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Sample records for lee francis describes

  1. Francis Moto The aim of this paper is to describe tonal mobility in ...

    African Journals Online (AJOL)

    Francis Moto. The aim of this paper is to describe tonal mobility in. Chichewa. We will establish that the surface positions of. Chichewa tonal contrasts do not always con-espond to their original locations in the underlying structure, but rather that their point of origin may be in preceding syllables, morphemes or even words, ...

  2. Francis Crick, DNA, and the Central Dogma

    Science.gov (United States)

    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)

  3. Francis Picabia hilislooming

    Index Scriptorium Estoniae

    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

  4. Francis Bacon's behavioral psychology.

    Science.gov (United States)

    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.

  5. Mark, Prof. Herman Francis

    Indian Academy of Sciences (India)

    Home; Fellowship. Fellow Profile. Elected: 1949 Honorary. Mark, Prof. Herman Francis. Date of birth: 3 May 1895. Date of death: 6 April 1992. YouTube; Twitter; Facebook; Blog. Academy News. IAS Logo. Theory Of Evolution. Posted on 23 January 2018. Joint Statement by the Three Science Academies of India on the ...

  6. The Francis Crick Institute.

    Science.gov (United States)

    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.

  7. The Earl Lee Street Art Campaign

    Science.gov (United States)

    Bubba

    2013-01-01

    This article describes a catchy phrase with more to its meaning than first view. A slogan "All the girls love Earl Lee," appears in street art around the world. Earl Lee is a lovable, handsome man who owns the fictitious Earl Lube industries. Originally intended to bring a smile to people's faces at a time when there wasn't much to smile…

  8. okoronkwo, ike francis

    African Journals Online (AJOL)

    Valued Acer Customer

    changing needs and aspirations of time and space coordinates is central to the notion of change. Change hence is a .... “Developed in the late „80s by software engineer Tim Berners-Lee at the CERN particle physics lab in Switzerland in ... apprehension to time, space and region demands a re-definition. Artists seizing ...

  9. Crick, Prof. Francis Harry Compton

    Indian Academy of Sciences (India)

    Elected: 1985 Honorary. Crick, Prof. Francis Harry Compton O.M., FRS, Nobel Laureate (Medicine) - 1962. Date of birth: 8 June 1916. Date of death: 29 July 2004. Last known address: The Salk Institute for Biological, Studies, P.O. Box 85800, San Diego, CA 92186-5800, U.S.A.. YouTube; Twitter; Facebook; Blog ...

  10. Francis Crick (1916–2004)

    Indian Academy of Sciences (India)

    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 ...

  11. Francis Howell School District: Lessons About Change from Year-Round Schooling's Best Kept Secret.

    Science.gov (United States)

    Shields, Carolyn; Oberg, Steven

    2000-01-01

    Uses multiple-voices methodology to describe lessons learned during implementation of year-round school calendar at the Francis Howell School District, the first and longest running year-round school in North America. (Contains 25 references.) (PKP)

  12. Lipid composition of lees from Sherry wine.

    Science.gov (United States)

    Gómez, Maria Ester; Igartuburu, José M; Pando, Enrique; Luis, Francisco Rodríguez; Mourente, Gabriel

    2004-07-28

    In this paper, we describe the study and characterization of the lipids from lees of Sherry wine, one of the main byproducts from the wine-making industry in the Jerez/Xeres/Sherry denomination of the origin zone in Jerez de la Frontera, Spain. The lipid content, extractability, classification, fatty acid composition, and its main chemical characteristics have been determined in order to evaluate their potential use as a food or food additive. Copyright 2004 American Chemical Society

  13. Francis Bacon and the Technology of Style.

    Science.gov (United States)

    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)

  14. Ta-Tsing-Leu-Lee

    OpenAIRE

    Staunton, George Thomas

    2017-01-01

    Anastatic reprint of Ta-Tsing-Leu-Lee o Sia Leggi Fondamentali del Codice Penale della China, stampato e promulgato a Pekin coll’autorità di tutti gl’Imperatori Ta-Tsing, della presente dinastìa. Tradotto dal chinese da Giorgio Tommaso Staunton, membro della Società reale di Londra […] Versione italiana […] 3 vols. (Milano: dalla Stamperia di Giovanni Silvestri agli Scalini del Duomo n° 994, 1812), Italian translation of George Thomas Staunton, Ta Tsing Leu Lee; Being the Funda...

  15. Yang-Lee zeros of the Yang-Lee model

    Science.gov (United States)

    Mussardo, G.; Bonsignori, R.; Trombettoni, A.

    2017-12-01

    To understand the distribution of the Yang-Lee zeros in quantum integrable field theories we analyse the simplest of these systems given by the 2D Yang-Lee model. The grand-canonical partition function of this quantum field theory, as a function of the fugacity z and the inverse temperature β, can be computed in terms of the thermodynamics Bethe Ansatz based on its exact S-matrix. We extract the Yang-Lee zeros in the complex plane by using a sequence of polynomials of increasing order N in z which converges to the grand-canonical partition function. We show that these zeros are distributed along curves which are approximate circles as it is also the case of the zeros for purely free theories. There is though an important difference between the interactive theory and the free theories, for the radius of the zeros in the interactive theory goes continuously to zero in the high-temperature limit β → 0 while in the free theories it remains close to 1 even for small values of β, jumping to 0 only at β = 0 .

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

    Science.gov (United States)

    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…

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

    CERN Multimedia

    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.

  18. Characterization of Phenolic Compounds in Wine Lees

    Directory of Open Access Journals (Sweden)

    Ye Zhijing

    2018-03-01

    Full Text Available The effect of vinification techniques on phenolic compounds and antioxidant activity of wine lees are poorly understood. The present study investigated the antioxidant activity of white and red wine lees generated at early fermentation and during aging. In this study, the total phenol content (TPC, total tannin content (TTC, mean degree of polymerization (mDP, and antioxidant activities of five white and eight red wine lees samples from different vinification backgrounds were determined. The results showed that vinification techniques had a significant (p < 0.05 impact on total phenol and tannin content of the samples. White wine lees had high mDP content compared with red ones. Catechin (50–62% and epicatechin contents were the predominant terminal units of polymeric proanthocyanidin extracted from examined samples. Epigallocatechin was the predominant extension unit of white wine lees, whereas epicatechin was the predominant compound in red wine marc. The ORAC (oxygen radical absorbance capacity assay was strongly correlated with the DPPH (α, α-diphenyl-β-picrylhydrazyl assay, and the results showed the strong antioxidant activities associated with red wine lees (PN > 35 mg Trolox/g FDM (PN: Pinot noir lees; FDM: Freeze-dried Material. This study indicates that tannin is one of the major phenolic compounds available in wine lees that can be useful in human and animal health applications.

  19. Tim Berners-Lee during the WSIS

    CERN Multimedia

    Maximilien Brice

    2003-01-01

    Tim Berners-Lee stands in front of the first web server at the Geneva Palexpo during the World Summit on the Information Society (WSIS) in 2003. Tim Berners-Lee developed the first network and server system that lead to the World Wide Web.

  20. Characterization of Phenolic Compounds in Wine Lees.

    Science.gov (United States)

    Zhijing, Ye; Shavandi, Amin; Harrison, Roland; Bekhit, Alaa El-Din A

    2018-03-25

    The effect of vinification techniques on phenolic compounds and antioxidant activity of wine lees are poorly understood. The present study investigated the antioxidant activity of white and red wine lees generated at early fermentation and during aging. In this study, the total phenol content (TPC), total tannin content (TTC), mean degree of polymerization (mDP), and antioxidant activities of five white and eight red wine lees samples from different vinification backgrounds were determined. The results showed that vinification techniques had a significant ( p 35 mg Trolox/g FDM) (PN: Pinot noir lees; FDM: Freeze-dried Material). This study indicates that tannin is one of the major phenolic compounds available in wine lees that can be useful in human and animal health applications.

  1. Homage to Francis Perrin - 1901-1992

    International Nuclear Information System (INIS)

    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

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

    Science.gov (United States)

    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.

  3. Failure analysis of a Francis turbine runner

    Energy Technology Data Exchange (ETDEWEB)

    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.

  4. Failure analysis of a Francis turbine runner

    International Nuclear Information System (INIS)

    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.

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

    Science.gov (United States)

    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.

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

    African Journals Online (AJOL)

    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, ...

  7. The Statecraft of Singapore's Lee Kuan Yew

    National Research Council Canada - National Science Library

    Toh, K

    1996-01-01

    .... The ejection of Singapore from the Federation led Lee to focus on two strategic goals: the survival of Singapore as an independent state while simultaneously pursuing nation-building under the threats of communism and internal ethnic conflicts...

  8. Higher-derivative Lee-Wick unification

    International Nuclear Information System (INIS)

    Carone, Christopher D.

    2009-01-01

    We consider gauge coupling unification in Lee-Wick extensions of the Standard Model that include higher-derivative quadratic terms beyond the minimally required set. We determine how the beta functions are modified when some Standard Model particles have two Lee-Wick partners. We show that gauge coupling unification can be achieved in such models without requiring the introduction of additional fields in the higher-derivative theory and we comment on possible ultraviolet completions.

  9. Francis W. Reichelderfer 1895-1983

    Science.gov (United States)

    Hughes, Patrick

    Francis W. Reichelderfer, who died January 26, 1983, introduced modern forecasting techniques to U.S. military and civilian weather prediction and spearheaded their dissemination throughout the world. When Reichelderfer retired as Chief of the U.S. Weather Bureau in 1963, Secretary of Commerce Luther H. Hodges declared that, “You are leaving a legacy of the world's largest and most sophisticated weather system … During your tour of duty, your leadership and inspiration guided meteorologists throughout the world to work toward the common goal of a truly global weather system.” President Kennedy and former Presidents Truman and Eisenhower sent letters of appreciation. In addition, Reichelderfer received gifts and messages from more than 50 other nations in recognition of his many contributions to the development of modern meteorology. Reichelderfer himself said that he had been fortunate “always to have been in the right place at the right time.”

  10. Use of Awamori-pressed Lees and Tofu Lees as Feed Ingredients for Growing Female Goats

    Directory of Open Access Journals (Sweden)

    Itsuki Nagamine

    2012-12-01

    Full Text Available Okinawan Awamori is produced by fermenting steamed indica rice with black mold, yeast, and water. Awamori-pressed lees is a by-product of the Awamori production process. Tofu lees is a by-product of the Tofu production process. This research consisted of two experiments conducted to elucidate whether or not dried Awamori-pressed lees and Tofu lees can be used as a mixed feed ingredient for raising female goats. In experiment 1, digestion trials were conducted to ascertain the nutritive values of dried Awamori-pressed lees and dried Tofu lees for goats. The digestible crude protein (DCP and total digestible nutrients (TDN contents of dried Awamori-pressed lees and Tofu lees were 22.5%, 22.5% (DCP, and 87.2%, 94.4% (TDN respectively. In experiment 2, 18 female goats (Japanese Saanen×Nubian, three months old, body weight 15.4±0.53 kg were divided into three groups of six animals (control feed group (CFG, Awamori-pressed lees mixed feed group (AMFG, Tofu lees mixed feed group (TMFG. The CFG control used feed containing 20% soybean meal as the main protein source, while the AMFG and TMFG treatments used feed mixed with 20% dried Awamori-pressed lees or dried Tofu lees. The groups were fed mixed feed (volume to provide 100 g/d increase in body weight twice a day (10:00, 16:00. The klein grass hay and water was given ad libitum. The hay intake was measured at 08:00 and 16:00. Body weight and size measurements were taken once a month. At the end of the experiment, a blood sample was drawn from the jugular vein of each animal. The DCP and TDN intakes in AMFG and TMFG showed no significant difference to the CFG. Cumulative measurements of growth in body weight, withers height, chest depth, chest girth, and hip width over the 10 mo period in the AMFG and TMFG were similar to the CFG. By contrast, cumulative growth in body length and hip height in the AMFG and TMFG tended to be larger than the CFG. Cumulative growth in chest width in the AMFG was

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

    Science.gov (United States)

    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.…

  12. Cultural Resource Investigations in the L’Anguille River Basin, Lee, St. Francis, Cross and Poinsett Counties, Arkansas.

    Science.gov (United States)

    1989-01-01

    Davidson 1983 Mapping and Calibration of Modern Pollen-Vegetation Relationships in the Southeastern United States. Review of Palaeobotany and Palynology 39:1...inventory/catalog, state site forms, and other project records that were produced during the investigations. A review of local environmental conditions... PALYNOLOGICAL AND PLANT-MACROFOSSIL ANALYSIS: HOOD LAKE, POINSETI COUNTY, ARKANSAS. 16 (Hazel R. Delcourt, and Paul A. Delcourt) Introduction 16

  13. Francis Goyat kuuleb pühapäeval

    Index Scriptorium Estoniae

    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"

  14. A POÉTICA DE FRANCIS BACON

    Directory of Open Access Journals (Sweden)

    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.

  15. On the linear programming bound for linear Lee codes.

    Science.gov (United States)

    Astola, Helena; Tabus, Ioan

    2016-01-01

    Based on an invariance-type property of the Lee-compositions of a linear Lee code, additional equality constraints can be introduced to the linear programming problem of linear Lee codes. In this paper, we formulate this property in terms of an action of the multiplicative group of the field [Formula: see text] on the set of Lee-compositions. We show some useful properties of certain sums of Lee-numbers, which are the eigenvalues of the Lee association scheme, appearing in the linear programming problem of linear Lee codes. Using the additional equality constraints, we formulate the linear programming problem of linear Lee codes in a very compact form, leading to a fast execution, which allows to efficiently compute the bounds for large parameter values of the linear codes.

  16. Statistical study of some Lee galaxy groups

    Science.gov (United States)

    Mohamed, Sabry A.; Fouad, Ahmed M.

    2017-12-01

    Compact groups of galaxies are systems of small number of galaxies close to each other. They are a good laboratory to study galaxy properties, such as structure, morphology and evolution which are affected by the environment and galaxy interactions. We applied the tree clustering technique (the Euclidean separation distance coefficients) to test the physical reality of groups and used certain criteria (Sabry et al., 2009) depending on the physical attributes of the galaxies. The sample of the data is the quintets groups of Lee compact groups of galaxies (Lee et al., 2004). It is based on a modified version of Hickson's criteria (Hickson, 1982). The results reveal the membership of each galaxy and how it is related to its group. The tables of groups and their members are included. Our results indicates that 12 Groups are real groups with real members while 18 Groups have one galaxy that has attribute discordant and should be discarded from its group.

  17. Instability of the Lee-Wick bounce

    International Nuclear Information System (INIS)

    Karouby, Johanna; Brandenberger, Robert; Qiu, Taotao

    2011-01-01

    It was recently realized [Y. F. Cai, T. t. Qiu, R. Brandenberger, and X. m. Zhang, Phys. Rev. D 80, 023511 (2009).] that a model constructed from a Lee-Wick type scalar field theory yields, at the level of homogeneous and isotropic background cosmology, a bouncing cosmology. However, bouncing cosmologies induced by pressureless matter are in general unstable to the addition of relativistic matter (i.e. radiation). Here we study the possibility of obtaining a bouncing cosmology if we add radiation coupled to the Lee-Wick scalar field. This coupling in principle would allow the energy to flow from radiation to matter, thus providing a drain for the radiation energy. However, we find that it takes an extremely unlikely fine-tuning of the initial phases of the field configurations for a sufficient amount of radiative energy to flow into matter. For general initial conditions, the evolution leads to a singularity rather than a smooth bounce.

  18. Statistical study of some Lee galaxy groups

    Directory of Open Access Journals (Sweden)

    Sabry A. Mohamed

    2017-12-01

    Full Text Available Compact groups of galaxies are systems of small number of galaxies close to each other. They are a good laboratory to study galaxy properties, such as structure, morphology and evolution which are affected by the environment and galaxy interactions. We applied the tree clustering technique (the Euclidean separation distance coefficients to test the physical reality of groups and used certain criteria (Sabry et al., 2009 depending on the physical attributes of the galaxies. The sample of the data is the quintets groups of Lee compact groups of galaxies (Lee et al., 2004. It is based on a modified version of Hickson’s criteria (Hickson, 1982. The results reveal the membership of each galaxy and how it is related to its group. The tables of groups and their members are included.Our results indicates that 12 Groups are real groups with real members while 18 Groups have one galaxy that has attribute discordant and should be discarded from its group. Keywords: Galaxies, Cluster analysis, Galaxy groups, Lee galaxy groups

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

    International Nuclear Information System (INIS)

    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

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

    Science.gov (United States)

    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.

  1. A presença de Francis Bacon na Enciclopedia

    OpenAIRE

    Bruna Torlay Pires

    2008-01-01

    Resumo: Este trabalho procura assinalar traços da filosofia de Francis Bacon na Enciclopédia francesa do século XVIII. Estes traços se manifestam nas teses que defendem o intercurso entre avanço técnico e progresso do conhecimento, e o ideal de ciência como conquista indefinida que escapa ao gênio individual, e sobrevive como patrimônio comum da humanidade. Compreensivamente, mostra que o utilitarismo? de Francis Bacon e dos enciclopedistas na verdade se fundamenta na idéia capital de que a e...

  2. Francis Bacon and the Historiography of Scientific Rhetoric.

    Science.gov (United States)

    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…

  3. 60 years ago, Francis Crick changed the logic of biology.

    Science.gov (United States)

    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.

  4. Binding Cultures: A Symbiotic Vision of Francis Bebey in Agatha ...

    African Journals Online (AJOL)

    Binding Cultures: A Symbiotic Vision of Francis Bebey in Agatha Moudio's Son. Kelvin Ngong Toh. Abstract. No Abstract. LWATI: A Journal of Contemporary Research, 9(3), 126-135, 2012. Full Text: EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · AJOL African Journals Online.

  5. 60 years ago, Francis Crick changed the logic of biology.

    Directory of Open Access Journals (Sweden)

    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.

  6. Taylor and Francis Journals under the critical lens of readability ...

    African Journals Online (AJOL)

    Academic journals are channels through which research findings are presented. They are said to be the most potent means of communication in the academic community; hence, they must be as readable as possible. This paper evaluated the readability of the topmost 11 journals published by the Taylor and Francis group.

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

    Science.gov (United States)

    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…

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

    African Journals Online (AJOL)

    First Lady

    component of swirl applies force on the blades of the rotor and loses its momentum, both linear and angular, producing torque and rotation in the shaft. There are four basic types of turbine (Francis, Kaplan, Pelton and. Turgo) used for hydropower generation (Sabourin et al., 1996). The Awba dam situated near the Faculty of ...

  9. Lee-Yang zeros and large-deviation statistics of a molecular zipper

    Science.gov (United States)

    Deger, Aydin; Brandner, Kay; Flindt, Christian

    2018-01-01

    The complex zeros of partition functions were originally investigated by Lee and Yang to explain the behavior of condensing gases. Since then, Lee-Yang zeros have become a powerful tool to describe phase transitions in interacting systems. Today, Lee-Yang zeros are no longer just a theoretical concept; they have been determined in recent experiments. In one approach, the Lee-Yang zeros are extracted from the high cumulants of thermodynamic observables at finite size. Here we employ this method to investigate a phase transition in a molecular zipper. From the energy fluctuations in small zippers, we can predict the temperature at which a phase transition occurs in the thermodynamic limit. Even when the system does not undergo a sharp transition, the Lee-Yang zeros carry important information about the large-deviation statistics and its symmetry properties. Our work suggests an interesting duality between fluctuations in small systems and their phase behavior in the thermodynamic limit. These predictions may be tested in future experiments.

  10. Deterministic and stochastic trends in the Lee-Carter mortality model

    DEFF Research Database (Denmark)

    Callot, Laurent; Haldrup, Niels; Kallestrup-Lamb, Malene

    2015-01-01

    The Lee and Carter (1992) model assumes that the deterministic and stochastic time series dynamics load with identical weights when describing the development of age-specific mortality rates. Effectively this means that the main characteristics of the model simplify to a random walk model with age...... mortality data. We find empirical evidence that this feature of the Lee–Carter model overly restricts the system dynamics and we suggest to separate the deterministic and stochastic time series components at the benefit of improved fit and forecasting performance. In fact, we find that the classical Lee...

  11. Deterministic and stochastic trends in the Lee-Carter mortality model

    DEFF Research Database (Denmark)

    Callot, Laurent; Haldrup, Niels; Kallestrup-Lamb, Malene

    The Lee and Carter (1992) model assumes that the deterministic and stochastic time series dynamics loads with identical weights when describing the development of age specific mortality rates. Effectively this means that the main characteristics of the model simplifies to a random walk model...... that characterizes mortality data. We find empirical evidence that this feature of the Lee-Carter model overly restricts the system dynamics and we suggest to separate the deterministic and stochastic time series components at the benefit of improved fit and forecasting performance. In fact, we find...

  12. Negative effect of discharging vinification lees on soils.

    Science.gov (United States)

    Moldes, Ana B; Vázquez, Manuel; Domínguez, José M; Díaz-Fierros, Francisco; Barral, María T

    2008-09-01

    In this work, vinification lees from Galicia (Spain) were chemically analysed and compared with the composition of vinification lees from other regions and residues. Moreover, vinification lees were submitted to biological test employing cress, spring barley and ryegrass seeds. The evaluated vinification lees were rich in nutrients that are essential for plants, like P (2,520 mg kg(-1)), K (36,738 mg kg(-1)) and Mg (462 mg kg(-1)), but have low pH (3.9) and high C/N ratio. However, when vinification lees were submitted to biological tests, no germination was observed for garden cress and ryegrass seeds and almost no germination for spring barley seeds, showing the negative effect of discharging lees on crop fields.

  13. Thomas George Lee - Implantation and early development of North American rodents

    DEFF Research Database (Denmark)

    Carter, Anthony Michael

    2011-01-01

    A century ago Thomas G. Lee amassed an unparalleled collection of developmental series of North American rodents such as the thirteen-lined ground squirrel, the Plains pocket gopher and Merriam's kangaroo rat. He was the first to describe the initial attachment of the squirrel blastocyst...

  14. Water quality and ecology of the River Lee: mass balance and a review of temporal and spatial data

    Directory of Open Access Journals (Sweden)

    D. L. Snook

    2004-01-01

    Full Text Available A regional overview of the water quality and ecology of the River Lee catchment is presented. Specifically, data describing the chemical, microbiological and macrobiological water quality and fisheries communities have been analysed, based on a division into river, sewage treatment works, fish-farm, lake and industrial samples. Nutrient enrichment and the highest concentrations of metals and micro-organics were found in the urbanised, lower reaches of the Lee and in the Lee Navigation. Average annual concentrations of metals were generally within environmental quality standards although, on many occasions, concentrations of cadmium, copper, lead, mercury and zinc were in excess of the standards. Various organic substances (used as herbicides, fungicides, insecticides, chlorination by-products and industrial solvents were widely detected in the Lee system. Concentrations of ten micro-organic substances were observed in excess of their environmental quality standards, though not in terms of annual averages. Sewage treatment works were the principal point source input of nutrients, metals and micro-organic determinands to the catchment. Diffuse nitrogen sources contributed approximately 60% and 27% of the in-stream load in the upper and lower Lee respectively, whereas approximately 60% and 20% of the in-stream phosphorus load was derived from diffuse sources in the upper and lower Lee. For metals, the most significant source was the urban runoff from North London. In reaches less affected by effluent discharges, diffuse runoff from urban and agricultural areas dominated trends. High microbiological content, observed in the River Lee particularly in urbanised reaches, was far in excess of the EC Bathing Water Directive standards. Water quality issues and degraded habitat in the lower reaches of the Lee has led to impoverished aquatic fauna but, within the mid-catchment reaches and upper agricultural tributaries, less nutrient enrichment and channel

  15. "Muy poco se sabe de los resultados": Francis E. Bond's expedition to the Paria Peninsula and delta of the Orinoco, Venezuela (1911).

    Science.gov (United States)

    Dorr, L J

    2010-01-01

    The natural history expedition of the American banker and stock broker Francis E. Bond and companions to the Paria Peninsula and delta of the Orinoco, Venezuela, in early 1911 is described. Biographical details are provided for the three principles: Francis E. Bond, Stewardson Brown and Thomas S. Gillin. The itinerary of their three and a half month expedition is elaborated, and notes are provided on the collection of plants, animals, and artefacts that they gathered in South America and deposited in the Academy of Natural Sciences of Philadelphia on their return.

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

    International Nuclear Information System (INIS)

    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

  17. 76 FR 41810 - Francis Proposed Low-Effect Habitat Conservation Plan for the Morro Shoulderband Snail, Los Osos...

    Science.gov (United States)

    2011-07-15

    ...We, the U.S. Fish and Wildlife Service (Service), have received an application from Catherine M. and Ronald L. Francis (applicants) for a 5-year incidental take permit under the Endangered Species Act of 1973, as amended (Act). The application addresses the potential for ``take'' of the Federally endangered Morro shoulderband snail (Helminthoglypta walkeriana) incidental to the construction and occupation of a single-family residence on a legal single-family-zoned parcel in the unincorporated community of Los Osos, San Luis Obispo County, California. The applicants would implement a conservation program to minimize and mitigate project activities as described in their low-effect habitat conservation plan. We invite comments from the public on the application, which includes the Francis Low-Effect Habitat Conservation Plan for the Morro Shoulderband Snail (HCP) that has been determined to be eligible for a Categorical Exclusion under the National Environmental Policy Act of 1969, as amended (NEPA).

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

    Directory of Open Access Journals (Sweden)

    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. 

  19. Retrospective: Ivy Lee and the German Dye Trust.

    Science.gov (United States)

    Hainsworth, Brad E.

    1987-01-01

    Examines the relationship between public relations trailblazer Ivy Lee and the German Dye Trust, which became an agent for the policies of Adolf Hitler. Discusses how Lee's efforts to use this relationship to persuade his contacts to influence the Nazi leadership failed because of his formal connection with this group. (JD)

  20. Tim Berners-Lee and Kofi Annan during the WSIS

    CERN Multimedia

    Patrice Loïez

    2003-01-01

    During the 2003 World Summit on the Information Society (WSIS) at Geneva Palexpo, Tim Berners-Lee W3C's director (World Wide Web consortium) was introduced to Kofi Annan, Secretary General of the United Nations. Tim Berners-Lee developed the first network and server system that lead to the World Wide Web.

  1. Tim Berners-Lee and Kofi Annan during the WSIS

    CERN Document Server

    Patrice Loïez

    2003-01-01

    During the 2003 World Summit on the Information Society (WSIS) at Geneva Palexpo, Tim Berners-Lee, W3C's director (World Wide Web consortium) was introduced to Kofi Annan, Secretary General of the United Nations. Tim Berners-Lee developed the first network and server system that lead to the World Wide Web.

  2. Complete synchronization of two Chen-Lee systems

    International Nuclear Information System (INIS)

    Sheu, L-J; Chen, J-H; Chen, H-K; Tam, L-M; Lao, S-K; Chen, W-C; Lin, K-T

    2008-01-01

    This study demonstrates that complete synchronization of two Chen-Lee chaotic systems can be easily achieved. The upper bound of the Chen-Lee chaotic system is estimated numerically. A controller is designed to synchronize two chaotic systems. Sufficient conditions for synchronization are obtained using Lyapunov's direct method. Two numerical examples are presented to verify the proposed synchronization approach

  3. Web Inventor Berners-Lee starts a Blog

    CERN Document Server

    Olson, Parmy

    2005-01-01

    Berners-Lee created what is known today as the World Wide Web. Now, just in time for the Web's 15th anniversary and after taking his proverbial stroll around the global dwelling of cyberspace, Berners-Lee is chatting with the rest of us about what he thinks with a blog

  4. Tim Berners-Lee receives the Millennium Technology Prize

    CERN Multimedia

    2004-01-01

    On 15 April, for his invention of the Web, Tim Berners-Lee was awarded the first ever Millennium Technology Prize by the Finnish Technology Award Foundation, which recognises technological innovations of lasting benefit to society. "Tim Berners-Lee's invention perfectly encapsulates the spirit of the Prize. The Web is encouraging new types of social networks, contributing to transparency and democracy, and opening up new avenues for information management and business development," underlined Pekka Tarjanne, chairman of the jury and former Secretary-General of the International Telecommunication Union (ITU). Tim Berners-Lee is congratulated by Jukka Valtasaari, Finland's Ambassador to the United States. Tim Berners-Lee created the first server, browser and editor, the HTML code, the URL address and the HTTP transmission protocol at CERN in 1990. CERN released the Web into the public domain in 1993. Tim Berners-Lee is currently head of the World Wide Web Consortium, managed by ERCIM (Europe...

  5. Hydraulic design of a low-specific speed Francis runner for a hydraulic cooling tower

    Science.gov (United States)

    Ruan, H.; Luo, X. Q.; Liao, W. L.; Zhao, Y. P.

    2012-11-01

    The air blower in a cooling tower is normally driven by an electromotor, and the electric energy consumed by the electromotor is tremendous. The remaining energy at the outlet of the cooling cycle is considerable. This energy can be utilized to drive a hydraulic turbine and consequently to rotate the air blower. The purpose of this project is to recycle energy, lower energy consumption and reduce pollutant discharge. Firstly, a two-order polynomial is proposed to describe the blade setting angle distribution law along the meridional streamline in the streamline equation. The runner is designed by the point-to-point integration method with a specific blade setting angle distribution. Three different ultra-low-specificspeed Francis runners with different wrap angles are obtained in this method. Secondly, based on CFD numerical simulations, the effects of blade setting angle distribution on pressure coefficient distribution and relative efficiency have been analyzed. Finally, blade angles of inlet and outlet and control coefficients of blade setting angle distribution law are optimal variables, efficiency and minimum pressure are objective functions, adopting NSGA-II algorithm, a multi-objective optimization for ultra-low-specific speed Francis runner is carried out. The obtained results show that the optimal runner has higher efficiency and better cavitation performance.

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

    Directory of Open Access Journals (Sweden)

    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.

  7. Potential of lees from wine, beer and cider manufacturing as a source of economic nutrients: An overview.

    Science.gov (United States)

    Pérez-Bibbins, B; Torrado-Agrasar, A; Salgado, J M; Oliveira, R Pinheiro de Souza; Domínguez, J M

    2015-06-01

    Lees are the wastes generated during the fermentation and aging processes of different industrial activities concerning alcoholic drinks such as wine, cider and beer. They must be conveniently treated to avoid uncontrolled dumping which causes environmental problems due to their high content of phenols, pesticides, heavy metals, and considerable concentrations of nitrogen, phosphate and potassium as well as high organic content. The companies involved must seek alternative environmental and economic physicochemical and biological treatments for their revalorization consisting in the recovery or transformation of the components of the lees into high value-added compounds. After describing the composition of lees and market of wine, beer and cider industries in Spain, this work aims to review the recent applications of wine, beer and cider lees reported in literature, with special attention to the use of lees as an endless sustainable source of nutrients and the production of yeast extract by autolysis or cell disruption. Lees and/or yeast extract can be used as nutritional supplements with potential exploitation in the biotechnological industry for the production of natural compounds such as xylitol, organic acids, and biosurfactants, among others. Copyright © 2015 Elsevier Ltd. All rights reserved.

  8. Thermodynamics of the Lee-Wick partners: An alternative approach

    International Nuclear Information System (INIS)

    Bhattacharya, Kaushik; Das, Suratna

    2011-01-01

    It was pointed out some time ago that there can be two variations in which the divergences of a quantum field theory can be tamed using the ideas presented by Lee and Wick. In one variation the Lee-Wick partners of the normal fields live in an indefinite metric Hilbert space but have positive energy and in the other variation the Lee-Wick partners can live in a normal Hilbert space but carry negative energy. Quantum mechanically the two variations mainly differ in the way the fields are quantized. In this article the second variation of Lee and Wick's idea is discussed. Using statistical mechanical methods the energy density, pressure and entropy density of the negative energy Lee-Wick fields have been calculated. The results exactly match with the thermodynamic results of the conventional, positive energy Lee-Wick fields. The result sheds some light on the second variation of Lee-Wick's idea. The result seems to say that the thermodynamics of the theories do not care about the way they are quantized.

  9. Constraints on the Lee-Wick Higgs sector

    International Nuclear Information System (INIS)

    Carone, Christopher D.; Primulando, Reinard

    2009-01-01

    Lee-Wick partners to the standard model Higgs doublet may appear at a mass scale that is significantly lower than that of the remaining Lee-Wick partner states. The relevant effective theory is a two-Higgs doublet model in which one doublet has wrong-sign kinetic and mass terms. We determine bounds on this effective theory, including those from neutral B-meson mixing, b→X s γ, and Z→bb. The results differ from those of conventional two-Higgs doublet models and lead to meaningful constraints on the Lee-Wick Higgs sector.

  10. Design of large Francis turbine using optimal methods

    International Nuclear Information System (INIS)

    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.

  11. Design of large Francis turbine using optimal methods

    Science.gov (United States)

    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.

  12. Water quality investigation of Francis Slocum Lake, Luzerne County, Pennsylvania

    Science.gov (United States)

    Barker, James L.

    1978-01-01

    This report summarizes water-quality data collected in the Francis Slocum Lake drainage basin, Pennsylvania, during an assessment from October 1976 to September 1977. Data were collected for nitrogen, phosphorus, carbon, and fecal coliform and fecal streptococcal bacteria.Results of the restricted sampling indicate that nutrient recycling within the lake is sufficient to support the periodic luxurient growth of algae and aquatic weeds. Inflows are not contributing high concentrations of nutrients to the ecosystem. Sampling for enteric bacteria indicate the sanitary quality is sufficiently high for water-contact recreation.

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

    OpenAIRE

    Galvão, Roberto Carlos Simões

    2008-01-01

    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 sc...

  14. General Robert E. Lee -- Brightest Star in the South

    National Research Council Canada - National Science Library

    Dalton, Kent B

    2006-01-01

    .... Lee's distinctive application of operational art and leadership as the commander of the Army of Northern Virginia, we can discern many lessons which are still pertinent to our commanders at the operational level today...

  15. The Statecraft of Lee Kuan Yew, Visionary and Opportunist

    National Research Council Canada - National Science Library

    Thomas, David

    1996-01-01

    ...." "Not so," replied the passenger, Lee Kuan Yew, "Singapore intends to continue to ride along as part of the federation created with Malaysia, Sarawak, and Sabah -- we have no plans for getting off...

  16. Nobel laureate T.D. Lee at CERN

    CERN Multimedia

    2007-01-01

    On 30 August, Professor T.D. Lee, who received the Nobel Prize for Physics in 1957, gave a seminar at CERN on symmetry and asymmetry in electroweak interactions, 50 years after the discovery of the non-conservation of parity. In 1956, Tsung-Dao Lee postulated with Chen Ning Yang that parity is not conserved in weak interactions, and suggested several experiments to demonstrate this. The following year, an experiment led by Chien-Shiung Wu proved this prediction and, soon after, T.D. Lee and Chen Ning Yang were awarded the Nobel Prize for Physics. Still very active at over 80 years of age, T.D. Lee pursues his theory work to this day.

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

    Science.gov (United States)

    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.

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

    Energy Technology Data Exchange (ETDEWEB)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

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

    International Nuclear Information System (INIS)

    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

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Science.gov (United States)

    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.

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

    Directory of Open Access Journals (Sweden)

    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

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

    Science.gov (United States)

    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.

  5. Sir Francis Walshe, MD FRS (1885-1973).

    Science.gov (United States)

    Pearce, J M S

    2006-05-01

    Born in Ireland, Francis Martin Rouse Walshe studied medicine at University College Hospital. He subsequently practised there and at the National Hospital, Queen Square, London. Early associations with Wilfred Trotter and Sir Victor Horsley encouraged his career in Neurology. Walshe pioneered the descriptive analysis of human reflexes in physiological terms. His flare and outstanding brilliance were rewarded when he was appointed Physician to the National Hospital, Queen Square in 1921 and at University College Hospital in 1924. He published, mainly in Brain (which he edited for many years), weighty papers on the function of the cerebral cortex in relation to movements, and on neural physiology. Walshe is also remembered for his powers of literacy and stringent scientific criticism, which he often displayed with magnificent panache.

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

    Directory of Open Access Journals (Sweden)

    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.

  7. DCS Terrain Submission for Lee County MS

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Terrain data, as defined in FEMA Guidelines and Specifications, Appendix M: Data Capture Standards, describes the digital topographic data that was used to create...

  8. Radiation bounce from the Lee-Wick construction?

    International Nuclear Information System (INIS)

    Karouby, Johanna; Brandenberger, Robert

    2010-01-01

    It was recently realized that matter modeled by the scalar field sector of the Lee-Wick standard model yields, in the context of a homogeneous and isotropic cosmological background, a bouncing cosmology. However, bouncing cosmologies induced by pressureless matter are in general unstable to the addition of relativistic matter (i.e. radiation). Here we study the possibility of obtaining a bouncing cosmology if we add not only radiation, but also its Lee-Wick partner, to the matter sector. We find that, in general, no bounce occurs. The only way to obtain a bounce is to choose initial conditions with very special phases of the radiation field and its Lee-Wick partner.

  9. Lee Acculturation Dream Scale for Korean-American college students.

    Science.gov (United States)

    Lee, Sang Bok

    2005-04-01

    This study examined acculturation as represented in dream narratives of 165 Korean immigrant college students living in the USA. A total of 165 dreams were collected and evaluated using the Lee Acculturation Dream Scale, for which locations of dream contents were coded. 39% of the dreams took place in South Korea, while 38% were in the USA. Also, 16% of the dreams included both locations, whereas 7% had no specific dream location. The dreams contained overlapping dream messages, images, scenes, and interactions in both South Korea and the USA. A two-sample t test on the mean scores of the Lee Acculturation Dream Scale indicated no significant difference between men and women.

  10. Lee-Wick indefinite metric quantization: A functional integral approach

    International Nuclear Information System (INIS)

    Boulware, D.G.; Gross, D.J.

    1984-01-01

    In an attempt to study the stability of the Lee-Wick indefinite metric theory, the functional integral for indefinite metric quantum field theories is derived. Theories with an indefinite classical energy may be quantized with either a normal metric and an indefinite energy in Minkowski space or an indefinite metric and a positive energy in euclidean space. However, the functional integral in the latter formulation does not incorporate the Lee-Wick prescription for assuring the unitarity of the positive energy positive metric sector of the theory, hence the stability of the theory cannot be studied non-perturbatively. (orig.)

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

    Directory of Open Access Journals (Sweden)

    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.

  12. Archaeological Investigations at the Lewis Site (3LE266): A Twentieth- Century Black Owned Farmstead on the St. Francis Floodway, Lee County, Arkansas

    Science.gov (United States)

    1992-09-01

    processing of the artifacts was also competently handled by these gentlemen. Analysis of the recovered material was conducted by the author. Candice Spearman...tailed deer (Odocoileus virginianus), black bear (Ursus americanus), wolf (Canis sp.), bobcat (Lynx rufus), raccoon (Procyon Iotor), opossum (Didelphis...Lewis Site Page - 76 U I Peterson, Drexel A. 1979 An Archaeological Survey and Assessment of the Wolf River Watershed. Draft submitted to the Soil

  13. Pump used as a turbine (PAT) with flow control - Part 4: Sizing the new spiral casing; Petites centrales hydrauliques. Pompe fonctionnant en turbine avec reglage du debit (Pat-Francis). 4eme partie: dimensionnement et construction de la bache spirale

    Energy Technology Data Exchange (ETDEWEB)

    Chapallaz, J.-M.

    2007-02-15

    This fourth and final part of a final report for the Swiss Federal Office of Energy (SFOE) discusses the use of a pump equipped with variable guide vanes, similar to a Francis turbine. This fourth part of a four-part article deals with the selection of a pump and describes the general lay-out of the new spiral casing to be adapted for use in the PAT-Francis turbine. The parameters to be taken into account are looked at and calculation examples are presented. Proposals for a simplified construction are examined.

  14. Lee de Forest King of Radio, Television, and Film

    CERN Document Server

    Adams, Mike

    2012-01-01

    Lee de Forest, Yale doctorate and Oscar winner, gave voice to the radio and the motion picture. Yet by the 1930s, after the radio and the Talkies were regular features of American life, Lee de Forest had seemingly lost everything. Why? Why didn’t he receive the recognition and acclaim he sought his entire life until years later in 1959, when he was awarded an Oscar? A lifelong innovator, Lee de Forest invented the three-element vacuum tube which he developed between 1906 and 1916 as a detector, amplifier, and oscillator of radio waves. As early as 1907, he was broadcasting music programming. In 1918, he began to develop a system for recording and playing back sound by using light patterns on motion picture film. In order to promote and demonstrate his process he made hundreds of short sound films, found theatres for their showing, and issued publicity to gain audiences for his invention. While he received many patents for this technology, he was ignored by the film industry. Lee de Forest, King of Radio, Te...

  15. Must Historians Regress? An Answer to Lee Benson.

    Science.gov (United States)

    Kousser, J. Morgan

    1986-01-01

    Considers the impact of empirical social science methodology and data analysis techniques on the process of historical analysis and its product, generalizations about the past. Uses political preference and voting information as a vehicle to illustrate the differences in historical conclusions reached by Lee Benson and J. Morgan Kousser. (JDH)

  16. The Garrett Lee Smith Memorial Suicide Prevention Program

    Science.gov (United States)

    Goldston, David B.; Walrath, Christine M.; McKeon, Richard; Puddy, Richard W.; Lubell, Keri M.; Potter, Lloyd B.; Rodi, Michael S.

    2010-01-01

    In response to calls for greater efforts to reduce youth suicide, the Garrett Lee Smith (GLS) Memorial Act has provided funding for 68 state, territory, and tribal community grants, and 74 college campus grants for suicide prevention efforts. Suicide prevention activities supported by GLS grantees have included education, training programs…

  17. Sieve bootstrapping in the Lee-Carter model

    NARCIS (Netherlands)

    Heinemann, A.

    2013-01-01

    This paper studies an alternative approach to construct confidence intervals for parameter estimates of the Lee-Carter model. First, the procedure of obtaining confidence intervals using regular nonparametric i.i.d. bootstrap is specified. Empirical evidence seems to invalidate this approach as it

  18. Robert E. Lee, George Peabody, and Sectional Reunion.

    Science.gov (United States)

    Parker, Franklin

    1994-01-01

    Discusses an 1869 meeting between George Peabody, educational philanthropist, and Robert E. Lee. The meeting focused public attention on the Peabody Education Fund and the South's educational plight. Significant measures of educational efforts in the South are directly attributable to several informal meetings centered around Peabody and Lee…

  19. Rejoinder to Goldberg, Lee and Ashton : Explaining counterintuitive findings

    NARCIS (Netherlands)

    Anderson, N.; Ones, D.S.

    2008-01-01

    In their critique of our erratum and addendum (Anderson & Ones, [2008]), Goldberg, Lee, and Ashton ([2008]) allege clerical errors (1) where participants' HPI scores were incorrectly matched to other inventory scale scores and (2) in scoring of the OPQ and BPI scales. The first point was fully

  20. W3C head Berners-Lee to be knighted

    CERN Multimedia

    Gross, G

    2004-01-01

    "Tim Berners-Lee, credited with inventing the World Wide Web and now director of the World Wide Web Consortium, will be named a knight commander, Order of the British Empire, by Queen Elizabeth II, the W3C announced Wednesday" (1 page)

  1. Virginia Lee Burton's "Little House" in Popular Consciousness

    DEFF Research Database (Denmark)

    Goddard, Joseph

    2011-01-01

    This article considers the significance of Victoria Lee Burton’s authorship, specifically The Little House, for lifestyle preferences and the development of environmental consciousness in the postwar period. The article argues that Burton deliberately designed her work to evoke country-friendly s...

  2. Berners-Lee wins inaugural Millennium Technology prize

    CERN Multimedia

    2004-01-01

    "World Wide Web inventor Tim Berners-Lee today was named recipient of the first-ever Millennium Technology Prize. The honor, which is accompanied by one million euros, is bestowed by the Finnish Technology Award Foundation as an international acknowledgement of outstanding technological innovation aimed at promoting quality of life and sustainable economic and societal development" (1 page)

  3. Tim Berners-Lee, World Wide Web inventor

    CERN Document Server

    1998-01-01

    The "Internet, Web, What's next?" conference on 26 June 1998 at CERN: Tim Berners-Lee, inventor of the World Wide Web and Director of the W3C, explains how the Web came to be and gave his views on the future.

  4. Dan Gilmor Column [Berners-Lee and the WWW

    CERN Multimedia

    Gillmore, D

    2002-01-01

    In the keynote speech at the 11th Annual World Wide Web Conference, Tim Berner's Lee said that in the early days of the web, people were worrying about the same thing as today - one company dominating the market and controlling standards (2 pages).

  5. 76 FR 61135 - Environmental Impact Statement: Theodore Francis Green Airport, Warwick, RI

    Science.gov (United States)

    2011-10-03

    ... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration Environmental Impact Statement: Theodore Francis Green Airport, Warwick, RI AGENCY: Federal Aviation Administration (FAA), DOT. ACTION..., Environmental Program Manager, Federal Aviation Administration New England, 12 New England Executive Park...

  6. 78 FR 8683 - Environmental Impact Statement: Theodore Francis Green Airport, Warwick, RI

    Science.gov (United States)

    2013-02-06

    ... DEPARTMENT OF TRANSPORTATION Federal Aviation Administration Environmental Impact Statement: Theodore Francis Green Airport, Warwick, RI AGENCY: Federal Aviation Administration (FAA), DOT. ACTION..., Environmental Program Manager, Federal Aviation Administration New England, 12 New England Executive Park...

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

    Czech Academy of Sciences Publication Activity Database

    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

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

  11. Computation of Cavitating Flow in a Francis Hydroturbine

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

  13. Adaptation of Sing Lee's model to the Filippov type plasma focus geometry

    International Nuclear Information System (INIS)

    Siahpoush, V; Tafreshi, M A; Sobhanian, S; Khorram, S

    2005-01-01

    A new model for plasma behaviour in Filippov type plasma focus (PF) systems has been described and used. This model is based on the so-called slug model and Sing Lee's model for Mather type PF devices. Using the model, the discharge current and its derivative as a function of time, and the pinch time and the maximum discharge current as a function of pressure, have been predicted. At the end, the predicted data are compared with the experimental data obtained through a Filippov type PF facility with a nominal maximum energy of 90 kJ

  14. Nooruslikud juubilarid: fotokelder Lee 20 ja fotomuuseum 30 / Mall Parmas, Betty Ester-Väljaots

    Index Scriptorium Estoniae

    Parmas, Mall

    2013-01-01

    Peeter Toominga algatusel 1992. aastal asutatud Lee fotokeldrist. Loetletud fotomuuseumis oma töid eksponeerinud fotograafid. Ülevaatenäitus "Lee fotokelder 20" 17. jaanuarist 20. märtsini, koostaja Betty Ester-Väljaots

  15. Vafa-Witten theorem and Lee-Yang singularities

    International Nuclear Information System (INIS)

    Aguado, M.; Asorey, M.

    2009-01-01

    We prove the analyticity of the finite volume QCD partition function for complex values of the θ-vacuum parameter. The absence of singularities different from Lee-Yang zeros only permits and cusp singularities in the vacuum energy density and never or cusps. This fact together with the Vafa-Witten diamagnetic inequality implies the vanishing of the density of Lee-Yang zeros at θ=0 and has an important consequence: the absence of a first order phase transition at θ=0. The result provides a key missing link in the Vafa-Witten proof of parity symmetry conservation in vectorlike gauge theories and follows from renormalizability, unitarity, positivity, and existence of Bogomol'nyi-Prasad-Sommerfield bounds. Generalizations of this theorem to other physical systems are also discussed, with particular interest focused on the nonlinear CP N sigma model.

  16. Lee Miller, une battante sur tous les fronts

    Directory of Open Access Journals (Sweden)

    Anaïs Boutot

    2009-06-01

    Full Text Available L’art photographique de Lee Miller, à l’image de sa vie, revêt de multiples facettes. Après avoir été devant l’objectif en tant que mannequin puis égérie du Paris surréaliste, elle passe derrière l’objectif pour devenir photographe de mode, reporter de guerre ou encore portraitiste. L’exposition L’Art de Lee Miller, présentée au Jeu de Paume du 21 octobre 2008 au 4 janvier 2009 et accompagnée d’un ouvrage paru en français chez Hazan mettait en avant une quête d’identité et d’indépendance qui ...

  17. Economist Innovation Award for Tim Berners-Lee

    CERN Multimedia

    2003-01-01

    In September, Tim Berners-Lee, who invented the World Wide Web at CERN and is now Director of the W3C World Wide Web Consortium, received the 2nd Economist Annual Innovation Award in Computing. With the award The Economist, a British weekly newspaper, recognises individuals responsible for breakthroughs in Bioscience, Computing, Energy and the Environment, and Telecommunications that have a profound impact on industry. A fifth award is given in a special "No Boundaries" category, observing innovation that transcends industries. Candidates for the awards are proposed by The Economist readers and writers, and by a group of judges. Tim Berners-Lee received the Computing award for his global hypertext project, to be known as the World Wide Web, which "forever altered the way information is shared" and is a huge contribution to the efficiency of the scientific community. Based on a programme for storing information using random associations called "Enquire", it...

  18. What Lee Raymond actually said in Beijing [15th WPC

    International Nuclear Information System (INIS)

    Raymond, Lee.

    1997-01-01

    When Lee Raymond, Chairman and Chief Executive Officer, Exxon Corporation gave this keynote address at the recent World Petroleum Congress in Beijing, he drew attention to the way economic growth alleviates poverty and to the close linkage between economic growth and energy use. He also drew attention to the weakness of the scientific evidence for climate change being caused by fossil fuel burning and his doubts about the wisdom of setting targets for the reduction of CO 2 emissions. At a press conference after the presentation Lee Raymond assented to the suggestion that the European oil companies have been hijacked by the environmentalists. Petroleum Review has reproduced the full text of the speech so that readers can judge for themselves the merits of the arguments and their likely impact on the Kyoto conference. (UK)

  19. Fate of grape flavor precursors during storage on yeast lees.

    Science.gov (United States)

    Loscos, Natalia; Hernández-Orte, Purificación; Cacho, Juan; Ferreira, Vicente

    2009-06-24

    The effect of the addition of a grape flavor precursor extract to a grape juice, before or after fermentation with three different Saccharomyces cerevisiae yeast strains, on the evolution of the wine aroma composition during a 9-month aging period on yeast lees has been studied. Wine aroma compounds were determined by gas chromatography-mass spectrometry after alcoholic fermentation and after 3 and 9 months of storage. The aging of wine on lees caused important changes in the aroma profiles of wines, making the concentrations of three terpenes, norisoprenoids (except beta-damascenone and beta-ionone), 4-allyl-2,6-dimethoxyphenol, ethyl vanillate, syringaldehyde, and ethyl cinnamate increase, whereas the concentrations of most of the rest of compounds tended to decrease. Lees are responsible for the observed increasing trends, except for linalool and alpha-terpineol, and also for a large part of the observed decrements. As expected, the addition of precursors brings about an increment in the levels of most terpenes, norisoprenoids, vanillins, and ethyl cinnamate, and it is after an aging time when differences linked to the level of precursors in the must become more evident. The timing of the addition of precursors has a minor influence, except for beta-damascenone, vanillin, and syringaldehyde, for which supplementation after fermentation is more effective. It has also been observed that the precursor fraction makes the levels of vinylphenols decrease. Finally, it has also been found that lees from different yeast strains may have a slightly different abilities to release volatile compounds derived from precursors.

  20. Gettysburg: A Study of Lee’s Command Effectiveness, 1863

    Science.gov (United States)

    2011-03-21

    scholar of military history it is not necessary to focus strictly on the tactics of a single battle, or campaign, or even an entire war. To fully...the second day was the Peach Orchard and ultimately Cemetery Hill.48 The Peach Orchard was carried at a heavy cost but attacks on Little Round Top...Union troops to occupy the desired ground of the Peach Orchard and obtain positions on Little Round Top. Knowing Longstreet’s nature, Lee did not

  1. Tim Berners-Lee, World Wide Web inventor

    CERN Document Server

    1994-01-01

    Former physicist, Tim Berners-Lee invented the World Wide Web as an essential tool for high energy physics at CERN from 1989 to 1994. Together with a small team he conceived HTML, http, URLs, and put up the first server and the first 'what you see is what you get' browser and html editor. Tim is now Director of the Web Consortium W3C, the International Web standards body based at INRIA, MIT and Keio University.

  2. Triniti daripada Perspektif Taoisme: Analisis Pemikiran Jung Young Lee

    Directory of Open Access Journals (Sweden)

    ZURAIZA HUSIN

    2016-06-01

    Full Text Available Jung Young Lee is a Korean-born theologian who employs creatively the doctrine of the Trinity from an Asian worldview. This article aims to analyze Lee’s approaches of the Trinity with the Yin-Yang symbolism. The main reference is based on the book written by him entitled ‘The Trinity in Asian Perspective (1996’. Lee has turned his attention to the topic of Trinity through the lens of the culture and thought patterns of his own milieu. One of the leading point in presenting Yin-Yang principle as Trinitarian thinking, Lee examines the interpretation of the term “in” in the Bible, "Believe me that I am in the Father and the Father is in me" (John 14:11. The statement leads to the point that Yin and Yang cannot exist without each other because relationality is given priority than individuality. The idea is based on the terminology of ‘both/and’. So, ‘and’ indicates a Trinitarian statement, there is interdependence and unification. With reference to Trinity, the Father and the Son are One because of ‘and’. In addition, the same concept implements to the Holy Spirit. Lee views ‘and’ is not only a linking principle in both-and thinking but also the principle that is ‘between’ two. When ‘two’ exists, the third also exist between them. Based on the idea of ‘middle’, represents the connecting element between two, which contributes for the existence of the Third. Accordingly, the Spirit is the third element in the Trinity relationship.

  3. Pharmacobezoars described and demystified.

    Science.gov (United States)

    Simpson, Serge-Emile

    2011-02-01

    A bezoar is a concretion of foreign material that forms and persists in the gastrointestinal tract. Bezoars are classified by their material origins. Phytobezoars contain plant material, trichobezoars contain hair, lactobezoars contain milk proteins, and pharmacobezoars contain pharmaceutical products. Tablets, suspensions, and even insoluble drug delivery vehicles can, on rare occasions, and sometimes under specific circumstances, form pharmacobezoars. The goal of this review is to catalog and examine all of the available reports in the English language medical literature that convincingly describe the formation and management of pharmacobezoars. Articles included in this review were identified by performing searches using the terms "bezoar," "pharmacobezoar," and "concretion" in the following databases: OVID MEDLINE, PubMed, and JSTOR. The complete MEDLINE and JSTOR holdings were included in the search without date ranges. The results were limited to English language publications. Articles that described nonmedication bezoars were not included in the review. Articles describing phytobezoars, food bezoars, fecal impactions, illicit drug packet ingestions, enteral feeding material bezoars, and hygroscopic diet aid bezoars were excluded. The bibliographic references within the articles already accumulated were then examined in order to gather additional pharmacobezoar cases. The cases are grouped by pharmaceutical agent that formed the bezoar, and groupings are arranged in alphabetical order. Discussions and conclusions specific to each pharmaceutical agent are included in that agent's subheading. Patterns and themes that emerged in the review of the assembled case reports are reviewed and presented in a more concise format. Pharmacobezoars form under a wide variety of circumstances and in a wide variety of patients. They are difficult to diagnose reliably. Rules for suspecting, diagnosing, and properly managing a pharmacobezoar are highly dependent on the

  4. [Deep mycoses rarely described].

    Science.gov (United States)

    Charles, D

    1986-01-01

    Beside deep mycoses very well known: histoplasmosis, candidosis, cryptococcosis, there are other mycoses less frequently described. Some of them are endemic in some countries: South American blastomycosis in Brazil, coccidioidomycosis in California; some others are cosmopolitan and may affect everyone: sporotrichosis, or may affect only immunodeficient persons: mucormycosis. They do not spare Africa, we may encounter basidiobolomycosis, rhinophycomycosis, dermatophytosis, sporotrichosis and, more recently reported, rhinosporidiosis. Important therapeutic progresses have been accomplished with amphotericin B and with antifungus imidazole compounds (miconazole and ketoconazole). Surgical intervention is sometime recommended in chromomycosis and rhinosporidiosis.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

  7. How Mathematics Describes Life

    Science.gov (United States)

    Teklu, Abraham

    2017-01-01

    The circle of life is something we have all heard of from somewhere, but we don't usually try to calculate it. For some time we have been working on analyzing a predator-prey model to better understand how mathematics can describe life, in particular the interaction between two different species. The model we are analyzing is called the Holling-Tanner model, and it cannot be solved analytically. The Holling-Tanner model is a very common model in population dynamics because it is a simple descriptor of how predators and prey interact. The model is a system of two differential equations. The model is not specific to any particular set of species and so it can describe predator-prey species ranging from lions and zebras to white blood cells and infections. One thing all these systems have in common are critical points. A critical point is a value for both populations that keeps both populations constant. It is important because at this point the differential equations are equal to zero. For this model there are two critical points, a predator free critical point and a coexistence critical point. Most of the analysis we did is on the coexistence critical point because the predator free critical point is always unstable and frankly less interesting than the coexistence critical point. What we did is consider two regimes for the differential equations, large B and small B. B, A, and C are parameters in the differential equations that control the system where B measures how responsive the predators are to change in the population, A represents predation of the prey, and C represents the satiation point of the prey population. For the large B case we were able to approximate the system of differential equations by a single scalar equation. For the small B case we were able to predict the limit cycle. The limit cycle is a process of the predator and prey populations growing and shrinking periodically. This model has a limit cycle in the regime of small B, that we solved for

  8. 77 FR 68821 - Notice of Inventory Completion: U.S. Department of Agriculture, Forest Service, Ozark-St. Francis...

    Science.gov (United States)

    2012-11-16

    ... 3ST12 and 3ST26, on private property, by Don Williams, USDA-Forest Service Geologist, also in Stone... Inventory Completion: U.S. Department of Agriculture, Forest Service, Ozark-St. Francis National Forests... Agriculture (USDA), Forest Service, Ozark-St. Francis National Forests has completed an inventory of human...

  9. 77 FR 68819 - Notice of Inventory Completion: U.S. Department of Agriculture, Forest Service, Ozark-St. Francis...

    Science.gov (United States)

    2012-11-16

    ... Inventory Completion: U.S. Department of Agriculture, Forest Service, Ozark-St. Francis National Forests... Agriculture (USDA), Forest Service, Ozark-St. Francis National Forests has completed an inventory of human... (Wichita, Keechi, Waco & Tawakonie), Oklahoma. History and Description of the Remains In 1970 and 1971...

  10. 75 FR 80730 - Francis Slakey on Behalf of the American Physical Society; Receipt of Petition for Rulemaking

    Science.gov (United States)

    2010-12-23

    ...; ] NUCLEAR REGULATORY COMMISSION 10 CFR Part 70 Francis Slakey on Behalf of the American Physical Society... with the NRC by Francis Slakey on behalf of the American Physical Society (APS). The petition was... entry into ADAMS, which provides text and image files of NRC's public documents. If you do not have...

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

    Science.gov (United States)

    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. Phenolic characterization of aging wine lees: Correlation with antioxidant activities.

    Science.gov (United States)

    Romero-Díez, R; Rodríguez-Rojo, S; Cocero, M J; Duarte, C M M; Matias, A A; Bronze, M R

    2018-09-01

    Aging wine lees are water-wastes produced during the wine aging inside wood barrels that can be considered as alternative sources of bioactive compounds. Phenolic characterization and antioxidant activity (AA) measurements of wines lees solid-liquid extracts have been undertaken on a dry extract (DE) basis. Solvents with different polarities (water, methanol, ethanol, two hydroalcoholic mixtures and acetone) were used. Total phenolic (TPC) and total flavonoid contents (TFC) were determined. The mixture of 75:25(v/v) EtOH:H 2 O showed the highest values with 254 mg GAE /g DE and 146 mg CATE /g DE respectively. HORAC, HOSC and FRAP were used to determine the AA of the extracts being also highest for the mixture of 75:25(v/v) EtOH:H 2 O (4690 µmol CAE /g DE , 4527 µmol TE /g DE and 2197 µmol TE /g DE , respectively). For ORAC method, methanol extract showed the best value with 2771 µmol TE /g DE . Correlations between TPC, TFC, phenolic compounds and AA were determined. Most relevant compounds contributing to AA were identified using data from mass spectrometry, being mainly anthocyanins. Copyright © 2018 Elsevier Ltd. All rights reserved.

  13. T.D Lee and Lisa Randall visit ATLAS

    CERN Multimedia

    Pauline Gagnon

    Professor Tsung-Dao Lee, who received the Nobel Prize for Physics in 1957 for postulating that parity is not conserved in weak interactions, visited the ATLAS detector this month. He is seen here in the company of Peter Jenni, spokesperson for ATLAS. T.D. Lee is still very active at over 80, pursuing his theory work to this day. Professor Lisa Randall from Harvard University, the well-known theorist behind the Randall-Sundrum theory for extra dimensions, was also part of the group visiting the ATLAS detector. She is seen here with Fabiola Gianotti, deputy spokesperson for ATLAS. Lisa Randall's two initial papers have been quoted both more than 2500 times, making her the most cited theoretical physicist in the world in the last five years as of last autumn - a total of about 10,000 citations! One wonders here if Peter is pointing to a CP-violating graviton spotted in the ATLAS cavern... From left to right: Fabiola Gianotti, Gustaaf Brooijmans, convener of the ATLAS Exotics physics gro...

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

    Science.gov (United States)

    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…

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

    Science.gov (United States)

    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…

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

    Science.gov (United States)

    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…

  17. The Teaching of Greek and Latin according to Francis Parker and John Dewey.

    Science.gov (United States)

    Mavrogenes, Nancy A.

    1982-01-01

    Discusses ideas for the teaching of Latin and Greek such as integrating the study of language and culture, using a natural approach to teaching oral skills, using multiple approaches to maintain student interest, and correlating Latin with other subjects. These ideas were promoted by Francis Parker and John Dewey a century ago and are still…

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

    Science.gov (United States)

    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.

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

    Index Scriptorium Estoniae

    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

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

    Science.gov (United States)

    Wagner, Elaine

    2010-01-01

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

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

    Czech Academy of Sciences Publication Activity Database

    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)

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

    Science.gov (United States)

    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)

  3. Robert E. Lee as Operational Artist During the American Civil War

    Science.gov (United States)

    2010-04-21

    Johnston was just as arrogant as Davis. During his tenure as a student at the United States Military Academy Johnston eamed the nickname "Colonel" from his...shown previous subordinate leaders .. Lee had certainly eamed it based on his reputation and performance at Second Manassas and during his tenure as...Washington, PA: EasternNational. Roland, Charles P. 1964. The Generalship of Robert E. Lee. In Grant, Lee, Lincoln and The Radicals; Essays on

  4. Wrong vertex displacements due to Lee-Wick resonances at LHC

    International Nuclear Information System (INIS)

    Alvarez, E.; Schat, C.; Rold, L. da; Szynkman, A.

    2009-01-01

    We show how a resonance from the recently proposed Lee-Wick Standard Model could lead to wrong vertex displacements at LHCb. We study which could be the possible 'longest lived' Lee-Wick particle that could be created at LHC, and we study its possible decays and detections. We conclude that there is a region in the parameter space which would give wrong vertex displacements as a unique signature of the Lee-Wick Standard Model at LHCb. Further numerical simulation shows that LHC era could explore these wrong vertex displacements through Lee-Wick leptons below 500 GeV. (author)

  5. Fatigue analyses of the prototype Francis runners based on site measurements and simulations

    Science.gov (United States)

    Huang, X.; Chamberland-Lauzon, J.; Oram, C.; Klopfer, A.; Ruchonnet, N.

    2014-03-01

    With the increasing development of solar power and wind power which give an unstable output to the electrical grid, hydropower is required to give a rapid and flexible compensation, and the hydraulic turbines have to operate at off-design conditions frequently. Prototype Francis runners suffer from strong vibrations induced by high pressure pulsations at part load, low part load, speed-no-load and during start-stops and load rejections. Fatigue and damage may be caused by the alternating stress on the runner blades. Therefore, it becomes increasingly important to carry out fatigue analysis and life time assessment of the prototype Francis runners, especially at off-design conditions. This paper presents the fatigue analyses of the prototype Francis runners based on the strain gauge site measurements and numerical simulations. In the case of low part load, speed-no-load and transient events, since the Francis runners are subjected to complex hydraulic loading, which shows a stochastic characteristic, the rainflow counting method is used to obtain the number of cycles for various dynamic amplitude ranges. From middle load to full load, pressure pulsations caused by Rotor-stator- Interaction become the dominant hydraulic excitation of the runners. Forced response analysis is performed to calculate the maximum dynamic stress. The agreement between numerical and experimental stresses is evaluated using linear regression method. Taking into account the effect of the static stress on the S-N curve, the Miner's rule, a linear cumulative fatigue damage theory, is employed to calculate the damage factors of the prototype Francis runners at various operating conditions. The relative damage factors of the runners at different operating points are compared and discussed in detail.

  6. The Friedberg-Lee symmetry and minimal seesaw model

    International Nuclear Information System (INIS)

    He Xiaogang; Liao Wei

    2009-01-01

    The Friedberg-Lee (FL) symmetry is generated by a transformation of a fermionic field q to q+ξz. This symmetry puts very restrictive constraints on allowed terms in a Lagrangian. Applying this symmetry to N fermionic fields, we find that the number of independent fields is reduced to N-1 if the fields have gauge interaction or the transformation is a local one. Using this property, we find that a seesaw model originally with three generations of left- and right-handed neutrinos, with the left-handed neutrinos unaffected but the right-handed neutrinos transformed under the local FL translation, is reduced to an effective theory of minimal seesaw which has only two right-handed neutrinos. The symmetry predicts that one of the light neutrino masses must be zero.

  7. Searching for Lee-Wick Gauge Bosons at the LHC

    Energy Technology Data Exchange (ETDEWEB)

    Rizzo, Thomas G.

    2007-04-30

    In an extension of the Standard Model(SM) based on the ideas of Lee and Wick, Grinstein, O'Connell and Wise have found an interesting way to remove the usual quadratically divergent contributions to the Higgs mass induced by radiative corrections. Phenomenologically, the model predicts the existence of Terascale, negative-norm copies of the usual SM fields with rather unique properties: ghost-like propagators and negative decay widths, but with otherwise SM-like couplings. The model is both unitary and causal on macroscopic scales. In this paper we examine whether or not such states with these unusual properties can be uniquely identified as such at the LHC. We find that in the extended strong and electroweak gauge boson sector of the model, which is the simplest one to analyze, such an identification can be rather difficult. Observation of heavy gluon-like resonances in the dijet channel offers the best hope for this identification.

  8. THE YUAN-TSEH LEE ARRAY FOR MICROWAVE BACKGROUND ANISOTROPY

    International Nuclear Information System (INIS)

    Ho, Paul T. P.; Altamirano, Pablo; Chang, C.-H.; Chang, S.-H.; Chang, S.-W.; Chen, C.-C.; Chen, K.-J.; Chen, M.-T.; Han, C.-C.; Ho, West M.; Huang, Y.-D.; Hwang, Y.-J.; Ibanez-Romano, Fabiola; Jiang Homin; Koch, Patrick M.; Kubo, Derek Y.; Li, C.-T.; Lim, Jeremy; Lin, K.-Y.; Liu, G.-C.

    2009-01-01

    The Yuan-Tseh Lee Array for microwave background anisotropy is the first interferometer dedicated to study the cosmic microwave background radiation at 3 mm wavelength. The choice of 3 mm is to minimize the contributions from foreground synchrotron radiation and Galactic dust emission. The initial configuration of seven 0.6 m telescopes mounted on a 6 m hexapod platform was dedicated in 2006 October on Mauna Loa, Hawaii. Scientific operations began with the detection of a number of clusters of galaxies via the thermal Sunyaev-Zel'dovich effect. We compare our data with Subaru weak-lensing data to study the structure of dark matter. We also compare our data with X-ray data to derive the Hubble constant.

  9. Perturbative unitarity of Lee-Wick quantum field theory

    Science.gov (United States)

    Anselmi, Damiano; Piva, Marco

    2017-08-01

    We study the perturbative unitarity of the Lee-Wick models, formulated as nonanalytically Wick rotated Euclidean theories. The complex energy plane is divided into disconnected regions and the values of a loop integral in the various regions are related to one another by a nonanalytic procedure. We show that the one-loop diagrams satisfy the expected, unitary cutting equations in each region: only the physical d.o.f. propagate through the cuts. The goal can be achieved by working in suitable subsets of each region and proving that the cutting equations can be analytically continued as a whole. We make explicit calculations in the cases of the bubble and triangle diagrams and address the generality of our approach. We also show that the same higher-derivative models violate unitarity if they are formulated directly in Minkowski spacetime.

  10. ‘Dolls in Agony’: Vernon Lee in Southern Spain

    OpenAIRE

    Barrera-Medrano, Leire

    2016-01-01

    Lorsque Vernon Lee se rendit dans le sud de l’Espagne en 1889, elle trouva que les pratiques catholiques qui y étaient exercées étaient extrêmement déroutantes. La décoration excessive des églises et le penchant local pour des représentations sanglantes du Christ en croix étaient, d’après elle, « obscènes » et « excessives ». En particulier, la représentation des Madones espagnoles, constamment figurées éplorées, lui répugnait. Ce sentiment de rejet envers ce pays catholique et plus particuli...

  11. A multi-developing-country comparison of the lee-carter model for ...

    African Journals Online (AJOL)

    This study evaluate the Lee-Carter model for projecting age and gender specific mortality rates and life expectancy at births in four developing countries namely Malaysia, Indonesia, Thailand and Singapore. Although the Lee-Carter model has been successfully applied in many developed countries, little information is ...

  12. Tim Berners-Lee at the RSIS conference from 8-9 December 2003.

    CERN Multimedia

    Patrice Loiez

    2003-01-01

    Tim Berners-Lee participated in the Role of Science in the Information Society conference held at CERN from 8-9 December 2003. Tim Berners-Lee developed the first network and server system that lead to the World Wide Web.

  13. Grain-size sorting in grainflows at the lee side of deltas

    NARCIS (Netherlands)

    Kleinhans, M.G.

    2005-01-01

    The sorting of sediment mixtures at the lee slope of deltas (at the angle of repose) is studied with experiments in a narrow, deep flume with subaqueous Gilbert-type deltas using varied flow conditions and different sediment mixtures. Sediment deposition and sorting on the lee slope of the delta

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

    Science.gov (United States)

    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.

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

    International Nuclear Information System (INIS)

    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.

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

    Energy Technology Data Exchange (ETDEWEB)

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

  20. Francis Young, English Catholics and the Supernatural, 1553-1829. Catholic Christendom, 1300-1700

    OpenAIRE

    LUX-STERRITT, Laurence

    2014-01-01

    In this monograph, Francis Young acts upon one of the key observations he had made in an article on exorcism in the early modern English Catholic mission: there appeared to be no full-length studies of the attitudes of English Catholics to the supernatural. Scholars had offered illuminating analyses of the Protestant views of Catholic involvement with the supernatural, but nothing had been published to document at length how Catholics themselves perceived and experienced supernatural phenomen...

  1. Mystic of St. Seraphim of Sarov and St. Francis of Assisi

    Directory of Open Access Journals (Sweden)

    Mirosław Białous

    2015-11-01

    Full Text Available This paper presents figures of St. Seraphim and St. Francis, comparing their mystic. Both saints are regarded as typical representatives of his age and his milieu: St. Seraphim – of the Eastern Orthodox Christian mystic, St. Francis – of the Christian West, the Roman Catholic mysticism. Similar was their life of poverty, similar the joy of life and the attitude towards nature, similar the ecclesial and sacramental dimension of their spirituality. But there were differences. St. Francis’ mystic is more associated with the sphere of emotional and material world, with the earthly reality. And St. Seraphim is a faithful follower of the monastic tradition of Mount Sinai, of Athos and of the other representatives of hesychasm who remaining in the earthly body experienced the spiritual liberation. These differences are visible, if we compare the experience of Christ by Seraphim on Great Thursday and the vision of St Francis on the mountain of Alvernia.

  2. James Lee Byars 1/2 an autobiography, sourcebook

    CERN Document Server

    Byars, James Lee; Eleey, Peter

    2014-01-01

    "I see my autobiography as an arbitrary segment of so many pages of time, of things that I have paid attention to at this point in my life," wrote James Lee Byars (1932-1997) in 1969. He was then 37, about half the average male lifespan at the time, and accordingly thought it appropriate to write his "1/2 autobiography." Byars' art ranged from highly refined objects to extremely minimal performance and events, and books, ephemera and correspondence that he distributed widely among friends and colleagues. Today, more than 15 years after his death, assessments of his art must negotiate Byars' performance of his charismatic self in his life and art. For his first major posthumous survey in the US, exhibition curators Magalí Arriola and Peter Eleey decided to produce a catalogue in two "halves," playing on his "1/2 autobiography": a catalogue of the exhibition itself, including new scholarship, and a sourcebook of primary documents. 1/2 an Autobiography, Sourcebook constitutes the latter volume--a reference guid...

  3. Hartree-Fock treatment of Fermi polarons using the Lee-Low-Pine transformation

    Science.gov (United States)

    Kain, Ben; Ling, Hong Y.

    2017-09-01

    We consider the Fermi polaron problem at zero temperature, where a single impurity interacts with noninteracting host fermions. We approach the problem starting with a Fröhlich-like Hamiltonian where the impurity is described with canonical position and momentum operators. We apply the Lee-Low-Pine (LLP) transformation to change the fermionic Fröhlich Hamiltonian into the fermionic LLP Hamiltonian, which describes a many-body system containing host fermions only. We adapt the self-consistent Hartree-Fock (HF) approach, first proposed by Edwards, to the fermionic LLP Hamiltonian in which a pair of host fermions with momenta k and k' interact with a potential proportional to k .k' . We apply the HF theory, which has the advantage of not restricting the number of particle-hole pairs, to repulsive Fermi polarons in one dimension. When the impurity and host fermion masses are equal our variational ansatz, where HF orbitals are expanded in terms of free-particle states, produces results in excellent agreement with McGuire's exact analytical results based on the Bethe ansatz. This work raises the prospect of using the HF ansatz and its time-dependent generalization as building blocks for developing all-coupling theories for both equilibrium and nonequilibrium Fermi polarons in higher dimensions.

  4. Test procedure for the Master-Lee and the modified Champion four inch hydraulic cutters

    International Nuclear Information System (INIS)

    Crystal, J.B.

    1995-01-01

    The Master-Lee and the modified Champion 4 Inch hydraulic cutters are being retested to gather and document information related to the following: determine if the Master-Lee cutters will cut the trunnions of an Aluminum fuel canister and a Stainless Steel fuel canister; determine if the Master-Lee cutters will cut 1 1/2 inch diameter fire hose; determine if the modified Champion 4 inch blade will cut sections of piping; and determine the effectiveness of the centering device for the Champion 4 Inch cutters. Determining the limitations of the hydraulic cutter will aid in the process of debris removal in the K-Basin. Based on a previous test, the cutters were returned to the manufacturer for modifications. The modifications to the Champion 4 Inch Cutter and further testing of the Master-Lee Cutter are the subjects of these feature tests

  5. 75 FR 11225 - Environmental Impact Statement; Lee and Collier Counties, Florida

    Science.gov (United States)

    2010-03-10

    ... DEPARTMENT OF TRANSPORTATION Federal Highway Administration Environmental Impact Statement; Lee and Collier Counties, Florida AGENCY: Federal Highway Administration (FHWA), DOT. ACTION: Notice of... INFORMATION CONTACT: Mr. George Hadley, Environmental Programs Coordinator, Federal Highway Administration...

  6. Näitleja Tommy Lee Jonesi meditatsioon režissööritoolis / Andris Feldmanis

    Index Scriptorium Estoniae

    Feldmanis, Andris, 1982-

    2007-01-01

    Vestern "Melquiades Estrada kolm matust" ("The Three Burials of Melquiades Estrada") : stsenarist Guillermo Arriaga : režissöör ja osatäitja Tommy Lee Jones : operaator Chris Menges : Ameerika Ühendriigid, 2005

  7. The Pitzer-Lee-Kesler-Teja (PLKT) Strategy and Its Implementation by Meta-Computing Software

    Czech Academy of Sciences Publication Activity Database

    Smith, W. R.; Lísal, Martin; Missen, R. W.

    2001-01-01

    Roč. 35, č. 1 (2001), s. 68-73 ISSN 0009-2479 Institutional research plan: CEZ:AV0Z4072921 Keywords : The Pitzer-Lee-Kesler-Teja (PLKT) strategy * implementation Subject RIV: CF - Physical ; Theoretical Chemistry

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

    Directory of Open Access Journals (Sweden)

    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.

  9. Behind their eyes : identity in the work of Li-Young Lee and Suji Kwock Kim

    OpenAIRE

    Hand, Meadhbh

    2014-01-01

    The introduction to this study outlines the theoretical framework for comparing the work of Li-Young Lee and Suji Kwock Kim. Using Walter Mignolo's theories about "border thinking," which he outlined in Local Histories/Global Designs, alongside Anzaldua's Borderlands/La Frontera as a basis for approaching Kim's and Lee's work, I demonstrate how the poets may be considered as embodying the role of border thinkers. Marianne Hirsch's definition of "postmemory," is explored, and its relevance to ...

  10. Comparative genomics and stx phage characterization of LEE-negative Shiga toxin-producing Escherichia coli

    Directory of Open Access Journals (Sweden)

    Susan Renee Steyert

    2012-11-01

    Full Text Available Infection by Escherichia coli and Shigella species are among the leading causes of death due to diarrheal disease in the world. Shiga toxin producing Escherichia coli (STEC that do not encode the locus of enterocyte effacement (LEE-negative STEC often possess Shiga toxin gene variants and have been isolated from humans and a variety of animal sources. In this study, we compare the genomes of nine LEE-negative STEC harboring various stx alleles with four complete reference LEE-positive STEC isolates. Compared to a representative collection of prototype E. coli and Shigella isolates representing each of the pathotypes, the whole genome phylogeny demonstrated that these isolates are diverse. Whole genome comparative analysis of the 13 genomes revealed that in addition to the absence of the LEE pathogenicity island, phage encoded genes including non-LEE encoded effectors, were absent from all nine LEE-negative STEC genomes. Several plasmid-encoded virulence factors reportedly identified in LEE-negative STEC isolates were identified in only a subset of the nine LEE-negative isolates further confirming the diversity of this group. In combination with whole genome analysis, we characterized the lambdoid phages harboring the various stx alleles and determined their genomic insertion sites. Although the integrase gene sequence corresponded with genomic location, it was not correlated with stx variant, further highlighting the mosaic nature of these phages. The transcription of these phages in different genomic backgrounds was examined. Expression of the Shiga toxin genes, stx1 and/or stx2, as well as the Q genes, were examined with quantitative reverse transcriptase polymerase chain reaction (qRT-PCR assays. A wide range of basal and induced toxin induction was observed. Overall, this is a first significant foray into the genome space of this unexplored group of emerging and divergent pathogens.

  11. Static and dynamic stress analyses of the prototype high head Francis runner based on site measurement

    Science.gov (United States)

    Huang, X.; Oram, C.; Sick, M.

    2014-03-01

    More efforts are put on hydro-power to balance voltage and frequency within seconds for primary control in modern smart grids. This requires hydraulic turbines to run at off-design conditions. especially at low load or speed-no load. Besides. the tendency of increasing power output and decreasing weight of the turbine runners has also led to the high level vibration problem of the runners. especially high head Francis runners. Therefore. it is important to carry out the static and dynamic stress analyses of prototype high head Francis runners. This paper investigates the static and dynamic stresses on the prototype high head Francis runner based on site measurements and numerical simulations. The site measurements are performed with pressure transducers and strain gauges. Based on the measured results. computational fluid dynamics (CFD) simulations for the flow channel from stay vane to draft tube cone are performed. Static pressure distributions and dynamic pressure pulsations caused by rotor-stator interaction (RSI) are obtained under various operating conditions. With the CFD results. static and dynamic stresses on the runner at different operating points are calculated by means of the finite element method (FEM). The agreement between simulation and measurement is analysed with linear regression method. which indicates that the numerical result agrees well with that of measurement. Furthermore. the maximum static and dynamic stresses on the runner blade are obtained at various operating points. The relations of the maximum stresses and the power output are discussed in detail. The influences of the boundary conditions on the structural behaviour of the runner are also discussed.

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

    Directory of Open Access Journals (Sweden)

    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.

  13. El placer de la virtud en el universo moral de Francis Hutcheson

    OpenAIRE

    Mauri, M. (Margarita)

    2010-01-01

    Hutcheson define la virtud por su relación con la inclinación benevolente de la naturaleza humana y su proyección a través de los actos del agente moral que buscan la felicidad ajena. Los actos virtuosos son objeto del sentido moral, cuya capacidad de valorarlos va unida al sentimiento que despiertan en el observador, atento a sus consecuencias. El artículo trata de articular los conceptos fundamentales de la filosofía moral de Francis Hutcheson en torno a la definición que ofrece de virtud m...

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

  17. Francis Galloway

    African Journals Online (AJOL)

    In Vlam in die sneeu kry lesers dan vir die eerste maal indringende toegang tot. Brink en Jonker se verhouding in hulle eie woorde, vergesel van 'n aantal foto's en faksimilees van 'n paar briewe en tele- gramme. Soos Willie Burger in sy knap voorwoord tot die versameling aandui, kan hierdie stel briewe gelees word as 'n.

  18. Characterization and Comparison of Wine Lees by Liquid Chromatography-Mass Spectrometry in High-Resolution Mode.

    Science.gov (United States)

    Delgado de la Torre, M P; Priego-Capote, F; Luque de Castro, M D

    2015-02-04

    Wine lees from 11 different wineries pertaining to two denominations of origin in Spain (La Rioja and Ribera del Duero) have been characterized in this research by LC-MS/MS in high-resolution mode. For this purpose, the wine lees were separated into the liquid phase (imbibed wine from lees) and the solid residue, which was dried and subjected to solid-liquid extraction assisted by microwaves (dried lees). Both fractions were separately analyzed and the fractions from the 11 wineries compared to find similarity in their patterns. The statistical analysis enabled both differences and common aspects in the composition of imbibed wine from lees and dried lees from all wineries to be found. MS/MS tentative identification of representative compounds in each fraction revealed the varied composition of wine lees with special emphasis on flavonoids such as quercetin, myricetin, and malvidin 3-galactoside, identified in extracts of dried lees, or other compounds such as kaempferol 3-(2',3'-diacetylrhamnoside)-7″-rhamnoside, aminocaproic acid, and citric acid, exclusively identified in imbibed wine from lees. The adsorbent capacity of the solid residue justified the high concentration of phenolic compounds in the extracts from solid lees. The differences found in the composition of the two phases support the separated exploitation of them.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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).

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

    Science.gov (United States)

    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.

  2. Five Describing Factors of Dyslexia

    Science.gov (United States)

    Tamboer, Peter; Vorst, Harrie C. M.; Oort, Frans J.

    2016-01-01

    Two subtypes of dyslexia (phonological, visual) have been under debate in various studies. However, the number of symptoms of dyslexia described in the literature exceeds the number of subtypes, and underlying relations remain unclear. We investigated underlying cognitive features of dyslexia with exploratory and confirmatory factor analyses. A…

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

    Science.gov (United States)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

  5. Procedure to describe clavicular motion.

    Science.gov (United States)

    Gutierrez Delgado, Guivey; De Beule, Matthieu; Ortega Cardentey, Dolgis R; Segers, Patrick; Iznaga Benítez, Arsenio M; Rodríguez Moliner, Tania; Verhegghe, Benedict; Palmans, Tanneke; Van Hoof, Tom; Van Tongel, Alexander

    2017-03-01

    For many years, researchers have attempted to describe shoulder motions by using different mathematical methods. The aim of this study was to describe a procedure to quantify clavicular motion. The procedure proposed for the kinematic analysis consists of 4 main processes: 3 transcortical pins in the clavicle, motion capture, obtaining 3-dimensional bone models, and data processing. Clavicular motion by abduction (30° to 150°) and flexion (55° to 165°) were characterized by an increment of retraction of 27° to 33°, elevation of 25° to 28°, and posterior rotation of 14° to 15°, respectively. In circumduction, clavicular movement described an ellipse, which was reflected by retraction and elevation. Kinematic analysis shows that the articular surfaces move by simultaneously rolling and sliding on the convex surface of the sternum for the 3 movements of abduction, flexion, and circumduction. The use of 3 body landmarks in the clavicle and the direct measurement of bone allowed description of the osteokinematic and arthrokinematic movement of the clavicle. Copyright © 2017 Journal of Shoulder and Elbow Surgery Board of Trustees. Published by Elsevier Inc. All rights reserved.

  6. Utilization of a factorial design to study the composting of hydrolyzed grape marc and vinification lees.

    Science.gov (United States)

    Paradelo, Remigio; Moldes, Ana B; Barral, María T

    2010-03-10

    Hydrolyzed grape marc (HGM) is the solid residue generated after the acid hydrolysis of grape marc to obtain hemicellulosic sugars for biotechnological purposes. In this work, HGM containing cellulose and lignin was composted together with vinification lees to obtain plant substrates on a laboratory scale. The effects of temperature (in the range of 20-50 degrees C), concentration of vinification lees (5-100 g/100 g of hydrolyzed grape marc), and concentration of CaCO(3) on the final properties of the composted HGM were studied by means of an experimental plan with factorial structure. The interrelationship between dependent and operational variables was established by models including linear, interaction, and quadratic terms. The most influential variable on the C/N ratio and P, K and Mg contents of composted substrates was the vinification lees concentration followed by the temperature, whereas on Na content and electrical conductivity the most influential variable was the temperature followed by the vinification lees concentration. The results of the incubation experiments indicated that optimal conditions for obtaining plant substrates can be achieved by composting 1:1 mixtures of hydrolyzed grape marc and vinification lees, in the presence of 5 g of CaCO(3)/100 g of HGM. During composting the pH of the mixtures increased from 5.1-6.7 to 7.1-8.1, salinity and water-soluble carbon were reduced in most cases, and the initial phytotoxicity disappeared in all of the mixtures tested.

  7. Practicing psychology in the art gallery: Vernon Lee's aesthetics of empathy.

    Science.gov (United States)

    Lanzoni, Susan

    2009-01-01

    Late nineteenth-century psychologists and aestheticians were fascinated by the study of psychological and physiological aspects of aesthetic response, and the British intellectual and aesthete Vernon Lee was a major participant in this venture. Working outside the academy, Lee conducted informal experiments with Clementina Anstruther-Thomson, recording changes in respiration, balance, emotion, and body movements in response to aesthetic form. In fashioning her aesthetics of empathy, she mined a wealth of psychological theories of the period including motor theories of mind, physiological theories of emotion, evolutionary models of the usefulness of art, and, most prominently, the empathic projection of feeling and movement into form. Lee distributed questionnaires, contributed to scientific journals, carried out her own introspective studies, and debated aesthetics with leading psychologists. This paper critiques the prevailing view of Lee's aesthetics as a displaced sign of her gender or sexuality, and questions her status as simply an amateur in the field of psychology. Instead, I argue that Lee's empirically based empathy theory of art was a significant contribution to debates on psychological aesthetics at the outset of the twentieth century, offering a synthesis of Lipps's mentalistic Einfühlung and sensation-based imitation theories of aesthetic response.

  8. Expression Regulation of Polycistronic lee3 Genes of Enterohaemorrhagic Escherichia coli.

    Directory of Open Access Journals (Sweden)

    Wei-Sheng W Sun

    Full Text Available Enterohaemorrhagic Escherichia coli O157:H7 (EHEC carries a pathogenic island LEE that is consisted mainly of five polycistronic operons. In the lee3 operon, mpc is the first gene and has been reported to down regulate the type-3 secretion system of EHEC when its gene product is over-expressed. Furthermore, mpc has been suggested to have a regulation function via translation but the mechanism remains unclear. To clarify this hypothesis, we dissected the polycistron and examined the translated products. We conclude that translation of mpc detrimentally governs the translation of the second gene, escV, which in turn affects the translation of the third gene, escN. Then sequentially, escN affects the expression of the downstream genes. Furthermore, we located a critical cis element within the mpc open-reading frame that plays a negative role in the translation-dependent regulation of lee3. Using qRT-PCR, we found that the amount of mpc RNA transcript present in EHEC was relatively limited when compared to any other genes within lee3. Taken together, when the transcription of LEE is activated, expression of mpc is tightly controlled by a restriction of the RNA transcript of mpc, translation of which is then critical for the efficient production of the operon's downstream gene products.

  9. [Lee Jungsook, a Korean independence activist and a nurse during the Japanese colonial period].

    Science.gov (United States)

    Kim, Sook Young

    2015-04-01

    This article examines the life of Lee Jungsook, a Korean nurse, as a independence activist during the Japanese colonial period. Lee Jungsook(1896-1950) was born in Bukchung in Hamnam province. She studied at Chungshin girl's high school and worked at Severance hospital. The characteristics and culture of her educational background and work place were very important factors which influenced greatly the life of Lee Jungsook. She learned independent spirit and nationalism from Chungshin girls' high school and worked as nurse at the Severance hospital which were full of intense aspiration for Korea's independence. Many of doctors, professors and medical students were participated in the 3.1 Independence Movement. Lee Jungsook was a founding member of Hyulsungdan who tried to help the independence activists in prison and their families and worked as a main member of Korean Women's Association for Korean Independece and Kyungsung branch of the Korean Red Cross. She was sent to jail by the Japanese government for her independence activism. After being released after serving two years confinement, she worked for the Union for Women's Liberation as a founding member. Lee Joungsook was a great independence activist who had a nursing care spirit as a nurse.

  10. Occipital condylar dysplasia in a Jacob lamb ( Ovis aries ) | Lee ...

    African Journals Online (AJOL)

    multihorned) phenotype. We describe a four-horned Jacob lamb that exhibited progressive congenital hindlimb ataxia and paresis, and was euthanased four weeks post-partum. Necropsy and CT-scan revealed deformity and asymmetry of the ...

  11. Duke Power's William Lee says INPO's purpose is solving industry problems, not educating the public

    International Nuclear Information System (INIS)

    Anon.

    1984-01-01

    Former Institute of Nuclear Power Operations (INPO) head, William Lee thinks that nuclear critics could misuse institute reports on investigations of nuclear plant construction and operation. If so, that would outweigh any public relations benefits of using the reports to inform and educate the public. Lee thinks the best way to gain public confidence is for the industry to perform well. The four-year-old institute was originally formed to improve operations, but recent problems with unfinished plants led to a system of construction audits. By offering guidance to companies building nuclear plants, INPO is meeting competition from utilities such as Duke Power, which is now marketing its expertise in designing and building plants. Lee emphasizes the importance of asking the right questions that will lead to quality control

  12. Practical Improvements to the Lee-More Conductivity Near the Metal-Insulator Transition

    International Nuclear Information System (INIS)

    Desjarlais, Michael P.

    2000-01-01

    The wide-range conductivity model of Lee and More is modified to allow better agreement with recent experimental data and theories for dense plasmas in the metal-insulator transition regime. Modifications primarily include a new ionization equilibrium model, consisting of a smooth blend between single ionization Saha (with a pressure ionization correction) and the generic Thomas-Fermi ionization equilibrium, a more accurate treatment of electron-neutral collisions using a polarization potential, and an empirical modification to the minimum allowed collision time. These simple modifications to the Lee-More algorithm permit a more accurate modeling of the physics near the metal-insulator transition, while preserving the generic Lee-More results elsewhere

  13. Practical improvements to the Lee-More conductivity near the metal-insulator transition

    International Nuclear Information System (INIS)

    Desjarlais, M.P.

    2001-01-01

    The wide-range conductivity model of Lee and More is modified to allow better agreement with recent experimental data and theories for dense plasmas in the metal-insulator transition regime. Modifications primarily include a new ionization equilibrium model, consisting of a smooth blend between single ionization Saha (with a pressure ionization correction) and the generic Thomas-Fermi ionization equilibrium, a more accurate treatment of electron-neutral collisions using a polarization potential, and an empirical modification to the minimum allowed collision time. These simple modifications to the Lee-More algorithm permit a more accurate modeling of the physics near the metal-insulator transition, while preserving the generic Lee-More results elsewhere. (orig.)

  14. Persistence Statements: Describing Digital Stickiness

    Directory of Open Access Journals (Sweden)

    John Kunze

    2017-08-01

    Full Text Available In this paper we present a draft vocabulary for making “persistence statements.” These are simple tools for pragmatically addressing the concern that anyone feels upon experiencing a broken web link. Scholars increasingly use scientific and cultural assets in digital form, but choosing which among many objects to cite for the long term can be difficult. There are few well-defined terms to describe the various kinds and qualities of persistence that object repositories and identifier resolvers do or don’t provide. Given an object’s identifier, one should be able to query a provider to retrieve human- and machine-readable information to help judge the level of service to expect and help gauge whether the identifier is durable enough, as a sort of long-term bet, to include in a citation. The vocabulary should enable providers to articulate persistence policies and set user expectations.

  15. Secretion of flagellin by the LEE-encoded type III secretion system of enteropathogenic Escherichia coli

    Directory of Open Access Journals (Sweden)

    Kaparakis Maria

    2009-02-01

    Full Text Available Abstract Background Enteropathogenic Escherichia coli (EPEC is an attaching and effacing (A/E pathogen that possesses a type III secretion system (T3SS encoded within the locus of enterocyte effacement (LEE. The LEE is essential for A/E lesion formation and directs the secretion and translocation of multiple LEE-encoded and non-LEE encoded effector proteins into the cytosol of infected cells. In this study we used proteomics to compare proteins exported to the culture supernatant by wild type EPEC E2348/69, a ΔespADB mutant and a ΔescF T3SS mutant. Results We observed that flagellin was consistently and strongly present in the secretome of wild type EPEC and the ΔespADB mutant but present only weakly in the secretome of the ΔescF mutant. Given the ancestral relationship between the flagella export apparatus and virulence associated T3SSs, we investigated whether FliC could utilise the LEE-encoded T3SS for export. In the absence of a functional flagella export apparatus, we showed that FliC could be secreted by the LEE-encoded T3SS and stimulate (Toll-like receptor 5 TLR5 signalling but could not confer motility. Conclusion Since the secretion of FliC during A/E lesion formation would presumably be disadvantageous for the pathogen, we propose that virulence associated T3SSs and flagella T3SSs have evolved through a system of chaperones and complex regulatory pathways to be functional at different times to ensure that FliC secretion does not occur during T3SS effector translocation.

  16. Secretion of flagellin by the LEE-encoded type III secretion system of enteropathogenic Escherichia coli.

    Science.gov (United States)

    Badea, Luminita; Beatson, Scott A; Kaparakis, Maria; Ferrero, Richard L; Hartland, Elizabeth L

    2009-02-06

    Enteropathogenic Escherichia coli (EPEC) is an attaching and effacing (A/E) pathogen that possesses a type III secretion system (T3SS) encoded within the locus of enterocyte effacement (LEE). The LEE is essential for A/E lesion formation and directs the secretion and translocation of multiple LEE-encoded and non-LEE encoded effector proteins into the cytosol of infected cells. In this study we used proteomics to compare proteins exported to the culture supernatant by wild type EPEC E2348/69, a DeltaespADB mutant and a DeltaescF T3SS mutant. We observed that flagellin was consistently and strongly present in the secretome of wild type EPEC and the DeltaespADB mutant but present only weakly in the secretome of the DeltaescF mutant. Given the ancestral relationship between the flagella export apparatus and virulence associated T3SSs, we investigated whether FliC could utilise the LEE-encoded T3SS for export. In the absence of a functional flagella export apparatus, we showed that FliC could be secreted by the LEE-encoded T3SS and stimulate (Toll-like receptor 5) TLR5 signalling but could not confer motility. Since the secretion of FliC during A/E lesion formation would presumably be disadvantageous for the pathogen, we propose that virulence associated T3SSs and flagella T3SSs have evolved through a system of chaperones and complex regulatory pathways to be functional at different times to ensure that FliC secretion does not occur during T3SS effector translocation.

  17. 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

    Energy Technology Data Exchange (ETDEWEB)

    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.

  18. Modelagem conjunta da média e dispersão de Nelder e Lee como alternativa aos métodos de Taguchi

    Directory of Open Access Journals (Sweden)

    Edmilson Rodrigues Pinto

    2006-08-01

    Full Text Available Nos últimos anos, uma coleção de técnicas para a melhoria da qualidade foi desenvolvida, no Japão, por Genichi Taguchi no planejamento, na evolução e na fabricação de produtos industrializados. Esta revolução no campo da qualidade despertou o interesse, no mundo inteiro, de vários engenheiros e estatísticos, que propuseram vários métodos alternativos, mais claros e eficientes do que aqueles propostos por Taguchi. Nelder e Lee observaram que a metodologia de Taguchi conduz a um modelo conjunto para a média e dispersão, usando modelos lineares generalizados. Eles mostraram como esta classe é geral e suficiente para a análise desses modelos. O objetivo deste artigo é fazer uma síntese da modelagem conjunta da média e dispersão, proposta por Nelder e Lee, explicitando, de uma forma concisa, os principais pontos da teoria.In the last years, in Japan, Genichi Taguchi developed some techniques to improve the quality of the products during its design, evolution and manufacture. His ideas have raised the attention of engineers and statisticians around the world who have proposed some alternative methods that are simpler and more efficient than Taguchi's methods. Nelder and Lee observed that Taguchi's methodology lead up to a joint model for the mean and dispersion employing generalized linear models. They showed that this class is general and sufficient to analyze Taguchi's Models. The purpose of this work is to describe joint modeling of mean and dispersion that was proposed by Nelder and Lee and the key points of the theory in a concise manner.

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

    Directory of Open Access Journals (Sweden)

    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.

  20. 77 FR 3010 - In the Matter of Mr. Francis Guilbeau; Order Prohibiting Involvement in NRC-Licensed Activities

    Science.gov (United States)

    2012-01-20

    ... COMMISSION In the Matter of Mr. Francis Guilbeau; Order Prohibiting Involvement in NRC-Licensed Activities I... days prior to going out on this job, Mr. Guilbeau chose the correct response to a question asking what... incident occurred on Mr. Guilbeau's first job back with Accurate NDE after several years working elsewhere...

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

    Science.gov (United States)

    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…

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

    Science.gov (United States)

    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.

  3. Synchronization and anti-synchronization coexist in Chen-Lee chaotic systems

    International Nuclear Information System (INIS)

    Chen, J.-H.; Chen, H.-K.; Lin, Y.-K.

    2009-01-01

    This study demonstrates that synchronization and anti-synchronization can coexist in Chen-Lee chaotic systems by direct linear coupling. Based on Lyapunov's direct method, a linear controller was designed to assure that two different types of synchronization can simultaneously be achieved. Further, the hybrid projective synchronization of Chen-Lee chaotic systems was studied using a nonlinear control scheme. The nonlinear controller was designed according to the Lyapunov stability theory to guarantee the hybrid projective synchronization, including synchronization, anti-synchronization, and projective synchronization. Finally, numerical examples are presented in order to illustrate the proposed synchronization approach.

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

    Science.gov (United States)

    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.

  5. The scientific life of Victor Franz (Francis) Hess (June 24, 1883-December 17, 1964)

    Science.gov (United States)

    Schuster, Peter Maria

    2014-01-01

    On the seventh of August 1912, from the measurements upon his seventh balloon ride that had taken him up to an altitude of 5.350 m, Victor Franz (Francis) Hess (1883-1864) discovered the cosmic radiation. His colleagues having continued casting doubts on the existence of such extra-terrestrial impingement for many years, the Austrian scientist was awarded the Nobel Prize for Physics in 1936 only. Victor F. Hess' discovery opened novel fields of research with topics challenging until today. Hess was teaching physics at the Universities of Vienna, Graz, Innsbruck and, from 1938 onwards, of Fordham, New York, and all his life long continued being true to 'his' topic. Suffering himself of radium burns, Hess pioneered to install the first routine measurements of radium poisoning in the USA.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

  10. Mechanical impact of dynamic phenomena in Francis turbines at off design conditions

    Science.gov (United States)

    Duparchy, F.; Brammer, J.; Thibaud, M.; Favrel, A.; Lowys, P. Y.; Avellan, F.

    2017-04-01

    At partial load and overload conditions, Francis turbines are subjected to hydraulic instabilities that can potentially result in high dynamic solicitations of the turbine components and significantly reduce their lifetime. This study presents both experimental data and numerical simulations that were used as complementary approaches to study these dynamic solicitations. Measurements performed on a reduced scale physical model, including a special runner instrumented with on-board strain gauges and pressure sensors, were used to investigate the dynamic phenomena experienced by the runner. They were also taken as reference to validate the numerical simulation results. After validation, advantage was taken from the numerical simulations to highlight the mechanical response of the structure to the unsteady hydraulic phenomena, as well as their impact on the fatigue damage of the runner.

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Science.gov (United States)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

  15. Harry Lee Parker and paroxysmal dysarthria and ataxia.

    Science.gov (United States)

    Klaas, James P; Burkholder, David B; Singer, Wolfgang; Boes, Christopher J

    2013-01-15

    To review descriptions of paroxysmal dysarthria and ataxia in multiple sclerosis (MS), with special attention given to Parker and his 1946 case series. Evaluation of original publications describing paroxysmal dysarthria and ataxia, bibliographic information, writings, and unpublished letters from the Mayo Clinic Historical Unit. In 1940, Störring described a patient with MS with paroxysmal symptoms that included dizziness and trouble speaking, but also unilateral extremity weakness. In 1946, Parker published a series of 11 patients with paroxysmal dysarthria and ataxia. Six of these patients had MS, and he recognized this phenomenon as a manifestation of the disease. The term "paroxysmal dysarthria and ataxia" was first used in 1959 by Andermann and colleagues. Since that time, paroxysmal dysarthria and ataxia has become a well-recognized phenomenon in MS. More recent reports have suggested that the responsible lesion is located in the midbrain, near or involving the red nucleus. Parker was the first to accurately describe paroxysmal dysarthria and ataxia in patients with MS.

  16. What the Butler Saw: Lee Daniels's Studies in Biography and History

    Science.gov (United States)

    Beck, Bernard

    2014-01-01

    The movie "Lee Daniels' The Butler" is an example of a work that is meant not only to entertain but to convey an important attitude and offer important viewpoints. The movie deals with a deep issue in the history of movies and the history of the country: racial inequality. Three issues are discussed in this article: (a) African…

  17. Optimization Evaluation: Lee Chemical Superfund Site, City Of Liberty, Clay County, Missouri

    Science.gov (United States)

    The Lee Chemical Superfund Site (site) is located along Missouri Highway 210 in Liberty, Missouri, approximately 15 miles east of Kansas City, Missouri. Currently, the site is a vacant lot of approximately2.5 acres in a flat alluvial plain.

  18. Forecasting selected specific age mortality rate of Malaysia by using Lee-Carter model

    Science.gov (United States)

    Shukri Kamaruddin, Halim; Ismail, Noriszura

    2018-03-01

    Observing mortality pattern and trend is an important subject for any country to maintain a good social-economy in the next projection years. The declining in mortality trend gives a good impression of what a government has done towards macro citizen in one nation. Selecting a particular mortality model can be a tricky based on the approached method adapting. Lee-Carter model is adapted because of its simplicity and reliability of the outcome results with approach of regression. Implementation of Lee-Carter in finding a fitted model and hence its projection has been used worldwide in most of mortality research in developed countries. This paper studies the mortality pattern of Malaysia in the past by using original model of Lee-Carter (1992) and hence its cross-sectional observation for a single age. The data is indexed by age of death and year of death from 1984 to 2012, in which are supplied by Department of Statistics Malaysia. The results are modelled by using RStudio and the keen analysis will focus on the trend and projection of mortality rate and age specific mortality rate in the future. This paper can be extended to different variants extensions of Lee-Carter or any stochastic mortality tool by using Malaysia mortality experience as a centre of the main issue.

  19. INCA Modelling of the Lee System: strategies for the reduction of nitrogen loads

    Science.gov (United States)

    Flynn, N. J.; Paddison, T.; Whitehead, P. G.

    The Integrated Nitrogen Catchment model (INCA) was applied successfully to simulate nitrogen concentrations in the River Lee, a northern tributary of the River Thames for 1995-1999. Leaching from urban and agricultural areas was found to control nitrogen dynamics in reaches unaffected by effluent discharges and abstractions; the occurrence of minimal flows resulted in an upward trend in nitrate concentration. Sewage treatment works (STW) discharging into the River Lee raised nitrate concentrations substantially, a problem which was compounded by abstractions in the Lower Lee. The average concentration of nitrate (NO3) for the simulation period 1995-96 was 7.87 mg N l-1. Ammonium (NH4) concentrations were simulated less successfully. However, concentrations of ammonium rarely rose to levels which would be of environmental concern. Scenarios were run through INCA to assess strategies for the reduction of nitrate concentrations in the catchment. The conversion of arable land to ungrazed vegetation or to woodland would reduce nitrate concentrations substantially, whilst inclusion of riparian buffer strips would be unsuccessful in reducing nitrate loading. A 50% reduction in nitrate loading from Luton STW would result in a fall of up to 5 mg N l-1 in the reach directly affected (concentrations fell from maxima of 13 to 8 mg N l-1 , nearly a 40 % reduction), whilst a 20% reduction in abstractions would reduce maximum peaks in concentration in the lower Lee by up to 4 mg l-1 (from 17 to 13 mg N l-1, nearly a 25 % reduction),.

  20. Servicing the first web server - Tim Berners-Lee's NeXT

    CERN Multimedia

    unknown, Association aBCM

    2009-01-01

    In August 2009 a team from the Association aBCM in Lausanne came to CERN to give the world's first web server a health check under the watchful eye of web pioneer Robert Cailliau. They took an image of the hard drive at this time, copies of which were given to Robert Cailliau and Tim Berners-Lee.

  1. Charcot, Mitchell and Lees: neurology free thinkers and their experiences of psychoactive drugs

    Directory of Open Access Journals (Sweden)

    Hélio A. G. Teive

    Full Text Available ABSTRACT Three world-famous neurologists, Charcot and Mitchell, in the 19th century, and Lees, in this century, all of whom had great scientific curiosity, experimented with the psychoactive drugs hashish, mescal and yagé, respectively, in an attempt to increase their knowledge of neurological diseases and how the brain works.

  2. Yang-Lee edge singularity on a class of tree-like lattices

    Energy Technology Data Exchange (ETDEWEB)

    Knezevic, Milan; Elezovic-Hadzic, Suncica [Faculty of Physics, University of Belgrade, Belgrade (Yugoslavia)

    1997-03-21

    The density of zeros of the partition function of the Ising model on a class of tree-like lattices is studied. An exact closed-form expression for the pertinent critical exponents is derived by using a couple of recursion relations which have a singular behaviour near the Yang-Lee edge. (author)

  3. Fighting with Reality: Considering Mark Johnson's Pragmatic Realism through Bruce Lee's Jeet Kune Do Method

    Science.gov (United States)

    Miller, Alexander David

    2015-01-01

    This dissertation considers the supportive and complementary relation between Mark Johnson's embodied realism and Bruce Lee's Jeet Kune Do as a philosophical practice. In exploring this relationship, the emphasis on one's embodiment condition and its relationship with metaphor and self-expression are the primary focus. First, this work involves…

  4. Lee-side flow structures of very low aspect ratio cruciform wing–body configurations

    CSIR Research Space (South Africa)

    Tuling, S

    2013-12-01

    Full Text Available OF SPACECRAFT AND ROCKETS Vol. 50, No. 6, November–December 2013 Lee-Side Flow Structures of Very Low Aspect Ratio Cruciform Wing–Body Configurations S. Tuling∗ Council for Scientific and Industrial Research, Pretoria 0001, South Africa L. Dala...

  5. Co-ordinate single-cell expression of LEE4- and LEE5-encoded proteins of Escherichia coli O157:H7.

    Science.gov (United States)

    Roe, Andrew J; Naylor, Stuart W; Spears, Kevin J; Yull, Helen M; Dransfield, Tracy A; Oxford, Matthew; McKendrick, Iain J; Porter, Megan; Woodward, Martin J; Smith, David G E; Gally, David L

    2004-10-01

    Escherichia coli O157:H7 is a zoonotic pathogen that can express a type III secretion system (TTSS) considered important for colonization and persistence in ruminants. E. coli O157:H7 strains have been shown to vary markedly in levels of protein secreted using the TTSS and this study has confirmed that a high secretion phenotype is more prevalent among isolates associated with human disease than isolates shed by healthy cattle. The variation in secretion levels is a consequence of heterogeneous expression, being dependent on the proportion of bacteria in a population that are actively engaged in protein secretion. This was demonstrated by indirect immunofluorescence and eGFP fusions that examined the expression of locus of enterocyte effacement (LEE)-encoded factors in individual bacteria. In liquid media, the expression of EspA, tir::egfp, intimin, but not map::egfp were co-ordinated in a subpopulation of bacteria. In contrast to E. coli O157:H7, expression of tir::egfp in EPEC E2348/69 was equivalent in all bacteria although the same fusion exhibited variable expression when transformed into an E. coli O157:H7 background. An E. coli O157:H7 strain deleted for the LEE demonstrated weak but variable expression of tir::egfp indicating that the elements controlling the heterogeneous expression lie outside the LEE. The research also demonstrated the rapid induction of tir::egfp and map::egfp on contact with bovine epithelial cells. This control in E. coli O157:H7 may be required to limit exposure of key surface antigens, EspA, Tir and intimin during colonization of cattle but allow their rapid production on contact with bovine gastrointestinal epithelium at the terminal rectum.

  6. Diurnal variability of inner-shelf circulation in the lee of a cape under upwelling conditions

    Science.gov (United States)

    Lamas, L.; Peliz, A.; Dias, J.; Oliveira, P. B.; Angélico, M. M.; Castro, J. J.; Fernandes, J. N.; Trindade, A.; Cruz, T.

    2017-07-01

    The nearshore circulation in the lee of a cape under upwelling conditions was studied using in-situ data from 3 consecutive summers (2006-2008). Focus was given to a period between 20 July and 04 August 2006 to study the diurnal variability of the cross-shelf circulation. This period was chosen because it had a steady upwelling-favourable wind condition modulated by a diurnal cycle much similar to sea breeze. The daily variability of the observed cross-shelf circulation consisted of three distinct periods: a morning period with a 3-layer vertical structure with onshore velocities at mid-depth, a mid-day period where the flow is reversed and has a 2-layer structure with onshore velocities at the surface and offshore flow below, and, lastly, in the evening, a 2-layer period with intensified offshore velocities at the surface and onshore flow at the bottom. The observed cross-shelf circulation showed a peculiar vertical shape and diurnal variability different from several other systems described in literature. We hypothesize that the flow reversal of the cross-shelf circulation results as a response to the rapid change of the wind magnitude and direction at mid-day with the presence of the cape north of the mooring site influencing this response. A numerical modelling experiment exclusively forced by winds simulated successfully most of the circulation at the ADCP site, especially the mid-day reversal and the evening's upwelling-type structure. This supports the hypothesis that the cross-shelf circulation at diurnal timescales is mostly wind-driven. By analysing the 3D circulation in the vicinity of Cape Sines we came to the conclusion that the diurnal variability of the wind and the flow interaction with topography are responsible for the circulation variability at the ADCP site, though only a small region in the south of the cape showed a similar diurnal variability. The fact that the wind diurnally undergoes relaxation and intensification strongly affects the

  7. The medical theory of Lee Je-ma and its character

    Directory of Open Access Journals (Sweden)

    LEE Kyung-Lock

    2005-12-01

    Full Text Available Lee Je-ma(李濟馬, 1837-1900 was a prominent scholar as well as an Korean physician He classified every people into four distinctive types: greater yang[tai yang] person, lesser yin[shao yin] person greater yin[tai yin] person, lesser yin[shao yin] person. This theory would dictate proper treatment for each type in accordance with individual differences of physical and temperament features Using these four types he created The Medical Science of Four Types(四象體質論.This article is intended to look into the connection between Lee Je-Ma's 'The Medical Science of Four Types' and 'The Modern' with organizing his ideas about the human body and the human being. Through The Modern, the theory of human being(人間觀 underwent a complete change. Human being in The Premodern, which was determined by sex, age and social status has been changed to the individual human being, which is featured by equality. Lee Je-Ma's medical theory of The Medical Science of Four Types would be analyzed as follow. His concept of human body(人體論 is oriented toward observable objectivity. But on the other hand, it still remains transcendent status of medical science, which is subordinated by philosophy According to Lee Je-Ma's theory of human being human is an equal individual in a modern way of thinking not as a part of hierarchical group. But on the other hand, it still remains incomplete from getting rid of morality aspect that includes virtue and vice in the concept of human body.The common factors in Lee Je-Ma's ideas about the human body and the human being is 'Dualism of mind and body(心身二元論' that means all kinds of status and results depends on each individual. As is stated above, Lee Je-Ma's medical theory has many aspects of The Modern and it proves that Korean traditional medicine could be modernized by itself.

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

    Index Scriptorium Estoniae

    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

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

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

    International Nuclear Information System (INIS)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

  20. Parametric study of the fractional-order Chen-Lee system

    Energy Technology Data Exchange (ETDEWEB)

    Tam, L.M. [Department of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, Av. Padre Tomas Pereira S.J., Taipa, Macau (China)], E-mail: fstlmt@umac.mo; Tou, W.M.S. [Department of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, Av. Padre Tomas Pereira S.J., Taipa, Macau (China)

    2008-08-15

    The dynamics of fractional-order systems have attracted a great deal of attention in recent years. In this paper, the effects of parameter changes on the dynamics of the fractional-order Chen-Lee system were studied numerically. The parameter ranges used were relatively broad. The order used for the system was fixed at 2.7 (q{sub 1} = q{sub 2} = q{sub 3} = 0.9). The system displays rich dynamic behaviors, such as a fixed point, periodic motion (including period-3 motion), chaotic motion, and transient chaos. The chaotic motion identified was validated by the confirmation of a positive Lyapunov exponent. Period-doubling routes to chaos in the fractional-order Chen-Lee system were also found.

  1. Lee Wen: Lucid Dreams In the Reverie of the Real

    OpenAIRE

    Mokhtari, Sylvie

    2012-01-01

    Cette monographie rétrospective réunit la somme des travaux, associant depuis vingt ans performances et installations, de l’artiste singapourien Lee Wen (né en 1957). Ambigu et très expressive, son activité est relatée de manière biographique sous la plume de Khairuddin Hori (« If you can’t think because you can’t chew, try a banana », pp.9-19). Textes de et sur Lee Wen, témoignages, documents et travaux viennent ensuite généreusement nourrir la publication. Des Anthropométries d’Yves Klein, ...

  2. The Brain Dead Patient Is Still Sentient: A Further Reply to Patrick Lee and Germain Grisez.

    Science.gov (United States)

    Austriaco, Nicanor Pier Giorgio

    2016-06-01

    Patrick Lee and Germain Grisez have argued that the total brain dead patient is still dead because the integrated entity that remains is not even an animal, not only because he is not sentient but also, and more importantly, because he has lost the radical capacity for sentience. In this essay, written from within and as a contribution to the Catholic philosophical tradition, I respond to Lee and Grisez's argument by proposing that the brain dead patient is still sentient because an animal with an intact but severed spinal cord can still perceive and respond to external stimuli. The brain dead patient is an unconscious sentient organism. © The Author 2016. Published by Oxford University Press, on behalf of the Journal of Medicine and Philosophy Inc. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  3. Bacterial-Chromatin Structural Proteins Regulate the Bimodal Expression of the Locus of Enterocyte Effacement (LEE Pathogenicity Island in Enteropathogenic Escherichia coli

    Directory of Open Access Journals (Sweden)

    Hervé Leh

    2017-08-01

    Full Text Available In enteropathogenic Escherichia coli (EPEC, the locus of enterocyte effacement (LEE encodes a type 3 secretion system (T3SS essential for pathogenesis. This pathogenicity island comprises five major operons (LEE1 to LEE5, with the LEE5 operon encoding T3SS effectors involved in the intimate adherence of bacteria to enterocytes. The first operon, LEE1, encodes Ler (LEE-encoded regulator, an H-NS (nucleoid structuring protein paralog that alleviates the LEE H-NS silencing. We observed that the LEE5 and LEE1 promoters present a bimodal expression pattern, depending on environmental stimuli. One key regulator of bimodal LEE1 and LEE5 expression is ler expression, which fluctuates in response to different growth conditions. Under conditions in vitro considered to be equivalent to nonoptimal conditions for virulence, the opposing regulatory effects of H-NS and Ler can lead to the emergence of two bacterial subpopulations. H-NS and Ler share nucleation binding sites in the LEE5 promoter region, but H-NS binding results in local DNA structural modifications distinct from those generated through Ler binding, at least in vitro. Thus, we show how two nucleoid-binding proteins can contribute to the epigenetic regulation of bacterial virulence and lead to opposing bacterial fates. This finding implicates for the first time bacterial-chromatin structural proteins in the bimodal regulation of gene expression.

  4. Grape marc, wine lees and deposit of the must: How to manage oenological by-products?

    OpenAIRE

    Lempereur Valérie; Penavayre Sophie

    2014-01-01

    Winemaking produces solid (grape marc) and liquid (wine lees and deposit of the must) wastes named “oenological by-products”, which, according to European regulations, must be eliminated following the environmental regulatory requirement [1]. In France, these European regulations forced wine growers, until the 2013/2014 campaign, to deliver all by-products to wine distilleries. This French obligation is known as the “prestation vinique” [2, 3]. Following the Common Market Organisation wine re...

  5. LEE: Light‐Weight Energy‐Efficient encryption algorithm for sensor networks

    OpenAIRE

    Komninos, N.; Soroush, H.; Salajegheh, M.

    2007-01-01

    Data confidentiality in wireless sensor networks is mainly achieved by RC5 and Skipjack encryption algorithms. However, both algorithms have their weaknesses, for example RC5 supports variable-bit rotations, which are computationally expensive operations and Skipjack uses a key length of 80-bits, which is subject to brute force attack. In this paper we introduce a light-weight energy- fficient encryption-algorithm (LEE) for tiny embedded devices, such as sensor network nodes. We present exper...

  6. Nobelist TD LEE Scientist Cooperation Network and Scientist Innovation Ability Model

    OpenAIRE

    Fang, Jin-Qing; Liu, Qiang

    2013-01-01

    Nobelist TD Lee scientist cooperation network (TDLSCN) and their innovation ability are studied. It is found that the TDLSCN not only has the common topological properties both of scale-free and small-world for a general scientist cooperation networks, but also appears the creation multiple-peak phenomenon for number of published paper with year evolution, which become Nobelist TD Lee’s significant mark distinguished from other scientists. This new phenomenon has not been revealed in the scie...

  7. Becoming an International Scientist in South Korea: Ho Wang Lee's Research Activity about Epidemic Hemorrhagic Fever.

    Science.gov (United States)

    Shin, Miyoung

    2017-04-01

    In the 1960-70s, South Korea was still in the position of a science latecomer. Although the scientific research environment in South Korea at that time was insufficient, there was a scientist who achieved outcomes that could be recognized internationally while acting in South Korea. He was Ho Wang Lee(1928~ ) who found Hantann Virus that causes epidemic hemorrhagic fever for the first time in the world. It became a clue to identify causative viruses of hemorrhagic diseases that were scattered here and there throughout the world. In addition, these outcomes put Ho Wang Lee on the global center of research into epidemic hemorrhagic fever. This paper examines how a Korean scientist who was in the periphery of virology could go into the central area of virology. Also this article shows the process through which the virus found by Ho Wang Lee was registered with the international academia and he proceeded with follow-up research based on this progress to reach the level at which he generalized epidemic hemorrhagic fever related studies throughout the world. While he was conducting the studies, experimental methods that he had never experienced encountered him as new difficulties. He tried to solve the new difficulties faced in his changed status through devices of cooperation and connection. Ho Wang Lee's growth as a researcher can be seen as well as a view of a researcher that grew from a regional level to an international level and could advance from the area of non-mainstream into the mainstream. This analytic tool is meaningful in that it can be another method of examining the growth process of scientists in South Korea or developing countries.

  8. Outlining the influence of non-conventional yeasts in wine ageing over lees.

    Science.gov (United States)

    Belda, Ignacio; Navascués, Eva; Marquina, Domingo; Santos, Antonio; Calderón, Fernando; Benito, Santiago

    2016-07-01

    During the last decade, the use of innovative yeast cultures of both Saccharomyces cerevisiae and non-Saccharomyces yeasts as alternative tools to manage the winemaking process have turned the oenology industry. Although the contribution of different yeast species to wine quality during fermentation is increasingly understood, information about their role in wine ageing over lees is really scarce. This work aims to analyse the incidence of three non-Saccharomyces yeast species of oenological interest (Torulaspora delbrueckii, Lachancea thermotolerans and Metschnikowia pulcherrima) and of a commercial mannoprotein-overproducer S. cerevisiae strain compared with a conventional industrial yeast strain during wine ageing over lees. To evaluate their incidence in mouthfeel properties of wine after 4 months of ageing, the mannoprotein content of wines was evaluated, together with other wine analytic parameters, such as colour and aroma, biogenic amines and amino acids profile. Some differences among the studied parameters were observed during the study, especially regarding the mannoprotein concentration of wines. Our results suggest that the use of T. delbrueckii lees in wine ageing is a useful tool for the improvement of overall wine quality by notably increasing mannoproteins, reaching values higher than obtained using a S. cerevisiae overproducer strain. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.

  9. An unusual feature associated with LEE1 P1 promoters in enteropathogenic Escherichia coli (EPEC).

    Science.gov (United States)

    Jeong, Jae-Ho; Kim, Hyun-Ju; Kim, Kun-Hee; Shin, Minsang; Hong, Yeongjin; Rhee, Joon Haeng; Schneider, Thomas D; Choy, Hyon E

    2012-02-01

    Transcription start points in bacteria are influenced by the nature of the RNA polymerase·promoter interaction. For Escherichia coli RNA polymerase holoenzyme containing σ70, it is presumed that specific sequence in one or more of the -10, extended -10 and -35 elements of the promoter guides the RNAP to select the cognate start point. Here, we investigated the promoter driving expression of the LEE1 operon in enteropathogenic E. coli and found two promoters separated by 10 bp, LEE1 P1A (+1) and LEE1 P1B (+10) using various in vitro biochemical tools. A unique feature of P1B was the presence of multiple transcription starts from five neighbouring As at the initial transcribed region. The multiple products did not arise from stuttering synthesis. Analytical software based on information theory was employed to determine promoter elements. The concentration of the NTP pool altered the preferred transcription start points, albeit the underlying mechanism is elusive. Under in vivo conditions, dominant P1B, but not P1A, was subject to regulation by IHF. © 2012 Blackwell Publishing Ltd.

  10. Observation of Mountain Lee Waves with MODIS NIR Column Water Vapor

    Science.gov (United States)

    Lyapustin, A.; Alexander, M. J.; Ott, L.; Molod, A.; Holben, B.; Susskind, J.; Wang, Y.

    2014-01-01

    Mountain lee waves have been previously observed in data from the Moderate Resolution Imaging Spectroradiometer (MODIS) "water vapor" 6.7 micrometers channel which has a typical peak sensitivity at 550 hPa in the free troposphere. This paper reports the first observation of mountain waves generated by the Appalachian Mountains in the MODIS total column water vapor (CWV) product derived from near-infrared (NIR) (0.94 micrometers) measurements, which indicate perturbations very close to the surface. The CWV waves are usually observed during spring and late fall or some summer days with low to moderate CWV (below is approx. 2 cm). The observed lee waves display wavelengths from3-4 to 15kmwith an amplitude of variation often comparable to is approx. 50-70% of the total CWV. Since the bulk of atmospheric water vapor is confined to the boundary layer, this indicates that the impact of thesewaves extends deep into the boundary layer, and these may be the lowest level signatures of mountain lee waves presently detected by remote sensing over the land.

  11. Forecasting the mortality rates using Lee-Carter model and Heligman-Pollard model

    Science.gov (United States)

    Ibrahim, R. I.; Ngataman, N.; Abrisam, W. N. A. Wan Mohd

    2017-09-01

    Improvement in life expectancies has driven further declines in mortality. The sustained reduction in mortality rates and its systematic underestimation has been attracting the significant interest of researchers in recent years because of its potential impact on population size and structure, social security systems, and (from an actuarial perspective) the life insurance and pensions industry worldwide. Among all forecasting methods, the Lee-Carter model has been widely accepted by the actuarial community and Heligman-Pollard model has been widely used by researchers in modelling and forecasting future mortality. Therefore, this paper only focuses on Lee-Carter model and Heligman-Pollard model. The main objective of this paper is to investigate how accurately these two models will perform using Malaysian data. Since these models involves nonlinear equations that are explicitly difficult to solve, the Matrix Laboratory Version 8.0 (MATLAB 8.0) software will be used to estimate the parameters of the models. Autoregressive Integrated Moving Average (ARIMA) procedure is applied to acquire the forecasted parameters for both models as the forecasted mortality rates are obtained by using all the values of forecasted parameters. To investigate the accuracy of the estimation, the forecasted results will be compared against actual data of mortality rates. The results indicate that both models provide better results for male population. However, for the elderly female population, Heligman-Pollard model seems to underestimate to the mortality rates while Lee-Carter model seems to overestimate to the mortality rates.

  12. Lee Miller à travers la Roumanie, l’appareil photo à la main (1946

    Directory of Open Access Journals (Sweden)

    Adrian-Silvan Ionescu

    2012-01-01

    Full Text Available A former model and fashion photographer turned war photographer, Lee Miller visited Romania twice, in 1938 and 1946 respectively. After her second visit she published her impressions and pictures, under the title of Roumania, in Vogue magazine. Besides the published material there are her manuscripts from The Lee Miller Achives at Farley Farm House, East Sussex, England, on which this paper is based. She crossed the border coming from Hungary in early February 1946. Heading for Sibiu her car, a Chevrolet Sedan, slipping on the ice-covered road, stopped on a snowbank far off in the ditch. While looking for help in the nearby village she and her companions left the car unguarded to discover it plundered of everything, wheels included.On a Sunday afternoon she had the privilege of being received by King Mihai I and Queen Mother Elena with whom she talked exstensively. She also took magnificent pictures with the Royal Family in the imposing Peleş Castle. At Sinaia, „the summer capital of Roumania” she had also the opportunity to portray Dinu Brătianu and Iuliu Maniu, the two elderly statesmen. Maniu was surrounded by friends and party members, among whom was young Corneliu Coposu, his private secretary.Moving to Bucharest, she met old friends such as Harri Brauner and his wife, Lena Constante, with whom she wandered through the country eight years ago. Lena and Elena Pătrășcanu, wife of Lucrețiu Pătrășcanu, Minister of Justice, have started a successful marionette theatre where Lee took nice pictures. Other were taken on the streets, with peasants, street vendors and their customers. Harri took her to a bistro where they met Maria Lătărețu, the celebrating folk singer whom Brauner recorded many times. They enjoyed her songs. Suffering from fibrositis, Lee Miller undertook a peculiar treatment in a gypsy village where the inhabitants were dancing bears trainers. She was massaged by a bear weighing about 300 pounds while Brauner took

  13. 78 FR 77508 - Duke Energy Carolinas, LLC; William States Lee III Nuclear Station, Units 1 and 2; Combined...

    Science.gov (United States)

    2013-12-23

    ... From the Federal Register Online via the Government Publishing Office NUCLEAR REGULATORY COMMISSION Duke Energy Carolinas, LLC; William States Lee III Nuclear Station, Units 1 and 2; Combined Licenses Application Review AGENCY: Nuclear Regulatory Commission. ACTION: Final environmental impact...

  14. H-NST induces LEE expression and the formation of attaching and effacing lesions in enterohemorrhagic Escherichia coli.

    Directory of Open Access Journals (Sweden)

    Jonathan A Levine

    Full Text Available Enteropathogenic E. coli (EPEC and enterohemorrhagic E. coli are important causes of morbidity and mortality worldwide. These enteric pathogens contain a type III secretion system (T3SS responsible for the attaching and effacing (A/E lesion phenotype. The T3SS is encoded by the locus of enterocyte effacement (LEE pathogenicity island. The H-NS-mediated repression of LEE expression is counteracted by Ler, the major activator of virulence gene expression in A/E pathogens. A regulator present in EPEC, H-NST, positively affects expression of H-NS regulon members in E. coli K-12, although the effect of H-NST on LEE expression and virulence of A/E pathogens has yet-to-be determined.We examine the effect of H-NST on LEE expression and A/E lesion formation on intestinal epithelial cells. We find that H-NST positively affects the levels of LEE-encoded proteins independently of ler and induces A/E lesion formation. We demonstrate H-NST binding to regulatory regions of LEE1 and LEE3, the first report of DNA-binding by H-NST. We characterize H-NST mutants substituted at conserved residues including Ala16 and residues Arg60 and Arg63, which are part of a potential DNA-binding domain. The single mutants A16V, A16L, R60Q and the double mutant R60Q/R63Q exhibit a decreased effect on LEE expression and A/E lesion formation. DNA mobility shift assays reveal that these residues are important for H-NST to bind regulatory LEE DNA targets. H-NST positively affects Ler binding to LEE DNA in the presence of H-NS, and thereby potentially helps Ler displace H-NS bound to DNA.H-NST induces LEE expression and A/E lesion formation likely by counteracting H-NS-mediated repression. We demonstrate that H-NST binds to DNA and identify arginine residues that are functionally important for DNA-binding. Our study suggests that H-NST provides an additional means for A/E pathogens to alleviate repression of virulence gene expression by H-NS to promote virulence capabilities.

  15. H-NST induces LEE expression and the formation of attaching and effacing lesions in enterohemorrhagic Escherichia coli.

    Science.gov (United States)

    Levine, Jonathan A; Hansen, Anne-Marie; Michalski, Jane M; Hazen, Tracy H; Rasko, David A; Kaper, James B

    2014-01-01

    Enteropathogenic E. coli (EPEC) and enterohemorrhagic E. coli are important causes of morbidity and mortality worldwide. These enteric pathogens contain a type III secretion system (T3SS) responsible for the attaching and effacing (A/E) lesion phenotype. The T3SS is encoded by the locus of enterocyte effacement (LEE) pathogenicity island. The H-NS-mediated repression of LEE expression is counteracted by Ler, the major activator of virulence gene expression in A/E pathogens. A regulator present in EPEC, H-NST, positively affects expression of H-NS regulon members in E. coli K-12, although the effect of H-NST on LEE expression and virulence of A/E pathogens has yet-to-be determined. We examine the effect of H-NST on LEE expression and A/E lesion formation on intestinal epithelial cells. We find that H-NST positively affects the levels of LEE-encoded proteins independently of ler and induces A/E lesion formation. We demonstrate H-NST binding to regulatory regions of LEE1 and LEE3, the first report of DNA-binding by H-NST. We characterize H-NST mutants substituted at conserved residues including Ala16 and residues Arg60 and Arg63, which are part of a potential DNA-binding domain. The single mutants A16V, A16L, R60Q and the double mutant R60Q/R63Q exhibit a decreased effect on LEE expression and A/E lesion formation. DNA mobility shift assays reveal that these residues are important for H-NST to bind regulatory LEE DNA targets. H-NST positively affects Ler binding to LEE DNA in the presence of H-NS, and thereby potentially helps Ler displace H-NS bound to DNA. H-NST induces LEE expression and A/E lesion formation likely by counteracting H-NS-mediated repression. We demonstrate that H-NST binds to DNA and identify arginine residues that are functionally important for DNA-binding. Our study suggests that H-NST provides an additional means for A/E pathogens to alleviate repression of virulence gene expression by H-NS to promote virulence capabilities.

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

    Science.gov (United States)

    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

  17. Engineering diagnostics for vortex-induced stay vanes cracks in a Francis turbine

    Science.gov (United States)

    D'Agostini Neto, Alexandre; Gissoni, Humberto, Dr.; Gonçalves, Manuel, Dr.; Cardoso, Rogério; Jung, Alexander, Dr.; Meneghini, Julio, Prof.

    2016-11-01

    Despite the fact that vortex-induced vibration (VIV) in hydraulic turbines components (especially in stay vanes) is a well-known phenomenon, it still remains challenging for operation and maintenance teams in several power plants around the world. Since the first publication of a similar problem in 1967, literature shows that at least 27 other turbines witnessed strong stay vane vibrations associated with vortex shedding. Recurrent stay vane cracks in a 250 MW Francis turbine in Brazil motivated an engineering study involving prototype measurements, structural and Computational Fluid Dynamics (CFD) analysis in order to determine a proper geometry modification that could eliminate the periodic vortex wake generated at the stay vanes trailing edge. First cracks appeared in 1978 just after the machine was put into operation. A study published in 1982 associated these cracks with dynamic excitations caused by the water flow at high flow conditions. New stay vane profiles were proposed and executed as well as improved welding recommendations. Cracks however, continued to appear requiring welding repairs roughly every two years. Although Voith Hydro was not the original equipment manufacturer for these units, the necessary information was available to study the issue and propose and execute new stay vane profiles. This paper details the approach taken for the study. First, indirect vibration measurements were used to determine vibration frequencies to help to characterize the affected mode shapes. These results were compared to finite element (FE) calculations. Strain gage measurements performed afterwards confirmed the conclusions of this analysis. Next, transient CFD calculations were run to reproduce the measured phenomenon and to serve as a basis for a new stay vane geometry. This modification was then implemented in the actual turbine stay vanes. A new set of indirect vibration measurements indicated the effectiveness of the proposed solution. Final confirmation

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    Sutikno, Priyono

    2010-06-01

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

  1. Politics and the New African Novel: A Study of the Fiction of Francis Bebey

    Directory of Open Access Journals (Sweden)

    W. Curtis Schade

    1980-01-01

    Full Text Available From its inception African fiction has been strongly marked by political themes. In the late 1950's the virulent satire of Mongo Béti and Ferdinand Oyono stated the case against the denigration of African values inherent in all aspects of the colonial system. Their style and message subsequently gave way to novels focusing upon the drama of the transition of power at the moment of Independence. Whether optimistic or disillusioned, many of these novels featured real events and people, often thinly disguised, and sought to give an «inside» picture of that historical moment. Other tendencies developed in the late 60's, most notably a strongly autocritical, often radical, body of fiction represented by such writers as Ousmane Sembène and Alioum Fangouré, and the more distant, philosophical study of politics and society of writers like Ahmadou Kourouma. In all of these examples the contemporary political situation, whether viewed globally or as it affected the life of a simple man, was the primary moving force within the novel. By contrast, this paper will concentrate upon the work of Francis Bebey, exemplary of another current trend, fiction which, while continuing to deal with political concerns, does so in a different light, creating different tones, using different techniques. In the three novels and one short-story studied, politics is subordinated to other concerns and is treated less reverently than heretofore. We see in the work of Bebey a re-assessment of politics and its place in the life of contemporary (African man.

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

    Science.gov (United States)

    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

  3. Prevalence of hyperglycaemia first detected during pregnancy and subsequent obstetric outcomes at St. Francis Hospital Nsambya.

    Science.gov (United States)

    Nakabuye, Betty; Bahendeka, Silver; Byaruhanga, Romano

    2017-05-02

    Women with hyperglycaemia detected during pregnancy are at greater risk for adverse pregnancy outcomes. Data on hyperglycaemia in pregnancy in sub-Saharan Africa is scanty and varied depending on the populations studied and the methodologies used to define hyperglycaemia in pregnancy. With the recent 2013 World Health Organisation (WHO) diagnostic criteria and classification, there is yet no sufficient data on the prevalence of hyperglycaemia in sub-Saharan Africa. The objective was to determine the prevalence of Hyperglycaemia first detected during pregnancy and subsequent obstetric outcomes among patients attending antenatal care (ANC) at St. Francis Hospital Nsambya. A prospective cohort study. All women with no history of diabetes mellitus attending at or after 24 weeks gestation were eligible to participate in the study. Participants underwent a standard 75 g oral glucose tolerance test (OGTT) after an informed written consent. The primary outcome was diagnosis of hyperglycaemia. Enrolled participants were followed up to delivery to assess obstetric outcomes (secondary outcomes were birth weight, neonatal admission, maternal genital trauma, delivery mode, neonatal and maternal status at discharge). 251 women were screened between December 2013 and February 2014. The prevalence of hyperglycaemia first detected in pregnancy was 31.9%. We found 23.8 % of women with hyperglycaemia had no known risk factor. Macrosomia was the only obstetric outcome that was significantly associated with hyperglycaemia. The prevalence of hyperglycaemia first detected in pregnancy was high in the studied population. Clinicians, therefore, should become more vigilant to screen for the condition. Selective screening may miss 23.8% of pregnant women with hyperglycaemia. However the cost/benefit implications of screening strategy and the recent 2013 WHO diagnostic criteria need to be studied in our setting.

  4. 'Items for criticism (not in sequence)': Joseph DeLee, Pare Lorentz and The Fight for Life (1940).

    Science.gov (United States)

    Gainty, Caitjan

    2017-09-01

    In the late 1920s, the American obstetrician Joseph DeLee brought the motion-picture camera into the birth room. Following that era's trend of adapting industrial efficiency practices for medical environments, DeLee's films give spectacular and unexpected expression to the engineering concept of 'streamlining'. Accomplishing what more tangible obstetric streamlining practices had failed to, DeLee's cameras, and his post-production manipulation, shifted birth from messy and dangerous to rationalized, efficient, death-defying. This was film as an active and effective medical tool. Years later, the documentarian Pare Lorentz produced and wrote his own birth film, The Fight for Life (1940). The documentary subject of the film was DeLee himself, and the film was set in his hospitals, on the same maternity 'sets' that had once showcased film's remarkable streamlining capacity to give and keep life. Yet relatively little of DeLee was retained in the film's content, resulting in a showdown that, by way of contrast, further articulated DeLee's understanding of film's medical powers and, in so doing, hinted at a more dynamic moment in the history of medicine while speaking also to the process by which that understanding ceased to be historically legible.

  5. Characterization of Fish Passage Conditions through a Francis Turbine and Regulating Outlet at Cougar Dam, Oregon, Using Sensor Fish, 2009–2010

    Energy Technology Data Exchange (ETDEWEB)

    Duncan, Joanne P.

    2011-05-23

    Fish passage conditions through a Francis turbine and a regulating outlet (RO) at Cougar Dam on the south fork of the McKenzie River in Oregon were evaluated by Pacific Northwest National Laboratory for the U.S. Army Corps of Engineers, Portland District, using Sensor Fish devices. The objective of the study was to describe and compare passage exposure conditions, identifying potential fish injury regions encountered during passage via specific routes. The RO investigation was performed in December 2009 and the turbine evaluation in January 2010, 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 collision, strike, 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 Cougar Dam indicates that the RO passage route through the 3.7-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 passage. Compared to mainstem Columbia River passage routes, none of the Cougar Dam passage routes as tested are safe for juvenile salmonid passage.

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

    Energy Technology Data Exchange (ETDEWEB)

    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. The Effect of Selected Cleaning Techniques on Berkshire Lee Marble: A Scientific Study at Philadelphia City Hall

    Science.gov (United States)

    Mossotti, Victor G.; Eldeeb, A. Raouf; Fries, Terry L.; Coombs, Mary Jane; Naude, Virginia N.; Soderberg, Lisa; Wheeler, George S.

    2002-01-01

    This report describes a scientific investigation of the effects of eight different cleaning techniques on the Berkshire Lee marble component of the facade of the East Center Pavilion at Philadelphia City Hall; the study was commissioned by the city of Philadelphia. The eight cleaning techniques evaluated in this study were power wash (proprietary gel detergent followed by water rinse under pressure), misting (treatment with potable, nebulized water for 24-36 hours), gommage (proprietary Thomann-Hanry low-pressure, air-driven, small-particle, dry abrasion), combination (gommage followed by misting), Armax (sodium bicarbonate delivered under pressure in a water wash), JOS (dolomite powder delivered in a low-pressure, rotary-vortex water wash), laser (thermal ablation), and dry ice (powdered-dry-ice abrasion delivered under pressure). In our study approximately 160 cores were removed from the building for laboratory analysis. We developed a computer program to analyze scanning-electron-micrograph images for the microscale surface roughness and other morphologic parameters of the stone surface, including the near-surface fracture density of the stone. An analysis of more than 1,100 samples cut from the cores provided a statistical basis for crafting the essential elements of a reduced-form, mixed-kinetics conceptual model that represents the deterioration of calcareous stone in terms of self-organized soiling and erosion patterns. This model, in turn, provided a basis for identifying the variables that are affected by the cleaning techniques and for evaluating the extent to which such variables influence the stability of the stone. The model recognizes three classes of variables that may influence the soiling load on the stone, including such exogenous environmental variables as airborne moisture, pollutant concentrations, and local aerodynamics, and such endogenous stone variables as surface chemistry and microstructure (fracturing, roughness, and so on). This study

  8. Lee Sang Gak Telescope (LSGT): A Remotely Operated Robotic Telescope for Education and Research at Seoul National University

    Science.gov (United States)

    Im, Myungshin; Choi, Changsu; Kim, Kihyun

    2015-08-01

    We introduce the Lee Sang Gak Telescope (LSGT), a remotely operated, robotic 0.43-meter telescope. The telescope was installed at the Siding Spring Observatory, Australia, in 2014 October, to secure regular and exclusive access to the dark sky and excellent atmospheric conditions in the southern hemisphere from the Seoul National University (SNU) campus. Here, we describe the LSGT system and its performance, present example images from early observations, and discuss a future plan to upgrade the system. The use of the telescope includes (i) long-term monitoring observations of nearby galaxies, active galactic nuclei, and supernovae; (ii) rapid follow-up observations of transients such as gamma-ray bursts and gravitational wave sources; and (iii) observations for educational activities at SNU. Based on observations performed so far, we find that the telescope is capable of providing images to a depth of R=21.5 mag (point source detection) at 5-σ with 15 min total integration time under good obs-erving conditions.

  9. Generation of hyperchaos from the Chen-Lee system via sinusoidal perturbation

    Energy Technology Data Exchange (ETDEWEB)

    Tam, L.M. [Department of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, Av. Padre Thomas Pereira S.J., Taipa, Macau (China)], E-mail: fstlmt@umac.mo; Chen, J.H. [Department of Mechanical Engineering, Chung Hua University, Hsinchu, Taiwan (China); Chen, H.K. [Department of Mechanical Engineering, Hsiuping Institute of Technology, Taichung, Taiwan (China); Wai Meng Si Tou [Department of Electromechanical Engineering, Faculty of Science and Technology, University of Macau, Av. Padre Thomas Pereira S.J., Taipa, Macau (China)

    2008-11-15

    A system with more than one positive Lyapunov exponent can be classified as a hyperchaotic system. In this study, a sinusoidal perturbation was designed for generating hyperchaos from the Chen-Lee chaotic system. The hyperchaos was identified by the existence of two positive Lyapunov exponents and bifurcation diagrams. The system is hyperchaotic in several different regions of the parameters c, {epsilon}, and {omega}. It was found that this method not only can enhance or suppress chaotic behavior, but also induces chaos in non-chaotic parameter ranges. In addition, two interesting dynamical behaviors, Hopf bifurcation and intermittency, were also found in this study.

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

    Science.gov (United States)

    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.

  11. As teorias da matéria de Francis Bacon e Robert Boyle: forma, textura e atividade

    OpenAIRE

    Luciana Zaterka

    2012-01-01

    O presente estudo pretende contribuir para o entendimento da química seiscentista, especialmente para aspectos das teorias da matéria presentes nas obras de Francis Bacon (1561-1626) e Robert Boyle (16271691). Considerados protagonistas da filosofia experimental na revolução científica da modernidade, esses autores podem enriquecer nossa compreensão da gênese teórica e histórica da química moderna. De fato, notaremos como suas respectivas noções de "forma" deixarão gradualmente de ter uma sig...

  12. Francis Bacon e O progresso do conhecimento no início do século XVII

    OpenAIRE

    Cristiane de Melo Shirayama

    2016-01-01

    Neste trabalho, trazemos uma análise da obra O Progresso do Conhecimento, publicada em 1605, pelo filósofo e político Francis Bacon (1561-1626). Nosso objetivo é explorar as ideias contidas nesse importante livro de Bacon a fim de relacioná-las com intenções mais gerais desse pensador, no plano de um projeto para a ciência, e com o momento histórico em que ele viveu, em especial a Reforma Protestante e suas consequências para o Estado inglês. Para atingir nosso objetivo, fizemos inicialmente ...

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

    Science.gov (United States)

    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

    Directory of Open Access Journals (Sweden)

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

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    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

  16. Visioni vittoriane: il paesaggio fiorentino nelle opere di Janet Ross e Vernon Lee

    Directory of Open Access Journals (Sweden)

    Gabriele Corsani

    2015-11-01

    Full Text Available Fra l’ultimo scorcio dell’Ottocento e i primi decenni del Novecento Firenze e i suoi dintorni sono il soggetto privilegiato di una grande quantità di descrizioni, note di diario, racconti, opera di scrittori stranieri, in particolare inglesi, che si radicano nell’approdo elettivo di quei luoghi. Il testo presenta la traccia letteraria del paesaggio fiorentino nelle opere di Vernon Lee e Janet Ross, due tipiche rappresentanti di questa tendenza che hanno vissuto, attraverso vicende biografiche in qualche modo parallele, un’esperienza di intensa identificazione con il paesaggio fiorentino. Di Janet Ross, viene commentato Old Florence and Modern Tuscany, volume che raccoglie una serie di articoli pubblicati su alcune riviste inglesi e fornisce una efficace panoramica sull’interesse molto concreto di Janet Ross per il mondo rurale che la vede addirittura impegnata nella gestione della fattoria di Castagnolo, a Lastra a Signa. Più sfaccettato è il commento alle opere di Vernon Lee, di cui sono commentati passi da Vanitas. Polite Stories, Genius Loci, Hortus Vitae and Limbo, in virtù della maggiore ampiezza e complessità del suo mondo culturale. Ne sono cifra distintiva la associazione fra storia e realtà attraverso la dimensione del mistero, che risulta una delle chiavi di acccesso alla bellezza e alla vitalità del paesagggio e la capacità di cogliere il ritmo proprio dei luoghi e di entrare in reale sintonia con essi. 

  17. Electricity generation using white and red wine lees in air cathode microbial fuel cells

    Science.gov (United States)

    Pepe Sciarria, Tommy; Merlino, Giuseppe; Scaglia, Barbara; D'Epifanio, Alessandra; Mecheri, Barbara; Borin, Sara; Licoccia, Silvia; Adani, Fabrizio

    2015-01-01

    Microbial fuel cell (MFC) is a useful biotechnology to produce electrical energy from different organic substrates. This work reports for the first time results of the application of single chamber MFCs to generate electrical energy from diluted white wine (WWL) and red wine (RWL) lees. Power obtained was of 8.2 W m-3 (262 mW m-2; 500 Ω) and of 3.1 W m-3 (111 mW m-2; 500Ω) using white and red wine lees, respectively. Biological processes lead to a reduction of chemical oxygen (TCOD) and biological oxygen demand (BOD5) of 27% and 83% for RWL and of 90% and 95% for WWL, respectively. These results depended on the degradability of organic compounds contained, as suggest by BOD5/TCOD of WWL (0.93) vs BOD5/TCOD of RWL (0.33), and to the high presence of polyphenols in RWL that inhibited the process. Coulombic efficiency (CE) of 15 ± 0%, for WWL, was in line with those reported in the literature for other substrates, i.e. CE of 14.9 ± 11.3%. Different substrates led to different microbial consortia, particularly at the anode. Bacterial species responsible for the generation of electricity, were physically connected to the electrode, where the direct electron transfer took place.

  18. Grape marc, wine lees and deposit of the must: How to manage oenological by-products?

    Directory of Open Access Journals (Sweden)

    Lempereur Valérie

    2014-01-01

    Full Text Available Winemaking produces solid (grape marc and liquid (wine lees and deposit of the must wastes named “oenological by-products”, which, according to European regulations, must be eliminated following the environmental regulatory requirement [1]. In France, these European regulations forced wine growers, until the 2013/2014 campaign, to deliver all by-products to wine distilleries. This French obligation is known as the “prestation vinique” [2, 3]. Following the Common Market Organisation wine reform, a consultation was initiated by FranceAgriMer on the potential value of oenological by-products. The French Institute of Vine and Wine (IFV coordinated a national experimentation from 2010 to 2013 about recovery of by-products, with the support of members of the Technical Group: Association des Viticulteurs d'Alsace (AVA, Comité Interprofessionnel du Vin de Champagne (CIVC, Institut Technique des Corps Gras (ITERG, et Union Nationale des Groupements de Distillateurs d'Alcool (UNGDA. Distillation of grape marc and wine lees spreading and composting, and anaerobic digestion of grape marc were studied in order to answer the following questions: What technical feasibility? What environmental impact? What cost for winegrowers? What conformity with the regulations, including environmental regulatory obligations? [4].

  19. South Korean Government under the former CEO, President Lee Myung-bak

    Directory of Open Access Journals (Sweden)

    Eunsook Yang

    2008-10-01

    Full Text Available Tras un prometedor inicio gracias a su arrolladora victoria en diciembre del 2007 y portando un mandato para llevar a cabo profundas reformas económicas, el presidente Lee Myung-bak se ha visto obligado a recuperar la confianza de su ciudadanía tras las duras críticas a numerosos aspectos de su política: la importación de carne vacuna bajo el Tratado de Libre Comercio EEUU-Corea del Sur pendiente de aprobación, sus ambiciosos proyectos de construcción, su agenda de privatizaciones y su estilo algo autoritario. Las características de su política exterior resultan interesantes por los contrastes con su predecesor: refuerzo de la alianza con los EEUU, mejora de las relaciones con Japón, mayor dinamismo en su diplomacia energética hacia Rusia, mayor envergadura a su relación con China y una postura más firme hacia Corea del Norte. Sin embargo Lee Myung-bak ha de superar el desafío que la crisis económica mundial le presenta y así poder restaurar la situación económica de su país.

  20. Vitis vinifera L. cv Pinot noir pomace and lees as potential sources of bioactive compounds.

    Science.gov (United States)

    Reis, Gabriel M; Faccin, Henrique; Viana, Carine; Rosa, Marcelo Barcellos da; de Carvalho, Leandro M

    2016-11-01

    Food and agricultural industries generate substantial quantities of phenolic-rich by-products that could be valuable natural sources of antioxidants. The aim of this study was to identify and quantify the phenolic compounds and radical scavenging activities of two by-products (pomace and lees) from Vitis vinifera L. cv Pinot noir. We found a different distribution of phenolic classes (flavanols, flavonols, phenolic acids and stilbenes) and singular scavenging activity against free radicals (hydroxyl, superoxide and peroxyl radicals). The major class of phenolics in pomace was flavanols and in lees was flavonols, with catechin (117.9 ± 2.5 μg g(-1)) and quercetin (42.4 ± 1.2 μg g(-1)) being the most abundant individual compounds. We also found high potential on scavenging activity against superoxide radicals in pomace (80% of scavenging activity) and radical peroxyl (67% scavenging activity). These results show the possibility of using Pinot noir by-products as promising additives or as a source for the development of new products in different segments of the food and cosmetic industries.

  1. Nonsingular cosmology with a scale-invariant spectrum of cosmological perturbations from Lee-Wick theory

    International Nuclear Information System (INIS)

    Cai Yifu; Qiu Taotao; Brandenberger, Robert; Zhang Xinmin

    2009-01-01

    We study the cosmology of a Lee-Wick type scalar field theory. First, we consider homogeneous and isotropic background solutions and find that they are nonsingular, leading to cosmological bounces. Next, we analyze the spectrum of cosmological perturbations which result from this model. Unless either the potential of the Lee-Wick theory or the initial conditions are finely tuned, it is impossible to obtain background solutions which have a sufficiently long period of inflation after the bounce. More interestingly, however, we find that in the generic noninflationary bouncing cosmology, perturbations created from quantum vacuum fluctuations in the contracting phase have the correct form to lead to a scale-invariant spectrum of metric inhomogeneities in the expanding phase. Since the background is nonsingular, the evolution of the fluctuations is defined unambiguously through the bounce. We also analyze the evolution of fluctuations which emerge from thermal initial conditions in the contracting phase. The spectrum of gravitational waves stemming from quantum vacuum fluctuations in the contracting phase is also scale-invariant, and the tensor to scalar ratio is not suppressed.

  2. Polyphenols from Wine Lees as a Novel Functional Bioactive Compound in the Protection Against Oxidative Stress and Hyperlipidaemia

    Directory of Open Access Journals (Sweden)

    Irena Landeka Jurčević

    2017-01-01

    Full Text Available The study examines the potential of wine industry by-product, the lees, as a rich mixture of natural polyphenols, and its physiological potential to reduce postprandial metabolic and oxidative stress caused by a cholesterol-rich diet in in vivo model. Chemical analysis of wine lees showed that their total solid content was 94.2 %. Wine lees contained total phenols, total nonflavonoids and total flavonoids expressed in mg of gallic acid equivalents per 100 g of dry mass: 2316.6±37.9, 1332.5±51.1 and 984.1±28.2, respectively. The content of total anthocyanins expressed in mg of cyanidin-3-glucoside equivalents per 100 g of dry mass was 383.1±21.6. Antioxidant capacity of wine lees determined by the DPPH and FRAP methods and expressed in mM of Trolox equivalents per 100 g was 259.8±1.8 and 45.7±1.05, respectively. The experiment lasted 60 days using C57BL/6 mice divided in four groups: group 1 was fed normal diet and used as control, group 2 was fed normal diet with added wine lees, group 3 was fed high-cholesterol diet (HCD, i.e. normal diet with the addition of sunflower oil, and group 4 was fed HCD with wine lees. HCD increased serum total cholesterol (TC by 2.3-fold, triacylglycerol (TAG by 1.5-fold, low-density lipoprotein (LDL by 3.5-fold and liver malondialdehyde (MDA by 50 %, and reduced liver superoxide dismutase (SOD by 50 %, catalase (CAT by 30 % and glutathione (GSH by 17.5 % compared to control. Conversely, treatment with HCD and wine lees reduced TC and LDL up to 1.4 times more than with HCD only, with depletion of lipid peroxidation (MDA and restoration of SOD and CAT activities in liver, approximating values of the control. HDL levels were unaffected in any group. Serum transaminase activity showed no hepatotoxic properties in the treatment with lees alone. In the proposed model, wine lees as a rich polyphenol source could be a basis for functional food products without alcohol.

  3. Bacterial-Chromatin Structural Proteins Regulate the Bimodal Expression of the Locus of Enterocyte Effacement (LEE) Pathogenicity Island in EnteropathogenicEscherichia coli.

    Science.gov (United States)

    Leh, Hervé; Khodr, Ahmad; Bouger, Marie-Christine; Sclavi, Bianca; Rimsky, Sylvie; Bury-Moné, Stéphanie

    2017-08-08

    In enteropathogenic Escherichia coli (EPEC), the locus of enterocyte effacement (LEE) encodes a type 3 secretion system (T3SS) essential for pathogenesis. This pathogenicity island comprises five major operons ( LEE1 to LEE5 ), with the LEE5 operon encoding T3SS effectors involved in the intimate adherence of bacteria to enterocytes. The first operon, LEE1 , encodes Ler (LEE-encoded regulator), an H-NS (nucleoid structuring protein) paralog that alleviates the LEE H-NS silencing. We observed that the LEE5 and LEE1 promoters present a bimodal expression pattern, depending on environmental stimuli. One key regulator of bimodal LEE1 and LEE5 expression is ler expression, which fluctuates in response to different growth conditions. Under conditions in vitro considered to be equivalent to nonoptimal conditions for virulence, the opposing regulatory effects of H-NS and Ler can lead to the emergence of two bacterial subpopulations. H-NS and Ler share nucleation binding sites in the LEE5 promoter region, but H-NS binding results in local DNA structural modifications distinct from those generated through Ler binding, at least in vitro Thus, we show how two nucleoid-binding proteins can contribute to the epigenetic regulation of bacterial virulence and lead to opposing bacterial fates. This finding implicates for the first time bacterial-chromatin structural proteins in the bimodal regulation of gene expression. IMPORTANCE Gene expression stochasticity is an emerging phenomenon in microbiology. In certain contexts, gene expression stochasticity can shape bacterial epigenetic regulation. In enteropathogenic Escherichia coli (EPEC), the interplay between H-NS (a nucleoid structuring protein) and Ler (an H-NS paralog) is required for bimodal LEE5 and LEE1 expression, leading to the emergence of two bacterial subpopulations (with low and high states of expression). The two proteins share mutual nucleation binding sites in the LEE5 promoter region. In vitro , the binding of H

  4. The Revels of a Young Republic: Revolutionary Possibilities of the Fandango in Timothy Flint’s 1826 Francis Berrian

    Directory of Open Access Journals (Sweden)

    Paul D. Naish

    2015-01-01

    Full Text Available Francis Berrian, de Timothy Flint (1826, la primera novela de temática latinoamericana escrita en Estados Unidos presenta a un joven de Massachusetts que rescata a la hija de un Conde de una banda de Comanches, y llega a participar en la Guerra de la Independencia de México. Un fandango en la hacienda de la mujer forma la escena central, donde ancianos y jóvenes, padres e hijos, amos y sirvientes se entremezclan en un baile lleno de posibilidades que anticipa una futura unión provechosa entre México y los Estados Unidos. Sin embargo, al tedioso norteamericano esta exhibición de familiaridad entre clases le incomoda, y la mexicana aristocrática le reprocha su esnobismo. Quizás, sin querer, Francis Berrian nos sugiere que las ideas de igualdad y fraternidad son mejor recibidas en una pista del México aristocrático que en la Republica de los Estados Unidos.

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

    Science.gov (United States)

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

    International Nuclear Information System (INIS)

    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.

  7. RcsB determines the locus of enterocyte effacement (LEE) expression and adherence phenotype of Escherichia coli O157 : H7 spinach outbreak strain TW14359 and coordinates bicarbonate-dependent LEE activation with repression of motility.

    Science.gov (United States)

    Morgan, Jason K; Vendura, Khoury W; Stevens, Stanley M; Riordan, James T

    2013-11-01

    The 2006 US spinach outbreak of Escherichia coli O157 : H7, characterized by unusually severe disease, has been attributed to a strain (TW14359) with enhanced pathogenic potential, including elevated virulence gene expression, robust adherence and the presence of novel virulence factors. This study proposes a mechanism for the unique virulence expression and adherence phenotype of this strain, and further expands the role for regulator RcsB in control of the E. coli locus of enterocyte effacement (LEE) pathogenicity island. Proteomic analysis of TW14359 revealed a virulence proteome consistent with previous transcriptome studies that included elevated levels of the LEE regulatory protein Ler and type III secretion system (T3SS) proteins, secreted T3SS effectors and Shiga toxin 2. Basal levels of the LEE activator and Rcs phosphorelay response regulator, RcsB, were increased in strain TW14359 relative to O157 : H7 strain Sakai. Deletion of rcsB eliminated inherent differences between these strains in ler expression, and in T3SS-dependent adherence. A reciprocating regulatory pathway involving RcsB and LEE-encoded activator GrlA was identified and predicted to co-ordinate LEE activation with repression of the flhDC flagellar regulator and motility. Overexpression of grlA was shown to increase RcsB levels, but did not alter expression from promoters driving rcsB transcription. Expression of rcsDB and RcsB was determined to increase in response to physiological levels of bicarbonate, and bicarbonate-dependent stimulation of the LEE was shown to be dependent on an intact Rcs system and ler activator grvA. The results of this study significantly broaden the role for RcsB in enterohaemorrhagic E. coli virulence regulation.

  8. Evaluative Archeological Investigations at Four Sites Along the Right Bank of Lake Francis Case, Lyman County, South Dakota. Volume 1

    Science.gov (United States)

    1991-02-01

    Bouteloua spp., currant (Ribes aureum), buffalo berry (Shepherdia argentea), wild grape (Vitis vulpina), and wild rose (Rosa woodsii) are also present...construction, some of the more important plants used may have included: berries of Shepherdia, Prunus, Ribes, Amelanchier, Vitis; seeds of Rumex; roots, tubers...Large Dogs in North America. Tebiwa 11(2) :43-49. Lees, William B. 1985 Dakota Acculturation during the Early Reservation Period: Evidence from the

  9. Interpretation for ''high''-Tc of the totally interconnected solution of the Ma and Lee model

    International Nuclear Information System (INIS)

    Wiecko, C.

    1988-09-01

    The already presented totally interconnected (mean-field) approximation of the Ma and Lee model, pictures very well many ingredients of the present status of comprehension of high-T c superconductors. The picture is that of a disordered grain with variable number of particles available for an attractive on-site pairing interaction, embedded in a reservoir of normal particles which fix the chemical potential. Interesting effect of absence of T c and then a sharp increase and slow decay of T c with disorder appears for weak coupling pairing as compared with the hopping probability for single particles. Interpretation is given in terms of one-particle Anderson localization theory and standard mechanisms. (author). 13 refs, 4 figs

  10. Lee-Yang-inspired functional with a density-dependent neutron-neutron scattering length

    Science.gov (United States)

    Grasso, M.; Lacroix, D.; Yang, C. J.

    2017-05-01

    Inspired by the low-density Lee-Yang expansion for the energy of a dilute Fermi gas of density ρ and momentum kF, we introduce here a Skyrme-type functional that contains only s -wave terms and provides, at the mean-field level, (i) a satisfactory equation of state for neutron matter from extremely low densities up to densities close to the equilibrium point, and (ii) a good-quality equation of state for symmetric matter at density scales around the saturation point. This is achieved by using a density-dependent neutron-neutron scattering length a (ρ ) which satisfies the low-density limit (for Fermi momenta going to zero) and has a density dependence tuned in such a way that the low-density constraint |a (ρ ) kF|≤1 is satisfied at all density scales.

  11. Vernon Lee in the Vatican: the uneasy alliance of aestheticism and archaeology.

    Science.gov (United States)

    Evangelista, Stefano

    2009-01-01

    From the 1800s onward, aesthetic critics attempted to free the study of ancient Greek art from the frameworks of institutional education and professionalized criticism. In this process, aestheticism entered an uneasy alliance with archaeology, a discipline that was likewise challenging traditional modes of classical learning practiced in public schools and the old universities. In "The Child in the Vatican" (1881), Vernon Lee -- writing under the influence of Pater and from a position of cosmopolitan female amateurism -- examines the uses of archaeological science in the study of classical art. Her analysis of the sculptures of the Niobe Group at once relies on the archaeological method and asks readers to doubt scientific approaches to art that dim the sublime power of the art object.

  12. Enigmatic eight-meter trace fossils in the Lower Pennsylvanian Lee sandstone, central Appalachian basin, Tennessee

    Science.gov (United States)

    Wnuk, C.; Maberry, J.O.

    1990-01-01

    Enigmatic tubular trace fossils up to eight meters long occur in the Lower Pennsylvanian Middlesboro Member of the Lee Formation. Two morphotypes occur: type 1 trace fossils are plain, smooth, vertical, nonbranching, parallel-walled, tubular structures, type 2 trace fossils branch, have walls with faint vertical striations, regularly or irregularly spaced nodes, and funnel-shaped terminations. Sandstone casts filling type 2 structures have helical spiral morphology, and, in rare individuals, faint meniscate fills have been observed. Both trace-fossil morphotypes have poorly cemented wall linings containing framboidal pyrite, amorphous carbon, quartz sand, and poorly preserved fecal material. The trace fossils occur in a massive, structureless, channel-form sandstone, originating at the contact between a channel lag and the overlying massive fill representing a barrier island transgressing an estuarine facies. Origin of these structures is uncertain. -from Authors

  13. The Yang-Lee edge singularity for the Ising model on two Sierpinski fractal lattices

    Energy Technology Data Exchange (ETDEWEB)

    Knezevic, Milan [Faculty of Physics, University of Belgrade, PO Box 368, 11000 Belgrade (Serbia); Knezevic, Dragica, E-mail: knez@ff.bg.ac.r, E-mail: dknezevic@kg.ac.r [Faculty of Natural Sciences and Mathematics, University of Kragujevac, PO Box 60, 34000 Kragujevac (Serbia)

    2010-10-15

    We study the distribution of zeros of the partition function of the ferromagnetic Ising model near the Yang-Lee edge on two Sierpiski-type lattices. We have shown that relevant correlation length displays a logarithmic divergence near the edge, {xi}{sub YL{approx}}|ln({partial_derivative}h)|{sup {Phi}} where {Phi} is a constant and {delta}h distance from the edge, in the case of a modified Sierpinski gasket with a nonuniform coordination number. It is demonstrated that this critical behavior can be related to the critical behavior of a simple zero-field Gaussian model of the same structure. We have shown that there is no such connection between these two models on a second lattice that has a uniform coordination number. These findings suggest that fluctuations of the lattice coordination number of a nonhomogeneous self-similar structure exert the crucial influence on the critical behavior of both models.

  14. 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)

    Energy Technology Data Exchange (ETDEWEB)

    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

  15. Francis Bacon: teoria, método e contribuições para a educação

    Francis Bacon: teory, method and contributions to the education

    OpenAIRE

    Roberto Carlos Simões Galvão

    2007-01-01

    PortuguesNo presente artigo, propomos uma breve análise do pensamento de Francis Bacon (1561-1626) e suas contribuições para a educação. Com Bacon o antigo caráter religioso ou metafísico do conhecimento foi substituído pela objetividade da ciência experimental, algo até então desconhecido. A ciência passou a representar um meio em busca de um fim, qual seja, o domínio do homem sobre a natureza. O desejo de Bacon de promover uma reorganização do domínio do conhecimento humano, baseando-se não...

  16. Pump used as a turbine (PAT) with flow control - Part 2: Selection of the pump to be transformed into a turbine; Petites centrales hydrauliques. Pompe fonctionnant en turbine avec reglage du debit (Pat-Francis). 2eme partie: selection de la pompe inversee pour fonctionnement en turbine

    Energy Technology Data Exchange (ETDEWEB)

    Chapallaz, J.-M.

    2007-02-15

    This second part of a final report for the Swiss Federal Office of Energy (SFOE) discusses the use of a pump equipped with variable guide vanes, similar to a Francis turbine. This second part of a four-part article deals with the preliminary selection of a pump to be transformed into a turbine. The statistical methods used in this process, which was developed by the author, are described. The method used for the determination of the optimal operating point is presented and discussed, as are the basic differences between pumps and turbines. Mechanical aspects and efficiencies are discussed and characteristic curves are presented, as are examples of the implementation of the concept.

  17. German-American Cultural Interaction in the Jacksonian Era: Six Unpublished Letters by Francis Lieber and John Pickering to Wilhelm von Humboldt.

    Science.gov (United States)

    Mueller-Vollmer, Kurt

    1998-01-01

    Letters by German-American writer and political scientist Francis Lieber and American lawyer and linguist John Pickering to Wilhem von Humboldt in Berlin, published here for the first time, give insight into the cultural interaction between Germany and the United States during the Jacksonian era, and may open new perspectives for German-American…

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

    NARCIS (Netherlands)

    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

  19. 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

    Science.gov (United States)

    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...

  20. 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

    Science.gov (United States)

    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…

  1. 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"

    Science.gov (United States)

    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…

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

    NARCIS (Netherlands)

    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

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Science.gov (United States)

    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

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

    Energy Technology Data Exchange (ETDEWEB)

    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.

  6. Study of the vortex-induced pressure excitation source in a Francis turbine draft tube by particle image velocimetry

    Science.gov (United States)

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

    2015-12-01

    Francis turbines operating at part-load experience the development of a precessing cavitation vortex rope at the runner outlet, which acts as an excitation source for the hydraulic system. In case of resonance, the resulting pressure pulsations seriously compromise the stability of the machine and of the electrical grid to which it is connected. As such off-design conditions are increasingly required for the integration of unsteady renewable energy sources into the existing power system, an accurate assessment of the hydropower plant stability is crucial. However, the physical mechanisms driving this excitation source remain largely unclear. It is for instance essential to establish the link between the draft tube flow characteristics and the intensity of the excitation source. In this study, a two-component particle image velocimetry system is used to investigate the flow field at the runner outlet of a reduced-scale physical model of a Francis turbine. The discharge value is varied from 55 to 81 % of the value at the best efficiency point. A particular set-up is designed to guarantee a proper optical access across the complex geometry of the draft tube elbow. Based on phase-averaged velocity fields, the evolution of the vortex parameters with the discharge, such as the trajectory and the circulation, is determined for the first time. It is shown that the rise in the excitation source intensity is induced by an enlargement of the vortex trajectory and a simultaneous increase in the precession frequency, as well as the vortex circulation. Below a certain value of discharge, the structure of the vortex abruptly changes and loses its coherence, leading to a drastic reduction in the intensity of the induced excitation source.

  7. Children describe life after Hurricane Andrew.

    Science.gov (United States)

    Coffman, S

    1994-01-01

    Hurricane Andrew, which devastated the south Florida coast in August 1992, left over 250,000 people homeless with multiple health and social problems. This nursing study explored the experiences of 17 children, ages 5 through 12, who lived in the geographic area of storm damage. Common experiences described by the children included remembering the storm, dealing with after-effects, and reestablishing a new life. In general, children described a sense of strangeness, articulated as "life is weird" after the hurricane. In addition to stressful responses, many positive reactions were described by children in the study, revealing that the disaster also had a maturing effect.

  8. A Conversation with Lee Shulman--Signature Pedagogies for Teacher Education: Defining Our Practices and Rethinking Our Preparation

    Science.gov (United States)

    Falk, Beverly

    2006-01-01

    Lee S. Shulman is the President of The Carnegie Foundation for the Advancement of Teaching, a foundation whose mission is "to do and perform all things necessary to encourage, uphold and dignify the profession of teaching." Prior to assuming his role at Carnegie, Shulman was the Charles E. Ducommun Professor of Education at Stanford…

  9. 76 FR 79228 - Combined Licenses at William States Lee III Nuclear Station Site, Units 1 and 2; Duke Energy...

    Science.gov (United States)

    2011-12-21

    ... From the Federal Register Online via the Government Publishing Office NUCLEAR REGULATORY COMMISSION Combined Licenses at William States Lee III Nuclear Station Site, Units 1 and 2; Duke Energy Carolinas, LLC AGENCY: Nuclear Regulatory Commission. ACTION: Draft environmental impact statement; public...

  10. Q & A with Ed Tech Leaders: Interview with Curtis J. Bonk, Mimi Miyoung Lee, Thomas C. Reeves, & Thomas H. Reynolds

    Science.gov (United States)

    Viner, Mark; Gardner, Ellen; Shaughnessy, Michael F.

    2016-01-01

    Curtis J. Bonk, is Professor of Instructional Systems Technology at Indiana University and President of CourseShare. Mimi Miyoung Lee is Associate Professor in the Department of Curriculum and instruction at the University of Houston. Thomas C. Reeves is Professor Emeritus of Learning, Design, and Technology at the University of Georgia. Thomas H.…

  11. Disposition of recently described species of Penicillium

    NARCIS (Netherlands)

    Frisvad, Jens C.; Samson, Robert A.; Stolk, Amelia C.

    1990-01-01

    Hundred and twenty-two species, varieties, and new combinations of Penicillium, Eupenicillium, and Talaromyces described since 1977 have been studied taxonomically and screened for mycotoxin production. Only 48 taxa could be accepted: Eupenicillium angustiporcatum, E. cryptum, E. lineolatum, E.

  12. Describing content in middle school science curricula

    Science.gov (United States)

    Schwarz-Ballard, Jennifer A.

    As researchers and designers, we intuitively recognize differences between curricula and describe them in terms of design strategy: project-based, laboratory-based, modular, traditional, and textbook, among others. We assume that practitioners recognize the differences in how each requires that students use knowledge, however these intuitive differences have not been captured or systematically described by the existing languages for describing learning goals. In this dissertation I argue that we need new ways of capturing relationships among elements of content, and propose a theory that describes some of the important differences in how students reason in differently designed curricula and activities. Educational researchers and curriculum designers have taken a variety of approaches to laying out learning goals for science. Through an analysis of existing descriptions of learning goals I argue that to describe differences in the understanding students come away with, they need to (1) be specific about the form of knowledge, (2) incorporate both the processes through which knowledge is used and its form, and (3) capture content development across a curriculum. To show the value of inquiry curricula, learning goals need to incorporate distinctions among the variety of ways we ask students to use knowledge. Here I propose the Epistemic Structures Framework as one way to describe differences in students reasoning that are not captured by existing descriptions of learning goals. The usefulness of the Epistemic Structures framework is demonstrated in the four curriculum case study examples in Part II of this work. The curricula in the case studies represent a range of content coverage, curriculum structure, and design rationale. They serve both to illustrate the Epistemic Structures analysis process and make the case that it does in fact describe learning goals in a way that captures important differences in students reasoning in differently designed curricula

  13. General Robert E. Lee (1807-70) and Philanthropist George Peabody (1795-1869) at White Sulphur Springs, West Virginia, July 23-Aug. 30, 1869.

    Science.gov (United States)

    Parker, Franklin; Parker, Betty J.

    This paper discusses the chance meeting at White Sulphur Springs (West Virginia) of two important public figures, Robert E. Lee and George Peabody, whose rare encounter marked a symbolic turn from Civil War bitterness toward reconciliation and the lifting power of education. The paper presents an overview of Lee's life and professional and…

  14. Practical aspects of Lee Goldburg based CRAMPS techniques for high-resolution 1H NMR spectroscopy in solids: Implementation and applications

    Science.gov (United States)

    Coelho, Cristina; Rocha, João; Madhu, P. K.; Mafra, Luís

    2008-10-01

    Elucidating the local environment of the hydrogen atoms is an important problem in materials science. Because 1H spectra in solid-state nuclear magnetic resonance (NMR) suffer from low resolution due to homogeneous broadening, even under magic-angle spinning (MAS), information of chemical interest may only be obtained using certain high-resolution 1H MAS techniques. 1H Lee-Goldburg (LG) CRAMPS (Combined Rotation And Multiple-Pulse Spectroscopy) methods are particularly well suited for studying inorganic-organic hybrid materials, rich in 1H nuclei. However, setting up CRAMPS experiments is time-consuming and not entirely trivial, facts that have discouraged their widespread use by materials scientists. To change this status quo, here we describe and discuss some important aspects of the experimental implementation of CRAMPS techniques based on LG decoupling schemes, such as FSLG (Frequency Switched), and windowed and windowless PMLG (Phase Modulated). In particular, we discuss the influence on the quality of the 1H NMR spectra of the different parameters at play, for example LG (Lee-Goldburg) pulses, radio-frequency ( rf) phase, frequency switching, and pulse imperfections, using glycine and adamantane as model compounds. The efficiency and robustness of the different LG-decoupling schemes is then illustrated on the following materials: organo-phosphorus ligand, N-(phosphonomethyl)iminodiacetic acid [H 4pmida] [I], and inorganic-organic hybrid materials (C 4H 12N 2)[Ge 2(pmida) 2OH 2]·4H 2O [II] and (C 2H 5NH 3)[Ti(H 1.5PO 4)(PO 4)] 2·H 2O [III].

  15. Statistical Methods for Describing Developmental Patterns.

    Science.gov (United States)

    Burchinal, Margaret R.

    1999-01-01

    Describes a variety of analytic tools available to address questions about development, including growth-curve methods, hierarchical regressions, and both primary and secondary data analysis of project and extant data. Demonstrates some of these techniques using extant data from two projects to examine questions about treatment efficacy and…

  16. Did goethe describe attention deficit hyperactivity disorder?

    Science.gov (United States)

    Bonazza, Sara; Scaglione, Cesa; Poppi, Massimo; Rizzo, Giovanni

    2011-01-01

    As early as 1846, the typical symptoms of attention deficit hyperactivity disorder (ADHD) were described by Heinrich Hoffmann (1809-1894). However, in Goethe's masterpiece Faust (1832), the character of Euphorion strongly suggests ADHD diagnosis. Copyright © 2011 S. Karger AG, Basel.

  17. Frameworks for understanding and describing business models

    DEFF Research Database (Denmark)

    Nielsen, Christian; Roslender, Robin

    2014-01-01

    This chapter provides in a chronological fashion an introduction to six frameworks that one can apply to describing, understanding and also potentially innovating business models. These six frameworks have been chosen carefully as they represent six very different perspectives on business models ...... Maps (2001) • Intellectual Capital Statements (2003) • Chesbrough’s framework for Open Business Models (2006) • Business Model Canvas (2008)...

  18. Modeling Approaches for Describing Microbial Population Heterogeneity

    DEFF Research Database (Denmark)

    Lencastre Fernandes, Rita

    in a computational (CFD) fluid dynamic model. The anaerobic Growth of a budding yeast population in a continuously run microbioreactor was used as example. The proposed integrated model describes the fluid flow, the local cell size and cell cycle position distributions, as well as the local concentrations of glucose...

  19. Phenomenological approach to describe logistic growth and ...

    Indian Academy of Sciences (India)

    2016-10-18

    Oct 18, 2016 ... to describe temporal evolution of systems occurring in physics, biology, statistics and economics. .... may be considered to define a new class whose growth is affected by environmental constraints like ... The growth processes may be endogenous or exoge- nous by nature. These natures do not depend on ...

  20. Analytical Solutions To Describe Juxtaposed Sands | Adeniji ...

    African Journals Online (AJOL)

    Mathematical (linear diffusion) equations are presented for two pseudoreservoir regions intersected by fault that describe the effects of partial communicating fault on pressure transient behaviour for each fault block. Green's and source function technique solve these equations. A two-well system is considered for the ...

  1. Parameters Describing Earth Observing Remote Sensing Systems

    Science.gov (United States)

    Zanoni, Vicki; Ryan, Robert E.; Pagnutti, Mary; Davis, Bruce; Markham, Brian; Storey, Jim

    2003-01-01

    The Earth science community needs to generate consistent and standard definitions for spatial, spectral, radiometric, and geometric properties describing passive electro-optical Earth observing sensors and their products. The parameters used to describe sensors and to describe their products are often confused. In some cases, parameters for a sensor and for its products are identical; in other cases, these parameters vary widely. Sensor parameters are bound by the fundamental performance of a system, while product parameters describe what is available to the end user. Products are often resampled, edge sharpened, pan-sharpened, or compressed, and can differ drastically from the intrinsic data acquired by the sensor. Because detailed sensor performance information may not be readily available to an international science community, standardization of product parameters is of primary performance. Spatial product parameters described include Modulation Transfer Function (MTF), point spread function, line spread function, edge response, stray light, edge sharpening, aliasing, ringing, and compression effects. Spectral product parameters discussed include full width half maximum, ripple, slope edge, and out-of-band rejection. Radiometric product properties discussed include relative and absolute radiometry, noise equivalent spectral radiance, noise equivalent temperature diffenence, and signal-to-noise ratio. Geometric product properties discussed include geopositional accuracy expressed as CE90, LE90, and root mean square error. Correlated properties discussed include such parameters as band-to-band registration, which is both a spectral and a spatial property. In addition, the proliferation of staring and pushbroom sensor architectures requires new parameters to describe artifacts that are different from traditional cross-track system artifacts. A better understanding of how various system parameters affect product performance is also needed to better ascertain the

  2. Generating and Describing Affective Eye Behaviors

    Science.gov (United States)

    Mao, Xia; Li, Zheng

    The manner of a person's eye movement conveys much about nonverbal information and emotional intent beyond speech. This paper describes work on expressing emotion through eye behaviors in virtual agents based on the parameters selected from the AU-Coded facial expression database and real-time eye movement data (pupil size, blink rate and saccade). A rule-based approach to generate primary (joyful, sad, angry, afraid, disgusted and surprise) and intermediate emotions (emotions that can be represented as the mixture of two primary emotions) utilized the MPEG4 FAPs (facial animation parameters) is introduced. Meanwhile, based on our research, a scripting tool, named EEMML (Emotional Eye Movement Markup Language) that enables authors to describe and generate emotional eye movement of virtual agents, is proposed.

  3. Describing Spirituality at the End of Life.

    Science.gov (United States)

    Stephenson, Pam Shockey; Berry, Devon M

    2015-09-01

    Spirituality is salient to persons nearing the end of life (EOL). Unfortunately, researchers have not been able to agree on a universal definition of spirituality reducing the effectiveness of spiritual research. To advance spiritual knowledge and build an evidence base, researchers must develop creative ways to describe spirituality as it cannot be explicitly defined. A literature review was conducted to determine the common attributes that comprise the essence of spirituality, thereby creating a common ground on which to base spiritual research. Forty original research articles (2002 to 2012) focusing on EOL and including spiritual definitions/descriptions were reviewed. Analysis identified five attributes that most commonly described the essence of spirituality, including meaning, beliefs, connecting, self-transcendence, and value. © The Author(s) 2014.

  4. Effect of Saccharomyces strains on the quality of red wines aged on lees.

    Science.gov (United States)

    Loira, I; Vejarano, R; Morata, A; Ricardo-da-Silva, J M; Laureano, O; González, M C; Suárez-Lepe, J A

    2013-08-15

    Ageing on lees involves ageing the wine in contact with yeast cells after fermentation. If combined with the addition of oak chips, it can soften the wood flavour and increase the aromatic complexity of wine. The aim of the present work is to optimise both ageing techniques through selection of an adequate Saccharomyces cerevisiae strain. The study lasted 6 months and content of polysaccharides, anthocyanins, proanthocyanidins, volatile compounds, colour parameters and sensory analysis, were periodically evaluated. Among the strains tested, G37 showed the highest release of polysaccharides (24.4±5.5 mg l(-1)). Vanillin, syringaldehyde and furfuryl alcohol increased with ageing time in 7VA2 treatment. The wine aged with CTPL14 strain presented fewer monomeric and oligomeric proanthocyanidins (12.4±0.6 and 83.4±8.3 mg l(-1), respectively), and showed the lowest astringency and bitterness sensations. Results show an improvement in the sensory profile of the red wine aged with a combination of these two techniques. Copyright © 2013 Elsevier Ltd. All rights reserved.

  5. Lee-Carter state space modeling: Application to the Malaysia mortality data

    Science.gov (United States)

    Zakiyatussariroh, W. H. Wan; Said, Z. Mohammad; Norazan, M. R.

    2014-06-01

    This article presents an approach that formalizes the Lee-Carter (LC) model as a state space model. Maximum likelihood through Expectation-Maximum (EM) algorithm was used to estimate the model. The methodology is applied to Malaysia's total population mortality data. Malaysia's mortality data was modeled based on age specific death rates (ASDR) data from 1971-2009. The fitted ASDR are compared to the actual observed values. However, results from the comparison of the fitted and actual values between LC-SS model and the original LC model shows that the fitted values from the LC-SS model and original LC model are quite close. In addition, there is not much difference between the value of root mean squared error (RMSE) and Akaike information criteria (AIC) from both models. The LC-SS model estimated for this study can be extended for forecasting ASDR in Malaysia. Then, accuracy of the LC-SS compared to the original LC can be further examined by verifying the forecasting power using out-of-sample comparison.

  6. Structural modeling of age specific fertility curves in Peninsular Malaysia: An approach of Lee Carter method

    Science.gov (United States)

    Hanafiah, Hazlenah; Jemain, Abdul Aziz

    2013-11-01

    In recent years, the study of fertility has been getting a lot of attention among research abroad following fear of deterioration of fertility led by the rapid economy development. Hence, this study examines the feasibility of developing fertility forecasts based on age structure. Lee Carter model (1992) is applied in this study as it is an established and widely used model in analysing demographic aspects. A singular value decomposition approach is incorporated with an ARIMA model to estimate age specific fertility rates in Peninsular Malaysia over the period 1958-2007. Residual plots is used to measure the goodness of fit of the model. Fertility index forecast using random walk drift is then utilised to predict the future age specific fertility. Results indicate that the proposed model provides a relatively good and reasonable data fitting. In addition, there is an apparent and continuous decline in age specific fertility curves in the next 10 years, particularly among mothers' in their early 20's and 40's. The study on the fertility is vital in order to maintain a balance between the population growth and the provision of facilities related resources.

  7. Nobelist TD LEE Scientist Cooperation Network and Scientist Innovation Ability Model

    Directory of Open Access Journals (Sweden)

    Jin-Qing Fang

    2013-01-01

    Full Text Available Nobelist TD Lee scientist cooperation network (TDLSCN and their innovation ability are studied. It is found that the TDLSCN not only has the common topological properties both of scale-free and small-world for a general scientist cooperation networks, but also appears the creation multiple-peak phenomenon for number of published paper with year evolution, which become Nobelist TD Lee’s significant mark distinguished from other scientists. This new phenomenon has not been revealed in the scientist cooperation networks before. To demonstrate and explain this new finding, we propose a theoretical model for a nature scientist and his/her team innovation ability. The theoretical results are consistent with the empirical studies very well. This research demonstrates that the model has a certain universality and can be extended to estimate innovation ability for any nature scientist and his/her team. It is a better method for evaluating scientist innovation ability and his/her team for the academic profession and is of application potential.

  8. The spirit of St Louis: the contributions of Lee N. Robins to North American psychiatric epidemiology.

    Science.gov (United States)

    Campbell, Nancy D

    2014-08-01

    This article takes up the history of North American psychiatric epidemiology with reference to production of knowledge concerning sociopathic or antisocial personality disorder and drug dependence, abuse, and/or addiction. These overlapping arenas provide a microcosm within which to explore the larger shift of postwar psychiatric epidemiology from community studies based on psychological scales to studies based on specific diagnostic criteria. This paper places the figure of sociologist Lee Nelken Robins within the context of the Department of Psychiatry in the School of Medicine at Washington University in St Louis, Missouri. The St Louis research group--to which Robins was both marginal and central--developed the basis for specific diagnostic criteria and was joined by Robert Spitzer, Jean Endicott and other architects of DSM-III in reorienting American psychiatry towards medical, biological and epidemiological models. Robins was a key linchpin working at the nexus of the psychiatric epidemiological and sociological drug addiction research networks. This article situates her work within the broader set of societal and governmental transformations leading to the technologically sophisticated turn in American psychiatric epidemiology and research on the aetiology of drug abuse and mental health and illness. Published by Oxford University Press on behalf of the International Epidemiological Association © The Author 2013; all rights reserved.

  9. The other Higgses, at resonance, in the Lee-Wick extension of the Standard Model

    CERN Document Server

    Figy, Terrance

    2011-01-01

    Within the framework of the Lee Wick Standard Model (LWSM) we investigate Higgs pair production $gg \\to h_0 h_0$, $gg \\to h_0 \\tilde p_0$ and top pair production $gg \\to \\bar tt$ at the Large Hadron Collider (LHC), where the neutral particles from the Higgs sector ($h_0$, $\\tilde h_0$ and $\\tilde p_0$) appear as possible resonant intermediate states. We investigate the signal $gg \\to h_0 h_0 \\to \\bar b b \\gamma \\gamma$ and we find that the LW Higgs, depending on its mass-range, can be seen not long after the LHC upgrade in 2012. More precisely this happens when the new LW Higgs states are below the top pair threshold. In $gg \\to \\bar tt$ the LW states, due to the wrong-sign propagator and negative width, lead to a dip-peak structure instead of the usual peak-dip structure which gives a characteristic signal especially for low-lying LW Higgs states. We comment on the LWSM and the forward-backward asymmetry in view of the measurement at the TeVatron. Furthermore, we present a technique which reduces the hyperbo...

  10. LiveDescribe: Can Amateur Describers Create High-Quality Audio Description?

    Science.gov (United States)

    Branje, Carmen J.; Fels, Deborah I.

    2012-01-01

    Introduction: The study presented here evaluated the usability of the audio description software LiveDescribe and explored the acceptance rates of audio description created by amateur describers who used LiveDescribe to facilitate the creation of their descriptions. Methods: Twelve amateur describers with little or no previous experience with…

  11. How do consumers describe wine astringency?

    Science.gov (United States)

    Vidal, Leticia; Giménez, Ana; Medina, Karina; Boido, Eduardo; Ares, Gastón

    2015-12-01

    Astringency is one of the most important sensory characteristics of red wine. Although a hierarchically structured vocabulary to describe the mouthfeel sensations of red wine has been proposed, research on consumers' astringency vocabulary is lacking. In this context, the aim of this work was to gain an insight on the vocabulary used by wine consumers to describe the astringency of red wine and to evaluate the influence of wine involvement on consumers' vocabulary. One hundred and twenty-five wine consumers completed and on-line survey with five tasks: an open-ended question about the definition of wine astringency, free listing the sensations perceived when drinking an astringent wine, free listing the words they would use to describe the astringency of a red wine, a CATA question with 44 terms used in the literature to describe astringency, and a wine involvement questionnaire. When thinking about wine astringency consumers freely elicited terms included in the Mouth-feel Wheel, such as dryness and harsh. The majority of the specific sub-qualities of the Mouth-feel Wheel were not included in consumer responses. Also, terms not classified as astringency descriptors were elicited (e.g. acid and bitter). Only 17 out of the 31 terms from the Mouth-feel Wheel were used by more than 10% of participants when answering the CATA question. There were no large differences in the responses of consumer segments with different wine involvement. Results from the present work suggest that most of the terms of the Mouth-feel Wheel might not be adequate to communicate the astringency characteristics of red wine to consumers. Copyright © 2015 Elsevier Ltd. All rights reserved.

  12. Adiabatically describing rare earths using microscopic deformations

    Science.gov (United States)

    Nobre, Gustavo; Dupuis, Marc; Herman, Michal; Brown, David

    2017-09-01

    Recent works showed that reactions on well-deformed nuclei in the rare-earth region are very well described by an adiabatic method. This assumes a spherical optical potential (OP) accounting for non-rotational degrees of freedom while the deformed configuration is described by couplings to states of the g.s. rotational band. This method has, apart from the global OP, only the deformation parameters as inputs, with no additional fit- ted variables. For this reason, it has only been applied to nuclei with well-measured deformations. With the new computational capabilities, microscopic large-scale calculations of deformation parameters within the HFB method based on the D1S Gogny force are available in the literature. We propose to use such microscopic deformations in our adi- abatic method, allowing us to reproduce the cross sections agreements observed in stable nuclei, and to reliably extend this description to nuclei far from stability, describing the whole rare-earth region. Since all cross sections, such as capture and charge exchange, strongly depend on the correct calculation of absorption from the incident channel (from direct reaction mechanisms), this approach significantly improves the accuracy of cross sections and transitions relevant to astrophysical studies. The work at BNL was sponsored by the Office of Nuclear Physics, Office of Science of the US Department of Energy, under Contract No. DE-AC02-98CH10886 with Brookhaven Science Associates, LLC.

  13. Using fundamental equations to describe basic phenomena

    DEFF Research Database (Denmark)

    Jakobsen, Arne; Rasmussen, Bjarne D.

    1999-01-01

    When the fundamental thermodynamic balance equations (mass, energy, and momentum) are used to describe the processes in a simple refrigeration system, then one finds that the resulting equation system will have a degree of freedom equal to one. Further investigations reveal that it is the equation...... and subcooling are introduced. Since the degree of freedom was equal to one, using both the superheat and subcooling require that one of the fundamental equations must be omitted from the equation system.The main purpose of the paper is to clarify the relation between the fundamental balance equations...

  14. 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.

    Data.gov (United States)

    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...

  15. On Redundancy in Describing Linguistic Systems

    Directory of Open Access Journals (Sweden)

    Vladimir Borissov Pericliev

    2015-12-01

    Full Text Available On Redundancy in Describing Linguistic Systems The notion of system of linguistic elements figures prominently in most post-Saussurian linguistics up to the present. A “system” is the network of the contrastive (or, distinctive features each element in the system bears to the remaining elements. The meaning (valeur of each element in the system is the set of features that are necessary and jointly sufficient to distinguish this element from all others. The paper addresses the problems of “redundancy”, i.e. the occurrence of features that are not strictly necessary in describing an element in a system. Redundancy is shown to smuggle into the description of linguistic systems, this infelicitous practice illustrated with some examples from the literature (e.g. the classical phonemic analysis of Russian by Cherry, Halle, and Jakobson, 1953. The logic and psychology of the occurrence of redundancy are briefly sketched and it is shown that, in addition to some other problems, redundancy leads to a huge and unresolvable ambiguity of descriptions of linguistic systems (the Buridan’s ass problem.

  16. Describing the learning curve for bulbar urethroplasty.

    Science.gov (United States)

    Spilotros, Marco; Malde, Sachin; Greenwell, Tamsin J

    2017-12-01

    Learning curves have been described for a number of urological procedures including radical prostatectomy and laparoscopic nephrectomy but rarely for urethroplasty. We describe the learning curve for bulbar urethroplasty in a single surgeon series. A retrospective case note review was performed of 91 consecutive men median age 32 years (range, 15-66 years) having bulbar urethroplasty performed by a single surgeon. Data was collected on type of urethroplasty, restricture rate (as defined by urethrogram and/or flow rate) and duration of follow up. The restricture rates were compared by quartiles and statistical analysis was by ¦Ö 2 between the first and fourth quartiles. The 91 men had 42 dorsal onlay buccal mucosal graft (Dorsal BMG), 20 BMG augmented bulbobulbar anastomotic (Augmented Rooftop) and 29 bulbobulbar anastomotic (BBA) urethroplasties performed. Median follow up was 39 months for the first quartile, 42 months for the second, 36 months for the third, and 35 months for the fourth. The restricture rate was 17% in the first quartile, 8.7% in the second and third quartiles and 4.5% in the fourth quartile. There were no restrictures noted after 24 months. There were 4 restrictures in the first quartile and 1 restricture in the fourth quartile (¦Ö 2 Plearning curve for bulbar urethroplasty with a reduced restricture rate each quartile and it may take as many as 90 cases to reach optimum restricture rates.

  17. Is an eclipse described in the Odyssey?

    Science.gov (United States)

    Baikouzis, Constantino; Magnasco, Marcelo O

    2008-07-01

    Plutarch and Heraclitus believed a certain passage in the 20th book of the Odyssey ("Theoclymenus's prophecy") to be a poetic description of a total solar eclipse. In the late 1920s, Schoch and Neugebauer computed that the solar eclipse of 16 April 1178 B.C.E. was total over the Ionian Islands and was the only suitable eclipse in more than a century to agree with classical estimates of the decade-earlier sack of Troy around 1192-1184 B.C.E. However, much skepticism remains about whether the verses refer to this, or any, eclipse. To contribute to the issue independently of the disputed eclipse reference, we analyze other astronomical references in the Epic, without assuming the existence of an eclipse, and search for dates matching the astronomical phenomena we believe they describe. We use three overt astronomical references in the epic: to Boötes and the Pleiades, Venus, and the New Moon; we supplement them with a conjectural identification of Hermes's trip to Ogygia as relating to the motion of planet Mercury. Performing an exhaustive search of all possible dates in the span 1250-1115 B.C., we looked to match these phenomena in the order and manner that the text describes. In that period, a single date closely matches our references: 16 April 1178 B.C.E. We speculate that these references, plus the disputed eclipse reference, may refer to that specific eclipse.

  18. Stimulated recall interviews for describing pragmatic epistemology

    Science.gov (United States)

    Shubert, Christopher W.; Meredith, Dawn C.

    2015-12-01

    Students' epistemologies affect how and what they learn: do they believe physics is a list of equations, or a coherent and sensible description of the physical world? In order to study these epistemologies as part of curricular assessment, we adopt the resources framework, which posits that students have many productive epistemological resources that can be brought to bear as they learn physics. In previous studies, these epistemologies have been either inferred from behavior in learning contexts or probed through surveys or interviews outside of the learning context. We argue that stimulated recall interviews provide a contextually and interpretively valid method to access students' epistemologies that complement existing methods. We develop a stimulated recall interview methodology to assess a curricular intervention and find evidence that epistemological resources aptly describe student epistemologies.

  19. Does Guru Granth Sahib describe depression?

    Science.gov (United States)

    Kalra, Gurvinder; Bhui, Kamaldeep; Bhugra, Dinesh

    2013-01-01

    Sikhism is a relatively young religion, with Guru Granth Sahib as its key religious text. This text describes emotions in everyday life, such as happiness, sadness, anger, hatred, and also more serious mental health issues such as depression and psychosis. There are references to the causation of these emotional disturbances and also ways to get out of them. We studied both the Gurumukhi version and the English translation of the Guru Granth Sahib to understand what it had to say about depression, its henomenology, and religious prescriptions for recovery. We discuss these descriptions in this paper and understand its meaning within the context of clinical depression. Such knowledge is important as explicit descriptions about depression and sadness can help encourage culturally appropriate assessment and treatment, as well as promote public health through education.

  20. Describing chaotic attractors: Regular and perpetual points

    Science.gov (United States)

    Dudkowski, Dawid; Prasad, Awadhesh; Kapitaniak, Tomasz

    2018-03-01

    We study the concepts of regular and perpetual points for describing the behavior of chaotic attractors in dynamical systems. The idea of these points, which have been recently introduced to theoretical investigations, is thoroughly discussed and extended into new types of models. We analyze the correlation between regular and perpetual points, as well as their relation with phase space, showing the potential usefulness of both types of points in the qualitative description of co-existing states. The ability of perpetual points in finding attractors is indicated, along with its potential cause. The location of chaotic trajectories and sets of considered points is investigated and the study on the stability of systems is shown. The statistical analysis of the observing desired states is performed. We focus on various types of dynamical systems, i.e., chaotic flows with self-excited and hidden attractors, forced mechanical models, and semiconductor superlattices, exhibiting the universality of appearance of the observed patterns and relations.

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

    DEFF Research Database (Denmark)

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

    2010-01-01

    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 do...... several orders of magnitude less than the current approaches of simulating the complex turbine flow....

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

    Directory of Open Access Journals (Sweden)

    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.

  3. Details of the general numerical solutions of the Friedberg-Lee soliton model for ground and exited states

    International Nuclear Information System (INIS)

    Koeppel, T.; Harvey, M.

    1984-06-01

    A new numerical method is applied to solving the equations of motion of the Friedberg-Lee Soliton model for both ground and spherically symmetric excited states. General results have been obtained over a wide range of parameters. Critical coupling constants and critical particle numbers have been determined below which soliton solutions cease to exist. The static properties of the proton are considered to show that as presently formulated the model fails to fit all experimental data for any set of parameters

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

    International Nuclear Information System (INIS)

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

  7. Plans should abstractly describe intended behavior

    Energy Technology Data Exchange (ETDEWEB)

    Pfleger, K.; Hayes-Roth, B. [Stanford Univ., CA (United States)

    1996-12-31

    Planning is the process of formulating a potential course of action. How courses of action (plans) produced by a planning module are represented and how they are used by execution-oriented modules of a complex agent to influence or dictate behavior are critical architectural issues. In contrast to the traditional model of plans as executable programs that dictate precise behaviors, we claim that autonomous agents inhabiting dynamic, unpredictable environments can make better use of plans that only abstractly describe their intended behavior. Such plans only influence or constrain behavior, rather than dictating it. This idea has been discussed in a variety of contexts, but it is seldom incorporated into working complex agents. Experiments involving instantiations of our Adaptive Intelligent Systems architecture in a variety of domains have demonstrated the generality and usefulness of the approach, even with our currently simple plan representation and mechanisms for plan following. The behavioral benefits include (1) robust improvisation of goal-directed behavior in response to dynamic situations, (2) ready exploitation of dynamically acquired knowledge or behavioral capabilities, and (3) adaptation based on dynamic aspects of coordinating diverse behaviors to achieve multiple goals. In addition to these run-time advantages, the approach has useful implications for the design and configuration of agents. Indeed, the core ideas of the approach are natural extensions of fundamental ideas in software engineering.

  8. Biofilm carrier migration model describes reactor performance.

    Science.gov (United States)

    Boltz, Joshua P; Johnson, Bruce R; Takács, Imre; Daigger, Glen T; Morgenroth, Eberhard; Brockmann, Doris; Kovács, Róbert; Calhoun, Jason M; Choubert, Jean-Marc; Derlon, Nicolas

    2017-06-01

    The accuracy of a biofilm reactor model depends on the extent to which physical system conditions (particularly bulk-liquid hydrodynamics and their influence on biofilm dynamics) deviate from the ideal conditions upon which the model is based. It follows that an improved capacity to model a biofilm reactor does not necessarily rely on an improved biofilm model, but does rely on an improved mathematical description of the biofilm reactor and its components. Existing biofilm reactor models typically include a one-dimensional biofilm model, a process (biokinetic and stoichiometric) model, and a continuous flow stirred tank reactor (CFSTR) mass balance that [when organizing CFSTRs in series] creates a pseudo two-dimensional (2-D) model of bulk-liquid hydrodynamics approaching plug flow. In such a biofilm reactor model, the user-defined biofilm area is specified for each CFSTR; thereby, X carrier does not exit the boundaries of the CFSTR to which they are assigned or exchange boundaries with other CFSTRs in the series. The error introduced by this pseudo 2-D biofilm reactor modeling approach may adversely affect model results and limit model-user capacity to accurately calibrate a model. This paper presents a new sub-model that describes the migration of X carrier and associated biofilms, and evaluates the impact that X carrier migration and axial dispersion has on simulated system performance. Relevance of the new biofilm reactor model to engineering situations is discussed by applying it to known biofilm reactor types and operational conditions.

  9. Historia and materia: the philosophical implications of Francis Bacon's natural history.

    Science.gov (United States)

    Giglioni, Guido

    2012-01-01

    This article examines the philosophical implications underlying Bacon's views on historical knowledge, paying special attention to that variety of historical knowledge described by Bacon as "natural." More specifically, this article explores the interplay of history (historia) and fable (fabula). In the sphere of thought, fabula is the equivalent to materia in nature. Both are described by Bacon as being "versatile" and "pliant." In Bacon's system of knowledge, philosophy, as the domain of reason, starts from historiae and fabulae, once memory and the imagination have fulfilled their cognitive tasks. This means that, for Bacon, there is no such thing as a pure use of reason. He advocates a kind of reason that, precisely because it is involved with matter's inner motions (its "appetites," in Bacon's characteristic language), is constitutively 'impure'. The article shows how the terms historia and fabula cover key semantic areas in defining Bacon's philosophy: historia may mean "history" as well as "story,"fabula "myth" as well "story". In both cases, we can see significant oscillations from a stronger meaning (close to those of matter and nature) to a weaker one (connected to wit and imagination), as if the power of nature decreases moving from histories and myths to stories. On the other hand, there are cases in which Bacon seems to stick to a diachronic view of the meaning of fables and histories, such that the transition from myths to history, especially natural history, is described as a collective effort towards reality and enlightenment.

  10. Describing pediatric dysphonia with nonlinear dynamic parameters

    Science.gov (United States)

    Meredith, Morgan L.; Theis, Shannon M.; McMurray, J. Scott; Zhang, Yu; Jiang, Jack J.

    2008-01-01

    Objective Nonlinear dynamic analysis has emerged as a reliable and objective tool for assessing voice disorders. However, it has only been tested on adult populations. In the present study, nonlinear dynamic analysis was applied to normal and dysphonic pediatric populations with the goal of collecting normative data. Jitter analysis was also applied in order to compare nonlinear dynamic and perturbation measures. This study’s findings will be useful in creating standards for the use of nonlinear dynamic analysis as a tool to describe dysphonia in the pediatric population. Methods The study included 38 pediatric subjects (23 children with dysphonia and 15 without). Recordings of sustained vowels were obtained from each subject and underwent nonlinear dynamic analysis and percent jitter analysis. The resulting correlation dimension (D2) and percent jitter values were compared across the two groups using t-tests set at a significance level of p = 0.05. Results It was shown that D2 values covary with the presence of pathology in children. D2 values were significantly higher in dysphonic children than in normal children (p = 0.002). Standard deviations indicated a higher level of variation in normal children’s D2 values than in dysphonic children’s D2 values. Jitter analysis showed markedly higher percent jitter in dysphonic children than in normal children (p = 0.025) and large standard deviations for both groups. Conclusion This study indicates that nonlinear dynamic analysis could be a viable tool for the detection and assessment of dysphonia in children. Further investigations and more normative data are needed to create standards for using nonlinear dynamic parameters for the clinical evaluation of pediatric dysphonia. PMID:18947887

  11. Francis Robert Lloyd and the celebrated traveller: a British Raj murder mystery.

    Science.gov (United States)

    Kumar, Sanjeev; Saxena, Susmita

    2013-07-01

    In 1854 the Schlagintweit brothers, scientist-explorers from Vienna were invited by the East India company to make a geological survey of the northern parts of the sub-continent. Adolphe Schlagintweit had wanted to cross into Central Asia from India. He had proceeded as far as Kashgar when he was allegedly murdered by a chief of one of the wandering tribes. His decapitated head became a source of intrigue. The paper describes the incident and the subsequent role of Dr F R Lloyd, a dentist from India, in the police investigation that followed. This is the first documented case from India of a legal case making use of forensic odontology.

  12. "Embodiment as procedures: Physical cleansing changes goal priming effects": Correction to Dong and Lee (2017).

    Science.gov (United States)

    2017-06-01

    Reports an error in "Embodiment as procedures: Physical cleansing changes goal priming effects" by Ping Dong and Spike W. S. Lee ( Journal of Experimental Psychology: General , 2017[Apr], Vol 146[4], 592-605). In the article, the following F-value and p-values in the Results section of Experiment 3 were set incorrectly: The p -value p =.925 should be p =.922. The F - and p -values F (1, 201)=.011, p =.916 should be F (1, 201) .014, p = .906. (The following abstract of the original article appeared in record 2017-14922-010.) Physical cleansing reduces the influence of numerous psychological experiences, such as guilt from immoral behavior, dissonance from free choice, and good/bad luck from winning/losing. How do these domain-general effects occur? We propose an integrative account of cleansing as an embodied procedure of psychological separation. By separating physical traces from a physical target object (e.g., detaching dirt from hands), cleansing serves as the embodied grounding for the separation of psychological traces from a psychological target object (e.g., dissociating prior experience from the present self). This account predicts that cleansing reduces the accessibility of psychological traces and their consequences for judgments and behaviors. Testing these in the context of goal priming, we find that wiping one's hands (vs. not) decreases the mental accessibility (Experiment 1), behavioral expression (Experiment 2), and judged importance (Experiments 3-4) of previously primed goals (e.g., achievement, saving, fitness). But if a goal is primed after cleansing, its importance gets amplified instead (Experiment 3). Based on the logic of moderation-of-process, an alternative manipulation that psychologically separates a primed goal from the present self produces the same effects, but critically, the effects vanish once people wipe their hands clean (Experiment 4), consistent with the notion that cleansing functions as an embodied procedure of psychological

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

    Science.gov (United States)

    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.

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

    Science.gov (United States)

    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.

  15. Rating catatonia in patients with chronic schizophrenia: Rasch analysis of the Bush-Francis Catatonia Rating Scale.

    Science.gov (United States)

    Wong, Eric; Ungvari, Gabor S; Leung, Siu-Kau; Tang, Wai-Kwong

    2007-01-01

    Catatonic signs and symptoms are frequently observed in patients with chronic schizophrenia. Clinical surveys have suggested that the composition of catatonic syndrome occurring in chronic schizophrenia may be different from what is found in acute psychiatric disorders or medical conditions. Consequently, this patient population may need tailor-made rating instruments for catatonia. The aim of the present study was to examine the suitability and accuracy of using the Bush-Francis Catatonia Rating Scale (BFCRS) in chronic schizophrenia inpatients. The unidimensionality (optimal number of items; item fit), and the scoring scheme (the optimal number of scoring categories) of the BFCRS were determined in a random sample of 225 patients with chronic schizophrenia applying Rasch analysis. In addition, differential item functioning (DIF) analysis was also performed. The BFCRS proved to be unidimensional apart from three misfit and one marginally misfit items. The three misfit items were removed from the scale thereby constructing a revised version called BFCRS-R. Since the original BFCRS (BFCRS-O) showed no increase across items across steep gradients (poor endorsability of step calibrations), in BFCRS-R a binary scale ('absent' versus 'present' choices only) was constructed instead of the scoring scheme of 0-3. The 20-item BFCRS-R showed improved psychometric properties in that it had a higher item separation index than BFCRS-O. BFCRS-R mean logit was closer to zero indicating that the items on the scale and the subjects were better matched than in BFCRS-O. DIF analysis showed that certain items of both versions of BFCRS were influenced by the presence of negative symptoms. BFCRS-R is shorter and simpler than the original version and having better psychometric properties seems to be better suited for identifying and quantifying catatonia in chronic psychotic patients. Copyright (c) 2007 John Wiley & Sons, Ltd.

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

    Science.gov (United States)

    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

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

    Directory of Open Access Journals (Sweden)

    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. Amino acid residues in the Ler protein critical for derepression of the LEE5 promoter in enteropathogenic E. coli.

    Science.gov (United States)

    Choi, Su-Mi; Jeong, Jae-Ho; Choy, Hyon E; Shin, Minsang

    2016-08-01

    Enteropathogenic E. coli causes attaching and effacing (A/E) intestinal lesions. The genes involved in the formation of A/E lesions are encoded within a chromosomal island comprising of five major operons, LEE1-5. The global regulator H-NS represses the expression of these operons. Ler, a H-NS homologue, counteracts the H-NS-mediated repression. Using a novel genetic approach, we identified the amino acid residues in Ler that are involved in the interaction with H-NS: I20 and L23 in the C-terminal portion of α-helix 3, and I42 in the following unstructured linker region.

  19. A linear model for rotors produced by trapped lee waves with a simple representation of boundary layer friction

    Science.gov (United States)

    Teixeira, Miguel A. C.

    2017-04-01

    A linear model is used to diagnose the onset of rotors in flow over 2D ridges, for atmospheres that are neutrally stratified near the surface and stably stratified aloft, with a sharp temperature inversion in between, where trapped lee waves may propagate. This is achieved by coupling an inviscid two-layer mountain-wave model with a bulk boundary-layer model. The full model shows some ability to detect flow stagnation as a function of key input parameters, such as the Froude number and the height of the inversion, by comparison with results from numerical simulations and laboratory experiments carried out by previous authors. The effect of a boundary layer is essential to correctly predict flow stagnation, as the inviscid version of the model severely overestimates the dimensionless critical mountain height necessary for stagnation to occur. An improved model that includes only the effects of mean flow deceleration and amplification of the velocity perturbation within the boundary layer predicts flow stagnation much better in the most non-hydrostatic cases treated here, where waves appear to be directly forced by the orography. However, in the most hydrostatic case, only the full model, taking into account the feedback of the boundary layer on the inviscid flow, satisfactorily predicts flow stagnation, although the corresponding stagnation condition is unable to discriminate between rotors and hydraulic jumps. This is due to the fact that the trapped lee waves associated with the rotors are not forced directly by the orography in this case, but rather seem to be generated indirectly by nonlinear processes. This mechanism is, to a certain extent, mimicked by the modified surface boundary condition adopted in the full model, where an "effective orography" that differs from the real one forces the trapped lee waves. Versions of the model not including this feedback severely underestimate the amplitude of the trapped lee waves in the most hydrostatic case, partly

  20. Okhee Lee, Cory A. Buxton, James A. Banks (ed.), Diversity and equity in science education: research, policy, and practice

    Science.gov (United States)

    Bannier, Betsy J.

    2015-06-01

    Highly relevant for academic study among K-12 educators and the higher education faculty who train pre-service teachers, Diversity and equity in science education highlights three interrelated issues impacting science education in the United States. First, complicated dynamics related to the large and increasing population of English language learning (ELL) students are discussed. Second, the realities of standardized test scores are comparatively explored, both within and beyond the United States. Third, the politics of accountability in education are vigorously discussed. Okhee Lee and Cory A. Buxton weave through the contexts of politics, education, science, and culture to expand existing discourse about how to best educate our nation's children.

  1. Esse tal de Roque Enrow! : a trajetória de Rita Lee de outsider ao mainstream (1967-1985)

    OpenAIRE

    Gohl, Jeffferson William

    2014-01-01

    O presente trabalho acompanhou parte da trajetória da artista Rita Lee Jones no período entre 1967 até 1985. Valendo-se de fontes, discográficas, documentos audiovisuais, documentos de arquivo e discursos produzidos pela imprensa, procurou documentar desde o momento contracultural em que ela participou do grupo Os Mutantes junto aos movimentos da Tropicália, até seu momento de reconhecimento de maturidade artística que ocorre concomitante ao término do Regime Militar autoritário no Brasil. ...

  2. “From Cork […] to St. Peter’s Cupola”: The Idea of Italy in the Writings of Francis Sylvester Mahony

    Directory of Open Access Journals (Sweden)

    Fergus Dunne

    2016-06-01

    Full Text Available This article reconsiders the comparativist aesthetic of Francis SylvesterMahony’s “Prout Papers” in relation to the direct crosscomparisonsof Irish and Italian circumstances in his later Romanjournalism, emphasising the importance of Italy to the two workshe published in book form. It traces the development of Mahony’sthoughts on Catholic identity and nationalist politics in his Italianwritings. The decentred perspective on contemporary Ireland providedby his commentaries on Italian affairs is used to discuss Mahony’sinterest in ‘doubleness’, focussing especially on his sometimesprovocative efforts to arrive at political understanding through thedialectical examination of opposed viewpoints.

  3. Did one ear infection in France change the history of Britain? The illness and death of Francis II (1544-60).

    Science.gov (United States)

    Srouji, Ibrahim Albert

    2009-11-01

    The middle ear has long been considered a continuum of the upper respiratory tract and modern physicians recognize the impact of upper respiratory tract pathology on the middle ear and are familiar with the possible neurosurgical complications of any resultant chronic or acute middle ear infection. In the 16th century, lack of this knowledge may have led to a sequence of events and one of the most important turning points for the British monarchy. This paper on the illness and death of King Francis II of France uncovers interesting aspects of ENT practice from the French Renaissance period and the intrigue surrounding this royal patient's well-documented but little discussed illness.

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

    Directory of Open Access Journals (Sweden)

    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.

  5. Evaluating the performance of the Lee-Carter method and its variants in modelling and forecasting Malaysian mortality

    Science.gov (United States)

    Zakiyatussariroh, W. H. Wan; Said, Z. Mohammad; Norazan, M. R.

    2014-12-01

    This study investigated the performance of the Lee-Carter (LC) method and it variants in modeling and forecasting Malaysia mortality. These include the original LC, the Lee-Miller (LM) variant and the Booth-Maindonald-Smith (BMS) variant. These methods were evaluated using Malaysia's mortality data which was measured based on age specific death rates (ASDR) for 1971 to 2009 for overall population while those for 1980-2009 were used in separate models for male and female population. The performance of the variants has been examined in term of the goodness of fit of the models and forecasting accuracy. Comparison was made based on several criteria namely, mean square error (MSE), root mean square error (RMSE), mean absolute deviation (MAD) and mean absolute percentage error (MAPE). The results indicate that BMS method was outperformed in in-sample fitting for overall population and when the models were fitted separately for male and female population. However, in the case of out-sample forecast accuracy, BMS method only best when the data were fitted to overall population. When the data were fitted separately for male and female, LCnone performed better for male population and LM method is good for female population.

  6. Analyses and optimization of Lee propagation model for LoRa 868 MHz network deployments in urban areas

    Directory of Open Access Journals (Sweden)

    Dobrilović Dalibor

    2017-01-01

    Full Text Available In the recent period, fast ICT expansion and rapid appearance of new technologies raised the importance of fast and accurate planning and deployment of emerging communication technologies, especially wireless ones. In this paper is analyzed possible usage of Lee propagation model for planning, design and management of networks based on LoRa 868MHz technology. LoRa is wireless technology which can be deployed in various Internet of Things and Smart City scenarios in urban areas. The analyses are based on comparison of field measurements with model calculations. Besides the analyses of Lee propagation model usability, the possible optimization of the model is discussed as well. The research results can be used for accurate design, planning and for preparation of high-performance wireless resource management of various Internet of Things and Smart City applications in urban areas based on LoRa or similar wireless technology. The equipment used for measurements is based on open-source hardware.

  7. Tentative identification of polar and mid-polar compounds in extracts from wine lees by liquid chromatography-tandem mass spectrometry in high-resolution mode.

    Science.gov (United States)

    Delgado de la Torre, M P; Priego-Capote, F; Luque de Castro, M D

    2015-06-01

    Sustainable agriculture has a pending goal in the revalorization of agrofood residues. Wine lees are an abundant residue in the oenological industry. This residue, so far, has been used to obtain tartaric acid or pigments but not for being qualitatively characterized as a source of polar and mid-polar compounds such as flavonoids, phenols and essential amino acids. Lees extracts from 11 Spanish wineries have been analyzed by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) in high resolution mode. The high-resolution power of LC-MS/MS has led to the tentative identification of the most representative compounds present in wine lees, comprising primary amino acids, anthocyans, flavanols, flavonols, flavones and non-flavonoid phenolic compounds, among others. Attending to the profile and content of polar and mid-polar compounds in wine lees, this study underlines the potential of wine lees as an exploitable source to isolate interesting compounds. Copyright © 2015 John Wiley & Sons, Ltd.

  8. Grey relational analysis for evaluating the effects of different rates of wine lees-derived biochar application on a plant-soil system with multi-metal contamination.

    Science.gov (United States)

    Xu, Min; Zhu, Qihong; Wu, Jun; He, Yan; Yang, Gang; Zhang, Xiaohong; Li, Li; Yu, Xiaoyu; Peng, Hong; Wang, Lilin

    2018-03-01

    In this study, grey relational analysis (GRA) was used to investigate the effects of different application rates of wine lees-derived biochar on a plant-soil system with multi-metal contamination. A pot experiment was conducted to determine rice growth in multi-metal-contaminated soil amended with samples of wine lees-derived biochar, and 47 indicators (including soil properties, microbial activity, and plant physiology) were selected as evaluation indexes to assess the plant-soil system. The results indicated that higher wine lees-derived biochar application rates (2% W/W) were favorable for soil fertility, the bioconcentration factor (BF), and the mobility factor (MF, %) (with the exception of Cr, Zn, and Hg), but an application of 1% produced the highest plant growth, enzymatic activities, and bacterial diversity. The richness of the bacterial communities was reduced in the soil amended with the wine lees-derived biochar. According to the GRA assessment, the 1% application rate of wine lees-derived biochar was more suitable for restoring the holistic plant-soil system than were the application rates of 0, 0.5, and 2% (W/W). Furthermore, this study shows that GRA is a useful method for evaluating plant-soil systems.

  9. NsrR, GadE, and GadX interplay in repressing expression of the Escherichia coli O157:H7 LEE pathogenicity island in response to nitric oxide.

    Directory of Open Access Journals (Sweden)

    Priscilla Branchu

    2014-01-01

    Full Text Available Expression of genes of the locus of enterocyte effacement (LEE is essential for adherence of enterohemorrhagic Escherichia coli (EHEC to intestinal epithelial cells. Gut factors that may modulate LEE gene expression may therefore influence the outcome of the infection. Because nitric oxide (NO is a critical effector of the intestinal immune response that may induce transcriptional regulation in enterobacteria, we investigated its influence on LEE expression in EHEC O157:H7. We demonstrate that NO inhibits the expression of genes belonging to LEE1, LEE4, and LEE5 operons, and that the NO sensor nitrite-sensitive repressor (NsrR is a positive regulator of these operons by interacting directly with the RNA polymerase complex. In the presence of NO, NsrR detaches from the LEE1/4/5 promoter regions and does not activate transcription. In parallel, two regulators of the acid resistance pathway, GadE and GadX, are induced by NO through an indirect NsrR-dependent mechanism. In this context, we show that the NO-dependent LEE1 down-regulation is due to absence of NsrR-mediated activation and to the repressor effect of GadX. Moreover, the inhibition of expression of LEE4 and LEE5 by NO is due to loss of NsrR-mediated activation, to LEE1 down-regulation and to GadE up-regulation. Lastly, we establish that chemical or cellular sources of NO inhibit the adherence of EHEC to human intestinal epithelial cells. These results highlight the critical effect of NsrR in the regulation of the LEE pathogenicity island and the potential role of NO in the limitation of colonization by EHEC.

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

    Directory of Open Access Journals (Sweden)

    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.

  11. Brown trout in the Lees Ferry reach of the Colorado River—Evaluation of causal hypotheses and potential interventions

    Science.gov (United States)

    Runge, Michael C.; Yackulic, Charles B.; Bair, Lucas S.; Kennedy, Theodore A.; Valdez, Richard A.; Ellsworth, Craig; Kershner, Jeffrey L.; Rogers, R. Scott; Trammell, Melissa A.; Young, Kirk L.

    2018-04-17

    Over the period 2014–2016, the number of nonnative brown trout (Salmo trutta) captured during routine monitoring in the Lees Ferry reach of the Colorado River, downstream of Glen Canyon Dam, began increasing. Management agencies and stakeholders have questioned whether the increase in brown trout in the Lees Ferry reach represents a threat to the endangered humpback chub (Gila cypha), to the rainbow trout (Oncorhynchus mykiss) sport fishery, or to other resources of concern. In this report, we evaluate the evidence for the expansion of brown trout in the Lees Ferry reach, consider a range of causal hypotheses for this expansion, examine the likely efficacy of several potential management interventions to reduce brown trout, and analyze the effects of those interventions on other resources of concern.The brown trout population at Lees Ferry historically consisted of a small number of large fish supported by low levels of immigration from downstream reaches. This population is now showing signs of sustained successful reproduction and is on the cusp of recruiting locally hatched fish into the spawning class, based on analysis with a new integrated population model. The proximate causes of this change in status are a large pulse of immigration in the fall of 2014 and higher reproductive rates in 2015–2017. The ultimate causes of this change are not clear. The pulse of immigrants from downstream reaches in fall 2014 may have been induced by three sequential high-flow releases from the dam in November of 2012–2014, but may also have been the result of a unique set of circumstances unrelated to dam operations. The increase in reproduction may have been the result of any number of changes, including an Allee effect, warmer water temperatures, a decrease in competition from rainbow trout, or fall high-flow releases. Correlations over space and time among predictor variables do not allow us to make a clear inference about the cause of the changes. Under a null causal

  12. The role of upper tropospheric jet streaks and lee-side cyclogenesis in the development of low level jets in the great plains

    Science.gov (United States)

    Uccellini, L. W.

    1980-01-01

    A review of 15 cases of low level jets (LLJ) which developed in the Great Plains is presented. For 12 out of the 15 cases, a systematic upper level flow pattern was isolated which includes the existence of a trough over the southwest United States and the propagation of upper level jet streaks from the Rocky Mountains toward the Great Plains. This flow pattern is responsible for lee side cyclogenesis or lee side troughing that produces the pressure gradients needed for the development of the LLJ. For the other three cases, a blocking ridge existed over the Great Plains and the upper level flow is relatively weak. It is during these situations that the classic, diurnal oscillating LLJ was observed. A more detailed review of four cases indicates that the subsynoptic scale adjustments associated with the upper level jet streak's forcing of lee side cyclogenesis could be an important factor in the development of LLJ's in the Great Plains.

  13. Book Review: Drexl, J., Lee, N. (2013). Pharmaceutical Innovation, Competition and Patent Law : A Trilateral Perspective. Edward Elgar Publishing

    DEFF Research Database (Denmark)

    Minssen, Timo

    2014-01-01

    aspects of “Pharmaceutical Innovation, Competition and Patent Law”. It provides valuable analyses of the fundamental challenges that the pharmaceutical sector encounters on both a global and regional level. The editors and authors have thus compiled an important publication that will provide stimulation......This is a review of the recent publication “Pharmaceutical Innovation, Competition and Patent Law – A Trilateral Perspective”, edited by Max Planck Director Josef Drexl and Finnish scholar Nari Lee (Edward Elgar 2013, 322 p., ISBN 978 0 85793 245 7). In summary, I conclude that the editors, who...... of recent developments that have such a substantial impact on a significant area of law and practice. But are there any flaws? Considering the numerous useful case law citations, as well as the wide scope of the book, it is a little unfortunate that the book does not contain a table of cases...

  14. Mass elevation and lee effects markedly lift the elevational distribution of ground beetles in the Himalaya-Tibet orogen.

    Science.gov (United States)

    Schmidt, Joachim; Böhner, Jürgen; Brandl, Roland; Opgenoorth, Lars

    2017-01-01

    Mass elevation and lee effects markedly influence snow lines and tree lines in high mountain systems. However, their impact on other phenomena or groups of organisms has not yet been quantified. Here we quantitatively studied their influence in the Himalaya-Tibet orogen on the distribution of ground beetles as model organisms, specifically whether the ground beetle distribution increases from the outer to the inner parts of the orogen, against latitudinal effects. We also tested whether July temperature and solar radiation are predictors of the beetle's elevational distribution ranges. Finally, we discussed the general importance of these effects for the distributional and evolutionary history of the biota of High Asia. We modelled spatially explicit estimates of variables characterizing temperature and solar radiation and correlated the variables with the respective lower elevational range of 118 species of ground beetles from 76 high-alpine locations. Both July temperature and solar radiation significantly positively correlated with the elevational ranges of high-alpine beetles. Against the latitudinal trend, the median elevation of the respective species distributions increased by 800 m from the Himalayan south face north to the Transhimalaya. Our results indicate that an increase in seasonal temperature due to mass elevation and lee effects substantially impact the regional distribution patterns of alpine ground beetles of the Himalaya-Tibet orogen and are likely to affect also other soil biota there and in mountain ranges worldwide. Since these effects must have changed during orogenesis, their potential impact must be considered when biogeographic scenarios based on geological models are derived. As this has not been the practice, we believe that large biases likely exist in many paleoecological and evolutionary studies dealing with the biota from the Himalaya-Tibet orogen and mountain ranges worldwide.

  15. The effectiveness of Lee Silverman Voice Treatment therapy issued interactively through an iPad device: A non-inferiority study.

    Science.gov (United States)

    Griffin, Murray; Bentley, John; Shanks, Joseph; Wood, Carly

    2018-04-01

    Introduction This study compared the differences in recorded speech variables between people treated with conventional 'in person' Lee Silverman Voice Treatment (LSVT) and those treated remotely via iPad-based 'Facetime'. Method Eight participants were selected for the iPad LSVT, and 21 similarly matched subjects were selected from existing data to form the 'in person' group. Participants in both groups had diagnosed idiopathic Parkinson's disease and moderate hypokinetic dysarthria. Eighteen sessions of prescribed LSVT comprising a pre-treatment assessment, 16 treatment sessions, and a six months' post-treatment assessment were administered for each person. In both groups, pre- and post-treatment assessments were conducted face-to-face. Performance measures were recorded during assessment and treatment. Average measures were determined for all tasks at all time points and a summary outcome variable was composed from across-task performance. Results Non-inferiority testing confirmed that iPad LSVT was non-inferior in treating all LSVT task 3 variables except generating words, with the 90% upper confidence intervals (CI) lying between the non-inferiority margin of ± 2.25 and zero. The iPad was superior in treating the task 3 rainbow reading passage and describing motor task variables with upper and lower 90% CI values being negative. The improvement in the summary outcome variable score was also superior in the iPad group. Discussion Non-inferiority testing implies that the iPad LSVT is non-inferior in treating task three variables when compared to traditional LSVT. The study supports further development of remote delivery solutions involving the Apple iPad and 'Facetime' system as a means of improving access to services and the participant's experience.

  16. W3C director Tim Berners-Lee to be Knighted by Queen Elizabeth web inventor recognized for contributions to internet development

    CERN Document Server

    2003-01-01

    "Tim Berners-Lee, the inventor of the World Wide Web and director of the World Wide Web Consortium (W3C), will be made a Knight Commander, Order of the British Empire (KBE) by Queen Elizabeth" (1/2 page).

  17. The NAG Sensor NagC Regulates LEE Gene Expression and Contributes to Gut Colonization by Escherichia coli O157:H7

    Directory of Open Access Journals (Sweden)

    Josée Harel

    2017-04-01

    Full Text Available Enterohemorrhagic Escherichia coli (EHEC O157:H7 are human pathogens responsible for bloody diarrhea and renal failures. EHEC employ a type 3 secretion system to attach directly to the human colonic epithelium. This structure is encoded by the locus of enterocyte effacement (LEE whose expression is regulated in response to specific nutrients. In this study, we show that the mucin-derived sugars N-acetylglucosamine (NAG and N-acetylneuraminic acid (NANA inhibit EHEC adhesion to epithelial cells through down-regulation of LEE expression. The effect of NAG and NANA is dependent on NagC, a transcriptional repressor of the NAG catabolism in E. coli. We show that NagC is an activator of the LEE1 operon and a critical regulator for the colonization of mice intestine by EHEC. Finally, we demonstrate that NAG and NANA as well as the metabolic activity of Bacteroides thetaiotaomicron affect the in vivo fitness of EHEC in a NagC-dependent manner. This study highlights the role of NagC in coordinating metabolism and LEE expression in EHEC and in promoting EHEC colonization in vivo.

  18. The Effects of Input Enhancement on Grammar Learning and Comprehension: A Modified Replication of Lee (2007) with Eye-Movement Data

    Science.gov (United States)

    Winke, Paula M.

    2013-01-01

    In his 2007 study "Effects of Textual Enhancement and Topic Familiarity on Korean EFL Students' Reading Comprehension and Learning of Passive Form," Lee demonstrated that learners were better able to correct written sentences that contained incorrect English passive forms after exposure to texts flooded with enhanced (versus…

  19. Numerical simulation of a cavitating draft tube vortex rope in a Francis turbine at part load conditions for different σ-levels

    Science.gov (United States)

    Wack, J.; Riedelbauch, S.

    2017-04-01

    In the present study, numerical investigations of a Francis turbine at model scale are performed. A part load operating point is selected for the analysis with a focus on the cavitating draft tube vortex rope. For three σ-levels, different aspects are investigated. First, the extension of the vapor volume is analyzed and compared to high-speed visualization recordings from the measurements. Furthermore, the pressure fluctuations for different σ-levels are analyzed and compared to experimental data at a measuring point in the draft tube cone. Finally, the impact of the different cavitation volumes on the axial and circumferential velocity distribution is investigated. In addition, the SST and SAS turbulence models are compared for two pressure levels.

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

    Energy Technology Data Exchange (ETDEWEB)

    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.

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

    International Nuclear Information System (INIS)

    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

  2. 3D fluid-structure modelling and vibration analysis for fault diagnosis of Francis turbine using multiple ANN and multiple ANFIS

    Science.gov (United States)

    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.

  3. Attaching and effacing (A/E) lesion formation by enteropathogenic E. coli on human intestinal mucosa is dependent on non-LEE effectors.

    Science.gov (United States)

    Cepeda-Molero, Massiel; Berger, Cedric N; Walsham, Alistair D S; Ellis, Samuel J; Wemyss-Holden, Simon; Schüller, Stephanie; Frankel, Gad; Fernández, Luis Ángel

    2017-10-01

    Enteropathogenic E. coli (EPEC) is a human pathogen that causes acute and chronic pediatric diarrhea. The hallmark of EPEC infection is the formation of attaching and effacing (A/E) lesions in the intestinal epithelium. Formation of A/E lesions is mediated by genes located on the pathogenicity island locus of enterocyte effacement (LEE), which encode the adhesin intimin, a type III secretion system (T3SS) and six effectors, including the essential translocated intimin receptor (Tir). Seventeen additional effectors are encoded by genes located outside the LEE, in insertion elements and prophages. Here, using a stepwise approach, we generated an EPEC mutant lacking the entire effector genes (EPEC0) and intermediate mutants. We show that EPEC0 contains a functional T3SS. An EPEC mutant expressing intimin but lacking all the LEE effectors but Tir (EPEC1) was able to trigger robust actin polymerization in HeLa cells and mucin-producing intestinal LS174T cells. However, EPEC1 was unable to form A/E lesions on human intestinal in vitro organ cultures (IVOC). Screening the intermediate mutants for genes involved in A/E lesion formation on IVOC revealed that strains lacking non-LEE effector/s have a marginal ability to form A/E lesions. Furthermore, we found that Efa1/LifA proteins are important for A/E lesion formation efficiency in EPEC strains lacking multiple effectors. Taken together, these results demonstrate the intricate relationships between T3SS effectors and the essential role non-LEE effectors play in A/E lesion formation on mucosal surfaces.

  4. Attaching and effacing (A/E lesion formation by enteropathogenic E. coli on human intestinal mucosa is dependent on non-LEE effectors.

    Directory of Open Access Journals (Sweden)

    Massiel Cepeda-Molero

    2017-10-01

    Full Text Available Enteropathogenic E. coli (EPEC is a human pathogen that causes acute and chronic pediatric diarrhea. The hallmark of EPEC infection is the formation of attaching and effacing (A/E lesions in the intestinal epithelium. Formation of A/E lesions is mediated by genes located on the pathogenicity island locus of enterocyte effacement (LEE, which encode the adhesin intimin, a type III secretion system (T3SS and six effectors, including the essential translocated intimin receptor (Tir. Seventeen additional effectors are encoded by genes located outside the LEE, in insertion elements and prophages. Here, using a stepwise approach, we generated an EPEC mutant lacking the entire effector genes (EPEC0 and intermediate mutants. We show that EPEC0 contains a functional T3SS. An EPEC mutant expressing intimin but lacking all the LEE effectors but Tir (EPEC1 was able to trigger robust actin polymerization in HeLa cells and mucin-producing intestinal LS174T cells. However, EPEC1 was unable to form A/E lesions on human intestinal in vitro organ cultures (IVOC. Screening the intermediate mutants for genes involved in A/E lesion formation on IVOC revealed that strains lacking non-LEE effector/s have a marginal ability to form A/E lesions. Furthermore, we found that Efa1/LifA proteins are important for A/E lesion formation efficiency in EPEC strains lacking multiple effectors. Taken together, these results demonstrate the intricate relationships between T3SS effectors and the essential role non-LEE effectors play in A/E lesion formation on mucosal surfaces.

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

    Directory of Open Access Journals (Sweden)

    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.

  6. Career, collections, reports and publications of Dr Francis Buchanan (later Hamilton), 1762-1829: natural history studies in Nepal, Burma (Myanmar), Bangladesh and India. Part 1.

    Science.gov (United States)

    Watson, Mark F; Noltie, Henry J

    2016-10-01

    During his 20-year career as a surgeon-naturalist with the British East India Company, Francis Buchanan (later Hamilton, known in botany as Buchanan-Hamilton and in ichthyology as Hamilton-Buchanan) undertook pioneering survey explorations in several diverse regions of the Indian subcontinent. A naturalist at heart, his collections of plants and animals are often the first from such regions, notably Nepal, Burma (Myanmar) and Bangladesh. Buchanan had wide-ranging interests beyond natural history, using his talent for observation and meticulous recording to amass a huge body of information on the lands and peoples he encountered. However, much of this information remains unpublished in his survey reports, journals and other manuscripts, and so his role in the building of knowledge for these areas has been under-appreciated. Although a keen and able botanist, it is ironic that his multitudinous botanical discoveries are particularly poorly known, with the vast majority of his material on this subject languishing unpublished in archival collections. These include his original records and working notes which show the methods he used when dealing with 'information overload' and arranging his syntheses ready for publication. Notable is his experimentation with Jussieu's Natural System for classifying his Nepalese plants, and his recognition of biogeographic links of the Nepalese flora with Europe and Japan - both ahead of his fellow countrymen in Britain and India. The life of Francis Buchanan awaits the attention of a biographer who can do justice to his many interests, activities and influences. This is the first of two papers covering his life, providing an empirical baseline for future research and correcting misinformation that abounds in the literature. These papers outline Buchanan's professional career, concentrating on his activities in the exploration of natural history, and placing them in the wider context of botanical research in India.

  7. Social networks and inference about unknown events: A case of the match between Google's AlphaGo and Sedol Lee.

    Directory of Open Access Journals (Sweden)

    Jonghoon Bae

    Full Text Available This study examines whether the way that a person makes inferences about unknown events is associated with his or her social relations, more precisely, those characterized by ego network density that reflects the structure of a person's immediate social relation. From the analysis of individual predictions over the Go match between AlphaGo and Sedol Lee in March 2016 in Seoul, Korea, this study shows that the low-density group scored higher than the high-density group in the accuracy of the prediction over a future state of a social event, i.e., the outcome of the first game. We corroborated this finding with three replication tests that asked the participants to predict the following: film awards, President Park's impeachment in Korea, and the counterfactual assessment of the US presidential election. Taken together, this study suggests that network density is negatively associated with vision advantage, i.e., the ability to discover and forecast an unknown aspect of a social event.

  8. Economic value of angling on the Colorado River at Lees Ferry: Using secondary data to estimate the influence of seasonality

    Science.gov (United States)

    Bair, Lucas S.; Rogowski, David L.; Neher, Christopher

    2016-01-01

    Glen Canyon Dam (GCD) on the Colorado River in northern Arizona provides water storage, flood control, and power system benefits to approximately 40 million people who rely on water and energy resources in the Colorado River basin. Downstream resources (e.g., angling, whitewater floating) in Glen Canyon National Recreation Area (GCNRA) and Grand Canyon National Park are impacted by the operation of GCD. The GCD Adaptive Management Program was established in 1997 to monitor and research the effects of dam operations on the downstream environment. We utilized secondary survey data and an individual observation travel cost model to estimate the net economic benefit of angling in GCNRA for each season and each type of angler. As expected, the demand for angling decreased with increasing travel cost; the annual value of angling at Lees Ferry totaled US$2.7 million at 2014 visitation levels. Demand for angling was also affected by season, with per-trip values of $210 in the summer, $237 in the spring, $261 in the fall, and $399 in the winter. This information provides insight into the ways in which anglers are potentially impacted by seasonal GCD operations and adaptive management experiments aimed at improving downstream resource conditions.

  9. The contributions of Donald Lee Johnson to understanding the Quaternary geologic and biogeographic history of the California Channel Islands

    Science.gov (United States)

    Muhs, Daniel R.

    2013-01-01

    Over a span of 50 years, native Californian Donald Lee Johnson made a number of memorable contributions to our understanding of the California Channel Islands. Among these are (1) recognizing that carbonate dunes, often cemented into eolianite and derived from offshore shelf sediments during lowered sea level, are markers of glacial periods on the Channel Islands; (2) identifying beach rock on the Channel Islands as the northernmost occurrence of this feature on the Pacific Coast of North America; (3) recognizing of the role of human activities in historic landscape modification; (4) identifying both the biogenic and pedogenic origins of caliche “ghost forests” and laminar calcrete forms on the Channel Islands; (5) providing the first soil maps of several of the islands, showing diverse pathways of pedogenesis; (6) pointing out the importance of fire in Quaternary landscape history on the Channel Islands, based on detailed stratigraphic studies; and (7), perhaps his greatest contribution, clarifying the origin of Pleistocene pygmy mammoths on the Channel Islands, due not to imagined ancient land bridges, but rather the superb swimming abilities of proboscideans combined with lowered sea level, favorable paleowinds, and an attractive paleovegetation on the Channel Islands. Don was a classic natural historian in the great tradition of Charles Darwin and George Gaylord Simpson, his role models. Don’s work will remain important and useful for many years and is an inspiration to those researching the California Channel Islands today.

  10. Comparison of total polyphenols content and antioxidant potential of wines from ‘Welschriesling’ and ‘Sauvignon Blanc’ varieties during ageing on fine lees

    Directory of Open Access Journals (Sweden)

    Jasna Lužar

    2016-10-01

    Full Text Available Phenolic compounds are key components of wine, since they contribute to wine characteristics such as colour, astringency and bitterness. They also act like antioxidants, with mechanisms involving free-radical scavenging that could prevent cardiovascular diseases and cancer. The aim of the present work was to compare the obtained results of total polyphenols content and antioxidant potential (AOP of several white wines (welschriesling and sauvignon blanc during ageing on fine lees. The total polyphenols content decreased in average for 16.1 % in welschriesling wines and for 18.7 % in sauvignon blanc wines in the period of three months of wine ageing on lees. In the same period AOP of wines decreased in average for 16.0 % in welschriesling wines and for 8.0 % in sauvignon blanc wines. Expectedly, the samples with added oak chips in grape must had higher antioxidant potential than others.

  11. A Rasch Analysis of Assessments of Morning and Evening Fatigue in Oncology Patients Using the Lee Fatigue Scale.

    Science.gov (United States)

    Lerdal, Anners; Kottorp, Anders; Gay, Caryl; Aouizerat, Bradley E; Lee, Kathryn A; Miaskowski, Christine

    2016-06-01

    To accurately investigate diurnal variations in fatigue, a measure needs to be psychometrically sound and demonstrate stable item function in relationship to time of day. Rasch analysis is a modern psychometric approach that can be used to evaluate these characteristics. To evaluate, using Rasch analysis, the psychometric properties of the Lee Fatigue Scale (LFS) in a sample of oncology patients. The sample comprised 587 patients (mean age 57.3 ± 11.9 years, 80% women) undergoing chemotherapy for breast, gastrointestinal, gynecological, or lung cancer. Patients completed the 13-item LFS within 30 minutes of awakening (i.e., morning fatigue) and before going to bed (i.e., evening fatigue). Rasch analysis was used to assess validity and reliability. In initial analyses of differential item function, eight of the 13 items functioned differently depending on whether the LFS was completed in the morning or in the evening. Subsequent analyses were conducted separately for the morning and evening fatigue assessments. Nine of the morning fatigue items and 10 of the evening fatigue items demonstrated acceptable goodness-of-fit to the Rasch model. Principal components analyses indicated that both morning and evening assessments demonstrated unidimensionality. Person-separation indices indicated that both morning and evening fatigue scales were able to distinguish four distinct strata of fatigue severity. Excluding four items from the morning fatigue scale and three items from the evening fatigue scale improved the psychometric properties of the LFS for assessing diurnal variations in fatigue severity in oncology patients. Copyright © 2016 American Academy of Hospice and Palliative Medicine. Published by Elsevier Inc. All rights reserved.

  12. Transcriptome analysis of stem development in the tumourous stem mustard Brassica juncea var. tumida Tsen et Lee by RNA sequencing

    Directory of Open Access Journals (Sweden)

    Sun Quan

    2012-04-01

    Full Text Available Abstract Background Tumourous stem mustard (Brassica juncea var. tumida Tsen et Lee is an economically and nutritionally important vegetable crop of the Cruciferae family that also provides the raw material for Fuling mustard. The genetics breeding, physiology, biochemistry and classification of mustards have been extensively studied, but little information is available on tumourous stem mustard at the molecular level. To gain greater insight into the molecular mechanisms underlying stem swelling in this vegetable and to provide additional information for molecular research and breeding, we sequenced the transcriptome of tumourous stem mustard at various stem developmental stages and compared it with that of a mutant variety lacking swollen stems. Results Using Illumina short-read technology with a tag-based digital gene expression (DGE system, we performed de novo transcriptome assembly and gene expression analysis. In our analysis, we assembled genetic information for tumourous stem mustard at various stem developmental stages. In addition, we constructed five DGE libraries, which covered the strains Yong'an and Dayejie at various development stages. Illumina sequencing identified 146,265 unigenes, including 11,245 clusters and 135,020 singletons. The unigenes were subjected to a BLAST search and annotated using the GO and KO databases. We also compared the gene expression profiles of three swollen stem samples with those of two non-swollen stem samples. A total of 1,042 genes with significantly different expression levels occurring simultaneously in the six comparison groups were screened out. Finally, the altered expression levels of a number of randomly selected genes were confirmed by quantitative real-time PCR. Conclusions Our data provide comprehensive gene expression information at the transcriptional level and the first insight into the understanding of the molecular mechanisms and regulatory pathways of stem swelling and development

  13. 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

    Directory of Open Access Journals (Sweden)

    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.

  14. Staarkleidid / Lee Hanael

    Index Scriptorium Estoniae

    Hanael, Lee

    2008-01-01

    10 maailma kuulsamat kleiti kuulusid Marilyn Monroele, Audrey Hepburnile, printsess Dianale, Vivien Leighle, Tina Turnerile, Julia Robertsile, Liz Hurleyle, Sarah Jessica Parkerile, Keira Knightleyle, Jacqueline Kennedyle

  15. HYDROLOGY, LEE COUNTY, TEXAS

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Hydrology data include spatial datasets and data tables necessary for documenting the hydrologic procedures for estimating flood discharges for a Flood Insurance...

  16. HYDRAULICS, LEE COUNTY, MISSISSIPPI

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Recent developments in digital terrain and geospatial database management technology make it possible to protect this investment for existing and future projects to...

  17. HYDROLOGY, LEE COUNTY, MISSISSIPPI

    Data.gov (United States)

    Federal Emergency Management Agency, Department of Homeland Security — Hydrology data include spatial datasets and data tables necessary for documenting the hydrologic procedures for estimating flood discharges for a flood insurance...

  18. Erasmusega Eestisse / Merike Lees

    Index Scriptorium Estoniae

    Lees, Merike, 1976-

    2014-01-01

    Prantsuse noormees Théo Brunie õppis Lumière’i ülikoolis Lyonis kommunikatsiooni. Aasta Erasmuse vahetusüliõpilasena Balti Filmi- ja Meediakoolis kasutas ta võimalust õppida kommunikatsiooni koos filmitegemisega

  19. Lee Nnukwu Ukochukwu

    African Journals Online (AJOL)

    User

    Another form of it has more verses sung in the exact fashion as the first. Kpakpando na-amuke and Nni ndi ... A general trend of harmonizing only the chorus or refrain is observed. Only a few works have harmonized .... Something that looks like a second development begins in bar nine. It is a descending move from the ...

  20. Aluminium and Alzheimer's disease: the science that describes the link

    National Research Council Canada - National Science Library

    Exley, Christopher

    2001-01-01

    ... that has been encircled is the gene for the amyloid precursor protein. (Thanks to Walter Lukiw for supplying this information.) Aluminium and Alzheimer's Disease: The Science that Describes the LinkAluminium and Alzheimer's Disease The Science that Describes the Link Edited by Christopher Exley Birchall Centre for Inorganic Chemistry and Materials Scienc...

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

    Directory of Open Access Journals (Sweden)

    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.

  2. Repensar el Caribe desde los Estudios Culturales: Literatura, Nación, Racialidad y Género en Donnete Francis, April Shemak y Rosamond King

    Directory of Open Access Journals (Sweden)

    Marcelo José Cabarcas Ortega

    2015-01-01

    Full Text Available Desde los estudios literarios y culturales, estas autoras se unen a un creciente número de expertas interesadas en analizar el impacto de las dinámicas neoliberales en los aspectos étnicos, sexuales y de género en el Caribe, ya sea en el archipiélago o en sus bordes continentales. Respecto a este análisis se pueden afirmar, por lo menos, dos rasgos relevantes: el primero es la importancia otorgada a las nuevas diásporas y su efecto en la actualidad; el segundo es la necesidad de ampliar el archivo literario mediante la integración de la música, la fotografía y el performance al proceso tradicional de hermenéutica. Así, al plantearse formas más incluyentes de interpretación, la crítica busca superar lugares comunes ya desgastados por el excesivo uso y sintonizarse con las inquietudes de creadoras y creadores jóvenes respecto a las realidades de la migración y su influjo en el actual redimensionamiento político del cuerpo. En esa medida, April Shemak, Donnete Francis y Rosamond King y otras escritoras problematizan la idea de un Caribe de puro contacto y difusión.

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

    Science.gov (United States)

    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. Numerical experiments on plasma focus for soft x-ray yield scaling laws derivation using Lee model

    International Nuclear Information System (INIS)

    Akel, M.

    2012-09-01

    The required plasma parameters of krypton and xenon at different temperatures were calculated, the x-ray emission properties of plasmas were studied, and based on the corona model the suitable temperature range for generating H-like and He-like ions (therefore soft x-ray emissions) of different gases plasma were found. The code is applied to characterize the plasma focus in different plasma focus devices, and for optimizing the nitrogen, oxygen, neon, argon, krypton and xenon soft x-ray yields based on bank, tubes and operating parameters. It is found that the soft x-ray yield increases with changing pressure until it reaches the maximum value for each plasma focus device. Keeping the bank parameters, operational voltage unchanged but systematically changing other parameters, numerical experiments were performed finding the optimum combination of P o , Z o and 'a' for the maximum soft x-ray yield. Thus we expect to increase the soft x-ray yield of plasma focus device several-fold from its present typical operation; without changing the capacitor bank, merely by changing the electrode configuration and the operating pressure. The Lee model code was also used to run numerical experiments on plasma focus devices for optimizing soft x-ray yield with reducing L o , varying L o and 'a' to get engineering designs with maximum soft x-ray yield for these devices at different experimental conditions and gases. Numerical experiments showed the influence of the gas used in plasma focus and its properties on soft x-ray emission and its properties and then on its applications. Scaling laws for soft x-ray of nitrogen, oxygen, neon, argon, krypton and xenon plasma focus, in terms of energy, peak discharge current and focus pinch current were found. Radiative cooling effects are studied indicating that radiative collapse may be observed for heavy noble gases (Ar, Kr, Xe) for pinch currents even below 100 kA. The results show that the line radiation emission and tube voltages have

  5. Describing Simple Data Access Services Version 1.1

    Science.gov (United States)

    Plante, Ray; Demleitner, Markus; Plante, Raymond; Delago, Jesus; Harrison, Paul; Tody, Doug; Plante, Ray; Demleitner, Markus

    2017-05-01

    An application that queries or consumes descriptions of VO resources must be able to recognize a resource's support for standard IVOA protocols. This specification describes how to describe a service that supports any of the four typed data access protocols - Simple Cone Search (SCS), Simple Image Access (SIA), Simple Spectral Access (SSA), Simple Line Access (SLA) - using the VOResource XML encoding standard. A key part of this specification is the set of VOResource XML extension schemas that define new metadata that are specific to those protocols. This document describes rules for describing such services within the context of IVOA Registries and data discovery as well as the VO Support Interfaces (VOSI) and service self-description. In particular, this document spells out the essential mark-up needed to identify support for a standard protocol and the base URL required to access the interface that supports that protocol.

  6. Chikungunya means 'that which bends up', and describes the ...

    Indian Academy of Sciences (India)

    First page Back Continue Last page Overview Graphics. CHIK virus was first isolated from patients during an epidemic in Tanzania in 1952-53. Chikungunya means 'that which bends up', and describes the symptoms caused by the severe joint pains.

  7. Propositions that describe the intended meaning of Enterprise Architecture

    CSIR Research Space (South Africa)

    Mentz, JC

    2014-09-01

    Full Text Available In scientific inquiry definitions serves the purpose of describing what something is in terms that are concise, precise and allows for clear communication. Since the start of the enterprise architecture (EA) research field the issue...

  8. Zulma Ageitos de Castellanos: Publications and status of described taxa.

    Science.gov (United States)

    Signorelli, Javier H; Urteaga, Diego; Teso, Valeria

    2015-10-28

    Zulma Ageitos de Castellanos was an Argentinian malacologist working in the "Facultad de Ciencias Naturales y Museo" at La Plata University where she taught invertebrate zoology between 1947 and 1990. Her scientific publications are listed in chronological order. Described genus-group and species-group taxa are listed. Information about the type locality and type material, and taxonomic remarks are also provided. Finally, type material of all described taxa was requested and, when located, illustrated.

  9. Layered recognition networks that pre-process, classify, and describe

    Science.gov (United States)

    Uhr, L.

    1971-01-01

    A brief overview is presented of six types of pattern recognition programs that: (1) preprocess, then characterize; (2) preprocess and characterize together; (3) preprocess and characterize into a recognition cone; (4) describe as well as name; (5) compose interrelated descriptions; and (6) converse. A computer program (of types 3 through 6) is presented that transforms and characterizes the input scene through the successive layers of a recognition cone, and then engages in a stylized conversation to describe the scene.

  10. Turbulent Evolution of a Plasma Described Through Classical Mechanics Only

    International Nuclear Information System (INIS)

    Escande, D.F.; Elskens, Y.

    2003-01-01

    For the first time an old dream of the XIXth century comes true: the non trivial evolution of a macroscopic many-body system is described through classical mechanics only. This is done for the relaxation of a warm electron beam in a plasma, which results in the generation of Langmuir turbulence and in the formation of a plateau in the velocity distribution function of the electrons. Our derivation starts from the hamiltonian describing the one-dimensional N-body system corresponding to the beam and plasma bulk electrons in electrostatic interaction. For such a system, the dynamics can be reduced to the resonant interaction of M Langmuir waves with N'( > 1 Langmuir waves with N' >> 1 beam particles. This yields the proof of the classical quasilinear equations describing the coupled evolution of the wave spectrum and of the beam velocity distribution function in the strongly nonlinear regime where their validity is the matter of a longstanding controversy

  11. Algorithm describing pressure distribution of non-contact TNT explosion

    Directory of Open Access Journals (Sweden)

    Radosław Kiciński

    2014-12-01

    Full Text Available [b]Abstract[/b]. The aim of this study is to develop a computational algorithm, describing the shock wave pressure distribution in the space induced by non-contact TNT explosion. The procedure describes pressure distribution on a damp surface of the hull. Simulations have been carried out using Abaqus/CAE. The study also shows the pressure waveform descriptions provided by various authors and presents them in charts. The formulated conclusions convince efficiency of the algorithm application.[b]Keywords:[/b] Underwater explosion, shock wave, CAE, TNT, Kobben class submarine

  12. An autocatalytic kinetic model for describing microbial growth during fermentation.

    Science.gov (United States)

    Ibarz, Albert; Augusto, Pedro E D

    2015-01-01

    The mathematical modelling of the behaviour of microbial growth is widely desired in order to control, predict and design food and bioproduct processing, stability and safety. This work develops and proposes a new semi-empirical mathematical model, based on an autocatalytic kinetic, to describe the microbial growth through its biomass concentration. The proposed model was successfully validated using 15 microbial growth patterns, covering the three most important types of microorganisms in food and biotechnological processing (bacteria, yeasts and moulds). Its main advantages and limitations are discussed, as well as the interpretation of its parameters. It is shown that the new model can be used to describe the behaviour of microbial growth.

  13. Stability of interconnected dynamical systems described on Banach spaces

    Science.gov (United States)

    Rasmussen, R. D.; Michel, A. N.

    1976-01-01

    New stability results for a large class of interconnected dynamical systems (also called composite systems or large scale systems) described on Banach spaces are established. In the present approach, the objective is always the same: to analyze large scale systems in terms of their lower order and simpler subsystems and in terms of their interconnecting structure. The present results provide a systematic procedure of analyzing hybrid dynamical systems (i.e., systems that are described by a mixture of different types of equations). To demonstrate the method of analysis advanced, two specific examples are considered.

  14. Deaf Autism: Common Instructional Practices Described by Deaf Educators

    Science.gov (United States)

    Rutledge, Felicia

    2017-01-01

    The purpose of this research study was to identify common instructional practices described by teachers of the deaf with students who are deaf with autism that increase both student engagement and instructional outcomes. As the diversity of students increase within deaf/hard of hearing programs, research is emerging in the area of deaf autism.…

  15. Performance of density functional theory methods to describe ...

    Indian Academy of Sciences (India)

    ... Lecture Workshops · Refresher Courses · Symposia · Live Streaming. Home; Journals; Journal of Chemical Sciences; Volume 117; Issue 5. Performance of density functional theory methods to describe intramolecular hydrogen shifts. Nelly González-Rivas Andrés Cedillo. Volume 117 Issue 5 September 2005 pp 555-560 ...

  16. Educational Language Practices Described by Preschool Teachers in Norwegian Kindergartens

    Science.gov (United States)

    Hansen, Joakim Evensen; Alvestad, Marit

    2018-01-01

    This article focuses on educational language practices as described by preschool teachers in Norwegian kindergartens in groups consisting of one- to three-year-old children. Research indicates a relationship between high-quality childcare and language development, yet there is a need for more research on educational practices in high-quality…

  17. Stochastic Oscillations of General Relativistic Disks Described by a ...

    Indian Academy of Sciences (India)

    A generalized Langevin equation driven by fractional Brownian motion is used to describe the vertical oscillations of general relativistic disks. By means of numerical calculation method, the displacements, velocities and luminosities of oscillating disks are explicitly obtained for different Hurst exponent H . The results show ...

  18. Using the IMS LD Standard to Describe Learning Designs

    NARCIS (Netherlands)

    Koper, Rob; Miao, Yongwu

    2007-01-01

    Koper, R., & Miao, Y. (2008). Using the IMS LD Standard to Describe Learning Designs. In L. Lockyer, S. Bennet, S. Agostinho & B. Harper (Eds.), Handbook of Research on Learning Design and Learning Objects: Issues, Applications and Technologies (pp. 41-86). IDEA group.

  19. College Students' Judgment of Others Based on Described Eating Pattern

    Science.gov (United States)

    Pearson, Rebecca; Young, Michael

    2008-01-01

    Background: The literature available on attitudes toward eating patterns and people choosing various foods suggests the possible importance of "moral" judgments and desirable personality characteristics associated with the described eating patterns. Purpose: This study was designed to replicate and extend a 1993 study of college students'…

  20. The Tortricidae described by J. C. Fabricius (Lepidoptera)

    DEFF Research Database (Denmark)

    Baixeras, Joaquin; Karsholt, Ole

    2011-01-01

    The identity and nomenclature of the 88 species of Tortricidae (Lepidoptera) described by J. C. Fabricius are reviewed. Type material deposited in the Natural History Museum Denmark is illustrated. Lectotypes for Tinea compositella (Fabricius, 1775), Pyralis rivellana (Fabricius, 1775) and P...

  1. Describing Elementary Teachers' Operative Systems: A Case Study

    Science.gov (United States)

    Dotger, Sharon; McQuitty, Vicki

    2014-01-01

    This case study introduces the notion of an operative system to describe elementary teachers' knowledge and practice. Drawing from complex systems theory, the operative system is defined as the network of knowledge and practices that constituted teachers' work within a lesson study cycle. Data were gathered throughout a lesson study cycle in which…

  2. Avicenna, the first to describe thyroid-related orbitopathy.

    Science.gov (United States)

    Nabipour, Iraj; Burger, Albert; Moharreri, Muhammad-Reza; Azizi, Fereidoun

    2009-01-01

    The history of the association of goiter and orbital disease is discussed. Although Graves and Basedow are credited with the first descriptions of this association, it was described many years earlier between AD 1000 and 1110 by two Persian physicians and philosophers, Avicenna and Al-Jurjani.

  3. Improving models for describing phosphorus cycling in agricultural soils

    Science.gov (United States)

    The mobility of phosphorus in the environment is controlled to a large extent by its sorption to soil. Therefore, an important component of all P loss models is how the model describes the biogeochemical processes governing P sorption and desorption to soils. The most common approach to modeling P c...

  4. 4d-polytopes described by Coxeter diagrams and quaternions

    Energy Technology Data Exchange (ETDEWEB)

    Koca, Mehmet, E-mail: kocam@squ.edu.o [Sultan Qaboos University College of Science, Physics Department P.O Box 36, Al-Khoudh, 123 Muscat (Oman)

    2011-03-01

    4D-polytopes and their dual polytopes can be described as the orbits of the rank-4 Coxeter-Weyl groups. Their symmetries follow from the quaternionic descriptions of the rank-4 Coxeter-Dynkin diagrams. There exists a one to one correspondence between the finite subgroups of quaternions and the rank-4 Coxeter-Weyl groups.

  5. How Vocational Teachers Describe Their Vocational Teacher Identity

    Science.gov (United States)

    Köpsén, Susanne

    2014-01-01

    Given the current demands of Swedish vocational education and the withdrawal of the requirement for formal teacher competence in vocational subject teachers, the aim of this article is to develop knowledge of what it means to be a vocational subject teacher in an upper secondary school, i.e. how vocational subject teachers describe their…

  6. Nomenclature proposal to describe vocal fold motion impairment

    NARCIS (Netherlands)

    Rosen, Clark A.; Mau, Ted; Remacle, Marc; Hess, Markus; Eckel, Hans E.; Young, VyVy N.; Hantzakos, Anastasios; Yung, Katherine C.; Dikkers, Frederik G.

    2016-01-01

    The terms used to describe vocal fold motion impairment are confusing and not standardized. This results in a failure to communicate accurately and to major limitations of interpreting research studies involving vocal fold impairment. We propose standard nomenclature for reporting vocal fold

  7. Nomenclature proposal to describe vocal fold motion impairment

    NARCIS (Netherlands)

    Rosen, Clark A.; Mau, Ted; Remacle, Marc; Hess, Markus; Eckel, Hans E.; Young, VyVy N.; Hantzakos, Anastasios; Yung, Katherine C.; Dikkers, Frederik G.

    The terms used to describe vocal fold motion impairment are confusing and not standardized. This results in a failure to communicate accurately and to major limitations of interpreting research studies involving vocal fold impairment. We propose standard nomenclature for reporting vocal fold

  8. Transparencies used in describing the on-site inspection technologies

    International Nuclear Information System (INIS)

    Patel, V.

    1999-01-01

    The aim of this presentation is to describe the current status for developing the on-site inspection component of the verification regime, the current status of the the on-site operational manual, on-site inspection techniques, technologies and equipment, status of the training and exercise program and the equipment testing program

  9. Performance of density functional theory methods to describe ...

    Indian Academy of Sciences (India)

    Fukui function shows a small dependence with both the exchange and correlation functional and the basis set. Evolution of the Fukui function along the reaction path describes important changes in the basic sites of the corresponding molecules. These results are in agreement with the chemical behavior of those species.

  10. Superintendents Describe Their Leadership Styles: Implications for Practice

    Science.gov (United States)

    Bird, James J.; Wang, Chuang

    2013-01-01

    Superintendents from eight southeastern United States school districts self-described their leadership styles across the choices of autocratic, laissez-faire, democratic, situational, servant, or transformational. When faced with this array of choices, the superintendents chose with arguable equitableness, indicating that successful leaders can…

  11. Use of the gamma function in equations which describe ruminal ...

    African Journals Online (AJOL)

    Goodness of fit of all the functions used to describe fermentation was tested by comparing predicted values calculated from estimates of the parameters of the function studied, with actual values observed in the nylon bags. For example, the cumulative distribution of the gamma function was calculated from estimates of the ...

  12. Describing, Instantiating and Evaluating a Reference Architecture : A Case Study

    NARCIS (Netherlands)

    Avgeriou, Paris

    2003-01-01

    The result of a domain maturing is the emergence of reference architectures that offer numerous advantages to software architects and other stakeholders. However there is no straightforward way to describe a reference architecture and in sequence to design instances for specific systems, while at

  13. Dreams of the Hmong Kingdom: The Quest for Legitimation in French Indochina, 1850- 1960, by Mai Na M. Lee. Madison, University of Wisconsin Press, 2015. 430 pages.

    Directory of Open Access Journals (Sweden)

    Nengher N. Vang

    2015-12-01

    Full Text Available This article provides a book review of Mai Na M. Lee’s Dreams of the Hmong Kingdom: The Quest for Legitimation in French Indochina, 1850-1960. Dreams of the Hmong Kingdom. It highlights the contribution of the book to the historiography of the Hmong and provides a critical assessment of the dichotomous analytical framework that Lee uses to analyze the rivalry between Hmong messianic leaders and Hmong political brokers and the competition between the Ly and Lo clans for paramountcy in French Indochina

  14. Lauren Berlant and Lee Edelman, Sex, Or The Unbearable (Durham: Duke University Press, 2014, pp. 168, ISBN: 9780822355946, £13.99, paperback.

    Directory of Open Access Journals (Sweden)

    Hannah Proctor

    2014-01-01

    Full Text Available 'So few colleges and universities bother to teach human sexuality...so much stigma adheres even to scholarly investigation of sex,' Gayle Rubin lamented in her 1984 essay 'Thinking Sex'. But it was an academic conference on Rubin's work - 'Rethinking Sex', a lavish threeday event, held at the University of Pennsylvania in 2009 - that provided the initial impetus for Lauren Berlant and Lee Edelman to enter into a dialogue on sexuality. The result is Sex, or the Unbearable, published by Duke University Press, the first in a series on queer theory edited by the authors.

  15. Assessment of quality of care among in-patients with postpartum haemorrhage and severe pre-eclampsia at st. Francis hospital nsambya: a criteria-based audit.

    Science.gov (United States)

    Lumala, Alfred; Sekweyama, Peter; Abaasa, Andrew; Lwanga, Humphrey; Byaruhanga, Romano

    2017-01-13

    The maternal mortality ratio of Uganda is still high and the leading causes of maternal mortality are postpartum haemorrhage (PPH), severe pre-eclampsia and eclampsia. Criteria-based audit (CBA) is a way of improving quality of care that has not been commonly used in low income countries. This study aimed at finding out the quality of care provided to patients with these conditions and to find out if the implementation of recommendations from the audit cycle resulted in improvement in quality of care. This study was a CBA following a time series study design. It was done in St. Francis Hospital Nsambya and it involved assessment of adherence to standards of care for PPH, severe pre-eclampsia and eclampsia. An initial audit was done for 3 consecutive months, then findings were presented to health workers and recommendations made; we implemented the recommendations in a subsequent month and this comprised three interventions namely continuing medical education (CME), drills and displaying guidelines; a re-audit was done in the proceeding 3 consecutive months and analysis compared adherence rates of the initial audit with those of the re-audit. Pearson Chi-Square test revealed that the adherence rates of 7 out of 10 standards of care for severe pre-eclampsia/eclampsia were statistically significantly higher in the re-audit than in the initial audit; also, the adherence rates of 3 out of 4 standards of care for PPH were statistically significantly higher in the re-audit than in the initial audit. The giving of feedback on quality of care and the implementation of recommendations made during the CBA including CME, drills and displaying guidelines was associated with improvements in the quality of care for patients with PPH, severe pre-eclampsia and eclampsia.

  16. Collective impact of conventional cardiovascular risk factors and coronary calcium score on clinical outcomes with or without statin therapy: The St Francis Heart Study.

    Science.gov (United States)

    Waheed, Salman; Pollack, Simcha; Roth, Marguerite; Reichek, Nathaniel; Guerci, Alan; Cao, Jie J

    2016-12-01

    The efficacy of statin therapy remains unknown in patients eligible for statin therapy with and without elevated coronary calcium score (CAC). The study sought to evaluate how cardiovascular risk factors, expressed in terms of statin eligibility for primary prevention, and CAC modify clinical outcomes with and without statin therapy. We conducted a post-hoc analysis of the St. Francis Heart Study treatment trial, a double-blind, placebo-controlled randomized controlled trial of atorvastatin (20 mg), vitamin C (1 g), and vitamin E (1000 U) daily, versus placebos in 990 asymptomatic individuals with CAC ≥ 80th percentile for age and gender. Primary cardiovascular outcomes included non-fatal myocardial infarction or coronary death, coronary revascularization, stroke, and peripheral arterial revascularization. We further stratified the treatment and placebo groups by eligibility (eligible when statin indicated) for statin therapy based on 2013 ACC/AHA guidelines and based on CAC categories. After a median follow-up of 4.8 years, cardiovascular events had occurred in 3.9% of the statin treated but not eligible, 4.6% of the untreated and not eligible, 8.9% of the treated and eligible and 13.4% of the untreated and eligible groups, respectively (p300) occurred frequently in more than 35% of the statin not eligible subjects and was associated with a high 10-year event rate (≥17 per 100 person-years). Risk prediction improved significantly when both clinical risk profile and CAC score were combined (net reclassification index p = 0.002). Under the current statin treatment guidelines a small number of statin eligible subjects with low CAC might not benefit from statin therapy within 5 years. However, the statin not eligible subjects with high CAC have high event rate attributing to loss of opportunity for effective primary prevention. Copyright © 2016 Elsevier Ireland Ltd. All rights reserved.

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

    Science.gov (United States)

    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.

  18. A geostatistical approach for describing spatial pattern in stream networks

    Science.gov (United States)

    Ganio, L.M.; Torgersen, C.E.; Gresswell, R.E.

    2005-01-01

    The shape and configuration of branched networks influence ecological patterns and processes. Recent investigations of network influences in riverine ecology stress the need to quantify spatial structure not only in a two-dimensional plane, but also in networks. An initial step in understanding data from stream networks is discerning non-random patterns along the network. On the other hand, data collected in the network may be spatially autocorrelated and thus not suitable for traditional statistical analyses. Here we provide a method that uses commercially available software to construct an empirical variogram to describe spatial pattern in the relative abundance of coastal cutthroat trout in headwater stream networks. We describe the mathematical and practical considerations involved in calculating a variogram using a non-Euclidean distance metric to incorporate the network pathway structure in the analysis of spatial variability, and use a non-parametric technique to ascertain if the pattern in the empirical variogram is non-random.

  19. Describing spatial pattern in stream networks: A practical approach

    Science.gov (United States)

    Ganio, L.M.; Torgersen, C.E.; Gresswell, R.E.

    2005-01-01

    The shape and configuration of branched networks influence ecological patterns and processes. Recent investigations of network influences in riverine ecology stress the need to quantify spatial structure not only in a two-dimensional plane, but also in networks. An initial step in understanding data from stream networks is discerning non-random patterns along the network. On the other hand, data collected in the network may be spatially autocorrelated and thus not suitable for traditional statistical analyses. Here we provide a method that uses commercially available software to construct an empirical variogram to describe spatial pattern in the relative abundance of coastal cutthroat trout in headwater stream networks. We describe the mathematical and practical considerations involved in calculating a variogram using a non-Euclidean distance metric to incorporate the network pathway structure in the analysis of spatial variability, and use a non-parametric technique to ascertain if the pattern in the empirical variogram is non-random.

  20. Dynamic modelling of pectin extraction describing yield and functional characteristics

    DEFF Research Database (Denmark)

    Andersen, Nina Marianne; Cognet, T.; Santacoloma, P. A.

    2017-01-01

    A dynamic model of pectin extraction is proposed that describes pectin yield, degree of esterification and intrinsic viscosity. The dynamic model is one dimensional in the peel geometry and includes mass transport of pectin by diffusion and reaction kinetics of hydrolysis, degradation and de......-esterification. The model takes into account the effects of the process conditions such as temperature and acid concentration on extraction kinetics. It is shown that the model describes pectin bulk solution concentration, degree of esterification and intrinsic viscosity in pilot scale extractions from lime peel...... at different temperatures (60 °C, 70 °C, 80 °C) and pH (1.5, 2.3, 3.1) values....

  1. Coming to terms about describing Golden Eagle reproduction

    Science.gov (United States)

    Steenhof, Karen; Kochert, Michael N.; McIntyre, Carol L.; Brown, Jessi L.

    2017-01-01

    Clearly defined terms are essential for reporting and understanding research findings, and inconsistent terminology can complicate efforts to compare findings from different studies. In this article, we reiterate and clarify recommended terms for describing Golden Eagle (Aquila chrysaetos) territory occupancy and reproduction. Several authors have provided recommendations for reporting data on raptor reproduction, but our literature review showed that authors continue to use different, often ambiguous and undefined, terms. The inconsistent use of terminology by researchers has been continued and expanded by lawmakers, regulators, and managers, perpetuating confusion. We recommend that authors clearly define and reference all terminology that they use, and we caution against use of the term “active” to describe a nest or nesting territory, because it is tainted with a history of inconsistent use. We provide a glossary of recommended terms for Golden Eagles and other large, long-lived raptors.

  2. National survey describing and quantifying students with communication needs.

    Science.gov (United States)

    Andzik, Natalie R; Schaefer, John M; Nichols, Robert T; Chung, Yun-Ching

    2018-01-01

    Research literature has yet to quantify and describe how students with complex communication needs are supported in the classroom and how special educators are being prepared to offer support. This study sought out special educators to complete a survey about their students with complex communication needs. Over 4,000 teachers representing 50 states reported on the communicative and behavioral characteristics of 15,643 students. Teachers described the training they have received and instructional approaches they used. The majority of students were reported to use speech as their primary communication mode. Over half of students utilizing alternative and augmentative communication (AAC) were reported to have non-proficient communication. Teacher training varied across respondents as well as the supports they used to support these students in the classroom. The majority of students with disabilities using AAC when communicating across the nation are not proficiently communicating. Implications and recommendations will be discussed.

  3. On new gravitational instantons describing creation of braneworlds

    CERN Document Server

    Bouhmadi-Lopez, M; Zhuk, A

    2002-01-01

    By considering five-dimensional cosmological models with a bulk filled with a pressureless scalar field or equivalently dust matter, and a negative cosmological constant, we have found a regular instantonic solution which is free from any singularity at the origin of the extra coordinate. This instanton describes the five-dimensional asymptotically anti-de Sitter wormhole, when the bulk has a topology RxS sup 4. Compactified braneworld instantons which are built up from such an instantonic solution describe either a single brane or a string of branes. Their analytical continuation to the pseudo-Riemannian metric can give rise to either four-dimensional inflating branes or solutions with the same dynamical behaviour for extra dimension and branes, in addition to multitemporal solutions. Dust braneworld models with arbitrary dimensions (D>=5) as well as other spatial topologies are also briefly discussed.

  4. Double sigmoidal models describing the growth of coffee berries

    Directory of Open Access Journals (Sweden)

    Tales Jesus Fernandes

    Full Text Available ABSTRACT: This study aimed to verify if the growth pattern of coffee berries, considering fresh mass accumulation over time, is double sigmoid and to select the most suitable nonlinear model to describe such behavior. Data used consisted of fourteen longitudinal observations of average fresh mass of coffee berries obtained in an experiment with the cultivar Obatã IAC 1669-20. The fits provided by the Logistic and Gompertz models were compared in their single and double versions. Parameters were estimated using the least squares method using the Gauss-Newton algorithm implemented in the nls function of the R software. It can be concluded that the growth pattern of the coffee fruit, in fresh mass accumulation, is double sigmoid. The double Gompertz and double Logistic models were adequate to describe such a growth curve, with a superiority of the double Logistic model.

  5. Polychaete species (Annelida) described from the Philippine and China Seas.

    Science.gov (United States)

    Salazar-Vallejo, Sergio I; Carrera-Parra, Luis F; Muir, Alexander I; De León-González, Jesús Angel; Piotrowski, Christina; Sato, Masanori

    2014-07-30

    The South China and Philippine Seas are among the most diverse regions in the Western Pacific. Although there are several local polychaete checklists available, there is none comprising the whole of this region. Presented herein is a comprehensive list of the original names of all polychaete species described from the region. The list contains 1037 species, 345 genera and 60 families; the type locality, type depository, and information regarding synonymy are presented for each species. 

  6. The scentscape: An integrative framework describing scents in servicescapes

    OpenAIRE

    Girard, Marc; Girard, Anna; Suppin, Anna-Caroline; Bartsch, Silke

    2016-01-01

    The systematic use of ambient scents is a trend in service companies that is accompanied by increasing research attention. However, we lack a theoretical framework that ad-dresses ambient scents' specific role in physical surroundings of services. Thus, this article develops the 'scentscape', a model that describes the process of olfactory stimulation and its impacts on customers and employees in service environments. The paper extends Bitner's servicescape model (1992) and combines it with G...

  7. Describing abortion attitudes among young, African American men.

    Science.gov (United States)

    Woodhams, Elisabeth J; Hill, Brandon J; Fabiyi, Camille; Gilliam, Melissa

    2016-08-01

    This paper describes African American teenaged males' attitudes and perspectives on abortion. Data were derived from a larger cross-sectional survey of African American males aged 14-19, living in the south side of Chicago. Acceptability of abortion varied by partner type, such that 60% of teenagers felt abortion was acceptable with a casual partner while 37% found it acceptable with committed partners (pattitudes toward abortion. Copyright © 2016 Elsevier Inc. All rights reserved.

  8. Turbulent Evolution of a Plasma Described Through Classical Mechanics Only

    Science.gov (United States)

    Escande, D. F.; Elskens, Y.

    2003-06-01

    For the first time an old dream of the XIXth century comes true: the non trivial evolution of a macroscopic many-body system is described through classical mechanics only. This is done for the relaxation of a warm electron beam in a plasma, which results in the generation of Langmuir turbulence and in the formation of a plateau in the velocity distribution function of the electrons. Our derivation starts from the hamiltonian describing the one-dimensional N-body system corresponding to the beam and plasma bulk electrons in electrostatic interaction. For such a system, the dynamics can be reduced to the resonant interaction of M Langmuir waves with N'(≪ N) beam particles. The rigorous analytical calculation of a quasilinear diffusion coefficient is performed for the chaotic motion of a particle in a quite general set of prescribed longitudinal waves with random phases and large amplitudes. This result proves to be extendable within controllable approximations to the self-consistent evolution of M ≫ 1 Langmuir waves with N' ≫ 1 beam particles. This yields the proof of the classical quasilinear equations describing the coupled evolution of the wave spectrum and of the beam velocity distribution function in the strongly nonlinear regime where their validity is the matter of a longstanding controversy.

  9. The challenges of describing rehabilitation services: A discussion paper

    Directory of Open Access Journals (Sweden)

    Cecilie Røe

    2017-11-01

    Full Text Available To apply the Classification of Service Organization in Rehabilitation (ICSO-R classification of services to different target groups, include the user perspective, identify missing categories, and propose standardized descriptors for the categories from a Norwegian perspective. Expert-based consensus conferences with user involvement. Health professionals, stakeholders and users. Participants were divided into 5 panels, which applied the ICSO-R to describe the habilitation and rehabilitation services provided to children with cerebral palsy and people with Huntington’s disease, acquired brain injuries (traumatic brain injuries and stroke and painful musculoskeletal conditions. Based on the Problem/Population, Intervention, Comparison, Outcome (PICO framework, the services were described according to the ICSO-R. Missing categories were identified. The ICSO-R was found to be feasible and applicable for describing a variety of services provided to different target groups in Norway, but the user perspective was lacking, categories were missing, and a need for standardized description of the categories was identified. The present work supports the need to produce an updated version of the ICSO-R and to encourage national and international discussion of the framework. The ICSO-R has the potential to become a tool for the standardized assessment of rehabilitation services. For such purposes, more standardized descriptions of subcategories are necessary.

  10. HERMES: A Model to Describe Deformation, Burning, Explosion, and Detonation

    Energy Technology Data Exchange (ETDEWEB)

    Reaugh, J E

    2011-11-22

    HERMES (High Explosive Response to MEchanical Stimulus) was developed to fill the need for a model to describe an explosive response of the type described as BVR (Burn to Violent Response) or HEVR (High Explosive Violent Response). Characteristically this response leaves a substantial amount of explosive unconsumed, the time to reaction is long, and the peak pressure developed is low. In contrast, detonations characteristically consume all explosive present, the time to reaction is short, and peak pressures are high. However, most of the previous models to describe explosive response were models for detonation. The earliest models to describe the response of explosives to mechanical stimulus in computer simulations were applied to intentional detonation (performance) of nearly ideal explosives. In this case, an ideal explosive is one with a vanishingly small reaction zone. A detonation is supersonic with respect to the undetonated explosive (reactant). The reactant cannot respond to the pressure of the detonation before the detonation front arrives, so the precise compressibility of the reactant does not matter. Further, the mesh sizes that were practical for the computer resources then available were large with respect to the reaction zone. As a result, methods then used to model detonations, known as {beta}-burn or program burn, were not intended to resolve the structure of the reaction zone. Instead, these methods spread the detonation front over a few finite-difference zones, in the same spirit that artificial viscosity is used to spread the shock front in inert materials over a few finite-difference zones. These methods are still widely used when the structure of the reaction zone and the build-up to detonation are unimportant. Later detonation models resolved the reaction zone. These models were applied both to performance, particularly as it is affected by the size of the charge, and to situations in which the stimulus was less than that needed for reliable

  11. Topography and vegetation as predictors of snow water equivalent across the alpine treeline ecotone at Lee Ridge, Glacier National Park, Montana, U.S.A.

    Science.gov (United States)

    Geddes, C.A.; Brown, D.G.; Fagre, D.B.

    2005-01-01

    We derived and implemented two spatial models of May snow water equivalent (SWE) at Lee Ridge in Glacier National Park, Montana. We used the models to test the hypothesis that vegetation structure is a control on snow redistribution at the alpine treeline ecotone (ATE). The statistical models were derived using stepwise and "best" subsets regression techniques. The first model was derived from field measurements of SWE, topography, and vegetation taken at 27 sample points. The second model was derived using GIS-based measures of topography and vegetation. Both the field- (R² = 0.93) and GIS-based models (R² = 0.69) of May SWE included the following variables: site type (based on vegetation), elevation, maximum slope, and general slope aspect. Site type was identified as the most important predictor of SWE in both models, accounting for 74.0% and 29.5% of the variation, respectively. The GIS-based model was applied to create a predictive map of SWE across Lee Ridge, predicting little snow accumulation on the top of the ridge where vegetation is scarce. The GIS model failed in large depressions, including ephemeral stream channels. The models supported the hypothesis that upright vegetation has a positive effect on accumulation of SWE above and beyond the effects of topography. Vegetation, therefore, creates a positive feedback in which it modifies its, environment and could affect the ability of additional vegetation to become established.

  12. Samuel Holden Parsons Lee (1772-1863): American physician, entrepreneur and selfless fighter of the 1798 Yellow Fever epidemic of New London, Connecticut.

    Science.gov (United States)

    Mattie, James K; Desai, Sukumar P

    2015-02-01

    Samuel Holden Parsons Lee practised medicine at a time when the germ theory of disease had not yet been proposed and antibiotics remained undiscovered. In 1798 he served selflessly as the only physician in town who was willing to battle the Yellow Fever outbreak of New London, Connecticut. Because he practised at the dawn of the age of patent medicine, unfortunately his name also came to be associated with medical quackery. We argue that his contributions have been grossly underestimated. He compounded and vended medications - including bilious pills and bitters - that were gold standards of the day. Moreover, one preparation for treatment of kidney stones led to his sub-specialization in this field and was met with such success that its sale continued for nearly 100 years after his death. While a talented medical man, Lee also had a knack for business, finding success in trading, whaling and real estate. © The Author(s) 2013 Reprints and permissions: sagepub.co.uk/journalsPermissions.nav.

  13. Analytical simulation platform describing projections in computed tomography systems

    International Nuclear Information System (INIS)

    Youn, Hanbean; Kim, Ho Kyung

    2013-01-01

    To reduce the patient dose, several approaches such as spectral imaging using photon counting detectors and statistical image reconstruction, are being considered. Although image-reconstruction algorithms may significantly enhance image quality in reconstructed images with low dose, true signal-to-noise properties are mainly determined by image quality in projections. We are developing an analytical simulation platform describing projections to investigate how quantum-interaction physics in each component configuring CT systems affect image quality in projections. This simulator will be very useful for an improved design or optimization of CT systems in economy as well as the development of novel image-reconstruction algorithms. In this study, we present the progress of development of the simulation platform with an emphasis on the theoretical framework describing the generation of projection data. We have prepared the analytical simulation platform describing projections in computed tomography systems. The remained further study before the meeting includes the following: Each stage in the cascaded signal-transfer model for obtaining projections will be validated by the Monte Carlo simulations. We will build up energy-dependent scatter and pixel-crosstalk kernels, and show their effects on image quality in projections and reconstructed images. We will investigate the effects of projections obtained from various imaging conditions and system (or detector) operation parameters on reconstructed images. It is challenging to include the interaction physics due to photon-counting detectors into the simulation platform. Detailed descriptions of the simulator will be presented with discussions on its performance and limitation as well as Monte Carlo validations. Computational cost will also be addressed in detail. The proposed method in this study is simple and can be used conveniently in lab environment

  14. Effect of Display Color on Pilot Performance and Describing Functions

    Science.gov (United States)

    Chase, Wendell D.

    1997-01-01

    A study has been conducted with the full-spectrum, calligraphic, computer-generated display system to determine the effect of chromatic content of the visual display upon pilot performance during the landing approach maneuver. This study utilizes a new digital chromatic display system, which has previously been shown to improve the perceived fidelity of out-the-window display scenes, and presents the results of an experiment designed to determine the effects of display color content by the measurement of both vertical approach performance and pilot-describing functions. This method was selected to more fully explore the effects of visual color cues used by the pilot. Two types of landing approaches were made: dynamic and frozen range, with either a landing approach scene or a perspective array display. The landing approach scene was presented with either red runway lights and blue taxiway lights or with the colors reversed, and the perspective array with red lights, blue lights, or red and blue lights combined. The vertical performance measures obtained in this experiment indicated that the pilots performed best with the blue and red/blue displays. and worst with the red displays. The describing-function system analysis showed more variation with the red displays. The crossover frequencies were lowest with the red displays and highest with the combined red/blue displays, which provided the best overall tracking, performance. Describing-function performance measures, vertical performance measures, and pilot opinion support the hypothesis that specific colors in displays can influence the pilots' control characteristics during the final approach.

  15. [Health consequences of smoking electronic cigarettes are poorly described].

    Science.gov (United States)

    Tøttenborg, Sandra Søgaard; Holm, Astrid Ledgaard; Wibholm, Niels Christoffer; Lange, Peter

    2014-09-01

    Despite increasing popularity, health consequences of vaping (smoking electronic cigarettes, e-cigarettes) are poorly described. Few studies suggest that vaping has less deleterious effects on lung function than smoking conventional cigarettes. One large study found that e-cigarettes were as efficient as nicotine patches in smoking cessation. The long-term consequences of vaping are however unknown and while some experts are open towards e-cigarettes as a safer way of satisfying nicotine addiction, others worry that vaping in addition to presenting a health hazard may lead to an increased number of smokers of conventional cigarettes.

  16. A Model Describing Stable Coherent Synchrotron Radiation in Storage Rings

    International Nuclear Information System (INIS)

    Sannibale, F.

    2004-01-01

    We present a model describing high power stable broadband coherent synchrotron radiation (CSR) in the terahertz frequency region in an electron storage ring. The model includes distortion of bunch shape from the synchrotron radiation (SR), which enhances higher frequency coherent emission, and limits to stable emission due to an instability excited by the SR wakefield. It gives a quantitative explanation of several features of the recent observations of CSR at the BESSY II storage ring. We also use this model to optimize the performance of a source for stable CSR emission

  17. A model describing stable coherent synchrotron radiation in storage rings

    International Nuclear Information System (INIS)

    Sannibale, F.; Byrd, J.M.; Loftsdottir, A.; Venturini, M.; Abo-Bakr, M.; Feikes, J.; Holldack, K.; Kuske, P.; Wuestefeld, G.; Huebers, H.-W.; Warnock, R.

    2004-01-01

    We present a model describing high power stable broadband coherent synchrotron radiation (CSR) in the terahertz frequency region in an electron storage ring. The model includes distortion of bunch shape from the synchrotron radiation (SR), which enhances higher frequency coherent emission, and limits to stable emission due to an instability excited by the SR wakefield. It gives a quantitative explanation of several features of the recent observations of CSR at the BESSY II storage ring. We also use this model to optimize the performance of a source for stable CSR emission

  18. A model to describe the performance of the UASB reactor.

    Science.gov (United States)

    Rodríguez-Gómez, Raúl; Renman, Gunno; Moreno, Luis; Liu, Longcheng

    2014-04-01

    A dynamic model to describe the performance of the Upflow Anaerobic Sludge Blanket (UASB) reactor was developed. It includes dispersion, advection, and reaction terms, as well as the resistances through which the substrate passes before its biotransformation. The UASB reactor is viewed as several continuous stirred tank reactors connected in series. The good agreement between experimental and simulated results shows that the model is able to predict the performance of the UASB reactor (i.e. substrate concentration, biomass concentration, granule size, and height of the sludge bed).

  19. Theory of control systems described by differential inclusions

    CERN Document Server

    Han, Zhengzhi; Huang, Jun

    2016-01-01

    This book provides a brief introduction to the theory of finite dimensional differential inclusions, and deals in depth with control of three kinds of differential inclusion systems. The authors introduce the algebraic decomposition of convex processes, the stabilization of polytopic systems, and observations of Luré systems. They also introduce the elemental theory of finite dimensional differential inclusions, and the properties and designs of the control systems described by differential inclusions. Addressing the material with clarity and simplicity, the book includes recent research achievements and spans all concepts, concluding with a critical mathematical framework. This book is intended for researchers, teachers and postgraduate students in the area of automatic control engineering.

  20. Orthogonal polynomials describing polarization aberration for rotationally symmetric optical systems.

    Science.gov (United States)

    Xu, Xiangru; Huang, Wei; Xu, Mingfei

    2015-10-19

    Optical lithography has approached a regime of high numerical aperture and wide field, where the impact of polarization aberration on imaging quality turns to be serious. Most of the existing studies focused on the distribution rule of polarization aberration on the pupil, and little attention had been paid to the field. In this paper, a new orthonormal set of polynomials is established to describe the polarization aberration of rotationally symmetric optical systems. The polynomials can simultaneously reveal the distribution rules of polarization aberration on the exit pupil and the field. Two examples are given to verify the polynomials.

  1. Describing Quadratic Cremer Point Polynomials by Parabolic Perturbations

    DEFF Research Database (Denmark)

    Sørensen, Dan Erik Krarup

    1996-01-01

    We describe two infinite order parabolic perturbation proceduresyielding quadratic polynomials having a Cremer fixed point. The main ideais to obtain the polynomial as the limit of repeated parabolic perturbations.The basic tool at each step is to control the behaviour of certain externalrays.Polynomials...... the existence of polynomials having an explicitlygiven external ray accumulating both at the Cremer point and at its non-periodicpreimage. We think of the Julia set as containing a "topologists double comb".In the one-sided case we prove a weaker result: the existence of polynomials havingan explicitly given...

  2. Workplace culture in psychiatric nursing described by nurses.

    Science.gov (United States)

    Kurjenluoma, K; Rantanen, A; McCormack, B; Slater, P; Hahtela, N; Suominen, T

    2017-12-01

    This study looks to describe the workplace culture from the viewpoints of stress, job satisfaction and practice environment. Data were collected from nurses (n = 109) using a web-based survey, The Person-Centred Nursing Index, from two purposefully selected hospital districts in Finland. Data were statistically analysed. Nurses described their workplace culture in slightly positive terms. Nurses only occasionally experienced stress (mean = 2.56, SD = 0.55) and were fairly satisfied with their job (mean = 4.75, SD = 0.66) and their practice environment (mean = 4.42, SD = 0.81). Demographic variables such as the nurses' age, length of time in nursing, time at their present hospital, working shifts and their use of patient restriction were more frequently associated with their perceived workplace culture. Older nurses and those with a longer work history in the nursing profession tended to be more satisfied with their workplace culture in psychiatric nursing. Young and/or newly graduated nurses felt more negatively on their workplace culture; this issue should be recognised and addressed with appropriate support and mentoring. Nurses who used restrictive measures were more often less satisfied with their workplace culture. Continuous efforts are needed to reduce the use of coercive measures, which challenge also the managers to support nursing practice to be more person-centred. © 2017 Nordic College of Caring Science.

  3. Experimental investigation of statistical models describing distribution of counts

    International Nuclear Information System (INIS)

    Salma, I.; Zemplen-Papp, E.

    1992-01-01

    The binomial, Poisson and modified Poisson models which are used for describing the statistical nature of the distribution of counts are compared theoretically, and conclusions for application are considered. The validity of the Poisson and the modified Poisson statistical distribution for observing k events in a short time interval is investigated experimentally for various measuring times. The experiments to measure the influence of the significant radioactive decay were performed with 89 Y m (T 1/2 =16.06 s), using a multichannel analyser (4096 channels) in the multiscaling mode. According to the results, Poisson statistics describe the counting experiment for short measuring times (up to T=0.5T 1/2 ) and its application is recommended. However, analysis of the data demonstrated, with confidence, that for long measurements (T≥T 1/2 ) Poisson distribution is not valid and the modified Poisson function is preferable. The practical implications in calculating uncertainties and in optimizing the measuring time are discussed. Differences between the standard deviations evaluated on the basis of the Poisson and binomial models are especially significant for experiments with long measuring time (T/T 1/2 ≥2) and/or large detection efficiency (ε>0.30). Optimization of the measuring time for paired observations yields the same solution for either the binomial or the Poisson distribution. (orig.)

  4. Colour in flux: describing and printing colour in art

    Science.gov (United States)

    Parraman, Carinna

    2008-01-01

    This presentation will describe artists, practitioners and scientists, who were interested in developing a deeper psychological, emotional and practical understanding of the human visual system who were working with wavelength, paint and other materials. From a selection of prints at The Prints and Drawings Department at Tate London, the presentation will refer to artists who were motivated by issues relating to how colour pigment was mixed and printed, to interrogate and explain colour perception and colour science, and in art, how artists have used colour to challenge the viewer and how a viewer might describe their experience of colour. The title Colour in Flux refers, not only to the perceptual effect of the juxtaposition of one colour pigment with another, but also to the changes and challenges for the print industry. In the light of screenprinted examples from the 60s and 70s, the presentation will discuss 21 st century ideas on colour and how these notions have informed the Centre for Fine Print Research's (CFPR) practical research in colour printing. The latter part of this presentation will discuss the implications for the need to change methods in mixing inks that moves away from existing colour spaces, from non intuitive colour mixing to bespoke ink sets, colour mixing approaches and colour mixing methods that are not reliant on RGB or CMYK.

  5. A new eigenfunction spatial analysis describing population genetic structure.

    Science.gov (United States)

    Diniz-Filho, José Alexandre Felizola; Diniz, João Vitor Barnez P L; Rangel, Thiago Fernando; Soares, Thannya Nascimento; Telles, Mariana Pires de Campos; Collevatti, Rosane Garcia; Bini, Luis Mauricio

    2013-12-01

    Several methods of spatial analyses have been proposed to infer the relative importance of evolutionary processes on genetic population structure. Here we show how a new eigenfunction spatial analysis can be used to model spatial patterns in genetic data. Considering a sample of n local populations, the method starts by modeling the response variable (allele frequencies or phenotypic variation) against the eigenvectors sequentially extracted from a geographic distance matrix (n × n). The relationship between the coefficient of determination (R(2)) of the models and the cumulative eigenvalues, which we named the spatial signal-representation (SSR) curve, can be more efficient than Moran's I correlograms in describing different patterns. The SSR curve was also applied to simulated data (under distinct scenarios of population differentiation) and to analyze spatial patterns in alleles from microsatellite data for 25 local populations of Dipteryx alata, a tree species endemic to the Brazilian Cerrado. The SSR curves are consistent with previous phylogeographical patterns of the species, revealing combined effects of isolation-by-distance and range expansion. Our analyses demonstrate that the SSR curve is a useful exploratory tool for describing spatial patterns of genetic variability and for selecting spatial eigenvectors for models aiming to explain spatial responses to environmental variables and landscape features.

  6. CPT: an open system that describes all that you do.

    Science.gov (United States)

    Thorwarth, William T

    2008-04-01

    The American Medical Association, with the cooperation of multiple major medical specialty societies, including the ACR, responded in 1966 to the need for a complete coding system for describing medical procedures and services with the first publication of Current Procedural Terminology (CPT). This system, now CPT IV, forms the basis of reporting of virtually all inpatient and outpatient services performed by physicians and nonphysician health care providers as well as facilities. This coding system and its maintenance process have evolved in complexity and sophistication, particularly in the past decade, such that it is now integral to all facets of health care, including tracking new and investigational procedures and reporting and monitoring performance measures (read "pay for performance"), in addition to its long-standing use for reporting for reimbursement. To paraphrase a recent automobile commercial, "This is not your father's CPT." The author describes the development of CPT as it exists today, examining the forces that molded its current form, the input opportunities available to medical specialty societies and others, the ever increasing transparency of the CPT maintenance process, and the availability of resources allowing all to stay current. Understanding this system, critical to the practice of all of medicine, including radiology, will aid all health care providers in maintaining the quality, efficiency, and accuracy of their practices' business operations as well as assist them in a world of increasingly complex reporting requirements.

  7. Matrix formalism to describe functional states of transcriptional regulatory systems.

    Directory of Open Access Journals (Sweden)

    Erwin P Gianchandani

    2006-08-01

    Full Text Available Complex regulatory networks control the transcription state of a genome. These transcriptional regulatory networks (TRNs have been mathematically described using a Boolean formalism, in which the state of a gene is represented as either transcribed or not transcribed in response to regulatory signals. The Boolean formalism results in a series of regulatory rules for the individual genes of a TRN that in turn can be used to link environmental cues to the transcription state of a genome, thereby forming a complete transcriptional regulatory system (TRS. Herein, we develop a formalism that represents such a set of regulatory rules in a matrix form. Matrix formalism allows for the systemic characterization of the properties of a TRS and facilitates the computation of the transcriptional state of the genome under any given set of environmental conditions. Additionally, it provides a means to incorporate mechanistic detail of a TRS as it becomes available. In this study, the regulatory network matrix, R, for a prototypic TRS is characterized and the fundamental subspaces of this matrix are described. We illustrate how the matrix representation of a TRS coupled with its environment (R* allows for a sampling of all possible expression states of a given network, and furthermore, how the fundamental subspaces of the matrix provide a way to study key TRS features and may assist in experimental design.

  8. Motion in a stochastic layer described by symbolic dynamics

    Energy Technology Data Exchange (ETDEWEB)

    Misguich, J.H.; Reuss, J.D. [Association Euratom-CEA, Centre d`Etudes Nucleaires de Cadarache, 13 - Saint-Paul-lez-Durance (France). Dept. de Recherches sur la Fusion Controlee; Elskens, Y. [Universite de Provence, 13 - Marseille (France); Balescu, R. [Association Euratom, Brussels (Belgium)

    1997-07-01

    The motion in the stochastic layer surrounding an island can be studied by using the standard map: this problem is of direct relevance to the diffusion of magnetic field lines in a tokamak. In a previous work it was shown that this process can be adequately modelled by a continuous time random walk (CTRW) describing transitions of the running point between three basins representing, respectively, trapped motion around the island, and passing motion above or below the island. The sticking property of the island deeply modifies the nature of the transport process, leading to sub-diffusive behavior. In the present work it is shown that the motion can be analyzed in terms of a symbolic dynamics which leads to the possibility of an automatic measurement of the data necessary for the construction of the CTRW. The logical features of the procedure are described, and the method is applied to an analysis of long time series, thus completing the results of the previous work. (author) 10 refs.

  9. 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

    International Nuclear Information System (INIS)

    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

  10. Describing the impact of health research: a Research Impact Framework

    Directory of Open Access Journals (Sweden)

    Pleasant Andrew

    2006-10-01

    Full Text Available Abstract Background Researchers are increasingly required to describe the impact of their work, e.g. in grant proposals, project reports, press releases and research assessment exercises. Specialised impact assessment studies can be difficult to replicate and may require resources and skills not available to individual researchers. Researchers are often hard-pressed to identify and describe research impacts and ad hoc accounts do not facilitate comparison across time or projects. Methods The Research Impact Framework was developed by identifying potential areas of health research impact from the research impact assessment literature and based on research assessment criteria, for example, as set out by the UK Research Assessment Exercise panels. A prototype of the framework was used to guide an analysis of the impact of selected research projects at the London School of Hygiene and Tropical Medicine. Additional areas of impact were identified in the process and researchers also provided feedback on which descriptive categories they thought were useful and valid vis-à-vis the nature and impact of their work. Results We identified four broad areas of impact: I. Research-related impacts; II. Policy impacts; III. Service impacts: health and intersectoral and IV. Societal impacts. Within each of these areas, further descriptive categories were identified. For example, the nature of research impact on policy can be described using the following categorisation, put forward by Weiss: Instrumental use where research findings drive policy-making; Mobilisation of support where research provides support for policy proposals; Conceptual use where research influences the concepts and language of policy deliberations and Redefining/wider influence where research leads to rethinking and changing established practices and beliefs. Conclusion Researchers, while initially sceptical, found that the Research Impact Framework provided prompts and descriptive

  11. Describing the impact of health research: a Research Impact Framework.

    Science.gov (United States)

    Kuruvilla, Shyama; Mays, Nicholas; Pleasant, Andrew; Walt, Gill

    2006-10-18

    Researchers are increasingly required to describe the impact of their work, e.g. in grant proposals, project reports, press releases and research assessment exercises. Specialised impact assessment studies can be difficult to replicate and may require resources and skills not available to individual researchers. Researchers are often hard-pressed to identify and describe research impacts and ad hoc accounts do not facilitate comparison across time or projects. The Research Impact Framework was developed by identifying potential areas of health research impact from the research impact assessment literature and based on research assessment criteria, for example, as set out by the UK Research Assessment Exercise panels. A prototype of the framework was used to guide an analysis of the impact of selected research projects at the London School of Hygiene and Tropical Medicine. Additional areas of impact were identified in the process and researchers also provided feedback on which descriptive categories they thought were useful and valid vis-à-vis the nature and impact of their work. We identified four broad areas of impact: I. Research-related impacts; II. Policy impacts; III. Service impacts: health and intersectoral and IV. Societal impacts. Within each of these areas, further descriptive categories were identified. For example, the nature of research impact on policy can be described using the following categorisation, put forward by Weiss: Instrumental use where research findings drive policy-making; Mobilisation of support where research provides support for policy proposals; Conceptual use where research influences the concepts and language of policy deliberations and Redefining/wider influence where research leads to rethinking and changing established practices and beliefs. Researchers, while initially sceptical, found that the Research Impact Framework provided prompts and descriptive categories that helped them systematically identify a range of specific and

  12. Principal spectra describing magnetooptic permittivity tensor in cubic crystals

    Energy Technology Data Exchange (ETDEWEB)

    Hamrlová, Jana [Nanotechnology Centre, VSB – Technical University of Ostrava, listopadu 15, Ostrava, 708 33 Czech Republic (Czech Republic); IT4Innovations Centre, VSB – Technical University of Ostrava, listopadu 15, Ostrava, 708 33 Czech Republic (Czech Republic); Legut, Dominik [IT4Innovations Centre, VSB – Technical University of Ostrava, listopadu 15, Ostrava, 708 33 Czech Republic (Czech Republic); Veis, Martin [Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, Prague, 121 16 Czech Republic (Czech Republic); Pištora, Jaromír [Nanotechnology Centre, VSB – Technical University of Ostrava, listopadu 15, Ostrava, 708 33 Czech Republic (Czech Republic); Hamrle, Jaroslav, E-mail: jaroslav.hamrle@vsb.cz [IT4Innovations Centre, VSB – Technical University of Ostrava, listopadu 15, Ostrava, 708 33 Czech Republic (Czech Republic); Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, Prague, 121 16 Czech Republic (Czech Republic); Department of Physics, VSB – Technical University of Ostrava, 17. listopadu 15, Ostrava, 708 33 Czech Republic (Czech Republic)

    2016-12-15

    We provide unified phenomenological description of magnetooptic effects being linear and quadratic in magnetization. The description is based on few principal spectra, describing elements of permittivity tensor up to the second order in magnetization. Each permittivity tensor element for any magnetization direction and any sample surface orientation is simply determined by weighted summation of the principal spectra, where weights are given by crystallographic and magnetization orientations. The number of principal spectra depends on the symmetry of the crystal. In cubic crystals owning point symmetry we need only four principal spectra. Here, the principal spectra are expressed by ab initio calculations for bcc Fe, fcc Co and fcc Ni in optical range as well as in hard and soft x-ray energy range, i.e. at the 2p- and 3p-edges. We also express principal spectra analytically using modified Kubo formula.

  13. Describing linguistic information in a behavioural framework: Possible or not?

    Energy Technology Data Exchange (ETDEWEB)

    De Cooman, G. [Universiteit Gent, Zwijnaarde (Belgium)

    1996-12-31

    The paper discusses important aspects of the representation of linguistic information, using imprecise probabilities with a behavioural interpretation. We define linguistic information as the information conveyed by statements in natural language, but restrict ourselves to simple affirmative statements of the type {open_quote}subject-is-predicate{close_quote}. Taking the behavioural stance, as it is described in detail, we investigate whether it is possible to give a mathematical model for this kind of information. In particular, we evaluate Zadeli`s suggestion that we should use possibility measures to this end. We come to tile conclusion that, generally speaking, possibility measures are possibility models for linguistic information, but that more work should be done in order to evaluate the suggestion that they may be the only ones.

  14. Elements that describe a dictatorship in Latin America

    Directory of Open Access Journals (Sweden)

    José Fernando Valencia Grajales

    2016-01-01

    Full Text Available The dictatorships in Latin America have had a special development, because they have manifested themselves in diverse forms. These have done so from the traditional form to the semidemocratic forms of maintaining in the government to personages that absorb and they are perpetuated in the power and that in spite of having the support of its electors, these really stay there for reasons such as the Fear or imminence, the submission or incapacity of the other powers and above all by the systematic elimination of real political contenders, to which is added the ignorance of the dictator meaning, is for that reason that the present one tried to give a definition of dictatorship, will describe Its elements, will make a tour of Latin America with respect to its dictators and finally try some conclusions.

  15. Construction of Virtual Psychology Laboratory Describing Exploratory Experimental Behavior

    Science.gov (United States)

    Nakaike, Ryuichi; Miwa, Kazuhisa

    In the present study, we show a simulated experiment environment, VPL(Virtual Psychology Laboratory), for visualizing user's exploratory experimental behavior, and present two main modules of the environment: (1) a cognitive simulator and (2) a system for automatically describing experimenter's behavior based on EBS (Exploratory Behavior Schema) proposed by the author. Users use this environment as an experimental psychologist who investigates human collaborative discovery. They experience many trials of conducting experiments using the simulated environment, and analyze by themselves their experimental processes based on the description of their behavior by EBS. It is expected that learners can notice their errors of experimental planning and refine various types of knowledge related to the experimental skills by repeating the experimental activities in this environment.

  16. Using Persistent Homology to Describe Rayleigh-Bénard Convection

    Science.gov (United States)

    Tithof, Jeffrey; Suri, Balachandra; Xu, Mu; Kramar, Miroslav; Levanger, Rachel; Mischaikow, Konstantin; Paul, Mark; Schatz, Michael

    2015-11-01

    Complex spatial patterns that exhibit aperiodic dynamics commonly arise in a wide variety of systems in nature and technology. Describing, understanding, and predicting the behavior of such patterns is an open problem. We explore the use of persistent homology (a branch of algebraic topology) to characterize spatiotemporal dynamics in a canonical fluid mechanics problem, Rayleigh Bénard convection. Persistent homology provides a powerful mathematical formalism in which the topological characteristics of a pattern (e.g. the midplane temperature field) are encoded in a so-called persistence diagram. By applying a metric to measure the pairwise distances across multiple persistence diagrams, we can quantify the similarities between different states in a time series. Our results show that persistent homology yields new physical insights into the complex dynamics of large spatially extended systems that are driven far-from-equilibrium. This work is supported under NSF grant DMS-1125302.

  17. Chapter 35: Describing Data and Data Collections in the VO

    Science.gov (United States)

    Kent, B. R.; Hanisch, R. J.; Williams, R. D.

    The list of numbers: 19.22, 17.23, 18.11, 16.98, and 15.11, is of little intrinsic interest without information about the context in which they appear. For instance, are these daily closing stock prices for your favorite investment, or are they hourly photometric measurements of an increasingly bright quasar? The information needed to define this context is called metadata. Metadata are data about data. Astronomers are familiar with metadata through the headers of FITS files and the names and units associated with columns in a table or database. In the VO, metadata describe the contents of tables, images, and spectra, as well as aggregate collections of data (archives, surveys) and computational services. Moreover, VO metadata are constructed according to rules that avoid ambiguity and make it clear whether, in the example above, the stock prices are in dollars or euros, or the photometry is Johnson V or Sloan g. Organization of data is important in any scientific discipline. Equally crucial are the descriptions of that data: the organization publishing the data, its creator or the person making it available, what instruments were used, units assigned to measurement, calibration status, and data quality assessment. The Virtual Observatory metadata scheme not only applies to datasets, but to resources as well, including data archive facilities, searchable web forms, and online analysis and display tools. Since the scientific output flowing from large datasets depends greatly on how well the data are described, it is important for users to understand the basics of the metadata scheme in order to locate the data that they want and use it correctly. Metadata are the key to data discovery and data and service interoperability in the Virtual Observatory.

  18. Angular momentum and torque described with the complex octonion

    International Nuclear Information System (INIS)

    Weng, Zi-Hua

    2014-01-01

    The paper aims to adopt the complex octonion to formulate the angular momentum, torque, and force etc in the electromagnetic and gravitational fields. Applying the octonionic representation enables one single definition of angular momentum (or torque, force) to combine some physics contents, which were considered to be independent of each other in the past. J. C. Maxwell used simultaneously two methods, the vector terminology and quaternion analysis, to depict the electromagnetic theory. It motivates the paper to introduce the quaternion space into the field theory, describing the physical feature of electromagnetic and gravitational fields. The spaces of electromagnetic field and of gravitational field can be chosen as the quaternion spaces, while the coordinate component of quaternion space is able to be the complex number. The quaternion space of electromagnetic field is independent of that of gravitational field. These two quaternion spaces may compose one octonion space. Contrarily, one octonion space can be separated into two subspaces, the quaternion space and S-quaternion space. In the quaternion space, it is able to infer the field potential, field strength, field source, angular momentum, torque, and force etc in the gravitational field. In the S-quaternion space, it is capable of deducing the field potential, field strength, field source, current continuity equation, and electric (or magnetic) dipolar moment etc in the electromagnetic field. The results reveal that the quaternion space is appropriate to describe the gravitational features, including the torque, force, and mass continuity equation etc. The S-quaternion space is proper to depict the electromagnetic features, including the dipolar moment and current continuity equation etc. In case the field strength is weak enough, the force and the continuity equation etc can be respectively reduced to that in the classical field theory

  19. Lineage grammars: describing, simulating and analyzing population dynamics.

    Science.gov (United States)

    Spiro, Adam; Cardelli, Luca; Shapiro, Ehud

    2014-07-21

    Precise description of the dynamics of biological processes would enable the mathematical analysis and computational simulation of complex biological phenomena. Languages such as Chemical Reaction Networks and Process Algebras cater for the detailed description of interactions among individuals and for the simulation and analysis of ensuing behaviors of populations. However, often knowledge of such interactions is lacking or not available. Yet complete oblivion to the environment would make the description of any biological process vacuous. Here we present a language for describing population dynamics that abstracts away detailed interaction among individuals, yet captures in broad terms the effect of the changing environment, based on environment-dependent Stochastic Tree Grammars (eSTG). It is comprised of a set of stochastic tree grammar transition rules, which are context-free and as such abstract away specific interactions among individuals. Transition rule probabilities and rates, however, can depend on global parameters such as population size, generation count, and elapsed time. We show that eSTGs conveniently describe population dynamics at multiple levels including cellular dynamics, tissue development and niches of organisms. Notably, we show the utilization of eSTG for cases in which the dynamics is regulated by environmental factors, which affect the fate and rate of decisions of the different species. eSTGs are lineage grammars, in the sense that execution of an eSTG program generates the corresponding lineage trees, which can be used to analyze the evolutionary and developmental history of the biological system under investigation. These lineage trees contain a representation of the entire events history of the system, including the dynamics that led to the existing as well as to the extinct individuals. We conclude that our suggested formalism can be used to easily specify, simulate and analyze complex biological systems, and supports modular

  20. Tubular adenoma of the urinary tract: a newly described entity.

    Science.gov (United States)

    Kao, Chia-Sui; Epstein, Jonathan I

    2013-09-01

    Tubular adenomas in the urinary tract with the same appearance as those in the gastrointestinal tract have not yet been described in the literature. We herein report 4 cases of tubular adenomas in the urinary tract encountered within our consult practice. This lesion was defined by the presence of a collection of small round tubular glands with intestinal-type epithelium showing moderate dysplasia, identical to the histology of tubular adenomas in the intestinal tract. Patients ranged in age from 37 to 63 years (mean, 45 years), with 3 of the 4 being male (male-to-female ratio, 3:1). The locations were urinary bladder, prostatic urethra and ureter with hematuria, polyps, and obstructive mass as their presentations, respectively. One lesion was large measuring 1.4 cm associated with pseudoinvasion as well as invasive adenocarcinoma. Immunohistochemically, the tubular adenomas stained positive for CDX2 and CK20, while negative for GATA3 and CK7. One case showed positive nuclear β-catenin staining. Tubular adenoma of the urinary tract is a rare lesion, and recognition of this entity will encourage further reports and help to better understand the relation of tubular adenoma to concurrent and subsequent urinary tract malignancies. Copyright © 2013 Elsevier Inc. All rights reserved.

  1. Sex education in Swedish schools as described by young women.

    Science.gov (United States)

    Ekstrand, Maria; Engblom, Camilla; Larsson, Margareta; Tydén, Tanja

    2011-06-01

    To investigate sex education in Swedish schools regarding content, satisfaction, and suggested improvements, as described by teenagers and young adults. Waiting-room survey conducted among 225 female patients (aged 13-25) at youth and student health clinics in one large-, and one medium-sized Swedish city. Most participants (97%, n = 218) had received sex education in school, of varying content and quality. Sixty percent thought basic body development was sufficiently covered. Insufficiently covered topics included sexual assault (96%), sexual harassment (94%), pornography (90%), abortion (81%), emergency contraception (80%), fertility (80%), and pregnancy (59%). Thirty percent received no information about chlamydia, and almost half reported that condyloma and human papillomavirus had not been addressed. The youngest respondents (13-19 years) were significantly more likely to have been told about emergency contraception, homosexuality, bisexuality, and transsexuality. Nearly half (46%) considered 'acceptable' the knowledge gained from sex education provided at school whereas more than a third considered it 'poor' or 'very poor'. Suggested improvements included more information, more discussion, greater emphasis on sexual diversity, and more knowledgeable teachers. Content and quality of sex education varied greatly. Most respondents thought many topics were insufficiently covered, sex education should be more extensive, and teachers better educated.

  2. Entropic-Skins Geometry to Describe Wall Turbulence Intermittency

    Directory of Open Access Journals (Sweden)

    Diogo Queiros-Conde

    2015-04-01

    Full Text Available In order to describe the phenomenon of intermittency in wall turbulence and, more particularly, the behaviour of moments  and and intermittency exponents ζP with the order p and distance to the wall, we developed a new geometrical framework called “entropic-skins geometry” based on the notion of scale-entropy which is here applied to an experimental database of boundary layer flows. Each moment has its own spatial multi-scale support Ωp (“skin”. The model assumes the existence of a hierarchy of multi-scale sets Ωp ranged from the “bulk” to the “crest”. The crest noted characterizes the geometrical support where the most intermittent (the highest fluctuations in energy dissipation occur; the bulk is the geometrical support for the whole range of fluctuations. The model assumes then the existence of a dynamical flux through the hierarchy of skins. The specific case where skins display a fractal structure is investigated. Bulk fractal dimension  and crest dimension  are linked by a scale-entropy flux defining a reversibility efficiency  (d is the embedding dimension. The model, initially developed for homogeneous and isotropic turbulent flows, is applied here to wall bounded turbulence where intermittency exponents are measured by extended self-similarity. We obtained for intermittency exponents the analytical expression with γ ≈ 0.36 in agreement with experimental results.

  3. Inference of random walk models to describe leukocyte migration

    Science.gov (United States)

    Jones, Phoebe J. M.; Sim, Aaron; Taylor, Harriet B.; Bugeon, Laurence; Dallman, Magaret J.; Pereira, Bernard; Stumpf, Michael P. H.; Liepe, Juliane

    2015-12-01

    While the majority of cells in an organism are static and remain relatively immobile in their tissue, migrating cells occur commonly during developmental processes and are crucial for a functioning immune response. The mode of migration has been described in terms of various types of random walks. To understand the details of the migratory behaviour we rely on mathematical models and their calibration to experimental data. Here we propose an approximate Bayesian inference scheme to calibrate a class of random walk models characterized by a specific, parametric particle re-orientation mechanism to observed trajectory data. We elaborate the concept of transition matrices (TMs) to detect random walk patterns and determine a statistic to quantify these TM to make them applicable for inference schemes. We apply the developed pipeline to in vivo trajectory data of macrophages and neutrophils, extracted from zebrafish that had undergone tail transection. We find that macrophage and neutrophils exhibit very distinct biased persistent random walk patterns, where the strengths of the persistence and bias are spatio-temporally regulated. Furthermore, the movement of macrophages is far less persistent than that of neutrophils in response to wounding.

  4. Describing the Breakbone Fever: IDODEN, an Ontology for Dengue Fever

    Science.gov (United States)

    Mitraka, Elvira; Topalis, Pantelis; Dritsou, Vicky; Dialynas, Emmanuel; Louis, Christos

    2015-01-01

    Background Ontologies represent powerful tools in information technology because they enhance interoperability and facilitate, among other things, the construction of optimized search engines. To address the need to expand the toolbox available for the control and prevention of vector-borne diseases we embarked on the construction of specific ontologies. We present here IDODEN, an ontology that describes dengue fever, one of the globally most important diseases that are transmitted by mosquitoes. Methodology/Principal Findings We constructed IDODEN using open source software, and modeled it on IDOMAL, the malaria ontology developed previously. IDODEN covers all aspects of dengue fever, such as disease biology, epidemiology and clinical features. Moreover, it covers all facets of dengue entomology. IDODEN, which is freely available, can now be used for the annotation of dengue-related data and, in addition to its use for modeling, it can be utilized for the construction of other dedicated IT tools such as decision support systems. Conclusions/Significance The availability of the dengue ontology will enable databases hosting dengue-associated data and decision-support systems for that disease to perform most efficiently and to link their own data to those stored in other independent repositories, in an architecture- and software-independent manner. PMID:25646954

  5. Formal verification of digital circuits described in VHDL

    Science.gov (United States)

    Salem, Ashraf Mohammed El-Farghly

    1992-01-01

    The formal verification of digital circuits described in VHSIC (very high speed integrated circuit) hardware description language (VHDL) is presented. VHDL is made processable by proof tools. A subset, called P-VHDL, dedicated to the description of combinatorial and synchronous sequential circuits is defined. The semantics of this subset is much simpler than the complete VHDL. The delta delay is replaced by a serialization function, and the time scale is chosen equal to the clock period. The use of the finite state machine as a formal model for the subset became possible. The finite state machine semantics is shown to represent the P-VHDL semantics. Based on this formal model, a proof oriented compiler for P-VHDL is written. A complete denotational semantic for P-VHDL is defined. Three different domains for the three values holders in the language are proposed: the variables, the signals, and the registers. Formal semantics for the VHDL timing constructs are given. The equivalence between these semantics and the VHDL informal operational semantics is proven. It is shown that semantics can form a basis for building a formal timing verifier.

  6. The complexity of organizational change: describing communication during organizational turbulence.

    Science.gov (United States)

    Salem, Philip

    2013-01-01

    Organizational researchers and practitioners have been interested in organizational change for some time. Historically, they have directed most of their efforts at improving the efficiency of planned top-down change. These efforts were strategic attempts at altering parameters leading to transformational change. Most efforts failed to meet their intended purposes. Transformational organizational change has not been likely. The legitimate systems have been robust. There has been little systematic investigation of the communication occurring during these efforts. The purpose of this essay is to describe results of a mixed methods research project answering two research questions. (a) How do organizational members communicate during a time of turbulence? (b) What features of this communication suggest the potential for or resistance to transformative change? Comparing the results at the beginning of the period to other periods, gives insight into how social actors communicate and enact the organization during a threshold period where transformational change was possible. Results reveal identifiable patterns of communication as communication strategies, parameters, or basins of attraction. The overall pattern explains how micro communication patterns intersect and how the accumulation of these patterns may resist or accomplish change at a macro level.

  7. [Nursing between ethic and aesthetic. Profession described by media].

    Science.gov (United States)

    Gradellini, Cinzia; Idamou, Sara; Lusetti, Simona

    2013-01-01

    Nurse's role, according to the media, does not fit the role and evolution that nursing had in these last years: nursing remains unknown to public. Objective of research is to define how nurse's image is described by media. analysis of two newspapers, at national and local level with respect to articles about nurses, taking into account numbers of articles, position, topic (malpractice, frauds/crimes, job/economical cuts, praise). A second part of research has been focused on online newspapers, by using key words. Analysis of television medical dramas about presence of nurse, competences, relationship with physician/patient, social elements, context of work (acute or chronic), impact on patients welfare, and eventually ethical-deontological aspects has been carried out. on three hundred articles related health context, thirty-nine talk about nurse; five of those are in first page. 39% of articles regards frauds/crimes, 19% job/economical cuts, 15% malpractice. With respect to online articles, 66% concerns frauds/crimes. In medical dramas there is small attention to nurse who has generic competence as well as other health professional but doctor. The nurse character is played only by women. a low level of professionalism comes out both from newspaper and television. A specific professional identity is often absent furthermore nurses are relegated to a role of weakness in work and private circumstance.

  8. Parameterization effects in nonlinear models to describe growth curves

    Directory of Open Access Journals (Sweden)

    Tales Jesus Fernandes

    2015-10-01

    Full Text Available Various parameterizations of nonlinear models are common in the literature.In addition to complicating the understanding of these models, these parameterizations affect the nonlinearity measures and subsequently the inferences about the parameters. Bates and Watts (1980 quantified model nonlinearity using the geometric concept of curvature. Here we aimed to evaluate the three most common parameterizations of the Logistic and Gompertz nonlinear models with a focus on their nonlinearity and how this might affect inferences, and to establish relations between the parameters under the various expressions of the models. All parameterizations were adjusted to the growth data from pequi fruit. The intrinsic and parametric curvature described by Bates and Watts were calculated for each parameter. The choice of parameterization affects the nonlinearity measures, thus influencing the reliability and inferences about the estimated parameters. The most used methodologies presented the highest distance from linearity, showing the importance of analyzing these measures in any growth curve study. We propose that the parameterization in which the estimate of B is the abscissa of the inflection point should be used because of the lower deviations from linearity and direct biological interpretation for all parameters.

  9. ESCAPE DYNAMICS AS A WAY TO DESCRIBE ECONOMIC PHENOMENA

    Directory of Open Access Journals (Sweden)

    Bogomolova A. S.

    2017-06-01

    Full Text Available This paper presents the review of issues and approaches to the analysis of escape dynamics in economic models with constant gain adaptive learning which is used to model and describe the behavior of various (macroeconomic as well as microeconomic variables in diverse economic phenomena such as currency crises, inflation episodes, endogenous collusion in oligopoly, and cycles of economic activity. This review considers and contrasts two currently existing approaches to the analysis of escape dynamics: the discrete-time approach employed, for example, by Cho, Williams and Sargent (2002, and the continuous-time approach proposed by Kasa (2004 and extended recently by Kolyuzhnov, Bogomolova and Slobodyan (2014, stressing the advantages of the latter. The continuous-time approach is based on the application of the results of the continuous-time version of the large deviations theory to the diffusion approximation of the original discrete-time dynamics under learning. Escape dynamics is characterized by analytically deriving the most probable escape point and mean escape time. The paper provides an example of the continuous-time approach applied to the Phelps problem of a government controlling inflation while adaptively learning the approximate Phillips curve.

  10. North American matsutake: names clarified and a new species described.

    Science.gov (United States)

    Trudell, Steven A; Xu, Jianping; Saar, Irja; Justo, Alfredo; Cifuentes, Joaquin

    2017-01-01

    Tricholoma matsutake, known widely as "matsutake," has great commercial and cultural significance in Japan. Because Japanese production is insufficient to meet the high domestic demand, morphologically similar mushrooms, thought by many to belong to T. magnivelare, are imported from western North America. However, molecular data produced since the early 2000s have indicated that more than one species of matsutake occur in North America and this raises the question of correct naming for the different species. To address this question, we assessed the phylogenetic diversity within North American matsutake based on nuc rDNA ITS1-5.8S-ITS2 (internal transcribed spacer [ITS] barcode) sequences, including newly obtained sequences from the type collections for Agaricus ponderosus and Armillaria arenicola, and morphological characters. Our results agree with earlier indications that three matsutake species occur in North America and allow us to clarify the correct application of names-T. magnivelare from the eastern USA and Canada, T. murrillianum from the western USA and Canada, and T. mesoamericanum from Mexico, newly described here. The existence of the three North American species is further supported by the results of evolutionary divergence analysis, geographical distributions, and morphological characters.

  11. Kinetic isotope effects and how to describe them

    Directory of Open Access Journals (Sweden)

    Konstantin Karandashev

    2017-11-01

    Full Text Available We review several methods for computing kinetic isotope effects in chemical reactions including semiclassical and quantum instanton theory. These methods describe both the quantization of vibrational modes as well as tunneling and are applied to the ⋅H + H2 and ⋅H + CH4 reactions. The absolute rate constants computed with the semiclassical instanton method both using on-the-fly electronic structure calculations and fitted potential-energy surfaces are also compared directly with exact quantum dynamics results. The error inherent in the instanton approximation is found to be relatively small and similar in magnitude to that introduced by using fitted surfaces. The kinetic isotope effect computed by the quantum instanton is even more accurate, and although it is computationally more expensive, the efficiency can be improved by path-integral acceleration techniques. We also test a simple approach for designing potential-energy surfaces for the example of proton transfer in malonaldehyde. The tunneling splittings are computed, and although they are found to deviate from experimental results, the ratio of the splitting to that of an isotopically substituted form is in much better agreement. We discuss the strengths and limitations of the potential-energy surface and based on our findings suggest ways in which it can be improved.

  12. A simple analytical expression to describe tidal damping or amplification

    Science.gov (United States)

    Savenije, H. H. G.

    2001-03-01

    Can a single line describe tidal damping or amplification? Tidal damping and amplification in alluvial estuaries are constrained by an implicit feedback mechanism. The time lag ɛ between the occurrence of high water and high water slack is crucial in this regard. An analytical solution of the St. Venant equations appears to result in a surprisingly simple explicit relation for the tidal range, consisting of an exponential and a linear term. In alluvial estuaries, the linear term is dominant, particularly in the case of tidal amplification. In the case of tidal damping the exponential term only becomes important in the upper reaches of the estuary (preventing the expression for the tidal range from becoming negative). In tidal amplification, the exponential term is suppressed by the newly defined tidal Froude Number which (as it contains sin ɛ) tends to zero when the tidal wave gets a predominantly standing wave character. This negative feedback prevents the development of an exponentially increasing tidal range. Finally, the expression obtained is a very useful explicit equation to determine estuary parameters that are difficult to determine from direct observations, such as the roughness and the mean water depth.

  13. Armillaria mexicana, a newly described species from Mexico.

    Science.gov (United States)

    Elías-Román, Rubén Damián; Medel-Ortiz, Rosario; Alvarado-Rosales, Dionicio; Hanna, John W; Ross-Davis, Amy L; Kim, Mee-Sook; Klopfenstein, Ned B

    2018-01-19

    Armillaria mexicana (Agaricales, Physalacriaceae) is described as a new species based on morphology, DNA sequence data, and phylogenetic analyses. It clearly differs from previously reported Armillaria species in North, Central, and South America. It is characterized by the absence of fibulae in the basidioma, abundant cheilocystidia, and ellipsoidal, hyaline basidiospores that are apparently smooth under light microscope, but slightly to moderately rugulose under scanning electron microscope. It is differentiated from other Armillaria species by macromorphological characters, including annulus structure, pileus and stipe coloration, and other structures. DNA sequence data (nuc rDNA internal transcribed spacers [ITS1-5.8S-ITS2 = ITS], 28S D-domain, 3' end of 28S intergenic spacer 1, and translation elongation factor 1-α [TEF1]) show that A. mexicana sequences are quite distinct from sequences of analogous Armillaria species in GenBank. In addition, sequences of ITS of the A. mexicana ex-type culture reveal an ITS1 of 1299 bp and an ITS2 of 582 bp, the longest ITS regions reported thus far in fungi. Phylogenetic analysis based on TEF1 sequences place A. mexicana in a well-separated, monophyletic clade basal to the polyphyletic A. mellea complex.

  14. Terms for describing new, advanced nuclear power plants

    International Nuclear Information System (INIS)

    1997-04-01

    The IAEA's Division of Nuclear Power and the Fuel Cycle (then the Division of Nuclear Power) took an initiative in this field some years ago when work was initiated in the area of ''safety related terms'' by its International Working Group on Advanced Technologies for Water Cooled Reactors. This activity drew on advice from reactor design organizations, research institutes and government organizations, and aimed at helping eliminate confusion and misuse of safety related terms in widespread use, clarifying technical thinking regarding these terms, and improving nuclear power acceptability by providing precisely described technical meanings to them. After discussion also in the International Working Groups for Gas Cooled Reactors and Fast Reactors, the work resulted in the publication in September 1991 of IAEA-TECDOC-626, entitled ''Safety Related Terms for Advanced Nuclear Plants'', which has become a widely used publication. The present TECDOC has been prepared using the same approach to obtain advice from involved parties. Drafts of this report have been reviewed by the International Working Groups on Water Cooled Reactors, Fast Reactors and Gas Cooled Reactors, as well as by the IAEA's International Fusion Research Council (IFRC). The comments and suggestions received have been evaluated and utilized for producing the present TECDOC. 3 figs

  15. Describing visual scenes: towards a neurolinguistics based on construction grammar.

    Science.gov (United States)

    Arbib, Michael A; Lee, Jinyong

    2008-08-15

    The present paper is part of a larger effort to locate the production and perception of language within the broader context of brain mechanisms for action and perception more generally. Here we model function in terms of the competition and cooperation of schemas. We use the task of describing visual scenes to explore the suitability of Construction Grammar as an appropriate framework for a schema-based linguistics. We recall the early VISIONS model of schema-based computer analysis of static visual scenes and then introduce SemRep as a graphical representation of dynamic visual scenes designed to support the generation of varied descriptions of episodes. We report preliminary results on implementing the production of sentences using Template Construction Grammar (TCG), a new form of construction grammar distinguished by its use of SemRep to express semantics. We summarize data on neural correlates relevant to future work on TCG within the context of neurolinguistics, and show how the relation between SemRep and TCG can serve as the basis for modeling language comprehension.

  16. The self-describing data sets file protocol and Toolkit

    International Nuclear Information System (INIS)

    Borland, M.; Emery, L.

    1995-01-01

    The Self-Describing Data Sets (SDDS) file protocol continues to be used extensively in commissioning the Advanced Photon Source (APS) accelerator complex. SDDS protocol has proved useful primarily due to the existence of the SDDS Toolkit, a growing set of about 60 generic commandline programs that read and/or write SDDS files. The SDDS Toolkit is also used extensively for simulation postprocessing, giving physicists a single environment for experiment and simulation. With the Toolkit, new SDDS data is displayed and subjected to complex processing without developing new programs. Data from EPICS, lab instruments, simulation, and other sources are easily integrated. Because the SDDS tools are commandline-based, data processing scripts are readily written using the user's preferred shell language. Since users work within a UNIX shell rather than an application-specific shell or GUI, they may add SDDS-compliant programs and scripts to their personal toolkits without restriction or complication. The SDDS Toolkit has been run under UNIX on SUN OS4, HP-UX, and LINUX. Application of SDDS to accelerator operation is being pursued using Tcl/Tk to provide a GUI

  17. DBH Prediction Using Allometry Described by Bivariate Copula Distribution

    Science.gov (United States)

    Xu, Q.; Hou, Z.; Li, B.; Greenberg, J. A.

    2017-12-01

    Forest biomass mapping based on single tree detection from the airborne laser scanning (ALS) usually depends on an allometric equation that relates diameter at breast height (DBH) with per-tree aboveground biomass. The incapability of the ALS technology in directly measuring DBH leads to the need to predict DBH with other ALS-measured tree-level structural parameters. A copula-based method is proposed in the study to predict DBH with the ALS-measured tree height and crown diameter using a dataset measured in the Lassen National Forest in California. Instead of exploring an explicit mathematical equation that explains the underlying relationship between DBH and other structural parameters, the copula-based prediction method utilizes the dependency between cumulative distributions of these variables, and solves the DBH based on an assumption that for a single tree, the cumulative probability of each structural parameter is identical. Results show that compared with the bench-marking least-square linear regression and the k-MSN imputation, the copula-based method obtains better accuracy in the DBH for the Lassen National Forest. To assess the generalization of the proposed method, prediction uncertainty is quantified using bootstrapping techniques that examine the variability of the RMSE of the predicted DBH. We find that the copula distribution is reliable in describing the allometric relationship between tree-level structural parameters, and it contributes to the reduction of prediction uncertainty.

  18. INCAS: an analytical model to describe displacement cascades

    International Nuclear Information System (INIS)

    Jumel, Stephanie; Claude Van-Duysen, Jean

    2004-01-01

    REVE (REactor for Virtual Experiments) is an international project aimed at developing tools to simulate neutron irradiation effects in Light Water Reactor materials (Fe, Ni or Zr-based alloys). One of the important steps of the project is to characterise the displacement cascades induced by neutrons. Accordingly, the Department of Material Studies of Electricite de France developed an analytical model based on the binary collision approximation. This model, called INCAS (INtegration of CAScades), was devised to be applied on pure elements; however, it can also be used on diluted alloys (reactor pressure vessel steels, etc.) or alloys composed of atoms with close atomic numbers (stainless steels, etc.). INCAS describes displacement cascades by taking into account the nuclear collisions and electronic interactions undergone by the moving atoms. In particular, it enables to determine the mean number of sub-cascades induced by a PKA (depending on its energy) as well as the mean energy dissipated in each of them. The experimental validation of INCAS requires a large effort and could not be carried out in the framework of the study. However, it was verified that INCAS results are in conformity with those obtained from other approaches. As a first application, INCAS was applied to determine the sub-cascade spectrum induced in iron by the neutron spectrum corresponding to the central channel of the High Flux Irradiation Reactor of Oak Ridge National Laboratory

  19. Male powerlifting performance described from the viewpoint of complex systems.

    Science.gov (United States)

    García-Manso, J M; Martín-González, J M; Da Silva-Grigoletto, M E; Vaamonde, D; Benito, P; Calderón, J

    2008-04-07

    This paper reflects on the factors that condition performance in powerlifting and proposes that the result-generating process is inadequately described by the allometric equations commonly used. We analysed the scores of 1812 lifters belonging to all body mass categories, and analysed the changes in the results achieved in each weight category and by each competitor. Current performance-predicting methods take into account biological variables, paying no heed to other competition features. Performance in male powerlifting (as in other strength sports) behaves as a self-organised system with non-linear interactions between its components. Thus, multiple internal and external elements must condition changes in a competitor's score, the most important being body mass, body size, the number of practitioners, and the concurrency of favourable factors in one individual. It was observed that each behaved in a specific form in the high level, according to the individuals' circumstances, which make up the main elements of the competitive system in every category. In powerlifting, official weight categories are generally organised in three different groups: light (125 kg) lifter categories, each one of them with specific allometric exponents. The exponent should be revised periodically, especially with regard to the internal dynamics of the category, and adjusted according to possible changes affecting competition.

  20. Using the MWC model to describe heterotropic interactions in hemoglobin

    Science.gov (United States)

    Rapp, Olga

    2017-01-01

    Hemoglobin is a classical model allosteric protein. Research on hemoglobin parallels the development of key cooperativity and allostery concepts, such as the ‘all-or-none’ Hill formalism, the stepwise Adair binding formulation and the concerted Monod-Wymann-Changuex (MWC) allosteric model. While it is clear that the MWC model adequately describes the cooperative binding of oxygen to hemoglobin, rationalizing the effects of H+, CO2 or organophosphate ligands on hemoglobin-oxygen saturation using the same model remains controversial. According to the MWC model, allosteric ligands exert their effect on protein function by modulating the quaternary conformational transition of the protein. However, data fitting analysis of hemoglobin oxygen saturation curves in the presence or absence of inhibitory ligands persistently revealed effects on both relative oxygen affinity (c) and conformational changes (L), elementary MWC parameters. The recent realization that data fitting analysis using the traditional MWC model equation may not provide reliable estimates for L and c thus calls for a re-examination of previous data using alternative fitting strategies. In the current manuscript, we present two simple strategies for obtaining reliable estimates for MWC mechanistic parameters of hemoglobin steady-state saturation curves in cases of both evolutionary and physiological variations. Our results suggest that the simple MWC model provides a reasonable description that can also account for heterotropic interactions in hemoglobin. The results, moreover, offer a general roadmap for successful data fitting analysis using the MWC model. PMID:28793329