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Sample records for francis group boca

  1. Book review of Insect Symbiosis. Volume 2. Bourtzis, K.A. and Miller, T.A. editros. 2006 CRC Press, Taylor and Francis Group, Boca Raton, FL, 276 pp. ISBN 0-8493-1286-8

    Hoy, M.A.

    2007-01-01

    There are several definitions of symbiosis, but in this book it involves an association where one organism (the symbiont) lives within or on the body of another organism (the host), regardless of the actual effect on the host. Some symbioses are mutualistic, some parasitic, and some involve commensalism, in which one partner derives some benefit without either harming or benefiting the other. This is the second volume in this exciting and rapidly advancing topic by these editors. The first volume was published in 2003 and during the intervening three years additional data have been produced that make this book a useful addition to your library. The first book provided chapters that provided an overview of insect symbiosis, discussions of the primary aphid symbiont Buchnera and other aphid symbionts, symbiosis in tsetse, symbionts in the weevil Sitophilus , the possible use of paratransgenic symbionts of Rhodnius prolixis to prevent disease transmission, bark beetle and fungal symbiosis, symbionts of tephritid fruit flies, symbionts affecting termite behavior, an overview of microsporidia as symbionts (parasites?) of insects, an overview of a newly discovered bacterium that causes sex-ratio distortion in insects and mites (from the Bacteroides group), symbionts that selectively kill male insects, and several chapters on the ubiquitous endosymbiont Wolbachia

  2. Boca de Potrerillos

    Murray, William Breen

    Boca de Potrerillos is an archaeological site located in the municipio of Mina, Nuevo León, about 60 km. northwest of Monterrey, Mexicós third largest city. Its principal feature is one of the largest concentrations of petroglyphs in the country. Archaeoastronomical features include petroglyphic markers of the cardinal directions, dot configurations which count lunar synodic periods, and one of the earliest horizon calendars in North America. They indicate that the site was probably used for sky observation from the Middle Archaic time period onward and may represent evidence of the initial stages in the development of Mesoamerican numeration and astronomy.

  3. Francis Bacon and Jacobean legitimation

    Rodríguez García, José María

    1997-01-01

    Francis Bacon (1561-1626) maintained a lifelong interest in the institutional implementation of experimental science. What changed over the years were the rhetorical strategies employed to give this project legitimacy. I systematize those changes by dividing Bacon's works into three groups according to three criteria: what rite of officialization is enacted in each text (e.g., conversion, fatherly generation, royal delegation); who the inscribed addressee is (e.g., an imagin...

  4. Francis Picabia hilislooming

    1998-01-01

    Aastavahetusel Hamburgi teises Deichtorhalles olnud näitusest, kus eksponeeriti Francis Picabia (1879-1953) loomingut alates 1935. aastast. Näitus tutvustas Picabiat kui aktimaalijat, portretisti, fotograafi ja kirjameest

  5. Fatores de impacto no sucesso do marketing boca a boca on-line

    Jucá Bentivegna,Fernando

    2002-01-01

    O marketing boca a boca caracteriza-se pela divulgação de produtos e serviços por canais interpessoais e consiste em um componente essencial no composto de comunicação de diversas empresas. Nesse sentido, o crescimento do número de consumidores conectados à Internet motiva as empresas a buscarem caminhos para maximizar o marketing boca a boca por meio de ferramentas on-line, como o marketing viral. Com o objetivo de identificar as principais características de uma ação eficaz de marketing boc...

  6. 76 FR 78151 - Special Local Regulations; Boca Raton Holiday Boat Parade, Intracoastal Waterway, Boca Raton, FL

    2011-12-16

    ...-AA08 Special Local Regulations; Boca Raton Holiday Boat Parade, Intracoastal Waterway, Boca Raton, FL... Raton Holiday Boat Parade on Saturday, December 17, 2011. The marine parade will consist of... through Friday, except Federal holidays. FOR FURTHER INFORMATION CONTACT: If you have questions on this...

  7. Interviewing Francis Bacon

    Kisters, Sandra

    2012-01-01

    British painter Francis Bacon (1909-1992) was known for the eloquence with which he talked about his art. He was easy to talk to, and was interviewed countless times by numerous critics. However, when studying Bacon's paintings one soon comes across the published interviews with art critic and curator David Sylvester (1924-2001), who interviewed him as many as 18 times between 1962 and 1986. Art historian Sandra Kisters argues that Sylvester's interviews with Bacon are carefully constructed a...

  8. The Francis Crick Institute.

    Peters, Keith; Smith, Jim

    2017-04-01

    The Francis Crick Institute Laboratory, opened in 2016, is supported by the Medical Research Council, Cancer Research UK, the Wellcome Trust, and University College London, King's College London and Imperial College London. The emphasis on research training and early independence of gifted scientists in a multidisciplinary environment provides unique opportunities for UK medical science, including clinical and translational research. © Royal College of Physicians 2017. All rights reserved.

  9. Molecular Diagnosis Of Human Boca virus Gastroenteritis

    Kassem, N.N.; Kamel, E.M.; Ismail, G.A.; Emam, E.K.; Saber, S.M.; EL Ashry, M.A.

    2012-01-01

    The idea that human boca virus (HBoV) infection possibly plays a role in gastroenteritis has been suggested because of the frequent manifestation of gastrointestinal symptoms. The purpose of this study was to investigate the role of HBoV In children with gastroenteritis. We studied the etiologic agents in 100 fecal samples in children suffered from acute gastroenteritis. Bacterial etiological agents were dtected by conventional bacteriological culture, and viral etiologic agents were detected by rotavirus latex agglutination and conventional PCR for HBoV and enteric adenovirus. Enteropathogenic E-Coli (EPEC) was detected in 4% of cases. Rotatavirus, enteric adenovirus and co infection between rotavirus and adenovirus were detected in 14%, 6% and 2% respectively. Human boca virus was detected in 1% of cases without associated respiratory symptoms or co infection with other pathogen which suggests its role in children gastroenteritis

  10. Francis Bacon's behavioral psychology.

    MacDonald, Paul S

    2007-01-01

    Francis Bacon offers two accounts of the nature and function of the human mind: one is a medical-physical account of the composition and operation of spirits specific to human beings, the other is a behavioral account of the character and activities of individual persons. The medical-physical account is a run-of-the-mill version of the late Renaissance model of elemental constituents and humoral temperaments. The other, less well-known, behavioral account represents an unusual position in early modern philosophy. This theory espouses a form of behavioral psychology according to which (a) supposed mental properties are "hidden forms" best described in dispositional terms, (b) the true character of an individual can be discovered in his observable behavior, and (c) an "informed" understanding of these properties permits the prediction and control of human behavior. Both of Bacon's theories of human nature fall under his general notion of systematic science: his medical-physical theory of vital spirits is theoretical natural philosophy and his behavioral theory of disposition and expression is operative natural philosophy. Because natural philosophy as a whole is "the inquiry of causes and the production of effects," knowledge of human nature falls under the same two-part definition. It is an inquisition of forms that pertains to the patterns of minute motions in the vital spirits and the production of effects that pertains both to the way these hidden motions produce behavioral effects and to the way in which a skillful agent is able to produce desired effects in other persons' behavior. (c) 2007 Wiley Periodicals, Inc.

  11. El proceso de renovación urbana en La Boca: organizaciones barriales entre nuevos usos y viejos lugares

    Hilda Herzer

    2007-06-01

    Full Text Available The work analyzes the perspective that the local actors have about the process of urban renewal that is developed in the neighborhood of La Boca and of its incidence in the preservation and transformation of the neighborhood cultural heritage. La Boca is a neighborhood in the City of Buenos Aires (Argentina in which traditionally sectors of low income settled. In that framework, the points of view of three groups of neighborhood leaders are revised: those that head traditional social organizations, the referents of soup kitchens and the leaders of organizations of protesting background. The process that is developed in the neighborhood has installed, in places tied to its historical identity, new uses that re-shape the sense of those public spaces. Old places have now a renewed way of defining that typical use that was always the tourism in La Boca. In fact, a good part of those new uses have not been decided, nor do they involve people from La Boca, and they introduce new actors and logics in this neighborhood scene. In this context, some institutions are in favor of transformations; others are against, and a big part do not take on a clear voice in the debate.//Este trabajo se propone analizar la perspectiva que los actores locales tienen del proceso de renovación urbana en el barrio de La Boca y de su incidencia sobre la preservación y transformación del patrimonio cultural barrial. La Boca es un barrio de la Ciudad de Buenos Aires en el que tradicionalmente habitan familias de bajos ingresos. En este marco, son revisados los puntos de vista de tres grupos de dirigentes barriales: aquellos que lideran organizaciones sociales tradicionales del barrio, los referentes de comedores comunitarios y los líderes de organizaciones de perfil reivindicativo. El proceso de renovación que se está desarrollando en el barrio de La Boca instaló en lugares ligados a su identidad histórica, nuevos usos que reconfiguran el sentido de esos espacios p

  12. Francis Crick (1916–2004)

    Administrator

    The death of Francis Crick deprives us of one of the great- est scientists of the 20th century, whose creativity and power of mind dominated molecular biology in its golden years. Many people have told the story of his achievements; here I would simply like to recollect some of the qualities of this remarkable man. The first ...

  13. Francis Crick (1916–2004)

    Administrator

    him. When somebody gave a lecture, Francis was ready at the end (and often in the middle) to give them a lucid and exact account of what their work meant, for better or for worse. This made the Laboratory of Molecular Biology's end-of-year lectures a terrifying ordeal for many, but in- creased their intellectual value, and ...

  14. [Sir Francis Galton: the father of eugenics].

    Aubert-Marson, Dominique

    2009-01-01

    Not only was Sir Francis Galton a famous geographer and statistician, he also invented "eugenics" in 1883. Eugenics, defined as the science of improving racial stock, was developed from a new heredity theory, conceived by Galton himself, and from the evolution theory of Charles Darwin, transposed to human society by Herbert Spencer. Galton's eugenics was a program to artificially produce a better human race through regulating marriage and thus procreation. Galton put particular emphasis on "positive eugenics", aimed at encouraging the physically and mentally superior members of the population to choose partners with similar traits. In 1904, he presented his ideas in front of a vast audience of physicians and scientists in London. His widely-publicized lecture served as the starting point for the development of eugenics groups in Europe and the United States during the first half of the 20th century.

  15. O duplo legado de Francis Poulenc

    Joana Resende

    2009-12-01

    Full Text Available Déjàvu,or better,déjà écouté is an appropriate expression to describe an audition of certain works by Francis Poulenc (1899-1963. A sui-generis character in 20th century music, Poulenc has questioned the whole heritage that came before him, French or not, according to the premises of the group he belonged to, Les Six, although not always reaching similar results. His main concern was to make good music, an ideal not far from that of Debussy, “music should humbly seek to please” (Harry Halbreich. This article approaches the use of quotation and other processes of allusion in the works by Poulenc, as seen in his voice and piano mélodies cycle La fraîcheur et le feu, identifying thematic, melodic, and harmonic, origins used coherently in several pieces. and helping to solidly build his musical language.

  16. Francis Bacon, un moderne intempestif

    Mavrakis, Annie

    2017-01-01

    À propos de la peinture de Francis Bacon et en prenant appui sur des réflexions de Michel Leiris, cet article se propose de revenir sur la question de la modernité conçue non de façon absolue (LA modernité, non figurative, anti-littéraire) mais relative, dégagée d’une vision historiciste orientée de l’histoire de l’art. Cette modernité est intempestive puisque, s’opposant au classique (cf. La Querelle des Anciens et des Modernes) et non au périmé, elle fait revivre les grandes problématiques ...

  17. Early neogene history of the central American arc from Bocas del Toro, western Panama

    Coates, Anthony G.; Aubry, Marie-Pierre; Berggren, William A.; Collins, Laurel S.; Kunk, Michael J.

    2003-01-01

    A newly discovered sequence of lower to middle Miocene rocks from the eastern Bocas del Toro archipelago, western Panama, reveals the timing and environment of the earliest stages in the rise of the Isthmus of Panama in this region. Two new formations, the Punta Alegre Formation (lower Miocene, Aquitanian to Burdigalian) and the Valiente Formation (middle Miocene, Langhian to Serravallian), are here named and formally described. The Punta Alegre Formation contains a diagnostic microfauna of benthic and planktic foraminifera and calcareous nannofossils that indicate deposition in a 2000-m-deep pre-isthmian neotropical ocean from as old as 21.5–18.3 Ma. Its lithology varies from silty mudstone to muddy foraminiferal ooze with rare thin microturbidite layers near the top. The Valiente Formation, which ranges in age from 16.4 to ca. 12.0 Ma, lies with slight angular unconformity on the Punta Alegre Formation and consists of five lithofacies: (1) columnar basalt and flow breccia, (2) pyroclastic deposits, (3) coarse-grained volcaniclastic deposits, (4) coral-reef limestone with diverse large coral colonies, and (5) marine debris-flow deposits and microturbidites. These lithofacies are interpreted to indicate that after ca. 16 Ma a volcanic arc developed in the region of Bocas del Toro and that by ca. 12 Ma an extensively emergent archipelago of volcanic islands had formed. 39Ar/40Ar dating of basalt flows associated with the fossiliferous sedimentary rocks in the upper part of the Valiente Formation strongly confirms the ages derived from planktic foraminifera and nannofossils. Paleobathymetric analysis of the two new formations in the Valiente Peninsula and Popa Island, in the Bocas del Toro archipelago, shows a general shallowing from lower- through upper-bathyal to upper-neritic and emergent laharic and fluviatile deposits from ca. 19 to 12 Ma. The overlying nonconformable Bocas del Toro Group contains a lower transgressive sequence ranging from basal nearshore

  18. Francis Bacon and the Technology of Style.

    Baker, Christopher

    1983-01-01

    Examines Francis Bacon's intentionally devised style for scientific writings and the theoretical basis of that style. Discusses his emphasis on a truly objective point of view, and his use of aphorisms to adapt to his audience. (HTH)

  19. Francis Crick, DNA, and the Central Dogma

    Olby, Robert

    1970-01-01

    This essay describes how Francis Crick, ex-physicist, entered the field of biology and discovered the structure of DNA. Emphasis is upon the double helix, the sequence hypothesis, the central dogma, and the genetic code. (VW)

  20. Engajamento dos Consumidores com o Boca a Boca Eletrônico Negativo em Lojas de Aplicativos Móveis

    Adrianne Paula Vieira de Andrade

    2017-11-01

    Full Text Available O objetivo do estudo é compreender as motivações do comportamento de engajamento do consumidor com o boca a boca eletrônico (electronic word-of–mouth [eWOM] negativo em plataformas de consumo de aplicativos móveis, utilizando-se como lente de análise a Teoria da Ação Racional (Theory of Reasoned Action [TRA]. Foram realizadas dez entrevistas em profundidade com usuários emissores de comentários negativos, as quais permitiram a construção de um corpus que foi descrito, classificado e interpretado por meio de análise temática de conteúdo. Como generalização analítica, infere-se que os motivadores mais influentes para o engajamento com o eWOM negativo são a Busca por Providências, o Altruísmo, as Emoções Negativas e a Reciprocidade. Com relação aos construtos da TRA, as Atitudes favorecem esse engajamento, mas as Normas subjetivas pouco contribuem para a participação ativa no boca a boca eletrônico negativo. Esta pesquisa pode ajudar os programadores de aplicativos móveis e os analistas de mídias sociais quanto à formulação de estratégias de interação que estimulem o comportamento de engajamento dos consumidores.

  1. Francis Bacon and Magnetical Cosmology.

    Wang, Xiaona

    2016-12-01

    A short-lived but important movement in seventeenth-century English natural philosophy—which scholars call “magnetical philosophy” or “magnetical cosmology”—sought to understand gravity (both terrestrial and celestial) by analogy with magnetism. The movement was clearly inspired by William Gilbert’s De magnete (1600) and culminated with Robert Hooke’s prefiguring of the universal principle of gravitation, which he personally communicated to Isaac Newton in 1679. But the magnetical cosmology, as professed by those in the movement, differed from Gilbert’s philosophy in highly significant ways. Proponents never accepted Gilbert’s animistic account of magnets and seem tacitly to have accepted a belief in action at a distance that Gilbert himself rejected. This essay argues that Francis Bacon (1561–1626) had already provided just the adaptations to Gilbert’s philosophy that the later thinkers adopted, including an important endorsement of action at a distance, and that he should be recognized as playing an important role in the movement.

  2. Elizabeth Wager. GETTING RESEARCH PUBLISHED – An A to Z of Publication Strategy, Third Edition. Boca Raton, New York, London: CRC Press, Taylor & Francis Group, LLC, 2015. 188 pages; ISBN-13:978-1-78523-138-4 (Paperback - CAT# K28669

    Doncho Donev

    2016-02-01

    CONCLUSION: The book is intended to help all authors, young and old, novice and experienced, to plan their research and publications effectively and prepare manuscripts for journals and other publications, increasing the likelihood that their work will be published. Providing essential information on publishing strategy and process, the book should be extremely useful to everyone who wants to publish research results.

  3. Elizabeth Wager. GETTING RESEARCH PUBLISHED – An A to Z of Publication Strategy, Third Edition. Boca Raton, New York, London: CRC Press, Taylor & Francis Group, LLC, 2015. 188 pages; ISBN-13:978-1-78523-138-4 (Paperback) - CAT# K28669

    Donev, Doncho

    2016-01-01

    PURPOSE: This book provides step-by-step guidance on developing a sound publication strategy for how to prepare and get research papers published. The book is a user-friendly guide, a route map for publishing that covers many topics, ranging from abstracts and blogs, tables and trial registration to ethical principles and conventions for writing scientific papers. Publishing the results of scientific research in the form of a scientific paper is the ultimate goal and the final stage of the re...

  4. Mandando bocas: Woo and Sex among Sampadjudu Young Men

    Francisco Miguel

    2016-11-01

    Full Text Available In this paper I deal with a Cape Verdean phenomenon: the mandar bocas (“to send mouths”. Specifically, I analyse the action of “mandar bocas” made by men in the town of Mindelo. At a first glance, this phenomenon could be quickly classified as “homophobic” slurs. I argue, however, that this is not the only possible interpretation of the phenomenon as “mandar bocas” is often a phase of a homoerotic courtship between young men in Cabo Verde, though permeated by masculinist signs.

  5. Development of 3He-BOCA power ramping facility, 1

    Nakata, Hirokatsu; Ishii, Tadahiko; Itoh, Haruhiko; Abe, Hiroshi; Nakazaki, Chozaburo

    1979-11-01

    Development of a He-3 power controlled boiling water capsule, 3 He-BOCS, for LWR fuels power ramping test in JMTR has been carried out since 1978 on a five-year program; in the reactor, irradiation tests of various fuels and structual materials have been made since 1969. Using stagnant-pressurized water as a thermal medium, the capsule provides pressure and temperature conditions similar to those in LWRs. Heat generation of a fuel pin can be controlled by a He-3 gas screen surrounding the capsule. The facility is capable of testing numbers of both fresh and irradiated fuel pins under LWR operating conditions for power ramping and cycling. After explaining the operating priciples of 3 He-BOCA and the development program, the following are described: the results of preliminary out-of-pile test on heat conductive characteristics of the capsule and a conceptual design of the 3 He-BOCA for power ramping of a short fuel pin from 250 W/cm to 500 W/cm under BWR conditions. (author)

  6. Poetic and Francis Bacon's Ambivalence toward Language.

    Pribble, Paula Tompkins

    Just as rhetoric is a way of knowing, so is poetic, both of which, for Francis Bacon, produce false knowledge. But Bacon is not entirely negative. When the poetic elements of language are used in strategic and public communication, like the scholarly communication Bacon attempts to reform, poetic and rhetoric work together to create a plurality of…

  7. La enfermedad de manos, pies y boca (Hand, Foot, and Mouth Disease)

    La enfermedad de manos, pies y boca es una enfermedad contagiosa que afecta principalmente a niños menores de cinco años. En este podcast, la doctora Eileen Schneider habla de los síntomas de la enfermedad de manos, pies y boca, cómo se propaga y cómo protegerse y proteger a sus hijos para que no se infecten con el virus.

  8. High genetic structure and low mitochondrial diversity in bottlenose dolphins of the Archipelago of Bocas del Toro, Panama: A population at risk?

    Barragán-Barrera, Dalia C; May-Collado, Laura J; Tezanos-Pinto, Gabriela; Islas-Villanueva, Valentina; Correa-Cárdenas, Camilo A; Caballero, Susana

    2017-01-01

    The current conservation status of the bottlenose dolphin (Tursiops truncatus) under the IUCN is 'least concern'. However, in the Caribbean, small and localized populations of the 'inshore form' may be at higher risk of extinction than the 'worldwide distributed form' due to a combination of factors including small population size, high site fidelity, genetic isolation, and range overlap with human activities. Here, we study the population genetic structure of bottlenose dolphins from the Archipelago of Bocas del Toro in Panama. This is a small population characterized by high site fidelity and is currently heavily-impacted by the local dolphin-watching industry. We collected skin tissue samples from 25 dolphins to study the genetic diversity and structure of this population. We amplified a portion of the mitochondrial Control Region (mtDNA-CR) and nine microsatellite loci. The mtDNA-CR analyses revealed that dolphins in Bocas del Toro belong to the 'inshore form', grouped with the Bahamas-Colombia-Cuba-Mexico population unit. They also possess a unique haplotype new for the Caribbean. The microsatellite data indicated that the Bocas del Toro dolphin population is highly structured, likely due to restricted movement patterns. Previous abundance estimates obtained with mark-recapture methods reported a small population of 80 dolphins (95% CI = 72-87), which is similar to the contemporary effective population size estimated in this study (Ne = 73 individuals; CI = 18.0 - ∞; 0.05). The combination of small population size, high degree of genetic isolation, and intense daily interactions with dolphin-watching boats puts the Bocas del Toro dolphin to at high risk of extinction. Despite national guidelines to regulate the dolphin-watching industry in Bocas del Toro and ongoing educational programs for tour operators, only in 2012 seven animals have died due to boat collisions. Our results suggest that the conservation status of bottlenose dolphins in Bocas del Toro

  9. High genetic structure and low mitochondrial diversity in bottlenose dolphins of the Archipelago of Bocas del Toro, Panama: A population at risk?

    Dalia C Barragán-Barrera

    Full Text Available The current conservation status of the bottlenose dolphin (Tursiops truncatus under the IUCN is 'least concern'. However, in the Caribbean, small and localized populations of the 'inshore form' may be at higher risk of extinction than the 'worldwide distributed form' due to a combination of factors including small population size, high site fidelity, genetic isolation, and range overlap with human activities. Here, we study the population genetic structure of bottlenose dolphins from the Archipelago of Bocas del Toro in Panama. This is a small population characterized by high site fidelity and is currently heavily-impacted by the local dolphin-watching industry. We collected skin tissue samples from 25 dolphins to study the genetic diversity and structure of this population. We amplified a portion of the mitochondrial Control Region (mtDNA-CR and nine microsatellite loci. The mtDNA-CR analyses revealed that dolphins in Bocas del Toro belong to the 'inshore form', grouped with the Bahamas-Colombia-Cuba-Mexico population unit. They also possess a unique haplotype new for the Caribbean. The microsatellite data indicated that the Bocas del Toro dolphin population is highly structured, likely due to restricted movement patterns. Previous abundance estimates obtained with mark-recapture methods reported a small population of 80 dolphins (95% CI = 72-87, which is similar to the contemporary effective population size estimated in this study (Ne = 73 individuals; CI = 18.0 - ∞; 0.05. The combination of small population size, high degree of genetic isolation, and intense daily interactions with dolphin-watching boats puts the Bocas del Toro dolphin to at high risk of extinction. Despite national guidelines to regulate the dolphin-watching industry in Bocas del Toro and ongoing educational programs for tour operators, only in 2012 seven animals have died due to boat collisions. Our results suggest that the conservation status of bottlenose dolphins in

  10. Comunidade de marca ou boca a boca eletrônico: qual o objetivo da presença de empresas em mídias sociais?

    Michel Lens Seller

    2018-02-01

    Full Text Available Resumo O uso crescente de mídias sociais vem alterando o relacionamento entre empresas e clientes. As mídias sociais abrem um canal de comunicação bidirecional entre a organização e seus consumidores, assim como promove a interação entre estes. De acordo com a literatura, são dois os objetivos perseguidos pelas empresas neste ambiente: aumento de confiança e lealdade à marca por meio de comunidades de marca; e influência na decisão de compra do cliente pela promoção de comunicação boca a boca positiva sobre seus produtos. O presente artigo estuda a abordagem utilizada por duas empresas (dos segmentos farmacêutico e de varejo de moda em suas fan pages no Facebook. Evidências de consciência comum e prática de rituais e tradições obtidas a partir de um estudo netnográfico revelam uma comunidade de marca na página da empresa farmacêutica. A análise de métricas de boca a boca eletrônico revela que o estímulo a esta forma de comunicação é o que busca a indústria de moda por meio de sua página. O estudo ainda discute mecanismos para estimular o boca a boca em fan pages e a presença de vínculos fracos como fator de engajamento de consumidores nesta prática. Implicações gerenciais, limitações e sugestões de pesquisas futuras são apresentadas ao final.

  11. Cavitation erosion prediction on Francis turbines

    Bourdon, P.; Farhat, M.; Simoneau, R.; Lavigne, P. [Hydro-Quebec, Montreal, PQ (Canada); Pereira, F.; Dupont, P.; Avellan, F.; Caron, J.F. [IMHEF/EPFL, (France); Dorey, J.M.; Archer, A. [Electricite de France (EDF), 92 - Clamart (France). Dir. des Etudes et Recherches; and others

    1997-12-31

    On-board aggressiveness measurement methods were tested on a severely eroded prototype blade of a 266 MW Francis turbine: pressure, pit counting, DECER electrochemical and vibration measurements. The test program provided understanding of the heterogeneous erosion distribution of the prototype blades and quantitative data for comparison in subsequent tests on the model of the machine. Model tests and flow analysis were also performed, to detect cavitation on a Francis turbine model. The results are compared to those obtained on the prototype measurements. The model used for that study is built on the basis of a geometrical recovery of one of the most eroded blade of the prototype. Different methods were investigated to predict cavitation erosion on Francis turbines from model. They are based on measurement of pitting, pressure fluctuations and acceleration. The methods proposed are suitable to measure cavitation aggressiveness on model and on prototype, and that the level on the model is several orders of magnitude smaller than on the prototype. (author) 18 refs.

  12. Homage to Francis Perrin - 1901-1992

    1994-05-01

    Francis Perrin had a brilliant and rapid career. He was a strict and honest man. He had a fast intelligence, a huge knowledge, he was faithful. Finally his courtesy and his generosity had made of him an outstanding and model personality very little known because of his extreme discretion. He lived his professional career (1920-1970) with passion. He thought that science might be one mankind heritage. He worked in CEA and played a crucial role in the CERN creation. He was an accomplished scientist since he tackled the mathematics, physics, and even chemistry scope. 52 refs

  13. Failure analysis of a Francis turbine runner

    Frunzaverde, D; Campian, V [Research Center in Hydraulics, Automation and Heat Transfer, ' Eftimie Murgu' University of Resita P-ta Traian Vuia 1-4, RO-320085, Resita (Romania); Muntean, S [Centre of Advanced Research in Engineering Sciences, Romanian Academy - Timisoara Branch Bv. Mihai Viteazu 24, RO-300223, Timisoara (Romania); Marginean, G [University of Applied Sciences Gelsenkirchen, Neidenburger Str. 10, 45877 Gelsenkirchen (Germany); Marsavina, L [Department of Strength, ' Politehnica' University of Timisoara, Bv. Mihai Viteazu 1, RO-300222, Timisoara (Romania); Terzi, R; Serban, V, E-mail: gabriela.marginean@fh-gelsenkirchen.d, E-mail: d.frunzaverde@uem.r [Ramnicu Valcea Subsidiary, S.C. Hidroelectrica S.A., Str. Decebal 11, RO-240255, Ramnicu Valcea (Romania)

    2010-08-15

    The variable demand on the energy market requires great flexibility in operating hydraulic turbines. Therefore, turbines are frequently operated over an extended range of regimes. Francis turbines operating at partial load present pressure fluctuations due to the vortex rope in the draft tube cone. This phenomenon generates strong vibrations and noise that may produce failures on the mechanical elements of the machine. This paper presents the failure analysis of a broken Francis turbine runner blade. The failure appeared some months after the welding repair work realized in situ on fatigue cracks initiated near to the trailing edge at the junction with the crown, where stress concentration occurs. In order to determine the causes that led to the fracture of the runner blade, the metallographic investigations on a sample obtained from the blade is carried out. The metallographic investigations included macroscopic and microscopic examinations, both performed with light and scanning electron microscopy, as well as EDX - analyses. These investigations led to the conclusion, that the cracking of the blade was caused by fatigue, initiated by the surface unevenness of the welding seam. The failure was accelerated by the hydrogen embrittlement of the filling material, which appeared as a consequence of improper welding conditions. In addition to the metallographic investigations, numerical computations with finite element analysis are performed in order to evaluate the deformation and stress distribution on blade.

  14. Failure analysis of a Francis turbine runner

    Frunzaverde, D; Campian, V; Muntean, S; Marginean, G; Marsavina, L; Terzi, R; Serban, V

    2010-01-01

    The variable demand on the energy market requires great flexibility in operating hydraulic turbines. Therefore, turbines are frequently operated over an extended range of regimes. Francis turbines operating at partial load present pressure fluctuations due to the vortex rope in the draft tube cone. This phenomenon generates strong vibrations and noise that may produce failures on the mechanical elements of the machine. This paper presents the failure analysis of a broken Francis turbine runner blade. The failure appeared some months after the welding repair work realized in situ on fatigue cracks initiated near to the trailing edge at the junction with the crown, where stress concentration occurs. In order to determine the causes that led to the fracture of the runner blade, the metallographic investigations on a sample obtained from the blade is carried out. The metallographic investigations included macroscopic and microscopic examinations, both performed with light and scanning electron microscopy, as well as EDX - analyses. These investigations led to the conclusion, that the cracking of the blade was caused by fatigue, initiated by the surface unevenness of the welding seam. The failure was accelerated by the hydrogen embrittlement of the filling material, which appeared as a consequence of improper welding conditions. In addition to the metallographic investigations, numerical computations with finite element analysis are performed in order to evaluate the deformation and stress distribution on blade.

  15. Francis Crick: A Singular Approach to Scientific Discovery.

    Lawrence, Peter A

    2016-12-01

    Francis' office window (at the Salk) commanded a panorama of the Pacific. "This grand natural scene was a physical correlate of Francis's intellectual world: wide-ranging, brilliantly lit, a little overawing, but also immensely inviting and above all an exciting place to be." (Mitchison, 2004). Copyright © 2016 Elsevier Inc. All rights reserved.

  16. Development of a 5kw Francis Turbine Runner Using Computation ...

    A small scale Francis turbine runner for a turbine located at Awba dam in the University of Ibadan with designed head and flow rate of 6m and 0.244m3/s is designed. The basic design of the Francis turbine runner is completed based on basic fluid dynamics turbo machinery principles. A 2-D and 3-D steady state, ...

  17. Omics: biomedical perspectives and applications

    Barh, Debmalya; Blum, Kenneth; Madigan, Margaret A

    2012-01-01

    ... by The MathWorks of a particular pedagogical approach or particular use of the MATLAB® software. CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 2012 by Taylor & Francis Group, LLC CRC Press is an imprint of Taylor & Francis Group, an Informa business No claim to original U.S. Government works Version ...

  18. Developing safety-critical software: a practical guide for aviation software and DO-178c compliance

    Rierson, Leanna

    2013-01-01

    ... of a particular pedagogical approach or particular use of the MATLAB® and Simulink® software. CRC Press Taylor & Francis Group 6000 Broken Sound Parkway NW, Suite 300 Boca Raton, FL 33487-2742 © 2013 by Taylor & Francis Group, LLC CRC Press is an imprint of Taylor & Francis Group, an Informa business No claim to original U.S. Government works Versi...

  19. Comunidade de marca ou boca a boca eletrônico: qual o objetivo da presença de empresas em mídias sociais?

    Michel Lens Seller; Fernando José Barbin Laurindo

    2018-01-01

    Resumo O uso crescente de mídias sociais vem alterando o relacionamento entre empresas e clientes. As mídias sociais abrem um canal de comunicação bidirecional entre a organização e seus consumidores, assim como promove a interação entre estes. De acordo com a literatura, são dois os objetivos perseguidos pelas empresas neste ambiente: aumento de confiança e lealdade à marca por meio de comunidades de marca; e influência na decisão de compra do cliente pela promoção de comunicação boca a boca...

  20. Assessing Attitude towards Religion: The Astley-Francis Scale of Attitude towards Theistic Faith

    Astley, Jeff; Francis, Leslie J.; Robbins, Mandy

    2012-01-01

    This study builds on the research tradition modelled by the Francis Scale of Attitude towards Christianity, the Katz-Francis Scale of Attitude towards Judaism, the Sahin-Francis Scale of Attitude towards Islam and the Santosh-Francis Scale of Attitude towards Hinduism to propose a generic instrument concerned with attitudes towards theistic faith.…

  1. Francis Goyat kuuleb pühapäeval

    2003-01-01

    Belgia kitarristist Francis Goyast, kontsertidest Pärnu kontserdimajas 19. nov., Tartus Vanemuise kontserdimajas 21.nov ja Tallinnas Estonia kontserdisaalis 23. nov., heliplaadist "Pleased to meet You, Mr. Valgre"

  2. Síndrome da boca ardente: etiologia Burning mouth syndrome: etiology

    Dafne Patrícia Cerchiari

    2006-06-01

    Full Text Available A Síndrome da Boca Ardente (SBA é caracterizada por dor na cavidade oral, com ou sem sinais inflamatórios, mas sem lesões específicas. Acomete geralmente mulheres na faixa etária entre 40 a 60 anos. A dor é do tipo queimação, de intensidade moderada a severa, sendo a língua o local mais acometido, podendo haver sensação dolorosa também em gengivas, lábios e mucosa jugal. Pode haver piora da intensidade dolorosa no decorrer do dia, nos estados de tensão, fadiga, ao falar muito, à ingestão de alimentos picantes e/ou quentes e melhora com alimentos frios, trabalho e distração. O objetivo desta revisão é contemplar as possíveis etiologias da SBA, agrupando-as em 4 grandes grupos para que melhor possam ser estudados: dor oral de causa local, sistêmica, emocional e idiopática. Sabendo dos diagnósticos diferenciais da síndrome, estabelecemos um protocolo para o manejo destes pacientes. Dentre as etiologias de dor bucal local, deve-se pesquisar as de causa dentária, alérgicas e infecciosas. Para as causas sistêmicas, pesquisar doenças do tecido conectivo, doenças endócrinas, neurológicas, deficiências nutricionais e as alterações das glândulas salivares que levam à xerostomia. A etiologia da SBA pode ser de difícil diagnóstico, muitas vezes com mais de um fator causando dor na boca. A realização de anamnese detalhada, exame físico geral, inspeção minuciosa da cavidade oral e orofaringe, além de exames laboratoriais são de fundamental importância, para evitar que o tratamento dos pacientes com esta síndrome, seja baseado em tentativa e erro.The Burning Month Syndrome (BMS is an oral mucosa pain - with or without inflammatory signs - without any specific lesion. It is mostly observed in women aged 40-60 years. This pain feels like a moderate/severe burning, and it occurs more frequently on the tongue, but it may also be felt at the gingiva, lips and jugal mucosa. It may worsen during the day, during stress

  3. Francis Bacon: “pintar sensações” (Francis Bacon: “to paint sensations”)

    Borges, Sonia; UVA

    2013-01-01

    RESUMO O texto aborda, pela via da psicanálise, o que consideramos como o “método” de Francis Bacon: “pintar sensações”. Para isto, tomo, como referências principais, a Carta 52 (1896), da correspondência de Freud com Fliess, e Em busca do tempo perdido, romance de Marcel Proust ([1922] 1995), observando a possibilidade de considerar o que Proust nomeia como “memória involuntária” e o seu papel no processo criativo como uma ilustração esclarecedora do que Freud nos traz na Carta sobre a estr...

  4. A POÉTICA DE FRANCIS BACON

    Sonia Borges

    2013-02-01

    Full Text Available A partir da perspectiva psicanalítica, a autora aborda a obra de Francis Bacon se utilizando de uma concepção estética que a reconhece como uma realidade ontológica. Dessa forma, considera que como obra de arte, são seus próprios elementos constitutivos, numa tensão interna, que são capazes de provocar efeitos ou as sensações que são o seu objetivo último conforme defendia Bacon. Em sua análise a autora examina e discute a dialética “tempo - espaço”, revelada pelo poeta pintor, como sendo de especial interesse para a clínica psicanalítica na medida em que esclarece importantes questões relativas ao Real como impossível, tal como o compreendeu Lacan. A pintura de Bacon examinada como referência à “sublimação criacionista da pulsão de morte” permite, segundo a autora, vislumbrarmos o para além da cadeia significante. Conclui que a arte, assim como a clínica psicanalítica, supõe deslocamentos subjetivos que implicam corte - rompimento com a tendência unificadora e pacificadora de Eros.

  5. HydroHillChart – Francis module. Software used to Calculate the Hill Chart of the Francis Hydraulic Turbines

    Dorian Nedelcu

    2015-07-01

    Full Text Available The paper presents the Hydro Hill Chart - Francis module application, used to calculate the hill chart of the Pelton, Francis and Kaplan hydraulic turbine models, by processing the data measured on the stand. After describing the interface and menu, the input data is graphically presented and the universal characteristic for measuring scenarios ao=const. and n11=const is calculated. Finally, the two calculated hill charts are compared through a graphical superimposition of the isolines.

  6. Measurement of pressure pulsations in Francis turbines

    Kobro, Einar

    2010-11-15

    The work presented in this thesis involves preparation and execution of measurements on Francis runners. The measurements were performed by means of onboard measuring equipment both in model runners and full-scale prototype runners. Also, analysis of the measured data, and the discussion of the results, is presented. The measurements resulted in large data sets. These data sets were used by the author to investigate the dynamic pressure and strain in the runners. The results of the analysis can be used as input in future turbine design. Andritz Hydro AG has used the data for verification of their numerical simulation tools. In connection with the refurbishment of Tokke power plant, two model runners were made available for onboard pressure measurements. To investigate the dynamic pressure in these runners, methods for integration of pressure transducers in the runner blades needed to be developed. After initial difficulties during the preparation, successful measurements were obtained from both model runners. At Tokke power plant, both the original and replacement runners were made accessible for onboard pressure and strain gauge measurements. On the original Kvaerner Brug AS runner, the test was prepared and performed by the author. This test failed, due to water intrusion in the logging chain. The second test was performed on the Andritz Hydro AG replacement runner. This test was prepared and performed by the author in close cooperation with Andritz Hydro AG, and the results were successful. The analysis results from both model and prototype runners show that the wake leaving the guide vanes is the most severe source of dynamic pressure in the runner. The draft tube vortex rope pulsation propagates upstream the runner, but does not appear as a significant frequency in the runner strain measurements. (Author)

  7. Energetic and exergetic analysis of combined cycle Energas Boca de Jaruco

    Dominguez, F. J.; Tapanez, A.; Castillo, E. del; Castillo, R.; Perez, R.

    2015-01-01

    The work shows the energy and exergy evaluation of the combined cycle Energas Boca de Jaruco, which consists of five gas turbines 30 MWh five heat recovery steam OTSGs type and a steam turbine of 150 MW. This evaluation is performed without additional burning and for different percentages of utilization of these burners. The results allow to have a criterion of the efficiency of the system with and without supplementary burned, which can define strategies most appropriate system operation. (full text)

  8. Variation in mangrove forest structure and sediment characteristics in Bocas del Toro, Panama

    Lovelock, C.E.; Feller, Ilka C.; McKee, K.L.; Thompson, R.

    2005-01-01

    Mangrove forest structure and sediment characteristics were examined in the extensive mangroves of Bocas del Toro, Republic of Panama. Forest structure was characterized to determine if spatial vegetation patterns were repeated over the Bocas del Toro landscape. Using a series of permanent plots and transects we found that the forests of Bocas del Toro were dominated by Rhizophora mangle with very few individuals of Avicennia germinans and Laguncularia racemosa. Despite this low species diversity, there was large variation in forest structure and in edaphic conditions (salinity, concentration of available phosphorus, Eh and sulphide concentration). Aboveground biomass varied 20-fold, from 6.8 Mg ha-1 in dwarf forests to 194.3 Mg ha-1 in the forests fringing the land. But variation in forest structure was predictable across the intertidal zone. There was a strong tree height gradient from seaward fringe (mean tree height 3.9 m), decreasing in stature in the interior dwarf forests (mean tree height 0.7 m), and increasing in stature in forests adjacent to the terrestrial forest (mean tree height 4.1 m). The predictable variation in forest structure emerges due to the complex interactions among edaphic and plant factors. Identifying predictable patterns in forest structure will aid in scaling up the ecosystem services provided by mangrove forests in coastal landscapes. Copyright 2005 College of Arts and Sciences.

  9. Numerical Study of a High Head Francis Turbine with Measurements from the Francis-99 Project

    Wallimann, H; Neubauer, R

    2015-01-01

    For the Francis-99 project initiated by the Norwegian University of Science and Technology (NTNU, Norway) and the Luleå University of Technology (LTU, Sweden) numerical flow simulation has been performed and the results compared to experimentally obtained data. The full machine including spiral casing, stay vanes, guide vanes, runner and draft tube was simulated transient for three operating points defined by the Francis-99 organisers. Two sets of results were created with differing time steps. Additionally, a reduced domain was simulated in a stationary manner to create a complete cut along constant prototype head and constant prototype discharge. The efficiency values and shape of the curves have been investigated and compared to the experimental data. Special attention has been given to rotor stator interaction (RSI). Signals from several probes and their counterpart in the simulation have been processed to evaluate the pressure fluctuations occurring due to the RSI. The direct comparison of the hydraulic efficiency obtained by the full machine simulation compared to the experimental data showed no improvement when using a 1° time step compared to a coarser 2° time step. At the BEP the 2° time step even showed a slightly better result with an absolute deviation 1.08% compared with 1.24% for the 1° time step. At the other two operating points the simulation results were practically identical but fell short of predicting the measured values. The RSI evaluation was done using the results of the 2° time step simulation, which proved to be an adequate setting to reproduce pressure signals with peaks at the correct frequencies. The simulation results showed the highest amplitudes in the vaneless space at the BEP operating point at a location different from the probe measurements available. This implies that not only the radial distance, but the shape of the vaneless space influences the RSI

  10. On Francis Crick, the genetic code, and a clever kid.

    Goldstein, Bob

    2018-04-02

    A few years ago, Francis Crick's son told me a story that I can't get out of my mind. I had contacted Michael Crick by email while digging through the background of the researchers who had cracked the genetic code in the 1960s. Francis had died in 2004, and I was contacting some of the people who knew him when he was struggling to decipher the code. Francis didn't appear to struggle often - he is known mostly for his successes - and, as it turns out, this one well-known struggle may have had a clue sitting just barely out of sight. Copyright © 2018 Elsevier Ltd. All rights reserved.

  11. Verdade e método em Francis Bacon

    Secco, Márcio

    2004-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas. Programa de Pós-Graduação em Filosofia. Estudo sobre o método e o conceito de verdade defendido por Francis Bacon, sendo nossos principais objetivos nesse trabalho: a) esclarecer algumas questões relativas ao método baconiano, principalmente no que se refere ao uso de hipóteses; b) apresentar uma interpretação falibilista da teoria de Francis Bacon, mostrando que a verdade e a utilidade...

  12. "Handbook of biomedical optics", edited by David A. Boas, Constantinos Pitris, and Nimmi Ramanujam

    2012-01-01

    David A. Boas, Constantinos Pitris, and Nimmi Ramanujam, Eds.: Handbook of Biomedical Optics CRC Press, Taylor and Francis Group, Boca Raton, London, New York, 2011 ISBN: 978-1-4200-9036-9 (Hardback), 787 pages

  13. Book review: Reptiles and amphibians: Self-assessment color review

    Green, David E.

    2017-01-01

    No abstract available.Book information: Reptiles and Amphibians: Self-Assessment Color Review. 2nd Edition. By Fredric L. Frye. CRC Press, Taylor and Francis Group, Boca Raton, Florida USA. 2015. 252 pp. ISBN 9781482257601.

  14. Francis Bacon and the Historiography of Scientific Rhetoric.

    Zappen, James P.

    1989-01-01

    Reviews three twentieth-century interpretations of Francis Bacon's science and rhetoric: positivistic science and the plain style; institutionalized science and its more highly figured style; and democratic science. Presents the author's own interpretation, and concludes that each interpretation reflects different perceptions of the good of the…

  15. 60 years ago, Francis Crick changed the logic of biology.

    Matthew Cobb

    2017-09-01

    Full Text Available In September 1957, Francis Crick gave a lecture in which he outlined key ideas about gene function, in particular what he called the central dogma. These ideas still frame how we understand life. This essay explores the concepts he developed in this influential lecture, including his prediction that we would study evolution by comparing sequences.

  16. 60 years ago, Francis Crick changed the logic of biology

    2017-01-01

    In September 1957, Francis Crick gave a lecture in which he outlined key ideas about gene function, in particular what he called the central dogma. These ideas still frame how we understand life. This essay explores the concepts he developed in this influential lecture, including his prediction that we would study evolution by comparing sequences. PMID:28922352

  17. Scientific Cousins: The Relationship between Charles Darwin and Francis Galton

    Fancher, Raymond E.

    2009-01-01

    This article traces the personal as well as the intellectual and scientific relationship between Charles Darwin and his younger half-cousin Francis Galton. Although they had been on friendly terms as young men, and Darwin had in some ways been a role model for Galton, the two did not share major scientific interests until after the publication of…

  18. Master equation and runaway speed of the Francis turbine

    Zhang, Zh.

    2018-04-01

    The master equation of the Francis turbine is derived based on the combination of the angular momentum (Euler) and the energy laws. It relates the geometrical design of the impeller and the regulation settings (guide vane angle and rotational speed) to the discharge and the power output. The master equation, thus, enables the complete characteristics of a given Francis turbine to be easily computed. While applying the energy law, both the shock loss at the impeller inlet and the swirling loss at the impeller exit are taken into account. These are main losses which occur at both the partial load and the overloads and, thus, dominantly influence the characteristics of the Francis turbine. They also totally govern the discharge of the water through the impeller when the impeller is found in the standstill. The computations have been performed for the discharge, the hydraulic torque and the hydraulic efficiency. They were also compared with the available measurements on a model turbine. Excellent agreement has been achieved. The computations also enable the runaway speed of the Francis turbine and the related discharge to be determined as a function of the setting angle of the guide vanes.

  19. Sunrayce 97 Continues Day 7 - Smith Center to St. Francis

    Manager (202) 586-0713 St. Francis, Kan. -- It was a close race for the top three places on the 7th day of running great. It's a solid car. We may not have the fastest or most efficient vehicle in the race, but we withdraw from the race yesterday due to suspension problems. The team was presented an "Inspector's

  20. 60 years ago, Francis Crick changed the logic of biology.

    Cobb, Matthew

    2017-09-01

    In September 1957, Francis Crick gave a lecture in which he outlined key ideas about gene function, in particular what he called the central dogma. These ideas still frame how we understand life. This essay explores the concepts he developed in this influential lecture, including his prediction that we would study evolution by comparing sequences.

  1. Stability of the Spanish version of the five-item Francis Scale of Attitude toward Christianity.

    Miranda-Tapia, Giskar Alonso; Cogollo, Zuleima; Herazo, Edwin; Campo-Arias, Adalberto

    2010-12-01

    The aim of this study was to establish test-retest reliability of a Spanish version of the Francis Scale of Attitude toward Christianity (Campo-Arias, Oviedo, & Cogollo, 2009) among adolescent students in Cartagena, Colombia. A group of ninth grade students from two public schools in Colombia (N = 157) completed the five-item scale. Cronbach's alphas were .74 and .76 in the first and second administrations, respectively. Both Pearson's rho and intra-class correlation coefficient were .69. A Spanish translation of the 5-item scale had consistent stability over four weeks.

  2. Abordaje “pull through” para tumores de suelo de boca que requieran RT adyuvante

    Pablo Crespo Escudero

    2018-05-01

    Full Text Available INTRODUCCION:   - Los tumores malignos de suelo de boca, en estadios avanzados  (T3 y T4,  suponen un reto quirúrgico a la hora de disminuir la morbilidad de la cirugía.-        Una gran mayoría de las veces, la radioterapia forma parte del tratamiento adyuvante, suponiendo un riesgo para la aparición de osteoradionecrosis postquirurgica en pacientes que han precisado mandibulotomías en su abordaje.-        La diabetes, consumo de alcohol, tabaquismo y edad avanzada y exodoncias post radioterapia son factores de riesgo para la osteoradionecrosis.-        En la osteoradionecrosis se generan unos cambios en el hueso conocidos como la triple H (ver foto triple H: tejido hipocelular, hipóxico e hipovascular. MATERIAL Y METODOS: -        Paciente de 76 años, diabético en tratamiento con antidiabéticos orales, edéntulo, con arterioresclerosis de años de evolución presenta una masa en suelo de boca de nueva aparición.-        EXPLORACION:-        masa en suelo de boca de unos 3,5 x 3 cm que NO INFILTRA cortical mandibular.-        La motilidad de la lengua parece estar limitada en su lateralización hacia la derecha.-        LA FIBROSCOPIA es rigurosamente normal.-        Se palpan adenopatías en areas I-II-III izquierdas claramente patológicas. -        El PET-TAC: LESIÓN HIPERMETABÓLICA con Suv de 22,67, de 3 x 3 x 2,1 cm, en suelo de boca que no contacta con proceso alveolar hamimandibular, y que invade musculatura milohioidea; presenta 2 adenopatias patológicas izquierdas en area IIa y IIb ipsilaterales a la lesión; TAC torácico: nódulo pulmonar solitario que puede corresponder a patología inflamatoria.-        Se realiza toma de biopsia: carcinoma epidermoide moderadamente diferenciado; VPH: negativo.-        Ante el estadiaje tumoral y los antecedentes del paciente se realiza abordaje “pull through” con exposición total de la

  3. Major historical developments in the design of water wheels and Francis hydroturbines

    Lewis, B J; Cimbala, J M; Wouden, A M

    2014-01-01

    The first record of water wheels dates back to ancient Greece. Over the next several centuries the technology spread all over the world. The process of arriving at the design of the modern Francis runner lasted from 1848 to approximately 1920. Though the modern Francis runner has little resemblance to the original turbines designed by James B. Francis in 1848, it became know as the Francis turbine around 1920, in honor of his many contributions to hydraulic engineering analysis and design. The modern Francis turbine is the most widely used turbine design today, particularly for medium head and large flow rate situations, and can achieve over 95% efficiency

  4. The Ethics of Drone Strikes: Does Reducing the Cost of Conflict Encourage War?

    2015-09-01

    62-77; Ronald C. Arkin, Governing Lethal Behavior in Autonomous Robots, Boca Raton, FL: Taylor & Francis Group, 2009; Armin Krishnan, Killer...Governing Lethal Behavior in Autonomous Robots, Boca Raton, FL: Taylor & Francis Group, 2009; Strawser, “Moral Predators,” pp. 342-368; Marcus...Our Army Ethic,” Military Review: The Army Ethic, 2010, pp. 3-10; Jeffrey Wilson, “An Ethics Curricu- lum for an Evolving Army,” Paul Robinson, Nigel

  5. Enfermedad de mano, pie y boca en un hospital del Callao, 2016

    Milton José Max Rodríguez-Zúñiga

    Full Text Available La enfermedad de mano, pie y boca (EMPB es una enfermedad exantemática viral, causada principalmente por Coxsackie A16, con una sintomatología típica consistente en fiebre; exantema pápulo-vesicular en manos, pies y genitales; y un enantema ulceroso en boca. En el verano del 2016 se presentó una diversidad de casos en un hospital del Callao en niños y adultos, con una sintomatología compatible con EMPB; el diagnóstico fue clínico, se aplicó terapia de soporte con resolución final de síntomas. En la última década se han presentado reportes en algunos países con una afectación atípica causada por el Coxsackie A6, produciendo lesiones más extensas y en adultos. Sin embargo, el diagnóstico sigue siendo clínico, solo necesitando confirmación virológica en casos atípicos o cuando el diagnóstico no es claro. La importancia de este reporte radica en describir los casos del Callao ocurridos en el verano del 2016, para servir de apoyo a los profesionales de la salud en el diagnóstico y manejo de pacientes con similar sintomatología.

  6. Dasymetric high resolution population distribution estimates for improved decision making, with a case study of sea-level rise vulnerability in Boca Raton, Florida

    Ziegler, Hannes Moritz

    Planners and managers often rely on coarse population distribution data from the census for addressing various social, economic, and environmental problems. In the analysis of physical vulnerabilities to sea-level rise, census units such as blocks or block groups are coarse relative to the required decision-making application. This study explores the benefits offered from integrating image classification and dasymetric mapping at the household level to provide detailed small area population estimates at the scale of residential buildings. In a case study of Boca Raton, FL, a sea-level rise inundation grid based on mapping methods by NOAA is overlaid on the highly detailed population distribution data to identify vulnerable residences and estimate population displacement. The enhanced spatial detail offered through this method has the potential to better guide targeted strategies for future development, mitigation, and adaptation efforts.

  7. Francis Bacon: The Real's Brutality. The Figure and the Other

    Guido Mannucci

    2014-03-01

    Full Text Available Getting in front of painting by Francis Bacon touches you deeply. I’m talking about aesthetics, sensations: resounding flow that strikes abruptly, making futile any search for meaning. Francis Bacon circumvents the figurative, the meaning, he aims to the figural: to feelings, not words. Beauty, in his paintings, shows itself in the peaceful union of the positive and of its contrary; if the negative wasn’t there, though, his paintings wouldn’t exude such a brutal sense of reality. This essay investigates the figure of Francis Bacon and the spectator – the Other – as he tries to confront the painting. Bacon will be analysed using a purely phenomenological approach, with references that range from Merleau-Ponty to Martin Heidegger; the meeting-collision between the spectator and the painting, instead, will be examined taking inspiration from the Winnicott’s thesis on the relationship between Bacon and mirrors in the painter’s childhood. In order to take distance from Winnicott’s psychoanalytical approach, this essay will focus on the relationship between spectator and painting from a more anthropological point of view. 

  8. "En la boca de las nubes" (A la boca dels núvols y con los pies en el suelo. Ramon Vinyes: contra la literatura, la vida

    Jordi Marrugat i Doménech

    2005-01-01

    Full Text Available Este artículo propone una lectura unitaria del volumen de narraciones de Ramon Vinyes En la boca de las nubes (1946. Además, va a las fuentes de las cuales surge la estética del libro —la narrativa catalana y europea de los años 20-30 y el pensamiento teórico de Vinyes— para explicar como el autor decadentista de La ardiente cabalgata (1909 acaba por escribir un libro tan alejado de los posicionamientos que había mantenido durante el Modernismo. Y es que si en 1909 Vinyes decantaba la balanza de la dicotomía artevida hacia el primero de estos términos, en 1946, después de haber vivido una guerra civil y dos guerras mundiales, la decanta radicamente hacia el segundo. Así, el lector podrá encontrar sugestivas comparaciones entre Vinyes y escritores como T. Gautier, Villiers de l’Isle-Adam, Gabriele d’Annunzio o Gabriel Alomar por lo que se refiere a su época modernista; entre Vinyes y Malraux, Saint-Exupéry, V. Woolf, Joan Oliver o Salvador Espriu, por lo que se refiere a los años 30; y entre Vinyes i Pere Calders o Lluís Ferran de Pol, por lo que se refiere al exilio

  9. Fatores dentais como risco para o desenvolvimento de carcinoma epidermóide de boca

    Abdo, Evandro Neves; Pordeus, Isabela Almeida; Gomez, Ricardo Santiago; Mesquita, Ricardo Alves

    2016-01-01

    Os autores apresentam uma revisão da literatura sobre a participação dos fatores dentais como risco para o desenvolvimento do carcinoma epidermóide de boca (CEB). O uso de próteses removíveis não tem sido correlacionado como risco. A participação de bordas irritantes de dentes e próteses removíveis não foicomprovada na literatura. Embora a má higiene bucal seja considerada como risco, a literatura considera como pouco expressiva em relação ao uso do fumo e álcool. Novos estudos são necessário...

  10. Decadal increase in seagrass biomass and temperature at the CARICOMP site in Bocas del Toro, Panama

    Jorge M. López-Calderón

    2013-12-01

    Full Text Available The Caribbean Coastal Marine Productivity Program (CARICOMP was launched in 1993 to study regional long-term interactions between land and sea, taking standardized measurements of productivity and biomass of mangroves, coral reefs and seagrasses. Since 1999 continuous measurements of seagrass (Thalassia testudinum parameters as well as environmental data have been recorded in Caribbean Panama. Replicate stations were selected near the Smithsonian Tropical Research Institute in Bocas del Toro. Sediment cores and quadrants were placed there to estimate biomass and productivity, respectively. Mean values for productivity, standing crop, turnover rate, total dry biomass, and Leaf Area Index were 1.74gDW/m²/d, 66.6gDW/m², 2.62%/d, 1 481 gDW/m², and 4.65, respectively. Total dry biomass (shoots, rhizomes and roots and LAI of T. testudinum increased significantly during the study period. Mean values for total rainfall, Secchi disk depth, sea surface temperature, and salinity were 3 498mm, 8.24m, 28.79°C, and 32.26psu, respectively. Sea surface temperature was the only environmental variable with a statistically significant change, increasing from 1999 to 2010. Correlation between sea surface temperature and T. testudinum parameters (total biomass and LAI were both positive and significant. Human population has increased dramatically over the last ten years in Bocas del Toro region, increasing pressure (deforestation, runoff, wastewater over coastal ecosystems (seagrasses, mangroves, coral reefs. Change in the abundance of T. testudinum may be linked to ocean warming, as a consequence to satisfy plant’s metabolic requirements, although other local factors need to be analyzed (reduced grazing and increased eutrophication. A further warming of the ocean could have a negative effect on T. testudinum population, increasing respiratory demands and microbial metabolism.

  11. Assessing the ecological effects of human impacts on coral reefs in Bocas del Toro, Panama.

    Seemann, Janina; González, Cindy T; Carballo-Bolaños, Rodrigo; Berry, Kathryn; Heiss, Georg A; Struck, Ulrich; Leinfelder, Reinhold R

    2014-03-01

    Environmental and biological reef monitoring was conducted in Almirante Bay (Bahía Almirante) in Bocas del Toro, Panama, to assess impacts from anthropogenic developments. An integrated monitoring investigated how seasonal temperature stress, turbidity, eutrophication and physical impacts threatened reef health and biodiversity throughout the region. Environmental parameters such as total suspended solids [TSS], carbon isotopes (δ(13)C), C/N ratios, chlorophyll a, irradiance, secchi depth, size fractions of the sediments and isotope composition of dissolved inorganic carbon [DIC] of the water were measured throughout the years 2010 and 2011 and were analysed in order to identify different impact sources. Compared to data from Collin et al. (Smithsonian Contributions to the Marine Sciences 38:324-334, 2009) chlorophyll a has doubled at sites close to the city and the port Almirante (from 0.46-0.49 to 0.78-0.97 μg l(-1)) and suspension load increased, visible by a decrease in secchi depth values. Visibility decreased from 9-13 m down to 4 m at the bay inlet Boca del Drago, which is strongly exposed to river run off and dredging for the shipping traffic. Eutrophication and turbidity levels seemed to be the determining factor for the loss of hard coral diversity, most significant at chlorophyll a levels higher than 0.5 μg l(-1) and TSS levels higher than 4.7 mg l(-1). Hard coral cover within the bay has also declined, at some sites down to turbidity and eutrophication compared to other hard coral species in the bay. Serious overfishing was detected in the region by a lack of adult and carnivorous fish species, such as grunts, snappers and groupers. Study sites less impacted by anthropogenic activities and/or those with local protection showed a higher hard coral cover and fish abundance; however, an overall loss of hard coral diversity was observed.

  12. Cost of enlarged operating zone for an existing Francis runner

    Monette, Christine; Marmont, Hugues; Chamberland-Lauzon, Joël; Skagerstrand, Anders; Coutu, André; Carlevi, Jens

    2016-11-01

    Traditionally, hydro power plants have been operated close to best efficiency point, the more stable operating condition for which they have been designed. However, because of changes in the electricity market, many hydro power plants operators wish to operate their machines differently to fulfil those new market needs. New operating conditions can include whole range operation, many start/stops, extensive low load operation, synchronous condenser mode and power/frequency regulation. Many of these new operating conditions may impose more severe fatigue damage than the traditional base load operation close to best efficiency point. Under these conditions, the fatigue life of the runner may be significantly reduced and reparation or replacement cost might occur sooner than expected. In order to design reliable Francis runners for those new challenging operating scenarios, Andritz Hydro has developed various proprietary tools and design rules. These are used within Andritz Hydro to design mechanically robust Francis runners for the operating scenarios fulfilling customer's specifications. To estimate residual life under different operating scenarios of an existing runner designed years ago for best efficiency base load operation, Andritz Hydro's design rules and tools would necessarily lead to conservative results. While the geometry of a new runner can be modified to fulfil all conservative mechanical design rules, the predicted fatigue life of an existing runner under off-design operating conditions may appear rather short because of the conservative safety factor included in the calculations. The most precise and reliable way to calculate residual life of an existing runner under different operating scenarios is to perform a strain gauge measurement campaign on the runner. This paper presents the runner strain gage measurement campaign of a mid-head Francis turbine over all the operating conditions available during the test, the analysis of the measurement signals

  13. Design of large Francis turbine using optimal methods

    Flores, E.; Bornard, L.; Tomas, L.; Liu, J.; Couston, M.

    2012-11-01

    Among a high number of Francis turbine references all over the world, covering the whole market range of heads, Alstom has especially been involved in the development and equipment of the largest power plants in the world : Three Gorges (China -32×767 MW - 61 to 113 m), Itaipu (Brazil- 20x750 MW - 98.7m to 127m) and Xiangjiaba (China - 8x812 MW - 82.5m to 113.6m - in erection). Many new projects are under study to equip new power plants with Francis turbines in order to answer an increasing demand of renewable energy. In this context, Alstom Hydro is carrying out many developments to answer those needs, especially for jumbo units such the planned 1GW type units in China. The turbine design for such units requires specific care by using the state of the art in computation methods and the latest technologies in model testing as well as the maximum feedback from operation of Jumbo plants already in operation. We present in this paper how a large Francis turbine can be designed using specific design methods, including the global and local optimization methods. The design of the spiral case, the tandem cascade profiles, the runner and the draft tube are designed with optimization loops involving a blade design tool, an automatic meshing software and a Navier-Stokes solver, piloted by a genetic algorithm. These automated optimization methods, presented in different papers over the last decade, are nowadays widely used, thanks to the growing computation capacity of the HPC clusters: the intensive use of such optimization methods at the turbine design stage allows to reach very high level of performances, while the hydraulic flow characteristics are carefully studied over the whole water passage to avoid any unexpected hydraulic phenomena.

  14. Design of large Francis turbine using optimal methods

    Flores, E; Bornard, L; Tomas, L; Couston, M; Liu, J

    2012-01-01

    Among a high number of Francis turbine references all over the world, covering the whole market range of heads, Alstom has especially been involved in the development and equipment of the largest power plants in the world : Three Gorges (China −32×767 MW - 61 to 113 m), Itaipu (Brazil- 20x750 MW - 98.7m to 127m) and Xiangjiaba (China - 8x812 MW - 82.5m to 113.6m - in erection). Many new projects are under study to equip new power plants with Francis turbines in order to answer an increasing demand of renewable energy. In this context, Alstom Hydro is carrying out many developments to answer those needs, especially for jumbo units such the planned 1GW type units in China. The turbine design for such units requires specific care by using the state of the art in computation methods and the latest technologies in model testing as well as the maximum feedback from operation of Jumbo plants already in operation. We present in this paper how a large Francis turbine can be designed using specific design methods, including the global and local optimization methods. The design of the spiral case, the tandem cascade profiles, the runner and the draft tube are designed with optimization loops involving a blade design tool, an automatic meshing software and a Navier-Stokes solver, piloted by a genetic algorithm. These automated optimization methods, presented in different papers over the last decade, are nowadays widely used, thanks to the growing computation capacity of the HPC clusters: the intensive use of such optimization methods at the turbine design stage allows to reach very high level of performances, while the hydraulic flow characteristics are carefully studied over the whole water passage to avoid any unexpected hydraulic phenomena.

  15. Transient CFD simulation of a Francis turbine startup

    Nicolle, J; Morissette, J F; Giroux, A M

    2012-01-01

    To assess the life expectancy of hydraulic turbines, it is essential to obtain the loading on the blades, especially during transient operations known to be the most damaging. This paper presents a simplified CFD setup to model the startup phase of a Francis turbine while it goes from rest to speed no-load condition. The fluid domain included one distributor sector coupled with one runner passage. The guide vane motion and change in the angular velocity were included in a commercial code with user functions. Comparisons between numerical results and measurements acquired on a full-size turbine showed that most of the flow physics occurring during startup were captured.

  16. First record of the neotropical otter Lontra longicaudis annectens (Carnivora, Mustelidae in the estuary Boca Negra, Jalisco, Mexico: an approach to understanding its diet.

    Rodríguez-Uribe, M.C.

    2015-01-01

    Full Text Available The first record of the neotropical otter Lontra longicaudis annectens in the estuary Boca Negra, Jalisco, Mexico is presented. It includes relevant information about its diet and a photograph in its natural habitat is showed.

  17. Efficiency limit factor analysis for the Francis-99 hydraulic turbine

    Zeng, Y.; Zhang, L. X.; Guo, J. P.; Guo, Y. K.; Pan, Q. L.; Qian, J.

    2017-01-01

    The energy loss in hydraulic turbine is the most direct factor that affects the efficiency of the hydraulic turbine. Based on the analysis theory of inner energy loss of hydraulic turbine, combining the measurement data of the Francis-99, this paper calculates characteristic parameters of inner energy loss of the hydraulic turbine, and establishes the calculation model of the hydraulic turbine power. Taken the start-up test conditions given by Francis-99 as case, characteristics of the inner energy of the hydraulic turbine in transient and transformation law are researched. Further, analyzing mechanical friction in hydraulic turbine, we think that main ingredients of mechanical friction loss is the rotation friction loss between rotating runner and water body, and defined as the inner mechanical friction loss. The calculation method of the inner mechanical friction loss is given roughly. Our purpose is that explore and research the method and way increasing transformation efficiency of water flow by means of analysis energy losses in hydraulic turbine.

  18. The green roof dilemma - discussion of Francis and Lorimer (2011).

    Henry, Alexandre; Frascaria-Lacoste, Nathalie

    2012-08-15

    Urban ecosystems are the most complex mosaics of vegetative land cover that can be found. In a recent paper, Francis and Lorimer (2011) evaluated the reconciliation potential of living roofs and walls. For these authors, these two techniques for habitat improvement have strong potential for urban reconciliation ecology. However they have some ecological and societal limitations such as the physical extreme environmental characteristics, the monetary investment and the cultural perceptions of urban nature. We are interested in their results and support their conclusions. However, for a considerable time, green roofs have been designed to provide urban greenery for buildings and the green roof market has only focused on extensive roof at a restricted scale within cities. Thus, we have strong doubts about the relevance of their use as possible integrated elements of the network. Furthermore, without dynamic progress in research and the implementation of well-thought-out policies, what will be the real capital gain from green roofs with respect to land-use complementation in cities? If we agree with Francis and Lorimer (2011) considering that urban reconciliation ecology between nature and citizens is a current major challenge, then "adaptive collaborative management" is a fundamental requirement. Copyright © 2012 Elsevier Ltd. All rights reserved.

  19. LDA measurements in the Francis-99 draft tube cone

    Sundstrom, L R J; Amiri, K; Cervantes, M J; Bergan, C; Dahlhaug, O G

    2014-01-01

    Velocity measurements were performed in the draft tube cone of a 1:5.1 scaled model of the Tokke hydropower plant, Norway; also known as the Francis-99 model. Results from the laser Doppler anemometry measurements undertaken at three operating points will be used as validation data for an upcoming workshop on the state of the art of Francis turbine numerical simulation. With the turbine operating at the best efficiency point, a sensitivity analysis of the flow parameters head, flow rate and runner rotational speed shows that the effects on the dimensionless velocity profiles are small as long as n ED and Q ED are held constant. The results indicate a well-functioning turbine at the best efficiency point and high load. At the part load operating point, a vortex breakdown occurs which distorts the velocity profiles and significantly lowers the turbine's hydraulic efficiency. Frequency spectrums of each LDA signal at part load reveals a peak which is asynchronous to that of the runner angular speed. The peaks might be related to the precession of a rotating vortex rope but the characteristics of the LDA signals are different compared to previous studies involving rotating vortex ropes

  20. The Second Christ, Saint Francis of Assisi and ecological consciousness

    Hendrik Viviers

    2014-01-01

    Full Text Available Even though the life stories of Jesus and the so-called second Christ, Francis of Assisi, incline to the fantastical, their value for a modern ecological consciousness is defendable. Behind Francis� personification of nature and his mystical experiences of nature lie an intuitive sense of interconnectedness and interdependence, of being fully part of the natural web of life (confirmed by empirical science. The same is true of the immanence of Jesus. Religious figures like Francis and Jesus can provide a sound moral attitude towards caring for the natural world, but attitudes need to be informed by scientific knowledge to act ecologically correct. A partnership between attitudes and knowledge hopefully contains good news for a sustainable �green� planet.Intradisciplinary and/or�interdisciplinary�implications: Ecological hermeneutics (part of liberation theology or hermeneutics challenges traditional theologies� often anthropocentric bias in the intra-disciplinary arena. It respects the interconnectedness or interdependence of human and non-human life, including the non-organic, empirically substantiated by natural science. This shared realisation allows for a fruitful inter-disciplinary discourse with science to address the global ecological crisis.

  1. Effect of Guide Vane Clearance Gap on Francis Turbine Performance

    Ravi Koirala

    2016-04-01

    Full Text Available Francis turbine guide vanes have pivoted support with external control mechanism, for conversion of pressure to kinetic energy and to direct them to runner vanes. This movement along the support is dependent on variation of load and flow (operating conditions. Small clearance gaps between facing plates and the upper and lower guide vane tips are available to aid this movement, through which leakage flow occurs. This secondary flow disturbs the main flow stream, resulting performance loss. Additionally, these increased horseshoe vortex, in presence of sand, when crosses through the gaps, both the surfaces are eroded. This causes further serious effect on performance and structural property by increasing gaps. This paper discusses the observation of the severity in hydropower plants and effect of clearance gaps on general performance of the Francis turbine through computational methods. It also relates the primary result with the empirical relation for leakage flow prediction. Additionally, a possible method to computationally estimate thickness depletion has also been presented. With increasing clearance gap, leakage increases, which lowers energy conversion and turbine efficiency along with larger secondary vortex.

  2. Textura, materia orgánica y composición química elemental (C y N de sedimentos marinos superficiales de la zona Puerto Montt a Boca del Guafo (Norpatagonia chilena Grain size, total organic matter, organic carbon, inorganic carbon and organic nitrogen in surface marine sediments from Puerto Montt to Boca del Guafo (Chilean North Patagonia

    Nelson Silva

    2010-01-01

    Full Text Available Se determinó la distribución horizontal de la textura, concentración de materia orgánica, carbono orgánico e inorgánico y nitrógeno orgánico, del sedimento en muestras superficiales, recolectadas entre Puerto Montt y Boca del Guafo, durante los cruceros CIMAR 10 Fiordos (2004, CIMAR 11 Fiordos (2005 y CIMAR 12 Fiordos (2006. La distribución superficial de las características químicas permitió identificar dos zonas: una norte, entre Puerto Montt y el grupo de islas Desertores-Apiao-Quehui-Lemuy con concentraciones, que en general fueron altas (MOT > 5%, C-org > 1,6%, C-inorg >0,4% y N-org > 0,2%, y una sur, entre dicho grupo de islas y la Boca del Guafo con concentraciones, en general, bajas (MOT 7,5%, C-org >2,4%, C-inorg >0,4% y N-org >0,2%. La textura de las muestras marinas fue arenosa y limo-arcillosa, siendo la presencia de grava escasa e inferior al 4% en algunas muestras. El sedimento terrígeno del borde de los ríos fue preferentemente arenoso. La procedencia del sedimento (marino versus terrígeno se infirió sobre la base de los valores de la relación C:N. Este resultó ser, mayoritariamente de origen marino, con la excepción de los fiordos continentales en que la componente terrígena fue importante.The horizontal distribution of the organic matter, organic and inorganic carbon, organic nitrogen content, and surface sediment texture was determined between Puerto Montt and Boca del Guafo using samples collected during the cruises CIMAR 10 Fiordos (2004, CIMAR 11 Fiordos (2005 and CIMAR 12 Fiordos (2006. Two zones were identified: the northern zone (from Puerto Montt to the Desertores-Apiao-Quehui-Lemuy island group had mostly high concentrations (TOM >5%; C-org >1.6%; C-inorg >0.4% and N-org > 0.2% the southern zone (from the same island group to Boca del Guafo had mostly low concentrations (TOM 7.5%, C-org > 2.4%, C-inorg > 0.4% and N-org > 0.2%. The texture of the marine sediments was mostly sand and silt + clay

  3. Sedimentary processes in Boca de Quadra and Smeaton Bay: preliminary evidence from excess 210Pb and interstitial-water chemistry

    Sugai, S.F.; Burrel, D.C.

    1979-01-01

    Sedimentary profiles of unsupported 210 Pb (t/sub 1/2/ = 22.26 years) coupled with profiles of redox-sensitive metals in the interstitial water suggest sedimentary processes that have occurred in Boca de Quadra and Smeaton Bay within the past several decades. Although average sedimentation rates can be calculated from excess 210 Pb profiles alone, ancillary information is needed to interpret the history recorded in the sedimentary column. Particularly in dynamic environments such as the fjords examined here, it is necessary to examine the combined effects of: (1) rapid deposition of sediment by slumping or major storms; (2) erosional events such as scouring; (3) homogenization of sediment by storm mixing or bioturbation; and (4) deposition of material from a different source. In this report we discuss efforts underway to examine the events responsible for the observed profiles of excess 210 Pb in the sediment of Boca de Quadra and Smeaton Bay

  4. Feeding of juvenile pirarucu (Arapaima gigas, Arapaimidae in their natural environment, lago Quatro Bocas, Araguaiana-MT, Brazil

    Valdézio de Oliveira

    Full Text Available The stomach content of samples of juvenile Arapaima gigas was analized to obtain information about feeding in natural environments. This species occurs in the Amazonian basin, predominantly in floodplain environment. This is the case of the valley of the middle rio Araguaia, where the lago Quatro Bocas is situated. Juveniles A. gigas prefered insects, microcrustaceans and gastropods, most of autochthonous origin. All the stomachs examined contained at least one food item.

  5. Francis Bacon: constructing natural histories of the invisible.

    Rusu, Doina-Cristina

    2012-01-01

    The natural histories contained in Francis Bacon's Historia naturalis et experimentalis seem to differ from the model presented in De augmentis scientiarum and the Descriptio globi intellectualis in that they are focused on the defining properties of matter, its primary schematisms and the spirits. In this respect, they are highly speculative. In this paper I aim to describe the Historia naturalis et experimentalis as a text about matter theory, the histories of which are ascending from what is most evident to the senses to what is least accessible to them. Moreover, the Latin natural histories are parts of a methodological procedure in which the provisional rules and axioms obtained in one history can be used as theoretical assumptions for another history, thereby permitting one to delve ever more profoundly into the structure of nature.

  6. The "Visual Shock" of Francis Bacon: an essay in neuroesthetics.

    Zeki, Semir; Ishizu, Tomohiro

    2013-01-01

    In this paper we discuss the work of Francis Bacon in the context of his declared aim of giving a "visual shock."We explore what this means in terms of brain activity and what insights into the brain's visual perceptive system his work gives. We do so especially with reference to the representation of faces and bodies in the human visual brain. We discuss the evidence that shows that both these categories of stimuli have a very privileged status in visual perception, compared to the perception of other stimuli, including man-made artifacts such as houses, chairs, and cars. We show that viewing stimuli that depart significantly from a normal representation of faces and bodies entails a significant difference in the pattern of brain activation. We argue that Bacon succeeded in delivering his "visual shock" because he subverted the normal neural representation of faces and bodies, without at the same time subverting the representation of man-made artifacts.

  7. Francis Bacon: teory, method and contributions to the education

    Roberto Carlos Simões Galvão

    2007-04-01

    Full Text Available In the present article, we propose a brief analysis of Francis Bacon’s thought (1561-1626 and his contributions to the Education. With Bacon, the old religious or metaphysical character of knowledge was substituted by the objectivity of the experimental science, something unknown until then. The science started to represent a means in search of an end, i.e., man’s control over nature. The desire of Bacon to promote a reorganization of the power of the human knowledge, not based on the old scholastic knowledge, but in the new scientific knowledge, was shared by educators, philosophers and statesmen of his time. The role of the school would be to assure the dissemination of this new knowledge which, properly unified, would be within reach of all the children

  8. Experimental vibration level analysis of a Francis turbine

    Bucur, D M; Dunca, G; Calinoiu, C

    2012-01-01

    In this study the vibration level of a Francis turbine is investigated by experimental work in site. Measurements are carried out for different power output values, in order to highlight the influence of the operation regimes on the turbine behavior. The study focuses on the turbine shaft to identify the mechanical vibration sources and on the draft tube in order to identify the hydraulic vibration sources. Analyzing the vibration results, recommendations regarding the operation of the turbine, at partial load close to minimum values, in the middle of the operating domain or close to maximum values of electric power, can be made in order to keep relatively low levels of vibration. Finally, conclusions are drawn in order to present the real sources of the vibrations.

  9. Simulations of Steady Cavitating Flow in a Small Francis Turbine

    Ahmed Laouari

    2016-01-01

    Full Text Available The turbulent flow through a small horizontal Francis turbine is solved by means of Ansys-CFX at different operating points, with the determination of the hydrodynamic performance and the best efficiency point. The flow structures at different regimes reveal a large flow eddy in the runner and a swirl in the draft tube. The use of the mixture model for the cavity/liquid two-phase flow allowed studying the influence of cavitation on the hydrodynamic performance and revealed cavitation pockets near the trailing edge of the runner and a cavitation vortex rope in the draft tube. By maintaining a constant dimensionless head and a distributor vane opening while gradually increasing the cavitation number, the output power and efficiency reached a critical point and then had begun to stabilize. The cavitation number corresponding to the safety margin of cavitation is also predicted for this hydraulic turbine.

  10. Prediction of dynamic blade loading of the Francis-99 turbine

    Nicolle, J; Cupillard, S

    2015-01-01

    CFD simulations focusing on capturing dynamic fluctuations of the flow for three operating points were performed for a scale model of a high head Francis turbine. A mesh sensitivity study showed an influence of the near wall resolution, consequently a low Reynolds mesh with a SST turbulence model was used. Rotor/stator fluctuations are well reproduced with the full turbine simulation at all operating points. Velocity contours and average velocity profiles from LDV measurements in the draft tube confirm that the flow physics is generally well reproduced. Simplified approaches such as profile transform and Fourier transform underestimated the measured fluctuations. As full turbine simulations were time-consuming, a simulation with only the draft tube was performed at part load to predict the fluctuations in the draft tube cone. The SAS-SST turbulence model was able to capture the vortex rope behavior

  11. [Food habits and winter diet of Charadrius melodus (Charadriiformes: Charadriidae) in Boca Ciega, Tamaulipas, Mexico].

    Banda-Villanueva, Iris; Contreras-Lozano, Jorge; Garcia-Salas, Juan; González-Páez, Hugo

    2013-06-01

    The Piping Plover (Charadrius melodus) is a migratory endangered species that arrives, along with a great number of other winter migratory birds, to Boca Ciega every year. In spite of the importance of this ecosystem, these species, are threatened by the current habitat change caused by the dredging activities in the area. With the aim to generate new information about the importance of this area during winter, we studied C melodus activities during the winter season in Laguna Madre, from December 2009 to March 2010. Our objectives were: 1) determine the importance of the area during winter, 2) describe C. melodus ethology, feeding substrate preferences and food items, 3) to analyze and describe the sympatric diversity associated with C melodus. A total of ninety nine individuals were observed during the monitoring. The Cochran and Kendall test showed a high significance of the species with the substrate and signs tests using a binomial distribution that indicated a high preference for algal type of substrate. The highest activity recorded for this species during this winter season was feeding. The principal food items found in sediments were larvae of Diptera: Chironomidae and Ephydridae. The sympatric species of C. melodus were two families of Charadriiforms: Scolopacidae (nine species) and Charadriidae (two species). We concluded that this is an important area for feeding, protection and rest sites for this species, and its protection and management is recommended.

  12. Modiolarca lateralis (Pteryomorphia: Mytilidae: bivalve associated to six species of ascidians from Bocas del Toro, Panama

    Juan I Cañete

    2013-11-01

    Full Text Available We describe the presence of the bivalve Modiolarca lateralis (Say, 1822 in six tropical ascidians Ascidia curvata, A. sydneiensis, A. panamensis, A. interrupta, Herdmania pallida and Polycarpa spongiabilis collected at depths of 1-3 m on coral reefs, mangrove roots and dock supports in Almirante Bay, Bocas del Toro, Panama (9°18'N, 82°13'W during June-July 2011. Bivalve prevalence varied between 9-30% across species, but was mainly associated with A. panamensis, P. spongiabilis and A. interrupta. Prevalence seems to be influenced by tunic thickness rather than by the ascidian size. Bivalves varied in size (0.6-11 mm shell length, with the smallest individual found in A. sydneiensis. There were only one or two bivalves per ascidians, although a maximum of 18 was found in one A. panamensis. M. lateralis seems to behave similarly to its temperate counterparts: it has a variety of hosts, occurs mainly in the anterior region of the ascidians, and has a variable abundance per host.

  13. Carcinoma epidermóide da boca em idosos de São Paulo Squamous cell carcinoma of the mouth in the elderly in São Paulo

    MÁRIO R. PERUSSI

    2002-12-01

    Full Text Available OBJETIVO: Verificar a influência das variáveis sexo e localização do tumor primário na sobrevida, em idosos portadores de câncer da boca. MÉTODOS: Estudo retrospectivo com 1440 fichas clínicas de pacientes com carcinoma epidermóide da boca do Serviço de Cirurgia de Cabeça e Pescoço do Hospital Heliópolis, São Paulo, de 1978-1997. Foram encontrados 562 idosos (idade mínima de 60 anos - critério da OMS para países em desenvolvimento e 878 nas 1ª e 2ª idades, comparando-se as freqüências das variáveis do estudo (sexo e localização do tumor. Como critério de evolução utilizou-se o tempo de vida, em meses, após o diagnóstico. Foi utilizado como método estatístico o qui-quadrado com nível de significância de 5% ( a = 0,05. RESULTADOS: A freqüência do câncer da boca em idosos permaneceu estável no período estudado (39,5% em 1978-87 vs 38,2% em 1989-1997. A relação masculino:feminino foi de 3:1 em pacientes com mais de 60 anos e 8:1 antes dos 60 anos. Observou-se um predomínio em idosos no câncer da região jugal (56% e palato (47% quando comparados com os tumores de pacientes mais jovens localizados em língua e soalho (67% e língua (62%. Não foram observadas diferenças na percentagem de pacientes falecidos antes do início do tratamento (11,6% vs 10,5% em jovens e nas percentagens de sobrevida em diferentes períodos (seis meses a cinco anos. CONCLUSÕES: Existe uma maior proporção de mulheres com câncer da boca entre os idosos quando comparadas as 1ª e 2ª idades. Compararativamente, os tumores do andar superior da boca (palato foram mais freqüentes nos indivíduos com menos de 60 anos enquanto que a localização na língua e soalho ocorreu com maior freqüência nos pacientes com idade de 60 e mais anos. As diferenças observadas em relação ao sexo e localização não se refletiram em modificação de sobrevida dos pacientes estudados.OBJECTIVE: To assess the influence of sex and primary tumor

  14. State of the art in numerical simulation of high head Francis turbines

    Trivedi Chirag

    2016-01-01

    Full Text Available The Francis-99 test case consists in a high head Francis turbine model, which geometry together with meshes and detailed experimental measurements is freely available at www.francis-99.org. Three workshops were initially planned to exchange experience on numerical investigations of the test case concerning steady state operating conditions, transient operating conditions and fluid structure analysis. The first workshop was held in Trondheim, Norway in December 2014. Some results of the 14 contributions are presented. They are concerned with the influence of the near wall space discretization and turbulence modelling in order to capture hydraulic efficiency, torque, pressure and velocity with a good uncertainty at three operating conditions.

  15. Reliability of the Francis Scale of Attitude Toward Christianity among 8-yr-olds.

    Robbins, Mandy; Francis, Leslie J; Williams, Naomi

    2003-02-01

    The Francis Scale of Attitude Toward Christianity was completed by 78 8-yr.-olds (40 boys and 38 girls) whose data support reliability measured as the internal consistency of the scale for this young sample.

  16. The Power of the Word and the Mastery of Nature: Renaissance Magic and Francis Bacon

    Špelda, Daniel

    19/43/, - (2005), s. 7-36. ISBN 80-7007-236-9. ISSN 0231-5955 Institutional research plan: CEZ:AV0Z90090514 Keywords : magic * renaissance philosophy * Francis Bacon Subject RIV: AA - Philosophy ; Religion

  17. Neogene reef coral assemblages of the Bocas del Toro region, Panama: the rise of Acropora palmata

    Klaus, J. S.; McNeill, D. F.; Budd, A. F.; Coates, A. G.

    2012-03-01

    Temporal patterns are evaluated in Neogene reef coral assemblages from the Bocas del Toro Basin of Panama in order to understand how reef ecosystems respond to long-term environmental change. Analyses are based on a total of 1,702 zooxanthellate coral specimens collected from six coral-bearing units ranging in age from the earliest Late Miocene to the Early Pleistocene: (1) Valiente Formation (12-11 Ma), (2) Fish Hole Member of the Old Bank Formation (5.8-5.6 Ma), (3) La Gruta Member of the Isla Colon Formation (2.2-1.4 Ma), (4) Ground Creek Member of the Isla Colon Formation (2.2-1.4 Ma), (5) Mimitimbi Member of the Urracá Formation (1.2-0.8 Ma), and (6) Hill Point Member of the Urracá Formation (1.2-0.8 Ma). Over 100 coral species occur in the six units, with faunal assemblages ranging from less than 10% extant taxa (Valiente Formation) to over 85% extant taxa (Ground Creek Member). The collections provide new temporal constraints on the emergence of modern Caribbean reefs, with the La Gruta Member containing the earliest occurrence of large monospecific stands of the dominant Caribbean reef coral Acropora palmata, and the Urracá Formation containing the last fossil occurrences of 15 regionally extinct taxa. Canonical correspondence analysis of 41 Late Miocene to Recent reef coral assemblages from the Caribbean region suggests changes in community structure coincident with effective oceanic closure of the Central American Seaway (~3.5 Ma). These changes, including increased Acropora dominance, may have contributed to a protracted period of elevated extinction debt prior to the major peak in regional coral extinctions (~2-1 Ma).

  18. Gubernamentalidad neoliberal, muralismo y resistencia política en el barrio de La Boca

    Luis María Blasco

    2015-12-01

    Full Text Available Desde la asunción de Mauricio Macri al frente de la gobernación de la Ciudad de Buenos Aires, en el año 2007, el barrio de La Boca es blanco de un proceso de gentrificación. Donde el Estado del GCBA promueve cambiar el perfil de la población del barrio y atraer inversiones privadas en conjunto con una población de un mayor poder adquisitivo. Provocando así la expulsión de los habitantes históricos mediante el encarecimiento de las viviendas, de los servicios públicos, etc. En paralelo a ello ha tenido lugar un proceso de construcción de memoria en el espacio público, una serie de marcas que buscan suscitar una conexión con ciertos acontecimientos: la exclusión y expulsión de quienes pueblan el barrio, los desalojos, incendios, pibes muertos de forma violenta, cierre de programas sociales, falta de espacios de recreación y deportivos. Este trabajo, entonces, reflexiona acerca de las luchas materiales y simbólicas por la construcción de memoria en el espacio público; poniendo el acento en el carácter histórico, dinámico y de lucha que tienen los procesos de construcción de identidad social en los que la memoria se materializa como resultado de las relaciones de poder y de las resistencias al poder. Para ello se retoma el caso del mural realizado en la avenida Don Pedro de Mendoza y Ministro Brin. A partir de este acontecimiento, se intenta ejercer una lectura sobre el terreno de producción de memoria en la Ciudad de Buenos Aires, tomando en cuenta que esta se realiza desde diversos dispositivos que articulan elementos heterogéneos con la finalidad de producir ciertos efectos.

  19. Robust Finite-Time Terminal Sliding Mode Control for a Francis Hydroturbine Governing System

    Fengjiao Wu; Junling Ding; Zhengzhong Wang

    2016-01-01

    The robust finite-time control for a Francis hydroturbine governing system is investigated in this paper. Firstly, the mathematical model of a Francis hydroturbine governing system is presented and the nonlinear vibration characteristics are analyzed. Then, on the basis of finite-time control theory and terminal sliding mode scheme, a new robust finite-time terminal sliding mode control method is proposed for nonlinear vibration control of the hydroturbine governing system. Furthermore, the d...

  20. The great war correspondent: Francis McCullagh, 1874–1956

    Horgan, John

    2009-01-01

    Trotsky of Russia knows Francis McCullagh. So does President Calles of Mexico. Peter, the King of Serbia, was McCullagh’s friend. The headhunters of the upper Amazon list Francis McCullagh as one of their principal deities. The warring tribes of Morocco call him blood brother. A room is always ready for him in the imperial palace of Siam. The latchstrings of hundreds of Siberian peasant huts are out in anticipation of his coming.

  1. The Visual Shock of Francis Bacon: An essay in neuroesthetics

    Semir eZeki

    2013-12-01

    Full Text Available In this paper we discuss the work of Francis Bacon in the context of his declared aim of giving a visual shock. We explore what this means in terms of brain activity and what insights into the brain’s visual perceptive system his work gives. We do so especially with reference to the representation of faces and bodies in the human visual brain. We discuss the evidence that shows that both these categories of stimuli have a very privileged status in visual perception, compared to the perception of other stimuli, including man-made artifacts such as houses, chairs and cars. We show that viewing face and house stimuli that depart significantly from a normal representation of faces and bodies entails a significant difference in the pattern of brain activation. We argue that Bacon succeeded in delivering his visual shock because he subverted the normal neural representation of faces and bodies, without at the same time subverting the representation of man-made artifacts.

  2. Civil history and poetry, certainty and truth in Francis Bacon

    Silvia Manzo

    2015-02-01

    Full Text Available This article aims at studying key components of Francis Bacon’s theory of history and of his work as practitioner of civil history, particularly in regard to truth and certainty in historical narratives. It compares Bacon’s theories of history and poetry, and the way in which he conceives their relation to certainty, truth and fiction. It analyzes mainly two sorts of writings. On the one hand, it investigates the programmatic texts where Bacon’s views of history and poetry are developed. On the other hand, it examines the finished and unfinished civil histories written by Bacon as historian. In addition, the article evaluates Bacon’s stances against the background of Renaissance and early modern English historiography. It concludes that although history and poetry constitute separate branches in Bacon’s classification of learning, they share important elements, in keeping with the view of poetry maintained by his contemporary Philip Sidney. Thus, Bacon included fictional patterns in his historical narrative and distinguished certainties from conjectures in a particular way. This attitude towards civil history shows a strong contrast to Bacon’s methodology for natural histories, which, in order to reach certainty, staunchly recommends to exclude any fictional narrative in reporting the facts of nature.

  3. The medical philosophy of Francis Bacon (1561-1626).

    Boss, J

    1978-01-01

    Francis Bacon's view of man is dualistic but, although he takes note of mental faculties, he makes the relation between mind and body, rather than the substance of mind, the basis for enquiry into mental processes and, more particularly, for the medically relevant study of mind. (He uses "mind" and "soul" as equivalent terms.) The healing of the body requires study of the body, and the ineffectiveness of physicians is due to their failure in this respect rather than to the body's complexity. To learn about the body requires clinical observation and recording, together with the comparison of bodies, experiments on living animals and attention to pathological changes. The aims of medicine should include not only the restoration of health but also the relief of suffering and they are not to be limited by putting aside a disease as incurable. To learn from treatment it must be fixed in its ordering with controlled and limited variation. Bacon has no separation of medicine from natural science; his philosophy of medicine is his general philosophy of the advancement of knowledge, but limited to a particular field of application. If medicine is separated from natural philosophy it is changed wholly or greatly into empiricism.

  4. Computation of Cavitating Flow in a Francis Hydroturbine

    Leonard, Daniel; Lindau, Jay

    2013-11-01

    In an effort to improve cavitation characteristics at off-design conditions, a steady, periodic, multiphase, RANS CFD study of an actual Francis hydroturbine was conducted and compared to experimental results. It is well-known that operating hydroturbines at off-design conditions usually results in the formation of large-scale vaporous cavities. These cavities, and their subsequent collapse, reduce efficiency and cause damage and wear to surfaces. The conventional hydro community has expressed interest in increasing their turbine's operating ranges, improving their efficiencies, and reducing damage and wear to critical turbine components. In this work, mixing planes were used to couple rotating and stationary stages of the turbine which have non-multiple periodicity, and provide a coupled solution for the stay vanes, wicket gates, runner blades, and draft tube. The mixture approach is used to simulate the multiphase flow dynamics, and cavitation models were employed to govern the mass transfer between liquid and gas phases. The solution is compared with experimental results across a range of cavitation numbers which display all the major cavitation features in the machine. Unsteady computations are necessary to capture inherently unsteady cavitation phenomena, such as the precessing vortex rope, and the shedding of bubbles from the wicket gates and their subsequent impingement upon the leading edge of the runner blades. To display these features, preliminary unsteady simulations of the full machine are also presented.

  5. Processing the papal encyclical through perceptual filters: Pope Francis, identity-protective cognition, and climate change concern.

    Landrum, Asheley R; Lull, Robert B; Akin, Heather; Hasell, Ariel; Jamieson, Kathleen Hall

    2017-09-01

    Previous research suggests that when individuals encounter new information, they interpret it through perceptual 'filters' of prior beliefs, relevant social identities, and messenger credibility. In short, evaluations are not based solely on message accuracy, but also on the extent to which the message and messenger are amenable to the values of one's social groups. Here, we use the release of Pope Francis's 2015 encyclical as the context for a natural experiment to examine the role of prior values in climate change cognition. Based on our analysis of panel data collected before and after the encyclical's release, we find that political ideology moderated views of papal credibility on climate change for those participants who were aware of the encyclical. We also find that, in some contexts, non-Catholics who were aware of the encyclical granted Pope Francis additional credibility compared to the non-Catholics who were unaware of it, yet Catholics granted the Pope high credibility regardless of encyclical awareness. Importantly, papal credibility mediated the conditional relationships between encyclical awareness and acceptance of the Pope's messages on climate change. We conclude by discussing how our results provide insight into cognitive processing of new information about controversial issues. Copyright © 2017 Elsevier B.V. All rights reserved.

  6. Turbulence modeling for Francis turbine water passages simulation

    Maruzewski, P; Munch, C; Mombelli, H P; Avellan, F; Hayashi, H; Yamaishi, K; Hashii, T; Sugow, Y

    2010-01-01

    The applications of Computational Fluid Dynamics, CFD, to hydraulic machines life require the ability to handle turbulent flows and to take into account the effects of turbulence on the mean flow. Nowadays, Direct Numerical Simulation, DNS, is still not a good candidate for hydraulic machines simulations due to an expensive computational time consuming. Large Eddy Simulation, LES, even, is of the same category of DNS, could be an alternative whereby only the small scale turbulent fluctuations are modeled and the larger scale fluctuations are computed directly. Nevertheless, the Reynolds-Averaged Navier-Stokes, RANS, model have become the widespread standard base for numerous hydraulic machine design procedures. However, for many applications involving wall-bounded flows and attached boundary layers, various hybrid combinations of LES and RANS are being considered, such as Detached Eddy Simulation, DES, whereby the RANS approximation is kept in the regions where the boundary layers are attached to the solid walls. Furthermore, the accuracy of CFD simulations is highly dependent on the grid quality, in terms of grid uniformity in complex configurations. Moreover any successful structured and unstructured CFD codes have to offer a wide range to the variety of classic RANS model to hybrid complex model. The aim of this study is to compare the behavior of turbulent simulations for both structured and unstructured grids topology with two different CFD codes which used the same Francis turbine. Hence, the study is intended to outline the encountered discrepancy for predicting the wake of turbine blades by using either the standard k-ε model, or the standard k-ε model or the SST shear stress model in a steady CFD simulation. Finally, comparisons are made with experimental data from the EPFL Laboratory for Hydraulic Machines reduced scale model measurements.

  7. Turbulence modeling for Francis turbine water passages simulation

    Maruzewski, P; Munch, C; Mombelli, H P; Avellan, F [Ecole polytechnique federale de Lausanne, Laboratory of Hydraulic Machines Avenue de Cour 33 bis, CH-1007 Lausanne (Switzerland); Hayashi, H; Yamaishi, K; Hashii, T; Sugow, Y, E-mail: pierre.maruzewski@epfl.c [Nippon KOEI Power Systems, 1-22 Doukyu, Aza, Morijyuku, Sukagawa, Fukushima Pref. 962-8508 (Japan)

    2010-08-15

    The applications of Computational Fluid Dynamics, CFD, to hydraulic machines life require the ability to handle turbulent flows and to take into account the effects of turbulence on the mean flow. Nowadays, Direct Numerical Simulation, DNS, is still not a good candidate for hydraulic machines simulations due to an expensive computational time consuming. Large Eddy Simulation, LES, even, is of the same category of DNS, could be an alternative whereby only the small scale turbulent fluctuations are modeled and the larger scale fluctuations are computed directly. Nevertheless, the Reynolds-Averaged Navier-Stokes, RANS, model have become the widespread standard base for numerous hydraulic machine design procedures. However, for many applications involving wall-bounded flows and attached boundary layers, various hybrid combinations of LES and RANS are being considered, such as Detached Eddy Simulation, DES, whereby the RANS approximation is kept in the regions where the boundary layers are attached to the solid walls. Furthermore, the accuracy of CFD simulations is highly dependent on the grid quality, in terms of grid uniformity in complex configurations. Moreover any successful structured and unstructured CFD codes have to offer a wide range to the variety of classic RANS model to hybrid complex model. The aim of this study is to compare the behavior of turbulent simulations for both structured and unstructured grids topology with two different CFD codes which used the same Francis turbine. Hence, the study is intended to outline the encountered discrepancy for predicting the wake of turbine blades by using either the standard k-{epsilon} model, or the standard k-{epsilon} model or the SST shear stress model in a steady CFD simulation. Finally, comparisons are made with experimental data from the EPFL Laboratory for Hydraulic Machines reduced scale model measurements.

  8. Turbulence modeling for Francis turbine water passages simulation

    Maruzewski, P.; Hayashi, H.; Munch, C.; Yamaishi, K.; Hashii, T.; Mombelli, H. P.; Sugow, Y.; Avellan, F.

    2010-08-01

    The applications of Computational Fluid Dynamics, CFD, to hydraulic machines life require the ability to handle turbulent flows and to take into account the effects of turbulence on the mean flow. Nowadays, Direct Numerical Simulation, DNS, is still not a good candidate for hydraulic machines simulations due to an expensive computational time consuming. Large Eddy Simulation, LES, even, is of the same category of DNS, could be an alternative whereby only the small scale turbulent fluctuations are modeled and the larger scale fluctuations are computed directly. Nevertheless, the Reynolds-Averaged Navier-Stokes, RANS, model have become the widespread standard base for numerous hydraulic machine design procedures. However, for many applications involving wall-bounded flows and attached boundary layers, various hybrid combinations of LES and RANS are being considered, such as Detached Eddy Simulation, DES, whereby the RANS approximation is kept in the regions where the boundary layers are attached to the solid walls. Furthermore, the accuracy of CFD simulations is highly dependent on the grid quality, in terms of grid uniformity in complex configurations. Moreover any successful structured and unstructured CFD codes have to offer a wide range to the variety of classic RANS model to hybrid complex model. The aim of this study is to compare the behavior of turbulent simulations for both structured and unstructured grids topology with two different CFD codes which used the same Francis turbine. Hence, the study is intended to outline the encountered discrepancy for predicting the wake of turbine blades by using either the standard k-epsilon model, or the standard k-epsilon model or the SST shear stress model in a steady CFD simulation. Finally, comparisons are made with experimental data from the EPFL Laboratory for Hydraulic Machines reduced scale model measurements.

  9. Community renewable energy in Panama: a sustainability assessment of the “Boca de Lura” PV-Wind-Battery hybrid power system

    Madriz-Vargas Rolando

    2017-01-01

    Full Text Available This paper presents a case study of a community renewable energy project implemented in the community of “Boca de Lura” located in rural Panama. This is a 2.17 kW stand-alone PV-Wind-Battery hybrid power system supplying energy to a local school also serving as a community facility. A novel sustainability assessment framework is used to examine the Boca de Lura experience and future perspectives for the power system and the project as a whole. The main challenges for Boca de Lura are discussed and recommendations to overcome some of the obstacles encountered are provided. Findings suggest that, even though the project was successfully implemented, its long-term operation is jeopardized due to non-technical aspects rather than technical ones. A potential solution is upgrading the stand-alone system into a minigrid; however, more studies and external advice are required to understand the implications for Boca de Lura, local institutions and possible national and international sponsors.

  10. COMUNICACIÓN COMERCIAL Y BOCA-OÍDO ELECTRÓNICO EN SITIOS WEB CORPORATIVOS: UN ANÁLISIS DESDE LA PERSPECTIVA DEL MARKETING DE RELACIONES

    Belanche Gracia, Daniel

    2013-01-01

    Full Text Available El imparable crecimiento del intercambio de información en internet ha fomentado que los sitios web comerciales, además de ofrecer información relevante del vendedor (comunicación comercial, comiencen a incluir herramientas de interacción online donde los consumidores comparten sus experiencias (boca-oído electrónico. Este trabajo se centra en la información que aparece en la web del vendedor para comprender como esta afecta a su relación con el consumidor y a la promoción de sus productos a través de un boca-oído entre consumidores. Los resultados del modelo de ecuaciones estructurales basándose en las respuestas de usuarios de sitios web comerciales confirman que la comunicación comercial y el boca-oído electrónico afectan positivamente a los niveles de compromiso afectivo, mientras que la confianza solo se vería afectada por el grado de comunicación comercial. Finalmente, la confianza afectaría al compromiso, y este a su vez tendría una incidencia directa sobre el nivel de boca-oído electrónico positivo.

  11. Five-Item Francis Scale of Attitude toward Christianity: Construct and Nomological Validity and Internal Consistency among Colombian College Students

    Ceballos, Guillermo A.; Suescun, Jesus D.; Oviedo, Heidi C.; Herazo, Edwin; Campo-Arias, Adalberto

    2015-01-01

    The Spanish version of the five-item Francis scale of attitude toward Christianity is a refinement of the short version of the Francis scale of attitude toward Christianity. The scale is a good measurement for intrinsic religiosity. It has been applied previously among Colombian adolescent students. The internal consistency and construct and…

  12. 75 FR 80730 - Francis Slakey on Behalf of the American Physical Society; Receipt of Petition for Rulemaking

    2010-12-23

    ... [Docket No. PRM-70-9; NRC-2010-0372] Francis Slakey on Behalf of the American Physical Society; Receipt of... the NRC by Francis Slakey on behalf of the American Physical Society (APS). The petition was docketed... that over the next few years, the NRC would be reviewing license applications for new technologies, and...

  13. Francis Bacon's New Science: Rhetoric and the Transformative Power of Print.

    Heckel, David

    The process of projecting textual models onto the phenomenal world began with the invention of writing and accelerated through the manuscript culture of classical antiquity and the Middle Ages into the age of print. In Francis Bacon's work, the book (a metaphor for the phenomenal world) adapted to the demands of the printed text and reflects the…

  14. The Culture of Science and the Rhetoric of Scientism: From Francis Bacon to the Darwin Fish

    Lessl, Thomas M.

    2007-01-01

    The culture of modern science continues to establish its public identity by appealing to values and historical conceptions that reflect its appropriation of various religious ideals during its formative period, most especially in the rhetoric of Francis Bacon. These elements have persisted because they continue to achieve similar goals, but the…

  15. Internal consistency of a Spanish translation of the Francis Scale of Attitude Toward Christianity Short Form.

    Campo-Arias, Adalberto; Oviedo, Heidi Celina; Díaz, Carmen Elena; Cogollo, Zuleima

    2006-12-01

    This study evaluated the internal consistency of a Spanish version of the short form of the Francis Scale of Attitude Toward Christianity based on responses of 405 Colombian adolescent students ages 13 to 17 years. This translated short-form version of the scale had an internal consistency of .80. This estimate indicates suitable internal consistency reliability for research use in this population.

  16. "Ajaloo lõpp" on lähedal / Francis Fukuyama ; interv. Adam Piore

    Fukuyama, Francis

    2003-01-01

    Ajakirjas Newsweek ilmunud intervjuus vastab filosoof Francis Fukuyama küsimustele 2004. aasta kõige olulisemate probleemide, EL-i, Cancunis toimunud Maailma Kaubandusorganisatsiooni kõneluste, ajaloo lõppu jõudmise, Pakistani presidendile tehtud atentaadi kohta

  17. Power Swing Generated in Francis Turbines by Part Load and Overload Instabilities

    David Valentín

    2017-12-01

    Full Text Available Hydropower plays a key role in the actual energy market due to its fast response and regulation capacity. In that way, hydraulic turbines are increasingly demanded to work at off-design conditions, where complex flow patterns and cavitation appear, especially in Francis turbines. The draft tube cavitation surge is a hydraulic phenomenon that appears in Francis turbines below and above its Best Efficiency Point (BEP. It is a low frequency phenomenon consisting of a vortex rope in the runner outlet and draft tube, which can become unstable when its frequency coincides with a natural frequency of the hydraulic circuit. At this situation, the output power can significantly swing, endangering the electrical grid stability. This study is focused on the detection of these instabilities in Francis turbines and their relationship with the output power swings. To do so, extensive experimental tests for different operating conditions have been carried out in a large prototype Francis turbine (444 MW of rated power within the frame of the European Project Hyperbole (FP7-ENERGY-2013-1. Several sensors have been installed in the hydraulic circuit (pressure sensors in the draft tube, spiral casing, and penstock, in the rotating and static structures (vibration sensors, proximity probes, and strain gauges in the runner and in the shaft, as well as in the electrical side (output power, intensity, and voltage. Moreover, a numerical Finite Element Method (FEM has been also used to relate the hydraulic excitation with the output power swing.

  18. Francis Farley presenting his novel "Catalysed Fusion" in the CERN Library

    Farley, Irina

    2013-01-01

    "Catalysed Fusion" is described by its author Francis Farley, 92, as a "true-to-life fantasy woven around particle physics" set in 1980s Geneva – "the city where nations meet and particles collide". Farley presented the book in the program "Literature in Focus" on Tuesday 16th April 2013.

  19. Hydraulic Turbines: The Francis Turbine. Technical Terminology Bulletin. Terminotech, Vol. 2, No. 2.

    General Electric Co. of Canada, Ltd., Montreal, Quebec.

    This issue of a bulletin of technological terminology is devoted to the Francis turbine. A brief narrative on the subject is presented in both French and English. An English-French dictionary of terms comprises the bulk of the document. An explanatory illustration is appended. (JB)

  20. Saint Francis Xavier on Jesuit School Stages of the Bohemian Province

    Bobková, Kateřina; Jacková, Magdaléna

    2015-01-01

    Roč. 25, č. 2 (2015), s. 135-155 ISSN 0515-3190 R&D Projects: GA ČR GPP406/12/P823 Institutional support: RVO:68378068 ; RVO:67985963 Keywords : St. Francis Xavier * Jesuit saints * Jesuit theatre * neolatin drama * school theatre * Avancini, Nicolaus * Engel, Arnoldus Subject RIV: AJ - Letters, Mass-media, Audiovision; AB - History (HIU-Y)

  1. Inventing Citizens, Imagining Gender Justice: The Suffrage Rhetoric of Virginia and Francis Minor

    Ray, Angela G.; Richards, Cindy Koenig

    2007-01-01

    From the late 1860s through the mid-1870s, woman suffrage activists developed an ingenious legal argument, claiming that the U.S. Constitution already enfranchised women citizens. The argument, first articulated by St. Louis activists Virginia and Francis Minor, precipitated rhetorical performances by movement activists on public platforms and in…

  2. Glade/woodland restoration in the St. Francis Mountain Bird Conservation Area

    David A. Hasenbeck

    2007-01-01

    The Missouri Department of Conservation (MDC), the Missouri Department of Natural Resources, the U.S. Forest Service, and American Bird Conservancy, share goals to restore and manage high quality glade, savanna, and woodland habitats within the Saint Francis Bird Conservation Area. The partnership endeavors to maintain and enhance an ecosystem with native glade and...

  3. Validez y confiabilidad de la escala breve de Francis para actitud ante el cristianismo

    Zuleima Cogollo

    2012-04-01

    Resultados. La escala Francis-5 mostró una estructura unidimensional, con un valor propio de 3,681 que dio cuenta del 73,6% de la varianza. Las mujeres puntuaron significativamente mayor que los varones, 18,5 (DE=2,7 vs. 17,9 (DE=3,3 (t = 4,3; p

  4. 78 FR 59913 - Revision of the Land Management Plan for the Francis Marion National Forest

    2013-09-30

    ... telecommunication devices for the deaf (TDD) may call the Federal Information Relay Service (FIRS) at 1-800- 877... planning process can also be found on the Francis Marion National Forest Web site at www.fs.usda.gov/goto/scnfs/fmplan . SUPPLEMENTARY INFORMATION: Pursuant to the 2012 Forest Planning Rule (36 CFR Part 219...

  5. Hydrologic and water quality monitoring on Turkey Creek watershed, Francis Marion National Forest, SC

    D.M. Amatya; T.J. Callahan; A. Radecki-Pawlik; P. Drewes; C. Trettin; W.F. Hansen

    2008-01-01

    The re-initiation of a 7,260 ha forested watershed study on Turkey Creek, a 3rd order stream, within the Francis Marion National forest in South Carolina, completes the development of a multi-scale hydrology and ecosystem monitoring framework in the Atlantic Coastal Plain. Hydrology and water quality monitoring began on the Santee Experimental...

  6. Zooplankton, chemical and other data from bottle and net cast from BOCAS DE CENIZA from the SE Pacific (limit-140) by the Inter-American Tropical Tuna Commission from 18 February 1966 to 06 March 1966 (NODC Accession 9700121)

    National Oceanic and Atmospheric Administration, Department of Commerce — Zooplankton, chemical and other data were collected from bottle and net cast from BOCAS DE CENIZA from the SE Pacific (limit-140). Data were collected by the...

  7. Zooplankton, chemical and other data from bottle and net cast from BOCAS DE CENIZA from the SE Pacific (limit-140) by the Inter-American Tropical Tuna Commission from 21 May 1965 to 04 June 1965 (NODC Accession 9700119)

    National Oceanic and Atmospheric Administration, Department of Commerce — Zooplankton, chemical and other data were collected from bottle and net cast from BOCAS DE CENIZA from the SE Pacific (limit-140). Data were collected by the...

  8. Zooplankton, chemical and other data from bottle and net cast from BOCAS DE CENIZA from the SE Pacific (limit-140) by the Inter-American Tropical Tuna Commission from 20 August 1965 to 30 August 1965 (NODC Accession 9700120)

    National Oceanic and Atmospheric Administration, Department of Commerce — Zooplankton, chemical and other data were collected from bottle and net cast from BOCAS DE CENIZA from the SE Pacific (limit-140). Data were collected by the...

  9. Uma Generalização Empírica sobre Comunicação Boca a Boca Usando Metanálise

    Celso Augusto de Matos

    2011-09-01

    Full Text Available Based on a literature review of word-of-mouth communication, a theoretical framework is proposed and tested, in which word-of-mouth (WOM is considered the main construct, satisfaction and loyalty are the antecedents and WOM valence (i.e., positive, negative and mixed is the moderator. This theoretical model is tested using data obtained from a meta-analysis. After reviewing 664 studies, a total of 90 are submitted to the analyses, since they have the relationships of interest and the required statistics (i.e., correlations between constructs or statistics for group differences. The analyzed subset of studies produced 119 independent samples and 36,673 respondents. The results showed a significant association of satisfaction and loyalty with WOM. More specifically, WOM valence introduced a significant moderating effect. This moderating effect is proposed in this paper as the following empirical generalization: considering satisfaction and loyalty as correlates of WOM, satisfaction is the variable that has a stronger relationship with positive WOM, while loyalty is the one that is more closely associated with negative WOM, which might be expressed as SATWOM(+, LEAWOM(-.

  10. Incidência e risco acumulado de câncer de boca no município de São Paulo: 1969, 1973, 1978 e 1998

    Ricardo Luiz Lorenzi

    2003-01-01

    Introdução. O câncer de boca em 1998 foi a décima-primeira localização mais comum das neoplasias malignas, exceto pele, no sexo masculino, em São Paulo, com 1,6% dos casos. Dados do Registro de Câncer de São Paulo mostram que a incidência não diminuiu em anos recentes. A região é de alta incidência para esse tipo de câncer, em comparação às demais regiões brasileiras e mesmo em termos mundiais. Julgou-se de interesse de Saúde Pública verificar a incidência do câncer de boca no Município de Sã...

  11. Modo de produzir - Modo de trabalhar : relações de produção e trabalho no cinema da Boca do Lixo

    Ricardo Normanha Ribeiro de Almeida

    2012-01-01

    Resumo: O objetivo central deste trabalho é analisar a relação entre o modo de produção cinematográfica do ciclo Boca do Lixo, em São Paulo, e as condições e relações de trabalho dos profissionais envolvidos nestas produções. O ciclo Boca do Lixo se desenvolve por volta das décadas de 1970 e 1980 e caracteriza-se por algumas especificidades em seu esquema de produção, a começar pela ausência de financiamento estatal e pela parceria estabelecida entre produtores e exibidores. Concentrados nas ...

  12. The Internal Consistency Reliability of the Katz-Francis Scale of Attitude toward Judaism among Australian Jews

    Patrick Lumbroso

    2016-09-01

    Full Text Available The Katz-Francis Scale of Attitude toward Judaism was developed initially to extend among the Hebrew-speaking Jewish community in Israel a growing body of international research concerned to map the correlates, antecedents and consequences of individual differences in attitude toward religion as assessed by the Francis Scale of Attitude toward Christianity. The present paper explored the internal consistency reliability and construct validity of the English translation of the Katz-Francis Scale of Attitude toward Judaism among 101 Australian Jews. On the basis of these data, this instrument is commended for application in further research.

  13. Seguimiento del contorno externo de la boca en imágenes de vídeo Outer Lip contour tracking in video images

    Alexánder Ceballos

    2009-01-01

    Full Text Available El seguimiento preciso de la boca de una persona, cuando está hablando, es un desafío importante en varias aplicaciones, como la identificación de la cara o la interacción con el computador. La complejidad de forma, textura y color de la boca, y los cambios de iluminación y fondos de los posibles escenarios hacen que este sea aún un problema abierto. En este artículo se propone un algoritmo para el seguimiento del contorno externo de la boca, sin utilizar marcadores o alguna clase de maquillaje para resaltar los labios, basado en apariencia y en restricciones morfológicas definidas en el estándar MPEG-4. El algoritmo es robusto ante la presencia de barba, tono de piel y calidad de la imagen.An accurate tracking of a person's mouth when he/she is speaking is an important challenge in several applications such as face identification or interaction with computer. Complexity of shape, texture, and color of the mouth, as well as changes in lighting and backgrounds of possible scenarios makes of it an open problem yet. This article proposed an algorithm for a tracking of the mouth external contour without using markers or any kind of make-up for highlighting lips, based on appearance and morphological restrictions defined by the MPEG-4 Standard. Algorithm is robust before the presence of beard, skin tone, and image quality.

  14. Endoscopia de contato (microestomatoscopia nas lesões da boca e do lábio: avaliação do método

    Gyl H A Ramos

    Full Text Available OBJETIVO: Descrever as dificuldades da endoscopia de contato aplicada à boca e ao lábio (microestomatoscopia de contato e aplicar nas lesões do lábio os critérios usados na endoscopia de contato de outras topografias. MÉTODO: Estudo prospectivo utilizando o endoscópio de contato Storz 8715A e o corante azul de toluidina. Vinte exames foram feitos para aprendizado da técnica e depois mais 31 (21 lesões do lábio e 10 da boca, todos exames in vivo. Os critérios avaliados foram: Celularidade, Arquitetura, Estratificação e Morfologia. RESULTADOS: A falta de nitidez, os tremores finos e o deslizamento do aparelho dificultaram o procedimento em 100% dos casos, mas permitiram um exame adequado. Os 13 diagnósticos de malignidade das lesões do lábio apresentaram todos os critérios alterados. CONCLUSÃO: as dificuldades encontradas foram o contato do aparelho com a superfície anatômica, o deslizamento do aparelho, os tremores finos e a falta de nitidez da imagem, que não inviabilizaram a realização e a interpretação do exame. Os critérios são aplicáveis às lesões da boca e do lábio inferior.

  15. Avaliação da concordância da sialometria e cintilografia de glândulas salivares em pacientes com boca seca Evaluation of the concordance of sialometry and salivary glands scintigraphy in dry mouth patients

    Bianca Maria Liquidato

    2006-02-01

    Full Text Available INTRODUÇÃO: São utilizados vários exames para avaliar os pacientes com queixa de boca seca e, especialmente, os pacientes com Síndrome de Sjögren, em que estes exames fazem parte de critérios de classificação para estudos científicos. OBJETIVO: Desta maneira, procurou-se avaliar se haveria concordância entre os resultados da sialometria e da cintilografia de glândulas salivares para, se esta concordância estiver presente, optar por apenas um dos dois exames. CASUÍSTICA E MÉTODO: Foram avaliados 72 pacientes com boca seca, divididos em grupos não-Síndrome de Sjögren, com Síndrome de Sjögren primária e com Síndrome de Sjögren secundária. Os resultados de sialometria e cintilografia de glândulas salivares foram estudados, procurando-se dimensionar a concordância existente entre eles, através do teste de Kappa. RESULTADOS: Observou-se concordância igual ou próxima de zero entre os dois testes. CONCLUSÃO: Pelos resultados observados, não é possível fazer a opção por um ou outro exame, devendo ambos serem realizados.INTRODUCTION: Many diagnostic tests are used to evaluate dry mouth patients, especially the ones with Sjögren’s Syndrome, to whom these tests are part of classification criteria for scientific studies. AIM: Thus, the concordance between results of sialometry and salivary glands scintigraphy was evaluated; if positive, it would enable the choice of one or the other for diagnosis. PATIENTS AND METHOD: Seventy-two dry mouth patients were divided into non-Sjögren’s Syndrome group, primary Sjögren’s Syndrome group and secondary Sjögren’s Syndrome group. The concordance among sialometry and scintigraphy results was evaluated by Kappa test. RESULTS: It was observed that their concordance was equal or near to zero. CONCLUSION: It is not possible to make a choice between these tests and both should be performed.

  16. Internal consistency of a five-item form of the Francis Scale of Attitude Toward Christianity among adolescent students.

    Campo-Arias, Adalberto; Oviedo, Heidi Celina; Cogollo, Zuleima

    2009-04-01

    The short form of the Francis Scale of Attitude Toward Christianity (L. J. Francis, 1992) is a 7-item Likert-type scale that shows high homogeneity among adolescents. The psychometric performance of a shorter version of this scale has not been explored. The authors aimed to determine the internal consistency of a 5-item form of the Francis Scale of Attitude Toward Christianity among 405 students from a school in Cartagena, Colombia. The authors computed the Cronbach's alpha coefficient for the 5 items with a greater corrected item-total punctuation correlation. The version without Items 2 and 7 showed internal consistency of .87. The 5-item version of the Francis Scale of Attitude Toward Christianity exhibited higher internal consistency than did the 7-item version. Future researchers should corroborate this finding.

  17. [Sedimentological Implications of the change in the coverage of mangrove forest in Boca Zacate, Térraba-Sierpa National Wetlands, Costa Rica].

    Silva Benavides, Ana Margarita; Picado Barboza, Jorge; Mora Rodríguez, Fernando; González Gairaud, Carmen

    2015-09-01

    In the last sixty years many geomorphological changes have occurred in Costa Rica's Térraba-Sierpe National Wetlands. Changes in coastal geomorphology are generally associated with erosion or accretion of sediment, which has led to the removal of sections of mangrove forests or sediment banks colonized by mangroves. The aim of this study was to analyze sedimentation as a leading process in the dynamics of coastal morphology and its implications for mangrove forest cover in the Boca Zacate area of Térraba-Sierpe wetlands. The study was conducted in the sectors of Bocón, Brujo and Coco Island in Boca Zacate, from 2008 to 2013. The research was based on a multi-temporal analysis of coastal morphology using aerial photographs from the years 1948, 1960, 1974, 1978, 1984, 1992 and 2011. The following measurements were also performed: monthly sedimentation rate (g/cm2/day), and granulometric composition and content of chemical elements in the sediments of the study area. These last two measurements were performed once each in the dry and rainy seasons during the years of study. The results indicated that over the past 60 years, Boca Zacate has witnessed a process of sustained erosion; from 1948 through 2001, losing 10.6 % of its land and approximately 8.9 % of its forest cover. It has also experienced accretion in the area of Coco Island. The Brujo sector showed the highest sedimentation rate and the Camibar estuary, the lowest. The dominant type of sediment in all study sites was sand, followed by clay and silt. The most widespread chemical elements (mg/L) included magnesium, calcium and potassium; others, such as manganese, iron, aluminum, phosphorus, zinc and copper, were measured in smaller amounts. Transport, composition and quantity of sediment in Boca Zacate are crucial to the changes that have occurred on the coastal area of La Boca, where the presence of dead trees was evident. This geomorphological analysis holds great importance for future guidelines and

  18. Embryo production in the sponge-dwelling snapping shrimp Synalpheus apioceros (Decapoda, Alpheidae from Bocas del Toro, Panama

    Adriana Rebolledo

    2014-11-01

    Full Text Available Caridean shrimps of the genus Synalpheus are abundant and widely distributed in tropical and subtropical regions, but knowledge of their reproductive biology remains scarce. We report reproductive traits of Synalpheus apioceros from Bocas del Toro, Panama, based on collections in August 2011. The 46 ovigerous females that were analyzed ranged in size from 3.8 to 7.4 mm in carapace length. Fecundity varied between 8 and 310 embryos and increased with female size. Females invested 18.6 ± 10.3% of their body weight in Embryo production. Embryo volume increased considerably (77.2% during embryogenesis, likely representing water uptake near the end of incubation period. Compared to Synalpheus species with abbreviated or direct development, S. apioceros produced substantially smaller embryos; however, S. apioceros seems to have a prolonged larval phase with at least five zoeal stages, which may explain the combination of relatively small and numerous embryos. We did not find nonviable, minute, chalky embryos, previously reported for S. apioceros specimens obtained from the northwestern Gulf of Mexico, which supports the hypothesis that the production of this type of embryos may be a physiological response of this warm-water species to the temperature decrease near to its latitudinal range limit.

  19. Effects of draft tube on the hydraulic performance of a Francis turbine

    Jeon, J H; Byeon, S S; Kim, Y J

    2013-01-01

    The draft tube is an important component of a Francis turbine which influences the hydraulic performance. It is located just under the runner and allowed to decelerate the flow velocity exiting the runner, thereby converting the excess of kinetic energy into static pressure. In this study, we have numerically investigated the hydraulic performance of a Francis turbine on the 15MW hydropower generation with various design parameters (three types of draft tube, thickness of guide vane) through a three-dimensional numerical method with the SST turbulent model. The vortex rope characteristics of the draft tube were confirmed. The results of the vortex flow fields and flow characteristics were graphically depicted with different design parameters and operating conditions

  20. Robust Finite-Time Terminal Sliding Mode Control for a Francis Hydroturbine Governing System

    Fengjiao Wu

    2016-01-01

    Full Text Available The robust finite-time control for a Francis hydroturbine governing system is investigated in this paper. Firstly, the mathematical model of a Francis hydroturbine governing system is presented and the nonlinear vibration characteristics are analyzed. Then, on the basis of finite-time control theory and terminal sliding mode scheme, a new robust finite-time terminal sliding mode control method is proposed for nonlinear vibration control of the hydroturbine governing system. Furthermore, the designed controller has good robustness which could resist external random disturbances. Numerical simulations are employed to verify the effectiveness and superiority of the designed finite-time sliding mode control scheme. The approach proposed in this paper is simple and also provides a reference for relevant hydropower systems.

  1. Experimental investigations of the unsteady flow in a Francis turbine draft tube cone

    Baya, A; Muntean, S; Campian, V C; Cuzmos, A; Diaconescu, M; Balan, G

    2010-01-01

    Operating Francis turbines at partial discharge is often hindered by the development of the helical vortex (so-called vortex rope) downstream the runner, in the draft tube cone. The unsteady pressure field induced by precessing vortex rope leads to pressure fluctuations. The paper presents the experimental investigations of the unsteady pressure field generated by precessing vortex rope and its associated pressure fluctuations into a draft tube of the Francis turbine operating at partial discharge. In situ measurements are performed in order to evaluate the pressure fluctuations and vortex rope frequency at partial load operation. Three pressure taps are installed on the cone wall of the draft tube in order to record the unsteady pressure. As a result, the Fourier spectra are obtained in order to evaluate the amplitude of pressure fluctuations and vortex rope frequency. Moreover, the wall pressure recovery along to the draft tube cone is acquired. Finally, conclusions are drawn in order to present the vortex rope effects.

  2. Experimental investigations of the unsteady flow in a Francis turbine draft tube cone

    Baya, A [Department of Hydraulic Machinery, ' Politehnica' University of Timisoara Bv. Mihai Viteazu 1, RO-300222, Timisoara (Romania); Muntean, S [Centre of Advanced Research in Engineering Sciences, Romanian Academy - Timisoara Branch Bv. Mihai Viteazu 24, RO-300223, Timisoara (Romania); Campian, V C; Cuzmos, A [Research Center in Hydraulics, Automation and Heat Transfer, ' Eftimie Murgu' University of Resita P-ta. Traian Vuia 1-4, RO-320085, Resita (Romania); Diaconescu, M; Balan, G, E-mail: abaya@mh.mec.upt.r [Ramnicu Valcea Subsidiary, S.C. Hidroelectrica S.A. Str. Decebal 11, RO-240255, Ramnicu Valcea (Romania)

    2010-08-15

    Operating Francis turbines at partial discharge is often hindered by the development of the helical vortex (so-called vortex rope) downstream the runner, in the draft tube cone. The unsteady pressure field induced by precessing vortex rope leads to pressure fluctuations. The paper presents the experimental investigations of the unsteady pressure field generated by precessing vortex rope and its associated pressure fluctuations into a draft tube of the Francis turbine operating at partial discharge. In situ measurements are performed in order to evaluate the pressure fluctuations and vortex rope frequency at partial load operation. Three pressure taps are installed on the cone wall of the draft tube in order to record the unsteady pressure. As a result, the Fourier spectra are obtained in order to evaluate the amplitude of pressure fluctuations and vortex rope frequency. Moreover, the wall pressure recovery along to the draft tube cone is acquired. Finally, conclusions are drawn in order to present the vortex rope effects.

  3. On the centenary of the birth of Francis H. C. Crick - from physics to genetics and neuroscience.

    Teive, Hélio A G

    2016-04-01

    The year 2016 marks the centenary of the birth of Francis Crick (1916-2004), who made outstanding contributions to genetics and neuroscience. In 1953, in a collaborative study, Francis Crick and James Watson discovered the DNA double helix, and in 1962 they and Maurice Wilkins were awarded the Noble Prize in Physiology or Medicine. Crick subsequently became very interested in neuroscience, particularly consciousness and its relationship to the claustrum, a small gray matter structure between the insula and putamen.

  4. Psychometric properties of the Francis Scale of Attitude Towards Christianity among Portuguese university students.

    Ferreira, Ana Veríssimo; Neto, Félix

    2002-12-01

    To facilitate use of the adult form of the Francis Scale of Attitude Towards Christianity in cross-cultural studies, the psychometric characteristics of the translated scale were examined among 323 university students in Portugal (130 men and 193 women). Their ages ranged from 18 to 31 years. Analysis supported the unidimensionality, internal consistency, and construct validity of this scale in this sample of Portuguese university students.

  5. The Norwegian translation of the Francis Scale of Attitude toward Christianity.

    Francis, Leslie J; Enger, Trond

    2002-12-01

    This paper reviews the development of the Francis Scale of Attitude toward Christianity and then examines the psychometric properties of the Norwegian translation of this instrument among a sample of 479 young people between the ages of 11 and 18 years attending secondary school. The data support the reliability of this instrument and commend it for further validation studies and for wider general use among young people in Norway.

  6. Assessing clergy work-related psychological health : reliability and validity of the Francis Burnout Inventory

    Francis, Leslie J.; Laycock, Patrick; Crea, Giuseppe

    2017-01-01

    Drawing on the classic model of balanced affect, the Francis Burnout Inventory (FBI) conceptualised good work-related psychological health among clergy in terms of negative affect being balanced by positive affect. In the FBI negative affect is assessed by the Scale of Emotional Exhaustion in Ministry (SEEM) and positive affect is assessed by the Satisfaction in Ministry Scale (SIMS). In support of the idea of balanced affect, previous work had shown a significant interaction between the effe...

  7. The calculation of fluid-structure interaction and fatigue analysis for Francis turbine runner

    Wang, X F; Li, H L; Zhu, F W

    2012-01-01

    Francis turbine, as a widely used hydro turbine, is especially suited for the hydropower station with high hydraulic head and higher hydraulic head. For such turbine generator units all around the world, the crack streaks usually come out after a long time use and the resulted accidents may cause huge losses. Hence, it is meaningful to refine the design assuring the stability and safety of the Francis turbine. In this paper, the stiffness and strength as well as the fatigue life of the Francis turbine are studied. Concerning on the turbine of one certain hydropower station, the flow field inside the turbine are first simulated and the pressure distribution around the blades are derived. Meanwhile, the stress distributions of the blades are also obtained. Based on these, the fatigue analyses are applied on the turbine. According to the results of fatigue analyses, some optimal designs on the turbine are verified. The results show that with the optimal designs, the hydraulic performances of the turbine do not change too much while the maximum stress on the turbine decrease and the fatigue life increase as well.

  8. Hydroacoustic simulation of rotor-stator interaction in resonance conditions in Francis pump-turbine

    Nicolet, C; Ruchonnet, N; Alligne, S; Avellan, F; Koutnik, J

    2010-01-01

    Combined effect of rotating pressure field related to runner blade and wakes of wicket gates leads to rotor stator interactions, RSI, in Francis pump-turbines. These interactions induce pressures waves propagating in the entire hydraulic machine. Superposition of those pressure waves may result in standing wave in the spiral casing and rotating diametrical mode in the guide vanes and can cause strong pressure fluctuations and vibrations. This paper presents the modeling, simulation and analysis of Rotor-Stator Interaction of a scale model of a Francis pump-turbine and related test rig using a one-dimensional approach. The hydroacoustic modeling of the Francis pump-turbine takes into account the spiral casing, the 20 guide vanes, the 9 rotating runner vanes. The connection between stationary and rotating parts is ensured by a valve network driven according to the unsteady flow distribution between guide vanes and runner vanes. Time domain simulations are performed for 2 different runner rotational speeds in turbine mode. The simulation results are analyzed in frequency domain and highlights hydroacoustic resonance between RSI excitations and the spiral case. Rotating diametrical mode in the vaneless gap and standing wave in the spiral case are identified. The influence of the resonance on phase and amplitude of pressure fluctuations obtained for both the spiral case and the vaneless gap is analyzed. The mode shape and frequencies are confirmed using eigenvalues analysis.

  9. St. Francis' Nursing Home, Mount Oliver, Dundalk, Louth.

    Treacy, Ann

    2013-01-01

    Placental villous maturation is maximal in the 3rd trimester, with an abundance of terminal villi. Delayed villous maturation (DVM) of the placenta is associated with chromosomal abnormalities, gestational diabetes, and an adverse outcome. This study compares quantitative assessment of vasculo-syncytial membranes (VSM) in cases of liveborn infants, perinatal deaths, and controls. Cases were selected as follows: (1) liveborn infants with a qualitative diagnosis of DVM (n  =  15); (2) controls matched for gestational age whose placentas did not have DVM (n  =  15); (3) stillbirths (SB)\\/neonatal deaths (NND) showing DVM (n  =  13); and (4) SB from autopsies in which DVM was felt to be the cause of death (COD) (n  =  12). Vasculo-syncytial membranes were counted in 10 terminal villi in each of 10 consecutive high-power fields on 3 slides. Data analysis was carried out using SPSS. Liveborn cases with DVM showed statistically significantly less VSM than controls (mean 1.01 vs 2.42, P < 0.0001). The SB\\/NND group also showed significantly less VSM than the control group (mean 0.46 vs 2.42, P < 0.0001) and less than the liveborn DVM group (mean 0.46 vs 1.01, P  =  0.001). The COD group was significantly different from the control group (mean 0.42 vs 2.42, P < 0.0001) and the liveborn DVM group (mean 0.42 vs 1.01, P < 0.0001) but not significantly different from the SB\\/NND group. There is a quantitative reduction in VSM in cases of DVM compared to controls.

  10. Hábitos alimenticios y dieta invernal de Charadrius melodus (Charadriiformes: Charadriidae en Boca Ciega, Tamaulipas, México Food habits and winter diet of Charadrius melodus (Charadriiformes: Charadriidae in Boca Ciega, Tamaulipas, Mexico

    Iris Banda-Villanueva

    2013-06-01

    Full Text Available Charadrius melodus es una especie migratoria en peligro de extinción. Cada año, la Laguna Madre recibe aves migratorias invernales, incluyendo a la especie antes mencionada, sin embargo su estabilidad se encuentra amenazada por el cambio de hábitat ocasionado por el dragado que se está realizando en la zona. La falta de estudios sobre C. melodus durante el invierno en la Laguna Madre, motivó la realización del trabajo (diciembre 2009-marzo 2010. Los objetivos fueron: 1 determinar la importancia del área invernal, 2 describir la etología y preferencias de sustrato en la alimentación, 3 analizar ítems alimenticios potenciales y describir la diversidad simpátrica asociadas a C. melodus. Se observaron 99 individuos durante el muestreo. Las pruebas de Cochran y Kendall presentaron una alta significancia de la especie con un tipo de sustrato y las pruebas de signos utilizando una distribución binomial indicaron que existe una alta preferencia hacia un tipo de sustrato. La mayor actividad registrada durante el periodo de muestreo fue la de alimentación. Los recursos alimenticios encontrados en las muestras de sedimentos fueron larvas de Dípteros. Las especies simpátricas a C. melodus pertenecen al orden Charadriiformes con dos familias: Charadriidae nueve especies y Scolopacidae dos especies. Por la importancia de la zona, se recomienda proteger Boca Ciega, pues representa sitios de alimentación, protección y descanso para el Chorlo melódico.The Piping Plover (Charadrius melodus is a migratory endangered species that arrives, along with a great number of other winter migratory birds, to Boca Ciega every year. In spite of the importance of this ecosystem, these species, are threatened by the current habitat change caused by the dredging activities in the area. With the aim to generate new information about the importance of this area during winter, we studied C. melodus activities during the winter season in Laguna Madre, from December

  11. Staphylococcus aureus detection in the mouth of housekeepers Detección de Staphylococcus aureus en la boca de trabajadores de la limpieza hospitalaria Detecção de Staphylococcus aureus na boca de trabalhadores da limpeza hospitalar

    Elaine Drehmer de Almeida Cruz

    2011-02-01

    Full Text Available This study assessed the prevalence of colonization by Staphylococcus aureus in hospital housekeepers, and their knowledge and beliefs regarding this problem. Three saliva samples were collected and a questionnaire regarding knowledge and beliefs was applied. Of the 92 workers, 63 (68.5% participated in the study; 20 were not and 43 were colonized; 13 by methicillin resistant Staphylococcus aureus and 30 by methicillin sensitive Staphylococcus aureus. Persistent carrier status of methicillin resistant Staphylococcus aureus was detected in 15.4% of cases. Low knowledge and perception of occupational risk were observed. The mouth was identified as an important reservoir of methicillin resistant Staphylococcus aureus. Analyzing knowledge and beliefs, as well as the state of carrier, is an important strategy to be added to educational actions for the prevention of workers' colonization.Este estudio evaluó la prevalencia de la colonización por Staphylococcus aureus en trabajadores de limpieza hospitalaria, y su conocimiento y creencias acerca de la problemática. Fueron recolectadas tres muestras de saliva y aplicado un cuestionario referente al conocimiento y creencias. De 92 trabajadores, 63 (68,5% participaron del estudio; 20 se presentaron no colonizados y 43 colonizados; 13 para Staphylococcus aureus resistente a la meticilina y 30 para Staphylococcus aureus sensibles a la meticilina. El estado de portador persistente por Staphylococcus aureus resistente a la meticilina fue detectado en 15,4% de los casos. Bajo conocimiento y percepción del riesgo ocupacional fueron observados. La boca fue identificada como importante reservatorio de Staphylococcus aureus resistente a la meticilina. Analizar el conocimiento y creencias juntamente con la investigación del estado de portador es una importante estrategia a ser agregada a las acciones educativas para la prevención de la colonización de trabajadores.Este estudo avaliou a prevalência da coloniza

  12. Hábitos alimenticios y dieta invernal de Charadrius melodus (Charadriiformes: Charadriidae en Boca Ciega, Tamaulipas, México

    Iris Banda-Villanueva

    2013-06-01

    Full Text Available Charadrius melodus es una especie migratoria en peligro de extinción. Cada año, la Laguna Madre recibe aves migratorias invernales, incluyendo a la especie antes mencionada, sin embargo su estabilidad se encuentra amenazada por el cambio de hábitat ocasionado por el dragado que se está realizando en la zona. La falta de estudios sobre C. melodus durante el invierno en la Laguna Madre, motivó la realización del trabajo (diciembre 2009-marzo 2010. Los objetivos fueron: 1 determinar la importancia del área invernal, 2 describir la etología y preferencias de sustrato en la alimentación, 3 analizar ítems alimenticios potenciales y describir la diversidad simpátrica asociadas a C. melodus. Se observaron 99 individuos durante el muestreo. Las pruebas de Cochran y Kendall presentaron una alta significancia de la especie con un tipo de sustrato y las pruebas de signos utilizando una distribución binomial indicaron que existe una alta preferencia hacia un tipo de sustrato. La mayor actividad registrada durante el periodo de muestreo fue la de alimentación. Los recursos alimenticios encontrados en las muestras de sedimentos fueron larvas de Dípteros. Las especies simpátricas a C. melodus pertenecen al orden Charadriiformes con dos familias: Charadriidae nueve especies y Scolopacidae dos especies. Por la importancia de la zona, se recomienda proteger Boca Ciega, pues representa sitios de alimentación, protección y descanso para el Chorlo melódico.

  13. Toxicities of RDX or TNT Freshly Amended or Weathered-and-Aged in Five Natural Soils to the Collembolan Folsomia candida

    2013-05-01

    Explosive 2,4,6-Trinitrotoluene. Ecotoxicol. Environ. Saf. 2002, 51, 133–144. 65 Gorontzy, T.; Drzyga, O.; Kahl, M.W.; Bruns- Nigel , D.; Breitung, J... Taylor and Francis Group: Boca Raton, FL, 2009; pp 5–33. Monteil-Rivera, F.; Paquet, L.; Deschamps, S.; Balakrishnan, V.K.; Beaulieu, C.; Hawari, J

  14. Dos obras del escultor neoclásico inglés John Francis (1780- 1861 en una colección particular española

    Quintanilla Martínez, Emilio

    2012-09-01

    Full Text Available Two previously unknown works by the British neoclassical sculptor John Francis dating from the second quarter of the 19th century, representing the 1st Duke of Sutherland and, most likely, the sculptor Sir John Francis, have been located in a Spanish private collection.

    Dos obras, hasta ahora inéditas, del escultor neoclásico inglés John Francis del segundo cuarto del siglo XIX, y que representan al primer duque de Sutherland y seguramente al escultor Sir John Francis, en colección privada española.

  15. Alimentación, salud y pobreza en áreas marginadas urbanas: caso Veracruz-Boca del Río, Veracruz, México

    Del Ángel-Pérez, Ana Lid; Villagómez-Cortés, José Alfredo

    2014-01-01

    Se caracterizó la alimentación en 120 hogares en áreas marginadas en Veracruz-Boca del Río, México, mediante el Indice de Diversidad Dietética y su asociación con variables socioeconómicas. Los hogares se clasificaron en cuatro niveles socioeconómicos, 99% se ubicó en situación de pobreza. De 52% a 71% del ingreso familiar se gasta en alimentos. En la dieta prevalecen alimentos con alto contenido calórico, proteína animal de baja calidad y bajo consumo de frutas y verduras. La diversidad diet...

  16. A Song in the Dark. Francis of Assisi’s Canticle of Brother Sun

    Speelman Willem Marie

    2016-10-01

    Full Text Available The Canticle of the Creatures or Canticle of Brother Sun is based on a particular way of perceiving reality. Francis, who had turned away from ‘the world’, discovered a different way of looking at it. This is a divine way of perceiving, in which the senses do not grasp reality, but accept it as it communicates itself. This way of perceiving is only possible if one does not attempt to master the environment, but allows one’s senses to be weak. It is significant, therefore, that this song of praise was born at a moment of the utmost despair and weakness. The song’s content is in line with this weak perception: it is not about Francis who praises God and (or for His creatures, but rather it is a testimony that the creatures-the elements-are already praising God, and a prayer that He should let Himself be praised by the creatures. Also in line with this weak perception is the fact that the creatures are praised just as they communicate themselves to Francis: as bodies. The theology of this song is that the creatures through their bodies resonate (strengthen, and colour the blessings that come from God, thereby making His blessing present here on earth. Francis’ role is to give a voice and a language to the heavenly praises as they resound in his environment. The transformative power of this song is that we, whether consciously or not, do the same thing when we participate in this song.

  17. Francis Bacon's Valerius Terminus and the Voyage to the "Great Instauration".

    Serjeantson, Richard

    2017-01-01

    Francis Bacon's earliest surviving natural philosophical treatise (composed circa 1603) bears the title Valerius Terminus of the Interpretation of Nature. This study, resting on fresh attention to the surviving authorial manuscript, has three goals. It begins by identifying a lost precursor work apparently entitled "Of Active Knowledge." It then examines the significance of the pseudonyms Bacon chose to introduce his ideas, considering especially his invocation of Erasmus's emblem, the Roman deity Terminus. Finally, it shows how the Valerius Terminus's global vision of contemporary knowledge ultimately helped shape the iconography of Bacon's published Instauratio magna.

  18. The Rule of Three for Prizes in Science and the Bold Triptychs of Francis Bacon.

    Goldstein, Joseph L

    2016-09-22

    For many scientific awards, such as Nobels and Laskers, the maximum number of recipients is three. This Rule of Three forces selection committees to make difficult decisions that increase the likelihood of singling out those individuals who open a new field and continue to lead it. The Rule of Three is reminiscent of art's three-panel triptych, a form that the modern master Francis Bacon used to distill complex stories in a bold way. Copyright © 2016 Elsevier Inc. All rights reserved.

  19. Influence of the rotor-stator interaction on the dynamic stresses of Francis runners

    Guillaume, R; Scolaro, D; Deniau, J L; Colombet, C

    2012-01-01

    Thanks to advances in computing capabilities and Computational Fluid Dynamics (CFD) techniques, it is now possible to calculate realistic unsteady pressure fields in Francis turbines. This paper will explain methods to calculate the structural loads and the dynamic behaviour in order to optimize the turbine design and maximize its reliability and lifetime. Depending on the operating conditions of a Francis turbine, different hydraulic phenomena may impact the mechanical behaviour of the structure. According to their nature, these highly variable phenomena should be treated differently and specifically in order to estimate the potential risks arising on submerged structures, in particular the runner. The operating condition studied thereafter is the point at maximum power with the maximum head. Under this condition, the runner is excited by only one dynamic phenomenon named the Rotor-Stator Interaction (RSI). The origin of the phenomenon is located on the radial gap of the turbine and is the source of pressure fluctuations. A fluid-structure analysis is performed to observe the influence of that dynamic pressure field on the runner behaviour. The first part of the paper deals with the unsteady fluid computation. The RSI phenomenon is totally unsteady so the fluid simulation must take into account the entire machine and its rotation movement, in order to obtain a dynamic pressure field. In the second part of the paper, a method suitable for the RSI study is developed. It is known that the fluctuating pressure in this gap can be described as a sum of spatial components. By evaluating these components in the CFD results and on the scale model, it is possible to assess the relevance of the numerical results on the whole runner. After this step, the numerical pressure field can be used as the dynamic load of the structure. The final part of the paper presentsthe mechanical finite element calculations. A modal analysis of the runner in water and a harmonic analysis of its

  20. A Influência do Valor Percebido e da Satisfação do Cliente sobre o Comportamento de Boca a Boca: uma análise em academias de ginásticaThe Influence of Perceived Value and Customer Satisfaction on the Word of Mouth Behavior: an analysis in academies of gymnasticsLa Influencia del Valor Percibido y de la Satisfacción del Cliente en la Conducta Boca a Boca: un análisis en los gimnasios

    COSTA, Francisco José da

    2008-09-01

    Full Text Available RESUMOO propósito central deste artigo foi analisar a relação entre os construtos valor percebido (e seus antecedentes de qualidade e sacrifício, satisfação dos clientes de serviços, e comportamento de boca a boca (nas dimensões de intensidade e favorabilidade. A partir da revisão da literatura sobre os temas, foram enunciadas treze hipóteses de pesquisa, que foram aplicadas, tomando como contexto empírico o setor de academias de ginástica da cidade de Fortaleza (Ceará. Foi pesquisada uma amostra de 108 respondentes, com coleta de dados feita por meio de questionário estruturado, aplicado em quatro diferentes academias. Os construtos foram avaliados em separado, por meio de estatísticas descritivas e a análise das hipóteses foi feita com o apoio da técnica estatística Análise de Regressão Múltipla, realizada em cinco modelos distintos. Os resultados encontrados mostraram a consistência de nove das treze hipóteses, indicando, especialmente, que a satisfação e o valor percebido são antecedentes consistentes da favorabilidade e da intensidade das ações de boca a boca dos clientes. Os resultados apontaram elementos para uma melhor compreensão das relações definidas, e, também dá indicações para futuras pesquisas envolvendo os temas tratados.ABSTRACTThe main purpose of this article was to analyze the relationship between the constructs perceived value (and its antecedents of quality and sacrifice, satisfaction of services customers, and word of mouth behavior (in its dimensions of activity and praise. From the literature review, 13 hypotheses were announced, and these hypotheses were submitted to test taking as empirical context the sector of fitness gyms from the city of Fortaleza (Ceará. A sample of 108 respondents was searched, with data collection done with a structured questionnaire, administered in four different fitness gyms. The constructs were evaluated separately, by using descriptive statistics, and the

  1. Implicaciones sedimentológicas sobre el cambio en la cobertura del bosque de manglar en Boca Zacate, Humedal Nacional Térraba-Sierpe, Costa Rica

    Ana Margarita Silva Benavides

    2015-09-01

    Full Text Available Resumen:En los últimos sesenta años han ocurrido cambios en el Humedal Nacional Térraba-Sierpe, Costa Rica. Los cambios en la geomorfología costera están asociados a la erosión o acreción de sedimentos, lo que ha favorecido la eliminación de sectores de bosque o a la formación de bancos de sedimentos que han sido colonizados por árboles de mangle. El estudio se realizó en los sectores Bocón, Brujo e isla Coco en Boca Zacate, Humedal Nacional Térraba-Sierpe, Costa Rica, entre 2008-2013, cuyo objetivo consiste en analizar el aporte de sedimentos y las implicaciones en la cobertura del bosque de mangle en el sector de Boca Zacate. Es este estudio se realizó un análisis multitemporal de la morfología litoral con fotografías aéreas e imágenes satelitales de 1948, 1960, 1974, 1978, 1984, 1992 y 2011. Y además, se cuantificó la tasa de sedimentación mensual (g/cm2/día en los canales de los estuarios, la composición granulométrica y la concentración de elementos químicos en los sedimentos (mgL-1 en época seca y lluviosa durante los años de estudio. Los resultados indican que Boca Zacate ha mantenido en los últimos 60 años una tendencia hacia la erosión, perdiendo un 10.6 % de su espacio emergido entre 1948 y 2011 y aproximadamente un 8.9 % de su cobertura forestal; también ha experimentado una acreción en la zona de la isla Coco, uniéndose al continente por este sector. La tasa de sedimentación cuantificada en los esteros presentó diferencias con respecto al sitio y a la época. La mayor cantidad se presentó en el estero el Brujo y la menor cantidad en el estero Camíbar. Con respecto a la granulo-metría, el tipo de sedimento dominante es la arena, seguido por la arcilla y en menor cantidad el limo en todos los sitios de estudio. La mayor distribución de los elementos químicos corresponde al magnesio, calcio, potasio; mientras que el manganeso, hierro, aluminio, fósforo, zinc y cobre se encontraron en menor

  2. Francis Bacon's natural history and the Senecan natural histories of early modern Europe.

    Jalobeanu, Dana

    2012-01-01

    At various stages in his career, Francis Bacon claimed to have reformed and changed traditional natural history in such a way that his new "natural and experimental history" was unlike any of its ancient or humanist predecessors. Surprisingly, such claims have gone largely unquestioned in Baconian scholarship. Contextual readings of Bacon's natural history have compared it, so far, only with Plinian or humanist natural history. This paper investigates a different form of natural history, very popular among Bacon's contemporaries, but yet unexplored by contemporary students of Bacon's works. I have provisionally called this form of natural history'Senecan' natural history, partly because it took shape in the Neo-Stoic revival of the sixteenth-century, partly because it originates in a particular cosmographical reading of Seneca's Naturales quaestiones. I discuss in this paper two examples of Senecan natural history: the encyclopedic and cosmographical projects of Pierre de la Primaudaye (1546-1619) and Samuel Purchas (1577-1626). I highlight a number of similarities between these two projects and Francis Bacon's natural history, and argue that Senecan natural history forms an important aspect in the historical and philosophical background that needs to be taken into consideration if we want to understand the extent to which Bacon's project to reform natural history can be said to be new.

  3. Prediction of Francis Turbine Prototype Part Load Pressure and Output Power Fluctuations with Hydroelectric Model

    Alligné, S.; Nicolet, C.; Béguin, A.; Landry, C.; Gomes, J.; Avellan, F.

    2017-04-01

    The prediction of pressure and output power fluctuations amplitudes on Francis turbine prototype is a challenge for hydro-equipment industry since it is subjected to guarantees to ensure smooth and reliable operation of the hydro units. The European FP7 research project Hyperbole aims to setup a methodology to transpose the pressure fluctuations induced by the cavitation vortex rope from the reduced scale model to the prototype generating units. A Francis turbine unit of 444MW with a specific speed value of ν = 0.29, is considered as case study. A SIMSEN model of the power station including electrical system, controllers, rotating train and hydraulic system with transposed draft tube excitation sources is setup. Based on this model, a frequency analysis of the hydroelectric system is performed for all technologies to analyse potential interactions between hydraulic excitation sources and electrical components. Three technologies have been compared: the classical fixed speed configuration with Synchronous Machine (SM) and the two variable speed technologies which are Doubly Fed Induction Machine (DFIM) and Full Size Frequency Converter (FSFC).

  4. Prediction Method for the Complete Characteristic Curves of a Francis Pump-Turbine

    Wei Huang

    2018-02-01

    Full Text Available Complete characteristic curves of a pump-turbine are essential for simulating the hydraulic transients and designing pumped storage power plants but are often unavailable in the preliminary design stage. To solve this issue, a prediction method for the complete characteristics of a Francis pump-turbine was proposed. First, based on Euler equations and the velocity triangles at the runners, a mathematical model describing the complete characteristics of a Francis pump-turbine was derived. According to multiple sets of measured complete characteristic curves, explicit expressions for the characteristic parameters of characteristic operating point sets (COPs, as functions of a specific speed and guide vane opening, were then developed to determine the undetermined coefficients in the mathematical model. Ultimately, by combining the mathematical model with the regression analysis of COPs, the complete characteristic curves for an arbitrary specific speed were predicted. Moreover, a case study shows that the predicted characteristic curves are in good agreement with the measured data. The results obtained by 1D numerical simulation of the hydraulic transient process using the predicted characteristics deviate little from the measured characteristics. This method is effective and sufficient for a priori simulations before obtaining the measured characteristics and provides important support for the preliminary design of pumped storage power plants.

  5. Dynamic stresses in a Francis model turbine at deep part load

    Weber, Wilhelm; von Locquenghien, Florian; Conrad, Philipp; Koutnik, Jiri

    2017-04-01

    A comparison between numerically obtained dynamic stresses in a Francis model turbine at deep part load with experimental ones is presented. Due to the change in the electrical power mix to more content of new renewable energy sources, Francis turbines are forced to operate at deep part load in order to compensate stochastic nature of wind and solar power and to ensure grid stability. For the extension of the operating range towards deep part load improved understanding of the harsh flow conditions and their impact on material fatigue of hydraulic components is required in order to ensure long life time of the power unit. In this paper pressure loads on a model turbine runner from unsteady two-phase computational fluid dynamics simulation at deep part load are used for calculation of mechanical stresses by finite element analysis. Therewith, stress distribution over time is determined. Since only few runner rotations are simulated due to enormous numerical cost, more effort has to be spent to evaluation procedure in order to obtain objective results. By comparing the numerical results with measured strains accuracy of the whole simulation procedure is verified.

  6. A highly efficient Francis turbine designed for energy recovery in cooling towers

    Daqing Zhou

    2015-03-01

    Full Text Available In China, cooling water entering cooling towers still retains surplus pressure between 39,240 and 147,150 Pa. In order to utilize this wasted energy, it is suggested that the surplus water energy can be harnessed to drive a type of hydroturbine installed in the inner platform of cooling tower and make the fan rotate via its coupled shafts. However, conventional hydroturbines are not suited for this job because of their low efficiency or unmatched rotating speed with that of the fan under the operating conditions of cooling towers. In this article, according to the requirements of turbine work environment in cooling towers, a new type of hydroturbine, Francis turbine with ultra-low specific speed (ns  = 50 m.kW, was designed to replace the fan motor in a cooling tower. Primarily, the shape, position, and number of runner blades were designed and optimized through theoretical analyses and computational fluid dynamics simulations. Additionally, metal elliptical volute and single-row ring guide vanes were applied to scale down the structural dimensions. Finally, the optimal scheme of the new Francis turbine was proven to have a high efficiency of 88% and good operation stability through testing of a physical model and can achieve the goal of harvesting renewable energy in the cooling tower.

  7. Research on Francis Turbine Modeling for Large Disturbance Hydropower Station Transient Process Simulation

    Guangtao Zhang

    2015-01-01

    Full Text Available In the field of hydropower station transient process simulation (HSTPS, characteristic graph-based iterative hydroturbine model (CGIHM has been widely used when large disturbance hydroturbine modeling is involved. However, by this model, iteration should be used to calculate speed and pressure, and slow convergence or no convergence problems may be encountered for some reasons like special characteristic graph profile, inappropriate iterative algorithm, or inappropriate interpolation algorithm, and so forth. Also, other conventional large disturbance hydroturbine models are of some disadvantages and difficult to be used widely in HSTPS. Therefore, to obtain an accurate simulation result, a simple method for hydroturbine modeling is proposed. By this method, both the initial operating point and the transfer coefficients of linear hydroturbine model keep changing during simulation. Hence, it can reflect the nonlinearity of the hydroturbine and be used for Francis turbine simulation under large disturbance condition. To validate the proposed method, both large disturbance and small disturbance simulations of a single hydrounit supplying a resistive, isolated load were conducted. It was shown that the simulation result is consistent with that of field test. Consequently, the proposed method is an attractive option for HSTPS involving Francis turbine modeling under large disturbance condition.

  8. Velocity and pressure measurements in guide vane clearance gap of a low specific speed Francis turbine

    Thapa, B. S.; Dahlhaug, O. G.; Thapa, B.

    2016-11-01

    In Francis turbine, a small clearance gap between the guide vanes and the cover plates is usually required to pivot guide vanes as a part of governing system. Deflection of cover plates and erosion of mating surfaces causes this gap to increase from its design value. The clearance gap induces the secondary flow in the distributor system. This effects the main flow at the runner inlet, which causes losses in efficiency and instability. A guide vane cascade of a low specific speed Francis turbine has been developed for experimental investigations. The test setup is able to produce similar velocity distributions at the runner inlet as that of a reference prototype turbine. The setup is designed for particle image velocimetry (PIV) measurements from the position of stay vane outlet to the position of runner inlet. In this study, velocity and pressure measurements are conducted with 2 mm clearance gap on one side of guide vane. Leakage flow is observed and measured together with pressure measurements. It is concluded that the leakage flow behaves as a jet and mixes with the main flow in cross-wise direction and forms a vortex filament. This causes non-uniform inlet flow conditions at runner blades.

  9. On the performance of a high head Francis turbine at design and off-design conditions

    Aakti, B; Amstutz, O; Casartelli, E; Romanelli, G; Mangani, L

    2015-01-01

    In the present paper, fully 360 degrees transient and steady-state simulations of a Francis turbine were performed at three operating conditions, namely at part load (PL), best efficiency point (BEP), and high load (HL), using different numerical approaches for the pressure-velocity coupling. The simulation domain includes the spiral casing with stay and guide vanes, the runner and the draft tube. The main target of the investigations is the numerical prediction of the overall performance of the high head Francis turbine model as well as local and integral quantities of the complete machine in different operating conditions. All results were compared with experimental data published by the workshop organization. All CFD simulations were performed at model scale with a new in-house, 3D, unstructured, object-oriented finite volume code within the framework of the open source OpenFOAM library. The novel fully coupled pressure-based solver is designed to solve the incompressible RANS- Equations and is capable of handling multiple references of frame (MRF). The obtained results show that the overall performance is well captured by the simulations. Regarding the local flow distributions within the inlet section of the draft-tube, the axial velocity is better estimated than the circumferential component

  10. Study on stress characteristics of Francis hydraulic turbine runner based on two-way FSI

    Zhu, W R; Xiao, R F; Yang, W; Wang, F J; Liu, J

    2012-01-01

    In recent years, cracking phenomenon occurs in many large-sized turbines both nationally and internationally, which has threatened the stable operation of hydraulic turbines. Consequently, Stress characteristics calculation and analysis of a Francis hydraulic turbine runner by application of fluid-structure interaction (FSI) technology become significantly important. In order to introduce two-way coupling technology to hydraulic machinery, two-way FSI technology is applied in this article to calculate and analyze stress characteristics. Through coordinate system transformation, the continuity equations and Navier-Stokes equations in the Cartesian coordinates system are firstly transformed to ALE coordinates system. The fluid field control equations are then constructed and discrete equations can be obtained by using flow-condition-based interpolation (FBIC-C). The structure static mechanics equations used are established in rotation coordinate system, and modeled with the finite method. Two-way coupling is computed by using iteration method. The fluid equations and structure equations are iterated until coupling coefficients converge. According to structure result, the maximum stress, displacement as well as its location can be found. As a result, the most easily wear position can be discovered which provides valuable basis for optimized design and stable operation of Francis hydraulic turbines. After comparing the results with that of one-way coupling, it is discovered that displacements is the key factors which affects the results of one-way and two-way coupling.

  11. On the centenary of the birth of Francis H. C. Crick – from physics to genetics and neuroscience

    Hélio A. G. Teive

    2016-04-01

    Full Text Available ABSTRACT The year 2016 marks the centenary of the birth of Francis Crick (1916–2004, who made outstanding contributions to genetics and neuroscience. In 1953, in a collaborative study, Francis Crick and James Watson discovered the DNA double helix, and in 1962 they and Maurice Wilkins were awarded the Noble Prize in Physiology or Medicine. Crick subsequently became very interested in neuroscience, particularly consciousness and its relationship to the claustrum, a small gray matter structure between the insula and putamen.

  12. Temporal stability of the Francis Scale of Attitude toward Christianity short-form: test-retest data over one week.

    Lewis, Christopher Alan; Cruise, Sharon Mary; McGuckin, Conor

    2005-04-01

    This study evaluated the test-retest reliability of the Francis Scale of Attitude toward Christianity short-form. 39 Northern Irish undergraduate students completed the measure on two occasions separated by one week. Stability across the two administrations was high, r = .92, and there was no significant change between Time 1(M = 25.2, SD = 5.4) and Time 2 (M = 25.7, SD = 6.2). These data support the short-term test-retest reliability of the Francis Scale of Attitude toward Christianity short-form.

  13. Aesthetic of the subversion and the violence in Francis Bacon and Frida Kahlo’s WorKs of Art

    Catarina Pinheiro

    2014-06-01

    Full Text Available Having Frida Kahlo and Francis Bacon ́s work as a starting point, the authors discuss the dimensions of violence and trauma present in their creative forms and on the impact produced on the spectator. They also reflect on its connections with the clinic on the impact/countertransference phenomenon and its transformational possibilities.

  14. Internal consistency reliability and construct validity of the Dutch translation of the Francis Scale of Attitude toward Christianity among adolescents.

    Francis, L J; Hermans, C A

    2000-02-01

    A sample of 1,021 young people attending Years 7, 8, 9, 10, and 11 at Catholic secondary schools within the state-maintained sector completed the Dutch translation of the Francis Scale of Attitude toward Christianity. The data support its reliability and validity and commend it for further use in studies conducted among young people in The Netherlands.

  15. Aesthetic of the subversion and the violence in Francis Bacon and Frida Kahlo’s WorKs of Art

    Pinheiro, Catarina; Dias, Maria João; Rosa, Alda

    2009-01-01

    Having Frida Kahlo and Francis Bacon ́s work as a starting point, the authors discuss the dimensions of violence and trauma present in their creative forms and on the impact produced on the spectator. They also reflect on its connections with the clinic on the impact/countertransference phenomenon and its transformational possibilities.

  16. Aesthetic of the subversion and the violence in Francis Bacon and Frida Kahlo’s WorKs of Art

    Catarina Pinheiro; Maria João Dias; Alda Rosa

    2014-01-01

    Having Frida Kahlo and Francis Bacon ́s work as a starting point, the authors discuss the dimensions of violence and trauma present in their creative forms and on the impact produced on the spectator. They also reflect on its connections with the clinic on the impact/countertransference phenomenon and its transformational possibilities.

  17. Measuring Attitude toward Theistic Faith: Assessing the Astley-Francis Scale among Christian, Muslim and Secular Youth in England

    Francis, Leslie J.; Brockett, Adrian; Village, Andrew

    2013-01-01

    Alongside a family of instruments designed to measure the attitudinal dimension of religion within specific faith contexts (Christianity, Hinduism, Islam, and Judaism), the Astley-Francis Scale of Attitude toward Theistic Faith was designed to assess the attitudinal dimension of religion within a multifaith context. Drawing on a sample of 4338…

  18. Francis Bacon's concept of objectivity and the idols of the mind.

    Zagorin, P

    2001-12-01

    This paper examines the concept of objectivity traceable in Francis Bacon's natural philosophy. After some historical background on this concept, it considers the question of whether it is not an anachronism to attribute such a concept to Bacon, since the word 'objectivity' is a later coinage and does not appear anywhere in his writings. The essay gives reasons for answering this question in the negative, and then criticizes the accounts given of Bacon's understanding of objectivity by Lorraine Daston and Julie Robin Solomon. It argues that this understanding is most directly and fully expressed in his discussion of the idols of the mind. In this connection, the paper notes Bacon's critical attitude to sixteenth-century scepticism and its relevance to the idea of objectivity implicit in his comments on the idols. In conclusion, the paper argues that Bacon was not a pure empiricist and describes the place assigned to theories and hypotheses in his natural philosophy.

  19. Images of trauma: pain, recognition, and disavowal in the works of Frida Kahlo and Francis Bacon.

    Bose, Joerg

    2005-01-01

    The role of art in the encounter with trauma and destructiveness is comparatively studied in the works of Frida Kahlo and Francis Bacon as examples of a direct and a more indirect way of dealing with such experiences. A creative product may function intrapsychically as a kind of messenger between dissociated self-states and consciousness, and it may also serve as a witnessing presence in a self-supporting and self-constituting way. Artistic work may thus be used by the artist for an expressive as well as for a protective purpose, as a means of sympathetic participation in painful experience, or as a medium for a view from the outside. The act itself of finding and of making expressive forms at the time of traumatic experience is a remarkable assertion of the human capability to synthesize and to counteract fragmenting dissociative processes.

  20. Special article: Francis Hoeffer McMechan, MD: creator of modern anesthesiology?

    Bacon, Douglas R

    2012-12-01

    If one person can be credited with the creation of the infrastructure of modern anesthesiology, that individual would be Francis Hoeffer McMechan. He has been largely forgotten since his death in 1939 despite his remarkable and enduring accomplishments. McMechan edited the first national journal devoted to anesthesiology, created and managed almost all of the national and regional societies devoted to the specialty between 1912 and his death, and created the first international physician certification as a specialist in anesthesiology. His accomplishments are even more amazing given the severe arthritis that left him wheelchair-bound for almost his entire professional life and denied him the ability to practice anesthesia. Our specialty owes an incredible debt to this largely unknown and unsung hero.

  1. Scanning-PIXE analysis of gold lace embroideries in a relic of St. Francis

    Migliori, A. [Dipartimento di Fisica dell' Universita and Istituto Nazionale di Fisica Nucleare, Firenze, Via G. Sansone 1, 50019 Sesto Fiorentino (Firenze) (Italy)], E-mail: migliori@fi.infn.it; Grassi, N.; Mando, P.A. [Dipartimento di Fisica dell' Universita and Istituto Nazionale di Fisica Nucleare, Firenze, Via G. Sansone 1, 50019 Sesto Fiorentino (Firenze) (Italy)

    2008-05-15

    In this work, we describe the compositional analysis performed by scanning-mode PIXE on the metal threads of a XIII century embroidery. The precious work analysed is the pillow-case used to cover the pillow, on which - according to tradition - St. Francis of Assisi was resting his head when he died. Measurements were performed in order to characterise the embroideries of the two sides and the passementerie in the lateral hems. Several areas, each of the order of two square millimetres, were scanned with a 3 MeV proton external beam of 20 {mu}m size on target, using the external micro-beam facility of our laboratory, with list-mode acquisition. Analysis of elemental maps and spectra from selected homogeneous sub-areas allowed us to extract the quantitative composition of the gilded tape and estimates of its thickness.

  2. Scanning-PIXE analysis of gold lace embroideries in a relic of St. Francis

    Migliori, A.; Grassi, N.; Mando, P.A.

    2008-01-01

    In this work, we describe the compositional analysis performed by scanning-mode PIXE on the metal threads of a XIII century embroidery. The precious work analysed is the pillow-case used to cover the pillow, on which - according to tradition - St. Francis of Assisi was resting his head when he died. Measurements were performed in order to characterise the embroideries of the two sides and the passementerie in the lateral hems. Several areas, each of the order of two square millimetres, were scanned with a 3 MeV proton external beam of 20 μm size on target, using the external micro-beam facility of our laboratory, with list-mode acquisition. Analysis of elemental maps and spectra from selected homogeneous sub-areas allowed us to extract the quantitative composition of the gilded tape and estimates of its thickness

  3. Scanning-PIXE analysis of gold lace embroideries in a relic of St. Francis

    Migliori, A.; Grassi, N.; Mandò, P. A.

    2008-05-01

    In this work, we describe the compositional analysis performed by scanning-mode PIXE on the metal threads of a XIII century embroidery. The precious work analysed is the pillow-case used to cover the pillow, on which - according to tradition - St. Francis of Assisi was resting his head when he died. Measurements were performed in order to characterise the embroideries of the two sides and the passementerie in the lateral hems. Several areas, each of the order of two square millimetres, were scanned with a 3 MeV proton external beam of 20 μm size on target, using the external micro-beam facility of our laboratory, with list-mode acquisition. Analysis of elemental maps and spectra from selected homogeneous sub-areas allowed us to extract the quantitative composition of the gilded tape and estimates of its thickness.

  4. Adam Smith e Francis Ysidro Edgeworth: uma crítica do utilitarismo

    Solange Regina Marin

    2012-01-01

    Full Text Available Sugerimos, nesse trabalho, a investigação das concepções de Adam Smith e a de Francis Ysidro Edgeworth do utilitarismo. Ambas as concepções foram utilizadas para desenvolver a Ciência Econômica. Porém, também apresentaram as limitações da teoria econômica, cujas fronteiras vislumbradas pelos autores remetem para a necessidade de avaliar as ações e condutas humanas com teoria moral diferente do utilitarismo. Entendemos que a teoria moral de Adam Smith, esquecida pela história do pensamento econômico, se apresenta como alternativa e, em decorrência, uma ideia promissora para aperfeiçoar o estudo das ações e condutas ditas econômicas.

  5. Unsteady hydraulic simulation of the cavitating part load vortex rope in Francis turbines

    Brammer, J.; Segoufin, C.; Duparchy, F.; Lowys, P. Y.; Favrel, A.; Avellan, F.

    2017-04-01

    For Francis turbines at part load operation a helical vortex rope is formed due to the swirling nature of the flow exiting the runner. This vortex creates pressure fluctuations which can lead to power swings, and the unsteady loading can lead to fatigue damage of the runner. In the case that the vortex rope cavitates there is the additional risk that hydro-acoustic resonance can occur. It is therefore important to be able to accurately simulate this phenomenon to address these issues. In this paper an unsteady, multi-phase CFD model was used to simulate two part-load operating points, for two different cavitation conditions. The simulation results were validated with test-rig data, and showed very good agreement. These results also served as an input for FEA calculations and fatigue analysis, which are presented in a separate study.

  6. Classics in psychiatry and the law: Francis Wharton on involuntary confessions.

    Weiss, Kenneth J

    2012-01-01

    Philadelphia attorney Francis Wharton was a key intellectual figure in linking the sciences of medicine and law. In 1860, he published a monograph on involuntary confessions, which represented the closing chapter of Wharton and Stillé's Treatise on Medical Jurisprudence. He had already published A Monograph on Mental Unsoundness in 1855, the first book of the Treatise in its first edition. Wharton was convinced that many criminals had an inner compulsion to confess or to be caught, explained as divine jurisprudence. His remarks on confessions include a typology spanning psychodynamics to police tactics, using contemporaneous, historical, and literary examples. This remarkable document provides insight into the dynamics of unintended and involuntary confessions and is compatible, in part, with current scholarship. The author contrasts Wharton's schema with those of his English predecessor Jeremy Bentham, the psychoanalyst Theodore Reik, and others, and concludes that it represents an important transition toward a psychological approach to the criminology of confessions.

  7. From political economy to sociology: Francis Galton and the social-scientific origins of eugenics.

    Renwick, Chris

    2011-09-01

    Having coined the word 'eugenics' and inspired leading biologists and statisticians of the early twentieth century, Francis Galton is often studied for his contributions to modern statistical biology. However, whilst documenting this part of his work, historians have frequently neglected crucial aspects of what motivated Galton to establish his eugenics research programme. Arguing that his work was shaped more by social than by biological science, this paper addresses these oversights by tracing the development of Galton's programme, from its roots in a debate about political economy to his appeals for it to be taken up by sociologists. In so doing, the paper not only returns Galton's ideas to their original context but also provides a reason to reflect on the place of the social sciences in history-of-science scholarship.

  8. Modelling and Internal Fuzzy Model Power Control of a Francis Water Turbine

    Klemen Nagode

    2014-02-01

    Full Text Available This paper presents dynamic modelling of a Francis turbine with a surge tank and the control of a hydro power plant (HPP. Non-linear and linear models include technical parameters and show high similarity to measurement data. Turbine power control with an internal model control (IMC is proposed, based on a turbine fuzzy model. Considering appropriate control responses in the entire area of turbine power, the model parameters of the process are determined from a fuzzy model, which are further included in the internal model controller. The results are compared to a proportional-integral (PI controller tuned with an integral absolute error (IAE objective function, and show an improved response of internal model control.

  9. A world in one dimension: Linus Pauling, Francis Crick and the central dogma of molecular biology.

    Strasser, Bruno J

    2006-01-01

    In 1957, Francis Crick outlined a startling vision of life in which the great diversity of forms and shapes of macromolecules was encoded in the one-dimensional sequence of nucleic acids. This paper situates Crick's new vision in the debates of the 1950s about protein synthesis and gene action. After exploring the reception of Crick's ideas, it shows how they differed radically from a different model of protein synthesis which enjoyed wide currency in that decade. In this alternative model, advocated by Linus Pauling and other luminaries, three-dimensional templates directed the folding of proteins. Even though it was always considered somewhat speculative, this theory was supported by a number of empirical results originating in different experimental systems. It was eventually replaced by a model in which the forms and shapes of macromolecules resulted solely from their amino acid sequence, dramatically simplifying the problem of protein synthesis which Crick was attempting to solve in 1957.

  10. Numerical investigation of flow structure and pressure pulsation in the Francis-99 turbine during startup

    Minakov, A.; Sentyabov, A.; Platonov, D.

    2017-01-01

    We performed numerical simulation of flow in a laboratory model of a Francis hydroturbine at startup regimes. Numerical technique for calculating of low frequency pressure pulsations in a water turbine is based on the use of DES (k-ω Shear Stress Transport) turbulence model and the approach of “frozen rotor”. The structure of the flow behind the runner of turbine was analysed. Shows the effect of flow structure on the frequency and intensity of non-stationary processes in the flow path. Two version of the inlet boundary conditions were considered. The first one corresponded measured time dependence of the discharge. Comparison of the calculation results with the experimental data shows the considerable delay of the discharge in this calculation. Second version corresponded linear approximation of time dependence of the discharge. This calculation shows good agreement with experimental results.

  11. The Southern Society for Philosophy and Psychology and Francis Cecil Sumner.

    Thomas, Roger K

    2011-01-01

    In 1939, a psychologist could become a member of the Southern Society for Philosophy and Psychology (SSPP) automatically with the endorsement of two members, payment of dues, and membership in the American Psychological Association (APA). Non-APA members with endorsements and payment of dues had to be voted in by the membership. In 1940, the rules for admission were changed to eliminate the automatic membership for APA members. Francis Cecil Sumner, the first African American PhD in psychology, qualified for SSPP membership as a member of the APA in 1939, but the SSPP's council delayed his membership and introduced the amendment to its constitution that eliminated Sumner's route to membership. This article examines the circumstances surrounding council's actions and the role that Sumner's application for membership played in it as an example of the role that race and discrimination played in the decision to change the route to SSPP membership for members of the APA.

  12. The Welcoming Pope: Images of Pope Francis in the Catholicism under mediatization

    Tatiane MILANI

    2017-12-01

    Full Text Available In the context of the society in mediatization more and more the social fields are inserted in an ambiance in which borders are constantly tensioned, meaning that social practices are crossed by the logic of other fields, rather than their own place of knowing. It is perceived that the social/political/religious conjuncture interpenetrates with the logic of mediatization, and this phenomenon arouses transformations in all Christianity. The objective of this work is to analyze the circulation of Pope Francis' images in the media which formulate, in the collective imaginary, a mediated totem image of the Pope of embrace or of the welcoming Pope, what adheres to the new media technologies.

  13. On the upper part load vortex rope in Francis turbine: Experimental investigation

    Nicolet, C; Zobeiri, A; Maruzewski, P; Avellan, F

    2010-01-01

    The swirling flow developing in Francis turbine draft tube under part load operation leads to pressure fluctuations usually in the range of 0.2 to 0.4 times the runner rotational frequency resulting from the so-called vortex breakdown. For low cavitation number, the flow features a cavitation vortex rope animated with precession motion. Under given conditions, these pressure fluctuations may lead to undesirable pressure fluctuations in the entire hydraulic system and also produce active power oscillations. For the upper part load range, between 0.7 and 0.85 times the best efficiency discharge, pressure fluctuations may appear in a higher frequency range of 2 to 4 times the runner rotational speed and feature modulations with vortex rope precession. It has been pointed out that for this particular operating point, the vortex rope features elliptical cross section and is animated of a self-rotation. This paper presents an experimental investigation focusing on this peculiar phenomenon, defined as the upper part load vortex rope. The experimental investigation is carried out on a high specific speed Francis turbine scale model installed on a test rig of the EPFL Laboratory for Hydraulic Machines. The selected operating point corresponds to a discharge of 0.83 times the best efficiency discharge. Observations of the cavitation vortex carried out with high speed camera have been recorded and synchronized with pressure fluctuations measurements at the draft tube cone. First, the vortex rope self rotation frequency is evidenced and the related frequency is deduced. Then, the influence of the sigma cavitation number on vortex rope shape and pressure fluctuations is presented. The waterfall diagram of the pressure fluctuations evidences resonance effects with the hydraulic circuit. The time evolution of the vortex rope volume is compared with pressure fluctuations time evolution using image processing. Finally, the influence of the Froude number on the vortex rope shape and

  14. On the upper part load vortex rope in Francis turbine: Experimental investigation

    Nicolet, C [Power Vision Engineering sarl Ch. des Champs-Courbes 1, CH-1024 Ecublens (Switzerland); Zobeiri, A; Maruzewski, P; Avellan, F, E-mail: christophe.nicolet@powervision-eng.c [Laboratory for Hydraulic Machines, Ecole polytechnique federale de Lausanne, EPFL Av. de Cour 33bis, CH-1007 Lausanne (Switzerland)

    2010-08-15

    The swirling flow developing in Francis turbine draft tube under part load operation leads to pressure fluctuations usually in the range of 0.2 to 0.4 times the runner rotational frequency resulting from the so-called vortex breakdown. For low cavitation number, the flow features a cavitation vortex rope animated with precession motion. Under given conditions, these pressure fluctuations may lead to undesirable pressure fluctuations in the entire hydraulic system and also produce active power oscillations. For the upper part load range, between 0.7 and 0.85 times the best efficiency discharge, pressure fluctuations may appear in a higher frequency range of 2 to 4 times the runner rotational speed and feature modulations with vortex rope precession. It has been pointed out that for this particular operating point, the vortex rope features elliptical cross section and is animated of a self-rotation. This paper presents an experimental investigation focusing on this peculiar phenomenon, defined as the upper part load vortex rope. The experimental investigation is carried out on a high specific speed Francis turbine scale model installed on a test rig of the EPFL Laboratory for Hydraulic Machines. The selected operating point corresponds to a discharge of 0.83 times the best efficiency discharge. Observations of the cavitation vortex carried out with high speed camera have been recorded and synchronized with pressure fluctuations measurements at the draft tube cone. First, the vortex rope self rotation frequency is evidenced and the related frequency is deduced. Then, the influence of the sigma cavitation number on vortex rope shape and pressure fluctuations is presented. The waterfall diagram of the pressure fluctuations evidences resonance effects with the hydraulic circuit. The time evolution of the vortex rope volume is compared with pressure fluctuations time evolution using image processing. Finally, the influence of the Froude number on the vortex rope shape and

  15. On the upper part load vortex rope in Francis turbine: Experimental investigation

    Nicolet, C.; Zobeiri, A.; Maruzewski, P.; Avellan, F.

    2010-08-01

    The swirling flow developing in Francis turbine draft tube under part load operation leads to pressure fluctuations usually in the range of 0.2 to 0.4 times the runner rotational frequency resulting from the so-called vortex breakdown. For low cavitation number, the flow features a cavitation vortex rope animated with precession motion. Under given conditions, these pressure fluctuations may lead to undesirable pressure fluctuations in the entire hydraulic system and also produce active power oscillations. For the upper part load range, between 0.7 and 0.85 times the best efficiency discharge, pressure fluctuations may appear in a higher frequency range of 2 to 4 times the runner rotational speed and feature modulations with vortex rope precession. It has been pointed out that for this particular operating point, the vortex rope features elliptical cross section and is animated of a self-rotation. This paper presents an experimental investigation focusing on this peculiar phenomenon, defined as the upper part load vortex rope. The experimental investigation is carried out on a high specific speed Francis turbine scale model installed on a test rig of the EPFL Laboratory for Hydraulic Machines. The selected operating point corresponds to a discharge of 0.83 times the best efficiency discharge. Observations of the cavitation vortex carried out with high speed camera have been recorded and synchronized with pressure fluctuations measurements at the draft tube cone. First, the vortex rope self rotation frequency is evidenced and the related frequency is deduced. Then, the influence of the sigma cavitation number on vortex rope shape and pressure fluctuations is presented. The waterfall diagram of the pressure fluctuations evidences resonance effects with the hydraulic circuit. The time evolution of the vortex rope volume is compared with pressure fluctuations time evolution using image processing. Finally, the influence of the Froude number on the vortex rope shape and

  16. Prediction of a Francis turbine prototype full load instability from investigations on the reduced scale model

    Alligné, S.; Maruzewski, P.; Dinh, T.; Wang, B.; Fedorov, A.; Iosfin, J.; Avellan, F.

    2010-08-01

    The growing development of renewable energies combined with the process of privatization, lead to a change of economical energy market strategies. Instantaneous pricings of electricity as a function of demand or predictions, induces profitable peak productions which are mainly covered by hydroelectric power plants. Therefore, operators harness more hydroelectric facilities at full load operating conditions. However, the Francis Turbine features an axi-symmetric rope leaving the runner which may act under certain conditions as an internal energy source leading to instability. Undesired power and pressure fluctuations are induced which may limit the maximum available power output. BC Hydro experiences such constraints in a hydroelectric power plant consisting of four 435 MW Francis Turbine generating units, which is located in Canada's province of British Columbia. Under specific full load operating conditions, one unit experiences power and pressure fluctuations at 0.46 Hz. The aim of the paper is to present a methodology allowing prediction of this prototype's instability frequency from investigations on the reduced scale model. A new hydro acoustic vortex rope model has been developed in SIMSEN software, taking into account the energy dissipation due to the thermodynamic exchange between the gas and the surrounding liquid. A combination of measurements, CFD simulations and computation of eigenmodes of the reduced scale model installed on test rig, allows the accurate calibration of the vortex rope model parameters at the model scale. Then, transposition of parameters to the prototype according to similitude laws is applied and stability analysis of the power plant is performed. The eigenfrequency of 0.39 Hz related to the first eigenmode of the power plant is determined to be unstable. Predicted frequency of the full load power and pressure fluctuations at the unit unstable operating point is found to be in general agreement with the prototype measurements.

  17. Prediction of a Francis turbine prototype full load instability from investigations on the reduced scale model

    Alligne, S; Maruzewski, P; Avellan, F; Dinh, T; Wang, B; Fedorov, A; Iosfin, J

    2010-01-01

    The growing development of renewable energies combined with the process of privatization, lead to a change of economical energy market strategies. Instantaneous pricings of electricity as a function of demand or predictions, induces profitable peak productions which are mainly covered by hydroelectric power plants. Therefore, operators harness more hydroelectric facilities at full load operating conditions. However, the Francis Turbine features an axi-symmetric rope leaving the runner which may act under certain conditions as an internal energy source leading to instability. Undesired power and pressure fluctuations are induced which may limit the maximum available power output. BC Hydro experiences such constraints in a hydroelectric power plant consisting of four 435 MW Francis Turbine generating units, which is located in Canada's province of British Columbia. Under specific full load operating conditions, one unit experiences power and pressure fluctuations at 0.46 Hz. The aim of the paper is to present a methodology allowing prediction of this prototype's instability frequency from investigations on the reduced scale model. A new hydro acoustic vortex rope model has been developed in SIMSEN software, taking into account the energy dissipation due to the thermodynamic exchange between the gas and the surrounding liquid. A combination of measurements, CFD simulations and computation of eigenmodes of the reduced scale model installed on test rig, allows the accurate calibration of the vortex rope model parameters at the model scale. Then, transposition of parameters to the prototype according to similitude laws is applied and stability analysis of the power plant is performed. The eigenfrequency of 0.39 Hz related to the first eigenmode of the power plant is determined to be unstable. Predicted frequency of the full load power and pressure fluctuations at the unit unstable operating point is found to be in general agreement with the prototype measurements.

  18. Community participation in the Gulf of Uraba: The Case of Bocas del Atrato township and the village of El Roto, municipality of Turbo, Antioquia

    Taborda M, Alexander; Maldonado L, Carolina; Palacio, Jaime

    2008-01-01

    The text sets out from the study of socio cultural aspects and particularly addressing on community participation, the results of a pilot aquaculture project to breed snook (C. undecimalis ) and tarpon (Megalops atlanticus) in The Corregimiento Bocas del Atrato and The Vereda El Roto, Municipality of Turbo, Antioquia. Interdisciplinary work that seeks to generate scientific knowledge tools to assist in mitigating the decline of fish resource in which is based the livelihood of these people, through Participatory Action Research methods. We analyze some socioeconomic and cultural aspects of these communities that influenced the development of the project, along with reflections on the experiences, by way of recommendations for future work such as a call to self critical review of what is the practice interdisciplinary projects of intervention within the framework of sustainable development. The research was conducted between January 2007 and June 2008.

  19. Alimentación, salud y pobreza en áreas marginadas urbanas: caso Veracruz-Boca del Río, Veracruz, México

    Ana Lid Del Ángel-Pérez; José Alfredo Villagómez-Cortés

    2014-01-01

    Se caracterizó la alimentación en 120 hoga - res en áreas marginadas en Veracruz-Boca del Río, México, mediante el Indice de Di - versidad Dietética y su asociación con varia - bles socioeconómicas. Los hogares se clasifi - caron en cuatro niveles socioeconómicos, 99% se ubicó en situación de pobreza. De 52% a 71% del ingreso familiar se gasta en alimentos. En la dieta prevalecen alimentos con alto contenido calórico, proteína animal de baja calidad y bajo consumo de frutas y verduras. La div...

  20. Larvas de Sergestes arcticus Kroyer, 1855, Neotrypaea uncinata (H. Milne-Edwards, 1837 y Munida gregaria (Fabricius, 1793, entre el seno Reloncaví y Boca del Guafo, sur de Chile Larvae of Sergestes arcticus Kroyer, 1855, Neotrypaea uncinata (H. Milne-Edwards, 1837, and Munida gregaria (Fabricius, 1793 between Seno Reloncaví and Boca del Guafo, southern Chile

    Armando Mujica

    2011-01-01

    Full Text Available Se analiza la distribución de los estados de desarrollo de las larvas de Sergestes arcticus, Neotrypaea uncinata y Munida gregaria, capturadas entre el seno Reloncaví y la Boca del Guafo, durante noviembre de 2004. Se distinguieron tres zonas oceanógraficas, de acuerdo a los antecedentes relacionados con el grado de participación de aguas continentales y oceánicas. La distribución de las larvas de estas especies y sus estados de desarrollo, permitieron establecer diferencias significativas entre ellas respecto de las características oceanógraficas, lo que estaría relacionado con los lugares de desove y habitat de las poblaciones desovantes en el área de estudio.The distribution of developmental stages of Sergestes arcticus, Neotrypaea uncinata and Munida gregaria larvae caught between Seno Reloncaví and Boca del Guafo in November 2004 was analyzed. Three oceanographic zones were distinguished according to records showing the degree of participation of continental and oceanic waters. Significant differences were determined between larval distribution and development stages for these species with respect to oceanographic characteristics; said differences might be related to the spawning sites and the habitat of the spawning stock in the study area.

  1. Características clínico-epidemiológicas no carcinoma espinocelular de boca e orofaringe Clinic and epidemiologic characteristics in the with squamous cell carcinoma of the mouth and oropharynx

    Rogério A. Dedivitis

    2004-01-01

    ós radioterapia e 4% a cirurgia exclusiva e 8% tiveram segundo primário. Não houve relação estatisticamente significativa entre o estadiamento e os hábitos de tabagismo, etilismo e uso de prótese. Tais hábitos, a faixa etária e o grau histológico não tiveram relação significativa com o sítio do tumor. Estavam vivos e livres de doença 69,7% dos pacientes com tumor de boca e 22% de orofaringe. CONCLUSÃO: O médico ou dentista que dá o atendimento inicial é fundamental no reconhecimento das lesões, para que se possa estabelecer o diagnóstico precoce.Cancer of the oral cavity and oropharynx is aggressive. It is one of the commonest cancers in Brazil and may be considered as the commonest in the head and neck. AIM: The objective of this paper is to evaluate clinical and epidemiological factors and the outcome. STUDY DESIGN: Clinical retrospective. MATERIAL AND METHODS: In a descriptive retrospective study, the charts of 43 cases of oral and 25 of oropharyngeal squamous cell carcinoma (SCC in the period 1997-2000 have been reviewed from the Departments of Head and Neck Surgery of Santa Casa de Misericórdia de Santos and Hospital Ana Costa. This was analyzed with emphasis on age, gender, profession, ethnic aspects, tobacco and alcohol use, dental prosthesis, referement origin, site of the lesion, clinical staging, histologic grade, treatment methods, survival and second cancer presence in the study group. The data were analysed by Exact Test of Fischer. RESULTS: In the oral cavity cancer patients, a male female ratio of 3.35:1 was observed, the median age was 62 years (ranging 46 to 91 years, 90.7% were Caucasian, 81% were referred from medical professionals, tobacco use was identified in 76.8%, alcohol intake in 74%, 79% were not dental prosthesis users, tongue was the commonest site identified (51.1%, 53% were staged as III and IV clinical stages, 72.1% were moderately differentiated SCC, combined modality of treatment (surgery and adjuvant radiation therapy was

  2. Sir Francis Joseph Campbell and His Family: The First Family in Professional Services for People Who Are Blind or Visually Impaired

    Welsh, Richard L.

    2008-01-01

    The author discusses the pivotal roles of Sir Francis Campbell (1832-1914) and members of his family, especially his son Charles Campbell, in the evolution of the blindness field to a professional and reason-based service.

  3. On the physical mechanisms governing self-excited pressure surge in Francis turbines

    Müller, A; Favrel, A; Landry, C; Yamamoto, K; Avellan, F

    2014-01-01

    The required operating range for hydraulic machines is continually extended in an effort to integrate renewable energy sources with unsteady power outputs into the existing electrical grid. The off-design operation however brings forth unfavorable flow patterns in the machine, causing dynamic problems involving cavitation, which may represent a limiting factor to the energy production. In Francis turbines it is observed that the self-excited oscillation of a vortex rope in the draft tube cone prevents the delivery of maximum power when required. This phenomenon is referred to as full load pressure surge and has been the object of extensive research during the past decades. Several contributions deepened its understanding through measurement and simulation of the local flow properties and the global stability parameters. The draft tube pressure level and the runner outlet swirl are identified as key variables in the modelling of the vortex rope dynamics. Recently, a cyclic appearance of blade cavitation has been observed at overload conditions in a multiphase numerical simulation coupling the runner and the draft tube. From the analysis of the simulation it becomes obvious that the cyclic appearance of blade cavitation has a direct effect on the runner outlet swirl, thus introducing an additional interaction mechanism that is not accounted for in formerly published models. For the presented work, the results of this numerical study are confirmed experimentally on a reduced scale model of a Francis turbine. Several wall pressure measurements in the draft tube cone are performed, together with high speed visualizations of the vortex rope and the blade cavitation. The flow swirl is calculated based on Laser Doppler Velocimetry measurements. A possible mechanism explaining the coupling between the self-excited pressure and vortex rope oscillation and the cyclic appearance of the blade cavitation is proposed. Furthermore, the streamwise propagation speed of the flow

  4. On the sloshing free surface in the draft tube cone of a Francis turbine operating in synchronous condenser mode

    Vagnoni, E.; Andolfatto, L.; Avellan, F.

    2017-04-01

    Hydropower plants may be required to operate in synchronous condenser mode in order to supply reactive power to the grid for compensating the fluctuations introduced by the intermittent renewable energies such wind and solar. When operating in this mode, the tail water in the Francis turbine or pump-turbine is depressed below the runner by injecting pressurized air in order to spin in air to reduce the power consumption. Many air-water interaction phenomena occur in the machine causing air losses and a consequent power consumption to recover the air lost. In this paper, the experimental investigation of the sloshing motion in the cone of a dewatered Francis turbine performed by image visualization and pressure measurements is presented. The developed image post processing method for identifying the amplitude and frequency of the oscillation of the free surface is described and the results obtained are illustrated and discussed.

  5. Fukuyama : kõigepealt hea valitsus, siis demokraatia ja ajaloo lõpp / Francis Fukuyama ; interv. Nathan Gardels

    Fukuyama, Francis

    2005-01-01

    Francis Fukuyama sõnul vajab riik oma arenguks esmajoones head valitsemist. Kõige olulisem on, et oleks toimiv riik, mis suudab tagada julgeoleku ja majandusarengu elementaarsed tingimused. Iraagi praeguste probleemide põhjus on selles, et USA ei suutnud ette näha, kuidas riik Saddami kukkudes kokku variseb, kuid tuleb mõista, et aeg-ajalt on USA ja kogu maailma huvides kusagil maailma nurgas riigi ehitamine tõsiselt ette võtta, ütleb autor

  6. Fútbol global e identidades nacionales en 1925: la gira del Club Atlético Boca Juniors en España a través de su impacto en la prensa

    Juan Antonio Simón

    2016-07-01

    Full Text Available What role did football play during the dictatorship of Primo de Rivera (1923-1930 in Spain? This is one of the questions that this article attempts to resolve. Its objective is to present the impact of the first visit to Spain on the part of an Argentine club, the Boca Juniors Athletic Club, as reported in the Spanish press in 1925. At the methodological level, a review was done of the general bibliography and of the main Spanish magazines and newspapers, both in terms of sports and general information. It demonstrates, as its general conclusion, the interest that the Boca Juniors’ tour sparked among Spanish and Argentinian fans alike, showing this to be an occasion for asserting both national identity and global relations through football.

  7. Legalización de derecho de vía y obtención de permisos para la construcción del gasoducto de 36"ø x 68.7 Km Dos Bocas - Cactus

    Juan López, Omar

    2002-01-01

    Actualmente el transporte y distribución del gas de baja presión que arriba a la Terminal Marítima Dos Bocas, es manejado a través del "Gasoducto de 36"ø Dos Bocas - Cunduacán", este sistema de tuberías ha cumplido su período de vida útil con la que fue diseñada. Principalmente por esta situación y por problemas de integridad estructural y aunado a los pronósticos de producción de la entrada en operación del Activo Litoral de Tabasco, es necesario sustituir este gasoducto...

  8. Numerical analysis of solid–liquidtwo-phase turbulent flow in Francis turbine runner with splitter bladesin sandy water

    Hua Hong

    2015-03-01

    Full Text Available As the key component of a hydroelectric power generation system, hydraulic turbine plays a decisive role in the overall performance of the system. There are many sandy rivers in the world, and turbines working in these rivers are seriously damaged. Therefore, the research of flow in sandy water has great theoretical significance and practical value. Based on the specific hydrological conditions of a hydropower station, the solid–liquid two-phase flow in the whole flow passage of a Francis turbine with splitter blades in sandy water was numerically studied. A geometric model of the whole flow passage of the Francis turbine was established on the basis of given design parameters. The solid–liquid two-phase turbulent flows in Francis turbine runner under three different loads were numerically analyzed by using this model. The three different loads are as follows: Condition 1: single unit with 1/4 load, Condition 2: single unit with 1/2 load, and Condition 3: single unit with full load. The distributions of pressure and sand concentration on the leading side and the suction side of the runner blades, as well as the velocity vector distribution of water and sand on the horizontal section of the runner, were obtained under different load conditions. Therefore, the damages to various flow passage components by sand can be qualitatively predicated under various conditions. To guarantee the safety and stability of the unit, the adverse conditions shall be avoided, which can provide certain reference for plant operation.

  9. AMS radiocarbon dating of medieval textile relics: The frocks and the pillow of St. Francis of Assisi

    Fedi, M.E. [Dipartimento di Fisica dell' Universita di Firenze and INFN Sezione di Firenze, via Sansone 1, 50019 Sesto Fiorentino (Italy)], E-mail: fedi@fi.infn.it; Cartocci, A.; Taccetti, F.; Mando, P.A. [Dipartimento di Fisica dell' Universita di Firenze and INFN Sezione di Firenze, via Sansone 1, 50019 Sesto Fiorentino (Italy)

    2008-05-15

    Since natural textiles usually originate from short-lived organisms, they can represent a useful material to date samples from historical periods with a good accuracy. In this work, we present a set of radiocarbon measurements on medieval textile relics: two woollen habits and a pillow traditionally associated with St. Francis of Assisi, the saint patron of Italy. The strategy in choosing samples for radiocarbon dating is first discussed and the procedures for measurements - performed at the 3 MV Tandetron accelerator of Laboratorio di Tecniche Nucleari per i Beni Culturali (LABEC), Florence - are described; AMS results for the two frocks showed that only one of them, presently kept in the church of St. Francis in Cortona, is compatible with the Saint's period of life, as is the pillow also kept in Cortona. Another frock attributed to St. Francis appears to date from at least 80 years after his death. However, the goal of these measurements was not a bare authentication/disconfirmation of the relics; they just represent an example of how scientific analysis can integrate with humanistic studies. Indeed, AMS results, combined with a thorough analysis of the textiles typologies, confirmed the historical hypotheses based on documentary studies and on tradition. The overall conclusions contributed to the decisions taken for conservation, and have as a whole enhanced the religious importance of the relics.

  10. AMS radiocarbon dating of medieval textile relics: The frocks and the pillow of St. Francis of Assisi

    Fedi, M.E.; Cartocci, A.; Taccetti, F.; Mando, P.A.

    2008-01-01

    Since natural textiles usually originate from short-lived organisms, they can represent a useful material to date samples from historical periods with a good accuracy. In this work, we present a set of radiocarbon measurements on medieval textile relics: two woollen habits and a pillow traditionally associated with St. Francis of Assisi, the saint patron of Italy. The strategy in choosing samples for radiocarbon dating is first discussed and the procedures for measurements - performed at the 3 MV Tandetron accelerator of Laboratorio di Tecniche Nucleari per i Beni Culturali (LABEC), Florence - are described; AMS results for the two frocks showed that only one of them, presently kept in the church of St. Francis in Cortona, is compatible with the Saint's period of life, as is the pillow also kept in Cortona. Another frock attributed to St. Francis appears to date from at least 80 years after his death. However, the goal of these measurements was not a bare authentication/disconfirmation of the relics; they just represent an example of how scientific analysis can integrate with humanistic studies. Indeed, AMS results, combined with a thorough analysis of the textiles typologies, confirmed the historical hypotheses based on documentary studies and on tradition. The overall conclusions contributed to the decisions taken for conservation, and have as a whole enhanced the religious importance of the relics

  11. AMS radiocarbon dating of medieval textile relics: The frocks and the pillow of St. Francis of Assisi

    Fedi, M. E.; Cartocci, A.; Taccetti, F.; Mandò, P. A.

    2008-05-01

    Since natural textiles usually originate from short-lived organisms, they can represent a useful material to date samples from historical periods with a good accuracy. In this work, we present a set of radiocarbon measurements on medieval textile relics: two woollen habits and a pillow traditionally associated with St. Francis of Assisi, the saint patron of Italy. The strategy in choosing samples for radiocarbon dating is first discussed and the procedures for measurements - performed at the 3 MV Tandetron accelerator of Laboratorio di Tecniche Nucleari per i Beni Culturali (LABEC), Florence - are described; AMS results for the two frocks showed that only one of them, presently kept in the church of St. Francis in Cortona, is compatible with the Saint's period of life, as is the pillow also kept in Cortona. Another frock attributed to St. Francis appears to date from at least 80 years after his death. However, the goal of these measurements was not a bare authentication/disconfirmation of the relics; they just represent an example of how scientific analysis can integrate with humanistic studies. Indeed, AMS results, combined with a thorough analysis of the textiles typologies, confirmed the historical hypotheses based on documentary studies and on tradition. The overall conclusions contributed to the decisions taken for conservation, and have as a whole enhanced the religious importance of the relics.

  12. Expected load spectra of prototype Francis turbines in low-load operation using numerical simulations and site measurements

    Eichhorn, M.; Taruffi, A.; Bauer, C.

    2017-04-01

    The operators of hydropower plants are forced to extend the existing operating ranges of their hydraulic machines to remain competitive on the energy market due to the rising amount of wind and solar power. Faster response times and a higher flexibility towards part- and low-load conditions enable a better electric grid control and assure therefore an economic operation of the power plant. The occurring disadvantage is a higher dynamic excitation of affected machine components, especially Francis turbine runners, due to pressure pulsations induced by unsteady flow phenomena (e.g. draft tube vortex ropes). Therefore, fatigue analysis becomes more important even in the design phase of the hydraulic machines to evaluate the static and dynamic load in different operating conditions and to reduce maintenance costs. An approach including a one-way coupled fluid-structure interaction has been already developed using unsteady CFD simulations and transient FEM computations. This is now applied on two Francis turbines with different specific speeds and power ranges, to obtain the load spectra of both machines. The results are compared to strain gauge measurements on the according Francis turbines to validate the overall procedure.

  13. Francis Bacon and the "Interpretation of Nature" in the late Renaissance.

    Serjeantson, Richard

    2014-12-01

    The "interpretation of nature" (interpretatio naturae) is the leading idea in Francis Bacon's natural philosophy. But by contrast with his ideas about method, induction, or experiment, the significance of the "interpretation of nature" has received very little scholarly attention. This essay tests the originality of Bacon's idea by means of a focused survey of existing forms of Renaissance natural knowledge-Aristotelian and anti-Aristotelian natural philosophy, Galenic and Paracelsian medicine, natural magic, physiognomy, natural history-before turning to consider the much more prominent place of "interpretation" in the fields of Renaissance logic, revealed and natural theology, and law. It finds that Bacon's application of the idea of "interpretation" to nature was highly original, but also that certain important aspects of his conception have analogies in Renaissance civil law. The essay concludes by exploring the implications of these findings for a recent body of scholarship in the history of the sciences that invokes the notion of the "interpretation of nature" to characterize pre-Baconian natural philosophy more generally.

  14. The “Visual Shock” of Francis Bacon: an essay in neuroesthetics

    Zeki, Semir; Ishizu, Tomohiro

    2013-01-01

    In this paper we discuss the work of Francis Bacon in the context of his declared aim of giving a “visual shock.”We explore what this means in terms of brain activity and what insights into the brain's visual perceptive system his work gives. We do so especially with reference to the representation of faces and bodies in the human visual brain. We discuss the evidence that shows that both these categories of stimuli have a very privileged status in visual perception, compared to the perception of other stimuli, including man-made artifacts such as houses, chairs, and cars. We show that viewing stimuli that depart significantly from a normal representation of faces and bodies entails a significant difference in the pattern of brain activation. We argue that Bacon succeeded in delivering his “visual shock” because he subverted the normal neural representation of faces and bodies, without at the same time subverting the representation of man-made artifacts. PMID:24339812

  15. The mine and the furnace: Francis Bacon, Thomas Russell, and early Stuart mining culture.

    Pastorino, Cesare

    2009-01-01

    Notwithstanding Francis Bacon's praise for the philosophical role of the mechanical arts, historians have often downplayed Bacon's connections with actual artisans and entrepreneurs. Addressing the specific context of mining culture, this study proposes a rather different picture. The analysis of a famous mining metaphor in The Advancement of Learning shows us how Bacon's project of reform of knowledge could find an apt correspondence in civic and entrepreneurial values of his time. Also, Bacon had interesting and so far unexplored links with the early modern English mining enterprises, like the Company of Mineral and Battery Works, ofwhich he was a shareholder. Moreover, Bacon's notes in a private notebook, Commentarius Solutus, and records of patents of invention, allow us to start grasping Bacon's connections with the metallurgist and entrepreneur Thomas Russell. Lastly, this paper argues that, to fully understand Bacon's links with the world of Stuart technicians and entrepreneurs, it is necessary to consider a different and insufficiently studied aspect of Bacon's interests, namely his work as patents referee while a Commissioner of Suits.

  16. The role of high cycle fatigue (HCF) onset in Francis runner reliability

    Gagnon, M; Tahan, S A; Bocher, P; Thibault, D

    2012-01-01

    High Cycle Fatigue (HCF) plays an important role in Francis runner reliability. This paper presents a model in which reliability is defined as the probability of not exceeding a threshold above which HCF contributes to crack propagation. In the context of combined Low Cycle Fatigue (LCF) and HCF loading, the Kitagawa diagram is used as the limit state threshold for reliability. The reliability problem is solved using First-Order Reliability Methods (FORM). A study case is proposed using in situ measured strains and operational data. All the parameters of the reliability problem are based either on observed data or on typical design specifications. From the results obtained, we observed that the uncertainty around the defect size and the HCF stress range play an important role in reliability. At the same time, we observed that expected values for the LCF stress range and the number of LCF cycles have a significant influence on life assessment, but the uncertainty around these values could be neglected in the reliability assessment.

  17. When sleep-related hypermotor epilepsy (SHE) met Charles Darwin and Francis Galton.

    Parrino, Liborio; Pavesi, Giovanni

    2017-08-01

    Sleep-related hypermotor epilepsy (SHE) is characterized by short-lasting seizures patterned by repetitive and stereotyped motor events in the same person. In autosomal dominant SHE, genetic factors play a well-known key role. In The Expression of Emotions in Man and Animals, Charles Darwin quotes a plausible example of SHE illustrated by his cousin Sir Francis Galton: "the gentleman…lay fast asleep on his back in bed, raising his right arm slowly in front of his face, up to his forehead, and then dropping it with a jerk, so that the wrist fell heavily on the bridge of his nose. The trick did not occur every night, but occasionally, and was independent of any ascertained cause. Sometimes it was repeated incessantly for an hour or more." Similar manifestations during sleep occurred also in the patient's son and granddaughter, suggesting an autosomal inheritance without sex relationship. Differential diagnosis with REM behavior disorder and other parasomnias is discussed. To our knowledge, this could be the first description of a stereotyped SHE pattern with genetic transmission. © 2017 American Academy of Neurology.

  18. The 'root-brain' hypothesis of Charles and Francis Darwin: Revival after more than 125 years.

    Baluska, Frantisek; Mancuso, Stefano; Volkmann, Dieter; Barlow, Peter W

    2009-12-01

    This year celebrates the 200(th) aniversary of the birth of Charles Darwin, best known for his theory of evolution summarized in On the Origin of Species. Less well known is that, in the second half of his life, Darwin's major scientific focus turned towards plants. He wrote several books on plants, the next-to-last of which, The Power of Movement of Plants, published together with his son Francis, opened plants to a new view. Here we amplify the final sentence of this book in which the Darwins proposed that: "It is hardly an exaggeration to say that the tip of the radicle thus endowed [with sensitivity] and having the power of directing the movements of the adjoining parts, acts like the brain of one of the lower animals; the brain being seated within the anterior end of the body, receiving impressions from the sense-organs, and directing the several movements." This sentence conveys two important messages: first, that the root apex may be considered to be a 'brain-like' organ endowed with a sensitivity which controls its navigation through soil; second, that the root apex represents the anterior end of the plant body. In this article, we discuss both these statements.

  19. Numerical Simulation and Validation of a High Head Model Francis Turbine at Part Load Operating Condition

    Goyal, Rahul; Trivedi, Chirag; Kumar Gandhi, Bhupendra; Cervantes, Michel J.

    2017-07-01

    Hydraulic turbines are operated over an extended operating range to meet the real time electricity demand. Turbines operated at part load have flow parameters not matching the designed ones. This results in unstable flow conditions in the runner and draft tube developing low frequency and high amplitude pressure pulsations. The unsteady pressure pulsations affect the dynamic stability of the turbine and cause additional fatigue. The work presented in this paper discusses the flow field investigation of a high head model Francis turbine at part load: 50% of the rated load. Numerical simulation of the complete turbine has been performed. Unsteady pressure pulsations in the vaneless space, runner, and draft tube are investigated and validated with available experimental data. Detailed analysis of the rotor stator interaction and draft tube flow field are performed and discussed. The analysis shows the presence of a rotating vortex rope in the draft tube at the frequency of 0.3 times of the runner rotational frequency. The frequency of the vortex rope precession, which causes severe fluctuations and vibrations in the draft tube, is predicted within 3.9% of the experimental measured value. The vortex rope results pressure pulsations propagating in the system whose frequency is also perceive in the runner and upstream the runner.

  20. Numerical investigation of the air injection effect on the cavitating flow in Francis hydro turbine

    Chirkov, D. V.; Shcherbakov, P. K.; Cherny, S. G.; Skorospelov, V. A.; Turuk, P. A.

    2017-09-01

    At full and over load operating points, some Francis turbines experience strong self-excited pressure and power oscillations. These oscillations are occuring due to the hydrodynamic instability of the cavitating fluid flow. In many cases, the amplitude of such pulsations may be reduced substantially during the turbine operation by the air injection/ admission below the runner. Such an effect is investigated numerically in the present work. To this end, the hybrid one-three-dimensional model of the flow of the mixture "liquid-vapor" in the duct of a hydroelectric power station, which was proposed previously by the present authors, is augmented by the second gaseous component — the noncondensable air. The boundary conditions and the numerical method for solving the equations of the model are described. To check the accuracy of computing the interface "liquid-gas", the numerical method was applied at first for solving the dam break problem. The algorithm was then used for modeling the flow in a hydraulic turbine with air injection below the runner. It is shown that with increasing flow rate of the injected air, the amplitude of pressure pulsations decreases. The mechanism of the flow structure alteration in the draft tube cone has been elucidated, which leads to flow stabilization at air injection.

  1. Experimental Investigation of Inter-Blade Vortices in a Model Francis Turbine

    LIU, Demin; LIU, Xiaobing; ZHAO, Yongzhi

    2017-07-01

    The inter-blade vortex in a Francis turbine becomes one of the main hydraulic factors that are likely to cause blade erosion at deep part load operating conditions. However, the causes and the mechanism of inter-blade vortex are still under investigation according to present researches. Thus the causes of inter-blade vortex and the effect of different hydraulic parameters on the inter-blade vortex are investigated experimentally. The whole life cycle of the inter-blade vortex is observed by a high speed camera. The test results illustrate the whole life cycle of the inter-blade vortex from generation to separation and even to fading. It is observed that the inter-blade vortex becomes stronger with the decreasing of flow and head, which leads to pressure fluctuation. Meanwhile, the pressure fluctuations in the vane-less area and the draft tube section become stronger when inter-blade vortices exist in the blade channel. The turbine will be damaged if operating in the inter-blade vortex zone, so its operating range must be far away from that zone. This paper reveals the main cause of the inter-blade vortex which is the larger incidence angle between the inflow angle and the blade angle on the leading edge of the runner at deep part load operating conditions.

  2. Experiences with the hydraulic design of the high specific speed Francis turbine

    Obrovsky, J; Zouhar, J

    2014-01-01

    The high specific speed Francis turbine is still suitable alternative for refurbishment of older hydro power plants with lower heads and worse cavitation conditions. In the paper the design process of such kind of turbine together with the results comparison of homological model tests performed in hydraulic laboratory of ČKD Blansko Engineering is introduced. The turbine runner was designed using the optimization algorithm and considering the high specific speed hydraulic profile. It means that hydraulic profiles of the spiral case, the distributor and the draft tube were used from a Kaplan turbine. The optimization was done as the automatic cycle and was based on a simplex optimization method as well as on a genetic algorithm. The number of blades is shown as the parameter which changes the resulting specific speed of the turbine between n s =425 to 455 together with the cavitation characteristics. Minimizing of cavitation on the blade surface as well as on the inlet edge of the runner blade was taken into account during the design process. The results of CFD analyses as well as the model tests are mentioned in the paper

  3. Experiences with the hydraulic design of the high specific speed Francis turbine

    Obrovsky, J.; Zouhar, J.

    2014-03-01

    The high specific speed Francis turbine is still suitable alternative for refurbishment of older hydro power plants with lower heads and worse cavitation conditions. In the paper the design process of such kind of turbine together with the results comparison of homological model tests performed in hydraulic laboratory of ČKD Blansko Engineering is introduced. The turbine runner was designed using the optimization algorithm and considering the high specific speed hydraulic profile. It means that hydraulic profiles of the spiral case, the distributor and the draft tube were used from a Kaplan turbine. The optimization was done as the automatic cycle and was based on a simplex optimization method as well as on a genetic algorithm. The number of blades is shown as the parameter which changes the resulting specific speed of the turbine between ns=425 to 455 together with the cavitation characteristics. Minimizing of cavitation on the blade surface as well as on the inlet edge of the runner blade was taken into account during the design process. The results of CFD analyses as well as the model tests are mentioned in the paper.

  4. The Catholic Bishops in the U.S. Public Arena: Changing Prospects under Pope Francis

    Richard L. Wood

    2016-02-01

    Full Text Available The public profile of the Roman Catholic bishops of the United States results not simply from their own interventions in political life, but from the broad array of actions and actors within “public Catholicism” broadly conceived. This article assesses the contemporary profile of the American bishops from this broad angle, particularly in light of new dynamics under the papacy of Francis I. It does so by documenting public Catholicism’s presence in ecclesial institutions, other public institutions, and lay-centered social movements (particularly faith-based community organizing and via a case study of the healthcare reform debate around the State Children’s Health Insurance Program and the Affordable Care Act. Cultural and institutional factors shaping Catholic public presence are analyzed in three dimensions of social life: institutional leadership; authority dynamics within the Church; and the culture of prayer, spirituality, and worship in parishes. Finally, the conclusion discusses the key dynamics likely to shape the future of public Catholicism in America.

  5. Simulation of the Francis-99 Hydro Turbine During Steady and Transient Operation

    Dewan, Yuvraj; Custer, Chad; Ivashchenko, Artem

    2017-01-01

    Numerical simulation of the Francis-99 hydroturbine with correlation to experimental measurements are presented. Steady operation of the hydroturbine is analyzed at three operating conditions: the best efficiency point (BEP), high load (HL), and part load (PL). It is shown that global quantities such as net head, discharge and efficiency are well predicted. Additionally, time-averaged velocity predictions compare well with PIV measurements obtained in the draft tube immediately downstream of the runner. Differences in vortex rope structure between operating points are discussed. Unsteady operation of the hydroturbine from BEP to HL and from BEP to PL are modeled. It is shown that simulation methods used to model the steady operation produce predictions that correlate well with experiment for transient operation. Time-domain unsteady simulation is used for both steady and unsteady operation. The full-fidelity geometry including all components is meshed using an unstructured polyhedral mesh with body-fitted prism layers. Guide vane rotation for transient operation is imposed using fully-conservative, computationally efficient mesh morphing. The commercial solver STAR-CCM+ is used for all portions of the analysis including meshing, solving and post-processing.

  6. Applying Turbulence Models to Hydroturbine Flows: A Sensitivity Analysis Using the GAMM Francis Turbine

    Lewis, Bryan; Cimbala, John; Wouden, Alex

    2011-11-01

    Turbulence models are generally developed to study common academic geometries, such as flat plates and channels. Creating quality computational grids for such geometries is trivial, and allows stringent requirements to be met for boundary layer grid refinement. However, engineering applications, such as flow through hydroturbines, require the analysis of complex, highly curved geometries. To produce body-fitted grids for such geometries, the mesh quality requirements must be relaxed. Relaxing these requirements, along with the complexity of rotating flows, forces turbulence models to be employed beyond their developed scope. This study explores the solution sensitivity to boundary layer grid quality for various turbulence models and boundary conditions currently implemented in OpenFOAM. The following models are resented: k-omega, k-omega SST, k-epsilon, realizable k-epsilon, and RNG k-epsilon. Standard wall functions, adaptive wall functions, and sub-grid integration are compared using various grid refinements. The chosen geometry is the GAMM Francis Turbine because experimental data and comparison computational results are available for this turbine. This research was supported by a grant from the DoE and a National Defense Science and Engineering Graduate Fellowship.

  7. A Parametric Study of Unsteady Rotor-Stator Interaction in a Simplified Francis Turbine

    Wouden, Alex; Cimbala, John; Lewis, Bryan

    2011-11-01

    CFD analysis is becoming a critical stage in the design of hydroturbines. However, its capability to represent unsteady flow interactions between the rotor and stator (which requires a 360-degree, mesh-refined model of the turbine passage) is hindered. For CFD to become a more effective tool in predicting the performance of a hydroturbine, the key interactions between the rotor and stator need to be understood using current numerical methods. As a first step towards evaluating this unsteady behavior without the burden of a computationally expensive domain, the stator and Francis-type rotor blades are reduced to flat plates. Local and global variables are compared using periodic, semi-periodic, and 360-degree geometric models and various turbulence models (k-omega, k-epsilon, and Spalart-Allmaras). The computations take place within the OpenFOAM® environment and utilize a general grid interface (GGI) between the rotor and stator computational domains. The rotor computational domain is capable of dynamic rotation. The results demonstrate some of the strengths and limitations of utilizing CFD for hydroturbine analysis. These case studies will also serve as tutorials to help others learn how to use CFD for turbomachinery. This research is funded by a grant from the DOE.

  8. Experimental Investigation on the Characteristics of Hydrodynamic Stabilities in Francis Hydroturbine Models

    Wen-Tao Su

    2014-03-01

    Full Text Available This paper presents an experimental investigation of flow phenomena related to the characteristic frequencies of pressure fluctuation in Francis hydroturbine models. The experiments were carried out on two test rigs with two model runners having hydraulic similarities. Flow field around the guide vanes was measured with a particle image velocimetry (PIV on the first PIV test rig. Flow structures at the inlet region of runner and in draft tube at different operating conditions were visualized on another hydrodynamic test rig. Analyses of dominant frequency of unsteady hydraulic behaviors in the tested hydroturbines were performed. It was observed that the main frequency of flow over the guide vanes and the dominant frequency of channel vortex equal the blade passing frequency; the dominant frequency of flow separation at the suction side of blade inlet equals the vane passing frequency; the vortex rope in the draft tube displays a low-frequency nature. The flow instabilities and fluctuations directly influence the running of hydroturbine, thus these experimental results could provide important evidence for the stability study of a real hydroturbine.

  9. Laboratory modeling of flow regimes in a draft tube of Francis hydro-turbine

    Shtork Sergey

    2017-01-01

    Full Text Available The paper reports on some results of the experimental study of flow and pressure pulsations in a laboratory model of the draft tube (DT of Francis-99 hydro-turbine over a broad range of operating regimes. Velocity distributions at the model inlet varied within 866 modes of the turbine load conditions, including those with maximum coherent pressure pulsations on the model walls. The contact and non-contact methods were used to measure pressure pulsations on the model walls using acoustic sensors and to measure the averaged velocity distribution with a laser Doppler anemometer “LAD-06i”. Analysis of the results have showed that in the model cone there are flow modes with forming of precessing vortex cores, accompanied by a sharp increase in the amplitude of coherent pressure pulsations on the wall and the velocity field rearrangement. It is shown that the vortex core starts forming with an increase in the integral parameter of swirl up to S>0.5. A novelty of the work is the combination of the rapid prototyping (3-d printing of the inflow swirl generators and computerized measurement techniques that makes it possible to acquire rapidly a large amount of experimental data for a variety of designs and operating conditions. The results can provide insight into the effect of various design and operating parameters on the flow physics, as well as serve for verification of the numerical simulations.

  10. Deciphering the language of nature: cryptography, secrecy, and alterity in Francis Bacon.

    Clody, Michael C

    2011-01-01

    The essay argues that Francis Bacon's considerations of parables and cryptography reflect larger interpretative concerns of his natural philosophic project. Bacon describes nature as having a language distinct from those of God and man, and, in so doing, establishes a central problem of his natural philosophy—namely, how can the language of nature be accessed through scientific representation? Ultimately, Bacon's solution relies on a theory of differential and duplicitous signs that conceal within them the hidden voice of nature, which is best recognized in the natural forms of efficient causality. The "alphabet of nature"—those tables of natural occurrences—consequently plays a central role in his program, as it renders nature's language susceptible to a process and decryption that mirrors the model of the bilateral cipher. It is argued that while the writing of Bacon's natural philosophy strives for literality, its investigative process preserves a space for alterity within scientific representation, that is made accessible to those with the interpretative key.

  11. From medicine to natural philosophy: Francis Hauksbee's way to the air-pump.

    Brundtland, Terje

    2008-06-01

    Francis Hauksbee (1660-1713) is well known for his double-barrelled air-pump. However, the origin of this pump, and Hauksbee's background, are often described as a mystery. This text seeks to dispel the riddle. It is argued that Hauksbee's competence as an exceptional maker of air-pumps was developed between 1699 and 1703 as a result of his experiences with the construction, manufacturing and sale of cupping-glasses. His cupping utensils embodied a new design, where syringes were used to evacuate the glasses, instead of the traditional way by fire or mouth suction. These syringes, which in fact were small air-pumps, were perfected between 1699 and 1701. A larger syringe, introduced in 1701, served as a transition from the cupping-syringe to his first air-pump for use in natural philosophy. This syringe was described as a 'combined engine', which could serve as an air-pump, a condensing engine and a syringe for injecting air, wax or mercury into pathological specimens. Hauksbee's first air-pump was a single-barrelled model introduced in 1702, based on the combined engine. Its various features, such as easy and convenient leak-tightening, exact pressure measurements by an in-built barometer and an air-inlet function for readmission of air into the receiver, are discussed. Finally, it is shown that these activities gave Hauksbee the reputation of being an outstanding instrument-maker, years before the double-barrelled air-pump was in sight.

  12. Experimental Hydro-Mechanical Characterization of Full Load Pressure Surge in Francis Turbines

    Müller, A.; Favrel, A.; Landry, C.; Yamamoto, K.; Avellan, F.

    2017-04-01

    Full load pressure surge limits the operating range of hydro-electric generating units by causing significant power output swings and by compromising the safety of the plant. It appears during the off-design operation of hydraulic machines, which is increasingly required to regulate the broad integration of volatile renewable energy sources into the existing power network. The underlying causes and governing physical mechanisms of this instability were investigated in the frame of a large European research project and this paper documents the main findings from two experimental campaigns on a reduced scale model of a Francis turbine. The multi-phase flow in the draft tube is characterized by Particle Image Velocimetry, Laser Doppler Velocimetry and high-speed visualizations, along with synchronized measurements of the relevant hydro-mechanical quantities. The final result is a comprehensive overview of how the unsteady draft tube flow and the mechanical torque on the runner shaft behave during one mean period of the pressure oscillation, thus defining the unstable fluid-structure interaction responsible for the power swings. A discussion of the root cause is initiated, based on the state of the art. Finally, the latest results will enable a validation of recent RANS flow simulations used for determining the key parameters of hydro-acoustic stability models.

  13. Investigation of a High Head Francis Turbine at Runaway Operating Conditions

    Chirag Trivedi

    2016-03-01

    Full Text Available Hydraulic turbines exhibit total load rejection during operation because of high fluctuations in the grid parameters. The generator reaches no-load instantly. Consequently, the turbine runner accelerates to high speed, runaway speed, in seconds. Under common conditions, stable runaway is only reached if after a load rejection, the control and protection mechanisms both fail and the guide vanes cannot be closed. The runner life is affected by the high amplitude pressure loading at the runaway speed. A model Francis turbine was used to investigate the consequences at the runaway condition. Measurements and simulations were performed at three operating points. The numerical simulations were performed using standard k-ε, k-ω shear stress transport (SST and scale-adaptive simulation (SAS models. A total of 12.8 million hexahedral mesh elements were created in the complete turbine, from the spiral casing inlet to the draft tube outlet. The experimental and numerical analysis showed that the runner was subjected to an unsteady pressure loading up to three-times the pressure loading observed at the best efficiency point. Investigates of unsteady pressure pulsations at the vaneless space, runner and draft tube are discussed in the paper. Further, unsteady swirling flow in the blade passages was observed that was rotating at a frequency of 4.8-times the runaway runner angular speed. Apart from the unsteady pressure loading, the development pattern of the swirling flow in the runner is discussed in the paper.

  14. Water hammer effect in the spiral case and penstock of Francis turbines

    Pepa, D.; Ursoniu, C.; Gillich, R. N.; Campian, C. V.

    2017-01-01

    Sudden pressure increases in the penstock or spiral case of a hydraulic turbine are the effect of sudden flow variation that occur during transient processes of type opening / closing or load rejection of the hydro unit. The consequence of the pressure rise in the spiral case and penstock is the water hammer phenomenon, whose effects can be devastating in some cases, up to breaking pipes and calamities produced in the area. This paper aims to analyze the method of calculation of the maximum pressure values that might occur in load rejection situations to a hydraulic turbine, in spiral case and in penstock, conditioned by the limiting of the values of the over speed and measures of limiting the increase in pressure in conjunction with limiting the increase in speed in these specific processes. As an example, we studied and analyzed the situation of a hydroelectric power plant equipped with a 7.8 MW Francis turbine without pressure regulator and the inflow surge. The results of analytical calculation overlaid on the experimental measurements performed during the performance tests of the hydro unit lead to the conclusion that the calculation algorithm proposed has been chosen correctly and the 2-stage closing law of the wicket gate promoted in this case is effective in such situations.

  15. Predicting the performance of a high head Francis turbine using a fully implicit mixing plane

    Amstutz, O; Aakti, B; Casartelli, E; Mangani, L; Hanimann, L

    2015-01-01

    In the present paper numerical investigations of a complete high head Francis turbine comprehensive of a spiral casing, stay and guide vanes and draft tube have been performed at three operating conditions, namely at part load (PL), best efficiency point (BEP), and high load (HL). The main target of the investigations is to assess the prediction accuracy of a reduced domain of the complete turbine using a novel mixing-plane formulation. The computational domain is simplified simulating one single passage of the runner, thus assuming rotational periodicity and steady state conditions. The results were compared with experimental data published by the workshop organization. All CFD simulations were performed at model scale with an in-house adapted, 3D, unstructured, object-oriented finite volume code based on the OpenFOAM-V2.2 framework and designed to solve steady-state incompressible RANS-Equations. The pressure-based solver uses a SIMPLE-C like algorithm and is capable of handling multiple references of frame (MRF). The influence of the turbulence has been considered applying the shear-stress transport model (SST). Full second order upwind scheme for advection discretization has been used for all computations

  16. Epidemiologia do câncer de boca em laboratório público do Estado de Mato Grosso, Brasil Oral cancer epidemiology in a public laboratory in Mato Grosso State, Brazil

    Fabiano Tonaco Borges

    2008-09-01

    Full Text Available O objetivo deste trabalho foi analisar a epidemiologia do câncer de boca, dos casos diagnosticados pelo laboratório público do Estado de Mato Grosso, Brasil, após a instituição da política de atenção às doenças da boca e da face do estado. Trata-se de um estudo epidemiológico transversal. O objeto estudado foi o laudo histopatológico, pesquisando-se um total de 1.324 laudos emitidos entre janeiro de 2005 e dezembro 2006. Verificaram-se os casos de câncer de boca, o seu percentual em relação ao universo das lesões bucais e as seguintes variáveis: tipo histológico, sexo, idade e procedência dos pacientes (capital ou do interior. Após a análise dos dados verificaram-se 44 lesões de câncer de boca, representando 3% dos diagnósticos. O tipo histológico mais incidente foi o carcinoma epidermóide. A maioria dos diagnósticos foi referente aos homens na 5ª e 6ª décadas de vida residentes no interior do estado. Conclui-se com este estudo que em dois anos de funcionamento o serviço público de patologia bucal registrou um considerável número de casos de câncer de boca.This study analyzed oral cancer epidemiology based on histopathology reports from a public laboratory in Mato Grosso, Brazil, after a specific policy was implemented for treating oral and facial diseases in the State. This was a cross-sectional epidemiological study, based on 1,324 histopathology reports issued from January 2005 to December 2006. The study identified 44 cases of oral cancer, or 3% of all oral lesions, and analyzed them in relation to the following variables: histological type, gender, age, and patient's place of residence (capital versus rest of State. The most common histological type was squamous cell carcinoma. Most of the diagnoses occurred in men in their 50s and 60s living in the interior of the State. During two years in operation, this public oral pathology service had recorded a considerable number of oral cancer cases.

  17. As Redes Sociais e o Comportamento de Compra do Consumidor: o reinado do “boca-a-boca” está de volta?

    Robson Nogueira Tomas

    2012-09-01

    Full Text Available Cada vez mais, a internet tem sido considerada um canal de marketing que abre espaço para comunicação personalizada e diferenciada entre empresas e consumidores (Kloter & Keller, 2006. Nessa direção, nota-se que em um mercado de concorrência em constante ascensão e aumento de complexidade, tem sido constante, também, a preocupação de algumas empresas no que diz respeito às novas ferramentas da internet que impactam o comportamento de compra do consumidor. Entretanto, ainda são escassos estudos acerca desta temática. Sob esta perspectiva, objetivou-se neste artigo conhecer e entender como as novas ferramentas da internet, em especial a web 2.0, influenciam o comportamento de compra do consumidor. Para tanto, realizou-se uma pesquisa exploratória de abordagem quantitativa, utilizando-se de entrevistas estruturadas, e, com amparo do software SPSS para tratamento dos dados. Parte dos resultados indica que a sofisticação do consumidor é uma tendência, sendo que a mesma é mais forte em determinados grupos de consumidores e categorias de produtos. Também há indícios de que o conhecido “boca-a-boca” mudou e está mais sofisticado com a ascensão das redes sociais. DOI: 10.5585/remark.v11i2.2325

  18. Alimentación, salud y pobreza en áreas marginadas urbanas: caso Veracruz-Boca del Río, Veracruz, México

    Ana Lid Del Ángel-Pérez

    2014-01-01

    Full Text Available Se caracterizó la alimentación en 120 hoga - res en áreas marginadas en Veracruz-Boca del Río, México, mediante el Indice de Di - versidad Dietética y su asociación con varia - bles socioeconómicas. Los hogares se clasifi - caron en cuatro niveles socioeconómicos, 99% se ubicó en situación de pobreza. De 52% a 71% del ingreso familiar se gasta en alimentos. En la dieta prevalecen alimentos con alto contenido calórico, proteína animal de baja calidad y bajo consumo de frutas y verduras. La diversidad dietética en todos los niveles socioeconómicos no superó el 50% de los alimentos básicos requeridos para una buena nutrición. El 56% de los hogares tiene a alguien que padece algún tipo de enferme - dad crónica no transmisible, así como algún miembro de la parentela extensa (80% con recomendaciones médicas de cambiar su ali - mentación y hacer ejercicio físico.

  19. Primary diffuse large B-cell lymphoma of the oral cavity Linfoma difuso de grandes células B primário de boca

    Bruno Correia Jham

    2007-10-01

    Full Text Available Lymphomas arising within the oral cavity account for only 3.5% of all oral malignancies. Diffuse large B-cell lymphoma is a non-Hodgkin lymphoma subtype characterized by diffuse proliferation of large neoplastic B lymphoid cells. This paper reports a case of diffuse large B-cell lymphoma affecting the oral cavity of a Brazilian woman, along with its clinical, microscopical, immunohistochemical, and molecular features.Linfomas correspondem a 3,5% de todos os casos de lesões malignas de boca. O linfoma difuso de grandes células B é um subtipo de linfoma não-Hodgkin caracterizado pela proliferação difusa de células linfóides B. Este artigo relata um caso de linfoma difuso de grandes células B localizado na cavidade bucal de uma mulher brasileira, incluindo os achados clínicos, microscópicos, imuno-histoquímicos e moleculares.

  20. PARTICIPACIÓN COMUNITARIA EN EL GOLFO DE URABÁ: EL CASO DEL CORREGIMIENTO BOCAS DEL ATRATO Y LA VEREDA EL ROTO, MUNICIPIO DE TURBO, ANTIOQUIA

    TABORDA MARÍN ALEXANDER

    2010-05-01

    Full Text Available El texto expone, desde el estudio de los aspectos socioculturales y el abordaje particular de la participación comunitaria, los resultados de un proyecto experimental de acuicultura de róbalo (Centropomus undecimalis y sábalo (Megalops atlanticus en el Corregimiento de Bocas del Atrato y la vereda El Roto, del Municipio de Turbo, Antioquia. Trabajo interdisciplinario que busca generar herramientas de conocimiento científico para contribuir en la mitigación de la disminución del recurso íctico en el que se basa el sustento de estas poblaciones mediante una metodología de Investigación Acción Participativa. Se analizan algunos aspectos culturales y socioeconómicos de estas comunidades que influyeron en el desarrollo del proyecto, junto con reflexiones sobre las experiencias vividas, a manera de recomendaciones para futuros trabajos de este tipo y como un llamado a la revisión autocrítica de lo que es la práctica de la interdisciplinariedad en proyectos de intervención en el marco del desarrollo sostenible. La investigación se desarrolló entre enero de 2007 y junio de 2008.

  1. Assessment of pollution of the Boca de Camichin Estuary in Nayarit (Mexico) and its influence on oxidative stress in Crassostrea corteziensis oysters.

    Toledo-Ibarra, G A; Díaz Resendiz, K J G; Ventura-Ramón, G H; Romero-Bañuelos, C A; Medina-Díaz, I M; Rojas-García, A E; Vega-López, A; Girón-Pérez, M I

    2016-10-01

    Boca de Camichin Estuary is one of the main producers of Crassostrea corteziensis oysters in Mexico, but the presence of pollutants can affect oyster production. Molluscs produce reactive oxygen species (ROS) in response to changes in the environment and pollution. These ROS induce oxidative damage in biomolecules. The main objective of this study was to evaluate pollution in the estuary and the subsequent oxidative stress in C. corteziensis oysters during the 2010 production cycle. For this aim, we performed monthly samplings in the oyster farms from January to May. We took water samples to quantify polycyclic aromatic hydrocarbon (PAH) and metal content; also, we evaluated oxidative damage (lipoperoxidation, lipidic hydroperoxides, protein oxidation) and enzyme activity (CAT, SOD, GPx, GST and AChE) in oyster gills. The results show the presence of Cu, Fe, Mn, naphthalene, benz[a]anthracene, pyrene, benz[a]pyrene and benzo[k]fluoranthene. On the other hand, AChE activity was not inhibited, which suggests that organophosphorus pollutants or carbamates were absent. Regarding oxidative stress, oysters from the estuary had oxidative damage in lipids, not proteins, and altered antioxidant enzyme activity, when compared to control organisms. Interestingly, we did not observe any correlation between the pollutants and the oxidative stress parameters evaluated in this study. Thus, we cannot rule out that a synergistic effect between the environmental variables and the pollutants is causing the oxidative stress in these oysters. Copyright © 2016 Elsevier Inc. All rights reserved.

  2. Fantasmagorias e fantasmas em dois romances de Rui Mourão: Boca de Chafariz e Os demônios descem o morro.

    Ruth Silviano Brandão

    2016-05-01

    Full Text Available Este artigo analisa dois romances de Rui Mourão, Boca de chafariz e Os demônios descem o morro, com uma base teórica de Walter Benjamin, através de seus conceitos sobre a história, a melancolia, o barroco mineiro, a fantasmagoria. Além de Benjamin, recorremos a algumas ideias pontuais de Luciano de Samósata sobre como escrever história, principalmente sua relação com a verdade e a ficção. Os conceitos dos dois autores teóricos, Benjamin e Luciano, tangenciam-se em alguns pontos e, segundo nosso ponto de vista, favorecem um diálogo, tanto no plano ficcional, como com o histórico, através de figuras de outros séculos, presentes como fantasmas, que também dialogam com nosso presente, tornando os romances polissêmicos, pelo jogo de vozes. O método de leitura é comparativo, já que se articulam valores de duas culturas, vários autores, apresentando revisões da história, sob o olhar contemporâneo.

  3. EL PAPEL DE LA REPUTACIÓN, EL BOCA-OREJA, LA CONFIANZA Y LA INCERTIDUMBRE EN LA CONTRATACIÓN DE UN BANCO

    de Obesso Grijalvo, Ana María

    2012-09-01

    Full Text Available ¿Qué factores influyen en los consumidores cuando tiene que elegir un banco con el que contratar en situaciones de información asimétrica? Es una situación en que la empresa normalmente posee más información que los consumidores, lo que les genera incertidumbre ante un posible comportamiento empresarial oportunista. Para reducirla, el consumidor puede recurrir, por un lado, a señales que envía el propio banco al mercado, como su reputación, y por otro lado, a la búsqueda de información más informal, la comunicación boca-oreja (WOM positiva de conocidos para generar o aumentar su confianza y, a través de esta, desarrollar una intención de contratar con un banco y no con otros. Las relaciones entre esas variables se testaron con una muestra de 155 usuarios de banca cuando aún no habían trabajado con un determinado banco. Los resultados indican la importancia de la reputación del banco y la información positiva recibida de prescriptores para generar confianza, pero con diferencias en función del grado de incertidumbre ex ante percibida, que modera esas relaciones.

  4. Computation and analysis of cavitating flow in Francis-class hydraulic turbines

    Leonard, Daniel J.

    Hydropower is the most proven renewable energy technology, supplying the world with 16% of its electricity. Conventional hydropower generates a vast majority of that percentage. Although a mature technology, hydroelectric generation shows great promise for expansion through new dams and plants in developing hydro countries. Moreover, in developed hydro countries, such as the United States, installing generating units in existing dams and the modern refurbishment of existing plants can greatly expand generating capabilities with little to no further impact on the environment. In addition, modern computational technology and fluid dynamics expertise has led to substantial improvements in modern turbine design and performance. Cavitation has always presented a problem in hydroturbines, causing performance breakdown, erosion, damage, vibration, and noise. While modern turbines are usually designed to be cavitation-free at their best efficiency point, due to the variable demand of the energy market it is fairly common to operate at off-design conditions. Here, cavitation and its deleterious effects are unavoidable, and hence, cavitation is a limiting factor on the design and operation of these turbines. Multiphase Computational Fluid Dynamics (CFD) has been used in recent years to model cavitating flow for a large range of problems, including turbomachinery. However, CFD of cavitating flow in hydroturbines is still in its infancy. This dissertation presents steady-periodic Reynolds-averaged Navier-Stokes simulations of a cavitating Francis-class hydroturbine at model and prototype scales. Computational results of the reduced-scale model and full-scale prototype, undergoing performance breakdown, are compared with empirical model data and prototype performance estimations based on standard industry scalings from the model data. Mesh convergence of the simulations is also displayed. Comparisons are made between the scales to display that cavitation performance breakdown

  5. Numerical Simulation of the Francis Turbine and CAD used to Optimized the Runner Design (2nd).

    Sutikno, Priyono

    2010-06-01

    , medium head Francis type, with following value for the most important parameter, the rated specific speed ns.

  6. Sobre as afinidades entre a filosofia de Francis Bacon e o ceticismo

    Luiz A. A. Eva

    2006-06-01

    Full Text Available Este texto se ocupa de um exame, em caráter introdutório, das relações entre a reflexão de Bacon acerca das limitações de nossas faculdades e o ceticismo filosófico - um tema pouco considerado pela literatura mais recente, a despeito das muitas referências a tal filosofia. Ainda que, à primeira vista, tais referências possam parecer vagas e imprecisas, pensamos que um exame adequado de algumas delas pode revelar, não apenas a importância do tema para a compreensão de aspectos do seu próprio empreendimento, mas o interesse de Bacon pela literatura cética contemporânea. As peculiaridades de sua própria interpretação, por sua vez, parecem antecipar traços do modo como essa filosofia foi compreendida por filósofos posteriores, como Hume.This text focuses, in a preliminary way, on the relations between Francis Bacon's reflections on the limits of our cognitive faculties and philosophical skepticism, a theme not much considered by most of recent commentaries, in spite of Bacon's own explicit and numerous allusions to this philosophy. Even if these allusions seem at first sight somewhat loose and not very sharp, some of them reveal, we think, not only its relevance for understanding of some aspects of his own enterprise, but also Bacon's attention to the skeptical literature produced on the period. Moreover, the particularities of his own interpretation of skepticism seem to anticipate important features of the way this philosophy was understood by later philosophers as Hume.

  7. Two-phase simulations of the full load surge in Francis turbines

    Wack, J.; Riedelbauch, S.

    2016-11-01

    At off-design conditions, Francis turbines experience cavitation which may reduce the power output and can cause severe damage in the machine. Certain conditions can cause self-excited oscillations of the vortex rope in the draft tube at full load operating point. For the presented work, two-phase simulations are carried out at model scale on a domain ranging from the inlet of the spiral case to the outlet of the draft tube. At different locations, wall pressure measurements are available and compared to the simulation results. Furthermore, the dynamics of the cavity volume in the draft tube cone and at the trailing edge of the runner blades are investigated by comparing with high speed visualization. To account for the selfexcited behaviour, proper boundary conditions need to be set. In this work, the focus lies on the treatment of the boundary condition at the inlet. In the first step, the dynamic behaviour of the cavity regions is investigated using a constant mass flow. Thereafter, oscillations of the total pressure and mass flow rate are prescribed using various frequencies and amplitudes. This methodology enables to examine the response of the cavity dynamics due to different excitations. It can be observed that setting a constant mass flow boundary condition is not suitable to account for the self-excited behaviour. Prescribing the total pressure has the result that the frequency of the vapour volume oscillation is the same as the frequency of the excitation signal. Contrary to that, for an excitation with a mass flow boundary condition, the response of the system is not equal to the excitation.

  8. Francis Crick, cross-worlds influencer: A narrative model to historicize big bioscience.

    Aicardi, Christine

    2016-02-01

    The essay is an empirical case study of famed British scientist Francis Crick. Viewing him as a 'cross-worlds influencer' who was moreover dedicated to a cause, I have tried to understand how these two characteristics influenced the trajectory of his long career and how they shaped his contributions to the diverse research fields in which he was active, and concluded that these characteristics reconfigure Crick's career into a coherent whole. First, I identify a major thread running through Crick's career: helping organise 'un-disciplined' new research fields, and show that his successive choices were not serendipitous but motivated by what he construed as a crusade against 'vitalism': anti-vitalism was a defining driver of his career. I then examine how Crick put his skills as a crossworlds influencer to the service of his cause, by helping organise his chosen fields of intervention. I argue that his activities as a cross-worlds influencer were an integral part of his way of 'doing science' and that his contributions to science, neuroscience in particular, should be re-evaluated in this light. This leads me to advance a possible strategy for historians to investigate big bioscience fields. Following Abir-Am, I propose to trace their genealogies back to the fluctuating semi-institutional gatherings and the institutional structures that sustained them. My research on Crick supports the view that such studies can bring insights into the question of why the contours of contemporary big bioscience endeavours have come to be shaped the way they are. Further, the essay provides a heuristic device for approaching these enquiries: 'follow the cross-worlds influencers' who worked to build and organise these semi-institutional gatherings and institutional structures. Copyright © 2015 The Author. Published by Elsevier Ltd.. All rights reserved.

  9. Francis Crick, cross-worlds influencer: A narrative model to historicize big bioscience

    Aicardi, Christine

    2016-01-01

    The essay is an empirical case study of famed British scientist Francis Crick. Viewing him as a ‘cross-worlds influencer’ who was moreover dedicated to a cause, I have tried to understand how these two characteristics influenced the trajectory of his long career and how they shaped his contributions to the diverse research fields in which he was active, and concluded that these characteristics reconfigure Crick's career into a coherent whole. First, I identify a major thread running through Crick's career: helping organise ‘un-disciplined’ new research fields, and show that his successive choices were not serendipitous but motivated by what he construed as a crusade against ‘vitalism’: anti-vitalism was a defining driver of his career. I then examine how Crick put his skills as a crossworlds influencer to the service of his cause, by helping organise his chosen fields of intervention. I argue that his activities as a cross-worlds influencer were an integral part of his way of ‘doing science’ and that his contributions to science, neuroscience in particular, should be re-evaluated in this light. This leads me to advance a possible strategy for historians to investigate big bioscience fields. Following Abir-Am, I propose to trace their genealogies back to the fluctuating semi-institutional gatherings and the institutional structures that sustained them. My research on Crick supports the view that such studies can bring insights into the question of why the contours of contemporary big bioscience endeavours have come to be shaped the way they are. Further, the essay provides a heuristic device for approaching these enquiries: ‘follow the cross-worlds influencers’ who worked to build and organise these semi-institutional gatherings and institutional structures. PMID:26383132

  10. The Origin of DIRT (Detrital Input and Removal Treatments): the Legacy of Dr. Francis D. Hole

    Townsend, K. L.; Lajtha, K.; Caldwell, B.; Sollins, P.

    2007-12-01

    Soil organic matter (SOM) plays a key role in the cycling and retention of nitrogen and carbon within soil. Both above and belowground detrital inputs determine the nature and quantity of SOM. Studies on detrital impacts on SOM dynamics are underway at several LTER, ILTER and LTER-affiliated sites using a common experimental design, Detrital Input and Removal Treatments (DIRT). The concept for DIRT was originally based on experimental plots established at the University of Wisconsin Arboretum by Dr. Francis D. Hole in 1956 to study the effects of detrital inputs on pedogenesis. These plots are located on two forested sites and two prairie sites within the arboretum. Manipulations of the forested sites include double litter, no litter and removal of the O and A horizons. Manipulations of the prairie sites include harvest, mulch, bare and burn. These original treatments have largely been maintained since 1956. After 40 years of maintenance, there were significant differences in soil carbon between the double and no litter plots. The double litter plots had increased by nearly 30% while the no litter plots had decreased over 50%. The original DIRT plots are now 50 years old and have been re-sampled, where possible, for total carbon and nitrogen, labile and recalcitrant carbon fractions, net and gross nitrogen mineralization rates, and SOM bioavailability through CO2 respiration. The soils were fractionated by density to examine the role of carbon in each density fraction. The mean age of carbon in each fraction was determined by radiocarbon dating. This sampling and analysis is of special significance because it provides a glimpse into the future SOM trajectories for the new DIRT sites: Harvard Forest (MA), Bousson (PA), Andrews Experimental Forest (OR) and Sikfokut (Hungary).

  11. A Portrait of the Rebel as an Artist: Deconstructing Post-coloniality in Francis Stuart’s Black List, Section H

    Shahriyar Mansouri

    2016-03-01

    Full Text Available The historically ‘interrogative’ nature of the modern Irish novel introduces post-independence Ireland as a locus that is torn between social double standards and political extremes. Rebellious and critical voices channelled through the dialectical discourse of the novel and at once critiqued a State-sponsored voice of internal othering and narratives of decolonization. To sustain its relevance as a medium of criticism the modern Irish novel replaced the classical structure of the novel with narratives that tend to deconstruct the State’s politics of formation. These narratives, this paper suggests, are inherently personal and structurally biographical, enabling the Irish to revisit the past and restructure their perception of critical concepts such as national identity, ideological intolerance, and individual formation. By examining Francis Stuart’s Black List, Section H (1971, and John McGahern’s The Dark (1965, firstly I will identify these resistant voices, which challenged and subverted the socio-political, and educational boundaries. Secondly, I will explore a dividing line that appeared between such critical voices, splitting them into critics who sought a liberated definition of Irishness rooted in the principles of the men of 1916, and rebels who demanded social recognition and political and commercial success. It is the latter group, I argue, that instead of enhancing the standards of life in Ireland became a threat to its very foundation.

  12. Natural knowledge as a propaedeutic to self-betterment: Francis Bacon and the transformation of natural history.

    Lancaster, James A T

    2012-01-01

    This paper establishes the 'emblematic' use of natural history as a propaedeutic to self-betterment in the Renaissance; in particular, in the natural histories of Gessner and Topsell, but also in the works of Erasmus and Rabelais. Subsequently, it investigates how Francis Bacon's conception of natural history is envisaged in relation to them. The paper contends that, where humanist natural historians understood the use of natural knowledge as a preliminary to individual improvement, Bacon conceived self-betterment foremost as a means to Christian charity, or social-betterment. It thus examines the transformation of the moralizing aspect of Renaissance natural history in Bacon's conception of his Great Instauration.

  13. Abortion, metaphysics and morality: a review of Francis Beckwith's defending life: a moral and legal case against abortion choice.

    Nobis, Nathan

    2011-06-01

    In Defending Life: A Moral and Legal Case Against Abortion Choice (2007) and an earlier article in this journal, "Defending Abortion Philosophically"(2006), Francis Beckwith argues that fetuses are, from conception, prima facie wrong to kill. His arguments are based on what he calls a "metaphysics of the human person" known as "The Substance View." I argue that Beckwith's metaphysics does not support his abortion ethic: Moral, not metaphysical, claims that are part of this Substance View are the foundation of the argument, and Beckwith inadequately defends these moral claims. Thus, Beckwith's arguments do not provide strong support for what he calls the "pro-life" view of abortion.

  14. Francis Bacon sob o olhar de Gilles Deleuze: a imagem como intensidade

    Osvaldo Fontes Filho

    2007-12-01

    Full Text Available O ensaio de Gilles Deleuze La logique de la sensation é texto que se detém principalmente na prática e na eficácia da imagem. A pintura de Francis Bacon é ali tomada como paradigma de modernidade ao investir contra os clichês expressivos e ao produzir imagem junto à brutalidade dos fatos, como um contra-efeito do narrativo. Em uma obra que conjura todo modelo a representar, toda história a contar, “alguma coisa se passa”, explica Deleuze, “que define o funcionamento da pintura”. Algo se passa, tem lugar: o acontecimento de uma catástrofe e de uma histeria no ato de pintura que acomete a Figura de modo a transmitir uma potencial violência de reação e de expressão. O “Bacon” de Deleuze apresenta a realidade vivida em uma nova e não-convencional ordem de sensação. Neste artigo, são comentados os modos como o filósofo interpreta os atos físicos da pintura de Bacon — marcas aleatórias, varredura da massa pictural, escansão das superfícies —, procedimentos que introduzem no mundo visual da figuração a variedade caótica dos fatos e sentidos. Mostra-se como as faces e as figuras contorcidas, distorcidas, escorchadas de Bacon recebem uma voz conceitual complementar no texto de Deleuze. Consequentemente, focaliza-se a disposição de alguns conceitos do filósofo: diagrama, Figura, diferença, espaço háptico. Locados no espaço afetivo ou na “lógica da sensação” da pintura baconiana, esses conceitos atribuem legitimidade ao entrelaçamento e à co-implicação entre arte e filosofia. Uma última observação dá conta do fato de a prática da imagem em Bacon, apresentada por Deleuze no palco de uma modernidade particularmente solapada por um “dilúvio anestésico de imagens reprimindo a possibilidade de pensar”, evidenciar para o filósofo os rumos necessariamente sinuosos, “reptilíneos”, do pensamento moderno. Tanto o conceito como a forma criam por catástrofe, por conflagração, por varia

  15. Francis full-load surge mechanism identified by unsteady 2-phase CFD

    Doerfler, P K; Keller, M; Braun, O, E-mail: peter.doerfler@andritz.co [R and D Department, Andritz Hydro Ltd., Zurich (Switzerland)

    2010-08-15

    Francis turbines may produce spontaneous pulsations of pressure and output power when operating at very high discharge. In such cases there is a cavitating central vortex in the draft tube with variable cavity volume V{sub c}. Until today, researchers agree that the main destabilizing agent is the so-called mass flow gain factor, defined as the derivative of cavity volume by the local discharge. Recent studies about 1D high-load stability analysis assumed that the mass-flow gain factor obtained from steady-state vortex data acts on the transient discharge downstream of the cavity. There are however good reasons to question this assumption. Most strikingly, the direct cause of the mass flow gain effect is the increase of swirl produced at the runner exit and hence upstream, not downstream of the cavity. To enhance the reliability of full-load stability predictions, the authors directly investigated the vortex dynamics. The development of the transient cavitating flow in the draft tube was simulated by means of unsteady 2-phase CFD. CFD work started with 1-phase calculations as presented by other authors. This was then extended to a more realistic 2-phase calculation. To contain the computing time within acceptable limits, given the very fine mesh and short time step required, the simulation domain was restricted to the draft tube and, at the same time, the problem was reduced to a basically 2-dimensional rotationally symmetric case. The response of the cavitating draft tube flow to a time-dependent inflow and time-dependent pressure at the draft tube exit was simulated. The results were input to a statistical identification procedure to check possible 1D transient models and find representative parameter values in the sense of a best fit between 1D model and CFD result. As we had suspected, the conventional vortex model with mass flow gain controlled by downstream discharge is not compatible with direct simulation and needs to be modified. The CFD results correspond

  16. THE DESIRE FOR RECOGNITION IN THE CONTEXT OF FRANCIS FUKUYAMA’S UNIVERSAL HISTORY

    T. V. Danylova

    2016-12-01

    Full Text Available Introduction. Francis Fukuyama in his famous book “The End of History and the Last Man” assumes that human history should be considered as the battle of ideologies that reaches its goal in the universalization of Western liberal democracy. Author’s ideas have gained many supporters. At the same time, they were subjected to severe criticism that reflected the important trends of political life and ideological preferences. Leaving aside the criticism based on geopolitical and civilizational confrontation and confusion which confronts Fukuyama’s theory, it should be stated that anthropological aspect of Fukuyama’s theory has vastly evaded philosophical comprehension. Purpose. This article attempts to test Fukuyama’s theory through the lens of philosophical anthropology and analyze human desire for recognition in the context of Fukuyama’s World History. Methodology. The analysis is focused on human desire for recognition as a significant dimension of human nature. The author has used hermeneutical methodology and anthropological integrative approach. Theoretical basis and results. Fukuyama is not satisfied by merely economic interpretation of history emphasizing that human is not simply an economic animal. Economic development fails to explain why people advocate the principles of liberal democracy. The author goes back to Hegel’s non-materialistic view of history based on the struggle for recognition. According to Fukuyama, this deeply rooted human desire for recognition is the great motor of history and cause of tyranny, conflicts, and wars. But at the same time, it also acts as a psychological foundation of many virtues – the spirit of citizenship, courage, and justice. Throughout history, this desire for recognition was not satisfied. Only modern liberal democracy provides universal recognition of all humans ensuring and protecting their rights. Originality. Fukuyama’s concept is important and interesting because it draws

  17. Numerical investigation of a high head Francis turbine under steady operating conditions using foam-extend

    Lenarcic, M; Eichhorn, M; Schoder, S J; Bauer, Ch

    2015-01-01

    In this work the incompressible turbulent flow in a high head Francis turbine under steady operating conditions is investigated using the open source CFD software package FOAM-extend- 3.1. By varying computational domains (cyclic model, full model), coupling methods between stationary and rotating frames (mixing-plane, frozen-rotor) and turbulence models (kω-SST, κε), numerical flow simulations are performed at the best efficiency point as well as at operating points in part load and high load. The discretization is adjusted according the y + -criterion with y + mean > 30. A grid independence study quantifies the discretization error and the corresponding computational costs for the appropriate simulations, reaching a GCI < 1% for the chosen grid. Specific quantities such as efficiency, head, runner shaft torque as well as static pressure and velocity components are computed and compared with experimental data and commercial code. Focusing on the computed results of integral quantities and static pressures, the highest level of accuracy is obtained using FOAM in combination with the full model discretization, the mixing-plane coupling method and the κω-SST turbulence model. The corresponding relative deviations regarding the efficiency reach values of Δη rel ∼ 7% at part load, Δη rel ∼ 0.5% at best efficiency point and Δη rel ∼ 5.6% at high load. The computed static pressures deviate from the measurements by a maximum of Δp rel = 9.3% at part load, Δp rel = 4.3% at best efficiency point and Δp rel = 6.7% at high load. Commercial code in turn yields slightly better predictions for the velocity components in the draft tube cone, reaching a good accordance with the measurements at part load. Although FOAM also shows an adequate correspondence to the experimental data at part load, local effects near the runner hub are captured less accurate at best efficiency point and high load. Nevertheless, FOAM is a reasonable alternative to commercial code

  18. Consumo de alimentos de origem animal e câncer de boca e orofaringe Consumption of animal-derived foods and mouth and oropharyngeal cancer

    Tatiana Natasha Toporcov

    2012-09-01

    Full Text Available OBJETIVO: Avaliar a relação entre alimentos de origem animal e câncer de boca e orofaringe. MÉTODOS: Estudo caso-controle, de base hospitalar, pareado por sexo e idade (± 5 anos com a coleta de dados realizada entre julho de 2006 e junho de 2008. A amostra foi composta por 296 pacientes com câncer de boca e orofaringe e 296 pacientes sem histórico de câncer atendidos em quatro hospitais da cidade de São Paulo (SP, Brasil. Foi aplicado um questionário semiestruturado, para a coleta de dados relativos à condição socioeconômica e aos hábitos deletérios (tabaco e bebidas alcoólicas. Para avaliação do consumo alimentar, utilizou-se um questionário de frequência alimentar qualitativo. A análise se deu por meio de modelos de regressão logística multivariada, que consideraram a hierarquia existente entre as características estudadas. RESULTADOS: Entre os alimentos de origem animal, o consumo frequente de carne bovina (OR = 2,73; IC95% = 1,27-5,87; P OBJECTIVE: Evaluate the relationship between animal-derived foods and mouth and oropharyngeal cancer. METHODS: Hospital-based case-control study matched by sex and age (± 5 years with data collected between July of 2006 and June of 2008. The sample contained 296 patients with mouth and oropharyngeal cancer and 296 patients without a cancer history who were treated in four hospitals in the City of São Paulo, State of São Paulo, Brazil. A semistructured questionnaire was administered to collect data regarding socioeconomic condition and harmful habits (tobacco and alcoholic beverage consumption. To assess eating habits, a qualitative questionnaire that asked about the frequency of food consumption was used. The analysis was rendered by means of multivariate logistic regression models that considered the existing hierarchy among the characteristics studied. RESULTS: Among foods of animal origin, frequent consumption of beef (OR = 2.73; CI95% = 1.27-5.87; P < 0.001, bacon (OR = 2

  19. Níveis sérico e salivar de imunoglobulina A em portadores de câncer da boca e orofaringe Serum and salivary immunoglobulin A levels in patients with cancer of the mouth and oropharynx

    Robson Machado de Souza

    2003-01-01

    Full Text Available OBJETIVO: Avaliar a concentração sérica e salivar de IgA. Pacientes com câncer de cabeça e pescoço podem apresentar alterações na concentração de IgA sérica e salivar, decorrentes de desordem imunológica inespecífica que acompanha o desenvolvimento das lesões malignas. MÉTODOS: Estudo prospectivo em dois grupos: 34 pacientes portadores de carcinoma epidermóide da boca e orofaringe e 34 controles pareados por idade e sexo. Sangue e saliva foram colhidos e as amostras dosadas por nefelometria e imunodifusão radial. A análise estatística incluiu teste t de Student, ANOVA e coeficiente de correlação de Pearson, com limite de significância de 5%. RESULTADOS: A comparação entre os métodos de nefelometria e imunodifusão radial não mostrou diferença (p = 0,039. As concentrações de IgA sérica foram de 279,4 ± 131,7 mg/dl no grupo controle e 310,9 ± 194,1 mg/dl no grupo de estudo. A concentração de IgA salivar, por nefelometria, foi de 17,0 ± 10,4 mg/dl para os controles e 7,2 ± 5,0 mg/dl nos portadores de câncer e a imunodifusão radial mostrou concentrações de 13,7 ± 9,1 mg/dl e 5,6 ± 4,2 mg/dl para controles e grupo de estudo, respectivamente. Não foram encontradas correlações entre idade, estádio clínico da doença e níveis sérico ou salivar de IgA. CONCLUSÃO: Os indivíduos com câncer da boca e orofaringe apresentaram concentração sérica de IgA semelhante aos controles, mas com concentração de IgA salivar menor no grupo oncológico. Causas associadas à diminuição de IgA salivar como desnutrição, estresse e uso de tabaco podem estar relacionadas a estes achados.OBJECTIVE: Patients carriers of head and neck cancer (HNC may show changes in concentrations of serum and salivary IgA owing to an inespecific immunologic disorder that follows the development of malignant lesions. PURPOSE: Evaluate the serum and salivary IgA levelS in Patients With Hnc. METHODS: A prospective study based on a sample

  20. Self-validated calculation of characteristics of a Francis turbine and the mechanism of the S-shape operational instability

    Zhang, Z; Titzschkau, M

    2012-01-01

    A calculation method has been presented to accurately estimate the characteristics of a Francis turbine. Both the shock loss at the impeller inlet and the swirling flow loss at the Impeller exit have been confirmed to dominantly influence the turbine characteristics and particularly the hydraulic efficiency. Both together totally govern the through flow of water through the impeller being at the rest. Calculations have been performed for the flow rate, the shaft torque and the hydraulic efficiency and compared with the available measurements on a model turbine. Excellent agreements have been achieved. Some other interesting properties of the turbine characteristics could also be derived from the calculations and verified by experiments. For this reason and because of not using any unreliable assumptions the calculation method has been confirmed to be self-validated. The operational instability in the upper range of the rotational speed, known as the S-shape instability, is ascribed to the total flow separation and stagnation at the impeller inlet. In that range of the rotational speed, the operation of the Francis turbine oscillates between pump and turbine mode.

  1. Ocorrência da Mansonella ozzardi (Nematoda, Onchocercidae em comunidades ribeirinhas do rio Purus, Município de Boca do Acre, Amazonas, Brasil Occurrence of Mansonella ozzardi (Nematoda, Onchocercidae in riverine communities of the Purus river, Boca do Acre municipality, Amazonas State, Brazil

    Jansen Fernandes Medeiros

    2009-06-01

    Full Text Available Este estudo teve o objetivo de estimar as prevalências de Mansonella ozzardi e calcular taxa de infecção parasitária nos simulídeos. O trabalho foi realizado em comunidades ribeirinhas do rio Purus, Boca do Acre, Amazonas, Brasil. As prevalências foram obtidas por meio do método de gota espessa de sangue obtido por porção digital. Os simulídeos coletados foram dissecados para estimar a taxa de infecção parasitária. A prevalência de M. ozzardi foi de 27,3% (282/77. Foram observadas maiores prevalências nos homens (31,97% que nas mulheres (22,22%, nos agricultores (48% e nos indivíduos entre: 38-47 (60%, 48-57 (66,66% e 58-67 (75%. A microfilaremia foi maior nos indivíduos entre 58-67 anos (média = 58,41mf/40µL, sexo masculino (41,44mf/40µL e nos agricultores (49,94mf/40µL. Somente o simulídeo Cerqueirellum amazonicum foi encontrado infectado com taxa de infecção parasitária de 0,98%.The study aimed to estimate the prevalence of Mansonella ozzardi and calculate the parasitic infection rate in simuliid blackflies. The research was conducted in communities on the Purus River, Boca do Acre municipality, Amazonas State, Brazil. Prevalence was measured using the thick smear method. Captured blackflies were dissected to verify the parasitic infection rate. M. ozzardi prevalence was 27.30% (77/282. The study showed higher prevalence in men (31.97% than women (22.22%, farmers (48.99%, and individuals in the 38-47 (60.00%, 48-57 (66.66%, and 58-67-year age brackets (75.00%. Microfilaremia was higher in individuals 58 to 67 years of age (average= 58.41mf/40µl, men (41.44mf/40µl, and farmers (49.94mf/40µl. Only the simuliid Cerqueirellum amazonicum was found infected with a parasitic infection rate of 0.98%.

  2. Effect of cadmium on the floor of the mouth on rats during lactation Efeito do cádmio no soalho da boca de ratos durante a lactação

    Lara Cristina Picoli

    2004-06-01

    Full Text Available Cadmium (Cd present in the air, drinking water and food has the potential to affect the health of people, mainly those who live in highly industrialized regions. Cd affects placental function, may cross the placental barrier and directly modify fetal development. It is also excreted into milk. The body is particularly susceptible to Cd exposure during perinatal period. The effect on rat oral epithelium (floor of the mouth after continuous exposure to drinking water containing low levels of Cd during lactation was studied. Female rats were supplied with ad libitum drinking water containing 300 mg/l of CdCl2 throughout the whole lactation period. Control animals received a similar volume of water without Cd. Lactating rats (21 day-old were killed by lethal dose of anesthetic. The heads were retrieved, fixed in "alfac" solution (alcohol, acetic acid and formaldehyde for 24 h, serially sectioned in frontal plane, at the level of the first molars. The 6 µm sections were then stained with hematoxylin and eosin. Nuclear epithelium parameters were estimated, as well as cytoplasm and cell volume, nucleus/cytoplasm ratio, numeric and surface densities, and epithelial thickness. Mean body weight was 34.86 g for the control group and 18.56 g for the Cd-treated group. Histologically, the floor of the mouth epithelium was thinner in the treated group, with smaller and more numerous cells. In this experiment, Cd induced epithelial hypotrophy, indicating a direct action in oral mucosa cells, besides retarded development of the pups.O cádmio (Cd do ar, da água e dos alimentos tem o potencial de afetar a saúde das pessoas, principalmente daquelas que vivem em regiões altamente industrializadas. O Cd afeta a função placentária, podendo atravessar a barreira placentária e provocar distúrbios no desenvolvimento fetal. Pode, também, ser excretado pelo leite. O organismo é particularmente susceptível à exposição ao Cd no período perinatal. Foi

  3. Rotor optimization of a Francis type hydraulic turbine through the computer flow analysis (CFD); Optimizacion del rodete de una turbina hidraulica tipo Francis a traves del analisis computacional del flujo (CFD)

    Rosado Tamariz, Erick

    2007-06-15

    In the analysis of fluid behavior through hydraulic turbines, two basic methodologies for flow analysis and optimization processes in turbines are used, which are: a) modeled of flow through the entire turbine (joint), or modeled one of each component separately, obtaining satisfactory results by both methodologies. The analysis of computational fluids dynamics (CFD) to geometries improved by means of finite volume method (FVM) with their corresponding initials and boundary conditions is made, to solve a system differential equations of second order that correspond to the flow around the dominion of runner blades; considering nonviscous flow and the implementation of the two equations models for the solution of the equations that govern the turbulent flow. Also, used parameterization techniques based in a parametric geometry an objective function and the diminution of cavitation. This work presents the optimization of a runner from a Francis hydro turbine for a 75 MW considering three different load conditions (75%, 85% and 100%) through CFD as a part of the hydraulic analysis for modernization of the actual condition of a power generation unit. Francis runner optimization is made, through a previous analysis of CFD by means of the FVM, considering the viscous effects of the fluid and the model of turbulence developed by Sparlart and Allmaras; modeling the wicket and runner separately. Later the generation of a parametric model of the runner is made and the simulation for the generation of data base is formed. Finally an objective function is considered to develop the optimal geometry of the runner blades. The results are presented in a graphic form in such a way, that it shows the distributions of pressure and speed around the blades runner, the geometrical and performance (efficiency and power) comparison between original and optimized model. [Spanish] En el analisis del comportamiento del fluido a traves de turbinas hidraulicas, se emplean dos metodologias

  4. Tod in den Anden. Ein Brief Francis Halls an Humboldt 1831 und seine historischen und politischen Hintergründe

    Thomas Schmuck

    2013-12-01

    Full Text Available Zusammenfassung Der Forschungsreisende Francis Hall kam als Soldat nach Südamerika und betätigte sich hier auch als Pflanzensammler, Reiseschriftsteller und Bergsteiger. Er war Freund und Briefpartner Jeremy Benthams und versuchte gemeinsam mit Jean-Baptiste Boussingault den Chimborazo zu besteigen. Der liberale Journalist wurde 1833 in bürgerkriegsähnlichen Unruhen in Ecuador ermordet. Der einzige Brief Halls an Humboldt, in dem er diesen für die Naturerschließung des Landes zu gewinnen versucht, eine Sammlung andiner Pflanzen übersendet und seine Einschätzung zur politischen Lage und Zukunft Südamerikas kundtut, wird hier veröffentlicht und kommentiert. Abstract The British explorer Francis Hall was active in South-America as a soldier, a collector of plants, a writer of travelogues and a mountaineer. Together with Jean-Baptiste Boussingault he failed in ascending the Chimborazo. Friend and correspondent of Jeremy Bentham and also liberal journalist, Hall was killed during riots in Ecuador in 1833. In one single letter addressed to Humboldt, which is presented here, Hall tries to awaken interest for Ecuador, develops his views on the political future of South America and sends a collection of plants from the Andes. Resumen El explorador británico Francis Hall llegó a América del Sur como soldado y allí también se dedicó a la colección de plantas, a escribir sobre viajes y a hacer alpinismo. Intentó subir al Chimborazo con Jean-Baptiste Boussingault. El periodista liberal, amigo de Jeremy Bentham con el que también mantenía correspondencia, fue asesinado en los disturbios de 1833 en Ecuador. En la única carta de Hall a Humboldt, que está publicada y comentada aquí, Hall intenta despertar el interés de Humboldt por la naturaleza del país enviando una colección de plantas andinas y dando su opinión sobre la situación política y el futuro de América del Sur. (Traducción: Christine Lebas

  5. Francis Bacon czyli Diego Velázquez na fotelu dentystycznym - malarskie i inne cytaty jako "dodatek" do rozpraszającego się życia

    van Nieukerken, A.

    2014-01-01

    "Francis Bacon or Diego Velázquez in a dentist’s chair" - pictorial and other kinds of quotations as an addition to a disintegrating life The mature poetry of Tadeusz Różewicz seems to be at odds with both modernist and postmodern literary tenets. It undeniably makes abundant use of intertextuality

  6. Dialoguing from a Fixed Point: How Aristotle and Pope Francis Illuminate the Promise--and Limits--of Inclusion in Catholic Higher Education

    Petrusek, Matthew Richard

    2017-01-01

    This article examines the meaning of the word "inclusion" as it relates to Catholic identity in higher education. Noting the widespread presence of this value in the mission statements of Catholic colleges, the article draws on insights from Aristotelian logic and Pope Francis's theology of encounter to argue that inclusion can only be…

  7. If Auditors Are Like Belgian Beers, Which Style Would You Prefer? : Discussion of “Auditor Style and Financial Statement Comparability” by Francis, Pinnuck, and Watanabe .

    Bruynseels, L.M.L.; Brenk, van H.M.

    2016-01-01

    Recent research by Francis, Pinnuck, and Watanabe (2014) has shown that financial reporting outcomes are influenced by the audit firm’s unique audit style. They argue that audit firm styles are driven by their “unique set of internal working rules that guide the auditor’s application of accounting

  8. St. Francis Rain Garden Water Quality Sampling Interim Data Report; Total Nitrogen, Total Phosphorus, Sediments or Solids, and E. Coli for the period April to June, 2014

    This interim data reported is being provided per request to the Metropolitan Sewer District (MSD) to provide summary statistics on a limited set of water quality parameters as measured at the St. Francis Rain Garden site in the Lick Run Valley as it pertains to MSD's Project Grou...

  9. The Red-Attractiveness Effect, Applying the Ioannidis and Trikalinos (2007b) Test, and the Broader Scientific Context: A Reply to Francis (2013)

    Elliot, Andrew J.; Maier, Markus A.

    2013-01-01

    Francis (2013) tested for and found evidence of publication bias in 1 of the 3 focal relations examined in Elliot et al. (2010), that between red and attractiveness. He then called into question the research as a whole and the field of experimental psychology more generally. Our reply has 3 foci. First, we attend to the bottom line regarding the…

  10. The Battle between the Biometricians and the Mendelians: How Sir Francis Galton's Work Caused His Disciples to Reach Conflicting Conclusions about the Hereditary Mechanism

    Gillham, Nicholas W.

    2015-01-01

    Francis Galton, Charles Darwin's cousin, had wide and varied interests. They ranged from exploration and travel writing to fingerprinting and the weather. After reading Darwin's "On the Origin of Species," Galton reached the conclusion that it should be possible to improve the human stock through selective breeding, as was the…

  11. Renaissance Epyllions: A Comparative Reading of Christopher Marlowe's "Hero and Leander," Thomas Lodge's "Scylla's Metamorphosis" and Francis Beaumont's "Salmacis and Hermaphroditus"

    Mahmoudi, Yazdan

    2016-01-01

    The present paper is supposed to compare and contrast three of these masterpieces written the Renaissance period. The epyllions under study are Christopher Marlowe's "Hero and Leander," Thomas Lodge's "Scylla's Metamorphosis" and Francis Beaumont's "Salmacis and Hermaphroditus." Bush believes that "the influence…

  12. Geochemical And Hydrodynamic Behavior Of The Karstic Aquifer System In The Portion Between Akumal And Boca Paila, In The South Eastern Coast Of The Yucatan Peninsula.

    Velazquez Oliman, G.; Leal Bautista, R. M.; Perry, E. C.; Carrol, M.; Wagner, N.; Castillo Oliman, P.

    2008-12-01

    We report here aspects of the geochemistry and hydrodynamics of a nearly 450 km2 area that constitutes part of the rapidly developing tourist corridor between Akumal and Boca Paila, Quintana Roo, Mexico. Some of the largest explored submerged cave systems in the world, including Nohoch Nah Chic and Dos Ojos, are within the study area. The presence of these and other highly permeable conduits highlights the importance of a better understanding of the aquifer system both to assess its vulnerability and to facilitate sustainable water management. This study focuses on major ion, trace element, and stable isotope geochemistry of groundwater and on monitoring system hydrodynamics through water levels measurements. Sampling along approximately 30 km of coast was accomplished by means of a network of 29 sampling sites arranged along three NW-SE transverse lines running approximately perpendicular to the coast and each extending about 16 km inland. To date 52 samples have been taken. In addition, vertical specific conductivity profiles have helped delineate the thickness of the freshwater lens, which has a maximum thickness of 33.5 m in the southwestern part of the study area, approximately 13.5 km from the coast. In the northeastern corner of the study area, 7.5 m of brackish water overlies sea water near the coast. Water level monitoring is by means of Schlumberger pressure transducers installed at 11 sites. Water table changes record tidal oscillation, confirming the interconnectedness of the system, an observation supported by conductivity measurements that indicate oscillatory vertical movement of the saline interface. (SO4/Cl) ratios, expressed as 1000(SO4/Cl) in meq/kg, are useful tracers of groundwater provenance. The ratio is approximately 100 for seawater and is much greater for groundwater in southern Quintana Roo that has dissolved evaporite (Perry et al, 2002). Ratios in the study area, which are 100 or less, indicate no contact with evaporite. Background

  13. Il De uno alla luce dell’Exemplum tractatus de iustitia universali, sive de fontibus iuris di Francis Bacon

    Romana Bassi

    2016-11-01

    Full Text Available [Reading “De uno” in light of Francis Bacon’s “Exemplum tractatus de iustitia universali, sive de fontibus iuris”]. Although Vico was admittedly disappointed by Bacon’s Exemplum tractatus, a parallel reading of this text and De uno can provide insights as to how Vico ended up having to confront a series of issues: how does the universal law project itself into history? Where does the law stem from? Is there a link between law, occasion, and utility? What are the sources and the scope of authority? How does violence affect the law? What role for religion and piety? How to devise a philology for the laws and ancient fables? Bacon’s scattered aphorisms offer glimpses into problems which find a solution in the all-encompassing order of De uno.

  14. Francis-99 turbine numerical flow simulation of steady state operation using RANS and RANS/LES turbulence model

    Minakov, A.; Platonov, D.; Sentyabov, A.; Gavrilov, A.

    2017-01-01

    We performed numerical simulation of flow in a laboratory model of a Francis hydroturbine at three regimes, using two eddy-viscosity- (EVM) and a Reynolds stress (RSM) RANS models (realizable k-ɛ, k-ω SST, LRR) and detached-eddy-simulations (DES), as well as large-eddy simulations (LES). Comparison of calculation results with the experimental data was carried out. Unlike the linear EVMs, the RSM, DES, and LES reproduced well the mean velocity components, and pressure pulsations in the diffusor draft tube. Despite relatively coarse meshes and insufficient resolution of the near-wall region, LES, DES also reproduced well the intrinsic flow unsteadiness and the dominant flow structures and the associated pressure pulsations in the draft tube.

  15. Francis Pomponi, Vendetta, justice et politique en Corse. « L’affaire Viterbi » (1789-1821

    Jean-Claude Farcy

    2010-08-01

    Full Text Available Causes célèbres, crimes et criminels sortant de l’ordinaire ont toujours passionné l’opinion et donné naissance à une littérature à succès, revenant périodiquement sur les mêmes affaires judiciaires. Les historiens de la criminalité et de la justice ont, plus récemment, emprunté cette voie et revisité nombre de ces affaires en les replaçant, avec plus ou moins de succès, dans le contexte de leur époque. L’ouvrage de Francis Pomponi s’inscrit dans cette perspective, celle d’une étude de cas, d...

  16. Using clinical supervision to improve the quality and safety of patient care: a response to Berwick and Francis.

    Tomlinson, Jonathon

    2015-06-11

    After widely publicised investigations into excess patient deaths at Mid Staffordshire hospital the UK government commissioned reports from Robert Francis QC and Professor Don Berwick. Among their recommendations to improve the quality and safety of patient care were lifelong learning, professional support and 'just culture'. Clinical supervision is in an excellent position to support these activities but opportunities are in danger of being squeezed out by regulatory and managerial demands. Doctors who have completed their training are responsible for complex professional judgements for which narrative supervision is particularly helpful. With reference to the literature and my own practice I propose that all practicing clinicians should have regular clinical supervision. Clinical supervision has patient-safety and the quality of patient care as its primary purposes. After training is completed, doctors may practice for the rest of their career without any clinical supervision, the implication being that the difficulties dealt with in clinical supervision are no longer difficulties, or are better dealt with some other way. Clinical supervision is sufficiently flexible to be adapted to the needs of experienced clinicians as its forms can be varied, though its functions remain focused on patient safety, good quality clinical care and professional wellbeing. The evidence linking clinical supervision to the quality and safety of patient care reveals that supervision is most effective when its educational and supportive functions are separated from its managerial and evaluative functions. Among supervision's different forms, narrative-based-supervision is particularly useful as it has been developed for clinicians who have completed their training. It provides ways to explore the complexity of clinical judgements and encourages doctors to question one another's authority in a supportive culture. To be successful, supervision should also be professionally led and

  17. LDV survey of cavitation and resonance effect on the precessing vortex rope dynamics in the draft tube of Francis turbines

    Favrel, A.; Müller, A.; Landry, C.; Yamamoto, K.; Avellan, F.

    2016-11-01

    The large-scale penetration of the electrical grid by intermittent renewable energy sources requires a continuous operating range extension of hydropower plants. This causes the formation of unfavourable flow patterns in the draft tube of turbines and pump-turbines. At partial load operation, a precessing cavitation vortex rope is formed at the Francis turbine runner outlet, acting as an excitation source for the hydraulic system. In case of resonance, the resulting high-amplitude pressure pulsations can put at risk the stability of the machine and of the electrical grid to which it is connected. It is therefore crucial to understand and accurately simulate the underlying physical mechanisms in such conditions. However, the exact impact of cavitation and hydro-acoustic resonance on the flow velocity fluctuations in the draft tube remains to be established. The flow discharge pulsations expected to occur in the draft tube in resonance conditions have for instance never been verified experimentally. In this study, two-component Laser Doppler Velocimetry is used to investigate the axial and tangential velocity fluctuations at the runner outlet of a reduced scale physical model of a Francis turbine. The investigation is performed for a discharge equal to 64 % of the nominal value and three different pressure levels in the draft tube, including resonance and cavitation-free conditions. Based on the convective pressure fluctuations induced by the vortex precession, the periodical velocity fluctuations over one typical precession period are recovered by phase averaging. The impact of cavitation and hydro-acoustic resonance on both axial and tangential velocity fluctuations in terms of amplitude and phase shift is highlighted for the first time. It is shown that the occurrence of resonance does not have significant effects on the draft tube velocity fields, suggesting that the synchronous axial velocity fluctuations are surprisingly negligible compared to the velocity

  18. FRamework Assessing Notorious Contributing Influences for Error (FRANCIE): Perspective on Taxonomy Development to Support Error Reporting and Analysis

    Lon N. Haney; David I. Gertman

    2003-04-01

    Beginning in the 1980s a primary focus of human reliability analysis was estimation of human error probabilities. However, detailed qualitative modeling with comprehensive representation of contextual variables often was lacking. This was likely due to the lack of comprehensive error and performance shaping factor taxonomies, and the limited data available on observed error rates and their relationship to specific contextual variables. In the mid 90s Boeing, America West Airlines, NASA Ames Research Center and INEEL partnered in a NASA sponsored Advanced Concepts grant to: assess the state of the art in human error analysis, identify future needs for human error analysis, and develop an approach addressing these needs. Identified needs included the need for a method to identify and prioritize task and contextual characteristics affecting human reliability. Other needs identified included developing comprehensive taxonomies to support detailed qualitative modeling and to structure meaningful data collection efforts across domains. A result was the development of the FRamework Assessing Notorious Contributing Influences for Error (FRANCIE) with a taxonomy for airline maintenance tasks. The assignment of performance shaping factors to generic errors by experts proved to be valuable to qualitative modeling. Performance shaping factors and error types from such detailed approaches can be used to structure error reporting schemes. In a recent NASA Advanced Human Support Technology grant FRANCIE was refined, and two new taxonomies for use on space missions were developed. The development, sharing, and use of error taxonomies, and the refinement of approaches for increased fidelity of qualitative modeling is offered as a means to help direct useful data collection strategies.

  19. Space and time reconstruction of the precessing vortex core in Francis turbine draft tube by 2D-PIV

    Favrel, A.; Müller, A.; Landry, C.; Yamamoto, K.; Avellan, F.

    2016-11-01

    Francis turbines operating at part load conditions experience the development of a high swirling flow at the runner outlet, giving rise to the development of a cavitation precessing vortex rope in the draft tube. The latter acts as an excitation source for the hydro-mechanical system and may jeopardize the system stability if resonance conditions are met. Although many aspects of the part load issue have been widely studied in the past, the accurate stability analysis of hydro-power plants remains challenging. A better understanding of the vortex rope dynamics in a wide range of operating conditions is an important step towards the prediction and the transposition of the pressure fluctuations from reduced to prototype scale. For this purpose, an investigation of the flow velocity fields at the outlet of a Francis turbine reduced scale physical model operating at part load conditions is performed by means of 2D-PIV in three different horizontal cross-sections of the draft tube cone. The measurements are performed in cavitation-free conditions for three values of discharge factor, comprised between 60% and 81% of the value at the Best Efficiency Point. The present article describes a detailed methodology to properly recover the evolution of the velocity fields during one precession cycle by means of phase averaging. The vortex circulation is computed and the vortex trajectory over one typical precession period is finally recovered for each operating point. It is notably shown that below a given value of the discharge factor, the vortex dynamics abruptly change and loose its periodicity and coherence.

  20. Arrecifes coralinos de Bocas del Toro, Panamá: IV. Distribución, estructura y estado de conservación de los arrecifes continentales de Península Valiente

    Héctor M. Guzmán

    2001-03-01

    Full Text Available Este estudio, cuarto y último donde se describen los arrecifes coralinos de Bocas del Toro y su estado de conservación en forma individual, contempla a 14 arrecifes continentales en 129 km de costa comprendidos entre la Península Valiente y el Río Calovébora. Se encontró una cobertura de coral vivo promedio para esta región de 17.1% (" 3.6%, principalmente en el sector occidental de la península, en particular la zona interna de Bahía Bluefield, y en el sector de Tobobe. La cobertura de coral aumenta con la profundidad ( 5 m en la mayoría de los arrecifes. Dos especies de coral, Porites furcata y Acropora palmata, dominan las aguas superficiales. El coral Acropora palmata se encontró abundante en seis de los 14 arrecifes estudiados concentrándose su mayor presencia hacia el sector de la Ensenada Tobobe y Punta Valiente. Los patrones de reclutamiento son similares en distribución a los de mayor cobertura, presentándose densidades promedios de 4 reclutas/m² (hasta 9 reclutas/m² principalmente Agaricia spp., Porites astreoides y Siderastrea siderea. La mayor diversidad de corales y esponjas se registró hacia el sector occidental de Península Valiente encontrandose 55 especies de corales en el área de estudio, incluyendo dos nuevos registros para Bocas del Toro (59 especies en total; Dichocoenia stellaris y Madracis luciphila, incrementando también la diversidad de corales de Panamá a 65 especies. Se encontraron 24 especies de octocorales, informándose por primera vez tres especies: Gorgonia mariae, Muriceopsis sulphurea y Muricea laxa, aumentando así en un 10% la diversidad de Bocas del Toro a 32 especies en total. Se registraron cinco nuevas especies de esponjas, lo que representa un incremento del 9% en el número de especies que hacen un total de 58 para Bocas del Toro. La diversidad total de esponjas en el área de estudio fue de 48 especies. Se encontraron grandes poblaciones de Acropora palmata en la Ensenada de Tobobe

  1. CONSIDERATION ABOUT A CONSERVACIONIST STUDY ABOUT THE MICRO BASINS HYDROGRAPHICS OF THE RIVERS DOS APERTADOS AND TRÊS BOCAS, NORTH OF PARANÁ – BRAZIL

    Walquíria Machado

    2005-05-01

    Full Text Available The environmental planning in hydrographic micro basins may minimize the incidence of environmental impacts as consequence of the human indiscriminate action. The hydrographic basin is worldly recognized as the best unit for handling natural resources. Thus, a methodology for diagnosis of the real situation of natural resources, in a basin, turns to be a necessary tool for the preservation and management of these resources. The identification of the different kinds of predominant vegetables informs, chiefly, about the level of soil protection, since the vegetation is responsible for the protection against the impacts of the raindrops (splash, by the reduction of the speed of surface outflow (runoff, through the increasing of the land ruggedness and greater soil structure constitution that may offer greater resistance to the action of the erosive processes. Besides, the collected data about the covering vegetation generally comes along with the information about the current use of the soil, since they both are strictly related. Several authors have pointed out the importance of geo morphological mappings of environmental planning projects. The use of the cartography and geo morphological information aim to represent the physiography of the landscape,considering the elements identification or environment of transport and accumulation, characterization of the morph genetics processes, and the human action implications. From the environmental point of view, the landforms are factors that influence the local hydrological conditions and specific top climatic. In this sense, the micro basins of Ribeirões dos Apertados and Três Bocas located between the municipalities of Londrina and Arapongas, North of Paraná, though constituted by fertile soils, Nitossolos and Argissolos, present a mainframe of environmental degradation common to other micro basins of the region, or, the lack of banks vegetation, the action of erosive processes, blocking the water

  2. Road Bridges and Culverts, MDTA Culverts, Culverts on John F. Kennedy Highway (I95), Baltimore Harbor Tunnel Throughway, Francis Scott Key Bridge, Bay bridge, Nice Bridge, Published in 2010, 1:1200 (1in=100ft) scale, Maryland Transportation Authority.

    NSGIC State | GIS Inventory — Road Bridges and Culverts dataset current as of 2010. MDTA Culverts, Culverts on John F. Kennedy Highway (I95), Baltimore Harbor Tunnel Throughway, Francis Scott Key...

  3. THE SONATA FOR CLARINET AND PIANO BY FRANCIS POULENC FROM THE POINT OF VIEW OF THE GENRE EVOLUTION OF THE 20th CENTURY SONATA

    ROJNOVEANU ANGELA

    2015-09-01

    Full Text Available The article focuses on the analysis of the Sonata for clarinet and piano by Francis Poulenc that still presents great interest nowadays. This is a masterpiece of twenty century music – an original composition considered from the point of view of its stylistic structure in the context of the experiments carried out in the composition techniques of last century. The author ap­proaches problems of opus themes and architectonics as well as some aspects of musical language.

  4. Compassionate care in radiography recruitment, education and training: A post-Francis Report review of the current literature and patient perspectives

    Bleiker, J.; Knapp, K.M.; Hopkins, S.; Johnston, G.

    2016-01-01

    Compassion is elemental in the care of a patient during their medical imaging (MI) procedure and is highly topical in the light of the Francis Report. The patient–practitioner interaction is an amalgam of context, communication and individual differences, and whilst compassion is a term in common parlance in the media, policy and radiographers' professional documents, its meaning and manifestation in radiography recruitment, education and practice are less clearly articulated. A review of the existing literature was undertaken, including a small scale study exploring patients' experiences in diagnostic medical imaging. Themes from the study included communication; competence; emotions; attitudes and relationships, but notably absent was any mention of compassion per se. Radiography research would benefit from further exploratory work into the nature of compassionate patient care in the unique context of the medical imaging encounter; offering an evidence-based contribution to radiography in the light of the Francis Report. - Highlights: • An increased focus on compassion was recommended in the Francis Report. • Best compassionate care is a requirement in radiographers' Code of Professional Conduct. • The meaning of compassionate patient care in radiography is not well understood. • Equally neither is the expression of compassion in radiography. • Research into compassion will contribute to evidence-based practice in radiography.

  5. Du soutenable à l’insoutenable : le tourisme à Bocas del Toro (Panama. L’impact des logiques nationales et globales dans la déstructuration progressive d’une société d’accueil From sustainable to the unsustainable: tourism in Bocas del Toro (Panama. The impact of national and global logic in the gradual collapse of a host society Del sostenible al insostenible : el turismo en Bocas del Toro (Panamá. El impacto de la lógica nacional y mundial en el colapso gradual de una sociedad de acogida

    Camille Le Masne

    2010-06-01

    Full Text Available L’objectif poursuivi par cet article, issu d’une enquête d’un mois sur l’archipel de Bocas del Toro en février 2009, est d’évaluer les mutations engendrées par l’avènement du tourisme sur l’île de Colon depuis une vingtaine d’année. Le développement de ce boom touristique en deux étapes assez différenciées – celle du tourisme dit soutenable de 1990 à 2002, puis seconde phase avec un  tourisme non contrôlé – nous a permis de dresser une analyse historique des rapports qu’entretiennent les populations à l’activité touristique. Notre enquête, qui porte sur les perceptions des habitants actuels de l’île, a mis en lumière les acteurs et leur rôle en fonction de leur temps d’arrivée dans l’île, lui-même lié au basculement d’une conception du tourisme à une autre.The aim of this article, based on a survey of one month on the archipelago of Bocas del Toro in February 2009, is to assess the changes brought by the advent of tourism on Colon’ island for twenty year. The development of the tourism boom in two phases sufficiently differentiated - that of sustainable tourism, says 1990 to 2002, then second phase with a non-tourism control - allowed us to develop a historical analysis of the relationship between populations and tourism. Our investigation, which focuses on the perceptions of the present inhabitants of the island, has highlighted the actors and their role according to their time of arrival on the island; itself linked to the changeover of a concept of tourism another.El objetivo de este artículo, basado en una encuesta de un mes en el archipiélago de Bocas del Toro en febrero de 2009, es evaluar los cambios producidos por la llegada del turismo en la isla de Colon durante veinte año. El desarrollo del auge del turismo en dos fases suficientemente diferenciados - la de un turismo sostenible, dijo desde 1990 hasta 2002, entonces la segunda fase con un turismo no contol - nos ha

  6. La prolongation de la vie humaine selon Francis Bacon. Ou : quel Tithon voulons-nous être ?

    Dominique Weber

    2011-07-01

    Full Text Available Afin de comprendre avec exactitude la manière dont Francis Bacon envisage la question de la prolongation de la vie humaine, il faut impérativement examiner l’assise théologique de la réflexion du philosophe à ce sujet. Il convient aussi de restituer l’intégration de cette réflexion dans les objectifs plus amples de la philosophie naturelle nouvelle. Enfin, il est nécessaire de comprendre les dimensions proprement morales de la question. Car la prolongation de la vie humaine n’est pas seulement, au sein de la philosophie naturelle nouvelle, un cas parmi d’autres des recherches qu’il faut désormais effectuer : en réalité, c’est elle qui lui donne et qui lui fixe son sens ; avec elle se joue l’effectivité de l’identité espérée entre science et puissance. Mais il faut encore préciser qu’il ne s’agit aucunement pour l’homme de vieillir pour vieillir : il s’agit pour lui de pouvoir vieillir bien. Les leçons que Bacon tire de la fable de Tithon sont ici véritablement décisives.

  7. An Intelligent Optimization Method for Vortex-Induced Vibration Reducing and Performance Improving in a Large Francis Turbine

    Xuanlin Peng

    2017-11-01

    Full Text Available In this paper, a new methodology is proposed to reduce the vortex-induced vibration (VIV and improve the performance of the stay vane in a 200-MW Francis turbine. The process can be divided into two parts. Firstly, a diagnosis method for stay vane vibration based on field experiments and a finite element method (FEM is presented. It is found that the resonance between the Kármán vortex and the stay vane is the main cause for the undesired vibration. Then, we focus on establishing an intelligent optimization model of the stay vane’s trailing edge profile. To this end, an approach combining factorial experiments, extreme learning machine (ELM and particle swarm optimization (PSO is implemented. Three kinds of improved profiles of the stay vane are proposed and compared. Finally, the profile with a Donaldson trailing edge is adopted as the best solution for the stay vane, and verifications such as computational fluid dynamics (CFD simulations, structural analysis and fatigue analysis are performed to validate the optimized geometry.

  8. Nonlinear dynamic analysis and robust controller design for Francis hydraulic turbine regulating system with a straight-tube surge tank

    Liang, Ji; Yuan, Xiaohui; Yuan, Yanbin; Chen, Zhihuan; Li, Yuanzheng

    2017-02-01

    The safety and stability of hydraulic turbine regulating system (HTRS) in hydropower plants become increasingly important since the rapid development and the broad application of hydro energy technology. In this paper, a novel mathematical model of Francis hydraulic turbine regulating system with a straight-tube surge tank based on a few state-space equations is introduced to study the dynamic behaviors of the HTRS system, where the existence of possible unstable oscillations of this model is studied extensively and presented in the forms of the bifurcation diagram, time waveform plot, phase trajectories, and power spectrum. To eliminate these undesirable behaviors, a specified fuzzy sliding mode controller is designed. In this hybrid controller, the sliding mode control law makes full use of the proposed model to guarantee the robust control in the presence of system uncertainties, while the fuzzy system is applied to approximate the proper gains of the switching control in sliding mode technique to reduce the chattering effect, and particle swarm optimization is developed to search the optimal gains of the controller. Numerical simulations are presented to verify the effectiveness of the designed controller, and the results show that the performances of the nonlinear HTRS system assisted with the proposed controller is much better than that with the commonly used optimal PID controller.

  9. Influence of upstream disturbance on the draft-tube flow of Francis turbine under part-load conditions

    Chen, Ting; Zheng, Xianghao; Zhang, Yu-ning; Li, Shengcai

    2018-02-01

    Owing to the part-load operations for the enhancement of grid flexibility, the Francis turbine often suffers from severe low-frequency and large-amplitude hydraulic instability, which is mostly pertinent to the highly unsteady swirling vortex rope in the draft tube. The influence of disturbances in the upstream (e.g., large-scale vortex structures in the spiral casing) on the draft-tube vortex flow is not well understood yet. In the present paper, the influence of the upstream disturbances on the vortical flow in the draft tube is studied based on the vortex identification method and the analysis of several important parameters (e.g., the swirl number and the velocity profile). For a small guide vane opening (representing the part-load condition), the vortices triggered in the spiral casing propagate downstream and significantly affect the swirling vortex-rope precession in the draft tube, leading to the changes of the intensity and the processional frequency of the swirling vortex rope. When the guide vane opening approaches the optimum one (representing the full-load condition), the upstream disturbance becomes weaker and thus its influences on the downstream flow are very limited.

  10. Proper Orthogonal Decomposition of Pressure Fields in a Draft Tube Cone of the Francis (Tokke) Turbine Model

    Stefan, D; Rudolf, P

    2015-01-01

    The simulations of high head Francis turbine model (Tokke) are performed for three operating conditions - Part Load, Best Efficiency Point (BEP) and Full Load using software Ansys Fluent R15 and alternatively OpenFOAM 2.2.2. For both solvers the simulations employ Realizable k-e turbulence model. The unsteady pressure pulsations of pressure signal from two monitoring points situated in the draft tube cone and one behind the guide vanes are evaluated for all three operating conditions in order to compare frequencies and amplitudes with the experimental results. The computed velocity fields are compared with the experimental ones using LDA measurements in two locations situated in the draft tube cone. The proper orthogonal decomposition (POD) is applied on a longitudinal slice through the draft tube cone. The unsteady static pressure fields are decomposed and a spatio-temporal behavior of modes is correlated with amplitude-frequency results obtained from the pressure signal in monitoring points. The main application of POD is to describe which modes are related to an interaction between rotor (turbine runner) and stator (spiral casing and guide vanes) and cause dynamic flow behavior in the draft tube. The numerically computed efficiency is correlated with the experimental one in order to verify the simulation accuracy

  11. An Evaluation of a Phase-Lag Boundary Condition for Francis Hydroturbine Simulations Using a Pressure-Based Solver

    Wouden, Alex; Cimbala, John; Lewis, Bryan

    2014-11-01

    While the periodic boundary condition is useful for handling rotational symmetry in many axisymmetric geometries, its application fails for analysis of rotor-stator interaction (RSI) in multi-stage turbomachinery flow. The inadequacy arises from the underlying geometry where the blade counts per row differ, since the blade counts are crafted to deter the destructive harmonic forces of synchronous blade passing. Therefore, to achieve the computational advantage of modeling a single blade passage per row while preserving the integrity of the RSI, a phase-lag boundary condition is adapted to OpenFOAM® software's incompressible pressure-based solver. The phase-lag construct is accomplished through restating the implicit periodic boundary condition as a constant boundary condition that is updated at each time step with phase-shifted data from the coupled cells adjacent to the boundary. Its effectiveness is demonstrated using a typical Francis hydroturbine modeled as single- and double-passages with phase-lag boundary conditions. The evaluation of the phase-lag condition is based on the correspondence of the overall computational performance and the calculated flow parameters of the phase-lag simulations with those of a baseline full-wheel simulation. Funded in part by DOE Award Number: DE-EE0002667.

  12. On the Flow Instabilities and Turbulent Kinetic Energy of Large-Scale Francis Hydroturbine Model at Low Flow Rate Conditions

    Wen-Tao Su

    2014-07-01

    Full Text Available This paper is to make a better understanding of the flow instabilities and turbulent kinetic energy (TKE features in a large-scale Francis hydroturbine model. The flow instability with aspect of pressure oscillation and pressure-velocity correlation was investigated using large eddy simulation (LES method along with two-phase cavitation model. The numerical simulation procedures were validated by the existing experimental result, and further the TKE evolution was analyzed in a curvilinear coordinates. By monitoring the fluctuating pressure and velocities in the vanes’ wake region, the local pressure and velocity variations were proven to have a phase difference approaching π/2, with a reasonable cross-correlation coefficient. Also the simultaneous evolution of pressure fluctuations at the opposite locations possessed a clear phase difference of π, indicating the stresses variations on the runner induced by pressure oscillation were in an odd number of nodal diameter. Considering the TKE generation, the streamwise velocity component us′2 contributed the most to the TKE, and thus the normal stress production term and shear stress production term imparted more instability to the flow than other production terms.

  13. Les livres de recettes « francisés » au Mexique au XIXe siècle

    Sarah Bak-Geller Corona

    2008-05-01

    Full Text Available L’apparition des premiers livres de cuisine au Mexique - publiés par des maisons d’édition françaises spécialisées en ouvrages en espagnol - marque le début de l’histoire de la cuisine mexicaine. Cet événement s’inscrit par ailleurs dans une histoire plus large : celle de la construction de l’État-nation, entre nationalisme et cosmopolitisme. L’article s’intéresse aux idéaux de nation et de cuisine cohabitant dans deux des livres de recettes francisés du XIXe siècle au Mexique : l’Arte novísimo de cocina et le Nuevo cocinero americano/mexicano en forma de diccionario.French-fashioned Mexican recipe books in the 19th century. Globalization and construction of a national culinary modelThe first Mexican recipe books were published in the early 1830’s by French publishing houses specialized in Spanish written books. This article deals with the different nationalistic and cuisine models in two French-fashioned Mexican recipe books -the Arte novísimo de cocina and the Nuevo cocinero americano/mexicano en forma de diccionario- and their relationship with the nation-building context in nineteenth century Mexico.

  14. Cavitation on a scaled-down model of a Francis turbine guide vane: high-speed imaging and PIV measurements

    Pervunin, K. S.; Timoshevskiy, M. V.; Churkin, S. A.; Kravtsova, A. Yu; Markovich, D. M.; Hanjalić, K.

    2015-12-01

    Cavitation on two symmetric foils, a NACA0015 hydrofoil and a scaled-down model of a Francis turbine guide vane (GV), was investigated by high-speed visualization and PIV. At small attack angles the differences between the profiles of the mean and fluctuating velocities for both hydrofoils were shown to be insignificant. However, at the higher angle of incidence, flow separation from the GV surface was discovered for quasi-steady regimes including cavitation-free and cavitation inception cases. The flow separation leads to the appearance of a second maximum in velocity fluctuations distributions downstream far from the GV surface. When the transition to unsteady regimes occurred, the velocity distributions became quite similar for both foils. Additionally, for the GV an unsteady regime characterized by asymmetric spanwise variations of the sheet cavity length along with alternating periodic detachments of clouds between the sidewalls of the test channel was for the first time visualized. This asymmetric behaviour is very likely to be governed by the cross instability that was recently described by Decaix and Goncalvès [8]. Moreover, it was concluded that the existence of the cross instability is independent on the test body shape and its aspect ratio.

  15. Experimental evidence of inter-blade cavitation vortex development in Francis turbines at deep part load condition

    Yamamoto, K.; Müller, A.; Favrel, A.; Avellan, F.

    2017-10-01

    Francis turbines are subject to various types of cavitation flow depending on the operating condition. To enable a smooth integration of the renewable energy sources, hydraulic machines are now increasingly required to extend their operating range, especially down to extremely low discharge conditions called deep part load operation. The inter-blade cavitation vortex is a typical cavitation phenomenon observed at deep part load operation. However, its dynamic characteristics are insufficiently understood today. In an objective of revealing its characteristics, the present study introduces a novel visualization technique with instrumented guide vanes embedding the visualization devices, providing unprecedented views on the inter-blade cavitation vortex. The binary image processing technique enables the successful evaluation of the inter-blade cavitation vortex in the images. As a result, it is shown that the probability of the inter-blade cavitation development is significantly high close to the runner hub. Furthermore, the mean vortex line is calculated and the vortex region is estimated in the three-dimensional domain for the comparison with numerical simulation results. In addition, the on-board pressure measurements on a runner blade is conducted, and the influence of the inter-blade vortex on the pressure field is investigated. The analysis suggests that the presence of the inter-blade vortex can magnify the amplitude of pressure fluctuations especially on the blade suction side. Furthermore, the wall pressure difference between pressure and suction sides of the blade features partially low or negative values near the hub at the discharge region where the inter-blade vortex develops. This negative pressure difference on the blade wall suggests the development of a backflow region caused by the flow separation near the hub, which is closely related to the development of the inter-blade vortex. The development of the backflow region is confirmed by the numerical

  16. Of the Helmholtz Club, South-Californian seedbed for visual and cognitive neuroscience, and its patron Francis Crick.

    Aicardi, Christine

    2014-03-01

    Taking up the view that semi-institutional gatherings such as clubs, societies, research schools, have been instrumental in creating sheltered spaces from which many a 20th-century project-driven interdisciplinary research programme could develop and become established within the institutions of science, the paper explores the history of one such gathering from its inception in the early 1980s into the 2000s, the Helmholtz Club, which brought together scientists from such various research fields as neuroanatomy, neurophysiology, psychophysics, computer science and engineering, who all had an interest in the study of the visual system and of higher cognitive functions relying on visual perception such as visual consciousness. It argues that British molecular biologist turned South Californian neuroscientist Francis Crick had an early and lasting influence over the Helmholtz Club of which he was a founding pillar, and that from its inception, the club served as a constitutive element in his long-term plans for a neuroscience of vision and of cognition. Further, it argues that in this role, the Helmholtz Club served many purposes, the primary of which was to be a social forum for interdisciplinary discussion, where 'discussion' was not mere talk but was imbued with an epistemic value and as such, carefully cultivated. Finally, it questions what counts as 'doing science' and in turn, definitions of success and failure-and provides some material evidence towards re-appraising the successfulness of Crick's contribution to the neurosciences. Copyright © 2013 The Author. Published by Elsevier Ltd.. All rights reserved.

  17. SCAN TO BIM FOR 3D RECONSTRUCTION OF THE PAPAL BASILICA OF SAINT FRANCIS IN ASSISI IN ITALY

    M. G. Angelini

    2017-05-01

    Full Text Available The historical building heritage, present in the most of Italian cities centres, is, as part of the construction sector, a working potential, but unfortunately it requires planning of more complex and problematic interventions. However, policies to support on the existing interventions, together with a growing sensitivity for the recovery of assets, determine the need to implement specific studies and to analyse the specific problems of each site. The purpose of this paper is to illustrate the methodology and the results obtained from integrated laser scanning activity in order to have precious architectural information useful not only from the cultural heritage point of view but also to construct more operative and powerful tools, such as BIM (Building Information Modelling aimed to the management of this cultural heritage. The Papal Basilica and the Sacred Convent of Saint Francis in Assisi in Italy are, in fact, characterized by unique and complex peculiarities, which require a detailed knowledge of the sites themselves to ensure visitor’s security and safety. For such a project, we have to take in account all the people and personnel normally present in the site, visitors with disabilities and finally the needs for cultural heritage preservation and protection. This aim can be reached using integrated systems and new technologies, such as Internet of Everything (IoE, capable of connecting people, things (smart sensors, devices and actuators; mobile terminals; wearable devices; etc., data/information/knowledge and processes to reach the desired goals. The IoE system must implement and support an Integrated Multidisciplinary Model for Security and Safety Management (IMMSSM for the specific context, using a multidisciplinary approach.

  18. Scan to Bim for 3d Reconstruction of the Papal Basilica of Saint Francis in Assisi in Italy

    Angelini, M. G.; Baiocchi, V.; Costantino, D.; Garzia, F.

    2017-05-01

    The historical building heritage, present in the most of Italian cities centres, is, as part of the construction sector, a working potential, but unfortunately it requires planning of more complex and problematic interventions. However, policies to support on the existing interventions, together with a growing sensitivity for the recovery of assets, determine the need to implement specific studies and to analyse the specific problems of each site. The purpose of this paper is to illustrate the methodology and the results obtained from integrated laser scanning activity in order to have precious architectural information useful not only from the cultural heritage point of view but also to construct more operative and powerful tools, such as BIM (Building Information Modelling) aimed to the management of this cultural heritage. The Papal Basilica and the Sacred Convent of Saint Francis in Assisi in Italy are, in fact, characterized by unique and complex peculiarities, which require a detailed knowledge of the sites themselves to ensure visitor's security and safety. For such a project, we have to take in account all the people and personnel normally present in the site, visitors with disabilities and finally the needs for cultural heritage preservation and protection. This aim can be reached using integrated systems and new technologies, such as Internet of Everything (IoE), capable of connecting people, things (smart sensors, devices and actuators; mobile terminals; wearable devices; etc.), data/information/knowledge and processes to reach the desired goals. The IoE system must implement and support an Integrated Multidisciplinary Model for Security and Safety Management (IMMSSM) for the specific context, using a multidisciplinary approach.

  19. Hydro-acoustic resonance behavior in presence of a precessing vortex rope: observation of a lock-in phenomenon at part load Francis turbine operation

    Favrel, A; Landry, C; Müller, A; Yamamoto, K; Avellan, F

    2014-01-01

    Francis turbines operating at part load condition experience the development of a cavitating helical vortex rope in the draft tube cone at the runner outlet. The precession movement of this vortex rope induces local convective pressure fluctuations and a synchronous pressure pulsation acting as a forced excitation for the hydraulic system, propagating in the entire system. In the draft tube, synchronous pressure fluctuations with a frequency different to the precession frequency may also be observed in presence of cavitation. In the case of a matching between the precession frequency and the synchronous surge frequency, hydro-acoustic resonance occurs in the draft tube inducing high pressure fluctuations throughout the entire hydraulic system, causing torque and power pulsations. The risk of such resonances limits the possible extension of the Francis turbine operating range. A more precise knowledge of the phenomenon occurring at such resonance conditions and prediction capabilities of the induced pressure pulsations needs therefore to be developed. This paper proposes a detailed study of the occurrence of hydro-acoustic resonance for one particular part load operating point featuring a well-developed precessing vortex rope and corresponding to 64% of the BEP. It focuses particularly on the evolution of the local interaction between the pressure fluctuations at the precession frequency and the synchronous surge mode passing through the resonance condition. For this purpose, an experimental investigation is performed on a reduced scale model of a Francis turbine, including pressure fluctuation measurements in the draft tube and in the upstream piping system. Changing the pressure level in the draft tube, resonance occurrences are highlighted for different Froude numbers. The evolution of the hydro-acoustic response of the system suggests that a lock-in effect between the excitation frequency and the natural frequency may occur at low Froude number, inducing a hydro

  20. Re-diseño de la línea de ejes de turbinas Francis de salto elevado para la mejora de su competitividad

    GARCÍA MÓNACO, ALEJANDRO

    2015-01-01

    El objetivo de este proyecto es mejorar la línea de ejes de las turbinas Francis de eje horizontal. En especial, se ha trabajado con aquellas máquinas diseñadas para funcionar con saltos de agua elevados. El proyecto surge del conocimiento de importantes ventajas económicas de las turbinas horizontales frente a las verticales y de la voluntad por parte de ALSTOM HYDRO de mejorar los rendimientos de las primeras para hacerlas más competitivas. Los capítulos 3 y 4 son introductorios a la pro...

  1. Espíritos cheios de bichos: A fauna nas viagens de Louis Agassiz e Richard Francis Burton pelo Brasil oitocentista

    Janaina Zito Losada

    2015-04-01

    Full Text Available O Brasil do século XIX foi alvo de inúmeras viagens realizadas por cientistas estrangeiros. O objetivo deste artigo é analisar as impressões sobre a fauna brasileira presentes nos relatos das viagens realizadas pelo naturalista suíço Louis Agassiz, em 1865, e pelo explorador inglês Richard Francis Burton, em 1868. Destes relatos privilegiam-se as descrições do meio natural de diferentes regiões brasileiras e das particularidades da fauna silvestre por eles encontrada.

  2. okoronkwo, ike francis

    Valued Acer Customer

    chain of events. Among these is a mass participation of people into an emerging global culture ... the enormous fluidities of location and identity, are the imperatives of existence of our age. .... searched for a plastic reality a year later and this became the beginning of sourcing imagery from electronic ..... Superpower in Africa.

  3. Making and Selling the “Rock Star Pope”: The Celebritization of Pope Francis during His Five-Day Visit to the Philippines

    Gerry M. Lanuza

    2017-12-01

    Full Text Available This paper is an attempt to provide an analysis of the celebritization and celebrification of Pope Francis when he visited the Philippines from January 15 to 19, 2015. Employing the analytic concept of “culture industry” developed by the members of the Frankfurt School, and combining it with the current analyses in existing celebrity study under late capitalism, this paper will show how the local giant media corporations, namely, GMA and ABS-CBN, staged a grand “media event” that nationally mediatized and publicly magnified the celebrity status of the so-called “rock star Pope.” The current study contributes to the growing literature on celebrity study by focusing on the popular and charismatic religious leader of 1.2 billion Catholics worldwide. Toward the end of this paper, consistent with the critical slant of the Frankfurt School’s critique of mass deception, it is argued that the celebrity culture that created the “spectacle” of Pope Francis must be distinguished from his prophetic message. And this must be explored in future studies.

  4. Experimental investigation of the sloshing motion of the water free surface in the draft tube of a Francis turbine operating in synchronous condenser mode

    Vagnoni, Elena; Favrel, Arthur; Andolfatto, Loïc; Avellan, François

    2018-06-01

    Hydropower units may be required to operate in condenser mode to supply reactive power. In this operating mode, the water level in the turbine or pump-turbine is decreased below the runner by closing the guide vanes and injecting pressurized air. While operating in condenser mode the machine experiences power losses due to several air-water interaction phenomena which cause air losses. One of such phenomena is the sloshing motion of the water free surface below the runner in the draft tube cone of a Francis turbine. The objective of the present work is to experimentally investigate the sloshing motion of the water free surface in the draft tube cone of a reduced scale physical model of a Francis turbine operating in condenser mode. Images acquisition and simultaneous pressure fluctuation measurements are performed and an image processing method is developed to investigate amplitude and frequency of the sloshing motion of the free surface. It is found that this motion is excited at the natural frequency of the water volume and corresponds to the azimuthal wavenumber m = 1 of a rotating gravity wave. The amplitude of the motion is perturbed by wave breaking and it decreases by increasing the densimetric Froude number. The sloshing frequency slightly increases with respect to the natural frequency of the water volume by increasing the densimetric Froude number. Moreover, it results that this resonant phenomenon is not related to the torque perturbation.

  5. Juan H. Vera and Grazyna Wilczek-Vera: Classical Thermodynamics of Fluid Systems: Principles and Applications. CRC Press, Taylor & Francis Group

    Kontogeorgis, Georgios

    2017-01-01

    The book Classical Thermodynamics of Fluid Systems: Principles and Applications written by professor Juan H. Vera and Dr. Grazyna Wilczek-Vera is undoubtably a book written in a most personal style by the two distinguished authors.The book contains four sections and a fifth one with appendices...

  6. Miosite e rabdomiólise na doença mão-pé-boca na infância Myositis and rhabdomyolysis in hand-foot-mouth disease in childhood

    Maria Helena Vaisbich

    2010-03-01

    Full Text Available OBJETIVO: Relatar um caso de doença mão-pé-boca complicada por miosite, rabdomiólise e hepatite, interessante por ser a doença frequente em crianças e poder apresentar complicações graves, apesar de raras. DESCRIÇÃO DO CASO: Paciente de três anos de idade, sexo feminino, com história de febre por três dias, seguida pelo aparecimento de lesões ulceradas em mucosa oral e mialgia intensa. Após três dias, voltou a apresentar febre por mais dois dias (febre bifásica. Nesses dois dias, apresentou lesões eritematosas pelo corpo, principalmente nos pés, mãos e face, e procurou atendimento médico. Evoluiu com aumento de enzimas musculares e hepáticas (CPK com valor máximo de 345.007U/L, TGO 2041U/L, TGP 1589U/L, gama-GT 94U/L e aumento transitório da creatinina sérica, com clearance de creatinina estimado pela estatura de 73mL/minuto/1,73m2 de superfície corporal. Houve melhora progressiva, com hidratação vigorosa e alcalinização da urina, sem necessidade de diálise. COMENTÁRIOS: Trata-se de uma criança com doença mão-pé-boca, com miosite, rabdomiólise e hepatite. São enfatizados os critérios clínicos laboratoriais para o diagnóstico e a importância da monitorização das complicações da doençaOBJECTIVE: To report a hand-foot-mouth disease case, complicated by myositis, rhabdomyolisis and hepatitis, since this is a common disease in children and can result in rare but severe complications. CASE DESCRIPTION: A three-year-old girl with fever for three days, followed by the appearance of ulcerative lesions in the oral mucosa and severe muscular pain; after three days, she presented fever for two more days. At the same time, she had widespread erythematosus rash, especially in her hands, feet and face. She presented high levels of muscular and hepatic enzymes (maximum value of CPK 345.007IU/L, AST 2041IU/L, ALT 1589IU/L, GT 94IU/L, and transitory increase in serum creatinine (maximum value of 0.73mg/dL, creatinine

  7. Percepción de la comunidad del archipiélago de Bocas del Toro, Panamá, sobre el impacto de la industria turística

    Mercedes Camargo Velandia

    2016-12-01

    Full Text Available Desarrollar políticas públicas que impulsen el turismo y respondan al cambio climático exige el análisis de múltiples variables sociales, económicas y ambientales. En el contexto de la gestión de las zonas aisladas físicamente, como los archipiélagos, dicho análisis depende de conocer las características ambientales y las necesidades socioeconómicas de las comunidades locales que permitan reconocer las percepciones de los individuos. Este trabajo se centra en este aspecto social y se interesa en conocer la percepción de la comunidad sobre los impactos socioeconómicos y ambientales que ha experimentado en los últimos años como consecuencia del turismo que se está desarrollando en el archipiélago de Bocas del Toro. En la investigación se realizaron 200 entrevistas durante 2013 en cuatro islas del archipiélago de Bocas que desarrollan actividades turísticas. Los resultados del estudio permiten caracterizar a la comunidad y conocer su percepción teniendo en cuenta que desarrollan actividades estrechamente ligadas al turismo y que este se desarrolla en un escenario altamente desregularizado, donde hay una débil capacidad de control y seguimiento por parte del Estado, lo que ha impulsado un proceso desordenado de construcción y ocupación del territorio. Se concluye que la percepción de la comunidad local se encuentra dividida marginalmente a favor del desarrollo de la industria turística por una mayor conciencia de los costos y beneficios que el turismo ha traído. Sin embargo, las voces de euforia inicial con la venta de casas y terrenos a extranjeros realizada en los años noventa han cedido espacio a una visión más crítica y más social. Los aspectos más positivos del desarrollo de la industria del turismo en este lugar son su aporte en el dinamismo de la economía local –en comparación con la situación de 1983– y la mejora en la infraestructura, que han resultado atractivos para que personas de otros lugares

  8. Cymothoa recifea sp. nov. (Isopoda, Cymothoidae from the mouths of marine fishes of Pernambuco State, Brazil Cymothoa recifea sp. nov. (Isopoda, Cymothoidae das bocas de peixes marinhos do Estado de Pernambuco, Brasil

    Vernon E. Thatcher

    2005-09-01

    Full Text Available Cymothoa recifea sp. nov. (Isopoda, Cymothoidae is described from the mouths of Centropomus undecimalis (Bloch, 1792 and Oligoplites palometa (Cuvier, 1832. The fish hosts were caught near Itamaracá and Cabo de Santo Agostinho, State of Pernambuco, Brazil. The new species bears a superficial resemblance to Cymothoa oestrum (Linnaeus, 1793 from which it differs in a number of important respects. In the new species, the basal carinae are large on pereopods 4-7 and usually pointed, whereas in C. oestrum the carinae are small on pereopods 4-6, large on 7 and not pointed. In the new species, only pleopod 1 is simple and 2-5 are provided with pockets and folds. In the other species, pleopods 1-4 are simple and only 5 has folds.Cymothoa recifea sp. nov. (Isopoda, Cymothoidae é descrito das bocas de Centropomus undecimalis (Bloch, 1792 e Oligoplites palometa (Cuvier, 1832. Os peixes foram capturados perto de Itamaracá, Estado de Pernambuco, Brasil. A nova espécie apresenta uma semelhança superficial à Cymothoa oestrum (Linnaeus, 1793 da qual distingue-se pôr várias características. Na nova espécie, as expansões nas bases dos pereópodos ("carinae" são grandes nos 4-7 e, geralmente, terminam em pontas agudas. Em contraste, em C. oestrum, estas estruturas são pequenas nos pereópodos 4-6, grande somente no sétimo e não têm pontas agudas. Na nova espécie, somente o pleópodo 1 é simples e 2-5 apresentam bolsas e dobras. Na outra espécie, os pleópodos 1-4 são simples e somente 5 tem dobras.

  9. Espacios exclusivos y excluyentes: ¿Cómo y quién habita el espacio público? El Boulevard Naciones Unidas (Quito y La Boca (Ciudad de Buenos Aires.

    Kathrin Hopfgartner

    2014-12-01

    Full Text Available Desde finales del siglo XX, gobiernos locales de diferentes ciudades de América Latina implementan políticas urbanas de corte neoliberal. El objetivo es re-configurar ciudades económicamente productivas. Para ello, se busca el mejoramiento del factor de localización de estas a través de la atracción de visitantes e inversionistas. Con ello, se da el paso de una lógica de gobernanza urbano gerencial a “la ciudad empresarial”. Una de las implicaciones más significativas es el carácter selectivo que toman los espacios públicos. Concretamente, se los convierte en nuevas centralidades orientadas, fundamentalmente, al consumo de sectores de altos ingresos. Esto deriva en una producción del espacio público, que profundiza la polarización socio-económica y la configuración de ciudades fragmentadas y desiguales. Sin embargo, la producción de un determinado espacio se realiza tanto desde las políticas urbanas, como desde los actores del lugar. En este sentido, el espacio público es uno de los lugares en los cuales se materializa la tensión entre estas dos escalas. Tensión que se deriva a partir de la disputa por quien instalará los parámetros de cómo y quién podrá habitar y consumir el espacio público. En esta línea, el presente trabajo analiza la producción de espacios públicos en dos casos de estudios latinoamericanos: la construcción del Boulevard Naciones Unidas, en la ciudad de Quito, y la renovación urbana del barrio La Boca, en la Ciudad de Buenos Aires.

  10. Incidence of second primary oral cancer tumors: a retrospective study = Incidência de segundos tumores primários de câncer de boca: um estudo retrospectivo

    Sassi, Laurindo Moacir

    2010-01-01

    Full Text Available Objetivo: A maioria das neoplasias malignas de cabeça e pescoço é diagnosticada em estágios avançados. O alto risco de desenvolver um segundo tumor primário (STP diminui a taxa de sobrevida dos pacientes. STP piora significativamente o prognóstico e estudos sobre ele devem ser realizados para se descobrir seus fatores de risco e melhor forma de tratamento. O principal objetivo deste estudo foi analisar a ocorrência de STP em pacientes com carcinoma epidermóide bucal (CEB tratados no Hospital Erasto Gaertner (HEG, Curitiba, PRP, Brasil, num período de 16 anos. Metodologia: Um estudo retrospectivo foi realizado a fim de revisar os pacientes com CEB que desenvolveram STP entre Janeiro de 1990 e Dezembro de 2005. Os dados demográficos e clínicos foram coletados através dos prontuários médicos dos pacientes e foram analisados por estatística descritiva. Resultados: Neste período, 34. 637 pacientes foram admitidos no HEG. Um total de 1637 (4,4% pacientes recebeu diagnóstico de CEB, dos quais 37 (2,7% desenvolveram STP. Os pacientes que desenvolveram STP eram 29 (78,4% homens e 8 (21,6% mulheres, com média de idade de 58 anos. Os sítios anatômicos mais frequentes para o STP foram a boca, orofaringe e esôfago; a taxa de sobrevivência foi de 27%. Conclusão: Pacientes tratados de CEB devem ser examinados cuidadosamente e monitorados regularmente por causa do alto risco de desenvolver um STP, especialmente aqueles que mantêm os hábitos de tabagismo e etilismo

  11. Human radiation studies: Remembering the early years: Oral history of cell biologist Don Francis Petersen, Ph.D., conducted November 29, 1994

    1995-08-01

    This report is a transcript of an interview of Dr. Don Francis Petersen by representatives of the US DOE Office of Human Radiation Experiments. Dr. Petersen was selected for this interview because of his long research career at Los Alamos and his knowledge of the Atomic Energy Commission's biomedical program. Dr. Petersen did not personally conduct research on human subjects. After a brief biographical sketch Dr. Petersen discusses his remembrances of the early use of radionuclides as biological tracers, aspects of nuclear weapons testing in the 1940's and 1950's including fallout studies, the means by which research projects were approved, use of humans in the whole-body counter, and the Health Division Biomedical responsibilities

  12. 3D fluid-structure modelling and vibration analysis for fault diagnosis of Francis turbine using multiple ANN and multiple ANFIS

    Saeed, R. A.; Galybin, A. N.; Popov, V.

    2013-01-01

    This paper discusses condition monitoring and fault diagnosis in Francis turbine based on integration of numerical modelling with several different artificial intelligence (AI) techniques. In this study, a numerical approach for fluid-structure (turbine runner) analysis is presented. The results of numerical analysis provide frequency response functions (FRFs) data sets along x-, y- and z-directions under different operating load and different position and size of faults in the structure. To extract features and reduce the dimensionality of the obtained FRF data, the principal component analysis (PCA) has been applied. Subsequently, the extracted features are formulated and fed into multiple artificial neural networks (ANN) and multiple adaptive neuro-fuzzy inference systems (ANFIS) in order to identify the size and position of the damage in the runner and estimate the turbine operating conditions. The results demonstrated the effectiveness of this approach and provide satisfactory accuracy even when the input data are corrupted with certain level of noise.

  13. Validation of mathematical models for predicting the swirling flow and the vortex rope in a Francis turbine operated at partial discharge

    Kuibin, P.A.; Okulov, Valery; Susan-Resiga, R.F.

    2010-01-01

    recover all this information without actually computing the full three-dimensional unsteady flow in the hydraulic turbine. As a result, we provide valuable mathematical tools for assessing the turbine behaviour at off-design operating regimes in the early stages of runner design, with computational effort......The vortex rope in a hydro turbine draft tube is one the main and strong sources of pulsations in non-optimal modes of hydro turbine operation. We examine the case of a Francis turbine model operated at partial discharge, where a strong precessing vortex rope is developed in the discharge cone...... several orders of magnitude less than the current approaches of simulating the complex turbine flow....

  14. The Language of Colours. A Semiotic Analysis of Colours and Symbolic Imagery in Francis Ford Coppola’s "Bram Stoker’s Dracula" (1992

    Veronika Bernard

    2011-10-01

    Full Text Available Reviews referring to Francis Ford Coppola’s Columbia Pictures Bram Stoker’s Dracula classic of 1992 recurrently mention the images owing to the camera work of Michael Ballhaus as the striking feature of the movie and highly praise them for their thematically coherent effect.. The colours, if mentioned at all, leave reviewers undecided to sceptical when it comes to evaluating their contribution to the overall composition of the film, though. By providing a semiotic analysis of colours and symbolic imagery the below article will show how colours and imagery in their inter-relatedness create coherence and cohesion with Coppola’s interpretation of Stoker’s Dracula as a religiously inspired morality play set in the context of Victorian cultural values and self-perception.

  15. Human radiation studies: Remembering the early years: Oral history of cell biologist Don Francis Petersen, Ph.D., conducted November 29, 1994

    NONE

    1995-08-01

    This report is a transcript of an interview of Dr. Don Francis Petersen by representatives of the US DOE Office of Human Radiation Experiments. Dr. Petersen was selected for this interview because of his long research career at Los Alamos and his knowledge of the Atomic Energy Commission`s biomedical program. Dr. Petersen did not personally conduct research on human subjects. After a brief biographical sketch Dr. Petersen discusses his remembrances of the early use of radionuclides as biological tracers, aspects of nuclear weapons testing in the 1940`s and 1950`s including fallout studies, the means by which research projects were approved, use of humans in the whole-body counter, and the Health Division Biomedical responsibilities.

  16. Richard Francis Burton e a inserÃÃo do kama-sutras como um manual sexual entre os vitorianos (Inglaterra, 1883)

    Felipe Salvador Weissheimer

    2014-01-01

    Dentre os vÃrios âKama-sutrasâ difundidos no mercado, a versÃo clÃssica foi escrita por Vatsyayana (sÃculo I-IV, aproximadamente) e publicada na Inglaterra em 1883 pela Sociedade Hindu Kama-Shastra. Richard Francis Burton foi o membro de maior importÃncia na Sociedade Hindu Kama-Shastra, pois, alÃm de fomentar a publicaÃÃo, auxiliou na traduÃÃo, editou e enunciou vÃrios comentÃrios ao longo da obra. Em seus comentÃrios, percebemos que o projeto da traduÃÃo e publicaÃÃo do Kama-sutras visava e...

  17. Los usos políticos del cuerpo: los dos cuerpos del rey en la filosofía política de Francis Bacon

    Silvia Manzo

    2008-01-01

    Full Text Available Como figure destacada en el complejo escenario político de la transición entre la dinastía Tudor y la dinastía Estuardo de Inglaterra, Francis Bacon (1561-1626 adoptó la teoría de los dos cuerpos del rey en sus textos políticos y jurídicos. Su uso de esta teoría tiene una estrecha conexión con conceptos centrales de su filosofía natural que testimonia la profunda conexión que Bacon encuentra entre la política y la naturaleza. En este trabajo, analizaré su utilización de la teoría medieval de los dos cuerpos del rey y la vinculación que esta tiene con el resto de la filosofía baconiana. Tomaré como eje para el análisis su discurso sobre la naturalización de los escoceses nacidos después de la subida al trono de James I, donde Bacon trata el concepto de los dos cuerpos del rey con más profundidad.As a prominent intellectual figure in the complex political arena of England, during the transition from Tudor to Stuart dinasties, Francis Bacon (1561-1626 assumes the medieval King's two bodies theory in his political and juridical writings. His use of this theory is extremely linked to central concepts of his natural philosphy, which testifies to the deep connection that Bacon finds between politics and nature. This paper addresses Bacon's use of the King's two bodies theory and its link to the rest of the Baconian philosophy. The focus of this study will be his discourse on the naturalization of Scots born after James I assumption of power, where Bacon deals more deeply with the King's two bodies theory.

  18. Estudio de la incidencia de un programa de recreación laboral en estrés de los trabajadores de la Empresa Boca Misty Flowers en el primer semestre del año 2012. Propuesta alternativa de un programa de recreación

    Sangolqui Graziani, Naori Jennifer

    2013-01-01

    La presente investigación es de carácter cuantitativa, correlacional y cuasi-experimental, que consiste en la aplicación de un programa de recreación laboral, el cual fue programado con el debido diagnóstico previo para analizar aspectos referentes al uso del tiempo libre y de las preferencias con respectos a las actividades predilectas por los trabajadores de la empresa Boca Misty Flowers, población a ser investigada. Este programa se aplicó con el objetivo de comprobar si la recreación la...

  19. Illustrated manual of pediatric dermatology: diagnosis and management

    Bree, Alanna; Mallory, Susan B; Chern, Peggy

    2005-01-01

    ... Page iv © 2005 Taylor & Francis, an imprint of the Taylor & Francis Group First published in the United Kingdom in 2005 by Taylor & Francis, an imprint of the Taylor & Francis Group, 2 Park Squa...

  20. Arrecifes coralinos de Bocas del Toro, Panamá: distribución, estructura y estado de conservación de los arrecifes continentales de la Laguna de Chiriquí y la Bahía Almirante

    Héctor M. Guzmán

    1998-09-01

    Full Text Available Se presenta la distribución de azrecifes coralinos a lo lar-go de la costa continental (tierra firrne de la Bahía Almirante (ca. 83km y de la Laguna de Chiñquí (ca 125km, Pro­vincia de Bocas del Toro, Panarná Se describe la estructura de 15 arrecifes coralinos, los cuales representan la diversidad de condiciones hidrológicas y orográficas de la zona costera con mayor inítuencia terrígena de Bocas del Toro. Los arrecifes encontrados en la Bahía Almirante se encuentran bien desarrollados hasta una profundidad máxima de 23 m y una diversidad de corales madrepóricos de 33 especies, locual representa aproximadamente un 53 % de la diversidad conocida para Panamá. las coberturas de coral vivo observadas para la región de estudio oscilan entre 20 % y 50 % depediendo de la profundidady se estima un promedio total de 35 % casi el doble de la cobertura informada para otras regiones de Panamá (San Blas donde se presume que los arrecifes estan mejor protegidos. La zonación y composición de especies de corales son similares en toda el área de estudio; Porites furcata domina los arrecifes someros hasta 2 m de profundidad, con una cobertura de ca. 90% seguida por una zona dominada por Agaricia tenuifolia, (40% hasta los 6 m. seguido de una zona principalmente compuesta de A. tenuifolia (15% Madracis mirabilis (7% y Siderastrea siderea (50% hasta los 15 m de profundidad, terminando en una zona profundad dominada por algas rojas calcareas Amphiroa rigida, Hydrolithon boergesenii, Sporolithon episporum y el coral S. siderea. El coral Agaricia undata, común en habitats profundos se encontró relativamente abundante (3% y creciendo después de los 10 m. Se informa por primera vez para la región la existencia de una barrera coralina construida por Porites furcata, semi-continua de ca. 22 km de largo y que bordea la zona costera de la Bahía Almirante. El grupo de las esponjas, segundo en importancia, está ampliamente distribuido en todos los

  1. Effect of enamel matrix proteins on the treatment of intrabony defects: a split-mouth randomized controlled trial study O efeito da proteína da matriz do esmalte no tratamento de defeitos infra-ósseos: um estudo clínico controlado randomizado boca-dividida

    Daniela Chambrone

    2007-09-01

    Full Text Available The objective of this split-mouth, double-blind, randomized controlled trial was to compare the clinical effect of treatment of 2- or 3-wall intrabony defects with open flap debridement (OFD combined or not with enamel matrix proteins (EMP. Thirteen volunteers were selected with one pair of or more intrabony defects and probing pocket depth (PPD > 5 mm. All individuals received instructions regarding oral hygiene and were submitted to scaling and root planing. Each participant received the two treatment modalities: test sites were treated with OFD and EMP, and control sites received only OFD. After 6 months, a significant reduction was observed in PPD for the EMP group (from 6.42 ± 1.08 mm to 2.67 ± 1.15 mm and for the OFD group (from 6.08 ± 1.00 mm to 2.00 ± 0.95 mm (p O objetivo deste estudo clínico controlado, randomizado, duplo-cego, tipo boca-dividida foi comparar o efeito clínico do tratamento de defeitos infra-ósseos de 2 ou 3 paredes com retalho de espessura total (RET associado ou não com a proteína da matriz do esmalte (PME. Treze voluntários com 1 par ou mais de defeitos infra-ósseos foram selecionados com profundidade clínica de sondagem (PCS > 5 mm. Todos receberam instruções de higiene bucal, raspagem e alisamento radicular. Cada participante recebeu os dois tipos de tratamento: o lado teste foi tratado com RET e PME, e o lado controle recebeu somente RET. Após 6 meses, foi observada uma redução significante na PCS para o grupo PME (de 6,42 ± 1,08 mm para 2,67 ± 1,15 mm e para o grupo RET (de 6,08 ± 1,00 mm para 2,00 ± 0,95 mm (p < 0,0001, mas não houve diferença significante entre os grupos (p = 0,13. Um ganho significante de nível clínico de inserção relativo (NCIR foi observado em ambos os grupos (PME: de 13,42 ± 1,88 mm para 10,75 ± 2,26 mm, p < 0,001; RET: de 12,42 ± 1,98 mm para 10,58 ± 2,23 mm, p = 0,013, mas não houve diferença significante entre os grupos (p = 0,85. A retração gengival

  2. Study of the use of a micro hydro in knockdown container completed with a cylindrical form housing of francis hydraulic turbine to support the development program of energy self-sustainability for remote and isolated areas in Indonesia

    Kamal Samsul

    2017-01-01

    It shows that the implementation of the unit in a remote area has reduced the total site construction time by 1/3 compared to the predicted one with conventional unit. The performance of the Francis turbine with cylindrical form housing has shown comparable with the conventional one which has volute form housing. The superiority was even more pronounced by introducing a deflection insert in its input flow channel. The insertion was capable to create more distributed flow into the runner. Efficiency of the turbine up to 80% was performed in this research. Local manufacture for turbine usually use many craft work and welding to built a volute form housing for the Francis turbine. The cylindrical form housing here has also proven significantly in reducing the time and price for the turbine manufacturing process.

  3. Toward an epistemology of nano-technosciences: Probing technoscience from a historical perspective: on today's surprising prevalence and relevance of Francis Bacon.

    Schmidt, Jan C

    2011-12-01

    This paper aims to contribute to the attempts to clarify and classify the vague notion of "technosciences" from a historical perspective. A key question that is raised is as follows: Does Francis Bacon, one of the founding fathers of the modern age, provide a hitherto largely undiscovered programmatic position, which might facilitate a more profound understanding of technosciences? The paper argues that nearly everything we need today for an ontologically well-informed epistemology of technoscience can be found in the works of Bacon-this position will be called epistemological real-constructivism. Rather than realist or constructivist, empiricist or rationalist, Bacon's position can best be understood as real-constructivist since it challenges modern dichotomies. Reflection upon the contemporary relevance of Bacon could contribute to the expanding and critical discussion on technoscience. In the following I will reconstruct the term "technoscience". My finding is that at least four different understandings or types of the term "technoscience" co-exist. In a second step, I will analyze and elaborate on Bacon's epistemological position. I will identify central elements of the four different understandings in Bacon's work. Finally, I will conclude that the epistemology of technoscience is, indeed, very old-it is the epistemological position put forward by Bacon.

  4. Gossip; Gift and Commodity in Francis Coventry’s History of Pompey the Little; or; The Life and Adventures of a Lap-Dog (1751

    Ana Vogrinčič

    2007-06-01

    Full Text Available Francis Coventry’s History of Pompey the Little represents one of the better known examples of today otherwise neglected eighteenth-century English novels of non human-characters. By pointing at thus far unacknowledged dimensions of the text; the article challenges the established reading of the book as put forward by Liz Bellamy in the theory of the ‘novels of circulation’. According to Bellamy; the peregrinating animals and objects of these narratives represent circulating commodities and thus symbolize alienated commercial society. Demonstrating that Pompey the lapdog rather functions as a gift and a gossip; this essay offers an alternative interpretation which opens up a different perspective on Coventry’s representation of society. Following from this; the paper aims at situating Pompey the Little’ within broader socio-cultural context of eighteenth-century England; as well as reflects on its place in fiction of the period. As such it advocates socio-historical approaches to literature.

  5. Model and prototype investigations of upper partial load unsteady phenomena on the Francis turbine designed for head up to 120 m

    Power Machines - LMZ, Saint-Petersburg, str. Vatutina 3A (Russian Federation))" data-affiliation=" (OJSC Power Machines - LMZ, Saint-Petersburg, str. Vatutina 3A (Russian Federation))" >Kuznetsov, I; Power Machines - LMZ, Saint-Petersburg, str. Vatutina 3A (Russian Federation))" data-affiliation=" (OJSC Power Machines - LMZ, Saint-Petersburg, str. Vatutina 3A (Russian Federation))" >Zakharov, A; Power Machines - LMZ, Saint-Petersburg, str. Vatutina 3A (Russian Federation))" data-affiliation=" (OJSC Power Machines - LMZ, Saint-Petersburg, str. Vatutina 3A (Russian Federation))" >Arm, V; Power Machines - LMZ, Saint-Petersburg, str. Vatutina 3A (Russian Federation))" data-affiliation=" (OJSC Power Machines - LMZ, Saint-Petersburg, str. Vatutina 3A (Russian Federation))" >Akulaev, R

    2014-01-01

    The upper partial load unsteady phenomena are often observed at model tests for Francis turbine with high and middle specific speed. It is appears approximately between 7085% of optima point discharge for constant unit speed value and has accompanied by additional phenomenon with much higher frequency than draft tube vortex precession frequency and also runner rotational frequency. There are some discussions about nature of this phenomena and transposition of unsteady model test results to the prototype. In this paper are presented the results of above mentioned phenomena model investigations and some results of investigation at prototype turbine. Based on the results of model tests the following extensive data have been obtained: pressure fluctuation in the draft tube cone and spiral case, axial force fluctuations, it is demonstrated the significant influence of cavitation on upper partial load unsteady phenomena. The result of measurements of bearing vibrations and pressure pulsations are presented for prototype turbine at corresponded or very close operation points to model. In accordance with obtained data it is demonstrated that at upper partial load operation the unsteady phenomenon is observed as for the model also for the prototype turbine. On the base of model investigation has been demonstrated the influence of air admission and special design solutions to diminish unsteady phenomena at upper partial load range. All investigations were based on the physical experiment. Thus, based on model and prototype experimental investigations it is obtained additional information about upper partial load unsteady phenomenon and confirmed the transposition of model results to prototype turbine

  6. Characterization of Fish Passage Conditions through a Francis Turbine, Spillway, and Regulating Outlet at Detroit Dam, Oregon, Using Sensor Fish, 2009

    Duncan, Joanne P.; Carlson, Thomas J.

    2011-05-06

    Fish passage conditions through two spillways, a Francis turbine, and a regulating outlet (RO) at Detroit Dam on the North Santiam River in Oregon were evaluated by Pacific Northwest National Laboratory for the U.S. Army Corps of Engineers (USACE), Portland District, using Sensor Fish devices. The objective of the study was to describe and compare passage exposure conditions, identifying potential fish injury regions within the routes. The study was performed in July, October, and December 2009 concurrent with HI-Z balloon-tag studies by Normandeau Associates, Inc. Sensor Fish data were analyzed to estimate 1) exposure conditions, particularly exposure to severe strike, collision, and shear events by passage route sub-regions; 2) differences in passage conditions between passage routes; and 3) relationships to live-fish injury and mortality data estimates. Comparison of the three passage routes evaluated at Detroit Dam indicates that the RO passage route through the 5-ft gate opening was relatively the safest route for fish passage under the operating conditions tested; turbine passage was the most deleterious. These observations were supported also by the survival and malady estimates obtained from live-fish testing. Injury rates were highest for turbine and spillway passage. However, none of the passage routes tested is safe for juvenile salmonid passage.

  7. Sloshing motion dynamics of a free surface in the draft tube cone of a Francis turbine operating in synchronous condenser mode

    Vagnoni, Elena; Andolfatto, Loïc; Favrel, Arthur; Avellan, François

    2016-11-01

    The penetration of the electrical grid by intermittent renewable energy sources induces grid fluctuations which must be compensated in order to guarantee the stability of the grid. Hydropower plants can supply reactive power to ensure the grid stabilization by operating in condenser mode. In this operating mode, the turbine operates with the tail water depressed to let the runner spin in air to reduce the power consumption. Pressurized air is injected in the draft tube cone to maintain the water level below the runner and this induces air-water interaction phenomena which cause important power losses. Flow visualization and pressure fluctuation measurements are performed in a reduced scale physical model of a Francis turbine operating in condenser mode to investigate the dynamics of the air-water interaction in the draft tube cone which causes the sloshing motion of the free surface. An image post-processing method is developed, enabling a quantitative description of the sloshing motion. The latter depends on the Froude number. By increasing the value of the Froude number, the amplitude of the sloshing motion decreases, as well as the amplitude of the pressure fluctuations. The frequency of the sloshing motion corresponds to the first natural frequency of the water volume.

  8. Análise de sobrevida global em pacientes diagnosticados com carcinoma de células escamosas de boca no INCA no ano de 1999 Overall survival analysis in oral squamous cell carcinoma patients diagnosed at the National Cancer Institute in 1999

    Julia Honorato

    2009-03-01

    Full Text Available O carcinoma de células escamosas de boca compreende cerca de 90 a 95% de todas as neoplasias malignas da boca e é um dos tipos de câncer mais frequentes no Brasil. O índice de sobrevida em 5 anos é baixo e permaneceu estável nas últimas décadas, apesar dos avanços nas terapias. O objetivo deste estudo foi analisar o perfil e a sobrevida global dos pacientes diagnosticados com carcinoma de células escamosas de boca no ano de 1999 no Instituto Nacional de Câncer. Dos 320 pacientes incluídos no estudo, 79,4% eram homens. A idade média foi de 56,7 anos, e 82,2% deles fumavam e/ou bebiam. A língua, seguida do assoalho de boca foram os locais mais acometidos. A maioria (68,9% dos pacientes foi diagnosticada em estádios tardios e submetida à radioterapia exclusiva (53,6%. A sobrevida média no período do estudo foi de 29,4 meses. Os pacientes dos estádios iniciais apresentaram maior sobrevida, assim como aqueles submetidos apenas à cirurgia como forma de tratamento e os que não apresentaram linfonodos acometidos ao diagnóstico. Tumores localizados em palato duro e mucosa jugal apresentaram pior prognóstico. Foram fatores preditivos independentes de melhor sobrevida os tumores T1 ou T2 (p=0,001, sem acometimento de linfonodos (p=0,012 e não localizados em mucosa jugal (p=0,021. O diagnóstico do câncer oral ainda se faz em estádios tardios, o que influencia negativamente a sobrevida global dos pacientes. Maior ênfase deve ser dada à capacitação dos profissionais para o reconhecimento precoce do câncer e à conscientização da população de risco.Oral squamous cell carcinoma accounts for 90 to 95% of all malignant neoplasms of the mouth and it is one of most common cancers in Brazil. Five-year survival rates remain low and have not improved over the past decades, despite advances in therapy. The purpose of this study was to analyze the features and overall survival of patients diagnosed with oral squamous cell carcinoma in

  9. Detección de VPH en boca y cérvix de pacientes con diagnóstico citológico sugestivo de infección genital HPV detection in the mouth and cervix of patients with histological diagnosis suggestive of genital infection

    Z. De Guglielmo; M. Ávila; D. Veitía; A. Fernandes; C. Venegas; M. Correnti de Plata

    2012-01-01

    En este trabajo se evaluó la presencia de VPH en la cavidad bucal (mediante oroscopia y citología oral exfoliativa) y su relación con la infección genital en mujeres con diagnóstico citológico sugestivo de infección por VPH. La muestra consistió en 60 pacientes a quienes se les realizó oroscopia, citología y determinación viral en boca y cérvix por PCR, utilizando los iniciadores genéricos MY09/MY11 y MPCR. Se detectó ADN de VPH en las mucosas oral y genital en 48,33 % y 73,3% de las paciente...

  10. Câncer de boca: expressão imuno-histoquímica de c-erbB-2, Bcl-2 e EGFR - estudo comparativo com leucoplasia e hiperplasia inflamatória = Oral cancer: immunohistochemical expression of c-erbB-2, Bcl-2 and EGFR – study with leukoplakia and inflammatory hyperplasia

    Barros, Rosana M. G.

    2005-01-01

    Full Text Available Anormalidades em genes que regulam a proliferação e morte celular podem provocar inúmeras doenças entre elas o carcinoma epidermóide de boca. Tem sido relatado que alterações genéticas nas células tumorais predizem a agressividade biológica dos tumores. Marcadores genéticos como c-erbB-2, Bcl-2 e EGFR são considerados indicadores promissores de prognósticos para as lesões cancerizáveis e as neoplasias. Objetivo: Avaliar a expressão imunohistoquímica das proteínas c-erbB-2, Bcl-2 e EGFR (oncoproteínas envolvidas nas vias de proliferação celular Material e Métodos: cento e cinco blocos e parafina contendo fragmentos de biopsias incisionais, sendo 54 de carcinomas epidermóides, 25 blocos de leucoplasias e 26 blocos de hiperlasias obtidos do Laboratório de Patologia de Boca da Universidade Federal de Mato Grosso do Sul (UFSM. A expressão das proteínas foi verificada através da técnica imunohistoquímica utilizando a estreptoavidina-biotina-peroxidase no Laboratório de Patologia da Universidade de Brasília (UNB. Resultados: Os resultados revelaram diferença estatisticamente significante da proteína EGFR para os carcinomas epidermóides de boca e para as demais proteínas não houve diferença estatisticamente significante entre as lesões. Conclusões: Os resultados sugerem que o EGFR pode ser utilizado como marcador em carcinoma de boca podendo contribuir para a progressão da neoplasia, porém sendo insuficiente na predição da carcinogênese. Abnormalities in genes that regulate the proliferation and cell death can provoke many lesions as oral epidermal carcinoma. It has been related that genetic alterations in tumoral cells predict the biologic agressivity in the tumors. Genetic markers as cerbB-2, Bcl-2 and EGFR are considered indicators of prognostic to the pre-malignant lesions and neoplasias. Objective: to study in the fragments of incisional biopsy the expression of c-erbB-2, Bcl-2 and EGFR proteins

  11. Investigation of the fluid-structure interaction of a high head Francis turbine using OpenFOAM and Code_Aster

    Eichhorn, M.; Doujak, E.; Waldner, L.

    2016-11-01

    The increasing energy consumption and highly stressed power grids influence the operating conditions of turbines and pump turbines in the present situation. To provide or use energy as quick as possible, hydraulic turbines are operated more frequent and over longer periods of time in lower part load at off-design conditions. This leads to a more turbulent behavior and to higher requirements of the strength of stressed components (e.g. runner, guide or stay vanes). The modern advantages of computational capabilities regarding numerical investigations allow a precise prediction of appearing flow conditions and thereby induced strains in hydraulic machines. This paper focuses on the calculation of the unsteady pressure field of a high head Francis turbine with a specific speed of nq ≈ 24 min-1 and its impact on the structure at different operating conditions. In the first step, unsteady numerical flow simulations are performed with the open-source CFD software OpenFOAM. To obtain the appearing dynamic flow phenomena, the entire machine, consisting of the spiral casing, the stay vanes, the wicket gate, the runner and the draft tube, is taken into account. Additionally, a reduced model without the spiral casing and with a simplified inlet boundary is used. To evaluate the accuracy of the CFD simulations, operating parameters such as head and torque are compared with the results of site measurements carried out on the corresponding prototype machine. In the second part, the obtained pressure fields are used for a fluid-structure analysis with the open-source Finite Element software Code_Aster, to predict the static loads on the runner.

  12. The Battle Between the Biometricians and the Mendelians: How Sir Francis Galton's Work Caused his Disciples to Reach Conflicting Conclusions About the Hereditary Mechanism

    Gillham, Nicholas W.

    2015-01-01

    Francis Galton, Charles Darwin's cousin, had wide and varied interests. They ranged from exploration and travel writing to fingerprinting and the weather. After reading Darwin's On the Origin of Species, Galton reached the conclusion that it should be possible to improve the human stock through selective breeding, as was the case for domestic animals and cultivated plants. Much of the latter half of Galton's career was devoted to trying to devise methods to distinguish men of good stock and then to show that these qualities were inherited. But along the way he invented two important statistical methods: regression and correlation. He also discovered regression to the mean. This led Galton to believe that evolution could not proceed by the small steps envisioned by Darwin, but must proceed by discontinuous changes. Galton's book Natural Inheritance (1889) served as the inspiration for Karl Pearson, W.F.R. Weldon and William Bateson. Pearson and Weldon were interested in continuously varying characters and the application of statistical techniques to their study. Bateson was fascinated by discontinuities and the role they might play in evolution. Galton proposed his Law of Ancestral Heredity in the last decade of the nineteenth century. At first this seemed to work well as an explanation for continuously varying traits of the type that interested Pearson and Weldon. In contrast, Bateson had published a book on discontinuously varying traits so he was in a position to understand and embrace Mendel's principles of inheritance when they were rediscovered in 1900. The subsequent battle between Weldon and Pearson, the biometricians, and Bateson, the Mendelian, went on acrimoniously for several years at the beginning of the twentieth century before Mendelian theory finally won out.

  13. Vortical structures and pressure pulsations in draft tube of a Francis-99 turbine at part load: RANS and hybrid RANS/LES analysis

    Gavrilov, A.A.; Sentyabov, A.V.; Dekterev, A.A.; Hanjalić, K.

    2017-01-01

    Highlights: • Simulations showed the formation of spiralling coherent vortices in the draft tube. • Both hybrid RANS-LES and Re-stress models reproduced well the measured fluctuations. • Re-stress model resolved the precessing vortex core and coherent spiralling vortices. - Abstract: Recognizing the limitations of the conventional linear-eddy-viscosity (LEVM) Reynolds-averaged Navier–Stokes (RANS) models to reproduce complex three-dimensional unsteady flows in hydraulic machinery, we performed a comparative assessment of a second-moment (Re-stress model, RSM) RANS closure and a hybrid RANS/LES method in capturing the flow and vortical structures in the draft tube of a Francis hydroturbine at off-design conditions. Considered is a case of part load (PL) at a flow rate of only 35% of the best efficiency point (BEP) characterised by multiple unsteady vortex systems. Despite some remaining uncertainties in generating the inflow conditions, both approaches reproduced reasonably well the measured mean velocity and the rms of its fluctuations, as well as the pressure spectrum with peaks detecting the precessing vortex core. In contrast to the common LEVMs, the Re-stress closure showed sufficient receptivity to intrinsic unsteadiness and reproduced well the overall flow and vortical patterns as well as the associated pressure pulsations in accord with the experiments. The hybrid RANS/LES method gave similar predictions as the RSM, but resolving a wider range of scales, which however, showed no significant effect on the dynamics of the dominant processing vortex core and the pressure pulsations.

  14. Group X

    Fields, Susannah

    2007-08-16

    This project is currently under contract for research through the Department of Homeland Security until 2011. The group I was responsible for studying has to remain confidential so as not to affect the current project. All dates, reference links and authors, and other distinguishing characteristics of the original group have been removed from this report. All references to the name of this group or the individual splinter groups has been changed to 'Group X'. I have been collecting texts from a variety of sources intended for the use of recruiting and radicalizing members for Group X splinter groups for the purpose of researching the motivation and intent of leaders of those groups and their influence over the likelihood of group radicalization. This work included visiting many Group X websites to find information on splinter group leaders and finding their statements to new and old members. This proved difficult because the splinter groups of Group X are united in beliefs, but differ in public opinion. They are eager to tear each other down, prove their superiority, and yet remain anonymous. After a few weeks of intense searching, a list of eight recruiting texts and eight radicalizing texts from a variety of Group X leaders were compiled.

  15. Group Flow and Group Genius

    Sawyer, Keith

    2015-01-01

    Keith Sawyer views the spontaneous collaboration of group creativity and improvisation actions as "group flow," which organizations can use to function at optimum levels. Sawyer establishes ideal conditions for group flow: group goals, close listening, complete concentration, being in control, blending egos, equal participation, knowing…

  16. Preliminary study for the revitalisation of the 'Duersteller' small hydropower installation in Wetzikon, Switzerland; Vorstudie Kleinwasserkraftwerk J. Duersteler and Co AG Wetzikon ZH. Revitalisierungsvorhaben des Kraftwerkes mit seinen 80-jaehrigen Francis-Doppelturbinen

    NONE

    2004-07-01

    This report for the Swiss Federal Office of Energy (SFOE) discusses the possibility of revitalising an 80-year-old, small industrial hydropower plant fitted with twin Francis turbines. The present situation and the condition of the turbines and their associated water channels are described and the hydrological data of the Aabach stream is presented. Details are given on the presently installed technical apparatus and the legal and ownership situation. Environmental and historical aspects are discussed. The economics of the proposed revitalisation project are discussed and possible restrictions that could be enforced by the authorities are looked at. The report is concluded with recommendations for further action.

  17. Influence of Hydraulic Design on Stability and on Pressure Pulsations in Francis Turbines at Overload, Part Load and Deep Part Load based on Numerical Simulations and Experimental Model Test Results

    Magnoli, M V; Maiwald, M

    2014-01-01

    Francis turbines have been running more and more frequently in part load conditions, in order to satisfy the new market requirements for more dynamic and flexible energy generation, ancillary services and grid regulation. The turbines should be able to be operated for longer durations with flows below the optimum point, going from part load to deep part load and even speed-no-load. These operating conditions are characterised by important unsteady flow phenomena taking place at the draft tube cone and in the runner channels, in the respective cases of part load and deep part load. The current expectations are that new Francis turbines present appropriate hydraulic stability and moderate pressure pulsations at overload, part load, deep part load and speed-no-load with high efficiency levels at normal operating range. This study presents series of investigations performed by Voith Hydro with the objective to improve the hydraulic stability of Francis turbines at overload, part load and deep part load, reduce pressure pulsations and enlarge the know-how about the transient fluid flow through the turbine at these challenging conditions. Model test measurements showed that distinct runner designs were able to influence the pressure pulsation level in the machine. Extensive experimental investigations focused on the runner deflector geometry, on runner features and how they could reduce the pressure oscillation level. The impact of design variants and machine configurations on the vortex rope at the draft tube cone at overload and part load and on the runner channel vortex at deep part load were experimentally observed and evaluated based on the measured pressure pulsation amplitudes. Numerical investigations were employed for improving the understanding of such dynamic fluid flow effects. As example for the design and experimental investigations, model test observations and pressure pulsation curves for Francis machines in mid specific speed range, around n qopt = 50

  18. Permutation groups

    Passman, Donald S

    2012-01-01

    This volume by a prominent authority on permutation groups consists of lecture notes that provide a self-contained account of distinct classification theorems. A ready source of frequently quoted but usually inaccessible theorems, it is ideally suited for professional group theorists as well as students with a solid background in modern algebra.The three-part treatment begins with an introductory chapter and advances to an economical development of the tools of basic group theory, including group extensions, transfer theorems, and group representations and characters. The final chapter feature

  19. Group devaluation and group identification

    Leach, C.W.; Rodriguez Mosquera, P.M.; Vliek, M.L.W.; Hirt, E.

    2010-01-01

    In three studies, we showed that increased in-group identification after (perceived or actual) group devaluation is an assertion of a (preexisting) positive social identity that counters the negative social identity implied in societal devaluation. Two studies with real-world groups used order

  20. Lie groups and algebraic groups

    We give an exposition of certain topics in Lie groups and algebraic groups. This is not a complete ... of a polynomial equation is equivalent to the solva- bility of the equation ..... to a subgroup of the group of roots of unity in k (in particular, it is a ...

  1. OS MELHORES E OS PIORES: O BOCA A BOCA EM SITES DE VAREJO ELETRÔNICO

    Fabrício de Carvalho Inocêncio

    2016-09-01

    Full Text Available This paper aims to investigate the internal dimensions of Word-of-Mouth (WOM behavior, comparing the best and the worst Brazilian e-tail websites in four dimensions: intensity, positive valence, negative valence and content. The research used for this paper is based on the multidimensional framework of Goyette, Ricard, Bergeron, and Marticotte (2010. It suggests that WOM intensity is higher in the case of the best websites, while the degree of promotion (positive valence of the best websites is lower than the degree of detraction (negative valence of the worst websites. This result supports previous findings, showing that negative WOM is passionate and extreme. Yet, elements such as trust, delivery time and post-purchase support, reinforce both positive WOM in the best websites and negative WOM in the worst websites. However, security of transaction and ease of use do not reinforce negative WOM in the worst websites, suggesting a certain degree of commoditization of such factors between the best and the worst websites.

  2. Postmodernism, phenomenology and afriphenomenology | Francis ...

    In this paper, I aimed to study the relationship between postmodernism and phenomenology. In the study, I established that postmodernism and phenomenology bear similar ontological marking, which base their concepts and methodologies on an individualistic framework. On the basis of such ontological framework, ...

  3. St Francis Hydro, Soils data

    U.S. Environmental Protection Agency — We collected data 2012-2016 covering spatially-explicit, soil layering, bulk density, drainage rate (2012, 2015) infiltration into rain garden mulch and mineral soil...

  4. Identiteet ja migratsioon / Francis Fukuyama

    Fukuyama, Francis

    2007-01-01

    Autor peab islamiäärmuslust immigrantide identiteedikriisi ilminguks ning arutleb identiteedipoliitika olemuse ja tuleviku üle Euroopa ja Ameerika postmodernses multikultuurilises ühiskonnas. Vt. samas: Jeffrey Goldstein: Euroopa ja USA - konkurendid või partnerid

  5. Group Work

    Wilson, Kristy J.; Brickman, Peggy; Brame, Cynthia J.

    2018-01-01

    Science, technology, engineering, and mathematics faculty are increasingly incorporating both formal and informal group work in their courses. Implementing group work can be improved by an understanding of the extensive body of educational research studies on this topic. This essay describes an online, evidence-based teaching guide published by…

  6. Reflection groups

    Eggermont, G.

    2006-01-01

    In 2005, PISA organised proactive meetings of reflection groups on involvement in decision making, expert culture and ethical aspects of radiation protection.All reflection group meetings address particular targeted audiences while the output publication in book form is put forward

  7. Confiabilidade e validade das declarações de óbito por câncer de boca no Município do Rio de Janeiro Reliability and accuracy of oral cancer as the reported underlying cause of death in the Municipality of Rio de Janeiro

    Rejane Christine de Sousa Queiroz

    2003-12-01

    Full Text Available As estatísticas de mortalidade constituem uma fonte bastante utilizada em estudos epidemiológicos de neoplasias. Com o objetivo de avaliar a confiabilidade e a validade da causa básica de morte "câncer de boca", no Município do Rio de Janeiro, selecionou-se no banco de dados da Secretaria Municipal de Saúde, todas as declarações de óbito (DOs com essa causa básica, no ano de 1999. As DOs foram submetidas à nova codificação da causa básica, por técnico independente, e construiu-se formulário padronizado para coleta de dados clínicos e laboratoriais para a confirmação do diagnóstico nos prontuários médicos de cada caso. Foi considerado como padrão-ouro o diagnóstico de câncer de boca formulado com base no exame histopatológico e/ou história clínica. Observou-se concordância simples de 95,1% e coeficiente kappa de 0,93. O valor preditivo positivo correspondeu a 86,5%. Conclui-se que as estatísticas de mortalidade por neoplasia de boca no Município do Rio de Janeiro são confiáveis e que é boa a validade desta causa básica, possivelmente, por se tratar de sítio de fácil acesso para a inspeção direta e com maior facilidade de confirmação clínica.Mortality statistics are frequently employed in cancer epidemiology studies. The aim of this research was to evaluate the reliability and validity of oral cavity cancer as the underlying cause of death reported on death certificates in the Municipality of Rio de Janeiro, Brazil. All death certificates since 1999 reporting this underlying cause of death were selected from the Municipal Mortality Information System. The death certificates were re-coded by an independent technician, and a standardized questionnaire was designed to collect clinical and laboratory data for diagnostic confirmation from patient records. Histopathological results and/or clinical history were considered as the gold standard to establish the diagnosis of cancer of the mouth. Reliability analysis

  8. Group theory

    Scott, W R

    2010-01-01

    Here is a clear, well-organized coverage of the most standard theorems, including isomorphism theorems, transformations and subgroups, direct sums, abelian groups, and more. This undergraduate-level text features more than 500 exercises.

  9. Group Grammar

    Adams, Karen

    2015-01-01

    In this article Karen Adams demonstrates how to incorporate group grammar techniques into a classroom activity. In the activity, students practice using the target grammar to do something they naturally enjoy: learning about each other.

  10. Computer group

    Bauer, H.; Black, I.; Heusler, A.; Hoeptner, G.; Krafft, F.; Lang, R.; Moellenkamp, R.; Mueller, W.; Mueller, W.F.; Schati, C.; Schmidt, A.; Schwind, D.; Weber, G.

    1983-01-01

    The computer groups has been reorganized to take charge for the general purpose computers DEC10 and VAX and the computer network (Dataswitch, DECnet, IBM - connections to GSI and IPP, preparation for Datex-P). (orig.)

  11. Group learning

    Pimentel, Ricardo; Noguira, Eloy Eros da Silva; Elkjær, Bente

    The article presents a study that aims at the apprehension of the group learning in a top management team composed by teachers in a Brazilian Waldorf school whose management is collective. After deciding to extend the school, they had problems recruiting teachers who were already trained based...... on the Steiner´s ideas, which created practical problems for conducting management activities. The research seeks to understand how that group of teachers collectively manage the school, facing the lack of resources, a significant heterogeneity in the relationships, and the conflicts and contradictions......, and they are interrelated to the group learning as the construction, maintenance and reconstruction of the intelligibility of practices. From this perspective, it can be said that learning is a practice and not an exceptional phenomenon. Building, maintaining and rebuilding the intelligibility is the group learning...

  12. Tendências de mortalidade por câncer de boca e orofaringe no Município de São Paulo, Brasil, 1980/2002 Trends in oral cancer mortality in the city of São Paulo, Brazil, 1980-2002

    Maria Gabriela Haye Biazevic

    2006-10-01

    Full Text Available Objetivou-se descrever e explorar analiticamente tendências de mortalidade por câncer de boca e orofaringe na cidade de São Paulo, Brasil, de 1980 a 2002. Dados sobre os óbitos com esta causa básica foram levantados junto à Fundação Sistema Estadual de Análise de Dados, discriminados por sexo, idade e localização anatômica. A estimação e ajuste pelo método direto dos coeficientes usaram dados de população fornecidos pelos censos de 1980, 1991 e 2000, e pela contagem populacional de 1996, realizados pelo Instituto Brasileiro de Geografia e Estatística. Foi observada tendência crescente da mortalidade devida ao agravo, a uma taxa anual de 0,72%. Responsável por mais de um terço desses óbitos, o câncer de língua foi a categoria com mortalidade mais elevada. Câncer de lábio, gengiva e área retromolar apresentaram tendência decrescente, enquanto orofaringe e partes não especificadas da boca e orofaringe sofreram incremento de mortalidade. O monitoramento da magnitude e tendências da mortalidade por câncer pode configurar importante implemento para o planejamento de iniciativas voltadas à redução da carga de doença em nosso meio.The current study assessed trends in oral cancer mortality in the city of São Paulo, Brazil, from 1980 to 2002. The official mortality information system supplied data on deaths whose underlying cause was classified as oral cancer, stratified by sex, age, and anatomic site. Death rates were estimated and adjusted by the direct method, using population data supplied by national censuses from 1980, 1991, and 2000 and a population count performed in 1996. There was an upward trend in overall cancer mortality, at a yearly rate of 0.72%. Accounting for more than one third of these deaths, tongue cancer was the main mortality category. Labial, gengival, and retromolar cancer showed a downward trend, while oropharyngeal cancer and cancer in unspecified parts of the mouth and oropharynx showed

  13. Desigualdade social no adoecimento e morte por câncer de boca e orofaríngeo no município de São Paulo, Brasil: 1997 a 2008 Social inequality in morbidity and mortality from oral and oropharyngeal cancer in the city of São Paulo, Brazil: 1997-2008

    Maria Angela Fernandes Ferreira

    2012-09-01

    Full Text Available A ocupação do espaço geográfico é determinada historicamente pelo modelo socioeconômico e pelo dinamismo de suas relações sociais, políticas e ideológicas. O objetivo deste trabalho é avaliar a distribuição espacial e o efeito de indicadores socioeconômicos no adoecimento e morte por câncer de boca e orofaríngeo no Município de São Paulo, Brasil, no período de 1997 a 2008. Os dados foram coletados no Registro de Câncer de Base Populacional e no Programa de Aprimoramento das Informações de Mortalidade - PRO-AIM e georreferenciados pelos softwares Terraview e GeoDa. O referencial teórico para avaliação dos resultados foi baseado na teoria de Milton Santos. As taxas de incidência apresentaram um índice de autocorrelação Global de Moran de 0,226 e as taxas de mortalidade de 0,337. A Incidência de câncer de boca e orofaríngeo não apresenta um padrão espacial bem definido no Município de São Paulo, mas é bastante desigual no que se refere à Mortalidade, concentrando as suas menores taxas na área central, mais rica e economicamente menos desigual.Occupation of geographical space is historically determined by the socioeconomic model and the dynamism of its social, political, and ideological relations. This study aimed to evaluate the spatial distribution of morbidity and mortality from cancer of the mouth and oropharynx and related socioeconomic variables in the city of São Paulo, Brazil, from 1997 to 2008. Data were collected from the Population-Based Cancer Registry and the Program for Improvement of Mortality Data (PRO-AIM and were georeferenced using Terraview and GeoDa. The theoretical framework for evaluating the results was the work of Milton Santos. The incidence rates showed spatial autocorrelation with a Global Moran index of 0.226 and mortality rates of 0.337. Incidence of cancer of the mouth and oropharynx did not show a well-defined spatial pattern in the city of São Paulo, but mortality rates were

  14. Group technology

    Rome, C.P.

    1976-01-01

    Group Technology has been conceptually applied to the manufacture of batch-lots of 554 machined electromechanical parts which now require 79 different types of metal-removal tools. The products have been grouped into 7 distinct families which require from 8 to 22 machines in each machine-cell. Throughput time can be significantly reduced and savings can be realized from tooling, direct-labor, and indirect-labor costs

  15. Abelian groups

    Fuchs, László

    2015-01-01

    Written by one of the subject’s foremost experts, this book focuses on the central developments and modern methods of the advanced theory of abelian groups, while remaining accessible, as an introduction and reference, to the non-specialist. It provides a coherent source for results scattered throughout the research literature with lots of new proofs. The presentation highlights major trends that have radically changed the modern character of the subject, in particular, the use of homological methods in the structure theory of various classes of abelian groups, and the use of advanced set-theoretical methods in the study of undecidability problems. The treatment of the latter trend includes Shelah’s seminal work on the undecidability in ZFC of Whitehead’s Problem; while the treatment of the former trend includes an extensive (but non-exhaustive) study of p-groups, torsion-free groups, mixed groups, and important classes of groups arising from ring theory. To prepare the reader to tackle these topics, th...

  16. Group dynamics.

    Scandiffio, A L

    1990-12-01

    Group dynamics play a significant role within any organization, culture, or unit. The important thing to remember with any of these structures is that they are made up of people--people with different ideas, motivations, background, and sometimes different agendas. Most groups, formal or informal, look for a leader in an effort to maintain cohesiveness of the unit. At times, that cultural bond must be developed; once developed, it must be nurtured. There are also times that one of the group no longer finds the culture comfortable and begins to act out behaviorally. It is these times that become trying for the leader as she or he attempts to remain objective when that which was once in the building phase of group cohesiveness starts to fall apart. At all times, the manager must continue to view the employee creating the disturbance as an integral part of the group. It is at this time that it is beneficial to perceive the employee exhibiting problem behaviors as a special employee, as one who needs the benefit of your experience and skills, as one who is still part of the group. It is also during this time that the manager should focus upon her or his own views in the area of power, communication, and the corporate culture of the unit that one has established before attempting to understand another's point of view. Once we understand our own motivation and accept ourselves, it is then that we may move on to offer assistance to another. Once we understand our insecurities recognizing staff dysfunction as a symptom of system dysfunction will not be so threatening to the concept of the manager that we perceive ourselves to be. It takes a secure person to admit that she or he favors staff before deciding to do something to change things. The important thing to know is that it can be done. The favored staff can find a new way of relating to others, the special employee can find new modes of behavior (and even find self-esteem in the process), the group can find new ways

  17. Group representations

    Karpilovsky, G

    1994-01-01

    This third volume can be roughly divided into two parts. The first part is devoted to the investigation of various properties of projective characters. Special attention is drawn to spin representations and their character tables and to various correspondences for projective characters. Among other topics, projective Schur index and projective representations of abelian groups are covered. The last topic is investigated by introducing a symplectic geometry on finite abelian groups. The second part is devoted to Clifford theory for graded algebras and its application to the corresponding theory

  18. Lego Group

    Møller Larsen, Marcus; Pedersen, Torben; Slepniov, Dmitrij

    2010-01-01

    The last years’ rather adventurous journey from 2004 to 2009 had taught the fifth-largest toy-maker in the world - the LEGO Group - the importance of managing the global supply chain effectively. In order to survive the largest internal financial crisis in its roughly 70 years of existence......, the management had, among many initiatives, decided to offshore and outsource a major chunk of its production to Flextronics. In this pursuit of rapid cost-cutting sourcing advantages, the LEGO Group planned to license out as much as 80 per cent of its production besides closing down major parts...

  19. Study of the use of a micro hydro in knockdown container completed with a cylindrical form housing of francis hydraulic turbine to support the development program of energy self-sustainability for remote and isolated areas in Indonesia

    Kamal, Samsul; Prajitno; Pardadi, Janu

    2017-11-01

    With an intention to reduce the consumption of energy from fossil fuels and the CO2 emission in relation with the climate change solution, Indonesian Government has targeted that the role of the New and Renewable Energy (NRE) resources reaches at least 23% , or about 27 GW , in 2025 and it is expected to increase to the extent of about 134 GW in 2050 within the scenario of mixed energy supply. Geographically Indonesia has many remote and isolated areas with lack of appropriate infrastructure supports. But in the most of the areas, huge potential of new and renewable energy are available such as hydro energy is about 75 GW, biomass energy is about 32 GW and bio fuel is about 32 GW. The total utilization of the energy from small hydro energy up to this year for example is only about 300 MW. The significant obstacle in optimizing the utilization of small hydro energy in the areas is mainly on the infrastructure conditions and the local manufacture capabilities. Difficulties in mobilization of experts, skill worker , parts and constructions material result in very time consuming and costly for site construction. In this research a hydro turbine built in knock down container completed with a Francis turbine in cylindrical form housing is proposed and reported its performance on implementation. The hydro in a knock down container concept comes from the idea to manufacture hydro power solutions in a knock down container, readymade to be transported to installation sites. It can be easily manufactured in a quality controlled and cost effective environment, transported and installed in remote areas, to operate and maintain with minimal amount of equipment. It shows that the implementation of the unit in a remote area has reduced the total site construction time by 1/3 compared to the predicted one with conventional unit. The performance of the Francis turbine with cylindrical form housing has shown comparable with the conventional one which has volute form housing. The

  20. Informal groups

    E. van den Berg; P. van Houwelingen; J. de Hart

    2011-01-01

    Original title: Informele groepen Going out running with a group of friends, rather than joining an official sports club. Individuals who decide to take action themselves rather than giving money to good causes. Maintaining contact with others not as a member of an association, but through an

  1. COMMUNICATIONS GROUP

    L. Taylor

    2011-01-01

    The CMS Communications Group, established at the start of 2010, has been busy in all three areas of its responsibility: (1) Communications Infrastructure, (2) Information Systems, and (3) Outreach and Education. Communications Infrastructure There are now 55 CMS Centres worldwide that are well used by physicists working on remote CMS shifts, Computing operations, data quality monitoring, data analysis and outreach. The CMS Centre@CERN in Meyrin, is the centre of the CMS offline and computing operations, hosting dedicated analysis efforts such as during the CMS Heavy Ion lead-lead running. With a majority of CMS sub-detectors now operating in a “shifterless” mode, many monitoring operations are now routinely performed from there, rather than in the main Control Room at P5. The CMS Communications Group, CERN IT and the EVO team are providing excellent videoconferencing support for the rapidly-increasing number of CMS meetings. In parallel, CERN IT and ...

  2. Group therapy

    Anon.

    1993-01-01

    Full text: In his review 'Genesis of Unified Gauge Theories' at the symposium in Honour of Abdus Salam (June, page 23), Tom Kibble of Imperial College, London, looked back to the physics events around Salam from 1959-67. He described how, in the early 1960s, people were pushing to enlarge the symmetry of strong interactions beyond the SU(2) of isospin and incorporate the additional strangeness quantum number. Kibble wrote - 'Salam had students working on every conceivable symmetry group. One of these was Yuval Ne'eman, who had the good fortune and/or prescience to work on SU(3). From that work, and of course from the independent work of Murray Gell- Mann, stemmed the Eightfold Way, with its triumphant vindication in the discovery of the omega-minus in 1964.' Yuval Ne'eman writes - 'I was the Defence Attaché at the Israeli Embassy in London and was admitted by Salam as a part-time graduate student when I arrived in 1958. I started research after resigning from the Embassy in May 1960. Salam suggested a problem: provide vector mesons with mass - the problem which was eventually solved by Higgs, Guralnik, Kibble,.... (as described by Kibble in his article). I explained to Salam that I had become interested in symmetry. Nobody at Imperial College at the time, other than Salam himself, was doing anything in groups, and attention further afield was focused on the rotation - SO(N) - groups. Reacting to my own half-baked schemes, Salam told me to forget about the rotation groups he taught us, and study group theory in depth, directing me to Eugene Dynkin's classification of Lie subalgebras, about which he had heard from Morton Hamermesh. I found Dynkin incomprehensible without first learning about Lie algebras from Henri Cartan's thesis, which luckily had been reproduced by Dynkin in his 1946 thesis, using his diagram method. From a copy of a translation of Dynkin's thesis which I found in the British Museum Library, I

  3. COMMUNICATIONS GROUP

    L. Taylor

    2010-01-01

    The CMS Communications Group, established at the start of 2010, has been strengthening the activities in all three areas of its responsibility: (1) Communications Infrastructure, (2) Information Systems, and (3) Outreach and Education. Communications Infrastructure The Communications Group has invested a lot of effort to support the operations needs of CMS. Hence, the CMS Centres where physicists work on remote CMS shifts, Data Quality Monitoring, and Data Analysis are running very smoothly. There are now 55 CMS Centres worldwide, up from just 16 at the start of CMS data-taking. The latest to join are Imperial College London, the University of Iowa, and the Università di Napoli. The CMS Centre@CERN in Meyrin, which is now full repaired after the major flooding at the beginning of the year, has been at the centre of CMS offline and computing operations, most recently hosting a large fraction of the CMS Heavy Ion community during the lead-lead run. A number of sub-detector shifts can now take pla...

  4. Group play

    Tychsen, Anders; Hitchens, Michael; Brolund, Thea

    2008-01-01

    Role-playing games (RPGs) are a well-known game form, existing in a number of formats, including tabletop, live action, and various digital forms. Despite their popularity, empirical studies of these games are relatively rare. In particular there have been few examinations of the effects of the v......Role-playing games (RPGs) are a well-known game form, existing in a number of formats, including tabletop, live action, and various digital forms. Despite their popularity, empirical studies of these games are relatively rare. In particular there have been few examinations of the effects...... of the various formats used by RPGs on the gaming experience. This article presents the results of an empirical study, examining how multi-player tabletop RPGs are affected as they are ported to the digital medium. Issues examined include the use of disposition assessments to predict play experience, the effect...... of group dynamics, the influence of the fictional game characters and the comparative play experience between the two formats. The results indicate that group dynamics and the relationship between the players and their digital characters, are integral to the quality of the gaming experience in multiplayer...

  5. COMMUNICATIONS GROUP

    L. Taylor

    2011-01-01

    The CMS Communications Group has been busy in all three areas of its responsibility: (1) Communications Infrastructure, (2) Information Systems, and (3) Outreach and Education. Communications Infrastructure The 55 CMS Centres worldwide are well used by physicists working on remote CMS shifts, Computing operations, data quality monitoring, data analysis and outreach. The CMS Centre@CERN in Meyrin, is the centre of the CMS Offline and Computing operations, and a number of subdetector shifts can now take place there, rather than in the main Control Room at P5. A new CMS meeting room has been equipped for videoconferencing in building 42, next to building 40. Our building 28 meeting room and the facilities at P5 will be refurbished soon and plans are underway to steadily upgrade the ageing equipment in all 15 CMS meeting rooms at CERN. The CMS evaluation of the Vidyo tool indicates that it is not yet ready to be considered as a potential replacement for EVO. The Communications Group provides the CMS-TV (web) cha...

  6. COMMUNICATIONS GROUP

    L. Taylor

    2010-01-01

    The recently established CMS Communications Group, led by Lucas Taylor, has been busy in all three of its main are areas of responsibility: Communications Infrastructure, Information Systems, and Outreach and Education Communications Infrastructure The damage caused by the flooding of the CMS Centre@CERN on 21st December has been completely repaired and all systems are back in operation. Major repairs were made to the roofs, ceilings and one third of the floor had to be completely replaced. Throughout these works, the CMS Centre was kept operating and even hosted a major press event for first 7 TeV collisions, as described below. Incremental work behind the scenes is steadily improving the quality of the CMS communications infrastructure, particularly Webcasting, video conferencing, and meeting rooms at CERN. CERN/IT is also deploying a pilot service of a new videoconference tool called Vidyo, to assess whether it might provide an enhanced service at a lower cost, compared to the EVO tool currently in w...

  7. COMMUNICATIONS GROUP

    L. Taylor

    2011-01-01

    Communications Infrastructure The 55 CMS Centres worldwide are well used by physicists working on remote CMS shifts, Computing operations, data quality monitoring, data analysis and outreach. The CMS Centre@CERN in Meyrin is particularly busy at the moment, hosting about 50 physicists taking part in the heavy-ion data-taking and analysis. Three new CMS meeting room will be equipped for videoconferencing in early 2012: 40/5B-08, 42/R-031, and 28/S-029. The CMS-TV service showing LHC Page 1, CMS Page 1, etc. (http://cmsdoc.cern.ch/cmscc/projector/index.jsp) is now also available for mobile devices: http://cern.ch/mcmstv. Figure 12: Screenshots of CMS-TV for mobile devices Information Systems CMS has a new web site: (http://cern.ch/cms) using a modern web Content Management System to ensure content and links are managed and updated easily and coherently. It covers all CMS sub-projects and groups, replacing the iCMS internal pages. It also incorporates the existing CMS public web site (http:/...

  8. COMMUNICATIONS GROUP

    L. Taylor

    2012-01-01

      Outreach and Education We are fortunate that our research has captured the public imagination, even though this inevitably puts us under the global media spotlight, as we saw with the Higgs seminar at CERN in December, which had 110,000 distinct webcast viewers. The media interest was huge with 71 media organisations registering to come to CERN to cover the Higgs seminar, which was followed by a press briefing with the DG and Spokespersons. This event resulted in about 2,000 generally positive stories in the global media. For this seminar, the CMS Communications Group prepared up-to-date news and public material, including links to the CMS results, animations and event displays [http://cern.ch/go/Ch8thttp://cern.ch/go/Ch8t]. There were 44,000 page-views on the CMS public website, with the Higgs news article being by far the most popular item. CMS event displays from iSpy are fast becoming the iconic media images, featuring on numerous major news outlets (BBC, CNN, MSN...) as well as in the sci...

  9. Surgical treatment of the squamous cell carcinoma of tongue and floor of mouth: pos-operative radiotherapy effect; Tratamento cirurgico do carcinoma epidermoide de lingua e soalho de boca localmente avancado: efeito da radioterapia pos-operatoria

    Amar, Ali; Curioni, Otavio Alberto; Higuchi, Sergio T.; Rapoport, Abrao [Hospital Heliopolis (HOSPHEL), Sao Paulo, SP (Brazil). Dept. de Cirurgia da Cabeca e Pescoco e Otorrinolaringologia]. E-mail: lalitos@terra.com.br

    2003-08-01

    Assessment of the postoperative irradiation effectiveness for improvement local control of squamous cell carcinoma of tongue and floor of the mouth in stages III and IV. Study Design: clinical retrospective. Material and Method: a retrospective case-series of 72 patients with squamous cell carcinoma of tongue and floor of mouth who underwent surgery. The local control rate was assessed in front of stage, surgical margins and postoperative radiotherapy. Results: local recurrences were diagnosed in 28 (38%) patients. Only T stage and lymph node metastases were related to recurrences in the primary site. Control of disease in the primary site was achieved in 80% of pn patients and postoperative radiotherapy didn't show any effect in this group. Conclusion: advanced local disease without lymph node metastases can be treated with surgery only. (author)

  10. Francis Bacon or Diego Velázquez in a dentist’s chair” – pictorial and other kinds of quotations as an addition to a disintegrating life

    Arent van Nieukerken

    2014-01-01

    Full Text Available The mature poetry of Tadeusz Różewicz seems to be at odds with both modernist and postmodern literary tenets. It undeniably makes abundant use of intertextuality (including self-quotations, but in spite of this [post]modernist tendency it does resist self-referential impersonality. Różewicz again immerses allusions to images, texts and other artifacts – which, according to formalist and structuralist interpretations, should disengage themselves from an artist’s biography in order to achieve aesthetic autonomy – in the current of life, devoid of an innate sense and always identical to itself. In fact, life cannot be apprehended by art, and precisely, Różewicz tries to thematize this impossibility by producing texts or rather poetical acts that could be classified as self-effacing artifacts. He even succeeded in discrediting the modernist epiphany (which has a double status, i.e. as a poetical device and a window on the transcendent by replacing it with loquacious anticlimaxes. The fragmentary, disintegrating form of his later poetry (the long poem “Francis Bacon or Diego Velázquez in a dentist’s chair” is a perfect – or rather consciously imperfect – implementation of this form does not pretend to be a representation of a human being’s disintegrating existence. This poetry is, above all, an existential act, or – in other words – a performance, and not a self-sufficient work of art.

  11. Which finite simple groups are unit groups?

    Davis, Christopher James; Occhipinti, Tommy

    2014-01-01

    We prove that if G is a finite simple group which is the unit group of a ring, then G is isomorphic to either (a) a cyclic group of order 2; (b) a cyclic group of prime order 2^k −1 for some k; or (c) a projective special linear group PSLn(F2) for some n ≥ 3. Moreover, these groups do all occur a...

  12. Group Cohesion in Experiential Growth Groups

    Steen, Sam; Vasserman-Stokes, Elaina; Vannatta, Rachel

    2014-01-01

    This article explores the effect of web-based journaling on changes in group cohesion within experiential growth groups. Master's students were divided into 2 groups. Both used a web-based platform to journal after each session; however, only 1 of the groups was able to read each other's journals. Quantitative data collected before and…

  13. How to Get from Cupertino to Boca Raton.

    Troxel, Duane K.; Chiavacci, Jim

    1985-01-01

    Describes seven methods to transfer data from Apple computer disks to IBM computer disks and vice versa: print out data and retype; use a commercial software package, optical-character reader, homemade cable, or modem to pass or transfer data directly; pay commercial data-transfer service; or store files on mainframe and download. (MBR)

  14. Group Work Publication-1991.

    Zimpfer, David G.

    1992-01-01

    Lists 21 new publications in group work, of which 9 are reviewed. Those discussed include publications on group counseling and psychotherapy, structured groups, support groups, psychodrama, and social group work. (Author/NB)

  15. Quantum isometry groups

    Jyotishman Bhowmick

    2015-11-07

    Nov 7, 2015 ... Classical. Quantum. Background. Compact Hausdorff space. Unital C∗ algebra. Gelfand-Naimark. Compact Group. Compact Quantum Group. Woronowicz. Group Action. Coaction. Woronowicz. Riemannian manifold. Spectral triple. Connes. Isometry group. Quantum Isometry Group. To be discussed.

  16. Group typicality, group loyalty and cognitive development.

    Patterson, Meagan M

    2014-09-01

    Over the course of childhood, children's thinking about social groups changes in a variety of ways. Developmental Subjective Group Dynamics (DSGD) theory emphasizes children's understanding of the importance of conforming to group norms. Abrams et al.'s study, which uses DSGD theory as a framework, demonstrates the social cognitive skills underlying young elementary school children's thinking about group norms. Future research on children's thinking about groups and group norms should explore additional elements of this topic, including aspects of typicality beyond loyalty. © 2014 The British Psychological Society.

  17. PERSONALIDADE E BOCA A BOCA: PROPENSÃO AO ENVIO E RECEBIMENTO DE INFORMAÇÕES

    Kenny Basso

    2013-10-01

    Full Text Available This article aims to assess the connection between personality traits and willingness to word of mouth. By means of structural equation modeling, it was found that the sending of information was significantly preceded by amiability, emotional instability, and consciousness. The receiving of information was significantly preceded by emotional instability and consciousness. In the academic context, this study contributes to the understanding of connections between personality and sending and receiving of information by consumers, by empirically testing a model that makes the junction between psychological constructs with marketing constructs. At the managerial level, this study contributes to the understanding of consumer behavior and provides evidence for decision making when the intention is to prevent negative word of mouth or to instigate positive word of mouth.

  18. As celebrações nas igrejas da ordem terceira de São Francisco: festas e cultura entre os seculares franciscanos no Império português, século XVIII (The celebrations in the churches of the Third Ord. of St. Francis - DOI: 10.5752/P.2175-5841.2011v9n21p306

    Juliana de Mello Moraes

    2011-07-01

    Full Text Available Resumo As festas, durante o século XVIII, desempenhavam um importante papel no cotidiano das associações de leigos e religiosas. As ordens terceiras franciscanas organizavam distintas celebrações no intuito de promover a instituição no campo religioso local, difundir suas devoções e, ao mesmo tempo, ampliar o seu recrutamento. Este artigo analisa alguns elementos constituintes das celebrações realizadas pelas ordens terceiras de São Francisco em diferentes cidades do império português (Braga e São Paulo, visando compreender o significado e a valorização atribuídos às celebrações no interior das igrejas por essas agremiações. Para realizar esse estudo foram utilizados, principalmente, os livros contábeis das instituições com o objetivo de vislumbrar o investimento nas celebrações e as suas características particulares. A partir das informações compulsadas constata-se um dispêndio avultado com as cerimônias e com a manutenção do culto pelas ordens terceiras franciscanas, evidenciando a importância dedicada por essas associações às celebrações e às festas executadas em seus templos. Palavras-chave: ordem terceira de São Francisco; festa; império português.             Abstract The festivals, during the eighteenth century, played an important role in the daily religious and lay associations. The Third Orders of St. Francis organized distinct celebrations in order to promote the institution in the local religious field, spread their devotions, and at the same time broaden their recruitment. This article examines some elements of the celebrations held by the Third Orders of St. Francis in different cities of the Portuguese empire (Braga and São Paulo, aiming to understand the meaning and value attributed to the celebrations inside the churches by these associations. To perform this study were primarily used the accounting books of the institutions in order to glimpse the investment in the

  19. AREVA group overview; Presentation du groupe AREVA

    NONE

    2002-02-08

    This document presents the Group Areva, a world nuclear industry leader, from a financial holding company to an industrial group, operating in two businesses: the nuclear energy and the components. The structure and the market of the group are discussed, as the financial assets. (A.L.B.)

  20. Overgroups of root groups in classical groups

    Aschbacher, Michael

    2016-01-01

    The author extends results of McLaughlin and Kantor on overgroups of long root subgroups and long root elements in finite classical groups. In particular he determines the maximal subgroups of this form. He also determines the maximal overgroups of short root subgroups in finite classical groups and the maximal overgroups in finite orthogonal groups of c-root subgroups.

  1. Interagency mechanical operations group numerical systems group

    NONE

    1997-09-01

    This report consists of the minutes of the May 20-21, 1971 meeting of the Interagency Mechanical Operations Group (IMOG) Numerical Systems Group. This group looks at issues related to numerical control in the machining industry. Items discussed related to the use of CAD and CAM, EIA standards, data links, and numerical control.

  2. Confiabilidade e validade das Declarações de Óbito por câncer de boca no Município de Teresina, Piauí, Brasil, no período de 2004 e 2005 Reliability and validity of death certificates specifying oral cancer as cause of death in Teresina, Piauí State, Brazil, 2004-2005

    Luciana Tolstenko Nogueira

    2009-02-01

    Full Text Available A política de saúde brasileira depende da precisão dos dados contidos no sistema de informação em saúde. Com objetivo de avaliar a confiabilidade e validade da causa básica de morte por uma neoplasia específica, no Município de Teresina, Piauí, Brasil, foram utilizadas todas as Declarações de Óbito (DO que possuíam como causa básica de morte o câncer de boca nos anos de 2004 e 2005, contabilizando um total de 23 DO. Elas foram submetidas à nova codificação da causa básica mediante utilização de formulário direcionado à coleta de dados clínicos e de exames complementares para a confirmação do diagnóstico nos prontuários médicos. O diagnóstico foi confirmado pelo exame histopatológico e história clínica. Observou-se uma concordância simples de 91,3% e coeficiente kappa de 0,84. O valor preditivo positivo correspondeu a 90,9%. Assim, pode-se afirmar que as referidas estatísticas de mortalidade são válidas e confiáveis. Este estudo teve como limitação possíveis sub-registros de casos que tiveram como causa básica de morte a referida patologia, visto que tais dados não constam no sistema de informação em mortalidade de Teresina.Brazilian health policy depends on the accuracy of data in the health information system. This study aimed to assess the reliability and validity of data on underlying cause of death due to a specific neoplasm in the Municipality of Teresina, Piauí State, Brazil, based on all the death certificates from 2004 and 2005 that reported oral cancer as the underlying cause of death (total of 23 death certificates. The death certificates were recoded for underlying cause of death by using a form targeted at collecting clinical and laboratory data to confirm the medical diagnosis on patient charts. Diagnosis was confirmed by histopathologic examination and clinical history. Simple agreement was 91.3%, kappa coefficient 0.84, and positive predictive value 90.9%. Based on the findings, the

  3. Theory of Lie groups

    Chevalley, Claude

    2018-01-01

    The standard text on the subject for many years, this introductory treatment covers classical linear groups, topological groups, manifolds, analytic groups, differential calculus of Cartan, and compact Lie groups and their representations. 1946 edition.

  4. Introduction to Sporadic Groups

    Luis J. Boya

    2011-01-01

    Full Text Available This is an introduction to finite simple groups, in particular sporadic groups, intended for physicists. After a short review of group theory, we enumerate the 1+1+16=18 families of finite simple groups, as an introduction to the sporadic groups. These are described next, in three levels of increasing complexity, plus the six isolated ''pariah'' groups. The (old five Mathieu groups make up the first, smallest order level. The seven groups related to the Leech lattice, including the three Conway groups, constitute the second level. The third and highest level contains the Monster group M, plus seven other related groups. Next a brief mention is made of the remaining six pariah groups, thus completing the 5+7+8+6=26 sporadic groups. The review ends up with a brief discussion of a few of physical applications of finite groups in physics, including a couple of recent examples which use sporadic groups.

  5. Dvorak. Concerto pour violoncelle / Francis Dresel

    Dresel, Francis

    1992-01-01

    Uuest heliplaadist "Dvorak. Concerto pour violoncelle; Schumann: Concerto pour violoncelle. Orchestre Symphonique d'Estonie, Orchestre Symphonique de la Radio TV d'URSS, Neeme Järvi" Vogue "Archives Sovietiques" 651033 1978

  6. Francis Bacon On Understanding, Reason and Rhetoric

    Wallace, Karl R.

    1971-01-01

    Bacon's views of the faculties of understanding and reason are presented and explained in reference to Baconian rhetoric. Understanding, Rhetoric, Insinuative and Imaginative Reason are defined. (Author/MS)

  7. Erwin Schroedinger, Francis Crick and epigenetic stability

    Ogryzko Vasily V

    2008-04-01

    Full Text Available Abstract Schroedinger's book 'What is Life?' is widely credited for having played a crucial role in development of molecular and cellular biology. My essay revisits the issues raised by this book from the modern perspective of epigenetics and systems biology. I contrast two classes of potential mechanisms of epigenetic stability: 'epigenetic templating' and 'systems biology' approaches, and consider them from the point of view expressed by Schroedinger. I also discuss how quantum entanglement, a nonclassical feature of quantum mechanics, can help to address the 'problem of small numbers' that led Schroedinger to promote the idea of a molecular code-script for explaining the stability of biological order.

  8. Hydraulic design development of Xiluodu Francis turbine

    Wang, Y L; Li, G Y; Shi, Q H; Wang, Z N

    2012-01-01

    Hydraulic optimization design with CFD (Computational Fluid Dynamics) method, hydraulic optimization measures and model test results in the hydraulic development of Xiluodu hydropower station by DFEM (Dongfang Electric Machinery) of DEC (Dongfang Electric Corporation) of China were analyzed in this paper. The hydraulic development conditions of turbine, selection of design parameter, comparison of geometric parameters and optimization measure of turbine flow components were expatiated. And the measures of improving turbine hydraulic performance and the results of model turbine acceptance experiment were discussed in details.

  9. Dr. Francis Collins Is New NIH Director

    ... Ph.D., a physician and geneticist, is the new Director of the National Institutes of Health (NIH), part of the U.S. Department of Health and Human Services. President Barack Obama nominated Dr. Collins, who served as Director of ...

  10. Iraan Suurbritannia vastu : kes paindus? / Francis Fukuyama

    Fukuyama, Francis

    2007-01-01

    Ilmunud ka: Postimees : na russkom jazõke 17. apr. lk. 7. Iraani sisepoliitikast seoses 15 Briti mereväejalaväelase arreteerimise ja vabastamisega, Iraani probleemist Islami Revolutsioonilise Kaardiväe (IRGC või Pasradan) ja sellega liidusuhetes olevate institutsioonidega nagu Basj sõjaväeline rühmitus. Autori arvates tahtsid mõned Iraani rühmitused teravdada vastasseisu Suurbritannia ja USA-ga

  11. Ajalugu ajaloo lõpus / Francis Fukuyama

    Fukuyama, Francis

    2007-01-01

    Ilmunud ka: Molodjozh Estonii 3. apr. lk. 13. Autor käsitleb USA presidendi George W. Bushi põhjendusi sissetungil Iraaki. Ta ütleb, et ammu enne liberaalset demokraatiat peab olemas olema funktsioneeriv riik. Demokraatlikke ümberkorraldusi peavad juhtima ühiskonnad, mis ise tahavad demokraatiat, välised jõud saavad kaasa aidata, aga sunduslik režiimimuutus pole kunagi olnud demokraatiasse siirdumise võti

  12. Erwin Schroedinger, Francis Crick and epigenetic stability.

    Ogryzko, Vasily V

    2008-04-17

    Schroedinger's book 'What is Life?' is widely credited for having played a crucial role in development of molecular and cellular biology. My essay revisits the issues raised by this book from the modern perspective of epigenetics and systems biology. I contrast two classes of potential mechanisms of epigenetic stability: 'epigenetic templating' and 'systems biology' approaches, and consider them from the point of view expressed by Schroedinger. I also discuss how quantum entanglement, a nonclassical feature of quantum mechanics, can help to address the 'problem of small numbers' that led Schroedinger to promote the idea of a molecular code-script for explaining the stability of biological order.

  13. Kunstnik avaldas kaaluta olekus austust Francis Baconile

    2008-01-01

    Projekti "teha kunsti ebapraktilistes kohtades" raames tegid Londoni kunstnikud Nasser Azam ja Lyn Hagan kunsti paraboloidsel spetsiaallennul kaaluta olekus. Hagan filmis kassi ja hiirt ning Azam lõpetas kuus õlimaali

  14. St Francis Nursing Home, Kilkerrin, Ballinasloe, Galway.

    Donnelly, Vidis

    2011-11-10

    Abstract Background There is some evidence that when mental health commitment hearings are held in accordance with therapeutic jurisprudence principles they are perceived as less coercive, and more just in their procedures leading to improved treatment adherence and fewer hospital readmissions. This suggests an effect of the hearing on therapeutic relationships. We compared working alliance and interpersonal trust in clinicians and forensic patients, whose continued detentions were reviewed by two different legal review bodies according to their legal category. Methods The hearings were rated as positive or negative by patients and treating psychiatrists using the MacArthur scales for perceived coercion, perceived procedural justice (legal and medical) and for the impact of the hearing. We rated Global assessment of Function (GAF), Positive and Negative Symptom Scale (PANSS), Working Alliance Inventory (WAI) and Interpersonal Trust in Physician (ITP) scales six months before the hearing and repeated the WAI and ITP two weeks before and two weeks after the hearing, for 75 of 83 patients in a forensic medium and high secure hospital. Results Psychiatrists agreed with patients regarding the rating of hearings. Patients rated civil hearings (MHTs) more negatively than hearings under insanity legislation (MHRBs). Those reviewed by MHTs had lower scores for WAI and ITP. However, post-hearing WAI and ITP scores were not different from baseline and pre-hearing scores. Using the receiver operating characteristic, baseline WAI and ITP scores predicted how patients would rate the hearings, as did baseline GAF and PANSS scores. Conclusions There was no evidence that positively perceived hearings improved WAI or ITP, but some evidence showed that negatively perceived hearings worsened them. Concentrating on functional recovery and symptom remission remains the best strategy for improved therapeutic relationships.

  15. Group Work: How to Use Groups Effectively

    Burke, Alison

    2011-01-01

    Many students cringe and groan when told that they will need to work in a group. However, group work has been found to be good for students and good for teachers. Employers want college graduates to have developed teamwork skills. Additionally, students who participate in collaborative learning get better grades, are more satisfied with their…

  16. Free Boolean Topological Groups

    Ol’ga Sipacheva

    2015-11-01

    Full Text Available Known and new results on free Boolean topological groups are collected. An account of the properties that these groups share with free or free Abelian topological groups and properties specific to free Boolean groups is given. Special emphasis is placed on the application of set-theoretic methods to the study of Boolean topological groups.

  17. Small Group Research

    McGrath, Joseph E.

    1978-01-01

    Summarizes research on small group processes by giving a comprehensive account of the types of variables primarily studied in the laboratory. These include group structure, group composition, group size, and group relations. Considers effects of power, leadership, conformity to social norms, and role relationships. (Author/AV)

  18. Geometric group theory

    Druţu, Cornelia

    2018-01-01

    The key idea in geometric group theory is to study infinite groups by endowing them with a metric and treating them as geometric spaces. This applies to many groups naturally appearing in topology, geometry, and algebra, such as fundamental groups of manifolds, groups of matrices with integer coefficients, etc. The primary focus of this book is to cover the foundations of geometric group theory, including coarse topology, ultralimits and asymptotic cones, hyperbolic groups, isoperimetric inequalities, growth of groups, amenability, Kazhdan's Property (T) and the Haagerup property, as well as their characterizations in terms of group actions on median spaces and spaces with walls. The book contains proofs of several fundamental results of geometric group theory, such as Gromov's theorem on groups of polynomial growth, Tits's alternative, Stallings's theorem on ends of groups, Dunwoody's accessibility theorem, the Mostow Rigidity Theorem, and quasiisometric rigidity theorems of Tukia and Schwartz. This is the f...

  19. Profinite graphs and groups

    Ribes, Luis

    2017-01-01

    This book offers a detailed introduction to graph theoretic methods in profinite groups and applications to abstract groups. It is the first to provide a comprehensive treatment of the subject. The author begins by carefully developing relevant notions in topology, profinite groups and homology, including free products of profinite groups, cohomological methods in profinite groups, and fixed points of automorphisms of free pro-p groups. The final part of the book is dedicated to applications of the profinite theory to abstract groups, with sections on finitely generated subgroups of free groups, separability conditions in free and amalgamated products, and algorithms in free groups and finite monoids. Profinite Graphs and Groups will appeal to students and researchers interested in profinite groups, geometric group theory, graphs and connections with the theory of formal languages. A complete reference on the subject, the book includes historical and bibliographical notes as well as a discussion of open quest...

  20. Estimation of production characteristic curves of geothermal wells and of the permeability of rocky formations through one single mass flow-pressure-enthalpy (W-P-h) measurement at the wellhead; Estimacion de curvas caracteristicas de produccion de pozos geotermicos y de permeabilidades de formaciones rocosas a partir de una sola medicion flujo masico-presion- entalpia (W-P-h) a boca de pozo

    L Moya, Sara; Aragon, Alfonso [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1997-12-31

    The proposed methodology described ahead (Moya et al.,1996; Moya et al.,1997a, 1997b and 1997c) simplifies the construction of production characteristic curves of geothermal wells and of its associated thermal productivity, in requiring one single measurement of mass flow-pressure-enthalpy (W-P-h) at the wellhead. Therefore it is an ecological option, technically and economically more feasible. On the other hand, the methodology also allows to diagnose the rocky formation absolute permeability in the well feeding zone. This permeability is usually determined through well bottom pressure tests, than in some cases are difficult to interpret. The permeability inferred by means of the proposed technology represents a complementary tool for these field tests and for the laboratory measurements on drilling cores. [Espanol] La metodologia propuesta que se describe a continuacion [Moya et al., 1995d; Moya et al., 1996; Moya et al., 1997a, 1997b y 1997c] simplifica la construccion de curvas caracteristicas de produccion de pozos geotermicos y de su productividad termica asociada al requerir solo una medicion de flujo masico-presion-entalpia (W-P-h) a boca de pozo. Es por tanto una alternativa ecologica, tecnica y economicamente mas factible. Por otra parte, la metodologia tambien permite diagnosticar el valor de la permeabilidad absoluta de la formacion rocosa en la zona de alimentacion al pozo. Esta permeabilidad se determina usualmente a partir de pruebas de presion a fondo de pozo que en algunos casos son dificiles de interpretar. La permeabilidad inferida mediante la metodologia propuesta representa una herramienta complementaria a estas pruebas de campo y a las mediciones de laboratorio sobre nucleos de perforacion.

  1. Estimation of production characteristic curves of geothermal wells and of the permeability of rocky formations through one single mass flow-pressure-enthalpy (W-P-h) measurement at the wellhead; Estimacion de curvas caracteristicas de produccion de pozos geotermicos y de permeabilidades de formaciones rocosas a partir de una sola medicion flujo masico-presion- entalpia (W-P-h) a boca de pozo

    L Moya, Sara; Aragon, Alfonso [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-12-31

    The proposed methodology described ahead (Moya et al.,1996; Moya et al.,1997a, 1997b and 1997c) simplifies the construction of production characteristic curves of geothermal wells and of its associated thermal productivity, in requiring one single measurement of mass flow-pressure-enthalpy (W-P-h) at the wellhead. Therefore it is an ecological option, technically and economically more feasible. On the other hand, the methodology also allows to diagnose the rocky formation absolute permeability in the well feeding zone. This permeability is usually determined through well bottom pressure tests, than in some cases are difficult to interpret. The permeability inferred by means of the proposed technology represents a complementary tool for these field tests and for the laboratory measurements on drilling cores. [Espanol] La metodologia propuesta que se describe a continuacion [Moya et al., 1995d; Moya et al., 1996; Moya et al., 1997a, 1997b y 1997c] simplifica la construccion de curvas caracteristicas de produccion de pozos geotermicos y de su productividad termica asociada al requerir solo una medicion de flujo masico-presion-entalpia (W-P-h) a boca de pozo. Es por tanto una alternativa ecologica, tecnica y economicamente mas factible. Por otra parte, la metodologia tambien permite diagnosticar el valor de la permeabilidad absoluta de la formacion rocosa en la zona de alimentacion al pozo. Esta permeabilidad se determina usualmente a partir de pruebas de presion a fondo de pozo que en algunos casos son dificiles de interpretar. La permeabilidad inferida mediante la metodologia propuesta representa una herramienta complementaria a estas pruebas de campo y a las mediciones de laboratorio sobre nucleos de perforacion.

  2. Group purchasing: an overview.

    Wetrich, J G

    1987-07-01

    The various types and operational methods of purchasing groups are described, and evaluation of groups is discussed. Since group purchasing is increasing in popularity as a method of controlling drug costs, community and hospital pharmacy managers may need to evaluate various groups to determine the appropriateness of their services. Groups are categorized as independent, system based, or alliance or association based. Instead of "purchasing," some groups develop contracts for hospitals, which then purchase directly from the vendor. Aside from this basic difference between groups that purchase and groups that contract, comparisons among groups are difficult because of the wide variation in sizes and services. Competition developing from diversification among groups has led to "super groups," formed from local and regional groups. In evaluating groups, advantages and disadvantages germane to accomplishing the member's objectives must be considered. To ensure a group's success, members must be committed and support the group's philosophies; hospital pharmacists must help to establish a strong formulary system. To select vendors, groups should develop formal qualification and selection criteria and should not base a decision solely on price. The method of solicitation (bidding or negotiating), as well as the role of the prime vendor, should be studied. Legal implications of group purchasing, especially in the areas of administrative fees and drug diversion, must also be considered. The most advantageous group for each organization will include members with common missions and will be able to implement strategies for future success.

  3. Ordered groups and infinite permutation groups

    1996-01-01

    The subjects of ordered groups and of infinite permutation groups have long en­ joyed a symbiotic relationship. Although the two subjects come from very different sources, they have in certain ways come together, and each has derived considerable benefit from the other. My own personal contact with this interaction began in 1961. I had done Ph. D. work on sequence convergence in totally ordered groups under the direction of Paul Conrad. In the process, I had encountered "pseudo-convergent" sequences in an ordered group G, which are like Cauchy sequences, except that the differences be­ tween terms of large index approach not 0 but a convex subgroup G of G. If G is normal, then such sequences are conveniently described as Cauchy sequences in the quotient ordered group GIG. If G is not normal, of course GIG has no group structure, though it is still a totally ordered set. The best that can be said is that the elements of G permute GIG in an order-preserving fashion. In independent investigations around that t...

  4. ALIGNMENTS OF GROUP GALAXIES WITH NEIGHBORING GROUPS

    Wang Yougang; Chen Xuelei; Park, Changbom; Yang Xiaohu; Choi, Yun-Young

    2009-01-01

    Using a sample of galaxy groups found in the Sloan Digital Sky Survey Data Release 4, we measure the following four types of alignment signals: (1) the alignment between the distributions of the satellites of each group relative to the direction of the nearest neighbor group (NNG); (2) the alignment between the major axis direction of the central galaxy of the host group (HG) and the direction of the NNG; (3) the alignment between the major axes of the central galaxies of the HG and the NNG; and (4) the alignment between the major axes of the satellites of the HG and the direction of the NNG. We find strong signal of alignment between the satellite distribution and the orientation of central galaxy relative to the direction of the NNG, even when the NNG is located beyond 3r vir of the host group. The major axis of the central galaxy of the HG is aligned with the direction of the NNG. The alignment signals are more prominent for groups that are more massive and with early-type central galaxies. We also find that there is a preference for the two major axes of the central galaxies of the HG and NNG to be parallel for the system with both early central galaxies, however, not for the systems with both late-type central galaxies. For the orientation of satellite galaxies, we do not find any significant alignment signals relative to the direction of the NNG. From these four types of alignment measurements, we conclude that the large-scale environment traced by the nearby group affects primarily the shape of the host dark matter halo, and hence also affects the distribution of satellite galaxies and the orientation of central galaxies. In addition, the NNG directly affects the distribution of the satellite galaxies by inducing asymmetric alignment signals, and the NNG at very small separation may also contribute a second-order impact on the orientation of the central galaxy in the HG.

  5. Citizens' action group

    Andritzky, W.

    1978-01-01

    For the first empirical study of citizens' action groups 331 such groups were consulted. Important information was collected on the following aspects of these groups: their self-image, areas and forms of activities, objectives and their extent, how long the group has existed, successes and failures and their forms of organisation. (orig.) [de

  6. Communication in Organizational Groups

    Monica RADU

    2007-01-01

    Organizational group can be defined as some persons between who exist interactive connections (functional, communication, affective, normative type). Classification of these groups can reflect the dimension, type of relationship or type of rules included. Organizational groups and their influence over the individual efficiency and the efficiency of the entire group are interconnected. Spontaneous roles in these groups sustain the structure of the relationship, and the personality of each indi...

  7. [Social crisis, spontaneous groups and group order].

    Edelman, Lucila; Kordon, Diana

    2002-12-01

    Argentina has gone through very difficult times during the last years and, in particularly, new kinds of social practices have emerged in order to cope with the crisis. This situation demands and urges a new type of reflection upon the double role of groups, as tools to transform reality and as a way to elaborate those processes regarding subjectivity. In this paper we analyse some topics regarding the groupal field (considering spontaneous groups as well as groupal devices that allow to elaborate the crisis). We consider social bond to be the condition of possibility for the existence of the psyche and of time continuity, and that it also makes possible personal and social elaboration of trauma, crisis and social catastrophe. We develop some aspects of an specific device (the reflection group), which we have already depicted in another moment, showing it's usefulness to cope with social crisis and to promote the subjective elaboration of crisis.

  8. Introduction to topological groups

    Husain, Taqdir

    2018-01-01

    Concise treatment covers semitopological groups, locally compact groups, Harr measure, and duality theory and some of its applications. The volume concludes with a chapter that introduces Banach algebras. 1966 edition.

  9. MSUD Family Support Group

    ... The Treatment Of MSUD The MSUD Family Support Group has provided funds to Buck Institute for its ... of the membership of the MSUD Family Support Group, research for improved treatments and potential cure was ...

  10. Nilpotent -local finite groups

    Cantarero, José; Scherer, Jérôme; Viruel, Antonio

    2014-10-01

    We provide characterizations of -nilpotency for fusion systems and -local finite groups that are inspired by known result for finite groups. In particular, we generalize criteria by Atiyah, Brunetti, Frobenius, Quillen, Stammbach and Tate.

  11. UPIN Group File

    U.S. Department of Health & Human Services — The Group Unique Physician Identifier Number (UPIN) File is the business entity file that contains the group practice UPIN and descriptive information. It does NOT...

  12. Group Decision Process Support

    Gøtze, John; Hijikata, Masao

    1997-01-01

    Introducing the notion of Group Decision Process Support Systems (GDPSS) to traditional decision-support theorists.......Introducing the notion of Group Decision Process Support Systems (GDPSS) to traditional decision-support theorists....

  13. Gestalt Interactional Groups

    Harman, Robert L.; Franklin, Richard W.

    1975-01-01

    Gestalt therapy in groups is not limited to individual work in the presence of an audience. Describes several ways to involve gestalt groups interactionally. Interactions described focus on learning by doing and discovering, and are noninterpretive. (Author/EJT)

  14. Group B streptococcus - pregnancy

    ... medlineplus.gov/ency/patientinstructions/000511.htm Group B streptococcus - pregnancy To use the sharing features on this page, please enable JavaScript. Group B streptococcus (GBS) is a type of bacteria that some ...

  15. Multicultural group work

    Hansen, Annette Skovsted

    2014-01-01

    Motivation for the activity I use this strategy for forming groups to ensure diverse/multicultural groups that combine a variety of different strengths and resources based on student's academic, disciplinary, linguistic, national, personal and work backgrounds.......Motivation for the activity I use this strategy for forming groups to ensure diverse/multicultural groups that combine a variety of different strengths and resources based on student's academic, disciplinary, linguistic, national, personal and work backgrounds....

  16. The Areva Group; Le groupe Areva

    NONE

    2004-08-01

    This document provides information on the Areva Group, a world nuclear industry leader, offering solutions for nuclear power generation, electricity transmission and distribution and interconnect systems to the telecommunications, computer and automotive markets. It presents successively the front end division including the group business lines involved in producing nuclear fuel for electric power generation (uranium mining, concentration, conversion and enrichment and nuclear fuel fabrication); the reactors and services division which designs and builds PWR, BWR and research reactors; the back end division which encompasses the management of the fuel that has been used in nuclear power plants; the transmission and distribution division which provides products, systems and services to the medium and high voltage energy markets; the connectors division which designs and manufactures electrical, electronic and optical connectors, flexible micro circuitry and interconnection systems. Areva is implemented in Europe, north and south america, africa and asia-pacific. (A.L.B.)

  17. Exploring Cryogenic Focused Ion Beam Milling as a Group III-V Device Fabrication Tool

    2013-09-01

    boiling, triple , and critical points of the elements” in CRC Handbook of Chemistry and Physics, 92nd ed., Boca Raton, FL: CRC press, 2011-2012, p. 4...The most widely used ion source in FIB instruments is a gallium (Ga) liquid metal ion source (LMIS) [4]. Gallium is attractive as an ion source...Figure 3b. EDS spectra were captured at different points across the patterned region of the room temperature milled sample, as indicated in Figure 4

  18. Groups, combinatorics and geometry

    Ivanov, A A; Saxl, J

    2003-01-01

    Over the past 20 years, the theory of groups in particular simplegroups, finite and algebraic has influenced a number of diverseareas of mathematics. Such areas include topics where groups have beentraditionally applied, such as algebraic combinatorics, finitegeometries, Galois theory and permutation groups, as well as severalmore recent developments.

  19. Working Group 7 Summary

    Nagaitsev S.; Berg J.

    2012-06-10

    The primary subject of working group 7 at the 2012 Advanced Accelerator Concepts Workshop was muon accelerators for a muon collider or neutrino factory. Additionally, this working group included topics that did not fit well into other working groups. Two subjects were discussed by more than one speaker: lattices to create a perfectly integrable nonlinear lattice, and a Penning trap to create antihydrogen.

  20. AREVA group overview

    2002-01-01

    This document presents the Group Areva, a world nuclear industry leader, from a financial holding company to an industrial group, operating in two businesses: the nuclear energy and the components. The structure and the market of the group are discussed, as the financial assets. (A.L.B.)

  1. Group Psychotherapy in Denmark.

    Jørgensen, Lars Bo; Thygesen, Bente; Aagaard, Søren

    2015-10-01

    This is a short article on the history and training standards in the Institute of Group Analysis in Copenhagen (IGA-CPH). We describe theoretical orientations and influences in the long-term training program and new initiatives, like courses in mentalization-based group treatment and a dynamic short-term group therapy course, as well as research in group psychotherapy in Denmark. Some group analytic initiatives in relation to social issues and social welfare are presented, as well as initiatives concerning the school system and unemployment.

  2. Group theory I essentials

    Milewski, Emil G

    2012-01-01

    REA's Essentials provide quick and easy access to critical information in a variety of different fields, ranging from the most basic to the most advanced. As its name implies, these concise, comprehensive study guides summarize the essentials of the field covered. Essentials are helpful when preparing for exams, doing homework and will remain a lasting reference source for students, teachers, and professionals. Group Theory I includes sets and mapping, groupoids and semi-groups, groups, isomorphisms and homomorphisms, cyclic groups, the Sylow theorems, and finite p-groups.

  3. Lectures on Chevalley groups

    Steinberg, Robert

    2016-01-01

    Robert Steinberg's Lectures on Chevalley Groups were delivered and written during the author's sabbatical visit to Yale University in the 1967-1968 academic year. The work presents the status of the theory of Chevalley groups as it was in the mid-1960s. Much of this material was instrumental in many areas of mathematics, in particular in the theory of algebraic groups and in the subsequent classification of finite groups. This posthumous edition incorporates additions and corrections prepared by the author during his retirement, including a new introductory chapter. A bibliography and editorial notes have also been added. This is a great unsurpassed introduction to the subject of Chevalley groups that influenced generations of mathematicians. I would recommend it to anybody whose interests include group theory. -Efim Zelmanov, University of California, San Diego Robert Steinberg's lectures on Chevalley groups were given at Yale University in 1967. The notes for the lectures contain a wonderful exposition of ...

  4. E-groups training

    HR Department

    2012-01-01

    There will be an e-groups training course on 16 March 2012 which will cover the main e-groups functionalities i.e.: creating and managing e-groups, difference between static and dynamic e-groups, configuring posting restrictions and archives, examples of where e-groups can be used in daily work. Even if you have already worked with e-groups, this may be a good opportunity to learn about the best practices and security related recommendations when using e-groups. You can find more details as well as enrolment form for the training (it’s free) here. The number of places is limited, so enrolling early is recommended.   Technical Training Tel. 72844

  5. Group Psychotherapy in Italy.

    Giannone, Francesca; Giordano, Cecilia; Di Blasi, Maria

    2015-10-01

    This article describes the history and the prevailing orientations of group psychotherapy in Italy (psychoanalytically oriented, psychodrama, CBT groups) and particularly group analysis. Provided free of charge by the Italian health system, group psychotherapy is growing, but its expansion is patchy. The main pathways of Italian training in the different group psychotherapy orientations are also presented. Clinical-theoretical elaboration on self development, psychopathology related to group experiences, and the methodological attention paid to objectives and methods in different clinical groups are issues related to group therapy in Italy. Difficulties in the relationship between research and clinical practice are discussed, as well as the empirical research network that tries to bridge the gap between research and clinical work in group psychotherapy. The economic crisis in Italy has led to massive cuts in health care and to an increasing demand for some forms of psychological treatment. For these reasons, and because of its positive cost-benefit ratio, group psychotherapy is now considered an important tool in the national health care system to expand the clinical response to different forms of psychological distress.

  6. Geometric group theory

    Bestvina, Mladen; Vogtmann, Karen

    2014-01-01

    Geometric group theory refers to the study of discrete groups using tools from topology, geometry, dynamics and analysis. The field is evolving very rapidly and the present volume provides an introduction to and overview of various topics which have played critical roles in this evolution. The book contains lecture notes from courses given at the Park City Math Institute on Geometric Group Theory. The institute consists of a set of intensive short courses offered by leaders in the field, designed to introduce students to exciting, current research in mathematics. These lectures do not duplicate standard courses available elsewhere. The courses begin at an introductory level suitable for graduate students and lead up to currently active topics of research. The articles in this volume include introductions to CAT(0) cube complexes and groups, to modern small cancellation theory, to isometry groups of general CAT(0) spaces, and a discussion of nilpotent genus in the context of mapping class groups and CAT(0) gro...

  7. CLASSIFICATION OF CRIMINAL GROUPS

    Natalia Romanova

    2013-01-01

    New types of criminal groups are emerging in modern society.  These types have their special criminal subculture. The research objective is to develop new parameters of classification of modern criminal groups, create a new typology of criminal groups and identify some features of their subculture. Research methodology is based on the system approach that includes using the method of analysis of documentary sources (materials of a criminal case), method of conversations with themembers of the...

  8. Group therapy for adolescents

    Nada Hribar

    2001-01-01

    The group included adolescents from secondary school and some students. The group had weekly sessions or twice on mounth. The adolescents had varied simptoms: depressive, anxiety, psychosomatic disorders, learning difficulties, cunduct problems. All of adolescents were common on many problems in social interactions. The goal of therapeutic work were: to increase assertiveness skills and to reduce the anxious in social situations. The adolescents in group raised a self-esteem and developed som...

  9. Presentations of groups

    Johnson, D L

    1997-01-01

    The aim of this book is to provide an introduction to combinatorial group theory. Any reader who has completed first courses in linear algebra, group theory and ring theory will find this book accessible. The emphasis is on computational techniques but rigorous proofs of all theorems are supplied. This new edition has been revised throughout, including new exercises and an additional chapter on proving that certain groups are infinite.

  10. Group-Server Queues

    Li, Quan-Lin; Ma, Jing-Yu; Xie, Mingzhou; Xia, Li

    2017-01-01

    By analyzing energy-efficient management of data centers, this paper proposes and develops a class of interesting {\\it Group-Server Queues}, and establishes two representative group-server queues through loss networks and impatient customers, respectively. Furthermore, such two group-server queues are given model descriptions and necessary interpretation. Also, simple mathematical discussion is provided, and simulations are made to study the expected queue lengths, the expected sojourn times ...

  11. Environmental groups in politics

    Lowe, P.; Goyder, J.

    1983-01-01

    The subject is covered in chapters, entitled: introduction; (Part I) the environmental movement (environmental groups and the attentive public; the episodic development of the environmental movement; the underlying values of environmentalism; the roots of environmental concern; the social limits to growth; elite manipulation of values); the organisation of environmental groups; environmental groups in national politics; environmental groups in local politics; (Part II) the Henley Society; Friends of the Earth; the National Trust; the Royal Society for Nature Conservation; the European Environmental Bureau. (U.K.)

  12. Complex quantum groups

    Drabant, B.; Schlieker, M.

    1993-01-01

    The complex quantum groups are constructed. They are q-deformations of the real Lie groups which are obtained as the complex groups corresponding to the Lie algebras of type A n-1 , B n , C n . Following the ideas of Faddeev, Reshetikhin and Takhtajan Hopf algebras of regular functionals U R for these complexified quantum groups are constructed. One has thus in particular found a construction scheme for the q-Lorentz algebra to be identified as U(sl q (2,C). (orig.)

  13. Explosive Technology Group

    Federal Laboratory Consortium — The Explosive Technology Group (ETG) provides diverse technical expertise and an agile, integrated approach to solve complex challenges for all classes of energetic...

  14. Study Groups in Denmark

    Hjorth, Poul G.

    2007-01-01

    Since 1998 European Study Groups have been held in Denmark, and Danish companies from LEGO and NOVO to very small high-tech firms have participated. I briefly describe the history, the organisation and the format of the Danish Study Groups, and highlight a few problem solutions.......Since 1998 European Study Groups have been held in Denmark, and Danish companies from LEGO and NOVO to very small high-tech firms have participated. I briefly describe the history, the organisation and the format of the Danish Study Groups, and highlight a few problem solutions....

  15. Lie groups for pedestrians

    Lipkin, Harry J

    2002-01-01

    According to the author of this concise, high-level study, physicists often shy away from group theory, perhaps because they are unsure which parts of the subject belong to the physicist and which belong to the mathematician. However, it is possible for physicists to understand and use many techniques which have a group theoretical basis without necessarily understanding all of group theory. This book is designed to familiarize physicists with those techniques. Specifically, the author aims to show how the well-known methods of angular momentum algebra can be extended to treat other Lie group

  16. The normal holonomy group

    Olmos, C.

    1990-05-01

    The restricted holonomy group of a Riemannian manifold is a compact Lie group and its representation on the tangent space is a product of irreducible representations and a trivial one. Each one of the non-trivial factors is either an orthogonal representation of a connected compact Lie group which acts transitively on the unit sphere or it is the isotropy representation of a single Riemannian symmetric space of rank ≥ 2. We prove that, all these properties are also true for the representation on the normal space of the restricted normal holonomy group of any submanifold of a space of constant curvature. 4 refs

  17. Trajectory grouping structure

    Maike Buchin

    2015-03-01

    Full Text Available The collective motion of a set of moving entities like people, birds, or other animals, is characterized by groups arising, merging, splitting, and ending. Given the trajectories of these entities, we define and model a structure that captures all of such changes using the Reeb graph, a concept from topology. The trajectory grouping structure has three natural parameters that allow more global views of the data in group size, group duration, and entity inter-distance. We prove complexity bounds on the maximum number of maximal groups that can be present, and give algorithms to compute the grouping structure efficiently. We also study how the trajectory grouping structure can be made robust, that is, how brief interruptions of groups can be disregarded in the global structure, adding a notion of persistence to the structure. Furthermore, we showcase the results of experiments using data generated by the NetLogo flocking model and from the Starkey project. The Starkey data describe the movement of elk, deer, and cattle. Although there is no ground truth for the grouping structure in this data, the experiments show that the trajectory grouping structure is plausible and has the desired effects when changing the essential parameters. Our research provides the first complete study of trajectory group evolvement, including combinatorial,algorithmic, and experimental results.

  18. Computational methods working group

    Gabriel, T.A.

    1997-09-01

    During the Cold Moderator Workshop several working groups were established including one to discuss calculational methods. The charge for this working group was to identify problems in theory, data, program execution, etc., and to suggest solutions considering both deterministic and stochastic methods including acceleration procedures.

  19. GroupFinder

    Bøgh, Kenneth Sejdenfaden; Skovsgaard, Anders; Jensen, Christian S.

    2013-01-01

    . Such groups are relevant to users who wish to conveniently explore several options before making a decision such as to purchase a specific product. Specifically, we demonstrate a practical proposal for finding top-k PoI groups in response to a query. We show how problem parameter settings can be mapped...

  20. Toleration, Groups, and Multiculturalism

    Lægaard, Sune

    2014-01-01

    have the ability to interfere with the group’s activities, an object of dislike or disapproval, an agent enjoying non-interference or a moral patient. This means that 'toleration of groups' can mean quite different things depending on the exact meaning of 'group' in relation to each component...

  1. Group B Strep Infection

    ... IV) to kill the germs. If you take antibiotics while you’re in labor, the chances are very good that your baby won’t get this infection. What if my baby has group B strep? If your baby gets group B strep, he or she will be treated with IV antibiotics to kill the bacteria. Your baby will stay ...

  2. Group Process as Drama.

    McLeod, John

    1984-01-01

    Suggests that drama, as well as training or therapy, may be employed as a useful research and practice paradigm in working with small groups. The implications of this view for group development as a whole, and for member and leader participation, are explored. (JAC)

  3. Group Work. Research Brief

    Walker, Karen

    2010-01-01

    According to Johnson and Johnson, group work helps increase student retention and satisfaction, develops strong oral communication and social skills, as well as higher self-esteem (University of Minnesota, n.d.). Group work, when planned and implemented deliberately and thoughtfully helps students develop cognitive and leadership skills as well as…

  4. Physically detached 'compact groups'

    Hernquist, Lars; Katz, Neal; Weinberg, David H.

    1995-01-01

    A small fraction of galaxies appear to reside in dense compact groups, whose inferred crossing times are much shorter than a Hubble time. These short crossing times have led to considerable disagreement among researchers attempting to deduce the dynamical state of these systems. In this paper, we suggest that many of the observed groups are not physically bound but are chance projections of galaxies well separated along the line of sight. Unlike earlier similar proposals, ours does not require that the galaxies in the compact group be members of a more diffuse, but physically bound entity. The probability of physically separated galaxies projecting into an apparent compact group is nonnegligible if most galaxies are distributed in thin filaments. We illustrate this general point with a specific example: a simulation of a cold dark matter universe, in which hydrodynamic effects are included to identify galaxies. The simulated galaxy distribution is filamentary and end-on views of these filaments produce apparent galaxy associations that have sizes and velocity dispersions similar to those of observed compact groups. The frequency of such projections is sufficient, in principle, to explain the observed space density of groups in the Hickson catalog. We discuss the implications of our proposal for the formation and evolution of groups and elliptical galaxies. The proposal can be tested by using redshift-independent distance estimators to measure the line-of-sight spatial extent of nearby compact groups.

  5. Introduction to quantum groups

    Sudbery, A.

    1996-01-01

    These pedagogical lectures contain some motivation for the study of quantum groups; a definition of ''quasi triangular Hopf algebra'' with explanations of all the concepts required to build it up; descriptions of quantised universal enveloping algebras and the quantum double; and an account of quantised function algebras and the action of quantum groups on quantum spaces. (author)

  6. Beam dynamics group summary

    Peggs, S.

    1994-01-01

    This paper summarizes the activities of the beam dynamics working group of the LHC Collective Effects Workshop that was held in Montreux in 1994. It reviews the presentations that were made to the group, the discussions that ensued, and the consensuses that evolved

  7. Our Deming Users' Group.

    Dinklocker, Christina

    1992-01-01

    After training in the Total Quality Management concept, a suburban Ohio school district created a Deming Users' Group to link agencies, individuals, and ideas. The group has facilitated ongoing school/business collaboration, networking among individuals from diverse school systems, mentoring and cooperative learning activities, and resource…

  8. Asymmetry within social groups

    Barker, Jessie; Loope, Kevin J.; Reeve, H. Kern

    2016-01-01

    Social animals vary in their ability to compete with group members over shared resources and also vary in their cooperative efforts to produce these resources. Competition among groups can promote within-group cooperation, but many existing models of intergroup cooperation do not explicitly account...... of two roles, with relative competitive efficiency and the number of individuals varying between roles. Players in each role make simultaneous, coevolving decisions. The model predicts that although intergroup competition increases cooperative contributions to group resources by both roles, contributions...... are predominantly from individuals in the less competitively efficient role, whereas individuals in the more competitively efficient role generally gain the larger share of these resources. When asymmetry in relative competitive efficiency is greater, a group's per capita cooperation (averaged across both roles...

  9. Supervision and group dynamics

    Hansen, Søren; Jensen, Lars Peter

    2004-01-01

     An important aspect of the problem based and project organized study at Aalborg University is the supervision of the project groups. At the basic education (first year) it is stated in the curriculum that part of the supervisors' job is to deal with group dynamics. This is due to the experience...... that many students are having difficulties with practical issues such as collaboration, communication, and project management. Most supervisors either ignore this demand, because they do not find it important or they find it frustrating, because they do not know, how to supervise group dynamics...... as well as at Aalborg University. The first visible result has been participating supervisors telling us that the course has inspired them to try supervising group dynamics in the future. This paper will explore some aspects of supervising group dynamics as well as, how to develop the Aalborg model...

  10. Summary of group discussions

    2009-01-01

    A key aspect of the workshop was the interaction and exchange of ideas and information among the 40 participants. To facilitate this activity the workshop participants were divided into five discussions groups. These groups reviewed selected subjects and reported back to the main body with summaries of their considerations. Over the 3 days the 5 discussion groups were requested to focus on the following subjects: the characteristics and capabilities of 'good' organisations; how to ensure sufficient resources; how to ensure competence within the organisation; how to demonstrate organisational suitability; the regulatory oversight processes - including their strengths and weaknesses. A list of the related questions that were provided to the discussion groups can be found in Appendix 3. Also included in Appendix 3 are copies of the slides the groups prepared that summarised their considerations

  11. Natural analogue working group

    Come, B.; Chapman, N.

    1986-01-01

    A Natural Analogue Working Group was established by the Commission of the European Communities in 1985. The purpose of this group is to bring together modellers with earth scientists and others, so that maximum benefit can be obtained from natural analogue studies with a view to safe geological disposal of radioactive waste. The first meeting of this group was held in Brussels from November 5 to 7, 1985. The discussions mainly concerned the identification of the modellers' needs and of the earth scientists' capacity to provide for them. Following the debates, a written statement was produced by the Group; this document forms the core of the present Report. Notes and outlines of many of the presentations made are grouped in four appendixes. The valuable contribution of all those involved in the meeting is gratefully acknowledged

  12. Ordered groups and topology

    Clay, Adam

    2016-01-01

    This book deals with the connections between topology and ordered groups. It begins with a self-contained introduction to orderable groups and from there explores the interactions between orderability and objects in low-dimensional topology, such as knot theory, braid groups, and 3-manifolds, as well as groups of homeomorphisms and other topological structures. The book also addresses recent applications of orderability in the studies of codimension-one foliations and Heegaard-Floer homology. The use of topological methods in proving algebraic results is another feature of the book. The book was written to serve both as a textbook for graduate students, containing many exercises, and as a reference for researchers in topology, algebra, and dynamical systems. A basic background in group theory and topology is the only prerequisite for the reader.

  13. Group prenatal care.

    Mazzoni, Sara E; Carter, Ebony B

    2017-06-01

    Patients participating in group prenatal care gather together with women of similar gestational ages and 2 providers who cofacilitate an educational session after a brief medical assessment. The model was first described in the 1990s by a midwife for low-risk patients and is now practiced by midwives and physicians for both low-risk patients and some high-risk patients, such as those with diabetes. The majority of literature on group prenatal care uses CenteringPregnancy, the most popular model. The first randomized controlled trial of CenteringPregnancy showed that it reduced the risk of preterm birth in low-risk women. However, recent meta-analyses have shown similar rates of preterm birth, low birthweight, and neonatal intensive care unit admission between women participating in group prenatal care and individual prenatal care. There may be subgroups, such as African Americans, who benefit from this type of prenatal care with significantly lower rates of preterm birth. Group prenatal care seems to result in increased patient satisfaction and knowledge and use of postpartum family planning as well as improved weight gain parameters. The literature is inconclusive regarding breast-feeding, stress, depression, and positive health behaviors, although it is theorized that group prenatal care positively affects these outcomes. It is unclear whether group prenatal care results in cost savings, although it may in large-volume practices if each group consists of approximately 8-10 women. Group prenatal care requires a significant paradigm shift. It can be difficult to implement and sustain. More randomized trials are needed to ascertain the true benefits of the model, best practices for implementation, and subgroups who may benefit most from this innovative way to provide prenatal care. In short, group prenatal care is an innovative and promising model with comparable pregnancy outcomes to individual prenatal care in the general population and improved outcomes in some

  14. Francis Fukuyama : demokraadid oleksid pidanud juba ammu võitma / Francis Fukuyama

    Fukuyama, Francis

    2008-01-01

    Politoloog usub, et George W. Bushi valitsuse unilateraalsus oli lihtsalt tema valitsusaja fenomen, president Barack Obama valitsus pühenduks põhimõtteliselt multilateraalsusele. Autori hinnangul on Gruusia ja Ukraina NATO-liikmesuse tagant torkimine vastutustundetu, sest nende osas on 5. artikli kohustusi võimatu täita. NATO ainuke õige vastus Venemaa tegevusele Gruusias oleks kaasata Soome. Terrorismivastasest sõjast

  15. Critical groups - basic concepts

    Carter, M.W.

    1992-01-01

    The potential exposure pathways from the land application site to man are presented. It is emphasised that the critical group is not necessary the population group closest to the source. It could be the group impact by the most significant pathways(s). Only by assessing the importance of each of these pathways and then combining them can a proper choice of critical group be made. It would be wrong to select a critical group on the basis that it seems the most probable one, before the pathways have been properly assessed. A calculation in Carter (1983) suggested that for the operating mine site, the annual doses to an Aboriginal person, a service worker and a local housewife, were all about the same and were in the range 0.1 to 0.2 mSv per year. Thus it may be that for the land application area, the critical group turns out to be non-Aboriginal rather than the expected Aboriginal group. 6 refs., 3 figs

  16. Groups - Modular Mathematics Series

    Jordan, David

    1994-01-01

    This text provides an introduction to group theory with an emphasis on clear examples. The authors present groups as naturally occurring structures arising from symmetry in geometrical figures and other mathematical objects. Written in a 'user-friendly' style, where new ideas are always motivated before being fully introduced, the text will help readers to gain confidence and skill in handling group theory notation before progressing on to applying it in complex situations. An ideal companion to any first or second year course on the topic.

  17. Introduction to quantum groups

    Chaichian, Masud

    1996-01-01

    In the past decade there has been an extemely rapid growth in the interest and development of quantum group theory.This book provides students and researchers with a practical introduction to the principal ideas of quantum groups theory and its applications to quantum mechanical and modern field theory problems. It begins with a review of, and introduction to, the mathematical aspects of quantum deformation of classical groups, Lie algebras and related objects (algebras of functions on spaces, differential and integral calculi). In the subsequent chapters the richness of mathematical structure

  18. Group key management

    Dunigan, T.; Cao, C.

    1997-08-01

    This report describes an architecture and implementation for doing group key management over a data communications network. The architecture describes a protocol for establishing a shared encryption key among an authenticated and authorized collection of network entities. Group access requires one or more authorization certificates. The implementation includes a simple public key and certificate infrastructure. Multicast is used for some of the key management messages. An application programming interface multiplexes key management and user application messages. An implementation using the new IP security protocols is postulated. The architecture is compared with other group key management proposals, and the performance and the limitations of the implementation are described.

  19. Group therapy for adolescents

    Nada Hribar

    2001-03-01

    Full Text Available The group included adolescents from secondary school and some students. The group had weekly sessions or twice on mounth. The adolescents had varied simptoms: depressive, anxiety, psychosomatic disorders, learning difficulties, cunduct problems. All of adolescents were common on many problems in social interactions. The goal of therapeutic work were: to increase assertiveness skills and to reduce the anxious in social situations. The adolescents in group raised a self-esteem and developed some assertiveness skills: eye contact" and effective communication skills, persistence, refusing and requesting, giving and receiving critism, etc. The methods of work and techniques were based on principles of cognitive-behaviour therapy.

  20. Matrix groups for undergraduates

    Tapp, Kristopher

    2005-01-01

    Matrix groups touch an enormous spectrum of the mathematical arena. This textbook brings them into the undergraduate curriculum. It makes an excellent one-semester course for students familiar with linear and abstract algebra and prepares them for a graduate course on Lie groups. Matrix Groups for Undergraduates is concrete and example-driven, with geometric motivation and rigorous proofs. The story begins and ends with the rotations of a globe. In between, the author combines rigor and intuition to describe basic objects of Lie theory: Lie algebras, matrix exponentiation, Lie brackets, and maximal tori.

  1. UnitedHealth Group

    UnitedHealth Group provides accessible and affordable services, improved quality of care, coordinated health care efforts, and a supportive environment for shared decision making between patients and their physicians.

  2. Homogeneous group, research, institution

    Francesca Natascia Vasta

    2014-09-01

    Full Text Available The work outlines the complex connection among empiric research, therapeutic programs and host institution. It is considered the current research state in Italy. Italian research field is analyzed and critic data are outlined: lack of results regarding both the therapeutic processes and the effectiveness of eating disorders group analytic treatment. The work investigates on an eating disorders homogeneous group, led into an eating disorder outpatient service. First we present the methodological steps the research is based on including the strong connection among theory and clinical tools. Secondly clinical tools are described and the results commented. Finally, our results suggest the necessity of validating some more specifical hypothesis: verifying the relationship between clinical improvement (sense of exclusion and painful emotions reduction and specific group therapeutic processes; verifying the relationship between depressive feelings, relapses and transition trough a more differentiated groupal field.Keywords: Homogeneous group; Eating disorders; Institutional field; Therapeutic outcome

  3. Color transparency study group

    Appel, J.A.; Pordes, S.; Botts, J.; Bunce, G.; Farrar, G.

    1990-01-01

    The group studied the relatively new notion of color transparency, discussed present experimental evidence for the effect, and explored several ideas for future experiments. This write-up summarizes these discussions. 11 refs., 1 fig

  4. Generalized quantum groups

    Leivo, H.P.

    1992-01-01

    The algebraic approach to quantum groups is generalized to include what may be called an anyonic symmetry, reflecting the appearance of phases more general than ±1 under transposition. (author). 6 refs

  5. Groups – Additive Notation

    Coghetto Roland

    2015-06-01

    Full Text Available We translate the articles covering group theory already available in the Mizar Mathematical Library from multiplicative into additive notation. We adapt the works of Wojciech A. Trybulec [41, 42, 43] and Artur Korniłowicz [25].

  6. Groups – Additive Notation

    Coghetto Roland

    2015-01-01

    We translate the articles covering group theory already available in the Mizar Mathematical Library from multiplicative into additive notation. We adapt the works of Wojciech A. Trybulec [41, 42, 43] and Artur Korniłowicz [25].

  7. Creativity and group innovation

    Nijstad, B.A.; de Dreu, C.K.W.

    2002-01-01

    Comments on M. West's article regarding the validity of an integrative model of creativity and innovation implementation in work groups. Variables affecting the level of team innovation; Relationship between predictors and team innovation; Promotion of constructive conflict.

  8. Truck shovel users group

    Thomas, J. [Surface Mining Association for Research and Technology, AB (Canada)

    2008-07-01

    The Truck Shovel Users Group (TSUG) was developed as part of the Surface Mining Association for Research and Technology (SMART), an association of companies that meet to coordinate technology developments for the mining industry. The TSUG meet regularly to discuss equipment upgrades, maintenance planning systems, and repair techniques. The group strives to maximize the value of its assets through increased safety, equipment performance and productivity. This presentation provided administrative details about the TSUG including contact details and admission costs. It was concluded that members of the group must be employed by companies that use heavy mining equipment, and must also be willing to host meetings, make presentations, and support the common goals of the group. tabs., figs.

  9. The theory of groups

    Hall, Marshall

    2018-01-01

    This 1959 text offers an unsurpassed resource for learning and reviewing the basics of a fundamental and ever-expanding area. "This remarkable book undoubtedly will become a standard text on group theory." - American Scientist.

  10. Radiation Protection Group

    2006-01-01

    The Radioactive Waste Section of the Radiation Protection Group wishes to inform you that the Radioactive Waste Treatment Centre will be closed on the afternoon of Tuesday 19 December 2006. Thank-you for your understanding.

  11. The Military Cooperation Group

    Renzi, Jr, Alfred E

    2006-01-01

    .... This thesis will describe a structure to assist with both those needs. The premise is that an expanded and improved network of US Military Groups is the weapon of choice for the war on terror, and beyond...

  12. Introduction to group theory

    Canals B.

    2012-03-01

    Full Text Available This chapter is a concise mathematical introduction into the algebra of groups. It is build up in the way that definitions are followed by propositions and proofs. The concepts and the terminology introduced here will serve as a basis for the following chapters that deal with group theory in the stricter sense and its application to problems in physics. The mathematical prerequisites are at the bachelor level.1

  13. Groups, rings, modules

    Auslander, Maurice

    2014-01-01

    This classic monograph is geared toward advanced undergraduates and graduate students. The treatment presupposes some familiarity with sets, groups, rings, and vector spaces. The four-part approach begins with examinations of sets and maps, monoids and groups, categories, and rings. The second part explores unique factorization domains, general module theory, semisimple rings and modules, and Artinian rings. Part three's topics include localization and tensor products, principal ideal domains, and applications of fundamental theorem. The fourth and final part covers algebraic field extensions

  14. Focus Group Guide

    2017-07-01

    home for the arrival of school- aged children. TIP: Do not conduct focus groups in a command conference room in the command group area. Doing so...organizational effectiveness and equal opportunity/equal employment opportunity/fair treatment and sexual assault and response factors (which are listed on the... Sexual Harassment (C) Sex Harassment Retaliation (D) Discrimination - Sex (E) Discrimination - Race (F) Discrimination - Disability (G

  15. Choice Shifts in Groups

    Kfir Eliaz; Debraj Ray

    2004-01-01

    The phenomenon of "choice shifts" in group decision-making is fairly ubiquitous in the social psychology literature. Faced with a choice between a ``safe" and ``risky" decision, group members appear to move to one extreme or the other, relative to the choices each member might have made on her own. Both risky and cautious shifts have been identified in different situations. This paper demonstrates that from an individual decision-making perspective, choice shifts may be viewed as a systematic...

  16. Group Capability Model

    Olejarski, Michael; Appleton, Amy; Deltorchio, Stephen

    2009-01-01

    The Group Capability Model (GCM) is a software tool that allows an organization, from first line management to senior executive, to monitor and track the health (capability) of various groups in performing their contractual obligations. GCM calculates a Group Capability Index (GCI) by comparing actual head counts, certifications, and/or skills within a group. The model can also be used to simulate the effects of employee usage, training, and attrition on the GCI. A universal tool and common method was required due to the high risk of losing skills necessary to complete the Space Shuttle Program and meet the needs of the Constellation Program. During this transition from one space vehicle to another, the uncertainty among the critical skilled workforce is high and attrition has the potential to be unmanageable. GCM allows managers to establish requirements for their group in the form of head counts, certification requirements, or skills requirements. GCM then calculates a Group Capability Index (GCI), where a score of 1 indicates that the group is at the appropriate level; anything less than 1 indicates a potential for improvement. This shows the health of a group, both currently and over time. GCM accepts as input head count, certification needs, critical needs, competency needs, and competency critical needs. In addition, team members are categorized by years of experience, percentage of contribution, ex-members and their skills, availability, function, and in-work requirements. Outputs are several reports, including actual vs. required head count, actual vs. required certificates, CGI change over time (by month), and more. The program stores historical data for summary and historical reporting, which is done via an Excel spreadsheet that is color-coded to show health statistics at a glance. GCM has provided the Shuttle Ground Processing team with a quantifiable, repeatable approach to assessing and managing the skills in their organization. They now have a common

  17. Parton Distributions Working Group

    Barbaro, L. de; Keller, S. A.; Kuhlmann, S.; Schellman, H.; Tung, W.-K.

    2000-01-01

    This report summarizes the activities of the Parton Distributions Working Group of the QCD and Weak Boson Physics workshop held in preparation for Run II at the Fermilab Tevatron. The main focus of this working group was to investigate the different issues associated with the development of quantitative tools to estimate parton distribution functions uncertainties. In the conclusion, the authors introduce a Manifesto that describes an optimal method for reporting data

  18. Renormalization Group Theory

    Stephens, C. R.

    2006-01-01

    In this article I give a brief account of the development of research in the Renormalization Group in Mexico, paying particular attention to novel conceptual and technical developments associated with the tool itself, rather than applications of standard Renormalization Group techniques. Some highlights include the development of new methods for understanding and analysing two extreme regimes of great interest in quantum field theory -- the ''high temperature'' regime and the Regge regime

  19. Independents' group posts loss

    Sanders, V.; Price, R.B.

    1992-01-01

    Low oil gas prices and special charges caused the group of 50 U.S. independent producers Oil and Gas Journal tracks to post a combined loss in first half 1992. The group logged a net loss of $53 million in the first half compared with net earnings of $354 million in first half 1991, when higher oil prices during the Persian Gulf crisis buoyed earnings in spite of crude oil and natural gas production declines. The combined loss in the first half follows a 45% drop in the group's earnings in 1991 and compares with the OGJ group of integrated oil companies whose first half 1992 income fell 47% from the prior year. Special charges, generally related to asset writedowns, accounted for most of the almost $560 million in losses posted by about the third of the group. Nerco Oil and Gas Inc., Vancouver, Wash., alone accounted for almost half that total with charges related to an asset writedown of $238 million in the first quarter. Despite the poor first half performance, the outlook is bright for sharply improved group earnings in the second half, assuming reasonably healthy oil and gas prices and increased production resulting from acquisitions and in response to those prices

  20. Assessment of Group Preferences and Group Uncertainty for Decision Making

    1976-06-01

    the individ- uals. decision making , group judgments should be preferred to individual judgments if obtaining group judgments costs more. -26- -YI IV... decision making group . IV. A. 3. Aggregation using conjugate distribution. Arvther procedure for combining indivi(jai probability judgments into a group...statisticized group group decision making group judgment subjective probability Delphi method expected utility nominal group 20. ABSTRACT (Continue on

  1. Cyclic Soft Groups and Their Applications on Groups

    Hacı Aktaş

    2014-01-01

    Full Text Available In crisp environment the notions of order of group and cyclic group are well known due to many applications. In this paper, we introduce order of the soft groups, power of the soft sets, power of the soft groups, and cyclic soft group on a group. We also investigate the relationship between cyclic soft groups and classical groups.

  2. Coordinating Group report

    1994-01-01

    In December 1992, western governors and four federal agencies established a Federal Advisory Committee to Develop On-site Innovative Technologies for Environmental Restoration and Waste Management (the DOIT Committee). The purpose of the Committee is to advise the federal government on ways to improve waste cleanup technology development and the cleanup of federal sites in the West. The Committee directed in January 1993 that information be collected from a wide range of potential stakeholders and that innovative technology candidate projects be identified, organized, set in motion, and evaluated to test new partnerships, regulatory approaches, and technologies which will lead to improve site cleanup. Five working groups were organized, one to develop broad project selection and evaluation criteria and four to focus on specific contaminant problems. A Coordinating Group comprised of working group spokesmen and federal and state representatives, was set up to plan and organize the routine functioning of these working groups. The working groups were charged with defining particular contaminant problems; identifying shortcomings in technology development, stakeholder involvement, regulatory review, and commercialization which impede the resolution of these problems; and identifying candidate sites or technologies which could serve as regional innovative demonstration projects to test new approaches to overcome the shortcomings. This report from the Coordinating Group to the DOIT Committee highlights the key findings and opportunities uncovered by these fact-finding working groups. It provides a basis from which recommendations from the DOIT Committee to the federal government can be made. It also includes observations from two public roundtables, one on commercialization and another on regulatory and institutional barriers impeding technology development and cleanup

  3. Linear algebraic groups

    Springer, T A

    1998-01-01

    "[The first] ten chapters...are an efficient, accessible, and self-contained introduction to affine algebraic groups over an algebraically closed field. The author includes exercises and the book is certainly usable by graduate students as a text or for self-study...the author [has a] student-friendly style… [The following] seven chapters... would also be a good introduction to rationality issues for algebraic groups. A number of results from the literature…appear for the first time in a text." –Mathematical Reviews (Review of the Second Edition) "This book is a completely new version of the first edition. The aim of the old book was to present the theory of linear algebraic groups over an algebraically closed field. Reading that book, many people entered the research field of linear algebraic groups. The present book has a wider scope. Its aim is to treat the theory of linear algebraic groups over arbitrary fields. Again, the author keeps the treatment of prerequisites self-contained. The material of t...

  4. Summary report: injection group

    Simpson, J.; Ankenbrandt, C.; Brown, B.

    1984-01-01

    The injector group attempted to define and address several problem areas related to the SSC injector as defined in the Reference Design Study (RDS). It also considered the topic of machine utilization, particularly the question of test beam requirements. Details of the work are given in individually contributed papers, but the general concerns and consensus of the group are presented within this note. The group recognized that the injector as outlined in the RDS was developed primarily for costing estimates. As such, it was not necessarily well optimized from the standpoint of insuring the required beam properties for the SSC. On the other hand, considering the extraordinary short time in which the RDS was prepared, it is an impressive document and a good basis from which to work. Because the documented SSC performance goals are ambitious, the group sought an injector solution which would more likely guarantee that SSC performance not be limited by its injectors. As will be seen, this leads to a somewhat different solution than that described in the RDS. Furthermore, it is the consensus of the group that the new, conservative approach represents only a modest cost increase of the overall project well worth the confidence gained and the risks avoided

  5. Matrix groups for undergraduates

    Tapp, Kristopher

    2016-01-01

    Matrix groups touch an enormous spectrum of the mathematical arena. This textbook brings them into the undergraduate curriculum. It makes an excellent one-semester course for students familiar with linear and abstract algebra and prepares them for a graduate course on Lie groups. Matrix Groups for Undergraduates is concrete and example-driven, with geometric motivation and rigorous proofs. The story begins and ends with the rotations of a globe. In between, the author combines rigor and intuition to describe the basic objects of Lie theory: Lie algebras, matrix exponentiation, Lie brackets, maximal tori, homogeneous spaces, and roots. This second edition includes two new chapters that allow for an easier transition to the general theory of Lie groups. From reviews of the First Edition: This book could be used as an excellent textbook for a one semester course at university and it will prepare students for a graduate course on Lie groups, Lie algebras, etc. … The book combines an intuitive style of writing w...

  6. Frailty Across Age Groups.

    Pérez-Zepeda, M U; Ávila-Funes, J A; Gutiérrez-Robledo, L M; García-Peña, C

    2016-01-01

    The implementation of an aging biomarker into clinical practice is under debate. The Frailty Index is a model of deficit accumulation and has shown to accurately capture frailty in older adults, thus bridging biological with clinical practice. To describe the association of socio-demographic characteristics and the Frailty Index in different age groups (from 20 to over one hundred years) in a representative sample of Mexican subjects. Cross-sectional analysis. Nationwide and population-representative survey. Adults 20-years and older interviewed during the last Mexican National Health and Nutrition Survey (2012). A 30-item Frailty Index following standard construction was developed. Multi-level regression models were performed to test the associations of the Frailty Index with multiple socio-demographic characteristics across age groups. A total of 29,504 subjects was analyzed. The 30-item Frailty Index showed the highest scores in the older age groups, especially in women. No sociodemographic variable was associated with the Frailty Index in all the studied age groups. However, employment, economic income, and smoking status were more consistently found across age groups. To our knowledge, this is the first report describing the Frailty Index in a representative large sample of a Latin American country. Increasing age and gender were closely associated with a higher score.

  7. Illinois Wind Workers Group

    David G. Loomis

    2012-05-28

    The Illinois Wind Working Group (IWWG) was founded in 2006 with about 15 members. It has grown to over 200 members today representing all aspects of the wind industry across the State of Illinois. In 2008, the IWWG developed a strategic plan to give direction to the group and its activities. The strategic plan identifies ways to address critical market barriers to the further penetration of wind. The key to addressing these market barriers is public education and outreach. Since Illinois has a restructured electricity market, utilities no longer have a strong control over the addition of new capacity within the state. Instead, market acceptance depends on willing landowners to lease land and willing county officials to site wind farms. Many times these groups are uninformed about the benefits of wind energy and unfamiliar with the process. Therefore, many of the project objectives focus on conferences, forum, databases and research that will allow these stakeholders to make well-educated decisions.

  8. Focus group discussions

    Hennink, Monique M

    2014-01-01

    The Understanding Research series focuses on the process of writing up social research. The series is broken down into three categories: Understanding Statistics, Understanding Measurement, and Understanding Qualitative Research. The books provide researchers with guides to understanding, writing, and evaluating social research. Each volume demonstrates how research should be represented, including how to write up the methodology as well as the research findings. Each volume also reviews how to appropriately evaluate published research. Focus Group Discussions addresses the challenges associated with conducting and writing focus group research. It provides detailed guidance on the practical and theoretical considerations in conducting focus group discussions including: designing the discussion guide, recruiting participants, training a field team, moderating techniques and ethical considerations. Monique Hennink describes how a methodology section is read and evaluated by others, such as journal reviewers or ...

  9. Bell, group and tangle

    Solomon, A. I.

    2010-01-01

    The 'Bell' of the title refers to bipartite Bell states, and their extensions to, for example, tripartite systems. The 'Group' of the title is the Braid Group in its various representations; while 'Tangle' refers to the property of entanglement which is present in both of these scenarios. The objective of this note is to explore the relation between Quantum Entanglement and Topological Links, and to show that the use of the language of entanglement in both cases is more than one of linguistic analogy.

  10. A Quantum Groups Primer

    Majid, Shahn

    2002-05-01

    Here is a self-contained introduction to quantum groups as algebraic objects. Based on the author's lecture notes for the Part III pure mathematics course at Cambridge University, the book is suitable as a primary text for graduate courses in quantum groups or supplementary reading for modern courses in advanced algebra. The material assumes knowledge of basic and linear algebra. Some familiarity with semisimple Lie algebras would also be helpful. The volume is a primer for mathematicians but it will also be useful for mathematical physicists.

  11. Introduction to quantum groups

    Monteiro, Marco A.R.

    1994-01-01

    An elementary introduction to quantum groups is presented. The example of Universal Enveloping Algebra of deformed SU(2) is analysed in detail. It is also discussed systems made up of bosonic q-oscillators at finite temperature within the formalism of Thermo-Field Dynamics. (author). 39 refs

  12. Lectures on Lie groups

    Hsiang, Wu-Yi

    2017-01-01

    This volume consists of nine lectures on selected topics of Lie group theory. We provide the readers a concise introduction as well as a comprehensive 'tour of revisiting' the remarkable achievements of S Lie, W Killing, É Cartan and H Weyl on structural and classification theory of semi-simple Lie groups, Lie algebras and their representations; and also the wonderful duet of Cartans' theory on Lie groups and symmetric spaces.With the benefit of retrospective hindsight, mainly inspired by the outstanding contribution of H Weyl in the special case of compact connected Lie groups, we develop the above theory via a route quite different from the original methods engaged by most other books.We begin our revisiting with the compact theory which is much simpler than that of the general semi-simple Lie theory; mainly due to the well fittings between the Frobenius-Schur character theory and the maximal tori theorem of É Cartan together with Weyl's reduction (cf. Lectures 1-4). It is a wonderful reality of the Lie t...

  13. Gluten Intolerance Group

    ... Intolerance Group (GIG), the industry leader in the certification of gluten-free products and food services, announced today that a wide ... of gluten-free products. One of the top certification programs in the world, GFCO inspects products and manufacturing facilities for gluten, in an effort ...

  14. With the Radiobiology Group

    CERN PhotoLab

    1980-01-01

    The Radiobiology Group carries out experiments to study the effect of radiation on living cells. The photo shows the apparatus for growing broad beans which have been irradiated by 250 GeV protons. The roots are immersed in a tank of running water (CERN Weekly Bulletin 26 January 1981 and Annual Report 1980 p. 160). Karen Panman, Marilena Streit-Bianchi, Roger Paris.

  15. Group control of elevators

    Umeda, Yasukazu; Hikita, Shiro; Tuji, Sintaro (Mitsubishi Electric Corp., Tokyo (Japan))

    1988-09-05

    Items to be evaluated in the group control of elevators, and a typical control system are described. A new system in which the fuzzy rule base is employed is introduced together with the configuration. The items to be evaluated are waiting time, riding time, accuracy of forecasting, energy saving, and ease of usage. The everage waiting time of less than 20 seconds with less than 3% waiting rate of more than 60 seconds is accepted as a satisfactory service condition. There are many conflicting matters in group-controlling, and the study for the controlling must deal with the optimization of multi-purpose problems. The standards for group-control evaluation differ according to building structures and the tastes of users, and an important problem is where to give emphasis of the evaluation. The TRAFFIC PATTERN LEARNING METHOD has been applied in the system for careful control to accommodate the traffic. No specific function is provided for the evaluation, but the call allocation is made by fuzzy rule-base. The configuration of a new group-control system is introduced. 7 references, 7 figures, 1 table.

  16. Functional Group Analysis.

    Smith, Walter T., Jr.; Patterson, John M.

    1984-01-01

    Literature on analytical methods related to the functional groups of 17 chemical compounds is reviewed. These compounds include acids, acid azides, alcohols, aldehydes, ketones, amino acids, aromatic hydrocarbons, carbodiimides, carbohydrates, ethers, nitro compounds, nitrosamines, organometallic compounds, peroxides, phenols, silicon compounds,…

  17. Moral motivation within groups

    Lee, Romy van der

    2013-01-01

    Morality is of particular importance to people: People want to be considered moral and want to belong to moral groups. Consequently, morality judgments have the potential to motivate individuals to behave in ways that are considered to be ‘good’. In the current dissertation, I examined the impact of

  18. Smoot Group Cosmology

    the Universe About Cosmology Planck Satellite Launched Cosmology Videos Professor George Smoot's group conducts research on the early universe (cosmology) using the Cosmic Microwave Background radiation (CMB science goals regarding cosmology. George Smoot named Director of Korean Cosmology Institute The GRB

  19. Groups and Symmetry

    Home; Journals; Resonance – Journal of Science Education; Volume 4; Issue 10. Groups and Symmetry: A Guide to Discovering Mathematics. Geetha Venkataraman. Book Review Volume 4 Issue 10 October 1999 pp 91-92. Fulltext. Click here to view fulltext PDF. Permanent link:

  20. Public interest group involvement

    Shelley, P.

    1986-01-01

    Including public interest groups in the siting process for nuclear waste disposal facilities is of great importance. Controversial sitings often result in litigation, but involving public interest groups early in the process will lessen the change of this. They act as surrogates for the general public and should be considered as members of the team. It is important to remember though, that all public interest groups are different. In choosing public panels such as public advisory committees, members should not be chosen on the basis of some quota. Opposition groups should not be excluded. Also, it is important to put the right person in charge of the committee. The goal of public involvement is to identify the conflicts. This must be done during the decision process, because conflicts must be known before they can be eliminated. Regarding litigation, it is important to ease through and around legal battles. If the siting process has integrity and a good faith effort has been shown, the court should uphold the effort. In addition, it is important to be negotiable and to eliminate shortcuts