yong Li; Z. D. Wang; C. P. Sun

    2007-10-01

    We employ a generalized Dicke model to study theoretically the quantum criticality of an extended two-level atomic ensemble interacting with a single-mode quantized light field. Effective Hamiltonians are derived and diagonalized to investigate numerically their eigenfrequencies for different quantum phases in the system. Based on the analysis of the eigenfrequencies, an intriguing quantum-phase transition from a normal phase to a superradiant phase is revealed clearly, which is quite different from that observed with a standard Dicke model.

  10. Generalized Brans-Dicke theories

    E-print Network

    Antonio De Felice; Shinji Tsujikawa

    2010-07-14

    In Brans-Dicke theory a non-linear self interaction of a scalar field allows a possibility of realizing the late-time cosmic acceleration, while recovering the General Relativistic behavior at early cosmological epochs. We extend this to more general modified gravitational theories in which a de Sitter solution for dark energy exists without using a field potential. We derive a condition for the stability of the de Sitter point and study the background cosmological dynamics of such theories. We also restrict the allowed region of model parameters from the demand for the avoidance of ghosts and instabilities. A peculiar evolution of the field propagation speed allows us to distinguish those theories from the LCDM model.

  11. Thin-shell wormholes in Brans-Dicke gravity

    E-print Network

    Ernesto F. Eiroa; Martin G. Richarte; Claudio Simeone

    2009-03-12

    Spherically symmetric thin-shell wormholes are constructed within the framework of Brans-Dicke gravity. It is shown that, for appropriate values of the Brans-Dicke constant, these wormholes can be supported by matter satisfying the energy conditions.

  12. Osler and bookworms--the "Henry connection".

    PubMed Central

    Graner, J L

    1984-01-01

    Insect bookworms were a little-known interest of Sir William Osler and F. P. Henry. Each man wrote an article on the subject, Osler's appearing thirteen years after that of Henry. Several unpublished communications regarding Osler's interest in bookworms are discussed. A recently-discovered 1903 inscription to Henry demonstrates Osler's early interest in bookworms and suggests that Henry may have been an important influence in generating that interest. Images PMID:6388694

  13. Henry VIII: Man and Monarch

    NSDL National Science Digital Library

    2009-01-01

    Henry VIII was a man of many passions and pursuits, and during his life he made maps, engaged in the sporting life, and was known to dabble in religious matters in a fashion that would have widespread ramifications. The British Library has created this fine online exhibit gallery to complement an in situ exhibit on this 16th century monarch. The materials on the site are divided into seven sections, including "The Great Matter", "Musician, sportsman, worshipper", and "Militarist and mapmaker". Visitors might do well to start with "The Great Matter", as it offers a nice selection of primary documents related to Henry's struggle to divorce Katherine of Aragon so that he might be able to marry Anne Boleyn. It's worth noting that visitors can zoom in and out within each digitized object. Moving on, the "Interactive" feature allows users to read notes that Henry himself added to three key documents created during his reign.

  14. Handbook for Royal (Dick) School of Veterinary Studies

    E-print Network

    MacDonald, Andrew

    Handbook for Research Students at the R (D) SVS 2013/2014 Royal (Dick) School of Veterinary Studies for Research Students within the Royal (Dick) School of Veterinary Studies. It is a guide to what is expected will have a productive and successful time in Edinburgh. #12;3 Royal (Dick) School of Veterinary Studies

  15. Nonsingular Brans-Dicke-? cosmology

    NASA Astrophysics Data System (ADS)

    Tretyakova, D. A.; Shatskiy, A. A.; Novikov, I. D.; Alexeyev, S.

    2012-06-01

    We discuss a Brans-Dicke model with a cosmological constant, a negative value of the w parameter, and an arbitrary (in general nonvanishing) scale factor at the big bang. The Friedmann equations for a flat universe are considered. The current observational values for Hubble constant H0 and deceleration parameter q0 play the role of initial conditions. We follow the approach of Uehara and Kim in order to solve field equations analytically. In K. Uehara and C. W. Kim [Phys. Rev. DPRVDAQ0556-2821 26, 2575 (1982)]10.1103/PhysRevD.26.2575 only positive values of w were considered; we extend the study to a complete set of possible w values. Our main result is that the scale factor (during its evolution back in time direction) may not vanish, unlike in the standard ?CDM case. In other words, the considered model demonstrates a cosmological bounce instead of the initial singularity. The famous formula , that leads to the bounce, is valid only for the dust-filled universe with p=0 and, therefore, is not adequate for the early universe hot stage when the bounce happens. So, our results are qualitative in nature and must be used to obtain initial values for the hot stage of the Universe.

  16. The Beauty of Henri Matisse

    ERIC Educational Resources Information Center

    Carrier, David

    2004-01-01

    Because beauty has for a long time now been politically incorrect (at least among certain influential critics and academic historians) the art of Henri Matisse has recently suffered from a kind of benign neglect. His goals were luxury, calm, and voluptuousness, not social critique. Liberated from any vital connection with everyday life, they often…

  17. Understanding Human Experience Henry Kautz

    E-print Network

    Kautz, Henry

    Understanding Human Experience Henry Kautz One of the earliest goals of research in artificial intelligence was to create systems that can interpret and understand day to day human experience. Early work on the goal of building systems that understand human experience. Each of the previous barriers is weakened

  18. The Right Fit for Henry

    ERIC Educational Resources Information Center

    Gould, J. Christine; Staff, Linda K.; Theiss, Heather M.

    2012-01-01

    When Henry was enrolled in a gifted program in 3rd grade, he showed many of the classic signs of giftedness, but his reading and writing skills were below grade level. An evaluation revealed that he was twice-exceptional--he was gifted and he had a learning disability. Believing that both his giftedness and his learning disability warranted…

  19. Neurology Research Henry Ford Hospital

    E-print Network

    Berdichevsky, Victor

    Neurology Research Henry Ford Hospital presented by Zhenggang Zhang, MD. Ph.D. Senior Scientist, Department of Neurology #12;Neurology Research Directed by Michael Chopp Ph.D NIH grants: 1 PO1 and 10 RO1 of neurological outcome in these patients. #12;Restorative Therapies for Stroke #12;Model of Middle Cerebral

  20. Measure Zero Henry Y. Chan

    E-print Network

    May, J. Peter

    Measure Zero Henry Y. Chan July 1, 2013 1 Measure Zero Lebesgue measure gives a concrete way about sets which have Lebesgue measure zero. These sets are "small" in some senses, but they can behave is said to have measure zero if for every > 0, there exist open cubes U1, U2, · · · such that A i=1 Ui

  1. Brans-Dicke DGP brane cosmology

    SciTech Connect

    Atazadeh, K.; Sepangi, H.R., E-mail: hr-sepangi@sbu.ac.ir [Department of Physics, Shahid Beheshti University, Evin, Tehran 19839 (Iran, Islamic Republic of)

    2009-01-15

    We consider a five dimensional DGP-brane scenario endowed with a non-minimally coupled scalar field within the context of Brans-Dicke theory. This theory predicts that the mass appearing in the gravitational potential is modified by the addition of the mass of the effective intrinsic curvature on the brane. We also derive the effective four dimensional field equations on a 3+1 dimensional brane where the fifth dimension is assumed to have an orbifold symmetry. Finally, we discuss the cosmological implications of this setup, predicting an accelerated expanding universe with a value of the Brans-Dicke parameter {omega} consistent with values resulting from the solar system observations.

  2. Mean field description of the Dicke Model

    E-print Network

    Jorge G. Hirsch; Octavio Castanos; Ramon Lopez-Pena; Eduardo Nahmad-Achar

    2011-10-14

    A mean field description of the Dicke model is presented, employing the Holstein-Primakoff realization of the angular momentum algebra. It is shown that, in the thermodynamic limit, when the number of atoms interacting with the photons goes to infinity the energy surface takes a simple form, allowing for a direct description of many observables.

  3. Functional Methods in the Generalized Dicke Model

    E-print Network

    M. Aparicio Alcade; A. L. L. de Lemos; N. F. Svaiter

    2007-06-12

    The Dicke model describes an ensemble of N identical two-level atoms (qubits) coupled to a single mode of a bosonic field. The fermion Dicke model should be obtained by changing the atomic pseudo-spin operators by a linear combination of Fermi operators. The generalized fermion Dicke model is defined introducing different coupling constants between the single mode of the bosonic field and the reservoir. In the thermodynamic limit, the fermion Dicke model can be analized using the path integral approach with functional method. The system exhibits a second order phase transition from normal to superrandiance at some critical temperature with the presence of a condensate. We evaluate the critical transition temperature and present the spectrum of the collective bosonic excitations. There is quantum phantum critical behavior when the coupling constants satisfy an especific condition. Two particular situations are analyzed. First, we present the spectrum of the collective bosonic excitations in the case using the rotating-wave approximation, recovering the well know results. Second, the case only considering virtual processes. In the last case, it is possible to have a superradiance phase when only virtual processes are introduced in the interaction Hamiltonian. Here also appears a quantum phase transition at some critical coupling, and for larger values for the critical coupling, the system enter in this superradiant phase with a Goldstone mode.

  4. Musum Henri-Lecoq 15 rue Bardoux Clermont-FerrandMusum Henri-Lecoq 15 rue Bardoux Clermont-FerrandMusum Henri-Lecoq 15 rue Bardoux Clermont-FerrandMusum Henri-Lecoq 15 rue Bardoux Clermont-Ferrand Voyage sur la math-monde !Voyage sur la math-monde

    E-print Network

    Sart, Remi

    Muséum Henri-Lecoq ­ 15 rue Bardoux ­ Clermont-FerrandMuséum Henri-Lecoq ­ 15 rue Bardoux ­ Clermont-FerrandMuséum Henri-Lecoq ­ 15 rue Bardoux ­ Clermont-FerrandMuséum Henri-Lecoq ­ 15 rue Bardoux sur la math-monde ! Au muséum Henri-LecoqAu muséum Henri-LecoqAu muséum Henri-LecoqAu muséum Henri

  5. Nonlocality of $W$ and Dicke states subject to losses

    E-print Network

    Tomer Jack Barnea; Gilles Pütz; Jonatan Bohr Brask; Nicolas Brunner; Nicolas Gisin; Yeong-Cherng Liang

    2014-12-18

    We discuss the nonlocality of the $W$ and the Dicke states subject to losses. We consider two noise models, namely loss of excitations and loss of particles, and investigate how much loss can be tolerated such that the final state remains nonlocal. This leads to a measure of robustness of the nonlocality of Dicke states, with a clear physical interpretation. Our results suggest that the relation between nonlocality and entanglement of Dicke states is not monotonous.

  6. Selective control of the symmetric Dicke subspace in trapped ions

    SciTech Connect

    Lopez, C. E.; Retamal, J. C. [Departamento de Fisica, Universidad de Santiago de Chile, Casilla 307 Correo 2, Santiago (Chile); Solano, E. [Physics Department, ASC, and CeNS, Ludwig-Maximilians-Universitaet, Theresienstrasse 37, 80333 Munich (Germany); Seccion Fisica, Departamento de Ciencias, Pontificia Universidad Catolica del Peru, Apartado 1761, Lima (Peru)

    2007-09-15

    We propose a method of manipulating selectively the symmetric Dicke subspace in the internal degrees of freedom of N trapped ions. We show that the direct access to ionic-motional subspaces, based on a suitable tuning of motion-dependent ac Stark shifts, induces a two-level dynamics involving previously selected ionic Dicke states. In this manner, it is possible to produce, sequentially and unitarily, ionic Dicke states with increasing excitation number. Moreover, we propose a probabilistic technique to produce directly any ionic Dicke state assuming suitable initial conditions.

  7. One Too Many 2006 Richard Conn Henry

    E-print Network

    One Too Many © 2006 Richard Conn Henry Richard Conn Henry There was no way that the boy could know itbut it was happening all over Europe. The boy only knew that the ice above the village had retreated warmth, and the boy was happy. His pebbles rattled in his pocket, just as his cows sometimes rattled

  8. The Don Henry Story. Teaching with Documents.

    ERIC Educational Resources Information Center

    National Archives and Records Administration, Washington, DC.

    Don Henry was a student at the University of Kansas (Lawrence, Kansas) who experienced a profound political change during his years on campus. Henry became a leader in radical campus organizations, volunteered to fight in the Spanish Civil War with the Lincoln Brigade, and died on the battlefield in Aragon (Spain) in September 1937. An article in…

  9. Henry's law constants of polyols

    NASA Astrophysics Data System (ADS)

    Compernolle, S.; Müller, J.-F.

    2014-05-01

    Henry's law constants (HLC) are derived for several polyols bearing between 2 and 6 hydroxyl groups, based on literature data for water activity, vapour pressure and/or solubility. Depending on the case, infinite dilution activity coefficients (IDACs), solid state pressures or activity coefficient ratios are obtained as intermediary results. For most compounds, these are the first values reported, while others compare favourably with literature data in most cases. Using these values and those from a previous work (Compernolle and Müller, 2014), an assessment is made on the partitioning of polyols, diacids and hydroxy acids to droplet and aqueous aerosol.

  10. Henry (Hank) J. Moore (1928-1998)

    NASA Astrophysics Data System (ADS)

    Thompson, Thomas W.

    Henry (Hank) J. Moore, a member of the AGU Planetary Sciences section, died of a heart attack on September 21, 1998. He was in Utah while on a family trip to visit his daughter. His 70th birthday occurred just 3 weeks before his death. Henry, who was born in Albuquerque, New Mexico, took great pride in having found and visited the small town of Albuquerque in the Extremadura region of Spain, noting the geologic similarities between that part of Spain and his birthplace in America.Henry, known for his contributions to the Apollo,Viking, Magellan, and Mars Pathfinder missions, attributed his career to a chance encounter with Gene Shoemaker in 1960. Henry was completing his Ph.D. work in geology at Stanford University and Gene obviously had spotted Henry's keen analytical mind. I suspect this pivotal meeting was far from a chance encounter.

  11. LITTLE GROTHENDIECK`S THEOREM FOR REAL JB*-TRIPLES

    E-print Network

    LITTLE GROTHENDIECK`S THEOREM FOR REAL JB is called "Little Grothendieck's inequality" or "Little Grothendieck's Theorem" for commutative C*-'algebras. In the non-commutative case, Pisier ([P1 ], [P2 ]) and Haagerup ([H1 ],[H2 ]) proved a "Little Grothendieck

  12. LITTLE GROTHENDIECK`S THEOREM FOR REAL JB*-TRIPLES

    E-print Network

    LITTLE GROTHENDIECK`S THEOREM FOR REAL JB*-TRIPLES ANTONIO M. PERALTA Abstract We prove that given T 2 |f|2 dµ for all f C(). This result is called "Little Grothendieck's inequality" or "Little]) and Haagerup ([H1],[H2]) proved a "Little Grothendieck Theorem" for C*-algebras. That is, if T : C H

  13. LITTLE GROTHENDIECK`S THEOREM FOR REAL JB*-TRIPLES

    E-print Network

    Peralta, Antonio M.

    LITTLE GROTHENDIECK`S THEOREM FOR REAL JB*-TRIPLES ANTONIO M. PERALTA Abstract We prove that given a probability measure on such that kT(f)k2 K2 kTk2 Z jfj2 d for all f 2 C( ). This result is called \\Little Grothendieck's inequality" or \\Little Grothendieck's Theorem" for commutative C*-algebras. In the non

  14. Brane Cosmic String Compactification in Brans-Dicke Theory

    E-print Network

    M. C. B. Abdalla; M. E. X. Guimaraes; J. M. Hoff da Silva

    2007-03-26

    We investigate an alternative compactification of extra dimensions using local cosmic string in the Brans-Dicke gravity framework. In the context of dynamical systems it is possible to show that there exist a stable field configuration for the Einstein-Brans-Dicke equations. We explore the analogies between this particular model and the Randall-Sundrum scenario.

  15. Brans-Dicke Scalar Field as a Chameleon

    E-print Network

    Sudipta Das; Narayan Banerjee

    2008-07-01

    In this paper it is shown that in Brans - Dicke theory, if one considers a non-minimal coupling between the matter and the scalar field, it can give rise to a late time accelerated expansion for the universe preceded by a decelerated expansion for very high values of the Brans - Dicke parameter $\\omega$.

  16. Tribute to Dick Post on His 90th Birthday

    NASA Astrophysics Data System (ADS)

    Fowler, Ken

    2008-12-01

    Richard F. (Dick) Post, who began his fusion career in 1951, has been one of the most creative and prolific scientists in the world fusion program. In this essay, fellow fusion scientist Ken Fowler pays tribute to Dick's multi-decade contributions.

  17. Gravitation and the earth sciences: the contributions of Robert Dicke

    E-print Network

    Kragh, Helge

    2015-01-01

    The American physicist Robert Dicke (1916-1997) is primarily known for his important contributions to gravitation, cosmology, and microwave physics. Much less known is his work in geophysics and related areas of the earth sciences in which he engaged himself and several of his collaborators in the period from about 1957 to 1969. Much of Dicke's work in geophysics was motivated by his wish to obtain evidence in support of the non-Einstenian Brans-Dicke theory of gravitation. The idea of a decreasing gravitational constant, as entertained by Dicke and some other physicists (including Pascual Jordan), played some role in the process that transformed the static picture of the Earth to a dynamical picture. It is not by accident that Dicke appears as a minor actor in histories of the plate tectonic revolution in the 1960s.

  18. Part 1: First Phase Project Overview LTR 20422 ---MOBY DICK, The Mobile Digital Companion

    E-print Network

    Havinga, Paul J.M.

    Part 1: First Phase Project Overview LTR 20422 ---MOBY DICK, The Mobile Digital Companion MOBY DICK: Luigi Rizzo #12;Part 1: First Phase Project Overview LTR 20422 ---MOBY DICK, The Mobile Digital Companion 2 1 System support for hybrid networks One objective of the MOBY DICK project is to find out

  19. Controlled Dicke Subradiance from a Large Cloud of Two-Level Systems Tom Bienaime,1

    E-print Network

    Controlled Dicke Subradiance from a Large Cloud of Two-Level Systems Tom Bienaime´,1 Nicola Celoria 16, I-20133 Milano, Italy (Received 28 July 2011; published 23 March 2012) Dicke superradiance has on the pioneering work by Dicke, who studied collective decay rates in small and large samples [7]. Dicke states

  20. Sahlqvist theory for Hybrid Logic Opgedragen aan Dick de Jongh voor zijn 65ste verjaardag

    E-print Network

    ten Cate, Balder

    Sahlqvist theory for Hybrid Logic Opgedragen aan Dick de Jongh voor zijn 65ste verjaardag Balder ten Cate, Maarten Marx and Petrucio Viana In his work and life, Dick de Jongh often emphasized this part of Dick's work. Thanks Dick. 1 Introduction Hybrid logic comes with a general completeness result

  1. Generation of Dicke states using adiabatic passage

    E-print Network

    K. Toyoda; T. Watanabe; T. Kimura; S. Nomura; S. Haze; S. Urabe

    2011-01-24

    Entangled states of two ions are realized by using an adiabatic process. Based on the proposal by Linington and Vitanov, we have generated Dicke states in optical qubits of two $^{40}$Ca$^+$ ions by applying frequency-chirped optical pulses with time-dependent envelopes to perform rapid adiabatic passage on sideband transitions. One of the biggest advantages of adiabatic approaches is their robustness against variations in experimental parameters, which is verified by performing experiments for different pulse widths or peak Rabi frequencies. Fidelities exceeding 0.5, which is the threshold for inseparable states, are obtained over wide ranges of parameter values.

  2. Henry's law constants of polyols

    NASA Astrophysics Data System (ADS)

    Compernolle, S.; Müller, J.-F.

    2014-12-01

    Henry's law constants (HLC) are derived for several polyols bearing between 2 and 6 hydroxyl groups, based on literature data for water activity, vapour pressure and/or solubility. While deriving HLC and depending on the case, also infinite dilution activity coefficients (IDACs), solid state vapour pressures or activity coefficient ratios are obtained as intermediate results. An error analysis on the intermediate quantities and the obtained HLC is included. For most compounds, these are the first values reported, while others compare favourably with literature data in most cases. Using these values and those from a previous work (Compernolle and Müller, 2014), an assessment is made on the partitioning of polyols, diacids and hydroxy acids to droplet and aqueous aerosol.

  3. The Sir Henry Dryden Collection

    NSDL National Science Digital Library

    2007-01-01

    Like many of his peers who were "to the manor born", Sir Henry Dryden was a 19th century Brit who was fascinated with archaeology and the world of antiquity. Before his death in 1899, he produced thousands of architectural and archaeological drawings based on the things he saw and studied during his travels around Britain and Europe. Recently, a consortium of institutions including the University College Northampton digitized a number of Dryden?s drawings, and subsequently placed them online here. Visitors can browse the materials by date, or by topics that include archaeology, arms and armor, and church architecture. The heraldry area within arms and armor is worth a look, as it contains some highly detailed renderings of various coats of arms and heraldic shields. Overall, the collection provides an interesting look into one man's passion for the built environment and the world of 19th century Britain.

  4. "Cold Venal Advocate": Henry Fielding's lawyers 

    E-print Network

    Lee, Joshua R

    2013-02-22

    Henry Fielding wrote frequently and harshly about lawyers. While many commentators have noted Fielding's criticism of lawyers and studied Fielding's concern with legal institutions generally, none have yet undertaken a ...

  5. THE HENRY FOUNDATION, INC. FINANCIAL STATEMENTS

    E-print Network

    Independent Auditor's Report. . . . . . . . . . . . . . . . 1 Statement of Financial PositionTHE HENRY FOUNDATION, INC. FINANCIAL STATEMENTS DECEMBER 31, 2005 #12;TABLE OF CONTENTS PAGES . . . . . . . . . . . . . . . . . . 4 Notes to the Financial Statements . . . . . . . . . . . . . 5-6 #12;MEMBERS OF THE AMERICAN

  6. Critical Behavior in the Brans-Dicke Theory of Gravitation

    E-print Network

    Takeshi Chiba; Jiro Soda

    1996-03-28

    The collapse of a massless scalar field in the Brans-Dicke theory of gravitation is studied in the analysis of both analytical solution and numerical one. By conformally transforming the Roberts's solution into the Brans-Dicke frame, we find for $\\omega > -3/2$ that a continuous self-similarity continues and that the critical exponent does depend on $\\omega$. By conformally transforming the Choptuik's solution into the Brans-Dicke frame, we find for $\\omega > -3/2$ that at the critical solution shows discrete self-similarity, however, the critical exponent depends strongly on $\\omega$ while the echoing parameter weakly on it.

  7. Obituary: Henry Emil Kandrup, 1955-2003

    NASA Astrophysics Data System (ADS)

    Merritt, David; Gottesman, Stephen T.

    2004-12-01

    Henry Emil Kandrup died on 18 October 2003 at his home in Gainesville Florida. Henry was a theoretical astrophysicist specializing in the application of chaotic dynamics to stellar systems. At the time of his death, Henry was a Professor at the University of Florida where he had taught for 13 years. Henry was born in Manhasset, New York on July 24, 1955 and spent most of his childhood in Great Neck. His parents, Jytte and Fred, were immigrants from Denmark where his father had worked as a silver smith. Henry was a precocious child, skipping both third and fifth grades. With the help of Sidney Spivack, a professor of sociology at Columbia University, his parents enrolled Henry in the Brooks Preparatory School in Andover, Massachusetts. After graduating at age 16, Henry enrolled at Cornell, transferring to Princeton the following year. Henry's parents adored their only child and worked hard to provide him with intellectual opportunities. Henry became an accomplished musician (organ, piano, French horn) and linguist (English, Danish, German) and was a passionate devotee of opera and ballet. Henry received his PhD in 1980 from the University of Chicago, where his thesis advisor was James Ipser. He taught at Oakland University in Michigan and Syracuse University in New York before coming to the University of Florida in 1990. Henry was sui generis. He shunned conventionality in his personal appearance and in his public demeanor, and always chose forthrightness and candor over polite silence. But to those of us who knew Henry well, his bluntness was a reflection of his intellectual consistency. Henry always said exactly what he thought, both in his published work and his public presentations, and never compromised himself for the sake of appearances. Nothing that he said or wrote was less than fully thought out. Henry's PhD thesis was entitled "Stochastic Problems in Stellar Dynamics," and most of his subsequent research was in this field. Motion in stellar systems can be stochastic for three reasons: deflection of trajectories by close encounters; non-integrability of the smoothed-out potential; and an oscillating mean field. Henry made important contributions to our understanding of all three sorts of chaos. In a series of papers from the early 1990's, Henry developed the idea of ``chaotic phase mixing," the process by which an ensemble of points evolves toward a uniform coarse-grained population of phase space. Prior to Henry's work, the evolution of stellar systems to a steady state was attributed loosely to "violent relaxation," defined as phase-space repopulation driven by changes in the smooth potential. Henry pointed out that changes in the gravitational potential do not by themselves constitute relaxation; at best, they can contribute to relaxation by inducing a degree of chaos in the stellar trajectories. But it is the chaos that is responsible for the mixing and hence for the approach to a steady state. Among his other important contributions to stellar dynamics were a formal demonstration of the equivalence of Landau damping and phase mixing, and a proof (with J. F. Sygnet) of the linear stability of a broad class of stellar systems. Shortly before his death, Henry was working on the chaotic dynamics of charged particle beams and on the influence of binary super massive black holes on orbital motion in galaxies. Henry was one of the principle organizers of more than a dozen workshops on non-linear dynamics in astronomy and astrophysics that were held at the University of Florida. At the time of his death, he was negotiating with Springer Verlag over publication of a monograph, Hamiltonian Galactic Dynamics. Henry was famous for the energetic quality of his lectures. Like many other excellent teachers, he drew upon his research to enliven his undergraduate teaching. Under Research Interests, his web site lists "creative utilization of playdough, margaritas, and spirographs in graduate and undergraduate teaching." Henry received numerous teaching citations and awards; he was consiste

  8. Conformally-flat Stackel spaces in Brans-Dicke theory

    E-print Network

    V. V. Obukhov; K. E. Osetrin; A. E. Filippov; Yu. A. Rybalov

    2009-04-15

    The classification problem for conformally-flat space-times that admit a separation of variables in the Hamilton-Jacobi equation of the scalar-tensor Brans-Dicke theory of gravity is examined. The field equations of the scalar-tensor theory of Brans and Dicke for conformally-flat Stackel space-times of type (1.1) are solved. An explicit form of the metric tensor and scalar field is obtained.

  9. Pairwise Quantum Correlations for Superpositions of Dicke States

    E-print Network

    Zhengjun Xi; Heng-Na Xiong; Yongming Li; Xiaoguang Wang

    2012-01-19

    Pairwise correlation is really an important property for multi-qubit states. For the two-qubit X states extracted from Dicke states and their superposition states, we obtain a compact expression of the quantum discord by numerical check. We then apply the expression to discuss the quantum correlation of the reduced two-qubit states of Dicke states and their superpositions, and the results are compared with those obtained by entanglement of formation, which is a quantum entanglement measure.

  10. Quantum Phase Transition in a Pseudo-hermitian Dicke model

    E-print Network

    Tetsuo Deguchi; Pijush K. Ghosh

    2009-07-18

    We show that a Dicke-type pseudo-hermitian Hamiltonian undergoes quantum phase transition by mapping it to the "Dressed Dicke Model" through a similarity transformation. We find the positive-definite metric in the Hilbert space of the pseudo-hermitian Hamiltonian so that it is unitary and allows a consistent quantum description. Further, we obtain the limit in which the pseudo-hermitian Hamiltonian is exactly solvable.

  11. Gravitational Waves in Generalised Brans-Dicke Theory

    E-print Network

    B. K. Sahoo; L. P. Singh

    2004-01-15

    We have solved cosmological gravitational Wave(GW)equation in the frame work of Generalised Brans-Dicke(GBD) theory for all epochs of the Universe.The solutions are expressed in terms of the present value of the Brans-Dicke coupling parameter $\\omega(\\phi)$.It is seen that the solutions represent travelling growing modes for negative values of $\\omega_{0}$ for all epochs of the Universe.

  12. Conditional preparation of arbitrary atomic Dicke states

    E-print Network

    Karel Lemr; Jaromir Fiurasek

    2008-12-02

    We propose an experimentally accessible procedure for conditional preparation of highly non-classical states of collective spin of an atomic ensemble. The quantum state engineering is based on a combination of QND interaction between atoms and light previously prepared in a non-Gaussian state using photon subtraction from squeezed vacuum beam, homodyne detection on the output light beam, and a coherent displacement of atomic state. The procedure is capable of non-deterministic preparation of a wide class of superpositions of atomic Dicke states. We present several techniques to optimize the performance of the protocol and maximize the trade-off between fidelity of prepared state and success probability of the scheme.

  13. Joseph Henry's Conception of Scientific Knowledge

    NASA Astrophysics Data System (ADS)

    Theerman, Paul

    1997-04-01

    Joseph Henry, America's premier physicist and physics teacher in the mid-nineteenth century, had decided views of scientific knowledge. These were expressed in two ways. First of all, scientific knowledge led to moral betterment. Thus the study of science was a morally good thing. This was not only because it led to the contemplation of God's creation, which was a standard reason justifying the study of science dating from the Scientific Revolution and even earlier. More importantly, the study of science itself was a moral discipline, imparting to scientists the habits and virtues of truthfulness, respect for others, care and diligence, and the discernment of meaningful patterns from experience. The moral ideals of science were expressed most strongly in Henry's upholding the international "Republic of Science"; conversely, cheapening science was a sign of moral failure. Second, for Henry and his generation, science provided a path to sure truth, separate from falsehood of both the politics and the quackery that characterized mid-century public life. Henry promoted this in his championing of the Smithsonian Institution a scientific establishment, against the ideas of others who wanted to make it a literary establishment or a training school for teachers. For Henry, the Smithsonian's scientific reputation would be established by relying on careful peer review in its publications, and supporting established scientists to write authoritative popular works. The purpose of both these activities was to raise the profile of science in the United States and further establish science and the scientific method as a guide to public life.

  14. Inwood Hill Park underpass, below Henry Hudson Parkway southbound, looking ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Inwood Hill Park underpass, below Henry Hudson Parkway southbound, looking southeast. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  15. City size and the Henry George theorem under monopolistic competition

    E-print Network

    Nesterov, Yurii

    rule' of local public finance, i.e., the Henry George theorem (HGT), does not hold in the second best, they show that the `golden rule' of local public finance, i.e., the Henry George theorem (henceforth, HGT

  16. History into Drama: The Perspective of "1 Henry IV."

    ERIC Educational Resources Information Center

    Champion, Larry S.

    1978-01-01

    Contrasts Shakespeare's "Henry V" and "Henry IV" series, in which human interaction becomes history, with plays such as "Julius Caesar," which focus on psychological analysis and the internalized protagonist. (MB)

  17. Review of Dick Vitale and Dick Weiss. Holding Court: Reflections of the Game I Love and John Feinstein. Winter Games.

    E-print Network

    Wedge, Philip

    1997-01-01

    to Home in the latter category. Christopher Moinet Dick Vitale with Dick Weiss. Holding Court: Reflections on the Game I hove. Indianapolis: Masters, 1995. 271 pp. $22.95. John Feinstein. Winter Games. Boston: Little, 1995. 277 pp. $21.95. In his... Introduction, Vitale stresses his "passion and enthusiasm" for basketball, and what ESPN viewer couldn't sense that in listening to the typical Vitale commentary? However, I felt less than enthusiastic about this book. Filled with tributes to coaches...

  18. Complete Genome Sequence of Leuconostoc carnosum Strain JB16, Isolated from Kimchi

    PubMed Central

    Jung, Ji Young; Lee, Se Hee

    2012-01-01

    Leuconostoc carnosum strain JB16 was isolated from kimchi, the traditional Korean fermented food. Here, we report the complete genome sequence of L. carnosum strain JB16, consisting of a 1,645,096-bp circular chromosome with a G+C content of 37.24% and four plasmids. PMID:23144413

  19. Complete Genome Sequence of Leuconostoc gelidum Strain JB7, Isolated from Kimchi

    PubMed Central

    Jung, Ji Young; Lee, Se Hee

    2012-01-01

    A strain of Leuconostoc gelidum, designated strain JB7, was isolated from kimchi, the representative Korean traditional fermented food. Here we announce the complete genome sequence of L. gelidum strain JB7, consisting of a 1,893,499-bp circular chromosome with a G+C content of 36.68%, and provide a description of its annotation. PMID:23144409

  20. Textiles and Costumes: Henry Art Gallery

    NSDL National Science Digital Library

    Costumes and Textiles is the first in a series of Digital Interactive Galleries (DIG) presented by the Henry Art Gallery at the University of Washington. These galleries are "experimental, web-based introductions to specific mediums, subjects, and issues in art and design, all illustrated with images of objects in the Henry's collection." The Costumes and Textiles series provides several ways to explore this area of museum collecting. For example, view images of garments worn for specific occasions, such as a strapless evening gown with a full skirt, designed by Norman Norell, seen in the pages of the February 1950 issue of Vogue magazine and once worn by Lauren Bacall. In the textile section, view examples by structure or by type of embellishment. Finally, explore the global connections of Henry Art Gallery objects using Google Earth.

  1. Duck Creek Riparian Habitat Restoration Project, Henry's Lake, Idaho

    E-print Network

    Duck Creek Riparian Habitat Restoration Project, Henry's Lake, Idaho Richard Prange Background Henrys Lake is located in eastern Idaho near Yellowstone Park and is nationally re nowned for its trophy conducive to growing large cutthroat, brook, and the famous Henrys Lake hybrid trout. The fishery has been

  2. UNIVERSITE HENRI POINCARE-NANCY I FACULTE DE MEDECINE

    E-print Network

    Paris-Sud XI, Université de

    UNIVERSITE HENRI POINCARE-NANCY I FACULTE DE MEDECINE THESE pour obtenir le grade de DOCTEUR DE L'UNIVERSITE HENRI POINCARE-NANCY I LABEL EUROPEEN Discipline : Bio ingénierie Présentée et soutenue publiquement par Henri-Pierre LASSALLE Le 07 juillet 2005 Etude des mécanismes du photoblanchiment de la 5

  3. JOURNES HENRI CAPITANT : Droit de la sant Aspects nouveaux

    E-print Network

    Spino, Claude

    JOURNÉES HENRI CAPITANT : Droit de la santé ­ Aspects nouveaux AVANT-PROPOS Les journées 2009 de l'Association Henri Capitant des Amis de la Culture Juridique Française ont eu lieu du 7 au 12 juin en Suisse, plus de l'Association Henri Capitant se terminent par une conférence de synthèse présentée par un

  4. Sous la direction de Pierre-Henri Gouyon

    E-print Network

    Sous la direction de Pierre-Henri Gouyon et Hélène Leriche l'environnement AUX ORIGINES DE Préface scientifique de Pierre-Henri Gouyon et Hélène Leriche Sous la direction éditoriale de Alexandrine Civard-Racinais Préface de Hubert Reeves Postface de Nicolas Hulot #12;4 LES DIRECTEURS SCIENTIFIQUES Pierre-Henri Gouyon

  5. Annales Henri Poincar A Journal of Theoretical and

    E-print Network

    Galloway, Greg

    1 23 Annales Henri Poincaré A Journal of Theoretical and Mathematical Physics ISSN 1424-0637 Ann. Henri Poincaré DOI 10.1007/s00023-013-0305-1 Achronal Limits, Lorentzian Spheres, and Splitting Gregory at link.springer.com". #12;Ann. Henri Poincar´e Online First c 2014 Springer Basel DOI 10.1007/s00023

  6. Lou Henry Hoover and the Girl Scouts: A Tribute.

    ERIC Educational Resources Information Center

    McMullin, Dare Stark

    This booklet is a special tribute to Lou Henry Hoover, wife of President Herbert Hoover, from a close friend, social secretary, and chief research assistant to the First Lady. The small booklet provides a look at the social history of the era by focusing on Lou Henry Hoover and her interest in the outdoors. Lou Henry Hoover was the first women to…

  7. Norbert Azuma-Dicke, IER, University of Stuttgart Poul Erik Morthorst, Ris National Laboratory

    E-print Network

    Norbert Azuma-Dicke, IER, University of Stuttgart Poul Erik Morthorst, Risø National Laboratory;Author: Norbert Azuma-Dicke, IER, University of Stuttgart; Poul Erik Morthorst, Risø National Laboratory

  8. From: Cannon, Dick Sent: Tuesday, October 18, 2011 8:50 AM

    E-print Network

    New Hampshire, University of

    From: Cannon, Dick Sent: Tuesday, October 18, 2011 8:50 AM To: UNH Managers Subject: FLEXIBLE WORK.work@unh.edu. Dick Cannon VP for Finance and Administration Chair of the UNH Flexible Work Arrangements Task Force

  9. Compilation of Henry's law constants, version 3.99

    NASA Astrophysics Data System (ADS)

    Sander, R.

    2014-11-01

    Many atmospheric chemicals occur in the gas phase as well as in liquid cloud droplets and aerosol particles. Therefore, it is necessary to understand the distribution between the phases. According to Henry's law, the equilibrium ratio between the abundances in the gas phase and in the aqueous phase is constant for a dilute solution. Henry's law constants of trace gases of potential importance in environmental chemistry have been collected and converted into a uniform format. The compilation contains 14775 values of Henry's law constants for 3214 species, collected from 639 references. It is also available on the internet at henrys-law.org">http://www.henrys-law.org.

  10. Stochastic local operations and classical communication properties of the n-qubit symmetric Dicke states

    E-print Network

    D. Li; X. Li; H. Huang; X. Li

    2009-10-28

    Recently, several schemes for the experimental creation of Dicke states were described. In this paper, we show that all the $n$-qubit symmetric Dicke states with $l$ ($2\\leq l\\leq (n-2)$) excitations are inequivalent to the $% |GHZ>$ state or the $|W>$ state under SLOCC, that the even $n$% -qubit symmetric Dicke state with $n/2$ excitations is inequivalent to any even $n$-qubit symmetric Dicke state with $l\

  11. Statespace Planning by Integer Optimization Henry Kautz

    E-print Network

    Kautz, Henry

    State­space Planning by Integer Optimization Henry Kautz AT&T Shannon Labs 180 Park Avenue Florham Park, NJ 07932, USA kautz@research.att.com Joachim P. Walser 1 i2 Technologies Airway Park, Lozenberg quality solutions for a set of hard benchmark logistics planning problems than had been found by any

  12. Statistical Mechanics Henri J.F. Jansen

    E-print Network

    Jansen, Henri J. F.

    Statistical Mechanics Henri J.F. Jansen Department of Physics Oregon State University October 12, 2008 #12;II #12;Contents 1 Foundation of statistical mechanics. 1 1.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 Program of statistical mechanics. . . . . . . . . . . . . . . . . . . 4 1.3 States of a system

  13. NASA's New Horizons Mission Dr. Henry Throop

    E-print Network

    Throop, Henry

    to Earth. New Horizons Spacecraft #12;#12;#12;#12;#12;#12;#12;New Horizons Team #12;#12;#12;#12;Lockheed;#12;#12;#12;#12;#12;#12;#12;#12;#12;New Horizons is the fastest spacecraft ever launched! Mission Time to get to the Moon's distanceNASA's New Horizons Mission To Pluto Dr. Henry Throop Planetary Science Institute Tucson

  14. Reprocessing Anaglyph Images Henry G Dietz

    E-print Network

    Dietz, Henry G. "Hank"

    Reprocessing Anaglyph Images Henry G Dietz Electrical and Computer Engineering, University easily can be modified to directly capture anaglyphs. Anaglyph images commonly have been used to encode stereo image pairs for viewing, but anaglyphs also can be treated as an efficient encoding of two

  15. Correspondence Henry E. Sigerist Owsei Temkin

    E-print Network

    Jäger, Gerhard

    medical curriculum with courses in philosophy. From 1925 on he also followed Henry E. Sigerist's courses assistant and the German citizenship. During the years Temkin shared with Sigerist in Leipzig (1925-1932) he tour in the U.S. in 1930/31 appointed him head of the department ad interim. In 1932 Sigerist had

  16. The Henry Barnard School Child Care Center.

    ERIC Educational Resources Information Center

    Rhode Island Coll., Providence.

    The Henry Barnard Child Care Center was established on the Rhode Island College campus to achieve the following main objectives: (a) to provide a comprehensive quality day care program for young children, (b) to serve as a model and resource for existing day care centers within the state, and (c) to provide specifically designed laboratory…

  17. California's Snow Zone Lands Henry W. Anderson

    E-print Network

    Standiford, Richard B.

    . . . . . . . . . . . . . . . . . . . . . . . . 13 Water Losses in Winter and Spring . . . . . . . . . . . . . . . . . . . . . . 13 Water Losses . . . . . . . . . . . . . . . . . . . . . . . . . 15 Water Savings in Summer . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Water LossesManaging California's Snow Zone Lands for Water Henry W. Anderson U S . F O R E S T S E R V I C E R

  18. Press Release EGU Press Release 04.01 EGU Contact: Dick van der Wateren

    E-print Network

    Renssen, Hans

    Press Release EGU Press Release 04.01 EGU Contact: Dick van der Wateren 17 March 2004 egu Drilling Project Leg 208. The ODP cruise, led by Dick Kroon of the Vrije Universiteit, Amsterdam, and James the first time, a group of scientists from the Vrije Universiteit Amsterdam, including Dick Kroon

  19. Dicke quantum spin glass of atoms and photons Philipp Strack and Subir Sachdev

    E-print Network

    Dicke quantum spin glass of atoms and photons Philipp Strack and Subir Sachdev Department interacting atoms and photons in optical cavities have rekindled interest in the Dicke model of atomic qubits coupled to discrete photon cavity modes. We study the multimode Dicke model with variable atom

  20. How Sister Celine Fasenmyer and Dick Duffin Shaped my Mathematical Personali* Doron ZEILBERGER1

    E-print Network

    Zeilberger, Doron

    How Sister Celine Fasenmyer and Dick Duffin Shaped my Mathematical Personali* *ty in common. Dick was re* *cognized as a leading applied mathematician, was a member of the National will prove her even greater. Dick Duffin's creative genius, while partly recognized, sure did not get

  1. Two-photon spectroscopy of trapped HD+ ions in the Lamb-Dicke regime

    E-print Network

    Paris-Sud XI, Université de

    Two-photon spectroscopy of trapped HD+ ions in the Lamb-Dicke regime Vu Quang Tran Laboratoire Lamb-Dicke regime. Sub-Doppler lines having widths in the 100 Hz range can be observed with good signal in the Lamb-Dicke regime where the confine- ment length is smaller than the wavelength. This condi- tion

  2. DICK THORNBURGH SUMMER FELLOWSHIP PROGRAM APPLICATION 2011 PLEASE TYPE OR PRINT

    E-print Network

    Sibille, Etienne

    DICK THORNBURGH SUMMER FELLOWSHIP PROGRAM APPLICATION 2011 PLEASE TYPE OR PRINT I. BACKGROUND AND OBJECTIVES OF THE THORNBURGH FELLOWSHIP The University Honors College and the Dick Thornburgh Forum for Law and Public Policy founded the DICK THORNBURGH SUMMER FELLOWSHIP Program in 2011 to provide a set

  3. DICKE COHERENT NARROWING IN TWO-PHOTON AND RAMAN SPECTROSCOPY OF THIN VAPOUR CELLS

    E-print Network

    Paris-Sud XI, Université de

    DICKE COHERENT NARROWING IN TWO-PHOTON AND RAMAN SPECTROSCOPY OF THIN VAPOUR CELLS Gabriel DUTIER of coherent Dicke narrowing in a thin vapour cell, in which sub-Doppler spectral lineshapes are observed under is provided between the Dicke narrowing with copropagating fields, and the residual Doppler

  4. How Sister Celine Fasenmyer and Dick Dun Shaped my Mathematical Personality Doron ZEILBERGER 1

    E-print Network

    Zeilberger, Doron

    How Sister Celine Fasenmyer and Dick DuÆn Shaped my Mathematical Personality Doron ZEILBERGER 1 Two.). Apart from their longevity, they seem to have nothing in common. Dick was recognized as a leading will prove her even greater. Dick DuÆn's creative genius, while partly recognized, sure did not get the full

  5. Two-photon spectroscopy of trapped HD+ ions in the Lamb-Dicke regime

    E-print Network

    Two-photon spectroscopy of trapped HD+ ions in the Lamb-Dicke regime Vu Quang Tran Laboratoire Lamb-Dicke regime. Sub-Doppler lines having widths in the 100 Hz range can be observed with good signal on trapped species in the Lamb-Dicke regime where the confine- ment length is smaller than the wavelength

  6. Non-Singular BRANS-DICKE-? Cosmology

    NASA Astrophysics Data System (ADS)

    Alexeyev, Stanislov O.; Tretyakova, Darya A.; Shatskiy, Alexander A.; Novikov, Igor D.

    2015-01-01

    We discuss a Brans-Dicke model with a cosmological constant, negative value of the w parameter and an arbitrary (in general non-vanishing) scale factor at the Big Bang. The Friedman equations for a flat universe are considered. The current observational values for Hubble constant H0 and deceleration parameter q0 play the role of initial conditions. We follow the approach of Ref. 1 in order to solve field equations analytically. In Ref. 1 only positive values of w were considered, we extend the study to a complete set of possible w values. Our main result is that the scale factor (during it's evolution back in time direction) may not vanish, unlike in the standard ?CDM case. In other words, the considered model demonstrates a cosmological bounce instead of the initial singularity. The famous formula, that leads to the bounce, is valid only for the dust-filled universe with p = 0 and, therefore, is not adequate for the Early Universe hot stage when the bounce happens. So, our results are qualitative in nature and must be used to obtain initial values for the hot stage of the Universe.

  7. Cosmological constraints on Brans-Dicke theory.

    PubMed

    Avilez, A; Skordis, C

    2014-07-01

    We report strong cosmological constraints on the Brans-Dicke (BD) theory of gravity using cosmic microwave background data from Planck. We consider two types of models. First, the initial condition of the scalar field is fixed to give the same effective gravitational strength Geff today as the one measured on Earth, GN. In this case, the BD parameter ? is constrained to ?>692 at the 99% confidence level, an order of magnitude improvement over previous constraints. In the second type, the initial condition for the scalar is a free parameter leading to a somewhat stronger constraint of ?>890, while Geff is constrained to 0.981

  8. On Stationary Axially Symmetric Solutions in Brans-Dicke Theory

    E-print Network

    Kirezli, P?nar

    2015-01-01

    Stationary axially symmetric Brans-Dicke-Maxwell solutions are re-examined in the framework of the Brans-Dicke theory. We see that, employing a particular parametrization of the standard axially symmetric metric simplifies the procedure of obtaining the Ernst equations for axially symmetric electro-vacuum space-times for this theory. This analysis also permit us to construct a two parameter extension in both Jordan and Einstein frames of an old solution generating technique frequently used to construct axially symmetric solutions for Brans-Dicke theory from a seed solution of General Relativity. As applications of this technique, several known and new solutions are constructed including a general axially symmetric BD-Maxwell solution of Plebanski-Demianski with vanishing cosmological constant, i.e. the Kinnersley solution and general magnetized Kerr-Newman type solutions. Some physical properties and circular motion of test particles for a particular subclass of Kinnersley solution, i.e. Kerr-Newman-NUT type ...

  9. Measurement of Dicke Narrowing in Electromagnetically Induced Transparency

    E-print Network

    M. Shuker; O. Firstenberg; R. Pugatch; A. Ben-Kish; A. Ron; N. Davidson

    2007-03-13

    Dicke narrowing is a phenomena that dramatically reduces the Doppler width of spectral lines, due to frequent velocity-changing collisions. A similar phenomena occurs for electromagnetically induced transparency (EIT) resonances, and facilitates ultra-narrow spectral features in room-temperature vapor. We directly measure the Dicke-like narrowing by studying EIT line-shapes as a function of the angle between the pump and the probe beams. The measurements are in good agreement with an analytic theory with no fit parameters. The results show that Dicke narrowing can increase substantially the tolerance of hot-vapor EIT to angular deviations. We demonstrate the importance of this effect for applications such as imaging and spatial solitons using a single-shot imaging experiment, and discuss the implications on the feasibility of storing images in atomic vapor.

  10. The Life and Times of Dick Ruggles: The Disappearance of the Squire's Ham and Other Village Stories

    E-print Network

    Lanham, Neil

    Dick and Dolly Ruggles live in a thatched cottage in the centre of the Essex village of Toppesfield. The cottage belonged to Dick's grandfather and it was here that Dick's mother was born and it was here that she died 72 years later. Dick was born...

  11. Coherence transition of small Josephson junctions coupled to a single-mode resonant cavity: Connection to the Dicke model

    E-print Network

    Stroud, David

    : Connection to the Dicke model Kohjiro Kobayashi, David Stroud * Department of Physics, Ohio State University Electromagnetic cavity Phase coherence Dicke model Coherent state a b s t r a c t We calculate the thermodynamic onto the Dicke model of quantum optics. The second is a modified Dicke model which contains

  12. Experimental entanglement of a six-photon symmetric Dicke state

    E-print Network

    Witlef Wieczorek; Roland Krischek; Nikolai Kiesel; Patrick Michelberger; Geza Toth; Harald Weinfurter

    2009-07-16

    We report on the experimental observation and characterization of a six-photon entangled Dicke state. We obtain a fidelity as high as 0.654$\\pm$0.024 and prove genuine six-photon entanglement by, amongst others, a two-setting witness yielding -0.422$\\pm$0.148. This state has remarkable properties; e.g., it allows obtaining inequivalent entangled states of a lower qubit number via projective measurements, and it possesses a high entanglement persistency against qubit loss. We characterize the properties of the six-photon Dicke state experimentally by detecting and analyzing the entanglement of a variety of multipartite entangled states.

  13. Level statistics of a pseudo-Hermitian Dicke model

    E-print Network

    Tetsuo Deguchi; Pijush K. Ghosh; Kazue Kudo

    2009-07-24

    A non-Hermitian operator that is related to its adjoint through a similarity transformation is defined as a pseudo-Hermitian operator. We study the level-statistics of a pseudo-Hermitian Dicke Hamiltonian that undergoes Quantum Phase Transition (QPT). We find that the level-spacing distribution of this Hamiltonian near the integrable limit is close to Poisson distribution, while it is Wigner distribution for the ranges of the parameters for which the Hamiltonian is non-integrable. We show that the assertion in the context of the standard Dicke model that QPT is a precursor to a change in the level statistics is not valid in general.

  14. Brans-Dicke theory: Jordan vs Einstein Frame

    E-print Network

    A. Bhadra; K. Sarkar; D. P. Datta; K. K. Nandi

    2006-05-19

    It is well known that, in contrast to general relativity, there are two conformally related frames, the Jordan frame and the Einstein frame, in which the Brans-Dicke theory, a prototype of generic scalar-tensor theory, can be formulated. There is a long standing debate on the physical equivalence of the formulations in these two different frames. It is shown here that gravitational deflection of light to second order accuracy may observationally distinguish the two versions of the Brans-Dicke theory.

  15. Inflation and dark energy from the Brans-Dicke theory

    E-print Network

    Michal Artymowski; Zygmunt Lalak; Marek Lewicki

    2014-12-27

    We consider the Brans-Dicke theory motivated by the $f(R) = R + \\alpha R^n - \\beta R^{2-n}$ model to obtain a stable minimum of the Einstein frame scalar potential of the Brans-Dicke field. As a result we have obtained an inflationary scalar potential with non-zero value of residual vacuum energy, which may be a source of Dark Energy. In addition we discuss the probability of quantum tunnelling from the minimum of the potential. Our results can be easily consistent with PLANCK or BICEP2 data for appropriate choices of the value of $n$ and $\\omega$.

  16. Inflation and dark energy from the Brans-Dicke theory

    NASA Astrophysics Data System (ADS)

    Artymowski, Micha?; Lalak, Zygmunt; Lewicki, Marek

    2015-06-01

    We consider the Brans-Dicke theory motivated by the f(R) = R + ? Rn ? ? R2?n model to obtain a stable minimum of the Einstein frame scalar potential of the Brans-Dicke field. As a result we have obtained an inflationary scalar potential with non-zero value of residual vacuum energy, which may be a source of dark energy. In addition we discuss the probability of quantum tunnelling from the minimum of the potential. Our results can be easily consistent with PLANCK or BICEP2 data for appropriate choices of the value of n and ?.

  17. Cosmic Evolution in a Modified Brans-Dicke Theory

    E-print Network

    Yousef Bisabr

    2012-01-09

    We consider Brans-Dicke theory with a self-interacting potential in Einstein conformal frame. We introduce a class of solutions in which an accelerating expansion is possible in a spatially flat universe for positive and large values of the Brans-Dicke parameter consistent with local gravity experiments. In this Einstein frame formulation, the theory appears as an interacting quintessence model in which the interaction term is given by the conformal transformation. In such an interacting model, we shall show that the solutions lead simultaneously to a constant ratio of energy densities of matter and the scalar field.

  18. Dynamics of false vacuum bubbles in Brans-Dicke theory

    SciTech Connect

    Lee, Bum-Hoon; Lee, Wonwoo [Department of Physics and BK21 Division and Center for Quantum Spacetime, Sogang University, Seoul 121-742 (Korea, Republic of); Yeom, Dong-han, E-mail: bhl@sogang.ac.kr, E-mail: warrior@sogang.ac.kr, E-mail: innocent@muon.kaist.ac.kr [Department of Physics, KAIST, Daejeon 305-701 (Korea, Republic of)

    2011-01-01

    We study the dynamics of false vacuum bubbles in the Brans-Dicke theory of gravity by using the thin shell or thin wall approximation. We consider a false vacuum bubble that has a different value for the Brans-Dicke field between the inside false vacuum region and the outside true vacuum region. Within a certain limit of field values, the difference of field values makes the effective tension of the shell negative. This allows new expanding false vacuum bubbles to be seen by the outside observer, which are disallowed in Einstein gravity.

  19. Quantum phase transition in a pseudo-Hermitian Dicke model

    SciTech Connect

    Deguchi, Tetsuo [Department of Physics, Graduate School of Humanities and Sciences, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo-ku, Tokyo 112-8610 (Japan); Ghosh, Pijush K. [Department of Physics, Siksha-Bhavana, Visva-Bharati University, Santiniketan PIN 731235 (India)

    2009-08-15

    We show that a Dicke-type non-Hermitian Hamiltonian admits entirely real spectra by mapping it to the 'dressed Dicke model' through a similarity transformation. We find a positive-definite metric in the Hilbert space of the non-Hermitian Hamiltonian so that the time evolution is unitary and allows a consistent quantum description. We then show that this non-Hermitian Hamiltonian describing nondissipative quantum processes undergoes quantum phase transition. The exactly solvable limit of the non-Hermitian Hamiltonian has also been discussed.

  20. Paired defects of nematic surfactant bilayers J.-B. Fournier and L. Peliti*

    E-print Network

    Fournier, Jean-Baptiste - Laboratoire Matière et Systèmes Complexes, Université Paris 7

    recently it has been shown that amphiphilic bilayers made of dimeric surfactants gemini spontaneously formPaired defects of nematic surfactant bilayers J.-B. Fournier and L. Peliti* Laboratoire de Physico

  1. Henry's law constants for the polychlorinated biphenyls

    SciTech Connect

    Burkhard, L.P.; Armstrong, D.E.; Andren, A.W.

    1985-07-01

    Henry's law constants were predicted from the ratio of the liquid (or subcooled liquid) vapor pressure and aqueous solubility for each polychlorinated biphenyl (PCB) congener. The liquid vapor pressures and aqueous solubilities were derived for each PCB congener by using correlations of Gibbs' free energy of vaporization against gas-liquid chromatographic retention indexes and Gibbs' free energy of solubilization of a liquid against molecular surface area. The predicted values were in fair agreement with experimental values, and the error for these constants was estimated to be a factor of 5 in the temperature range 0.0-40.0 /sup 0/C. For the PCB congeners, Henry's law constants were independent of molecular weight and increased approximately an order of magnitude with a 25.0 /sup 0/C increase in temperature. The average value for Henry's law constants and air-water partition coefficients for the Aroclor PCB mixtures were approximately 4.0 x 10/sup -4/ atm.m/sup 3//mol at 25.0 /sup 0/C.

  2. View of fourlane Henry Hudson Parkway winding through Riverdale, showing ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of four-lane Henry Hudson Parkway winding through Riverdale, showing service roads, from White Hall Cooperative Apartments. Henry Hudson Bridge, Inwood Hill Park, the Cloisters and Fort Tryon Park, George Washington Bridge, and Manhattan skyline in background, looking southwest. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  3. Brans-Dicke gravity theory from topological gravity

    NASA Astrophysics Data System (ADS)

    Inostroza, C.; Salazar, A.; Salgado, P.

    2014-06-01

    We consider a model that suggests a mechanism by which the four dimensional Brans-Dicke gravity theory may emerge from the topological gravity action. To achieve this goal, both the Lie algebra and the symmetric invariant tensor that define the topological gravity Lagrangian are constructed by means of the Lie algebra S-expansion procedure with an appropriate abelian semigroup S.

  4. Some aspects of cylindrical solutions in Brans-Dicke gravity

    E-print Network

    Andres Arazi; Claudio Simeone

    2011-02-17

    Several points regarding cylindrical Brans-Dicke geometries are studied. The issue of particle trajectories for the vacuum cylindrical solution is revisited. The possible particular nature of a global string metric is analysed. The general form of the junction conditions for matching cylindrical solutions within this theory is written down, and the relation with the general relativity limit is discussed.

  5. Wiggly Strings in Linearized Brans-Dicke Gravity

    E-print Network

    Andres Arazi; Claudio Simeone

    2004-02-19

    The metric around a wiggly cosmic string is calculated in the linear approximation of Brans-Dicke theory of gravitation. The equations of motion for relativistic and non-relativistic particles in this metric are obtained. Light propagation is also studied and it is shown that photon trajectories can be bounded.

  6. A Note on Brans-Dicke Cosmology with Axion

    Microsoft Academic Search

    Sudipta Mukherji

    1997-01-01

    We study the Brans-Dicke model in the presence of an axion. The dynamical equations are solved when the fields are space-independent and the metric is spatially flat. It is found that at late time the scale factor undergoes decelerated expansion but the dilaton grows large. At early time, scale factor and the dilaton approach constants.

  7. APS/123-QED Spin-squeezing and Dicke state preparation

    E-print Network

    on a heterodyne detection and show that the induced back-action allows to prepare both spin- squeezed and Dicke by a Monte-Carlo simulation. The experimental implementation of the proposed heterodyne detection scheme and simultaneous interaction with several op- tical frequencies [18], or cavity transmission modulation [9

  8. Vacuum less global monopole in Brans-Dicke theory

    E-print Network

    F. Rahaman; M. Kalam; R. Mukherjee; S. Das; T. Roy

    2007-02-28

    In the present work, the gravitational field of a vacuum less global monopole has been investigated in Brans-Dicke theory under weak field assumption of the field equations. It has been shown that the vacuum less global monopole exerts attractive gravitational effects on a test particle. It is dissimilar to the case studied in general relativity.

  9. Global Monopoles in Brans-Dicke Theory of Gravity

    E-print Network

    A. Barros; C. Romero

    1997-09-24

    The gravitational field of a global monopole in the context of Brans-Dicke theory of gravity is investigated. The space-time and the scalar field generated by the monopole are obtained by solving the field equations in the weak field approximation. A comparison is made with the corresponding results predicted by General Relativity.

  10. The Dick and Carey Model: Will It Survive the Decade?

    ERIC Educational Resources Information Center

    Dick, Walter

    1996-01-01

    Reviews changes in the original Dick and Carey model of instructional design and considers its future usefulness. Topics include alternative instructional design textbooks, the influence of constructivist theory on the 1996 version of the model with its systems approach, and the influence of constructivist and objectivist models. (Author/LRW)

  11. Composite wormholes in vacuum Jordan-Brans-Dicke theory

    E-print Network

    S. M. Kozyrev; S. V. Sushkov

    2008-12-30

    New classes composite vacuum wormhole solutions of Jordan-Brans-Dicke gravitation is presented and analysed. It is shown that such solution holds for both, a bridge between separated Schwarzschild and Brans Universes and for a bridge connecting two Schwarzschild asymptotically flat regions joined by Brans throat. We have also noticed that there are some new possible candidates for wormhole spacetimes.

  12. Using Herman Melville's "Moby-Dick" to Explore Geographic Themes

    ERIC Educational Resources Information Center

    Gesler, Wil

    2004-01-01

    The classic American novel, Herman Melville's "Moby-Dick", can be used in geography and English classes at the high school and college levels to explore five themes that have a geographic component or are of interest to geography students: (1) the journey, (2) human/environment interactions, (3) social relationships in space, (4) acquiring…

  13. The Life and Times of Dick Ruggles: Gamekeeping Tales

    E-print Network

    Lanham, Neil

    returned with stories. Dick Ruggles is both. He is a keeper and custodian of the inherited tradition of his area (called Seanachie in Ireland).His stories are as passed on (some from his mother etc and some are folk tales) or from his experience of life...

  14. Composite spherically symmetric configurations in Jordan-Brans-Dicke theory

    E-print Network

    S. Kozyrev

    2010-09-23

    In this article, a study of the scalar field shells in relativistic spherically symmetric configurations has been performed. We construct the composite solution of Jordan-Brans-Dicke field equation by matching the conformal Brans solutions at each junction surfaces. This approach allows us to associate rigorously with all solutions as a single glued "space", which is a unique differentiable manifold M^4.

  15. The Life and Times of Dick Ruggles: Village Life

    E-print Network

    Lanham, Neil

    returned with stories. Dick Ruggles is both. He is a keeper and custodian of the inherited tradition of his area (called Seanachie in Ireland).His stories are as passed on (some from his mother etc and some are folk tales) or from his experience of life...

  16. Embedding Brans-Dicke gravity into electroweak theory

    E-print Network

    M. N. Chernodub; Antti J. Niemi

    2008-06-27

    We argue that a version of the four dimensional Brans-Dicke theory can be embedded in the standard flat spacetime electroweak theory. The embedding involves a change of variables that separates the isospin from the hypercharge in the electroweak theory.

  17. The Life and Times of Dick Ruggles: Lord Sainsbury's Gardener

    E-print Network

    Lanham, Neil

    returned with stories. Dick Ruggles is both. He is a keeper and custodian of the inherited tradition of his area (called Seanachie in Ireland).His stories are as passed on (some from his mother etc and some are folk tales) or from his experience of life...

  18. The Truth of the Thing: Nonfiction in "Moby Dick"

    ERIC Educational Resources Information Center

    Hilbert, Betsy

    1986-01-01

    Looks at Melville's narrative construction of "onion-like...layers of truth" that combine romance and textbook, presents critics' discussion and scholars' treatment of the cetological information present in the text, offers an explanation for the lack of recognition due to the nonfictional parts of "Moby Dick." (JK)

  19. pidmiologie 210 A. Grolla, A. Lucht, D. Dick et al.

    E-print Network

    Paris-Sud XI, Université de

    �pidémiologie 210 A. Grolla, A. Lucht, D. Dick et al. Ebola virus circulation in Africa: a balance investigated in the early 1980s, using extensive survey: Central African Republic (CAR), Cameroon, Chad, Congo contacts with humans and non-human primates. However various serological investigations showed a high

  20. An extended geometric criterion for chaos in the Dicke model

    NASA Astrophysics Data System (ADS)

    Li, Jiangdan; Zhang, Suying

    2010-03-01

    We extend HBLSL's (Horwitz, Ben Zion, Lewkowicz, Schiffer and Levitan) new Riemannian geometric criterion for chaotic motion to Hamiltonian systems of weak coupling of potential and momenta by defining the 'mean unstable ratio'. We discuss the Dicke model of an unstable Hamiltonian system in detail and show that our results are in good agreement with that of the computation of Lyapunov characteristic exponents.

  1. Cosmic Evolution in Generalised Brans-Dicke Theory

    E-print Network

    B. K. Sahoo; L. P. Singh

    2002-11-12

    We have studied the Generalised Brans-Dicke theory and obtained exact solutions of a(t),phi(t),and omega(t) for different epochs of the cosmic evolution .We discuss how inflation,decceleration,cosmic acceleration can result from this solution.The time variation of G(t) is also examined.

  2. Intuitionistic Logic Nick Bezhanishvili and Dick de Jongh

    E-print Network

    de Jongh, Dick

    Intuitionistic Logic Nick Bezhanishvili and Dick de Jongh Institute for Logic, Language of Heyting and closure algebras . . . . . . . . . . 40 5 Jankov formulas and intermediate logics 42 5.1 n . . . . . . . . . . . . . . . . . . . . . . . . . 46 5.4 Applications of Jankov formulas . . . . . . . . . . . . . . . . . . . 47 5.5 The logic

  3. Some general results in modified Brans-Dicke cosmologies

    NASA Astrophysics Data System (ADS)

    Singh, T.; Singh, T.

    1983-11-01

    Analytical investigations of modified Brans-Dicke (MBD) cosmological models are presented. The models considered contain perfect fluid and obey either the MBD equations (Endo and Fukui, 1977; Bergmann, 1968; Waboner, 1970) or the MBD equations with the cosmological constant of Uehara and Kim (1982). Raychaudhuri-type equations are written and general theorems are proved for both types of models.

  4. Impurity in a bosonic Josephson junction: Swallowtail loops, chaos, self-trapping, and Dicke model

    NASA Astrophysics Data System (ADS)

    Mumford, Jesse; Larson, Jonas; O'Dell, D. H. J.

    2014-02-01

    We study a model describing N identical bosonic atoms trapped in a double-well potential together with a single-impurity atom, comparing and contrasting it throughout with the Dicke model. As the boson-impurity coupling strength is varied, there is a symmetry-breaking pitchfork bifurcation which is analogous to the quantum phase transition occurring in the Dicke model. Through stability analysis around the bifurcation point, we show that the critical value of the coupling strength has the same dependence on the parameters as the critical coupling value in the Dicke model. We also show that, like the Dicke model, the mean-field dynamics goes from being regular to chaotic above the bifurcation and macroscopic excitations of the bosons are observed. Although the boson-impurity system behaves like a poor man's version of the Dicke model, we demonstrate a self-trapping phenomenon which thus far has not been discussed in the realm of the Dicke model.

  5. Nonclassical effects in a highly nonlinear generalized homogeneous Dicke model

    SciTech Connect

    Grinberg, Horacio, E-mail: grinberg@df.uba.ar

    2011-11-15

    An intensity dependent nonlinear coupling model of N two-level atoms (generalized Dicke model) interacting dispersively with a bimodal cavity field via two-photon transitions is investigated in a scenario where the rotating wave approximation is assumed. The model becomes homogeneous in the sense that the spin transition frequency is the same for all atoms and the coupling constants emerging from the collective interactions of the atomic system with the cavity field depend only on the particular radiation field mode. This allows us to represent the Dicke Hamiltonian entirely in terms of the total angular momentum J. It is assumed that, initially, the atomic system and the field are in a disentangled state where the field modes are in Glauber coherent states and the atomic system is a superposition of states |JM> (Dicke states). The model is numerically tested against simulations of normal squeezing variance of the field, squeezing factors based on the Heisenberg uncertainty principle, along with the statistical properties of the light leading to the possible production of nonclassical effects, such as degree of second-order coherence in the modes, degree of intermode correlation, as well as violation of the Cauchy-Schwartz inequality. Analytical expression of the total density operator matrix elements at t>0 shows the present nonlinear model to be strongly entangled, which is reflected in the time evolution of the linear entropy, where the superposition states are reduced to statistical mixtures. Thus, the present generalized Dicke model does not preserve the modulus of the Bloch vector. The computations, performed in the weak coupling and strong field limits, were conducted via second-order Dyson perturbative expansion of the time evolution operator matrix elements for the totality of the angular momentum states of the atomic system. - Highlights: > The present highly nonlinear generalized Dicke model involves two-photon transitions. > Quantum coherences significantly affect the dynamics of the atomic system. > At t>0 the time-dependent density operator matrix becomes strongly entangled. > Linear entropy shows that the superposition states turn into statistical mixtures. > The present Dicke model does not preserve the modulus of the Bloch vector.

  6. UNIVERSITE HENRI POINCARE-NANCY I FACULTE DE MEDECINE

    E-print Network

    Boyer, Edmond

    UNIVERSITE HENRI POINCARE-NANCY I FACULTE DE MEDECINE THESE pour obtenir le grade de DOCTEUR DE L'UNIVERSITE HENRI POINCARE-NANCY I Discipline : Bio ingénierie Présentée et soutenue publiquement par Siarhei. Thermodynamics of sensitizers redistribution between plasma proteins. Eyring theory

  7. Henry Hudson Bridge toll plaza, upper level, looking west. Pipe ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Bridge toll plaza, upper level, looking west. Pipe railing parapets and pedestrian walkway on left. Inwood Hill Park in background. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  8. View of cars entering Henry Hudson Parkway southbound at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of cars entering Henry Hudson Parkway southbound at the Mosholu Parkway interchange, with outcropping in northwest Van Cortlandt Park in background, looking north. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  9. West Harlem Walk (Hudson River Valley Greenway) beneath Henry Hudson ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    West Harlem Walk (Hudson River Valley Greenway) beneath Henry Hudson Parkway (HHP) Viaduct at West 155th Street vicinity, with Palisades, George Washington Bridge, and Little Red Lighthouse (visible to left of bridge tower) in background, looking northeast. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  10. View of Harlem River Shipping Canal from Henry Hudson Bridge, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of Harlem River Shipping Canal from Henry Hudson Bridge, looking southeast. Isham Park in center, Inwood Hill Park at right. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  11. Henry Hudson Bridge upper deck and pedestrian walkway showing parapets ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Bridge upper deck and pedestrian walkway showing parapets with pipe rails. View of Inwood Hill Park in background, with a faint view of the Empire State Building amidst distant highrises at left, looking south. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  12. Henry Hudson Bridge over Harlem River Shipping Canal at confluence ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Henry Hudson Bridge over Harlem River Shipping Canal at confluence with Hudson River, from Isham Park, view northeast. Inwood Hill Park on left, Spuyten Duyvil Shorefront Park on right, Palisades Interstate Park in background. - Henry Hudson Parkway, Extending 11.2 miles from West 72nd Street to Bronx-Westchester border, New York, New York County, NY

  13. Memory Drum Theory's C Movement: Revelations from Franklin Henry

    ERIC Educational Resources Information Center

    Fischman, Mark G.; Christina, Robert W.; Anson, J. Greg

    2008-01-01

    Franklin Henry's "memory drum" theory of neuromotor reaction (Henry & Rogers, 1960) was one of the most influential studies of the response programming stage of information processing. The paper is the most-cited study ever published in the "Research Quarterly for Exercise and Sport." However, few people know there is a noteworthy error in the…

  14. Henry Kandrup's Ideas About Relaxation of Stellar Systems

    E-print Network

    David Merritt

    2005-02-14

    Henry Kandrup wrote prolifically on the problem of relaxation of stellar systems. His picture of relaxation was significantly more refined than the standard description in terms of phase mixing and violent relaxation. In this article, I summarize Henry's work in this and related areas.

  15. Teaching Students about the Environment with Henry David Thoreau

    ERIC Educational Resources Information Center

    Curriculum Review, 2008

    2008-01-01

    "Walden: The Ballad of Thoreau" is a two-act four-character play about the final two days writer Henry David Thoreau spent in his cabin before leaving Walden Pond. Teachers can use this play to teach about preserving the earth to students. This article presents a brief synopsis of the play and a brief biography of Henry David Thoreau.

  16. The Rice University Press Initiative: An Interview with Charles Henry

    ERIC Educational Resources Information Center

    Trevitte, Chad; Henry, Charles

    2007-01-01

    In this interview Charles Henry, publisher of the Rice University Press (RUP), discusses RUP's rebirth as a fully digital university press. Henry addresses the circumstances that led to this decision, and he further outlines the RUP business model whereby the press will publish its own titles--both digitally and in print-on-demand--while…

  17. Brans-Dicke theory of gravity with torsion: A possible solution of the $?$-problem

    E-print Network

    Yu-Huei Wu; Chih-Hung Wang

    2012-11-15

    We study the Brans-Dicke theory of gravity in Riemann-Cartan space-times, and obtain general torsion solutions, which are completely determined by Brans-Dicke scalar field $\\Phi$, in the false vacuum energy dominated epoch. The substitution of the torsion solutions back to our action gives the original Brans-Dicke action with $\\Phi$-dependent Brans-Dicke parameter $\\omega(\\Phi)$. The evolution of $\\omega(\\Phi)$ during the inflation is studied and it is found that $\\omega$ approaches to infinity at the end of inflation. This may solve the $\\omega$-problem in the extended inflation model.

  18. Interacting holographic dark energy in Brans-Dicke theory

    E-print Network

    Ahmad Sheykhi

    2009-10-03

    We study cosmological application of interacting holographic energy density in the framework of Brans-Dicke cosmology. We obtain the equation of state and the deceleration parameter of the holographic dark energy in a non-flat universe. As system's IR cutoff we choose the radius of the event horizon measured on the sphere of the horizon, defined as $L=ar(t)$. We find that the combination of Brans-Dicke field and holographic dark energy can accommodate $w_D = -1 $ crossing for the equation of state of \\textit{noninteracting} holographic dark energy. When an interaction between dark energy and dark matter is taken into account, the transition of $w_D$ to phantom regime can be more easily accounted for than when resort to the Einstein field equations is made.

  19. Preparation of Dicke States in an Ion Chain

    E-print Network

    D. B. Hume; C. W. Chou; T. Rosenband; D. J. Wineland

    2009-08-31

    We have investigated theoretically and experimentally a method for preparing Dicke states in trapped atomic ions. We consider a linear chain of $N$ ion qubits that is prepared in a particular Fock state of motion, $|m>$. The $m$ phonons are removed by applying a laser pulse globally to the $N$ qubits, and converting the motional excitation to $m$ flipped spins. The global nature of this pulse ensures that the $m$ flipped spins are shared by all the target ions in a state that is a close approximation to the Dicke state $\\D{N}{m}$. We calculate numerically the fidelity limits of the protocol and find small deviations from the ideal state for $m = 1$ and $m = 2$. We have demonstrated the basic features of this protocol by preparing the state $\\D{2}{1}$ in two $^{25}$Mg$^+$ target ions trapped simultaneously with an $^{27}$Al$^+$ ancillary ion.

  20. Unified dark fluid in Brans-Dicke theory

    NASA Astrophysics Data System (ADS)

    Tripathy, Sunil K.; Behera, Dipanjali; Mishra, Bivudutta

    2015-04-01

    Anisotropic dark energy cosmological models are constructed in the frame work of generalised Brans-Dicke theory with a self-interacting potential. A unified dark fluid characterised by a linear equation of state is considered as the source of dark energy. The shear scalar is considered to be proportional to the expansion scalar simulating an anisotropic relationship among the directional expansion rates. The dynamics of the universe in the presence of a unified dark fluid in anisotropic background have been discussed. The presence of an evolving scalar field makes it possible to get an accelerating phase of expansion even for a linear relationship among the directional Hubble rates. It is found that the anisotropy in expansion rates does not affect the scalar field, the self-interacting potential, but it controls the non-evolving part of the Brans-Dicke parameter.

  1. Unified dark fluid in Brans-Dicke theory

    E-print Network

    Sunil K. Tripathy; Dipanjali Behera; Bivudutta Mishra

    2015-03-30

    Anisotropic dark energy cosmological models are constructed in the frame work of generalised Brans-Dicke theory with a self interacting potential. Wet dark fluid characterized by a linear equation of state is considered as the source of dark energy. Shear scalar is considered to be proportional to the expansion scalar simulating an anisotropic relationship among the directional expansion rates. The dynamics of the universe in presence of wet dark fluid in anisotropic background have been discussed. The presence of evolving scalar field makes it possible to get accelerating phase of expansion even for a linear relationship among the directional Hubble rates. It is found that, the anisotropy in expansion rates does not affect the scalar field, self interacting potential but it controls the non-evolving part of the Brans- Dicke parameter.

  2. Quantum nonreciprocity of nanoscale antenna arrays in timed Dicke states.

    PubMed

    Slepyan, Gregory Y; Boag, Amir

    2013-07-12

    We predict a linear nonreciprocal effect that is based on the timed Dicke states in an ensemble of dipole-dipole coupled oscillators. This effect is examined on a nanoscale antenna array comprising two-level identical emitters. The studied nonreciprocity, which has no analogs in classical antennas, manifests itself in strong characteristic asymmetry of the radiation pattern, even for a single-photon laser pumping. Promising applications of our results for remotely tunable nanoantennas and nanocircuit elements are discussed. PMID:23889399

  3. Cylindrical sources in full Einstein and Brans-Dicke gravity

    E-print Network

    Andres Arazi; Claudio Simeone

    2000-05-09

    It was shown by Hiscock that the energy-momentum tensor commonly used to model local cosmic strings in linearized Einstein gravity can be extended and used in the full theory, obtaining a metric in the exterior of the source with the same deficit angle. Here we show that this tensor is an exception within a family for which a static solution does not exist in full Einstein nor in Brans-Dicke gravity.

  4. On the the phenomenology of extended Brans-Dicke Gravity

    E-print Network

    Lima, Nelson A

    2015-01-01

    We introduce a designer approach for extended Brans-Dicke gravity and use it to construct a semi-analytic model for the effective equation of state, the effective Newton's constant at the background and at the linear level and the gravitational slip. By doing so, we are able to explore the dependence of these four phenomenological parameters on more fundamental parameters of the theory.

  5. Brans-Dicke wormholes in the Jordan and Einstein frames

    Microsoft Academic Search

    K. K. Nandi; B. Bhattacharjee; S. M. K. Alam; J. Evans

    1998-01-01

    We examine the possibility of static wormhole solutions in the vacuum Brans-Dicke theory both in the original (Jordan) frame and in the conformally rescaled (Einstein) frame. It turns out that, in the former frame, wormholes exist only in a very narrow interval of the coupling parameter, viz., -3\\/2

  6. Accurate numerical solution to the finite-size Dicke model

    E-print Network

    Qing-Hu Chen; Yu-Yu Zhang; Tao Liu; Ke-Lin Wang

    2008-09-30

    By using extended bosonic coherent states, a new technique to solve the Dicke model exactly is proposed in the numerical sense. The accessible system size is two orders of magnitude higher than that reported in literature. Finite-size scaling for several observables, such as the ground-state energy, Berry phase, and concurrence are analyzed. The existing discrepancy for the scaling exponent of the concurrence is reconciled.

  7. FRW cosmology from five dimensional vacuum Brans–Dicke theory

    Microsoft Academic Search

    Amir F. Bahrehbakhsh; Mehrdad Farhoudi; Hossein Shojaie

    2011-01-01

    We follow the approach of induced-matter theory for a five-dimensional (5D) vacuum Brans–Dicke theory and introduce induced-matter and induced potential in four dimensional (4D) hypersurfaces, and then employ a generalized FRW type solution. We confine ourselves to the scalar field and scale factors\\u000a be functions of the cosmic time. This makes the induced potential, by its definition, vanishes, but the

  8. Structure formation constraints on the Jordan-Brans-Dicke theory

    E-print Network

    Viviana Acquaviva; Carlo Baccigalupi; Samuel M. Leach; Andrew R. Liddle; Francesca Perrotta

    2005-05-09

    We use cosmic microwave background data from WMAP, ACBAR, VSA and CBI, and galaxy power spectrum data from 2dF, to constrain flat cosmologies based on the Jordan-Brans-Dicke theory, using a Markov Chain Monte Carlo approach. Using a parametrization based on \\xi=1/4\\omega, and performing an exploration in the range \\ln\\xi \\in [-9,3], we obtain a 95% marginalized probability bound of \\ln\\xi 120.

  9. Dynamics and cosmological constraints on Brans-Dicke cosmology

    E-print Network

    Orest Hrycyna; Marek Szydlowski; Michal Kamionka

    2014-11-26

    We investigate observational constraints on the Brans-Dicke cosmological model using observational data coming from distant supernovae type Ia, the Hubble function $H(z)$ measurements, information coming from the Alcock-Paczy{\\'n}ski test, and baryon acoustic oscillations. Our analysis is based on the modified Friedmann function resulting form dynamical investigations of Brans-Dicke cosmology in the vicinity of a de Sitter state. The qualitative theory of dynamical systems enables us to obtain three different behaviors in the vicinity of this state. We find for a linear approach to the de Sitter state $\\omega_{\\textrm{BD}}=-0.8606^{+0.8281}_{-0.1341}$, for an oscillatory approach to the de Sitter state $\\omega_{\\textrm{BD}}=-1.1103^{+0.1872}_{-0.1729}$, and for the transient de Sitter state represented by a saddle-type critical point $\\omega_{\\textrm{BD}}=-2.3837^{+0.4588}_{-4.5459}$. We obtain the mass of the Brans-Dicke scalar field at the present epoch as $m_{\\phi}\\sim H_{0}$. The Bayesian methods of model comparison are used to discriminate between obtained models. We show that observational data point toward vales of the $\\omega_{\\textrm{BD}}$ parameter close to the value suggested by the low-energy limit of the bosonic string theory.

  10. Dynamics and cosmological constraints on Brans-Dicke cosmology

    NASA Astrophysics Data System (ADS)

    Hrycyna, Orest; Szyd?owski, Marek; Kamionka, Micha?

    2014-12-01

    We investigate observational constraints on the Brans-Dicke cosmological model using observational data coming from distant supernovae type Ia, the Hubble function H (z ) measurements, information coming from the Alcock-Paczy?ski test, and baryon acoustic oscillations. Our analysis is based on the modified Friedmann function resulting form dynamical investigations of Brans-Dicke cosmology in the vicinity of a de Sitter state. The qualitative theory of dynamical systems enables us to obtain three different behaviors in the vicinity of this state. We find for a linear approach to the de Sitter state ?BD=-0.8606-0.1341+0.8281 , for an oscillatory approach to the de Sitter state ?BD=-1.1103-0.1729+0.1872 , and for the transient de Sitter state represented by a saddle-type critical point ?BD=-2.3837-4.5459+0.4588 . We obtain the mass of the Brans-Dicke scalar field at the present epoch as m?˜H0. The Bayesian methods of model comparison are used to discriminate between obtained models. We show that observational data point toward vales of the ?BD parameter close to the value suggested by the low-energy limit of the bosonic string theory.

  11. On Stationary Axially Symmetric Solutions in Brans-Dicke Theory

    E-print Network

    P?nar Kirezli; Özgür Delice

    2015-07-03

    Stationary axially symmetric Brans-Dicke-Maxwell solutions are re-examined in the framework of the Brans-Dicke theory. We see that, employing a particular parametrization of the standard axially symmetric metric simplifies the procedure of obtaining the Ernst equations for axially symmetric electro-vacuum space-times for this theory. This analysis also permit us to construct a two parameter extension in both Jordan and Einstein frames of an old solution generating technique frequently used to construct axially symmetric solutions for Brans-Dicke theory from a seed solution of General Relativity. As applications of this technique, several known and new solutions are constructed including a general axially symmetric BD-Maxwell solution of Plebanski-Demianski with vanishing cosmological constant, i.e. the Kinnersley solution and general magnetized Kerr-Newman type solutions. Some physical properties and circular motion of test particles for a particular subclass of Kinnersley solution, i.e. Kerr-Newman-NUT type solution for BD theory is also investigated in some detail.

  12. Centre de Recherche en Automatique de Nancy Universit Henri Poincar, Nancy -I

    E-print Network

    Paris-Sud XI, Université de

    Centre de Recherche en Automatique de Nancy Université Henri Poincaré, Nancy - I Faculté des Docteur de l'Université Henri Poincaré, Nancy - I en Automatique, Traitement du Signal et Génie Henri Poincaré, CRAN/SYMPA M. Vincent BOMBARDIER (MdC) Université Henri Poincaré, CRAN

  13. An Integrated View Into Multivariate Associations Inferred From TCGA Cancer Data - Dick Kreisberg, TCGA Scientific Symposium 2011

    Cancer.gov

    Home News and Events Multimedia Library Videos An Integrated View Into Multivariate Associations Inferred From TCGA Cancer Data - Dick Kreisberg An Integrated View Into Multivariate Associations Inferred From TCGA Cancer Data - Dick Kreisberg, TCGA

  14. Effects of Alzheimer's Disease on Basic Drawing Processes CharlesE. WRIGHT, SusieHSEH, MalcolmB. DICK

    E-print Network

    California at Irvine, University of

    B. DICK cewright@uci.edu, susie@uci.edu, mcdick@uci.edu Universityof California,Iwine, California,92697 tracing (e.g., Dick, et al., 1996; Eslinger & Damasio, 1986;Knopman, 1991). Within this context it is both

  15. Obituary: Richard L. (Dick) Walker, Jr., 1938-2005

    NASA Astrophysics Data System (ADS)

    Pier, Jeffrey R.; Mason, Brian

    2005-12-01

    Dick Walker, 67, died 30 March 2005 in Flagstaff, AZ, following a long illness. He was born on 9 March 1938 in Hampton, Iowa and grew up in Waterloo, Iowa. As a child, Dick was fascinated with astronomy and built his own telescope. He saved his pennies and bought and read every book on the subject he could find. He also raised pigeons, naming four of them Hertzsprung, Hoyle, Gamow, and Kron. In 1957, the year Sputnik was launched, Dick began his college studies at the University of Northern Iowa in Cedar Falls. In 1959, he transferred to the State University of Iowa (subsequently renamed the University of Iowa) in Iowa City, where he earned a BA degree in astronomy and physics in 1963. He joined the staff of the U.S. Naval Observatory in Washington, DC, where he worked in the Time Service Division for a year before his assignment to the Astrometry and Astrophysics Division. Dick relocated to Flagstaff, AZ, in 1966 to continue his Naval Observatory service at the Flagstaff Station. His retirement in May 1999, ended a thirty-six-year career with USNO. Dick was first and foremost an observational astronomer. From the mid 1960s through the late 1970s, much of Dick's time was devoted to the measurement of binary stars, observing with the 12-inch and 26-inch refractors in Washington and later the 40-inch and 61-inch reflectors in Flagstaff. He also made many trips to Lick Observatory to work with the 36-inch Clark Refractor there. During this time he consulted with Charles Worley, who was observing on the 26-inch, to make sure time was well-spent examining doubles that could not be observed in Washington. This period of observing overlapped with the early years of speckle interferometry, and Dick's observations, made with the largest telescope used for micrometry at the time, were very important for ascertaining the veracity of this new technique. He was a studious and very careful observer of doubles and made over 8,000 measures, resulting in almost 3,000 mean positions. While measuring known systems for orbital analysis, he discovered 22 pairs (mostly additional components to these systems) and moving pairs, and his highlighting the rapid motion of these systems resulted in them being placed on many programs and led to the more definitive orbits of today. As a staff member of the Flagstaff Station, Dick was, for over 30 years, one of the principal observers on the 61-inch parallax program. He also ventured into other areas of astronomy, including planetary systems. He is credited with discovering the moon of Saturn, Epimetheus, in December 1966, with the USNO Flagstaff Station 61-inch Kaj Strand Astrometric Reflector. He also obtained photographic plates to determine accurate positions of the outer planets for the Voyager 2 approaches to Uranus in 1986 and Neptune in 1989. It is interesting to note that Dick's career in observational astronomy spanned three different eras of astronomical instrumentation and technique. He began his career doing eyeball astronomy, using a filar micrometer to measure double star separations. Photographic astronomy then became dominant and he took many thousands of plates. During the last ten years of his career, electronic cameras, primarily CCDs, replaced photographic plates. He readily adapted to the changing technologies. A man of many interests, Dick was fascinated by the history of astronomy, especially archeoastronomy, as well as Egyptology. He taught himself the language of hieroglyphics. In 1977, having accumulated several weeks of vacation time, he set off on a trek to walk the Nile for 500 miles from Aswan to Cairo. One night, in the town Asyut along the Nile, he was brought into the police station. The local inhabitants found it hard to credit his story that he was simply on a walk and questioned him as a possible Israeli spy. Following his retirement from the Naval Observatory, Dick consulted in a couple of construction projects. He designed the analemma and the skywalk star fields for the Koch Center for Science, Math, and Technology at Deerfield Academy in Massachusetts. He also c

  16. PHYSICAL REVIEW A 85, 043803 (2012) Collapse-revival dynamics and atom-field entanglement in the nonresonant Dicke model

    E-print Network

    Fehske, Holger

    2012-01-01

    in the nonresonant Dicke model A. Alvermann* Theory of Condensed Matter, Cavendish Laboratory, Cambridge CB3 0HE 2012) We consider the dynamics of atomic and field coherent states in the nonresonant Dicke model dynamics of atomic ensembles in the nonresonant Dicke model [11]. We identify the relevant CR mechanism

  17. A D-dimensional Heckmann-like solution of Jordan-Brans-Dicke theory

    E-print Network

    S. M. Kozyrev

    2007-12-18

    In this short letter we present a some rigorous vacuum solutions of the D-dimensional Jordan-Brans-Dicke field equations. In contrast with the well known Brans-Dicke solutions, to the search of static and spherically symmetric space-time we choose the widespread Hilbert coordinates.

  18. Role of the Brans-Dicke scalar in the holographic description of dark energy

    E-print Network

    Hungsoo Kim; H. W. Lee; Y. S. Myung

    2005-09-21

    We study cosmological application of the holographic energy density in the Brans-Dicke theory. Considering the holographic energy density as a dynamical cosmological constant, it is more natural to study it in the Brans-Dicke theory than in general relativity. Solving the Friedmann and Brans-Dicke field equations numerically, we clarify the role of Brans-Dicke field during evolution of the universe. When the Hubble horizon is taken as the IR cutoff, the equation of state ($w_{\\Lmd}$) for the holographic energy density is determined to be 5/3 when the Brans-Dicke parameter $\\omg$ goes infinity. This means that the Brans-Dicke field plays a crucial role in determining the equation of state. For the particle horizon IR cutoff, the Brans-Dicke scalar mediates a transition from $w_{\\Lmd} = -1/3$ (past) to $w_{\\Lmd} = 1/3$ (future). If a dust matter is present, it determines future equation of state. In the case of future event horizon cutoff, the role of the Brans-Dicke scalar and dust matter are turned out to be trivial, whereas the holographic energy density plays an important role as a dark energy candidate with $w_{\\Lmd} =-1$.

  19. What happened if Dirac, Sciama and Dicke had talked to each other about cosmology?

    Microsoft Academic Search

    A. Unzicker; Pestalozzi-Gymnasium München

    2008-01-01

    The inspiring contributions to cosmology originating from the above named researchers seem abandoned today. Surprisingly, their basic ideas can be realized by slight modifications of each proposal. We study Dirac's article on the large number hypothesis (1938), Sciama's proposal of realizing Mach's principle (1953), and Dicke's scalar theory of gravitation with a variable speed of light (1957). Dicke's tentative theory

  20. ORIGINAL PAPER Tribute to Dick Post on His 90th Birthday

    E-print Network

    that I learned about Dick's interest in electric cars. He and his son Steve published this in Sci-invented the Yin Yang in the first place. Dick also invented Direct Conversion, to make electricity by fusion at very high speed, and a specially-designed electric motor that could deliver 100 horsepower in a device

  1. Henry Norris Russell and the Expanding Universe

    NASA Astrophysics Data System (ADS)

    DeVorkin, D.

    2013-04-01

    Henry Norris Russell, one of the most influential American astronomers of the first half of the 20th Century, had a special place in his heart for the Lowell Observatory. Although privately critical of the founder for his pronouncements about life on Mars and the superiority of the Mars Hill observing site, he always supported the Observatory in public and professional circles. He staunchly supported Tombaugh's detection of a planet as leading from Lowell's prediction, and always promoted V. M. Slipher's spectroscopic investigations of planetary and stellar phenomena. But how did he react to Slipher's puzzling detection of the extreme radial velocities of spiral nebulae starting in 1912, and how did he regard the extension and interpretation of those observations by Hubble and others in following decades? Here we describe the arc of Russell's reactions, dating from Slipher's first detection, as an indicator of how mainstream stellar astronomers reacted to the concept of an expanding universe.

  2. 2. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Photographed by Henry F. Withey March 1936 VIEW OF FOUNTAIN IN MISSION PARK, MISSION PROPERTY AT ONE TIME. - Mission San Fernando Rey de Espana, Fountains, Mission Boulevard, San Fernando, Los Angeles County, CA

  3. Direct Liquid Cooling for Electronic Henry Coles and Steve Greenberg

    E-print Network

    LBNL-6641E Direct Liquid Cooling for Electronic Equipment Henry Coles and Steve Greenberg Stöneberg. Thanks to Server Technology, Inc. who provided power measurement and distribution for this project. #12;ii ABSTRACT This report documents a demonstration of an electronic

  4. 4. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 STAIRCASE TO TERRACE. S. W. FRONT. - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  5. 11. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 WINDOW DETAIL. (SOUTHWEST FRONT) - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  6. 3. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    3. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 N. W. ELEVATION FROM NORTH. - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  7. 2. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    2. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 N. W. ELEVATION FROM WEST. - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  8. 13. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 DETAIL OF PATIO (LOOKING EAST) - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  9. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 GENERAL VIEW (FROM SOUTH) - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  10. 5. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 CORRIDOR DETAIL, S. W. FRONT. - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  11. 12. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 S. W. CORRIDOR OF PATIO. - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  12. 14. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    14. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 DETAIL OF PATIO (LOOKING SOUTH) - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  13. 10. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey Photographed by Henry F. Withey May 1936 WINDOW DETAIL (N. W. FRONT) - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA

  14. 1. Historic American Buildings Survey Photographed by Henry F. Withey ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    1. Historic American Buildings Survey Photographed by Henry F. Withey March 1936 VIEW OF SOUTH AND WEST SIDE FROM STREET. - Casa Adobe de San Rafael, 1340 Dorothy Drive, Glendale, Los Angeles County, CA

  15. 23. Henry Whitehead place in Cades Cove looking ESE. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Henry Whitehead place in Cades Cove looking ESE. - Great Smoky Mountains National Park Roads & Bridges, Cades Cove Road & Laurel Creek Road, From Townsend Wye to Cades Cove, Gatlinburg, Sevier County, TN

  16. 19. Historic American Buildings Survey Photographed by Henry F. Withey, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. Historic American Buildings Survey Photographed by Henry F. Withey, November, 1936 OLD ARCADE WEST SIDE OF PROPERTY - Mission San Luis Rey de Francia, Mission Road, Oceanside, San Diego County, CA

  17. Brans-Dicke wormholes in the Jordan and Einstein frames

    E-print Network

    K. K. Nandi; B. Bhattacharjee; S. M. K. Alam; J. Evans

    2009-05-31

    We examine the possibility of static wormhole solutions in the vacuum Brans-Dicke theory both in the original (Jordan) frame and in the conformally rescaled (Einstein) frame. It turns out that, in the former frame, wormholes exist only in a very narrow interval of the coupling parameter, viz., -3/2

  18. An Algorithm for Generating Rotating Brans-Dicke Wormhole Solutions

    E-print Network

    Kamal K. Nandi; Yuan-Zhong Zhang

    2006-06-02

    Using the ansatz of Matos and N\\'{u}\\~{n}ez, the present article proposes an algorithm for generating several classes, not all independent, of asymptotically flat rotating wormhole solutions in the Brans-Dicke Theory. The algorithm allows us to associate a real number}$n$ \\textit{with} \\textit{each static and generated rotating solution. We shall also demonstrate how to match a rotating wormhole to a flat spacetime at the matter boundaries. The vacuum string extensions of the solutions are straightforward. The physical interpretations of the solutions are deferred.

  19. Dick Dalitz:. Examples of His Contributions to Particle Physics

    NASA Astrophysics Data System (ADS)

    Goldstein, Gary R.

    2008-07-01

    Dick Dalitz produced lasting contributions to particle physics for 50 years. Along with Dalitz pairs, Dalitz plots and CDD poles, he did major work in parity violation, hyperon resonance identification, the quark model, and hypernuclei. These topics will be summarized, with some emphasis on the author's collaboration with Dalitz on quark spin and fragmentation correlations, and, particularly, the work on the identification of the top quark and its mass. Short biographical information is interspersed. This paper is based on a presentation at the International School of Subnuclear Physics, Erice 2006.

  20. Dick Dalitz: Examples of His Contributions to Particle Physics

    E-print Network

    Gary R. Goldstein

    2007-04-30

    Dick Dalitz produced lasting contributions to particle physics for 50 years. Along with Dalitz pairs, Dalitz plots and CDD poles, he did major work in parity violation, hyperon resonance identification, the quark model, and hypernuclei. These topics will be summarized, with some emphasis on the author's collaboration with Dalitz on quark spin and fragmentation correlations, and, particularly, the work on the identification of the top quark and its mass. Short biographical information is interspersed. This paper is based on a presentation at the International School of Subnuclear Physics, Erice 2006.

  1. Equilibration and macroscopic quantum fluctuations in the Dicke model

    E-print Network

    Alexander Altland; Fritz Haake

    2012-01-31

    We discuss the unitary quantum dynamics of the Dicke model (spin and oscillator coupled). A suitable quasiprobabilty representing the quantum state turns out to obey a Fokker-Planck equation, with drift terms representing the underlying classical Hamiltonian flow and diffusion terms describing quantum fluctuations. We show (by projecting the dynamics onto a co-moving Poincar\\'e section) how the interplay of deterministic drift and quantum diffusion generates equilibration to the microcanonical density, under conditions of global classical chaos. The pertinent photon statistics reveals macroscopic quantum fluctuations.

  2. Observational constraints imposed by Brans-Dicke cosmologies.

    NASA Technical Reports Server (NTRS)

    Morganstern, R. E.

    1973-01-01

    Flat-space Brans-Dicke (BD) cosmologies previously found are analyzed in more detail. It is shown that the observed values of the matter density, the Hubble age, the ages of objects in the universe, the deceleration parameter, and the bound on the (unobserved) fractional time variation of the gravitational constant are too inaccurate to distinguish between the BD and Einstein-Friedmann cosmologies. An attempt is made to argue that because of the great degree of latitude in the observational constraints imposed by the BD cosmologies, efforts to improve the bound on the fractional time variation of G alone are not sufficient to rule out the BD theory.

  3. Cosmology in Brans-Dicke theory with a scalar potential

    E-print Network

    Caroline Santos; Ruth Gregory

    1996-11-27

    We consider the general behaviour of cosmologies in Brans-Dicke theory where the dilaton is self-interacting via a potential $V(\\Phi)$. We show that the general radiation universe is a two-dimensional dynamical system whereas the dust or false vacuum universe is three-dimensional. This is in contrast to the non-interacting dilaton which has uniformly a two-dimensional phase space. We find the phase spaces in each case and the general behaviour of the cosmologies.

  4. Bandit-Based Genetic Programming J.-B. Hoock and O. Teytaud

    E-print Network

    Bandit-Based Genetic Programming J.-B. Hoock and O. Teytaud TAO (Inria), LRI, UMR 8623(CNRS - Univ the validation of randomly generated patterns in a Monte-Carlo Tree Search program. Our bandit-based genetic pro Introduction Genetic Programming (GP) is the automatic building of programs for solving a given task

  5. Draft genome sequences of Streptococcus bovis strains ATCC 33317 and JB1

    Technology Transfer Automated Retrieval System (TEKTRAN)

    We report the draft genome sequences of Streptococcus bovis type strain ATTC 33317 (CVM42251) isolated from cow dung and strain JB1 (CVM42252) isolated from a cow rumen in 1977. Strains were subjected to Next Generation sequencing and the genome sizes are approximately 2 MB and 2.2 MB, respectively....

  6. TIME-FREQUENCY-MODULATION REPRESENTATION OF STOCHASTIC SIGNALS Philip J.B. Jackson

    E-print Network

    Jackson, Philip JB

    TIME-FREQUENCY-MODULATION REPRESENTATION OF STOCHASTIC SIGNALS Philip J.B. Jackson Centre discrete signals with time- varying parameters, and extended to a 3D time-frequency- modulation modulation (AM) systems, the carrier signal is a sinusoid of much higher frequency than those

  7. Questioning the cultural evolution of altruism J.-B. ANDRE * & O. MORIN

    E-print Network

    André, Jean-Baptiste

    REVIEW Questioning the cultural evolution of altruism J.-B. ANDRE´ *à & O. MORIN *CNRS UMR7206 Eco also West et al., 2011, section 6.1.1). However, evolutionary theory predicts that altruism can evolve that human societies, but not other animal societies, rely upon genuine altruism must be backed by some

  8. A GIS-based Hydraulic Bulking Factor Map for New Mexico Gallegos, J.B.1

    E-print Network

    Cal, Mark P.

    an engineering design factor for drainage structures. Introduction A characteristic of watersheds in southwest under sediment load. Therefore, a preliminary statewide map of bulking factor was generated based 1 A GIS-based Hydraulic Bulking Factor Map for New Mexico Gallegos, J.B.1 ; Richardson, C

  9. Tablet PCs in Engineering Mathematics Courses at the J.B. Speed School of Engineering

    ERIC Educational Resources Information Center

    Hieb, Jeffrey L.; Ralston, Patricia A. S.

    2010-01-01

    In fall 2007, J.B. Speed School of Engineering at the University of Louisville joined the ranks of universities requiring the purchase of Tablet PCs for all new entering students. This article presents a description of how the Department of Engineering Fundamentals incorporated Tablet PCs into their instruction, a review of the literature…

  10. Dicke-type phase transition in a multimode optomechanical system

    E-print Network

    Jesse Mumford; D. H. J. O'Dell; Jonas Larson

    2015-01-27

    We consider the "membrane in the middle" optomechanical model consisting of a laser pumped cavity which is divided in two by a flexible membrane that is partially transmissive to light and subject to radiation pressure. Steady state solutions at the mean-field level reveal that there is a critical strength of the light-membrane coupling above which there is a symmetry breaking bifurcation where the membrane spontaneously acquires a displacement either to the left or the right. This bifurcation bears many of the signatures of a second order phase transition and we compare and contrast it with that found in the Dicke model. In particular, by studying limiting cases and deriving dynamical critical exponents using the fidelity susceptibility method, we argue that the two models share very similar critical behaviour. For example, the obtained critical exponents indicate that they fall within the same universality class. Away from the critical regime we identify, however, some discrepancies between the two models. Our results are discussed in terms of experimentally relevant parameters and we evaluate the prospects for realizing Dicke-type physics in these systems.

  11. Frequency comparison of optical lattice clocks beyond the Dick limit

    NASA Astrophysics Data System (ADS)

    Takamoto, Masao; Takano, Tetsushi; Katori, Hidetoshi

    2011-05-01

    The supreme accuracy of atomic clocks relies on the universality of atomic transition frequencies. The stability of a clock, meanwhile, measures how quickly the clock's statistical uncertainties are reduced. The ultimate measure of stability is provided by the quantum projection noise, which improves as 1/?N by measuring N uncorrelated atoms. Quantum projection noise limited stabilities have been demonstrated in caesium clocks and in single-ion optical clocks, where the quantum noise overwhelms the Dick effect attributed to local oscillator noise. Here, we demonstrate a synchronous frequency comparison of two optical lattice clocks using 87Sr and 88Sr atoms, respectively, for which the Allan standard deviation reached 1 × 10-17 in an averaging time of 1,600 s by cancelling out the Dick effect to approach the quantum projection noise limit. The scheme demonstrates the advantage of using a large number (N ~ 1,000) of atoms in optical clocks and paves the way to investigating the inherent uncertainties of clocks and relativistic geodesy on a timescale of tens of minutes.

  12. The Dicke model as the contraction limit of a pseudo-deformed Richardson-Gaudin model

    E-print Network

    Pieter W. Claeys; Stijn De Baerdemacker; Mario Van Raemdonck; Dimitri Van Neck

    2014-11-19

    The Dicke model is derived in the contraction limit of a pseudo-deformation of the quasispin algebra in the su(2)-based Richardson-Gaudin models. Likewise, the integrability of the Dicke model is established by constructing the full set of conserved charges, the form of the Bethe Ansatz state, and the associated Richardson-Gaudin equations. Thanks to the formulation in terms of the pseudo-deformation, the connection from the su(2)-based Richardson-Gaudin model towards the Dicke model can be performed adiabatically.

  13. Dicke-Hepp-Lieb Superradiant Phase Transition and Independent Modes Model in Quantum Optomechanics

    E-print Network

    Aranya B Bhattacherjee

    2013-03-10

    We show that in the strong coupling linear regime, the dispersive opto-mechanical Hamiltonian system can undergo a Dicke-Hepp-Lieb superradiant phase transition with two critical points. The higher critical point is the usual second order Dicke superradiant phase transition while the lower critical point is a new effect showing similarity to the usual Dicke superradiance. We also show that the mechanical mode near its quantum ground state completely decouples from the optical mode and the optical mode shows similarity to the Bogoluibov like excitations.

  14. Modified Brans-Dicke theory of gravity from five-dimensional vacuum

    E-print Network

    Jose Edgar Madriz Aguilar; Carlos Romero; Adriano Barros

    2007-05-03

    We investigate, in the context of five-dimensional (5D) Brans-Dicke theory of gravity, the idea that macroscopic matter configurations can be generated from pure vacuum in five dimensions, an approach first proposed in the framework of general relativity. We show that the 5D Brans-Dicke vacuum equations when reduced to four dimensions lead to a modified version of Brans-Dicke theory in four dimensions (4D). As an application of the formalism, we obtain two five-dimensional extensions of four-dimensional O'Hanlon and Tupper vacuum solution and show that they lead two different cosmological scenarios in 4D.

  15. Generation of Dicke States with Phonon-Mediated Multi-level Stimulated Raman Adiabatic Passage

    E-print Network

    Atsushi Noguchi; Kenji Toyoda; Shinji Urabe

    2012-09-05

    We generate half-excited symmetric Dicke states of two and four ions. We use multi-level stimulated Raman adiabatic passage (STIRAP) whose intermediate states are phonon Fock states. This process corresponds to the spin squeezing operation and half-excited Dicke states are generated during multi-level STIRAP. This method does not require local access for each ion or the preparation of phonon Fock states. Furthermore, it is robust since it is an adiabatic process. We evaluate the Dicke state using a witness operator and determine the upper and lower bounds of the fidelity without using full quantum tomography.

  16. Cosmological implications of a supersymmetric extension of the Brans-Dicke theory

    E-print Network

    Riccardo Catena

    2007-09-11

    In the Brans-Dicke theory the Planck mass is replaced by a dynamical scalar field. We consider here the supersymmetric analogous of this mechanism replacing in the supergravity Lagrangian the Planck mass with a chiral superfield. This analysis is motivated by the research of possible connections between supersymmetric Dark Matter scenarios and Dark Energy models based on Brans-Dicke-like theories. We find that, contrary to the original Brans-Dicke theory, in its supersymmetric analogous the gravitational sector does not couple to the matter sector in a universal metric way. As a result, violations of the weak equivalence principle could be present in such a scenario.

  17. Experimental Quantum Networking Protocols via Four-Qubit Hyperentangled Dicke States

    E-print Network

    A. Chiuri; C. Greganti; M. Paternostro; G. Vallone; P. Mataloni

    2012-09-23

    We report the experimental demonstration of two quantum networking protocols, namely quantum 1->3 telecloning and open-destination teleportation, implemented using a four-qubit register whose state is encoded in a high-quality two-photon hyperentangled Dicke state. The state resource is characterized using criteria based on multipartite entanglement witnesses. We explore the characteristic entanglement-sharing structure of a Dicke state by implementing high-fidelity projections of the four-qubit resource onto lower-dimensional states. Our work demonstrates for the first time the usefulness of Dicke states for quantum information processing.

  18. Generalized Sparling-Thirring form in the Brans-Dicke theory

    E-print Network

    Ahmet Baykal; Özgür Delice

    2014-10-15

    The definition of the Sparling-Thirring form is extended to the Brans-Dicke theory. By writing the Brans-Dicke field equations in a formally Maxwell-like form, a superpotential and a corresponding pseudo energy-momentum form are defined. The general energy expression provided by the superpotential in the Jordan frame is discussed in relation to the corresponding expression in the Einstein frame. In order to substantiate its formal definition, the generalized Sparling-Thirring form is used to calculate the energy for the spherically symmetric vacuum solution in the Brans-Dicke theory.

  19. Applicability of Henry's Law to helium solubility in olivine

    NASA Astrophysics Data System (ADS)

    Jackson, C.; Parman, S. W.; Kelley, S. P.; Cooper, R. F.

    2013-12-01

    Applicability of Henry's Law to helium solubility in olivine We have experimentally determined helium solubility in San Carlos olivine across a range of helium partial pressures (PHe) with the goal of quantifying how noble gases behave during partial melting of peridotite. Helium solubility in olivine correlates linearly with PHe between 55 and 1680 bar. This linear relationship suggests Henry's Law is applicable to helium dissolution into olivine up to 1680 bar PHe, providing a basis for extrapolation of solubility relationships determined at high PHe to natural systems. This is the first demonstration of Henry's Law for helium dissolution into olivine. Averaging all the data of the PHe series yields a Henry's coefficient of 3.8(×3.1)×10-12 mol g-1 bar-1. However, the population of Henry's coefficients shows a positive skew (skewness = 1.17), i.e. the data are skewed to higher values. This skew is reflected in the large standard deviation of the population of Henry's coefficients. Averaging the median values from each experiment yields a lower Henry's coefficient and standard deviation: 3.2(× 2.3)×10-12 mol g-1 bar-1. Combining the presently determined helium Henry's coefficient for olivine with previous determinations of helium Henry's coefficients for basaltic melts (e.g. 1) yields a partition coefficient of ~10-4. This value is similar to previous determinations obtained at higher PHe (2). The applicability of Henry's Law here suggests helium is incorporated onto relatively abundant sites within olivine that are not saturated by 1680 bar PHe or ~5×10-9 mol g-1. Large radius vacancies, i.e. oxygen vacancies, are energetically favorable sites for noble gas dissolution (3). However, oxygen vacancies are not abundant enough in San Carlos olivine to account for this solubility (e.g. 4), suggesting the 3x10-12 mol g-1 bar-1 Henry's coefficient is associated with interstitial dissolution of helium. Helium was dissolved into olivine using an externally heated pressure vessel (Brown University). The starting materials were prepared by cutting gem-quality San Carlos olivine (~Fo90) into small blocks (~4×2×1 mm) using a diamond wafering blade saw and polishing with alumina slurries and colloidal silica. Analysis was completed by laser ablation-mass spectrometry using a 193 nm excimer laser and a MAP 215-50 specifically tuned for He (Open University, UK). Laser ablation pit depth varied from 2 to 40 ?m, and no correlation between pit depth and [He] is observed after accounting for variations PHe across the different experiments. This lack of correlation indicates a close approach to equilibrium was achieved over the experimental durations. Two analyses yielded spuriously high [He] (>3 std. dev. from the population mean, n = 85), and these analyses were not used to calculate Henry's coefficients. The two spuriously high analyses, in combination with the right skew of Henry's coefficients calculated from individual data points, suggests gem-quality San Carlos olivine contains volumes with anomalously high helium solubility. The nature of these volumes is currently under investigation. However, despite their presence, helium is still highly incompatible in olivine during partial melting. [1] Lux GCA 1987 [2] Heber et al. GCA 2007 [3] Shcheka & Keppler Nature 2012 [4] Walker et al. PEPI 2009

  20. Henry's law constants of chlorinated solvents at elevated temperatures.

    PubMed

    Chen, Fei; Freedman, David L; Falta, Ronald W; Murdoch, Lawrence C

    2012-01-01

    Henry's law constants for 12 chlorinated volatile organic compounds (CVOCs) were measured as a function of temperature ranging from 8 to 93°C, using the modified equilibrium partitioning in closed system (EPICS) method. The chlorinated compounds include tetrachloroethylene, trichloroethylene, cis-1,2-dichloroethylene, vinyl chloride, 1,1,1-trichloroethane, 1,1-dichloroethane, 1,2-dichloroethane, chloroethane, carbon tetrachloride, chloroform, dichloromethane, and chloromethane. The variation in Henry's constants for these compounds as a function of temperature ranged from around 3-fold (chloroethane) to 30-fold (1,2-dichloroethane). Aqueous solubilities of the pure compounds were measured over the temperature range of 8-75°C. The temperature dependence of Henry's constant was predicted using the ratio of pure vapor pressure to aqueous solubility, both of which are functions of temperature. The calculated Henry's constants are in a reasonable agreement with the measured results. With the improved data on Henry's law constants at high temperatures measured in this study, it will be possible to more accurately model subsurface remediation processes that operate near the boiling point of water. PMID:22071373

  1. MATHEMATICS: ALGORITHMS AND PROOFS THIERRY COQUAND, HENRI LOMBARDI, MARIE-FRANCOISE ROY,

    E-print Network

    Spitters, Bas

    MATHEMATICS: ALGORITHMS AND PROOFS THIERRY COQUAND, HENRI LOMBARDI, MARIE-FRANCOISE ROY, AND BAS¨oteborg, Sweden) Henri Lombardi (Franche-Comte, France) Marie-Francoise Roy (Rennes, France) Bas Spitters

  2. 4. PHOTOGRAPHIC PORTRAIT OF HENRY OSSAWA TANNER Photocopy of pre1930 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. PHOTOGRAPHIC PORTRAIT OF HENRY OSSAWA TANNER Photocopy of pre-1930 photograph, courtesy of Archives of American Art, Smithsonian Institution, Washington, D. C. - Henry O. Tanner House, 2908 West Diamond Street, Philadelphia, Philadelphia County, PA

  3. Gravitating monopole and its black hole solution in Brans-Dicke Theory

    E-print Network

    Tamaki, T; Maeda, K I; Tamaki, Takashi; Torii, Takashi; Maeda, Kei-ichi

    1999-01-01

    We find a self-gravitating monopole and its black hole solution in Brans-Dicke theory. We mainly discuss the properties of these solutions in the Einstein frame and compare the solutions with those in general relativity.

  4. Molecular chaperones and the stress of oncogenesis Dick D Mosser*,1

    E-print Network

    Morimoto, Richard

    Molecular chaperones and the stress of oncogenesis Dick D Mosser*,1 and Richard I Morimoto2 1. An underlying basis of oncogenesis is the acquisition and accumulation of mutations that provide the transformed

  5. Cosmic string configuration in a five dimensional Brans-Dicke theory

    E-print Network

    V. B. Bezerra; C. N. Ferreira; G. de A. Marques

    2009-04-12

    We consider a scalar field interaction with a cosmic string configuration in a flat 3-brane. The origin of this field is given by a compactification mechanism in the context of a 5-dimensional Brans-Dicke theory. We use the Cosmic Microwave Background Radiation constraint to analyse a possibility of optical activity effect in connection with the Brans-Dicke parameter w and obtain relations between the compactification modes. We show that the dilatons produced by a cosmic string can decay into gauge bosons with masses given by the compactification modes. The Brans- Dicke parameter w imposes stringent constraints on the mass of the dilaton which lives in the brane and help us to understand the energy scales. In this scenario we estimate the lifetime of the dilaton which decays into light gauge bosons and the dependence of this phenomenon with the Brans-Dicke parameter.

  6. Making Dick and Jane: Historical Genesis of the Modern Basal Reader.

    ERIC Educational Resources Information Center

    Luke, Allan

    1987-01-01

    This article traces the development of the Dick and Jane texts, examining the dominent intellectual and economic considerations of their authors and publishers in order to demystify their transmission of values, beliefs, and meanings. (MT)

  7. Motional frequency shifts of trapped ions in the Lamb-Dicke regime

    E-print Network

    I. Lizuain; J. G. Muga; J. Eschner

    2007-07-09

    First order Doppler effects are usually ignored in laser driven trapped ions when the recoil frequency is much smaller than the trapping frequency (Lamb-Dicke regime). This means that the central, carrier excitation band is supposed to be unaffected by vibronic transitions in which the vibrational number changes. While this is strictly true in the Lamb-Dicke limit (infinitely tight confinement), the vibronic transitions do play a role in the Lamb-Dicke regime. In this paper we quantify the asymptotic behaviour of their effect with respect to the Lamb-Dicke parameter. In particular, we give analytical expressions for the frequency shift, ``pulling'' or ``pushing'', produced in the carrier absorption band by the vibronic transitions both for Rabi and Ramsey schemes. This shift is shown to be independent of the initial vibrational state.

  8. ERRATUM TO "THE LOOP SPACE OF THE Q-CONSTRUCTION" Henri Gillet and Daniel R. Grayson

    E-print Network

    ERRATUM TO "THE LOOP SPACE OF THE Q-CONSTRUCTION" Henri Gillet and Daniel R. Grayson University.6 of the paper. 1991 Mathematics Subject Classification. Primary 19. Supported by the NSF. 1 #12;2 HENRI GILLET AND DANIEL R. GRAYSON References 1. Henri Gillet and Daniel R. Grayson, The loop space of the Q

  9. Entropy by design: Gilles Clment, Parc Henri Matisse and the Limits

    E-print Network

    Jones, Peter JS

    Entropy by design: Gilles Clément, Parc Henri Matisse and the Limits to Avant-garde Urbanism in the middle of Lille's Parc Henri Matisse, is an intriguing example of recent landscape design. The park paysage. Comparaison et analyse de deux exemples: le Parc de Lancy et le Parc Henri-Matisse', Projets de

  10. Alina Hang, Fabian Hennecke, Sebastian Lhmann, Max Maurer, Henri Palleis, Sonja Rmelin,

    E-print Network

    Alina Hang, Fabian Hennecke, Sebastian Löhmann, Max Maurer, Henri Palleis, Sonja Rümelin, Emanuel v Science Media Informatics Group #12;Alina Hang, Fabian Hennecke, Sebastian L¨ohmann, Max Maurer, Henri The Editors Alina Hang, Fabian Hennecke, Sebastian L¨ohmann, Max Maurer, Henri Palleis, Sonja R

  11. The emergence of French probabilistic statistics Borel and the Institut Henri Poincare around the 1920s

    E-print Network

    Mazliak, Laurent

    The emergence of French probabilistic statistics Borel and the Institut Henri Poincar´e around Institute of Paris University, (ISUP) in 1922 and above all the Henri Poincar´e Institute (IHP) in 1928. At the IHP, a new journal Annales de l'Institut Henri Poincar´e was created in 1931. We discuss the first

  12. A perturbation solution to the transient Henry problem for seawater D.M. Tartakovskya

    E-print Network

    Tartakovsky, Daniel M.

    1573 A perturbation solution to the transient Henry problem for seawater intrusion D`ecnica de Catalunya (UPC), Jordi Girona 1-3, Edificio D2, 08034 Barcelona, Espa~na Henry's formulation with variable density. While the Henry problem often serves as a benchmark for numerical codes, the accuracy

  13. L'ORGANO-DYNAMISME DE HENRI EY : UNE LECTURE PISTMOLOGIQUE par Djamel Melliti

    E-print Network

    Paris-Sud XI, Université de

    L'ORGANO-DYNAMISME DE HENRI EY : UNE LECTURE ÉPISTÉMOLOGIQUE par Djamel Melliti Psychologue de la manière dont Henri Ey articule ces deux perspectives pour comprendre les phénomènes psychopathologiques sous un angle épistémologique original. Mots-clés : épistémologie ­ Henri Ey ­ neurologie

  14. ERRATUM TO ``THE LOOP SPACE OF THE QCONSTRUCTION'' Henri Gillet and Daniel R. Grayson

    E-print Network

    ERRATUM TO ``THE LOOP SPACE OF THE Q­CONSTRUCTION'' Henri Gillet and Daniel R. Grayson University.6 of the paper. 1991 Mathematics Subject Classification. Primary 19. Supported by the NSF. 1 #12; 2 HENRI GILLET AND DANIEL R. GRAYSON References 1. Henri Gillet and Daniel R. Grayson, The loop space of the Q

  15. Henri Palleis, Alina Hang, Doris Hausen, Fabian Hennecke, Felix Lauber, Sonja Rmelin,

    E-print Network

    Henri Palleis, Alina Hang, Doris Hausen, Fabian Hennecke, Felix Lauber, Sonja Rümelin, Simon Stusak-5207 University of Munich Department of Computer Science Media Informatics Group #12;Henri Palleis, Alina Hang of Computer Science Media Informatics Group #12;#12;Henri Palleis, Alina Hang, Doris Hausen, Fabian Hennecke

  16. www.imstat.org/aihp Annales de l'Institut Henri Poincar -Probabilits et Statistiques

    E-print Network

    www.imstat.org/aihp Annales de l'Institut Henri Poincaré - Probabilités et Statistiques 2012, Vol. 48, No. 3, 661­687 DOI: 10.1214/11-AIHP448 © Association des Publications de l'Institut Henri are strongly guided by the reasoning in Kyprianou (Ann. Inst. Henri Poincaré Probab. Stat. 40 (2004) 53

  17. Fluid Phase Equilibria 226 (2004) 161172 Analysis of Henry's constant for carbon dioxide in water

    E-print Network

    Lisal, Martin

    2004-01-01

    Fluid Phase Equilibria 226 (2004) 161­172 Analysis of Henry's constant for carbon dioxide in water of the Henry constant for carbon dioxide in water by Monte Carlo simulations over a broad range of temperatures) potentials, by the four-site TIP4P potential and by the five-site TIP5P potential. Henry's constant

  18. Cartographie de la chronique d'Henri de Livonie Nicolas Bourgeois

    E-print Network

    Paris-Sud XI, Université de

    Cartographie de la chronique d'Henri de Livonie Nicolas Bourgeois ESSEC, Projet ANR 09-EMER-010 TODO, nbourgeo@phare.normalesup.org Résumé. La chronique d'Henri de Livonie est la principale et la fin de la seconde guerre mondiale 1 . La chronique du prêtre Henri Sur l'histoire de cette période

  19. Model-based Estimation of Probabilistic Hybrid Automata MELVIN MICHAEL HENRY

    E-print Network

    Williams, Brian C.

    1 Model-based Estimation of Probabilistic Hybrid Automata by MELVIN MICHAEL HENRY B.S. Systems OF TECHNOLOGY May 2002 Copyright © Melvin M. Henry, 2002. All Rights Reserved. The author hereby grants to MIT MODEL-BASED ESTIMATION OF PROBABILISTIC HYBRID AUTOMATA #12;2 by MELVIN MICHAEL HENRY Submitted

  20. Henry Giroux on Democracy Unsettled: From Critical Pedagogy to the War on Youth--An Interview

    ERIC Educational Resources Information Center

    Peters, Michael A.

    2012-01-01

    This interview conducted with Henry Giroux begins by probing Henry's childhood, upbringing and undergraduate years to discover where his sense of social justice took hold. It also questions Henry about his working-class background and the major influences on his thought, including his relationships with Paulo Freire and Howard Zinn. The interview…

  1. Role of Brans-Dicke Theory with or without self-interacting potential in cosmic acceleration

    E-print Network

    Writambhara Chakraborty; Ujjal Debnath

    2008-07-11

    In this work we have studied the possibility of obtaining cosmic acceleration in Brans-Dicke theory with varying or constant $\\omega$ (Brans- Dicke parameter) and with or without self-interacting potential, the background fluid being barotropic fluid or Generalized Chaplygin Gas. Here we take the power law form of the scale factor and the scalar field. We show that accelerated expansion can also be achieved for high values of $\\omega$ for closed Universe.

  2. On the weak field approximation of Brans-Dicke theory of gravity

    E-print Network

    A. Barros; C. Romero

    1997-12-18

    It is shown that in the weak field approximation solutions of Brans-Dicke equations are simply related to the solutions of General Relativity equations for the same matter distribution. A simple method is developed which permits to obtain Brans-Dicke solutions from Einstein solutions when both theories are considered in their linearized forms. To illustrate the method some examples found in the literature are discussed.

  3. Exponentially Expanding Radiation Dominated and Dust Dominated Universes in Brans-Dicke Theory

    E-print Network

    Metin Arik; Tunc Erkmen

    2007-06-21

    The Brans-Dicke Theory of Gravity is one of the most promising alternatives to the Einstein's Theory of General Relativity. We have examined an action term with wrong signs for both the kinetic and mass terms for the scalar field and have found solutions for both the scale factor of the universe and the Brans-Dicke scalar field which vary exponentially in time.

  4. Dynamics of Brans-Dicke cosmology with varying mass fermions

    SciTech Connect

    Liu Daojun [Center for Astrophysics, Shanghai Normal University, 100 Guilin Road, Shanghai 200234 (China)

    2010-09-15

    In this paper, the cosmological dynamics of Brans-Dicke (BD) theory in which there are fermions with a coupling to BD scalar field as well as a self-interaction potential is investigated. The conditions that there exists a solution which is stable and represents a late-time accelerated expansion of the Universe are found. The variable mass of fermions cannot vanish exactly during the evolution of the Universe once it exists initially. It is shown that the late-time acceleration depends completely on the self-interaction of the fermion field if our investigation is restricted to the theory with positive BD parameter {omega}. Provided a negative {omega} is allowed, there will be another two classes of stable solutions describing the late-time accelerated expansion of the Universe.

  5. Magnetized chameleonic Brans-Dicke cosmology and phase space analysis

    NASA Astrophysics Data System (ADS)

    Sharif, M.; Waheed, Saira

    2014-05-01

    This paper deals with the study of dynamical or phase space analysis of Bianchi I universe in Brans-Dicke gravity with chameleon scalar field. For this purpose, the matter contents are taken to be perfect fluid with magnetic field effects described by the non-linear Maxwell Lagrangian density. By taking some ansatz for the field potential and the interaction function in chameleon cosmology, we discuss three cases: Bianchi I universe with perfect fluid, FRW universe with magnetized perfect fluid and Bianchi I universe with magnetized perfect fluid. In all cases, we calculate fixed or critical points and discuss stability of the respective configuration for radiation as well as matter dominated eras. We also evaluate some cosmological parameters in each case for matter dominated era only and investigate their cosmological implications.

  6. Entanglement, chaos and atomic Wigner function of the Dicke model

    E-print Network

    L. Sanz; K. Furuya

    2005-07-04

    We calculate the atomic (spin) Wigner function for the single mode Dicke model in the regime of large number of two-level atoms. The dynamics of this quasi-probability function on the Bloch sphere allows us to visualize the consequences of the entanglement process between the boson and the spin subsystems. Such investigation shows a distinct localization behavior of the spin state with respect to the polar and azimuthal Bloch sphere angles. A complete {\\em breakdown of reflection symmetry} in the azimuthal angle is shown in the non-integrable case, even at short evolution times. Also, in the classically chaotic situation, the appearance of {\\em sub-planck structures} in the Wigner function is shown, and its evolution analyzed.

  7. Phase transition in the periodically pulsed Dicke model

    NASA Astrophysics Data System (ADS)

    Dasgupta, Sayak; Bhattacharya, Utso; Dutta, Amit

    2015-05-01

    We study the effect of pulsed driving and kicked driving of the interaction term on the nonequilibrium phase transition in the Dicke model. Within the framework of Floquet theory, we observe the emergence of new nontrivial phases on impingement by such periodic pulses. Notably, our study reveals that a greater control over the dynamical quantum criticality is possible through the variation of multiple parameters related to the pulse, as opposed to a single parameter control in a monochromatic drive. Furthermore, the probability of the system remaining trapped in a metastable state during the observed first order transition from the superradiant to normal phase is found to be higher for small number of kicks (or pulses) in comparison to the sinusoidal perturbation.

  8. Renormalization group improved gravitational actions: a Brans-Dicke approach

    E-print Network

    Reuter, M

    2004-01-01

    A new framework for exploiting information about the renormalization group (RG) behavior of gravity in a dynamical context is discussed. The Einstein-Hilbert action is RG-improved by replacing Newton's constant and the cosmological constant by scalar functions in the corresponding Lagrangian density. The position dependence of $G$ and $\\Lambda$ is governed by a RG equation together with an appropriate identification of RG scales with points in spacetime. The dynamics of the fields $G$ and $\\Lambda$ does not admit a Lagrangian description in general. Within the Lagrangian formalism for the gravitational field they have the status of externally prescribed ``background'' fields. The metric satisfies an effective Einstein equation similar to that of Brans-Dicke theory. Its consistency imposes severe constraints on allowed backgrounds. In the new RG-framework, $G$ and $\\Lambda$ carry energy and momentum. It is tested in the setting of homogeneous-isotropic cosmology and is compared to alternative approaches where ...

  9. Scale transformation, modified gravity, and Brans-Dicke theory

    E-print Network

    F. Darabi

    2010-08-24

    A model of Einstein-Hilbert action subject to the scale transformation is studied. By introducing a dilaton field as a means of scale transformation a new action is obtained whose Einstein field equations are consistent with traceless matter with non-vanishing modified terms together with dynamical cosmological and gravitational coupling terms. The obtained modified Einstein equations are neither those in $f(R)$ metric formalism nor the ones in $f({\\cal R})$ Palatini formalism, whereas the modified source terms are {\\it formally} equivalent to those of $f({\\cal R})=\\frac{1}{2}{\\cal R}^2$ gravity in Palatini formalism. The correspondence between the present model, the modified gravity theory, and Brans-Dicke theory with $\\omega=-\\frac{3}{2}$ is explicitly shown, provided the dilaton field is condensated to its vacuum state.

  10. Embedding, serial sectioning and staining of zebrafish embryos using JB-4 resin.

    PubMed

    Sullivan-Brown, Jessica; Bisher, Margaret E; Burdine, Rebecca D

    2011-01-01

    Histological techniques are critical for observing tissue and cellular morphology. In this paper, we outline our protocol for embedding, serial sectioning, staining and visualizing zebrafish embryos embedded in JB-4 plastic resin-a glycol methacrylate-based medium that results in excellent preservation of tissue morphology. In addition, we describe our procedures for staining plastic sections with toluidine blue or hematoxylin and eosin, and show how to couple these stains with whole-mount RNA in situ hybridization. We also describe how to maintain and visualize immunofluorescence and EGFP signals in JB-4 resin. The protocol we outline-from embryo preparation, embedding, sectioning and staining to visualization-can be accomplished in 3 d. Overall, we reinforce that plastic embedding can provide higher resolution of cellular details and is a valuable tool for cellular and morphological studies in zebrafish. PMID:21212782

  11. Henry's law constant of methanol in pulping spent liquors

    SciTech Connect

    Zhu, J.Y.; Liu, P.H.; Chai, X.S.; Bullock, K.R.; Teja, A.S.

    2000-05-01

    A direct headspace gas chromatographic method was used to measure Henry's constants of methanol in pulping spent liquors. The liquors were from kraft pulp mills and laboratory pulping experiments using various wood species. All liquors studied had a total solid less than 25%. It was found that temperature and concentration of inorganic solids, mainly sodium salts, are the two variables that significantly affect the Henry's constants of methanol. A two- parameter (temperature and liquor total solids content) correlation was developed based on the experimental data and is reported in this study.

  12. Metallic Nickel Nanoparticles May Exhibit Higher Carcinogenic Potential than Fine Particles in JB6 Cells

    PubMed Central

    Bowman, Linda; Zou, Baobo; Mao, Guochuan; Xu, Jin; Castranova, Vincent; Zhao, Jinshun; Ding, Min

    2014-01-01

    While numerous studies have described the pathogenic and carcinogenic effects of nickel compounds, little has been done on the biological effects of metallic nickel. Moreover, the carcinogenetic potential of metallic nickel nanoparticles is unknown. Activator protein-1 (AP-1) and nuclear factor-?B (NF-?B) have been shown to play pivotal roles in tumor initiation, promotion, and progression. Mutation of the p53 tumor suppressor gene is considered to be one of the steps leading to the neoplastic state. The present study examines effects of metallic nickel fine and nanoparticles on tumor promoter or suppressor gene expressions as well as on cell transformation in JB6 cells. Our results demonstrate that metallic nickel nanoparticles caused higher activation of AP-1 and NF-?B, and a greater decrease of p53 transcription activity than fine particles. Western blot indicates that metallic nickel nanoparticles induced a higher level of protein expressions for R-Ras, c-myc, C-Jun, p65, and p50 in a time-dependent manner. In addition, both metallic nickel nano- and fine particles increased anchorage-independent colony formation in JB6 P+ cells in the soft agar assay. These results imply that metallic nickel fine and nanoparticles are both carcinogenetic in vitro in JB6 cells. Moreover, metallic nickel nanoparticles may exhibit higher carcinogenic potential, which suggests that precautionary measures should be taken in the use of nickel nanoparticles or its compounds in nanomedicine. PMID:24691273

  13. Multiple Paternity in Polyandrous Barn Owls (Tyto alba) Isabelle Henry.

    E-print Network

    Alvarez, Nadir

    Multiple Paternity in Polyandrous Barn Owls (Tyto alba) Isabelle Henry. , Sylvain Antoniazza females produce successive clutches with several males. Female barn owls (Tyto alba) often desert Paternity in Polyandrous Barn Owls (Tyto alba). PLoS ONE 8(11): e80112. doi:10.1371/journal.pone.0080112

  14. Battling for Liberty: Tecumseh's and Patrick Henry's Language of Resistance.

    ERIC Educational Resources Information Center

    Gardner, Traci

    The reading program described in this lesson plan extends the study of Patrick Henry's "Give Me Liberty or Give Me Death" speech to demonstrate the ways Native Americans also resisted oppression through rhetoric. During five 50-minute lessons, students will: develop an awareness of both Native and non-Native movements to resist oppression and…

  15. cole doctorale IAEM Lorraine UFR STMIA, Universit Henri Poincar

    E-print Network

    Ritchie, Dave

    École doctorale IAEM Lorraine UFR STMIA, Université Henri Poincaré Mémoire Scientifique Algorithmes Nancy ­ Grand Est Laboratoire Lorrain de Recherche en Informatique et ses Applications ­ UMR 7503 #12'enseignement et les tâches administratives ne m'ont pas laissé beaucoup de temps pour faire de la recherche. Il

  16. Learning to Navigate Through Crowded Environments Peter Henry1

    E-print Network

    Anderson, Richard

    Learning to Navigate Through Crowded Environments Peter Henry1 , Christian Vollmer1,2 , Brian, Seattle, WA 2 Neuroinformatics and Cognitive Robotics Lab, Ilmenau University of Technology, Germany such as indoor shopping malls, airports, or downtown side walks. The key research question addressed

  17. Whitewash: Outsourcing Garbled Circuit Generation for Mobile Henry Carter

    E-print Network

    Whitewash: Outsourcing Garbled Circuit Generation for Mobile Devices Henry Carter Georgia Institute. In this work, we develop a new technique for securely outsourcing the generation of garbled circuits to a Cloud provider. By outsourcing the circuit generation, we are able to eliminate the most costly operations from

  18. Circles, Teenagers, and "Henry V": A Short Shakespeare Residency

    ERIC Educational Resources Information Center

    Eaton, Gillian

    2006-01-01

    The residency about which the author writes was with students at The Roeper School in Birmingham, Michigan. This school is unusual in its support for a liberal arts and process-based education. In this article the author, an accomplished director and Teaching Artist, recounts the many engaging dimensions of a student production of "Henry V."

  19. Learning Influence in Complex Social Networks Henry Franks

    E-print Network

    Sukthankar, Gita Reese

    Learning Influence in Complex Social Networks Henry Franks Department of Computer Science) the extent to which network location imbues influence on an agent, and (iii) the extent to which different network structures affect influence. In this paper, we propose a general methodology for learning

  20. 15. Photocopy of map, drawn by Henry Hagey, circa 1900 ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Photocopy of map, drawn by Henry Hagey, circa 1900 (from Willing Inhabitants, original in possession of author, Joyce Munro). FRANCONIA TOWNSHIP MAP. BRIDGE LOCATION IN BOTTOM CENTER - Allentown Road Bridge, Spanning Skippack Creek on Allentown Road, Franconia, Montgomery County, PA

  1. HENRI D. GRISSINO-MAYER Department of Geography

    E-print Network

    Grissino-Mayer, Henri D.

    Awards, Department of Geography, 2001, 2008, 2009 Team Excellence Award, Department of Human Resources­ 1 ­ HENRI D. GRISSINO-MAYER Department of Geography The University of Tennessee Knoxville), Geography, University of Georgia (GPA: 3.67) 1988: Master of Arts, Geography, University of Georgia (GPA: 4

  2. Sculptures in S3 Saul Schleimer Henry Segerman

    E-print Network

    Schleimer, Saul

    Sculptures in S3 Saul Schleimer Henry Segerman Mathematics Institute Department of Mathematics Australia s.schleimer@warwick.ac.uk segerman@unimelb.edu.au Abstract We construct a number of sculptures we transfer the design from the three-sphere to ordinary Euclidean space. All of the sculptures

  3. Sculptures in S3 Saul Schleimer and Henry Segerman

    E-print Network

    Schleimer, Saul

    Sculptures in S3 Saul Schleimer and Henry Segerman Abstract We describe the construction of a number of sculptures. Each is based on a geometric design native to the three- sphere: the unit sphere space. All of the sculptures are then fabricated by the 3D printing service Shapeways. 1 Introduction

  4. The explosion problem in a flow Henri Berestycki

    E-print Network

    Novikov, Alexei

    The explosion problem in a flow Henri Berestycki Alexander Kiselev Alexei Novikov Lenya Ryzhik§ March 19, 2008 Abstract We consider the explosion problem in an incompressible flow introduced in [5]. We use a novel Lp - L estimate for elliptic advection-diffusion problems to show that the explosion

  5. 10. Historic American Buildings Survey Photocopy, Henry Austin's Drawing EAST ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    10. Historic American Buildings Survey Photocopy, Henry Austin's Drawing EAST SIDE ELEVATION Restricted: Permission for use must be obtained in writing from the Beinecke Rare Book and Manuscript Library Yale University, New Haven, Conn. - Willis Bristol House, 584 Chapel Street, New Haven, New Haven County, CT

  6. 4. Historic American Buildings Survey Photocopy, Henry Austin's Drawing c. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    4. Historic American Buildings Survey Photocopy, Henry Austin's Drawing c. 1845 Restricted: Permission for use must be obtained in writing from Beinecke Rare Book and Manuscript Library Yale University, New Haven, Conn. - Grove Street Cemetery Entrance, 227 Grove Street, New Haven, New Haven County, CT

  7. Henry's law constants for dimethylsulfide in freshwater and seawater

    NASA Technical Reports Server (NTRS)

    Dacey, J. W. H.; Wakeham, S. G.; Howes, B. L.

    1984-01-01

    Distilled water and several waters of varying salinity were subjected, over a 0-32 C temperature range, to measurements for Henry's law constants for dimethylsulfide. Values for distilled water and seawater of the solubility parameters A and C are obtained which support the concept that the concentration of dimethylsulfide in the atmosphere is far from equilibrium with seawater.

  8. SURFING BRACHISTOCHRONES Bruce Henry and Simon Watt 1

    E-print Network

    Henry, Bruce Ian

    SURFING BRACHISTOCHRONES by Bruce Henry and Simon Watt 1 One of the most famous problems examine two surfing manoeuvres involving brachistochrones. The first calculation presented shows­ tical mechanics of fractal pattern formation. Here they take time out to go surfing. 2 Excellent sources

  9. Strategic Plan The Henry Samueli School of Engineering

    E-print Network

    George, Steven C.

    Strategic Plan The Henry Samueli School of Engineering University of California, Irvine 5 February and repository of the input, and was responsible for drafting values, vision, and mission statements. The nine 7. Space Needs and Planning 8. Diversifying the Faculty, Staff and Student Body 9. Resource Goals

  10. USING THE STATIC HEADSPACE METHOD TO DETERMINE HENRY'S LAW CONSTANTS

    EPA Science Inventory

    A new, accurate, and experimentally simple method has been developed to determine dimensionless Henry's law constants using the static headspace method. he method appears applicable to a wide range of volatile and semivolatile organic compounds. he method work well even for methy...

  11. The Visual Language of Experts in Graphic Design Henry Lieberman

    E-print Network

    The Visual Language of Experts in Graphic Design Henry Lieberman Media Laboratory Massachusetts Institute of Technology Cambridge, Mass. USA lieber@media.mit.edu ABSTRACT Graphic designers and other is communicated between humans in graphic design. Nowhere is the process of design communication more critical

  12. America's Earliest Revolutionary Voice: Po-Pay--Not Patrick Henry.

    ERIC Educational Resources Information Center

    Owen, Gordon R.

    A full century before Patrick Henry's persuasive battle for the rights of oppressed people, a San Juan Pueblo Indian medicine man known only as Po-Pay was the masterful communicator and agitator who orchestrated the first American revolution to drive the Spanish back into Mexico. Seeking mineral wealth, cheap labor, and the maximum number of…

  13. Henry Charlton Bastian (1837–1915): Neglected Neurologist and Scientist

    Microsoft Academic Search

    J. M. S. Pearce

    2010-01-01

    Henry Charlton Bastian was born in Truro, Cornwall. He graduated in 1861 at the University College, London, where he worked most of his life. He was one of the first neurologists appointed to the National Hospital, Queen Square. There, he conducted original investigations and pursued wide interests both in medical and biological sciences. He was elected a Fellow of the

  14. SILVER--2000 70.1 By Henry E. Hilliard

    E-print Network

    SILVER--2000 70.1 SILVER By Henry E. Hilliard Domestic survey data and tables were prepared, international data coordinator. The difference between the high and low prices for silver in 2000 was less than ounce was reached, the silver price moved steadily downward in 2000 to an average of $5.00 per ounce, 5

  15. SILVER--1998 69.1 By Henry E. Hilliard

    E-print Network

    SILVER--1998 69.1 SILVER By Henry E. Hilliard Domestic survey data and tables were prepared. Wallace, international data coordinator. In 1998, the average price of silver in was $5.54 per troy ounce, especially in photography. The photography and decorative sectors were the largest consumers of silver owing

  16. SILVER--1999 69.1 By Henry E. Hilliard

    E-print Network

    SILVER--1999 69.1 SILVER By Henry E. Hilliard Domestic survey data and tables were prepared, international data coordinator. In 1999, the average annual price of silver was $5.25 per troy ounce, down from sectors were the largest consumers of silver owing mainly to the metal's application in a wide variety

  17. Formalizing Anonymous Blacklisting Systems1 Ryan Henry and Ian Goldberg

    E-print Network

    Goldberg, Ian

    Formalizing Anonymous Blacklisting Systems1 Ryan Henry and Ian Goldberg Cheriton School of Computer Science University of Waterloo Waterloo, ON, Canada N2L 3G1 {rhenry,iang}@cs.uwaterloo.ca Abstract--Anonymous to communicate privately over the Internet. However, in doing so, anonymous communications networks introduce

  18. Socially Intelligent Combat Air Simulator Henry Hexmoor *, Xin Zhang *

    E-print Network

    Hexmoor, Henry

    Socially Intelligent Combat Air Simulator Henry Hexmoor *, Xin Zhang * Department of Computer that requires reasoning about roles and social influences. Towards that end we describe our implemented testbed developments are similar but the intent is for the agents to autonomously determine when and how they work

  19. Resonances in rotationally inelastic scattering of OH(X2) with helium and Koos B. Gubbels, Qianli Ma, Millard H. Alexander, Paul J. Dagdigian, Dick Tanis et al.

    E-print Network

    , Qianli Ma, Millard H. Alexander, Paul J. Dagdigian, Dick Tanis et al. Citation: J. Chem. Phys. 136. Dagdigian,3 Dick Tanis,2 Gerrit C. Groenenboom,2 Ad van der Avoird,2 and Sebastiaan Y. T. van de Meerakker2

  20. Published Ahead of Print 11 November 2011. 2012, 194(2):509. DOI: 10.1128/JB.06211-11.J. Bacteriol.

    E-print Network

    Guttman, David S.

    - nothece, many of which appear to encompass known virulence genes, including genes encoding toxins, enzymes, a Miniature, Virulence-Associated http://jb.asm.org/content/194/2/509 Updated information and services can: onDecember29,2011byguesthttp://jb.asm.org/Downloadedfrom #12;E622, a Miniature, Virulence

  1. arXiv:1008.1844v1[cond-mat.other]11Aug2010 Poor man's derivation of the Bethe-Ansatz equations for the Dicke model

    E-print Network

    von Delft, Jan

    for the Dicke model Oleksandr Tsyplyatyev,1 Jan von Delft,2 and Daniel Loss1 1 Department of Physics, University present an elementary derivation of the exact solution (Bethe-Ansatz equations) of the Dicke model, using only commutation relations and an informed Ansatz for the structure of its eigenstates. In 1954, Dicke

  2. Hello Geisel students We have been working hard to continue to improve your access and care at Dick's House. This email

    E-print Network

    Myers, Lawrence C.

    Hello Geisel students We have been working hard to continue to improve your access and care at Dick's House. This email contains some wonderful news: On line appointment scheduling for Dicks House://geiselmed.dartmouth.edu/students/resources/pdf/maps.pdf ). You will soon be receiving an updated Dick's House FAQ that contains this information in addition

  3. The University of Edinburgh is a charitable body, registered in Scotland, with registration number SC005336 ROYAL (DICK) SCHOOL OF VETERINARY STUDIES

    E-print Network

    Hall, Christopher

    SC005336 ROYAL (DICK) SCHOOL OF VETERINARY STUDIES The University of Edinburgh Easter Bush Veterinary an application by The Royal (Dick) School of Veterinary Studies, University of Edinburgh for an Athena SWAN Equality. The Royal (Dick) School of Veterinary Studies supports and engages with University initiatives

  4. f(R) Gravities à la Brans-Dicke

    E-print Network

    Tonguç Rador

    2007-07-10

    We extend f(R) theories via the addition of a fundamental scalar field. The approach is reminiscent of the dilaton field of string theory and the Brans-Dicke model. f(R) theories attracted much attention recently in view of their potential to explain the acceleration of the universe. Extending f(R) models to theories with scalars can be motivated from the low energy effective action of string theory. There, a fundamental scalar (the dilaton), has a non-minimal coupling to the Ricci scalar. Furthermore beyond tree level actions will contain terms having higher (or lower) powers of R compared to the canonical Einstein-Hilbert term. Theories with f(R) will contain an extra scalar degree on top of the ad-hoc dilaton and mixing of these two modes around a stable solution is a concern. In this work we show that no mixing condition mandates the form $V_{1}(\\phi)f(R)+V_{2}(\\phi)R^{2}$ for the action.

  5. Modified Brans-Dicke theory in arbitrary dimensions

    NASA Astrophysics Data System (ADS)

    Rasouli, S. M. M.; Farhoudi, Mehrdad; Vargas Moniz, Paulo

    2014-06-01

    Within an algebraic framework, used to construct the induced-matter-theory (IMT) setting, in (D + 1)-dimensional Brans-Dicke (BD) scenario, we obtain a modified BD theory (MBDT) in D dimensions. Being more specific, from the (D + 1)-dimensional field equations, a D-dimensional BD theory, bearing new features, is extracted by means of a suitable dimensional reduction onto a hypersurface orthogonal to the extra dimension. In particular, the BD scalar field in such D-dimensional theory has a self-interacting potential, which can be suitably interpreted as produced by the extra dimension. Subsequently, as an application to cosmology, we consider an extended spatially flat FLRW geometry in a (D + 1)-dimensional space-time. After obtaining the power-law solutions in the bulk, we proceed to construct the corresponding physics, by means of the induced MBDT procedure, on the D-dimensional hypersurface. We then contrast the resulted solutions (for different phases of the universe) with those usually extracted from the conventional GR and BD theories in view of current ranges for cosmological parameters. We show that the induced perfect fluid background and the induced scalar potential can be employed, within some limits, for describing different epochs of the universe. Finally, we comment on the observational viability of such a model.

  6. Radiation drag in Brans-Dicke theory of gravity

    NASA Astrophysics Data System (ADS)

    Oh, Jae Sok

    2015-01-01

    The orbital motion of a test particle near a non-rotating star with a high and uniform luminosity is explored in the context of the Brans-Dicke gravity. Just as in the Einstein gravity, from the equation of motion for the test particle, we found that a "suspension surface" exists, where the test particle comes to rest. Unlike in the Einstein gravity, the radial position of the suspension surface depends on the BD parameter ? as well as the luminosity of the star, but is independent of the initial position and velocity of the particle. As the BD parameter ? gets larger, the position of the "suspension surface" in the BD gravity approaches that in the Einstein gravity as it should. However, when the value of the parameter ? is small, i.e., ? ~ 1, the suspension's position in the BD gravity deviates significantly from that in the Einstein gravity. Among others, however, the most remarkable lesson we learned in the present study is that the true and detailed nature of an alternative theory of gravity is not available in the complete absence of a test particle with motion.

  7. Observational signatures of Jordan-Brans-Dicke theories of gravity

    E-print Network

    Viviana Acquaviva; Licia Verde

    2008-01-06

    We analyze the Jordan-Brans-Dicke model (JBD) of gravity, where deviations from General Relativity (GR) are described by a scalar field non-minimally coupled to gravity. The theory is characterized by a constant coupling parameter, $\\omega_{\\rm JBD}$; GR is recovered in the limit $\\omega_{\\rm JBD} \\to \\infty$. In such theories, gravity modifications manifest at early times, so that one cannot rely on the usual approach of looking for inconsistencies in the expansion history and perturbations growth in order to discriminate between JBD and GR. However, we show that a similar technique can be successfully applied to early and late times observables instead. Cosmological parameters inferred extrapolating early-time observations to the present will match those recovered from direct late-time observations only if the correct gravity theory is used. We use the primary CMB, as will be seen by the Planck satellite, as the early-time observable; and forthcoming and planned Supernov{\\ae}, Baryonic Acoustic Oscillations and Weak Lensing experiments as late-time observables. We find that detection of values of $\\omega_{\\rm JBD}$ as large as 500 and 1000 is within reach of the upcoming (2010) and next-generation (2020) experiments, respectively.

  8. Air-Liquid Partition Coefficient for a Diverse Set of Organic Compounds: Henry?s Law Constant in Water and Hexadecane

    EPA Science Inventory

    The SPARC vapor pressure and activity coefficient models were coupled to estimate Henry?s Law Constant (HLC) in water and in hexadecane for a wide range of non-polar and polar solute organic compounds without modification to/or additional parameterization of the vapor pressure or...

  9. 77 FR 35373 - Duke Energy Dicks Creek, LLC; Supplemental Notice That Initial Market-Based Rate Filing Includes...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-06-13

    ...Regulatory Commission [Docket No. ER12-1951-000] Duke Energy Dicks Creek, LLC; Supplemental Notice That Initial Market-Based...supplemental notice in the above-referenced proceeding of Duke Energy Dicks Creek, LLC's application for market-based rate...

  10. Obituary: Roy Henry Garstang (1925-2009)

    NASA Astrophysics Data System (ADS)

    Malville, J.

    2011-12-01

    Roy Henry Garstang 84 passed away on November 1, 2009 in Boulder Colorado. He was born in Southport, England in September of 1925 to Percy Brocklehurst and Eunice (Gledhill) Garstang. He won a scholarship to Caius College in Cambridge University. Because it was wartime, he could spend only two years at his studies. However, he managed to complete three years of required work during that time, and then spent 1945-46 as a Junior Scientific Officer at the Royal Aircraft Establishment at Farnborough. He received his BA in 1946 from Cambridge, his MA in 1950, and his PhD in Mathematics in 1954, with a thesis: "Atomic Transitions in Astrophysics," working under D. R. Hartree. He also received a ScD from Cambridge in Physics and Chemistry in 1983. He married Ann in August 1959. She and two daughters, Jennifer and Susan, survive him. While still pursuing his PhD, Roy Garstang served as a Research Associate at the Yerkes Observatory, from 1951-1952, working under Subrahmanyan Chandrasekhar. During that time he continued with his own calculations of atomic structure and transition probabilities, although these were not part of Chandra's research interests. After earning his PhD, he went to teach at the University of London, where he also served as the Assistant Director of the University of London Observatory (1959-1964). He was editor of "The Observatory" Magazine form 1953-1960. The continuing theme of this research was to help meet the needs of astrophysicists for atomic data. In 1964, he left England for the United States, where he joined the faculty at the University of Colorado, Boulder, where he would remain for the rest of his professional career. It was entirely fitting, considering his interest in performing calculations of interest to astrophysicists, that soon after arriving in Boulder he was appointed Chairman of JILA - Joint Institute for Laboratory Astrophysics (1966-1967). He was Director of the Division of Physics and AstroGeophysics (1979-80), acting Director of the Fiske Planetarium (1980-81), Chair of the Faculty Assembly (1988-1989) and recipient of the Faculty Assembly Excellence in Service Award in 1990. During his career Garstang was active in a number of professional organizations, including the British Astronomical Association (two-term Vice President) and Sigma Xi for which he was the Secretary of the University of Colorado for 20 years. He was a Fellow of the American Association for the Advancement of Science, the American Physical Society the American Physical Society, the Optical Society of America, the Royal Astronomical Society, the Institute of Physics (British), the Royal Statistical Society, and the Cambridge Philosophical Society. He published more than 150 articles in scientific journals. Roy Garstang was the consummate resource for atomic calculations needed by the astrophysical community. His first scientific paper published when he was a graduate student in 1950 was "Some line strengths for ionized neon" (Monthly Notices of the Royal Astronomical Society 110: 612-614) and some 55 papers later, in 1981 he published calculations on neutral technetium "Oscillator strengths for neutral technetium" (PASP 93:641. 1981). A continuing interest of his was forbidden transitions, such as are important in the solar corona, aurora, planetary nebula, and nova shells. He made important calculations of the energy levels and spectra of highly ionized species of iron and worked extensively on magnetic quadrupole radiation, which proved to be important in the solar corona. Garstang also studied the effects of strong magnetic field on atomic spectra, ranging from the thousand gauss fields of sunspots to megagauss fields of white dwarfs. He was internationally recognized for his work on light pollution, which turned into a major course change for him, becoming his primary research interest after 1984. Between 1984 and 2007, he published 40 scientific papers of which 37 concerned sky brightness in one way or another. He constructed and modified a light pollution model (Dus

  11. The Replicon of the Cryptic Plasmid pSBO1 Isolated from Streptococcus bovis JB1

    Microsoft Academic Search

    Mutsumi Nakamura; Koretsugu Ogata; Takafumi Nagamine; Kiyoshi Tajima; Hiroki Matsui; Yoshimi Benno

    2001-01-01

    The cryptic plasmid pSBO1 (3904 bp) was isolated from Streptococcus bovis JB1. pSBO1 contained an open reading frame (ORF) that is homologous to sequences encoding the replication protein (Rep) in\\u000a pEFC1 (isolated from Enterococcus faecalis), pSK639 (Staphylococcus epidermidis), pLA103 (Lactobacillus acidophilus), and pUCL287 (Tetragenococcus halophila). In addition, four 22-bp direct repeats (DRs) were located upstream of the putative replication gene

  12. Development of a New Shielding Model for JB-Line Dose Rate Calculations

    SciTech Connect

    Buckner, M.R.

    2001-08-09

    This report describes the shielding model development for the JB-Line Upgrade project. The product of this effort is a simple-to-use but accurate method of estimating the personnel dose expected for various operating conditions on the line. The current techniques for shielding calculations use transport codes such as ANISN which, while accurate for geometries which can be accurately approximated as one dimensional slabs, cylinders or spheres, fall short in calculating configurations in which two-or three-dimensional effects (e.g., streaming) play a role in the dose received by workers.

  13. Gravitational constraints of dS branes in AdS Einstein-Brans-Dicke bulk

    E-print Network

    J. M. Hoff da Silva; Roldao da Rocha

    2010-06-27

    We derive the full projected Einstein-Brans-Dicke gravitational equations associated with a n-dimensional brane embedded in a (n+1)-dimensional bulk. By making use of general conditions, as the positivity of the Brans-Dicke parameter and the effective Newton gravitational constant as well, we are able to constrain the brane cosmological constant in terms of the brane tension, the Brans-Dicke scalar field, and the trace of the stress tensor on the brane, in order to achieve a $dS$ brane. Applying these constraints to a specific five-dimensional model, a lower bound for the scalar field on the brane is elicited without solving the full equations. It is shown under which conditions the brane effective cosmological constant can be ignored in the brane projected gravitational field equations, suggesting a different fine tuning between the brane tension and the bulk cosmological.

  14. Modified Brans-Dicke gravitational theory with nonzero divergence of the energy-momentum tensor

    NASA Technical Reports Server (NTRS)

    Smalley, L. L.

    1974-01-01

    The Brans-Dicke theory of gravitation is modified by assuming that the divergence of the energy-momentum tensor is proportional to the covariant derivative of the scalar curvature. No ad hoc additions to the usual Brans-Dicke field equations are required as in Rastall's modification of the Einstein theory or as in the steady-state theories, of which this is a natural possibility. Three parameters emerge from the theory - namely, the unnormalized gravitational constant, the usual Brans-Dicke parameter, and the proportionality constant. In the post-Newtonian approximation, these parameters can be fixed by experiment. However, there exists a certain choice of the parameters for which the theory reduces to an Einstein theory with constant scalar curvature.

  15. Thermodynamical Behaviors of Nonflat Brans-Dicke Gravity with Interacting New Agegraphic Dark Energy

    NASA Astrophysics Data System (ADS)

    Wu, Ya-Bo; Zhang, Xue; Lu, Jian-Bo; Zhao, Yue-Yue; Lu, Jun-Wang; Yu, Fang

    2014-12-01

    The dynamical behaviors of Brans-Dicke gravity with the interacting new agegraphic dark energy (NADE) model are studied in this paper. First of all, by considering the dark energy density ?de = 3n2??-2, the evolutions of the equation of state and the deceleration parameter can be described in the framework of Friedmann-Robertson-Walker universe. Moreover, the field equations of the Brans-Dicke gravity can be cast to the form of the first law of thermodynamics with the so-called entropy production term d˜ {S}. Furthermore, the generalized second law of thermodynamics can be given in nonflat Brans-Dicke gravity with the interacting NADE enclosed by the dynamical apparent horizon with Hawking temperature. Finally, when the interaction between NADE and dark matter is considered as a fluctuation around the thermal equilibrium, it can be written to a form of logarithmic correction, and the expression of the interaction term can be obtained.

  16. Vacuum Energy and Primordial Black Holes in Brans-Dicke Theory

    NASA Astrophysics Data System (ADS)

    Dwivedee, D.; Nayak, B.; Singh, L. P.

    2015-07-01

    In our work, we study the evolution of primordial black holes within the context of Brans-Dicke theory by assuming present universe as vacuum dominated. We also consider the accretion of radiation, matter and vacuum energy only during respective dominant periods. From our study, we found that the accretion rate is slower in both radiation and vacuum energy dominated eras in Brans-Dicke theory in comparision with General Theory of Relativity [1]. Thus the PBHs evaporate at a faster rate in Brans-Dicke theory than Standard Cosmology [1], if we consider the presence of vacuum energy in both cases. We also find that vacuum energy accretion efficiency should be less than 0.61.

  17. Determination of Henry's law constants of selected priority pollutants

    SciTech Connect

    Warner, H.P.; Cohen, J.M.; Ireland, J.C.

    1987-07-01

    The Henry's law constants (H) for 41 selected priority pollutants were determined to characterize these pollutants and provide information on their fate as they pass through wastewater treatment systems. All experimental values presented for H are averages of two or more replicates. Calculated values are based on data from many published sources. Many calculated results correspond closely to the experimental values, several deviate significantly, and no values could be calculated for some compounds due to insufficient data.

  18. Twilight of the gods: John Henry Mackay's Der Unschuldige.

    PubMed

    Kennedy, H

    1993-01-01

    The writings of the Scotch-German John Henry Mackay are important for the early cultural history of the modern gay movement. This article recalls this unjustly neglected anarchist writer and advocate of man/boy love by tracing his biography and pointing out his contacts with others in the movement. His late novella Der Unschuldige is analyzed to show that Mackay has encoded homosexuality there in a unique and individual way. PMID:8113599

  19. Fiddle Tunes of the Old Frontier: The Henry Reed Collection

    NSDL National Science Digital Library

    The American Folklife Center of the Library of Congress has announced the availability of this new American Memory collection of recorded music. Fiddle Tunes of the Old Frontier features more than 180 original sound recordings of traditional fiddle tunes performed by Henry Reed of Virginia. The recordings are accompanied by field notes taken in 1966-67 by folklorist Alan Jabbour, a glossary of musical terms, 69 musical transcriptions, as well as photographs, and a biographical sketch of Reed's life.

  20. [Assassination of Henri IV, mental disorders and criminal responsibility].

    PubMed

    Bouchard, Jean-Pierre

    2010-01-01

    On 14th May 1610, François Ravaillac, a delusional mystic, assassinated King Henri IV. Under the Ancien Regime, regicide was considered as a supreme act of patricide and received the ultimate punishment even if the perpetrator showed obvious signs of insanity. What would the situation be today? A study of this notorious historical episode provides a reflection on the way dangerousness linked to mental disorders has been viewed and treated over the last four centuries. PMID:21155330

  1. Should bulk cloudwater or fogwater samples obey Henry's law

    SciTech Connect

    Pandis, S.N.; Seinfeld, J.H. (Department of Chemical Engineering and Environmental Quality Laboratory, California Institute of Technology, Pasadena, CA (USA))

    1991-06-20

    In this work we prove that mixing of droplets with different {ital p}H that are individually in Henry's law equilibrium with the surrounding atmosphere always results in a bulk mixture that is supersaturated with weak acids like S(IV) and HCOOH and bases like NH{sub 3} with respect to the original atmosphere. The degree of supersaturation of the bulk liquid water sample for a particular species depends on its dissociation constant, on the initial {ital p}H of the bulk droplet mixture, and on the distribution of the {ital p}H and of the liquid water over the droplet spectrum. High supersaturations result only when the {ital p}H of the bulk droplet mixture exceeds the {ital p}K{sub {ital a}} of the species, in which {ital p}H range large {ital p}H differences among droplets of different sizes lead to large deviations from Henry's law for the bulk mixture. The deviation is shown to depend on the ratio of the arithmetic mean to the harmonic mean of the hydrogen ion concentrations of the droplets with the liquid water content used was weighting factor in the calculation of the means. The theory developed can explain observed discrepancies from Henry's law in atmospheric samples and also other observed phenomena like the reported increase of {ital p}H values of bulk aqueous samples during storage. {copyright} American Geophysical Union 1991

  2. Henry's law constants of some environmentally important aldehydes

    SciTech Connect

    Betterton, E.A.; Hoffmann, M.R.

    1988-12-01

    The Henry's law constants of seven aldehydes have been determined as a function of temperature by bubble-column and by head-space techniques. The compounds were chosen for their potential importance in the polluted troposphere and to allow structure-reactivity patterns to be investigated. The results (at 25/degree/C) are as follows (in units of M atm/sup /minus/1/): chloral, 3.44 /times/ 10/sup 5/; glyoxal, greater than or equal to3 /times/ 10/sup 5/; methylglyoxal, 3.71 /times/ 10/sup 3/; formaldehyde, 2.97 /times/ 10/sup 3/; benzaldehyde, 3.74 /times/ 10/sup 1/; hydroxyacetaldehyde, 4.14 /times/ 10/sup 4/; acetaldehyde, 1.14 /times/ 10/sup 1/. A plot of Taft's parameter, ..sigma..sigma*, vs log H* (the apparent Henry's law constant) gives a straight line with a slope of 1.72. H* for formaldehyde is anomalously high, as expected, but the extremely high value for hydroxyacetaldehyde was unexpected and may indicate that ..cap alpha..-hydroxy-substituted aldehydes could have an usually high affinity for the aqueous phase. The intrinsic Henry's law constants, H, corrected for hydration, do not show a clear structure-reactivity pattern for this series of aldehydes.

  3. Ann. Henri Poincare 3 (2002) 107 170 c Birkhauser Verlag, Basel, 2002

    E-print Network

    Griesemer, Marcel

    2002-01-01

    Ann. Henri Poincar´e 3 (2002) 107 ­ 170 c Birkh¨auser Verlag, Basel, 2002 1424-0637/02/010107-64 $ 1.50+0.20/0 Annales Henri Poincar´e Asymptotic Completeness for Rayleigh Scattering J. Fr¨ohlich, M Sect. 10). #12;108 J. Fr¨ohlich, M. Griesemer and B. Schlein Ann. Henri Poincar´e The picture described

  4. Ann. Henri Poincare 4 (2003) 1 22 c Birkhauser Verlag, Basel, 2003

    E-print Network

    Coleman, Piers

    2003-01-01

    Ann. Henri Poincar´e 4 (2003) 1 ­ 22 c Birkh¨auser Verlag, Basel, 2003 1424-0637/03/0401-22 $ 1.50+0.20/0 Annales Henri Poincar´e Many-Body Physics: Unfinished Revolution Piers Coleman Abstract.The study of many physics in the realms of condensed matter physics and its closely related #12;2 Piers Coleman Ann. Henri

  5. {gamma} parameter and Solar System constraint in chameleon-Brans-Dicke theory

    SciTech Connect

    Saaidi, Kh.; Mohammadi, A.; Sheikhahmadi, H. [Department of Physics, Faculty of Science, University of Kurdistan, Sanandaj (Iran, Islamic Republic of)

    2011-05-15

    The post Newtonian parameter is considered in the chameleon-Brans-Dicke model. In the first step, the general form of this parameter and also effective gravitational constant is obtained. An arbitrary function for f({Phi}), which indicates the coupling between matter and scalar field, is introduced to investigate validity of solar system constraint. It is shown that the chameleon-Brans-Dicke model can satisfy the solar system constraint and gives us an {omega} parameter of order 10{sup 4}, which is in comparable to the constraint which has been indicated in [19].

  6. Dark Matter Haloes and Rotation Curves via Brans-Dicke Theory

    E-print Network

    Hongsu Kim

    2005-07-25

    In the present work, the Brans-Dicke (BD) theory of gravity is taken as a possible theory of k-essence. Then starting with the (already known) Brans-Dicke-Schwarzschild solution which can represent the gravitationally bound static configurations of the BD scalar k-essence, issues like whether these configurations can reproduce the observed properties of galactic dark matter haloes have been addressed. It has been realized that indeed the BD scalar k-essence can cluster into dark matter halo-like objects with flattened rotation curves while exhibiting a dark energy-like negative pressure on larger scales.

  7. Husimi distribution and phase space analysis of Dicke model quantum phase transition

    E-print Network

    E. Romera; R. del Real; M. Calixto

    2014-09-19

    The Husimi distribution is proposed for a phase space analysis of quantum phase transitions in the Dicke model of spin-boson interactions. We show that the inverse participation ratio and Wehrl entropy of the Husimi distribution give sharp signatures of the quantum phase transition. The analysis has been done using two frameworks: a numerical treatment and an analytical variational approximation. Additionally we have proposed a new characterization of the Dicke model quantum phase transition by means of the zeros of the Husimi distribution in the variational approach.

  8. Dark Energy from Fifth-Dimensional Brans-Dicke Theory

    NASA Astrophysics Data System (ADS)

    Bahrehbakhsh, Amir F.; Farhoudi, Mehrdad; Vakili, Hajar

    2013-08-01

    Following the approach of the induced-matter theory, we investigate the cosmological implications of a five-dimensional Brans-Dicke (BD) theory, and propose to explain the acceleration of the universe. After inducing in a four-dimensional hypersurface, we classify the energy-momentum tensor into two parts in a way that, one part represents all kind of the matter (the baryonic and dark) and the other one contains every extra terms emerging from the scale factor of the fifth dimension and the scalar field, which we consider as the energy-momentum tensor of dark energy. We also separate the energy-momentum conservation equation into two conservation equations, one for matter and the other for dark energy. We perform this procedure for different cases, without interacting term and with two particular (suitable) interacting terms between the two parts. By assuming the parameter of the state equation for dark energy to be constant, the equations of the model admit the power-law solutions. Though, the noninteracting case does not give any accelerated universe, but the interacting cases give both decelerated and accelerated universes. For the interacting cases, we figure out analytically the acceptable ranges of some parameters of the model, and also investigate the data analysis to test the model parameter values consistency with the observational data of the distance modulus of 580 SNe Ia compiled in Union2.1. For one of these interacting cases, the best fitted values suggest that BD coupling constant (?) is ? -7.75, however, it also gives the state parameter of dark energy (wX) equal to ? -0.67. In addition, the model gives the Hubble and deceleration parameters at the present time to be H? ? 69.4 (km/s)/Mpc and q? ? -0.38 (within their confidence intervals), where the scale factor of the fifth dimension shrinks with the time.

  9. WILLIAM BOULDING William Boulding is the Dean and J.B. Fuqua Professor of Business Administration at the Fuqua

    E-print Network

    Reif, John H.

    Science, the Journal of Marketing, the Journal of Consumer Research, the Harvard Business ReviewWILLIAM BOULDING William Boulding is the Dean and J.B. Fuqua Professor of Business Administration at the Fuqua School of Business, Duke University. His previous roles at Fuqua include Deputy Dean, Senior

  10. WILLIAM BOULDING William Boulding is the Dean and J.B. Fuqua Professor of Business Administration at the Fuqua

    E-print Network

    Reif, John H.

    , the Harvard Business Review, the Journal of Marketing Research and the New England Journal of Medicine. He wonWILLIAM BOULDING William Boulding is the Dean and J.B. Fuqua Professor of Business Administration at the Fuqua School of Business, Duke University. His previous roles at the Fuqua School include Deputy Dean

  11. synthetic aperture radar imagery. Journal of Geophysical Research, 110, B09406, doi:10.1029/2004JB003338.

    E-print Network

    Allen, Richard M.

    synthetic aperture radar imagery. Journal of Geophysical Research, 110, B09406, doi:10.1029/2004JB., 2007. A scaling law for slow earthquakes. Nature, 447, 76­79, doi:10.1038. Johanson, I. A., Fielding, E in Guerrero, Mexico: New results from GPS. Geophys Res Lett, 34, L13309, doi:10.1029/2007GL029912. Linde, A. T

  12. Controlling carbohydrate induced laminitis in horses JB Rowe MJ Lees DW Pethick K Colbourne CC Pollitt3

    E-print Network

    Paris-Sud XI, Université de

    Controlling carbohydrate induced laminitis in horses JB Rowe MJ Lees DW Pethick K Colbourne CC of rapidly fermentable carbohydrate in the form of starch or sugars may develop laminitis. The first step provided that it is administered prior to the carbohydrate challenge. Twenty one horses were used, eight

  13. Feather loss and egg production in broiler breeders A.D. MILLS, J.M. FAURE J.B. WILLIAMS

    E-print Network

    Paris-Sud XI, Université de

    Feather loss and egg production in broiler breeders and layers A.D. MILLS, J.M. FAURE J.B. WILLIAMS The relationships between various parameters of the laying cycle and feather loss from different parts of the body were studied in broiler breeders and layer hens. The pattern of feather loss was similar in both types

  14. Development of Monopole Interaction Models for Ionic Compounds. Part I: Estimation of Aqueous Henry?s Law Constants for Ions and Gas Phase pKa Values for Acidic Compounds

    EPA Science Inventory

    The SPARC (SPARC Performs Automated Reasoning in Chemistry) physicochemical mechanistic models for neutral compounds have been extended to estimate Henry?s Law Constant (HLC) for charged species by incorporating ionic electrostatic interaction models. Combinations of absolute aq...

  15. Mechanical performance of the Dick internal fixator: a clinical study of 75 patients

    Microsoft Academic Search

    P. M. Rommens; F. Weyns; F. Van Calenbergh; J. Goffin; P. L. Broos

    1995-01-01

    A consecutive series of 75 patients with fractures of the thoracolumbar spine, stabilized with the Dick internal fixator, was studied retrospectively. Posttraumatic kyphosis was measured on the preoperative lateral radiograph by the Cobb angle and the wedge angle and the results were compared with angles measured on the radiographs after instrumentation and after removal of the implants. The presence and

  16. Generation of Symmetric Dicke States of Remote Qubits with Linear Optics

    Microsoft Academic Search

    C. Thiel; J. von Zanthier; T. Bastin; E. Solano; G. S. Agarwal

    2007-01-01

    We propose a method for generating all symmetric Dicke states, either in the long-lived internal levels of N massive particles or in the polarization degrees of freedom of photonic qubits, using linear optical tools only. By means of a suitable multiphoton detection technique, erasing Welcher-Weg information, our proposed scheme allows the generation and measurement of an important class of entangled

  17. Stability analysis of holographic dark energy in Brans-Dicke cosmology

    NASA Astrophysics Data System (ADS)

    Farajollahi, H.; Sadeghi, J.; Pourali, M.

    2012-10-01

    We study stability formulation of holographic dark energy in Brans-Dicke theory. The model is constrained with observations. The results verifies the cosmic acceleration in near past. With the stability analysis we find that the universe transits from quintessence to phantom state in near future while approaching a stable state.

  18. Quantum phase transitions and spontaneous symmetry-breaking in Dicke model

    SciTech Connect

    Puebla, R.; Retamosa, J. [Grupo de Fisica Nuclear, Departamento de Fisica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid, Av. Complutense s/n, 28040 Madrid (Spain); Relano, A. [Departamento de Fisica Aplicada I and GISC, Universidad Complutense de Madrid, Av, Complutense s/n, 28040 Madrid (Spain)

    2013-06-10

    A method to find the Excited-States Quantum Phase Transitions (ESQPT's) from paritysymmetry in the Dicke model is studied and presented. This method allows us to stablish a critical energy where ESQPT's take places, and divides the whole energy spectrum in two regions with different properties.

  19. Exact metric for the exterior of a global string in the Brans-Dicke theory

    E-print Network

    B. Boisseau; B. Linet

    1998-02-03

    We determine in closed form the general static solution with cylindrical symmetry to the Brans-Dicke equations for an energy-momentum tensor corresponding to the one of the straight U(1) global string outside the core radius assuming that the Goldstone boson field takes its asymptotic value

  20. Implicit User Re-Authentication for Mobile Sausan Yazji, Xi Chen, Robert P. Dick, Peter Scheuermann

    E-print Network

    Bustamante, Fabián E.

    Implicit User Re-Authentication for Mobile Devices Sausan Yazji, Xi Chen, Robert P. Dick, Peter- thorized access. We propose an implicit user re-authentication system for portable computers that requires by unauthorized users accounts for much of the financial losses due to computer crime [4]. Much of this loss could

  1. Memo To: Faculty and Administrators of Programs Employing GSI's or GSSA's From: Ronald Dick

    E-print Network

    Awtar, Shorya

    deane Memo To: Faculty and Administrators of Programs Employing GSI's or GSSA's From: Ronald Dick of Graduate Student Instructors (GSI's) and Graduate Student Staff Assistants (GSSA's) Date: September 1, 2013 The terms and conditions of employment of Graduate Student Instructors (GSI's) and Graduate Student Staff

  2. Adequacy of the Dicke model in cavity QED: a counter-"no-go" statement

    E-print Network

    András Vukics; Peter Domokos

    2012-06-07

    The long-standing debate whether the phase transition in the Dicke model can be realized with dipoles in electromagnetic fields is yet an unsettled one. The well-known statement often referred to as the "no-go theorem", asserts that the so-called A-square term, just in the vicinity of the critical point, becomes relevant enough to prevent the system from undergoing a phase transition. At variance with this common belief, in this paper we prove that the Dicke model does give a consistent description of the interaction of light field with the internal excitation of atoms, but in the dipole gauge of quantum electrodynamics. The phase transition cannot be excluded by principle and a spontaneous transverse-electric mean field may appear. We point out that the single-mode approximation is crucial: the proper treatment has to be based on cavity QED, wherefore we present a systematic derivation of the dipole gauge inside a perfect Fabry-P\\'erot cavity from first principles. Besides the impact on the debate around the Dicke phase transition, such a cleanup of the theoretical ground of cavity QED is important because currently there are many emerging experimental approaches to reach strong or even ultrastrong coupling between dipoles and photons, which demand a correct treatment of the Dicke model parameters.

  3. Gravity in a stabilized brane world model in five-dimensional Brans-Dicke theory

    E-print Network

    A. S. Mikhailov; Yu. S. Mikhailov; M. N. Smolyakov; I. P. Volobuev

    2008-12-15

    Linearized equations of motion for gravitational and scalar fields are found and solved in a stabilized brane world model in five-dimensional Brans-Dicke theory. The physical degrees of freedom are isolated, the mass spectrum of Kaluza-Klein excitations is found and the coupling constants of these excitations to matter on the negative tension brane are calculated.

  4. Christa McAuliffe and Dick Scobee in Shuttle mission simulator

    NASA Technical Reports Server (NTRS)

    1985-01-01

    Astronaut Francis R. (Dick) Scobee, STS 51-L commander, briefs Payload specialist Sharon Christa McAuliffe about some of the flight systems of the Space Shuttle during a training session in JSC's Shuttle mission simulator. They are on the flight deck with McAuliffe seated at the pilot's station and Scobee at the commander's station.

  5. Super- and subradiant emission of two-level systems in the near-Dicke limit

    E-print Network

    Peter G. Brooke; Karl-Peter Marzlin; James D. Cresser; Barry C. Sanders

    2008-06-16

    We analyze the stability of super- and subradiant states in a system of identical two-level atoms in the near-Dicke limit, i.e., when the atoms are very close to each other compared to the wavelength of resonant light. The dynamics of the system are studied using a renormalized master equation, both with multipolar and minimal-coupling interaction schemes. We show that both models lead to the same result and, in contrast to unrenormalized models, predict that the relative orientation of the (co-aligned) dipoles is unimportant in the Dicke limit. Our master equation is of relevance to any system of dipole-coupled two-level atoms, and gives bounds on the strength of the dipole-dipole interaction for closely spaced atoms. Exact calculations for small atom systems in the near-Dicke limit show the increased emission times resulting from the evolution generated by the strong dipole-dipole interaction. However, for large numbers of atoms in the near-Dicke limit, it is shown that as the number of atoms increases, the effect of the dipole-dipole interaction on collective emission is reduced.

  6. The Life and Times of Dick Ruggles: Gunner on the Atlantic Convoys, Part 2

    E-print Network

    Lanham, Neil

    returned with stories. Dick Ruggles is both. He is a keeper and custodian of the inherited tradition of his area (called Seanachie in Ireland).His stories are as passed on (some from his mother etc and some are folk tales) or from his experience of life...

  7. Gauss-Codazzi Formalism to Braneworld Scenario within Brans-Dicke Theory

    E-print Network

    M. C. B. Abdalla; M. E. X. Guimaraes; J. M. Hoff da Silva

    2008-02-20

    We apply the Gauss-Codacci formalism to brane worlds scenario within the framework of Brans-Dicke gravity. The compactification is taken from six to five dimensions in order to formalize brane-world models with hybrid compactification in scalar-tensor theories.

  8. Pursuing "Moby-Dick" in the Classroom, the Museum, Back in the Classroom, and Beyond.

    ERIC Educational Resources Information Center

    Wallace, Robert K.; Zlatkin, Aaron; Hixson, Lindsay; Kallmeyer, Robert J.; Sekowski, Kristen; Brock, Gina R.; Gallagher, Michael; Fletcher, William Ryan

    1997-01-01

    Describes a university course that explored the novel "Moby Dick" by Herman Melville and its relation to art highlighting the two student initiatives. Provides the opening statements from each of the 12 students at the National Association for Humanities Education Convention from their presentation on the course where they each related their…

  9. Stellar explosion in the weak field approximation of the Brans–Dicke theory

    Microsoft Academic Search

    Victor H. Hamity; Daniel E. Barraco

    2005-01-01

    We treat a very crude model of an exploding star, in the weak field approximation of the Brans–Dicke theory, in a scenario that resembles some characteristic data of a type Ia supernova. The most noticeable feature, in the electromagnetic component, is the relationship between the absolute magnitude at maximum brightness of the star and the decline rate in one magnitude

  10. Stellar explosion in the weak field approximation of the Brans Dicke theory

    Microsoft Academic Search

    Victor H. Hamity; Daniel E. Barraco

    2005-01-01

    We treat a very crude model of an exploding star, in the weak field approximation of the Brans Dicke theory, in a scenario that resembles some characteristic data of a type Ia supernova. The most noticeable feature, in the electromagnetic component, is the relationship between the absolute magnitude at maximum brightness of the star and the decline rate in one

  11. Effects of Dicke superradiance in context of the one-atom maser

    E-print Network

    N. Nayak; A. S. Majumdar; V. Bartzis

    2000-01-07

    We consider a micromaser model to study the influence of Dicke superradiance in the context of the one-atom maser. The model involves a microwave cavity into which two-level Rydberg atoms are pumped in pairs. We consider a random pump mechanism which allows the presence of at most one pair of atoms in the cavity at any time. We analyze the differences between the present system, called the Dicke micromaser, and an equivalently pumped conventional one-atom micromaser. These differences are attributed to the Dicke cooperativity in the two-atom system. We also show that the two-atom Dicke micromaser is equivalent to a one-atom cascade two-photon micromaser. With the introduction of a one-photon detuning, the present theory further describes a true two-photon micromaser. We discuss in detail the role of one-photon detuning in the mechanism of a one-atom two-photon micromaser. This leads us to point out that the two-atom cavity dynamics can be verified by a proper scaling of the results from an equivalent one-atom two-photon micromaser.

  12. Teaching Psychology and Literature: Melancholia as Motivation in the Novels of Dick Francis

    ERIC Educational Resources Information Center

    Wagner, Elaine

    2010-01-01

    Teaching literature from a psychological perspective provides a basis for the study and analysis of human motivation and behavior, as psychology and literature make mutual contributions to the study of both disciplines. Melancholia is a recurring theme in the novels of Dick Francis, and the first-person accounts of despair and depression are…

  13. Dicke narrowing in strong fields - The atom-as-antenna analogy

    Microsoft Academic Search

    J. C. Camparo; R. P. Frueholz; H. G. Robinson

    1989-01-01

    The behavior of Dicke-narrowed line shapes in strong fields in an evacuated wall-coated cell is experimentally investigated. The results indicate that the hypothesis of an inhomogeneous Doppler remnant pedestal is invalid. Rather, the pedestal is homogeneously broadened and is best understood in terms of the oscillator's response to the electromagnetic field's power spectral density as observed in its rest frame.

  14. Dicke narrowing in strong fields: The atom-as-antenna analogy

    Microsoft Academic Search

    J. C. Camparo; R. P. Frueholz; H. G. Robinson

    1992-01-01

    When a radiator (or absorber) suffers velocity-changing collisions that do not perturb its internal state, the oscillator's successive Doppler shifts are motionally averaged. This process (Dicke narrowing) gives rise to a homogeneously broadened sub-Doppler resonance, which is often astride a broad, apparently Doppler width, pedestal. It has long been held that this pedestal is an inhomogeneous remnant of Doppler broadening,

  15. Issues in Automated Visual Surveillance Anthony R. Dick and Michael J. Brooks

    E-print Network

    Brooks, Mike

    to monitor many real time video feeds simultaneously. The goal of automated visual surveillance is to reduce in automated video surveillance. 1 Introduction Automated visual surveillance is currently a hot topicIssues in Automated Visual Surveillance Anthony R. Dick and Michael J. Brooks School of Computer

  16. Effects of Topology Change in Brans-Dicke Theory of Gravity

    Microsoft Academic Search

    Hongsu Kim

    1991-01-01

    Effects of topology change on low energy physics in the framework of Brans-Dicke theory of gravity is studied especially associated with the wormhole physics solution to the cosmological constant problem. It is shown that wormhole effects drive the value of observable effective cosmological constant to zero at later universes whereas to an enormous constant value large enough for the occurrence

  17. Experimentally determined Henry's Law coefficients of phenol, 2-methylphenol and 2-nitrophenol in the temperature range 281-302 K 

    E-print Network

    Harrison, Mark A J; Cape, J Neil; Heal, Mathew R

    2002-01-01

    The Henry’s Law coefficient is a key physical parameter in the partitioning, and hence environmental fate, of a chemical species between air and water. Despite the acknowledged polluting potential of phenol, 2-methylphenol (o-cresol) and 2...

  18. 78 FR 34428 - Missouri Central Railroad Company-Abandonment Exemption-in Cass, Henry, Johnson, and Pettis...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-07

    ...Company--Abandonment Exemption--in Cass, Henry, Johnson, and Pettis Counties...Discontinuance of Service Exemption--in Cass, Henry, Johnson, and Pettis Counties...between milepost 257.283 near Wingate, in Cass County, Mo., and milepost...

  19. The solar and geomagnetic inputs into the JB2008 thermospheric density model for use by CIRA08 and ISO 14222

    NASA Astrophysics Data System (ADS)

    Tobiska, W. Kent

    Solar and geomagnetic indices are described for use in the Jacchia-Bowman 2008 thermospheric density model (JB2008). There are four solar and two geomagnetic indices used by JB2008. The F10.7, S10.7, M10.7, and Y10.7 solar indices are formed using the JB2006 methodology and they map energy from specific solar irradiance sources to major thermospheric layers. Energy that is deposited to the lower thermosphere and mesopause (85-100 km) is now provided. These solar proxies and indices are compliant with the ISO International Standard 21348 for determining solar irradiances. Reference values of the solar indices and proxies for short-term, intermediate-term, solar cycle, and 25-year periods from solar cycle 23 examples are provided for users who want reference values for planning and tests. The ap geomagnetic and Dst ring current indices are used in a two-index formulation that captures both low/unsettled activity and substorms/storms to represent changes to the neutral thermospheric densities as a result of high-latitude Joule heating and charged particle precipitation. The storm effects change the rate of exospheric temperature change, dTc, which affects satellite orbits. Reference values for ap, Dst, and dTc are provided using an example storm of November 20-21, 2003 for users who want reference values for planning and tests. Use of these solar, geomagnetic, and ring current indices in the JB2008 model produces significant improvements in empirical thermospheric density modeling. JB2008 provides standard deviations of approximately 9-10 percent at 400 km, which is a significant decrease from 16 percent 1-sigma uncertainty previously obtained using the Jacchia 70 model.

  20. Rasmont P. 2003. Jean-Henry Fabre pourrait-il observer aujourd'hui tous ces insectes ? pp. 209-220 in Jean-Henri Fabre, un autre regard sur l'insecte. Actes

    E-print Network

    Rasmont, Pierre

    Rasmont P. 2003. Jean-Henry Fabre pourrait-il observer aujourd'hui tous ces insectes ? pp. 209-220 in Jean-Henri Fabre, un autre regard sur l'insecte. Actes du colloque International sur l'Entomologie, 18. Jean-Henri Fabre pourrait-il observer aujourd'hui tous ces insectes? P. Rasmont*, Y. Barbier*, S

  1. COMMUNIQUE DE PRESSE NATIONAL | PARIS | 6 aot 2012 Prix Henri Poincar 2012 : deux jeunes mathmaticiennes

    E-print Network

    Canet, Léonie

    COMMUNIQUE DE PRESSE NATIONAL | PARIS | 6 août 2012 Prix Henri Poincaré 2012 : deux jeunes mathématiciennes françaises récompensées Pour la première fois, le prix Henri Poincaré est décerné à deux jeunes Sylvia Serfaty du laboratoire Jacques-Louis Lions (CNRS/UPMC). Attribué tous les trois ans, ce prix

  2. The behaviour of high Reynolds flows in a driven Charles-Henri BRUNEAU and Mazen SAAD

    E-print Network

    Bruneau, Charles-Henri

    The behaviour of high Reynolds flows in a driven cavity Charles-Henri BRUNEAU and Mazen SAAD Math´eration, 33405 Talence, France Charles-Henri.Bruneau@math.u-bordeaux1.fr, Mazen.Saad@math.u-bordeaux1.fr Abstract

  3. Henry's law, surface tension, and surface adsorption in dilute binary mixtures

    E-print Network

    Henry's law, surface tension, and surface adsorption in dilute binary mixtures Akira Onukia. The solute partitioning between gas and liquid Henry's law and the surface tension change are discussed. A derivation of the Gibbs law =-T is given with being the surface adsorption. Calculated quantities include

  4. Estimation of Henry's Law Constant for a Diverse Set of Organic Compounds from Molecular Structure

    EPA Science Inventory

    The SPARC (SPARC Performs Automated Reasoning in Chemistry) vapor pressure and activity coefficient models were coupled to estimate Henry?s Law Constant (HLC) in water and in hexadecane for a wide range of non-polar and polar organic compounds without modification or additional p...

  5. Molecular Simulation of Henry's Constant at Vapor-Liquid and Liquid-Liquid Phase Richard J. Sadus

    E-print Network

    Molecular Simulation of Henry's Constant at Vapor-Liquid and Liquid-Liquid Phase Boundaries Richard to determine Henry's constant from the residual chemical potential at infinite dilution at the vapor-liquid coexistence. 1. Introduction Henry's constant is a well-known measure of a solute's solubility in a particular

  6. The Legacy of Henri Victor Regnault in the Arts and Sciences Sbastien Poncet, Laboratoire M2P2, France

    E-print Network

    Paris-Sud XI, Université de

    The Legacy of Henri Victor Regnault in the Arts and Sciences Sébastien Poncet, Laboratoire M2P2 the bicentennial of the birth of Henri Victor Regnault, a famous French chemist and physicist and a pioneer to attract new respect and recognition. Keywords: Henri Victor Regnault, organic chemistry, thermodynamics

  7. Axelle BRODIEZ, Secours populaire franais et comits Henri Martin ... (2004) 1/14 LA DOUBLE STRATGIQUE D'ANDR MARTY

    E-print Network

    Paris-Sud XI, Université de

    2004-01-01

    Axelle BRODIEZ, Secours populaire français et comités Henri Martin ... (2004) 1/14 « LA DOUBLE STRATÉGIQUE D'ANDRÉ MARTY : SECOURS POPULAIRE FRANÇAIS ET COMITÉS HENRI MARTIN » Axelle BRODIEZ Doctorante en Histoire, Université Paris 8 janvier 2004. Si la campagne Henri Martin, acmé de la campagne communiste

  8. Un Arnauld l'htel de Rambouillet. Note sur un pome inconnu de Henri Arnauld, vque jansniste d'Angers

    E-print Network

    Paris-Sud XI, Université de

    Un Arnauld à l'hôtel de Rambouillet. Note sur un poème inconnu de Henri Arnauld, évêque janséniste d'Angers Henri Arnauld fait figure de parangon de l'évêque janséniste. Quand, par la bulle Regiminis apostolici, le pape Alexandre VII édicte un formulaire le 15 février 1665, Henri Arnauld est l'un des quatre

  9. Henri Poincare, a scientific biography; by Jeremy Gray, Princeton University Press, 2012, xiii + 592 pp. 24.95

    E-print Network

    Verhulst, Ferdinand

    Henri Poincar´e, a scientific biography; by Jeremy Gray, Princeton University Press, 2012, xiii of Henri Poincar´e (1854-1912), this is to some extent not a serious issue as he was one of the most theory. The Italian mathematician Vito Volterra described Henri Poincar´e as "an impressionist among

  10. Publications of CITE Staff 2001/2002 Boyd, S., & Henri, J. (2001). Developing power: a study of teacher librarian's

    E-print Network

    Tam, Vincent W. L.

    2001-01-01

    Publications of CITE Staff 2001/2002 Boyd, S., & Henri, J. (2001). Developing power: a study. Dillon, K., Henri, J., & McGregor, J. (Eds.) (2002). Providing more with less: collection management. Eustace, K., McAfee, M., Sherman, S., Henri, J., & Meloche, J. (2001). Object-oriented conferencing

  11. A Laboratory Experiment To Measure Henry's Law Constants of Volatile Organic Compounds with a Bubble Column and a Gas

    E-print Network

    Lee, Shan-Hu

    /Manipulatives, Atmospheric Chemistry, Equilibrium, Thermodynamics Henry's law constant represents the solubility of a soluteA Laboratory Experiment To Measure Henry's Law Constants of Volatile Organic Compounds experiment is described to measure Henry's law constants of organic compounds using a bubble column and gas

  12. Editing Cavendish: Maxwell and The Electrical Researches of Henry Cavendish

    E-print Network

    Falconer, Isobel

    2015-01-01

    During the last five years of his life, 1874-79, James Clerk Maxwell was absorbed in editing the electrical researches of Henry Cavendish, performed 100 years earlier. This endeavour is often assumed to be a work of duty to the Cavendish family, and an unfortunate waste of Maxwell's time. By looking at the history of Cavendish's papers, and the editorial choices that Maxwell made, this paper questions this assumption, considering the importance of Cavendish's experiments in Maxwell's electrical programme, and the implications that he may have derived for developing a doctrine of experimental method.

  13. Vapour pressures, aqueous solubilities, Henry’s Law constants, and octanol\\/water partition coefficients of a series of mixed halogenated dimethyl bipyrroles

    Microsoft Academic Search

    Sheryl A. Tittlemier; Eric Braekevelt; Thor Halldorson; Christopher M. Reddy; Ross J. Norstrom

    2004-01-01

    Basic physical–chemical properties of five bromine and chlorine containing mixed halogenated dimethyl bipyrroles (HDBPs) were determined using established methods. Subcooled liquid vapour pressures (PL,25o), aqueous solubilities (Sw,25), and octanol\\/water partition coefficients (Kow) were determined using the gas chromatography-retention time, generator column, and slow-stirring methods, respectively. Henry’s Law constants (H25) were estimated using experimentally-derived PLo and Sw,25 data. Values of all

  14. A New Empirical Thermospheric Density Model JB2006 using New Solar Indices

    NASA Technical Reports Server (NTRS)

    Bowman, Bruce R.; Tobiska, W. Kent; Marcos, Frank A.

    2006-01-01

    A new empirical atmospheric density model is developed using the CIRA72 (Jacchia 71) model as the basis for the diffusion equations. New solar indices based on orbit based sensor data are used for the solar irradiances in the extreme and far ultraviolet wavelengths. New exospheric temperature and semiannual density equations are employed to represent the major thermospheric density variations. Temperature correction equations are also developed for diurnal and latitudinal effects, and finally density correction factors are used for model corrections required at high altitude (1500-4000 km). The new model, Jacchia-Bowman 2006, is validated through comparisons of accurate daily density drag data previously computed for numerous satellite. For 400 km altitude the standard deviation of 16% for the standard Jacchia model is reduced to 10% for the new JB2006 model for periods of low geomagnetic storm activity.

  15. FACULTE DES SCIENCES ET TECHNIQUES U.F.R. des Sciences et Techniques Mathmatiques, Informatique, Automatique de l'Universit Henri Poincar, Nancy I.

    E-print Network

    Paris-Sud XI, Université de

    , Automatique de l'Université Henri Poincaré, Nancy I. Ecole doctorale I.A.E+M. Département de Formation'Université Henri Poincaré, Nancy I en Génie Electrique par Philippe MASSON Étude d'écrans supraconducteurs à haute Maître de conférence, Université Henri Poincaré, Nancy I. A. REZZOUG Professeur, Université Henri

  16. Henry's Law Coefficient (Solubility) of Toluene in Water with GC-FID A laboratory experiment for junior level undergraduate Analytical Chemistry Lab course

    E-print Network

    Lee, Shan-Hu

    , R., Henrys Law constants (solubilities), http://www.mpch- mainz.mpg.de/~sander/res/henry.html#21 Henry's Law Coefficient (Solubility) of Toluene in Water with GC-FID A laboratory experiment is to measure Henrys Law coefficient (that is, solubility) of toluene in water with a gas chromatography (GC

  17. W.E. Henry Symposium compendium: The importance of magnetism in physics and material science

    SciTech Connect

    Carwell, H.

    1997-09-19

    This compendium contains papers presented at the W. E. Henry Symposium, The Importance of Magnetism in Physics and Material Science. The one-day symposium was conducted to recognize the achievements of Dr. Warren Elliot Henry as educator, scientist, and inventor in a career spanning almost 70 years. Dr. Henry, who is 88 years old, attended the symposium. Nobel Laureate, Dr. Glenn Seaborg, a friend and colleague for over 40 years, attended the event and shared his personal reminiscences. Dr. Seaborg is Associate Director-At-Large at the Lawrence Berkeley National Laboratory. The Compendium begins with three papers which demonstrate the ongoing importance of magnetism in physics and material science. Other contributions cover the highlights of Dr. Henry`s career as a researcher, educator, and inventor. Colleagues and former students share insights on the impact of Dr. Henry`s research in the field of magnetism, low temperature physics, and solid state physics; his influence on students as an educator; and his character, intellect and ingenuity, and passion for learning and teaching. They share a glimpse of the environment and times that molded him as a man, and the circumstances under which he made his great achievements despite the many challenges he faced.

  18. Spin-dependent transport in a nanopillar non-local spin valve J.-B. Laloe a,, T. Yang a

    E-print Network

    Otani, Yoshichika

    Spin-dependent transport in a nanopillar non-local spin valve J.-B. Lalo¨e a,Ã, T. Yang a , T: Lateral spin-valve Spin current a b s t r a c t We investigate the injection of a pure spin current into a non-magnetic Cu wire in a lateral spin valve. We detect the spin accumulation occurring

  19. Effects of psoralen from Psoralea corylifolia on quinone reductase, ornithine decarboxylase, and JB6 cells transformation promotion

    Microsoft Academic Search

    Sung-Jin Lee; Kung-Woo Nam; Woongchon Mar

    2011-01-01

    The cancer chemopreventive effect of psoralen isolated from the seeds of Psoralea corylifolia was investigated in the induction of quinone reductase (QR) activity, intracellular detoxification enzyme, inhibition of\\u000a 12-O-tetradecanoylphorbol 13-acetate (TPA)-induced ornithine decarboxylase (ODC) activity, a key regulatory enzyme for polyamine\\u000a metabolism, and tumor promotion in mouse epidermal JB6 cells, sensitive to tumor promoters (clone 415a P+ cells), which are

  20. Collapse to Black Holes in Brans-Dicke Theory: II. Comparison with General Relativity

    E-print Network

    Mark A. Scheel; Stuart L. Shapiro; Saul A. Teukolsky

    1994-11-10

    We discuss a number of long-standing theoretical questions about collapse to black holes in the Brans-Dicke theory of gravitation. Using a new numerical code, we show that Oppenheimer-Snyder collapse in this theory produces black holes that are identical to those of general relativity in final equilibrium, but are quite different from those of general relativity during dynamical evolution. We find that there are epochs during which the apparent horizon of such a black hole passes {\\it outside\\/} the event horizon, and that the surface area of the event horizon {\\it decreases\\/} with time. This behavior is possible because theorems which prove otherwise assume $R_{ab}l^al^b \\ge 0$ for all null vectors $l^a$. We show that dynamical spacetimes in Brans-Dicke theory can violate this inequality, even in vacuum, for any value of $\\omega$.

  1. Collapse to Black Holes in Brans-Dicke Theory: I. Horizon Boundary Conditions for Dynamical Spacetimes

    E-print Network

    Mark A. Scheel; Stuart L. Shapiro; Saul A. Teukolsky

    1994-11-10

    We present a new numerical code that evolves a spherically symmetric configuration of collisionless matter in the Brans-Dicke theory of gravitation. In this theory the spacetime is dynamical even in spherical symmetry, where it can contain gravitational radiation. Our code is capable of accurately tracking collapse to a black hole in a dynamical spacetime arbitrarily far into the future, without encountering either coordinate pathologies or spacetime singularities. This is accomplished by truncating the spacetime at a spherical surface inside the apparent horizon, and subsequently solving the evolution and constraint equations only in the exterior region. We use our code to address a number of long-standing theoretical questions about collapse to black holes in Brans-Dicke theory.

  2. Functional integral approach to a full Dicke model with nearest-neighbour interaction

    NASA Astrophysics Data System (ADS)

    Inoue, Jun-ichi

    2012-08-01

    We discuss a possible phase transition in a full Dicke model that allows a local excitation in a two-level system to migrate to the nearest-neighbour sites. This model is found to be singular in the sense that a conventional scheme to handle a Dicke model with a generic interaction is not applicable. We thus begin with devising an appropriate method for the present model, and then evaluate a partition function associated with the model within a framework of imaginary time functional integral method. Through the stationary phase analysis of the partition function, we show that a condensation of a coupling mode of two degrees of freedom that constitute the model, photon and the local excitation, would occur. The result demonstrates contrasting features of the phase, depending on the sign of the migration term. A connection of our findings with an experimental realization, Frenkel exciton polariton condensation in an organic dye aggregate, is pointed out.

  3. Stellar explosion in the weak field approximation of the Brans-Dicke theory

    E-print Network

    Victor H. Hamity; Daniel E. Barraco

    2005-08-11

    We treat a very crude model of an exploding star, in the weak field approximation of the Brans-Dicke theory, in a scenario that resembles some characteristics data of a Type Ia Supernova. The most noticeable feature, in the electromagnetic component, is the relationship between the absolute magnitude at maximum brightness of the star and the decline rate in one magnitude from that maximum. This characteristic has become one of the most accurate method to measure luminosity distances to objects at cosmological distances. An interesting result is that the active mass associated with the scalar field is totally radiated to infinity, representing a mass loss in the ratio of the "tensor" component to the scalar component of 1 to $(2 \\omega + 3)$ ($\\omega$ is the Brans-Dicke parameter), in agreement with a general result of Hawking. Then, this model shows explicitly, in a dynamical case, the mechanism of radiation of scalar field, which is necessary to understand the Hawking result.

  4. Dissipative Dicke model with non-linear atom-photon interaction

    E-print Network

    A L Grimsmo; A S Parkins

    2013-05-01

    We study a generalized Dicke model, as recently realized in an atomic quantum gas experiment, describing the collective interaction of N two-level atoms with a single cavity mode. The model takes account of dissipation of the cavity field, and includes a non-linear atom-photon coupling, not present in the conventional Dicke model. We extend previous theoretical investigations of a semiclassical model by including all quantum effects and considering finite atom number N . Our results show good agreement between quantum expectation values and the semiclassical model as N is increased, but also show exotic behaviour for the corresponding quantum state as the non-linear atom-photon coupling is varied.

  5. Integrability versus exact solvability in the quantum Rabi and Dicke models

    NASA Astrophysics Data System (ADS)

    Batchelor, Murray T.; Zhou, Huan-Qiang

    2015-05-01

    The Rabi model describes the simplest interaction between light and matter via a two-level quantum system interacting with a bosonic field. We demonstrate that the fully quantized version of the Rabi model is integrable in the Yang-Baxter sense at two parameter values. The model is argued to be not Yang-Baxter integrable in general. This is in contrast to the claim that the quantum Rabi model is integrable based on a phenomenological criterion of quantum integrability not presupposing the existence of a set of commuting operators. Similar Yang-Baxter integrable points are identified for the generalized Rabi model and the fully quantized Dicke model. The integrable points have particular implications for the level statistics of the Dicke model.

  6. Keldysh approach for nonequilibrium phase transitions in quantum optics: Beyond the Dicke model in optical cavities

    NASA Astrophysics Data System (ADS)

    Torre, Emanuele G. Dalla; Diehl, Sebastian; Lukin, Mikhail D.; Sachdev, Subir; Strack, Philipp

    2013-02-01

    We investigate nonequilibrium phase transitions for driven atomic ensembles interacting with a cavity mode and coupled to a Markovian dissipative bath. In the thermodynamic limit and at low frequencies, we show that the distribution function of the photonic mode is thermal, with an effective temperature set by the atom-photon interaction strength. This behavior characterizes the static and dynamic critical exponents of the associated superradiance transition. Motivated by these considerations, we develop a general Keldysh path-integral approach that allows us to study physically relevant nonlinearities beyond the idealized Dicke model. Using standard diagrammatic techniques, we take into account the leading-order corrections due to the finite number N of atoms. For finite N, the photon mode behaves as a damped classical nonlinear oscillator at finite temperature. For the atoms, we propose a Dicke action that can be solved for any N and correctly captures the atoms’ depolarization due to dissipative dephasing.

  7. Observation of Dicke superradiance for two artificial atoms in a cavity with high decay rate.

    PubMed

    Mlynek, J A; Abdumalikov, A A; Eichler, C; Wallraff, A

    2014-01-01

    An individual excited two-level system decays to its ground state in a process known as spontaneous emission. The probability of detecting the emitted photon decreases exponentially with the time passed since its excitation. In 1954, Dicke first considered the more subtle situation in which two emitters decay in close proximity to each other. He argued that the emission dynamics of a single two-level system is altered by the presence of a second one, even if it is in its ground state. Here, we present a close to ideal realization of Dicke's original two-spin Gedankenexperiment, using a system of two individually controllable superconducting qubits weakly coupled to a fast decaying microwave cavity. The two-emitter case of superradiance is explicitly demonstrated both in time-resolved measurements of the emitted power and by fully reconstructing the density matrix of the emitted field in the photon number basis. PMID:25366061

  8. Quantum phase transitions of light in the Dicke-Bose-Hubbard model

    NASA Astrophysics Data System (ADS)

    Lei, Soi-Chan; Lee, Ray-Kuang

    2008-03-01

    We extend the idea of quantum phase transitions of light in an atom-photon system with a Dicke-Bose-Hubbard model for an arbitrary number of two-level atoms. The formulations of eigenenergies, effective Rabi frequencies, and critical chemical potentials for two atoms are derived. With a self-consistent method, we obtain a complete phase diagram for two two-level atoms on resonance, which indicates the transition from Mott insulator to superfluidity and with a mean excitations diagram for confirmation. We illustrate the generality of the method by constructing the dressed-state basis for an arbitrary number of two-level atoms. In addition, we show that the Mott insulator lobes in the phase diagrams will smash out with the increase of atom numbers. The results of this work provide a step for studying the effects with combinations of Dicke-like and Hubbard-like models to simulate strongly correlated electron systems using photons.

  9. Higher Dimensional Szekeres' Space-time in Brans-Dicke Scalar Tensor Theory

    E-print Network

    Asit Banerjee; Ujjal Debnath; Subenoy Chakraborty

    2004-04-21

    The generalized Szekeres family of solution for quasi-spherical space-time of higher dimensions are obtained in the scalar tensor theory of gravitation. Brans-Dicke field equations expressed in Dicke's revised units are exhaustively solved for all the subfamilies of the said family. A particular group of solutions may also be interpreted as due to the presence of the so-called C-field of Hoyle and Narlikar and for a chosen sign of the coupling parameter. The models show either expansion from a big bang type of singularity or a collapse with the turning point at a lower bound. There is one particular case which starts from the big bang, reaches a maximum and collapses with the in course of time to a crunch.

  10. Generation of Symmetric Dicke States of Remote Qubits with Linear Optics

    SciTech Connect

    Thiel, C.; Zanthier, J. von [Institut fuer Optik, Information und Photonik, Max-Planck Forschungsgruppe, Universitaet Erlangen-Nuernberg, 91058 Erlangen (Germany); Bastin, T. [Institut de Physique Nucleaire, Atomique et de Spectroscopie, Universite de Liege, 4000 Liege (Belgium); Solano, E. [Physics Department, ASC, and CeNS, Ludwig-Maximilians-Universitaet, Theresienstrasse 37, 80333 Munich (Germany); Seccion Fisica, Departamento de Ciencias, Pontificia Universidad Catolica del Peru, Apartado Postal 1761, Lima (Peru); Agarwal, G. S. [Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078-3072 (United States)

    2007-11-09

    We propose a method for generating all symmetric Dicke states, either in the long-lived internal levels of N massive particles or in the polarization degrees of freedom of photonic qubits, using linear optical tools only. By means of a suitable multiphoton detection technique, erasing Welcher-Weg information, our proposed scheme allows the generation and measurement of an important class of entangled multiqubit states.

  11. Dicke model and environment-induced entanglement in ion-cavity QED

    E-print Network

    K. Harkonen; F. Plastina; S. Maniscalco

    2009-10-16

    We investigate realistic experimental conditions under which the collective Dicke model can be implemented in ion-cavity QED context. We show how ideal subradiance and superradiance can be observed and we propose an experiment to generate entanglement exploiting the existence of the subradiant state. We explore the conditions to achieve optimal entanglement generation and we show that they are reachable with current experimental technology.

  12. Role of Chameleon Field in presence of Variable Modified Chaplygin gas in Brans-Dicke Theory

    E-print Network

    Shuvendu Chakraborty; Ujjal Debnath

    2011-08-23

    In this work, we have considered FRW model of the universe for Brans-Dicke (BD) theory with BD scalar field as a Chameleon field. First we have transformed the field equations and conservation equation from Jordan's frame to Einstein's frame. We have shown in presence of variable modified Chaplygin gas, the potential function $V$ and another analytic function $f$ always increase with respect to BD-Chameleon scalar field $\\phi$.

  13. Five dimensional FRW bulk viscous cosmological models in Brans-Dicke theory of gravitation

    NASA Astrophysics Data System (ADS)

    Ramprasad, T.; Naidu, R. L.; Ramana, K. V.

    2015-06-01

    Five dimensional FRW space-time is considered in the presence of bulk viscous fluid in the frame work of Brans and Dicke (Phys. Rev. 124:925, 1961) scalar-tensor theory of gravitation. To obtain determinate solution of the field equations we have used a power law between scalar field and the scale factor of the universe. Radiating flat, closed and open models are also presented. Physical properties of the models are also discussed.

  14. Anisotropic Dark Energy Bianchi Type III Cosmological Models in Brans Dicke Theory of Gravity

    E-print Network

    M. Farasat Shamir; Akhlaq Ahmad Bhatti

    2012-06-02

    The main purpose of this paper is to explore the solutions of Bianchi type $III$ cosmological model in Brans Dicke theory of gravity in the background of anisotropic dark energy. We use the assumption of constant deceleration parameter and power law relation between scalar field $\\phi$ and scale factor $a$ to find the solutions. The physical behavior of the solutions has been discussed using some physical quantities.

  15. Viscous cosmological models with particle creation in Brans-Dicke theory

    Microsoft Academic Search

    G. P. Singh; R. V. Deshpande; T. Singh

    2002-01-01

    The effect of bulk viscosity on the evolution of the spatially flat Friedmann-Robertson-Walker models in the context of open\\u000a thermodynamical systems, which allow particle creation, is analyzed within the framework of Brans-Dicke theory. Particle creation\\u000a and bulk viscosity have been considered as separated irreversible processes. To accommodate the viscous pressure and creation\\u000a pressure, which is associated with creation of matter

  16. Gravity in Brans-Dicke theory with Born-Infeld scalar field and the Pioneer anomaly

    E-print Network

    Mikhail N. Smolyakov

    2009-12-13

    In this paper we discuss a model which can be considered as a generalization of the well-known scalar-tensor Brans-Dicke theory. This model possesses an interesting feature: due to Born-Infeld type non-linearity of the scalar field the properties of the interaction between two test bodies depend significantly on their masses. It is shown that the model can be interesting in view of the Pioneer 10, 11 spacecraft anomaly.

  17. Non-equilibrium dynamics of the Dicke model for mesoscopic aggregates: signatures of superradiance

    E-print Network

    Sebastian Fuchs; Joachim Ankerhold; Miles Blencowe; Björn Kubala

    2015-01-30

    In the dissipative quantum dynamics of a mesoscopic aggregate of excited two level systems (atoms) coupled to a single resonance mode of a cavity, two physical phenomena associated with superradiance appear. A pronounced emission peak on short time scales is related to the known superradiant burst of excited atoms cooperatively radiating into free space. It is followed by relaxation to a stationary state of the composite system such that for sufficiently large atom-field coupling a strongly correlated state emerges. The crossover to this state can be interpreted as the precursor of the transition from normal to superradiant phase in the thermodynamic limit of the Dicke Hamiltonian. Motivated by recent experimental activities, these features are investigated in detail for a mesoscopic number of atoms and a cavity embedded in a dissipative medium described by a damped Dicke model. We identify observables and characteristics of the quantum dynamics on shorter time scales which allow to clearly distinguish weakly correlated from strongly correlated Dicke physics.

  18. The Chameleon Effect in the Jordan Frame of the Brans--Dicke Theory

    E-print Network

    Israel Quiros; Ricardo García-Salcedo; Tame Gonzalez; F. Antonio Horta-Rangel

    2015-06-20

    In this paper we investigate the chameleon effect in the different conformal frames of the Brans--Dicke theory. Given that, in the standard literature on the subject, the chameleon is described in the Einstein frame almost exclusively, here we pay special attention to the description of this effect in the Jordan and in the string frames. It is shown that, in general, terrestrial and solar system bounds on the mass of the BD scalar field, and bounds of cosmological origin, are difficult to reconcile at once through a single chameleon potential. We point out that, in a cosmological context, provided that the effective chameleon potential has a minimum within a region of constant density of matter, the Brans--Dicke theory transmutes into general relativity with a cosmological constant, in that region. This result, however, can be only locally valid. In cosmological settings de Sitter--general relativity is a global attractor of the Brans--Dicke theory only for the quadratic potential $V(\\phi)=M^2\\phi^2$, or for potentials that asymptote to $M^2\\phi^2$.

  19. The Chameleon Effect in the Jordan Frame of the Brans--Dicke Theory

    E-print Network

    Quiros, Israel; Gonzalez, Tame; Horta-Rangel, F Antonio

    2015-01-01

    In this paper we investigate the chameleon effect in the different conformal frames of the Brans--Dicke theory. Given that, in the standard literature on the subject, the chameleon is described in the Einstein frame almost exclusively, here we pay special attention to the description of this effect in the Jordan and in the string frames. It is shown that, in general, terrestrial and solar system bounds on the mass of the BD scalar field, and bounds of cosmological origin, are difficult to reconcile at once through a single chameleon potential. We point out that, in a cosmological context, provided that the effective chameleon potential has a minimum within a region of constant density of matter, the Brans--Dicke theory transmutes into general relativity with a cosmological constant, in that region. This result, however, can be only locally valid. In cosmological settings de Sitter--general relativity is a global attractor of the Brans--Dicke theory only for the quadratic potential $V(\\phi)=M^2\\phi^2$, or for ...

  20. A Look at the Abandoned Contributions to Cosmology of Dirac, Sciama and Dicke

    E-print Network

    Alexander Unzicker

    2008-12-16

    The separate contributions to cosmology of the above researchers are revisited and a cosmology encompassing their basic ideas is proposed. We study Dirac's article on the large number hypothesis (1938), Sciama's proposal of realizing Mach's principle (1953), and Dicke's considerations (1957) on a flat-space representation of general relativity with a variable speed of light (VSL). Dicke's tentative theory can be formulated in a way which is compatible with Sciama's hypothesis on the gravitational constant G. Additionally, such a cosmological model is shown to satisfy Dirac's second `large number' hypothesis on the total number of particles in the universe being proportional to the square of the epoch. In the same context, Dirac's first hypothesis on an epoch-dependent G-contrary to his prediction- does not necessarily produce a visible time dependence of G. While Dicke's proposalreproduces the classical tests of GR in first approximation, the cosmological redshift is described by a shortening of measuring rods rather than an expansion of space. Since the temporal evolution of the horizon R is governed by \\dot R(t) =c(t), the flatness and horizon problems do not arise in the common form.

  1. Collective effects in the collapse-revival phenomenon and squeezing in the Dicke model

    E-print Network

    G. Ramon; C. Brif; A. Mann

    1998-09-17

    Resonant interaction of a collection of two-level atoms with a single-mode coherent cavity field is considered in the framework of the Dicke model. We focus on the role of collective atomic effects in the phenomenon of collapses and revivals of the Rabi oscillations. It is shown that the behavior of the system strongly depends on the initial atomic state. In the case of the initial half-excited Dicke state we account for a number of interesting phenomena. The correlations between the atoms result in a suppression of the revival amplitude, and the revival time is halved, compared to the uncorrelated fully-excited and ground states. The phenomenon of squeezing of the radiation field in the atom-field interaction is also discussed. For the initial fully-excited and ground atomic states, the field is squeezed on the short-time scale, and squeezing can be enhanced by increasing the number of atoms. Some empirical formulas are found which describe the behavior of the system in excellent agreement with numerical results. For the half-excited Dicke state, the field can be strongly squeezed on the long-time scale in the case of two atoms. This kind of squeezing is enhanced by increasing the intensity of the initial coherent field and is of the same nature as revival-time squeezing in the Jaynes-Cummings model. The appearance of this long-time squeezing can be explained using the factorization approximation for semiclassical atomic states.

  2. Experimentally determined Henry's law constants for 17 polychlorobiphenyl congeners

    SciTech Connect

    Dunnivant, F.M.; Coates, J.T.; Elzerman, A.W. (Clemson Univ., SC (USA))

    1988-04-01

    Henry's law constants (HLCs) have been experimentally determined for 17 polychlorobiphenyl (PCB) congeners by a gas-purging technique, with results ranging from 0.3 {times} 10{sup {minus}4} to 8.97 {times} 10{sup {minus}4} atm{center dot}m{sup 3}/mol and an average value of 3.53 {times}10{sup {minus}4} atm{center dot}m{sup 3}/mol for the congeners studied. The experimental results are in good agreement with previously published values. For the entire group of congeners studied, measured HLCs were not correlated with molecular weight but did appear directly related to chlorine substitution pattern. Increasing HLCs coincided with greater degrees of ortho-chlorine substitution within a molecular weight class. This trend may be useful to relate individual HLCs to chlorine substitution patterns for the remaining PCB congeners.

  3. Scientific Biography of Henri Bénard (1874-1939)

    NASA Astrophysics Data System (ADS)

    Wesfreid, José Eduardo

    Henri Claude Bénard was born at Lieurey, a small French village in the region of Eure, in Normandy, on October 25 th , 1874. He was the only son of Felix A. Bénard (1851-1884) and Hélène M. Mangeant (1837-1901) [1-3]. His father was a small investor, who died very young. H. Bénard finished elementary school in the district of Lisieux and in Caen, nearby his birthplace, and moved to Paris to continue his studies at the Lycée Louis le Grand, one of the best high schools in France. In 1894, he succeeded in the highly competitive entrance examinations to the prestigious Ecole Normale Supérieure in Paris1. Indeed, this year, 17 students were selected from 307 candidates in the sciences section and 25 from 205 candidates in the humanities section [4].

  4. Architecture and urbanism in Henri IV's Paris : the Place Royale, Place Dauphine, and Hôpital St. Louis

    E-print Network

    Ballon, Hilary Meg

    1985-01-01

    This dissertation concerns the extensive building program which Henri IV undertook in Paris from 1600 to 1610. Focusing on the place Royale (now called the place des Vosges) , the place Dauphine, rue Dauphine, and Pont ...

  5. Determination of Henry's law constants of organics in dilute aqueous solutions

    SciTech Connect

    Hansen, K.C.; Zhou, Zhou; Yaws, C.L.; Aminabhavi, T.M. (Lamar Univ., Beaumont, TX (United States). Dept. of Chemistry)

    1993-10-01

    Accurate knowledge of Henry's law constants, H, or air/water partitioning coefficients are required to predict the behavior of organic compounds in the environment. In particular, when the compounds are relatively volatile and exhibit low solubility in water, air stripping may be a viable method for above-ground treatment. Henry's law constants of 15 volatile organic compounds in dilute aqueous solutions were measured by the procedure of equilibrium partitioning in a closed system. The method is based upon the measurement of the headspace concentration by gas chromatography. The compounds investigated included six halogenated hydrocarbons, four aromatic hydrocarbons, and five alkanes. The measurements were made at three temperatures between 25 and 45 C. The measured Henry's law constants compared well with the literature data of some liquids. The temperature dependence of Henry's law constant was also studied from the van't Hoff relation.

  6. "Art is a Hardy Plant:" : Benjamin Henry Latrobe and the cultivation of a transitional aesthetics

    E-print Network

    Chuong, Jennifer Y

    2012-01-01

    This thesis suggests that architect Benjamin Henry Latrobe's engagement with American scientific discourses gave rise to a transitional aesthetics that radically refigured his European-derived notions of art and architecture. ...

  7. Henry's Law Constant of Organic Nitriles Measured with GC-FID

    NASA Astrophysics Data System (ADS)

    Brewer, B.; Gangoda, M.; Lee, S.

    2012-12-01

    Nitriles are important atmospheric VOCs that paly key roles in the atmospheric nitrogen cycle and secondary aerosol formation. Nitriles and their oxidation products also have serious health effects and thus are important air pollutants. Henry's law constant is an important physical and chemical parameter to determine how gas phase species participate into gas-to-particle conversion and cloud formation and affect human health. Yet, measurements of Henry's law constants of nitriles are entirely lacking. We have developed a simple measurement technique to detect Henry's law constants of organic compounds using gas chromatography flame ionization detector (GC-FID) coupled with a bubble column. In this presentation, we will show Henry's law constants of a number of atmospherically relevant organic nitrile compounds and their temperature dependence.

  8. HENRY'S FORK AND SNAKE RIVER BASIN, IDAHO - WATER QUALITY REPORT, 1973

    EPA Science Inventory

    Reported problems in the Henrys Fork and Snake River Basin (17040202, 17040203, 17040201) include bacteria levels exceeding water quality standards, dissolved oxygen standards violations, and excessive algal blooms resulting in aesthetic problems and contributing to DO depression...

  9. HABS DC,WASH,515A (sheet 2 of 4) Captain Henry Saunders ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HABS DC,WASH,515A- (sheet 2 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC

  10. HABS DC,WASH,515A (sheet 3 of 4) Captain Henry Saunders ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HABS DC,WASH,515A- (sheet 3 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC

  11. HABS DC,WASH,515A (sheet 4 of 4) Captain Henry Saunders ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    HABS DC,WASH,515A- (sheet 4 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC

  12. Henry's voices: the representation of auditory verbal hallucinations in an autobiographical narrative.

    PubMed

    Demjén, Zsófia; Semino, Elena

    2015-06-01

    The book Henry's Demons (2011) recounts the events surrounding Henry Cockburn's diagnosis of schizophrenia from the alternating perspectives of Henry himself and his father Patrick. In this paper, we present a detailed linguistic analysis of Henry's first-person accounts of experiences that could be described as auditory verbal hallucinations. We first provide a typology of Henry's voices, taking into account who or what is presented as speaking, what kinds of utterances they produce and any salient stylistic features of these utterances. We then discuss the linguistically distinctive ways in which Henry represents these voices in his narrative. We focus on the use of Direct Speech as opposed to other forms of speech presentation, the use of the sensory verbs hear and feel and the use of 'non-factive' expressions such as I thought and as if. We show how different linguistic representations may suggest phenomenological differences between the experience of hallucinatory voices and the perception of voices that other people can also hear. We, therefore, propose that linguistic analysis is ideally placed to provide in-depth accounts of the phenomenology of voice hearing and point out the implications of this approach for clinical practice and mental healthcare. PMID:25505160

  13. Aqueous solubility, Henry’s law constants and air\\/water partition coefficients of n-octane and two halogenated octanes

    Microsoft Academic Search

    S. Sarraute; H. Delepine; M. F. Costa Gomes; V. Majer

    2004-01-01

    New data on the aqueous solubility of n-octane, 1-chlorooctane and 1-bromooctane are reported between 1°C and 45°C. Henry’s law constants, KH, and air\\/water partition coefficients, KAW, were calculated by associating the measured solubility values to vapor pressures taken from literature. The mole fraction aqueous solubility varies between (1.13–1.60)×10?7 for n-octane with a minimum at approximately 23°C, (3.99–5.07)×10?7 for 1-chlorooctane increasing

  14. Why Steiner-tree type algorithms work for community detection Mung Chiang Henry Lam Zhenming Liu Vincent Poor

    E-print Network

    Lam, Henry

    Why Steiner-tree type algorithms work for community detection Mung Chiang Henry Lam Zhenming Liu Vincent Poor Princeton University Boston University Princeton University Princeton University Abstract We

  15. Behaviour of Brans-Dicke parameter in generalised chameleon cosmology with Kantowski-Sachs space-time

    NASA Astrophysics Data System (ADS)

    Satish, J.; Venkateswarlu, R.

    2014-12-01

    In this paper we consider chameleonic generalized Brans-Dicke cosmology in the framework of Kantwoski-Sacks universes. We investigate the time dependence of the Brans-Dicke parameter ?( t) for an expanding Universe, and obtain an explicit dependence of ?( t) in different expansion phases of the Universe. Here we take the power law form of the scale factor. The behaviour of ?( t) is studied for matter-dominated, vacuum-energy-dominated universe, radiation-dominated and mass-less scalar-field-dominated era. It is also proposed to study the nature of the deceleration parameter.

  16. Probing the quantum phase transition in the Dicke model through mechanical vibrations

    SciTech Connect

    Santos, J. P.; Semiao, F. L.; Furuya, K. [Departamento de Fisica, Universidade Estadual de Ponta Grossa, Campus Uvaranas, 84030-900 Ponta Grossa, Parana (Brazil); Instituto de Fisica 'Gleb Wataghin', Universidade Estadual de Campinas-UNICAMP, 13083-859, Campinas, SP (Brazil)

    2010-12-15

    This paper is concerned with quantum dynamics of a system coupled to a critical reservoir. In this context, we employ the Dicke model which is known to exhibit a superradiant quantum phase transition (QPT) and we allow one of the mirrors to move under a linear restoring force. The electromagnetic field couples to the movable mirror through radiation pressure just like in typical optomechanical setups. We show that, in the thermodynamical limit, the superradiant phase induces a classical driving force on the mirror without causing decoherence.

  17. PPN parameter {gamma} and solar system constraints of massive Brans-Dicke theories

    SciTech Connect

    Perivolaropoulos, L. [Department of Physics, University of Ioannina (Greece)

    2010-02-15

    Previous solar system constraints of the Brans-Dicke (BD) parameter {omega} have either ignored the effects of the scalar field potential (mass terms) or assumed a highly massive scalar field. Here, we interpolate between the above two assumptions and derive the solar system constraints on the BD parameter {omega} for any field mass. We show that for {omega}=O(1) the solar system constraints relax for a field mass m > or approx. 20xm{sub AU}=20x10{sup -27} GeV.

  18. Big-bang nucleosynthesis in Brans-Dicke cosmology with a varying $?$ term related to WMAP

    E-print Network

    R. Nakamura; M. Hashimoto; S. Gamow; K. Arai

    2005-09-05

    We investigate the big-bang nucleosynthesis in a Brans-Dicke model with a varying $\\Lambda$ term using the Monte-Carlo method and likelihood analysis. It is found that the cosmic expansion rate differs appreciably from that of the standard model. The produced abundances of $^4$He, D, and barely Li are consistent with the observed ones within the uncertainties in nuclear reaction rates when the baryon to photon ratio $\\eta = (5.47 - 6.64)\\times 10^{-10}$, which is in agreement with the value deduced from WMAP.

  19. The Open-System Dicke-Model Quantum Phase Transition with a Sub-Ohmic Bath

    E-print Network

    Nagy, D

    2015-01-01

    We show that the critical exponent of a quantum phase transition in a damped-driven open system is determined by the spectral density function of the reservoir. We consider the open-system variant of the Dicke model, where the driven boson mode and also the large N-spin couple to independent reservoirs at zero temperature. The critical exponent, which is $1$ if there is no spin-bath coupling, decreases below 1 when the spin couples to a sub-Ohmic reservoir.

  20. Instability Analysis of Cylindrical Stellar Object in Brans-Dicke Gravity

    E-print Network

    Sharif, M

    2015-01-01

    This paper investigates instability ranges of a cylindrically symmetric collapsing stellar object in Brans-Dicke theory of gravity. For this purpose, we use perturbation approach in the modified field equations as well as dynamical equations and construct a collapse equation. The collapse equation with adiabatic index ($\\Gamma$) is used to explore the instability ranges of both isotropic as well as anisotropic fluid in Newtonian and post-Newtonian approximations. It turns out that the instability ranges depend on the dynamical variables of collapsing fluid. We conclude that the system always remains unstable for $01$ provides instability only for the special case.

  1. Large Dynamical System Analysis for Anisotropic Universe in Brans-Dicke Theory

    E-print Network

    Jhumpa Bhadra; Shuvendu Chakraborty; Ujjal Debnath

    2011-12-27

    In this work, we have studied the Brans-Dicke (BD) cosmology in anisotropic models. We present three dimensional dynamical system describing the evolution of anisotropic models containing perfect fluid and BD scalar field with self-interacting potential. The relevant equations have been transformed into the dynamical system. The critical points and the corresponding eigen values have been found in radiation, dust, dark energy, $\\Lambda$CDM and phantom phases of the universe. The natures and the stability around the critical points have also been investigated.

  2. Propagation of quantum particles in Brans-Dicke spacetime. The case of Gamma Ray Bursts

    E-print Network

    Capozziello, S

    2015-01-01

    The propagation of boson particles in a gravitational field described by the Brans-Dicke theory of gravity is analyzed. We derive the wave function of the scalar particles, and the effective potential experienced by the quantum particles considering the role of the varying gravitational coupling. Besides, we calculate the probability to find the scalar particles near the region where a naked singularity is present. The extremely high energy radiated in such a situation could account for the huge emitted power observed in Gamma Ray Bursts.

  3. Extended JC-Dicke model for a two-component atomic BEC inside a cavity

    E-print Network

    Yong Li; Peng Zhang; Z. D. Wang

    2010-02-25

    We consider a trapped two-component atomic Bose-Einstein condensate (BEC), where each atom with three energy-levels is coupled to an optical cavity field and an external classical optical field as well as a microwave field to form the so-called $\\Delta$-type configuration. After adiabatically eliminating the atomic excited state, an extended JC-Dicke model is derived under the rotating-wave approximation. The scaled ground-state energy and the phase diagram of this model Hamiltonian are investigated in the framework of mean-field approach. A new phase transition is revealed when the amplitude of microwave field changes its sign.

  4. Lemaitre-Tolman-Bondi dust cloud collapse in Brans-Dicke gravity

    NASA Astrophysics Data System (ADS)

    Sharif, Muhammad; Manzoor, Rubab

    2014-11-01

    This paper investigates the phenomenon of gravitational collapse of Lemaitre-Tolman-Bondi (LTB) model in the presence of Brans-Dicke (BD) scalar field with nonzero potential field. We find a class of solutions by taking perfect fluid as well as scalar field and check the validity of weak energy conditions. It turns out that two different types of singularities are formed in the presence of scalar field. We conclude that the end state of gravitational collapse turns out to be a black hole (BH) contrary to general relativity (GR).

  5. PPN Parameter $?$ and Solar System Constraints of Massive Brans-Dicke Theories

    E-print Network

    L. Perivolaropoulos

    2010-01-19

    Previous solar system constraints of the Brans-Dicke (BD) parameter $\\omega$ have either ignored the effects of the scalar field potential (mass terms) or assumed a highly massive scalar field. Here, we interpolate between the above two assumptions and derive the solar system constraints on the BD parameter $\\omega$ for {\\it any} field mass. We show that for $\\omega=O(1)$ the solar system constraints relax for a field mass $m \\gsim 20 \\times m_{AU}= 20\\times 10^{-27}GeV$.

  6. Images of Moby-Dick: An exhibition of editions of Herman Melville's great novel of whaling

    E-print Network

    Mason, Alexandra; Helyar, James

    1995-01-01

    with extraordinarily visual images, was not published in an illustrated edition until over 40 years after it first appeared. It was not until thirty years after this that the first edition with colored illustrations (only the third illustrated edition of any sort...) was published. In the 73 years since that first colored edition Moby-Dick has been published in a multiplicity of pictorial forms—nearly seventy illustrated editions printed in English alone—and has engaged the efforts of artists in many fields. Images...

  7. Antibacterial Activity of Pseudonocardia sp. JB05, a Rare Salty Soil Actinomycete against Staphylococcus aureus

    PubMed Central

    Jafari, Nesa; Behroozi, Reza; Farajzadeh, Davoud; Farsi, Mohammad; Akbari-Noghabi, Kambiz

    2014-01-01

    Staphylococcus aureus is a Gram-positive bacterium that causes many harmful and life-threatening diseases. Some strains of this bacterium are resistant to available antibiotics. This study was designed to evaluate the ability of indigenous actinomycetes to produce antibacterial compounds against S. aureus and characterize the structure of the resultant antibacterial compounds. Therefore, a slightly modified agar well diffusion method was used to determine the antibacterial activity of actinomycete isolates against the test microorganisms. The bacterial extracts with antibacterial activity were fractionated by silica gel and G-25 sephadex column chromatography. Also, the active fractions were analyzed by thin layer chromatography. Finally, the partial structure of the resultant antibacterial compound was characterized by Fourier transform infrared spectroscopy. One of the isolates, which had a broad spectrum and high antibacterial activity, was designated as Pseudonocardia sp. JB05, based on the results of biochemical and 16S rDNA gene sequence analysis. Minimum inhibitory concentration for this bacterium was 40?AU?mL?1 against S. aureus. The antibacterial activity of this bacterium was stable after autoclaving, 10% SDS, boiling, and proteinase K. Thin layer chromatography, using anthrone reagent, showed the presence of carbohydrates in the purified antibacterial compound. Finally, FT-IR spectrum of the active compound illustrated hydroxyl groups, hydrocarbon skeleton, and double bond of polygenic compounds in its structure. To the best of our knowledge, this is the first report describing the efficient antibacterial activity by a local strain of Pseudonocardia. The results presented in this work, although at the initial stage in bioactive product characterization, will possibly contribute toward the Pseudonocardia scale-up for the production and identification of the antibacterial compounds. PMID:25202705

  8. Solute and heat transport model of the Henry and Hilleke laboratory experiment

    USGS Publications Warehouse

    Langevin, C.D.; Dausman, A.M.; Sukop, M.C.

    2010-01-01

    SEAWAT is a coupled version of MODFLOW and MT3DMS designed to simulate variable-density ground water flow and solute transport. The most recent version of SEAWAT, called SEAWAT Version 4, includes new capabilities to represent simultaneous multispecies solute and heat transport. To test the new features in SEAWAT, the laboratory experiment of Henry and Hilleke (1972) was simulated. Henry and Hilleke used warm fresh water to recharge a large sand-filled glass tank. A cold salt water boundary was represented on one side. Adjustable heating pads were used to heat the bottom and left sides of the tank. In the laboratory experiment, Henry and Hilleke observed both salt water and fresh water flow systems separated by a narrow transition zone. After minor tuning of several input parameters with a parameter estimation program, results from the SEAWAT simulation show good agreement with the experiment. SEAWAT results suggest that heat loss to the room was more than expected by Henry and Hilleke, and that multiple thermal convection cells are the likely cause of the widened transition zone near the hot end of the tank. Other computer programs with similar capabilities may benefit from benchmark testing with the Henry and Hilleke laboratory experiment. Journal Compilation ?? 2009 National Ground Water Association.

  9. Quark-hadron phase transition in Brans-Dicke brane gravity

    E-print Network

    K. Atazadeh; A. M. Ghezelbash; H. R. Sepangi

    2011-03-01

    A standard picture in cosmology has been emerging over the past decade in which a phase transition, associated with chiral symmetry breaking after the electroweak transition, has occurred at approximately $10^{-6}$ seconds after the Big Bang to convert a plasma of free quarks and gluons into hadrons. In this paper, we consider the quark-hadron phase transition in a Brans-Dicke brane world scenario within an effective model of QCD. We study the evolution of the physical quantities relevant to quantitative description of the early universe, namely, the energy density, temperature and the scale factor before, during, and after the phase transition. We show that for different values of the Brans-Dicke coupling, $\\omega$, phase transition occurs and results in decreasing the effective temperature of the quark-gluon plasma and of the hadronic fluid. We then move on to consider the quark-hadron transition in the smooth crossover regime at high and low temperatures and show that such a transition occurs and results in decreasing the effective temperature of the quark-gluon plasma during the process of quark-hadron phase transition.

  10. Dick effect in a pulsed atomic clock using Coherent Population Trapping

    E-print Network

    Danet, Jean-Marie; Guérandel, Stéphane; de Clercq, Emeric

    2014-01-01

    The Dick effect can be a limitation of the achievable frequency stability of a passive atomic frequency standard when the ancillary frequency source is only periodically sampled. Here we analyze the Dick effect for a pulsed vapor cell clock using coherent population trapping (CPT). Due to its specific interrogation process without atomic preparation nor detection outside of the Ramsey pulses, it exhibits an original shape of the sensitivity function to phase noise of the oscillator. Numerical calculations using a three-level atom model are successfully compared with measurements; an approximate formula of the sensitivity function is given as an easy-to-use tool. A comparison of our CPT clock sensitivity to phase noise with a clock of the same duty cycle using a two-level system reveals a higher sensitivity in the CPT case. The influence of a free-evolution time variation and of a detection duration lengthening on this sensitivity is studied. Finally this study permitted to choose an adapted quartz oscillator ...

  11. Holographic dark energy in Brans-Dicke theory with log correction

    E-print Network

    Ahmad Sheykhi; Kayoomars Karami; Mubasher Jamil; E. Kazemi; M. Haddad

    2011-11-01

    In the derivation of holographic dark energy density, the area law of the black hole entropy plays a crucial role. However, the entropy-area relation can be modified from the inclusion of quantum effects, motivated from the loop quantum gravity, string theory and black hole physics. In this paper, we study cosmological implication of the interacting entropy-corrected holographic dark energy model in the framework of Brans-Dicke cosmology. We obtain the equation of state and the deceleration parameters of the entropy-corrected holographic dark energy in a non-flat Universe. As system's IR cutoff we choose the radius of the event horizon measured on the sphere of the horizon, defined as $L=ar(t)$. We find out that when the entropy-corrected holographic dark energy is combined with the Brans-Dicke field, the transition from normal state where $w_D >-1 $ to the phantom regime where $w_D <-1 $ for the equation of state of interacting dark energy can be more easily achieved for than when resort to the Einstein field equations is made.

  12. Detection of multipartite entanglement in the vicinity of symmetric Dicke states

    E-print Network

    Geza Toth

    2007-02-06

    We present methods for detecting entanglement around symmetric Dicke states. In particular, we consider N-qubit symmetric Dicke states with N/2 excitations. In the first part of the paper we show that for large N these states have the smallest overlap possible with states without genuine multi-partite entanglement. Thus these states are particulary well suited for the experimental examination of multi-partite entanglement. We present fidelity-based entanglement witness operators for detecting multipartite entanglement around these states. In the second part of the paper we consider entanglement criteria, somewhat similar to the spin squeezing criterion, based on the moments or variances of the collective spin operators. Surprisingly, these criteria are based on an upper bound for variances for separable states. We present both criteria detecting entanglement in general and criteria detecting only genuine multi-partite entanglement. The collective operator measured for our criteria is an important physical quantity: Its expectation value essentially gives the intensity of the radiation when a coherent atomic cloud emits light.

  13. Dark matter an effect of gravitation permeability of material in Jordan, Brance - Dicke theory

    E-print Network

    V. I. Bashkov; S. M. Kozyrev

    2001-03-03

    Analyzing the static spherically symmetric and rotating ellipsoid solutions in the Newtonian limit of Jordan, Brance - Dicke theory we find the following. In empty space scalar-tensor theories have trivial solution of field equation with constant scalar potential (efficient value of gravitation constant). In this case no celestial-mechanical experiments to reveal a difference between scalar-tensor theories and Einstein theory is not presented possible. However, scalar field, inside the matter, has characteristics like gravitation permeability of material similar electromagnetic permeability of material in Maxwell theories of electromagnetism. Investigation of obtained exact solutions for given functions of a matter distributions in the Newtonian limit of Jordan, Brance - Dicke theory show the efficient value of gravitation constant depends on density of matter, sizes and form of object, as well as on the value of theories coupling constant. That for example led to weakening gravitation force in the central regions of a Galaxies. This assumption constitutes the way to explain observed rotation curves of Galaxies without using cold dark matter.

  14. Comparison of Turbine Discharge Measured by Current Meters and Acoustic Scintillation Flow Meter at Fort Patrick Henry Power Plant

    Microsoft Academic Search

    David D. Lemon; Charles W. Almquist; Ward W. Cartier; Patrick A. March; Thomas A. Brice

    Performance tests were conducted on Unit 1 at the Tennessee Valley Authority's Fort Patrick Henry Plant on September 24 - 25, 1997. These tests included measurements of the discharge through the turbine using current meters and the Acoustic Scintillation Flowmeter (ASFM). Fort Patrick Henry is a low-head, short intake plant typical of the type for which current meters have been

  15. Alina Hang, Daniel Buschek, Alexander De Luca, Axel Hsl, Sebastian Lhmann, Henri Palleis, Simon Stusak, Sarah Tausch,

    E-print Network

    Alina Hang, Daniel Buschek, Alexander De Luca, Axel Hösl, Sebastian Löhmann, Henri Palleis, Simon Hang, Daniel Buschek, Alexander De Luca, Axel H¨osl, Sebastian L¨ohmann, Henri Palleis, Simon Stusak-5207 University of Munich Department of Computer Science Media Informatics Group #12;Alina Hang, Daniel Buschek

  16. Optimizing Peer Relationships in a Super-Peer Network Pawel Garbacki and Dick H.J. Epema

    E-print Network

    Kuzmanov, Georgi

    steen@cs.vu.nl Abstract Super-peer architectures exploit the heterogeneity of nodes in a P2P network with node failures. In this paper we introduce a self-organizing super-peer net- work architecture (SOSPNETOptimizing Peer Relationships in a Super-Peer Network Pawel Garbacki and Dick H.J. Epema Delft

  17. Constraints on Brans-Dicke cosmology with a varying {lambda} term due to the big-bang nucleosynthesis and WMAP

    SciTech Connect

    Nakamura, Riou; Hashimoto, Masa-aki [Department of Physics, Kyushu University, Fukuoka 810-8560 (Japan); Arai, Kenzo [Department of Physics, Kumamoto University, Kumamoto 860-8555 (Japan)

    2006-07-12

    We investigate the big-bang nucleosynthesis (BBN) in a Brans-Dicke model with a varying {lambda} term. We find that the cosmic expansion rate differs appreciably from that of the Friedmann model during the BBN epoch . The produced abundances of 4He, D, and 7Li are consistent with both the observed ones and the baryon density obtained from WMAP.

  18. Generation of Multi-atom Dicke States with Quasi-unit Probability through the Detection of Cavity Decay

    E-print Network

    Yun-Feng Xiao; Zheng-Fu Han; Jie Gao; Guang-Can Guo

    2004-12-30

    We propose a scheme to create universal Dicke states of n largely detuned atoms through detecting the leaky photons from an optical cavity. The generation of entangled states in our scheme has quasi-unit success probability, so it has potential practicability based on current or near coming laboratory cavity QED technology.

  19. Large-N scaling behavior of the ground-state energy and fidelity in the Dicke Model

    E-print Network

    Tao Liu; Yu-Yu Zhang; Qing-Hu Chen; Ke-Lin Wang

    2009-08-16

    Within the numerically exact solution to the Dicke model proposed previously, we study the quantum criticality in terms of the ground-state (GS) energy, fidelity, and the order parameter. The finite size scaling analysis for the average fidelity susceptibility (FS) and second derivative of GS energy are performed. The correlation length exponent is obtained to be $\

  20. Dick Ran, Dan Ran, and so Did the Gingerbread Man: A Quick Survey of 20th Century Reading Instruction.

    ERIC Educational Resources Information Center

    Savage, John

    1997-01-01

    Looks briefly at reading instruction throughout the 20th century, noting how it has moved from the alphabetic method, to the sight method of Dick and Jane, back to decoding, then to the extensive use of literature in whole-language programs, swinging back toward more skills instruction. Hopes that the millennium will allow the development of…

  1. Three-dimensional pin-to-pin analyses of VVER-440 cores by the MOBY-DICK code

    SciTech Connect

    Lehmann, M.; Mikolas, P.

    1994-12-31

    Nuclear design for the Dukovany (EDU) VVER-440s nuclear power plant is routinely performed by the MOBY-DICK system. After its implementation on Hewlett Packard series 700 workstations, it is able to perform routinely three-dimensional pin-to-pin core analyses. For purposes of code validation, the benchmark prepared from EDU operational data was solved.

  2. An efficient single-step scheme for manipulating quantum information of two trapped ions beyond the Lamb-Dicke limit

    E-print Network

    L. F. Wei; Franco Nori

    2005-12-19

    Based on the exact conditional quantum dynamics for a two-ion system, we propose an efficient {\\it single-step} scheme for coherently manipulating quantum information of two trapped cold ions by using a pair of synchronous laser pulses. Neither the auxiliary atomic level nor the Lamb-Dicke approximation are needed.

  3. The Dick, Ruth and Judy Bell Lecture -Carleton University, Ottawa October 24, 1996 "Cockroaches and Conservatives" by Dalton Camp

    E-print Network

    The Dick, Ruth and Judy Bell Lecture - Carleton University, Ottawa October 24, 1996 "Cockroaches and Conservatives" by Dalton Camp COCKROACHES AND CONSERVATIVES Thank you very much. Good evening. It is good of you is the title of your address, I said "Cockroaches and Conservatives" and I could hear someone deeply sigh

  4. Designting CMOS Circuits for Dick L. Liu * andEdwardJ. McCluskeyjl Stanford Un1iversity

    E-print Network

    Stanford University

    Designting CMOS Circuits for "I Dick L. Liu * andEdwardJ. McCluskeyjl Stanford Un1iversity can potentially be invalidated by stray circuit delays.2" The algorithm to generate valid robust two- ator may require an order of magnitude more CPU time to generate tests than a gate-level, stuck

  5. Calculations of Henry's law constants for adsorption of aromatic hydrocarbons on a graphitic carbon surface

    SciTech Connect

    McConnell, C.L.; Rybolt, T.R. (Univ. of Tennessee, Chattanooga, TN (United States))

    1994-01-01

    Correlations were developed and used to calculate energetic and structural parameters which, in turn, were used to calculate Henry's law constants for the adsorption of a series of aromatic hydrocarbons on a graphitic carbon surface. The adsorption energetic parameter was correlated with a ratio involving the critical temperature divided by the square root of the critical pressure of the adsorbate molecule. The structural parameter was correlated with the cross-sectional molecular area obtained from available molecular modeling software, CAChe. Calculations of Henry's law constants per unit surface area were compared to available experimental values for 17 aromatic hydrocarbons divided into groups of mono-substituted benzene and methyl-substituted benzene. This approach could be used to predict the extent adsorption in the Henry's law region using only adsorbate molecular properties where correlations have been established for a series of molecules of similar structure. 11 refs., 3 figs., 4 tabs.

  6. 220 NAW 5/13 nr. 3 september 2012 New books about Henri Poincare Jean-Marc Ginoux, Ferdinand Verhulst, Jeremy Gray Jean-Marc Ginoux

    E-print Network

    Verhulst, Ferdinand

    1 1 220 NAW 5/13 nr. 3 september 2012 New books about Henri Poincar´e Jean-Marc Ginoux, Ferdinand descriptions New books about Henri Poincar´e In the `centennial year' 2012 there will appear three books on life and work of Henri Poincar´e. Each of the respective authors Jean-Marc Ginoux, Ferdinand Verhulst

  7. DIFFUSION ELASTIQUE D'ELECTRONS SUR LE ZIRCONIUM-90 ET LE MOLYBDENE-92 Phan Xuan Ho, J.B. Bellicard, A. Bussire, Ph. Leconte et M. Priou

    E-print Network

    Paris-Sud XI, Université de

    DIFFUSION ELASTIQUE D'ELECTRONS SUR LE ZIRCONIUM-90 ET LE MOLYBDENE-92 Phan Xuan Ho, J.B. Bellicard-sur-Yvette, France. Rés&.- La diffusion élastique d'électrons sur le zirconium-90 et le molybdène-92 a été mesurée gaussien parabolique comme distribution de charge. Pour le zirconium- 90, nous comparons ce modèle aux

  8. A STUDY OF ICE ACCUMULATION AND STABILITY IN MARTIAN CRATERS UNDER PAST ORBITAL CONDITIONS USING THE LMD MESOSCALE MODEL. J.-B. Madeleine1

    E-print Network

    Madeleine, Jean-Baptiste

    THE LMD MESOSCALE MODEL. J.-B. Madeleine1 , J. W. Head1 , A. Spiga2 , J. L. Dickson1 and F. Forget2 , 1 formed, using geolog- ical observations [e.g., 1-4] and mesoscale climate simulations [5 provide essential constraints on the mesoscale climate which prevailed during their formation

  9. http://www.sedimentaryores.net/Cascades/MtStHelens/Cascade%20Range%20Lahars.pdf Cascade Range Lahars (Volcanic Debris Flows) JB Maynard 2010

    E-print Network

    Maynard, J. Barry

    Lahars (Volcanic Debris Flows) JB Maynard 2010 The most devastating product of a volcanic eruption is a lahar, from an Indonesian word for mudflow. During an eruption much of the snow and ice on the volcano peak may melt to produce a sediment-laden slurry that moves rapidly downhill, sweeping away everything

  10. Journal of Safety Research, vol 50, septembre 2014, pp 27-37 Auteurs : A.Domnes, V.Cavallo, JB. Dubuisson, I.Tournier, F.Vienne

    E-print Network

    Boyer, Edmond

    have investigated age-specific difficulties. Method: A total of 18 young (age 19­35), 28 younger1 Journal of Safety Research, vol 50, septembre 2014, pp 27-37 Auteurs : A.Domnes, V.Cavallo, JB. Dubuisson, I.Tournier, F.Vienne Crossing a two-way street: comparison of young and old pedestrians Abstract

  11. Time Irreversibility of Cycle-by-Cycle Engine Combustion Variations J.B. Green, Jr., C.S. Daw, J.S. Armfield

    E-print Network

    Tennessee, University of

    Time Irreversibility of Cycle-by-Cycle Engine Combustion Variations J.B. Green, Jr., C.S. Daw, J-ignition engines exhibit patterns of increasing in- stability as engine fueling goes from stoichiometric to lean. The observation of time irreversibility in cycle- resolved combustion measurements indicates that this combustion

  12. JOURNAL OF BACTERIOLOGY, Apr. 2006, p. 27922800 Vol. 188, No. 8 0021-9193/06/$08.00 0 doi:10.1128/JB.188.8.27922800.2006

    E-print Network

    Lovley, Derek

    in Geobacter sulfurreducens by using a combination of DNA microarray expression profiles and proteomics. An rpo.1128/JB.188.8.2792­2800.2006 Copyright © 2006, American Society for Microbiology. All Rights Reserved. DNA as an electron acceptor and with additional transcriptional profiling using Fe(III) as an electron acceptor

  13. Economics and feasibility of co-composting solid waste in McHenry County. Final report

    SciTech Connect

    Alpert, J.

    1987-07-01

    The purpose of the study was to evaluate the feasibility of composting various segments of the waste stream produced in McHenry County, IL. In particular, the study emphasized co-composting of municipal solid waste (MSW) with septage, co-composting of MSW with septage and sludge, leaf- and yard-waste composting, and composting various animal wastes. In addition to specific analysis of co-composting in McHenry, the report includes chapters on the technical description and implementation of composting, environmental considerations of co-composting, comparisons of different proprietary systems, the economics of composting, and an analysis of compost markets.

  14. A review of "Henry Vaughan’s Silex Scintillans: Scripture Uses." by Philip West 

    E-print Network

    Alan Rudrum

    2003-01-01

    REVIEWS 189 Philip West. Henry Vaughan?s Silex Scintillans: Scripture Uses. Oxford: Oxford University Press, 2001. xii + 271 pp. $70.00. Review by ALAN RUDRUM, SIMON FRASER UNIVERSITY. Henry Vaughan?s verse is saturated in biblical reference... Difficulty? Two British dissertations to my knowledge were never completed, and probably others elsewhere. Philip West?s book is then to be wel- comed; it appears at a good moment for Vaughan studies, stimu- lated as they have been in the past few years...

  15. Gravitational Collapse In Husain Space-time For Brans-Dicke Gravity Theory with Power-law Potential

    E-print Network

    Prabir Rudra; Ritabrata Biswas; Ujjal Debnath

    2014-08-18

    The motive of this work is to study gravitational collapse in Husain space-time in Brans-Dicke gravity theory. Among many scalar-tensor theories of gravity, Brans-Dicke is the simplest and the impact of it can be regulated by two parameters associated with it, namely, the Brans-Dicke parameter, $\\omega$, and the potential-scalar field dependency parameter $n$ respectively. V. Husain's work on exact solution for null fluid collapse in 1996 has influenced many authors to follow his way to find the end-state of the homogeneous/in-homogeneous dust cloud. Vaidya's metric is used all over to follow the nature of future outgoing radial null geodesics. Detecting whether the central singularity is naked or wrapped by an event horizon, by the existence of future directed radial null geodesic emitted in past from the singularity is the basic objective. To point out the existence of positive trajectory tangent solution, both particular parametric cases(through tabular forms) and wide range contouring process have been applied. Precisely, perfect fluid's EoS satisfies a wide range of phenomena : from dust to exotic fluid like dark energy. We have used the EoS parameter $k$ to determine the end state of collapse in different cosmological era. Our main target is to check low $\\omega$ (more deviations from Einstein gravity-more Brans Dicke effect) and negative $k$ zones. This particularly throws light on the nature of the end-state of collapse in accelerated expansion in Brans Dicke gravity. It is seen that for positive values of EoS parameter $k$, the collapse results in a black hole, whereas for negative values of $k$, naked singularity is the only outcome. It is also to be noted that "low $\\omega$" leads to the possibility of getting more naked singularities even for a non-accelerating universe.

  16. Stability analysis of agegraphic dark energy in Brans-Dicke cosmology

    NASA Astrophysics Data System (ADS)

    Farajollahi, H.; Sadeghi, J.; Pourali, M.; Salehi, A.

    2012-05-01

    Stability analysis of agegraphic dark energy in Brans-Dicke theory is presented in this paper. We constrain the model parameters with the observational data and thus the results become broadly consistent with those expected from experiment. Stability analysis of the model without best fitting shows that universe may begin from an unstable state passing a saddle point and finally become stable in future. However, with the best fitted model, There is no saddle intermediate state. The agegraphic dark energy in the model by itself exhibits a phantom behavior. However, contribution of cold dark matter on the effective energy density modifies the state of the universe from phantom phase to quintessence one. The statefinder diagnosis also indicates that the universe leaves an unstable state in the past, passes the LCDM state and finally approaches the sable state in future.

  17. Astrophysical constraints on primordial black holes in Brans-Dicke theory

    SciTech Connect

    Nayak, B.; Singh, L.P. [Department of Physics, Utkal University, Vanivihar, Bhubaneswar 751004 (India); Majumdar, A.S., E-mail: bibeka@iopb.res.in, E-mail: archan@bose.res.in, E-mail: lambodar_uu@yahoo.co.in [S.N. Bose National Centre for Basic Sciences, Salt Lake, Kolkata 700098 (India)

    2010-08-01

    We consider cosmological evolution in Brans-Dicke theory with a population of primordial black holes. Hawking radiation from the primordial black holes impacts various astrophysical processes during the evolution of the Universe. The accretion of radiation by the black holes in the radiation dominated era may be effective in imparting them a longer lifetime. We present a detailed study of how this affects various standard astrophysical constraints coming from the evaporation of primordial black holes. We analyze constraints arising from the present density of the Universe, the present photon spectrum, the distortion of the cosmic microwave background spectrum and also from processes affecting light element abundances after nucleosynthesis. We find that the constraints on the initial primordial black hole mass fractions are tightened with increased accretion efficiency.

  18. No singularities in observables at the phase transition in the Dicke model

    SciTech Connect

    Castanos, O.; Nahmad-Achar, E.; Lopez-Pena, R.; Hirsch, J. G. [Instituto de Ciencias Nucleares, Universidad Nacional Autonoma de Mexico, Apartado Postal 70-543, Mexico D. F., C.P. 04510 (Mexico)

    2011-05-15

    The Dicke Hamiltonian describes the simplest quantum system with atoms interacting with photons: N two-level atoms inside a perfectly reflecting cavity, which allows only one electromagnetic mode. It has also been successfully employed to describe superconducting circuits that behave as artificial atoms coupled to a resonator. The system exhibits a transition to a superradiant phase at zero temperature. When the interaction strength reaches its critical value, both the number of photons and atoms in excited states in the cavity, together with their fluctuations, exhibit a sudden increase from zero. By employing symmetry-adapted coherent states, it is shown that these properties scale with the number of atoms, their reported divergences at the critical point represent the limit when this number goes to infinity, and, in this limit, they remain divergent in the superradiant phase. Analytical expressions are presented for all observables of interest, for any number of atoms. Comparisons with exact numerical solutions strongly support the results.

  19. Interacting Ricci Logarithmic Entropy Corrected Holographic Dark Energy in Brans-Dicke Cosmology

    E-print Network

    Antonio Pasqua; Iuliia Khomenko

    2013-02-22

    In the derivation of Holographic Dark Energy (HDE), the area law of the black hole entropy assumes a crucial role. However, the entropy-area relation can be modified including some quantum effects, motivated from the Loop Quantum Gravity (LQG), string theory and black hole physics. In this paper, we study the cosmological implications of the interacting logarithmic entropy-corrected HDE (LECHDE) model in the framework of Brans-Dicke (BD) cosmology. As system's infrared (IR) cut-off, we choose the average radius of Ricci scalar curvature, i.e. $R^{-1/2}$. We obtain the Equation of State (EoS) parameter $\\omega_D$, the deceleration parameter $q$ and the evolution of energy density parameter $\\Omega'_D$ of our model in a non-flat universe. Moreover, we study the limiting cases corresponding to our model without corrections and to the Einstein's gravity.

  20. Modified Holographic Ricci Dark Energy in Chameleon Brans–Dicke Cosmology and Its Thermodynamic Consequence

    NASA Astrophysics Data System (ADS)

    Jawad, A.; Chattopadhyay, S.; Bhattacharya, S.; Pasqua, A.

    2015-04-01

    The objective of this paper is to discuss the Chameleon Brans–Dicke gravity with non-minimally matter coupling of scalar field. We take modified Holographic Ricci dark energy model in this gravity with its energy density in interaction with energy density of cold dark matter. We assume power-law ansatz for scale factor and scalar field to discuss potential as well as coupling functions in the evolving universe. These reconstructed functions are plotted versus scalar field and time for different values of power component of scale factor n. We observe that potential and coupling functions represent increasing behavior, in particular, consistent results for a specific value of n. Finally, we have examined validity of the generalized second law of thermodynamics and we have observed its validity for all values of n. The financial Supported from Department of Science and Technology, Govt. of India under Project Grant No. SR/FTP/PS-167/2011 is thankfully acknowledged by SC

  1. Constructing stabilized brane world models in five-dimensional Brans-Dicke theory

    E-print Network

    Alexey S. Mikhailov; Yuri S. Mikhailov; Mikhail N. Smolyakov; Igor P. Volobuev

    2006-11-29

    We consider brane world models, which can be constructed in the five-dimensional Brans-Dicke theory with bulk scalar field potentials suggested by the supergravity theory. For different choices of the potentials and parameters we get: (i) an unstabilized model with the Randall-Sundrum solution for the metric and constant solution for the scalar field; (ii) models with flat background and tension-full branes; (iii) stabilized brane world models, one of which reproduces the Randall-Sundrum solution for the metric and gives an exponential solution for the scalar field. We also discuss the relationship between solutions in different frames - with non-minimal and minimal coupling of the scalar field.

  2. Metric factorizability and equivalence of brane world models with Brans-Dicke theory

    E-print Network

    Chakraborty, Sumanta

    2015-01-01

    In the standard brane world models, the bulk metric ansatz is usually assumed to be factorizable in brane and bulk coordinates. However it is not self evident that it is always possible to factorize the bulk metric. Using gradient expansion scheme, which involves, expansion of bulk quantities in terms of the brane to bulk curvature ratio, as perturbative parameter, we have explicitly shown that upto second order in perturbative expansion, metric factorizability is a valid assumption. We have also argued from our result that the same should be true for all orders in the perturbation scheme. We further establish that the non-local terms present in the bulk gravitational field equation can be replaced by radion field and the effective action on the brane obtained thereof resembles Brans-Dicke theory of gravity.

  3. Brans-Dicke-Maxwell Solutions for Higher Dimensional Static Cylindrical Symmetric Spacetime

    E-print Network

    Çiftci, Dilek Kaz?c?

    2015-01-01

    In this paper, Brans-Dicke-Maxwell type vacuum solutions are considered for a static cylindrically symmetric spacetime in arbitrary dimensions. Exact solutions are obtained by directly solving the field equations for the case where an azimuthal magnetic field is present. Other configurations such as axial magnetic field case can be obtained by suitably relabelling the coordinates. We have also considered conformally related "Einstein frame" to relate the solutions we have obtained with the dilaton-Maxwell type solutions that exist in the literature. We see that for a special case the general solution we present reduces to Dilaton-Melvin spacetime. Another important implication of our work is the $\\omega \\rightarrow \\infty$ limit of the solutions we have discussed. In four dimensions where the energy-momentum tensor is traceless, the correct General Relativistic limit is obtained for the specific value of the arbitrary parameter $k$ of the solution, namely $k=1$, but not $\\omega\\rightarrow \\infty$. However, fo...

  4. Pryce-Hoyle Tensor in a Combined Einstein-Cartan-Brans-Dicke Model

    E-print Network

    Marcelo Samuel Berman

    2008-09-27

    In addition to introducing matter injection through a scalar field determined by Pryce-Hoyle tensor, we also combine it with a BCDE (Brans-Dicke-Einstein-Cartan) theory with lambdaterm developed earlier by Berman(2008), for inflationary scenario. It involves a variable cosmological constant, which decreases with time, jointly with energy density, cosmic pressure, shear, vorticity, and Hubble's parameter, while the scale factor, total spin and scalar field increase exponentially. The post-inflationary fluid resembles a perfect one, though total spin grows, but not the angular speed (Berman, 2007d). The Pryce-Hoyle tensor, which can measured by the number of injected particles per unit proper volume and time, as well as shear and vorticity, can be neglected in the aftermath of inflation ("no-hair").

  5. Brans-Dicke model constrained from Big Bang nucleosynthesis and magnitude redshift relations of Supernovae

    E-print Network

    Thushari, E P B A; Hashimoto, M; Arai, K

    2010-01-01

    The Brans-Dicke model with a variable cosmological term ($BD\\Lambda$) has been investigated with use of the coupling constant of $\\omega=10^4$. Parameters inherent in this model are constrained from comparison between Big Bang nucleosynthesis and the observed abundances. Furthermore, the magnitude redshift ($m-z$) relations are studied for $BD\\Lambda$ with and without another constant cosmological term in a flat universe. Observational data of Type Ia Supernovae are used in the redshift range of $0.01

  6. Singularities and isotropy in a Brans-Dicke Bianchi-type VII universe

    E-print Network

    H. N. Núñez-Yépez

    1998-10-02

    We study the dynamical effects in the scale factors due to the scalar $\\phi$-field at the early stages of a supposedly anisotropic Universe expansion in connection with the problem of the initial singularity in the scalar-tensor cosmology of Jordan-Brans-Dicke. This is done by considering the behaviour of the general analytical solutions for the homogeneous model of Bianchi type VII in the vacuum case. We conclude that the Bianchi-VII$_0$ model shows an isotropic expansion and that its only physical solution is equivalent to a Friedman-Robertson-Walker spacetime whose evolution begins in a singularity and ends in another; moreover, we obtain that the general Bianchi-VII$_h$ (with $h\

  7. Two fluid scenario for dark energy model in Brans-Dicke theory of gravitation

    NASA Astrophysics Data System (ADS)

    Reddy, D. R. K.; Anitha, S.; Umadevi, S.

    2014-04-01

    In this paper, we study the evolution of the dark energy parameter in the spatially homogeneous and isotropic Friedmann-Robertson-Walker (FRW) model filled with barotropic fluid and dark energy in the scalar-tensor theory of gravitation proposed by Brans and Dicke (Phys. Rev. 24:925, 1961). A determinate solution is presented using (i) the special law of variation for Hubble's parameter proposed by Berman (Nuovo Cimento B 74:183, 1983) and (ii) trace free energy momentum tensor of the two fluid. Two cases of interacting and non-interacting fluid (barotropic and dark energy) scenario is considered and general results are obtained. The physical aspects of the results obtained are, also, discussed.

  8. Java Access to Numerical Libraries Henri Casanova \\Lambda Jack Dongarra \\Lambda y David M. Doolin \\Lambda

    E-print Network

    Dongarra, Jack

    Java Access to Numerical Libraries Henri Casanova \\Lambda Jack Dongarra \\Lambda y David M. Doolin \\Lambda May 31, 1997 Abstract It is a common and somewhat erroneous belief that Java will always be ``too the question of scientific computing via Java: NetSolve and f2j. The approaches taken by these two projects

  9. Outsourcing Secure Two-Party Computation as a Black Box Henry Carter

    E-print Network

    Outsourcing Secure Two-Party Computation as a Black Box Henry Carter Georgia Institute construction feasible on mobile devices securely outsource the bulk of the computation to a cloud provider. However, these outsourcing techniques are built on specific secure computation assumptions and tools

  10. Indian River to look at outsourcing more government By Henry A. Stephens

    E-print Network

    Belogay, Eugene A.

    Indian River to look at outsourcing more government services By Henry A. Stephens Wednesday. The County Commission agreed to outsource the snack bar, however, and the next year it rebounded with $45 County Administrator Joe Baird outsourced. That followed outsourcing the golf course maintenance in 1996

  11. Investigation of solvent effects on the rate and stereoselectivity of the Henry reaction.

    PubMed

    Kostal, Jakub; Voutchkova, Adelina M; Jorgensen, William L

    2012-01-01

    A combined computational and experimental kinetic study on the Henry reaction is reported. The effects of solvation on the transition structures and the rates of reaction between nitromethane and formaldehyde, and between nitropropane and benzaldehyde are elucidated with QM/MM calculations. PMID:22168236

  12. Henry Evelyn Bliss--The Other Immortal, or a Prophet without Honour?

    ERIC Educational Resources Information Center

    Broughton, Vanda

    2008-01-01

    The paper takes a retrospective look at the work of Henry Evelyn Bliss, classificationist theorist and author of the "Bibliographic Classification". Major features of his writings and philosophy are examined and evaluated for the originality of their contribution to the corpus of knowledge in the discipline. Reactions to Bliss's work are analysed,…

  13. The Henry Ford Academy: An Innovative Space for Teaching and Learning

    ERIC Educational Resources Information Center

    n/a, n/a

    2005-01-01

    Edith Graybill, English instructor at the Henry Ford Academy in Dearborn, Michigan, speaks about her school's English language arts curriculum, the influence of the school on the role of English language arts, the theories of teaching and learning used at the Academy, and other related topics. She believes that most of the students appreciate…

  14. Active learning methods for Interactive Image Philippe Henri Gosselin(1) and Matthieu Cord(2)

    E-print Network

    Paris-Sud XI, Université de

    modification, computes a new query by averaging the feature vectors of relevant images [2]. Another approach1 Active learning methods for Interactive Image Retrieval Philippe Henri Gosselin(1) and Matthieu learning for online content-based image retrieval (CBIR). The classification framework is presented

  15. Naysaying the Neutron Scattering Society Lawrence Cranberg, Jill Trewhella, and Henry R. Glyde

    E-print Network

    Glyde, Henry R.

    Naysaying the Neutron Scattering Society Lawrence Cranberg, Jill Trewhella, and Henry R. Glyde, Austin Naysaying the Neutron Scattering Society The news story announcing the estab- lishment of the Neutron Scattering Society of America (June, page 73) raises a number of questions, and further

  16. A Collision Control Strategy for Multiple Moving Pejman Kamkarian and Henry Hexmoor

    E-print Network

    Hexmoor, Henry

    determine strategies to avoid collisions independently. Keywords: Moving Robots, Robot Collision Control 1 with advantages for multi-robot systems [1]. Another approch to multirobotic collision avoidance is found in [10A Collision Control Strategy for Multiple Moving Robots Pejman Kamkarian and Henry Hexmoor

  17. Re-identification of a lamnid shark embryo Henry F. Mollet

    E-print Network

    865 Re-identification of a lamnid shark embryo Henry F. Mollet Moss Landing Marine Laboratories the shortfin mako (Isurus oxyrinchus 25­30 embryos, one of which was Rafinesque, 1810) but that the high saved embryo measured 36.1 cm total length of information on lamnid reproduction (TL), weighed 800 g, and had

  18. Architectural issues for integration of sensing and acting modalities Henry Hexmoor

    E-print Network

    Hexmoor, Henry

    , sonar, and contact sensory modalities in perceiving obstacles and targets, (2) arbitration of sensingArchitectural issues for integration of sensing and acting modalities Henry Hexmoor Department sensory mechanism. This system takes instruction from a supervisor to go to various agents in the room

  19. FISHES OF THE GULF OF MAINE By HENRY B. BIGELOW and WILLIAM C. SCHROEDER

    E-print Network

    FISHES OF THE GULF OF MAINE By HENRY B. BIGELOW and WILLIAM C. SCHROEDER Museum of ComparativeOInInenced an oceanographic and bIOlogIcal survey of the Gulf of Maine, with special refer- ence to its fishes to its floating Service. 210941-53__2 AREA COVERED The term "Gulf of Maine" covers the oceanic bight from Nantucket Shoals

  20. Manipulation of Nodes in a Connected Car Network Henry Hexmoor1

    E-print Network

    Hexmoor, Henry

    Manipulation of Nodes in a Connected Car Network Henry Hexmoor1 , Guy Fraker2 1 Computer Science and communicate on motorways. The technology cars maintain connections and communicate via Wi-Fi. The Connected cars initiative envisions cars that form a dynamic social network. Each car exchanges local information

  1. Grating transition radiation: A source of quasimonochromatic radiation P. Henri, O. Haeberle,* and P. Rullhusen

    E-print Network

    Boyer, Edmond

    of quasimonochromatic radiation in the far-infrared to mm wavelength range. S1063-651X 99 13211-2 PACS number s : 41 radiation sources in the far-infrared to mm range using transition radiation and the Smith-Purcell effect 1Grating transition radiation: A source of quasimonochromatic radiation P. Henri, O. Haeberle

  2. Did schizophrenia change the course of English history? The mental illness of Henry VI

    Microsoft Academic Search

    Nigel Bark

    2002-01-01

    Henry VI, King of England, at age 19 founded Eton College and King's College, Cambridge. At 31 he had a sudden, dramatic mental illness in which he was mute and unresponsive. Before, he had been paranoid, grandiose, and indecisive. After, he was apathetic with deterioration of ability, drive, interest and self-care, and hallucinations and religious delusions. This illness, which is

  3. Synchronization of chaotic oscillations in doped fiber ring lasers Clifford Tureman Lewis,* Henry D. I. Abarbanel,

    E-print Network

    Illing, Lucas

    Synchronization of chaotic oscillations in doped fiber ring lasers Clifford Tureman Lewis,* Henry D-earth-doped fiber ring lasers is analyzed. The lasers are first coupled by transmitting a fraction c of these model lasers is examined when there is parameter mismatch between the transmitter and receiver lasers

  4. Actively Experiencing Shakespeare: Students "Get on Their Feet" for "Henry IV, Part One."

    ERIC Educational Resources Information Center

    Meyer, Herbert M.; Thomsen, Lee

    1999-01-01

    Discusses how a literature and multimedia course for 11th and 12th graders used active-learning experiences to engage students with Shakespeare's "Henry IV, Part One." Describes how shouting Hal's soliloquy; constructing a chart of character relations; rewriting a scene in their own words; performing, filming, and critiquing a scene; and writing…

  5. The Henry Foundation, Inc. Annual Meeting for 2013, held on July 18.

    E-print Network

    no present conflicts of interest. The treasurer again reported regarding ongoing projects, especially NASA Sorority was rented, as few students from NASA participated. Most students were from the Applied Physics of Officers of the Foundation: President: Richard Conn Henry Treasurer: Rita Mahon Secretary: Adeboyejo Oni

  6. Hispanic Storyteller: Unity through the Use of Narrative in the Speaking of Henry Cisneros.

    ERIC Educational Resources Information Center

    Hanson, Trudy L.

    Henry Cisneros, speaking on the theme, "the colorful past and promising future of Hispanic heroes in Texas," in Amarillo, Texas, on February 7, 1989, was successful in eliciting a positive response from his Anglo/Hispanic audience. An analysis of Cisneros' use of narrative demonstrates its effectiveness in leading to a feeling of "community" by…

  7. 83:1315-1328, 2000.J Neurophysiol Henry Matzner, Yoram Gutfreund and Binyamin Hochner

    E-print Network

    Hochner, Binyamin

    83:1315-1328, 2000.J Neurophysiol Henry Matzner, Yoram Gutfreund and Binyamin Hochner Octopus Yekutieli, Roni Sagiv-Zohar, Binyamin Hochner and Tamar Flash Dynamic Model of the Octopus Arm. II. Control Model of the Octopus Arm. I. Biomechanics of the Octopus Reaching Movement [PDF][Full Text

  8. Stacked Generalization Learning to Analyze Teenage Distress Karthik Dinakar Emily Weinstein* Henry Lieberman Robert Selman*

    E-print Network

    Lieberman, Henry

    Stacked Generalization Learning to Analyze Teenage Distress Karthik Dinakar Emily Weinstein* Henry case teenagers) rather than treat them post-facto. In this study, prevention scientists used a social research that has shown that distressed teenagers seek help and advice anonymously on the internet

  9. The Heuristic Method, Precursor of Guided Inquiry: Henry Armstrong and British Girls' Schools, 1890-1920

    ERIC Educational Resources Information Center

    Rayner-Canham, Geoff; Rayner-Canham, Marelene

    2015-01-01

    Though guided-inquiry learning, discovery learning, student-centered learning, and problem-based learning are commonly believed to be recent new approaches to the teaching of chemistry, in fact, the concept dates back to the late 19th century. Here, we will show that it was the British chemist, Henry Armstrong, who pioneered this technique,…

  10. Neoliberalism, Democracy and the University as a Public Sphere: An Interview with Henry A. Giroux

    ERIC Educational Resources Information Center

    Harper, Victoria

    2014-01-01

    "Truthout" contributor, director of "Truthout's" Public Intellectual Project (truth-out.org/public-intellectual-project) and Truthout board member Henry A. Giroux responds to questions about how the excesses of neoliberal politics have reshaped and subverted the democratic mission of higher education.

  11. Mounting a Curricular Revolution: An Interview with Henry Louis Gates, Jr.

    ERIC Educational Resources Information Center

    von Zastrow, Claus

    2009-01-01

    This article presents an interview with Henry Louis Gates, Jr., Harvard professor and cultural critic who has captured 25 million viewers with his PBS documentary series, African American Lives (WNET). Using genealogical research and DNA science, Gates traces the family history of 19 famous African Americans. What results is a rich and moving…

  12. The Imaginary World of Henri Rousseau. Teacher's Guide. School Arts: Looking/Learning.

    ERIC Educational Resources Information Center

    Henderson, Anne

    While Henri Rousseau's work was not easily classified into any definitive artistic style of the time--impressionism, post-impressionism, fauvism, or cubism--it has been considered a forerunner of surrealism because of its dreamlike sensibility. This teaching guide provides information about Rousseau and his work, focusing on "Tropical Forest with…

  13. Object-based Collective Communication in Java Arnold Nelisse, Thilo Kielmann, Henri E. Bal, Jason Maassen

    E-print Network

    Kielmann, Thilo

    adds the core of MPI's collective operations to Java's object model. CCJ maintains thread groupsObject-based Collective Communication in Java Arnold Nelisse, Thilo Kielmann, Henri E. Bal, Jason library that adds MPI-like collective op- erations to Java. Rather than trying to adhere to the precise

  14. Object-based Collective Communication in Java Arnold Nelisse, Thilo Kielmann, Henri E. Bal, Jason Maassen

    E-print Network

    Kielmann, Thilo

    ) which adds the core of MPI's collective operations to Java's object model. CCJ maintains thread groupsObject-based Collective Communication in Java Arnold Nelisse, Thilo Kielmann, Henri E. Bal, Jason,kielmann,bal,jason¡ @cs.vu.nl An extended version will appear in Joint Java Grande - ISCOPE 2001 Conference, San Francisco

  15. The Family Legacy of Henry Clay: In the Shadow of a Kentucky Patriarch

    Microsoft Academic Search

    Lindsey Apple

    2012-01-01

    Known as the Great Compromiser, Kentuckian Henry Clay left a valuable legacy to his country by defining the role of Speaker of the House, envisioning a plan, the American System, that foretold the economic development of the nation, and fashioning compromises that postponed civil war until a southern victory was far less likely. He failed, however, to become president, and

  16. Relaciones de poder-saber en la doctrina administrativa de Henri Fayol

    Microsoft Academic Search

    Diego Adrián Arévalo

    2011-01-01

    La doctrina administrativa científica fundada por el ingeniero Henri Fayol, propuso llevar adelante el despliegue, desde el último cuarto del siglo XIX hacia finales del primer cuarto del siglo XX, de un proceso de racionalización sobre el campo administrativo en su totalidad, tanto en su esfera teórica como en su esfera práctica. Por medio de un proceso de normalización, por

  17. Scheduling Architectures for DiffServ Networks with Input Queuing , Henry Selvaraj

    E-print Network

    Yang, Mei

    1 Scheduling Architectures for DiffServ Networks with Input Queuing Switches Mei Yang , Henry, the differentiated services (DiffServ) model is expected to be widely deployed across wired and wireless networks. Though DiffServ supporting scheduling algorithms for output- queuing (OQ) switches have been widely

  18. High School Decision-Making at Henry Lord Middle School in Fall River

    ERIC Educational Resources Information Center

    Bronhard, Aimee A.

    2012-01-01

    The purpose of this qualitative study was to investigate how students at Henry Lord Middle School in Fall River take into consideration their initial college and career aspirations when making their decision for high school. Self-efficacy theory, critical theory, and a literature review related to high school decision-making inform the analysis of…

  19. Human-Agent Interaction: Case Strudies in Human Supervised UAV Henry Hexmoor and Srinivas Battula

    E-print Network

    Hexmoor, Henry

    Human-Agent Interaction: Case Strudies in Human Supervised UAV Henry Hexmoor and Srinivas Battula and trust that enable them to have a more socially adept interaction with a human supervisor their reliance on human supervision as it takes different lengths of time. Keywords: Agents, Autonomy, Trust

  20. Sync Pulse Usage in CASPER DSP Blocks Henry Chen, Peter McMahon, Aaron Parsons

    E-print Network

    California at Berkeley, University of

    Sync Pulse Usage in CASPER DSP Blocks Henry Chen, Peter McMahon, Aaron Parsons August 1, 2008 1 Overview Most CASPER DSP blocks have a streaming architecture in which, after some initialization period to the reconfigurable, black-box nature of the CASPER DSP library, processing latency through a block varies depending

  1. APPROXIMATING OFF-LATTICE KINETIC MONTE CARLO HENRY A. BOATENG, TIM P. SCHULZE, AND PETER SMEREKA

    E-print Network

    Schulze, Tim

    APPROXIMATING OFF-LATTICE KINETIC MONTE CARLO HENRY A. BOATENG, TIM P. SCHULZE, AND PETER SMEREKA between these basins of attraction. For the system to transition from basin i to basin j, it has-1300 (schulze@math.utk.edu). (psmereka@umich.edu) 1 #12;2 H. A. BOATENG,T. P. SCHULZE and P. SMEREKA

  2. The Historical and Social Significance of Teacher Education: A Profile of Henry Barnard.

    ERIC Educational Resources Information Center

    Teeter, Ruskin

    A brief biography is presented of Henry Barnard, one of the leading educators in America during the first half of the 19th century. An early and forceful advocate of free public education, Barnard promulgated his ideas through public service and teaching as well as through writings in "The American Journal of Education," which he edited between…

  3. Control-Structure Ratings on the Fox River at McHenry and Algonquin, Illinois

    USGS Publications Warehouse

    Straub, Timothy D.; Johnson, Gary P.; Hortness, Jon E.; Parker, Joseph R.

    2009-01-01

    The Illinois Department of Natural Resources-Office of Water Resources operates control structures on a reach of the Fox River in northeastern Illinois between McHenry and Algonquin. The structures maintain water levels in the river for flood-control and recreational purposes. This report documents flow ratings for hinged-crest gates, a broad-crested weir, sluice gates, and an ogee spillway on the control structures at McHenry and Algonquin. The ratings were determined by measuring headwater and tailwater stage along with streamflow at a wide range of flows at different gate openings. Standard control-structure rating techniques were used to rate each control structure. The control structures at McHenry consist of a 221-feet(ft)-long broad-crested weir, a 4-ft-wide fish ladder, a 50-ft-wide hinged-crest gate, five 13.75-ft-wide sluice gates, and a navigational lock. Sixty measurements were used to rate the McHenry structures. The control structures at Algonquin consist of a 242-ft-long ogee spillway and a 50-ft-wide hinged-crest gate. Forty-one measurements were used to rate the Algonquin control structures.

  4. Neutron powder diffraction of carbon-coated FeCo alloy nanoparticles John Henry J. Scotta)

    E-print Network

    McHenry, Michael E.

    Neutron powder diffraction of carbon-coated FeCo alloy nanoparticles John Henry J. Scotta to the transformation seen in bulk equiatomic FeCo. Although it is very difficult to quench the disordered state in bulk of Physics. S0021-8979 99 37008-0 INTRODUCTION For many decades FeCo alloys have played an important role

  5. BUBBLE STRIPPING TO DETERMINE HYDROGEN CONCENTRATIONS IN GROUND WATER: A PRACTICAL APPLICATION OF HENRY'S LAW

    EPA Science Inventory

    The Bubble Stripping Method is a chemical testing method that operates on the principle of Henry's Law. It is useful for determining concentrations of hydrogen in well water, and it is capable of detecting concentrations on the order of nanomoles per liter. The method provides ...

  6. Development of a Career Student Guide for the Tech Prep Program for Henry County High School.

    ERIC Educational Resources Information Center

    Winchester, Ruth Ann

    This practicum report describes the research conducted in preparation for developing a career student guide to acquaint students attending Henry County High School (HCHS) in McDonough, Georgia, with the school's new tech prep program. Chapters 1 and 2 contain background information about HCHS' tech prep program and a review of literature regarding…

  7. An Index of Images in English Manuscripts from the Time of Chaucer to Henry VIII

    Microsoft Academic Search

    Martha Driver; Michael Orr

    2007-01-01

    An Index of Images in English Manuscripts from the Time of Chaucer to Henry VIII, by Martha Driver, PhD, Distinguished Professor of English, Dyson College of Arts and Sciences, and Michael Orr An Index of Images, by Martha Driver and Michael Orr, was published by Harvey Miller and Brepols Publishers in spring 2007. The book is one of a series

  8. A Guide to the Pension Options James A. Chalfant and Helen L. Henry1

    E-print Network

    Krstic, Miroslav

    [1] A Guide to the Pension Options James A. Chalfant and Helen L. Henry1 Explanatory note for new-tier pension plans, for a small number of "typical cases". Those will be very valuable framework. Introduction Pension provisions under the current UCRP will apply to past service credit, i

  9. Abraham Pais Prize for History of Physics Talk: Henry Cavendish, John Michell, Weighing the Stars

    Microsoft Academic Search

    Russell McCormmach

    2010-01-01

    This talk is about an interaction between two 18th-century natural philosophers (physical scientists), Henry Cavendish and John Michell, and its most important outcome, the experiment of weighing the world (their name for it) using a torsion balance (our name for it). Michell was the most inventive of the 18th century English natural philosophers, and Cavendish was the first of his

  10. EMAE'S experience in the substitution of the regulation systems of the underground power plant, Henry Borden

    Microsoft Academic Search

    A. T. A. M. A. Tomazelli; A. Martins; C. A. R. da Silva; E. Delboni; J. A. da Silva Matos; M. G. D'Avila; J. R. Muriano; M. A. Pinto

    2003-01-01

    The aim of this paper is to present Henry Borden's regulation systems modernization. This power plant is located in Cubatao, Sao Paulo, and the company responsible for it is EMAE - Empresa Metropolitan de Aguas e Energia S\\/A. The modernization consisted in the total substitution of the regulation systems, which include the installation of digital electronic governors and potential regulation,

  11. Organocatalytic asymmetric intramolecular aza-Henry reaction: facile synthesis of trans-2,3-disubstituted tetrahydroquinolines.

    PubMed

    Maity, Rajendra; Pan, Subhas Chandra

    2015-06-10

    An enantio- and diastereoselective organocatalytic intramolecular aza-Henry (nitro-Mannich) reaction has been developed. The trans-2-aryl-3-nitro-tetrahydroquinoline products are obtained in high yields and in good enantioselectivities with a bifunctional tertiary amine-thiourea catalyst. Excellent enantioselectivities were obtained after single recrystallization of some products. PMID:26013595

  12. PARTIAL CUBES AND CROSSING GRAPHS # SANDI KLAV ZAR + AND HENRY MARTYN MULDER #

    E-print Network

    Klavzar, Sandi

    PARTIAL CUBES AND CROSSING GRAPHS # SANDI KLAV Ÿ ZAR + AND HENRY MARTYN MULDER # SIAM J. DISCRETE. Partial cubes are defined as isometric subgraphs of hypercubes. For a partial cube G, its crossing graph G of some median graph and that a partial cube G is 2­connected if and only if G # is connected. A partial

  13. PARTIAL CUBES AND CROSSING GRAPHS SANDI KLAVZAR AND HENRY MARTYN MULDER

    E-print Network

    Klavzar, Sandi

    PARTIAL CUBES AND CROSSING GRAPHS SANDI KLAVZAR AND HENRY MARTYN MULDER SIAM J. DISCRETE MATH. c 2002 Society for Industrial and Applied Mathematics Vol. 15, No. 2, pp. 235­251 Abstract. Partial cubes are defined as isometric subgraphs of hypercubes. For a partial cube G, its crossing graph G# is introduced

  14. Climate Change in Massachusetts: What Would Henry Say? Mondays/Wednesdays

    E-print Network

    Goldberg, Bennett

    1 Climate Change in Massachusetts: What Would Henry Say? KHC BI 101 Fall 2012 Mondays of climate change. If Thoreau were alive today, he could readilyobserve the impacts of climate change climate change research. The students will read Walden concurrently with Eaarth by Bill McKibben along

  15. Tumor-like Anomalies in Lake Michigan Zooplankton Primary Investigator: Henry Vanderploeg -NOAA GLERL

    E-print Network

    Tumor-like Anomalies in Lake Michigan Zooplankton Primary Investigator: Henry Vanderploeg - NOAA GLERL Co-Investigators: Maria Manca - CNR - Istituto per lo Studio degli Ecosistemi Background Tumor Environmental Health and Biomolecular Research and John C. Harshbarger of the Registry of Tumors in Lower

  16. Cosmic microwave background with Brans-Dicke gravity. II. Constraints with the WMAP and SDSS data

    SciTech Connect

    Wu Fengquan; Chen Xuelei [National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012 (China)

    2010-10-15

    Using the covariant formalism developed in a companion paper [F.-Q. Wu, L. E. Qiang, X. Wang, and X. Chen, preceding Article, Phys. Rev. D 82, 083002 (2010)] (paper I), we derive observational constraints on the Brans-Dicke model in a flat Friedmann-Lemaitre-Robertson-Walker universe with a cosmological constant and cold dark matter. The CMB observations we use include the Wilkinson Microwave Anisotropy Probe 5 yr data, the Arcminute Cosmology Bolometer Array Receiver 2007 data, the Cosmic Background Imager polarization data, and the Balloon Observations of Millimetric Extragalactic Radiation and Geophysics 2003 flight data. For the large scale structure we use the matter power spectrum data measured with the luminous red galaxy survey of the Sloan Digital Sky Survey Data Release 4. We parametrize the Brans-Dicke parameter {omega} with a new parameter {zeta}=ln(1/{omega}+1), and use the Markov-Chain Monte Carlo method to explore the parameter space. We find that using CMB data alone, one could place some constraints on positive {zeta} or {omega}, but negative {zeta} or {omega} could not be constrained effectively. However, with additional large scale structure data, one could break the degeneracy at {zeta}<0. The 2{sigma} (95.5%) bound on {zeta} is -0.008 37<{zeta}<0.010 18 (corresponding to {omega}<-120.0 or {omega}>97.8). We also obtained constraints on G/G, the rate of change of G at present, as -1.75x10{sup -12} yr{sup -1}

  17. Parametrial fat tissue from high fat diet-treated SKH-1 mice stimulates transformation of mouse epidermal JB6 cells

    PubMed Central

    Bernard, Jamie J.; Lou, You-Rong; Peng, Qing-Yun; Li, Tao; Vakil, Priyal R.; Ding, Ning; Laskin, Jeffrey D.; Dong, Zigang; Conney, Allan H.; Lu, Yao-Ping

    2015-01-01

    Our previous studies indicated that decreasing visceral adipose tissue by surgical removal of the parametrial fat pads inhibited UVB-induced carcinogenesis in SKH-1 mice fed a high fat diet (HFD), but not a low fat diet (LFD) indicating that the parametrial fat tissue from mice fed a HFD played a role in skin carcinogenesis. Objective In the present study, we sought to investigate how a HFD may influence the intrinsic properties of the parametrial fat tissue to influence UVB-induced skin tumor formation. Methods and results Immunohistochemical staining, adipokine array, and flow cytometry showed that parametrial fat tissue from mice fed a HFD had a higher density of macrophage-fused dead adipocytes (crown-like structures), more adipokines, and stimulated the production of more reactive oxygen species compared with parametrial fat tissue from mice fed a LFD. These differences between parametrial fat tissue from mice fed a HFD and LFD were associated with their effect on the in vitro transformation of mouse epidermal JB6 cells. Our results indicated that fat tissue filtrate (an aqueous filtrate made from the parametrial fat pad) from mice fed a HFD enhanced the conversion of JB6 cells from an epithelial-like morphology to cells with a fibroblast-like morphology to a greater extent than fat tissue filtrate from mice fed a LFD. Studies indicated that the fibroblast-like cells had decreased levels of E-cadherin, increased levels of Twist as assayed by western blot. Fat tissue filtrate made from the parametrial fat tissue of mice fed a HFD had 160% more transforming activity than that from mice fed a LFD and formed malignant mesenchymal tumors in vivo. Conclusion These studies provide the first in vitro demonstration of a parametrial fat tissue-induced transformation of an epidermal cell. PMID:25821644

  18. Creation of arbitrary Dicke and NOON states of trapped-ion qubits by global addressing with composite pulses

    E-print Network

    Svetoslav S. Ivanov; Nikolay V. Vitanov; Natalia V. Korolkova

    2013-01-01

    We propose a fast and efficient technique to create classes of highly entangled states of trapped ions, such as arbitrary Dicke states and superpositions of them, e.g. NOON states. The ions are initialized in the phonon ground state and are addressed globally with a composite pulse that is resonant with the first motional sideband. The technique operates on comparatively short time scales, as resonant interactions allow one to use the minimum laser pulse area. The number of single pulses from the composite sequence is equal to the number of ions, thus the implementation complexity grows only linearly with the size of the system. The approach does not require individual addressing of the ions in the trap and can be applied both inside and outside the Lamb-Dicke regime.

  19. Creation of arbitrary Dicke and NOON states of trapped-ion qubits by global addressing with composite pulses

    NASA Astrophysics Data System (ADS)

    Ivanov, Svetoslav S.; Vitanov, Nikolay V.; Korolkova, Natalia V.

    2013-02-01

    We propose a fast and efficient technique to create classes of highly entangled states of trapped ions, such as arbitrary Dicke states and superpositions of them, e.g. NOON states. The ions are initialized in the phonon ground state and are addressed globally with a composite pulse that is resonant with the first motional sideband. The technique is fairly robust to parameter fluctuations and operates on comparatively short time scales, as resonant interactions allow one to use the minimum laser pulse area. The number of single pulses from the composite sequence is equal to the number of ions; thus the implementation complexity grows only linearly with the size of the system. The approach does not require individual addressing of the ions in the trap and can be applied both inside and outside the Lamb-Dicke regime.

  20. Extended phase space thermodynamics and $P-V$ criticality of charged black holes in Brans-Dicke theory

    E-print Network

    Hendi, S H

    2015-01-01

    In this paper, taking in to account Brans-Dick theory, we investigate thermodynamic behavior of charged black hole solutions. We study the analogy of the black hole solution with the Van der Waals liquid-gas system in the extended phase space by considering the cosmological constant as dynamical pressure. We obtain critical values of thermodynamic coordinates and plot $P-r_{+}$ and $G-T$ diagrams to study the phase transition.