Henri Poincar Henri Poincare University Nancy 1
Boyer, Edmond
Université Henri Poincaré Henri Poincar´e University Nancy 1 Security Framework for Decentralized the Research Master of Henri Poincar´e University Nancy 1 (Computer Science: Services, Security and Networks) by Jagdish Prasad Achara Composition of jury Didier Galmiche Professor at Henri Poincar´e University Nancy
ERIC Educational Resources Information Center
Judson, Bay
1984-01-01
The life of the sculptor Henry Moore is briefly discussed and characteristics of his sculpture are described. Also included are lists of recommended films and books dealing with Moore, a student's guide to looking at sculpture, and sculpture activities for secondary students. (RM)
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
ERIC Educational Resources Information Center
Rosenberg, Robert M.; Peticolas, Warner L.
2004-01-01
A retrospective view of Henry's law and its applicability in any specific system at a finite concentration is tested. It can be concluded that Henry's law is only a limiting law and is adequate at low mole fractions but is useful for practical purposes where high precision is not required.
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.
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.
David Wenjie Tian; Ivan Booth
2015-07-27
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}[\\phi(R+\\frac{a}{\\sqrt{-g}}{}^*RR + b\\mathcal{G})-\\frac{\\omega_{\\text L}}{\\phi}\
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}\
Richard (Dick) R. Bootzin (1940-2014).
Cousins, Jennifer
2015-09-01
Richard (Dick) R. Bootzin, a world-renowned leader in sleep and sleep disorders, passed away suddenly in his home in Tucson, Arizona, on the night of December 4, 2014. He was 74 years old. Dick was born on February 25, 1940. Dick is survived by his wife Maris (Mitzi) and two daughters, Deborah and Lainey. Dick's footprint in the field of psychology and in sleep and sleep disorders, in particular, will not be filled any time soon. He was an exceptional researcher, collaborator, and mentor. Dick may be most well-known for his work on the treatment of insomnia. One of the most profound ways that Dick will be remembered is by his students and mentees. His mentorship was unsurpassed. All who knew Dick as a colleague, mentor, friend, or family will miss him dearly. (PsycINFO Database Record PMID:26348342
NASA Astrophysics Data System (ADS)
Brans, Carl H.
2014-03-01
This is primarily an historical survey of the origins and evolution of only one of a variety of many scalar-tensor (ST) alternatives to the standard Einstein equations of General Relativity. This review will only address itself to what has become known as the Brans-Dicke, or more properly Jordan-Brans-Dicke, theory based on the 1961 publications of Brans and Dicke. These papers substantially duplicate much of the work of Jordan and his group. However, for several reasons, including the stature of Dicke, this theoretical work from the 1960's was seminal in triggering an explosion of interest, both theoretical and experimental, into Einstein's theory and its alternatives. Until that time the early corroboration of Einstein's equations seemed to preclude interest in investigation of alternatives. From the 1960's on however, ST theories provided a remarkable impetus for renewed exploration into gravitational physics. Perhaps this has been their most significant contribution to the field of space-time physics, now especially in cosmology.
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
Chen, Xinzhong
express my deep admiration for the testimony that you're about to offer. 7 INT. STATE SENATE MEETING ROOM, DAY 4 NARRATOR #2 This is Julie. She is eleven years younger than her sister. Henry tends to coddle a year-long contract with OUTOCAR. She's going to be living with her sister while working at her first
Cosmic Acceleration in Brans-Dicke Cosmology
Yousef Bisabr
2011-10-15
We consider Brans-Dicke theory with a self-interacting potential in Einstein conformal frame. We show that an accelerating expansion is possible in a spatially flat universe for large values of the Brans-Dicke parameter consistent with local gravity experiments.
NSDL National Science Digital Library
Henry M. Jackson served for over three decades in the U.S. Senate. First elected in 1941, Jackson was a strong supporter of the defense industries located in Washington and also found time to run for President in 1972 and 1976. Recently, the University of Washington Digital Collections program created the Henry M. Jackson digital collection for the use of scholars and anyone with an interest in political and state history. First-time visitors should read the essay about Jackson titled "A Legacy of Public Service" and then begin looking over the nice archive of photos. The photos are contained within fifteen different sections, such as "Atomic Energy and Hanford", "In Washington State", and "With the Kennedys".
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.
Allen, Richard E
2006-01-01
"Can we do anything for you?" The question was embarrassing. Henry had been poked and prodded and preserved far beyond his wishes. In a medical system that scorns comfort care, a resident physician is troubled by the case of an elderly man with poor quality of life. An awkward attempt at a Boy Scout service project emphasizes how poorly we comfort the terminally ill despite modern technology and interventionalism. PMID:16449401
Allen, Richard E.
2006-01-01
Can we do anything for you? The question was embarrassing. Henry had been poked and prodded and preserved far beyond his wishes. In a medical system that scorns comfort care, a resident physician is troubled by the case of an elderly man with poor quality of life. An awkward attempt at a Boy Scout service project emphasizes how poorly we comfort the terminally ill despite modern technology and interventionalism. PMID:16449401
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 to the tenets of his own faith. These educated, energetic churchmen included James Sim, Baptist; Benjamin Eby was Elder William Henry of the Christian Church, who first ministered to members of his faith from his base
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.
Cosmic Acceleration and Brans-Dicke Theory
M. Sharif; Saira Waheed
2013-03-08
This paper is devoted to study the accelerated expansion of the universe by exploring the Brans-Dicke parameter in different eras. For this purpose, we take FRW universe model with viscous fluid (without potential) and Bianchi type I universe model with barotropic fluid (with and without potential). We evaluate deceleration parameter as well as Brans-Dicke parameter to explore cosmic acceleration. It is concluded that accelerated expansion of the universe can also be achieved for higher values of the Brans-Dicke parameter in some cases.
Obituary: Henry Emil Kandrup, 1955-2003
David Merritt; Stephen T. Gottesman
2004-01-01
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
Morange, M
2005-12-14
The importance given to biological complexity and dynamics, the progressive giving up the notion of genetic programme, the attention paid to noise at the molecular level, are all new aspects of biological research characteristic of the post-genomic era. They are frequently mentioned as the signs of the delayed recognition of the important contributions made by Henri Atlan from the beginning of the 1970s. By focusing my study on his first major essay, l'Organisation Biologique et la Thorie de l'Information, I reach a somewhat different conclusion. Whereas Henri Atlan proposed an early criticism of the notion of genetic programme, the point of view he adopted was at odds with molecular biology. His attempt to apply the theory of information to organisms was a project already abandoned in the United States. The importance he placed to the second law of thermodynamics and his insistence on the limits of the Darwinian theory of evolution were more the sign of an attachment to past traditions of biological thought, still permeating the French community of biologists in the second half of the XXth century, than an anticipation of future developments in the post-genomic era. PMID:16359613
Fermions in Brans-Dicke cosmology
L. L. Samojeden; F. P. Devecchi; G. M. Kremer
2010-01-15
Using the Brans-Dicke theory of gravitation we put under investigation a hypothetical universe filled with a fermionic field (with a self interaction potential) and a matter constituent ruled by a barotropic equation of state. It is shown that the fermionic field (in combination with the Brans-Dicke scalar field) could be responsible for a final accelerated era, after an initial matter dominated period.
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.
NSDL National Science Digital Library
While many writers have to wait decades, if not centuries, after their death to receive critical or commercial success, Henry Wadsworth Longfellow was lucky to achieve both during his lifetime. Born in Portland, Maine in 1807, he was a figure of national prominence by the 1850s, and a much-beloved professor at Harvard. Recently, the Maine Historical Society created this fine tribute to the man and his work. The site is divided into seven primary sections which include an extended biographical essay about his life and work, information about his family and his homes in Portland and Cambridge. Of course, any site about Longfellow would be incomplete without a generous selection of his poems, and this site has that particular detail well covered. In the Longfellow poems database, visitors can view a sortable list of his works, which can be arranged by poem title, first line, and publication date.
Waldron, Tony
2014-01-01
Henry Moon qualified in London in medicine and dentistry, emigrated to New Zealand, eventually returning to London. He is known for his observations of the malformation of tooth cusps in children with congenital syphilis. PMID:24620436
Thin-shell wormholes in Brans-Dicke gravity
Ernesto F. Eiroa; Martin G. Richarte; Claudio Simeone
2009-03-12
Spherically symmetric thin-shell wormholes are constructed within the framework of Brans-Dicke gravity. It is shown that, for appropriate values of the Brans-Dicke constant, these wormholes can be supported by matter satisfying the energy conditions.
DIES ACADEMICUS Interventions Universit de Genve Dick Marty
Halazonetis, Thanos
DIES ACADEMICUS Interventions Universit de Genve Dick Marty Le 14 octobre 2011 Seul le texte prononc fait foi 1 DIES ACADEMICUS Universit de Genve Le 14 octobre 2011 Intervention de Dick Marty La Genve Dick Marty Le 14 octobre 2011 Seul le texte prononc fait foi 2 diffrents qui peuvent saisir
The Ore conditions and the lamplighter group (after Warren Dicks)
Schick, Thomas
The Ore conditions and the lamplighter group (after Warren Dicks) Thomas Schick Last compiled gives slightly more general results. This proof is due to Warren Dicks. We feel that it should condition and the lamplighter group (after Warren Dicks) 3 the latter for l > 0. Using the fact that xl ax
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.
Reprint Page # 1 REV. THOMAS HENRY
sons - Thomas, not known, James, William 3 daughters - Names unknown. In 1811 the family set sail their brother's (James) funeral near Guelph. William was still alive in 1880, and at that time was the only sur by Richard Conn Henry (son of Edwin Mackie Henry, grandson of Edwin Mowat Henry, great grandson of James
1982 Bowie Medalist: Henry Stommel
NASA Astrophysics Data System (ADS)
Munk, Walter H.
When Curt Collins asked me to present the citation for the award of the 1982 Bowie Medal, my immediate response was: can he deliver the medalist? Henry Stommel is not known for his attendance at large meetings, nor can I believe that the acceptance of public honors is one of his favorite pastimes.My job is made easier by the recent volume Scientific Surveys in Honor of Henry Stommel put together by Bruce Warren and Carl Wunsch. Arons has summarized Hank's scientific work, and there are personal notes by Montgomery, Deacon, and Fuglister that I have greatly enjoyed.
ERIC Educational Resources Information Center
Carrier, David
2004-01-01
Because beauty has for a long time now been politically incorrect (at least among certain influential critics and academic historians) the art of Henri Matisse has recently suffered from a kind of benign neglect. His goals were luxury, calm, and voluptuousness, not social critique. Liberated from any vital connection with everyday life, they often
Neurology Research Henry Ford Hospital
Finley Jr., Russell L.
Neurology Research Henry Ford Hospital presented by Zhenggang Zhang, MD. Ph.D. Senior Scientist, Department of Neurology #12;Neurology Research Directed by Michael Chopp Ph.D NIH grants: 1 PO1 and 10 RO1 of neurological outcome in these patients. #12;Restorative Therapies for Stroke #12;Model of Middle Cerebral
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
Darby's Dream Richard Conn Henry
Darby's Dream Richard Conn Henry Department of Physics and Astronomy, The Johns Hopkins University,000 have left any descendants at all. It seems that "our tribe" had enormous successive victories over all change, that occurred only in our tribe, led to the development of that first language. Imagine that you
Understanding Human Experience Henry Kautz
Kautz, Henry
Understanding Human Experience Henry Kautz One of the earliest goals of research in artificial intelligence was to create systems that can interpret and understand day to day human experience. Early work on the goal of building systems that understand human experience. Each of the previous barriers is weakened
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
Curriculum Vitae Henry R. Glyde
Glyde, Henry R.
of Physics 1980 1963 NATO-NRC Special Scholarship 1960 Rhodes Scholar 3 #12;RECENT HIGHLIGHTS: 2012Curriculum Vitae Henry R. Glyde Department of Physics and Astronomy University of Delaware Newark of Physics and Astronomy, University of Delaware, Newark, DE 19716 Phone: (302) 831-8051, Fax: (302) 831
Universal gates for transforming multipartite entangled Dicke states
Toshiki Kobayashi; Rikizo Ikuta; Sahin Kaya Ozdemir; Mark Tame; Takashi Yamamoto; Masato Koashi; Nobuyuki Imoto
2014-02-05
We determine the minimal number of qubits that it is necessary to have access to in order to transform Dicke states into other Dicke states. In general, the number of qubits in Dicke states cannot be increased via transformation gates by accessing only a single qubit, in direct contrast to other multipartite entangled states such as GHZ, W and cluster states. We construct a universal optimal gate which adds spin-up qubits or spin-down qubits to any Dicke state by minimal access. We also show the existence of a universal gate which transforms any size of Dicke state as long as it has access to at least the required number of qubits. Our results have important consequences for the generation of Dicke states in physical systems such as ion traps, all-optical setups and cavity-QED settings where they can be used for a variety of quantum information processing tasks.
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.
The progressive solutions for the Dicke Hamiltonian
NASA Astrophysics Data System (ADS)
Bao, Lina; Pan, Feng; Li, Xiaotong; Liang, Xiao; Draayer, J. P.
2015-07-01
A progressive diagonalization scheme for the Dicke Hamiltonian, which describes the interaction of N two-level atoms with a single-mode radiation field via a dipole interaction, is proposed. It is shown that the ground state of the Dicke Hamiltonian with a finite number of atoms can be solved almost exactly by using a progressive diagonalization scheme that involves a one-variable equation at each step. The scheme is efficient for the lower part of the spectrum. Calculated results for ground-state energies, photon numbers, atomic inversions, fluctuations in the latter two quantities, entanglement measures, and Shanon information entropies at resonance points for some finite j cases as functions of the coupling parameter are given. These outcomes show significant changes in the photon number, atomic inversion, and their fluctuations near the critical point where the entanglement measure reaches its maximum value.
Quantum tunneling in the adiabatic Dicke model
Chen Gang; Chen Zidong; Liang Jiuqing
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.
D. S. Goldwirth; H. W. Zaglauer
1993-01-01
Using the thin-wall approximation the authors develop a scheme to describe the evolution of true vacuum bubbles in Jordan-Brans-Dicke theory. They find four possible configurations depending on the surface energy density. The type of bubbles and the time of nucleation determines whether the bubbles recollapse or grow and ultimately expand with the speed of light, which in turn depends on
Axially Symmetric Brans-Dicke-Maxwell Solutions
NASA Astrophysics Data System (ADS)
Chatterjee, S.
1981-05-01
Following a method of John and Goswami new solutions of coupled Brans-Dicke-Maxwell theory are generated from Zipoy's solutions in oblate and prolate spheroidal coordinates for source-free gravitational field. All these solutions become Euclidean at infinity. The asymptotic behavior and the singularity of the solutions are discussed and a comparative study made with the corresponding Einstein-Maxwell solutions. The possibility of a very large red shift from the boundary of the spheroids is also discussed.
Spontaneous Leptogenesis in Brans-Dicke Cosmology
Chi-Yi Chen; You-Gen Shen; Bo Feng
2005-08-04
The role of the auxiliary scalar field $\\phi$ of Brans-Dicke theory played in baryon number asymmetry is discussed in this paper. We consider a derivative coupling of this gravitational scalar field to the baryon current ${J^{\\mu}}_B$ or the current of the baryon number minus lepton number ${J^{\\mu}}_{B-L}$ based on a series of works of R. Morganstern about the Brans-Dicke cosmology. We find that the spontaneous baryogenesis by this coupling is capable to yield a sufficient baryon asymmetry $n_B/s\\sim 10^{10} $ for the time of the grand unification is in a little advanced. In addition, Davoudiasl et al have recently introduced a new type of interaction between the Ricci scalar $R$ and the bayon current $J^{\\mu}$, $\\partial_{\\mu}R J^{\\mu}$ and also proposed a mechanism for baryogenesis, the gravitational baryogenesis. However, the Einstein equation tell us that $\\dot{R}=0$ in the radiation-dominated epoch of the standard FRW cosmology. In this paper we reconsider the feasibility of having gravitational baryongenesis with such a form of interaction in radiation-filled Brans-Dicke cosmology. We will show that $\\dot{R}$ does not vanish in this case and the required baryon number asymmetry can also be achieved.
Henry Morgenthau's voice in history.
Steiner, Pamela
2015-01-01
Henry Morgenthau (1856-1946) distinguished himself as the U.S. Ambassador to the Ottoman Empire, 1913-1916, and as the chairman of the League of Nations Refugee Settlement Commission (RSC) for Greece, 1923-24. I describe aspects of his early life that shaped the man he became, his accomplishments in these two posts, and his feelings about himself over time. At the end I briefly describe his attitude toward a possible Jewish state in Palestine. PMID:25630196
Sung, Ji Hea; Ahn, Sang Jung; Kim, Na Young; Jeong, Soo-Kyoung; Kim, Joong Kyun; Chung, Joon Ki; Lee, Hyung Ho
2010-10-01
An extracellular gelatinolytic enzyme obtained from the newly isolated Bacillus subtilis JB1, a thermophilic microorganism relevant to the aerobic biodegradation process of fish-meal production, was purified via ammonium sulfate precipitation, Sephadex G-200 Gel filtration chromatography, and one-dimensional gel electrophoresis separation and subsequently identified via peptide mass fingerprinting and chemically assisted fragmentation matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. The subtilisin JB1 gene was sequenced and its recombinant protein prosubtilisin JB1 was expressed in Escherichia coli, and the purified prosubtilisin JB1 (62 kDa) protein was digested with gelatin, bovine serum albumin, azocasein, fibrinogen, and the fluorogenic peptide substrate Ala-Ala-Phe-7-amido-4-methylcoumarin hydrochloride, whereas the serine protease inhibitors phenylmethylsulfonyl fluoride and chymostatin completely inhibited its enzyme activity at an optimal pH of 7.5. Thus, our results show that subtilisin JB1 may serve as a potential source material for use in industrial applications of proteolytic enzymes and microorganisms for fishery waste degradation and fish by-product processing. PMID:19902383
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.
Brans-Dicke scalar field as a chameleon
Das, Sudipta; Banerjee, Narayan
2008-08-15
In this paper it is shown that in Brans-Dicke theory, if one considers a nonminimal 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}.
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 $\\omega$.
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.
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
Supporting the Dick Vet The Royal (Dick) School ofVeterinary Studies was
Edinburgh, University of
difficult cases to our specialists.These include heart and lung problems, skin complaints, and pet cancer people and their pets.The inspiration for our Garden came from Caroline Freedman, client, friend everyone who has already supported the DickVet by remembering their beloved pets in this way. #12;
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.
One Too Many 2006 Richard Conn Henry
One Too Many 2006 Richard Conn Henry Richard Conn Henry There was no way that the boy could know itbut it was happening all over Europe. The boy only knew that the ice above the village had retreated warmth, and the boy was happy. His pebbles rattled in his pocket, just as his cows sometimes rattled
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
Henry's law constants of polyols
NASA Astrophysics Data System (ADS)
Compernolle, S.; Mller, J.-F.
2014-05-01
Henry's law constants (HLC) are derived for several polyols bearing between 2 and 6 hydroxyl groups, based on literature data for water activity, vapour pressure and/or solubility. Depending on the case, infinite dilution activity coefficients (IDACs), solid state pressures or activity coefficient ratios are obtained as intermediary results. For most compounds, these are the first values reported, while others compare favourably with literature data in most cases. Using these values and those from a previous work (Compernolle and Mller, 2014), an assessment is made on the partitioning of polyols, diacids and hydroxy acids to droplet and aqueous aerosol.
Layered Yardangs in Henry Crater
NASA Technical Reports Server (NTRS)
2003-01-01
MGS MOC Release No. MOC2-389, 12 June 2003
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows wind-sculpted remnants of layered sedimentary rock that once completely covered the northwestern floor of Henry Crater, an ancient impact basin located at 11.7oN, 336.4oW. These landforms, shaped somewhat like inverted boat hulls, are 'textbook examples' of a wind erosion form known as a yardang. The image covers an area 2.3 km (1.4 mi) wide; sunlight illuminates the scene from the left.
Solar oblateness from Archimedes to Dicke
NASA Astrophysics Data System (ADS)
Sigismondi, C.; Oliva, P.
2005-10-01
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 the solar diameter is presented. Archimedes was the first to give upper and lower values for the solar diameter in the third century before Christ. Then there followed the method of total eclipses, used after Halley's observative campaign of 1715 eclipse. We will also discuss the variant of partial eclipses, useful to measure different chords of the solar disk and the method of Dicke, which correlates oblateness with luminous excess in the equatorial zone.
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.
Generation of Dicke states using adiabatic passage
Toyoda, K.; Watanabe, T.; Kimura, T.; Nomura, S.; Haze, S.; Urabe, S. [Graduate School of Engineering Science, Osaka University, 1-3 Machikaneyama, Toyonaka, Osaka (Japan)
2011-02-15
Entangled states of two ions are realized by using an adiabatic process. Based on the proposal by Linington and Vitanov [Phys. Rev. A 77, 010302 (2008)], we have generated Dicke states in optical qubits of two {sup 40}Ca{sup +} 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.
Mass transportation with LQ cost functions J.-B. Pomet
Rifford, Ludovic
Mass transportation with LQ cost functions A. Hindawi J.-B. Pomet L. Rifford Abstract We study the optimal transport problem in the Euclidean space where the cost function is given by the value function Brenier's Theorem prov- ing existence and uniqueness of an optimal transport map. In the controllable case
On the Chameleon Brans-Dicke Cosmology
Yousef Bisabr
2012-12-13
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. We assume a power law form for the potential and the coupling functions as the inputs of the model and show that acceleration of the universe can be realized for a constrained range of exponent of the potential function. We also argue that this accelerating phase is consistent with a large and positive Brans-Dicke parameter. In our analysis, the potential plays a more important role with respect to the coupling function in dynamics of the universe as the latter does not contribute to any of the relations characterizing evolution of scale factor of the universe and the scalar field. However, we will show that the coupling function is closely related to magnitude and direction of the energy transfer between matter and the scale field. We use this fact and some thermodynamic aspects of the model to put some constraints on the coupling function. In particular, we argue that the second law of thermodynamics constrains direction of the overall energy transfer.
Radiation Dominated Universe for Jordan-Brans-Dicke Cosmology
M. Arik; L. Amon Susam
2011-11-17
Jordan-Brans-Dicke cosmology with a standard kinetic term for the scalar field and no mass term has the same radiation dominated solution as standard Einstein cosmology without the cosmological constant. Because of this, the primordial nucleosynthesis (Big - Bang nucleosynthesis) result obtained for standard cosmology remains the same for Jordan-Brans-Dicke cosmology. We show that Jordan-Brans-Dicke cosmology with a mass term for the scalar field as well as explaining dark energy for the present era, can also explain radiation dominated cosmology for the primordial nucleosynthesis era.
False vacuum decay in Jordan-Brans-Dicke cosmologies
Holman, R.; Wang, Yun (Carnegie-Mellon Univ., Pittsburgh, PA (USA). Dept. of Physics); Kolb, E.W.; Vadas, S.L. (Fermi National Accelerator Lab., Batavia, IL (USA) Chicago Univ., IL (USA)); Weinberg, E.J. (Columbia Univ., New York, NY (USA). Dept. of Physics)
1989-12-01
We examine the bubble nucleation rate in a first-order phase transition taking place in a background Jordan-Brans-Dicke cosmology. We compute the leading order terms in the nucleation rate when the Jordan-Brans-Dicke field is large (i.e., late times) by means of a Weyl rescaling of the fields in the theory. We find that despite the fact that the Jordan-Brans-Dicke field (hence the effective gravitational constant) has a time dependence in the false vacuum, at late times the nucleation rate is time independent. 21 refs.
Henry's law constants of polyols
NASA Astrophysics Data System (ADS)
Compernolle, S.; Mller, J.-F.
2014-12-01
Henry's law constants (HLC) are derived for several polyols bearing between 2 and 6 hydroxyl groups, based on literature data for water activity, vapour pressure and/or solubility. While deriving HLC and depending on the case, also infinite dilution activity coefficients (IDACs), solid state vapour pressures or activity coefficient ratios are obtained as intermediate results. An error analysis on the intermediate quantities and the obtained HLC is included. For most compounds, these are the first values reported, while others compare favourably with literature data in most cases. Using these values and those from a previous work (Compernolle and Mller, 2014), an assessment is made on the partitioning of polyols, diacids and hydroxy acids to droplet and aqueous aerosol.
Cylindrically Symmetric-Static Brans-Dicke-Maxwell Solutions
Ahmet Baykal; Ozgur Delice
2005-12-23
We present static cylindrically symmetric electrovac solutions in the framework of the Brans-Dicke theory and show that our solution yields some of the well-known solutions for special values of the parameters of the resulting metric functions.
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
Spectra of Relic Gravitons and Brans-Dicke Theory
B. K. Sahoo
2004-06-11
The spectra of relic gravitational waves produced as a result of cosmological expansion of the inflationary models are derived in Brans-Dicke theory of gravity.The time dependence of the very early Hubble parameter and matter energy density are derived from frequency dependent spectrum of relic gravitational waves.Also it is found that Brans-Dicke scalar field contributes to the energy density of relic gravitons.
Probing the Brans-Dicke Gravitational Field by Cerenkov Radiation
G. Lambiase
2001-10-25
The possibility that a charged particle propagating in a gravitational field described by Brans-Dicke theory of gravity could emit Cerenkov radiation is explored. This process is kinematically allowed depending on parameters occurring in the theory. The Cerenkov effect disappears as the BD parameter omega tends to inftinity, i.e. in the limit in which the Einstein theory is recovered, giving a signature to probe the validity of the Brans-Dicke theory.
The strange case of Sir Henry Gray.
Adam, A; Hutchison, J D; Scotland, T R
2010-02-01
Sir Henry Williamson Gray was a prominent Aberdeen surgeon who took up the post of Chief of Surgery at the Royal Victoria Hospital, Montreal in 1923. In what subsequently became known as "The Sir Henry Williamson Gray Affair" in the annals of McGill University, his career was ruined and his reputation left in tatters. The authors examine the available evidence and conclude that Gray was treated unfairly. They hope they have helped restore his name and reputation. PMID:20218279
Using solubility and Henry`s law constant data for ketones in water
Yaws, C.L.; Sheth, S.D.; Han, M.
1998-02-01
When a chemical spill occurs in water, the extent of chemical contamination is determined by the chemical`s solubility in the water. If contaminated water comes into contact with air, such as in a pond or a storage vessel, the contaminant`s emissions into the air can be determined based upon Henry`s law constant for that particular constituent. A high Henry`s law constant value translates into a greater emissions level. The engineering design and operation of strippers to remove contaminants from water require data for both water solubility and Henry`s law constant. A new correlation developed by researchers at Lamar University provides reliable values down to very, very low concentrations for the solubility of ketones in water. The correlation is based on the boiling point temperature of the ketone and can be used for engineering studies involving health, safety and environmental considerations. Results for water solubility and Henry`s law constant are provided here for a wide variety of ketones. Representative values are about 249,000 parts per million (ppm) per weight (wt) for methyl ethyl ketone (C{sub 4}H{sub 8}O) and 360 ppm/wt for 5-nonanone (C{sub 9}H{sub 18}O).
Determination of Henrys Law Constants Using Internal Standards with Benchmark Values
It is shown that Henrys 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....
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....
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
Thomas Henry Huxley and neuroscience.
Smith, C U
1999-01-01
In the latter decades of the nineteenth century Thomas Henry Huxley was at the heart of British Science: President of the British Association for the Advancement of Science (1870), President of the Royal Society (1883-86), Chairman of innumerable committees. His thought in many ways characterises the spirit of the 'high' Victorian age in Britain. He was not only the most eminent academic biologist of his time but also deeply interested in philosophical issues. His re-examination of the evolution of the brain in response to Richard Owen's 'telenomic' views formed the kernel of the notorious debate at the 1860 meeting of the British Association in Oxford. From his early youth until old age he thought long and hard about the mind/body problem. This paper follows the development of his ideas and shows how in debate with many of the leading thinkers of his age, in the X-club and the Metaphysical Society, he struggled to develop a biologically-based account of the relationship between mind and brain. However, at the end, he seems to have recognized that his position was not entirely satisfactory and ultimately famously confessing himself 'agnostic' turned from metaphysics to devote himself to more practical issues. The unresolved problems of mind and brain which perplexed Huxley remain to torment his epigoni. PMID:11640239
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.
The missing mass problem and the cosmological constant problem in the Brans-Dicke theory
NASA Astrophysics Data System (ADS)
Ma, Guang-Wen
1993-05-01
The missing mass problem and the cosmological constant problem are reexamined in the framework of the Brans-Dicke theory. It is shown that the Brans-Dicke theory makes it possible to simplify the solution of both problems.
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)
Delocalized single-photon Dicke states and the Leggett-Garg inequality in solid
Nori, Franco
Delocalized single-photon Dicke states and the Leggett-Garg inequality in solid state systems Guang, University of Michigan, Ann Arbor, MI 48109-1040, USA. We show how to realize a single-photon Dicke state. The realization of single-photon Dicke states relies on the cooperative nature of the interaction between a field
Hyperentangled Mixed Phased Dicke States: Optical Design and Detection A. Chiuri,1
Roma "La Sapienza", Universit di
Hyperentangled Mixed Phased Dicke States: Optical Design and Detection A. Chiuri,1 G. Vallone,2,1 N phased Dicke states, has been created by 2-photon hyperentanglement. Our experimental method allows high propose is based on hyperentangled photons [1,2], which allows us to produce symmetric and phased Dicke
New Methods and Structures in the Theory of the MultiMode Dicke Laser Model
New Methods and Structures in the Theory of the MultiMode Dicke Laser Model by Giovanni Alli a, England Abstract We base a treatment of the dissipative, multimode version of Dicke laser model on constructive nonequilibrium statistical mechanics of open systems, Hepp and Lieb 1 (HL) proved that the Dicke
Primordial and asymptotic inflation in Brans-Dicke cosmology
M. Arik; M. C. Calik
2005-12-14
The basic motivation of this work is to attempt to explain the rapid primordial inflation and the observed slow late-time inflation by using the Brans-Dicke theory of gravity. We show that the ratio of these two inflation parameters is proportional to the square root of the Brans-Dicke parameter $% \\omega$ $(\\omega\\gg1) $. We also calculate the Hubble parameter $% H$ and the time variation of the time dependent Newtonian gravitational constant $G$ for both regimes. The variation of the Hubble parameter predicted by Brans-Dicke cosmology is shown to be consistent with recent measurements: The value of $H$ in the late-time future is predicted as 0.86 times the present value of $H$.
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.
Interacting Ghost Dark Energy in Brans-Dicke Theory
Esmaeil Ebrahimi; Ahmad Sheykhi
2011-06-09
We investigate the QCD ghost model of dark energy in the framework of Brans-Dicke cosmology. First, we study the non-interacting ghost dark energy in a flat Brans-Dicke theory. In this case we obtain the EoS and the deceleration parameters and a differential equation governing the evolution of ghost energy density. Interestingly enough, we find that the EoS parameter of the non-interacting ghost dark energy can cross the phantom line ($w_D=-1$) provided the parameters of the model are chosen suitably. Then, we generalize the study to the interacting ghost dark energy in both flat and non-flat Brans-Dicke framework and find out that the transition of $w_D$ to phantom regime can be more easily achieved for than when resort to the Einstein field equations is made.
Ya B Zeldovich's ideas and modern Brans - Dicke cosmology
NASA Astrophysics Data System (ADS)
Novikov, I. D.; Shatskii, A. A.; Alexeyev, S. O.; Tret'yakova, D. A.
2014-04-01
We compare Ya B Zeldovich's ideas about Brans-Dicke theory and Mach's principles, contained in now-classical books, with modern results in this field. Our recent results on the Brans-Dicke cosmology with the cosmological term are presented. The Friedmann-Brans-Dicke equations are written for the flat Universe. The initial conditions for the model are provided by the presently observed Hubble constant, its first time derivative (the deceleration parameter), and matter density. The cosmological scenario with the scale factor not vanishing in the past, corresponding to the absence of the cosmological singularity, is analytically calculated. Instead of the singularity, the scale factor experiences a 'bounce' and demonstrates regular behavior at all times. Some ideas related to Mach's principle are also 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
Experimental realization of Dicke states of up to six qubits for multiparty quantum networking.
Prevedel, R; Cronenberg, G; Tame, M S; Paternostro, M; Walther, P; Kim, M S; Zeilinger, A
2009-07-10
We report the first experimental generation and characterization of a six-photon Dicke state. The produced state shows a fidelity of F=0.56+/-0.02 with respect to an ideal Dicke state and violates a witness detecting genuine six-qubit entanglement by 4 standard deviations. We confirm characteristic Dicke properties of our resource and demonstrate its versatility by projecting out four- and five-photon Dicke states, as well as four-photon Greenberger-Horne-Zeilinger and W states. We also show that Dicke states have interesting applications in multiparty quantum networking protocols such as open-destination teleportation, telecloning, and quantum secret sharing. PMID:19659190
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.
Late time acceleration in 3-brane Brans-Dicke cosmology
A. Errahmani; T. Ouali
2008-03-11
In order to investigate more features of the Brans-Dicke cosmology in the five-dimensional space-time, we explore the solutions of its dynamiacal systems. A behavior of the universe in its early and late time by means of the scale factor is considered. As a results, we show that it is possible to avoid the big rip singularity and to cross the phantom divide line. Furthermore, we review the dark energy component of the universe and its agreement with the observation data for this 3-brane Brans Dicke cosmology by means of the cosmological parameters.
Detecting metrologically useful entanglement in the vicinity of Dicke states
NASA Astrophysics Data System (ADS)
Apellaniz, Iagoba; Lcke, Bernd; Peise, Jan; Klempt, Carsten; Tth, Gza
2015-08-01
We present a method to verify the metrological usefulness of noisy Dicke states of a particle ensemble with only a few collective measurements, without the need for a direct measurement of the sensitivity. Our method determines the usefulness of the state for the usual protocol for estimating the angle of rotation with Dicke states, which is based on the measurement of the second moment of a total spin component. It can also be used to detect entangled states that are useful for quantum metrology. We apply our method to recent experimental results.
Collective lamb shift in single photon Dicke superradiance.
Scully, Marlan O
2009-04-10
The collective Lamb shift and associated radiative decay of a large cloud of radius R containing N atoms uniformly excited by one photon of wavelength lambda is analyzed. It is shown that the time evolution of the symmetric state prepared by single photon absorption in the limit R>lambda is similar to that encountered in the Dicke limit of small sample (R
Inflation and dark energy from the Brans-Dicke theory
NASA Astrophysics Data System (ADS)
Artymowski, Micha?; Lalak, Zygmunt; Lewicki, Marek
2015-06-01
We consider the Brans-Dicke theory motivated by the f(R) = R + ? Rn ? ? R2?n model to obtain a stable minimum of the Einstein frame scalar potential of the Brans-Dicke field. As a result we have obtained an inflationary scalar potential with non-zero value of residual vacuum energy, which may be a source of dark energy. In addition we discuss the probability of quantum tunnelling from the minimum of the potential. Our results can be easily consistent with PLANCK or BICEP2 data for appropriate choices of the value of n and ?.
Excited-state quantum phase transitions in Dicke superradiance models.
Brandes, Tobias
2013-09-01
We derive analytical results for various quantities related to the excited-state quantum phase transitions in a class of Dicke superradiance models in the semiclassical limit. Based on a calculation of a partition sum restricted to Dicke states, we discuss the singular behavior of the derivative of the density of states and find observables such as the mean (atomic) inversion and the boson (photon) number and its fluctuations at arbitrary energies. Criticality depends on energy and a parameter that quantifies the relative weight of rotating versus counterrotating terms, and we find a close analogy to the logarithmic and jump-type nonanalyticities known from the Lipkin-Meshkov-Glick model. PMID:24125239
Dynamics of false vacuum bubbles in Brans-Dicke theory
Bum-Hoon Lee; Wonwoo Lee; Dong-han Yeom
2011-01-11
We study the dynamics of false vacuum bubbles in the Brans-Dicke theory of gravity by using the thin shell or thin wall approximation. We consider a false vacuum bubble that has a different value for the Brans-Dicke field between the inside false vacuum region and the outside true vacuum region. Within a certain limit of field values, the difference of field values makes the effective tension of the shell negative. This allows new expanding false vacuum bubbles to be seen by the outside observer, which are disallowed in Einstein gravity.
Dynamics of false vacuum bubbles in Brans-Dicke theory
Lee, Bum-Hoon; Lee, Wonwoo [Department of Physics and BK21 Division and Center for Quantum Spacetime, Sogang University, Seoul 121-742 (Korea, Republic of); Yeom, Dong-han, E-mail: bhl@sogang.ac.kr, E-mail: warrior@sogang.ac.kr, E-mail: innocent@muon.kaist.ac.kr [Department of Physics, KAIST, Daejeon 305-701 (Korea, Republic of)
2011-01-01
We study the dynamics of false vacuum bubbles in the Brans-Dicke theory of gravity by using the thin shell or thin wall approximation. We consider a false vacuum bubble that has a different value for the Brans-Dicke field between the inside false vacuum region and the outside true vacuum region. Within a certain limit of field values, the difference of field values makes the effective tension of the shell negative. This allows new expanding false vacuum bubbles to be seen by the outside observer, which are disallowed in Einstein gravity.
Quantum phase transition in a pseudo-Hermitian Dicke model
Deguchi, Tetsuo; Ghosh, Pijush K.
2009-08-15
We show that a Dicke-type non-Hermitian Hamiltonian admits entirely real spectra by mapping it to the 'dressed Dicke model' through a similarity transformation. We find a positive-definite metric in the Hilbert space of the non-Hermitian Hamiltonian so that the time evolution is unitary and allows a consistent quantum description. We then show that this non-Hermitian Hamiltonian describing nondissipative quantum processes undergoes quantum phase transition. The exactly solvable limit of the non-Hermitian Hamiltonian has also been discussed.
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 $\\omega$.
$?$ 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}}.
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
Thermodynamics Henri J.F. Jansen
Jansen, Henri J. F.
Thermodynamics Henri J.F. Jansen Department of Physics Oregon State University August 19, 2010 #12;II #12;Contents PART I. Thermodynamics Fundamentals 1 1 Basic Thermodynamics. 3 1.1 Introduction of Thermodynamics. . . . . . . . . . . . . . . . . . 12 1.4 First law: Energy
Unifying SATbased and Graphbased Planning Henry Kautz
Wojna, Arkadiusz
Unifying SATbased and Graphbased Planning Henry Kautz Shannon Laboratory AT&T Labs -- Research man 1992, 1996) with the plan graph approach to STRIPS planning (Blum and Furst 1995). We show outperforms both SATPLAN and Graph plan alone. We also demonstrate that polynomial time SAT simplification
THE HENRY FOUNDATION, INC. FINANCIAL STATEMENTS
Independent Auditor's Report. . . . . . . . . . . . . . . . 1 Statement of Financial Position are the responsibility of the Corporation's management. Our responsibilityis to express an opinion on these financial, the financial position of The Henry Foundation, Inc. as of December 31, 2005, and the changes in its net assets
Susan L. Cutter, Editor JOSEPH HENRY PRESS
: the regionalization of hazards and disasters / edited by Susan L. Cutter. p. cm.--(Natural hazards and disasters) Includes bibliographical references. ISBN 0-309-07443-6 1. Natural disasters--United States. 2. Disasters in the Natural Hazards and Disasters series pub- lished by the Joseph Henry Press, is derived from these two
Java Access to Numerical Libraries Henri Casanova
Dongarra, Jack
computing via Java: NetSolve and f2j. The approaches taken by these two projects are radically di erent. NetJava Access to Numerical Libraries Henri Casanova Jack Dongarra y David M. Doolin May 31, 1997 Abstract It is a common and somewhat erroneous belief that Java will always be too slow" for scienti c
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
REV. THOMAS HENRY CHRISTIAN MINISTER, YORK PIONEER,
real moral uprightness, it is dedicated. That the blessing of the God whom he served may attend it-laden sheaf into the garner of our God ! It is well with Father Henry; and we will bear it in mind as we turn
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
Statespace Planning by Integer Optimization Henry Kautz
Kautz, Henry
Statespace Planning by Integer Optimization Henry Kautz AT&T Shannon Labs 180 Park Avenue Florham of satisfiability testing as a method for solving statespace planning problems (Weld 1999). Kautz and Sel man), automatic generation of axioms from STRIPS operators (Ernst, Millstein, & Weld 1997; Kautz & Selman 1999
JB-UIDS: an interactive UIMS based on OSF/motif
NASA Astrophysics Data System (ADS)
Chen, Min; Sun, Honghui; Dong, Shihai
1996-03-01
This paper presents the principle, functions, features and implementation of a general graphical user interface management system based on OSF/Motif-JB-UIDS, which is a part of the integrated software engineering environment CASE (Computer Aided Software Engineering), named JB (Jade Bird). The visual and interactive UIMS can help the interface designer to generate user interface automatically and then refine it interactively. It adopts a new method of describing internal application interface based on Object-Oriented ideas to support the separation of user interface component from computational component. JB-UIDS has been implemented on SCO-ODT and has good portability and flexibility.
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...
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...
The Heckmann's wormholes in Jordan-Brans-Dicke gravity
S. M. Kozyrev
2010-05-06
A simple Heckmann's vacuum wormhole solution of Jordan-Brans-Dicke gravitation is presented and analysed. It is shown that in contrast with class I Brans solution where the throat radius becomes real when $\\omega < -4/3$ here it becomes positive when $\\omega < -1$.
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 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)
Constraints from CMB in the intermediate Brans-Dicke inflation
Cid, Antonella [Departamento de Fsica, Facultad de Ciencias, Universidad del Bo-Bo, Avenida Collao 1202, Casilla 5-C, Concepcin (Chile); Campo, Sergio del, E-mail: mariaant@udec.cl, E-mail: sdelcamp@ucv.cl [Instituto de Fsica, Pontificia Universidad Catlica de Valparaso, Casilla 4059, Valparaso (Chile)
2011-01-01
We study an intermediate inflationary stage in a Jordan-Brans-Dicke theory. In this scenario we analyze the quantum fluctuations corresponding to adiabatic and isocurvature modes. Our model is compared to that described by using the intermediate model in Einstein general relativity theory. We assess the status of this model in light of the seven-year WMAP data.
Model Refinement from Planar Parallax A. R. Dick R. Cipolla
Drummond, Tom
Model Refinement from Planar Parallax A. R. Dick R. Cipolla Department of Engineering, University to automatically recover general 3D models from a large number of closely spaced images. For instance, [2] uses scenes from relatively few, widely spaced images at less computational expense. However, Facade requires
Some aspects of cylindrical solutions in Brans-Dicke gravity
Andres Arazi; Claudio Simeone
2011-02-17
Several points regarding cylindrical Brans-Dicke geometries are studied. The issue of particle trajectories for the vacuum cylindrical solution is revisited. The possible particular nature of a global string metric is analysed. The general form of the junction conditions for matching cylindrical solutions within this theory is written down, and the relation with the general relativity limit is discussed.
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
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.
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
Henry's law constants for the polychlorinated biphenyls
Burkhard, L.P.; Armstrong, D.E.; Andren, A.W.
1985-07-01
Henry's law constants were predicted from the ratio of the liquid (or subcooled liquid) vapor pressure and aqueous solubility for each polychlorinated biphenyl (PCB) congener. The liquid vapor pressures and aqueous solubilities were derived for each PCB congener by using correlations of Gibbs' free energy of vaporization against gas-liquid chromatographic retention indexes and Gibbs' free energy of solubilization of a liquid against molecular surface area. The predicted values were in fair agreement with experimental values, and the error for these constants was estimated to be a factor of 5 in the temperature range 0.0-40.0 /sup 0/C. For the PCB congeners, Henry's law constants were independent of molecular weight and increased approximately an order of magnitude with a 25.0 /sup 0/C increase in temperature. The average value for Henry's law constants and air-water partition coefficients for the Aroclor PCB mixtures were approximately 4.0 x 10/sup -4/ atm.m/sup 3//mol at 25.0 /sup 0/C.
High energy description of dark energy in an approximate 3-brane Brans-Dicke cosmology
A. Errahmani; T. Ouali
2006-04-20
We consider a Brans-Dicke cosmology in five-dimensional space-time. Neglecting the quadratic and the mixed Brans-Dicke terms in the Einstein equation, we derive a modified wave equation of the Brans-Dicke field. We show that, at high energy limit, the 3-brane Brans-Dicke cosmology could be described as the standard one by changing the equation of state. Finally as an illustration of the purpose, we show that the dark energy component of the universe agrees with the observations data.
Dicke Simulators with Emergent Collective Quantum Computational Abilities
NASA Astrophysics Data System (ADS)
Rotondo, Pietro; Cosentino Lagomarsino, Marco; Viola, Giovanni
2015-04-01
Using an approach inspired from spin glasses, we show that the multimode disordered Dicke model is equivalent to a quantum Hopfield network. We propose variational ground states for the system at zero temperature, which we conjecture to be exact in the thermodynamic limit. These ground states contain the information on the disordered qubit-photon couplings. These results lead to two intriguing physical implications. First, once the qubit-photon couplings can be engineered, it should be possible to build scalable pattern-storing systems whose dynamics is governed by quantum laws. Second, we argue with an example of how such Dicke quantum simulators might be used as a solver of "hard" combinatorial optimization problems.
Dicke simulators with emergent collective quantum computational abilities.
Rotondo, Pietro; Cosentino Lagomarsino, Marco; Viola, Giovanni
2015-04-10
Using an approach inspired from spin glasses, we show that the multimode disordered Dicke model is equivalent to a quantum Hopfield network. We propose variational ground states for the system at zero temperature, which we conjecture to be exact in the thermodynamic limit. These ground states contain the information on the disordered qubit-photon couplings. These results lead to two intriguing physical implications. First, once the qubit-photon couplings can be engineered, it should be possible to build scalable pattern-storing systems whose dynamics is governed by quantum laws. Second, we argue with an example of how such Dicke quantum simulators might be used as a solver of "hard" combinatorial optimization problems. PMID:25910121
Dicke simulators with emergent collective quantum computational abilities
Pietro Rotondo; Marco Cosentino Lagomarsino; Giovanni Viola
2015-01-28
Using an approach inspired from Spin Glasses, we show that the multimode disordered Dicke model is equivalent to a quantum Hopfield network. We propose variational ground states for the system at zero temperature, which we conjecture to be exact in the thermodynamic limit. These ground states contain the information on the disordered qubit-photon couplings. These results lead to two intriguing physical implications. First, once the qubit-photon couplings can be engineered, it should be possible to build scalable pattern-storing systems whose dynamics is governed by quantum laws. Second, we argue with an example how such Dicke quantum simulators might be used as a solver of "hard" combinatorial optimization problems.
Brans-Dicke Theory in Anisotropic Model with Viscous Fluid
Chakraborty, Shuvendu; 10.1134/S0202289311030029
2011-01-01
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
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 cylindrical systems in Brans-Dicke gravity
NASA Astrophysics Data System (ADS)
Sharif, M.; Manzoor, Rubab
2015-09-01
This paper explores structure scalars of cylindrically symmetric spacetime in Brans-Dicke gravity. We construct twelve scalar factors using orthogonal splitting of the Reimann tensor and study their distinct dynamical interpretations. These structure scalars are used to derive a set of governing equations of the evolving system. It is concluded that cylindrical systems are necessarily inhomogeneous. Finally, we show that all possible static inhomogeneous cylindrical solutions can be obtained through structure scalars.
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.
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
Lou Henry Hoover: The Independent Girl. A Curriculum Guide.
ERIC Educational Resources Information Center
Kurtz, Alice K.
This curriculum guide provides ideas for teaching about Lou Henry Hoover, wife of President Herbert Hoover. The book examines personal data, as well as the social milieu of the times of the Hoover's. Teaching suggestions accompany the chapters. There are 12 chapters in the guide: (1) "Timeline, Biographical Sketch, and Photographs of Lou Henry
Correctness of Vehicle Control Systems: A Case Henri B. Weinberg
Lynch, Nancy
of Vehicle Control Systems: A Case Study by Henri B. Weinberg Submitted to the Department of ElectricalCorrectness of Vehicle Control Systems: A Case Study by Henri B. Weinberg B.S., Computer Science Yale University, 1992 Submitted to the Department of Electrical Engineering and Computer Science
Dialogue of Differences: The Writing of Henry Holmes Smith.
ERIC Educational Resources Information Center
Bossen, Howard
In addition to surveying the writings of Henry Holmes Smith, this paper explains his importance as a theoretician and practitioner of photography. After a discussion of Smith's ideas on "reading photographs" and his concerns with the ethics of photography, particularly of photojournalism, the essays in the book, "Henry Holmes Smith: Selected
Cryptanalysis of ABC C^ome Berbain, Henri Gilbert
Bernstein, Daniel
Cryptanalysis of ABC C^ome Berbain, Henri Gilbert France Telecom R&D, 38-40 rue du General Leclerc, F-92794 Issy-les-Moulineaux, France. {come.berbain, henri.gilbert}@francetelecom.com Abstract)32 to GF(2)32 which definition involves key dependent constant 32-bit vectors e and ei, 0 i 31. It works
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.
Henry Kandrup's Ideas About Relaxation of Stellar Systems
David Merritt
2005-02-14
Henry Kandrup wrote prolifically on the problem of relaxation of stellar systems. His picture of relaxation was significantly more refined than the standard description in terms of phase mixing and violent relaxation. In this article, I summarize Henry's work in this and related areas.
Teaching Special Relativity: Minkowski trumps Einstein Richard Conn Henry
Teaching Special Relativity: Minkowski trumps Einstein Richard Conn Henry The Johns Hopkins by Maryland Space Grant Consortium Teaching Special Relativity: Minkowski trumps Einstein Richard Conn Henry badly we teach special relativity encapsulates the practical problem of teaching physics to the freshman
The Rice University Press Initiative: An Interview with Charles Henry
ERIC Educational Resources Information Center
Trevitte, Chad; Henry, Charles
2007-01-01
In this interview Charles Henry, publisher of the Rice University Press (RUP), discusses RUP's rebirth as a fully digital university press. Henry addresses the circumstances that led to this decision, and he further outlines the RUP business model whereby the press will publish its own titles--both digitally and in print-on-demand--while
NASA Technical Reports Server (NTRS)
Smalley, L. L.
1974-01-01
Acharya and Hogan (1973) have introduced a massive scalar field into the usual Brans-Dicke (1961) theory of gravitation. Formally they obtain certain field equations. The assumption of a nonzero divergence for T mu nu (or equivalently the introduction of sources) formally imitates a massive Brans-Dicke and satisfies the condition of Acharya and Hogan that the theory be indistinguishable with the classical test of the Einstein theory. Although it was shown elsewhere that the modified Brans-Dicke theory agrees with the classical test under certain conditions, there were no specified limits on omega, a similar circumstance discovered by Acharya and Hogan for the massive scalar field.
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
Rev. of Henry Miller, by George Wickes
Levine, Stuart
1966-01-01
or Wickes hasnTt asked him, for Henry Miller does not convey a satisfactory chrono logical record of its subject's life. Wickes is thus unable to answer either those questions about which we have legitimate curiosity (What was the proofreading job... Press . 1965. $5.00. Mr. Hoffman's book is a rarity in recent literary criticism: it works both in intent and execution. Limiting his scope to Gertrude Stein's first productive decade (1903-1914), Mr. Hoffman traces the development of the stylistic...
Keldysh approach for non-equilibrium phase transitions in quantum optics: beyond the Dicke model integral approach, that allows us to study physically relevant nonlinearities beyond the idealized Dicke-linear oscillator at finite temperature. For the atoms, we propose a Dicke action that can be solved for any N
ExcellentSwimmers,forJB's60birthday.AntonioDeSimone,SISSA(Trieste,ITALY)1 AntonioDeSimone
Eilbeck, Chris
ExcellentSwimmers,forJB's60birthday.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's60birthday.AntonioDeSimone,SISSA(Trieste,ITALY
The missing mass problem and the cosmological constant problem in the Brans-Dicke theory.
NASA Astrophysics Data System (ADS)
Guangwen, Ma
1993-05-01
The missing mass problem and the cosmological constant problem, which arised in the theory of general relativity, are re-examined in the Brans-Dicke theory. It is shown that the two problems can be solved in simple ways in the Brans-Dicke theory.
Yang, Sun; Misner, Bobbye; Chiu, Rita; Meyskens, Frank L.
2015-01-01
We transformed JB6P+ cells with prolonged intermittent low-dose UVB radiation or prolonged exposure to low-dose H2O2 or CdCl2. Stable transformation was confirmed by an anchorage-independence assay. The JB6P+ transformants formed more colonies (?six folds) in soft agar as compared to their JB6P+ parent cells and were associated with increased intracellular reactive oxygen species (ROS) levels. Activating protein-1 (AP-1) is a family of transcription factors that are rapidly activated by elevated intracellular ROS levels, and their composition is important in the process of cellular transformation and/or tumor progression. To investigate if carcinogenesis induced by distinct carcinogens was via similar molecular mechanisms in these transformants, gel mobility shift and immunoblot analyses were utilized to determine the distinct AP-1 compositions. Compared to parent JB6P+ cells, the gain of JunB and Fra-1 in AP-1 DNA binding complexes was markedly increased in all transformed cells, which might contribute to a more proliferative phenotype, while loss of Fra-2 occurred in JB6P+/H2O2 and JB6P+/Cd cells. Differential AP-1 components in the transformants suggested that their transformations might be mediated by distinct transcription signalings with distinct AP-1 dimer compositions. However, all three transformants exhibited increased activation of pathways involved in cell proliferation (ERK/Fra-1/AP-1 and JNK/c-jun/AP-1) and anti-apoptosis (Bcl-xl). The development of the JB6P+ transformants (JB6P+/UVB; JB6P+/H2O2; JB6P+/Cd) provides a unique tool to study the mechanisms that contribute to different redox-active carcinogens in a single model. PMID:18092320
Solution of the Dicke model for N=3
Daniel Braak
2013-04-09
The N=3 Dicke model couples three qubits to a single radiation mode via dipole interaction and constitutes the simplest quantum-optical system allowing for Greenberger-Horne-Zeilinger states. In contrast to the case N=1 (the Rabi model), it is non-integrable if the counter-rotating terms are included. The spectrum is determined analytically, employing the singularity structure of an associated differential equation. While quasi-exact eigenstates known from the Rabi model do not exist, a novel type of spectral degeneracy becomes possible which is not associated with a symmetry of the system.
Exploring Symmetry Breaking at the Dicke Quantum Phase Transition
Baumann, K.; Mottl, R.; Brennecke, F.; Esslinger, T.
2011-09-30
We study symmetry breaking at the Dicke quantum phase transition by coupling a motional degree of freedom of a Bose-Einstein condensate to the field of an optical cavity. Using an optical heterodyne detection scheme, we observe symmetry breaking in real time and distinguish the two superradiant phases. We explore the process of symmetry breaking in the presence of a small symmetry-breaking field and study its dependence on the rate at which the critical point is crossed. Coherent switching between the two ordered phases is demonstrated.
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.
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.
Five-dimensional Brans-Dicke theory and cosmic acceleration
Qiang Lie; Ma Yongge; Han Muxin; Yu Dan [Department of Physics, Beijing Normal University, Beijing, 100875 (China)
2005-03-15
We consider a 5-dimensional scalar-tensor theory which is a direct generalization of the original 4-dimensional Brans-Dicke theory to five dimensions. By assuming that there is a hypersurface-orthogonal spacelike Killing vector field in the underlying 5-dimensional spacetime, the theory is reduced to a 4-dimensional theory where the 4-metric is coupled with two scalar fields. The cosmological implication of this reduced theory is then studied in the Robertson-Walker model. It turns out that the two scalar fields may account naturally for the present accelerated expansion of our universe. The observational restriction of the reduced cosmological model is also analyzed.
Cosmology in Brans-Dicke theory with a scalar potential
Caroline Santos; Ruth Gregory
1996-11-27
We consider the general behaviour of cosmologies in Brans-Dicke theory where the dilaton is self-interacting via a potential $V(\\Phi)$. We show that the general radiation universe is a two-dimensional dynamical system whereas the dust or false vacuum universe is three-dimensional. This is in contrast to the non-interacting dilaton which has uniformly a two-dimensional phase space. We find the phase spaces in each case and the general behaviour of the cosmologies.
Quantum teleportation of an arbitrary superposition of atomic Dicke states
Di, TG; Muthukrishnan, A.; Scully, Marlan O.; Zubairy, M. Suhail
2005-01-01
, USA 2Departments of Chemistry and Aerospace & Mechanical Engineering, Princeton University, New Jersey 08544, USA sReceived 20 December 2004; revised manuscript received 18 February 2005; published 9 June 2005d We propose a scheme for teleporting... in cavity A that Alice wants to teleport is assumed to be a ssymmetricd Dicke-state superposition of the form uclAin = C0I ucclA + C1I ubclA + ucblA?2 + C2 I ubblA, s1d where ual, ubl, and ucl are the states of each L-type three- level atom ssee Fig. 1...
Online Calendar Henry James's Letters and A Biographical Register of Henry James's Correspondents
NSDL National Science Digital Library
Gunter, Susan E.
Hosted by the University of Nebraska Press and created by Steven H. Jobe and Susan E. Gunter, this site offers information on all known letters written by novelist Henry James (more than 10,500) and brief biographical information on the (more than 1,000) recipients of these letters. Users can search the database by date, correspondent, repository, or keyword. Search returns include the date and place of the letter's composition, the addressee's name and identity, the publication source, and the repository in which the letter is held. The site also features comprehensive lists of all published sources of the letters and the more than 130 repositories and private collections where they are held, and statistics on the letters and correspondents. Henry James scholars will quickly find this site to be an invaluable research tool.
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.
Henry Oldenburg - Shaping the Royal Society
NASA Astrophysics Data System (ADS)
Boas Hall, Marie
2002-03-01
Henry Oldenburg, born in 1619 in Bremen, Germany, first came to England as a diplomat on a mission to see Oliver Cromwell. He stayed on in England and in 1662 became the Secretary of the Royal Society, and its best known member to the entire learned world of his time. Through his extensive correspondence, now published, he disseminated the Society's ideals and methods at home and abroad. He fostered and encouraged the talents of many scientists later to be far more famous than he, including Newton, Flamsteed, Malpighi, and Leeuwenhoek with whom, as with many others, he developed real friendship. He founded and edited the Philosophical Transactions, the world's oldest scientific journal.His career sheds new light on the intellectual world of his time, especially its scientific aspects, and on the development of the Royal Society; his private life expands our knowledge of social mobility, the urban society, and the religious views of his time.
Victor Henri: 111 years of his equation.
Cornish-Bowden, Athel; Mazat, Jean-Pierre; Nicolas, Serge
2014-12-01
Victor Henri's great contribution to the understanding of enzyme kinetics and mechanism is not always given the credit that it deserves. In addition, his earlier work in experimental psychology is totally unknown to biochemists, and his later work in spectroscopy and photobiology almost equally so. Applying great rigour to his analysis he succeeded in obtaining a model of enzyme action that explained all of the observations available to him, and he showed why the considerable amount of work done in the preceding decade had not led to understanding. His view was that only physical chemistry could explain the behaviour of enzymes, and that models should be judged in accordance with their capacity not only to explain previously known facts but also to predict new observations against which they could be tested. The kinetic equation usually attributed to Michaelis and Menten was in reality due to him. His thesis of 1903 is now available in English. PMID:25252213
Mills, Dan
2012-01-01
signi#15;cant contribution to the emerging history of human joy. John Scheckter and Henry Neville. #31;e Isle of Pines, 1668: Henry Neville?s Uncertain Utopia. Farnham: Ashgate, 2011. xvii + 222 pp. $99.95. Review by #11;#25;#27; #21;#18; #26;, #24...?s edition is the #15;rst of its kind. Scheckter?s new critical edition of Neville?s Isle of Pines, entitled #31;e Isle of Pines, 1668: Henry Neville?s Uncertain Utopia, also includes #15;ve chapters of interpretation that analyze this enigmatic...
Dynamical complexity of the Brans-Dicke cosmology
Hrycyna, Orest; Szyd?owski, Marek E-mail: marek.szydlowski@uj.edu.pl
2013-12-01
The dynamics of the Brans-Dicke theory with a quadratic scalar field potential function and barotropic matter is investigated. The dynamical system methods are used to reveal complexity of dynamical evolution in homogeneous and isotropic cosmological models. The structure of phase space crucially depends on the parameter of the theory ?{sub BD} as well as barotropic matter index w{sub m}. In our analysis these parameters are treated as bifurcation parameters. We found sets of values of these parameters which lead to generic evolutional scenarios. We show that in isotropic and homogeneous models in the Brans-Dicke theory with a quadratic potential function the de Sitter state appears naturally. Stability conditions of this state are fully investigated. It is shown that these models can explain accelerated expansion of the Universe without the assumption of the substantial form of dark matter and dark energy. The Poincare construction of compactified phase space with a circle at infinity is used to show that phase space trajectories in a physical region can be equipped with a structure of a vector field on nontrivial topological closed space. For ?{sub BD} < ?3/2 we show new types of early and late time evolution leading from the anti-de Sitter to the de Sitter state through an asymmetric bounce. In the theory without a ghost we find bouncing solutions and the coexistence of the bounces and the singularity. Following the Peixoto theorem some conclusions about structural stability are drawn.
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.
Nucleation of vacuum bubbles in Brans-Dicke type theory
Hongsu Kim; Bum-Hoon Lee; Wonwoo Lee; Young Jae Lee; Dong-han Yeom
2011-07-19
In this paper, we explore the nucleation of vacuum bubbles in the Brans-Dicke type theory of gravity. In the Euclidean signature, we evaluate the fields at the vacuum bubbles as solutions of the Euler-Lagrange equations of motion as well as the bubble nucleation probabilities by integrating the Euclidean action. We illustrate three possible ways to obtain vacuum bubbles: true vacuum bubbles for \\omega>-3/2, false vacuum bubbles for \\omegabubbles for \\omega>-3/2 when the vacuum energy of the false vacuum in the potential of the Einstein frame is less than that of the true vacuum. After the bubble is nucleated at the t=0 surface, we can smoothly interpolate the field combinations to some solutions in the Lorentzian signature and consistently continue their subsequent evolutions. Therefore, we conclude that, in general scalar-tensor theories like this Brans-Dicke type theories, which may include and represent certain features of string theory, vacuum bubbles come in false vacuum bubbles as well as in true vacuum bubbles, as long as a special condition is assumed on the potential.
Nucleation of vacuum bubbles in Brans-Dicke type theory
NASA Astrophysics Data System (ADS)
Kim, Hongsu; Lee, Bum-Hoon; Lee, Wonwoo; Lee, Young Jae; Yeom, Dong-Han
2011-07-01
In this paper, we explore the nucleation of vacuum bubbles in the Brans-Dicke type theory of gravity. In the Euclidean signature, we evaluate the fields at the vacuum bubbles as solutions of the Euler-Lagrange equations of motion as well as the bubble nucleation probabilities by integrating the Euclidean action. We illustrate three possible ways to obtain vacuum bubbles: true vacuum bubbles for ?>-3/2, false vacuum bubbles for ?<-3/2, and false vacuum bubbles for ?>-3/2 when the vacuum energy of the false vacuum in the potential of the Einstein frame is less than that of the true vacuum. After the bubble is nucleated at the t=0 surface, we can smoothly interpolate the field combinations to some solutions in the Lorentzian signature and consistently continue their subsequent evolutions. Therefore, we conclude that, in general scalar-tensor theories like this Brans-Dicke type theories, which may include and represent certain features of string theory, vacuum bubbles come in false vacuum bubbles as well as in true vacuum bubbles, as long as a special condition is assumed on the potential.
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
12. Historic American Buildings Survey Photographed by Henry F. Withey ...
12. Historic American Buildings Survey Photographed by Henry F. Withey May 1937 S. W. CORRIDOR OF PATIO. - Casa del Rancho Santa Margarita y Los Flores, U.S. Highway 101, Oceanside, San Diego County, CA
3. Historic American Buildings Survey Photographed by Henry F. Withey, ...
3. Historic American Buildings Survey Photographed by Henry F. Withey, September, 1936 HALL ENTRANCE, SOUTH FRONT HOUSE #2 - Guadalupe Rancho Adobes, Adobe No. 2, 120 Third Avenue, Guadalupe, Santa Barbara County, CA
1. Historic American Buildings Survey Photographed by Henry F. Withey ...
1. Historic American Buildings Survey Photographed by Henry F. Withey September, 1936 SOUTH AND WEST FRONT. HOUSE #2 - Guadalupe Rancho Adobes, Adobe No. 2, 120 Third Avenue, Guadalupe, Santa Barbara County, CA
1. Historic American Buildings Survey Photographed by Henry F. Withey ...
1. Historic American Buildings Survey Photographed by Henry F. Withey September, 1936 STREET FRONT, SOUTH HOUSE #1 - Guadalupe Rancho Adobes, Adobe No. 1, 114 Third Avenue, Guadalupe, Santa Barbara County, CA
2. Historic American Buildings Survey Photographed by Henry F. Withey, ...
2. Historic American Buildings Survey Photographed by Henry F. Withey, September 1936 SOUTH AND EAST FRONT. HOUSE #2 - Guadalupe Rancho Adobes, Adobe No. 2, 120 Third Avenue, Guadalupe, Santa Barbara County, CA
2. Historic American Buildings Survey Photographed by Henry F. Withey, ...
2. Historic American Buildings Survey Photographed by Henry F. Withey, September, 1936 HALL ENTRANCE ON EAST FRONT. HOUSE #1 - Guadalupe Rancho Adobes, Adobe No. 1, 114 Third Avenue, Guadalupe, Santa Barbara County, CA
9. Historic American Buildings Survey Photographed by Henry F. Withey ...
9. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF TANNERY (FROM WEST CORNER) - 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
4. Historic American Buildings Survey Photographed by Henry F. Withey ...
4. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 RUINS OF SMITHY FROM SO. WEST CORNER. - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA
3. Historic American Buildings Survey Photographed by Henry F. Withey ...
3. Historic American Buildings Survey Photographed by Henry F. Withey April 1937. RUINS OF SMITHY (LOOKING S.W.) - Mission San Gabriel Arcangel, Industrial Shop (Ruins), West Mission Drive & Junipero Serra Street, San Gabriel, Los Angeles County, CA
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
2. Historic American Buildings Survey Photographed by Henry F. Withey ...
2. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 SOUTHWEST FRONT OF PADRES QUARTERS AND CHURCH - Mission San Gabriel Arcngel, 428 South Mission Drive, San Gabriel, Los Angeles County, CA
3. Historic American Buildings Survey Photographed by Henry F. Withey ...
3. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 SOUTHWEST FRONT OF CHURCH (FROM WEST END) - Mission San Gabriel Arcngel, 428 South Mission Drive, San Gabriel, Los Angeles County, CA
5. Historic American Buildings Survey Photographed by Henry F. Withey ...
5. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 ENTRANCE DETAIL (S. W. FRONT) - Mission San Gabriel Arcngel, 428 South Mission Drive, San Gabriel, Los Angeles County, CA
1. Historic American Buildings Survey Photographed by Henry F. Withey ...
1. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 SOUTHWEST FRONT OF PADRES QUARTERS AND CHURCH BELFRY. - Mission San Gabriel Arcngel, 428 South Mission Drive, 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 SOUTHEAST CORNER OF CHURCH - Mission San Gabriel Arcngel, 428 South Mission Drive, San Gabriel, Los Angeles County, CA
6. Historic American Buildings Survey Photographed by Henry F. Withey ...
6. Historic American Buildings Survey Photographed by Henry F. Withey April 1937 SOUTHWEST FRONT OF CHURCH (SOUTHEAST END) - Mission San Gabriel Arcngel, 428 South Mission Drive, San Gabriel, Los Angeles County, CA
4. Historic American Buildings Survey Photographed by Henry F. Withey ...
4. Historic American Buildings Survey Photographed by Henry F. Withey December 1936 WEST REAR FROM GARDEN SHOWING SOUTH WALL OF PATIO. - Andres Pico House, 10940 Sepulveda Boulevard, San Fernando, Los Angeles County, CA
1. Henry Beardsley standing in front of his store in ...
1. Henry Beardsley standing in front of his store in Ohio. Photographer unknown, 1887. Source: William M. Beardsley - Waddell Dam, On Agua Fria River, 35 miles northwest of Phoenix, Phoenix, Maricopa County, AZ
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
Weber, Thomas J.; Markillie, Lye Meng; Chrisler, William B.; Vielhauer, George A.; Regan, John W.
2002-12-09
Prostaglandin F2alpha(PGF2alpha) modulates clonal selection processes in the mouse skin model of carcinogenesis. In this study we investigated whether JB6 mouse epidermal cells expressed a functional PGF2alpha receptor (FP) coupled with a cell-transformation response. Treatment of JB6 cells with an FP aonist (fluprostenol) potently (pM-nM) increased anchorage-dependent and anchorage-independent growth. Inositol phospholipid accumulation and extracellular signal-regulated kinase (Erk) activity were increased in cells treated with FP agonists, consistent with established FP-related signal transduction. FP mRNA was detected by reverse transcription-polymerase chain reaction, and the average specific [3H}PGF2alpha binding was 8.25+ or - 0.95 fmol/mg protein. Erk activity and colongy size were increased by cotreatment of JB6 cells with epidermal growth factor (EGF) and fluprostenol to a greater extent than with either treatment alone, whereas the cotreatment effect on colony number appeared to be simply additive. Collectively, our data indicted th JB6 cells expressed a functional FP coupled with transformation-related signal transduction and the regulation of clonal selection processes. Erk activity appears to be a convergence point in the EGF and FP pathways. The data raise the possibility that the FP contributes to clonal selection processes but probably plays a more important role as a response modifier.
Tests for Distributed, Non-focal Brain Activations K.J. Worsley J-B. Poline
Worsley, Keith
activations are focal or very localized. However the brain's response to cognitive or sensorimotor challengeTests for Distributed, Non-focal Brain Activations K.J. Worsley J-B. Poline A.C. Vandal and K. West, Montreal, Quebec, Canada H3A 2K6, and The Welcome Department of Cognitive Neurology, Queen
TIME-FREQUENCY-MODULATION REPRESENTATION OF STOCHASTIC SIGNALS Philip J.B. Jackson
Jackson, Philip JB
TIME-FREQUENCY-MODULATION REPRESENTATION OF STOCHASTIC SIGNALS Philip J.B. Jackson Centre is modulated by a deterministic sig- nal, it is often useful to determine the signal's parameters. A method of estimating the modulation index m is presented for noise whose amplitude is modulated by a periodic signal
On localised hotspots of an urban crime model David J.B. Lloyd
Lloyd, David
On localised hotspots of an urban crime model David J.B. Lloyd Department of Mathematics University, GU2 7XH, UK January 22, 2013 Abstract We investigate stationary, spatially localised crime hotspots on the real line and the plane of an urban crime model of Short et al. [Math. Mod. Meth. Appl. Sci. Vol. 18
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
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....
Draft Genome Sequences of Streptococcus bovis Strains ATCC 33317 and JB1
Benahmed, Faiza H.; Gopinath, Gopal R.; Harbottle, Heather; Cotta, Michael A.; Luo, Yan; Henderson, Carol; Teri, Plona; Soppet, Daniel; Rasmussen, Mark; Davidson, Maureen
2014-01-01
We report the draft genome sequences of Streptococcus bovis strain ATCC 33317 (CVM42251) isolated from cow dung and strain JB1 (CVM42252) isolated from a cow rumen in 1977. The strains were sequenced using the Genome Sequencer FLX 454 system. The genome sizes are approximately 2Mb and 2.2Mb, respectively. PMID:25301652
Degradation ofMono-,Di, andTrihalogenated Benzoic Acids byPseudomonas aeruginosa JB2
W. J. HICKEYtAND; D. D. FOCHT
2,3-dichlorobenzoate-, 2,5-dichlorobenzoate-. Whilechlorocatechols wereoxidized bythe mutants atwild-type levels, oxidation of2-chloro- and2,3-and2,5-dichlorobenzoates wassubstantially diminished. Thesefindings suggested thatstrain JB2possessed, inaddition tothebenzoate dioxygenase, a halobenzoate dioxygenase thatwasnecessary forthedegradation ofchlorobenzoates substituted intheortho position.
GWS-Lab Report 2007 by J.B. de Smeth, GWS-laboratory
for water quality analysis; major anions by spectrometry, pH, electric conductivity (EC) and major cations of WREM students in water quality sampling and on the spot analysis along the Boekelosebeek. Some chemical 2007 J.B. de Smeth, Head GS-lab. 1. Overview The Geochemical Water and Soil Laboratory operated
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
Speaker-Dependent Audio-Visual Emotion Recognition Sanaul Haq and Philip J.B. Jackson
Jackson, Philip JB
Speaker-Dependent Audio-Visual Emotion Recognition Sanaul Haq and Philip J.B. Jackson Centre Speaker-dependent audio-visual emotion recognition was performed using an English database (4 male actors, 7 emotions). A total of 106 audio and 240 visual features were extracted, and feature selection
Speaker-Dependent Audio-Visual Emotion Recognition Sanaul Haq and Philip J.B. Jackson
Jackson, Philip JB
Speaker-Dependent Audio-Visual Emotion Recognition Sanaul Haq and Philip J.B. Jackson Centre.jackson}@surrey.ac.uk Abstract This paper explores the recognition of expressed emotion from speech and facial gestures for the speaker-dependent case. Ex- periments were performed on an English audio-visual emotional database
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.
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.
Experimental quantum networking protocols via four-qubit hyperentangled Dicke states.
Chiuri, A; Greganti, C; Paternostro, M; Vallone, G; Mataloni, P
2012-10-26
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. PMID:23215188
Black Holes in Brans-Dicke Theory with a Cosmological Constant
C. J. Gao; S. N. Zhang
2006-04-20
Since the Brans-Dicke theory is conformal related to the dilaton gravity theory, by applying a conformal transformation to the dilaton gravity theory, we derived the cosmological constant term in the Brans-Dicke theory and the physical solution of black holes with the cosmological constant. It is found that, in four dimensions, the solution is just the Kerr-Newman-de Sitter solution with a constant scalar field. However, in $n>4$ dimensions, the solution is not yet the $n$ dimensional Kerr-Newman-de Sitter solution and the scalar field is not a constant in general. In Brans-Dicke-Ni theory, the resulting solution is also not yet the Kerr-Newman-de Sitter one even in four dimensions. The higher dimensional origin of the Brans-Dicke scalar field is briefly discussed.
Motional frequency shifts of trapped ions in the Lamb-Dicke regime
Lizuain, I.; Muga, J. G.; Eschner, J.
2007-09-15
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 behavior 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.
Interpretability in PRA Marta Bilkova Dick de Jongh Joost J. Joosten
Amsterdam, University of
Interpretability in PRA Marta Bilkova Dick de Jongh Joost J. Joosten June 30, 2008 Abstract extensions of a certain base the- ory T. An easy example of such a structural property is the transitivity
Generation of arbitrary Dicke states in spinor Bose-Einstein condensates
S. Raghavan; H. Pu; P. Meystre; N. P. Bigelow
2000-10-10
We demonstrate that the combination of two-body collisions and applied Rabi pulses makes it possible to prepare arbitrary Dicke (spin) states as well as maximally entangled states by appropriate sequencing of external fields.
Wilbur Dick Nesbit (1871-1927) Papers, 1896-1948 Series No. LIII
, including those for the successful #12;Wilbur Dick Nesbit -2- musical comedy, "The Girl of My Dreams." He director of the 3rd Liberty Loans cam- paign. Nesbit took an active role in many clubs, civic and fraternal
Cosmic string configuration in a five dimensional Brans-Dicke theory
Bezerra, V. B. [Departamento de Fisica, Universidade Federal da Paraiba, 58059-970, Joao Pessoa, PB (Brazil); Ferreira, C. N. [Nucleo de Estudos em Fisica, Instituto Federal de Educacao, Ciencia e Tecnologia Fluminense, 28030-130, Campos dos Goytacazes, RJ (Brazil); Marques, G. de A [Unidade Academica de Fisica, Universidade Federal de Campina Grande, 58109-790, Campina Grande, PB (Brazil)
2010-01-15
We consider a scalar field interacting with a cosmic string configuration. The origin of the scalar field is given by a compactification mechanism in the context of a five-dimensional Brans-Dicke theory. We analyze the behavior of a charged cosmic string given by the Maxwell-Chern-Simons term on the 3-brane. The Cosmic Microwave Background Radiation constraint is used to analyze the possibility of optical activity effect in connection with the Brans-Dicke parameter {omega}. 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 {omega} imposes stringent constraints on the mass of the dilaton and help us to understand the energy scales. In this scenario the lifetime of the dilaton which decays into light gauge bosons as well as the dependence of this phenomenon with the Brans-Dicke parameter are estimated.
Non-equilibrium Dynamics of an Optomechanical Dicke Model
NASA Astrophysics Data System (ADS)
Kamanasish, Debnath; Aranya, B. Bhattacherjee
2015-07-01
Motivated by the experimental realization of Dicke model in optical cavities, we model an optomechanical system consisting of two-level BEC atoms with transverse pumping. We investigate the transition from normal and inverted state to the superradiant phase through a detailed study of the phase portraits of the system. The rich phase portraits generated by analytical arguments display two types of superradiant phases, regions of coexistence and some portion determining the persistent oscillations. We study the time evolution of the system from any phase and discuss the role of mirror frequency in reaching their attractors. Further, we add an external mechanical pump to the mirror which is capable of changing the mirror frequency through radiation pressure and study the impact of the pump on the phase portraits and the dynamics of the system. We find the external mirror frequency changing the phase portraits and even shifting the critical transition point, thereby predicting a system with controllable phase transition.
Scale transformation, modified gravity, and Brans-Dicke theory
F. Darabi
2010-08-24
A model of Einstein-Hilbert action subject to the scale transformation is studied. By introducing a dilaton field as a means of scale transformation a new action is obtained whose Einstein field equations are consistent with traceless matter with non-vanishing modified terms together with dynamical cosmological and gravitational coupling terms. The obtained modified Einstein equations are neither those in $f(R)$ metric formalism nor the ones in $f({\\cal R})$ Palatini formalism, whereas the modified source terms are {\\it formally} equivalent to those of $f({\\cal R})=\\frac{1}{2}{\\cal R}^2$ gravity in Palatini formalism. The correspondence between the present model, the modified gravity theory, and Brans-Dicke theory with $\\omega=-\\frac{3}{2}$ is explicitly shown, provided the dilaton field is condensated to its vacuum state.
Cosmic Evolution in Self-Interacting Brans-Dicke Cosmology
Muhammad Sharif; Saira Waheed
2012-11-16
In this paper, we investigate the nature of self-interacting potential that can support the accelerated expansion of the universe as indicated by observational data. For this purpose, we consider the Bianchi type I (BI) universe model in the Brans-Dicke (BD) field scenario and use a power law for both the scalar field and the scale factor. It is found that the accelerated expansion of the universe can be discussed for a positive power law potential with negative values of the BD parameter. We also explore the evolution of energy density perturbations. This analysis indicates that the model allows growing modes for negative values of the BD parameter and $m>0$.
Dynamical evolution of boson stars in Brans-Dicke theory
Jayashree Balakrishna; Hisa-aki Shinkai
1998-05-07
We study the dynamics of a self-gravitating scalar field solitonic object (boson star) in the Jordan-Brans-Dicke (BD) theory of gravity. We show dynamical processes of this system such as (i) black hole formation of perturbed equilibrium configuration on an unstable branch; (ii) migration of perturbed equilibrium configuration from the unstable branch to stable branch; (iii) transition from excited state to a ground state. We find that the dynamical behavior of boson stars in BD theory is quite similar to that in general relativity (GR), with comparable scalar wave emission. We also demonstrate the formation of a stable boson star from a Gaussian scalar field packet with flat gravitational scalar field initial data. This suggests that boson stars can be formed in the BD theory in much the same way as in GR.
Wormholes and naked singularities in BransDicke cosmology
NASA Astrophysics Data System (ADS)
Tretyakova, D. A.; Latosh, B. N.; Alexeyev, S. O.
2015-09-01
We perform an analytical and numerical study of static spherically symmetric solutions in the context of the BransDicke-like cosmological model by Elizalde et al (2004 Phys. Rev. D 70 043539) with an exponential potential. In this model the phantom regime arises without the appearance of any ghost degree of freedom due to the specific form of coupling. For certain parameter ranges the model contains a regular solution that we interpret as a wormhole in an otherwise de Sitter Universe. We put several bounds on the parameter values: ? \\lt 0,{? }2/| ? | \\lt {10}-5,22.7? {? }0? 25. The numerical solution could mimic the Schwarzschild one, so the original model is consistent with astrophysical and cosmological observational data. However, differences between our solution and the Schwarzschild one can be quite large, so black hole candidate observations could probably place further limits on the {? }0 value.
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.
Phase transition in the periodically pulsed Dicke model
NASA Astrophysics Data System (ADS)
Dasgupta, Sayak; Bhattacharya, Utso; Dutta, Amit
2015-05-01
We study the effect of pulsed driving and kicked driving of the interaction term on the nonequilibrium phase transition in the Dicke model. Within the framework of Floquet theory, we observe the emergence of new nontrivial phases on impingement by such periodic pulses. Notably, our study reveals that a greater control over the dynamical quantum criticality is possible through the variation of multiple parameters related to the pulse, as opposed to a single parameter control in a monochromatic drive. Furthermore, the probability of the system remaining trapped in a metastable state during the observed first order transition from the superradiant to normal phase is found to be higher for small number of kicks (or pulses) in comparison to the sinusoidal perturbation.
Wormholes and Naked Singularities in Brans-Dicke cosmology
D. A. Tretyakova; B. N. Latosh; S. O. Alexeyev
2015-07-01
We perform analytical and numerical study of static spherically symmetric solutions in the context of Brans-Dicke-like cosmological model by Elizalde et al. with an exponential potential. In this model the phantom regime arises without the appearance of any ghost degree of freedom due to the specific form of coupling. For the certain parameter ranges the model contains a regular solution which we interpret as a wormhole in an otherwise dS Universe. We put several bounds on the parameter values: $\\omegaSchwarzschild one, so the original model is consistent with astrophysical and cosmological observational data. However differences between our solution and the Schwarzschild one can be quite large, so black hole candidate observations could probably place further limits on the $\\phi_0$ value.
Brans-Dicke Chameleonic Cosmology and Cosmic Evolution
NASA Astrophysics Data System (ADS)
Sharif, M.; Waheed, Saira
2012-10-01
We study the cosmic evolution in radiation and matter dominated epochs of the universe in chameleon Brans-Dicke (BD) as well as generalized chameleon BD cosmology. For this purpose, we consider Bianchi I universe model with matter contents as perfect fluid and the power law ansatz for scale factors, scalar field, interacting function f(?), chameleon potential V(?) and the BD parameter ?(?). Using constraints on the involved parameters, it is shown that only the decelerated expansion of the universe can be discussed for these eras which is consistent with the astronomical observations. The graphical behavior of these functions for large values of the BD parameter (as suggested by local gravity tests) are also given. Finally, we evaluate statefinders as well as cosmological distances for obtained models.
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.
Images of Moby-Dick: An exhibition of editions of Herman Melville's great novel of whaling
Mason, Alexandra; Helyar, James
1995-01-01
of Moby-Dick presents a selection of these illustrated editions, collected by Professor Schultz during her study of Moby-Dick and now generously donated to the Kenneth Spencer Research Library. Professor Schultz's gift collection, supplemented here... in 1919; re-printings of these plates were issued as late as 1950. Tanselle 3e. Gift of Elizabeth A. Schultz. Between the first publication of Shute's illustrations in 1892 and the Melville revival of the 1920s only one illustrated edition...
Role of Brans-Dicke Theory with or without Self-Interacting Potential in Cosmic Acceleration
NASA Astrophysics Data System (ADS)
Chakraborty, Writambhara; Debnath, Ujjal
2009-01-01
In this work we have studied the possibility of obtaining cosmic acceleration in Brans-Dicke theory with varying or constant ? (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 ? for closed Universe.
James Paget Henry--a retrospective.
Meehan, J P; Meehan, W P
1997-01-01
James Paget Henry really began his productive research career at the outset of the second world war. His studies of acceleration and the anoxia of high altitude were supported by the development of then new techniques of measuring and recording critical physiologic parameters such as vascular pressures, respiratory functions and haemoglobin saturation. His inquisitive mind made productive use of the instruments that had to be made by skilled instrument makers working in university shops. Much of this instrumentation has now found its way into the clinical arena where it is now the main armamentarium of cardiac diagnostic and respiratory function laboratories. His work in the space program preceeded that of the Russians but did not get recognition until Sputnik awakened the world to the possibilities of space flight. His development of the concept of a cardiovascular basis for fluid volume control and the supportive investigative work undertaken constitute a milestone in the annals of experimental physiology. The chimpanzees used in Project Mercury were found to be hypertensive which was related to the method of capture used by the commercial suppliers. This lead Jim to study the effect of early experience on resting blood pressure, an effort that soon developed into provocative studies of the biological basis of the stress response. PMID:9401600
NASA Astrophysics Data System (ADS)
Bobeck, Patricia
2006-09-01
A recently published English translation of the Les Fontaines publiques de la ville de Dijon1 provides access to Henry Darcy's own words on the importance of water for public sanitation and on questions engineers face in building water supply systems. Written near the end of Darcy's life, the book is a compendium of the water knowledge he had gained over decades and his opinions on these topics reveal his personality. In the 1840s, Darcy built a water supply system to provide water to 120 street fountains for domestic purposes, street washing and firefighting. Surrounded by poverty, Darcy insisted on free water for the poor and on sharing the spring water with towns located along the aqueduct that brought it to Dijon. In the preface to the book, Darcy introduces his experiment on water flow through sand with the modest words to my knowledge, no one has experimentally demonstrated the laws of water flow through sand. This article provides a sampling of the book's insights into the personality of this remarkable man.
Cosmic microwave background with Brans-Dicke gravity. I. Covariant formulation
Wu Fengquan; Qiang Lie; Wang Xin; Chen Xuelei [National Astronomical Observatories, Chinese Academy of Sciences, 20A Datun Road, Chaoyang District, Beijing 100012 (China)
2010-10-15
In the covariant cosmological perturbation theory, a 1+3 decomposition ensures that all variables in the frame-independent equations are covariant and gauge invariant and that they have clear physical interpretations. We develop this formalism in the case of Brans-Dicke gravity, and apply this method to the calculation of CMB anisotropy and large scale structures. We modify the publicly available Boltzmann code CAMB to calculate numerically the evolution of the background and adiabatic perturbations, and obtain the temperature and polarization spectra of Brans-Dicke theory for both scalar and tensor modes; the tensor mode results for Brans-Dicke gravity are obtained numerically for the first time. We first present our theoretical formalism in detail, and then explicitly describe the techniques used in modifying the CAMB code. These techniques are also very useful for other gravity models. Next we compare the CMB and large scale structure spectra in Brans-Dicke theory with those in the standard general relativity theory. At last, we investigate the integrated Sachs-Wolfe effect and the CMB lensing effect in Brans-Dicke theory. Constraints on the Brans-Dicke model with current observational data are presented in a companion paper [F. Wu and X. Chen, following Article, Phys. Rev. D 82, 083003 (2010)] (paper II).
Applicability of Henry's Law to helium solubility in olivine
NASA Astrophysics Data System (ADS)
Jackson, C.; Parman, S. W.; Kelley, S. P.; Cooper, R. F.
2013-12-01
Applicability of Henry's Law to helium solubility in olivine We have experimentally determined helium solubility in San Carlos olivine across a range of helium partial pressures (PHe) with the goal of quantifying how noble gases behave during partial melting of peridotite. Helium solubility in olivine correlates linearly with PHe between 55 and 1680 bar. This linear relationship suggests Henry's Law is applicable to helium dissolution into olivine up to 1680 bar PHe, providing a basis for extrapolation of solubility relationships determined at high PHe to natural systems. This is the first demonstration of Henry's Law for helium dissolution into olivine. Averaging all the data of the PHe series yields a Henry's coefficient of 3.8(3.1)10-12 mol g-1 bar-1. However, the population of Henry's coefficients shows a positive skew (skewness = 1.17), i.e. the data are skewed to higher values. This skew is reflected in the large standard deviation of the population of Henry's coefficients. Averaging the median values from each experiment yields a lower Henry's coefficient and standard deviation: 3.2( 2.3)10-12 mol g-1 bar-1. Combining the presently determined helium Henry's coefficient for olivine with previous determinations of helium Henry's coefficients for basaltic melts (e.g. 1) yields a partition coefficient of ~10-4. This value is similar to previous determinations obtained at higher PHe (2). The applicability of Henry's Law here suggests helium is incorporated onto relatively abundant sites within olivine that are not saturated by 1680 bar PHe or ~510-9 mol g-1. Large radius vacancies, i.e. oxygen vacancies, are energetically favorable sites for noble gas dissolution (3). However, oxygen vacancies are not abundant enough in San Carlos olivine to account for this solubility (e.g. 4), suggesting the 3x10-12 mol g-1 bar-1 Henry's coefficient is associated with interstitial dissolution of helium. Helium was dissolved into olivine using an externally heated pressure vessel (Brown University). The starting materials were prepared by cutting gem-quality San Carlos olivine (~Fo90) into small blocks (~421 mm) using a diamond wafering blade saw and polishing with alumina slurries and colloidal silica. Analysis was completed by laser ablation-mass spectrometry using a 193 nm excimer laser and a MAP 215-50 specifically tuned for He (Open University, UK). Laser ablation pit depth varied from 2 to 40 ?m, and no correlation between pit depth and [He] is observed after accounting for variations PHe across the different experiments. This lack of correlation indicates a close approach to equilibrium was achieved over the experimental durations. Two analyses yielded spuriously high [He] (>3 std. dev. from the population mean, n = 85), and these analyses were not used to calculate Henry's coefficients. The two spuriously high analyses, in combination with the right skew of Henry's coefficients calculated from individual data points, suggests gem-quality San Carlos olivine contains volumes with anomalously high helium solubility. The nature of these volumes is currently under investigation. However, despite their presence, helium is still highly incompatible in olivine during partial melting. [1] Lux GCA 1987 [2] Heber et al. GCA 2007 [3] Shcheka & Keppler Nature 2012 [4] Walker et al. PEPI 2009
Henry's law constants of chlorinated solvents at elevated temperatures.
Chen, Fei; Freedman, David L; Falta, Ronald W; Murdoch, Lawrence C
2012-01-01
Henry's law constants for 12 chlorinated volatile organic compounds (CVOCs) were measured as a function of temperature ranging from 8 to 93C, using the modified equilibrium partitioning in closed system (EPICS) method. The chlorinated compounds include tetrachloroethylene, trichloroethylene, cis-1,2-dichloroethylene, vinyl chloride, 1,1,1-trichloroethane, 1,1-dichloroethane, 1,2-dichloroethane, chloroethane, carbon tetrachloride, chloroform, dichloromethane, and chloromethane. The variation in Henry's constants for these compounds as a function of temperature ranged from around 3-fold (chloroethane) to 30-fold (1,2-dichloroethane). Aqueous solubilities of the pure compounds were measured over the temperature range of 8-75C. The temperature dependence of Henry's constant was predicted using the ratio of pure vapor pressure to aqueous solubility, both of which are functions of temperature. The calculated Henry's constants are in a reasonable agreement with the measured results. With the improved data on Henry's law constants at high temperatures measured in this study, it will be possible to more accurately model subsurface remediation processes that operate near the boiling point of water. PMID:22071373
The Theses, Papers and Publications of Henry D. Bowen and His Students
Walter, M.Todd
The Theses, Papers and Publications of Henry D. Bowen and His Students 1952 1991 The breadth;Theses, Papers and Publications of HENRY D. BOWEN and His Graduate Students: 1952 1991 North Carolina 1992 1992 H.D. Bowen ALL RIGHTS RESERVED Worldwide i #12;The Theses, Papers and Publications of Henry
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
Weber, Thomas J.; Markillie, Lye MENG.; Chrisler, William B.; Vielhauer, George A.; Regan, John W.
2002-12-01
Prostaglandin F2a (PGF2a) has been associated with the modulation of clonal selection processes in the mouse skin model of carcinogenesis. We have investigated whether JB6 mouse epidermal cells express a functional PGF2a receptor (FP) coupled to the regulation of anchorage-dependent and -independent growth. Treatment of JB6 cells with a FP receptor ligand (fluprostenol) potently (pM-nM) increased anchorage-dependent and -independent growth, as determined by a battery of in vitro assays. Treatment of JB6 cells with PGF2a and fluprostenol increased inositol phospholipid accumulation and extracellular signal regulated kinase (ERK) activity, consistent with FP receptor-related signaling. FP receptor mRNA was detected by reverse transcription-polymerase chain reaction and a radiolabel binding assay determined the average specific [3H]PGF2a binding to be 8.25 + 0.95 fmol/mg protein. Treatment of cells with fluprostenol as a single exposure resulted in a significant increase in anchorage-dependent and -independent growth in media containing low (0.1-0.5%), but not high (5%) concentrations of fetal bovine serum (FBS). In contrast, treatment of cells with fluprostenol at two day intervals resulted in a more robust growth response under anchorage-dependent conditions only in media containing low FBS concentrations; and under anchorage-independent conditions only in media containing high FBS concentrations. ERK activation and colony size were increased by cotreatment of JB6 cells with EGF and fluprostenol to a greater extent than either treatment alone, while the cotreatment effect on colony number appeared to be simply additive. In summary, FBS concentration and signal oscillation exert pronounced effects on the biological response to a FP receptor agonist. The data raise the possibility that the FP receptor may independently contribute to clonal selection processes, but may play a more important role as a response modifier.
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
Henry's law constant of methanol in pulping spent liquors
Zhu, J.Y.; Liu, P.H.; Chai, X.S.; Bullock, K.R.; Teja, A.S.
2000-05-01
A direct headspace gas chromatographic method was used to measure Henry's constants of methanol in pulping spent liquors. The liquors were from kraft pulp mills and laboratory pulping experiments using various wood species. All liquors studied had a total solid less than 25%. It was found that temperature and concentration of inorganic solids, mainly sodium salts, are the two variables that significantly affect the Henry's constants of methanol. A two- parameter (temperature and liquor total solids content) correlation was developed based on the experimental data and is reported in this study.
FRW cosmology from five dimensional vacuum Brans-Dicke theory
NASA Astrophysics Data System (ADS)
Bahrehbakhsh, Amir F.; Farhoudi, Mehrdad; Shojaie, Hossein
2011-03-01
We follow the approach of induced-matter theory for a five-dimensional (5 D) vacuum Brans-Dicke theory and introduce induced-matter and induced potential in four dimensional (4 D) hypersurfaces, and then employ a generalized FRW type solution. We confine ourselves to the scalar field and scale factors be functions of the cosmic time. This makes the induced potential, by its definition, vanishes, but the model is capable to expose variety of states for the universe. In general situations, in which the scale factor of the fifth dimension and scalar field are not constants, the 5 D equations, for any kind of geometry, admit a power-law relation between the scalar field and scale factor of the fifth dimension. Hence, the procedure exhibits that 5 D vacuum FRW-like equations are equivalent, in general, to the corresponding 4 D vacuum ones with the same spatial scale factor but a new scalar field and a new coupling constant, {tilde{?}} . We show that the 5 D vacuum FRW-like equations, or its equivalent 4 D vacuum ones, admit accelerated solutions. For a constant scalar field, the equations reduce to the usual FRW equations with a typical radiation dominated universe. For this situation, we obtain dynamics of scale factors of the ordinary and extra dimensions for any kind of geometry without any priori assumption among them. For non-constant scalar fields and spatially flat geometries, solutions are found to be in the form of power-law and exponential ones. We also employ the weak energy condition for the induced-matter, that gives two constraints with negative or positive pressures. All types of solutions fulfill the weak energy condition in different ranges. The power-law solutions with either negative or positive pressures admit both decelerating and accelerating ones. Some solutions accept a shrinking extra dimension. By considering non-ghost scalar fields and appealing the recent observational measurements, the solutions are more restricted. We illustrate that the accelerating power-law solutions, which satisfy the weak energy condition and have non-ghost scalar fields, are compatible with the recent observations in ranges -4/3 < ? ? -1.3151 for the coupling constant and 1.5208 ? n < 1.9583 for dependence of the fifth dimension scale factor with the usual scale factor. These ranges also fulfill the condition {tilde{?} > -3/2} which prevents ghost scalar fields in the equivalent 4 D vacuum Brans-Dicke equations. The results are presented in a few tables and figures.
Compilation of Henry's law constants (version 4.0) for water as solvent
NASA Astrophysics Data System (ADS)
Sander, R.
2015-04-01
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 17 350 values of Henry's law constants for 4632 species, collected from 689 references. It is also available at henrys-law.org"target="_blank">http://www.henrys-law.org.
Cormack, Lesley B.
2010-01-01
not attempt to offer a new or complete biography, however. Rather, it seeks to understand Henry?s life and death, not as objective ?fact,? but as a series of images and examples for those around him and those who came later. In many ways, Henry?s brief..., reviews 47 that Henry?s unfinished life has raised much interest and speculation since his death in 1612. Perhaps best known was Roy Strong?s 1986 biography, Henry, Prince of Wales, and England?s Lost Renaissance. This present volume does...
Huang, Jianwei
O:\\Seminar (SEM)\\2015\\IE Seminars\\sem1015_Dick Epema_DMC_040515.docx THE CHINESE UNIVERSITY OF HONG for Application Frameworks in Datacenters -- and other Research in the PDS Group in Delft by Professor Dick Epema Networks). Biography Dick H.J. Epema holds an MSc and a PhD in mathematics from Leiden University
Engineering quantum pure states of a trapped cold ion beyond the Lamb-Dicke limit L. F. Wei,1,2
Nori, Franco
Engineering quantum pure states of a trapped cold ion beyond the Lamb-Dicke limit L. F. Wei,1,2 Yu generate quantum pure states of a single trapped cold ion without performing the Lamb-Dicke approximation states. Unlike previous schemes operating in the Lamb-Dicke regime, the present one does well
Edinburgh, University of
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
Dark Energy From Fifth Dimensional Brans-Dicke Theory
Bahrehbakhsh, Amir F; Vakili, Hajar
2013-01-01
Following the approach of the induced-matter theory, we investigate the cosmological implications of a five-dimensional Brans-Dicke theory, and propose to explain the acceleration of the universe. After inducing in a four-dimensional hypersurface, we classify the energy-momentum tensor into two parts in a way that, one part represents all kind of the matter (the baryonic and dark) and the other one contains every extra terms emerging from the scale factor of the fifth dimension and the scalar field, which we consider as the energy-momentum tensor of dark energy. We also separate the energy-momentum conservation equation into two conservation equations, one for matter and the other for dark energy. We perform this procedure for different cases, without interacting term and with two particular (suitable) interacting terms between the two parts. By assuming the parameter of the state equation for dark energy to be constant, the equations of the model admit the power-law solutions. Though, the non-interacting cas...
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.
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.
Wormholes and Naked Singularities in Brans-Dicke cosmology
Tretyakova, D A; Alexeyev, S O
2015-01-01
We perform analytical and numerical study of static spherically symmetric solutions in the context of Brans-Dicke-like cosmological model by Elizalde et al.. In this model the phantom regime arises without the appearance of any ghost degree of freedom due to the specific form of coupling. For the certain parameter ranges the model contains a regular solution which we interpret as a wormhole. The space-time structure is similar to Schwarzschild-AdS one, representing a wormhole in AdS Universe. We put several bounds on the parameter values: $\\omega<0 ,\\,\\, \\alpha^2/|\\omega|<10^{-5},0<\\!\\phi_0\\!\\lesssim5.1\\,$. The numerical solution could mimic the Schwarzschild one, so the original model is consistent with astrophysical and cosmological observational data. However differences between our solution and the Schwarzschild one can be quite large, so black hole observations could probably place further limits on the $\\phi_0$ value. We also derive a power-law correction to the gravitational potential for the ...
Weinfurter, Harald
Experimental Entanglement of a Six-Photon Symmetric Dicke State Witlef Wieczorek,1,2,* Roland observation and characterization of a six-photon entangled Dicke state. We obtain a fidelity as high as 0:654 ? 0:024 and prove genuine six-photon entanglement by, amongst others, a two-setting witness yielding
THE WHOLESOMENESS OF' OYSTERS AS FOOD By Henry C. Rowe
THE WHOLESOMENESS OF' OYSTERS AS FOOD J1. By Henry C. Rowe President Connecticut Oyster Growers. ROWE, President Connecticut Oyster Growers' Association and New Yark and New England Oyster Shippersl away the results of the outlay of millions of dollars in experiments and planting. The natural enemies
Data Mining Social Media for Public Health Applications Henry Kautz
Kautz, Henry
be applied to study mental health dis- orders, such as depression, that have strong contagion pat- terns drive fundamental research on scalable machine learning and knowledge representation. Example tasksData Mining Social Media for Public Health Applications Henry Kautz University of Rochester
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
Les treillis de Galois Alpha Vronique Ventos* --Henry Soldano**,***
Soldano, Henry
Les treillis de Galois Alpha Véronique Ventos* -- Henry Soldano**,*** * LRI, UMR-CNRS 8623 utilisons ici est un treillis de Galois, c'est-à-dire un treillis correspondant au partitionnement des treillis de Galois. Pour cela nous utilisons une partition préliminaire des données correspon- dant à l
Patrick Henry Community College Staff Needs Assessment: Comprehensive Report.
ERIC Educational Resources Information Center
Needham, Roberta Lee
As part of a comprehensive community impact/needs assessment, Patrick Henry Community College (PHCC) conducted surveys of faculty, classified staff, and administrators. Questionnaires solicited information on respondent characteristics, PHCC's mission and goals, the purpose of postsecondary education, the adequacy of PHCC's services and programs,
Questions about algebraic properties of real numbers Henri Lombardi (
Lombardi, Henri
.r.t. {+, -, , >, } in a constructive setting (see [1, 12]). Why studying constructive real algebra? A first reason is that constructiveQuestions about algebraic properties of real numbers Henri Lombardi ( ) October 21, 2011 Abstract properties of real numbers, i.e., properties of real numbers w.r.t. {+, -, , >, } in a constructive setting
Portrait of a confederate secret agent: Henry A. Parr, DDS.
Hyson, J M; Swanson, B Z
1996-07-01
Dr. Henry Albert Parr wore many faces during his career beginning with his Civil War service as a Confederate secret service agent and ending as a presidential dentist. How he played the roles in between as a pirate, accused murderer, pharmacist, inventor, and dental educator is a real odyssey--and worthy of documentation. PMID:9459850
First day in Princeton The Joseph Henry Project
Petta, Jason
in Alexander Graham Bell's discovery of sound Bell Meets with Henry at the Smithsonian Institute Bell writes the Smithsonian Institution." "...and he sat at the table for a long time...wire against his ear Resistivity: 1.68E-8 Conductivity: 5.96E7 #12;Trip to The Smithsonian Institute #12;Visiting the Physics
Dynamic Knobs for Responsive Power-Aware Computing Henry Hoffmann
Polz, Martin
Massachusetts Institute of Technology {hank,stelios,mcarbin,misailo,agarwal,rinard}@csail.mit.edu ABSTRACT WeDynamic Knobs for Responsive Power-Aware Computing Henry Hoffmann Stelios Sidiroglou Michael Carbin Sasa Misailovic Anant Agarwal Martin Rinard Computer Science and Artificial Intelligence Laboratory
REDUNDANCY ELIMINATION IN MOTIF DISCOVERY HENRY LEUNG AND FRINCIS CHIN
Chin, Francis Y.L.
motif discovery algorithm MEME. 1 Introduction A gene is a segment of DNA that is the blueprint1 REDUNDANCY ELIMINATION IN MOTIF DISCOVERY ALGORITHMS HENRY LEUNG AND FRINCIS CHIN Department that a standard EM-based motif discovery algorithm enhanced with RME has a better performance than the popular
Agents for the User Interface Henry Lieberman and Ted Selker
Agents for the User Interface Henry Lieberman and Ted Selker Media Laboratory Massachusetts-seeking entities both compete and cooperate to produce intelligent behavior. Many of the other chapters you mean by "intelligent interface agent"? Terminology in the field is a problem, since researchers
Henri Chretien (1879-1956). Des etoiles au Cinemascope
NASA Astrophysics Data System (ADS)
Le Guet Tully, Francoise; Feldman, Renata; Tissot, Jean; Meije, Anne; Tissot, Herve; Simon, Isabelle; Augerot, Jean-Pierre; Fabre, Robert; Tricoire, Serge; Willemise, Ari
Henri Chretien a joue avec la lumiere tout au long de sa vie. Il l'a observee et decomposee, il l'a reflechie et refractee - de mille et une manieres - sur des miroires et des lentilles, inventant shaque fois un intrument, un appareil. Il a joue avec toutes le lumieres, celle de l'univers, celle du quotidien, et celle du reve.
Preparation of indium nitronates and their Henry reactions.
Soengas, Raquel G; Acrcio, Rita; Silva, Artur M S
2014-11-21
Indium nitronates were readily prepared from commercially available nitroalkanes by transmetallation of the corresponding lithium nitronates with indium salts. The Henry reaction of this indium organometallics with aldehydes afforded ?-nitroalkanols in moderate to high yields. The use of chiral sugar aldehydes furnished the corresponding carbohydrate-derived ?-nitroalkanols with excellent stereoselectivity. PMID:25260108
Diplomatic Metonymy and Antithesis in 3 Henry VI
Craigwood, J.
2014-06-19
superpowers of Europe, France and Spain.15 The state of the world is marveleossly changed, wrote Lord Burghley in 15 R. B. Wernham, The Making of Elizabethan Foreign Policy, 15581603 (Berkeley, 1980), 44, 71-82. DIPLOMATIC METONYMY AND ANTITHESIS IN 3 HENRY...
Pressure in a deep-water Stokes wave David Henry
with a constant speed and with a constant form over a body of water on a flat bed [2, 6, 17, 18]. For a deep-waterPressure in a deep-water Stokes wave David Henry School of Mathematical Sciences Dublin City description of the pressure distribution function for a deep-water Stokes wave. Keywords: Stokes wave, deep
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
Complex Image Recognition and Web Security Henry S. Baird1
Baird, Henry S.
Complex Image Recognition and Web Security Henry S. Baird1 Computer Science & Engineering technical issues studied by the image recognition research community are relevant to HIPs. This chapter, highlights of the first two HIP workshops, and proposals for an image recognition research agenda to advance
Cline, Henry (1750-1827) Surgeon. Trained by
. Sources: ODNB, King's College Archives Image: UCL Art image A85-733 Sculptor: F. Chantrey, date unknown image A85-727 Sculptor: Annable Dutrieux, 1856 Bell, Charles (1774-1842) Physician and surgeon. In 1827-1836. Sources: ODNB Image: UCL Art image A85-731 Sculptor: Henry Weekes, 1856 Erichsen, John Eric (1818
Bending of a Stented Atherosclerotic Artery Henry C. Wong*,1
Tang, William C
Bending of a Stented Atherosclerotic Artery Henry C. Wong*,1 , Kevin N. Cho and William C. Tang2 1 angioplasty procedure, stents can be inserted and expanded in the atherosclerotic artery. The current stent segmented stent design for use in this class of arteries. In our study, we used COMSOL Multiphysics
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
Principles in Action: The Work of Henri Wallon
ERIC Educational Resources Information Center
Voyat, Gilbert
1974-01-01
An examination of the life and philosophy of Henri Wallon, A French psychiatrist, psychologist, and educator, focusing on his views regarding the role of imitation in adaptation and learning, emotional development, syncretic thought, his differences with Piaget, and an assessment of the impact of his work. (EH)
La Vie et L'oeuvre d'Henri Wallon.
ERIC Educational Resources Information Center
Aubrey, Carol
1987-01-01
Outlines the life and philosophy of noted French child psychologist, Henri Wallon (1879-1962). Reviews the philosophical origins of the Wallonian Approach including the theory of emotions, the development of representational thought, the role of imitation in the formation of representation, and the role of language in the development of thought
Henry Kuo, Ingrid Verbauwhede Annual Research Review 2000 1
Verbauwhede, Ingrid
and Java for 8-bits (Intel 8051) and 32-bits (Intel P200) processors Mobile phone or smart card need low Verbauwhede 2 Data encryption in wireless communication, PDA's, Internet is very important Co-processors with high encryption power, small area, and low power consumption Introduction #12;Henry Kuo, Ingrid
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.
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.
L-Functions of Hypergeometric Motives Henri Cohen
Cohen, Henri
1 L-Functions of Hypergeometric Motives Henri Cohen Institut de Mathmatiques de Bordeaux July 18), (generalized) hypergeometric function : F(, ; t) = m0 1jr (j)m 1jr (j)m tm (classical case r = 1, so (r )m = m, 2011, Oberwolfach #12;2 Hypergeometry I Joint with Fernando Rodriguez-Villegas. Hypergeometric data
THE LOCAL INTERSTELLAR ULTRAVIOLET RADIATION FIELD Richard Conn Henry1
THE LOCAL INTERSTELLAR ULTRAVIOLET RADIATION FIELD Richard Conn Henry1 Center for Astrophysical interstellar ultraviolet radiation field, under various assumptions concerning the albedo a of the interstellar grains. (This ultraviolet radiation field is of particular interest because of the fact that ultraviolet
SPECIAL EDITION, 19362 d. SIR HENRY WELLCOME, 18531936
Rambaut, Andrew
: to own the company's share capi- tal and to invest the dividends in medi- cal and historical researches Price, and two eminent medical scientists, Sir Henry Hallett Dale and Professor Thomas Renton Elliott-winning scientist speaks CLOSE RELATIONSHIP WITH WELLCOME One of the five trustees of the new Wellcome Trust, Sir
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
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
Mardi 30 avril 2013 Institut Henri Poincare (IHP), Paris.
Waldschmidt, Michel
Mardi 30 avril 2013 Institut Henri Poincar´e (IHP), Paris. Association Science Ouverte. Conjecture Suivant F. Beukers, un bon triplet abc est un triplet abc tel que Rad(abc) science.uu.nl/beuke106/ABCpresentation.pdf Exemple: (1, 8, 9) est un bon triplet abc car 1 + 8 = 9, pgcd(1, 8, 9) = 1 et
30.-DEEP-WATER OYSTER CULTURE. BP HENRY C. ROWE.
30.-DEEP-WATER OYSTER CULTURE. BP HENRY C. ROWE. It is conceded,I think, that the oyster-growersof Ckmnecticut have taken the lead in the artificial propagation and cultivation of oysters in deep water; by deep water I mean a depth of from 30 to 75 feet. It is but twenty years since the commencement
USING THE STATIC HEADSPACE METHOD TO DETERMINE HENRY'S LAW CONSTANTS
A new, accurate, and experimentally simple method has been developed to determine dimensionless Henry's law constants using the static headspace method. he method appears applicable to a wide range of volatile and semivolatile organic compounds. he method work well even for methy...
DETERMINATION OF HENRY'S LAW CONSTANTS OF SELECTED PRIORITY POLLUTANTS
The Henry's law constants (H) for 41 selected priority pollutants were determined to characterize these pollutants and provide information on their fate as they pass through wastewater treatment systems. All experimental values presented for H are averages of two or more replicat...
Database Research Faces the Information Explosion Henry F. Korth
Silberschatz, Avi
Database Research Faces the Information Explosion Henry F. Korth Abraham Silberschatz Bell of the \\information explosion." This term, though imprecise, refers not only to the increase in the amount dissemination. This information explosion is often credited in large part to the combination of 1. low
The explosion problem in a flow Henri Berestycki
Novikov, Alexei
The explosion problem in a flow Henri Berestycki Alexander Kiselev Alexei Novikov Lenya Ryzhik March 19, 2008 Abstract We consider the explosion problem in an incompressible flow introduced in [5]. We use a novel Lp - L estimate for elliptic advection-diffusion problems to show that the explosion
Jean-Henri Fabre: his life, his work
NSDL National Science Digital Library
0000-00-00
This web site provides an extensive "electronic museum" devoted to the life and works of 19th-century entomologist Jean-Henri Fabre, with examples of his written entomological works, his correspondence (with Darwin and others), and historical context. Listings of his translated works in 15 languages is available, as is a gallery of historical photographs.
Neural NetworkBased Face Detection Henry A. Rowley
Neural NetworkBased Face Detection Henry A. Rowley May 1999 CMUCS99117 School of Computer expressed or implied, of the sponsors or the U.S. government. #12; Keywords: Face detection, Pattern or absence of an object is useful. Detection of faces, in particular, is a critical part of face recognition
DISCUSSING EURO VOLATILITY Jrme Creel and Henri Sterdyniak
Paris-Sud XI, Universit de
1 DISCUSSING EURO VOLATILITY Jrme Creel and Henri Sterdyniak (OFCE et CREFED, Universit de Paris2014 #12;3 This paper deals with Euro introduction and ask whether it is likely to increase effect), but results are ambiguous in the specific case of the Euro. An increase in volatility would only
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
EIGENBUNDLES, QUATERNIONS, AND BERRY'S PHASE Daniel Henry Gottlieb
, Cli#ord Algebras, Doppler shift. Typeset by A M ST E X 1 #12; 2 DANIEL HENRY GOTTLIEB projections)] The generalization of quater nions, called Cli#ord Algebras, has also been extensively studied by physicists
A tribute to Henry Arthur Osmaston (19222006) BRYAN G. MARK*
Howat, Ian M.
and reconfigure our understanding of glacial geology, geography, ecology and earth sciences. This special issue in the Royal Electrical and Mechanical Engineers, Henry served the duration of the war in the Middle East. He are recorded by Anna in her book Uganda Before Amin (Osmaston A., 1991) and depict a happy time for them all
SURFING BRACHISTOCHRONES Bruce Henry and Simon Watt 1
Henry, Bruce Ian
SURFING BRACHISTOCHRONES by Bruce Henry and Simon Watt 1 One of the most famous problems examine two surfing manoeuvres involving brachistochrones. The first calculation presented shows tical mechanics of fractal pattern formation. Here they take time out to go surfing. 2 Excellent sources
Modified Brans-Dicke theory with space-time anisotropic parameters
Moon, Taeyoon [Center for Quantum Space-time, Sogang University, Seoul, 121-742 (Korea, Republic of); Oh, Phillial, E-mail: tymoon@inje.ac.kr, E-mail: ploh@skku.edu [Department of Physics and Institute of Basic Science, Sungkyunkwan University Suwon, 440-746 (Korea, Republic of)
2014-03-01
We consider the ADM formalism of the Brans-Dicke theory and propose a space-time anisotropic extension of the theory by introducing five free parameters. We find that the resulting theory reveals many interesting aspects which are not present in the original BD theory. We first discuss the ghost instability and strong coupling problems which are present in the gravity theory without the full diffeomorphism symmetry and show that they can be avoided in a region of the parameter space. We also perform the post-Newtonian approximation and show that the constraint of the Brans-Dicke parameter ?{sub BD} being large to be consistent with the solar system observations could be evaded in the extended theory. We also discuss that accelerating Universe can be achieved without the need of the potential for the Brans-Dicke scalar.
Modified Brans-Dicke gravitational theory with nonzero divergence of the energy-momentum tensor
NASA Technical Reports Server (NTRS)
Smalley, L. L.
1974-01-01
The Brans-Dicke theory of gravitation is modified by assuming that the divergence of the energy-momentum tensor is proportional to the covariant derivative of the scalar curvature. No ad hoc additions to the usual Brans-Dicke field equations are required as in Rastall's modification of the Einstein theory or as in the steady-state theories, of which this is a natural possibility. Three parameters emerge from the theory - namely, the unnormalized gravitational constant, the usual Brans-Dicke parameter, and the proportionality constant. In the post-Newtonian approximation, these parameters can be fixed by experiment. However, there exists a certain choice of the parameters for which the theory reduces to an Einstein theory with constant scalar curvature.
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
Five dimensional spherically symmetric cosmological model in Brans-Dicke theory of gravitation
NASA Astrophysics Data System (ADS)
Rao, V. U. M.; Jaysudha, V.
2015-08-01
In this paper, we consider the spherically symmetric space-time in five dimensions in Brans-Dicke (Phys. Rev. 124:925, 1961) theory of gravitation in the presence of perfect fluid distribution. A determinate solution of the highly non-linear field equations is presented using (i) relation between metric potentials and (ii) an equation of state which represents disordered radiation in five dimensional universe. The solution obtained describes five dimensional radiating model in Brans-Dicke theory. Some physical and kinematical properties of the model are also discussed.
Jiang, Bei; Zhou, Zunchun; Dong, Ying; Tao, Wei; Wang, Bai; Jiang, Jingwei; Guan, Xiaoyan
2015-07-01
A bacterium designated strain JB, able to degrade six benzene, toluene, ethylbenzene, and o-, m-, and p-xylene (BTEX) compounds, was isolated from petroleum-contaminated soil. Taxonomic analyses showed that the isolate belonged to Comamonas, and until now, the genus Comamonas has not included any known BTEX degraders. The BTEX biodegradation rate was slightly low on the mineral salt medium (MSM), but adding a small amount of yeast extract greatly enhanced the biodegradation. The relationship between specific degradation rate and individual BTEX was described well by Michaelis-Menten kinetics. The treatment of petrochemical wastewater containing BTEX mixture and phenol was shown to be highly efficient by BTEX-grown JB. In addition, toxicity assessment indicated the treatment of the petrochemical wastewater by BTEX-grown JB led to less toxicity than untreated wastewater. PMID:26018344
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...
Rao, Satish
John Henry was a steel-drivin man... John Henry worked on the railroad, he drove steel of men to build. One day, a man brought a steam engine to the tunnel and said it could drive steel better their living pounding steel into stone. For me, this story is about someone who did what he did with passion
The SPARC vapor pressure and activity coefficient models were coupled to estimate Henrys 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
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...
Exact metric for the exterior of a global string in the Brans-Dicke theory
B. Boisseau; B. Linet
1998-02-03
We determine in closed form the general static solution with cylindrical symmetry to the Brans-Dicke equations for an energy-momentum tensor corresponding to the one of the straight U(1) global string outside the core radius assuming that the Goldstone boson field takes its asymptotic value
Generation of Dicke Squeezed State in Kerr-Down Conversion System
NASA Astrophysics Data System (ADS)
Li, Song-Song
2015-10-01
We investigate the squeezing dynamics of the Kerr-down conversion system under a certain condition with Dicke squeezing parameter. By numerically calculating the squeezing parameter, we show that the squeezing is independent of the frequencies of the first and second mode; the stronger coupling induces stronger squeezing and longer time interval of squeezing.
GP and Bloat: Absorbing boundaries and spatial P.A. Whigham & G. Dick
Fernandez, Thomas
GP and Bloat: Absorbing boundaries and spatial structures P.A. Whigham & G. Dick Spatial drift is examined and the results showing the influence of a lower absorbing boundary are examined). This work implied that the presence of an absorbing boundary (a genome size that once reached cannot change
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
Nonequilibrium thermodynamics--A tool to describe heterogeneous Dick Bedeaux,bc
Kjelstrup, Signe
Nonequilibrium thermodynamics--A tool to describe heterogeneous catalysis Dick Bedeaux,bc Signe a catalytic surface is assumed to be localized in a diffusion layer in front of the surface. At the surface are questionable. Using nonequilibrium thermodynamics we discuss how to integrate the coupling between heat
On the limits of Brans-Dicke spacetimes a coordinate-free approach
Paiva, F M
1993-01-01
We investigate the limit of Brans-Dicke spacetimes as the scalar field coupling constant omega tends to infinity applying a coordinate-free technique. We obtain the limits of some known exact solutions. It is shown that these limits may not correspond to similar solutions in the general relativity theory.
Isotropization of Bianchi type models and a new FRW solution in Brans-Dicke theory
Jorge L. Cervantes-Cota; Marcos Nahmad
2000-05-10
Using scaled variables we are able to integrate an equation valid for isotropic and anisotropic Bianchi type I, V, IX models in Brans-Dicke (BD) theory. We analyze known and new solutions for these models in relation with the possibility that anisotropic models asymptotically isotropize, and/or possess inflationary properties. In particular, a new solution of curve ($k\
Experimental Quantum Networking Protocols via Four-Qubit Hyperentangled Dicke States A. Chiuri,1
Roma "La Sapienza", Universit di
Experimental Quantum Networking Protocols via Four-Qubit Hyperentangled Dicke States A. Chiuri,1 C October 2012) We report the experimental demonstration of two quantum networking protocols, namely quantum.67.Bg, 42.50.Ex Networking offers the benefits of connectivity and shar- ing, often allowing for tasks
Self-Similar Collapse in Brans-Dicke Theory and Critical Behavior
H. P. de Oliveira
1996-05-03
We use the technique of conformal transformations to generate self-similar collapse in Brans-Dicke theory. We analyze the solutions concerning the critical behavior found recently by Choptuik. The critical exponent associated to the formation of black hole for near critical evolution is obtained. The role of the coupling parameter is discussed.
2Fast : Collaborative downloads in P2P networks Pawel Garbacki, Alexandru Iosup, and Dick Epema
van Steen, Maarten
2Fast : Collaborative downloads in P2P networks Pawel Garbacki, Alexandru Iosup, and Dick Epema in bandwidth sharing have been designed, usually by limit- ing the download bandwidth to the available upload of peers that collaborate in downloading a file on behalf of a single group member, which can thus use its
Can hyperbolic phase of Brans-Dicke field account for Dark Matter?
Arik, M; Cifter, F
2008-01-01
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.
Quantum phase transitions and spontaneous symmetry-breaking in Dicke model
Puebla, R.; Retamosa, J. [Grupo de Fisica Nuclear, Departamento de Fisica Atomica, Molecular y Nuclear, Universidad Complutense de Madrid, Av. Complutense s/n, 28040 Madrid (Spain); Relano, A. [Departamento de Fisica Aplicada I and GISC, Universidad Complutense de Madrid, Av, Complutense s/n, 28040 Madrid (Spain)
2013-06-10
A method to find the Excited-States Quantum Phase Transitions (ESQPT's) from paritysymmetry in the Dicke model is studied and presented. This method allows us to stablish a critical energy where ESQPT's take places, and divides the whole energy spectrum in two regions with different properties.
Free Boundary TRANSP Upgrade Dick Wieland John Schivell Doug McCune
Budny, Robert
Free Boundary TRANSP Upgrade Dick Wieland John Schivell Doug Mc.1 Overview The free boundary equilibrium TRANSP upgrade (code name BRAZIL) is pro- ceeding in two stages, as described in more detail below. In the first stage, code name BRAZIL-0, the results of a standalone free
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
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
Possible observational manifestations of wormholes in the Brans-Dicke theory
Alexeyev, S. O. Rannu, K. A.; Gareeva, D. V.
2011-10-15
The energy flux emitted during the accretion of matter onto a wormhole in the Brans-Dicke theory has been calculated. This characteristic is compared with its values calculated previously for wormholes in general relativity and for a Schwarzschild black hole.
Dicke quantum phase transition with a superfluid gas in an optical cavity.
Baumann, Kristian; Guerlin, Christine; Brennecke, Ferdinand; Esslinger, Tilman
2010-04-29
A phase transition describes the sudden change of state of a physical system, such as melting or freezing. Quantum gases provide the opportunity to establish a direct link between experiments and generic models that capture the underlying physics. The Dicke model describes a collective matter-light interaction and has been predicted to show an intriguing quantum phase transition. Here we realize the Dicke quantum phase transition in an open system formed by a Bose-Einstein condensate coupled to an optical cavity, and observe the emergence of a self-organized supersolid phase. The phase transition is driven by infinitely long-range interactions between the condensed atoms, induced by two-photon processes involving the cavity mode and a pump field. We show that the phase transition is described by the Dicke Hamiltonian, including counter-rotating coupling terms, and that the supersolid phase is associated with a spontaneously broken spatial symmetry. The boundary of the phase transition is mapped out in quantitative agreement with the Dicke model. Our results should facilitate studies of quantum gases with long-range interactions and provide access to novel quantum phases. PMID:20428162
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.
Sarcophilia, cremation and Sir Henry Thompson (1820-1904).
Jellinek, E H
2009-11-01
Sarcophilia, a neologism for an attachment to human remains, is set in a review of the history of the disposal of the dead. The ancient practice of cremation was relaunched late in the 19th century by the urological surgeon cum social reformer Sir Henry Thompson. He was stimulated by Edwin Chadwick and Charles Dickens, and by Charles Darwin's observations on the earthworm. Sarcophilia is the reason for the controversial Human Tissue Act of 2004. PMID:20029076
Determination of Henry's law constants of selected priority pollutants
Warner, H.P.; Cohen, J.M.; Ireland, J.C.
1987-07-01
The Henry's law constants (H) for 41 selected priority pollutants were determined to characterize these pollutants and provide information on their fate as they pass through wastewater treatment systems. All experimental values presented for H are averages of two or more replicates. Calculated values are based on data from many published sources. Many calculated results correspond closely to the experimental values, several deviate significantly, and no values could be calculated for some compounds due to insufficient data.
Twilight of the gods: John Henry Mackay's Der Unschuldige.
Kennedy, H
1993-01-01
The writings of the Scotch-German John Henry Mackay are important for the early cultural history of the modern gay movement. This article recalls this unjustly neglected anarchist writer and advocate of man/boy love by tracing his biography and pointing out his contacts with others in the movement. His late novella Der Unschuldige is analyzed to show that Mackay has encoded homosexuality there in a unique and individual way. PMID:8113599
Temperature dependencies of Henry's law constants for different plant sesquiterpenes.
Copolovici, Lucian; Niinemets, lo
2015-11-01
Sesquiterpenes are plant-produced hydrocarbons with important ecological functions in plant-to-plant and plant-to-insect communication, but due to their high reactivity they can also play a significant role in atmospheric chemistry. So far, there is little information of gas/liquid phase partition coefficients (Henry's law constants) and their temperature dependencies for sesquiterpenes, but this information is needed for quantitative simulation of the release of sesquiterpenes from plants and modeling atmospheric reactions in different phases. In this study, we estimated Henry's law constants (Hpc) and their temperature responses for 12 key plant sesquiterpenes with varying structure (aliphatic, mono-, bi- and tricyclic sesquiterpenes). At 25C, Henry's law constants varied 1.4-fold among different sesquiterpenes, and the values were within the range previously observed for monocyclic monoterpenes. Hpc of sesquiterpenes exhibited a high rate of increase, on average ca. 1.5-fold with a 10C increase in temperature (Q10). The values of Q10 varied 1.2-fold among different sesquiterpenes. Overall, these data demonstrate moderately high variation in Hpc values and Hpc temperature responses among different sesquiterpenes. We argue that these variations can importantly alter the emission kinetics of sesquiterpenes from plants. PMID:26291755
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.
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
ERIC Educational Resources Information Center
Glover, Jim
2006-01-01
Henry David Thoreau has gotten a bad rap lately. He's been pigeon-holed as a "romantic" by resource managers who do not have a tiny fragment of his wisdom and don't know anything about him. He's been accused of hypocrisy because his cabin at Walden Pond was not, after all, very remote. His wilderness trips, in this age of fly-in mountaineering,
LINEARLY CONSTRAINED LQ AND LQG OPTIMAL CONTROL A.E.B. LIM, J.B. MOOREand L. FAYBUSOVICH
Moore, John Barratt
LINEARLY CONSTRAINED LQ AND LQG OPTIMAL CONTROL A.E.B. LIM, J.B. MOOREand L. FAYBUSOVICH Department the linearly constrainedLQ control problemis now available. In this paper, we solve the linearly constrained; linear constraints; interior-point methods; logarithmic barrier method; LQG control; Separation Theorem
Allen, Richard M.
synthetic aperture radar imagery. Journal of Geophysical Research, 110, B09406, doi:10.1029/2004JB003338. Hanks, T. C., and Kanamori, H., 1979. A moment magnitude scale. Journal of Geophysical Research model for aseismic crustal deformation at Hollister, California. Journal of Geophysical Research, 91
Madeleine, Jean-Baptiste
June 2009 Keywords: Mars Atmosphere Dynamics Climate Geological processes a b s t r a c t Recent for sublimation. We find that high dust contents of the atmosphere increase its water vapor holding capacityAmazonian northern mid-latitude glaciation on Mars: A proposed climate scenario J.-B. Madeleine a
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...
The SPARC (SPARC Performs Automated Reasoning in Chemistry) physicochemical mechanistic models for neutral compounds have been extended to estimate Henrys Law Constant (HLC) for charged species by incorporating ionic electrostatic interaction models. Combinations of absolute aq...
Federal Register 2010, 2011, 2012, 2013, 2014
2013-06-07
...Railroad Company--Abandonment Exemption--in Cass, Henry, Johnson, and Pettis Counties, MO; Central Midland Railway Company--Discontinuance of Service Exemption--in Cass, Henry, Johnson, and Pettis Counties, MO Missouri Central Railroad...
Federal Register 2010, 2011, 2012, 2013, 2014
2011-08-12
...Impact Statement for the Henrys Fork Salinity Control Project Plan, Sweetwater and...Statement (EIS) for the Henrys Fork Salinity Control Project Plan (SCPP). The NRCS...Improvements'' alternative assumes a salinity control project will be...
Harrison, Mark A J; Cape, J Neil; Heal, Mathew R
2002-01-01
The Henrys Law coefficient is a key physical parameter in the partitioning, and hence environmental fate, of a chemical species between air and water. Despite the acknowledged polluting potential of phenol, 2-methylphenol ...
Rasmont, Pierre
Rasmont P. 2003. Jean-Henry Fabre pourrait-il observer aujourd'hui tous ces insectes ? pp. 209-220 in Jean-Henri Fabre, un autre regard sur l'insecte. Actes du colloque International sur l'Entomologie, 18. Jean-Henri Fabre pourrait-il observer aujourd'hui tous ces insectes? P. Rasmont*, Y. Barbier*, S
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...
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 Henrys Law Constant (HLC) in water and in hexadecane for a wide range of non-polar and polar organic compounds without modification or additional p...
BARNACLES OF JAPAN AND BERING SEA By Henry A. Pilsbry, Sc. D.
BARNACLES OF JAPAN AND BERING SEA .:1- By Henry A. Pilsbry, Sc. D. Curator Department of ., 1909. ~J ,.,' " .~,.,-' 3 P L AT E VIII. #12;BARNACLES OF JAPAN AND BERING SEA. ,;I. By HENRY occupied are described in Bureau of Fisheries Document No. 621. Little has been published on the barnacles
Henry's law, surface tension, and surface adsorption in dilute binary mixtures
Henry's law, surface tension, and surface adsorption in dilute binary mixtures Akira Onukia. The solute partitioning between gas and liquid Henry's law and the surface tension change are discussed fraction X and the temperature-derivative / T cx,p of the surface tension at fixed pressure p
Review of "Poincare and the Three Body Problem" by June Barrow-Green Daniel Henry Gottlieb
Review of "Poincar´e and the Three Body Problem" by June Barrow-Green Daniel Henry Gottlieb the attention of the mathematical world. And the winner was ... Henri Poincar´e ... with a manuscript that had a major error! The paper was due to be published on the King's birthday a few weeks hence, when Poincar´e
46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.
Code of Federal Regulations, 2011 CFR
2011-10-01
...2011-10-01 2011-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD...BOUNDARY LINES Atlantic Coast 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light 2...
46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.
Code of Federal Regulations, 2013 CFR
2013-10-01
...2013-10-01 2013-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD...BOUNDARY LINES Atlantic Coast 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light 2...
46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.
Code of Federal Regulations, 2014 CFR
2014-10-01
...2014-10-01 2014-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD...BOUNDARY LINES Atlantic Coast 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light 2...
46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.
Code of Federal Regulations, 2012 CFR
2012-10-01
...2012-10-01 2012-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD...BOUNDARY LINES Atlantic Coast 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light 2...
A Henry's Law Test for Experimental Partitioning Studies of Iron Meteorites
NASA Technical Reports Server (NTRS)
Chabot, N. L.; Campbell, A. J.; Humayun, M.; Agee, C. B.
2001-01-01
Low-level doped solid metal/liquid metal experiments analyzed by laser ablation ICP-MS allow Henry's Law to be tested. The results indicate Henry's Law is obeyed and the experimental partition coefficients can be applied to iron meteorites. Additional information is contained in the original extended abstract.
46 CFR 7.55 - Cape Henry, VA to Cape Fear, NC.
Code of Federal Regulations, 2010 CFR
2010-10-01
...2010-10-01 2010-10-01 false Cape Henry, VA to Cape Fear, NC. 7.55 Section 7.55 Shipping COAST GUARD...BOUNDARY LINES Atlantic Coast 7.55 Cape Henry, VA to Cape Fear, NC. (a) A line drawn from Rudee Inlet Jetty Light 2...
Lee, Shan-Hu
A Laboratory Experiment To Measure Henry's Law Constants of Volatile Organic Compounds experiment is described to measure Henry's law constants of organic compounds using a bubble column and gas/Manipulatives, Atmospheric Chemistry, Equilibrium, Thermodynamics Henry's law constant represents the solubility of a solute
Kevin Stoker; James Arrington
2010-01-01
Henry Wallace founded Wallace's Farmer in 1895 and transformed farm journalism. Much has been written about Wallace, his son Henry C., and his grandson Henry A., Vice President under President Franklin D. Roosevelt, but little has been said about his best work of journalism, Our Weekly Sabbath School Lesson. A study of lessons from 1899 to 1915 revealed that the
Ruby, Edward G.
.1128/JB.01547-08 Copyright 2009, American Society for Microbiology. All Rights Reserved. Mutations. Stabb1 * Department of Microbiology, University of Georgia, Athens, Georgia 306051 ; Department of Molecular Microbiology, Washington University, St. Louis, Missouri 631102 ; Department of Microbiology
de Boer, Rob J.
2002-01-01
Beltman JB, Borghans JAM & de Boer RJ (2002). Major Histocompatibility Complex: Polymorphism from Institute for Applied Systems Analysis 15 Major Histocompatibility Complex: Polymorphism from Coevolution adaptation of hosts to pathogens is the polymorphism of major histocompatibility complex (MHC) molecules
.1128/JB.00827-07 Copyright 2007, American Society for Microbiology. All Rights Reserved. Salicylic Acid and Arabidopsis thaliana hosts, was used to investigate the role of salicylic acid (SA) and iron acquisition via
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.
Hugh Henry Bentall, a pioneer of cardiovascular surgery.
Thiene, Gaetano
2014-04-01
Hugh Henry Bentall, the inventor of the surgical procedure that enabled concomitant replacement of the aortic valve and ascending aorta, died on September 2012 at the age of 92. He was the first Professor of Cardiothoracic Surgery in the United Kingdom, at the Hammersmith Hospital, and carried out the first open-heart operations with a heart-lung machine in London in 1953. Besides cardiac surgery, he paid particular attention to cardiac anatomy and embryology, which he enriched even following retirement. He leaves three sons and a daughter. PMID:24368549
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.
Integrability versus exact solvability in the quantum Rabi and Dicke models
NASA Astrophysics Data System (ADS)
Batchelor, Murray T.; Zhou, Huan-Qiang
2015-05-01
The Rabi model describes the simplest interaction between light and matter via a two-level quantum system interacting with a bosonic field. We demonstrate that the fully quantized version of the Rabi model is integrable in the Yang-Baxter sense at two parameter values. The model is argued to be not Yang-Baxter integrable in general. This is in contrast to the claim that the quantum Rabi model is integrable based on a phenomenological criterion of quantum integrability not presupposing the existence of a set of commuting operators. Similar Yang-Baxter integrable points are identified for the generalized Rabi model and the fully quantized Dicke model. The integrable points have particular implications for the level statistics of the Dicke model.
Hamiltonian formulation of Palatini f(R) theories a la Brans-Dicke theory
Olmo, Gonzalo J.; Sanchis-Alepuz, Helios
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.
Chameleon effect in the Jordan frame of the Brans-Dicke theory
NASA Astrophysics Data System (ADS)
Quiros, Israel; Garca-Salcedo, Ricardo; Gonzalez, Tame; Horta-Rangel, F. Antonio
2015-08-01
In this paper we investigate the chameleon effect in the different conformal frames of the Brans-Dicke (BD) theory. Given that, in the standard literature on the subject, the chameleon is described in the Einstein frame almost exclusively, here we pay special attention to the description of this effect in the Jordan and in the string frames. It is shown that, in general, terrestrial and solar system bounds on the mass of the BD scalar field, and bounds of cosmological origin, are difficult to reconcile at once through a single chameleon potential. We point out that, in a cosmological context, provided that the effective chameleon potential has a minimum within a region of constant density of matter, the Brans-Dicke theory transmutes into general relativity with a cosmological constant, in that region. This result, however, can be only locally valid.
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.
Enhancement of thermoelectric efficiency in triple quantum dots by the Dicke effect
NASA Astrophysics Data System (ADS)
Wang, Qiang; Xie, Haiqing; Nie, Yi-Hang; Ren, Wei
2013-02-01
We theoretically study thermoelectric transport through a quantum dot coupled to two side quantum dots in the linear response regime by the nonequilibrium Green's function technique. Our results show that thermoelectric properties are strongly influenced by the Dicke effect. At low temperature, for small (very large) level shift and large interdot coupling the subradiant state contributes a sharp peak to the Dicke spectral line in the electrical and thermal conductance spectrum and leads to a strong violation of the Wiedemann-Franz law. As a result, the thermoelectric efficiency is strongly enhanced near the subradiant state. At relatively high temperature, the large tunneling coupling may be used to compensate the attenuation of the interference effect so that a considerable thermoelectric efficiency can still be obtained around the subradiant state. Moreover, the thermoelectric efficiency is also strongly dependent on the asymmetry parameter and intradot Coulomb interaction.
Holographic Dark Energy in Brans-Dicke Cosmology with Granda-Oliveros Cut-off
NASA Astrophysics Data System (ADS)
Jamil, Mubasher; Karami, K.; Sheykhi, A.; Kazemi, E.; Azarmi, Z.
2012-02-01
Motivated by the recent works of one of us (Karami and Fehri, Int. J. Theor. Phys. 49:1118, 2010; Phys. Lett. B 684:61, 2010), 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 <-1 for the equation of state of 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.
Mark A. Scheel; Stuart L. Shapiro; Saul A. Teukolsky
1994-11-10
We present a new numerical code that evolves a spherically symmetric configuration of collisionless matter in the Brans-Dicke theory of gravitation. In this theory the spacetime is dynamical even in spherical symmetry, where it can contain gravitational radiation. Our code is capable of accurately tracking collapse to a black hole in a dynamical spacetime arbitrarily far into the future, without encountering either coordinate pathologies or spacetime singularities. This is accomplished by truncating the spacetime at a spherical surface inside the apparent horizon, and subsequently solving the evolution and constraint equations only in the exterior region. We use our code to address a number of long-standing theoretical questions about collapse to black holes in Brans-Dicke theory.
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.
NASA Astrophysics Data System (ADS)
Dias, scar J. C.; Lemos, Jos P. S.
2001-09-01
We obtain static and rotating electrically charged black holes of a Einstein-Maxwell-dilaton theory of the Brans-Dicke type in 2+1 dimensions. The theory is specified by three fields, the dilaton ?, the graviton g?? and the electromagnetic field F??, and two parameters, the cosmological constant ? and the Brans-Dicke parameter ?. It contains eight different cases, of which one distinguishes as special cases string theory, general relativity and a theory equivalent to four dimensional general relativity with one Killing vector. We find the Arnowitt-Derer-Misner mass, angular momentum, electric charge and dilaton charge and compute the Hawking temperature of the solutions. Causal structure and geodesic motion of null and timelike particles in the black hole geometries are studied in detail.
Higher Dimensional Szekeres' Space-time in Brans-Dicke Scalar Tensor Theory
Asit Banerjee; Ujjal Debnath; Subenoy Chakraborty
2004-04-21
The generalized Szekeres family of solution for quasi-spherical space-time of higher dimensions are obtained in the scalar tensor theory of gravitation. Brans-Dicke field equations expressed in Dicke's revised units are exhaustively solved for all the subfamilies of the said family. A particular group of solutions may also be interpreted as due to the presence of the so-called C-field of Hoyle and Narlikar and for a chosen sign of the coupling parameter. The models show either expansion from a big bang type of singularity or a collapse with the turning point at a lower bound. There is one particular case which starts from the big bang, reaches a maximum and collapses with the in course of time to a crunch.
Delocalized single-photon Dicke states and the Leggett-Garg inequality in solid state systems
Chen, Guang-Yin; Lambert, Neill; Li, Che-Ming; Chen, Yueh-Nan; Nori, Franco
2012-01-01
We show how to realize a single-photon Dicke state in a large one-dimensional array of two-level systems, and discuss how to test its quantum properties. The realization of single-photon Dicke states relies on the cooperative nature of the interaction between a field reservoir and an array of two-level-emitters. The resulting dynamics of the delocalized state can display Rabi-like oscillations when the number of two-level emitters exceeds several hundred. In this case, the large array of emitters is essentially behaving like a mirror-less cavity. We outline how this might be realized using a multiple-quantum-well structure or a dc-SQUID array coupled to a transmission line, and discuss how the quantum nature of these oscillations could be tested with an extension of the Leggett-Garg inequality. PMID:23162693
Collapse to Black Holes in Brans-Dicke Theory: II. Comparison with General Relativity
Mark A. Scheel; Stuart L. Shapiro; Saul A. Teukolsky
1994-11-10
We discuss a number of long-standing theoretical questions about collapse to black holes in the Brans-Dicke theory of gravitation. Using a new numerical code, we show that Oppenheimer-Snyder collapse in this theory produces black holes that are identical to those of general relativity in final equilibrium, but are quite different from those of general relativity during dynamical evolution. We find that there are epochs during which the apparent horizon of such a black hole passes {\\it outside\\/} the event horizon, and that the surface area of the event horizon {\\it decreases\\/} with time. This behavior is possible because theorems which prove otherwise assume $R_{ab}l^al^b \\ge 0$ for all null vectors $l^a$. We show that dynamical spacetimes in Brans-Dicke theory can violate this inequality, even in vacuum, for any value of $\\omega$.
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.
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
Robust creation of arbitrary-sized Dicke states using a single laser pulse
I. E. Linington; N. V. Vitanov
2008-05-22
We propose a novel technique for the creation of maximally entangled symmetric Dicke states in an ion trap using adiabatic passage, which requires only a pair of chirped pulses from a single laser and is applicable to any number of ions and excitations. By utilising a particular factorisation of the Hilbert space for multi-level ladders we show that the problem can be reduced to `bow-tie' configuration energy-level crossings. This technique is naturally robust against fluctuations in the laser intensity and the chirp rate. Even when realistic heating rates are considered, we estimate that the overall fidelity should remain high (e.g. 98% for a ten-ion Dicke state), which represents a significant improvement over traditional approaches.
2012-01-01
Background Sesquiterpene lactones (SL) are plant secondary metabolites that are known for their anti-fungal, anti-bacterial, anti-inflammatory, and anti-tumor properties. Considering that several SL-derived drugs are currently in cancer clinical trials, we have tested two SL molecules, 3-?-methoxy-iso-seco-tanapartholide (?-tan) isolated from Achillea falcata and salograviolide A (Sal A) isolated from Centaurea ainetensis, for their anti-tumor properties. We used the mouse epidermal JB6P?+?cells as a model for tumor promotion and cellular transformation. Key players that are involved in cellular transformation and tumorigenesis are the AP-1 and NF-?B transcription factors; therefore, we assessed how ?-tan and Sal A modulate their signaling pathways in JB6P?+?cells. Methods The effects of ?-tan and Sal A on the growth of normal and neoplastic keratinocytes and on the tumor promotion-responsive JB6P?+?cells were determined using the MTT assay. Anchorage-independent cell growth transformation assays were used to evaluate the anti-tumor promoting properties of these SL molecules in JB6P?+?cells and dual luciferase reporter assays and western blot analysis were used to investigate their effects on tumor promoter-induced AP-1 and NF-?B activities and protein levels of key AP-1 and NF-?B target genes. Results ?-tan and Sal A selectively inhibited tumor promoter-induced cell growth and transformation of JB6P?+?cells at concentrations that do not affect JB6P?+?and primary keratinocytes basal cell growth. In addition, both molecules reduced basal and tumor promoter-induced NF-?B transcriptional activities, differentially regulated basal and tumor promoter-induced AP-1 transcriptional activities, and modulated key players of the AP-1 and NF-?B signaling pathways. Conclusions These results highlight the anti-tumor promoting properties of ?-tan and Sal A. These SL molecules isolated from two plant species native to the Middle East may provide opportunities for complementary medicine practices. PMID:22776414
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.
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 $\\phi$.
Brans-Dicke theory as a unified model for dark matter-dark energy
Hongsu Kim
2005-01-01
The Brans-Dicke (BD) theory of gravity is taken as a possible theory of k-essence coupled to gravity. It is then realized that the BD scalar field does indeed play the role of a k-essence, but in a very unique way which distinguishes it from other k-essence fields studied in the literature. That is, first in the BD scalar field-dominated era
Bianchi type-V dark energy model in Brans-Dicke theory of gravitation
NASA Astrophysics Data System (ADS)
Rao, V. U. M.; Jaya Sudha, V.
2015-05-01
Spatially homogeneous and anisotropic Bianchi type-V with variable equation of state (EOS) parameter and constant deceleration parameter is investigated in the presence of anisotropic dark energy in Brans-Dicke (Phys. Rev. 124:925, 1961) scalar-tensor theory of gravitation. The field equations of this theory have been solved by using the variation law for generalized Hubble's parameter proposed by Bermann (Nuovo Cimento B 74:82, 1983). Some physical and kinematical properties of the model are also discussed.
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.
The Chameleon Effect in the Jordan Frame of the Brans--Dicke Theory
Israel Quiros; Ricardo Garca-Salcedo; Tame Gonzalez; F. Antonio Horta-Rangel
2015-06-20
In this paper we investigate the chameleon effect in the different conformal frames of the Brans--Dicke theory. Given that, in the standard literature on the subject, the chameleon is described in the Einstein frame almost exclusively, here we pay special attention to the description of this effect in the Jordan and in the string frames. It is shown that, in general, terrestrial and solar system bounds on the mass of the BD scalar field, and bounds of cosmological origin, are difficult to reconcile at once through a single chameleon potential. We point out that, in a cosmological context, provided that the effective chameleon potential has a minimum within a region of constant density of matter, the Brans--Dicke theory transmutes into general relativity with a cosmological constant, in that region. This result, however, can be only locally valid. In cosmological settings de Sitter--general relativity is a global attractor of the Brans--Dicke theory only for the quadratic potential $V(\\phi)=M^2\\phi^2$, or for potentials that asymptote to $M^2\\phi^2$.
The Chameleon Effect in the Jordan Frame of the Brans--Dicke Theory
Quiros, Israel; Gonzalez, Tame; Horta-Rangel, F Antonio
2015-01-01
In this paper we investigate the chameleon effect in the different conformal frames of the Brans--Dicke theory. Given that, in the standard literature on the subject, the chameleon is described in the Einstein frame almost exclusively, here we pay special attention to the description of this effect in the Jordan and in the string frames. It is shown that, in general, terrestrial and solar system bounds on the mass of the BD scalar field, and bounds of cosmological origin, are difficult to reconcile at once through a single chameleon potential. We point out that, in a cosmological context, provided that the effective chameleon potential has a minimum within a region of constant density of matter, the Brans--Dicke theory transmutes into general relativity with a cosmological constant, in that region. This result, however, can be only locally valid. In cosmological settings de Sitter--general relativity is a global attractor of the Brans--Dicke theory only for the quadratic potential $V(\\phi)=M^2\\phi^2$, or for ...
Supporting wormholes by spacetime parity and topology in Lovelock-Brans-Dicke gravity
David Wenjie Tian
2015-08-30
Following the recent theory of Lovelock-Brans-Dicke gravity, we continue to investigate the conditions to support traversable wormholes by the gravitational effects of spacetime parity and topology, which arise from the nonminimal couplings of a background scalar field to the Chern-Pontryagin density and the Gauss-Bonnet invariant. The flaring-out condition indicates that a Morris-Thorne-type wormhole can be maintained by violating the generalized null energy condition, and thus also breaking down the generalized weak, strong, and dominant energy conditions; meanwhile, analyses of the zero-tidal-force solution show that the standard energy conditions in general relativity can still be respected by the physical matter threading the wormhole. In this situation, the two topological effects have to dominate over the ordinary-matter source of gravity, and the scalar field is preferred to be noncanonical. Also, we find that it is easier in Lovelock-Brans-Dicke than Brans-Dicke gravity to support wormholes while have the standard energy conditions protected.
Symmetry adapted states and the quantum phase transition in the Dicke model
Castanos, O.; Nahmad-Achar, E.; Lopez-Pena, R.; Hirsch, J. G.
2010-12-23
We study the phase transition properties of the ground state of the Dicke model by means of a variational procedure together with the catastrophe formalism. The proposed variational state is the tensorial product of the SU(2) and Weyl coherent states, and the expectation value of the Dicke Hamiltonian with respect this state is calculated. The stability properties of the energy surface exhibit a phase transition from the normal to the super-radiant behavior of the two-level atoms, when {omega}-tilde{sub a{omega}}-tilde{sub F} = {+-}4{gamma}-tilde{sup 2}. At the same time, the analytic form of the ground state in terms of the minimum critical points of the system is obtained. The Dicke Hamiltonian is invariant under transformations of the point group C{sub 2} = {l_brace}I,exp(i{pi}{Lambda}-circumflex){r_brace}, with {Lambda} circumflex the excitation number operator. To restore this parity symmetry, we separate the variational proposed states into orthogonal even and odd components, which give rise to analytic expressions for the ground and first excited states. The fidelity of these projected variational states is verified by studying their overlap with the exact quantum results.
Bianchi type-III models with anisotropic dark energy in Brans-Dicke-Rastall theory
NASA Astrophysics Data System (ADS)
Salako, Ines G.; Jawad, Abdul
2015-10-01
In this paper, we consider the Bianchi type-III metric (which is a spatially homogeneous and anisotropic) in the framework of a newly proposed Brans-Dicke-Rastall theory of gravitation by Carams et al. (Eur. Phys. J. C 74:3145, 2014. In this scenario, we obtain the generalized form of the anisotropy parameter of the expansion, the dynamically anisotropic equation of state parameter, and a dynamical energy density in the presence of a single diagonal imperfect fluid. By assuming the anisotropy of the fluid, and exponential and power-law volumetric expansions, we find the exact solutions of the Brans-Dicke-Rastall field equations. We examine the isotropy of the fluid, of space, and of the expansion of the universe. It is observed that the universe can approach the isotropy monotonically even in the presence of an anisotropic fluid. We also note that the strong anisotropy observed in RG, respectively, is diminished considerably in the Rastall theory and Brans-Dicke-Rastall theory because of the influence of the parameters and.
Electrostatic Potential of a Point Charge in a Brans-Dicke Reissner-Nordstrom Field
Maya Watanabe; A. W. C Lun
2013-08-12
We consider the Brans-Dicke Reissner-Nordstrom spacetime in isotropic coordinates and the electrostatic field of an electric point charge placed outside its surface of inversion. We treat the static electric point charge as a linear perturbation on the Brans-Dicke Reissner-Nordstrom background. We develop a method based upon the Copson method to convert the governing Maxwell equation on the electrostatic potential generated by the static electric point charge into a solvable linear second order ordinary differential equation. We obtain a closed form fundamental solution of the curved space Laplace equation arising from the background metric, which is shown to be regular everywhere except at the point charge and its image point inside the surface of inversion. We also develop a method that demonstrates that the solution does not contain any other charge that may creep into the region that lies beyond the surface of inversion and which is not covered by the isotropic coordinates. The Brans-Dicke Reissner-Nordstrom spacetime therefore is linearly stable under electrostatic perturbations. This stability result includes the three degenerate cases of the fundamental solution that correspond to the Brans Type 1, the Reissner-Nordstrom and the Schwarzschild background spacetimes.
of education and career development for the American people. Dick is also President of the Streit Council, becoming a U. S. citizen in 1973. From 1976 to 1978 he was Deputy Director of NASA's Astrophysics Division). Dick has authored more than 200 publications, including research papers in theoretical astrophysics
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.
Ma, Jian; Blackledge, William; Boss, Gerry R.
2010-01-01
Primary data for the temperature dependent solubility of HCN in water do not presently exist for low concentrations of HCN at environmentally or physiologically relevant temperatures. Henrys Law constant (KH, M/atm) for the vapor-solution equilibrium of HCN was determined in 0.1 M sodium phosphate buffer (adjusted to pH 9.000.03 at 296.60.1 K) from 287311 K. Stable gas phase concentrations of HCN are generated by established techniques, via air equilibration of aqueous cyanide partitioned by a microporous membrane. The effluent gaseous HCN, in equilibrium with the constant temperature aqueous cyanide, was collected in dilute NaOH and determined by a spectrophotometrically using cobinamide. The KH of HCN may be expressed as ln KH (M/atm) = (8205.7341.9)/T ? (25.3231.144); r2 = 0.9914) where T is the absolute temperature in K. This corresponds to 9.02 and 3.00 M/atm at 25 and 37.4 C, respectively, compared to actual measurements of 9.86 and 3.22 at 25.0 and 37.8 C, respectively. The technique also allows for convenient generation of trace levels of HCN at ppbv-ppmv levels that can be further diluted. PMID:20302333
Jiang, Bei; Zhou, Zunchun; Dong, Ying; Wang, Bai; Jiang, Jingwei; Guan, Xiaoyan; Gao, Shan; Yang, Aifu; Chen, Zhong; Sun, Hongjuan
2015-05-01
In this study, we investigated the bioremediation of petrochemical wastewater containing BTEX compounds by immobilized Comamonas sp. JB cells. Three kinds of magnetic nanoparticles were evaluated as immobilization supports for strain JB. After comparison with Fe3O4 and a-Fe2O3 nanoparticles, r-Fe2O3 nanoparticle was selected as the optimal immobilization support. The highest biodegradation activity of r-Fe2O3-magnetically immobilized cells was obtained when the concentration of r-Fe2O3 nanoparticle was 120 mg L(-1). Additionally, the recycling experiments demonstrated that the degradation activity of r-Fe2O3-magnetically immobilized cells was still high and led to less toxicity than untreated wastewater during the eight recycles. qPCR suggested the concentration of strain JB in r-Fe2O3-magnetically immobilized cells was evidently increased after eight cycles of degradation experiments. These results supported developing efficient biocatalysts using r-Fe2O3-magnetically immobilized cells and provided a promising technique for improving biocatalysts used in the bioremediation of not only petrochemical wastewater but also other hazardous wastewater. PMID:25837023
A critical review of Henry's law constants for chemicals of environmental interest
NASA Astrophysics Data System (ADS)
Mackay, Donald; Shiu, Wan Ying
1981-10-01
The Henry's law constants (air-water partition coefficients) of hydrophobic organic compounds of environmental concern are reviewed. An outline of the thermodynamic principles which govern the relationships between vapor pressure, solubility and Henry's law constant for solid and liquid compounds is presented and experimental techniques for obtaining these quantities with the required accuracy are discussed. Vapor pressure, solubility, and Henry's law constant data are tabulated and reviewed for a total of 150 compounds in 12 tables consisting of gaseous, liquid and solid alkanes, cycloalkanes, alkenes, alkynes, monoaromatics, polynuclear aromatics, halogenated alkanes, alkenes and aromatics, and selected pesticides.
Experimentally determined Henry's law constants for 17 polychlorobiphenyl congeners
Dunnivant, F.M.; Coates, J.T.; Elzerman, A.W. (Clemson Univ., SC (USA))
1988-04-01
Henry's law constants (HLCs) have been experimentally determined for 17 polychlorobiphenyl (PCB) congeners by a gas-purging technique, with results ranging from 0.3 {times} 10{sup {minus}4} to 8.97 {times} 10{sup {minus}4} atm{center dot}m{sup 3}/mol and an average value of 3.53 {times}10{sup {minus}4} atm{center dot}m{sup 3}/mol for the congeners studied. The experimental results are in good agreement with previously published values. For the entire group of congeners studied, measured HLCs were not correlated with molecular weight but did appear directly related to chlorine substitution pattern. Increasing HLCs coincided with greater degrees of ortho-chlorine substitution within a molecular weight class. This trend may be useful to relate individual HLCs to chlorine substitution patterns for the remaining PCB congeners.
Henry's law constants of diacids and hydroxy polyacids: recommended values
NASA Astrophysics Data System (ADS)
Compernolle, S.; Mller, J.-F.
2014-03-01
In spite of the importance of diacids and functionalised diacids for organic aerosol formation through aqueous-phase processes in droplets and aerosol water, there seems to be no reliable set of experimental values for their Henry's law constants (HLCs). We show that their estimation through the use of infinite dilution activity coefficients is also prone to error. Here we present HLC values for diacids and hydroxy polyacids determined from solubilities, water activities and vapour pressures of solids or solutions, by employing thermodynamic relationships. The vapour pressures are found to be the largest source of error, but the analysis of the obtained HLC points to inconsistencies among specific vapour pressure data sets. Although there is considerable uncertainty, the HLC defined as aqueous concentration per unit gaseous partial pressure of linear ?- and ?-diacids appear to be higher than estimated by the often cited review work of Saxena and Hildemann (1996).
Henry's law constants of diacids and hydroxypolyacids: recommended values
NASA Astrophysics Data System (ADS)
Compernolle, S.; Mller, J.-F.
2013-09-01
In spite of the importance of diacids and functionalised diacids for organic aerosol formation through aqueous-phase processes in droplets and aerosol water, there seems to be no reliable set of experimental values for their Henry's law constants (HLC). We show that their estimation through the use of infinite dilution activity coefficients is also prone to error. Here we present HLC values for diacids and hydroxy polyacids determined from solubilities, water activities and vapour pressures of solids or solutions, by employing thermodynamic relationships. The vapour pressures are found to be the largest source of error, but the analysis of the obtained HLC points to inconsistencies among specific vapour pressure data sets. Although there is considerable uncertainty, the HLC of diacids appear to be higher than estimated by the often cited review work of Saxena and Hildemann (1996).
F. Darabi; F. Felegary
2015-08-29
We study the Interacting Logarithmic Entropy-Corrected Holographic Dark Energy model with different cut-offs in Brans-Dicke cosmology and obtain the equation of state and the squared of sound speed for each cut-off. The former is used to describe the accelerating or decelerating behaviour and the later is used to describe the classical stability or instability of the universe. The correspondence between the scalar field models and the logarithmic entropy-corrected holographic dark energy densities allows us to reconstruct the potentials and the dynamics of the quintessence and tachyon scalar field models in Brans-Dicke cosmology. We show that these models can describe the observed accelerated expansion of our universe with a parameter space consistent with the most recent observational data. However, it turns out that there is fine-tuning problem concerning the value of Brans-Dicke parameter $\\omega$ at early universe which casts doubt on the viability of these dark energy models.
Darabi, F
2015-01-01
We study the Interacting Logarithmic Entropy-Corrected Holographic Dark Energy model with different cut-offs in Brans-Dicke cosmology and obtain the equation of state and the squared of sound speed for each cut-off. The former is used to describe the accelerating or decelerating behaviour and the later is used to describe the classical stability or instability of the universe. The correspondence between the scalar field models and the logarithmic entropy-corrected holographic dark energy densities allows us to reconstruct the potentials and the dynamics of the quintessence and tachyon scalar field models in Brans-Dicke cosmology. We show that these models can describe the observed accelerated expansion of our universe with a parameter space consistent with the most recent observational data. However, it turns out that there is fine-tuning problem concerning the value of Brans-Dicke parameter $\\omega$ at early universe which casts doubt on the viability of these dark energy models.
Determination of Henry's law constants of organics in dilute aqueous solutions
Hansen, K.C.; Zhou, Zhou; Yaws, C.L.; Aminabhavi, T.M. . Dept. of Chemistry)
1993-10-01
Accurate knowledge of Henry's law constants, H, or air/water partitioning coefficients are required to predict the behavior of organic compounds in the environment. In particular, when the compounds are relatively volatile and exhibit low solubility in water, air stripping may be a viable method for above-ground treatment. Henry's law constants of 15 volatile organic compounds in dilute aqueous solutions were measured by the procedure of equilibrium partitioning in a closed system. The method is based upon the measurement of the headspace concentration by gas chromatography. The compounds investigated included six halogenated hydrocarbons, four aromatic hydrocarbons, and five alkanes. The measurements were made at three temperatures between 25 and 45 C. The measured Henry's law constants compared well with the literature data of some liquids. The temperature dependence of Henry's law constant was also studied from the van't Hoff relation.
Reasoning in inconsistent stratified knowledge bases Salem BENFERHAT --Didier DUBOIS --Henri PRADE
Winckler, Marco Antonio Alba
Reasoning in inconsistent stratified knowledge bases Salem BENFERHAT -- Didier DUBOIS -- Henri proposes a discussion of inconsistencytolerant consequence relations in prioritized knowledge bases. These inference techniques extend methods for reasoning from inconsistent, nonstratified, knowledge bases
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
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 ...
Exhuming Henry VIII's Court: The Tudor Household on the Jacobean Stage
Moore, Gaywyn
2011-12-31
VIII offer Henry VIIIs that contribute to the historical process of memorializing the king's, and his household's, legacy. The four plays together provide the overall impression of a disordered house with a divided master--the ideal Renaissance prince...
Oscillating and stagnating plumes in the Earth's lower mantle Henri Samuel , David Bercovici
; convection; compositional heterogeneity; lower mantle; oscillatory 1. Introduction Both geochemicalOscillating and stagnating plumes in the Earth's lower mantle Henri Samuel , David Bercovici mantle, using both high resolution numerical experiments and simple analytical theory. We focus
Federal Register 2010, 2011, 2012, 2013, 2014
2011-01-28
...Tennessee National Wildlife Refuge, Henry...Comprehensive Conservation Plan and Finding...the Fish and Wildlife Service (Service...comprehensive conservation plan (CCP...of fish and wildlife management, conservation, legal...
Markopoulou, Athina
The Henry Samueli School of Engineering Accelerated Status Undergraduate Research Fellowship are eligible to apply for the Accelerated Status Undergraduate Research Fellowship Program. Criteria: 1. Must Samueli School of Engineering Accelerated Status Undergraduate Research Fellowship Application Faculty
Enantioselective synthesis of SSR 241586 by using an organo-catalyzed Henry reaction.
Cochi, Anne; Mtro, Thomas-Xavier; Pardo, Domingo Gomez; Cossy, Janine
2010-08-20
An organo-catalyzed Henry reaction, applied to an alpha-keto ester, has allowed the enantioselective synthesis of SSR 241586, a 2,2-disubstituted morpholine active in the treatment of schizophrenia and irritable bowel syndrome (IBS). PMID:20666443
Henry's Law Constant of Organic Nitriles Measured with GC-FID
NASA Astrophysics Data System (ADS)
Brewer, B.; Gangoda, M.; Lee, S.
2012-12-01
Nitriles are important atmospheric VOCs that paly key roles in the atmospheric nitrogen cycle and secondary aerosol formation. Nitriles and their oxidation products also have serious health effects and thus are important air pollutants. Henry's law constant is an important physical and chemical parameter to determine how gas phase species participate into gas-to-particle conversion and cloud formation and affect human health. Yet, measurements of Henry's law constants of nitriles are entirely lacking. We have developed a simple measurement technique to detect Henry's law constants of organic compounds using gas chromatography flame ionization detector (GC-FID) coupled with a bubble column. In this presentation, we will show Henry's law constants of a number of atmospherically relevant organic nitrile compounds and their temperature dependence.
HABS DC,WASH,515A (sheet 3 of 4) Captain Henry Saunders ...
HABS DC,WASH,515A- (sheet 3 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC
HABS DC,WASH,515A (sheet 4 of 4) Captain Henry Saunders ...
HABS DC,WASH,515A- (sheet 4 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC
HABS DC,WASH,515A (sheet 2 of 4) Captain Henry Saunders ...
HABS DC,WASH,515A- (sheet 2 of 4) - Captain Henry Saunders House, Virginia Room, National Museum of American History, Smithsonian Institution (moved from VA, Windsor vicinity, U.S. Route 460), Washington, District of Columbia, DC
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 ...
Seeking the sabbath of life: figuring the theological self after Michel Henry
Rivera, Joseph Manuel
2013-07-05
This thesis introduces and examines the work of French philosopher Michel Henry with particular focus on his phenomenological-theological analyses of the self. Given its thematic emphasis, the thesis incorporates several ...
"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. ...
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 ...
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...
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.
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.
Stress-induced generation of N-acylethanolamines in mouse epidermal JB6 P+ cells.
Berdyshev, E V; Schmid, P C; Dong, Z; Schmid, H H
2000-01-01
It has long been known that N-acylethanolamine phospholipids [N-acylphosphatidylethanolamine (N-acyl PE)] and N-acylethanolamines (NAEs) accumulate in mammalian tissues undergoing degenerative membrane changes associated with necrosis. Here we studied the effects of stress factors (UVB irradiation and serum deprivation) on the endogenous levels of N-acyl PE and NAE in mouse epidermal JB6 P(+) cells. We found that 16:0, 18:0, 18:1,n-9 and 18:1,n-7 are the predominant amide-linked fatty acids in both N-acyl PE and NAE in these cells. UVB irradiation and serum deprivation resulted in significantly increased levels of N-acyl PE and NAE, especially 18:1, n-9 N-acyl PE and NAE. UVB challenge increased the cellular content of anandamide (20:4,n-6 NAE), but this increase was the lowest of all NAEs measured. Serum deprivation resulted in a decreased cellular anandamide level, as well as a decrease in 20:4,n-6 N-acyl PE. Interestingly, the replacement of serum-free medium with medium containing 5% (v/v) fetal calf serum after 36 h of serum deprivation restored N-acyl PE and NAE levels almost completely within 4-8 h. These data suggest the involvement of N-acyl PE and NAE in cellular responses to stress. PMID:10677355
A review of "Henry Vaughans Silex Scintillans: Scripture Uses." by Philip West
Alan Rudrum
2003-01-01
West. Henry Vaughan?s Silex Scintillans: Scripture Uses. Oxford: Oxford University Press, 2001. xii + 271 pp. $70.00. Review by ALAN RUDRUM, SIMON FRASER UNIVERSITY. Henry Vaughan?s verse is saturated in biblical reference, and it may seem odd...?s Aqua Vit?: Non Vitis (British Library MS, Sloane 1741). Tempe: Arizona Center for Medieval and Renaissance Studies, 2001. liii + 270 pp. $35.00 Review by ALAN RUDRUM, SIMON FRASER UNIVERSITY. Insofar as modern students of literature are aware...
De Bruyn, W.J.; Swartz, E.; Hu, J.H. [Boston College, Chestnut Hill, MA (United States)] [and others] [Boston College, Chestnut Hill, MA (United States); and others
1995-04-20
Biogenically produced reduced sulfur compounds, including dimethylsulfide (DMS, CH{sub 3}SCH{sub 3}), hydrogen sulfide (H{sub 2}S), carbon disulfide (CS{sub 2}), methyl mercaptan (CH{sub 3}SH), and carbonyl sulfide (OCS), are a major source of sulfur in the marine atmosphere. This source is estimated to contribute 25-40% of global sulfur emissions. These species and their oxidation products, dimethyl sulfoxide (DMSO), dimethyl sulfone (DMSO{sub 2}), and methane sulfonic acid (MSA), dominate the production of aerosol and cloud condensation nuclei (CCN) in the clean marine atmosphere. The multiphase chemical processes for these species must be understood in order to study the evolving role of combustion-produced sulfur oxides over the oceans. Using a newly developed bubble column apparatus, a series of aqueous phase uptake studies have been completed for the reduced sulfur species DMS, H{sub 2}S, CS{sub 2}, CH{sub 3}SH, and OCS. Aqueous phase uptake has been studied as a function of temperature (278-298 K), pH (1-14), H{sub 2}O{sub 2} concentration (0-1 M), NaCl concentration (0-5 M), and (NH{sub 4}){sub 2}SO{sub 4} concentration (0-4 M). The Henry`s law coefficients for CH{sub 3}SH and CS{sub 2} were determined for the first time, as were the Setchenow coefficients for all the species studied. 33 refs., 8 figs., 2 tabs.
NASA Astrophysics Data System (ADS)
Satish, J.; Venkateswarlu, R.
2014-12-01
In this paper we consider chameleonic generalized Brans-Dicke cosmology in the framework of Kantwoski-Sacks universes. We investigate the time dependence of the Brans-Dicke parameter ?( t) for an expanding Universe, and obtain an explicit dependence of ?( t) in different expansion phases of the Universe. Here we take the power law form of the scale factor. The behaviour of ?( t) is studied for matter-dominated, vacuum-energy-dominated universe, radiation-dominated and mass-less scalar-field-dominated era. It is also proposed to study the nature of the deceleration parameter.
Demjn, Zsfia; Semino, Elena
2015-06-01
The book Henry's Demons (2011) recounts the events surrounding Henry Cockburn's diagnosis of schizophrenia from the alternating perspectives of Henry himself and his father Patrick. In this paper, we present a detailed linguistic analysis of Henry's first-person accounts of experiences that could be described as auditory verbal hallucinations. We first provide a typology of Henry's voices, taking into account who or what is presented as speaking, what kinds of utterances they produce and any salient stylistic features of these utterances. We then discuss the linguistically distinctive ways in which Henry represents these voices in his narrative. We focus on the use of Direct Speech as opposed to other forms of speech presentation, the use of the sensory verbs hear and feel and the use of 'non-factive' expressions such as I thought and as if. We show how different linguistic representations may suggest phenomenological differences between the experience of hallucinatory voices and the perception of voices that other people can also hear. We, therefore, propose that linguistic analysis is ideally placed to provide in-depth accounts of the phenomenology of voice hearing and point out the implications of this approach for clinical practice and mental healthcare. PMID:25505160
Uehara, Hisatoshi; Imashiro, Ritsuo; Hernndez-Torres, Gloria; Barbas, Carlos F.
2010-01-01
Given the significance of carbohydrates in life, medicine, and industry, the development of simple and efficient de novo methods to synthesize carbohydrates are highly desirable. Organocatalytic asymmetric assembly reactions are powerful tools to rapidly construct molecules with stereochemical complexity from simple precursors. Here, we present a simple and robust methodology for the asymmetric synthesis of pyranose derivatives with talo- and manno- configurations from simple achiral precursors through organocatalytic asymmetric intermolecular MichaelHenry reaction sequences. In this process, (tert-butyldimethylsilyloxy)acetaldehyde 1 was successfully utilized in two ways: as a donor in a highly selective anti-Michael reaction and as an acceptor in a consecutive Henry reaction. Varied nitroolefins served as Michael acceptors and varied aldehydes substituted for 1 as Henry acceptors providing for the construction of a wide range of carbohydrates with up to 5 stereocenters. In these reactions, a catalyst-controlled Michael reaction followed by a substrate-controlled Henry reaction provided 3,4-dideoxytalose derivatives 6 in a highly stereoselective manner. The Henry reaction was affected by addition of a simple base such as triethylamine: A complex chiral base was not necessary. 3,4-Dideoxymannose derivatives 7 were produced by simply changing the base from triethylamine to 1,8-diazabicyclo[5.4.0]undec-7-ene. Extension of this methodology to a syn-Michael initiated sequence was also successful. A mechanistic discussion is provided to explain the unusual substrate-induced stereoselectivity of the Henry reaction. PMID:20639468
Exact solutions of Brans-Dicke cosmology and the cosmic coincidence problem
S. Carneiro; A. E. Montenegro Jr
2005-10-28
We present some cosmological solutions of Brans-Dicke theory, characterized by a decaying vacuum energy density and by a constant relative matter density. With these features, they shed light on the cosmological constant problems, leading to a presently small vacuum term, and to a constant ratio between the vacuum and matter energy densities. By fixing the only free parameter of our solutions, we obtain cosmological parameters in accordance with observations of the relative matter density, the universe age and redshift-distance relations.
Attractors, statefinders and observational measurement for chameleonic Brans-Dicke cosmology
Farajollahi, Hossein; Salehi, Amin E-mail: a.salehi@guilan.ac.ir
2010-11-01
We investigate chameleonic Brans-Dicke model applied to the FRW universes. A framework to study stability and attractor solutions in the phase space is developed for the model. We show that depending on the matter field and stability conditions, it is possible to realize phantom-like behavior without introducing phantom filed in the model while the stability is fulfilled and phantom crossing occurs. The statefinder parameters to the model for different kinds of matter interacting with the chameleon scalar field are studied. We also compare our model with present day observations.
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.
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.
O. Firstenberg; M. Shuker; R. Pugatch; D. R. Fredkin; N. Davidson; A. Ron
2008-01-30
We present a theoretical model for electromagnetically induced transparency (EIT) in vapor, that incorporates atomic motion and velocity-changing collisions into the dynamics of the density-matrix distribution. Within a unified formalism we demonstrate various motional effects, known for EIT in vapor: Doppler-broadening of the absorption spectrum; Dicke-narrowing and time-of-flight broadening of the transmission window for a finite-sized probe; Diffusion of atomic coherence during storage of light and diffusion of the light-matter excitation during slow-light propagation; and Ramsey-narrowing of the spectrum for a probe and pump beams of finite-size.
Propagation of quantum particles in Brans-Dicke spacetime: The case of gamma ray bursts
NASA Astrophysics Data System (ADS)
Capozziello, Salvatore; Lambiase, Gaetano
2015-06-01
The propagation of boson particles in a gravitational field described by the Brans-Dicke (BD) 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 (GRBs).
Dicke superradiance as a nondestructive probe for quantum quenches in optical lattices
NASA Astrophysics Data System (ADS)
ten Brinke, Nicolai; Schtzhold, Ralf
2015-07-01
We study Dicke superradiance as collective and coherent absorption and (time-delayed) emission of photons from an ensemble of ultracold atoms in an optical lattice. Since this process depends on the coherence properties of the atoms (e.g., superfluidity), it can be used as a probe for their quantum state. In analogy to pump-probe spectroscopy in solid-state physics, this detection method facilitates the investigation of nonequilibrium phenomena and is less invasive than time-of-flight experiments or direct (projective) measurements of the atom number (or parity) per lattice site, which both destroy properties of the quantum state such as phase coherence.
Bianchi type- anisotropic dark energy model in Brans-Dicke theory of gravitation
NASA Astrophysics Data System (ADS)
Rao, V. U. M.; Jayasudha, V.
2015-08-01
In this paper, we have considered Bianchi type- space-time in the presence of anisotropic dark energy in Brans-Dicke (Phys. Rev. 124:925, 1961). Scalar-tensor theory of gravitation. Three different time dependent skewness parameters along spatial directions are introduced to represent the deviations of pressure from isotropy. Special law of variation for the mean Hubble parameter and variable equation of state (EoS) parameter are used to obtain a determinate solution of the field equations. Some properties of the model are also discussed.
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).
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.
Self-gravitating spherically symmetric fluid models in Brans-Dicke gravity
NASA Astrophysics Data System (ADS)
Sharif, M.; Manzoor, Rubab
2015-09-01
This paper is devoted to study self-gravitating spherically symmetric fluid models in Brans-Dicke gravity. We formulate a set of equations which govern the dynamics of evolving gravitating fluids through Weyl tensor, shear tensor, expansion scalar, anisotropy, energy inhomogeneity, dissipation as well as scalar field. We also discuss some particular cases according to different dynamical conditions. It is concluded that fluid models for regular distribution of scalar field are consistent with general relativity and models due to irregular distribution of scalar field deviate from theory of general relativity.
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.
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.
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
Acoustics and its relation to language: The influence of Dick Bolt
NASA Astrophysics Data System (ADS)
Stevens, Kenneth N.
2003-04-01
Under the mentoring of Dick Bolt, and the stimulation he provided in the Acoustics Laboratory at MIT, many students were exposed to a range of topics in acoustics, including mechanisms of sound generation, radiation, and propagation, noise control, acoustics of resonators and rooms, human responses to sound, and speech perception under various adverse conditions. As someone who became interested in speech communication, I have recognized that this kind of quantitative background in acoustics is an important requirement for developing models of how humans produce speech, how they perceive and understand speech, and how children acquire these skills. Speech production involves sound sources produced by a nonlinear mechanical system and by noise arising from turbulent airflow. Sound is propagated in a vocal tract with yielding walls, and acoustic coupling is introduced by lossy resonators attached to the vocal tract, including the trachea and the nasal cavity. These acoustic principles of sound generation create an inventory of sound types that give rise to distinctive responses in the ears and brains of listeners. The solid grounding in acoustics provided by Dick Bolt and his leadership have helped in the formation of this linkage between acoustics, speech physiology, linguistics, and human perception.
BoseEinstein condensation versus DickeHeppLieb transition in an optical cavity
Piazza, Francesco, E-mail: francesco.piazza@ph.tum.de [Technische Universitt Mnchen, James-Franck-Strae 1, 85748 Garching (Germany)] [Technische Universitt Mnchen, James-Franck-Strae 1, 85748 Garching (Germany); Strack, Philipp [Department of Physics, Harvard University, Cambridge MA 02138 (United States)] [Department of Physics, Harvard University, Cambridge MA 02138 (United States); Zwerger, Wilhelm [Technische Universitt Mnchen, James-Franck-Strae 1, 85748 Garching (Germany)] [Technische Universitt Mnchen, James-Franck-Strae 1, 85748 Garching (Germany)
2013-12-15
We provide an exact solution for the interplay between BoseEinstein condensation and the DickeHeppLieb self-organization transition of an ideal Bose gas trapped inside a single-mode optical cavity and subject to a transverse laser drive. Based on an effective action approach, we determine the full phase diagram at arbitrary temperature, which features a bi-critical point where the transitions cross. We calculate the dynamically generated band structure of the atoms and the associated suppression of the critical temperature for BoseEinstein condensation in the phase with a spontaneous periodic density modulation. Moreover, we determine the evolution of the polariton spectrum due to the coupling of the cavity photons and the atomic field near the self-organization transition, which is quite different above or below the BoseEinstein condensation temperature. At low temperatures, the critical value of the DickeHeppLieb transition decreases with temperature and thus thermal fluctuations can enhance the tendency to a periodic arrangement of the atoms. -- Highlights: Atoms inside a driven cavity can undergo two transitions: self-organization and BEC. The phase diagram has four phases which coexist at a bi-critical point. Atomcavity coupling creates a dynamical lattice for the atoms. Finite temperature can enhance the tendency towards self-organization. We calculate the detailed spectrum of the polaritonic excitations.
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};\\omegaevent and apparent) of the collapsing fluid 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 $\\omega$.
Holographic dark energy in Brans-Dicke theory with logarithmic correction
NASA Astrophysics Data System (ADS)
Sheykhi, A.; Karami, K.; Jamil, M.; Kazemi, E.; Haddad, M.
2012-03-01
In the derivation of holographic dark energy density, the area law of the black hole entropy plays a crucial role. However, the entropy-area relation can be modified from the inclusion of quantum effects, motivated from the loop quantum gravity, string theory and black hole physics. In this paper, we study cosmological implication of the interacting entropy-corrected holographic dark energy model in the framework of Brans-Dicke cosmology. We obtain the equation of state and the deceleration parameters of the entropy-corrected holographic dark energy in a non-flat Universe. As system's IR cutoff we choose the radius of the event horizon measured on the sphere of the horizon, defined as L = ar( t). We find out that when the entropy-corrected holographic dark energy is combined with the Brans-Dicke field, the transition from normal state where w D > -1 to the phantom regime where w D < -1 for the equation of state of interacting dark energy can be more easily achieved for than when resort to the Einstein field equations is made.
Dark matter an effect of gravitation permeability of material in Jordan, Brance - Dicke theory
V. I. Bashkov; S. M. Kozyrev
2001-03-03
Analyzing the static spherically symmetric and rotating ellipsoid solutions in the Newtonian limit of Jordan, Brance - Dicke theory we find the following. In empty space scalar-tensor theories have trivial solution of field equation with constant scalar potential (efficient value of gravitation constant). In this case no celestial-mechanical experiments to reveal a difference between scalar-tensor theories and Einstein theory is not presented possible. However, scalar field, inside the matter, has characteristics like gravitation permeability of material similar electromagnetic permeability of material in Maxwell theories of electromagnetism. Investigation of obtained exact solutions for given functions of a matter distributions in the Newtonian limit of Jordan, Brance - Dicke theory show the efficient value of gravitation constant depends on density of matter, sizes and form of object, as well as on the value of theories coupling constant. That for example led to weakening gravitation force in the central regions of a Galaxies. This assumption constitutes the way to explain observed rotation curves of Galaxies without using cold dark matter.
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.
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
[Hypospadia and infertility of Henry II of France (1519-1559)].
Hatzinger, M; Al-Shajlawi, S; Sohn, M
2014-03-01
Henry II (1519-1559) of France was the second son of Francis I (1494-1547) and Claude de France (1498-1524) born in 1519 in St. Germain-en-Laye. After his older brother's and his father's death in 1547, he was anointed the French king in Reims. In 1533 already, as a 14-year-old boy, for reasons of state, he was married to the same aged Catherine de Medici (1519-1589), as her uncle was Pope Clement VII (1478-1534). The marriage remained childless for 11 years since Henry, due to a distinct hypospadia and a completely sexually inexperienced wife was unable to conceive children with her. His existing liaison to Diane de Poitiers (1499-1566) - a 19-year-older maid of honor of his father Francis I from 1537 until his death - influenced his sexual life immensely.The blame for the childless marriage was placed primarily on his wife, as Henry had become father of an illegitimate daughter with a mistress. Catherine then underwent all possible medical and alchemical procedures to finally give birth to the hoped Dauphin. Ironically, her rival for the favor of her husband, Diane de Poitiers was one of her greatest allies. She made clear that the cause lay with Henry and not with his wife. This was confirmed by the added solid physician Jean Fernel (1497-1558). His treatment of Henry and the simultaneous training of the unexperienced Catherine by Diane de Poitiers led to success.The result was the birth of Francis II (1544-1560) in 1544, the first of 10 children in 12 years. Thus, the dynasty was saved. After the death of Henry in a tragic tournament accident in 1559, three of his sons became kings of France. But the line of Valois remained without further descendants and was continued by Henry IV, the first Bourbon king in 1589. PMID:24585117
Nakamura, Riou; Hashimoto, Masa-aki; Arai, Kenzo
2006-07-12
We investigate the big-bang nucleosynthesis (BBN) in a Brans-Dicke model with a varying {lambda} term. We find that the cosmic expansion rate differs appreciably from that of the Friedmann model during the BBN epoch . The produced abundances of 4He, D, and 7Li are consistent with both the observed ones and the baryon density obtained from WMAP.
Support vector classifiers: a first look David Tax, Dick de Ridder and Robert P.W. Duin
Duin, Robert P.W.
Support vector classifiers: a first look David Tax, Dick de Ridder and Robert P.W. Duin Pattern, The Netherlands email: fdavidt,dickg@ph.tn.tudelft.nl Keywords: pattern recognition, support vector classifiers. In support vectors classifiers the input vectors are mapped to a high dimensional feature space
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.
with NASA, either here at Goddard or at one of the many other centers across the country." Howard Hui and develop a software tool to predict solar weather events hazardous to NASA missions, and send threat://henry.pha.jhu.edu/ On 2008 July 16, five summer interns at NASA's Goddard Space Flight Center in Maryland were awarded John
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
Using an internal standard method to determine Henry's law constants.
Ji, Chang; Evans, Emily M
2007-02-01
An internal standard method is developed for the measurement of thermodynamic Henry's law constants (H). In this method, a mixture of the analytes and an internal standard is prepared and used to make a standard solution (organic solvent) and a dilute aqueous solution. Both the standard solution and the headspace samples above the aqueous solution at partitioning equilibrium in closed containers are subject to gas chromatographic (GC) analysis. Subsequently, the values of H for the analytes can be calculated from the known H of the internal standard and the GC peak-area ratios. Only approximate values of the concentrations of the compounds, the GC injection volumes, and the vapor-phase to liquid-phase volume ratios in the closed containers are needed in this approach. The method works particularly well for compounds that are highly soluble in water or that have low vapor pressures. Experimentally determined values of H are reported for some low-molecular-weight aldehydes, ketones, and nitriles, and their temperature dependencies are examined. The results also are compared with literature values. The applicability of this new approach is limited to compounds that have dimensionless H on the order of 10(-3) or less. PMID:17713209
Henry Ingersoll Bowditch and Oliver Wendell Holmes: stethoscopists and reformers.
Felts, John H
2002-01-01
Two Bostonians, Henry Ingersoll Bowditch (1808-1892) and Oliver Wendell Holmes (1809-1894), went to Paris for advanced medical training and came home ardent disciples of Pierre Charles Alexandre Louis, leader of the French school that derived its eminence from expert auscultation and careful correlation of bedside and autopsy findings. Both Bowditch and Holmes became leaders in 19th-century American medicine. Bowditch, a successful practitioner and prolific medical writer, wrote the first important American text on physical examination and became our first specialist in pulmonary disease. He pioneered in the public health movement, was a charter member and later president of the American Medical Association, and was an abolitionist and an advocate for equal rights for women in medicine. Holmes left practice to become a medical educator. As Dean of Harvard Medical School, he tried unsuccessfully to admit white women and free black men to the school. Although his greatest fame came as a man of letters, Holmes considered himself first a physician and medical educator, and was justifiably proud of his definitive study, "The Contagiousness of Puerperal Fever" (1843). Today, Bowditch and Holmes are little appreciated as pioneers and reformers, but we remain in debt to them both. PMID:12388886
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.
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.
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.
Solute and heat transport model of the Henry and Hilleke laboratory experiment
Langevin, C.D.; Dausman, A.M.; Sukop, M.C.
2010-01-01
SEAWAT is a coupled version of MODFLOW and MT3DMS designed to simulate variable-density ground water flow and solute transport. The most recent version of SEAWAT, called SEAWAT Version 4, includes new capabilities to represent simultaneous multispecies solute and heat transport. To test the new features in SEAWAT, the laboratory experiment of Henry and Hilleke (1972) was simulated. Henry and Hilleke used warm fresh water to recharge a large sand-filled glass tank. A cold salt water boundary was represented on one side. Adjustable heating pads were used to heat the bottom and left sides of the tank. In the laboratory experiment, Henry and Hilleke observed both salt water and fresh water flow systems separated by a narrow transition zone. After minor tuning of several input parameters with a parameter estimation program, results from the SEAWAT simulation show good agreement with the experiment. SEAWAT results suggest that heat loss to the room was more than expected by Henry and Hilleke, and that multiple thermal convection cells are the likely cause of the widened transition zone near the hot end of the tank. Other computer programs with similar capabilities may benefit from benchmark testing with the Henry and Hilleke laboratory experiment. Journal Compilation ?? 2009 National Ground Water Association.
ERIC Educational Resources Information Center
Henry Ford Community Coll., Dearborn, MI.
This agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers, American Federation of Teachers, Local 1650 covers the period of 1973-1975. Contents of the agreement cover recognition, board of trustee rights, union-board relations, conditions of employment, seniority, the
ERIC Educational Resources Information Center
Henry Ford Community Coll., Dearborn, MI.
This collective bargaining agreement between the Board of Trustees of Henry Ford Community College and the Henry Ford Community College Federation of Teachers establishes conditions of employment for all full-time teachers, counselors, librarians, placement officers, and selected other professional personnel. The articles in the agreement set
Henry County and the Public Library: Report of a Self-Study by the Blue Ridge Regional Library.
ERIC Educational Resources Information Center
Ragsdale, Betty M.; And Others
An in-depth examination of Henry County and the Blue Ridge Regional Library in Virginia was conducted to assess the effectiveness, needs, and objectives of the library. Included are a brief history of Henry County, its physical, social, and economic characteristics and projections, and an evaluation of district census data. A detailed description
40 CFR Appendix Vi to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X
Code of Federal Regulations, 2014 CFR
2014-07-01
...false Compounds With Henry's Law Constant Less Than 0.1 Y/X VI Appendix VI to Part 265 Protection of Environment ...265Compounds With Henry's Law Constant Less Than 0.1 Y/X Compound name CAS No. Acetaldol 107-89-1...
40 CFR Appendix Vi to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X
Code of Federal Regulations, 2012 CFR
2012-07-01
...false Compounds With Henry's Law Constant Less Than 0.1 Y/X VI Appendix VI to Part 265 Protection of Environment ...265Compounds With Henry's Law Constant Less Than 0.1 Y/X Compound name CAS No. Acetaldol 107-89-1...
40 CFR Appendix Vi to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X
Code of Federal Regulations, 2013 CFR
2013-07-01
...false Compounds With Henry's Law Constant Less Than 0.1 Y/X VI Appendix VI to Part 265 Protection of Environment ...265Compounds With Henry's Law Constant Less Than 0.1 Y/X Compound name CAS No. Acetaldol 107-89-1...
40 CFR Appendix Vi to Part 265 - Compounds With Henry's Law Constant Less Than 0.1 Y/X
Code of Federal Regulations, 2011 CFR
2011-07-01
...false Compounds With Henry's Law Constant Less Than 0.1 Y/X VI Appendix VI to Part 265 Protection of Environment ...265Compounds With Henry's Law Constant Less Than 0.1 Y/X Compound name CAS No. Acetaldol 107-89-1...
of the American West. A student of David Starr Jordanl at Indiana Uni versity during the 1880's, Gilbert (Fig. 1Charles Henry Gilbert (1859-1928), Naturalist-in-Charge, and Chauncey Thomas, Jr. (1850 Charles Henry Gilbert (1859-1928) is an important one in the annals of ichthyology and fisheries bi ology
Verhulst, Ferdinand
Henri Poincar´e, a scientific biography; by Jeremy Gray, Princeton University Press, 2012, xiii of Henri Poincar´e (1854-1912), this is to some extent not a serious issue as he was one of the most is on the scientific achievements of Poincar´e, put in an appropriate historical context. So there are only a few pages
Radio capacity improvement with HSPA+ dual-cell T. Bonald, S.E. Elayoubi, A. El Falou, J.B. Landre
Bonald, Thomas
Radio capacity improvement with HSPA+ dual-cell T. Bonald, S.E. Elayoubi, A. El Falou, J.B. Landre Orange labs Issy-Les-Moulineaux, France Abstract This paper studies the radio capacity improvement measurements, link-level simulations, and a queuing theory- based statistical capacity model, thereby providing
Nizet, Victor
.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 is required for capsule polymerization and export in group B Streptococcus and Streptococcus pneumoniae
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
McConnell, C.L.; Rybolt, T.R. (Univ. of Tennessee, Chattanooga, TN (United States))
1994-01-01
Correlations were developed and used to calculate energetic and structural parameters which, in turn, were used to calculate Henry's law constants for the adsorption of a series of aromatic hydrocarbons on a graphitic carbon surface. The adsorption energetic parameter was correlated with a ratio involving the critical temperature divided by the square root of the critical pressure of the adsorbate molecule. The structural parameter was correlated with the cross-sectional molecular area obtained from available molecular modeling software, CAChe. Calculations of Henry's law constants per unit surface area were compared to available experimental values for 17 aromatic hydrocarbons divided into groups of mono-substituted benzene and methyl-substituted benzene. This approach could be used to predict the extent adsorption in the Henry's law region using only adsorbate molecular properties where correlations have been established for a series of molecules of similar structure. 11 refs., 3 figs., 4 tabs.
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.
Sir Henry Thompson BT, the first English urologist.
Urquhart-Hay, D
1994-04-01
Sir Henry Thompson was a gifted Victorian. As a surgeon he achieved early recognition by successfully removing King Leopold of Belgium's bladder stone where two other eminent surgeons had failed. He was undoubtedly the most famous surgeon of his age, a position he was to occupy for some 30 years. As well as professional eminence he achieved success in an extraordinarily wide range of endeavours. He was an accomplished artist, exhibiting 12 times at the Royal Academy, a connoisseur and collector of china, a keen astronomer, an authority on diet and cooking and a pioneer advocate of cremation. He was interested in poultry-farming, market-gardening and photography. He published two novels sandwiched between a book on tumours of the bladder and another on the prevention of calculous disease, He was a celebrated host and his dinners--called 'Octaves'--at which he served eight courses to eight guests were legendary. To be invited meant one had 'arrived'. He was friendly with artists, scientists and men of letters--Huxley, Browning, Ray Lankester and Thackeray. At the age of 80 he bought himself a motor-car and 2 years later wrote a book on the anatomy of the motor-car engine. Sir Zachary Cope described him as a versatile Victorian, a fitting description of an extra-ordinarily gifted man. A commanding and slightly intimidating figure with little sense of humour, he achieved distinction in professional, artistic and social circles. Not only did he leave his mark on urology he left his mark on Victorian England. PMID:8199818
Stability analysis of agegraphic dark energy in Brans-Dicke cosmology
H. Farajollahi; J. Sadeghi; M. Pourali; A. Salehi
2011-12-29
Stability analysis of agegraphic dark energy in Brans-Dicke theory is presented in this paper. We constrain the model parameters with the observational data and thus the results become broadly consistent with those expected from experiment. Stability analysis of the model without best fitting shows that universe may begin from an unstable state passing a saddle point and finally become stable in future. However, with the best fitted model, There is no saddle intermediate state. The agegraphic dark energy in the model by itself exhibits a phantom behavior. However, contribution of cold dark matter on the effective energy density modifies the state of teh universe from phantom phase to quintessence one. The statefinder diagnosis also indicates that the universe leaves an unstable state in the past, passes the LCDM state and finally approaches the sable state in future.
Dicke-Type Energy Level Crossings in Cavity-Induced Atom Cooling: Another Superradiant Cooling
Masao Hirokawa
2008-12-19
This paper is devoted to energy-spectral analysis for the system of a two-level atom coupled with photons in a cavity. It is shown that the Dicke-type energy level crossings take place when the atom-cavity interaction of the system undergoes changes between the weak coupling regime and the strong one. Using the phenomenon of the crossings we develop the idea of cavity-induced atom cooling proposed by the group of Ritsch, and we lay mathematical foundations of a possible mechanism for another superradiant cooling in addition to that proposed by Domokos and Ritsch. The process of our superradiant cooling can function well by cavity decay and by control of the position of the atom, at least in (mathematical) theory, even if there is neither atomic absorption nor atomic emission of photons.
Astrophysical constraints on primordial black holes in Brans-Dicke theory
Nayak, B; Singh, L P
2010-01-01
We consider cosmological evolution in Brans-Dicke theory with a population of primordial black holes. Hawking radiation from the primordial black holes impacts various astrophysical processes during the evolution of the Universe. The accretion of radiation by the black holes in the radiation dominated era may be effective in imparting them a longer lifetime. We present a detailed study of how this affects various standard astrophysical constraints coming from the evaporation of primordial black holes. We analyze constraints from the present density of the Universe, the present photon spectrum, the distortion of the cosmic microwave background spectrum and also from processes affecting light element abundances after nucleosynthesis. We find that the constraints on the initial primordial black hole mass fractions are tightened with increased accretion efficiency.
Astrophysical constraints on primordial black holes in Brans-Dicke theory
B. Nayak; A. S. Majumdar; L. P. Singh
2010-09-03
We consider cosmological evolution in Brans-Dicke theory with a population of primordial black holes. Hawking radiation from the primordial black holes impacts various astrophysical processes during the evolution of the Universe. The accretion of radiation by the black holes in the radiation dominated era may be effective in imparting them a longer lifetime. We present a detailed study of how this affects various standard astrophysical constraints coming from the evaporation of primordial black holes. We analyze constraints from the present density of the Universe, the present photon spectrum, the distortion of the cosmic microwave background spectrum and also from processes affecting light element abundances after nucleosynthesis. We find that the constraints on the initial primordial black hole mass fractions are tightened with increased accretion efficiency.
Astrophysical constraints on primordial black holes in Brans-Dicke theory
Nayak, B.; Singh, L.P.; Majumdar, A.S. E-mail: archan@bose.res.in
2010-08-01
We consider cosmological evolution in Brans-Dicke theory with a population of primordial black holes. Hawking radiation from the primordial black holes impacts various astrophysical processes during the evolution of the Universe. The accretion of radiation by the black holes in the radiation dominated era may be effective in imparting them a longer lifetime. We present a detailed study of how this affects various standard astrophysical constraints coming from the evaporation of primordial black holes. We analyze constraints arising from the present density of the Universe, the present photon spectrum, the distortion of the cosmic microwave background spectrum and also from processes affecting light element abundances after nucleosynthesis. We find that the constraints on the initial primordial black hole mass fractions are tightened with increased accretion efficiency.
Brans-Dicke-Maxwell solutions for higher dimensional static cylindrical symmetric spacetime
NASA Astrophysics Data System (ADS)
?iftci, Dilek K.; Delice, gr
2015-07-01
In this paper, Brans-Dicke-Maxwell type vacuum solutions are considered for a static cylindrically symmetric spacetime in arbitrary dimensions. Exact solutions are obtained by directly solving the field equations for the case where an azimuthal magnetic field is present. Other configurations such as axial magnetic field case can be obtained by suitably relabeling the coordinates. We have also considered conformally related "Einstein frame" to relate the solutions we have obtained with the dilaton-Maxwell type solutions that exist in the literature. We see that for a special case the general solution we present reduces to dilaton-Melvin spacetime. The general relativistic limit of these solutions is also discussed and we found that this limit is different from the four dimensional case.
Stability of the Einstein static universe in the Jordan-Brans-Dicke theory
NASA Astrophysics Data System (ADS)
Huang, He; Wu, Puxun; Yu, Hongwei
2014-05-01
Emergent theory assumes that the universe originates from an Einstein static (ES) state rather than the big bang singularity, and, thus, provides a possible way to resolve the singularity problem. The stability against all kinds of perturbations that ensures the past eternity of the ES state is crucial for a successful realization of the emergent scenario. Recently, it has been found that in the context of the Jordan-Brans-Dicke (JBD) theory there exists a stable ES solution under homogenous and anisotropic perturbations. In this paper, we extend the analysis to the stability against tensor and inhomogeneous scalar perturbations. We find that, different from general relativity and f(R) theory, a stable ES solution is allowed in the JBD theory when different kinds of perturbations are considered, although the stability conditions are tighter for tensor and inhomogeneous scalar perturbations than those for homogenous and anisotropic ones.
NASA Astrophysics Data System (ADS)
Jawad, A.; Chattopadhyay, S.; Bhattacharya, S.; Pasqua, A.
2015-04-01
The objective of this paper is to discuss the Chameleon BransDicke gravity with non-minimally matter coupling of scalar field. We take modified Holographic Ricci dark energy model in this gravity with its energy density in interaction with energy density of cold dark matter. We assume power-law ansatz for scale factor and scalar field to discuss potential as well as coupling functions in the evolving universe. These reconstructed functions are plotted versus scalar field and time for different values of power component of scale factor n. We observe that potential and coupling functions represent increasing behavior, in particular, consistent results for a specific value of n. Finally, we have examined validity of the generalized second law of thermodynamics and we have observed its validity for all values of n. The financial Supported from Department of Science and Technology, Govt. of India under Project Grant No. SR/FTP/PS-167/2011 is thankfully acknowledged by SC
Collapse-revival dynamics and atom-field entanglement in the non-resonant Dicke model
Alvermann, A; Fehske, H; 10.1103/PhysRevA.85.043803
2012-01-01
We consider the dynamics of atomic and field coherent states in the non-resonant Dicke model. At weak coupling an initial product state evolves into a superposition of multiple field coherent states that are correlated with the atomic configuration. This process is accompanied by the buildup and decay of atom-field entanglement and leads to the periodic collapse and revival of Rabi oscillations. We provide a perturbative derivation of the underlying dynamical mechanism that complements the rotating wave approximation at resonance. The identification of two different time scales explains how the dynamical signatures depend on the sign of detuning between the atomic and field frequency, and predicts the generation of either atomic or field cat states in the two opposite cases. We finally discuss the restrictions that the buildup of atom-field entanglement during the collapse of Rabi oscillations imposes on the validity of semi-classical approximations that neglect entanglement.
Collapse-revival dynamics and atom-field entanglement in the non-resonant Dicke model
A. Alvermann; L. Bakemeier; H. Fehske
2012-04-24
We consider the dynamics of atomic and field coherent states in the non-resonant Dicke model. At weak coupling an initial product state evolves into a superposition of multiple field coherent states that are correlated with the atomic configuration. This process is accompanied by the buildup and decay of atom-field entanglement and leads to the periodic collapse and revival of Rabi oscillations. We provide a perturbative derivation of the underlying dynamical mechanism that complements the rotating wave approximation at resonance. The identification of two different time scales explains how the dynamical signatures depend on the sign of detuning between the atomic and field frequency, and predicts the generation of either atomic or field cat states in the two opposite cases. We finally discuss the restrictions that the buildup of atom-field entanglement during the collapse of Rabi oscillations imposes on the validity of semi-classical approximations that neglect entanglement.
Exploring chaos in the Dicke model using ground-state fidelity and Loschmidt echo
NASA Astrophysics Data System (ADS)
Bhattacharya, Utso; Dasgupta, Sayak; Dutta, Amit
2014-08-01
We study the quantum critical behavior of the Dicke Hamiltonian with finite number of atoms and explore the signature of quantum chaos using measures like the ground-state fidelity and the Loschmidt echo and the time-averaged Loschmidt echo. We show that these quantities clearly point to the classically chaotic nature of the system in the superradiant (SR) phase. While the ground-state fidelity shows aperiodic oscillations as a function of the coupling strength, the echo shows aperiodic oscillations in time and decays rapidly when the system is in the SR phase. We clearly demonstrate how the time-averaged value of the echo already incorporates the information about the ground-state fidelity and stays much less than unity, indicating the classically chaotic nature of the model in the SR phase.
Exploring chaos in the Dicke model using ground-state fidelity and Loschmidt echo.
Bhattacharya, Utso; Dasgupta, Sayak; Dutta, Amit
2014-08-01
We study the quantum critical behavior of the Dicke Hamiltonian with finite number of atoms and explore the signature of quantum chaos using measures like the ground-state fidelity and the Loschmidt echo and the time-averaged Loschmidt echo. We show that these quantities clearly point to the classically chaotic nature of the system in the superradiant (SR) phase. While the ground-state fidelity shows aperiodic oscillations as a function of the coupling strength, the echo shows aperiodic oscillations in time and decays rapidly when the system is in the SR phase. We clearly demonstrate how the time-averaged value of the echo already incorporates the information about the ground-state fidelity and stays much less than unity, indicating the classically chaotic nature of the model in the SR phase. PMID:25215812
Spin squeezing as an indicator of quantum chaos in the Dicke model.
Song, Lijun; Yan, Dong; Ma, Jian; Wang, Xiaoguang
2009-04-01
We study spin squeezing, an intrinsic quantum property, in the Dicke model without the rotating-wave approximation. We show that the spin squeezing can reveal the underlying chaotic and regular structures in phase space given by a Poincar section, namely, it acts as an indicator of quantum chaos. Spin squeezing vanishes after a very short time for an initial coherent state centered in a chaotic region, whereas it persists over a longer time for the coherent state centered in a regular region of the phase space. We also study the distribution of the mean spin directions when quantum dynamics takes place. Finally, we discuss relations among spin squeezing, bosonic quadrature squeezing, and two-qubit entanglement in the dynamical processes. PMID:19518325
Supporting wormholes by spacetime parity and topology in the Lovelock-Brans-Dicke gravity
Tian, David Wenjie
2015-01-01
Following the recent theory of Lovelock-Brans-Dicke gravity, we continue to investigate the conditions to support traversable wormholes by the gravitational effects of spacetime parity and topology, which arise from the nonminimal couplings of a background scalar field with the Chern-Pontryagin density and the Gauss-Bonnet invariant. The flaring-out condition indicates that a Morris-Thorne-type wormhole can be maintained by violating the generalized null energy conditions, and thus also breaking down the generalized weak, strong, and dominant energy conditions. Meanwhile, the standard energy conditions in general relativity may still be respected by the classical matter fields. To meet these requirements, the two topological effects have to dominate over the other sources of gravity, and the scalar field is preferred to be noncanonical.
Power-Law Entropy-Corrected HDE and NADE in Brans-Dicke Cosmology
NASA Astrophysics Data System (ADS)
Sheykhi, A.; Karami, K.; Jamil, M.; Kazemi, E.; Haddad, M.
2012-06-01
Considering the power-law corrections to the black hole entropy, which appear in dealing with the entanglement of quantum fields inside and outside the horizon, the holographic energy density is modified accordingly. In this paper we study the power-law entropy-corrected holographic dark energy in the framework of Brans-Dicke theory. We investigate the cosmological implications of this model in detail. We also perform the study for the new agegraphic dark energy model and calculate some relevant cosmological parameters and their evolution. As a result we find that this model can provide the present cosmic acceleration and even the equation of state parameter of this model can cross the phantom line w D =-1 provided the model parameters are chosen suitably.
Interacting Ricci Logarithmic Entropy-Corrected Holographic Dark Energy in Brans-Dicke Cosmology
NASA Astrophysics Data System (ADS)
Pasqua, Antonio; Khomenko, Iuliia
2013-11-01
In the derivation of Holographic Dark Energy (HDE), the area law of the black hole entropy assumes a crucial role. However, the entropy-area relation can be modified including some quantum effects, motivated from the Loop Quantum Gravity (LQG), string theory and black hole physics. In this paper, we study the cosmological implications of the interacting logarithmic entropy-corrected HDE (LECHDE) model in the framework of Brans-Dicke (BD) cosmology. As systems infrared (IR) cut-off, we choose the average radius of Ricci scalar curvature, i.e. R -1/2. We obtain the Equation of State (EoS) parameter ? D , the deceleration parameter q and the evolution of energy density parameter of our model in a non-flat universe. Moreover, we study the limiting cases corresponding to our model without corrections and to the Einsteins gravity.
Dehghani, M. H. [Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of); Research Institute for Astrophysics and Astronomy of Maragha (RIAAM), Maragha (Iran, Islamic Republic of); Pakravan, J.; Hendi, S. H. [Physics Department and Biruni Observatory, College of Sciences, Shiraz University, Shiraz 71454 (Iran, Islamic Republic of)
2006-11-15
We construct a class of charged rotating solutions in (n+1)-dimensional Maxwell-Brans-Dicke theory with flat horizon in the presence of a quadratic potential and investigate their properties. These solutions are neither asymptotically flat nor (anti)-de Sitter. We find that these solutions can present black brane, with inner and outer event horizons, an extreme black brane or a naked singularity provided the parameters of the solutions are chosen suitably. We compute the finite Euclidean action through the use of counterterm method, and obtain the conserved and thermodynamic quantities by using the relation between the action and free energy in grand-canonical ensemble. We find that these quantities satisfy the first law of thermodynamics, and the entropy does not follow the area law.
Metric factorizability and equivalence of brane world models with Brans-Dicke theory
NASA Astrophysics Data System (ADS)
Chakraborty, Sumanta; SenGupta, Soumitra
2015-07-01
In the standard brane world models, the bulk metric ansatz is usually assumed to be factorizable in brane and bulk coordinates. However, it is not self-evident that it is always possible to factorize the bulk metric. Using the gradient expansion scheme, which involves the expansion of bulk quantities in terms of the brane-to-bulk curvature ratio as a perturbative parameter, we explicitly show that metric factorizability is a valid assumption up to second order in the perturbative expansion. We also argue from our result that the same should be true for all orders in the perturbation scheme. We further establish that the nonlocal terms present in the bulk gravitational field equation can be replaced by the radion field; the effective action on the brane thereby obtained resembles the Brans-Dicke theory of gravity.
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.
NASA Astrophysics Data System (ADS)
Allou, Lyassine; El Maimouni, Lahcen; Le Calv, Stphane
2011-06-01
Henry's law constants H of formaldehyde and benzaldehyde were determined using a dynamic system based on the water/air equilibrium at the interface within the length of a microporous tube. The measurements were conducted over the range 273-293 K in (i) deionized water, (ii) 35 g L -1 solution of NaCl simulating seawater and (iii) two nitric acid solutions, i.e. 0.63 and 6.3 wt%. In pure water, the obtained data were used to derive the following Arrhenius expressions: ln H = (6423 542)/ T - (13.4 2.0) and ln H = (6258 280)/ T - (17.5 1.0) for formaldehyde and benzaldehyde, respectively. The H values, calculated at 293 K from Arrhenius expressions cited above were the following (in units of M atm -1): H = 5020 1170 (formaldehyde), H = 47 5 (benzaldehyde). The temperature dependence of H permits then to derive the solvation enthalpies for both compounds: ? Hsolv = -(53.4 4.5) kJ mol -1 and ? Hsolv = -(52.0 2.3) kJ mol -1 for formaldehyde and benzaldehyde, respectively. In 35 g L -1 salt solution, the H values were 27-66% and 12-21% lower than their respective determinations in deionized water, for formaldehyde and benzaldehyde respectively. The observed salt effect was used to estimate the following Setschenow coefficients at 293 K for 0.6 M NaCl: formaldehyde (0.21) and benzaldehyde (0.09). In 6.3 wt% nitric acid solution, H values of benzaldehyde were approximately 30% higher than those found in pure water although no significant influence was observed for formaldehyde. Finally, our experimental data were then used to estimate the fractions of formaldehyde and benzaldehyde in atmospheric aqueous phase and their derived atmospheric lifetimes.
Rybolt, T.R.; Epperson, M.T.; Weaver, H.W.; Thomas, H.E.; Clare, S.E.; Manning, B.M.; McClung, J.T.
1995-07-01
Gas-solid chromatography was used to determine the Henry`s law second gas-solid virial coefficients within the temperature range of 314--615 K for ethane, propane, butane, isobutane, pentane, hexane, heptane, chloromethane, dichloromethane, trichloromethane, tetrachloromethane, trichlorofluoromethane (Freon 11), chlorodifluoromethane (Freon 22), dichlorodifluoromethane (Freon 12), methyl ether, ethyl ether, and sulfur hexafluoride with Carbopack B, a microporous carbon adsorbent. The temperature dependence of the second gas-solid virial coefficients of these adsorbates was used in conjunction with analyses based on a graphical method, a single-surface numeric integration method, a single-surface analytic expression method, and a two-surface analytic expression method to determine the gas-solid interaction energies and other parameters. The interaction energies were correlated with a ratio of the critical temperature divided by the square root of the critical pressure. The four methods were compared in their abilities to successfully calculate second gas-solid virial coefficient values.
Temperature-Dependent Henry's Law Constants of Atmospheric Amines.
Leng, Chunbo; Kish, J Duncan; Roberts, Jason E; Dwebi, Iman; Chon, Nara; Liu, Yong
2015-08-20
There has been growing interest in understanding atmospheric amines in the gas phase and their mass transfer to the aqueous phase because of their potential roles in cloud chemistry, secondary organic aerosol formation, and the fate of atmospheric organics. Temperature-dependent Henry's law constants (KH) of atmospheric amines, a key parameter in atmospheric chemical transport models to account for mass transfer, are mostly unavailable. In this work, we investigated gas-liquid equilibria of five prevalent atmospheric amines, namely 1-propylamine, di-n-propylamine, trimethylamine, allylamine, and 4-methylmorpholine using bubble column technique. We reported effective KH, intrinsic KH, and gas phase diffusion coefficients of these species over a range of temperatures relevant to the lower atmosphere for the first time. The measured KH at 298 K and enthalpy of solution for 1-propylamine, di-n-propylamine, trimethylamine, allylamine, and 4-methylmorpholine are 61.4 4.9 mol L(-1) atm(-1) and -49.0 4.8 kJ mol(-1); 14.5 1.2 mol L(-1) atm(-1) and -72.5 6.8 kJ mol(-1); 8.9 0.7 mol L(-1) atm(-1) and -49.6 4.7 kJ mol(-1); 103.5 10.4 mol L(-1) atm(-1) and -42.7 4.3 kJ mol(-1); and 952.2 114.3 mol L(-1) atm(-1) and -82.7 9.7 kJ mol(-1), respectively. In addition, we evaluated amines' characteristic times to achieve gas-liquid equilibrium for partitioning between gas and aqueous phases. Results show gas-liquid equilibrium can be rapidly established at natural cloud droplets surface, but the characteristic times may be extended substantially at lower temperatures and pHs. Moreover, our findings imply that atmospheric amines are more likely to exist in cloud droplets, and ambient temperature, water content, and pH of aerosols play important roles in their partitioning. PMID:26200814
Annie Jump Cannon: `` Life after The Henry Draper Catalogue.''
NASA Astrophysics Data System (ADS)
Welther, B. L.
1993-05-01
Seventy-five years ago the first three volumes of The Henry Draper Catalogue were published. The pages printed in 1918 contain the spectral types, revised magnitudes, and updated positions for more than 77,000 stars. For the nine volumes of the catalogue, Cannon classified spectra for 225,300 stars; and in her lifetime, spectra for almost 400,000 stars. This work netted her half a dozen honorary degrees, the Draper Medal of the NAS, and numerous other prizes and honors. In his preface to Volume 1, Edward Pickering noted that it took two years to process the copy for the initial volumes and estimated that it would take two more years to complete the copy for the remaining volumes. But shortly after he wrote the preface for Volume 3 in December 1918, Pickering died. And it proved to take three times as long as he had predicted to complete the publication of all nine volumes of the catalogue by the spring of 1924. Although Cannon had enjoyed much more independence and status than the other women at HCO, she had looked to Pickering for guidance and financial support for her astronomical projects. Without him, she had to develop other resources and also had to represent the Harvard Classification for the first IAU meeting in Rome in 1922. Although she did not attend the meeting, she corresponded with Frederick Seares at Mount Wilson Observatory about various questions that astronomers had raised about classifying spectra. Meanwhile, in 1921 Harlow Shapley was appointed Director of HCO. He oversaw the publication of the final volumes of the HD and encouraged Cannon to extend it for stars in special regions. For the HD Extension, he hired Margaret Walton to assist Cannon. But the cost of labor to determine positions and magnitudes was prohibitive, so for many stars the HDE lists only the BD number and spectral type. Even that format proved too costly in the depression and war years. Consequently, the last volume of the HDE was published as charts after World War II.
[Henry Toussaint and Louis Pasteur. Rivalry over a vaccine].
Chevallier-Jussiau, Nadine
2010-01-01
Henry Toussaint (1847-1890) is a veterinary who studied in Veterinary School of Lyon with his great master Auguste Chauveau the famous physiologist. This place is the First School founded in Europe at the end of the XVIIIth century and has opened a way of thinking. His carrer brilliant and rich begins first in Lyon and then when he is named Professor of Anatomy and Physiology at the Veterinary School of Toulouse. Doctor of Science and Doctor of Medecine Toussaint applies "the experimental method" to his research in his laboratory and makes a lot of publications. He starts with Anatomy, then Physiology and soon he prioritizes his research to infestious diseases which cause serious damage to cattle in this time. He developes his own methods about anthrax an its "bacteridie", its nature, its way of culture and especially he studies the physiopathology of this disease. Pasteur is a renowned scientist who does study Microbiology at the same time in his laboratory in Paris, and precisely anthrax. He has explained his theories about "microbes" and has predominant advice. Toussaint admires Pasteur; in the year 1879 he finds first and isolates the microbe of "cholera des poules" (now Pasteurella) and gives Pasteur this new germ which will be used by Pasteur for his particular works about reducing of virulence by successive subcultures. In 1880 with his publishing on July 12 at the Academy of Science, Toussaint presents his successful result with an attenuated vaccine against anthrax: he has got protection against anthrax for dogs and sheep by using a vaccine which he has reduced off virulence by chemical manner. Academy congratulates him. Pasteur jealous of one's reputation contests the demonstration of Toussaint because he does not believe in the chemical method too different from his tests but will make use of this method for an experience open to the public in Pouilly-le-Fort in 1881. After this promotional event Pasteur will product and sell vaccines maked in his laboratory in Paris with the first chemical method of Toussaint. Pasteur gets glory and money. In the following time Toussaint tries another research on tuberculosis but soon he feels the first attacks of a neurologic illness and inescapably his mind declines until the death in 1890. PMID:20527335
NASA Astrophysics Data System (ADS)
Hansen, Jakob; Yeom, Dong-han
2014-10-01
We investigate gravitational collapses of charged black holes in string-inspired gravity models, including dilaton gravity and braneworld model, as well as f( R) gravity and the ghost limit. If we turn on gauge coupling, the causal structures and the responses of the Brans-Dicke field depend on the coupling between the charged matter and the BransDicke field. For Type IIA inspired models, a Cauchy horizon exists, while there is no Cauchy horizon for Type I or Heterotic inspired models. For Type IIA inspired models, the no-hair theorem is satisfied asymptotically, while it is biased to the weak coupling limit for Type I or Heterotic inspired models. Apart from string theory, we find that in the ghost limit, a gravitational collapse can induce inflation by itself and create one-way traversable wormholes without the need of other special initial conditions.
Study of Antigravity in an F(R) Model and in Brans-Dicke Theory with Cosmological Constant
V. K. Oikonomou; N. Karagiannakis
2014-08-02
We study antigravity, that is having an effective gravitational constant with a negative sign, in scalar-tensor theories originating from $F(R)$-theory and in a Brans-Dicke model with cosmological constant. For the $F(R)$ theory case, we obtain the antigravity scalar-tensor theory in the Jordan frame by using a variant of the Lagrange multipliers method and we numerically study the time dependent effective gravitational constant. As we shall demonstrate by using a specific $F(R)$ model, although there is no antigravity in the initial model, it might occur or not in the scalar-tensor counterpart, mainly depending on the parameter that characterizes antigravity. Similar results hold true in the Brans-Dicke model.
Study of Antigravity in an F(R) Model and in Brans-Dicke Theory with Cosmological Constant
Oikonomou, V K
2014-01-01
We study antigravity, that is having an effective gravitational constant with a negative sign, in scalar-tensor theories originating from $F(R)$-theory and in a Brans-Dicke model with cosmological constant. For the $F(R)$ theory case, we obtain the antigravity scalar-tensor theory in the Jordan frame by using a variant of the Lagrange multipliers method and we numerically study the time dependent effective gravitational constant. As we shall demonstrate by using a specific $F(R)$ model, although there is no antigravity in the initial model, it might occur or not in the scalar-tensor counterpart, mainly depending on the parameter that characterizes antigravity. Similar results hold true in the Brans-Dicke model.
Thermodynamics of topological black holes in Brans-Dicke gravity with a power-law Maxwell field
Zangeneh, M Kord; Sheykhi, A
2015-01-01
In this paper, we present a new class of higher dimensional exact topological black hole solutions of the Brans-Dicke theory in the presence of a power-law Maxwell field as the matter source. For this aim, we introduce a conformal transformation which transforms the Einstein-dilaton-power-law Maxwell gravity Lagrangian to the Brans-Dicke-power-law Maxwell theory one. Then, by using this conformal transformation, we obtain the desired solutions. Next, we study the properties of the solutions and conditions under which we have black holes. Interestingly enough, we show that there is a cosmological horizon in the presence of a negative cosmological constant. Finally, we calculate the temperature and charge and then by calculating the Euclidean action, we obtain the mass, the entropy and the electromagnetic potential energy. We find that the entropy does not respect the area law, and also the conserved and thermodynamic quantities are invariant under conformal transformation. Using these thermodynamic and conserv...
On the Local-indicability Cohen-Lyndon Theorem Yago Antolin, Warren Dicks and Peter A. Linnell
Dicks, Warren
On the Local-indicability Cohen-Lyndon Theorem Yago Antol´in, Warren Dicks and Peter A. Linnell and an element r of F, we say that r is Cohen-Lyndon aspherical in F if F {r} is a Whitehead subset of the subgroup of F that is generated by F {r}. In 1963, D. E. Cohen and R. C. Lyndon independently showed
Bhattacharya, Utso; Dasgupta, Sayak; Dutta, Amit
2015-03-01
Although we agree with the fact reported in Garca-Mata et al. [Phys. Rev. E 91, 036901 (2015)] that a computational error resulted in misinterpretation of the behavior of the ground-state fidelity only, we emphasize below that this does not alter the main conclusion of our paper. That is the main claim that we had made about the use of quantum information measures to study chaos in the Dicke model still holds true. PMID:25871258
Comment on "Exploring chaos in the Dicke model using ground-state fidelity and the Loschmidt echo"
I. Garca-Mata; A. J. Roncaglia; D. A. Wisniacki
2014-10-24
In [PRE \\textbf{90}, 022920 (2014), arXiv:1404.6738] 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.
Amin Salehi; Hossein Farajollahi; Jafar Sadeghi; M. Pourali
2015-02-09
We present an autonomous phase-plane describing the evolution of field equations containing an agegraphic dark energy in 5D Brans- Dicke cosmology. To observationally verify the numerical results, we simultaneously solve the equations by constraining the model parameters with SNe Ia data. We find conditions for the existence and stability of the critical points (states of the universe) and numerically examine the cosmological parameters. We also investigate the model by means of statefinder diagnostic.