Paris-Sud XI, Université de
HENRY, J.-B., MALET, J.-P., MAQUAIRE, O., GRUSSENMEYER, P., (2002). The use of small-format and low. MAQUAIRE2 and P. GRUSSENMEYER1 1 Laboratoire d'Etudes et de Recherche en Génie Civil de Strasbourg (LERGEC
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)
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.
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.
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).
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
Student Simulations Engineer JB-119 Specific roles
Pinsky, Ross
) with job code- 119 to: hr.israel@cvwebmail.net Physics Student JB-41 Specific roles: Develop and test/Python/C/C++/Fortran) Please send CV (in English) with job code- 41 to: hr.israel@cvwebmail.net #12;Student Simulations Engineer JB- 119 Specific roles: Perform metrology and/or lithography
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.
NASA Astrophysics Data System (ADS)
Jossem, E. Leonard
2007-09-01
Physicist, polymath, educator, leader, Horace Richard Crane died on April 19, 2007, a few months short of his 100th birthday. Those of us who were fortunate enough to have had him as a friend mourn his loss, but for all of us he leaves a rich and varied legacy of published works that invite reading and rereading. Dick's work as a physicist was recognized in 1966 by his election to the National Academy of Sciences and in 1986 by the award of the President's National Medal of Science: "For the first measurement of the magnetic moment and spin of free electrons and positrons."
ERIC Educational Resources Information Center
Nikola-Lisa, W.
1998-01-01
Compares three children's books retelling the legend of John Henry: "John Henry: An American Legend" by Ezra Jack Keats (1965), "John Henry" by Julius Lester (1994), and "The Legend of John Henry" by Terry Small (1994). Differences in imagery, language, symbolism, and themes are discussed. (MAK)
NSDL National Science Digital Library
Susie Waters
2012-08-01
Uncle Henry's Dilemma is a problem solving lesson to determine the global location for the reading of Uncle Henry's will. The students will interpret data sets which include temperature, rainfall, air pollution, travel cost, flight times and health issues to rank five global locations for Uncle Henry's relatives to travel to for the reading of his will. This is an engaging, fun-filled MEA lesson with twists and turns throughout. Students will learn how this procedure of selecting locations can be applied to everyday decisions by the government, a business, a family, or individuals.
Federal Register 2010, 2011, 2012, 2013, 2014
2010-05-04
...Orders Finding That the Henry Financial Basis Contract, Henry Financial Index Contract...determination whether the Henry Financial Basis (``HEN'') contract, Henry Financial...the contracts on a frequent and recurring basis. Material price reference--the...
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 ??About? section, first-time visitors may wish to acquaint themselves with the various phases of his work in ??The Collection? section, which includes sub-sections titled ??Early Legal Career?, ??Pittsburgh Civic Activity?, and ??Audio?, which contains campaign speeches and the like.
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 â??Dominionâ? whale symposium and exhibition, they came to believe that there was something more to their â??Moby Dickâ? 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.
Supporting the Dick Vet The Royal (Dick) School ofVeterinary Studies was
Edinburgh, University of
Supporting the Dick Vet The Royal (Dick) School ofVeterinary Studies was founded in 1823 by William Dick, and is one of the world's most innovative and influential centres for veterinary care and student work to bring the DickVet's ambitions of world-class quality veterinary care and education to fruition
DICK'S HOUSE Questions and answers to frequently
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
NASA Astrophysics Data System (ADS)
Guzmn, Enrique
1997-09-01
By solving a Wheeler-De Witt `extended' equation in the Brans-Dicke theory, we have found that the probability distribution predicts: i) An initial value for the Brans-Dicke scalar field ? ?1/2_VAC in the beginning of the inflation, where ?VAC is the vacuum density energy (this gives a planck mass ?1/4_VAC) ii) Large values for the Brans-Dicke parameter w. On the other hand it is shown that by taking into account the dynamical behaviour of ? and the matter scalar field ? we can formulate a `creation boundary condition' where in the `beginning' of the Universe (R =0, `nothing' for some authors) we have a dynamical ? already `created'. This could be the energetic mechanism which makes Universe tunnels the potential barrier to evolve classically after. Besides we have found the possibility of a cosmological uncertainty principle.
Tian, David Wenjie
2015-01-01
According to Lovelock's theorem, the Hilbert-Einstein and the Lovelock actions are indistinguishable from their field equations. However, they have different scalar-tensor counterparts, which correspond to the Brans-Dicke and the \\emph{Lovelock-Brans-Dicke} (LBD) gravities, respectively. In this paper the LBD model of alternative gravity with the Lagrangian density $\\mathscr{L}_{\\text{LBD}}=\\frac{1}{16\\pi}\\left[\\phi\\left(R+\\frac{a}{\\sqrt{-g}}{}^*RR + b\\mathcal{G}\\right)-\\frac{\\omega_{\\text L}}{\\phi}\
ERIC Educational Resources Information Center
Robinson, Douglas
1991-01-01
Explores the ways in which Henry James' narrative use of euphemism in "The Golden Bowl" can offer new interpretive avenues for the novel itself, for literary texts in general, and for the teacher-critic's professional activity in the larger context of the academic institution. (RS)
Henry Fuseli: "The Nightmare."
ERIC Educational Resources Information Center
Shannon, Helen
1987-01-01
Based on a full-color reproduction of Henry Fuseli's 1781 painting, "The Nightmare," the purpose of this lesson is to introduce a painting that presents a pioneering idea about the nature of dreams, and to help students understand how a masterpiece often points to new directions in thought and beliefs. (JDH)
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
Exchange reactions with Dick Dalitz
NASA Astrophysics Data System (ADS)
Davis, D. H.
2008-05-01
An account is given of the close collaboration of Dick Dalitz with the European K Collaboration over many decades in many aspects of hypernuclear physics. In particular, emphasis is given to the topics of double hypernuclei and the discovery and resolution of p-wave ? strangeness exchange states. A brief review of early work on non-mesonic decays of hypernuclei is also given.
NSDL National Science Digital Library
2005-01-01
Whatever one??s feelings may be about Henry Ford, his legacy to the American public is tremendous, and his love of American history is well-documented. Part of this legacy may be found at the Henry Ford Museum complex, which contains a number of operational units, such as Greenfield Village and the Benson Ford Research Center. For those who might be unable to make the pilgrimage to Michigan, the Museum??s omnibus website will help bring some of the fine edifying material into their homes. For starters, there is the ??Explore & Learn? area of the site, which contains a number of online exhibits such as a tour of the bus that carried Rosa Parks on her fateful trip in Montgomery and the ??Innovators? exhibit, which profiles such Americans as Thomas Edison and R. Buckminster Fuller.
Homological Algebra Henri Cartan and
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
WILLIAM HENRY: CHRISTIAN CHURCH MINISTER
Page 1 WILLIAM HENRY: CHRISTIAN CHURCH MINISTER WATERLOO TOWNSHIP COUNCILLOR FARMER By Rosemary was Elder William Henry of the Christian Church, who first ministered to members of his faith from his base at the Christian Church east of Kossuth in Waterloo Township from 1853-1869. He then moved to Minto Township
NSDL National Science Digital Library
CyberBee.com
2002-01-01
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. Copyright 2005 International Technology Education Association
The Apocalyptic Vision of Philip K. Dick
Steven Best; Douglas Kellner
2003-01-01
Interrogating the importance of the writings of Philip K. Dick for critical cultural studies and social theory, the authors provide contextual and political readings of his work. Although H. G. Wells carried through a crucial science fiction breakthrough, Philip K. Dick emerges in the reading as the poet laureate of the postmodern adventure in his bleak and frightening portrayals of
Brans-Dicke Gravity from Entropic Viewpoint
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.
American Experience: Henry Ford
NSDL National Science Digital Library
2013-01-29
Henry Ford had a profound influence on America and the world in the 20th century. He was involved in a vast array of enterprises during his life, including the quest for world peace, automobile manufacturing, and even attempting to build a type of utopia in the Amazon known as "Fordlandia." This arresting documentary from PBS's American Experience series looks into his life in great detail. Visitors can watch the entire program here and also look through a range of photo galleries. The galleries include shots of workers at the Ford factory, along with videos of Ford "camping" with Thomas Edison. Perhaps the most interesting video here is one in which Ford gives dance lessons as part of his leisure time in Dearborn, Michigan.
Cosmic acceleration and Brans-Dicke theory
Sharif, M., E-mail: msharif.math@pu.edu.pk; Waheed, S. [University of the Punjab, Department of Mathematics (Pakistan)
2012-10-15
We study the accelerated expansion of the universe by exploring the Brans-Dicke parameter in different eras. For this, we take the FRW universe model with a viscous fluid (without potential) and the Bianchi type-I universe model with a barotropic fluid (with and without a potential). We evaluate the deceleration parameter and the 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.
Quantum Metrology with Dicke Squeezed States
Zhen Zhang; Luming Duan
2014-07-02
We introduce a new class of quantum many-particle entangled states, called the Dicke squeezed (or DS) states, which can be used to improve the precision in quantum metrology beyond the standard quantum limit. We show that the enhancement in measurement precision is characterized by a single experimentally detectable parameter, called the Dicke squeezing $\\xi_{D}$, which also bounds the entanglement depth for this class of states. The measurement precision approaches the ultimate Heisenberg limit as $\\xi_{D}$ attains the minimum in an ideal Dicke state. Compared with other entangled states, we show that the Dicke squeezed states are more robust to decoherence and give better measurement precision under typical experimental noise.
NSDL National Science Digital Library
Henry Ossawa Tanner, 1859-1937, was a deeply religious, mystical painter, who, as an African-American, found it difficult to gain acceptance for his artwork in the United States, and lived most of his life in France. The Smithsonian American Art Museum presents this comprehensive online exhibition on Tanner's life and work, utilizing both paintings and archival materials from its collections. The Flash exhibit is divided into three sections. First, there is Biography, essentially an illustrated timeline, including photographs showing Tanner in his studio at 51 boulevard Saint-Jacques, Paris, ca. 1900, and Tanner's wife, Jesse Macauley Olssen, at the time of their marriage in 1899. Second, Work in Context, where users can first read a bit about Tanner's education and contemporaries, then view examples of Tanner's work, and try a self-test, attempting to pick out the Tanner paintings from groups of four paintings on particular themes, e.g. Nocturnes, Portraits, Shepherds. Finally there is a Gallery of all 57 Tanners held by the Smithsonian American Art Museum.
Quantum criticality in a generalized Dicke model
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.
Generalized Brans-Dicke theories
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.
Henry Chan Inclusive Education Award Application Guideline
Tam, Vincent W. L.
Henry Chan Inclusive Education Award Application Guideline 1. Objective To recognize the excellent disorders, autism/autistic spectrum disorders, hearing impairments, mental illnesses, physical handicap, March 15, 2014 #12;Henry Chan Inclusive Education Award Application Guideline 6. Assessment
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.
Handbook for Royal (Dick) School of Veterinary Studies
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
Beekeeping 101 Mary Beth Henry
Jawitz, James W.
programs to build capacity in teaching and learning around the state. Contact Information: Mary Beth Henry at mbhenry@ufl.edu or (863) 519-8677 x 110 #12;2 Capacity Building for Sustainable Living Jennifer Taylor, PhD College of Agriculture and Food Sciences, Cooperative Extension Program, Florida Agricultural & Mechanical
[The Henry E. Huntington Library.
ERIC Educational Resources Information Center
Abraham, Terry
The biographical sketch of Henry E. Huntington includes a description of the establishment of the Huntington Library and the purpose and scope of its collection. Although this is a free and public library, its use is restricted to qualified scholars having legitimate research needs. Photographic techniques were developed at the Huntington Library
ERIC Educational Resources Information Center
Trend, David
2012-01-01
Henry A. Giroux is well known for pushing the definitions of education. From his early forays into what has been termed the "New Sociology of Education" in the early 1980s to his more recent discussions of "public pedagogy", Giroux has methodically challenged existing orthodoxies. This essay will focus on the interdisciplinary broadening of
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
Fermat's Last Theorem Henri Darmon
Darmon, Henri
Fermat's Last Theorem Henri Darmon (darmon@math.mcgill.ca) Department of Mathematics Mc #12;Introduction Fermat's Last Theorem Fermat's Last Theorem states that the equation xn + yn = zn , xyz = 0 has no integer solutions when n is greater than or equal to 3. Around 1630, Pierre de Fermat
JPlex Matlab Tutorial Henry Adams
Johansson, Mikael Vejdemo
JPlex Matlab Tutorial Henry Adams henrya@ima.umn.edu December 26, 2011 NOTE: As of 2011, JPlex a tutorial. We suggest that JPlex users switch to javaPlex. The javaPlex code is available at http://code.google.com/p/javaplex and the tutorial is available at http://javaplex.googlecode. com/svn/trunk/reports/javaplex_tutorial/javaplex_tutorial
Darby's Dream Richard Conn Henry
Darby's Dream Richard Conn Henry Department of Physics and Astronomy, The Johns Hopkins University Manhattan. And Darby drifted into his dream: II. YOU You know that you exist! And that is the only thing! To begin with, you do also have dreams, don't you? You do not think that what appears in dreams is "real
Joseph Henry and the Telegraph
NASA Astrophysics Data System (ADS)
Hochfelder, David
1997-04-01
Morse's telegraph rested upon three scientific advances which occured between 1800 and 1830: the development of battery technology, the formulation of laws governing the behavior of electrical components in circuits, and the discovery of electromagnetic phenomena. Joseph Henry was crucial to the development of the early telegraph. His work on electromagnetism made it possible for the electric current to manifest itself as useful mechanical work. Henry developed electromagnets of sufficient lifting power, but which drew relatively small currents; these magnets were the heart of Morse's telegraph receiver. Morse also used electromagnets as relays, which allowed him to transmit signals over great distances. Morse often acknowledged his debt to Henry, and the two enjoyed a cordial working relationship until the mid-1840s. But during the bitter and protracted litigation over Morse's patent, Henry testified (unwillingly, he claimed) against the inventor. This began a lifelong quarrel between the two men, the specifics of which were tedious and petty. In general terms, however, their conflict arose over different notions regarding scientific discovery and technological innovation.
Malcolm, Alan D B
2002-04-01
The books of Jean Henri Fabre, replete with lively accounts of his observations on nature, inspired generations of children from all over the world. The detail in his study of insects and the entertaining presentation allowed readers to absorb his fascination. Yet, he was a physics teacher by profession and virtually self taught on matters of entomology. PMID:11932507
JB-300: An advanced medium size transport for 2005
NASA Technical Reports Server (NTRS)
Debrouwer, Giles; Graham, Katherine; Ison, Jim; Juarez, Vince; Moskalik, Steve; Pankonin, Jon; Weinstein, Arnold
1993-01-01
In the fall of 1992, the TAC Team was presented with a Request for Proposal (PFP) for a mid-size (250-350 passenger) commercial transport. The aircraft was to be extremely competitive in the areas of passenger comfort, performance, and economic aspects. Through the use of supercritical airfoils, a technologically advanced Very High By-pass Ratio (VHBR) turbofan engine, a low overall drag configuration, a comparable interior layout, and mild use of composites, the JB-300 offers an economically viable choice to the airlines. The cents per passenger mile of the JB-300 is 1.76, which is considerably lower than current aircraft in the same range. Overall, the JB-300 is a technologically advanced aircraft, which will meet the demands of the 21st century.
Wormholes in Vacuum Brans-Dicke Theory
Arunava Bhadra; Kabita Sarkar
2005-01-01
It is shown that among the different classes of claimed static wormhole solutions of the vacuum Brans-Dicke theory only Brans Class I solution with coupling constant omega less than -1.5 (excluding the point omega = 2) gives rise to physically viable traversable wormhole geometry. Usability of this wormhole geometry for interstellar travel has been examined.
Wormholes in vacuum Brans-Dicke theory
Arunava Bhadra; Kabita Sarkar
2006-02-22
It is shown that among the different classes of claimed static wormhole solutions of the vacuum Brans-Dicke theory only Brans Class I solution with coupling constant $\\omega$ less than -1.5 (excluding the point $\\omega =2$) gives rise to physically viable traversable wormhole geometry. Usability of this wormhole geometry for interstellar travel has been examined.
Mean field description of the Dicke Model
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.
Functional Methods in the Generalized Dicke Model
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.
Masterarbeit Bestimmung der Dicke von TEM-Lamellen mittels konvergenter
Pfeifer, Holger
Masterarbeit Bestimmung der Dicke von TEM-Lamellen mittels konvergenter Beugung und Elektronenenergieverlustspektroskopie Thema: Die Dicke von TEM-Lamellen ist entscheidend für die Qualität von TEM-Untersuchungen. So wird höchste (atomare) Auflösung nur für dünnste Proben von wenigen nm Dicke erreicht. Während z.B. bei
Nonlocality of $W$ and Dicke states subject to losses
Tomer Jack Barnea; Gilles Ptz; 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.
Nonlocality of W and Dicke states subject to losses
NASA Astrophysics Data System (ADS)
Barnea, Tomer Jack; Ptz, Gilles; Brask, Jonatan Bohr; Brunner, Nicolas; Gisin, Nicolas; Liang, Yeong-Cherng
2015-03-01
We discuss the nonlocality of W and 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 monotonic.
RICHARD CONN HENRY updated 2014 May 06
London) Children: George William Henry (MA Biochemistry 2005, Oxford) Mark Winston Henry (MA History 2009 for Advanced Study, Princeton, New Jersey 1966 Research Assistant, Institute for Advanced Study, Princeton, New a Country," a panel discussion at the Johns Hopkins School of Advanced International Studies, Washington, DC
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
Origins Program Update Henry Throop, NASA HQ
Throop, Henry
Origins Program Update Henry Throop, NASA HQ Program officer: Origins of Solar Systems (OSS Overview · Origins is one of NASA's core research & analysis (R&A) programs, focusing on... · # 1, 2, 3: NASA Planetary Science Division (Henry Throop), $6M/yr · # 4, 5: NASA Astrophysics Division (Mario
John Henry--The Steel Driving Man
ERIC Educational Resources Information Center
Murphy, David E.; Gulley, Laura L.
2005-01-01
The story of John Henry provided the setting for sixth-grade class to participate in a John Henry Day of mathematics experiments. The students collected data from experiments where students competed against machines and technology. The student analyzed the data by comparing two box plots, a box plot of human data, and a box plot of machine or
Abstract--The Moby Dick project focuses on developing theories, architectures and
Havinga, Paul J.M.
Abstract--The Moby Dick project focuses on developing theories, architectures and applications computing, security, energy management, hybrid networks, data consistency I. INTRODUCTION In the Moby Dick
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.
Quantum tunneling in the adiabatic Dicke model
Chen Gang [Department of Physics, Shaoxing College of Arts and Sciences, Shaoxing 312000 (China); Institute of Theoretical Physics, Shanxi University, Taiyuan 030006 (China); Chen Zidong [Department of Physics, Shaoxing College of Arts and Sciences, Shaoxing 312000 (China); Liang Jiuqing [Institute of Theoretical Physics, Shanxi University, Taiyuan 030006 (China)
2007-10-15
The Dicke model describes N two-level atoms interacting with a single-mode bosonic field and exhibits a second-order phase transition from the normal to the superradiant phase. The energy levels are not degenerate in the normal phase but have degeneracy in the superradiant phase, where quantum tunneling occurs. By means of the Born-Oppenheimer approximation and the instanton method in quantum field theory, the tunneling splitting, inversely proportional to the tunneling rate for the adiabatic Dicke model, in the superradiant phase can be evaluated explicitly. It is shown that the tunneling splitting vanishes as exp(-N) for large N, whereas for small N it disappears as {radical}(N)/exp(N). The dependence of the tunneling splitting on the relevant parameters, especially on the atom-field coupling strength, is also discussed.
What We Talk around when We Talk about "The Dick"
ERIC Educational Resources Information Center
Savage, Elizabeth
2011-01-01
Some years ago, the author had her first opportunity to teach an undergraduate American Romanticism course, which meant she had a chance to teach "Moby-Dick" the way she thought it should be taught. Meeting two days a week, her course was set up so that students read about thirty pages of "Moby-Dick" for one class meeting a week paired with
Vacuumless cosmic strings in Brans-Dicke theory
A. A. Sen
2000-02-13
The gravitational fields of vacuumless global and gauge strings have been studied in Brans-Dicke theory under the weak field assumption of the field equations. It has been shown that both global and gauge string can have repulsive as well as attractive gravitational effect in Brans-Dicke theory which is not so in General Relativity.
Brans-Dicke Scalar Field as a Chameleon
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 $\\omega$.
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.
Brane Cosmic String Compactification in Brans-Dicke Theory
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.
Managers as Androids: Reading Moral Agency in Philip Dick
Nidhi Srinivas
1999-01-01
Philip Dick's science fiction (SF) offers a stimulating critique of modernity. One of his important themes was the gradual replacement of the empathy of humans with the cold logic of machines. Using Arendt (1964), Bauman (1991) and Tester (1997), I argue that managers are prone to moral indifference. This tendency was termed androidization by Dick, the transformation of human beings
Gravitation and the earth sciences: the contributions of Robert Dicke
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.
Part 1: First Phase Project Overview LTR 20422 ---MOBY DICK, The Mobile Digital Companion
Havinga, Paul J.M.
Part 1: First Phase Project Overview LTR 20422 ---MOBY DICK, The Mobile Digital Companion MOBY DICK Overview LTR 20422 ---MOBY DICK, The Mobile Digital Companion 2 In this section we will describe Project Overview LTR 20422 ---MOBY DICK, The Mobile Digital Companion 3 we notice that X.509 has been
Controlled Dicke Subradiance from a Large Cloud of Two-Level Systems Tom Bienaime,1
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
Sahlqvist theory for Hybrid Logic Opgedragen aan Dick de Jongh voor zijn 65ste verjaardag
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
Part 1: First Phase Project Overview LTR 20422 ---MOBY DICK, The Mobile Digital Companion
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
Generation of Dicke states using adiabatic passage
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.
Solar Oblateness from Archimedes to Dicke
Sigismondi, C; Sigismondi, Costantino; Oliva, Pietro
2005-01-01
The non-spherical shape of the Sun has been invoked to explain the anomalous precession of Mercury. A brief history of some methods for measuring solar diameter is presented. Archimedes was the first to give upper and lower values for solar diameter in third century before Christ; we also show the method of total eclipses, used after Halley's observative campaign of 1715 eclipse; the variant of partial eclipses useful to measure different chords of the solar disk; the method of Dicke which correlates oblateness with luminous excess in the equatorial zone.
Determination of Henry?s Law Constants Using Internal Standards with Benchmark Values
It is shown that Henry?s law constants can be experimentally determined by comparing headspace content of compounds with known constants to interpolate the constants of other compounds. Studies were conducted over a range of water temperatures to identify temperature dependence....
Federal Register 2010, 2011, 2012, 2013, 2014
2012-11-29
...Applications On October 3, 2012, Henry County, Iowa, filed an application...Tippecanoe Township, section 24, Henry County, Iowa. The sole purpose...boundary. Applicant Contact: Mr. John Pullis, Director, Henry County, Iowa, Henry County...
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
Palacios, B.; Montero, M. J.; Sevilla, M. A.; Romn, L. S.
1995-01-01
1. JB-9322 is a selective histamine H2-receptor antagonist with gastric antisecretory activity and mucosal protective properties. 2. The affinity of JB-9322 for the guinea-pig atria histamine H2-receptor was approximately 2 times greater than that of ranitidine. 3. In vivo, the ID50 value for the inhibition of gastric acid secretion in pylorus-ligated rats was 5.28 mg kg-1 intraperitoneally. JB-9322 also dose-dependently inhibited gastric juice volume and pepsin secretion. In gastric lumen-perfused rats, intravenous injection of JB-9322 dose-dependently reduced histamine-, pentagastrin- and carbachol-stimulated gastric acid secretion. 4. JB-9322 showed antiulcer activity against aspirin and indomethacin-induced gastric lesions and was more potent than ranitidine. 5. JB-9322 effectively inhibited macroscopic gastric haemorrhagic lesions induced by ethanol. Intraperitoneal injection was effective in preventing the lesions as well as oral treatment. The oral ID50 value for these lesions was 1.33 mg kg-1. By contrast, ranitidine (50 mg kg-1) failed to reduce these lesions. In addition, the protective effect of JB-9322 was independent of prostaglandin synthesis. 6. These results indicate that JB-9322 is a new antiulcer drug that exerts a potent cytoprotective effect in addition to its gastric antisecretory activity. PMID:7647984
The quintessential systematist: Henri Baulig
NASA Astrophysics Data System (ADS)
Derruau, M.
1994-11-01
The French geomorphologist Henry Baulig (1877-1962) studied with W.M. Davis between 1905 and 1911. Following this master, he espoused the theory of the geomorphic cycle but also gave an eminent role to eustatism both Quaternary glacio-eustatism and Pliocene diastrophic eustatism (i.e., the rise or fall of sea level caused by submarine tectonism). He believed that large parts of continents had remained stable since the start of the Pliocene, and that they retain undeformed remnants of ancient erosion levels. He opposed Walther Penck's Piedmonttreppen theory. He also attempted to reconstruct the polycyclic profiles of rivers and peneplain surfaces, but his method of identifying ancient flattened surfaces by statistical and graphical means never gained wide acceptance. Among Baulig's regional works, a morphological study of the Massif Cenral and a two volume, much appreciated, geography of North America are noteworthy. He has also left us the French-English-German Vocabulary of Geomorphology, which is an extraordinary work of scholarship. Baulig was sceptical of quantification and process studies, preferring to rely on perceived morphology. Specific relief forms such as sugar-loaf shaped rocky domes and inselbergs did not much interest him, but he was aware, better than sometimes stated, of climatic geomorphology. Although his rigorous, analytical, and somewhat theoretical way of arguing isolated him from some geographers who were keen on new, adventurous ideas, his work remains an outstanding model.
Xenobiotics enhance laccase activity in alkali-tolerant ?-proteobacterium JB
Singh, Gursharan; Batish, Mona; Sharma, Prince; Capalash, Neena
2009-01-01
Various genotoxic textile dyes, xenobiotics, substrates (10 M) and agrochemicals (100 g/ml) were tested for enhancement of alkalophilic laccase activity in ?-proteobacterium JB. Neutral Red, Indigo Carmine, Naphthol Base Bordears and Sulphast Ruby dyes increased the activity by 3.7, 2.7, 2.6 and 2.3 fold respectively. Xenobiotics/substrates like p-toluidine, 8-hydroxyquinoline and anthracine increased it by 3.4, 2.8 and 2.3 fold respectively. Atrazine and trycyclozole pesticides enhanced the activity by 1.95 and 1.5 fold respectively. PMID:24031313
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)
City size and the Henry George theorem under monopolistic competition
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
Exact Vacuum Solutions of Jordan, Brans-Dicke Field Equations
Sergey Kozyrev
2005-12-04
We present the static spherically symmetric vacuum solutions of the Jordan, Brans-Dicke field equations. The new solutions are obtained by considering a polar Gaussian, isothermal and radial hyperbolic metrics.
Hornecker, Eva
Published as: Daniela Petrelli, Luigina Ciolfi, Dick van Dijk, Eva Hornecker, Elena Not, Albrecht.ciolfi@shu.ac.uk Dick van Dijk | Waag Society | dick@waag.org Eva Hornecker | University of Strathclyde | eva
Global monopoles in the Brans-Dicke theory
Xin-zhou Li; Jizong Lu
2000-07-03
A gravitating global monopole produces a repulsive grativational field outside the core in addition to a solid angular deficit in the Brans-Dicke theory. As a new feature, the angular deficit is dependent on the values of \\phi_{\\infty} and \\omega, where \\phi_{\\infty} is asymptotic value of scalar field in space-like infinity and \\omega is the Brans-Dicke parameter.
Pairwise Quantum Correlations for Superpositions of Dicke States
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.
Quantum Phase Transition in a Pseudo-hermitian Dicke model
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.
Cosmological Implications of 5-dimensional Brans-Dicke Theory
Li-e Qiang; Yan Gong; Yongge Ma; Xuelei Chen
2009-10-10
The five dimensional Brans-Dicke theory naturally provides two scalar fields by the Killing reduction mechanism. These two scalar fields could account for the accelerated expansion of the universe. We test this model and constrain its parameter by using the type Ia supernova (SN Ia) data. We find that the best fit value of the 5-dimensional Brans-Dicke coupling contant is $\\omega = -1.9$. This result is also consistent with other observations such as the baryon acoustic oscillation (BAO).
Structure formation constraints on the Jordan-Brans-Dicke theory
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 Dicke parameter \\omega>120.
Baryogenesis in Brans-Dicke theory
Sietse van der Post; Tomislav Prokopec
2006-12-22
A new mechanism for baryogenesis is proposed in the context of an extended Brans-Dicke (BD) theory. We generalize the BD scalar to complex field with CP violating coupling to curvature and show that the charged BD current can be enhanced during inflationary epoch. After inflation the current decays (via tree level interactions) into the standard model particles. When the BD scalar is charged under baryon and/or lepton number, the decay produces a net baryon number. Rather generically a sufficiently large scalar current can be produced during inflation to account for the observed baryon asymmetry of the Universe. Our baryogensis scenario can in an elegant way be incorporated into a model of extended inflation.
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.
Henry Liu June 15, 2011 CURRICULUM VITAE
Levinson, David M.
. Liu, Co-PIs: D. Levinson, K. Harder Total Cost: $300,000 Duration: September 2008 August 2011 5 Cooperative Highway Research Program (NCHRP) PI: D. Gettman (Kimley Horn Inc.), Co-PIs: H. Liu (UMN), M. Abbas;Henry Liu June 15, 2011 3 Funding Agency: National Science Foundation PI: H. Liu, Co-PI: D. Levinson
ERIC Educational Resources Information Center
Hinshaw, Craig
2010-01-01
In this article, the author describes an art project inspired by Henry Moore's sculptures. This project consists of two activities. In the first activity, students select, sand and stain a wood block that would become a base for their plaster sculpture. This activity would keep the students independently engaged (classroom management) while the
Henri Matisse's "Beasts of the Sea"
ERIC Educational Resources Information Center
Graff, Robert
2010-01-01
Henri Matisse (1869-1954) was a very prolific Impressionist/Post-Impressionist artist whose longevity allowed him to produce many wonderful, brightly colored pieces of art that spanned different styles, movements and media. Elementary-school children love color and appreciate any project that does not require their work to be exact or totally
ThroopThroop -Jupiter Enrichment Henry Throop
Throop, Henry
ThroopThroop - Jupiter Enrichment Henry Throop Department of Space Studies Southwest Research of Jupiter's Atmosphere from a Supernova-Contaminated Molecular Cloud #12;Throop - Jupiter Enrichment #12;Throop - Jupiter Enrichment #12;Throop - Jupiter Enrichment Jupiter:Solar abundances Enriched by 3
Statistical Mechanics Henri J.F. Jansen
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
Susan L. Cutter, Editor JOSEPH HENRY PRESS
in the Natural Hazards and Disasters series pub- lished by the Joseph Henry Press, is derived from these two assessment follows in Chapter 2. A brief history of mapping and the spatial analysis of hazards and risks events and losses (Chapter 4). A retrospective look at trends in hazard events and losses over the past
WILLIAM SAMUEL LILLY VS THOMAS HENRY HUXLEY
Hale, Piers J.
the sciences, but because it was spreading through all aspects of Western culture, from the fiction of ?mile and Morality', Fortnightly Review (November 1886), pp. 5757, 578, 5813, 58990. Thomas Henry Huxley `Science into the cut and thrust of defending physical science from theological attack, he relished the opportunity
Transcendentalism and Henry Barnard's "School Architecture"
ERIC Educational Resources Information Center
Rothfork, John
1977-01-01
Sketches the intellectual and sociological climate that led Henry Barnard to advocate Greek Revival architecture for school buildings, takes a look at why this style and its implicit values were popular in the era between 1820-1860, and examines a few of the plans in Barnard's "School Architecture" (1838-48). (Author/RK)
Henry Ward Beecher: A Nation's Tribune.
ERIC Educational Resources Information Center
Chandler, Daniel Ross
Henry Ward Beecher was America's most prominent 19th century liberal preacher and a major spokesperson for New England Transcendentalism. His philosophy integrated four fundamental themes: the creation of a moral code based on the internalization of values and peer group pressures, the establishment of the reform ideal of the impartial nonpartisan
Dr. Henry J. Thompson is professor in the College of Agricultural Sciences and director of the Cancer Prevention Laboratory at Colorado State University in Fort Collins, Colorado. Dr. Thompson is a member of the American Association for Cancer Research and the American Society for Nutritional Sciences.
Henry Charles Lea: Jurisprudence and Civilization
Edward Peters
2010-01-01
During the same nineteenth century when the modern study of legal history got underway in Europe, from Savigny to the Codex Iuris Canonici of 1917, Henry Charles Lea (1825-1909), an ocean away and without a serious library in sight, undertook the study of several aspects of ecclesiastical and legal history that brought him into contact with canon law at virtually
Build A Comet! Dr. Henry Throop
Throop, Henry
Build A Comet! Dr. Henry Throop Planetary Science Institute Tucson,Arizona, USA SciFest Africa, March 2013 #12;Comet Basics Comets are icy snowballs.They are made of the same things the rest of the planets are made of: rock and ice, mixed with a small amount of junk and goo (organic molecules) #12;Comet
The Ideas of Henry Jenkins and Libraries
ERIC Educational Resources Information Center
Anderson, Byron
2008-01-01
Henry Jenkins, director of the Comparative Media Studies Program at the Massachusetts Institute of Technology and keynote speaker at the 2007 American Library Association's "Gaming, Learning and Libraries Symposium" in Chicago is a visionary leader in the areas of new media and media convergence. In a white paper on digital media and learning
Norbert Azuma-Dicke, IER, University of Stuttgart Poul Erik Morthorst, Ris National Laboratory
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
From: Cannon, Dick Sent: Tuesday, October 18, 2011 8:50 AM
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
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\
Two-photon spectroscopy of trapped HD+ ions in the Lamb-Dicke regime
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
ORIGINAL PAPER Tribute to Dick Post on His 90th Birthday
ORIGINAL PAPER Tribute to Dick Post on His 90th Birthday Ken Fowler ? Springer Science+Business Media, LLC 2008 Abstract Richard F. (Dick) Post, who began his fusion career in 1951, has been one scientist Ken Fowler pays tribute to Dick's multi-decade contributions. Keywords Fusion Á Magnetic mirrors
Part 1: First Phase Project Overview LTR 20422 MOBY DICK, The Mobile Digital Companion 1
Havinga, Paul J.M.
Part 1: First Phase Project Overview LTR 20422 MOBY DICK, The Mobile Digital Companion 1 MOBY DICK The Mobile Digital Companion LTR 20422 Section I: Results of the first phase 1 Introduction In the Moby Dick project we develop and define the architecture of a new generation of hand held computers
Dicke quantum spin glass of atoms and photons Philipp Strack and Subir Sachdev
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
How Sister Celine Fasenmyer and Dick Dun Shaped my Mathematical Personality Doron ZEILBERGER 1
Zeilberger, Doron
How Sister Celine Fasenmyer and Dick Du?n 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 Du?n's creative genius, while partly recognized, sure did not get the full
DICK THORNBURGH SUMMER FELLOWSHIP PROGRAM APPLICATION 2011 PLEASE TYPE OR PRINT
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
How Sister Celine Fasenmyer and Dick Duffin Shaped my Mathematical Personali* Doron ZEILBERGER1
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
Two-photon spectroscopy of trapped HD+ ions in the Lamb-Dicke regime
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
Press Release EGU Press Release 04.01 EGU Contact: Dick van der Wateren
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
Wilbur Dick Nesbit (1871-1927) Papers, 1896-1948 Series No. LIII
S ^r Wilbur Dick Nesbit (1871-1927) Papers, 1896-1948 Series No. LIII Boxes 1 - 10 Biography Wilbur Dick Nesbit was a mid-western poet, newspaper columnist, hu- morist, toast master and advertising, including those for the successful #12;Wilbur Dick Nesbit -2- musical comedy, "The Girl of My Dreams." He
DICKE COHERENT NARROWING IN TWO-PHOTON AND RAMAN SPECTROSCOPY OF THIN VAPOUR CELLS
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
Cosmological Constraints on Brans-Dicke Theory
NASA Astrophysics Data System (ADS)
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
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.
Cosmological constraints on Brans-Dicke theory.
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
Contaminant Monitoring Strategy for Henrys Lake, Idaho
John S. Irving; R. P. Breckenridge
1992-12-01
Henrys Lake, located in southeastern Idaho, is a large, shallow lake (6,600 acres, {approx} 17.1 feet maximum depth) located at 6,472 feet elevation in Fremont Co., Idaho at the headwaters of the Henrys Fork of the Snake River. The upper watershed is comprised of high mountains of the Targhee National Forest and the lakeshore is surrounded by extensive flats and wetlands, which are mostly privately owned. The lake has been dammed since 1922, and the upper 12 feet of the lake waters are allocated for downriver use. Henrys Lake is a naturally productive lake supporting a nationally recognized ''Blue Ribbon'' trout fishery. There is concern that increasing housing development and cattle grazing may accelerate eutrophication and result in winter and early spring fish kills. There has not been a recent thorough assessment of lake water quality. However, the Department of Environmental Quality (DEQ) is currently conducting a study of water quality on Henrys Lake and tributary streams. Septic systems and lawn runoff from housing developments on the north, west, and southwest shores could potentially contribute to the nutrient enrichment of the lake. Many houses are on steep hillsides where runoff from lawns, driveways, etc. drain into wetland flats along the lake or directly into the lake. In addition, seepage from septic systems (drainfields) drain directly into the wetlands enter groundwater areas that seep into the lake. Cattle grazing along the lake margin, riparian areas, and uplands is likely accelerating erosion and nutrient enrichment. Also, cattle grazing along riparian areas likely adds to nutrient enrichment of the lake through subsurface flow and direct runoff. Stream bank and lakeshore erosion may also accelerate eutrophication by increasing the sedimentation of the lake. Approximately nine streams feed the lake (see map), but flows are often severely reduced or completely eliminated due to irrigation diversion. In addition, subsurface flows can occur as a result of severe cattle grazing along riparian areas and deltas. Groundwater and springs also feed the lake, and are likely critical for oxygen supply during winter stratification. During the winter of 1991, Henrys Lake experienced low dissolved oxygen levels resulting in large fish kills. It is thought that thick ice cover combined with an increase in nutrient loads created conditions resulting in poor water quality. The Idaho Department of Health and Welfare, DEQ is currently conducting a study to determine the water quality of Henrys Lake, the sources contributing to its deterioration, and potential remedial actions to correct problem areas.
The Life and Times of Dick Ruggles: The Disappearance of the Squire's Ham and Other Village Stories
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...
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
Dynamical phase transition in the open Dicke model.
Klinder, Jens; Keler, Hans; Wolke, Matthias; Mathey, Ludwig; Hemmerich, Andreas
2015-03-17
The Dicke model with a weak dissipation channel is realized by coupling a Bose-Einstein condensate to an optical cavity with ultranarrow bandwidth. We explore the dynamical critical properties of the Hepp-Lieb-Dicke phase transition by performing quenches across the phase boundary. We observe hysteresis in the transition between a homogeneous phase and a self-organized collective phase with an enclosed loop area showing power-law scaling with respect to the quench time, which suggests an interpretation within a general framework introduced by Kibble and Zurek. The observed hysteretic dynamics is well reproduced by numerically solving the mean-field equation derived from a generalized Dicke Hamiltonian. Our work promotes the understanding of nonequilibrium physics in open many-body systems with infinite range interactions. PMID:25733892
Cosmic Evolution in Brans-Dicke Chameleon Cosmology
Mubasher Jamil; Ibrar Hussain; D. Momeni
2011-08-02
We have investigated the Brans-Dicke Chameleon theory of gravity and obtained exact solutions of the scale factor $a(t)$, scalar field $\\phi(t)$, an arbitrary function $f(\\phi)$ which interact with the matter Lagrangian in the action of the Brans-Dicke Chameleon theory and potential $V(\\phi)$ for different epochs of the cosmic evolution. We plot the functions $a(t)$, $\\phi(t)$, $f(t)$ and $V(\\phi)$ for different values of the Brans-Dicke parameter. In our models, there is no accelerating solution, only decelerating one with $q>0$. The physical cosmological distances have been investigated carefully. Further the statefinder parameters pair and deceleration parameter are discussed.
Dynamical phase transition in the open Dicke model
Klinder, Jens; Keler, Hans; Wolke, Matthias; Mathey, Ludwig; Hemmerich, Andreas
2015-01-01
The Dicke model with a weak dissipation channel is realized by coupling a BoseEinstein condensate to an optical cavity with ultranarrow bandwidth. We explore the dynamical critical properties of the HeppLiebDicke phase transition by performing quenches across the phase boundary. We observe hysteresis in the transition between a homogeneous phase and a self-organized collective phase with an enclosed loop area showing power-law scaling with respect to the quench time, which suggests an interpretation within a general framework introduced by Kibble and Zurek. The observed hysteretic dynamics is well reproduced by numerically solving the mean-field equation derived from a generalized Dicke Hamiltonian. Our work promotes the understanding of nonequilibrium physics in open many-body systems with infinite range interactions. PMID:25733892
Measurement of Dicke Narrowing in Electromagnetically Induced Transparency
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.
$?$ Parameter and Solar System constraint in Chameleon Brans Dick Theory
Khaled Saaidi; Abolhassan Mohammadi; Haidar Sheikhahmadi
2011-12-31
The post Newtonian parameter is considered in the Chameleon-Brans-Dicke frame. 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 Chameleon-Brans-Dicke model can satisfy the solar system constraint and gives us an $\\omega$ parameter of order $10^4$, which is in comparable to the constraint which has been indicated in {\\cite{17-a}}.
Level statistics of a pseudo-Hermitian Dicke model
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.
Inflation and dark energy from the Brans-Dicke theory
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 $\\omega$.
Entanglement detection in the vicinity of arbitrary Dicke states
L. -M. Duan
2011-07-26
Dicke states represent a class of multipartite entangled states that can be generated experimentally with many applications in quantum information. We propose a method to experimentally detect genuine multipartite entanglement in the vicinity of arbitrary Dicke states. The detection scheme can be used to experimentally quantity the entanglement depth of many-body systems and is easy to implement as it requires to measure only three collective spin operators. The detection criterion is strong as it heralds multipartite entanglement even in cases where the state fidelity goes down exponentially with the number of qubits.
Experimental entanglement of a six-photon symmetric Dicke state
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.
Brans-Dicke theory: Jordan vs Einstein Frame
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.
Henry Shue on Basic Rights: A Defense
Jordan Kiper
In light of the many recent criticisms of Henry Shue's philosophy, this article provides a defense of Shue's philosophical\\u000a argument for basic rights. The author demonstrates that the latest criticisms made by Thomas Pogge, Michael Payne, and Andrew\\u000a Cohen misconstrue Shue's position, and therefore fail to overturn the soundness of Shue's argument. Against those who contend\\u000a that basic rights demand
Henri Laborit and the inhibition of action
Kunz, Edward
2014-01-01
Henri Laborit was one of the founders of modern neuropsychopharmacology, having discovered, or participated in, the discovery of chlorpromazine, gamma-OH, clomethiazole, and minaprine. He also put forward a theory regarding the necessity of counteracting the negative consequences of defense mechanisms during anesthesia or behavioral inhibition. The scope of his work covers neurophysiology, pharmacology, psychiatry, and psychosomatics. His independence of spirit meant that most of his research was not done within university settings. PMID:24733976
Author! Author! The Gallant Children's Author: Dick King-Smith
ERIC Educational Resources Information Center
Brodie, Carolyn S.
2005-01-01
This column presents a brief biography of Dick King-Smith. Born on March 27, 1922 and raised in Gloucestershire, England, he grew up with animals of all kinds. King-Smith was a farmer for twenty years and then became a school teacher. He was also a soldier during wartime, a traveling salesman, shoe factory worker, and television presenter. He
Vacuum less global monopole in Brans-Dicke theory
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.
Tropical mountain cradles of dry forest diversity Christopher W. Dick*
Bermingham, Eldredge
Tropical mountain cradles of dry forest diversity Christopher W. Dick* and S. Joseph Wright be used to infer the age of a biome? In the neighboring rain forest biome, for example, major clades have is apparently less than 6 million years old (6). Inga shares the rain forest with trees from several families
Intuitionistic Logic Nick Bezhanishvili and Dick de Jongh
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
TEACHING "MOBY DICK," A METHOD AND AN APPROACH.
ERIC Educational Resources Information Center
JOSEPHS, LOIS
"MOBY DICK" IS SINGULARLY APPROPRIATE FOR HIGH SCHOOL STUDENTS IN ITS PHILOSOPHICAL, PSYCHOLOGICAL, AND SOCIAL EMPHASIS. HOWEVER, TO GUIDE THE STUDENTS INTO THE THEMATIC INTRICACIES OF THE WORK, THE TEACHER MUST USE A CAREFULLY PLANNED, INDUCTIVE APPROACH THAT DEMANDS CLOSE TEXTUAL STUDY IN CLASS. ALTHOUGH EACH TEACHER SHOULD CONCENTRATE ON THE
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)
pidmiologie 210 A. Grolla, A. Lucht, D. Dick et al.
Paris-Sud XI, Universit de
pidmiologie 210 A. Grolla, A. Lucht, D. Dick et al. Ebola virus circulation in Africa: a balance between cli- nical expression and epidemiological silence. Rsum : Circulation du virus Ebola en Afrique pidmies, on connat encore peu de choses sur le virus Ebola (VEBO), sa transmission reste indtermine et
Global Monopoles in Brans-Dicke Theory of Gravity
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.
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
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)
The Life and Times of Dick Ruggles: Gamekeeping Tales
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...
Composite spherically symmetric configurations in Jordan-Brans-Dicke theory
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.
Composite wormholes in vacuum Jordan-Brans-Dicke theory
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.
Embedding Brans-Dicke gravity into electroweak theory
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.
The Life and Times of Dick Ruggles: Lord Sainsbury's Gardener
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...
The Life and Times of Dick Ruggles: Village Life
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...
Professor Henry, Mr. Faraday, and the Hunt for Electromagnetic Induction
NASA Astrophysics Data System (ADS)
Moyer, Albert E.
1997-04-01
On different sides of the Atlantic but about the same time, Michael Faraday and Joseph Henry announced success in a quest that had preoccupied the scientific community for a decade: coaxing electricity from magnetism. "Mutual induction," what Faraday and Henry had identified in the early 1830s, would turn out to be not only a foundational concept in the physics of electricity and magnetism but also the principle behind the technology of electrical transformers and generators--two mainstays of industrialization. Although Faraday's breakthrough in London and Henry's in Albany might appear to be classic examples of "independent discovery," they were not. The two natural philosophers shared a similar orientation toward their research and, moreover, a distinctive laboratory instrument: Henry's new, powerful electromagnet. Thus, the story of Henry's and Faraday's search for induction illuminates not only the workings of Victorian science but also the crucial part that an instrument--the unadorned hardware--can play in scientific inquiry. Albert Moyer takes this story from his biography of Joseph Henry that Smithsonian Institution Press is about to publish in commemoration of the 200th anniversary of Henry's birth. The biography focuses on Henry's early and middle years, 1797-1847, from his emergence as America's foremost physical scientist to his election as the Smithsonian Institution's first director.
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.
West Harlem Walk (Hudson River Valley Greenway) beneath Henry Hudson ...
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
Rev. of Henry Miller, by George Wickes
Levine, Stuart
1966-01-01
70 Midcontinent American Studies Journal T h e U n i v e r s i t y of M i n n e s o t a P a m p h l e t s on A m e r i c a n W r i t e r s (Paper only) HENRY MILLER. By George Wickes. Minneapolis: University of Minnesota Press . 1966. $.65... be summarized, nor his career adequately surveyed. Miller is, at his best, as Wickes says, a writer of attitudes, not ideas, but the attitudes are not consistent. Neither are the ideas which keep intruding. As for the career, either Miller didn't cooperate...
A critical bibliography of Dr. Henry Sacheverell
Madan, F. F. (Francis Falconer); Speck, W. A. (William Arthur)
1978-01-01
given at the Bar of the House of Commons, upon the complaint of Sir John Pac\\ington against William Bishop of Wor cester and Mr. Lloyd his son, 1702. On p. 11 appears a letter of Lloyd's dated 29 July 1702 denying his authorship of The Character of a... he used towards the end of it, that wellwishcrs to die Church should "hang out the bloody flag and banner of defiance" was long remembered. William Bisset was to call Sacheverell "the bloody flag officer" in 1709. 1 June 1702. Henry Sacheverell...
Levinson, David M.
B, Accepted. 2. Wu, X., Liu, H., Gettman, D. (2010) Identification of Oversaturated Intersections1 Biographical Sketch for Henry Liu Dr. Henry Liu is currently an Assistant Professor of Civil. On these topics, he has published more than 40 articles in peer-reviewed journals. Dr. Liu a member
Levinson, David M.
, 45(10), 1768-1786. 3. Wu, X., Liu, H., Gettman, D. (2010) Identification of Oversaturated1 Dr. Henry X. Liu Dr. Henry Liu is an Associate Professor in the Civil Engineering Department in the prestigious Transportation Research journals. Dr. Liu's research has led to the development of patent
Nonclassical effects in a highly nonlinear generalized homogeneous Dicke model
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.
Brans-Dicke theory of gravity with torsion: A possible solution of the $?$-problem
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.
Pairwise Quantum Correlations for Superpositions of Dicke States
Xi, Zhengjun; Li, Yongming; Wang, Xiaoguang
2011-01-01
Using the concept of quantum discord (QD), we study the quantum correlation for a class of two-qubit X states with exchange and parity symmetries, whose density matrices have complex off-diagonal elements. We derive an upper bound of the QD, which is independent of the arguments of the complex off-diagonal elements of the reduced two-qubit density matricies. Moreover, for the two-qubit X states obtained from Dicke states and their superposition states, we obtain a compact expression of the QD by numerical check. Finally, we 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 (EoF), which is a quantum entanglement measure.
Wet dark fluid in Brans-Dicke theory
Sunil K. Tripathy; Dipanjali Behera; Bivudutta Mishra
2014-12-10
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.
Interacting holographic dark energy in Brans-Dicke theory
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.
Preparation of Dicke States in an Ion Chain
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.
Against Accumulation: Moby-Dick, Mason & Dixon, and Atlantic Capitalism
Scott K. Borchert
2008-01-01
This thesis examines the question of what it means to think about a text as Atlantic literature. I consider two novels, Melvilles Moby-Dick and Pynchons Mason & Dixon, in their relation to the Atlantic cycle of capital accumulation. I borrow this term from Ian Baucom, who, drawing on the work of Giovanni Arrighi, argues that the period extending from the
Superconducting cosmic string in Brans-Dicke theory
A. A. Sen
1999-05-25
In the present work, the gravitational field of superconducting cosmic string has been investigated in the context of Brans-Dicke theory of gravity. We have presented two kind of solutions for the spacetime in the far field zone of the string. When the B-D scalar field is switched off, one of the solutions reduces to the solution earlier obtained by Moss and Poletti in General Relativity.
Non static local string in Brans-Dicke theory
A. A. Sen
1998-03-09
A recent investigation shows that a local gauge string with a phenomenological energy momentum tensor, as prescribed by Vilenkin, is inconsistent in Brans-Dicke theory. In this work, it has been shown that such a string is indeed consistent if one introduces time dependences in the metric. A set of solutions of full nonlinear Einstein's equations for the interior region of such a string are presented.
Ricci Dark Energy in Brans-Dicke theory
Chao-Jun Feng
2008-06-04
A holographic dark energy from Ricci scalar curvature called Ricci dark energy was proposed recently. In this model the future event horizon area is replaced by the inverse of the Ricci scalar curvature. We study the evolution of equation of state of the Ricci dark energy and the transition from decelerated to accelerated expansion of the universe in the Brans-Dicke theory, which is a natural extension of general relativity. We find that the current acceleration of our universe is well explained.
Structure scalars and anisotropic spheres in Brans-Dicke gravity
NASA Astrophysics Data System (ADS)
Sharif, M.; Manzoor, Rubab
2015-01-01
This paper investigates self-gravitating spherically symmetric fluid models in Brans-Dicke gravity by incorporating structure scalars. We obtain ten scalar quantities using orthogonal splitting of the Reimann tensor and write down the set of governing equations in terms of these scalars. We determine inhomogeneity factors and conclude that inhomogeneity is a necessary condition for the resultant fluid models. Finally, we explore static inhomogeneous anisotropic spherical solutions with the help of these structure scalars.
Isotropization in Brans-Dicke-Bianchi type-V
NASA Astrophysics Data System (ADS)
Guzman, Enrique
1992-05-01
Attention is given to general vacuum solutions for Bianchi type-V in Brans-Dicke theory. In one solution, the inflationary behavior is found. It is shown that, for the special gamma = 0 case there is no antigravity, which disagrees with other physical solutions found in previous studies. The present method can be used to obtain the corresponding general Bianchi type-V solution in the general relativity theory first advanced by Joseph (1966).
Brans-Dicke Theory in Anisotropic Model with Viscous Fluid
Shuvendu Chakraborty; Ujjal Debnath
2011-09-24
In this paper we have considered an anisotropic space-time model of the Universe in presence of Brans-Dicke (BD) scalar field $\\phi$, causal viscous fluid and barotropic fluid. We have shown that irrespective of fluid the causality theory provides late time acceleration of the Universe. If the deceleration occurs in radial direction and acceleration occurs in transverse direction then the anisotropic Universe will accelerate for a particular condition of the power law representation of the scale factors.
Digital Quantum Rabi and Dicke Models in Superconducting Circuits
Mezzacapo, A.; Las Heras, U.; Pedernales, J. S.; DiCarlo, L.; Solano, E.; Lamata, L.
2014-01-01
We propose the analog-digital quantum simulation of the quantum Rabi and Dicke models using circuit quantum electrodynamics (QED). We find that all physical regimes, in particular those which are impossible to realize in typical cavity QED setups, can be simulated via unitary decomposition into digital steps. Furthermore, we show the emergence of the Dirac equation dynamics from the quantum Rabi model when the mode frequency vanishes. Finally, we analyze the feasibility of this proposal under realistic superconducting circuit scenarios. PMID:25500735
Accurate numerical solution to the finite-size Dicke model
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.
Digital quantum Rabi and Dicke models in superconducting circuits.
Mezzacapo, A; Las Heras, U; Pedernales, J S; DiCarlo, L; Solano, E; Lamata, L
2014-01-01
We propose the analog-digital quantum simulation of the quantum Rabi and Dicke models using circuit quantum electrodynamics (QED). We find that all physical regimes, in particular those which are impossible to realize in typical cavity QED setups, can be simulated via unitary decomposition into digital steps. Furthermore, we show the emergence of the Dirac equation dynamics from the quantum Rabi model when the mode frequency vanishes. Finally, we analyze the feasibility of this proposal under realistic superconducting circuit scenarios. PMID:25500735
Antigravity in F( R) and Brans-Dicke theories
NASA Astrophysics Data System (ADS)
Oikonomou, V. K.; Karagiannakis, N.
2014-12-01
We study antigravity in F( R)-theory originating scalar-tensor theories and also in Brans-Dicke models without cosmological constant. For the F( R) theory case, we obtain the Jordan frame antigravity scalar-tensor theory by using a variant of the Lagrange multipliers method and we numerically study the time dependent effective gravitational constant. As we shall demonstrate in detail by using some viable F( R) models, although the initial F( R) models have no antigravity, their scalar-tensor counterpart theories might or not have antigravity, a fact mainly depending on the parameter that characterizes antigravity. Similar results hold true in the Brans-Dicke model, which we also studied numerically. In addition, regarding the Brans-Dicke model we also found some analytic cosmological solutions. Since antigravity is an unwanted feature in gravitational theories, our findings suggest that in the case of F( R) theories, antigravity does not occur in the real world described by the F( R) theory, but might occur in the Jordan frame scalar-tensor counterpart of the F( R) theory, and this happens under certain circumstances. The central goal of our study is to present all different cases in which antigravity might occur in modified gravity models.
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.
Battling for Liberty: Tecumseh's and Patrick Henry's Language of Resistance
NSDL National Science Digital Library
Traci Gardner - Read, Write, Think
2012-08-01
In this lesson, students will compare and contrast the "Give Me Liberty or Give Me Death!" speech by Patrick Henry with two speeches by Chief Tecumseh of the Shawnee. This lesson extends the study of Patrick Henry's speech to demonstrate the ways Native Americans also resisted oppression through rhetoric. By examining these three speeches, students can develop a new respect for the Native Americans' politically effective and poetic use of language. Students are challenged to recognize the rhetorical devices used by both men and their own emotional responses to the two speeches, in addition to translating a portion of Henry's speech to emulate the style of Tecumseh.
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
Havinga, Paul J.M.
Minimizing energy consumption for handheld computers in Moby Dick Paul J.M. Havinga, Gerard J to system services and applications. The Moby Dick project [8] is a joint european project (Esprit Long Term
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
Gilles Deleuze and Michel Henry: Critical Contrasts in the Deduction of Life as Transcendental
James Williams
2008-01-01
To address the theological turn in phenomenology, this paper sets out critical arguments opposing the theist phenomenology\\u000a of Michel Henry and Gilles Deleuzes philosophy of the event. Henrys phenomenology has been overlooked in recent commentaries\\u000a compared with, for example, Jean-Luc Marions work. It will be shown here that Henrys philosophy presents a detailed novel\\u000a turn in phenomenology structured according to
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
Kim, Su Young; Jin, Mi Ra; Chung, Chang Ho; Yun, Yeoung-Sang; Jahng, Kwang Yeop; Yu, Kang-Yeol
2015-04-01
Biosorption of heavy metals and dyes is a promising technology that involves the removal of toxic metals from industrial wastes. The present study aims to screen the bacterial strains isolated from soils and polluted pond for their potential biosorption of both cationic dye and cadmium. Bacillus catenulatus JB-022 strain removed 58% and 66% of cationic basic blue 3 (BB3) and cadmium (Cd(II)) at the respective concentrations of 2000mg/L and 150mg/L. The biosorption equilibrium data were well fitted by the Langmuir adsorption isotherm, and the kinetic studies indicated that the biosorption followed the pseudo-second-order model. The biosorption kinetics showed that the equilibrium was reached within 10min and 5min for BB3 and Cd(II), respectively. According to the Langmuir model, the maximum uptakes of BB3 and Cd(II) by the JB-022 biomass were estimated to be 139.74 and 64.28mg/g, respectively. To confirm the surface morphology and functional groups, field emission scanning electron microscope, energy-dispersive X-ray spectrometer, X-ray diffraction, and Fourier transform infrared spectroscopy analyses were carried out, and the results revealed that the biomass of JB-022 has carboxyl and phosphonate groups as potential surface functional groups capable of binding to cationic pollutants. In conclusion, B. catenulatus JB-022 is proposed as an excellent biosorbent with potentially important applications in removal of cationic pollutants from wastewaters. PMID:25454694
Ranger Robot J.B. Cortell, B. Hendriksen, J.G.D. Karssen, A. Ruina,
Ruina, Andy L.
to build better service and entertainment robots and prosthetic devices. Builders of most of the well known1 Ranger Robot J.B. Cortell, B. Hendriksen, J.G.D. Karssen, A. Ruina, Abstract--The Ranger Robot, the Cornell Ranger walked a world record distance of 9 kilometers. It is the first walking robot to walk
doi:10.1128/JB.01628-09. J. Bacteriol. 192(11):2852-2860.Proteomics.
Clemmer, David E.
spectrometry/mass spectrometry (LC-MS/MS) analyses of Chlamydia trachomatis serovar L2 434/Bu EB, COMCdoi:10.1128/JB.01628-09. J. Bacteriol. 192(11):2852-2860.Proteomics. Membrane Complex Proteins. Proteomics Complex Proteins by Differential Outer Membranetrachomatis ChlamydiaIdentification of http
Multimodal Emotion Recognition Sanaul Haq and Philip J.B. Jackson
Jackson, Philip JB
Multimodal Emotion Recognition Sanaul Haq and Philip J.B. Jackson University of Surrey, UK Abstract emotion or affect. This chapter presents an overview of research efforts to classify emotion using different modalities: audio, visual and audio-visual combined. Theories of emotion provide a framework
Gntique environnementale et pigntique la rhabilitation de J.B. Lamarck.
Boyer, Edmond
-La- Rousse : France (2009)" #12;2 Jean-Baptiste Lamarck (1744-1829) Jean-Baptiste Pierre Antoine de Monet1 Gntique environnementale et pigntique ou la rhabilitation de J.B. Lamarck. Bernard David (1), Georges Cohen (1), Jean-Paul Dessaint (2). Nous remercions les auteurs de cet article d'avoir autoris la
James E. Smith J.B. Fuqua Professor of Business Administration
Reif, John H.
James E. Smith J.B. Fuqua Professor of Business Administration Ph.D.Stanford University, 1990 James E. Smith is a Professor in the Decision Sciences area at the Fuqua School of Business at Duke University. He teaches courses in probability and statistics and decision modeling. Professor Smith
The tumor promoting effect of lime-piper betel quid in JB6 cells.
Lin, Ming-Hsun; Chou, Fen-Pi; Huang, Hui-Pei; Hsu, Jeng-Dong; Chou, Ming-Yung; Wang, Chau-Jong
2003-11-01
Betel quid chewing is a general behavior in Taiwan, India, southeastern Asian and South Africa. In this study, microculture tetrazolium test (MTT) showed that the extract of lime-piper betel quid (LPB) (1.0-20 mg/ml) was toxic to JB6 cells. Cells exposed of LPB (0.1, 0.5, 1.0 mg/ml) for 7 days resulted in changes in cytomorphology with characteristics of carcinogenesis. With a long-term treatment (approximately 30 days) of low doses of LPB (1, 5, 10 microg/ml), the production of H2O2 and the activity of myeloperoxidase (MPO) and ornithine decarboxylase (ODC) were increased in JB6 cells. Cell cycle analysis showed a decrease in the G1 phase and an accumulation in the S phase 48 h after LPB treatment. When treating with 0.5 mg/ml LPB for 15 days as a promoter, type III foci were formed in the JB6 culture. These results demonstrated the tumor promotional effect of LPB in JB6 cells. PMID:12962998
A GIS-based Hydraulic Bulking Factor Map for New Mexico Gallegos, J.B.1
Cal, Mark P.
1 A GIS-based Hydraulic Bulking Factor Map for New Mexico Gallegos, J.B.1 ; Richardson, C design, the bulking factor provides for an increased hydraulic capacity for culvert sizing under sediment of hydraulic structures (bridge or culvert) that intersect a perennial or ephemeral waterway requires
Open maps between Knaster continua Carl Eberhart, J.B. Fugate, and Shannon Schumann
Kentucky, University of
Open maps between Knaster continua Carl Eberhart, J.B. Fugate, and Shannon Schumann Department #12; 1 Introduction Following the notation of J.W. Rogers [10], for each positive integer n let w n by many authors, including J. W. Rogers [10], and W. Debski [6]. In [10], Rogers shows that each
Open maps between Knaster continua Carl Eberhart, J.B. Fugate, and Shannon Schumann
Kentucky, University of
Open maps between Knaster continua Carl Eberhart, J.B. Fugate, and Shannon Schumann Department;1 Introduction Following the notation of J.W. Rogers 10], for each positive integer n let wn : I = 0 1] ! I studied by many authors, including J. W. Rogers 10], and W. Debski 6]. In 10], Rogers shows that each
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....
The Writings of Henry D. Thoreau
NSDL National Science Digital Library
Henry David Thoreau is widely considered one of the most important persons in the history of American letters in addition to an international reputation as a naturalist, philosopher, and author. This particular website serves as both a source of information about the authorized Thoreau Edition of his complete works (which was founded in 1966) and the Thoreau Project, which is located at Northern Illinois University, and which is supported by the National Endowment for the Humanities. On the site, visitors can learn about the life and times of Thoreau, read a series of reflections on his book, Walden, and learn about future volumes in the Thoreau Edition. The section dedicated to Thoreau's various writings is quite delightful, as visitors can view original samples of his handwriting, peruse selections from his celebrated journal (which he kept from 1837 to 1861), and view a complete list of his letters, which he composed from 1835 to 1862.
The death of Henry II of France.
Faria, M A
1992-12-01
On June 30, 1559, King Henry II of France (1519-1559), against the advice of his court ministers, participated in a fateful joust. The wooden lance of his younger opponent pierced the King's headgear, shattered into fragments, and penetrated his right orbit and temple. The King survived for 11 days following the mortal wound and was treated by two of the most distinguished physicians of the Renaissance: Ambroise Par (1510-1590), the master surgeon, and Andreas Vesalius (1514-1564), the great anatomist. The unfortunate event, the nature of the injury, and the medical consultation between these eminent physicians should all be of interest to neurosurgeons. The historical consequences of this event are briefly reviewed. PMID:1432144
Obituary: Henry Albers (1925-2009)
NASA Astrophysics Data System (ADS)
Chromey, Fred
2011-12-01
Henry Albers, professor of astronomy at Vassar College for over thirty years, died March 29, 2009, in Fairhope, Alabama. For his work at Vassar, where he held the Maria Mitchell Chair, Albers received the first Maria Mitchell Women in Science Award for his inspiration of women astronomers. He said "In the final analysis it is the students who bring the joy into teaching." As a professional astronomer, Albers did observational work on Galactic structure in the southern Milky Way, and on the structure of the Magellanic Clouds. In retirement, Albers published Maria Mitchell - A Life in Journals and Letters, the firsthand account of America's first woman astronomer. Albers's research was on photographic near-infrared spectroscopy of red giant stars in the southern Milky Way, some proper motion studies, and on the structure of the Magellanic Clouds. A series of seven NSF grants supported his six trips to Chile to make spectroscopic observations, as well as his sabbatical collaborations at Minnesota, Leiden, and the Royal Observatory in Edinburgh. Henry Albers arrived at Vassar in 1958, to find an astronomy program that had been recently absorbed by the physics department, and that was suffering neglect after the retirement of Maud Makemson. For the next 31 years, with incredible energy -- he sometimes taught seven courses a year -- he built the astronomy program into one double in size (from one to two tenure lines), whose th century facilities have been replaced with a st century observatory. For a remarkable stretch of 20-some-years, Albers and physicist Bob Stearns, with considerable grace, alternated chairmanship of the joint department of physics and astronomy. Henry Albers was a devoted citizen of Vassar College and an enthusiastic participant in the process of faculty governance at that institution. He would have been the first to concede that his enthusiasm was sometimes excessive, and that his contributions at faculty meetings occasionally failed to move the discussion forward. Before more than one meeting, he was known to make a note to himself on his copy of the agenda, which read, in large block letters: "shut up." Fortunately, Albers was seldom able to repress his concern for the College or his dedication to its improvement. He served on all major committees and most minor ones as well. For example, he chaired a committee that eventually got telephones in faculty offices, another that lobbied for establishment of an academic computing center, and another that constructed Vassar's system of post-tenure review of senior faculty. It was Henry Albers who introduced the motion on the floor of the faculty, which passed by a vote of 100 to 2, moving that Vassar College accept coeducation. Albers was a caring mentor and although fundamentally compassionate, had a somewhat prankish sense of humor - unfailingly directed at the most pompous targets in sight. Although deeply dedicated to the College, Albers had an admirable ability to disengage from his life at Vassar. He regularly spent college breaks as the resident astronomer on cruise ships. Every May, he would celebrate his last class by sharing a jug of wine in the faculty commons with his regular lunchtime group. After retiring in 1989, he continued his hobbies of gardening, painting, and choral singing, but also immediately began work as a math and science volunteer in the local public schools on Cape Cod. He completed his final scholarly project, his edition of the Letters and Journals of Maria Mitchell, in 2002.
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
Fehske, Holger
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
23. Henry Whitehead place in Cades Cove looking ESE. ...
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
Prototyping Hybrid Musical Interactions on Tablet Devices Henri Palleis
Prototyping Hybrid Musical Interactions on Tablet Devices Henri Palleis Ludwig interactions on tablet devices that combine tangible, touch and gestural input. Existing low the rapid exploration of hybrid musical interaction concepts on tablet devices with capacitive touchscreens
8. Historic American Buildings Survey. Photographed by Henry F. Withey, ...
8. Historic American Buildings Survey. Photographed by Henry F. Withey, September, 1936 SOUTH- EAST FACADE OF SOUTH-WEST WING - William G. Dana House, Guadalupe Road, Nipomo, San Luis Obispo County, CA
Stochastic modeling of spreading cortical Henry C. Tuckwell
such as stroke and migraine [11, 14, 25, 27, 31]. There is Henry C. Tuckwell Max Planck Institute for Mathematics or coincides with the aura associated with migraine in human visual cortex [17]. The characteristics of SD
5. Historic American Buildings Survey Photographed by Henry F. Withey ...
5. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SMITHY AND SOAP FACTORY (LOOKING SOUTH) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA
7. Historic American Buildings Survey Photographed by Henry F. Withey ...
7. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SOAP FACTORY (S. W. Side) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA
2. Historic American Buildings Survey Photographed by Henry F. Withey ...
2. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF FOUNTAIN, SMITHY AND SOAP FACTORY (LOOKING EAST) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA
8. Historic American Buildings Survey Photographed by Henry F. Withey ...
8. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SOAP FACTORY FROM EAST CORNER. - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA
James McHenry, MD: physician, patriot, politician and poet.
Spiegel, Allen D; Kavaler, Florence
2003-08-01
James McHenry emigrated from Ireland to the American colonies in 1771. He studied medicine with Dr. Benjamin Rush in Philadelphia and immediately volunteered as an Army surgeon when the Revolutionary War began. After serving in the medical department in Massachusetts, New York and at Valley Forge in Pennsylvania, he became an aide to General George Washington and subsequently an aide to the Marquis de Lafayette. President Washington appointed McHenry Secretary of War and he continued in that post under president John Adams. While Secretary, he revised military regulations, established a professional standing Army, pacified the Indians, enlarged the naval forces, organized the armed forces under civilian authority and initiated plans for a military academy. Baltimore's Fort Whetstone was renamed Fort McHenry in his honor. During the War of 1812, Fort McHenry gained fame as the birthplace of the national anthem of the United States. PMID:12856797
2. Historic American Buildings Survey Photographed by Henry F. Withey ...
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
8. Historic American Buildings Survey Photographed by Henry F. Withey ...
8. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 SACRISTRY WINDOW, NORTH ELEVATION (EXTERIOR) - Mission San Luis Obispo de Tolosa, 782 Monterey Street, San Luis Obispo, San Luis Obispo County, CA
Liberty Mutual Insurance Lisa Henry, Liberty Mutual Insurance
Liblit, Ben
Liberty Mutual Insurance Lisa Henry, Liberty Mutual Insurance Behavior Based Interviewing #12;Liberty Mutual Insurance Liberty Mutual Insurance "...helping people live safer, more secure lives by the National Association of Insurance Commissioners. #12;Liberty Mutual Insurance Information Technology: More
A D-dimensional Heckmann-like solution of Jordan-Brans-Dicke theory
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.
Role of the Brans-Dicke scalar in the holographic description of dark energy
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 $w_{\\Lmd} =-1$.
2013, . 27, . 1?? BRANS-DICKE SCALAR-TENSOR THEORY OF
Kreinovich, Vladik
2013, . 27, . 1?? 000.000 BRANS-DICKE SCALAR-TENSOR THEORY OF GRAVITATION MAY EXPLAIN TIME, we show that the Brans-Dicke Scalar-Tensor Theory of Gravitation, one of the most widely used equations describ- ing physical fields like electromagnetism or gravitation. As a result, if we start
, this modification is the sum of a term due to the Doppler effect, and another term that is the "recoil energy" (seeResonances of the confined hydrogeno¨id ion and the Dicke effect in non-relativistic quantum orders in the coupling parameters is given. This analysis is related to the Lamb-Dicke effect. Contents 1
Ecology of the Cutthroat Trout in Henrys Lake, Idaho
Robert B. Irving
1955-01-01
Henrys Lake, a 6,500-acre reservoir at the elevation of 6,472 feet in eastern Idaho, has a maximum depth of 21 feet and an average depth of 12 feet. Seasonal variation of weather and shallow, fertile waters are the major environmental factors that influence the Henrys Lake biotic community. Phytoplankton is abundant and composed primarily of blue-green algae and cladocerans and
P. Gert-Jan de Maagd; A. Opperhuizen; D. T. H. M. Sijm; D. T. E. M. ten Hulscher; H. van den Heuvel
1998-01-01
Aqueous solubilities, n-octanol\\/water partition coefficients (K{sub ow}S), and Henry`s law constants were determined for a range of polycyclic aromatic hydrocarbons (PAHs) using a generator-column, slow-stirring, and gas-purge method, respectively. The currently obtained data were compared to available literature data. For seven of the PAHs no K{sub ow}S previously were determined with the slow-stirring method. For four of the PAHs the
ExcellentSwimmers,forJB's60birthday.AntonioDeSimone,SISSA(Trieste,ITALY)1 AntonioDeSimone
Eilbeck, Chris
ExcellentSwimmers,forJB's60°birthday.AntonioDeSimone,SISSA(Trieste,ITALY)1 AntonioDeSimone SISSA InternationalSchoolforAdvancedStudies Trieste,Italy F.Alouges,ADS,A.Lefebvre,OptimalstrokesforlowReswimmers:anexample J.NonlinearSci,18,277-302(2008) #12;ExcellentSwimmers,forJB's60°birthday.AntonioDeSimone,SISSA(Trieste,ITALY
Interacting HDE and NADE in Brans-Dicke Chameleon Cosmology
Ahmad Sheykhi; Mubasher Jamil
2010-12-21
Motivated by the recent work of one of us [1], we generalize this work to the case where the pressureless dark matter and the holographic dark energy do not conserve separately but interact with each other. We investigate the cosmological applications of interacting holographic dark energy in Brans-Dicke theory with chameleon scalar field which is non-minimally coupled to the matter field. We find out that in this model the phantom crossing can be constructed if the model parameters are chosen suitably. We also perform the study for the new agegraphic dark energy model and calculate some relevant cosmological parameters and their evolution.
PBS Online-Nature: Sperm Whales: The Real Moby Dick
NSDL National Science Digital Library
Many people have heard of Herman Melville's famous character Moby Dick, but the real-life experiences of sperm whales are less commonly known. This PBS website explores the world of sperm whales, and provides visitors with an introductory look at these amazing animals. The site features an interview with whale researcher Jonathan Gordon and a multimedia presentation that briefly discusses the biology, social structure, and habits of sperm whales. Other online and print resources are listed, as well as information about ordering the companion video. This site also links to the NATURE Puzzles & Fun page with multimedia games centered on a variety of different animals.
Critical Property of Geometric Phase in the Dicke Model
Gang Chen; Juqi Li; J. -Q. Liang
2006-08-28
We obtain the ground-state energy level and associated geometric phase in the Dicke model analytically by means of the Holstein-Primakoff transformation and the boson expansion approach in the thermodynamic limit. The non-adiabatic geometric phase induced by the photon field is derived with the time-dependent unitary transformation. It is shown that the quantum phase transition characterized by the non-analyticity of the geometric phase is remarkably of the first-order. We also investigate the scaling behavior of the geometric phase at the critical point, which can be measured in a practical experiment to detect the quantum phase transition.
Dick Dalitz: Examples of His Contributions to Particle Physics
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.
Equilibration and macroscopic quantum fluctuations in the Dicke model
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.
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.
Equilibration and macroscopic quantum fluctuations in the Dicke model
NASA Astrophysics Data System (ADS)
Altland, Alexander; Haake, Fritz
2012-07-01
We discuss the unitary quantum dynamics of the Dicke model (spin and oscillator coupled). A suitable quasi-probability 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 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.
Fighting desires: Henry Miller's Queer Tropic.
Hardin, Michael
2002-01-01
"Fighting Desires: Henry Miller's Queer Tropic" is an investigation of Tropic of Cancer that investigates the deeply repressed homoerotic desire that periodically surfaces. This reading is dependent upon an interpretation of Eve Sedgwick that proposes male sexuality as a continuum. By looking at the nature of the male-male relationships, as well as the lack of emotion and presence in the male-female relationships, I will show that the most intimate relationships are between men, and that these relationships are expressed through the telling of stories about (heterosexual) sex; this is the function of women within the novel: one has sex with a woman, not for the pleasure that the act brings, but for the pleasure that the recounting of the story to other men brings. Furthermore, I will look at Miller's use of puns within the novel and how they also contribute to a homoerotic reading. None of this is to argue that Miller was not homophobic and sexist--Miller very clearly was--the purpose of this essay is to show the complex nature of sexuality, even within a protagonist who asserts a very defined heterosexuality. PMID:12066987
Embedding, Serial Sectioning and Staining of Zebrafish Embryos Using JB-4 Resin
Sullivan-Brown, Jessica; Bisher, Margaret E.; Burdine, Rebecca D.
2011-01-01
Histological techniques are critical for observing tissue and cellular morphology. Here, 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 (H&E), and show how to couple these stains with whole-mount RNA in situ hybridization. We also describe how to maintain and visualize immunofluorescence and GFP signals in JB-4 resin. The protocol we outline from embryo preparation, embedding, sectioning and staining to visualization - can be accomplished in three days. 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
Dynamics and cosmological constraints on Brans-Dicke cosmology
Hrycyna, Orest; Szydlowski, Marek
2014-01-01
We investigate observational constraints on Brans-Dicke cosmological model using observational data coming form distant supernovae type Ia, the Hubble function $H(z)$ measurements, information coming from Alcock-Paczy{\\'n}ski test and baryon acoustic oscillations (BAO). Our analysis is based on modified Friedmann function resulting form dynamical investigations of Brans-Dicke cosmology in vicinity of de Sitter state. Qualitative theory of dynamical systems enables us to obtain three different behaviors in vicinity of this state. We find : for a linear approach to the de Sitter state $\\omega_{\\textrm{BD}}=-0.8681^{+0.1407}_{-0.0948}$ with the best fit value $\\omega_{\\textrm{BD}}=-0.9782$, while for an oscillatory approach to the de Sitter state we obtain $\\omega_{\\textrm{BD}}=-1.2219^{+0.1478}_{-0.0450}$ with the best fit value $\\omega_{\\textrm{BD}}=-1.0646$, while for the transient de Sitter state represented by a saddle type critical point we find $\\omega_{\\textrm{BD}}=-1.9499^{+0.0988}_{-0.6576}$ with the b...
Dicke-type phase transition in a multimode optomechanical system
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.
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.
J.B. COULON, E LANDAIS INRA Laboratoire de la Lactation
Paris-Sud XI, Université de
J.B. COULON, E LANDAIS J.P. GAREL INRA Laboratoire de la Lactation Theix 63122 Saint vache laitière Interrelations à l'échelle de la lactation et de la carrière Les mammites et les longue durée (6 ans) et a porté sur 487 lactations de 190 vaches Pie-Noires et Montbéliardes. Au cours de
J.B. COULON, Y. CHILLIARD INRA Laboratoire de la Lactation
Boyer, Edmond
J.B. COULON, Y. CHILLIARD B. R?MOND INRA Laboratoire de la Lactation et de l'Elevage des Ruminants lactation des animaux, des modifications de l'alimentation (en particulier le passage à l'herbe) et l physiologique n'ont été en général étudiées que sur la période habituelle de lactation (10 mois). Les
Universal maps on trees Carl Eberhart and J.B. Fugate
Kentucky, University of
Universal maps on trees Carl Eberhart and J.B. Fugate Department of Mathematics University of Kentucky Lexington, Kentucky 40506 January 10, 1997 Abstract A map f : R ! S of continua R and S is called a universal map from R to S if for any map g : R ! S, f(x) = g(x) for some point x 2 R. When R and S are trees
Jin, Zhong Min; Sha, Wei; Zhang, Yan Fu; Zhao, Jing; Ji, Hongyang
2013-07-01
Phytoremediation combined with suitable microorganisms and biodegradable chelating agents can be a means of reclaiming lands contaminated by toxic heavy metals. We investigated the ability of a lead- and cadmium-resistant bacterial strain (JB12) and the biodegradable chelator ethylenediamine-N,N'-disuccinic acid (EDDS) to improve absorption of these metals from soil by tall fescue and red clover. Strain JB12 was isolated from contaminated soil samples, analysed for lead and cadmium resistance, and identified as Burkholderia cepacia. Tall fescue and red clover were grown in pots to which we added JB12, (S,S)-EDDS, combined JB12 and EDDS, or water only. Compared with untreated plants, the biomass of plants treated with JB12 was significantly increased. Concentrations of lead and cadmium in JB12-treated plants increased significantly, with few exceptions. Plants treated with EDDS responded variably, but in those treated with combined EDDS and JB12, heavy metal concentrations increased significantly in tall fescue and in the aboveground parts of red clover. We conclude that JB12 is resistant to lead and cadmium. Its application to the soil improved the net uptake of these heavy metals by experimental plants. The potential for viable phytoremediation of lead- and cadmium-polluted soils with tall fescue and red clover combined with JB12 was further enhanced by the addition of EDDS. PMID:23826953
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
Substrate range of the (chloro)biphenyl degradation pathway of Alcaligenes sp. JB1
Parsons, J.R.; Goorissen, H.; Weiland, A.R.; Bruijne, J.A. de [Univ. of Amsterdam (Netherlands). Dept. of Environmental and Toxicological Chemistry; Springael, D.; Lelie, D. van der; Mergeay, M. [VITO/Flemish Inst. for Technological Research, Mol (Belgium). Lab. of Genetics and Biotechnology
1995-12-31
The genes encoding the biphenyl degradation pathway of Alcaligenes sp. strain JB1 were cloned in an R-prime plasmid in Alcaligenes eutrophus strain AE53. Subsequently, recombinant Alcaligenes eutrophus strains containing the bphABC genes of JB1 were selected by the accumulation of a yellow ring-cleaved product from biphenyl and 2,3-dihydroxy-biphenyl. Gluconate-grown cultures of one of these recombinants were tested for their ability to degrade 2,2{prime},3,3{prime}-tetrachlorobiphenyl, 2-chloro-dibenzo-p-dioxin, 1-chloronaphthalene, 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (p,p{prime}-DDT), and 2,4{prime}-dichlorodiphenyl ether. Depending on their solubility, the initial concentrations of these compounds were between 10 and 100 {micro}g/L. In all cases more than 65% of these compounds was removed within a 24-h incubation period. These results show that the enzymes responsible for degrading (chloro)biphenyls in strain JB1 are able to attack a wide range of aromatic compounds. This strain, or those containing similar enzymes, may be applicable to the bioremediation of mixtures of contaminants.
Types and Limits of Agent Autonomy Gordon Beavers and Henry Hexmoor
Hexmoor, Henry
Types and Limits of Agent Autonomy Gordon Beavers and Henry Hexmoor Computer Science & Computer of positions with respect to autonomy will be surveyed in section 2. #12;2 Gordon Beavers and Henry Hexmoor One
Generalized Sparling-Thirring form in the Brans-Dicke theory
Ahmet Baykal; zgr 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.
The Dicke model as the contraction limit of a pseudo-deformed Richardson-Gaudin model
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.
Modified Brans-Dicke theory of gravity from five-dimensional vacuum
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.
Experimental Quantum Networking Protocols via Four-Qubit Hyperentangled Dicke States
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.
Dicke-Hepp-Lieb Superradiant Phase Transition and Independent Modes Model in Quantum Optomechanics
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.
Generation of Dicke States with Phonon-Mediated Multi-level Stimulated Raman Adiabatic Passage
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.
Cosmological implications of a supersymmetric extension of the Brans-Dicke theory
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.
Dick Effect in a Microwave Frequency Standard Based on Laser-Cooled 113Cd+ Ions
NASA Astrophysics Data System (ADS)
Zhang, Jian-Wei; Miao, Kai; Wang, Li-Jun
2015-01-01
The Dick effect is one of the main limits to the frequency stability of a passive frequency standard, especially for the fountain clock and ion clock operated in pulsed mode which require unavoidable dead time during interrogation. Here we measure the phase noise of the interrogation oscillator applied in the microwave frequency standard based on laser-cooled 113Cd+ ions, and analyze the Allan deviation limited by the Dick effect. The results indicate that the Dick effect is one of the key issues for the cadmium ion clock to reach expected frequency stability. This problem can be resolved by interrogating the local oscillator continuously with two ion traps.
Generalized Sparling-Thirring form in the Brans-Dicke theory
NASA Astrophysics Data System (ADS)
Baykal, Ahmet; Delice, zgr
2015-02-01
The definition of the Sparling-Thirring form is extended to 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 Brans-Dicke theory.
Science Advisor and Applied Physicist: Joseph Henry Serves His Country
NASA Astrophysics Data System (ADS)
Rothenberg, Marc
1997-04-01
When Joseph Henry accepted the postion of secretary of the Smithsonian in 1846, his career changed radically. Although he never ceased thinking of himself as a research scientist and educator, thereafter his chief roles were those of science administrator and advisor to both the executive and legislative branches of the federal government for both science and technology. His effectiveness as an advocate became more important than his skill as an experimental physicist. Even when he entered the laboratory, his role had changed. No longer was he concerned with basic research. As a member of various government boards and committees, Henry spent the last three decades of his life concerned with the application of fundamental knowledge for the improvement of the human condition. This paper will discuss Henry's service on behalf of his country.
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
Exhuming Henry VIII's Court: The Tudor Household on the Jacobean Stage
Moore, Gaywyn
2011-12-31
The Jacobean plays that perform Henry VIII and his court struggle with Henry's paradoxical image and his troubling legacy of discarded advisors, wives, and heirs. Sir Thomas More, Thomas Lord Cromwell, When You See Me, You Know Me, and King Henry...
BREEDING WATERFOWL USE OF INTERMITTENT STREAMS McHENRY COUNTY, NORTH DAKOTA
BREEDING WATERFOWL USE OF INTERMITTENT STREAMS McHENRY COUNTY, NORTH DAKOTA BY DANIEL E. HUBBARD OF INTERMITTENT STREAf-1S McHENRY COUNTY, NORTH DAKOTA This thesis is approved as a creditable and independent;BREEDING WATERFOWL USE OF INTERMITTENT STREAMS McHENRY COUNTY, NORTH DAKOTA Abstract DANIEL E. HUBBARD
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)
Motional frequency shifts of trapped ions in the Lamb-Dicke regime
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.
Cosmic string configuration in a five dimensional Brans-Dicke theory
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.
Gravitating monopole and its black hole solution in Brans-Dicke Theory
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.
Brans-Dicke Cosmology in an Anisotropic Model When Velocity of Light Varies
NASA Astrophysics Data System (ADS)
Chakraborty, Subenoy; Chakraborty, Narayan Chandra; Debnath, Ujjal; Dolgov, A.
In this paper, we have studied Brans-Dicke (BD) Cosmology in an anisotropic Kantowski-Sachs space-time model; considering variation of the velocity of light. We have addressed the flatness problem considering both cases namely (i) when the Brans-Dicke scalar field ? is constant (ii) when ? varies, specially for radiation dominated era perturbatively and non-perturbatively and asymptotic behaviour have been studied.
On the weak field approximation of Brans-Dicke theory of gravity
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.
From Brans-Dicke gravity to a geometrical scalar-tensor theory
NASA Astrophysics Data System (ADS)
Almeida, T. S.; Pucheu, M. L.; Romero, C.; Formiga, J. B.
2014-03-01
We consider an approach to the Brans-Dicke theory of gravity in which the scalar field has a geometrical nature. By postulating the Palatini variation, we find out that the role played by the scalar field consists in turning the space-time geometry into a Weyl integrable manifold. This procedure leads to a scalar-tensor theory that differs from the original Brans-Dicke theory in many aspects and presents some new features.
Exponentially Expanding Radiation Dominated and Dust Dominated Universes in Brans-Dicke Theory
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.
Realization of the Dicke Model Using Cavity-Assisted Raman Transitions
NASA Astrophysics Data System (ADS)
Baden, Markus P.; Arnold, Kyle J.; Grimsmo, Arne L.; Parkins, Scott; Barrett, Murray D.
2014-07-01
We realize an open version of the Dicke model by coupling two hyperfine ground states using two cavity-assisted Raman transitions. The interaction due to only one of the couplings is described by the Tavis-Cummings model and we observe a normal mode splitting in the transmission around the dispersively shifted cavity. With both couplings present the dynamics are described by the Dicke model and we measure the onset of superradiant scattering into the cavity above a critical coupling strength.
Comment on the Brans Dicke Bianchi Type-Iii Vacuum Solution
NASA Astrophysics Data System (ADS)
Lorenz-Petzold, Dieter
1985-02-01
The author wishes to point out that the Brans-Dicke-Bianchi type-III vacuum solution recently given by Tiwari and Singh (1984) is not new. Moreover, the solution given has no correct Einstein limit, contrary to what is claimed by these authors. The Ellis-MacCallum vacuum solution in the Einstein case can be obtained from the Brans-Dicke solution first given by Lorenz-Petzold (1984).
Role of Brans-Dicke Theory with or without self-interacting potential in cosmic acceleration
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.
A Cylindrically Symmetric Universe Filled with Viscous Fluid in a Modified Brans-Dicke Cosmology
NASA Astrophysics Data System (ADS)
Rai, Priyanka; Singh, Vivek K.; Rai, L. N.
2013-08-01
Adding the cosmological term, which is assumed to be variable in Brans-Dicke theory we have discussed about a cylindrically symmetric model filled with viscous fluid with free gravitational field of Petrov type-D. The effect of viscosity on various kinematical parameters has been discussed. Finally, this model has been transformed to the original form (1961) of Brans-Dicke theory (including a variable cosmological term).
Notes on the Chameleon Brans-Dicke gravity
NASA Astrophysics Data System (ADS)
Bisabr, Yousef
2014-03-01
We consider a generalized Brans-Dicke model in which the scalar field has a potential function and is also allowed to couple non-minimally with the matter sector. This anomalous gravitational coupling can in principle avoid the model to pass local gravity experiments. One then usually assumes that the scalar field has a chameleon behavior in the sense that it acquires a density-dependent effective mass. While it can take a small effective mass in cosmological (low-density environment) scale, it has a sufficiently heavy mass in Solar System (large-density environment) and then hides gravity tests. We will argue that such a chameleon behavior can not be generally realized and depends significantly on the forms attributed to the potential and the coupling functions.
Dynamics of Brans-Dicke cosmology with varying mass fermions
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.
Entanglement, chaos and atomic Wigner function of the Dicke model
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.
Mathematical methods in quantum optics: the Dicke model
NASA Astrophysics Data System (ADS)
Nahmad-Achar, Eduardo; Castaos, Octavio; Lpez-Pea, Ramn; Hirsch, Jorge G.
2013-03-01
We show how various mathematical formalisms, specifically the catastrophe formalism and group theory, aid in the study of relevant systems in quantum optics. We describe the phase transition of the Dicke model for a finite number N of atoms, via three different methods, which led to universal parametric curves for the expectation value of the first quadrature of the electromagnetic field and the expectation value of the number operator, as functions of the atomic relative population. These are valid for all values of the matter-field coupling parameter, and valid for both the ground and first-excited states. Using these mathematical tools, the critical value of the atom-field coupling parameter is found as a function of the number of atoms, from which its critical exponent is derived.
Generalized ghost dark energy in Brans-Dicke theory
A. Sheykhi; E. Ebrahimi; Y. Yosefi
2013-07-23
It was argued that the vacuum energy of the Veneziano ghost field of QCD, in a time-dependent background, can be written in the general form, $H + O(H^2)$, where $H$ is the Hubble parameter. Based on this, a phenomenological dark energy model whose energy density is of the form $\\rho=\\alpha H+\\beta H^{2}$ was recently proposed to explain the dark energy dominated universe. In this paper, we investigate this generalized ghost dark energy model in the setup of Brans-Dicke cosmology. We study the cosmological implications of this model. In particular, we obtain the equation of state and the deceleration parameters and a differential equation governing the evolution of this dark energy model. It is shown that the equation of state parameter of the generalized ghost dark energy can cross the phantom line ($w_D=-1$) in some range of the parameters spaces.
McHenry County College AAS Degree: Criminal Justice
Kostic, Milivoje M.
McHenry County College AAS Degree: Criminal Justice Bachelor of Science in Applied Management The Criminal Justice System (met by MCC CRJ 101) 3 Total DEGREE credits for NIU BSAM in Public Safety 120 College AAS Degree: Criminal Justice Academic Advising: It is important that a student contact the NIU
4. Historic American Buildings Survey Photocopy, Henry Austin's Drawing c. ...
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
10. Historic American Buildings Survey Photocopy, Henry Austin's Drawing EAST ...
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
Henry Fitz: A Preeminent 19th Century American Telescope Maker
NASA Astrophysics Data System (ADS)
Abrahams, Peter
A history of telescope maker Henry Fitz (1808-1863). Mentioned are: Amasa Holcomb, Wolcott, Lewis Rutherford, Elisa Robinson (woman), James Gillis, Erskine College, Robert Van Arsdale, Jacob Phelps, South Carolina College, Haverford College, Alleghany College, Clark, Brashear, Dudley Observatory, William Van Duzee, and Elijah Burritt. An on-line text version is available on the author's website.
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
Downstream Changes in Stream Power in the Henry Mountains, Utah
William L. Graf
1983-01-01
Total stream power does not necessarily increase systematically in the downstream direction because of the conflicting influences of channel slope, width, and depth. Historical records and field data for arroyo systems of the northern Henry Mountains, south-central Utah, show that total stream power decreased in the downstream direction during a deposition period before 1896 and increased downstream during an erosion
Science et philosophie chez Henri Tintant (19182002)
Jean Gayon
2005-01-01
Henri Tintant played a pioneering role in the introduction of quantitative methods in palaeontology. Correlatively, he was always concerned by the question whether palaeontology was a science in the strong sense of the term, that is to say a kind of knowledge based on robust and lawful generalizations. This is the question that led him to develop philosophical thoughts in
Finding Glass Kenton McHenry, Jean Ponce
Forsyth, David
Finding Glass Kenton McHenry, Jean Ponce Beckman Institute University of Illinois Urbana, IL 61801. This paper addresses the problem of finding glass ob- jects in images. Visual cues obtained by combining with the strong highlights typical of glass surfaces are used to train a hierarchy of classifiers, identify glass
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
Henry David Thoreau and Martin Luther King, Jr. Lesson Plan.
ERIC Educational Resources Information Center
Powell, Brent
1995-01-01
Presents a five-lesson, high school instructional unit on the ideas and activities of Henry David Thoreau and Martin Luther King, Jr. Includes student objectives, step-by-step instructional procedures, and discussion questions. Provides quotations by Thoreau and King. (CFR)
Search for the Origin of the Forces Richard Conn Henry
1 Search for the Origin of the Forces Richard Conn Henry 2011 August 6 The great unsolved problem in physics, is the origin of the four forces. Indeed, we do not even know that there are only four of them! I of the universe. #12;2 That last phrase is the kind of thing we want to avoid, it exhibits prejudice: words
Multiple Paternity in Polyandrous Barn Owls (Tyto alba) Isabelle Henry.
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
FrankDiMeoHenriKroger The Lure of the
Wang, Z. Jane
FrankDiMeoHenriKroger #12;The Lure of the Dragonfly principle the swirls of air that are generated. Why dragonflies? They are beautiful and mysterious. Part of the mystery had to do with claims in understanding the aero- dynamics of flapping flight. When I see a dragonfly darting in the air in an up
Living on Writer's Block: Henry Roth and American Literature
Steven G. Kellman
2008-01-01
Three mysteries surround Henry Roth (1906–95), the Rip Van Winkle of American authors: 1) Why was Call It Sleep ignored in 1934 but acclaimed in 1964? 2) Why did Roth renounce literary life after Call It Sleep? 3) What compelled Roth, in his eighties and dying, to summon the fortitude to create the tetralogy Mercy of a Rude Stream? The
Autonomic Neurotransmission: 60 Years Since Sir Henry Dale
Geoffrey Burnstock
2009-01-01
In the early twentieth century, Sir Henry Dale and others described brilliant studies of autonomic neurotransmission utilizing acetylcholine and nora- drenaline. However, within the past 60 years, new discoveries have changed our understanding of the organization of the autonomic nervous system, including the structure and function of the nonsynaptic autonomic neu- roeffector junction, the multiplicity of neurotransmitters, cotransmission, neuromodulation, dual
HENRI D. GRISSINO-MAYER Department of Geography
Grissino-Mayer, Henri D.
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 of Geography, The University of Tennessee, 2014present Professor, Department of Geography, The University
Henry Charlton Bastian (18371915): Neglected Neurologist and Scientist
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
7. Historic American Buildings Survey Photographed by Henry F. Withey, ...
7. Historic American Buildings Survey Photographed by Henry F. Withey, MaY 1937 SHOP RUINS (DETAIL OF SOAP OVEN) - Mission San Juan Capistrano, Industrial Shops, Olive Street, between U.S. Highway 101 & Main Street, San Juan Capistrano, Orange County, CA
6. Historic American Buildings Survey Photographed by Henry F. Withey ...
6. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SOAP FACTORY & SMITHY (FROM S. E. END OF SOAP FACTORY) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA
Direct Liquid Cooling for Electronic Henry Coles and Steve Greenberg
LBNL-6641E Direct Liquid Cooling for Electronic Equipment Henry Coles and Steve Greenberg consulting and modeling to support the energy-efficiency analysis. Thanks to Vali Sorell, V for this project. #12;ii ABSTRACT This report documents a demonstration of an electronic
Sedimentation-consolidation of a double porosity material Henry Wonga
Paris-Sud XI, Université de
page 1 Sedimentation-consolidation of a double porosity material Henry Wonga , Chin J. Leob , J, France Abstract. This paper studies the sedimentation-consolidation of a double porosity material is an evident example, and lumpy clays used in land reclamation is another. In the earlier, the fractures
77 FR 70159 - Knueppel, Henry W.; Notice of Filing
Federal Register 2010, 2011, 2012, 2013, 2014
2012-11-23
...Filing Take notice that on November 15, 2012, Henry W. Knueppel submitted for filing, an application for authority to hold interlocking positions, pursuant to section 305(b) of the Federal Power Act, 16 U.S.C. 825d(b) (2008), Part 45 of...
McHenry County College AAS Degree: Criminal Justice
Kostic, Milivoje M.
not used as core*) (3) PSPA 413 Civic Engagement (1) POLS 415 Criminal Law (3) POLS 386 Global Terrorism (3McHenry County College AAS Degree: Criminal Justice This form is provided for informational) SOCI 380 Deviance in Society (3) SOCI 381 (met by MCC CJS 140) SOCI 383 The Criminal Justice System
Challenging Texts: Teaching Deliberately--Reading Henry David Thoreau's "Walden"
ERIC Educational Resources Information Center
Davis, Andrea
2011-01-01
One of the more difficult 19th-century American texts for high school students to read is undoubtedly Henry David Thoreau's "Walden." His erudite allusions, often page-long sentences, and sophisticated sense of the ironic initially leave many students cold. Still, the author encourages them to read amid the din of a cultural cacophony that shouts
The Transformative Intellectual: An Examination of Henry Giroux's Ethics
ERIC Educational Resources Information Center
Kashani, Tony
2012-01-01
This article explores Henry Giroux's contributions to critical pedagogy. The author demonstrates how Giroux, as a public intellectual, has found his Ethics in the right place. The author further argues that Giroux's Ethics of virtue are present not only in the public person but also in his transformative writing.
15. Photocopy of map, drawn by Henry Hagey, circa 1900 ...
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
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.
Jane P. Ko, MD Henry Rusinek, PhD
Sclaroff, Stan
Jane P. Ko, MD Henry Rusinek, PhD Erika L. Jacobs, MD James S. Babb, PhD Margrit Betke, PhD Georgeann McGuinness, MD David P. Naidich, MD Index terms: Computed tomography (CT), image processing, 60, 60.12117 Published online 10.1148/radiol.2283020059 Radiology 2003; 228:864870 Abbreviations: FTM
"Audacity or Precision": The Paradoxes of Henri Villat's Fluid Mechanics
Paris-Sud XI, Université de
1 "Audacity or Precision": The Paradoxes of Henri Villat's Fluid Mechanics in Interwar France David researches on fluid mechanics. Most of his original work was done before the First Word War; it was highly on, he held the fluid mechanics chair established by the Air Ministry at the Sorbonne in Paris
Development of a New Shielding Model for JB-Line Dose Rate Calculations
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.
Havinga, Paul J.M.
Abstract The Moby Dick project is a joint european project to develop and define the architecture networking, and by applying power aware MAC protocols. 1 INTRODUCTION The Moby Dick project [7] is a joint
, 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
Levinson, David M.
(4), 597-608. 2. Wu, X., Liu, H., Gettman, D. (2010) Identification of Oversaturated Intersections Using Research Part B, 42(9), 823-842. Five other significant publications: 6. Zhu, S., Levinson, D., Liu, H1 Biographical Sketch for Henry Liu Dr. Henry Liu is currently an Associate Professor of Civil
Rao, Satish
of men to build. One day, a man brought a steam engine to the tunnel and said it could drive steel better than any man. So, a contest was made between John Henry and the steam engine.. For twelve long hours, John Henry hammered and the steam engine drilled. At the end, the tape was brought in to measure
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...
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
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
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
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
Holt, Lori L.
, Apel, T. 1, Holt., L. 3 & Dick., F 1 1) Birkbeck/UCL Centre for NeuroImaging, London, UK; 2) Imperial College, London; 3) Carnegie Mellon University, USA; - Results Contact: r.leech@bbk.ac.uk, f.dick; Dick et al., 2007). However, activation in one of these left STS regions can be changed by short
Modified Brans-Dicke Theory in Arbitrary Dimensions
Rasouli, S M M; Moniz, Paulo Vargas
2014-01-01
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 ...
Modified Brans-Dicke Theory in Arbitrary Dimensions
S. M. M. Rasouli; Mehrdad Farhoudi; Paulo Vargas Moniz
2014-05-13
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.
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.
From the Jaynes-Cummings-Hubbard to the Dicke model
Sebastian Schmidt; Gianni Blatter; Jonathan Keeling
2013-07-09
We discuss the Jaynes-Cummings-Hubbard model (JCHM) describing the superfluid-Mott insulator transition of polaritons (i.e., dressed photon-qubit states) in coupled qubit-cavity arrays in the crossover from strong to weak correlations. In the strongly correlated regime the phase diagram and the elementary excitations of lattice polaritons near the Mott lobes are calculated analytically using a slave boson theory (SBT). The opposite regime of weakly interacting polariton superfluids is described by a weak-coupling mean-field theory (MFT) for a generalised multi-mode Dicke model. We show that a remarkable relation between the two theories exists in the limit of large photon bandwidth and large negative detuning, i.e., when the nature of polariton quasiparticles becomes qubit-like. In this regime, the weak coupling theory predicts the existence of a single Mott lobe with a change of the universality class of the phase transition at the tip of the lobe, in perfect agreement with the slave-boson theory. Moreover, the spectra of low energy excitations, i.e., the sound velocity of the Goldstone mode and the gap of the amplitude mode match exactly as calculated from both theories.
Holographic Dark Energy in Brans-Dicke Theory
Lixin Xu; Wenbo Li; Jianbo Lu
2009-04-14
In this paper, the holographic dark energy model is considered in Brans-Dicke theory where the holographic dark energy density $\\rho_{\\Lambda} =3c^2 M^{2}_{pl} L^{-2}$ is replaced with $\\rho_{h}=3c^2 \\Phi(t)L^{-2}$. Here $\\Phi(t)=\\frac{1}{8\\pi G}$ is a time variable Newton constant. With this replacement, it is found that no accelerated expansion universe will be achieved when the Hubble horizon is taken as the role of IR cut-off. When the event horizon is adopted as the IR cut-off, an accelerated expansion universe is obtained. In this case, the equation of state of holographic dark energy $w_h$ takes a modified form $w_h=-{1/3}(1+\\alpha+\\frac{2}{c}\\sqrt{\\Omega_{h}})$. In the limit $\\alpha\\to 0$, the 'standard' holographic dark energy is recovered. In the holographic dark energy dominated epoch, power-law and de Sitter time-space solutions are obtained.
Tongu 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.
Laser cooling of two trapped ions: Sideband cooling beyond the Lamb-Dicke limit G. Morigi,1
Blatt, Rainer
Laser cooling of two trapped ions: Sideband cooling beyond the Lamb-Dicke limit G. Morigi,1 J Received 8 December 1998 We study laser cooling of two ions that are trapped in a harmonic potential and interact by Coulomb repulsion. Sideband cooling in the Lamb-Dicke regime is shown to work analogously
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...
Hooper, Scott
2012 Tasha Seiter Feeding behavior of the lobster Paper: JB Thuma, KH Hobbs, HJ Burstein, NS Seiter in lobster (Panulirus) pyloric network". 1999-2001 Kevin Hobbs. Identification of the muscles innervated, SL Hooper (2007) Muscle anatomy is a primary determinant of muscle relaxation dynamics in the lobster
doi:10.1128/JB.01048-09. J. Bacteriol. 192(5):1269-1278..Vibrio fischeri
McFall-Ngai, Margaret
OF BACTERIOLOGY, Mar. 2010, p. 12691278 Vol. 192, No. 5 0021-9193/10/$12.00 doi:10.1128/JB.01048-09 Copyright colonization of the squid Euprymna scolopes. Disruption or deletion of binA increased biofilm formation an exopolysaccharide called O-antigen capsule to form biofilms on human gallstones but not to form biofilms on glass
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
W. Henry Robinson: Popularising astronomy in Victorian Walsall and Birmingham
NASA Astrophysics Data System (ADS)
Williams, S.
William Henry Robinson was one of the most prominent citizens of Walsall, then part of Staffordshire, in the Victorian and Edwardian periods. An influential businessman, he managed to combine printing, publishing, editing a newspaper, writing books and poetry, maintaining a library and retail trading with founding the town's literary institute, and bringing the scientists, explorers, authors and cultural pursuits of the day to his home town. An amateur astronomer in his own right, Robinson was instrumental in setting up the BAA's Midland Branch.
Henry's law constants of some environmentally important aldehydes
Eric A. Betterton; Michael R. Hoffmann
1988-01-01
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\\/ 10⁵; glyoxal, greater
Enantioselective aza-Henry reaction using cinchona organocatalysts
Luca Bernardi; Francesco Fini; Raquel P. Herrera; Alfredo Ricci; Valentina Sgarzani
2006-01-01
The aza-Henry reaction of imines with nitromethane was promoted by cinchona alkaloids and modified cinchona bases to give optically active ?-nitroamines. Various N-protected imines were examined as substrates. N-Boc, N-Cbz, and N-Fmoc protected imines gave the best results in terms of chemical yields and enantioselectivities. After a careful screening of a series of chiral bases, very good enantioselectivities up to
In praise of the literary eponymHenry V sign
Houlihan, C.; Marks, J. Charles
2013-01-01
The use of eponyms in medicine is often discouraged. However, the literary eponym should be an exception as it is not linked with many of the difficulties associated with conventional eponyms and offers descriptive brevity and accuracy. Here, we illustrate the point with Henry V sign, which will be familiar to many who have cared for patients in the terminal stage of illness. PMID:23108030
BOOK REVIEW: Joseph Henry: The Rise of an American Scientist
NASA Astrophysics Data System (ADS)
Crawford, Elspeth
1998-09-01
Albert Moyer has clearly done his research into the events of Joseph Henry's life. The personal, professional, sociological and scientific aspects have been meticulously detailed throughout and the ordering, as in the chapter headings, is chronological, so that there is some element of each of these aspects in each chapter. This is unfortunately both the strength and the weakness of the biography, as the detail seemed to me to be the most remarkable characteristic of the writing. But, the bigger stories, or the themes, which might have been possible, seemed to get lost. Hence, I found this a book for those who are seriously interested in Joseph Henry; but for those whose interest might be more general, say having an interest in nineteenth century growth of scientific institutions, or wanting to understand the conceptual development of electromagnetism, there seemed to be too much which came from the Henry point of view, rather than locating Henry within his time and context. This is a remark about style, rather than omission of content, as the myriad of details in each paragraph certainly inform the reader about the context. For instance, some sociology of the USA in the nineteenth century could be inferred, say showing how a young man from a modest background might make his way into a professional life, but the information is so particularly a description of Henry's experience that one has to rely on prior knowledge or make assumptions in order to create a sociological perspective. That is, I now know, what happened to Henry, but I do not know if his case was in any sense typical or atypical. Similarly there is information about education in general at that time, and scientific education, research and its publication, as it applied to Henry. The relationships between science in the USA and in Europe have a place, and there is quite a bit of information about the institutions in which Henry worked, particularly Albany Academy, Princeton and the Smithsonian. Henry's marriage and family, and his beliefs are addressed; we hear how his work kept him from his family at times, but also how much they meant to him. And, of course, there are scientific questions and factual information about the field in which he is renowned - electromagnetism. It is hard to find fault with the quantity and breadth of what is offered, and very easy to criticize the way in which it is offered; nevertheless it seems to me that this is a superb record of events, but without the themes or pictures that would make it a biography. Before reading the book, I was acquainted with some of Henry's writing on electromagnetism (researched as part of my own work on Michael Faraday). I looked in vain for the personality whom I had met in a few scientific papers, a person who had written of new experimentation and results, who knew that new theory was needed also, and who, when he could not think of any, said disarmingly, `this part of the investigation, was, for a time, given up almost in despair'. Moyer does not seem to convey this personality whose words engage other people, even at a distance in time. In spite of this severe criticism, the book has an enticing quality, probably best summarized by its introduction. This recounts the quite staggering attendance at Henry's funeral service and the tenor of obituary notices: this man was loved, by many. Hence, while reading, one continually looks for biography which would in some measure account for this loving and high regard. That is, we are given a measure of this man, and then it is as if the nature of the measure remains unknown however often mentioned. Maybe this beginning in a sense creates the disappointment. It would seem that Henry signifies something greater than wide achievements for those who actually knew him or who read his writing. Could this be the willingness to learn and keep trying, to put others' needs in front of his own, to have both modesty and enthusiasm for enquiry, not-knowing as well as knowing, etc? In other words, the humanness which is needed and needs, achievement, is hidden here a
Henry's law constants of some environmentally important aldehydes
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.
Gravitational constraints of dS branes in AdS Einstein-Brans-Dicke bulk
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.
Shu He; Liwei Duan; Qing-Hu Chen
2015-03-14
In this paper, the finite size Dicke model of arbitrary number of qubits is solved analytically in an unified way within extended coherent states. For the $N=2k$ or $2k-1$ Dicke models ($k$ is an integer), the $G$-function, which is only an energy dependent $k \\times k$ determinant, is derived in a transparent manner. The regular spectrum is completely and uniquely given by stable zeros of the $G$-function. The closed-form exceptional eigenvalues are also derived. The level distribution controlled by the pole structure of the $G$-functions suggests non-integrability for $N>1$ model at any finite coupling in the sense of recent criterion in literature. A preliminary application to the exact dynamics of genuine multipartite entanglement in the finite $N$ Dicke model is presented using the obtained exact solutions.
NASA Astrophysics Data System (ADS)
He, Shu; Duan, Liwei; Chen, Qing-Hu
2015-04-01
In this paper, the finite-size Dicke model of arbitrary number of qubits is solved analytically in a unified way within extended coherent states. For the N=2k or 2k-1 Dicke models (k is an integer), the G-function, which is only an energy dependent k k determinant, is derived in a transparent manner. The regular spectrum is completely and uniquely given by stable zeros of the G-function. The closed-form exceptional eigenvalues are also derived. The level distribution controlled by the pole structure of the G-functions suggests non-integrability for N\\gt 1 model at any finite coupling in the sense of recent criteria found in the literature. A preliminary application to the exact dynamics of genuine multipartite entanglement in the finite-N Dicke model is presented using the obtained exact solutions.
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.
Observation of Dicke superradiance for two artificial atoms in a cavity with high decay rate
NASA Astrophysics Data System (ADS)
Mlynek, J. A.; Abdumalikov, A. A.; Eichler, C.; Wallraff, A.
2014-11-01
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 Dickes 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.
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.
Henry Chan Inclusive Education Grant for Students with a Disability or Special Learning Needs
Tam, Vincent W. L.
Henry Chan Inclusive Education Grant for Students with a Disability or Special Learning Needs* (including attention deficit/ hyperactive disorders, autism /autistic spectrum disorders, hearing impairments
Images of Moby-Dick: An exhibition of editions of Herman Melville's great novel of whaling
1995-01-01
Pere, WI] St. Norbert College Press, 1972. Loaned by Frederick P. Conboy. 31 Images of Moby-Dick 6 4 Walt Disney : Moby Duck. Gold Key 90209-508. Moby Duck 25tf. [Poughkeepsie, NY: Western Publishing Company, cl975] "Walt Disney Moby Duck, No. 19.... Boston: The Page Company Publishers [cl892; Sixth impression, June, 1921] The four black-and-white illustrations by A. Burnham Shute are from the first illustrated edition of Moby-Dick, published in New York by the American Publishers Corporation, 1896...
Spherically Symmetric Jordan-Brans-Dicke Quantum Gravity with de Broglie Bohm Pilot Wave Perspective
NASA Astrophysics Data System (ADS)
Ghaffarnejad, Hossein
2014-08-01
We obtain two dimensional analogue of the Jordan-Brans-Dicke (JBD) gravity action described in four dimensional spherically symmetric curved space time metric. There will be two scalar fields, namely, the Brans Dicke (BD) ? and scale factor of 2-sphere part of the space time ?. We obtained suitable duality transformations between ( ?, ?) and ( ?, S) where ? and S is respectively amplitude and phase part of the corresponding de Broglie pilot wave function Covariant conservation of mass-energy current density of particles ensemble J a = ?? a S, is established by applying a particular dynamical conformal frame described by ( ?, S).
Thermal phase transitions for Dicke-type models in the ultra-strong coupling limit
M. Aparicio Alcalde; M. Bucher; C. Emary; T. Brandes
2012-04-10
We consider the Dicke model in the ultra-strong coupling limit to investigate thermal phase transitions and their precursors at finite particle numbers $N$ for bosonic and fermionic systems. We derive partition functions with degeneracy factors that account for the number of configurations and derive explicit expressions for the Landau free energy. This allows us to discuss the difference between the original Dicke (fermionic) and the bosonic case. We find a crossover between these two cases that shows up, e.g., in the specific heat.
Dark Matter Haloes and Rotation Curves via Brans-Dicke Theory
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.
Husimi distribution and phase space analysis of Dicke model quantum phase transition
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.
Shear and Vorticity in an Accelerating Brans-Dicke Lambda-Universe with Torsion
Marcelo Samuel Berman
2008-08-06
We study accelerating Universes with power-law scale-factors. We include shear and vorticity, a cosmological "constant" term, and spin from torsion, as in Einstein-Cartan's theory when a scalar-field of Brans-Dicke type acts in the model. We find a "no-hair" result, for shear and vorticity; we also make contact with the alternative Machian picture of the Universe. Keywords: Cosmology; Einstein; Brans-Dicke; Cosmological term; Shear; Spin; Vorticity; Inflation; Einstein-Cartan; Torsion; Accelerating Universe
Drude weight, cyclotron resonance, and the Dicke model of graphene cavity QED
Luca Chirolli; Marco Polini; Vittorio Giovannetti; Allan H. MacDonald
2012-07-30
The Dicke model of cavity quantum electrodynamics is approximately realized in condensed matter when the cyclotron transition of a two-dimensional electron gas is nearly resonant with a cavity photon mode. We point out that in the strong coupling limit the Dicke model of cavity cyclotron resonance must be supplemented by a term that is quadratic in the cavity photon field and suppresses the model's transition to a super-radiant state. We develop the theory of graphene cavity cyclotron resonance and show that the quadratic term, which is absent in graphene's low-energy Dirac model Hamiltonian, is in this case dynamically generated by virtual inter-band transitions.
scar Dias; Jose' P. S. Lemos
2001-01-01
We obtain static and rotating electrically charged black holes of a\\u000aEinstein-Maxwell-Dilaton theory of the Brans-Dicke type in (2+1)-dimensions.\\u000aThe theory is specified by three fields, the dilaton, the graviton and the\\u000aelectromagnetic field, and two parameters, the cosmological constant and the\\u000aBrans-Dicke parameter. It contains eight different cases, of which one\\u000adistinguishes as special cases, string theory, general relativity
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...
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.
Wang, Fei; Fu, Xueqi; Chen, Xia; Chen, Xinbin; Zhao, Yunfeng
2010-01-01
The tumor suppressor p53 is known to be able to trigger apoptosis in response to DNA damage, oncogene activation, and certain chemotherapeutic drugs. In addition to its transcriptional activation, a fraction of p53 translocates to mitochondria at the very early stage of apoptosis, which eventually contributes to the loss of mitochondrial membrane potential, generation of reactive oxygen species (ROS), cytochrome c release, and caspase activation. However, the mitochondrial events that affect p53 translocation are still unclear. Since mitochondrial uncoupling has been suggested to contribute to cancer development, herein, we studied whether p53 mitochondrial translocation and subsequent apoptosis were affected by mitochondrial uncoupling using chemical protonophores, and further verified the results using a siRNA approach in murine skin epidermal JB6 cells. Our results showed that mitochondrial uncoupling blocked p53 mitochondrial translocation induced by 12-O-tetradecanoylphorbol 13-acetate (TPA), a known tumor promoter to induce p53-mediated apoptosis in skin carcinogenesis. This blocking effect, in turn, led to preservation of mitochondrial functions, and eventually suppression of caspase activity and apoptosis. Moreover, uncoupling protein 2 (UCP2), a potential suppressor of ROS in mitochondria, is important for TPA-induced cell transformation in JB6 cells. UCP2 knock down cells showed enhanced p53 mitochondrial translocation, and were less prone to form colonies in soft agar after TPA treatment. Altogether, our data suggest that mitochondrial uncoupling may serve as an important regulator of p53 mitochondrial translocation and p53-mediated apoptosis during early tumor promotion. Therefore, targeting mitochondrial uncoupling may be considered as a novel treatment strategy for cancer. PMID:20976134
Wang, Fei; Fu, Xueqi; Chen, Xia; Chen, Xinbin; Zhao, Yunfeng
2010-01-01
The tumor suppressor p53 is known to be able to trigger apoptosis in response to DNA damage, oncogene activation, and certain chemotherapeutic drugs. In addition to its transcriptional activation, a fraction of p53 translocates to mitochondria at the very early stage of apoptosis, which eventually contributes to the loss of mitochondrial membrane potential, generation of reactive oxygen species (ROS), cytochrome c release, and caspase activation. However, the mitochondrial events that affect p53 translocation are still unclear. Since mitochondrial uncoupling has been suggested to contribute to cancer development, herein, we studied whether p53 mitochondrial translocation and subsequent apoptosis were affected by mitochondrial uncoupling using chemical protonophores, and further verified the results using a siRNA approach in murine skin epidermal JB6 cells. Our results showed that mitochondrial uncoupling blocked p53 mitochondrial translocation induced by 12-O-tetradecanoylphorbol 13-acetate (TPA), a known tumor promoter to induce p53-mediated apoptosis in skin carcinogenesis. This blocking effect, in turn, led to preservation of mitochondrial functions, and eventually suppression of caspase activity and apoptosis. Moreover, uncoupling protein 2 (UCP2), a potential suppressor of ROS in mitochondria, is important for TPA-induced cell transformation in JB6 cells. UCP2 knock down cells showed enhanced p53 mitochondrial translocation, and were less prone to form colonies in soft agar after TPA treatment. Altogether, our data suggest that mitochondrial uncoupling may serve as an important regulator of p53 mitochondrial translocation and p53-mediated apoptosis during early tumor promotion. Therefore, targeting mitochondrial uncoupling may be considered as a novel treatment strategy for cancer. PMID:20976134
Weber, Thomas J.; Shankaran, Harish; Wiley, H. S.; Opresko, Lee K.; Chrisler, William B.; Quesenberry, Ryan D.
2010-05-02
basic fibroblast growth factor (bFGF or FGF2) plays an important role in epidermal wound healing in vivo and is associated with a persistent increased in the extracellular signal-regulated kinase (ERK) pathway in vitro. Here we have examined whether bFGF induces the closure of an experimental scratch wound in JB6 mouse epidermal cells and have explored the regulation of the ERK pathway by bFGF in the context of kinase oscillations. bFGF stimulation is associated with increases in cellular phospho-ERK and phospho-c-Jun levels. In addition, bFGF increases cell proliferation and a change in cell morphology (stellate appearance) in a dose-dependent fashion (0.1 100 ng/ml). bFGF treatment also promoted the closure of an experimental scratch wound in vitro. JB6 cells were stably transfected with an ERK1-GFP chimera to follow temporal ERK subcellular distribution patterns. We observe a persistent upregulation of the ERK pathway, as evidenced by a significant increase in nuclear ERK1-GFP levels at time points up to 24 hr after bFGF treatment. Interestingly, at the single cell level, ERK is observed to oscillate between nuclear and cytosolic compartments in response to bFGF treatment. Because this oscillatory behavior is asynchronous in the cell population, it is only clearly resolved at the single cell level. Collectively, data presented here are consistent with an important role for bFGF in wound healing and suggest a more complex regulation of the ERK pathway by bFGF than has previously been appreciated.
The role of AP1, NF-?B and ROS\\/NOS in skin carcinogenesis: The JB6 model is predictive
Arindam Dhar; Mathew R. Young; Nancy H. Colburn
2002-01-01
Generation of reactive oxygen species (ROS) stimulates transcription by activating transcription factors activator protein 1 (AP-1) and nuclear factor ?B (NF-?B). The mouse epidermal JB6 cells constitute a model system that has significantly contributed to the understanding of these events. Clonal variants of JB6 cells are differentially responsive to transformation induced by tumor promoters such as phorbol esters (TPA), epidermal
A Cool Drink of Water Before I Die: Four Modern John Henry Songs
Gabriel Sealey-Morris
2009-01-01
Using Kenneth Burke's pentadic method of criticism, a study of four modern compositions based on the legend of John Henry reveals modern white anxietiesambivalent attitudes toward class, race, and agency that leave modern white performers far less certain than their folk precursors about the nature of the world and of heroism. While the composers of modern John Henry songs emulate
"Hot" for Warm Water Cooling Henry Coles, Lawrence Berkeley National Laboratory
Design, Economics, Standardization Keywords direct liquid cooling, dry cooler, cooling tower 1LBNL-5128E "Hot" for Warm Water Cooling Henry Coles, Lawrence Berkeley National Laboratory Michael thereof or The Regents of the University of California. #12;"Hot" for Warm Water Cooling Henry Coles
Estimation of Henry's Law Constant for a Diverse Set of Organic Compounds from Molecular Structure
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...
Rare earth element partitioning between titanite and silicate melts: Henry's law revisited
Rare earth element partitioning between titanite and silicate melts: Henry's law revisited Stefan earth elements (REE) between titanite and a range of different silicate melts. Our results show that Henry's law of trace element partitioning depends on bulk composition, the available partners
Fluid Phase Equilibria 226 (2004) 161172 Analysis of Henry's constant for carbon dioxide in water
Lisal, Martin
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 for each species. Carbon dioxide is modelled by two three-site (EPM2, and Errington and Panagiotopoulos
33 CFR 80.515 - Cape Henry, VA to Cape Hatteras, NC.
Code of Federal Regulations, 2010 CFR
2010-07-01
...2010-07-01 2010-07-01 false Cape Henry, VA to Cape Hatteras, NC. 80.515 Section...Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY... Fifth District 80.515 Cape Henry, VA to Cape Hatteras,...
Can hyperbolic phase of Brans-Dicke field account for Dark Matter?
M. Arik; M. Calik; F. Cifter
2008-09-10
We show that the introduction of a hyperbolic phase for Brans-Dicke (BD) field results in a flat vacuum cosmological solution of Hubble parameter H and fractional rate of change of BD scalar field, F which asymptotically approach constant values. At late stages, hyperbolic phase of BD field behaves like dark matter.
Effects of Dicke superradiance in context of the one-atom maser
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.
S. Kozyrev
2003-04-08
We discuss stability of spherically symmetric static solutions in Newtonian limit of Jordan, Brans-Dicke field equations. The behavior of the stable equilibrium solutions for the spherically symmetric configurations considered here, it emerges that the more compact a model is, the more stable it is. Moreover, linear stability analysis shows the existence of stable configurations for any polytropic index.
Observation of two visible Dicke-superradiant transitions in atomic europium (*)
Boyer, Edmond
L-123 Observation of two visible Dicke-superradiant transitions in atomic europium (*) C visible pour les raies de l'europium 03BB = 557,7 nm et 03BB = 545,3 nm. Le caractre superradiant de report the first experimental evidence of visible superradiance for the europium lines at 03BB = 557.7 nm
NASA Astrophysics Data System (ADS)
Katore, S. D.; Sancheti, M. M.; Sarkate, N. K.
2014-09-01
We study the spatially homogeneous Kaluza-Klein cosmological model with magnetized anisotropic fluid in the scalar tensor theory of gravitation proposed by Brans-Dicke [1]. Exact solutions of the models are obtained by Volumetric exponential and power law expansion. The Physical behaviors of the models have been discussed using some physical quantities.
Molecular chaperones and the stress of oncogenesis Dick D Mosser*,1
Morimoto, Richard
Molecular chaperones and the stress of oncogenesis Dick D Mosser*,1 and Richard I Morimoto2 1 and client proteins in vivo, and that chaperones can stabilize mutations that affect the folded conformation. The involvement of chaperones, therefore, in such diverse roles might suggest novel anticancer ther- apeutic
Design of Bulk Railway Terminals for the Shale Oil and Gas Industry C. Tyler Dick1
Barkan, Christopher P.L.
Page 1 Design of Bulk Railway Terminals for the Shale Oil and Gas Industry C. Tyler Dick1 , P.E., M: Railway transportation is playing a key role in the development of many new shale oil and gas reserves in North America. In the rush to develop new shale oil and gas plays, sites for railway transload terminals
Stellar explosion in the weak field approximation of the BransDicke theory
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 BransDicke 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
Stellar explosion in the weak field approximation of the Brans Dicke theory
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
Super- and subradiant emission of two-level systems in the near-Dicke limit
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.
Adequacy of the Dicke model in cavity QED: a counter-"no-go" statement
Andrs 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.
The Life and Times of Dick Ruggles: Gunner on the Atlantic Convoys
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...
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.
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
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
Gauss-Codazzi Formalism to Braneworld Scenario within Brans-Dicke Theory
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.
Gravity in a stabilized brane world model in five-dimensional Brans-Dicke theory
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.
The Life and Times of Dick Ruggles: Gunner on the Atlantic Convoys, Part 2
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...
Philip and Helen Akrigg Compiled by Victoria Blinkhorn and Greg Dick (1987)
Handy, Todd C.
Philip and Helen Akrigg fonds Compiled by Victoria Blinkhorn and Greg Dick (1987) Revised by Cobi Description Philip and Helen Akrigg fonds. 1580-1993. 11.24 m of textual records and other material in 1978. He died in 2001. Helen Brown Akrigg (nee Manning) was born in British Columbia in 1921. She
MOVIE "NEIGHBORHHOD GOVERNMENT IN CHICAGO'S 44TH Alderman Dick Simpson of Chicago's 44th
Illinois at Chicago, University of
MOVIE "NEIGHBORHHOD GOVERNMENT IN CHICAGO'S 44TH WARD" Alderman Dick Simpson of Chicago's 44th Ward support at election time, Alderman Simpson attempted to truly represent his constituents. The democratic issues were openly discussed. Alderman Simpson facilitated dialogues with local government officials
Chameleonic Generalized Brans-Dicke model and late-time acceleration
NASA Astrophysics Data System (ADS)
Farajollahi, H.; Farhoudi, M.; Salehi, A.; Shojaie, H.
2012-01-01
In this paper we consider Chameleonic Generalized Brans-Dicke Cosmology in the framework of FRW universes. The bouncing solution and phantom crossing is investigated for the model. Two independent cosmological tests: Cosmological Redshift Drift (CRD) and distance modulus are applied to test the model with the observation.
Stable formulas in intuitionistic logic Nick Bezhanishvili and Dick de Jongh
Amsterdam, University of
Stable formulas in intuitionistic logic Nick Bezhanishvili and Dick de Jongh August 18, 2014 Abstract NNIL-formulas are propositional formulas that do not allow nest- ing of implication to the left. These formulas were introduced in [16], where it was shown that NNIL-formulas are (up to provable equiva- lence
Henry Charlton Bastian (1837-1915): neglected neurologist and scientist.
Pearce, J M S
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 Royal Society in 1868. In addition to his reputation as a neurological diagnostician and intellectual, he became an advocate of the vexed doctrine of abiogenesis. PMID:20093838
Chang, Zhi-Qiang; Lee, Joong-Su; Hwang, Mi-Hyun; Hong, Joo-Heon; Jung, Hee-Kyoung; Lee, Sam-Pin
2009-01-01
The effect of extracellular ?-(1?3), (1?6)-glucan, produced by Paenibacillus polymyxa JB115, on nitric oxide (NO) production in RAW264.7 macrophages was investigated. ?-glucan induced the production of NO by RAW264.7 macrophages in a concentration- and time-dependent manner. Moreover, ?-glucan stimulation increased the mRNA expression of iNOS, COX-2 and IL-6 in RAW264.7 macrophages in a concentration-dependent manner. PMID:19461214
Huang, C; Li, J; Ding, M; Wang, L; Shi, X; Castranova, V; Vallyathan, V; Ju, G; Costa, M
2001-06-01
Tumor promoting effects of arsenic are believed to be associated with its transactivation activity on transcription factors, such as AP-1 and NFkappaB. However, the results from different groups studying the effects of arsenic on NFkappaB activation are contradictory in different cell models. Since arsenic is a strong skin carcinogen, we have investigated the activation of NFkappaB by arsenic in a mouse skin epidermal cell line, JB6 cells. Exposure of cells to arsenite or arsenate led to NFkappaB transactivation in mouse epidermal JB6 NFkappaB-luciferase reporter stable transfectants, C141 NFkappaB mass1. This induction of NFkappaB activity by arsenic was dose- and time-dependent. The transactivation of NFkappaB by arsenic appeared to be through activation of Erks and JNKs pathways because increased NFkappaB activity by arsenic could be dramatically inhibited by either pre-treatment of cells with PD98059 or overexpression of dominant negative JNK1. That Erks activation is required for arsenic-induced NFkappaB transactivation was further supported by the findings that arsenic-induced NFkappaB transactivation was impaired in JB6 30.7b cells, which were deficient in Erks. PMID:11678607
Brown, Richard S.; Pflugrath, Brett D.; Colotelo, Alison HA; Brauner, Colin J.; Carlson, Thomas J.; Deng, Zhiqun; Seaburg, Adam
2012-06-01
On their seaward migration, juvenile salmonids commonly pass hydroelectric dams. Fish passing by the turbine blade may experience rapid decompression, the severity of which can be highly variable and may result in a number of barotraumas. The mechanisms of these injuries can be due to expansion of existing bubbles or gases coming out of solution; governed by Boyles Law and Henrys Law, respectively. This paper combines re-analysis of published data with new experiments to gain a better understanding of the mechanisms of injury and mortality for fish experiencing rapid decompression associated with hydroturbine passage. From these data it appears that the majority of decompression related injuries are due to the expansion of existing bubbles in the fish, particularly the expansion and rupture of the swim bladder. This information is particularly useful for fisheries managers and turbine manufacturers, demonstrating that reducing the rate of swim bladder ruptures by reducing the frequency of occurrence and severity of rapid decompression during hydroturbine passage could reduce the rates of injury and mortality for hydroturbine passed juvenile salmonids.
Andreas Magun; Klaus Knzi
1971-01-01
The influence of statistical gain fluctuations of the high-frequency amplifier on the sensitivity of a Dicke radiometer with selective videoamplifier is calculated with methods that are used in describing random processes. It is shown that the radiometer sensitivity depends on the power density spectrumSg(f) of the gain fluctuations for a Dicke-radiometer of the zero-balanced as well as the unbalanced type.
Bianchi Type-I Cosmological Model Filled with Viscous Fluid in a Modified Brans-Dicke Cosmology
NASA Astrophysics Data System (ADS)
Rai, P.; Rai, L. N.; Singh, V. K.
2012-07-01
Adding the cosmological term, which is assumed to be variable in Brans-Dicke theory we have discussed about a Bianchi type-I cosmological model filled with viscous fluid with free gravitational field of Petrov type-D. The effect of viscousity on various kinematical parameters has been discussed. Finally, this model has been transformed to the original form (1961) of Brans-Dicke theory including a variable cosmological term.
W.E. Henry Symposium compendium: The importance of magnetism in physics and material science
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.
NASA Astrophysics Data System (ADS)
Baesman, S. M.; Oremland, R. S.
2007-12-01
Previous investigations on the dissimilatory reduction of Te-oxyanions have been constrained by the inhibtory effects of circa 1.0 mM concentrations of either Te(IV) or Te(VI) upon growth of established cultures. Therefore we initiated new enrichments using anoxic Mono Lake mud supplemented with 10 mM Te(IV) as the electron acceptor and lactate as the electron donor. Sediments turned black with time owing to the formation of Te(0), microscopic examination of which confirmed the presence of both shards, rosettes, and nanospheres of Te(0). The enrichment was subcultured several times in liquid medium and then streaked onto solid medium and incubated in an anaerobic chamber. Isolated black colonies were re-streaked several times, and thence inoculated into liquid medium. However, growth in liquid medium required the presence of a small amount of solid phase, which included a plug of either agar, phytagel, or glass beads. Growth resulted in oxidation of lactate to acetate, formate and CO2 with the reduction of Te(IV) to Te(0). The isolate, strain MLTeJB was a non-motile rod that stained Gram positive, and formed copious exogenous deposits of Te(0) nano-shards and rosettes. Further details on the physiology of this organism will be presented.
The tumorigenic characteristics of lime-piper betel quid-transformed JB6 cells.
Lin, Ming-Hsun; Wang, Chau-Jong; Huang, Hui-Pei; Chou, Ming-Yung; Chou, Fen-Pi
2004-03-01
Betel quid chewing is a general oral habit in Taiwan, India, southeastern Asian and South Africa with or without the additive of tobacco, alcohol or lime. In this study, the tumor-promoting neoplastic transformation effect of Lime-Piper betel quid (LPB) was examined on JB6 cells. The treatment of LPB at a high dose (1.0 mg/ml) for over 5 days or at lower doses (0.1, 0.5 mg/ml) for over 15 days induced the formation of transformed foci. The transformed cells showed the characteristics of colony formation in soft agar, higher growth rate and multilayer on culture dish. A two-fold induction of the protein levels of c-fos and c-jun proto-oncogenes was observed in the cells from the 50th passage (Cl1/p50, Cl2/p50 and Cl3/p50), suggesting that LPB-transformed cells were oncogenic. In addition, the LPB-transformed cells possessed an elevated level of c-Myc and an increased cell population distributed in the S phase of the cell cycle. These results demonstrated the promotion effect of LPB and indicate that it could be a tumor promoter. PMID:14576975
The quaternary geomorphology of Scotland: The research contribution of J.B. Sissons
NASA Astrophysics Data System (ADS)
Ballantyne, C. K.; Gray, J. M.
Between 1958 and his retirement in 1982, J.B. Sissons published some 80 articles and two books. The majority of these were devoted to aspects of the Quaternary geomorphology of Scotland, but many of his findings have much wider application. This paper reviews the six main areas in which Sissons made an outstanding research contribution. In approximate chronological order, these were as follows: (i) reassessment of the significance of meltwater channels and related fluvioglacial landforms (1958-1963); (ii) the deciphering of an extremely complex sequence of raised and buried shorelines and associated sea-level changes in eastern Scotland (1962-1972), together with reinterpretation of the age and origin of marine rock-cut platforms in western Scotland (1974-1982); (iii) work on the data banking of borehole records and the relevance of certain aspects of drift stratigraphy to engineering operations (1969-1971); (iv) research on the extent and chronology of the last Scottish ice sheet and associated readvances (1961-1982); (v) the reconstruction of the extent and palaeoclimatic implications of Loch Lomond Stadial glaciers (1972-1982); and (vi) investigation into aspects of landscape evolution in the Glen Roy area, including the formation of former lake shorelines, the catastrophic drainage of former ice dammed lakes and its effects, the interpretation of complex terrace sequences and the discovery of links between deglaciation, unloading, faulting, earthquakes and landslides (1978-1982). This paper also includes a complete list of Sissons' publications.
Calmodulin Involvement in Stress-Activated Nuclear Localization of Albumin in JB6 Epithelial Cells.
Weber, Thomas J.; Negash, Sewite; Smallwood, Heather S.; Ramos, Kenneth S.; Thrall, Brian D.; Squier, Thomas C.
2004-06-15
We report that in response to oxidative stress, albumin is translocated to the nucleus where it binds in concert with known transcription factors to an antioxidant response element (ARE), which controls the expression of glutathione-S-transferase and other antioxidant enzymes, functioning to mediate adaptive cellular responses. To investigate the mechanisms underlying this adaptive cell response, we have identified linkages between calcium signaling and the nuclear translocation of albumin in JB6 epithelial cells. Under resting conditions, albumin and the calcium regulatory protein, calmodulin (CaM), co-immunoprecipitate using antibodies against either protein, indicating a tight association. Calcium activation of CaM disrupts the association between CaM and albumin, suggesting that transient increases in cytosolic calcium levels function to mobilize intracellular albumin to facilitate its translocation into the nucleus. Likewise, nuclear translocation of albumin is induced by exposure of cells to hydrogen peroxide or a phorbol ester, indicating a functional linkage between reactive oxygen species, calcium, and PKC-signaling pathways. Inclusion of an antioxidant enzyme (i.e., superoxide dismutase) blocks nuclear translocation, suggesting that the oxidation of sensitive proteins functions to coordinate the adaptive cellular response. These results suggest that elevated calcium transients, and associated increases in reactive oxygen species, contribute to adaptive cellular responses through the mobilization and nuclear translocation of cellular albumin to mediate the transcriptional regulation of antioxidant responsive elements.
Hamiltonian formulation of Palatini f(R) theories a la Brans-Dicke theory
Olmo, Gonzalo J.; Sanchis-Alepuz, Helios [Departamento de Fisica Teorica and IFIC, Centro Mixto Universidad de Valencia - CSIC, Facultad de Fisica, Universidad de Valencia, Burjassot-46100, Valencia (Spain) and Instituto de Estructura de la Materia, CSIC, Serrano 121, 28006 Madrid (Spain); Institut fuer Physik, Karl-Franzens-Universitaet Graz (Austria)
2011-05-15
We study the Hamiltonian formulation of f(R) theories of gravity both in metric and in Palatini formalism using their classical equivalence with Brans-Dicke theories with a nontrivial potential. The Palatini case, which corresponds to the {omega}=-3/2 Brans-Dicke theory, requires special attention because of new constraints associated with the scalar field, which is nondynamical. We derive, compare, and discuss the constraints and evolution equations for the {omega}=-3/2 and {omega}{ne}-3/2 cases. Based on the properties of the constraint and evolution equations, we find that, contrary to certain claims in the literature, the Cauchy problem for the {omega}=-3/2 case is well formulated and there is no reason to believe that it is not well posed in general.
Spherically symmetric Jordan-Brans-Dicke quantum gravity with de Broglie Bohm pilot wave perspective
Ghaffarnejad, Hossein
2013-01-01
We obtain two dimensional analogue of the Jordan-Brans-Dicke (JBD) gravity action described in four dimensional spherically symmetric curved space time metric. There will be two scalar fields, namely, the Brans Dicke (BD) $\\phi$ and scale factor of 2-sphere part of the space time $\\psi.$ There is obtained a suitable duality transformation between $(\\psi,\\phi)$ and $(\\rho,S)$ where $\\rho$ and $S$ are respectively amplitude and phase part of the corresponding de Broglie pilot wave function $\\Psi(\\rho,S)=\\sqrt{\\rho}e^{iS}.$ There is established covariant conservation of mass-energy current density of particles ensemble $J_a=\\rho\\partial_aS,$ in a particular dynamical conformal frame described by $(\\rho,S).$
NASA Astrophysics Data System (ADS)
Pawar, D. D.; Solanke, Y. S.
2014-09-01
The main purpose of this paper is to explore the solution of Exact Kantowski-Sach cosmological models by using the Brans Dicke Theory of gravitation in the background of anisotropic dark energy. In order to obtain different physically variable models of the universe we have assumed the special law of variation of Hubbles parameter proposed by Berman (Nuovo Cimento B 74:182, 1983) which yields constant deceleration parameter and power law relation between average scale factor R and scalar field f, which has already been used by Johri and Desikan in RW Brans Dicke models. Some physical and geometrical consequences of the models have been carried out by using some physical quantities.
Implementation of the Dicke lattice model in hybrid quantum system arrays.
Zou, L J; Marcos, D; Diehl, S; Putz, S; Schmiedmayer, J; Majer, J; Rabl, P
2014-07-11
Generalized Dicke models can be implemented in hybrid quantum systems built from ensembles of nitrogen-vacancy (NV) centers in diamond coupled to superconducting microwave cavities. By engineering cavity assisted Raman transitions between two spin states of the NV defect, a fully tunable model for collective light-matter interactions in the ultrastrong coupling limit can be obtained. Our analysis of the resulting nonequilibrium phases for a single cavity and for coupled cavity arrays shows that different superradiant phase transitions can be observed using existing experimental technologies, even in the presence of large inhomogeneous broadening of the spin ensemble. The phase diagram of the Dicke lattice model displays distinct features induced by dissipation, which can serve as a genuine experimental signature for phase transitions in driven open quantum systems. PMID:25062180
Holographic dark energy in Brans-Dicke cosmology with Granda-Oliveros cut-off
Mubasher Jamil; Kayoomars Karami; Ahmad Sheykhi; E. Kazemi; Z. Azarmi
2011-11-01
Motivated by the recent works of one of us [1,2] we study the holographic dark energy in Brans-Dicke gravity with the Granda-Oliveros cut-off proposed recently in literature. We find out that when the present model is combined with Brans-Dicke field the transition from normal state where $w_D >-1 $ to the phantom regime where $w_D dark energy can be more easily achieved for than when resort to the Einstein field equations is made. Furthermore, the phantom crossing is more easily achieved when the matter and the holographic dark energy undergo an exotic interaction. We also calculate some relevant cosmological parameters and their evolution.
Dilute gas of ultracold two-level atoms inside a cavity; generalized Dicke model
Jonas Larson; Maciej Lewenstein
2009-06-22
We consider a gas of ultracold two-level atoms confined in a cavity, taking into account for atomic center-of-mass motion and cavity mode variations. We use the generalized Dicke model, and analyze separately the cases of a Gaussian, and a standing wave mode shape. Owing to the interplay between external motional energies of the atoms and internal atomic and field energies, the phase-diagrams exhibit novel features not encountered in the standard Dicke model, such as the existence of first and second order phase transitions between normal and superradiant phases. Due to the quantum description of atomic motion, internal and external atomic degrees of freedom are highly correlated leading to modified normal and superradiant phases.
Implementation of the Dicke Lattice Model in Hybrid Quantum System Arrays
NASA Astrophysics Data System (ADS)
Zou, L. J.; Marcos, D.; Diehl, S.; Putz, S.; Schmiedmayer, J.; Majer, J.; Rabl, P.
2014-07-01
Generalized Dicke models can be implemented in hybrid quantum systems built from ensembles of nitrogen-vacancy (NV) centers in diamond coupled to superconducting microwave cavities. By engineering cavity assisted Raman transitions between two spin states of the NV defect, a fully tunable model for collective light-matter interactions in the ultrastrong coupling limit can be obtained. Our analysis of the resulting nonequilibrium phases for a single cavity and for coupled cavity arrays shows that different superradiant phase transitions can be observed using existing experimental technologies, even in the presence of large inhomogeneous broadening of the spin ensemble. The phase diagram of the Dicke lattice model displays distinct features induced by dissipation, which can serve as a genuine experimental signature for phase transitions in driven open quantum systems.
Interacting new agegraphic dark energy in non-flat Brans-Dicke cosmology
Ahmad Sheykhi
2009-12-19
We construct a cosmological model of late acceleration based on the new agegraphic dark energy model in the framework of Brans-Dicke cosmology where the new agegraphic energy density $\\rho_{D}= 3n^2 m^2_p /\\eta^{2}$ is replaced with $\\rho_{D}= {3n^2\\phi^2}/({4\\omega \\eta^2}$). We show that the combination of Brans-Dicke field and agegraphic dark energy can accommodate $w_D = -1 $ crossing for the equation of state of \\textit{noninteracting} 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. In the limiting case $\\alpha = 0$ $(\\omega\\to \\infty)$, all previous results of the new agegraphic dark energy in Einstein gravity are restored.
Uniqueness of the Machian Solution in the Brans-Dicke Theory
A. Miyazaki
2001-01-29
Machian solutions of which the scalar field exhibits the asymptotic behavior $\\phi =O(\\rho /\\omega)$ are generally explored for the homogeneous and isotropic universe in the Brans-Dicke theory. It is shown that the Machian solution is unique for the closed and the open space. Such a solution is restricted to one that satisfies the relation $GM/c^{2}a=const$, which is fixed to $\\pi $ in the theory for the closed model. Another type of solution satisfying $\\phi =O(\\rho /\\omega)$ with the arbitrary coupling constant $% \\omega $ is obtained for the flat space. This solution has the scalar field $% \\phi \\propto \\rho t^{2}$ and also keeps the relation $GM/c^{2}R=const$ all the time. This Machian relation and the asymptotic behavior $\\phi =O(\\rho /\\omega)$ is equivalent to each other in the Brans-Dicke theory.
Improvement of the frequency stability below the Dick limit with a continuous atomic fountain clock.
Devenoges, Laurent; Stefanov, Andr; Joyet, Alain; Thomann, Pierre; Di Domenico, Gianni
2012-02-01
The frequency instability of a shot-noise limited atomic fountain clock is inversely proportional to its signal-tonoise ratio. Therefore, increasing the atomic flux is a direct way to improve the stability. Nevertheless, in pulsed operation, the local oscillator noise limits the performance via the Dick effect. We experimentally demonstrate here that a continuous atomic fountain allows one to overcome this limitation. In this work, we take advantage of two-laser optical pumping on a cold cesium beam to increase the useful fountain flux and, thus, to reduce the frequency instability below the Dick limit. A stability of 6 10(-14)?(-1/2) has been measured with the continuous cesium fountain FOCS-2. PMID:24626029
Integrability vs exact solvability in the quantum Rabi and Dicke models
Murray T. Batchelor; Huan-Qiang Zhou
2015-01-05
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 quantised 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 generalised Rabi model and the fully quantised Dicke model. The integrable points have particular implications for the level statistics of the Dicke model.
Captain Deleuze and the white whale: Melville, moby?dick, and the cartographic inclination
T. Hugh Crawford
1997-01-01
Captain Deleuze and the White Whale: Melville, Moby?Dick, and the Cartographic Inclination; Herman Melville is usually viewed as one of the United States's darker, more brooding authors, but Deleuze, in his many scattered comments on him, finds a strikingly different figure. Clearly Deleuze feels a strong kinship with this 19th?century writer, and he seems to find in Melville a perspective
NASA Astrophysics Data System (ADS)
Biswas, Ritabrata; Debnath, Ujjal
2014-10-01
In Brans-Dicke theory of gravity, from the nature of the scalar field-potential considered, the dark energy, dark matter, radiation densities predicted by different observations and the closedness of the universe considered, we can fix our ? BD , the Brans-Dicke parameter, keeping only the thing in mind that from different solar system constrains it must be greater than 5105. Once we have a value, satisfying the required lower boundary, in our hand we proceed for setting unknown parameters of the different dark energy models' EoS parameter. In this paper we work with three well known red shift parametrizations of dark energy EoS. To constrain their free parameters for Brans Dicke theory of gravity we take twelve point red shift vs Hubble's parameter data and perform ? 2 test. We present the observational data analysis mechanism for Stern, Stern+BAO and Stern+BAO+CMB observations. Minimising ? 2, we obtain the best fit values and draw different confidence contours. We analyze the contours physically. Also we examine the best fit of distance modulus for our theoretical models and the Supernovae Type Ia Union2 sample. For Brans Dicke theory of gravity the difference from the mainstream confidence contouring method of data analysis id that the confidence contours evolved are not at all closed contours like a circle or a ellipse. Rather they are found to be open contours allowing the free parameters to float inside a infinite region of parameter space. However, negative EoSs are likely to evolve from the best fit values.
Anisotropic Dark Energy Bianchi Type III Cosmological Models in Brans Dicke Theory of Gravity
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.
Role of Chameleon Field in presence of Variable Modified Chaplygin gas in Brans-Dicke Theory
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 $\\phi$.
Scaling behavior of the quantum fisher information in the Dicke model
Yu-Yu Zhang
2015-03-19
Quantum Fisher information to the X states of the collective atom ensemble and the scaled quantum fisher information of the atomic subsystem are evaluated in the Dicke Hamiltonian. Critical behavior of the two kinds of Fisher information are in accordant with the analytical results in the thermodynamic limit. Finite-size scaling is analyzed with the large accessible system size due to the effective technique proposed previously. Scaling exponents of the quantum Fisher information are obtained exactly.
Dicke model and environment-induced entanglement in ion-cavity QED
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.
Magnetized anisotropic Bianchi VI0 cosmology in Brans-Dicke gravity
NASA Astrophysics Data System (ADS)
Sharif, M.; Shafique, Imrana
2014-02-01
In this work, we present exact solutions of Brans-Dicke field equations with self-interacting potential U for the Bianchi type cosmological model filled with magnetized anisotropic matter contents. For this purpose, we use the variation law of the Hubble parameter and its resulting exponential as well as power law volumetric expansions. It is concluded that both the resulting models indicate expanding behavior of the universe with isotropic nature ( , in the presence of magnetized anisotropic fluid.
On the Cosmological Constant in Quantum Cosmology of the Brans-Dicke Theory
NASA Astrophysics Data System (ADS)
Zhu, Zong-Hong; Zhang, Yuan-Zhong; Wu, Xiang-Ping
We study the issue of the cosmological constant in quantum cosmology combined with the Brans-Dicke gravitational theory. Using the minisuperspace approximation, we build up the Wheeler-De Witt equation and then obtain the wave function of the universe by further assuming the WKB approximation under the boundary condition proposed by Vilenkin. It is shown that the amplitude of the resulting wave function, which represents an expanding universe, reaches its peaks if the cosmological constant vanishes.
Biswas, Ritabrata
2013-01-01
In Brans Dicke theory of gravity, from the nature of the scalar field-potential considered, the dark energy, dark matter, radiation densities predicted by different observations and the closedness of the universe considered, we can fix our $\\omega_{BD}$, the Brans Dicke parameter, keeping only the thing in mind that from different solar system constrains it must be greater than $5\\times 10^{5}$. Once we have a value, satisfying the required lower boundary, in our hand we proceed for setting unknown parameters of the different dark energy models' EoS parameter. In this paper we work with three well known red shift parametrizations of dark energy EoS. To constrain their free parameters for Brans Dicke theory of gravity we take twelve point red shift vs Hubble's parameter data and perform $\\chi^{2}$ test. We present the observational data analysis mechanism for Stern, Stern+BAO and Stern+BAO+CMB observations. Minimising $\\chi^2$, we obtain the best fit values and draw different confidence contours. We analyze th...
A Look at the Abandoned Contributions to Cosmology of Dirac, Sciama and Dicke
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.
On Reading, Writing, and Computers: A Conversation with John Martin Henry.
ERIC Educational Resources Information Center
Brandt, Ron, Ed.
1981-01-01
With a simplified alphabet and interactive computer programing, John Henry Martin has developed a system by which children can learn to read and write far better than usual. In this interview, he explains his approach. (Author/MLF)
HABS DC,WASH,515A (sheet 1 of 4) Captain Henry Saunders ...
HABS DC,WASH,515A- (sheet 1 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
"Art is a Hardy Plant:" : Benjamin Henry Latrobe and the cultivation of a transitional aesthetics
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. ...
Abrams, Aaron
DISTRIBUTIONS OF ORDER PATTERNS OF INTERVAL MAPS AARON ABRAMS, ERIC BABSON, HENRY LANDAU, ZEPH. Work of C. Bandt, G. Keller, B. Pompe, J. M. Amig´o, M. Kennel, and M. Misiurewicz [3, 4, 2, 8] relates
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 ...
The Delusion of the Master: The last days of Henry James Word count: 1930 words.
by his older and idolized mentor to renounce his projects of marrying a charming young lady, in order the American-born Henry himself. After 30 years, he returns to his old home in New York. He keeps wondering
Eichenberger, Kurt Frederick
1982-01-01
The design and building process of Dr. Henry Chapman Mercer is explored for its relationship to vernacular design. The vehicle for this exploration is 'Fonthill,' the home of Dr. Mercer constructed by him in 1908. Complete ...
Mythologies of an American everyday landscape : Henry Ford at the Wayside Inn
Wortham, Brooke Danielle
2006-01-01
Ford purchased property in 1923 in Sudbury, Massachusetts in order to preserve an historic inn associated with the poet Henry Wadsworth Longfellow. Over the next twenty years, his mission expanded to create an idealized ...
STIMULATION OF GEOTHERMAL AQUIFERS Paul Kruger and Henry J. Ramey, J r .
Stanford University
. STIMULATION OF GEOTHERMAL AQUIFERS Paul Kruger and Henry J. Ramey, J r . Co o f Geothermal Formations . . . . . . . . 6 Table 2: Water Quali t y Constituents-Water Distribution Coefficients . . . . . . . . 62 Table 7: Gaseous Constituents i n Geothermal Fluids . . . . . . 64
HENRY'S FORK AND SNAKE RIVER BASIN, IDAHO - WATER QUALITY REPORT, 1973
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...
Harold Varmus Awarded Henry G. Friesen International Prize in Health Research
Harold Varmus was awarded the 2008 Henry G. Friesen International Prize in Health Research on September 24 in Toronto. Henry Friesen is a Canadian endocrinologist credited with the discovery of human prolactin. The prize, established in 2005, acknowledges Dr. Friesen's achievements in health research and health research policy. This year's award recognized Dr. Varmus' leadership and innovative contributions to medical research and his promotion of science over four decades.
Wang, Ling; Zhang, Chengyue; Guo, Yue; Su, Zheng-Yuan; Yang, Yuqing; Shu, Limin; Kong, Ah-Ng Tony
2014-11-01
Increasing numbers of natural products have been found to possess anticancer effects. Nuclear factor erythroid-2-related factor-2 (Nrf2) is a master regulator of the antioxidative stress response, and our previous studies found that epigenetic modification of the Nrf2 gene appears to be a critical mechanism. Salvia miltiorrhiza, a Chinese herbal medicine widely used in Asian countries, has been shown to possess anticancer and antioxidant effects. Tanshinone IIA (TIIA), an active component in S. miltiorrhiza, has been reported to activate Nrf2 pathway. The objective of this study was to investigate the epigenetic regulation of Nrf2 by TIIA in mouse skin epidermal JB6 cells and the functional consequences for cell transformation. TIIA was found to induce antioxidant response element-luciferase and upregulate the mRNA and protein levels of Nrf2 and Nrf2 downstream target genes HO-1 and NQO-1. TIIA decreased the colony formation of JB6 cells by approximately 80%. TIIA decreased the protein levels of DNMT1, DNMT3a, DNMT3b, and HDAC3 and inhibited the enzymatic activity of HDACs. Bisulfite genomic sequencing indicated that TIIA demethylated the first five CpGs in the promoter region of the Nrf2 gene. Chromatin immunoprecipitation assays showed that TIIA treatment increased the recruitment of RNA polymerase II at Nrf2 transcription start site but had limited effects on enrichment of Ac-H3 in Nrf2 promoter. Taken together, our results show that TIIA activates the Nrf2 signaling pathway and induces epigenetic demethylation of the CpGs of Nrf2. The epigenetic reactivation of the Nrf2 signaling pathway by TIIA could potentially contribute to the attenuation of JB6 cellular transformation and anticancer effects. PMID:25274607
Konieczna, Patrycja; Schiavi, Elisa; Ziegler, Mario; Groeger, David; Healy, Selena; Grant, Ray; OMahony, Liam
2015-01-01
The microbiota is required for optimal host development and ongoing immune homeostasis. Lactobacilli are common inhabitants of the mammalian large intestine and immunoregulatory effects have been described for certain, but not all, strains. The mechanisms underpinning these protective effects are beginning to be elucidated. One such protective organism is Lactobacillus rhamnosus JB-1 (Lb. rhamnosus JB-1). Lb. murinus has no such anti-inflammatory protective effects and was used as a comparator organism. Human monocyte-derived dendritic cells (MDDCs) were co-incubated with bacteria and analysed over time for bacterial adhesion and intracellular processing, costimulatory molecule expression, cytokine secretion and induction of lymphocyte polarization. Neutralising antibodies were utilized to identify the responsible MDDC receptors. Lb. rhamnosus JB-1 adhered to MDDCs, but internalization and intracellular processing was significantly delayed, compared to Lb. murinus which was rapidly internalized and processed. Lb. murinus induced CD80 and CD86 expression, accompanied by high levels of cytokine secretion, while Lb. rhamnosus JB-1 was a poor inducer of costimulatory molecule expression and cytokine secretion. Lb. rhamnosus JB-1 primed MDDCs induced Foxp3 expression in autologous lymphocytes, while Lb. murinus primed MDDCs induced Foxp3, T-bet and Ror-?t expression. DC-SIGN was required for Lb. rhamnosus JB-1 adhesion and influenced IL-12 secretion, while TLR-2 influenced IL-10 and IL-12 secretion. Here we demonstrate that the delayed kinetics of bacterial processing by MDDCs correlates with MDDC activation and stimulation of lymphocytes. Thus, inhibition or delay of intracellular processing may be a novel strategy by which certain commensals may avoid the induction of proinflammatory responses. PMID:25816321
Konieczna, Patrycja; Schiavi, Elisa; Ziegler, Mario; Groeger, David; Healy, Selena; Grant, Ray; O'Mahony, Liam
2015-01-01
The microbiota is required for optimal host development and ongoing immune homeostasis. Lactobacilli are common inhabitants of the mammalian large intestine and immunoregulatory effects have been described for certain, but not all, strains. The mechanisms underpinning these protective effects are beginning to be elucidated. One such protective organism is Lactobacillus rhamnosus JB-1 (Lb. rhamnosus JB-1). Lb. murinus has no such anti-inflammatory protective effects and was used as a comparator organism. Human monocyte-derived dendritic cells (MDDCs) were co-incubated with bacteria and analysed over time for bacterial adhesion and intracellular processing, costimulatory molecule expression, cytokine secretion and induction of lymphocyte polarization. Neutralising antibodies were utilized to identify the responsible MDDC receptors. Lb. rhamnosus JB-1 adhered to MDDCs, but internalization and intracellular processing was significantly delayed, compared to Lb. murinus which was rapidly internalized and processed. Lb. murinus induced CD80 and CD86 expression, accompanied by high levels of cytokine secretion, while Lb. rhamnosus JB-1 was a poor inducer of costimulatory molecule expression and cytokine secretion. Lb. rhamnosus JB-1 primed MDDCs induced Foxp3 expression in autologous lymphocytes, while Lb. murinus primed MDDCs induced Foxp3, T-bet and Ror-?t expression. DC-SIGN was required for Lb. rhamnosus JB-1 adhesion and influenced IL-12 secretion, while TLR-2 influenced IL-10 and IL-12 secretion. Here we demonstrate that the delayed kinetics of bacterial processing by MDDCs correlates with MDDC activation and stimulation of lymphocytes. Thus, inhibition or delay of intracellular processing may be a novel strategy by which certain commensals may avoid the induction of proinflammatory responses. PMID:25816321
The Stellar Environment of SN 2008jb: Resolving the Nature of the Progenitor
NASA Astrophysics Data System (ADS)
Prieto, Jose
2012-10-01
Type IIP supernovae, the most common kind of core-collapse supernova {ccSN} explosions, have been associated with the deaths of red-supergiant stars with main sequence masses M = 8-15 Msun, through the direct detection of several progenitors using HST. These studies have also shown a dearth of high-mass {40 > M > 15 Msun} SN progenitor stars when compared to local populations of supergiants. However, the sample of nearby ccSNe {< 20 Mpc} used for progenitor studies is highly biased to large spiral galaxies, limiting the range of physical properties {like metallicity} that affect stellar evolution. We propose to obtain deep multi-color images with WFC3 of the birthplace of SN 2008jb to study its resolved stellar environment and constrain the age and mass of its progenitor. This ccSN was discovered by a galaxy-unbiased survey in a low-metallicity, Magellanic-type dwarf irregular galaxy at 10 Mpc. The photometric light curve properties of the event were consistent with normal Type IIP SNe; however, the explosion occurred within a large star-forming region. The approximate age of this region of 9 Myr is more consistent with the young age and high-mass estimated for the progenitor of SN 1987A in the LMC, than with any nearby Type IIP SN. The deep optical and near-IR HST data will allow us to detect massive stars in the environment of SN 2008fb and accurately constrain the ages of the stellar populations using well-calibrated stellar evolution and population synthesis models. These data will also allow us to constrain the late-time SN energetics, dust formation in the SN ejecta or circumstellar medium, and stellar feedback from massive stars and SNe in the star-forming region.
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
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
Henry Duret (1849-1921): a surgeon and forgotten neurologist.
Walusinski, Olivier; Courrivaud, Philippe
2014-01-01
Henri Duret (1849-1921) was a surgeon whose training started in the laboratory of Jean-Martin Charcot and Alfred Vulpian at La Salptrire in 1874. Using injections of colored gelatine, Duret was the first to describe the distribution of supply arteries in the brainstem and then in the cortex. His descriptions correlated irrigated territories, infarcted zones and secondary neurological deficits. He focused his 1878 thesis on experimental studies of brain trauma and localized the origin of disturbances in autonomic function and vigilance to the brainstem. He linked these disturbances to microhemorrhages affecting the medulla and pons, which are now known as Duret hemorrhages. Over 40 years, he authored numerous publications on digestive and gynecological surgery and on teaching in these areas. In 1905, another of his innovative works was published, which covered brain tumours, their clinical manifestations, the pathophysiological consequences of intracranial hypertension and the corresponding surgical treatments. This little-known treatise is in fact a pioneering work in neurosurgery, published well before the more familiar works of Victor Horsley and Harvey Cushing. PMID:25227400
Henri Victor Regnault: Experimentalist of the Science of Heat
NASA Astrophysics Data System (ADS)
Reif-Acherman, Simn
2010-12-01
Henri Victor Regnault (1810-1878) was one of the most famous French experimental scientists of the nineteenth century. After studying and carrying out research at the cole Polytechnique and the cole des Mines in Paris, he was elected to the Paris Acadmie des Sciences in 1840 and was appointed Professor of Experimental Physics at the Collge de France in 1841. His initial researches were in chemistry, but his careful experimental investigations of the law of the specific heat of solids that Pierre Louis Dulong (1785-1838) and Alexis Thrse Petit (1791-1820) proposed in 1818 opened the door to his transition to physics and to his pioneering experimental researches on various thermodynamic properties of liquids and gases. I focus particularly on his investigations on the expansion, compressibility, vapor pressure, and speed of sound in gases. He also made important contributions to the new art of photography and to the ceramic industry as director of the Svres factory, at a time when his personal life was filled with tragedy. While his experimental work was acclaimed by his contemporaries, it has been largely neglected by scientists and historians today.
The enigmatic figure of Dr Henry Maudsley (1835-1918).
Pantelidou, Maria; Demetriades, Andreas K
2014-08-01
In spite of his contribution to psychiatry in 19th century Britain, Henry Maudsley remains a mysterious figure, a man mostly known for his donation to the London County Council for the building of the Maudsley Hospital and for The Maudsley Annual Lecture created in honour of his benevolence. Besides Sir Aubrey Lewis' article in 1951 and Michael Collie's attempt in 1988 to construct a biographical study on Maudsley, there does not seem to be any current endeavour to tell the story of his life, whereas Trevor Turner's contribution to the 2004 Oxford Dictionary of National Biography gives a somewhat scathing but unattributed account of Maudsley's personality. This essay attempts to explore his contributions to the Medico-Psychological Association (MPA), the current Royal College of Psychiatrists, his editorship of the Journal of Mental Health (currently named the British Journal of Psychiatry), his literary contributions and his vision for a psychiatric hospital. This essay is an attempt to demystify his figure and to explore some of the rumours and criticisms surrounding his name and the reasons why so little has been written about him. It is also a venture to unravel his complex personality and his intricate philosophy. PMID:24944050
Sudipto Roy; Surajit Chattopadhyay; Antonio Pasqua
2013-12-10
The present paper reports a study on the dimensionless parameter $\\omega$ in Brans-Dicke theory. Based on a particular choice of scale factor $a$, we have investigated the signature flip of the deceleration parameter $q$ to see whether the transition from decelerated to accelerated expansion of the universe is achievable under this choice of scale factor. Restrictions on the parameters obtained for this choice of scale factor have been subsequently used for discussing the Brans-Dicke parameter for two choices of scalar fields $\\phi$. Moreover, analytical solutions for the Brans-Dicke parameter without any assumption about the scalar field have been obtained from the modified field equations through the choice of scale factor under consideration. Viable models have been obtained by comparing the results with observations.
Skrypnyk, T. [International School for Advanced Studies, via Beirut 2-4, 34014 Trieste (Italy) and Bogoliubov Institute for Theoretical Physics, Metrologichna st.14-b, Kiev 03143 (Ukraine)
2009-10-15
We analyze symmetries of the integrable generalizations of Jaynes-Cummings and Dicke models associated with simple Lie algebras g and their reductive subalgebras g{sub K}[T. Skrypnyk, 'Generalized n-level Jaynes-Cummings and Dicke models, classical rational r-matrices and nested Bethe ansatz', J. Phys. A: Math. Theor. 41, 475202 (2008)]. We show that their symmetry algebras contain commutative subalgebras isomorphic to the Cartan subalgebras of g, which can be added to the commutative algebras of quantum integrals generated with the help of the quantum Lax operators. We diagonalize additional commuting integrals and constructed with their help the most general integrable quantum Hamiltonian of the generalized n-level many-mode Jaynes-Cummings and Dicke-type models using nested algebraic Bethe ansatz.
van Hoof, Ambro
not been well defined. Utilizing a monoclonal antibody developed against the Enterococcus faecalis major of regulation of pilus production in Gram-positive pathogens. Enterococcus faecalis, a normal commensal.1128/JB.00725-10 Copyright © 2010, American Society for Microbiology. All Rights Reserved. Enterococcus
Jiang, Wenyan; Zhao, Jingbo; Wang, Zhongqiang; Yang, Shang-Tian
2014-07-01
The production of n-butanol, a widely used industrial chemical and promising transportation fuel, from abundant, low-cost substrates, such as sugarcane juice, in acetone-butanol-ethanol (ABE) fermentation was studied with Clostridium acetobutylicum JB200, a mutant with high butanol tolerance and capable of producing high-titer (>20 g/L) n-butanol from glucose. Although JB200 is a favorable host for industrial bio-butanol production, its fermentation performance with sucrose and sugarcane juice as substrates has not been well studied. In this study, the long-term n-butanol production from sucrose by JB200 was evaluated with cells immobilized in a fibrous-bed bioreactor (FBB), showing stable performance with high titer (16-20 g/L), yield (? 0.21 g/g sucrose) and productivity (? 0.32 g/Lh) for 16 consecutive batches over 800 h. Sugarcane thick juice as low-cost substrate was then tested in 3 consecutive batches, which gave similar n-butanol production, demonstrating that JB200 is a robust and promising strain for industrial ABE fermentation. PMID:24811445
Nizet, Victor
is required for capsule polymerization and export in group B Streptococcus and Streptococcus pneumoniae.1128/JB.01175-06 Copyright © 2007, American Society for Microbiology. All Rights Reserved. Streptococcus of the fish pathogen Streptococcus iniae, though indirect evidence suggests that capsule could represent
Hazen, Terry
.1128/JB.01921-05 Copyright 2006, American Society for Microbiology. All Rights Reserved. Salt Stress hyperionic stress. Several efflux systems were also highly up-regulated, as was the ATP synthesis pathway. Increases in the levels of both RNA and DNA helicases suggested that salt stress affected the stability
Holden, James F.
.1128/JB.00138-06 Copyright 2006, American Society for Microbiology. All Rights Reserved. Citric Acid The hyperthermophilic archaeon Pyrobaculum islandicum uses the citric acid cycle in the oxidative and reductive in the central metabolism of P. islandicum were regulated under the three different growth conditions. Pyruvate
Sambridge, Malcolm
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 110, B03206, DOI:10.1029/2004JB003268, 2005 Finding realistic and appraisal. The appraisal stage involves calculations of model marginal probability density functions using, advances in computer performance and modeling techniques are making detailed inversions practicable
Sandiford, Mike
N. Jb. Miner. Mh. Jg. 1985, H. 9 Stuttgart, September 1985 Staurolite in a garnet - hornblende - garnet - biotite - quartz assemblage that formed at an early stage in the Cambro-Ordovician Ross substitution relating the staurolite compositions is IVSi4++ 02- = IVA]3+ + OH-o Garnet [Mg/(Mg+Fe) = 0.39 core
Merrick, Mike
.1128/JB.00824-09 Copyright 2009, American Society for Microbiology. All Rights Reserved. Organophosphate in the signal peptide of the membrane-associated organophosphate hydrolase (OPH) of Brevundimonas diminuta that targets cytoplasmic proteins to the ClpXP protease. Bacterial organophosphate hydrolases (OPH), also known
Ekinci, M S; McCrae, S I; Flint, H J
1997-01-01
Streptococcus bovis JB1 was found to produce a 25-kDa extracellular enzyme active against beta-(1,3-1,4)-glucans. A gene was isolated encoding a specific beta-(1,3-1,4)-glucanase that corresponds to this size and belongs to glycoside hydrolase family 16. A 4- to 10-fold increase in supernatant beta-glucanase activity was obtained when the cloned beta-glucanase gene was reintroduced into S. bovis JB1 by use of constructs based on the plasmid vector pTRW10 or pIL253. The beta-(1,3-1,4)-glucanase gene was also expressed upon introduction of the pTRW10 construct pTRWL1R into Lactococcus lactis IL2661 and Enterococcus faecalis JH2-SS, although extracellular activity was 8- to 50-fold lower than that in S. bovis JB1. The beta-(1,3-1,4)-glucanase purified from the culture supernatant of S. bovis JB1 carrying pTRWL1R showed a K(m) of 2.8 mg per ml and a Vmax of 338 mumol of glucose equivalents per min per mg of protein with barley beta-glucan as the substrate. The S. bovis beta-(1,3-1,4)-glucanase may contribute to the ability of this bacterium to utilize starch by degrading structural polysaccharides present in endosperm cell walls. PMID:9327538
PPN parameter {gamma} and solar system constraints of massive Brans-Dicke theories
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.
Kasner Solution in Brans-Dicke Theory and its Corresponding Reduced Cosmology
S. M. M. Rasouli
2014-05-26
We present a brief review of the modified Brans-Dicke theory (MBDT) in arbitrary dimensions, whereby the ($N+1$)-dimensional field equations reduce to the $N$-dimensional $(ND)$ configuration with sources and an effective induced scalar potential. We then investigate a generalized Bianchi type~I anisotropic cosmology in $5D$ BD theory that leads to an extended Kasner solution. By employing the original equations of MBDT, we probe the reduced Kasner cosmology on the hypersuface with proceeding the investigations for a few cosmological quantities, explaining their properties for some cosmological models.}
Hamilton-Jacobi Equation for Brans-Dicke Theory and Its Long-wavelength Solution
Jiro Soda; Hideki Ishihara; Osamu Iguchi
1995-09-06
Hamilton-Jacobi equation for Brans-Dicke theory is solved by using a long-wavelength approximation. We examine the non-linear evolution of the inhomogeneities in the dust fluid case and the cosmological constant case. In the case of dust fluid, it turns out that the inhomogeneities of space-time grow. In the case of cosmological constant, the inhomogeneities decay, which is consistent with the cosmic no hair conjecture. The inhomogeneities of the density perturbation and the gravitational constant behave similarly with that of space-time.
Propagation of quantum particles in Brans-Dicke spacetime. The case of Gamma Ray Bursts
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.
Propagation of quantum particles in Brans-Dicke spacetime. The case of Gamma Ray Bursts
S. Capozziello; G. Lambiase
2015-01-22
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.
Inflationary phase in Brans-Dicke cosmology with a cosmological constant
NASA Astrophysics Data System (ADS)
Berman, Marcelo Samuel
1989-12-01
It has been shown earlier that, for a perfect fluid, a perfect gas law of state, and the Robertson-Walker metric, an exponential phase in Brans-Dicke cosmology is possible, with both positive pressure and density, but not with the violated energy condition p = -?. We demonstrate in this paper that the inclusion of a cosmological constant into the theory does not change that picture. Permanent address: Departamento de Ciencias Exatas da Faculdade de Filosofia, Ceincias e Letras da FURJ, Joinville, SC 89200, Brazil.
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).
Simulation of Jahn-Teller-Dicke Magnetic Structural Phase Transition with Trapped Ions
Peter A. Ivanov; Diego Porras; Svetoslav S. Ivanov; Ferdinand Schmidt-Kaler
2012-07-02
We study theoretically the collective E$\\otimes$e Jahn-Teller-Dicke distortion in a system of trapped ions. We focus in the limit of infinite range interactions in which an ensemble of effective spins interacts with two collective vibrational modes with U(1) symmetric couplings. Our model is exactly solvable in the thermodynamical limit and it is amenable to be solved by exact numerical diagonalization for a moderate number of ions. We show that trapped ions are ideally suited to study the emergence of spontaneous symmetry breaking of a continuous symmetry and magnetic structural phase transition in a mesoscopic system.
Comment on "Exploring chaos in the Dicke model using ground-state fidelity and Loschmidt echo"
NASA Astrophysics Data System (ADS)
Garca-Mata, Ignacio; Roncaglia, Augusto J.; Wisniacki, Diego A.
2015-03-01
In a recent paper [Phys. Rev. E 90, 022920 (2014), 10.1103/PhysRevE.90.022920] a study of the ground-state fidelity of the Dicke model as a function of the coupling parameter is presented. Abrupt jumps of the fidelity in the superradiant phase are observed and are assumed to be related to the transition to chaos. We show that this conclusion results from a misinterpretation of the numerics. In fact, if the parity symmetry is taken into account, the unexpected jumps disappear.
Instability Analysis of Cylindrical Stellar Object in Brans-Dicke Gravity
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.
Minimally interacting holographic Dark energy model in Brans-Dicke theory
NASA Astrophysics Data System (ADS)
Kiran, M.; Reddy, D. R. K.; Rao, V. U. M.
2015-04-01
In this paper, we have studied the anisotropic and homogeneous Bianchi type-V universe filled with two minimally interacting fields, matter and holographic dark energy components in the frame work of Brans and Dicke (Phys. Rev. 124:925, 1961) theory of gravitation. To obtain a determinate solution of the field equations we have used (i) the scalar expansion is proportional to the shear scalar and (ii) special law of variation for Hubble's parameter proposed by Berman (Nuovo Cimento B 74:182, 1983). Some physical and kinematical properties of the model are also discussed.
The Open-System Dicke-Model Quantum Phase Transition with a Sub-Ohmic Bath
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.
Large Dynamical System Analysis for Anisotropic Universe in Brans-Dicke Theory
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.
Extended JC-Dicke model for a two-component atomic BEC inside a cavity
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.
Quantum Entanglement in Spinor Bose-Einstein Condensates and the Preparation of Dicke State
NASA Astrophysics Data System (ADS)
Zhang, Zhen; Duan, Luming
2012-06-01
The spin-1 Bose Einstein Condensate system can exhibit many interesting phenomena under the effect of linear and quadratic Zeeman effects, resulting from the rich spin texture and the long range correlation in the system. The manybody ground state is shown and phase transition and entanglement properties are discribed. We also propose a method to prepare the Dicke state, with time evolution from a state relatively easy to realise from current experimental cooling methods. The entanglement depth, which based only on the measuring of collective spin operators, is used to characterise the entanglement in the final prepared state. Various noises in the preparation process are also discussed.
Big-bang nucleosynthesis in Brans-Dicke cosmology with a varying $?$ term related to WMAP
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.
PPN Parameter $?$ and Solar System Constraints of Massive Brans-Dicke Theories
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 $m \\gsim 20 \\times m_{AU}= 20\\times 10^{-27}GeV$.
Shear and vorticity in a combined Einstein-Cartan-Brans-Dicke inflationary lambda-Universe
NASA Astrophysics Data System (ADS)
Berman, Marcelo Samuel
2008-04-01
A combined BCDE (Brans-Dicke and Einstein-Cartan) theory with lambda-term is developed through Raychaudhuris equation, for inflationary scenario. It involves a variable cosmological constant, which decreases with time, jointly with energy density, cosmic pressure, shear, vorticity, and Hubbles 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 the angular speed does not (Astrophys. Space Sci. 312: 275, 2007d).
Snawder, J E
1999-01-01
The anchorage-independent growth of mouse epidermal cells (JB6) exposed to 60-Hz magnetic fields (MF) was investigated. Promotion-responsive JB6 cells were suspended in agar (10(4)cells/plate) and exposed continuously to 0.10 or 0.96 mT, 60-Hz magnetic fields for 10-14 days, with or without concurrent treatment with the tumor promoter tetradecanoylphorbol acetate (TPA). Exposures to MF were conducted in a manner such that the experimenter was blind to the treatment group of the cells. At the end of the exposure period, the anchorage-independent growth of JB6 cells on soft agar was examined by counting the number of colonies larger than 60 microm (minimum of 60 cells). The use of a combined treatment of the cells with both MF and TPA was to provide an internal positive control to estimate the success of the assay and to allow evaluation of co-promotion. Statistical analysis was performed by a randomized block design analysis of variance to examine both the effect of TPA treatment (alone and in combination with MF exposure) and the effect of intra-assay variability. Transformation frequency of JB6 cells displayed a dose-dependent response to increasing concentrations of TPA. Coexposure of cells to both TPA and 0.10 or 0.96 mT, 60-Hz MF did not result in any differences in transformation frequency for any TPA concentrations tested (0-1 ng/ml). These data indicate that exposure to a 0.10 or 0.96 mT, 60-Hz MF does not act as a promoter or co-promoter in promotion-sensitive JB6 cell anchorage-independent growth. Images Figure 1 PMID:10064548
The Works of Henry Moseley, 1887-1915
NASA Astrophysics Data System (ADS)
Scerri, Eric
2013-04-01
In 1913 Henry Moseley, an unknown young English physicist published an article in the Philosophical Magazine under the title of ``The High Frequency Spectra of the Elements.'' The 10-page article was to have far reaching implications in both chemistry and physics and helped to resolve a major conundrum in the periodic table of the elements. The talk will briefly examine the life and work of Moseley who died tragically while fighting in the trenches of World War I in 1915. The build-up to the discovery of atomic number took several different avenues including contributions from Rutherford and Barkla. However the more direct motivation for Moseley's work, as he readily acknowledged, were the articles of an unknown Dutch econometrician Anton Van den Broek who attempted to improve on Mendeleev's periodic table. Moseley began as a student of Rutherford at Manchester and took a keen interest in the development of research using X-rays following the work of Roentgen, von Laue and Bragg. Although Rutherford was at first reluctant to enter this new field he soon yielded to young Moseley's request and sent him to Leeds for brief training with Bragg. On returning to Manchester, Moseley devised an ingenious apparatus in which a set of metal samples could be rotated so as to become the target for a beam of electrons in order to measure the frequencies of the emitted K X-rays. The first set of such experiments used nine successive elements in the periodic table, from titanium to zinc. Moseley's now immense fame rests with the results of this study as well as a subsequent one which extended the study into a further 30 elements, in addition to the use that his method was put to by himself as well as subsequent chemists and physicists.
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
Kamira Henry (Binga) Haggie Scholarship 2014 R E G U L A T I O N S
Waikato, University of
Kamira Henry (Binga) Haggie Scholarship 2014 R E G U L A T I O N S BACKGROUND This Scholarship to the Faculty at the anniversary of his passing, when this Scholarship was established. The Scholarship-Faculty of Law. REGULATIONS 1. The award shall be known as the Kamira Henry (Binga) Haggie Scholarship. 2
Cosmological Constraints on Ghost Dark Energy in the Brans-Dicke Theory by Using MCMC Approach
Alavirad, Hamzeh
2014-01-01
By using a Markov Chain Monte Carlo simulation, we investigate cosmological constraints on the ghost dark energy (GDE) model in the framework of the Brans-Dicke (BD) theory. A combination of the latest observational data of the cosmic microwave background radiation data from seven-year WMAP, the baryon acoustic oscillation data form the SDSS, the supernovae type Ia data from the Union2 and the X-ray gas mass fraction data from the Chandra X-ray observations of the largest relaxed galaxy clusters are used to perform constraints on GDE in the BD cosmology. In this paper, we consider both flat and non-flat universes together with interaction between dark matter and dark energy. The main cosmological parameters are obtained as: $\\Omega_{\\rm b}h^2= 0.0223^{+0.0016}_{-0.0013}$, $\\Omega_{\\rm c}h^2=0.1149^{+0.0088}_{-0.0104}$ and $\\Omega_{\\rm k}=0.0005^{+0.0025}_{-0.0073}$. In addition, the Brans-Dicke parameter $\\omega$ is estimated as $1/\\omega\\simeq 0.002$.
Cosmological constraints on ghost dark energy in the Brans-Dicke theory by using MCMC approach
NASA Astrophysics Data System (ADS)
Alavirad, Hamzeh; Sheykhi, Ahmad
2014-06-01
By using a Markov Chain Monte Carlo simulation, we investigate cosmological constraints on the ghost dark energy (GDE) model in the framework of the Brans-Dicke (BD) theory. A combination of the latest observational data of the cosmic microwave background radiation data from seven-year WMAP, the baryon acoustic oscillation data form the SDSS, the supernovae type Ia data from the Union2 and the X-ray gas mass fraction data from the Chandra X-ray observations of the largest relaxed galaxy clusters are used to perform constraints on GDE in the BD cosmology. In this paper, we consider both flat and non-flat universes together with interaction between dark matter and dark energy. The main cosmological parameters are obtained as: ?bh2=0.0223-0.0013+0.0016, ?ch2=0.1149-0.0104+0.0088 and ?k=0.0005-0.0073+0.0025. In addition, the Brans-Dicke parameter ? is estimated as 1/??0.002.
Holographic dark energy in Brans-Dicke theory with log correction
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 dark energy can be more easily achieved for than when resort to the Einstein field equations is made.
Cosmic microwave background with Brans-Dicke gravity II: constraints with the WMAP and SDSS data
Fengquan Wu; Xuelei Chen
2010-09-10
Using the covariant formalism developed in a companion paper (paper I), we derive observational constraint on the Brans-Dicke model in a flat FLRW universe with cosmological constant and cold dark matter. The CMB observations we use include the WMAP five year data, the ACBAR 2007 data, the CBI polarization data, and the BOOMERanG 2003 flight data. For the large scale structure we use the matter power spectrum data measured with the LRG survey of the SDSS DR4. We parameterize 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 constraint 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 $\\zeta 97.8$). We also obtained constraint on $\\dot{G}/G$, the rate of change of $G$ at present, as $-1.75 \\times 10^{-12} \\yr^{-1}<\\dot{G}/G < 1.05 \\times 10^{-12}\\yr^{-1}$, and $\\delta G/G$, the total variation of $G$ since the epoch of recombination, as $ -0.083 < \\delta{G}/G < 0.095$ at $2\\sigma$ confidence level.
Interacting new agegraphic dark energy in nonflat Brans-Dicke cosmology
Sheykhi, Ahmad [Department of Physics, Shahid Bahonar University, P.O. Box 76175, Kerman (Iran, Islamic Republic of); Research Institute for Astronomy and Astrophysics of Maragha (RIAAM), Maragha (Iran, Islamic Republic of)
2010-01-15
We construct a cosmological model of late acceleration based on the new agegraphic dark energy model in the framework of Brans-Dicke cosmology where the new agegraphic energy density {rho}{sub D}=3n{sup 2}m{sub p}{sup 2}/{eta}{sup 2} is replaced with {rho}{sub D}=3n{sup 2{phi}2}/(4{omega}{eta}{sup 2}). We show that the combination of the Brans-Dicke field and agegraphic dark energy can accommodate a w{sub D}=-1 crossing for the equation of state of noninteracting dark energy. When an interaction between dark energy and dark matter is taken into account, the transition of w{sub D} to the phantom regime can be more easily accounted for than when we resort to the Einstein field equations. In the limiting case {alpha}=0 ({omega}{yields}{infinity}), all previous results of the new agegraphic dark energy in Einstein gravity are restored.
Quantum computation with two-level trapped cold ions beyond Lamb-Dicke limit
NASA Astrophysics Data System (ADS)
Wei, L. F.; Liu, S. Y.; Lei, X. L.
2002-06-01
We propose a simple scheme for implementing quantum logic gates with a string of two-level trapped cold ions outside the Lamb-Dicke limit. Two internal states of each ion are used as one computational qubit (CQ) and the collective vibration of ions acts as the information bus, i.e., the bus qubit (BQ). Using the quantum dynamics for the laser-ion interaction as described by a generalized Jaynes-Cummings model, we show that quantum entanglement between any one CQ and the BQ can be coherently manipulated by applying classical laser beams. As a result, universal quantum gates, i.e., the one-qubit rotation and two-qubit controlled gates, can be implemented exactly. The required experimental parameters for the implementation, including the Lamb-Dicke (LD) parameter and the durations of the applied laser pulses, are derived. Neither the LD approximation for the laser-ion interaction nor the auxiliary atomic level is needed in the present scheme.
Dick effect in a pulsed atomic clock using Coherent Population Trapping
Danet, Jean-Marie; Gurandel, Stphane; 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 ...
Gravitational radiation from compact binary systems in the massive Brans-Dicke theory of gravity
NASA Astrophysics Data System (ADS)
Alsing, Justin; Berti, Emanuele; Will, Clifford M.; Zaglauer, Helmut
2012-03-01
We derive the equations of motion, the periastron shift, and the gravitational radiation damping for quasicircular compact binaries in a massive variant of the Brans-Dicke theory of gravity. We also study the Shapiro time delay and the Nordtvedt effect in this theory. By comparing with recent observational data, we put bounds on the two parameters of the theory: the Brans-Dicke coupling parameter ?BD and the scalar mass ms. We find that the most stringent bounds come from Cassini measurements of the Shapiro time delay in the Solar System that yield a lower bound ?BD>40000 for scalar masses ms<2.510-20eV [or Compton wavelengths ?s=h/(msc)>51010km], to 95% confidence. In comparison, observations of the Nordtvedt effect using lunar laser ranging experiments yield ?BD>1000 for ms<2.510-20eV. Observations of the orbital period derivative of the quasicircular white dwarf-neutron star binary PSR J1012+5307 yield ?BD>1250 for ms<10-20eV (?s>1.21011km). A first estimate suggests that bounds comparable to the Shapiro time delay may come from observations of radiation damping in the eccentric white dwarf-neutron star binary PSR J1141-6545, but a quantitative prediction requires the extension of our work to eccentric orbits.
Detection of multipartite entanglement in the vicinity of symmetric Dicke states
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.
Quark-hadron phase transition in Brans-Dicke brane gravity
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.
Dilatonic Brans-Dicke Anisotropic Collapsing Fluid Sphere And de Broglie Quantum Wave Motion
Hossein Ghaffarnejad
2014-12-18
Two dimensional analogue of vacuum sector of the Brans Dicke gravity [1] is studied to obtain dynamics of anisotropic spherical symmetric perfect fluid. Solutions of dynamical field equations are obtained in terms of time and radial coordinates. In static regime the obtained solutions leads to a dark matter fluid with state equation $\\gamma=\\frac{p(\\rho)}{\\varrho}=-0.25.$ For non-static regime the fluid can be treat as a regular matter with positive barotropic index $\\gamma>0.$ Evaluation of total mass of the fluid leads to choose particular values on the Brans Dick parameter as $\\omega>\\frac{2}{3};\\omegafluid are obtained in its static regime. In case $\\omega>0$ the apparent horizon is covered by event horizon and hence the cosmic censorship hypothesis is still maintained as valid. \\\\ In second part of the paper we obtain de Broglie pilot wave of our fluid model. It can be describe particles ensemble which are distinguished from each other by $\\omega.$ Incident current density of particles ensemble is evaluated on the event and apparent horizon describing the `Hawking radiation` in statistical mechanics perspective. The quantum potential is calculated on the event horizon which is independent from $\\omega$ but the evaluated quantum potential on the apparent horizon is depended to particular value of $\\omega$.
Economics and feasibility of co-composting solid waste in McHenry County. Final report
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.
Ulloa, Sergio E.
a kind of collective behavior analogous to the Dicke effect in optics. The latter manifests itself usually the random potential comes from charged donors with energy levels substantially higher than that the mobility dropped by two orders of magnitude when the thickness of the tunneling barrier between the dots
Jean Paul Mbelek
2013-04-30
We provide proofs of some assumptions recently made by F. O. Minotti to conclude on the possibility that an additional scalar field minimally coupled to gravity may help to reconcile a Brans-Dicke coupling constant $\\omega$ of the order unity with solar system bounds.
K. Satake; M. Nishikawa; K. Shibata
1987-01-01
The concentrations of fifteen elements (B, Na, Mg, Al, P, K, Ca, Ti, Mn, Fe, Cu, Zn, Sr, Cd, Pb) in thalli of the sub-aquatic liverwort Pellia endiviifolia (Dicks.) Dum. collected from seven sites in Japan, were analyzed by inductively coupled plasma atomic emission spectrometer (ICP). The average concentration of major essential elements in the thalli was: 49 600 g
Large-N scaling behavior of the ground-state energy and fidelity in the Dicke Model
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 $\
Three-dimensional pin-to-pin analyses of VVER-440 cores by the MOBY-DICK code
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.
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
A Highly Robust P2P-CDN Under Large-Scale and Dynamic Participation Manal El Dick, Esther Pacitti
Paris-Sud XI, Universit de
A Highly Robust P2P-CDN Under Large-Scale and Dynamic Participation Manal El Dick, Esther Pacitti--By building a P2P Content Distribution Network (CDN), peers collaborate to distribute the content of underpro challenging, given the highly dynamic and autonomous participation of peers. Indeed, the P2P-CDN should adapt
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.
Variation of the gravitational constant, G, and the age of the sun in the Brans-Dicke cosmology
A. D. Pinotsis
1984-01-01
The present position of the sun in the H-R diagram is compared with isochrones of three and five billion years, and with M = 1 solar mass models in order to derive a value for the rate of decrease in the gravitational constant G over time according to the Brans-Dicke (1961) cosmological theory with omega = 2. Through a series
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
Resonances of the confined hydrogen atom and the Lamb-Dicke effect in non-relativistic qed
Paris-Sud XI, Université de
· P/M is due to the Doppler effect. Suppose finally that the center of mass of the atom is confined effect nor broadened by Doppler effect. The suppression of both the recoil shift and the Doppler effectResonances of the confined hydrogen atom and the Lamb-Dicke effect in non-relativistic qed J
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.
Gravitational collapse in Husain space-time for Brans-Dicke gravity theory with power-law potential
NASA Astrophysics Data System (ADS)
Rudra, Prabir; Biswas, Ritabrata; Debnath, Ujjal
2014-12-01
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, ?, 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/inhomogeneous 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 ? (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 ?" leads to the possibility of getting more naked singularities even for a non-accelerating universe.
Gravitational Collapse In Husain Space-time For Brans-Dicke Gravity Theory with Power-law Potential
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.
The Inertia of Sex: Henry Adams on Family and the Politics of Unconditional Love
Brian Duff
2010-01-01
This article offers a reassessment of the contemporary relevance of the political thought of Henry Adams through a focus on his ideas about the relationship between family and politics. Adams ideas have been dismissed by contemporary thinkers, like Richard Rorty, who rely on similar ideas about the role family should play in politics. The article traces the role of ideas
Henry H. Wheeler Jr. Brain Imaging Center Research Day 2012 Highlights
Walker, Matthew P.
of the human brain for the Human Connectome Project" David Feinberg (BIC) 2:25 "Magnetic Resonance ImagingHenry H. Wheeler Jr. Brain Imaging Center Research Day 2012 Highlights Thursday, January 17, 2013'Esposito lab) 10.20 "Simultaneous TMS and fMRI" Miguel Perez (BIC) 10:45 "Aging, brain atrophy, and sleep
In 1775 Patrick Henry wrote, "I know no way of judging the
of concentration: ancient and Medieval, modern European, American and public history. Other courses are available in such areas as urban history, military history, women's history, legal history, family history, Kansas historyHISTORY In 1775 Patrick Henry wrote, "I know no way of judging the future but by the past
In 1775 Patrick Henry wrote, "I know no way of judging the
of concentration: ancient and Medieval, modern European, American and public history. Other courses are available in such areas as urban history, military history, world history, women's history, legal history, family historyHISTORY In 1775 Patrick Henry wrote, "I know no way of judging the future but by the past
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.
Did schizophrenia change the course of English history? The mental illness of Henry VI
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
Blay, Gonzalo; Hernndez-Olmos, Vctor; Pedro, Jos R
2011-03-21
The enantioselective Henry reaction between alkyl- and arylglyoxal hydrates and nitromethane catalyzed by Cu(II)-iminopyridine complexes takes place regioselectively on the ketone carbonyl group to give chiral tertiary nitroaldols with high functional group density and enantiomeric excesses of up to 96?%. Both aromatic and aliphatic glyoxals are suitable substrates for this reaction. PMID:21344519
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,
The Science of Science: A Physicist Reads Barnes, Bloor and Henry.
ERIC Educational Resources Information Center
Mermin, N. David
1998-01-01
In their book entitled Scientific Knowledge, Barry Barnes, David Bloor, and John Henry repudiate the notion that physical environment plays no role in the creation of scientific knowledge, thereby removing a major bone of contention between scientists and practitioners of the sociology of scientific knowledge. A physicist discusses ways in which
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
The Very Air We Breathe: The Aesthetics of Experience in Henry James's From Chambry to Milan
Steven Salmoni
2008-01-01
This study offers a reading of Henry James's 1869 travel essay From Chambry to Milan, and argues that James's text uses the occasion of travel to Italy to pose a variety of phenomenological, epistemological and aesthetic questions. Such reflections become especially concentrated when James visits the home of Jean-Jacques Rousseau in Chambry and senses the ghostly' remainder of its former
Henry Herbert Goddard and the Politics of Mental Measurement (1910-1920).
ERIC Educational Resources Information Center
Gonzalves, Linda
The history of the study of human mental ability is an example of the dialectic in social science between those who interpret data within the framework of existing social inequities and those who look for perspectives that might eventually dissolve inequities. The dedication of Henry Herbert Goddard to a belief in the scientific proof of
Stratigraphic revision of Campanian (Upper Cretaceous) rocks in the Henry Basin, Utah
1990-01-01
Upper Cretaceous strata in the Henry Basin of south-central Utah include a 1,575 ft thick sequence of marginal marine and continental rocks of Campanian age. Stratigraphic study of this sequence indicates the need for changes in nomenclature and boundary definitions. Paleontologic study of the same sequence provides a basis for improved interpretations of depositional environments and age. The Mancos Shale
factorization (PMF) analysis of aerosol mass spectrometer (AMS) data. Ammonium sulfate (AS) and internally mixed ammonium sulfate/fulvic acid (AS/FA) seed aerosols both show an exponential increase of effective Henry Sulfate Christopher J. Kampf, Eleanor M. Waxman,, Jay G. Slowik,§ Josef Dommen,§ Lisa Pfaffenberger
Image, Power and Landscape: An Examination of the Hampton Court Palace Gardens of Henry VIII
Laurie Ellen Pazzano
2011-01-01
Following England's break from the Roman Catholic Church in the early 1530s, Henry VIII became the political and spiritual leader of a new empire, England, as his understanding of God and his divinely appointed role as monarch underwent rebirth. Engaged in nationwide reformation of the English Church alongside a sacred re-imaging of his royal image, a dramatic reinterpretation of the
The Earliest Bronze Age in Southwest Asia (3100-2700 BC) ... Henry Wright
White, Douglas R.
The Earliest Bronze Age in Southwest Asia (3100-2700 BC) ... Henry Wright I.Introduction: 5000 the Late Bronze Age during the later second millennium BC and termed this the time of the "real First years ago in the Middle East A."The First Internationalism" or the "First Dark Age"? Half a century ago