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Sample records for approach n s

  1. RNS derivation of N-point disk amplitudes from the revisited S-matrix approach

    Energy Technology Data Exchange (ETDEWEB)

    Barreiro, Luiz Antonio, E-mail: luiz.a.barreiro@gmail.com [Departamento de Física, UNESP, Rio Claro, São Paulo (Brazil); Instituto de Matemática e Computação, Universidade Federal de Itajubá, Itajubá, Minas Gerais (Brazil); Medina, Ricardo, E-mail: rmedina50@gmail.com [Instituto de Matemática e Computação, Universidade Federal de Itajubá, Itajubá, Minas Gerais (Brazil)

    2014-09-15

    Recently, in [7] we proposed a revisited S-matrix approach to efficiently find the bosonic terms of the open superstring low energy effective lagrangian (OSLEEL). This approach allows to compute the α{sup ′N} terms of the OSLEEL using open superstring n-point amplitudes in which n is considerably lower than (N+2) (which is the order of the required amplitude to obtain those α{sup ′N} terms by means of the conventional S-matrix approach). In this work we use our revisited S-matrix approach to examine the structure of the scattering amplitudes, arriving at a closed form for them. This is a RNS derivation of the formula first found by Mafra, Schlotterer and Stieberger [21], using the pure spinor formalism. We have succeeded doing this for the 5, 6 and 7-point amplitudes. In order to achieve these results we have done a careful analysis of the kinematical structure of the amplitudes, finding as a by-product a purely kinematical derivation of the BCJ relations (for N=4,5,6 and 7). Also, following the spirit of the revisited S-matrix approach, we have found the α{sup ′} expansions for these amplitudes up to α{sup ′6} order in some cases, by only using the well known open superstring 4-point amplitude, cyclic symmetry and tree level unitarity: we have not needed to compute any numerical series or any integral involving polylogarithms, at any moment.

  2. RNS derivation of N-point disk amplitudes from the revisited S-matrix approach

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    Luiz Antonio Barreiro

    2014-09-01

    Full Text Available Recently, in [7] we proposed a revisited S-matrix approach to efficiently find the bosonic terms of the open superstring low energy effective lagrangian (OSLEEL. This approach allows to compute the α′N terms of the OSLEEL using open superstring n-point amplitudes in which n is considerably lower than (N+2 (which is the order of the required amplitude to obtain those α′N terms by means of the conventional S-matrix approach. In this work we use our revisited S-matrix approach to examine the structure of the scattering amplitudes, arriving at a closed form for them. This is a RNS derivation of the formula first found by Mafra, Schlotterer and Stieberger [21], using the pure spinor formalism. We have succeeded doing this for the 5, 6 and 7-point amplitudes. In order to achieve these results we have done a careful analysis of the kinematical structure of the amplitudes, finding as a by-product a purely kinematical derivation of the BCJ relations (for N=4,5,6 and 7. Also, following the spirit of the revisited S-matrix approach, we have found the α′ expansions for these amplitudes up to α′6 order in some cases, by only using the well known open superstring 4-point amplitude, cyclic symmetry and tree level unitarity: we have not needed to compute any numerical series or any integral involving polylogarithms, at any moment.

  3. RNS derivation of N-point disk amplitudes from the revisited S-matrix approach

    CERN Document Server

    Barreiro, Luiz Antonio

    2014-01-01

    In the past year, in arXiv:1208.6066 we proposed a revisited S-matrix approach to efficiently find the bosonic terms of the open superstring low energy effective lagrangian (OSLEEL). This approach allows to compute the ${\\alpha'}^N$ terms of the OSLEEL using open superstring $n$-point amplitudes in which $n$ is very much lower than $(N+2)$ (which is the order of the required amplitude to obtain those ${\\alpha'}^N$ terms by means of the conventional S-matrix approach). In this work we use our revisited S-matrix approach to examine the structure of the scattering amplitudes, arriving at a closed form for them. This is a RNS derivation of the formula first found by Mafra, Schlotterer and Stieberger in arXiv:1106.2645, using the Pure Spinor formalism. We have succeeded doing this for the 5, 6 and 7-point amplitudes. In order to achieve these results we have done a careful analysis of the kinematical structure of the amplitudes, finding as a by-product a purely kinematical derivation of the BCJ relations (for N=4,...

  4. Analysis Approach to Durability Based on Material Initial Fatigue Quality and S-N Curve

    Institute of Scientific and Technical Information of China (English)

    Yang Moucun; Nie Hong

    2007-01-01

    Based on probabilistic fracture mechanics approach, a new concept of material initial fatigue quality (MIFQ) is developed. Then,the relation between S-N curve and crack propagation curve is studied. From the study, a new durability analysis method is presented. In this method, S-N curve is used to determine crack growth rate under constant amplitude.loading and evaluate the effects of different factors on durability and then the structural durability is analyzed. The tests and analyses indicate that this method has lower dependence on testing, and higher accuracy, reliability and generality and is convenient for application.

  5. Soluble salt sources in medieval porous limestone sculptures: A multi-isotope (N, O, S) approach

    Energy Technology Data Exchange (ETDEWEB)

    Kloppmann, W., E-mail: w.kloppmann@brgm.fr [BRGM, Direction des Laboratoires, Unité Isotopes, BP 6009, F-45060 Orléans cedex 2 (France); Rolland, O., E-mail: olivierrolland@wanadoo.fr [Montlouis-sur-Loire (France); Proust, E.; Montech, A.T. [BRGM, Direction des Laboratoires, Unité Isotopes, BP 6009, F-45060 Orléans cedex 2 (France)

    2014-02-01

    The sources and mechanisms of soluble salt uptake by porous limestone and the associated degradation patterns were investigated for the life-sized 15th century “entombment of Christ” sculpture group located in Pont-à-Mousson, France, using a multi-isotope approach on sulphates (δ{sup 34}S and δ{sup 18}O) and nitrates (δ{sup 15}N and δ{sup 18}O). The sculpture group, near the border of the Moselle River, is within the potential reach of capillary rise from the alluvial aquifer. Chemical analyses show a vertical zonation of soluble salts with a predominance of sulphates in the lower parts of the statues where crumbling and blistering prevail, and higher concentrations of nitrates and chloride in the high parts affected by powdering and efflorescence. Isotope fingerprints of sulphates suggest a triple origin: (1) the lower parts are dominated by capillary rise of dissolved sulphate from the Moselle water with characteristic Keuper evaporite signatures that progressively decreases with height; (2) in the higher parts affected by powdering the impact of atmospheric sulphur becomes detectable; and (3) locally, plaster reparations impact the neighbouring limestone through dissolution and re-precipitation of gypsum. Nitrogen and oxygen isotopes suggest an organic origin of nitrates in all samples. N isotope signatures are compatible with those measured in the alluvial aquifer of the Moselle River further downstream. This indicates contamination by sewage or organic fertilisers. Significant isotopic contrasts are observed between the different degradation features depending on the height and suggest historical changes of nitrate sources. - Highlights: • We use S, N and O isotopes to distinguish salt sources in limestone sculptures. • Vertical zonation of degradation is linked to capillary rise and air pollution. • Sulphate salts in lower parts are derived from river/groundwater. • Sulphate salts in higher parts show signature of air pollution. • Nitrates

  6. Soluble salt sources in medieval porous limestone sculptures: a multi-isotope (N, O, S) approach.

    Science.gov (United States)

    Kloppmann, W; Rolland, O; Proust, E; Montech, A T

    2014-02-01

    The sources and mechanisms of soluble salt uptake by porous limestone and the associated degradation patterns were investigated for the life-sized 15th century "entombment of Christ" sculpture group located in Pont-à-Mousson, France, using a multi-isotope approach on sulphates (δ(34)S and δ(18)O) and nitrates (δ(15)N and δ(18)O). The sculpture group, near the border of the Moselle River, is within the potential reach of capillary rise from the alluvial aquifer. Chemical analyses show a vertical zonation of soluble salts with a predominance of sulphates in the lower parts of the statues where crumbling and blistering prevail, and higher concentrations of nitrates and chloride in the high parts affected by powdering and efflorescence. Isotope fingerprints of sulphates suggest a triple origin: (1) the lower parts are dominated by capillary rise of dissolved sulphate from the Moselle water with characteristic Keuper evaporite signatures that progressively decreases with height; (2) in the higher parts affected by powdering the impact of atmospheric sulphur becomes detectable; and (3) locally, plaster reparations impact the neighbouring limestone through dissolution and re-precipitation of gypsum. Nitrogen and oxygen isotopes suggest an organic origin of nitrates in all samples. N isotope signatures are compatible with those measured in the alluvial aquifer of the Moselle River further downstream. This indicates contamination by sewage or organic fertilisers. Significant isotopic contrasts are observed between the different degradation features depending on the height and suggest historical changes of nitrate sources. © 2013.

  7. FI-modules: a new approach to stability for S_n-representations

    CERN Document Server

    Church, Thomas; Farb, Benson

    2012-01-01

    In this paper we introduce and develop the theory of FI-modules. We apply this theory to obtain new theorems about: - the cohomology of the configuration space of n distinct ordered points on an arbitrary manifold - the diagonal coinvariant algebra on r sets of n variables - the cohomology and tautological ring of the moduli space of n-pointed curves - the space of polynomials on rank varieties of n x n matrices - the subalgebra of the cohomology of the genus n Torelli group generated by H^1 and more. The symmetric group S_n acts on each of these vector spaces. In most cases almost nothing is known about the characters of these representations, or even their dimensions. We prove that in each fixed degree the character is given, for n large enough, by a polynomial in the cycle-counting functions that is independent of n. In particular, the dimension is eventually a polynomial in n. FI-modules are a refinement of Church-Farb's theory of representation stability for representations of S_n. In this framework, a c...

  8. Modeling the phase behavior of H2S+n-alkane binary mixtures using the SAFT-VR+D approach.

    Science.gov (United States)

    dos Ramos, M Carolina; Goff, Kimberly D; Zhao, Honggang; McCabe, Clare

    2008-08-07

    A statistical associating fluid theory for potential of variable range has been recently developed to model dipolar fluids (SAFT-VR+D) [Zhao and McCabe, J. Chem. Phys. 2006, 125, 104504]. The SAFT-VR+D equation explicitly accounts for dipolar interactions and their effect on the thermodynamics and structure of a fluid by using the generalized mean spherical approximation (GMSA) to describe a reference fluid of dipolar square-well segments. In this work, we apply the SAFT-VR+D approach to real mixtures of dipolar fluids. In particular, we examine the high-pressure phase diagram of hydrogen sulfide+n-alkane binary mixtures. Hydrogen sulfide is modeled as an associating spherical molecule with four off-center sites to mimic hydrogen bonding and an embedded dipole moment (micro) to describe the polarity of H2S. The n-alkane molecules are modeled as spherical segments tangentially bonded together to form chains of length m, as in the original SAFT-VR approach. By using simple Lorentz-Berthelot combining rules, the theoretical predictions from the SAFT-VR+D equation are found to be in excellent overall agreement with experimental data. In particular, the theory is able to accurately describe the different types of phase behavior observed for these mixtures as the molecular weight of the alkane is varied: type III phase behavior, according to the scheme of classification by Scott and Konynenburg, for the H2S+methane system, type IIA (with the presence of azeotropy) for the H2S+ethane and+propane mixtures; and type I phase behavior for mixtures of H2S and longer n-alkanes up to n-decane. The theory is also able to predict in a qualitative manner the solubility of hydrogen sulfide in heavy n-alkanes.

  9. Effect Of Non-metal Elements (C, N, S) As Anionic Dopants On Electronic Structure Of Tio2-Anatase By Density-Functional Theory Approach

    OpenAIRE

    Hari Sutrisno

    2016-01-01

    This article is a theoritical approach to calculate the electronic structure of undoped- and non-metal anions doped-TiO2-anatase. The objective of the research is to calculate abinitio the band structure and the density of states (DOS) of undoped-, C-, N-, and S-doped TiO2-anatase. Kohn-Sham equations are performed with the density functional theory (DFT) using the local density approximation (LDA) for exchange-correlation functional. The first-principle calculations were done using supercell...

  10. Minimizing Drilling Thrust Force for HFRP Composite by Optimizing Process Parameters using Combination of ANOVA Approach and S/N Ratios Analysis

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    Maoinser Mohd Azuwan

    2014-07-01

    Full Text Available Drilling hybrid fiber reinforced polymer (HFRP composite is a novel approach in fiber reinforced polymer (FRP composite machining studies as this material combining two different fibers in a single matrix that resulted in considerable improvement in mechanical properties and cost saving as compared to conventional fiber composite material. This study presents the development and optimized way of drilling HFRP composite at various drilling parameters such as drill point angle, feed rate and cutting speed by using the full factorial design experiment with the combination of analysis of variance (ANOVA approach and signal to noise (S/N ratio analysis. The results identified optimum drilling parameters for drilling the HFRP composite using small drill point angle at low feed rate and medium cutting speed that resulted in lower thrust force.

  11. Microwave-Assisted Esterification of N-Acetyl-L-Phenylalanine Using Modified Mukaiyama’s Reagents: A New Approach Involving Ionic Liquids

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    Olarongbe Olubajo

    2008-01-01

    Full Text Available Inspired by the concept of ionic liquids (ILs, this study modified the original Mukaiyama’s reagent, 2-chloro-1-methylpyridinium iodide (m.p. 200-dec, from ionic solid into liquids by changing its anion. The esterification of N-acetyl-L-phenylalanine was investigated as a model reaction. The microwave irradiation was more effective in esterifying N-acetyl-L-phenylalanine than the conventional reflux method. The original Mukaiyama’s reagent was modified into ILs through manipulating its anion. However, only non-nucleophilic anions (such as EtSO4- and Tf2N- were favorable since nucleophilic ones (such as CF3COO- and CH3COO- could exchange with chlorine resulting in non-reactive coupling reagents. Two modified Mukaiyama’s compounds (i.e. hydrophilic [2- ClMePy][EtSO4] and hydrophobic [2-ClMePy][Tf2N] have been identified as the best ILtype coupling reagents. The esterification reaction was greatly enhanced by using 1- methylimidazole as the base instead of conventional toxic tertiary amines, and by using excess amount of alcohols as solvents instead of dichloromethane. Overall, the method reported is effective and ‘greener’.

  12. One-pot tandem Ugi-4CR/S(N)Ar approach to highly functionalized quino[2,3-b][1,5]benzoxazepines.

    Science.gov (United States)

    Ghandi, Mehdi; Zarezadeh, Nahid; Abbasi, Alireza

    2016-05-01

    We have developed a convenient and facile method for the synthesis of functionalized diverse quino[2,3-b][1,5]benzoxazepines. These new compounds were synthesized through a one-pot sequential Ugi-4CR/base-free intramolecular aromatic nucleophilic substitution (S(N)Ar) reaction in moderate to good yields from readily available starting materials. Structural confirmation of the products is confirmed by analytical data and X-ray crystallography.

  13. An investigation of the effects of rejected students’ classroom behaviours on the classroom atmosphere and teachers’ approach to these studentsReddedilen öğrencilerin sınıftaki davranışlarının, sınıf atmosferine etkilerinin ve bu öğrencilere yönelik öğretmen yaklaşımlarının incelenmesi

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    Ümit Çimen Çoşğun

    2016-10-01

    questions unrelated to the lesson, and making other people do homework for them, taking no responsibilities, trying to attract attention, teasing friends, being silent, using physical violence, violating the rules, sitting alone, sitting next to other students without permission, and scribbling on others’ homework. As for the teachers’ approach to these students, they used such techniques as ignoring, warning, giving responsibilities, rewarding/acknowledging, meeting one to one, talking with the parents more frequently than the techniques such as giving a break, tranquilizing, providing psychological counselling or directing to RAM. Findings show that teachers should be trained about the approaches and intervention methods for students who experience social rejection, and the schools should organize intervention programs for the students who are socially rejected.   Özet İnsanlar, sosyal kabulden hoşlanırken, sosyal reddedilmeyi sevmezler. Reddedilme yaşayan çocuklar için bu durum, günlük yaşamlarında olduğu kadar okul yaşamlarında da bir takım sorunlara yol açabilmektedir. Araştırmalar, arkadaşları tarafından reddedilen öğrencilerin sınıf içi istenmeyen davranışları daha çok sergileyebildiklerini göstermektedir. Sınıftaki öğrenme-öğretme sürecinin aksamaması bakımından öğretmenlerin sosyal reddedilme yaşayan öğrencilere yaklaşımları ve bu öğrencilerin gösterdikleri problem davranışlarla başa çıkma stratejileri oldukça önemlidir. Bu öğrencilere yönelik uygun müdahale yaklaşımlarının belirlenmesi için de öncelikle bu öğrencilerin tipik davranış biçimlerinin anlaşılması gerekmektedir. Bu çalışmanın amacı sosyal reddedilme yaşayan öğrencilerin sınıftaki genel davranışlarının, sınıf için istenmeyen davranışlarının, sınıf içi öğrenme-öğretme atmosferine etkilerinin ve öğretmenlerin bu öğrencilere yönelik kullandıkları yöntemlerin incelenmesidir. Nitel bir

  14. Andreev levels in anisotropic S-N-S junctions

    Energy Technology Data Exchange (ETDEWEB)

    Herrera, W.; Nino, V. [Universidad Nacional de Colombia, Bogota (Colombia). Dept. de Fisica

    2000-07-01

    In this work we investigate the effect of different symmetries of the pair potential on the quasiparticle energy levels in SNS superconducting weak links (S: superconductor, N: metal in the normal state). The energy levels are affected by the phase difference between the two superconducting regions. In particular we study the junctions S{sub s}-N-S{sub s}, S{sub s}-N-S{sub d} and S{sub d}-N-S{sub d}, where the subscripts mean s- and d-symmetry. We take into account the situations in which s is an isotropic, anisotropic or extended s-symmetry. (orig.)

  15. Holistic versus communicative approach in assessing oral production in English. . [Aproximación holística versus aproximación comunicativa en la evaluación de la producción oral en inglés].

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    Vivanco, Verónica

    2009-09-01

    Full Text Available The purpose of this article is to show the different communicative outputs in role-plays in two contrastive groups: students trained in integrative learning and students trained in communicative learning. The assessment of oral production carried out through a task-based approach to role-plays has shown that, even though communicative students master communicative techniques better than the integratively-taught group, the latter are more skilled in grammar. The students mean marking in the integrative group is not too far from the one obtained by the communicative group. We believe the reason for this is that integrative teaching fosters the use of linguistic skills which interact mutually. El propósito de este artículo es mostrar el rendimiento comunicativo en las simulaciones en inglés en dos grupos contrastivos: estudiantes adiestrados en enseñanza integrativa en contraste con los que están siguiendo un curso de enfoque comunicativo. La evaluación de la producción oral mediante una aproximación por tareas a las actividades de simulación muestra que, aunque los estudiantes siguiendo el método comunicativo dominan mejor tales técnicas, los estudiantes del método integrativo son más aventajados en el dominio de la gramática. Sin embargo, la nota media de los alumnos del método integral no se encuentra demasiado alejada de la de los que han seguido el método comunicativo. La razón parece radicar en que el método holístico fomenta el uso de habilidades lingüísticas que interactúan entre sí.

  16. Conflicto con la autoridad en los estudiantes de Trabajo Social: una aproximación experimental = Social assistance’s students: conflict with authority: an experimental approach

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    Hernán Carranza, Diego

    2009-01-01

    Full Text Available El presente artículo aborda los resultados obtenidos en un experimento llevado a cabo en el marco de la materia “Política Urbana, políticas de control social” de la carrera de Trabajo Social (UBA. Se trata de una situación hipotética en la que los estudiantes de Trabajo Social se encuentran obligados a responder a una consigna contraria a su identidad moral. De esta manera, se busca recrear las condiciones para observar y medir los niveles de obediencia de un grupo de estudiantes frente a las órdenes impartidas por el equipo de docentes a cargo. El interés que guía nuestra investigación consiste en identificar los repertorios de acción con los que dichos estudiantes enfrentan e intentan resolver un conflicto con una autoridad legítima, teniendo en cuenta tanto aquellas acciones que tienden hacia la desobediencia como las que facilitan la obediencia

  17. Abordaje transconjuntival más transcaruncular: amplia exposición de la pared medial orbitaria. Una alternativa al abordaje coronal Transconjunctival, transcaruncular approach: enlarged orbital medial wall exposure. An alternative to the coronal approach

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    J. Rodríguez

    2008-06-01

    Full Text Available Los pliegues nasolabiales prominentes son uno de los aspectos que más preocupan a los pacientes candidatos a un lifting facial, y han sido descritas muchas técnicas que intentan atenuar este signo distintivo del envejecimiento. Las sustancias de relleno tienen limitaciones inherentes. Las disecciones amplias del SMAS y su posterior suspensión no tienen efecto después de transcurridas 24 horas. La suspensión de la almohadilla grasa malar tiene un efecto que se extiende como máximo a los dos años de duración. La extirpación directa de la grasa lateralmente al surco nasolabial, aunque debe hacerse con mucha cautela, es la única técnica que proporciona resultados permanentes. Técnicamente, esta resección grasa se ha descrito realizada valiéndose de pinzas y tijeras, con cánulas de liposucción o con curetas. Este procedimiento requiere un control muy preciso, táctil y visual, de la localización y profundidad de la extirpación, control que puede mejorarse usando una gubia ósea con una mano para extirpar la grasa a eliminar de la dermis, mientras la otra mano maneja el colgajo cutáneo de la mejilla, para un control alternativo interno y externo del efecto escultural de la extirpación y para permitir una guía táctil externa.Prominent nasolabial folds are of concern to many face lift candidates. Many techniques have been described which tackle this distinct sign of ageing. Crease fillers have inherent limitations. Extended SMAS dissection and suspension has no effect after 24 hours. Malar fat pad suspension has an effect which extends maximally to 2 years. Direct fat excision lateral to the crease must be done cautiously. However, it is the only technique providing permanent results. Fat removal can be done with tweezers and scissors, with liposuction canules, and with curettes. Tactile and visual control over location and depth of the resection is required. Such is possible when using a bone rongeur in one hand to reduce the fat

  18. LOS DIARIOS ROJOS DE CARLOTA Y FLANAGAN. DOS APROXIMACIONES A LA EDUCACIÓN SEXUAL DESDE LA LITERATURA JUVENIL / CARLOTAS’S RED DIARIES AND FLANAGAN. TWO APPROACHES TO SEXUAL EDUCATION FROM YOUNG LITERATURE

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    Jaime Ibáñez Quintana

    2016-09-01

    Full Text Available Resumen En el presente trabajo analizaremos El Diario Rojo de Carlota y El Diario Rojo de Flanagan, dos libros que desde el ámbito de la Literatura Juvenil constituyen dos verdaderos y excelentes manuales de Educación Sexual para nuestros adolescentes. Ambas obras abordarán aspectos tan relevantes como la pubertad, la iniciación al sexo, la menstruación, los métodos anticonceptivos, las enfermedades de transmisión sexual, la respuesta sexual, los estereotipos masculinos y femeninos, la homosexualidad o la violencia de género, entre otros. Y lo harán con un enfoque didáctico, moderno y valiente, siempre próximo a la perspectiva, realidad y necesidades de los jóvenes. Abstract This study analyses Carlotas’s Red Diaries and Flanagan, two books that from the literature perspective, constitute two excellent sex education manuals for our teenagers. Both pieces deal with aspects so relevant as puberty, sex initiation, sex drive, contraceptives, sexually transmitted diseases, menstruation, feminine and masculine stereotypes, homosexuality and gender violence, among others. The books take a modern and didactic approach always from the youth’s perspective, reality and needs.

  19. APROXIMACIÓN DE LA MUSEOLOGÍA AL ENTORNO WEB. EXHIBICIÓN ONLINE DE LA COLECCIÓN DEL MNBA / Museological approach to web space. Online Exhibition of the MNBA´s Collection

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    Alejandra Gabriela Panozzo Zenere

    2015-12-01

    Full Text Available La presencia en Internet del Museo Nacional de Bellas Artes de Argentina no escapa a las innovaciones tecnológicas-comunicativas que transformaron en las últimas décadas la museología en general. En consecuencia, esta institución adoptó distintas especificidades dentro del entorno virtual para poder exponer su patrimonio artístico.En este trabajo, se intentará repasar de forma preliminar y exploratoria algunas construcciones que se evidencian dentro del diseño del sitio web y las prestaciones que permite el proyecto de Google, para luego, introducirnos en la función de exhibición online de sus obras de arte como imágenes pixeles.El rasgo que presenta este tipo de patrimonio nos acerca a una manera específica de exhibición de sus colecciones en el entorno virtual. El Consejo Internacional de Museos (ICOM considera que los museos deben velar para que sus exposiciones físicas y virtuales presenten información fehaciente, conforme a las misiones, políticas y finalidades declaradas por cada institución. Por tanto, el recorrido de este trabajo plantea como objetivo analizar las implicancias y de qué manera el MNBA expone su patrimonio de manera virtual a partir de su portal www.mnba.gob.ar y desde la experiencia Google art project.  AbstractThe online presence of the Argentine National Fine Arts Museum (MNBA cannot be conceived without considering the technological and communicative innovations that have transformed museum studies over the last decades. This institution has, therefore, adopted a number of specific virtual tools to display its art heritage.This work aims to revise in a preliminary and exploratory way some constructions within website design and the tools offered by Google Art Project, in order to then focus on the online display of works of art as series of pixels.The most distinctive features of this type of heritage lead us to a specific way of exhibiting art collections in the virtual space. The International

  20. Approaches to urban change through globalization, identity and ageing / Aproximaciones a las transformaciones urbanas a través de la globalización, identidad y envejecimiento

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    Diego Sánchez González

    2013-09-01

    Full Text Available Introduction to the theoretical and methodological studies on urban transformations from the perspective of globalization, identity and the aging population. Introducción a los estudios teóricos y metodológicos sobre las transformaciones urbanas desde el enfoque de la globalización, la identidad y el envejecimiento de la población.

  1. Abordaje intraoral en el síndrome de Eagle: Presentación de un caso clínico Intraoral approach in Eagle syndrome: A case report

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    Javier Mareque Bueno

    2011-12-01

    Full Text Available El síndrome de Eagle es una patología infrecuente secundaria a la elongación de la apófisis estiloides y/o calcificación del ligamento estilo-hioideo. La mayoría de pacientes afectados no presentan sintomatología, aunque la presión ejercida por esta estructura morfológicamente alterada contra estructuras vecinas puede desencadenar una gran variedad de síntomas, incluyendo dolor cervicofacial, sensación de cuerpo extraño en la orofaringe, aumento en la secreción salival, cefalea y dificultad para la deglución, el habla o los movimientos de la lengua. Presentamos el caso de una paciente de 50 años de edad con el síndrome de Eagle. La tomografía computerizada en haz de cono confirmó la sospecha clínica. Como tratamiento se realizó la resección parcial de ambas apófisis estiloides mediante un abordaje intraoral. La presentación clínica, el diagnóstico diferencial y el tratamiento se describen en este artículo.Eagle syndrome is a rare condition resulting from either the elongation of the temporal styloid process or calcification of the stylohyoid ligament. Most patients are asymptomatic, but when this structure presses against other parts of the head and neck it can originate a wide range of symptoms, including cervico-facial pain, foreign body sensation in oropharynx, increased saliva secretion, headache and difficulty with swallowing, speaking and neck or tongue movements. The case of a 50-year-old woman with Eagle syndrome is reported. Cone-beam computed tomography (CBCT confirmed the clinical suspicion. The intraoral approach was used for the partial resection of both styloid processes. The clinical presentation, diagnosis, management and differential diagnosis are described.

  2. Stress response in women mistreated by mate. An approach to its study Respuesta de estrés en la mujer maltratada en la relación de pareja. Una aproximación a su estudio

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    Addis Moya Ávila

    Full Text Available Background: Violence is a situation considered as a negative happening that causes an impact in the victim’s life, and alter his behavior and daily life, generating an equilibrium disturbance situation. Objective: To analize the stress response in women victims of violence in mate relationship. Method: An observational-analitic study was carried out of cases and controls. The sample was included 120 women; 40 cases and 80 controls, belonging to the Cienfuegos municipality in the year 2003. The variables used were: the cognitive valoration of the violent situation, the ways of confrontation, the locus control, the existence of familiar support, social support, and the influence on some health indicators. Results: It were statistically significant the differences in response to stress among the groups and its consecuences. Conclussions: Violence to women in mate relationship causes a high stress level, associated to confronting stiles directed to the emotions, these are interconnected to the external locus control and to the limitation of supportive perception, which are nocive to health.

    Fundamento: La violencia es una situación considerada como un acontecimiento negativo, que en mayor o menor medida, produce un impacto en la vida de la víctima y una ruptura en su comportamiento y modo de vida habitual, generando una situación de desequilibrio. Objetivo: Analizar la respuesta de estrés en mujeres víctimas de la violencia en la relación de pareja. Método: Se realizó un estudio analítico observacional de casos y controles. La muestra estuvo conformada por 120 mujeres, cuarenta casos y 80 controles, pertenecientes al municipio de Cienfuegos, en el año 2003. Las variables analizadas fueron: la valoración cognitiva de la situación violenta, los modos de afrontamientos, el locus

  3. Meta-avaliação: das abordagens às possibilidades de aplicação Metaevaluación: de los abordajes a las posibilidades de aplicación Metaevaluation: from approaches to possibilities of application

    Directory of Open Access Journals (Sweden)

    Ligia Gomes Elliot

    2011-12-01

    Full Text Available Dada a importância de seus resultados, projetos, programas e serviços dirigidos a diferentes segmentos da sociedade têm sido acompanhados por avaliações que buscam revelar se houve o alcance da desejada qualidade. No entanto, a condução adequada dessas avaliações pode ser posta em cheque, isto é, verificada por meio de meta-avaliações. Meta-avaliação foi definida como a avaliação de uma avaliação. Assim, o presente artigo apresenta algumas abordagens que representam a contribuição de diversos autores para a realização de meta-avaliações. São abordagens aplicáveis a meta-avaliações somativas e formativas. Algumas indicações de meta-avaliações já desenvolvidas fazem parte do artigo, que destaca as possibilidades de utilização da última versão publicada dos padrões internacionais de avaliação, do Joint Committee on Standards for Educational Evaluation.Dada la importancia de sus resultados, proyectos, programas y servicios dirigidos a diferentes segmentos de la sociedad han debido estar acompañados por evaluaciones que tratan de revelar si se alcanzó la calidad deseada. Aunque las metaevaluaciones han tenido una correcta conducción, ésta puede ser puesta en jaque, es decir, se puede verificar por medio de metaevaluaciones. Es bueno recordar que se definió la metaevaluación como la evaluación de una evaluación. Este artículo presenta algunos abordajes que representan la contribución de diversos autores para la realización de metaevaluaciones. Dichos abordajes se aplican a metaevaluaciones sumativas y formativas. Algunas indicaciones de las metaevaluaciones ya desarrolladas integran este artículo, que pone de relieve las posibilidades de utilización de la última versión publicada de los modelos internacionales de evaluación, del Joint Committee on Standards for Educational Evaluations.Given the importance of their results, projects, programs and services aimed at different segments of society

  4. León Felipe’s Poetics of Exodus: an Intertextual Approach to Español del éxodo y del llanto and Ganarás la luz

    Directory of Open Access Journals (Sweden)

    Simone Trecca

    2010-05-01

    Full Text Available In this study a path is suggested through some texts from two key works by León Felipe, written during his exile, Español del éxodo y del llanto and Ganarás la luz. The aim of this study is not only to show the evolution of topics, symbols, intertextual relationships and forms, from a historical perspective to another one which attempts to emphasize the ethic value of exile as an immanent human condition; in fact, it is also important to underline the presence of such evolution, in embryo, since the moment of primordial poetic creation. The way shown by León Felipe, especially by means of a thick intertextual texture, implies the transformation of the historical paradigm of exile into the poetical and ethical paradigm of exodus, as a sapiential way towards the light.

  5. Strange nucleon form factors: Solitonic approach to $G_{M}^{s}$, $G_{E}^{s}$, $\\tilde{G}_{A}^{p}$ and $\\tilde{G}_{A}^{n}$ and comparison with world data

    CERN Document Server

    Göke, K; Silva, A; Urbano, D; Goeke, Klaus; Kim, Hyun-Chul; Silva, Antonio; Urbano, Diana

    2006-01-01

    We summarize the results of the chiral quark-soliton model ($\\chi$QSM) concerning basically all form factors necessary to interpret the present data of the parity violating electron scattering experiments SAMPLE, HAPPEX, A4 and G0. The results particularly focus on the recently measured asymmetries and the detailed data for various combinations of $G_{M}^{s}$, $G_{E}^{s}$, $\\tilde{G}_{A}^{p}$ and $\\tilde{G}_{A}^{n}$ at $Q^2=0.1$ GeV$^2$. The calculations yield positive strange magnetic and electric form factors and a negative axial vector one, all being rather small. The results are very close to the combined experimental world data from parity violating electron scattering and elastic $\

  6. Mehmed Enisî Yalkı’nın Alman Ruhu Adlı Seyahatnamesine İmgebilimsel Bir Yaklaşım An Imagologist Approach To Mehmet Enisi Yalkı's Travelbook

    Directory of Open Access Journals (Sweden)

    Yılmaz DAŞCIOĞLU

    2012-12-01

    , Cumhuriyetle birlikte sistematik hale getirilen batı tipi Türk kimliğinin inşasında önemli bir görev üstlendiğini söylemek yanlış olmayacaktır. Bu çalışmada, II. Meşrutiyet’in ilanı ile birlikte büyük bir artış gösteren yurt dışı seyahatnamelerinden birisi imgebilimsel yöntemle incelenmektedir. Meşrutiyet dönemi isimlerinden gazeteci-yazar Mehmed Enisî Yalkı’nın, henüz Latin alfabesine aktarılmayan Alman Ruhu adlı seyahatnamesinde yeni bir ulusun, batı tipi Türk’ün inşası için teklif ettiği Alman/Almanya modeli çeşitli imgeler aracılığıyla çözümlenmektedir. Bütün bir seyahatname boyunca “Alman gibi çalış”, “Alman gibi metin ol”, “Alman gibi ruhunu kuvvetlendir”, “Alman gibi adalete hizmet et” nidalarının bir arka fon olarak çınlaması, Almanya’nın model alınmasının teklif edilmesinin açık işaretleridir. Çalışmanın sonunda, Tanzimat’tan Cumhuriyet’e kadar uzanan yeni bir ulusun inşası bunalımını yaşayan Osmanlı aydınının, seyahatnameyi bir edebi tür gibi kullanmaktan çok, toplumu eğitmek, ona yön vermek, ona alternatif yaşam ve kültür sunmak kaygısıyla kaleme aldığı tespit edilmektedir.

  7. 5S-menetelmän implementointi

    OpenAIRE

    Kaikula, Kari-Marko

    2017-01-01

    Tässä opinnäytetyössä tavoiteltiin siisteyden ja järjestyksen tuomista 5S-menetelmän avulla Helen Oy:n kunnossapidon varaosavarastoon Salmisaaren voimalaitoksella. Helen Oy on Helsingin kaupungin omistama energia-alan yritys. Kehittämistehtävänä työssä oli 5S-menetelmän implementointi. Tutkimuksen tarkoituksena oli tutkia niitä seikkoja, jotka vaikuttavat 5S-menetelmän käyttöönottoon. 5S on menetelmä, jolla tuodaan siisteyttä ja järjestystä työympäristöön. Tutkimusmenetelmänä oli toiminta...

  8. RELIGION IN FREUD’S APPROACH

    Directory of Open Access Journals (Sweden)

    Mukrimin Mukrimin

    2012-12-01

    Full Text Available This article aimed to examine the essence of religion by using Sigmund Freud’ psychoanalysis. It looks at the Freud’s theories: “the ontogenic” and “the phylogenenic”. The origins of religious and belief traditions, as Freud had mapped, are neurosis, precarious future, and religion’s masculine roots. Freud’s realist approach on religion brought a controversy on the study of religion, i.e., by associating his patients and order cultural phenomena (art, literature, and philosophy. His falsification over religion mad Freud as the most controversial man in his time. For Freud, the truth-value of religious doctrines does not lie within the scope of the present enquiry. It is enough for us, as Freud asserts that we have recognized them as being, in their psychological nature, illusions. Key Words: religion, Freud, philosophy, psycho-analysis.

  9. Equilibrium CH acidity of Ni(II) complexes of Schiff's bases of amino acids with S-2-N-(N'-benzylprolyl)amino-benzaldehyde and S-2-N-(N'-benzylprolyl)aminobenzophenone

    Energy Technology Data Exchange (ETDEWEB)

    Terekhova, M.I.; Belokon' , Yu.N.; Maleev, V.I.; Chernoglazova, N.I.; Kochetkov, K.A.; Belikov, V.M.; Petrov, E.S.

    1986-10-20

    By metal exchange in DMSO (K/sup +/ cation) pK values have been measured for a series of acids which are Ni(II) complexes of Schiff's bases of the amino acids Gly, S-Ala, and S-Val, with S-2-N-(N'-benzylprolyl)aminobenzaldehyde and S-2-N-(N'-benzylprolyl)aminobenzophenone. The amino acid fragment in the studied Ni(II) complexes possesses high acidity close to fluorene but five orders of magnitude greater than for acetophenone and approaching nitroalkanes in acidity.

  10. A PSYCHOANALYTIC APPROACH TO AFANASY FET’S WORK, “A DREAM” - AFANASİY FET’İN “RÜYA” ADLI ESERİNE PSİKANALİTİK YAKLAŞIM

    Directory of Open Access Journals (Sweden)

    Leyla KERİM

    2015-04-01

    Full Text Available The idea that literature and psychology which are based on human and the issues related to human in all their historical process should be scientifically explored from each other’s perspective was first suggested by Sigmund Freud. Freud used the literary works as materials to examine their writers and protagonists better; consequently, his approach is known as the psychoanalytic criticism since he examined writers’ and protagonists’ earlier lives, dreams and psychologies through these literary works. In this respect, Afanasy Fet’s work ,“A Dream” could be considered as a very interesting study theme. Fet, who is not as well-known as L. N. Tolstoy and F. M. Dostoyevsky in Turkey, is one of the poets that belong to the literary approach known as the “Clean Art” in 19.th century Russian literature. The poem named “A Dream” has a special place among A. Fet’s works because of its subject matter and its being one of the “clean art” works. The work is about Lieutenant Losev’s vision he dreamt. The reason for us to choose this work which provided a basis for our study is that dreams have big importance regarding psychology, and they are directly connected to sub conscience. Due to the psychoanalytic approach, the works examined can be understood better, and the hidden factors can emerge. We recognize two different sub consciences in this work that is analyzed with psychoanalytic approach: first, a protagonist who is narrating his dream and feelings (Lieutenant Losev and then Afanasy Fet whose feelings and psychology are reflected on the work. As a result of our analysis, we could say that Afanasy Fet reflected on Lieutenant Losev with regard to the deductions we get through the methods of psychoanalytic criticism. Since the methods of psychoanalytic criticism have not been given enough place in the studies on Russian Literature in Turkey, we believe that our study will be useful in this field.

  11. LA REPITENCIA ESCOLAR EN ESCUELAS PRIMARIAS DE SAN MIGUEL DE TUCUMÁN. UNA APROXIMACIÓN DESDE LAS REPRESENTACIONES SOCIALES Y LAS RELACIONES ENTRE DOCENTES Y ESTUDIANTES REPITENTES (GRADE REPETITION IN PRIMARY SCHOOLS OF SAN MIGUEL DE TUCUMÁN. AN APPROACH FROM TEACHER´S AND GRADE REPEATING PUPIL´S SOCIAL REPRESENTATIONS AND RELATIONSHIPS

    Directory of Open Access Journals (Sweden)

    Villalonga Penna María Micaela

    2011-04-01

    Full Text Available Resumen:Este artículo presenta resultados de investigación sobre las representaciones sociales de docentes y estudiantes repitentes acerca de la repitencia, y sus implicaciones en las relaciones entre estos actores educativos. La metodología utilizada fue de tipo cualitativo. Se realizaron entrevistas en profundidad a docentes y a estudiantes repitentes de primer grado, y observaciones participantes en escuelas de San Miguel de Tucumán. El análisis de los datos se efectuó acorde a la teoría fundamentada. Se identificaron categorías y temas en las entrevistas y observaciones participantes, y se triangularon los datos para elaborar una teoría explicativa del fenómeno. Los resultados mostraron que las representaciones docentes inciden en la conformación de las representaciones de los niños repitentes y en las relaciones áulicas. Las docentes, que definieron a la educación de manera unicausal, se manifestaron favorables a la repitencia. Los estudiantes repitentes se representaron negativamente a la repitencia y a los vínculos con docentes y pares. Las interacciones áulicas evidenciaron comunicaciones unidireccionales y una aplicación desigual de normas. Esto permitía a las docentes mantener una autoimagen satisfactoria, pero influía negativamente en la de los niños repitentes. Las docentes que consideraron a la educación como un proceso complejo, definieron a la repitencia como una situación desfavorable. Las representaciones de los alumnos repitentes sobre la repitencia y las relaciones con docentes y pares aunaron aspectos negativos y positivos. Las relaciones áulicas evidenciaron comunicaciones uni y multi-direccionales y una aplicación de normas más equitativa. La autoimagen de las docentes y de los niños repitentes contenía aspectos positivos y negativos.Abstract: This paper presents research results on teacher´s and grade repeating children’s representations of grade repetition, and its implications for the

  12. Assaying Vandevelde’s Approach to Gadamer

    Directory of Open Access Journals (Sweden)

    علیرضا آزادی

    2012-12-01

    Full Text Available The purpose of this paper is to look at four important aspects of Vandevelde’s criticisms of Gadamer. First is his position on Gadamer’s claim that his hermeneutics is a “philosophical hermeneutics” and not a methodology. Second is Vandevelde’s view of interpretation as necessarily going back to the author’s intention, and the status of the “mental state” of the author. Is it relevant to interpretation? Is it really accessible? Gadamer, because of his roots in Heidegger, offers a hermeneutics altogether free of intentionality. Third, while Vandevelde sees interpretation as an act of man, Gadamer sees understanding as an event that happens to the interpreter in which he or she participates. Finally, we shall consider the fundamentally different views of language in the two thinkers and the effect of this on their two views of interpretation. In this we find the basis for the many contrasts between the approaches of Vandevelde and Gadamer to interpretation

  13. Apprehending ganglioside diversity: a comprehensive methodological approach[S

    Science.gov (United States)

    Masson, Elodie A. Y.; Sibille, Estelle; Martine, Lucy; Chaux-Picquet, Fanny; Bretillon, Lionel; Berdeaux, Olivier

    2015-01-01

    Gangliosides (GGs) make a wide family of glycosphingolipids ubiquitously expressed in mammalian tissues and particularly abundant in the brain and nervous system. They exhibit a huge diversity due to structural variations in both their oligosaccharidic chain and ceramide moiety, which represent a real analytical challenge. Since their discovery in the 1940s, methods have persistently improved until the emergence of LC/MS, which offers a high level of specificity and sensitivity and is suitable with high-throughput profiling studies. We describe here a comprehensive approach relying on various techniques and aiming at fully characterizing GGs in biological samples. First, total GG content was determined by a biochemical assay. Second, GG class composition was assessed by high-performance thin-layer chromatography followed by colorimetric revelation. Then, ceramide types of GG classes were identified, and their relative quantification was performed thanks to the development of a powerful and reliable LC/MS method. Finally, ceramides were structurally characterized, and minor and less common GG classes were identified using high-resolution MS. These methods were applied to the rat retina to provide an exhaustive description of its GG composition, giving the base for a better understanding of the precise roles of GGs in this tissue. PMID:26142958

  14. TIEMPO Y RITUAL. UNA APROXIMACIÓN AL ANÁLISIS DE LAS REPRESENTACIONES DEL ORDEN EN LA SOCIEDAD COLONIAL(GOBERNACIÓN DEL TUCUMÁN, SIGLOS XVII Y XVIII / Time and ritual. An approach to the analysis of the order representation in colonial Tucumán´s society.

    Directory of Open Access Journals (Sweden)

    Silvina Smietniansky

    2010-12-01

    Full Text Available Este trabajo de carácter exploratorio constituye una primera aproximación al análisis de las experiencias y los sentidos del tiempo implicados en las representaciones del orden social, según lo han vivido y significado los vecinos y los funcionarios de gobierno en Indias durante el período colonial. Nos proponemos desarrollar un estudio comparativo de las  instituciones del cabildo y los juicios de residencia, basado en el examen de un conjunto de documentos  de gobierno y justicia relativos a la gobernación del Tucumán durante los siglos XVII y XVIII y organizado a partir de dos interrogantes centrales. Por un lado, interesa abordar cómo se configuraban  y articulaban dos experiencias del tiempo diversas -un tiempo local y cotidiano y, otro tiempo que denominamos regio y ritual-; y por otro lado, exploramos de qué manera el carácter tradicional y formalizado de las prácticas que los cabildantes y los participantes del juicio de residencia desarrollaban en los contextos institucionales, contribuía a construir una representación del orden social figurado de gran estabilidad y anclado en un tiempo de larga duración.Palabras clave: tiempo; ritual; cabildos; juicio de residencia; Tucumán colonialAbstractThis exploratory work constitutes an approach to the analysis of time experiences y meanings that were implies in social order representation according to the lives and perspectives of  the vecinos and government functionaries in Indias during the colonial period. We intend to develop a comparative study of the cabildo and juicio de residencia institutions, based on the exam of a set of government and justice documents relative to the Tucumán province during XVII and XVIII centuries, and organized upon to tow central questions. On one side, we are interested on how two different time experience –a local and ordinary time, and another time that we called regal and ritual- were configured and articulated; and on the other side, we

  15. ZnS:N and ZnS:N,Ag grown by molecular beam epitaxy

    Energy Technology Data Exchange (ETDEWEB)

    Ichino, K.; Kotani, A.; Tanaka, H.; Kawai, T. [Department of Information and Electronics, Tottori University, 4-101 Koyama-minami, Tottori 680-8552 (Japan)

    2010-06-15

    The N-doping conditions have been investigated in the growth of ZnS:N by molecular beam epitaxy using RF plasma of N{sub 2} gas. As a result, high growth temperatures are found to be suitable for the effective incorporation and the activation of N acceptors. The capacitance versus voltage data of the ZnS:N layers grown at around 350 C exhibit p-type behavior, while the undoped layers show an n-type characteristic due to residual donors. ZnS:N,Ag epitaxial layers were also grown to investigate the effect of Ag-co-doping. It is shown that the p-type behavior of the N-doped layers is enhanced by the Ag-co-doping. This suggests the formation of Ag-related complex centers compensating residual donors (copyright 2010 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

  16. N.F.S. Grundtvigs verden

    DEFF Research Database (Denmark)

    Heggem, Synnøve Sakura; Baunvig, Katrine Frøkjær; Korsgaard, Ove

    2011-01-01

    N.F.S. Grundtvig er en vidtfavnende historisk personlighed. I sit lange liv gennemgik han ikke blot en rivende personlig og tankemæssig udvikling, men han oplevede tillige en ydre verden med store forandringer. Omgivelsernes forandringer påvirkede ham voldsomt og inspirerede ham både til refleksion...

  17. Phylogenetic relationships of Chilean leptodactylids: a molecular approach based on mitochondrial genes 12S and 16S Relaciones filogenéticas de los leptodactílidos chilenos: una aproximación molecular basada en los genes mitocondriales 12S y 16S

    Directory of Open Access Journals (Sweden)

    CLAUDIO CORREA

    2006-12-01

    relationships recovered in this study suggest a multiple origin for Chilean temperate forest frogs and reveal an unexpected level of taxonomic diversity and evolutionary divergence among Chilean leptodactylidsLa mayoría de los anfibios chilenos pertenece a la subfamilia Telmatobiinae (Anura, Leptodactylidae. Varios estudios filogenéticos de Leptodactylidae y Telmatobiinae, basados principalmente en caracteres morfológicos, han sugerido implícitamente relaciones más estrechas de algunas especies de Telmatobiinae con miembros de otras subfamilias de leptodactílidos, incluyendo el género leptodactilino Pleurodema presente en Chile. Además, un número creciente de estudios moleculares sugieren un estatus no monofilético para Telmatobiinae, aunque ninguno de estos estudios ha investigado las relaciones filogenéticas de esta subfamilia. Secuencias parciales de los genes ribosomales mitocondriales 12S y 16S fueron comparadas para determinar las relaciones filogenéticas de los leptodactílidos chilenos y su posición dentro de los anuros modernos (Neobatrachia. Se incluyeron 22 especies de nueve de los diez géneros de telmatobinos presentes en Chile (Alsodes, Atelognathus, Batrachyla, Caudiverbera, Eupsophus, Hylorina, Insuetophrynus, Telmatobufo y Telmatobius, dos especies del género Pleurodema y una especie de Rhinodermatidae la cual es considerada una familia derivada de los leptodactílidos por algunos autores. Se incluyeron además 51 especies que representan la mayoría de las familias que componen Neobatrachia. Las reconstrucciones filogenéticas se realizaron utilizando los métodos de máxima parsimonia, máxima verosimilitud e inferencia bayesiana. Las topologías obtenidas en todos los análisis indican que Telmatobiinae es un ensamblaje polifilético, compuesto por especies que pertenecen a Hyloidea (la mayoría de los géneros y especies más relacionadas con taxa de Australasia (el clado Caudiverbera + Telmatobufo, definido como la tribu Calyptocephalellini

  18. Neil Young representation of Hernán Cortés: a critical approach from the knowledge sociology to a paradigmatic case of cognitive distortion / Hernán Cortés según Neil Young: una aproximación desde la sociología del conocimiento a un caso paradigmático de distorsión cognitiva

    Directory of Open Access Journals (Sweden)

    José Luis Palacios Gómez

    2007-10-01

    Full Text Available In this article we realize a critical approach to the good savage myth as a cognitive distortion, paradigmatically represented by a Neil Young´s musical composition on Hernan Cortez figure. We use as a tool to do that criticism some relevant contributions from philosophy, social psychology and sociology of knowledge, specially that one elaborated by P.L. Berger. It’s shown myth inconsistence and their ideological supports and utilities and we conclude that one of the main functions of sociology is to unmask both descriptions and explanations of social world.

  19. Log N-log S in inconclusive

    Science.gov (United States)

    Klebesadel, R. W.; Fenimore, E. E.; Laros, J.

    1983-01-01

    The log N-log S data acquired by the Pioneer Venus Orbiter Gamma Burst Detector (PVO) are presented and compared to similar data from the Soviet KONUS experiment. Although the PVO data are consistent with and suggestive of a -3/2 power law distribution, the results are not adequate at this state of observations to differentiate between a -3/2 and a -1 power law slope.

  20. Conceptualización psicoanalítica acerca del juego de los niños: Punto de partida para una investigación empírica en psicoterapia Psychoanalytical conceptual approach to children´s play: Initial step for an empirical research in psychotherapy

    Directory of Open Access Journals (Sweden)

    Ana M. Luzzi

    2009-12-01

    Full Text Available Este trabajo es una exploración del marco teórico de una investigación desarrollada mediante una beca UBACyT de maestría, cuyo propósito es efectuar un estudio descriptivo del juego de niños entre 6 y 8 años en el contexto de la psicoterapia psicoanalítica grupal y su potencial relación con la contención emocional de los padres. Objetivos: Delimitar el significado otorgado al juego de los niños en la obra de autores clásicos del psicoanálisis. Metodología: Se efectúa una investigación conceptual sobre el juego de los niños, en tanto actividad normal de su vida anímica y en el contexto de la psicoterapia psicoanalítica. Se rastrea el concepto en la obra de Sigmund Freud, punto de partida de teorizaciones posteriores de autores de la Escuela Inglesa de Psicoanálisis. Dentro de esta corriente, se enfatizan los aportes de Melanie Klein, pionera en el trabajo psicoanalítico con niños, y de Donald Winnicott, que enriquecen la conceptualización de la actividad lúdica. Resultados y Conclusión: Los diferentes modos de conceptuar la actividad lúdica de los niños por parte de los autores mencionados, influyó en el modo de concebir la clínica psicoanalítica con niños.The following paper is part of the theoretical frame of an investigation that is being developed by an UBACyT master scholarship, which purpose is to carry out a descriptive study of children´s play between six and eight years old in the context of the psychoanalytic psychotherapy group and its potential relationship with the capacity of emotional containment of parents. Aim: Specify the meaning given to children´s play in the work of classical psychoanalytical authors. Methodology: A conceptual research about children´s play is carried out, as a normal activity in their mind life and as a psychoanalytical psychotherapy activity. The concept has been searched throughout Sigmund Freud´s work, as the basic and first step of the following theoretical discoveries

  1. halcón v s . paloma

    Directory of Open Access Journals (Sweden)

    V. Polo

    2013-01-01

    Full Text Available Los modelos matemáticos, por su propiedad de síntesis de variables con efectos dominantes, pueden suponer una herramienta clave en la com-prensión y en la reformulación de nuevas hipótesis sobre el funcionamiento de los sistemas biológicos a muy diferentes escalas: desde la bioquímica celular hasta los complejos ecosistemas. A pesar de esto, no son pocas las reticencias a su empleo, debidas al no siempre fácil dialogo en el binomio matemáticas-biología. Pero los modelos solo deben entenderse como una aproximación, más o menos razonable, al mundo real del que parten y su empleo solo debería estar justificado cuando su uso trasciende al conocimiento del estudio experimental u observacional. El objetivo del presente trabajo es describir alguno de los pasos clave a la hora de ajustar diferentes modelos un mismo hecho biológico. El ejemplo se aplica al conocido dilema entre las conductas contrapuestas halcón vs. paloma, formulado por Maynard Smith. Primero, se ajustan cuatro modelos diferentes para reproducir la conducta en una población mixta de halcones y palomas que disputan por la propiedad de un recurso valioso. Segundo, se analizan la dinámica y el equilibrio evolutivamente estable en poblaciones dimórficas. Tercero, se discute el rango de validez de las soluciones y las limitaciones de esos modelos cuando se comparan con los con las poblaciones naturales.

  2. Iran’s Approach to Knowledge Translation

    OpenAIRE

    R Majdzadeh; S Nedjat; Fotouhi, A; H. Malekafzali

    2009-01-01

    "nKnowledge translation was created in response to the knowledge-do gap. With the growing number of research projects, utilization of research knowledge roused interest. One of its defects, which are seen more in developing countries, is the scarcity of recognized practical knowledge translation applications. The actions taken to strengthen knowledge translation can be classified into three categories of ‘push, pull and exchange'. In Iran, some of the interventions effecti...

  3. Industrial Policy: Japan’s Flexible Approach.

    Science.gov (United States)

    1982-06-23

    oversight of Bank operations. Changes in re- serve ratio requirements require Ministry concurrence. Discount rate policy and open market operations are...were even less significant. Open market operations by the Bank of Japan did not entail trading in any "open" market. Until 1972, the Bank’s activities

  4. THE EUROPEAN UNION’S BILATERAL APPROACH

    Directory of Open Access Journals (Sweden)

    Ludmila BORTA

    2014-12-01

    Full Text Available The EU is a world economic power and a major trading partner for most countries. All the time, this region has been interested and has acted towards a free and fair trade. The decrease and even the elimination of tariff and non-tariff barriers in the world trade are among the main objectives of the EU strategy for international trade. At the moment, the elusive outcome of the WTO Doha Round has led to the proliferation of bilateral trade agreements worldwide. Although the EU remains committed to further development of the multilateral trading system, however, the EU still has appealed also to the development of bilateral trade relations. The aim of this paper is to illustrate the current bilateral dimension of the common commercial policy of the EU. In conclusion, to describe this bilateral approach of the EU we are using one word, namely “diversity”.

  5. El diálogo como encuentro: Aproximaciones a la relación profesional de la salud-paciente The dialogue like encounter: approaches to health`s professional-patient relationship

    Directory of Open Access Journals (Sweden)

    Francisco Bohórquez G.

    2005-11-01

    Full Text Available El acto profesional de cuidar la salud se ha ido deteriorando en la medida que la comunicación con el paciente se restringe a encuentros cada vez más técnicos, distantes y fríos que esquivan el diálogo y privilegian la "información". Esto plantea un reto al personal de salud, particularmente, a las escuelas y facultades de ciencias de la salud. Hoy más que nunca, en un mundo que sucumbe en el conflicto y la intolerancia, resurge la necesidad de reconocer la enfermedad, más allá del mero hecho biológico, como hecho social y cultural; de volver a valorar el diálogo como estrategia que permite el encuentro, dando sentido a nuestra existencia y haciéndonos humanos en el acto de enfermar y de sanar.Health care is the central role of health’s professionals. In the health’s professional - patient relationships health care has left deteriorating in the measure that communication is restricted a more and more technical, distant and colds encounters that avoid the dialogue and they privilege the "information." This outlines a challenge to the health’s professional and to the health’s sciences schools. Today, more than ever, in a world that succumbs in the conflict and the intolerance, is necessary recognizing the human illness, beyond the mere biological fact, as social and cultural fact. In this way is necessary to value the dialogue, like the best form of interpersonal communicating, that it allows the encounter, at once to give sense to our existence and to become human of making sick again and of healing.

  6. Corrección de errores en comprensión lectora en inglés: Una instrucción teóricamente fundamentada basada en estrategias macroestructurales / Correction of reading comprehension errors in English: a theoretical-based instructional approach focused on macrostructural strategies

    Directory of Open Access Journals (Sweden)

    Ángela Gómez

    2013-01-01

    Full Text Available Resumen: Se presenta y valida un diseño instruccional basado en el modelo de comprensión de textos de Kintsch y Van Dijk que mejora sustancialmente la comprensión lectora en inglés y corrige muchos de los errores que los estudiantes universitarios cometen en tareas como la elaboración de resúmenes. Un grupo piloto sirvió para desarrollar las estrategias didácticas, diseñar los materiales y definir las categorías de análisis. Otro grupo de estudiantes se constituyó en el grupo de tratamiento. Tras la instrucción, los estudiantes mejoraron su comprensión lectora en inglés, corrigieron casi todos los errores de comprensión y se percibió un cambio de nivel de procesamiento.Abstract: We present and validate an instructional design based on Kintsch and Van Dijk’s model of text comprehension which is able to significantly improve reading comprehension in English, and correct many of the errors committed by university students in tasks such as summarization tasks. A pilot group of students was used to develop instructional strategies, to improve the materials and to define the categories for further analyses. Another group of students formed the treatment group. After the instruction, students improved their reading comprehension in English, corrected almost all the comprehension errors, and a change in the level of processing of information was observed.

  7. Unique Challenges Accompany Thick-Shell CdSe/nCdS (n > 10) Nanocrystal Synthesis

    Energy Technology Data Exchange (ETDEWEB)

    Guo, Y; Marchuk, K; Abraham, R; Sampat, S; Abraham, R.; Fang, N; Malko, AV; Vela, J

    2011-12-23

    Thick-shell CdSe/nCdS (n {ge} 10) nanocrystals were recently reported that show remarkably suppressed fluorescence intermittency or 'blinking' at the single-particle level as well as slow rates of Auger decay. Unfortunately, whereas CdSe/nCdS nanocrystal synthesis is well-developed up to n {le} 6 CdS monolayers (MLs), reproducible syntheses for n {ge} 10 MLs are less understood. Known procedures sometimes result in homogeneous CdS nucleation instead of heterogeneous, epitaxial CdS nucleation on CdSe, leading to broad and multimodal particle size distributions. Critically, obtained core/shell sizes are often below those desired. This article describes synthetic conditions specific to thick-shell growth (n {ge} 10 and n {ge} 20 MLs) on both small (sub2 nm) and large (>4.5 nm) CdSe cores. We find added secondary amine and low concentration of CdSe cores and molecular precursors give desired core/shell sizes. Amine-induced, partial etching of CdSe cores results in apparent shell-thicknesses slightly beyond those desired, especially for very-thick shells (n {ge} 20 MLs). Thermal ripening and fast precursor injection lead to undesired homogeneous CdS nucleation and incomplete shell growth. Core/shells derived from small CdSe (1.9 nm) have longer PL lifetimes and more pronounced blinking at single-particle level compared with those derived from large CdSe (4.7 nm). We expect our new synthetic approach will lead to a larger throughput of these materials, increasing their availability for fundamental studies and applications.

  8. Unified Approach for Estimating the Probabilistic Design S-N Curves of Three Commonly Used Fatigue Stress-Life Models%估计三种常用应力 -寿命模型概率设计 S-N曲线的统一方法

    Institute of Scientific and Technical Information of China (English)

    赵永翔; 高庆; 王金诺

    2001-01-01

    提出了适于三参数、 Langer和 Basquin三种常用应力 -寿命模型称为广义极大似然法的估计概率设计 S-N曲线及其置信限的统一方法。方法将概率设计 S-N曲线表示为对数疲劳寿命均值和均方差曲线的广义形式。与现有常规和经典极大似然法方法不同,考虑所有试验数据的统计特征,应用最小二乘法先估计出均值曲线中的材料常数,然后利用极大似然原理和数学规划法估计出均方差曲线中的材料常数。有效性采用拟合相关系数、拟合误差均方值和置信限综合评价。对反应堆不锈钢管道焊接头虚拟应力幅 -裂纹萌生寿命数据及 45#碳钢成组法和极大似然法疲劳试验应力 -寿命数据的分析说明了方法的有效性。一般来说,三参数模型的拟合效果最好, Langer模型次之, Basquin模型最差。本文方法的拟合效果好于现有方法,并尽量避免了现有方法受试验数据局部统计特征影响而可能给出偏于非安全估计的缺陷。%A unified approach,referred to as general maximum likelihood method,is presented for estimating probabilistic design S-N curves and their confidence bounds of the three commonly used fatigue stress-life models,namely three parameter,Langer and Basquin.The curves are described by a general form of mean and standard deviation S-N curves of the logarithm of fatigue life.Different from existent methods,i.e.,the conventional method and the classical maximum likelihood method,present approach considers the statistical characteristics of whole test data.The parameters of the mean curve is firstly estimated by least square method and then,the parameters of the standard deviation curve is evaluated by mathematical programming method to be agreement with the maximum likelihood principle.Fit effects of the curves are assessed by fitted relation coefficient,total fitted standard error and the confidence bounds.Application to the

  9. Molecular Approaches to Understanding C & N Dynamics in MArine Sediments

    Energy Technology Data Exchange (ETDEWEB)

    Arturo Massol; James Tiedje; Jizhong Zhou; Allan Devol

    2007-05-16

    Continental margin sediments constitute only about 10% of the total sediment surface area in the world’s oceans, nevertheless they are the dominant sites of nitrogen (N) cycling. Recent studies suggest that the oceanic nitrogen budget is unbalanced, primarily due to a higher nitrogen removal rate in contrast to the fixation rate, and it has been suggested that denitrification activity contributes significantly to this imbalance. Although denitrification in marine environments has been studied intensively at the process level, little is known about the species abundance, composition, distribution, and functional differences of the denitrifying population. Understanding the diversity of microbial populations in marine environments, their responses to various environmental factors such as NO3-, and how this impact the rate of denitrification is critical to predict global N dynamics. Environmental Microbiology has the prompt to study the influence of each microbial population on a biogeochemical process within a given ecosystem. Culture-dependent and –independent techniques using nucleic acid probes can access the identity and activity of cultured and uncultured microorganisms. Nucleic acid probes can target distintict genes which set phylogenetic relationships, such as rDNA 16S, DNA gyrase (gyrB) and RNA polymerase sigma 70 factor (rpoD). In the other hand, the genetic capabilities and their expression could be tracked using probes that target several functional genes, such as nirS, nirK, nosZ, and nifH, which are genes involved in denitrification. Selective detection of cells actively expressing functional genes within a community using In Situ Reverse Transcription-PCR (ISRT-PCR) could become a powerful culture-independent technique in microbial ecology. Here we describe an approach to study the expression of nirS genes in denitrifying bacteria. Pure cultures of Pseudomonas stutzeri and Paracoccus denitrificans, as well as co-cultures with non

  10. Okul öncesi ve sınıf öğretmenliği öğrencilerinin öğrenme yaklaşımlarının incelenmesi / Analysis of approaches to learning of students in preschool and primary school teaching departments

    Directory of Open Access Journals (Sweden)

    Ceyhun OZAN

    2012-12-01

    Full Text Available ÖZETBu çalışmanın amacı, okul öncesi ve sınıf öğretmenliği öğrencilerinin öğrenme yaklaşımlarını tercih etme düzeylerini ve tercih düzeylerinin bölüm, cinsiyet ve sınıf düzeyi değişkenleri açısından anlamlı farklılık gösterip göstermediğini belirlemektir. Araştırma tarama modelinde bir çalışmadır. Araştırmanın evreni, 2011-2012 eğitim-öğretim yılı, bahar yarıyılında, Atatürk Üniversitesi, Kazım Karabekir Eğitim Fakültesi, Okul Öncesi Öğretmenliği ve Sınıf Öğretmenliği Programlarında öğrenim gören toplam 854 öğrenciden oluşmaktadır. Araştırmanın örneklemi ise evren içerisinden basit seçkisiz örnekleme yöntemiyle seçilen 330 kişiden oluşmaktadır. Verilerin elde edilmesinde Öğrenme Yaklaşımları ve Çalışma Becerileri Ölçeği kullanılmıştır. Araştırmanın sonuçlarına göre üç öğrenme yaklaşımı da yüz üzerinden altmış ortalamanın üstünde tercih edilmektedir. Okul öncesi ve sınıf öğretmenliği öğrencilerinin öğrenme yaklaşımları tercihleri arasında anlamlı farklılık yoktur. Cinsiyet değişkenine göre ise sadece yüzeysel öğrenme yaklaşımında anlamlı farklılık vardır. Yüzeysel öğrenme yaklaşımını erkek öğrenciler kız öğrencilere göre anlamlı ölçüde daha çok tercih etmişlerdir. Sınıf düzeyi değişkenine göre de sadece yüzeysel öğrenme yaklaşımında anlamlı farklılık vardır.

  11. On deformations of AdS{sub n}×S{sup n} supercosets

    Energy Technology Data Exchange (ETDEWEB)

    Hoare, B. [Institut für Physik, Humboldt-Universität zu Berlin,Newtonstrasse 15, D-12489 Berlin (Germany); Roiban, R. [Department of Physics, The Pennsylvania State University,University Park, PA 16802 (United States); Tseytlin, A.A. [The Blackett Laboratory, Imperial College,London SW7 2AZ (United Kingdom)

    2014-06-03

    We study the deformed AdS{sub 5}×S{sup 5} supercoset model of arXiv:1309.5850 which depends on one parameter ϰ and has classical quantum group symmetry. We confirm the conjecture that in the “maximal” deformation limit, ϰ→∞, this model is T-dual to “flipped” double Wick rotation of the target space AdS{sub 5}×S{sup 5}, i.e. dS{sub 5}×H{sup 5} space supported by an imaginary 5-form flux. In the imaginary deformation limit, ϰ→i, the corresponding target space metric is of a pp-wave type and thus the resulting light-cone gauge S-matrix becomes relativistically invariant. Omitting non-unitary contributions of imaginary WZ terms, we find that this tree-level S-matrix is equivalent to that of the generalized sine-Gordon model representing the Pohlmeyer reduction of the undeformed AdS{sub 5}×S{sup 5} superstring model. We also study in some detail similar deformations of the AdS{sub 3}×S{sup 3} and AdS{sub 2}×S{sup 2} supercosets. The bosonic part of the deformed AdS{sub 3}×S{sup 3} model happens to be equivalent to the symmetric case of the sum of the Fateev integrable deformation of the SL(2) and SU(2) principal chiral models, while in the AdS{sub 2}×S{sup 2} case the role of the Fateev model is played by the 2d “sausage” model. The ϰ=i limits are again directly related to the Pohlmeyer reductions of the corresponding AdS{sub n}×S{sup n} supercosets: (2,2) super sine-Gordon model and its complex sine-Gordon analog. We also discuss possible deformations of AdS{sub 3}×S{sup 3} with more than one parameter.

  12. Collectivity of Cr Isotopes Approaching N = 40

    Science.gov (United States)

    Baugher, T.; Gade, A.; Bazin, D.; Cook, J. M.; Dinca, D.-C.; Glasmacher, T.; Mueller, W. F.; Ratkiewicz, A.; Weisshaar, D.; McDaniel, S.; Grinyer, G.; Walsh, K.; Janssens, R. V. F.; Carpenter, M. P.; Kondev, F. G.; Zhu, S.; Stefanescu, I.; Ricard-McCutchan, E.; Freeman, S.; Deacon, A.; Smith, J. F.; Kay, B.; Sharp, D.

    2011-10-01

    The reduced quadrupole transition probability, B(E2;0+ -->2+), provides a way to quantify low-lying collectivity in even-even nuclei. B(E2) values for 58 , 60 , 62Cr were extracted using intermediate-energy Coulomb excitation at the NSCL. Cocktail beams containing 58 , 60 , 62Cr were produced in-flight and guided onto a high- Z target. De-excitation gamma-rays tagging the inelastic process were detected in coincidence with the scattered particles using the high-purity germanium array SeGA and the S800 spectrograph. The measurement allowed the B(E2) values of 60,62Cr to be extracted for the first time. Results are compared to large-scale shell-model calculations using a recent effective interaction developed for this region. This work was funded by the NSF under contract PHY-0606007; by the US DOE, ONP, under contracts DE- AC02-06CH11357 and DE-FG02-08ER41556 and by the UK Science and Technology Facilities Council (STFC).

  13. The one-loop worldsheet S-matrix for the AdS n × S n × T 10-2 n superstring

    Science.gov (United States)

    Roiban, Radu; Sundin, Per; Tseytlin, Arkady; Wulff, Linus

    2014-08-01

    We compute the massive-sector worldsheet S-matrix for superstring theories in AdS n × S n × T 10-2 n (with n = 2 , 3 , 5) in the near BMN expansion up to one-loop order in inverse string tension. We show that, after taking into account the wave function renormalization, the one-loop S-matrix is UV finite. In an appropriate regularization scheme the S-matrix is consistent with the underlying symmetries of the superstring theory, i.e. for the n=3 ,5casesitcoincideswiththeoneimpliedbythelight-conegaugesymmetrieswiththe dressing phases determined from the crossing equations. For the n = 2 , 3 cases we observe that the massless modes decouple from the one-loop calculation of massive mode scattering, i.e. the 2 n-dimensional supercoset sigma model and the full 10-dimensional superstring happen to have the same massive one-loop S-matrix.

  14. Theoretical approaches to low energy $\\bar{K}N$ interactions

    CERN Document Server

    Cieply, Ales

    2016-01-01

    We provide a direct comparison of modern theoretical approaches based on the SU(3) chiral dynamics and describing the low energy $\\bar{K}N$ data. The model predictions for the $\\bar{K}N$ amplitudes and pole content of the models are discussed.

  15. TITLE: León Felipe’s Poetics of Exodus: an Intertextual Approach to Español del éxodo y del llanto and Ganarás la luz. TÍTULO: La poética del éxodo de León Felipe: una lectura intertextual de Español del éxodo y del llanto y Ganarás la luz

    Directory of Open Access Journals (Sweden)

    Simone Trecca

    2010-05-01

    Full Text Available ABSTRACT: In this study a path is suggested through some texts from two key works by León Felipe, written during his exile, "Español del éxodo y del llanto" and "Ganarás la luz". The aim of this study is not only to show the evolution of topics, symbols, intertextual relationships and forms, from a historical perspective to another one which attempts to emphasize the ethic value of exile as an immanent human condition; in fact, it is also important to underline the presence of such evolution, in embryo, since the moment of primordial poetic creation. The way shown by León Felipe, especially by means of a thick intertextual texture, implies the transformation of the historical paradigm of exile into the poetical and ethical paradigm of exodus, as a sapiential way towards the light.. RESUMEN: En el presente trabajo se propone un recorrido a través de algunos textos de dos obras fundamentales de León Felipe escritas durante su exilio, "Español del éxodo y del llanto" y "Ganarás la luz". La finalidad del estudio es mostrar no sólo la evolución de temas, símbolos, relaciones intertextuales y formas a partir de un enfoque histórico hacia otro que intente poner de relieve el valor ético del exilio como condición humana inmanente; también se quiere subrayar la presencia de tal evolución, en germen, ya desde el momento de la creación poética primigenia. El camino que indica León Felipe, sobre todo mediante una densa red de relaciones intertextuales, supone la transformación del paradigma histórico del exilio republicano en el paradigma poético y ético del éxodo como camino sapiencial hacia la luz.

  16. N-Algebraic Structures and S-N-Algebraic Structures

    CERN Document Server

    Kandasamy, W B V; Smarandache, Florentin

    2006-01-01

    For the first time, we have introduced the concept of N-groups, N-semigroups, N-loops, and N-groupoids. We also define a mixed N-algebraic structure. The main aim of this book is to attract young mathematicians to this interesting field. It contains more than 200 new definitions. These concepts find applications in fields like finite automaton, coloring problems and coding theory.

  17. Dolores de cabeza, síntomas y enfermedad: un abordaje social sobre la construcción clínica de la migraña Headaches, symptoms and disease: a social approach to clinical construction of migraine

    Directory of Open Access Journals (Sweden)

    Romina Del Monaco

    2012-11-01

    Full Text Available El interés de este trabajo es, desde una perspectiva socioantropológica, analizar cómo el saber biomédico construye el diagnóstico de la migrana. El análisis que se presenta surge de una investigacións amplia sobre vida cotidiana, percepciones y experiencias de personas con esta dolencia crónica. Se realizaron entrevistas semiestructuradas y en profundidad a profesionales y pacientes en un hospital público de la Ciudad de Buenos Aires. Este artículo propone que son los relatos de las experiencias corporales y emocionales de las personas con migrana los que construyen esta categoría como diagnóstico médico. En este sentido, se analiza el lugar central que ocupan los síntomas (dolor de cabeza, vómitos, entre otros, no sólo como indicadores subjetivos sino también como único aspecto que se tiene en cuenta para el diagnóstico y tratamiento. De esta forma, la falta de evidencia fáctica de la migrana desde el saber médico hace que aspectos del diagnóstico y tratamiento se orienten al síntoma. Se observa un proceso por medio del cual los dolores de cabeza terminan convirtiéndose en la enfermedad misma.In this article, I analyze how migraine's diagnosis, as a chronic disease, is constructed by biomedicine. During the year 2010 I interviewed neurologist and patients from a public hospital in Buenos Aires City. There are two things that difference migraine from other chronic diseases: there is no factual evidence of migraine's existence and it does not has a certain etiology and efficient treatment. So, from a socio-anthropological perspective this research tries to analyze how neurologists construct and legitimize this pain as a real disease even though, according biomedicine's paradigm, there is no factual evidence of it. This article argues that migraine as a medical disease depends on physical and emotional experiences, perceptions and words of people with a special kind of headaches. In that sense, not only symptoms

  18. Preparation of N, N, N-trimethyl chitosan via a novel approach using dimethyl carbonate.

    Science.gov (United States)

    Wu, Meiyan; Long, Zhu; Xiao, Huining; Dong, Cuihua

    2017-08-01

    N,N,N-trimehtyl chitosan (TMC) is a water-soluble derivate of chitosan, which has been widely used as a biomedical material due to its excellent biocompatibility, biodegradability and bacterial properties. To date, TMC can only be prepared by the quaternization of chitosan using alkyl halide or dimethyl sulfate. However, alkyl halide and dimethyl sulfate are highly toxic, cancerigenic for humans, and harmful to the environment. This paper puts forward a novel approach to preparing TMC using dimethyl carbonate as a methylation reagent in an ionic liquid. The as-synthesized O-methyl-free TMC was characterized using NMR, FTIR, XRD and TG analyses. The results showed that TMC with a degree of quaternization of 9.11% was successfully obtained and the crystallinity of chitosan decreased with the increasing degree of N-methylation, the thermal stability of TMC was lower than that of chitosan. Furthermore, the effects of the dose of ionic liquid and dimethyl carbonate were disscussed. Copyright © 2017. Published by Elsevier Ltd.

  19. Carlsberg ja Heineken kangutavad S&N-i / Tõnis Arnover

    Index Scriptorium Estoniae

    Arnover, Tõnis, 1952-

    2007-01-01

    Scottish & Newcastle (S&N) lükkas Carlsbergi ja Heinekeni ostupakkumise tagasi. S&N väitel rikkus Carlsberg talle vaenulikku ostupakkumist tehes poolte partnerluslepet. Carlsbergi ja Heinekeni plaanidest S&N-i jagamisel. Lisad: Väikeriikide firmad peremehetsevad; Magus suutäis BBH

  20. Carlsberg ja Heineken kangutavad S&N-i / Tõnis Arnover

    Index Scriptorium Estoniae

    Arnover, Tõnis, 1952-

    2007-01-01

    Scottish & Newcastle (S&N) lükkas Carlsbergi ja Heinekeni ostupakkumise tagasi. S&N väitel rikkus Carlsberg talle vaenulikku ostupakkumist tehes poolte partnerluslepet. Carlsbergi ja Heinekeni plaanidest S&N-i jagamisel. Lisad: Väikeriikide firmad peremehetsevad; Magus suutäis BBH

  1. Sean-nós, Sean-nua... Sean-nós Nua?

    DEFF Research Database (Denmark)

    Sørensen, Bent

    2016-01-01

    This article examines the dynamics between old and new ways in Irish music, using terms from Pierre Bourdieu’s sociology of the fields of cultural production, such as position taking, gatekeeping and consecration. The traditional unaccompanied song in Gaelic nowadays known as sean-nós, or the old...... style, is not the most commercially viable type of music in an age with little patience for longish laments without vibrant beats or obscene lyrics. What then might be the sean-nua, or new style that is more befitting for today’s audience? Paradoxically the answer might lie in looking backward while...... at the same time looking forward to create a hybrid, glocal sean-nós-nua. Some of Ireland’s biggest names in contemporary popular music have been enamoured of the idea of crossing old with new, creating a hybrid form that would at once contain the wisdom of the old style and yet yield some authority...

  2. Optimización de procesos educativos en el E.E.E.S.

    OpenAIRE

    José Luis GONZÁLEZ GERALDO

    2009-01-01

    La presente investigación pretende relacionar el marco teórico de enfoques de aprendizaje, más conocido por sus siglas inglesas: SAL (Student Approaches to Learning) con la incipiente y candente creación del EEES (Espacio Europeo de Educación Superior) derivado de la no menos polémica Declaración de Bolonia. Todo ello con profesores, pero sobre todo estudiantes, como población muestral. A través de los siguientes apartados podremos observar, desde un prisma justificado, qué relación exist...

  3. Optimización de procesos educativos en el E.E.E.S.

    OpenAIRE

    José Luis GONZÁLEZ GERALDO

    2016-01-01

    La presente investigación pretende relacionar el marco teórico de enfoques de aprendizaje, más conocido por sus siglas inglesas: SAL (Student Approaches to Learning) con la incipiente y candente creación del EEES (Espacio Europeo de Educación Superior) derivado de la no menos polémica Declaración de Bolonia. Todo ello con profesores, pero sobre todo estudiantes, como población muestral. A través de los siguientes apartados podremos observar, desde un prisma justificado, qué relación exist...

  4. Multiple scattering and N-body approaches to nuclear reactions

    Energy Technology Data Exchange (ETDEWEB)

    Picklesimer, A.; Tandy, P.C.; Thaler, R.M.

    1983-02-01

    The relationship between conventional multiple scattering approaches and the recently developed N-body approaches to nuclear reactions is considered with a view towards elastic scattering applications. Connectivity expansions in the N-body approach and multiple scattering expansions in the Watson approach are developed by a common technique so that a comparison of the physical content of each can be made. In the N-body case this leads to a new derivation of the equations of Bencze, Redish, and Sloan in both particle-labelled and partition-labelled form and this yields new insight into minimal dimensionality of these equations and into the role of channel coupling schemes within this formulation. The relative simplicity and generality with which these results are obtained is designed to be easily understood by those unfamiliar with N-body formalisms. The two approaches are contrasted first for the three-particle problem and subsequently for the many-body problem. We argue that a strict adherence to the connected-kernel property which is advantageous for the three-particle problem may not be so advantageous for the many-body elastic scattering problem. Undesirable physical characteristics of the connectivity expansion for elastic scattering are identified and their rectification is discussed. The off-shell transformation associated with the N-body approach is examined critically. The origin of the multiplicity of N-body coupling schemes is elucidated. It is shown that a modified concept of connectivity, called inclusive connectivity, can be introduced to guide expansions which can be truncated in a physically meaningful way. The inclusive connectivity expansion is seen to be identical to the spectator expansion for an elementary projectile but differs in the case of a composite projectile.

  5. SATIŞ LİDERİ’NİN DURUMSAL YAKLAŞIM TEMELİNDE KENDİNİ DEĞERLENDİRME ÖLÇEĞİ-SALES LEADER’S SELF-ASSESSMENT MEASUREMENT BASED ON SITUATIONAL APPROACH

    Directory of Open Access Journals (Sweden)

    Mehmet ALİKİŞİOĞLU

    2010-01-01

    Full Text Available Liderlik ve satış liderliği kavramı ve psikolog sosyolog pazarlama ve satış ve yönetim alanında çalışana bilim insanları tarafından uzun zamandan beri üzerinde durulan bir konudur. Bu alanda yapılan çalışmalara baktığımızda 1920’li yılların başından beri liderliğin ne olduğuna açıklık getirmeye çalışan birçok çalışmaya rastlarız. Bu alanda yapılan araştırmalarla liderlik konusundaki karmaşıklıklar, açıklık kazanmaya başlamıştır. Aynı durum satış yönetimi alanında da görülmektedir.. Bir satış liderinin yaptığı davranışının diğer satış elemanlarını etkileme gücü lider ile yakından ilgilidir. Burada önerilen ölçeğin açıklanmasına dönük çalışmamızın amacı: Satış liderinin olası durumsal tutumlarıyla ilgilidir. Çalışmamızda satış liderinin yapabileceği dört ayrı temel davranış tercihi belirlenmiştir. Bunlar: Söyleme, bizzat yapma, katılma ve yetkilendirmedir. Satış liderinin, dört ayrı davranışı ile ilgili ölçekte, on altı farklı durumda liderin tercihlerine bağlı olarak, kendi kendini nasıl değerlendirebileceğini açıklanmaya çalışılmıştır.-The concept of leadership and sales leadership has been taken great attention by academicians. In the process of time, leadership can be simply defined and basically described as the act of making particular impact on the sales team. Very likely, in sales management, a sales leader has some effect on salesmen. The sales leader’s behavior is also related to what type of perception is taken by sales-force. The main point of this study summarizes the development of the leader behavior assessment profile, which measures sales leadership styles in terms of telling, selling, participating and delegating. In the measurement, sixteen situations examined, so that a sales leader can make an assessment about his own leadership by self-monitoring.

  6. Implementation of Skills for Life for an Appropriate Approach to Men’s Conflicts: A View from the New Masculinities La implementación de habilidades para la vida en el adecuado abordaje de los conflictos en hombres: Una perspectiva desde las nuevas masculinidades

    Directory of Open Access Journals (Sweden)

    Wilbert Porras Quirós

    2013-08-01

    Full Text Available This paper refers to the implementation of skills for life for an appropriate approach to men’s conflicts: a view from the new masculinities. The objective is to understand how the implementation of the skills for life approach can contribute to find alternatives that would promote prevention, as well as an appropriate approach to conflicts and conflict resolution by male population. It studies the main canons of masculinity, conflict resolution, and skills for life. It concludes calling attention to the implementation of skills for life in the strengthening of masculinities raising awareness of the importance of gender equality and equity as part of self-fulfillment.Recibido 29 de agosto de 2012 • Corregido 09 de abril de 2013 • Aceptado 19 de junio de 2013El escrito trata el tema de la implementación de habilidades para la vida en el adecuado abordaje de los conflictos en hombres: Una perspectiva desde las nuevas masculinidades. El objetivo es evidenciar el aporte que puede brindar la implementación del enfoque de habilidades para la vida en el desarrollo de alternativas propiciadoras de la prevención, el abordaje y la resolución adecuada de conflictos por parte de la población masculina. En el escrito se abordan los principales preceptos de masculinidad, resolución de conflictos y habilidades para la vida. Se concluye, haciendo un llamado a la implementación de las habilidades para la vida en el fortalecimiento de masculinidades conscientes de la importancia de la equidad e igualdad de género como parte de la autorrealización.

  7. Algebraic Approach to the N-Body Long Range Scattering

    Science.gov (United States)

    Dereziński, Jan

    It is proven that if J, h are bounded continuous functions and H is an N-body Schrödinger operator then there exists s-lim limits {t-> ±∞ } eitH J ((x)/(t))h (H)e-itH. Limits of this form are used to study the N-body long range scattering.

  8. Agua(s) remisión de V. nivelador de (las) agua(s).

    OpenAIRE

    2011-01-01

    [ES] Definición del término Agua(s) remisión de V. nivelador de (las) agua(s). en el diccionario Dicter. [EN] Definition of the word Agua(s) remisión de V. nivelador de (las) agua(s). in the dictionary Dicter.

  9. Aceite(s) remisión de V. expresoria de aceite(s).

    OpenAIRE

    2011-01-01

    [ES] Definición del término Aceite(s) remisión de V. expresoria de aceite(s). en el diccionario Dicter. [EN] Definition of the word Aceite(s) remisión de V. expresoria de aceite(s). in the dictionary Dicter.

  10. Planeta(s) remisión de V. meridiano de los planeta(s).

    OpenAIRE

    2011-01-01

    [ES] Definición del término Planeta(s) remisión de V. meridiano de los planeta(s). en el diccionario Dicter. [EN] Definition of the word Planeta(s) remisión de V. meridiano de los planeta(s). in the dictionary Dicter.

  11. An Adaptive Approach for Defending against DDoS Attacks

    Directory of Open Access Journals (Sweden)

    Muhai Li

    2010-01-01

    Full Text Available In various network attacks, the Distributed Denial-of-Service (DDoS attack is a severe threat. In order to deal with this kind of attack in time, it is necessary to establish a special type of defense system to change strategy dynamically against attacks. In this paper, we introduce an adaptive approach, which is used for defending against DDoS attacks, based on normal traffic analysis. The approach can check DDoS attacks and adaptively adjust its configurations according to the network condition and attack severity. In order to insure the common users to visit the victim server that is being attacked, we provide a nonlinear traffic control formula for the system. Our simulation test indicates that the nonlinear control approach can prevent the malicious attack packets effectively while making legitimate traffic flows arrive at the victim.

  12. 估计三种常用疲劳应力-寿命模型P-S-N曲线的 统一经典极大似然法%A Unified Classical Maximum Likelihood Approach for Estimating P-S-N Curves of Three Commonly Used Fatigue Stress-Life Relations

    Institute of Scientific and Technical Information of China (English)

    赵永翔; 王金诺; 高庆

    2001-01-01

    拓展经典极大似然法到Langer模型,提出了估计三参数、Langer和Basquin三种常用疲劳应力-寿命模型P-S-N曲线及其置信限的统一方法。方法用于处理极大似然法疲劳试验得到的S-N数据。该试验在特别关注的参考载荷试验一组试样,其余试样在不同载荷下试验。以参考载荷试验数据的统计参量为基础,按照每个模型中材料常数协同处于相同概率水平原则,将曲线表示为对数疲劳寿命均值和均方差线的广义形式,至多4个材料常数。曲线中的材料常数按极大似然原理采用数学规划法求出。45#碳钢缺口试样(kt=20)对称循环加载试验数据的分析说明了方法的有效性。分析还揭示合理模型有必要通过比较拟合效果、预计误差和应用安全性来确定。三参数模型的拟合效果最好,Langer模型稍差,Basquin模型较差。从拟合效果、预计误差和应用安全性角度,Basquin模型不适于描述该套数据。此外,经典极大似然法估计结果可能因受局部统计参量影响而给出非安全估计,有必要发展改进的可以最大限度减小这种影响的方法。%A unified classical maximum likelihood approach for estimating P-S-N curves of the three commonly used fatigue stress-life relations, namely three parameter, Langer and Basquin, is presented by extrapolating the classical maximum likelihood method to the Langer relation. This approach is applied to deal with the S-N data obtained from a so-called maximum likelihood method-fatigue test. In the test, a group of specimens are tested at a so-called reference load, which is specially taken care of by practice, and residual specimens are individually fatigued at different loads. The approach takes a basis of the local statistical parameters of the logarithms of fatigue lives at the reference load. According to an assumption that the material constants in each relation are concurrently in

  13. An approach to renormalization on the n-torus.

    Science.gov (United States)

    Rockmore, Daniel; Siegel, Ralph; Tongring, Nils; Tresser, Charles

    1991-07-01

    The coding theory of rotations (by inspecting closely their relation to flows) and the continued fractions algorithm (by considering even two-coloring of the integers with a given proportion of, say, blue and red) are revisited. Then, even n-coloring of the integers is defined. This allows one to code rotations on the (n-1)-torus by considering linear flows on the n-torus and yields a simple geometric approach to renormalization on tori by first return maps on the coding regions.

  14. Flavors in the microscopic approach to N=1 gauge theories

    CERN Document Server

    Ferrari, Frank

    2009-01-01

    In this note, we solve an extended version of the N=1 super Yang-Mills theory with gauge group U(N), an adjoint chiral multiplet and Nf flavors of quarks, by using the N=1 microscopic formalism based on Nekrasov's sums over colored partitions. Our main new result is the computation of the general mesonic operators. We prove that the generalized Konishi anomaly equations with flavors are satisfied at the non-perturbative level. This yields in particular a microscopic, first principle derivation of the matrix model disk diagram contributions that must be included in the Dijkgraaf-Vafa approach.

  15. On Marx’s human significance, Harvey’s right to the city, and Nussbaum’s capability approach

    NARCIS (Netherlands)

    Basta, C.

    2016-01-01

    In this article, I juxtapose David Harvey’s idea of the ‘right to the city’ and Martha Nussbaum’s central human capability of ‘control over one’s environment’, and I approach them from the perspective of their mutual convergence on Marx’s conception of human significance. In particular,
    I compar

  16. N.I. LAPIN’S SOCIOLOGY OF ORGANIZATIONS

    Directory of Open Access Journals (Sweden)

    A. I. Kravchenko

    2016-01-01

    Full Text Available In the Soviet period, sociology of organizations was not a leading trend, as used in its conceptual apparatus, the depth and thoroughness of the study of the problems is not always impressed by the ideological authorities. Much more loyal looked sociology of work, to prove the superiority of socialism over capitalism. But this feature makes it possible to consider it not outdated set of fundamental knowledge, based on which we can move forward boldly. A prominent contribution to the development of the field sociology has made a prominent Russian scientist N.I.Lapin, which modern readers know as a specialist in completely different directions. Over the study of the structure and functioning of organizations, cohesion small working group of brigade forms of work organization, leadership and management styles, formal and informal structure of the relationship, skill mix, professional selection and placement of personnel, labor discipline, organizational innovation, conditions and remuneration, motivation and stimulation, finally, the education of the worker and ideological activities in the workplace in the 1960–80s worked hundreds if not thousands of professionals of various profiles and preparedness: sociologists, psychologists, economists, philosophers, teachers, lawyers, engineers. The methodological basis of sociology of organizations have N.I. Lapin are an innovative approach, the theory of social groups, value-regulatory approach and the three-functional diagram of the organizational structure. 

  17. A.N. Prior’s Ideas on Tensed Ontology

    DEFF Research Database (Denmark)

    Jakobsen, David; Schärfe, Henrik; Øhrstrøm, Peter

    2011-01-01

    A.N. Prior’s work with Peirce’s philosophy and investigations into the formalisation of temporal ontology give rise to some important questions regarding time and existence. Some answers to these questions are considered in this paper, which deals mainly with A.N. Prior’s ideas on time and existe...

  18. Effective N-particle collisions in a hadronic transport approach

    CERN Document Server

    Oliinychenko, Dmytro

    2016-01-01

    Hadronic transport approaches based on an effective solution of the relativistic Boltzmann equation are widely applied for the dynamical description of heavy ion reactions at low beam energies. At high densities, the assumption of binary interactions often used in hadronic transport approaches may not be applicable anymore. Therefore, we introduce a way to include N-particle collisions effectively in a transport approach. This framework provides the opportunity to interpolate in a dynamical way between two different limits of kinetic theory: the dilute gas approximation and the ideal fluid case. This approach will be important for studies of the dynamical evolution of heavy ion collisions at low and intermediate energies as experimentally investigated at the beam energy scan program at RHIC, and in the future at FAIR and NICA. On the other hand, this new way of modelling hot and dense strongly-interacting matter might be relevant for small systems at high energies (LHC and RHIC) as well.

  19. Aproximación teórica al branding relacional: de las teorías de Fournier a las brand communities / A theoretical approach to relational branding: from Fournier’s theories to brand communities

    Directory of Open Access Journals (Sweden)

    Jorge David FERNÁNDEZ-GÓMEZ

    2015-01-01

    Full Text Available El entorno comunicativo actual está marcado por la existencia de múltiples redes de relaciones. La gestión de marca pone el acento en la consideración del individuo como ser relacional y se repiten ideas como “compromiso” o “conversación”. En este sentido, proliferan las propuestas teóricas que estudian la relación individuo-marca, si bien esta tendencia se extiende en los últimos años hacia la consideración de la relación individuo-marca-individuo. En este trabajo estudiamos desde un prisma teórico las perspectivas sobre branding relacional atendiendo a sus orígenes, desarrollo y consolidación. Asimismo, esbozamos los nuevos caminos que las marcas están explorando en su búsqueda de puntos de conexión emocionales con un nuevo consumidor con cada vez mayor deseo de participación.

  20. The one-loop worldsheet S-matrix for the AdS(n) x S(n) x T(10-2n) superstring

    CERN Document Server

    Roiban, Radu; Tseytlin, Arkady; Wulff, Linus

    2014-01-01

    We compute the massive-sector worldsheet S-matrix for superstring theories in AdS(n) x S(n) x T(10-2n) (with n=2,3,5) in the near BMN expansion up to one-loop order in inverse string tension. We show that, after taking into account the wave function renormalization, the one-loop S-matrix is UV finite. In an appropriate regularization scheme the S-matrix is consistent with the underlying symmetries of the superstring theory, i.e. for the n=3,5 cases it coincides with the one implied by the light-cone gauge symmetries with the dressing phases determined from the crossing equations. For the n=2,3 cases we observe that the massless modes decouple from the one-loop calculation of massive mode scattering, i.e. the 2n-dimensional supercoset sigma model and the full 10-dimensional superstring happen to have the same massive one-loop S-matrix.

  1. A DoS/DDoS Attack Detection System Using Chi-Square Statistic Approach

    Directory of Open Access Journals (Sweden)

    Fang-Yie Leu

    2010-04-01

    Full Text Available Nowadays, users can easily access and download network attack tools, which often provide friendly interfaces and easily operated features, from the Internet. Therefore, even a naive hacker can also launch a large scale DoS or DDoS attack to prevent a system, i.e., the victim, from providing Internet services. In this paper, we propose an agent based intrusion detection architecture, which is a distributed detection system, to detect DoS/DDoS attacks by invoking a statistic approach that compares source IP addresses' normal and current packet statistics to discriminate whether there is a DoS/DDoS attack. It first collects all resource IPs' packet statistics so as to create their normal packet distribution. Once some IPs' current packet distribution suddenly changes, very often it is an attack. Experimental results show that this approach can effectively detect DoS/DDoS attacks.

  2. A DoS/DDoS Attack Detection System Using Chi-Square Statistic Approach

    Directory of Open Access Journals (Sweden)

    Fang-Yie Leu

    2010-04-01

    Full Text Available Nowadays, users can easily access and download network attack tools, which often provide friendly interfaces and easily operated features, from the Internet. Therefore, even a naive hacker can also launch a large scale DoS or DDoS attack to prevent a system, i.e., the victim, from providing Internet services. In this paper, we propose an agent based intrusion detection architecture, which is a distributed detection system, to detect DoS/DDoS attacks by invoking a statistic approach that compares source IP addresses' normal and current packet statistics to discriminate whether there is a DoS/DDoS attack. It first collects all resource IPs' packet statistics so as to create their normal packet distribution. Once some IPs' current packet distribution suddenly changes, very often it is an attack. Experimental results show that this approach can effectively detect DoS/DDoS attacks.

  3. Quantitative Proteomic Approaches for Analysis of Protein S-Nitrosylation.

    Science.gov (United States)

    Qu, Zhe; Greenlief, C Michael; Gu, Zezong

    2016-01-01

    S-Nitrosylation is a redox-based post-translational modification of a protein in response to nitric oxide (NO) signaling, and it participates in a variety of processes in diverse biological systems. The significance of this type of protein modification in health and diseases is increasingly recognized. In the central nervous system, aberrant S-nitrosylation, due to excessive NO production, is known to cause protein misfolding, mitochondrial dysfunction, transcriptional dysregulation, and neuronal death. This leads to an altered physiological state and consequently contributes to pathogenesis of neurodegenerative disorders. To date, much effort has been made to understand the mechanisms underlying protein S-nitrosylation, and several approaches have been developed to unveil S-nitrosylated proteins from different organisms. Interest in determining the dynamic changes of protein S-nitrosylation under different physiological and pathophysiological conditions has underscored the need for the development of quantitative proteomic approaches. Currently, both gel-based and gel-free mass spectrometry-based quantitative methods are widely used, and they each have advantages and disadvantages but may also be used together to produce complementary data. This review evaluates current available quantitative proteomic techniques for the analysis of protein S-nitrosylation and highlights recent advances, with emphasis on applications in neurodegenerative diseases. An important goal is to provide a comprehensive guide of feasible quantitative proteomic methodologies for examining protein S-nitrosylation in research to yield insights into disease mechanisms, diagnostic biomarkers, and drug discovery.

  4. Bell's inequality for n spin-s particles

    CERN Document Server

    Cabello, A

    2002-01-01

    Mermin's inequality for n spin-1/2 particles and two dichotomic observables [Phys. Rev. Lett. 65, 1838 (1990)] is generalized to n spin-s particles and two maximal observables. It is shown that some multiparty multilevel Greenberger-Horne-Zeilinger states [A. Cabello, Phys. Rev. A 63, 022104 (2001)] maximally violate this inequality for any s. For a fixed n, the magnitude of violation is constant for any s, which provides a simple demonstration of the conclusion reached by Gisin and Peres for two spin-s particles in the singlet state [Phys. Lett. A 162, 15 (1992)]. For a fixed s, the violation grows exponentially with n, which provides a generalization to any s of Mermin's conclusion for n spin-1/2 particles.

  5. Polithematic Children’s Channel of television: an approach to a definition

    Directory of Open Access Journals (Sweden)

    Irene MELGAREJO MORENO

    2014-10-01

    Full Text Available The digitalization has created a new way to understand the television channels. There are several authors that have studied this theme –Cebrián (2004, Alcolea (2003, Bustamante (1999, etc. -,however, the approaches that have been made about thematic children’s channels are quite superfluous. This article carries out a revision of the existing theories about television, chilhood and thematic channels that provides a new terminology and formulates an approach to the Polithematic Children´s Channel definition, which shows the XXI Century television reality.

  6. Review of the N-quantum Approach to Bound States

    CERN Document Server

    Greenberg, O W

    2010-01-01

    We describe a method of solving quantum field theories using operator techniques based on the expansion of interacting fields in terms of asymptotic fields. For bound states, we introduce an asymptotic field for each (stable) bound state. We choose the nonrelativistic hydrogen atom as an example to illustrate the method. Future work will apply this N-quantum approach to relativistic theories that include bound states in motion.

  7. The historical conception of Carlos Ibarguren through his correspondence and other writings. An approach Aproximación al concepto histórico de Carlos Ibarguren a través de su correspondencia y otros escritos

    Directory of Open Access Journals (Sweden)

    Milagros Gallardo

    2010-05-01

    Full Text Available This work aims at achieving a first approach to the historical conception of Dr. Carlos Ibarguren (1877-1956, one of the main figures of the Argentinean intellectuality of the first half of the XX century. He has not been very much studied until now, in spite of having been one of an almost essential reference among the intellectuals of his time. Upon the basis of the documental corpus of reference: original handwritings of his works, correspondence and journalistic reviews, we have limited ourselves to the analysis of his works on the rosista period: “Manuelita” and “Juan Manuel de Rosas- Su vida, su tiempo, su drama” They were chosen due to the transcendence and repercussions that they had, both in the national and foreign intellectual world. The revolution of September 6, 1930 took place between the first and the second publication of this last book; we believe that this political event justifies the corrections and modifications that are present in the second edition. The analysis of the production contexts of both editions sheds lights on the evolution of Ibarguren thought. Taking into account that the History is a practice involving production techniques that leave textual marks, we had attempted at analyzing the theoretic methodological assumptions and the practice of writing so as to figure out the historical conception, the underlying perspectives and the influence of historiographic trends. It is a reflection on the way on which Ibarguren constructs the historical account, in the light of central categories such as: the relation subject/object, theory/empiry, interdisciplinariety, time conception and causality.Este trabalho se propõe realizar uma primeira aproximação ao conceito histórico do Dr. Carlos Ibarguren (1877-1956, uma das figuras principais do pensamento argentino da primeira metade do século XX, pouco estudada até agora, apesar de haver sido referência obrigatória entre os intelectuais de sua época. O

  8. S ALLÁ DE LA SELECCIÓN NATURAL

    Directory of Open Access Journals (Sweden)

    CARLOS E. SARMIENTO M.

    2009-01-01

    Full Text Available La explicación de la evolución de los organismos a través de selección natural es el núcleo del sistema conceptual de la biología gracias a su sencillez, a su poder explicativo así como a su coherencia con una cantidad impresionante de datos. No obstante, en algunos casos se ha transformado en un discurso por defecto que no permite penetrar y descubrir procesos mucho más complejos. Esta dificultad ha sido puntualizada por varios autores y el presente documento hace una síntesis de alternativas o delimitaciones al modelo de evolución por selección natural en varios niveles: se exploran las consecuencias del neutralismo genético. Se revisa cómo la complejidad de la relación genotipo y fenotipo puede dificultar la aplicación de un modelo genético simple de evolución por selección natural. Se discute la propuesta de extender la idea de neutralidad a los fenotipos mediante el modelo de equivalencia funcional. Se detallan algunos de los aspectos controversiales en la aplicación del concepto de adaptación y se discute cómo incluir la historia filogenética de los caracteres propuestos como adaptativos puede enriquecer la explicación de los mismos. Se revisan las consecuencias de estos análisis en cuatro áreas: adaptación, definición de especie, reconstruc- ción filogenética y conservación. Este documento en ningún momento niega el valor del modelo de evolución por selección natural, pero sí puntualiza la importancia de modelos distintos fuertemente afianzados en datos concretos rigurosamente analizados.

  9. S.E.N.S.I.B. project; Projet SENSIB. Rapport d'avancement 2005

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2006-07-01

    This report presents the state of progress of all the studies which constitute at present the S.E.N.S.I.B. project. The S.E.N.S.I.B. project receives a financial participation of the Ademe. The different chapters treat the following questions: the sensitivity of territories in the deposit; the sensitivity of grounds; the sensitivity of the banks of rivers; the sensitivity of the agricultural productions; the anthropological sensitivity of territories; comparative study of the global sensitivity of two sites; uncertainties, communication, perception and representation; assessment of the contributions to the S.E.N.S.I.B. project in 2005. (N.C.)

  10. EIA's approach to information quality

    Energy Technology Data Exchange (ETDEWEB)

    Freedman, S.R. (Energy Information Administration, Washington, DC (United States))

    1993-01-01

    EIA has evolved a unique approach to improving information quality in a decentralized statistical agency. The idea is to give the program offices full line responsibility for the quality of their products, but to rely on a quality assurance group to oversee their efforts. The quality assurance group assures that these efforts are effective through a systematic process of data and model evaluation, applied research to address technical problems, and administrative procedures and standards to promote improved practice. Together the program offices and the quality assurance group keep the agency's leadership fully appriased of quality concerns and actively involved in solving quality problems. After reviewing the overall approach, this article describes the kinds of evaluations that are done and the mix of administrative procedures and standards used to accomplish changes. The article concludes with a discussion of the kinds of problems that are amenable to this approach.

  11. GREEN‘S FUNCTION APPROACH IN APPROXIMATE CONTROLLABILITY PROBLEMS

    Directory of Open Access Journals (Sweden)

    Avetisyan A. S.

    2016-06-01

    Full Text Available A mathematical approach based on Green‘s function approach allowing to construct controls providing approximate controllability is suggested in the present paper. Representing the solution of governing system via Green’s formula and substituting it in prescribed terminal conditions, we obtain control functions providing approximate controllability of the system under study in explicit form. Choosing appropriate controls, we can provide required accuracy of approximation for prescribed conditions. Examples illustrating the procedure are described. Particularly, infinite string, controlled by a concentrated force, semi-infinite rod heated by a point heat source, finite rod heated from its boundary and parameter optimization for electrical circuit are considered. Results of computsations are brought.

  12. The population genetics of dN/dS.

    Science.gov (United States)

    Kryazhimskiy, Sergey; Plotkin, Joshua B

    2008-12-01

    Evolutionary pressures on proteins are often quantified by the ratio of substitution rates at non-synonymous and synonymous sites. The dN/dS ratio was originally developed for application to distantly diverged sequences, the differences among which represent substitutions that have fixed along independent lineages. Nevertheless, the dN/dS measure is often applied to sequences sampled from a single population, the differences among which represent segregating polymorphisms. Here, we study the expected dN/dS ratio for samples drawn from a single population under selection, and we find that in this context, dN/dS is relatively insensitive to the selection coefficient. Moreover, the hallmark signature of positive selection over divergent lineages, dN/dS>1, is violated within a population. For population samples, the relationship between selection and dN/dS does not follow a monotonic function, and so it may be impossible to infer selection pressures from dN/dS. These results have significant implications for the interpretation of dN/dS measurements among population-genetic samples.

  13. Estrés y alimentación

    OpenAIRE

    Baratucci, Yanina

    2011-01-01

    Las relaciones existentes entre el estrés y la alimentación se vienen estudiando desde hace mucho tiempo. Este es un trastorno que afecta actualmente a la población mundial, la cual se encuentra inmersa en una sociedad globalizada que exige individuos cada día más aptos y capacitados para enfrentar y resolver los problemas tanto laborales, sociales y como emocionales. Se plantea el siguiente problema de investigación: ¿Cuál es la relación existente entre el estrés y los patr...

  14. Scalar field Hadamard renormalisation in $AdS_{n}$

    CERN Document Server

    Kent, Carl

    2013-01-01

    We outline an analytic method for computing the renormalised vacuum expectation value of the quadratic fluctuations and stress-energy tensor associated with a quantised scalar field propagating on $AdS_{n}$. Explicit results have been obtained using Hadamard renormalisation in the case of a massive neutral scalar field with arbitrary coupling to the curvature, for $n=2$ to $n=11$ inclusive.

  15. Estrés neonatal y frustración

    Directory of Open Access Journals (Sweden)

    Eliana Ruetti

    2010-01-01

    Full Text Available El estrés neonatal altera la respuesta emocional de ratas adultas. En una de sus formas, el estrés crónico neonatal aleatorio, produce una reducción comportamental, neurofisiológica y hormonal en respuesta a presentaciones de estímulos aversivos. La devaluación u omisión de los reforzadores esperados por aprendizajes previos provoca respuestas similares al dolor, al miedo y a la ansiedad, y esta reacción se denomina frustración. En este trabajo se presentan dos experimentos en los cuales las ratas sometidas a un estrés neonatal aleatorio y sus controles sin tratamiento se expusieron a dos procedimientos experimentales de frustración: el contraste sucesivo negativo consumatorio (CSNc, Experimento1 y la extinción consumatoria (Ec, Experimento 2. En el CSNc, la respuesta del tiempo de bebedero de animales que pasan de recibir una solución azucarada del 32% al 4%, se compara con el desempeño de animales que siempre recibieron solución al 4%. En la Ec, los animales reciben durante la adquisición la solución al 4% y luego se les presenta el bebedero vacío. Los resultados obtenidos señalan que en el CSNc los animales expuestos a estrés neonatal presentaron una respuesta atenuada de frustración y en la Ec, una extincións acelerada, en relación con sus controles sin tratamiento neonatal. Estos hallazgos extienden los efectos del estrés neonatal hacia respuestas provocadas por situaciones de pérdida o decremento de incentivos.

  16. A theoretical approach of Asperger’s syndrome in children

    Directory of Open Access Journals (Sweden)

    Chrysoula Valamoutopoulou

    2010-07-01

    Full Text Available The Asperger’s Syndrome is reported in the pervasive developmental disorders and was categorized as a separate disorder, initially in the ICD‐10 (World Health Organization, 1992 and afterwards in the DSM‐IV (American Psychiatric Organization, 1994. The Asperger’s Syndrome is distinguished by a team of symptoms that concern the low output in the social interaction and the communication dexterities, as well as the increased stereotypical behavior in various activities and interests.Aim: The aim of this present study was the descriptive review of bibliography concerning the epidemiology, the differential diagnosis from the autism, the etiology, the diagnosis, the therapeutic approaches and the adaptation difficulty of the family environment, with regard to the investigation of the Asperger ’s syndrome.Material and method: In the present review, the methodology that was followed included specialized electronic research with regard to the Asperger’s syndrome in children, using special keywords.Results: The review of the bibliography showed that the individuals with Asperger’s syndrome experience really big difficulties in elementary social behaviors, as failure in the growth and creation of friendly relations or in the search of amusing activities with others. Also, they face difficulties in the comprehension of not verbal communication (body language and the other’s expressions, the attitudes of body and the eye contact.Conclusions: The precocious recognition of Asperger’ s syndrome is imperative, with final objective the continuous briefing and sensitization of all health professionals as well as the wider public toward this, under the prism of interdisciplinary approach.

  17. El apostolado educativo congregacionista francés y la construcción nacional en México: una aproximación ejemplar a la historia religiosa de las relaciones internacionales The French Congregationalist Educational Apostolate and National Construction in Mexico: an exemplary approach to the religious history of international relations

    Directory of Open Access Journals (Sweden)

    Camille Foulard

    2011-06-01

    Full Text Available Este artículo tiene como objetivo presentar las problemáticas de la implantación misionera congregacionista francesa contemporánea en México, en un momento que no sólo remite a la historia religiosa y misionera tal como pudo ser descrita por la historiografía tradicional europea. Las dificultades a las cuales se enfrentaron las congregaciones especializadas en la docencia para difundir su obra en la primera mitad del siglo XX, también deben ser analizadas a partir de los dos contextos nacionales mexicano y francés caracterizados por el desarrollo de la laicización y de la secularización de la sociedad y en los cuales el tema de la educación se volvió el principal vector para imponer proyectos de sociedad opuestos.This article seeks to present the problem of the implementation of contemporary French Congregationalist missionaries in Mexico at a time that not only takes one back to religious and missionary history as it could have been described by traditional European historiography. The difficulties faced by congregations specializing in teaching in disseminate their work during the first half of the twentieth century should also be analyzed on the basis of the Mexican and French national contexts characterized by the development of laicization and the secularization of society, in which the subject of education became the main vector for imposing opposing projects for society.

  18. Holography for $\\mathcal{N}=1^*$ on $S^4$

    CERN Document Server

    Bobev, Nikolay; Kol, Uri; Olson, Timothy; Pufu, Silviu S

    2016-01-01

    We construct the five-dimensional supergravity dual of the $\\mathcal{N}=1^*$ mass deformation of the $\\mathcal{N} =4$ supersymmetric Yang-Mills theory on $S^4$ and use it to calculate the universal contribution to the corresponding $S^4$ free energy at large 't Hooft coupling in the planar limit. The holographic RG flow solutions are smooth and preserve four supercharges. As a novel feature compared to the holographic duals of $\\mathcal{N} = 1^*$ on $\\mathbb{R}^4$, in our backgrounds the five-dimensional dilaton has a non-trivial profile, and the gaugino condensate is fixed in terms of the mass-deformation parameters. Important aspects of the analysis involve characterizing the ambiguities in the partition function of non-conformal $\\mathcal{N}=1$ supersymmetric theories on $S^4$ as well as the action of S-duality on the $\\mathcal{N}=1^*$ theory.

  19. Estudiando pinturas en cerámicas arqueológicas "Aguada Portezuelo" (ca. 600-900 AD del Noroeste Argentino: nuevos aportes a través de una aproximación arqueométrica por microespectroscopía de Ramán (MSR Studying Paintings On "Aguada Portezuelo" Archaeological Ceramics (Ca. Ad 600-900 From Northwest Argentina: New Evidence From An Archaeometric Approach Using Raman Microspectroscopy (Rms

    Directory of Open Access Journals (Sweden)

    Guillermo Adrián De La Fuente

    2008-12-01

    Full Text Available La microespectroscopía de Ramán (MSR es en la actualidad una técnica analítica bien establecida para la identificación de pigmentos en alfarería arqueológica que permite el estudio in situ de objetos de arte a través de una aproximación totalmente no destructiva. A través de la aplicación de esta técnica se puede obtener información sobre la naturaleza química de los diferentes pigmentos utilizados por los alfareros antiguos para realizar la decoración de las vasijas cerámicas. En este trabajo se presentan los primeros resultados obtenidos a partir de la aplicación de la técnica analítica microespectroscopía de Ramán (MSR en pinturas pre y postcocción de cerámicas arqueológicas Aguada Portezuelo, pertenecientes al Período Medio (ca. 600-900 AD del Noroeste Argentino. Con el objeto de explorar cuáles fueron las principales fuentes de origen de los pigmentos utilizados, se analizaron pinturas de color rojo, negro y marrón (ocres. Adicionalmente, se estudió la naturaleza química del engobe blanco precocción característico de la mayoría de los tipos cerámicos Aguada Portezuelo y se exploró la estructura molecular de las superficies internas de los pucos de color negro plomizo.Raman microspectroscopy (RMS is currently a well established analytical technique for pigment identification in archaeological pottery that enables the in situ study of art objects through a totally non destructive approach. Information on the chemical nature of the different pigments used by ancient potters to decorate ceramic vessels can be obtained directly through the application of this analytical technique. In this paper, the first analytical results obtained from the study of pre- and post-firing paintings in Aguada Portezuelo archaeological ceramics, from Middle Period (ca. AD 600-900 Northwest Argentina are presented. With the objective of exploring the origin of the pigments used in the past by potters, several paintings of red, black

  20. La formació permanent del professorat a Catalunya. Una visió a través del tractament de la formació de formadors i formadores en els plans institucionals Continuing training for teachers in Catalonia. An overview of the approach to training trainers in institutional plans La formación permanente del profesorado en Cataluña. Una visión a través del tratamiento de la formación de formadores/as en los planes institucionales

    Directory of Open Access Journals (Sweden)

    M. Teresa Colén

    2011-09-01

    Full Text Available L’article fa un recorregut històric pels plans de formació permanent del professorat d’infantil, primària i secundària a Catalunya. Centra l’anàlisi de l’evolució de la formació permanent en el tractament que els diferents plans de formació han fet de la figura del formador de formadors. Aquest element permet anar establint els aspectes que han suposat els moments de canvi. Es veu el progressiu distanciament de la formació de les universitats i la creixent institucionalització dels plans de formació. També s’exposa la dicotomia entre els objectius que es plantegen i l’escassa preparació i consideració que els plans atorguen a aquests professionals, deixant en un limbe poc definit les funcions, responsabilitats i atribucions que se’ls atorga ______________________________________________ L’article fait un parcours historique des plans de formation permanente des enseignants des écoles maternelles, primaires et secondaires en Catalogne. Il centre l’analyse de l’évolution de la formation permanente sur le traitement que les différents plans de formation ont fait de la figure du formateur de formateurs. Cet élément permet d’établir petit à petit les différents aspects qu’ont constitués les moments de changement. On y voit le distanciement progressif de la formation des universités et la croissante institutionnalisation des plans de formation. Il expose aussi la dichotomie entre les objectifs qui sont envisagés et les préparation et considération faibles que les plans accordent à ces professionnels, laissant dans le flou les fonctions, les responsabilités ainsi que les attributions qui leur sont accordéesThis article gives a historical survey of the in-service training plans for nursery, primary and secondary school teachers in Catalonia. It concentrates on analysing the development of in-service training in terms of how the different training plans have approached the figure who trains the

  1. On Possible S-Wave Bound States for an N-(N) System Within a Constituent Quark Model

    Institute of Scientific and Technical Information of China (English)

    CHANG Chao-Hsi; PANG Hou-Rong

    2005-01-01

    We try to apply a constituent quark model (a variety chiral constituent quark model) and the resonating group approach for the multi-quark problems to compute the effective potential between the NN- in S-wave (the quarks in the nucleons N and N-, and the two nucleons relatively as well, are in S wave) so as to see the possibility if there may be a tight bound state of six quarks as indicated by a strong enhancement at threshold of pp- in J/ψ and B decays. The effective potential which we obtain in terms of the model and approach shows if the experimental enhancement is really caused by a tight S-wave bound state of six quarks, then the quantum number of the bound state is very likely to be I = 1, JPC= 0-+.

  2. Tulczyjew’s approach for particles in gauge fields

    Science.gov (United States)

    Meng, Guowu

    2015-04-01

    In mid-1970s Tulczyjew discovered an approach to classical mechanics which brings the Hamiltonian formalism and the Lagrangian formalism under a common geometric roof: the dynamics of a particle with configuration space X is determined by a Lagrangian submanifold D of T{{T}*}X (the total tangent space of {{T}*}X), and the description of D by its Hamiltonian H: {{T}*}X\\to {R} (resp. its Lagrangian L: TX\\to {R}) yields the Hamilton (resp. Euler-Lagrange) equation. It is reported here that Tulczyjew’s approach also works for the dynamics of (charged) particles in gauge fields, in which the role of the total cotangent space {{T}*}X is played by Sternberg phase spaces. In particular, it is shown that, for a particle in a gauge field, the equation of motion can be locally presented as the Euler-Lagrange equation for a Lagrangian which is the sum of the ordinary Lagrangian L(q,\\dot{q}), the Lorentz term, and an extra new term which vanishes whenever the gauge group is abelian. A charge quantization condition is also derived, generalizing Dirac’s charge quantization condition from U(1) gauge group to any compact connected gauge group.

  3. Diazido{(S-1-phenyl-N,N-bis[(2-pyridylmethyl]ethanamine}copper(II

    Directory of Open Access Journals (Sweden)

    Sankara Rao Rowthu

    2011-07-01

    Full Text Available In the title compound, [Cu(N32(C20H21N3], the CuII ion is coordinated by the three N atoms of the (S-1-phenyl-N,N-bis[(2-pyridylmethyl]ethanamine ligand and two N atoms from two azide anions, resulting in a distorted square-pyramidal environment. A weak intermolecular C—H...N hydrogen-bonding interaction between one pyridine group of the ligand and an azide N atom of an adjacent complex unit gives a one-dimensional chain structure parallel to the c axis.

  4. David Hume e o “número de Dunbar”: uma abordagem evolucionista sobre os fundamentos da moralidade = David Hume and “Dunbar’s number”: an evolutionary approach to the foundations of morality

    Directory of Open Access Journals (Sweden)

    Araujo, Marcelo de

    2016-01-01

    Full Text Available O objetivo deste artigo é caracterizar o conceito de justiça como uma convenção social indispensável para a emergência de obrigações morais no contexto de grupos que ultrapassam o “numero de Dunbar”. O artigo retoma, por um lado, a teoria da justiça proposta por David Hume na terceira seção de Uma Investigação sobre os Princípios da Moral, e, por outro lado, a hipótese de Robin Dunbar acerca do número máximo de indivíduos com os quais uma pessoa pode manter relações sociais estáveis que envolvam laços de amizade, vínculos de família, e histórias pessoais compartilhadas

  5. Decomposition and reduction of N2O on CaS (100) surface: A theoretical account

    Science.gov (United States)

    Wu, Lingnan; Qin, Wu; Hu, Xiaoying; Ju, Shaoda; Dong, Changqing; Yang, Yongping

    2015-02-01

    The catalytic effect of CaS on N2O decomposition and reduction was investigated using density functional theory calculations. N2O approached the CaS (100) surface and crossed an energy barrier of 1.228 eV, decomposing into a free N2 molecule and an adsorbed O atom. The generated adsorbed O atom could be removed through two reaction pathways: binding with a neighboring adsorbed O atom into O2 with the barrier energy of 1.877 eV or reacting with another N2O molecule generating an adsorbed O2 with the barrier of 1.863 eV. The removal of the surface adsorbed O atom is the rate-determining step of the catalytic decomposition of N2O. In comparison with the homogeneous reaction between N2O and CO, CO accelerated the removal of the adsorbed O atom, hence improving the reduction of N2O on CaS (100). Furthermore, while compared with the CaO-catalytic removal of N2O, CaS is not as active as CaO for the decomposition and reduction of N2O. Our study is the first attempt to theoretically reveal the mechanism of CaS-catalytic decomposition and reduction of N2O, which provides a better understanding of the nitrogen chemistry in the reducing atmosphere zone of circulating fluidized bed boilers.

  6. Valoración de empresa Haceb Whirpool Industrial S.A.S.

    OpenAIRE

    Giraldo Cardona, Juan Camilo

    2015-01-01

    Este trabajo presenta la valoración de la empresa Haceb Whirlpool Industrial S.A.S. -- En la primera sección se describe la situación en estudio a través de la presentación de la empresa, una breve reseña histórica de cada uno de los accionistas, información del mercado de electrodomésticos en Colombia (especialmente la relacionada con el mercado de lavadoras), también se describe qué es un Joint Venture y por último la pertinencia de la valoración para los órganos de dirección -- En la segun...

  7. N-Square Approach for the Erection of Redundancy Codes

    Directory of Open Access Journals (Sweden)

    G. Srinivas,

    2010-04-01

    Full Text Available This paper addresses the area of data compression which is an application of image processing. There are several lossy and lossless coding techniques developed all through the last two decades. Although very high compression can be achieved with lossy compression techniques, they are deficient in obtaining the original image. While lossless compression technique recovers the image exactly. In applications related to medical imaging lossless techniques are required, as the loss of information is deplorable. The objective of image compression is to symbolize an image with a handful number of bits as possible while preserving the quality required for the given application. In this paper we are introducing a new lossless compression technique which even better reduces the entropy there by reducing the average number of bits with the utility of Non BinaryHuffman coding through the use of N-Square approach. Our extensive experimental results demonstrate that the proposed scheme is very competitive and this addresses the limitations of D value in the existing system by proposing a pattern called N-Square approach for it. The newly proposed algorithm provides a good means for lossless image compression.

  8. "Istun, söön..." : [luuletused] / Natasha Glebova

    Index Scriptorium Estoniae

    Glebova, Natasha

    2005-01-01

    Sisu: "Istun, söön..." / udmurdi keelest tõlkinud Aljona Vlassova, Irina Orehhova ; "Mina teda ei kutsunud..." / udmurdi keelest tõlkinud Inga Ignatjeva, Irina Orehhova ; Kas tead, kui palju..." / udmurdi keelest tõlkinud Irina Orehhova

  9. Filosofía ambiental de campo y conservación biocultural en el Parque Etnobotánico Omora: Aproximaciones metodológicas para ampliar los modos de integrar el componente social ("S" en Sitios de Estudios Socio-Ecológicos a Largo Plazo (SESELP Field environmental philosophy and biocultural conservation at the Omora Ethnobotanical Park: Methodological approaches to broaden the ways of integrating the social component ("S" in Long-Term Socio-Ecological Research (LTSER Sites

    Directory of Open Access Journals (Sweden)

    RICARDO ROZZI

    2010-03-01

    Full Text Available Para resolver los problemas derivados del cambio medioambiental global, los científicos y tomadores de decisiones reconocen que es necesario integrar más ampliamente el componente social o factor humano en la investigación ecológica. Proponemos que para lograr esta integración las redes de Sitios de Estudios Socio-Ecológicos a Largo Plazo (SESELP ofrecen una plataforma ideal, porque los sitios permiten abordar singularidades ecológicas, culturales y políticas a escala local, a la vez que integrar escalas globales a través del trabajo colaborativo en redes de sitios. Sin embargo, este trabajo socioecológico todavía requiere articular de mejor manera los programas desarrollados a múltiples escalas geográficas, ecológicas y políticas. Además, hasta el momento el componente social considerado en los programas SESELP ha sido fundamentalmente económico, dejando fuera la dimensión ética. La integración de la ética de manera sistemática en los programas SESELP está severamente limitada por la carencia de metodologías. Para contribuir a resolver esta limitación, hemos desarrollado una aproximación metodológica que denominamos “filosofía ambiental de campo”. Esta aproximación integra las ciencias ecológicas y la ética ambiental en educación y conservación biocultural a largo-plazo a través de un ciclo de cuatro pasos interrelacionados: i investigación interdisciplinaria ecológica y filosófica, ii composición de metáforas y comunicación a través de relatos simples, iii diseño de experiencias de campo guiadas con un sentido ecológico y ético, y iv habilitación de áreas de conservación in situ. Este ciclo se ha definido a posteriori analizando las experiencias efectivas del programa de investigación, educación y conservación biocultural del Parque Etnobotánico Omora, en la Reserva de Biosfera Cabo de Hornos (RBCH. El programa de Magíster en Ciencias con mención en Conservación Subantártica de la

  10. On deformations of AdS_n x S^n supercosets

    CERN Document Server

    Hoare, B; Tseytlin, A A

    2014-01-01

    We study the deformed AdS_5 x S^5 supercoset model of arXiv:1309.5850 which depends on one parameter kappa and has classical quantum group symmetry. We confirm the conjecture that in the ``maximal'' deformation limit kappa -> infinity this model is T-dual to ``flipped'' double Wick rotation of AdS_5 x S^5, i.e. dS_5 x H^5 space supported by an imaginary 5-form flux. In the imaginary deformation limit, kappa -> i, the corresponding target space metric is of a pp-wave type and thus the resulting light-cone gauge S-matrix becomes relativistically invariant. Omitting non-unitary contributions of imaginary WZ terms, we find that this tree-level S-matrix is equivalent to that of the generalized sine-Gordon model representing the Pohlmeyer reduction of the undeformed AdS_5 x S^5 superstring model. We also study in some detail similar deformations of the AdS_3 x S^3 and AdS_2 x S^2 supercosets. The bosonic part of the deformed AdS_3 x S^3 model happens to be equivalent to the symmetric case of the sum of the Fateev i...

  11. On integrable deformations of superstring sigma models related to AdS_n x S^n supercosets

    CERN Document Server

    Hoare, B

    2015-01-01

    We consider two integrable deformations of 2d sigma models on supercosets associated with AdS_n x S^n. The first, the "eta-deformation" (based on the Yang-Baxter sigma model), is a one-parameter generalization of the standard superstring action on AdS_n x S^n, while the second, the "lambda-deformation" (based on the deformed gauged WZW model), is a generalization of the non-abelian T-dual of the AdS_n x S^n superstring. We show that the eta-deformed model may be obtained from the lambda-deformed one by a special scaling limit and analytic continuation in coordinates combined with a particular identification of the parameters of the two models. The relation between the couplings and deformation parameters is consistent with the interpretation of the first model as a real quantum deformation and the second as a root of unity quantum deformation. For the AdS_2 x S^2 case we then explore the effect of this limit on the supergravity background associated to the lambda-deformed model. We also suggest that the two m...

  12. Study of human mesenchymal stem cells plasticity into radiation injured tissues in a N.O.D./S.C.I.D. mouse model: therapeutic approach of the multiple organ dysfunction; Etude de la capacite plastique des Cellules Souches Mesenchymateuses humaines (CSM) apres irradiation du tissu receveur: approche therapeutique de l'atteinte multiorgane radio-induite

    Energy Technology Data Exchange (ETDEWEB)

    Francois, S

    2006-01-15

    The therapeutic potential of bone marrow-derived human mesenchymal stem cells (h.M.S.C.) has recently been brought into the spotlight of many fields of research. One possible application of the approach is the repair of injured tissues arising from side effects of radiation treatments and accidents. The first challenge in cell therapy is to assess the quality of the cell and the ability to retain their differentiation potential during the expansion process. Efficient delivery to the sites of intended action is also necessary. We addressed both questions using h.M.S.C. cultured and then infused to Non Obese Diabetes/Severe Combined Immunodeficiency (N.O.D./S.C.I.D.) mice submitted to total body irradiation. Further, we tested the impact of additional local irradiation superimposed to total body irradiation (T.B.I.), as a model of accidental irradiation. Our results showed that the h.M.S.C. used for transplant have been expanded without significant loss in their differentiation capacities. After transplantation into adult unconditioned mice, h.M.S.C. not only migrate in bone marrow but also into other tissues. Total body irradiation increased h.M.S.C. implantation in bone marrow and muscle and further led to engraftment in brain, heart, and liver. Local irradiation, in addition to T.B.I., increased both specific homing of injected cells to the injured tissues and to other tissues outside the local irradiation field. M.S.C. may participate to restoration of intestinal homeostasis 3 days post abdominal irradiation. This study suggests that using the potential of h.M.S.C. to home to various organs in response to tissue injuries could be a promising strategy to repair the radiation induced damages. (author)

  13. Holography for ${\\cal N}=2^*$ on $S^4$

    CERN Document Server

    Bobev, Nikolay; Freedman, Daniel Z; Pufu, Silviu S

    2013-01-01

    We find the gravity dual of $\\mathcal{N}=2^*$ super-Yang-Mills theory on $S^4$ and use holography to calculate the universal contribution to the corresponding $S^4$ free energy at large $N$ and large 't Hooft coupling. Our result matches the expression previously computed using supersymmetric localization in the field theory. This match represents a non-trivial precision test of holography in a non-conformal, Euclidean signature setting.

  14. The influence of selection for protein stability on dN/dS estimations.

    Science.gov (United States)

    Dasmeh, Pouria; Serohijos, Adrian W R; Kepp, Kasper P; Shakhnovich, Eugene I

    2014-10-28

    Understanding the relative contributions of various evolutionary processes-purifying selection, neutral drift, and adaptation-is fundamental to evolutionary biology. A common metric to distinguish these processes is the ratio of nonsynonymous to synonymous substitutions (i.e., dN/dS) interpreted from the neutral theory as a null model. However, from biophysical considerations, mutations have non-negligible effects on the biophysical properties of proteins such as folding stability. In this work, we investigated how stability affects the rate of protein evolution in phylogenetic trees by using simulations that combine explicit protein sequences with associated stability changes. We first simulated myoglobin evolution in phylogenetic trees with a biophysically realistic approach that accounts for 3D structural information and estimates of changes in stability upon mutation. We then compared evolutionary rates inferred directly from simulation to those estimated using maximum-likelihood (ML) methods. We found that the dN/dS estimated by ML methods (ωML) is highly predictive of the per gene dN/dS inferred from the simulated phylogenetic trees. This agreement is strong in the regime of high stability where protein evolution is neutral. At low folding stabilities and under mutation-selection balance, we observe deviations from neutrality (per gene dN/dS > 1 and dN/dS dN/dS is robust to these deviations, ML tests for positive selection detect statistically significant per site dN/dS > 1. Altogether, we show how protein biophysics affects the dN/dS estimations and its subsequent interpretation. These results are important for improving the current approaches for detecting positive selection. © The Author(s) 2014. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.

  15. Nature of the N-H...S hydrogen bond.

    Science.gov (United States)

    Biswal, Himansu S; Wategaonkar, Sanjay

    2009-11-19

    The N-H...S hydrogen-bonded complexes of the model compounds of tryptophan (indole and 3-methylindole) and methionine (dimethyl sulfide, Me(2)S) have been characterized by a combination of experimental techniques like resonant two-photon ionization (R2PI), resonant ion dip infrared spectroscopy (RIDIRS), and fluorescence dip infrared spectroscopy (FDIRS) and computational methods like ab initio electronic structure calculations, atoms-in-molecules (AIM), natural bond orbital (NBO), and energy decomposition analyses. The results are compared with the N-H...O (M.H(2)O; M = indole, 3-methyl indole) sigma-type and N-H...Phi (M.benzene) pi-type hydrogen-bonded complexes. It was shown that the S(1)-S(0) band origin red shifts in the N-H...S hydrogen-bonded complexes correlated well with the polarizability of the acceptor rather than their proton affinity, contrary to the trend observed in most X-H...Y (X, Y = O, N, halogens, etc.) hydrogen-bonded systems. The red shift in the N-H stretching frequency in the N-H...S HB clusters (Me(2)S as HB acceptor) was found to be 1.8 times greater than that for the N-H...O hydrogen-bonded complexes (H(2)O as HB acceptor), although the binding energies for the two complexes were comparable. The energy decomposition analyses for all of the N-H...S hydrogen-bonded complexes showed that the correlation (or dispersion) energy has significant contribution to the total binding energy. It is pointed out that the binding energy of the N-H...S complex was also comparable to that of the indole.benzene complex, which is completely dominated by the dispersion interaction. Atoms-in-molcules (AIM) and natural bond orbital (NBO) analyses indicated a nontrivial electrostatic component in the hydrogen-bonding interaction. Greater dispersion contribution to the stabilization energy as well as greater red shifts in the N-H stretch relative to those of N-H...O hydrogen-bonded complexes makes the indole.dimethylsulfide complex unique in regard to the

  16. S-variable approach to LMI-based robust control

    CERN Document Server

    Ebihara, Yoshio; Arzelier, Denis

    2015-01-01

    This book shows how the use of S-variables (SVs) in enhancing the range of problems that can be addressed with the already-versatile linear matrix inequality (LMI) approach to control can, in many cases, be put on a more unified, methodical footing. Beginning with the fundamentals of the SV approach, the text shows how the basic idea can be used for each problem (and when it should not be employed at all). The specific adaptations of the method necessitated by each problem are also detailed. The problems dealt with in the book have the common traits that: analytic closed-form solutions are not available; and LMIs can be applied to produce numerical solutions with a certain amount of conservatism. Typical examples are robustness analysis of linear systems affected by parametric uncertainties and the synthesis of a linear controller satisfying multiple, often  conflicting, design specifications. For problems in which LMI methods produce conservative results, the SV approach is shown to achieve greater accuracy...

  17. A Construction of (n+s,m,t+s)-Resilient Functions%一种(n+s,m,t+s)-Resilient函数的构造

    Institute of Scientific and Technical Information of China (English)

    岳廷海; 陈鲁生; 符方伟

    2007-01-01

    For constructing (n + s, m,t + s)-resilient functions from 2 known (n, m, t)-resilient functions, a necessary and sufficient condition is given firstly in this paper. Not only does it provide a construction technique for multiple output binary resilient functions, but also the order of resiliency and the dimension of Vn are increased synchronously, and the order of resiliency is increased more quickly than some previously known construction methods. Next the nonlinearity and propagation characteristics for (n+s)-input, m-output functions constructed by this method are discussed and the algebraic degree for a special case is calculated. Some useful and important results are obtained. Finally, an example is given to illustrate this construction method.%首次给出一个从2s个已知的(n,m,t)-resilient函数构造(n+s,m,t+s)-resilient函数的充分必要条件.它不仅提供了一种构造二元向量输出Resilient函数的方法,而且Resiliency的阶数和Vn的维数是同步增加的,以及Resiliency的阶数的增加速度比已知的构造方法更快.进一步讨论了利用此方法构造的(n+s)个输入,m个输出函数的非线性度和传播特征以及在特殊情况下计算它们的代数次数,得了一些有应用价值的结果.最后给出一个例子来说明此种构造方法.

  18. Overcoming state within the Friedrich Nietzsche’s irrational approach

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    A. F. Zakharchuk

    2014-10-01

    Full Text Available The article analyzes the views of Nietzsche on the nature and significance of the state in the context of socio-political issues. Examines how the criticism of Nietzsche for the state’s phenomenon is related to his irrational approach to the socio-political sphere, and therefore also raises the question of the possibility of attracting these Friedrich Nietzsche’s ideas regarding the institution of the state to understanding contemporary socio-political processes. For the disclosure of the above tasks in the work undertaken analysis of the Friedrich Nietzsche’s ideas in terms of their correlation with some general philosophical ideas of the German philosopher. In particular understanding of Nietzsche role of the state has been analyzed in the context of ideas like the idea of a hierarchical society, the idea of the superman, the idea of true morality. These ideas go beyond the purely social and philosophical beliefs of the thinker, but they are essential for understanding the logic and purposes of the consideration of the Nietzschean idea of the state. These ideas have been analyzed in the study mainly critically, in particular given the Nietzsche’s controversial assessment of state as a negative phenomenon and situational positive assessment of the state’s role. It is noted that this duality of Nietzsche in this issue is just due to the formulation of more general philosophical problems then was stated above. At the same time, the work focuses on the possibility of positive reading Nietzsche’s position on the state, which is associated with the idea of the free will of the individual opposed to the dictates of the enslaved majority.

  19. Large N Free Energy of 3d N=4 SCFTs and AdS/CFT

    CERN Document Server

    Assel, Benjamin; Yamazaki, Masahito

    2012-01-01

    We provide a non-trivial check of the AdS_4/CFT_3 correspondence recently proposed in arXiv:1106.4253 by verifying the GKPW relation in the large N limit. The CFT free energy is obtained from the previous works (arXiv:1105.2551, arXiv:1105.4390) on the S^3 partition function for 3-dimensional N=4 SCFT T[SU(N)]. This is matched with the computation of the type IIB action on the corresponding gravity background. We unexpectedly find that the leading behavior of the free energy at large N is 1/2 N^2 ln N. We also extend our results to richer theories and argue that 1/2 N^2 ln N is the maximal free energy at large N in this class of gauge theories.

  20. APROXIMACIÓN BIOÉTICA A LAS TERAPIAS REPARATIVAS: TRATAMIENTO PARA EL CAMBIO DE LA ORIENTACIÓN HOMOSEXUAL APROXIMAÇÃO BIOÉTICA ÀS TERAPIAS REPARADORAS: TRATAMENTO PARA A MUDANÇA DE ORIENTAÇÃO HOMOSSEXUAL BIOETHICAL APPROACH TO RE-CONSTRUCTIVE THERAPIES: TREATMENT TO CHANGE THE HOMOSEXUAL ORIENTATION

    Directory of Open Access Journals (Sweden)

    Gabriel Jaime Montoya Montoya

    2006-01-01

    Full Text Available La articulación temática entre bioética y estudios de género resulta evidente, además de vigente, en el análisis de las llamadas terapias reparativas para la "corrección" o cambio de la orientación homosexual. En este artículo se exponen los elementos básicos que, a manera de insumos, permiten el diálogo bioético sobre este asunto. Se exponen los fundamentos de la orientación sexual y su reconocimiento como un derecho humano. Además, se toman algunos elementos teóricos respecto del empleo del poder médico como mecanismo de domesticación. En la parte final se analizan algunas características de las terapias reparativas y se exponen las razones que no hacen éticamente sustentable su aplicaciónA articulação temática entre bioética e estudos de gênero resulta evidente, além de vigente, na análise das chamadas terapias reparadoras de "correção" ou mudança da orientação homossexual. Neste artigo se expõem os elementos básicos que, em forma de insumos, permitem o diálogo bioético sobre este assunto. São apresentados os fundamentos da orientação sexual e seu reconhecimento como um direito humano. Além disso, aborda-se alguns elementos teóricos a respeito do emprego do poder médico como mecnismo de domestificação. Na parte final se analizam algumas características das terapias reparadoras e se expõe as razões que não tornam eticamente sustentável sua aplicaçãoThe interrelation between bioethics and gender studies is clear and contingent. It is obvious in the analysis of the re-constructive therapies for the "correction" or change of the homosexual orientation. This paper shows the fundamental elements which allow the bioethics dialogue about it in a summary way. Also, the fundamentals of the sexual orientation and their acknowledgement as a human right are exposed. Furthermore, some theoretical aspects are taken with respect to the use of physician power in the domesticating process. The paper finalizes

  1. Charge transfer in collisions of H+ with Li (1s22s, 2pz): TD-MADNESS approach

    Science.gov (United States)

    Domínguez-Gutiérrez, F. J.; Krstić, P. S.

    2016-10-01

    In this work we carry out a study of the single-electron charge transfer process for H+ collisions with atomic neutral lithium, in its ground and first excited state, at 1-25 keV amu-1. For this, we solve numerically the time dependent Schrödinger equation to the defined accuracy by using a multi-resolution adaptive approach, thus removing the uncertainties connected to a basis size and spatial and temporal numeric mesh size. We approximate the atomic lithium target by a single electron model in a frozen-core pseudo-potential while the projectile follows a straight line trajectory. Within these approximations we report new benchmark data for charge transfer cross sections to n = 2, and 3 states of hydrogen from 1s22s and 1s22pz of Li. Available theoretical and experimental data in the literature are in reasonable agreement with our results.

  2. S-duality in N=4 Yang-Mills theories

    CERN Document Server

    Girardello, L; Porrati, Massimo; Zaffaroni, A

    1995-01-01

    Evidence in favor of SL(2,Z) S-duality in N=4 supersymmetric Yang-Mills theories in four dimensions and with general compact, simple gauge groups is presented. (Contribution to the Proceedings of the Strings '95 conference, March 13-18, 1995, USC, and the Proceedings of the Trieste Conference on S-Duality and Mirror Symmetry June 5-9, 1995.)

  3. Anterior approach to the cervicothoracic junction: case series and literature review Acceso anterior de las lesiones de la unión cérvicotoracica: serie de casos y revisión de la literatura Acesso anterior das lesões da junção cérvicotorácica: série de casos e revisão da literatura

    Directory of Open Access Journals (Sweden)

    Asdrubal Falavigna

    2009-06-01

    Full Text Available OBJECTIVES: the authors report their experience with the anterior approach to the cervicothoracic junction at C7 to T4 vertebral bodies, how the radiological investigation was performed in order to define the need for manubriotomy, how was the surgical pitfalls and the clinical evaluation. METHODS: prospective cohort study with 14 patients who underwent an anterior approach to the cervicothoracic surgery during the period of January 1996 to January 2009. The patients underwent radiographic evaluation with computed tomography and magnetic resonance before surgery in order to identify when the manubriotomy was necessary. The surgery was usually performed from the left side through an anterior Smith-Robinson approach and manubriotomy when necessary. Mesh and cervical plate system were used for stabilization when corpectomy was performed. Nevertheless, in the cases with discal herniation C7-T1, the reconstruction was done with PEEK and cervical plate system. RESULTS: the mean age was 63 years old (range, 30-77 years and seven of the patients were men. The majority of cases had metastatic disease (n=8 or disc herniation (n=4. There were two complications related to the surgical procedures: one patient with dysphonia caused by a local hematoma and other one with lung infection. The mean surgical time, bleeding volume, pain intensity, medication intake and length of hospital stay were lower in the cases in which manubriotomy was not necessary. CONCLUSIONS: the anterior approach to the cervicothoracic junction is effective and presents low morbidity rate. In cases of injuries involving the C7 vertebral body and C7-T1 intervertebral disc herniation, a transcervical approach without the manubriotomy was indicated; when a T1 and/or T2 corpectomy was necessary, the transmanubrial approach usually was necessary in order to provide a good working space to perform a corpectomy and reconstruction. Performing manubriotomy increases surgical time, bleeding, pain

  4. Poland’s Trade with East Asia: An Outlier Approach

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    Tseng Shoiw-Mei

    2015-12-01

    Full Text Available Poland achieved an excellent reputation for economic transformation during the recent global recession. The European debt crisis, however, quickly forced the reorientation of Poland’s trade outside of the European Union (EU, especially toward the dynamic region of East Asia. This study analyzes time series data from 1999 to 2013 to detect outliers in order to determine the bilateral trade paths between Poland and each East Asian country during the events of Poland’s accession to the EU in 2004, the global financial crisis from 2008 to 2009, and the European debt crisis from 2010 to 2013. From the Polish standpoint, the results showed significantly clustering outliers in the above periods and in the general trade paths from dependence through distancing and improvement to the chance of approaching East Asian partners. This study also shows that not only China but also several other countries present an excellent opportunity for boosting bilateral trade, especially with regard to Poland’s exports.

  5. LA INNOVACIÓN EDUCATIVA EN EL PAÍS VASCO: INCLUSIÓN, EQUIDAD E INTEGRACIÓN EUROPEA

    Directory of Open Access Journals (Sweden)

    Pello Aramendi Jauregui

    2010-01-01

    Full Text Available La Consejería de Educación del Gobierno Vasco edita en 2008 el documento titulado "Líneas prioritarias de innovación educativa" donde se recogen las directrices de la innovación educativa en la comunidad. Los principios de inclusión, diversidad, equidad y perspectiva de futuro son los elementos rectores de la política de cambio en el País Vasco. Los temas preferentes que pretende impulsar la Administración son la interculturalidad, el plurilingüismo, la autonomía de centro, la convivencia, las TIC, la educación científica y la calidad de la enseñanza. El objetivo de este artículo es describir y analizar la política innovadora desarrollada por el Departamento de Educación de la Comunidad Autónoma del País Vasco. La metodología de la investigación es mixta (cuantitativa y cualitativa y ex post facto y para la recogida de información se han utilizado cuestionarios, entrevistas y grupos de discusión. Se ha trabajado con una muestra de 143 centros educativos de enseñanza obligatoria. Los resultados de la investigación indican que el profesorado de la comunidad percibe una gran dispersión en la actuación de la Administración, no se profundiza en los objetivos importantes, se abarcan demasiados temas, existe insatisfacción con la asesoría recibida por parte del profesorado, los criterios utilizados para seleccionar proyectos de formación e innovación no son adecuados y, finalmente, afirma que los centros educativos necesitan más autonomía de gestión de recursos humanos. Los centros más innovadores del País Vasco se caracterizan por reflexionar más en equipo, poseen normas y pautas claras de funcionamiento grupal, demuestran más dedicación al proyecto, gestionan mejor el tiempo, estáns satisfechos con la asesoría recibida y los docentes reciben más apoyo por parte del equipo directivo.

  6. Alzheimer’s Disease: Mechanism and Approach to Cell Therapy

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    Takashi Amemori

    2015-11-01

    Full Text Available Alzheimer’s disease (AD is the most common form of dementia. The risk of AD increases with age. Although two of the main pathological features of AD, amyloid plaques and neurofibrillary tangles, were already recognized by Alois Alzheimer at the beginning of the 20th century, the pathogenesis of the disease remains unsettled. Therapeutic approaches targeting plaques or tangles have not yet resulted in satisfactory improvements in AD treatment. This may, in part, be due to early-onset and late-onset AD pathogenesis being underpinned by different mechanisms. Most animal models of AD are generated from gene mutations involved in early onset familial AD, accounting for only 1% of all cases, which may consequently complicate our understanding of AD mechanisms. In this article, the authors discuss the pathogenesis of AD according to the two main neuropathologies, including senescence-related mechanisms and possible treatments using stem cells, namely mesenchymal and neural stem cells.

  7. S-matrix approach to the Z resonance

    CERN Document Server

    Riemann, T

    2016-01-01

    The proposed $e^+e^-$-collider FCC-ee aims at an unprecedented accuracy for $e^+e^-$ collisions into fermion pairs at the $Z$ peak, based on about $10^{13}$ events. The S-matrix approach to the $Z$ boson line shape allows the model-independent quantitative description of the reaction $e^+e^- \\to {\\bar f}f$ around the $Z$ peak in terms of few parameters, among them the mass $M_Z$ and width $\\Gamma_Z$ of the $Z$-boson. While weak and strong corrections remain "black", a careful theoretical description of the photonic interactions is mandatory. I introduce the method and describe applications and the analysis tool SMATASY/ZFITTER.

  8. Effective lagrangian approach to the theory of eta photoproduction in the N$^{*}$(1535) region

    CERN Document Server

    Benmerrouche, M; Zhang, J F; Benmerrouche, M; Mukhopadhyay, N C; Zhang, J F

    1995-01-01

    We investigate eta photoproduction in the N^{*}(1535) resonance region within the effective Lagrangian approach (ELA), wherein leading contributions to the amplitude at the tree level are taken into account. These include the nucleon Born terms and the leading t-channel vector meson exchanges as the non-resonant pieces. In addition, we consider five resonance contributions in the s- and u- channel; besides the dominant N^{*}(1535), these are: N^{*}(1440), N^{*}(1520),N^{*}(1650) and N^{*}(1710). The amplitudes for the \\pi^\\circ and the \\eta photoproduction near threshold have significant differences, even as they share common contributions, such as those of the nucleon Born terms. Among these differences, the contribution to the \\eta photoproduction of the s-channel excitation of the N^{*}(1535) is the most significant. We find the off-shell properties of the spin-3/2 resonances to be important in determining the background contributions. Fitting our effective amplitude to the available data base allows us to...

  9. LLRW disposal facility siting approaches: Connecticut`s innovative volunteer approach

    Energy Technology Data Exchange (ETDEWEB)

    Forcella, D.; Gingerich, R.E. [Connecticut Hazardous Waste Management Service, Hartford, CT (United States); Holeman, G.R. [Yale Univ., New Haven, CT (United States)

    1994-12-31

    The Connecticut Hazardous Waste Management Service (CHWMS) has embarked on a volunteer approach to siting a LLRW disposal facility in Connecticut. This effort comes after an unsuccessful effort to site a facility using a step-wise, criteria-based site screening process that was a classic example of the decide/announce/defend approach. While some of the specific features of the CHWMS` volunteer process reflect the unique challenge presented by the state`s physical characteristics, political structure and recent unsuccessful siting experience, the basic elements of the process are applicable to siting LLRW disposal facilities in many parts of the United States. The CHWMS` volunteer process is structured to reduce the {open_quotes}outrage{close_quotes} dimension of two of the variables that affect the public`s perception of risk. The two variables are the degree to which the risk is taken on voluntarily (voluntary risks are accepted more readily than those that are imposed) and the amount of control one has over the risk (risks under individual control are accepted more readily than those under government control). In the volunteer process, the CHWMS will only consider sites that have been been voluntarily offered by the community in which they are located and the CHWMS will share control over the development and operation of the facility with the community. In addition to these elements which have broad applicability, the CHWMS has tailored the volunteer approach to take advantage of the unique opportunities made possible by the earlier statewide site screening process. Specifically, the approach presents a {open_quotes}win-win{close_quotes} situation for elected officials in many communities if they decide to participate in the process.

  10. Análise da Abordagem da Controladoria em Dissertações dos Programas de Pós-graduação em Ciências ContábeisAnalysis of Approaches to Controllership in Master’s Thesis from Post-graduate Programs in Accounting SciencesAnálisis de la Aproximación a Controllership en Disertaciones en Postgrados en Ciencias Contables

    Directory of Open Access Journals (Sweden)

    FERNANDES, Luciano

    2008-09-01

    Full Text Available RESUMOO objetivo deste estudo é analisar a abordagem da Controladoria nas dissertações dos Programas de Pós-Graduação em Ciências Contábeis, do Brasil, tendo como referência os aspectos conceituais, procedimentais e organizacionais propostos por Borinelli (2006. A pesquisa é de cunho descritivo, com abordagem quantitativa. A amostra constitui-se de 26 dissertações que contêm a palavra “controladoria” no título. Como resultado da análise, observou-se, na Perspectiva I (aspectos conceituais, que não há consenso entre os autores das dissertações no que concerne a definição, objeto de estudo e relacionamento com outras ciências. Na Perspectiva II (aspectos procedimentais, que trata das atividades e funções por meio das quais essas área do conhecimento se materializa nas organizações, constatou-se que a abordagem das dissertações é bastante diferenciada no escopo de atividades. Com relação à Perspectiva III (aspectos organizacionais, também ficou evidente que não há consenso sobre quais são as atividades típicas da área, mas percebe-se que os autores concordam com a idéia de que a controladoria é um serviço ou uma função de informação. Conclui-se, portanto, que a abordagem da Controladoria, em seus aspectos conceituais, procedimentais e organizacionais, nas dissertações dos Programas de Pós-Graduação em Ciências Contábeis do Brasil é semelhante aos elementos propostos por Borinelli (2006.ABSTRACTThe objective of the study is to analyze approaches in master’s thesis in Brazilian Post-Graduate Programs in Accounting Sciences in relation to Controllership, in terms of their conceptual, procedural and organizational aspects, as proposed by Borinelli (2006. The research is descriptive and it uses a quantitative approach. The sample consists of 26 master’s thesis which have the word “Controllership” in their titles. Resulting from analysis, in Perspective I (conceptual aspects, in which the

  11. N=2 AdS supergravity and supercurrents

    CERN Document Server

    Butter, Daniel

    2011-01-01

    We consider the minimal off-shell formulation for four-dimensional N=2 supergravity with a cosmological term, in which the second compensator is an improved tensor multiplet. We use it to derive a linearized supergravity action (and its dual versions) around the anti-de Sitter (AdS) background in terms of three N=2 off-shell multiplets: an unconstrained scalar superfield, vector and tensor multiplets. This allows us to deduce the structure of the supercurrent multiplet associated with those supersymmetric theories which naturally couple to the supergravity formulation chosen, with or without a cosmological term. Finally, our linearized N=2 AdS supergravity action is reduced to N=1 superspace. The result is a sum of two N=1 linearized actions describing (i) old minimal supergravity; and (ii) an off-shell massless gravitino multiplet. We also derive dual formulations for the massless N=1 gravitino multiplet in AdS. As a by-product of our consideration, we derive the consistent supergravity extension of the N=1 ...

  12. Una aproximación a los postgrados e investigación en psicología paraguaya Uma aproximação aos programas de pesquisa e pós-graduação na psicologia paraguaia An approach to graduate and research in paraguayan psychology

    Directory of Open Access Journals (Sweden)

    Norma B. Coppari

    2011-04-01

    Full Text Available El derrotero histórico del país, en materia de desarrollo científico y tecnológico, muestra ausencia o peso insignificante, en las políticas de los gobiernos. En particular, los postgrados en Psicología han sido esporádicos, de cuestionable calidad y de escasa trascendencia en el contexto académico y profesional. Se requiere la implementación y fortalecimiento de políticas educativas de calidad y sistemáticas en educación superior y en especial de la formación científica en básica, aplicada y tecnológica. Se destacan los Tratados del MERCOSUR en formación, la creación de ANEAES (2003 para los procesos de acreditación de la calidad, y la labor de la SPPs para la Ley de Colegiatura. El siglo XXI espera por una Psicología Paraguaya fortalecida en su perfil científico-practicante local frente a desafíos regionales y mundiales.O traçado histórico do país, em termos de desenvolvimento científico e tecnológico, revela um peso insignificante ou inexistente por parte das políticas governamentais. Em particular, os programas de pós-graduação em psicologia têm sido esporádicos, de qualidade questionável e com pouca relevância no âmbito acadêmico e profissional. Faz-se imprescindível a implementação e o fortalecimento de políticas educativas sistemáticas e de qualidade no ensino superior, além da formação científica em pesquisa básica, aplicada e tecnológica. Destacam-se os tratados do MERCOSUL na formação e criação do ANEAES (2003 para os processos de creditação da qualidade, e o trabalho da SPPs para a Lei de Ensino. O século XXI traz a expectativa de uma psicologia paraguaia fortalecida em seu perfil científico-prático local, e apta a enfrentar os desafios regionais e mundiais.The historic route of the country, in terms of scientific and technological development, shows the insignificant weight in the policies of governments. In particular, the graduate degrees in psychology have been sporadic, of

  13. BUKOVINA’S TOURISM PERSPECTIVES – A STRATEGIC APPROACH

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    Pavel STANCIU

    2010-12-01

    Full Text Available Assuming that the market is the component that validates the correctness of decisions on the fate and prospects of a phenomenon, tourism development strategy should be based on good knowledge and assessment of the market, on the requirement to achieve a balance between its two correlative categories, which are supply and demand.Bukovina is among the touristic destinations known and appreciated by tourists. However, the elaboration of a development strategy should emphasize those tourism sustaining forms that can generate a beneficial multiplier effect upon Suceava County’s economy. Promoting a mix between cultural - religious, rural, active, and mountain tourism tour, accessible to a diverse range of tourists, must be coupled with general and specific infrastructural consolidation. These elements will be able to create favourable conditions conductive to the development of touristic “focal points” or will favour the development of “circuit - type” touristic programs with international visibility overlapped to the Bukovina’s territory, without excluding the possibility of their interconnection with adjacent areas like Maramureş, Neamţ and Chernovtsy Oblast.Main tourism coordinates analysis in the county of Suceava - arrivals, overnight stays, average stay, capacity utilization index etc. - show insufficient concern from local authorities to this field, which argues the need to develop a realistic strategy to approach the issue of tourism development in a modern, complex vision, connected to the latest theoretical results.

  14. AUTOMATIZACIÓN DE OFICINAS S.A.

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    Luis Carlos Diaz Osorio

    1998-01-01

    Full Text Available El caso muestra la situación de Automatización de Oficinas S.A., una empresa de gran trayectoria nacional, orientada a la comercialización de muebles y equipos para oficina. A principios de la década pasada, comenzó a comercializar microcomputadoras y elementos de conectividad de redes, manejando grandes márgenes por ser monopolio, aprovechando los beneficios de importación que le otorgaba el ser exportador de muebles. En el momento en que se abren las importaciones, más de doscientas empresas entran a competir en el mercado de los microcomputadores, llegando incluso a manejar márgenes de hasta el 10%. Las ventas de la empresa han bajado a niveles alarmantes, incluso se cree que únicamente compran empresas allegadas a los directivos o personas que no conocen nada del tema de los computadores. La situación puntual es la toma de decisión de las estrategias para ser competitivos o decidir salir del mercado de los PC. La orientación que hemos decidido darle al caso es “fijación de precios”.

  15. Multicharacterization approach for studying InAl(Ga)N/Al(Ga)N/GaN heterostructures for high electron mobility transistors

    Energy Technology Data Exchange (ETDEWEB)

    Naresh-Kumar, G., E-mail: naresh.gunasekar@strath.ac.uk; Trager-Cowan, C. [Dept of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG (United Kingdom); Vilalta-Clemente, A.; Morales, M.; Ruterana, P. [CIMAP UMR 6252 CNRS-ENSICAEN-CEA-UCBN 14050 Caen Cedex (France); Pandey, S.; Cavallini, A.; Cavalcoli, D. [Dipartimento di Fisica Astronomia, Università di Bologna, 40127 Bologna (Italy); Skuridina, D.; Vogt, P.; Kneissl, M. [Institute of Solid State Physics, Technical University Berlin, 10623 Berlin (Germany); Behmenburg, H.; Giesen, C.; Heuken, M. [AIXTRON SE, Kaiserstr. 98, 52134 Herzogenrath (Germany); Gamarra, P.; Di Forte-Poisson, M. A. [Thales Research and Technology, III-V Lab, 91460 Marcoussis (France); Patriarche, G. [LPN, Route de Nozay, 91460 Marcoussis (France); Vickridge, I. [Institut des NanoSciences, Université Pierre et Marie Curie, 75015 Paris (France)

    2014-12-15

    We report on our multi–pronged approach to understand the structural and electrical properties of an InAl(Ga)N(33nm barrier)/Al(Ga)N(1nm interlayer)/GaN(3μm)/ AlN(100nm)/Al{sub 2}O{sub 3} high electron mobility transistor (HEMT) heterostructure grown by metal organic vapor phase epitaxy (MOVPE). In particular we reveal and discuss the role of unintentional Ga incorporation in the barrier and also in the interlayer. The observation of unintentional Ga incorporation by using energy dispersive X–ray spectroscopy analysis in a scanning transmission electron microscope is supported with results obtained for samples with a range of AlN interlayer thicknesses grown under both the showerhead as well as the horizontal type MOVPE reactors. Poisson–Schrödinger simulations show that for high Ga incorporation in the Al(Ga)N interlayer, an additional triangular well with very small depth may be exhibited in parallel to the main 2–DEG channel. The presence of this additional channel may cause parasitic conduction and severe issues in device characteristics and processing. Producing a HEMT structure with InAlGaN as the barrier and AlGaN as the interlayer with appropriate alloy composition may be a possible route to optimization, as it might be difficult to avoid Ga incorporation while continuously depositing the layers using the MOVPE growth method. Our present work shows the necessity of a multicharacterization approach to correlate structural and electrical properties to understand device structures and their performance.

  16. Multicharacterization approach for studying InAl(GaN/Al(GaN/GaN heterostructures for high electron mobility transistors

    Directory of Open Access Journals (Sweden)

    G. Naresh-Kumar

    2014-12-01

    Full Text Available We report on our multi–pronged approach to understand the structural and electrical properties of an InAl(GaN(33nm barrier/Al(GaN(1nm interlayer/GaN(3μm/ AlN(100nm/Al2O3 high electron mobility transistor (HEMT heterostructure grown by metal organic vapor phase epitaxy (MOVPE. In particular we reveal and discuss the role of unintentional Ga incorporation in the barrier and also in the interlayer. The observation of unintentional Ga incorporation by using energy dispersive X–ray spectroscopy analysis in a scanning transmission electron microscope is supported with results obtained for samples with a range of AlN interlayer thicknesses grown under both the showerhead as well as the horizontal type MOVPE reactors. Poisson–Schrödinger simulations show that for high Ga incorporation in the Al(GaN interlayer, an additional triangular well with very small depth may be exhibited in parallel to the main 2–DEG channel. The presence of this additional channel may cause parasitic conduction and severe issues in device characteristics and processing. Producing a HEMT structure with InAlGaN as the barrier and AlGaN as the interlayer with appropriate alloy composition may be a possible route to optimization, as it might be difficult to avoid Ga incorporation while continuously depositing the layers using the MOVPE growth method. Our present work shows the necessity of a multicharacterization approach to correlate structural and electrical properties to understand device structures and their performance.

  17. Three Family N=1 SUSY Models from Z_n Orbifolded AdS/CFT

    CERN Document Server

    Kephart, T W; Kephart, Thomas W.

    2001-01-01

    We present an analysis of compactifications of the type IIB superstring on AdS_5 x S^5 / \\Gamma, where \\Gamma is an abelian cyclic group. Every \\Gamma =Z_n of order n<= 12 is considered. This results in 60 chiral models, and a systematic analysis with n<8 yields four containing the minimal SUSY standard model with three families. One of these models extends to an infinite sequence of three-family MSSMs. We also give a lower bound on the number of chiral models for all values of n.

  18. Photoproduction of $\\eta$s and N$*$(1535) electrostrong properties

    CERN Document Server

    Mukhopadhyay, N C; Benmerrouche, M; Mukhopadhyay, Nimai C

    1995-01-01

    From the new Mainz data of eta photoproduction off protons\\cite{ref1} and deuterons\\cite{ref2}, we can extract, via the effective Lagrangian approach (ELA)\\cite{ref3}, the electrostrong parameters \\xi_{p} and \\xi_{n} for the N^*(1535) excitation. These parameters are, in units of 10^{-4} MeV^{-1}, (2.20\\pm 0.15) and (-1.86\\pm 0.20) respectively. They yield the ratio of the helicity amplitudes for the excitation of N^*(1535) by photons off neutrons and protons to be A^{n}_{1/2}/A^{p}_{1/2}=-0.84\\pm 0.15, a quantity of fundamental importance in the baryon structure. Best estimates in the quark model are close to this ratio.

  19. N=2 supersymmetric sigma-models in AdS

    CERN Document Server

    Butter, Daniel

    2011-01-01

    We construct the most general N=2 supersymmetric nonlinear sigma-model in four-dimensional anti-de Sitter (AdS) space in terms of N=1 chiral superfields. The target space is shown to be a non-compact hyperkahler manifold restricted to possess a special Killing vector field. A remarkable property of the sigma-model constructed is that the algebra of OSp(2|4) transformations is closed off the mass shell.

  20. S^3/Z_n partition function and dualities

    CERN Document Server

    Imamura, Yosuke

    2012-01-01

    We investigate S^3/Z_n partition function of N = 2 supersymmetric gauge theories. A gauge theory on the orbifold has degenerate vacua specified by the holonomy. The partition function is obtained by summing up the contributions of saddle points with different holonomies. An appropriate choice of the phase of each contribution is essential to obtain the partition function. We determine the relative phases in the holonomy sum in a few examples by using duality to non-gauge theories. In the case of odd n the phase factors can be absorbed by modifying a single function appearing in the partition function.

  1. Gestión Ciudadana de la Tecnología: Una aproximación desde los Science and Technology Studies a las redes wifi y la governance urbana a través de guifi.net Citizen Management of Technology: A Science and Technology Studies approach to wireless networks and urban governance trough guifi.net

    Directory of Open Access Journals (Sweden)

    Yann Bona Beauvois

    2011-03-01

    Full Text Available

    Tesis doctoral a cargo de Yann Bona presentada en el Departamento de Psicología Social de la Univesriddad Autónoma de Barcelona (UAB en diciembre del 2010. Dirigida por el Dr. Joan Pujol Tarrés.

    La tesis trata de ahondar en las formas en las que iniciativas ciudadanas que tienen por objeto la gestión de la tecnología en el espacio urbano se relacionan con las administraciones públicas. Lo hace a partir de nociones y conceptos de los STS tales como cosmopolítica, composición híbrida o democracia técnica. En síntesis, podemos decir que la tesis responde a la pregunta formulada por Bruno Latour de ¿qué significa hacer pasar la política del lado lo de la técnica?. Nosotros ofrecemos una propuesta centrada en lo que denominamos una sociotécnica de las políticas públicas.

    La tesis se basa en un estudio de caso centrado una red sin hilos libre y abierta (ubicada principalmente en Cataluña y llamada guifi.net surgida del deseo e iniciativa de la sociedad civil y que, hasta la fecha, es la más grande del mundo.

    Thesis presented at the Departament de Psicologia Social de la UAB by Yann Bona on December, 2010. Directed by Dr. Joan Pujol Tarrés.

    This dissertation explores the many ways in which citizens aiming to manage technologies in urban scape relate to public administrations. To accomplish it's task, it brings forward certain STS notions such as cosmopolitics, hybrid composition or technical democracy. On a general level, this thesis seeks an answer to Bruno Latour concern with what does it mean to conceive the technical as political?. We offer a set of conclusions based on what we choose to name a Sociotechnique of Public Policy .

    Our work relies on a case study focused on a free and open wireless network (located in Catalunya for the most part and called guifi.net that emerged from the desire and will of Civil Society wich, up to date, turns out to be the world's biggest free

  2. Treatment for Paget’s disease: surgical approaches

    Directory of Open Access Journals (Sweden)

    E. Yu. Fetisova

    2015-01-01

    Full Text Available Breast cancer (BC ranks first in the pattern of female malignancies (20.7 % and remains the top cancer among women. Paget’s disease (PD is a rare BC form that occurs in the orifice of the lactiferous tubes and that is characterized by involvement of the nipple, large ducts, often to form a lump in the breast; this rare abnormality is encountered in 0.5–5 % of all BC cases. PD has a number of peculiarities. According to different authors, PD is attended with invasive or noninvasive BC in most cases (90–98 %. The involvement is commonly multifocal. PD has a very high risk for a lump (100 and 96 % for palpable and nonpalpable breast tumors, respectively. Almost 50 % of these patients have palpable breast lumps. Despite the fact that the course of PD has its peculiarities because of the rarity of this abnormality, the approaches to its treatment are not different from those in other histopathological types of BC. As for the surgical treatment of PD, until the present time there have been many unsolved problems that remain a matter of debate. The surgical treatment of PD does not differ from the treatment of BC and is primarily determined by disease stage and tumor subtype. The volume of operations for PD varies: from Madden’s radical mastectomy to lumpectomy and sentinel lymph node biopsy. It should be kept in mind that besides nipple-areole complex involvement, invasive or noninvasive BC is often detected in PD. Organ-sparing surgery for PD is mainly a method of rehabilitation for patients. Whether organsparing surgery can be performed is also determined by breast size. Oncoplaplastic resections may be carried out for PD. If the patient wishes to preserve her breast, the range of both single-stage and delayed reconstructive operations is wide. The assessment of the biological features of a tumor and the more differentiated approach to therapy in this cohort of patents might improve considerable survival rates; the determination

  3. 87Y(n,γ and 89,90Zr(n,γ cross sections from a surrogate reaction approach

    Directory of Open Access Journals (Sweden)

    Ota Shuya

    2015-01-01

    Full Text Available The surrogate reaction approach is an indirect method for determining nuclear reaction cross sections which cannot be measured directly or predicted reliably. While recent studies demonstrated the validity of the surrogate reaction approach for studying fission cross sections for short-lived actinides, its applicability for radiative neutron capture reactions ((n,γ is still under investigation. We studied the γ decay of excited 88Y and 90,91Zr nuclei produced by 89Y(p,d, 91Zr(p,d, and 92Zr(p,d reactions, respectively, in order to infer the 87Y(n,γ and 89, 90Zr(n,γ cross sections. The experiments were carried out at the K150 Cyclotron facility at Texas A&M University with a 28.5-MeV proton beam. The reaction deuterons were measured at forward angles of 25-60° with the array of three segmented Micron S2 silicon detectors. The compound nuclei with energies up to a few MeV above the neutron separation thresholds were populated. The coincident γ-rays were measured with the array of five Compton-suppressed HPGe clover detectors.

  4. Perturbative and non-perturbative approaches to the quantum AdS5xS5 superstring

    Science.gov (United States)

    McKeown, Ryan

    This dissertation spans perturbative to non-perturbative approaches of testing and using integrability of the IIB superstring in the AdS5xS 5 background. The integrability-based solution of string theories related to AdS n/CFTn-1 dualities relies on the worldsheet S matrix. In chapter 2 we use generalized unitarity to construct the terms with logarithmic dependence on external momenta at one- and two-loop order in the worldsheet S matrix for strings in a general integrable worldsheet theory. We also discuss aspects of calculations as it extends to higher orders. The S-matrix elements are expressed as sums of integrals with coefficients given in terms of tree-level worldsheet four-point scattering amplitudes. Off-diagonal one-loop rational functions, not determined by two-dimensional unitarity cuts, are fixed by symmetry considerations. They play an important role in the determination of the two-loop logarithmic contributions. We illustrate the general analysis by computing the logarithmic terms in the one- and two-loop four-particle S-matrix elements in the massive worldsheet sectors of string theory in AdS5xS5, AdS4xCP 3, AdS3xS3xS3xS 1 and AdS3xS3xT4. We explore the structure of the S matrices and provide explicit evidence for the absence of higher-order logarithms and for the exponentiation of the one-loop dressing phase. In chapter 3 we will construct the full coset space of AdS5xS5 SO4,1xSO 5 in terms of a Gross-Neveu model. After this non-perturbative transformation we have shown the theory to be UV finite at 1 loop and furthermore that it exhibits some non-local integrals of motion through a Lax connection. The integrability of string theory in AdS5xS 5 and of the dilatation operator of N = 4 super-Yang-Mills theory has been used to propose an exact solution to the spectral problem in these theories. Weak coupling perturbation theory both in gauge theory and on the worldsheet has been extensively used to verify this solution. In chapter 4 we demonstrate

  5. Pulsating strings from two-dimensional CFT on (T4N/S(N

    Directory of Open Access Journals (Sweden)

    Carlos Cardona

    2015-04-01

    Full Text Available We propose a state from the two-dimensional conformal field theory on the orbifold (T4N/S(N as a dual description for a pulsating string moving in AdS3. We show that, up to first order in the deforming parameter, the energy in both descriptions has the same dependence on the mode number, but with a non-trivial function of the coupling.

  6. Full-coupled channel approach to S=-2 s-shell hypernuclear systems

    Energy Technology Data Exchange (ETDEWEB)

    Nemura, H. [Institute of Particle and Nuclear Studies, KEK, Tsukuba 305-0801 (Japan)]. E-mail: hidekatsu.nemura@kek.jp; Shinmura, S. [Department of Information Science, Gifu University, Gifu 501-1193 (Japan); Akaishi, Y. [College of Science and Technology, Nihon University, Funabashi 274-8501 (Japan); Myint, Khin Swe [Department of Physics, Mandalay University, Mandalay (Myanmar)

    2005-05-30

    We describe full-coupled-channel ab initio calculations among the octet baryons for S=-2 s-shell hypernuclei, {sup 4}{sub {lambda}}{sub {lambda}}H, {sup 5}{sub {lambda}}{sub {lambda}}H and {sup 6}{sub {lambda}}{sub {lambda}}He. The wave function includes {lambda}{lambda}, {lambda}{sigma}, N{xi} and {sigma}{sigma} channels. Minnesota NN, D2' YN and Nijmegen model D simulated YY interactions are used. This is the first attempt to explore the few-body problem of the full-coupled channel scheme for A=4-6, S=-2 multistrangeness hypernuclear systems. Bound state solutions of the {lambda}{lambda} hypernuclei, {sup 4}{sub {lambda}}{sub {lambda}}H, {sup 5}{sub {lambda}}{sub {lambda}}H and {sup 6}{sub {lambda}}{sub {lambda}}He, are obtained.

  7. N=2 SUSY gauge theories on S^4

    CERN Document Server

    Hosomichi, Kazuo

    2016-01-01

    We review exact results in N=2 supersymmetric gauge theories defined on S^4 and its deformation. We first summarize the construction of rigid SUSY theories on curved backgrounds based on off-shell supergravity, then explain how to apply localization principle to supersymmetric path integrals. Closed formulae for partition function as well as expectation values of non-local BPS observables are presented.

  8. Proximity effect gaps in S/N/FI structures

    NARCIS (Netherlands)

    Huertas-Hernando, D.; Nazarov, Y.V.

    2005-01-01

    We study the proximity effect in hybrid structures consisting of superconductor and ferromagnetic insulator separated by a normal diffusive metal (S/N/FI structures). These stuctures were proposed to realize the absolute spin-valve effect. We pay special attention to the gaps in the density of state

  9. S-duality in N = 1 orientifold SCFTs

    Energy Technology Data Exchange (ETDEWEB)

    Garcia-Etxebarria, Inaki [Max Planck Institute for Physics, Munich (Germany); Heidenreich, Ben [Perimeter Institute for Theoretical Physics, Waterloo, ON (Canada)

    2017-03-15

    We present a general solution to the problem of determining all S-dual descriptions for a specific (but very rich) class of N = 1 SCFTs. These SCFTs are indexed by decorated toric diagrams, and can be engineered in string theory by probing orientifolds of isolated toric singularities with D3 branes. The S-dual phases are described by quiver gauge theories coupled to specific types of conformal matter which we describe explicitly. We illustrate our construction with many examples, including S-dualities in previously unknown SCFTs. (copyright 2017 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  10. Embajada de U. S. A., Karachi (Pakistán

    Directory of Open Access Journals (Sweden)

    Neutra, Richard J.

    1961-04-01

    Full Text Available Pakistán, un país con más de 90.000.000 de habitantes y en constante crecimiento, es una de las naciones más grandes del mundo. Se halla estratégicamente situado entre el Oriente Medio, el Sur de Asia y el centro de Asia. Ha sido uno de los aliados más firmes de los Estados Unidos y tiene importancia suficiente para desempeñar un papel importante en el concierto de las naciones. Richard Neutra fue consultado, primeramente, y más tarde, contratado con todo su equipo, Neutra y Alexander e ingenieros asociados, para estudiar y realizar la Embajada de los EE. UU. en Karachi.

  11. S.E.N.S.I.B. project. Progress report 2006; Projet SENSIB. Rapport d'avancement 2006

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2007-07-01

    This report presents the state of progress of all the studies which establish at present the S.E.N.S.I.B. project. For year 2006, the progress of the project is globally in compliance with the general schedule of realization of the S.E.N.S.I.B. project and with the perspectives announced in 2005. Factors of sensitivity were identified in diverse circles ( thematic studies) and methods and specific tools of the project are developed. 14 publications (reviews and congress) and 9 I.R.S.N. reports were produced. An international work group was launched to the I.R.S.N. initiative. The web site of S.E.N.S.I.B. on the I.R.S.N. scientific site was built. The S.E.N.S.I.B. project receives a financial participation of the Ademe. (N.C.)

  12. BC_NPI module for the analysis of Bc -> J/psi +n pi and Bc -> B_s +n pi decays within the EvtGen package

    CERN Document Server

    Berezhnoy, A V; Luchinsky, A V

    2011-01-01

    The module for the generation of $B_c$ meson decays into $J/\\psi + n\\pi$ and $B_s^{(*)} + n\\pi$ ($n\\le 4$) is implemented into EvtGen program package. The decay amplitudes are calculated in the frame work of factorization model. Within this approach the decay can be represented as $B_c$ decay into $J/\\psi (B_s)+W^*$ followed by the virtual $W^*$-boson decay into the final set of $\\pi$-mesons. The described calculation technique allows to adopt the parameters of $W^*\\to n\\pi$ transition from the analysis of $\\tau$ decay into $\

  13. The $B(B_{s})\\rightarrow D_{(s)}(\\bar{D}_{(s)}) T$ and $D_{(s)}^{*}(\\bar{D}_{(s)}^{*})T$ decays in perturbative QCD approach

    CERN Document Server

    Zou, Zhi-Tian; Lu, Cai-Dian

    2012-01-01

    In perturbative QCD approach, we investigate the $B(B_{s})\\rightarrow D_{(s)}(\\bar{D}_{(s)})\\,T$ and $D_{(s)}^{*}(\\bar{D}_{(s)}^{*})\\,T$ decays, which include the Cabibbo-Kobayashi-Maskawa (CKM) favored decays and the Cabibbo-Kobayashi-Maskawa-suppressed decays, where T denotes a light tensor meson. From our calculation, we find that the nonfactorizable emission diagrams and the annihilation type diagrams are important, especially for those color suppressed channels. For those decays with a tensor meson emitted, the factorizable emission diagrams vanish owing to the fact that a tensor meson can not be produced through the local (V-A) or tensor current. The numerical results show that the predictions for the branching ratios of considered charmed B decays are in the range of $10^{-4}$ to $10^{-6}$ for those CKM-favored decays (governed by $|V_{cb}|$) and in the range of $10^{-5}$ to $10^{-8}$ for those CKM-suppressed decays (governed by $|V_{ub}|$). We also predict large transverse polarization contributions i...

  14. Construcción del Otro, liberación de sí mismo.

    Directory of Open Access Journals (Sweden)

    Maritza Montero

    2002-01-01

    Full Text Available Este artículo discute la construcción de la categoría “sujeto” en las ciencias sociales, señalando el vuelco paradigmático que reconoce la voz de los sujetos de investigación, reconociendo su carácter de actores y constructores de conocimiento, propietarios de un saber, participantes en un proceso de investigación. Asimismo, se presenta un modo de ser y de conocer por relaciones, idea central de la ontología y de la episteme de la relación. La relación entre ser, conocer y ética se muestra como clave para comprender el carácter opresor y la exclusión de la distintividad del otro. Se analiza críticamente la noción psicosocial de self (sí mismo en la cual se ha hecho residir al ser del conocimiento, mostrando cómo en ella se construye al otro como complemento, o como opositor del sí mismo.Apartir de Levinas y de Dussel se indica cómo la liberación del yo, parte de una construcción del otro, que lo acepte analécticamente, en su diversidad.

  15. Marketing Management Relational Approaches Focused on Consumer’s and Customer’s Needs and Desires

    Directory of Open Access Journals (Sweden)

    Gheorghe MINCULETE

    2014-12-01

    Full Text Available Currently, because of the evolution in the knowledge-based society, the marketing reveals another dimension, the one of relational marketing, which represents the special relationship established between the company and its consumers, with win-win advantages over a long period. In these circumstances, the managerial approach of marketing has new connotations for a more efficient managerial approach of the new national and international business environment. Within the marketing management process of a company, consumers or customers play a very critical role as these are the people who finally buy the goods and services of the organization, and the firm is always on the move to make them buy so as to earn revenue.This article presents the managerial approach of marketing management concept toward the strategic planning of a company and the marketing planning focused on needs and desires of consumers and customers. Therefore, consumers are the beneficiaries of the general and marketing strategy of the company while customers are those who respond to the loyalty process established by the firm. In this context, the purpose of this analysis is to highlight the strategic planning process of a company by integrating the strategic and operational marketing.In addition, we also consider important the issues related to Michael Porter’s generic strategies, which are thus presented in the context of relational knowledge within the process of marketing management. All these approaches are related to winning customers’ loyalty and obviously to customers' value that determines the company to achieve a value chain in the business process. Hence, the consumers and customers are the most important people for any organization. They are the resources which trigger the success of the business.

  16. Bilinear approach to N=2 supersymmetric KdV equations

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    The N=2 supersymmetric KdV equations are studied within the framework of Hirota bilinear method. For two such equations, namely N=2, a=4 and N=2, a=1 supersymmetric KdV equations, we obtain the corresponding bilinear formulations. Using them, we construct particular solutions for both cases. In particular, a bilinear Bcklund transformation is given for the N=2, a=1 supersymmetric KdV equation.

  17. Estructuras sociales, división sexual del trabajo y enfoques metodológicos: La estructura familiar y la función socio-sanitaria de la mujer Social structures, sexual division of labour and methodological approaches: Family structure and women’s social-sanitary function

    Directory of Open Access Journals (Sweden)

    José Siles González

    2007-03-01

    Full Text Available La estructura familiar ha constituido un objeto de estudio esencial para describir y comprender la evolución educativa, profesional e ideológica de la mujer en la sociedad. Objetivo: Reflexionar sobre la familia como institución básica, y, asimismo, estructura social sobre la que ha recaído la socialización primaria en un marco de convivencia que ha resultado determinante en la adopción del rol de cuidadora de la mujer. Metodología: Técnicas de carácter etnográfico-narrativo han contribuido a la comprensión, interpretación y reinterpretación reconstructiva de la realidad. La teoría deconstruccionista y las técnicas narrativas de crítica literaria desde la perspectiva de género se han empleado como mecanismos para reinterpretar los aberrantes estereotipos acerca de la estructura familiar y el rol de cuidadora de las mujeres. Resultados: Se destaca el papel relevante de la familia en la función socio-sanitaria y en la asignación del papel de cuidadora a la mujer dentro del proceso de división sexual del trabajo. Asimismo se refleja, en el proceso de discusión, la dificultad para generalizar los resultados (limitación característica de los estudios cualitativos. Conclusiones: Cabe destacar la importancia de la familia en la socialización educativa y social, pero también la división sexual del trabajo cuya tipología organizativa, basada en diferencias de género, rebasó los límites de la estructura familiar. Es evidente que el rol de cuidadora de la mujer es consecuencia del proceso de socialización familiar.

  18. Physical Nature of the [S II]-bright Shell Nebulae N70 and N185

    CERN Document Server

    Zhang, Ning-Xiao; Williams, R M; Jiang, Bing; Chen, Yang; Gruendl, R A

    2014-01-01

    N70 and N185 are two large, $\\ge$100 pc in diameter, shell nebulae in the Large Magellanic Cloud (LMC). Their high [S II]/H$\\alpha$ ratios rival those of supernova remnants (SNRs), but they are not confirmed as SNRs. To study their physical nature, we have obtained XMM-Newton X-ray observations and high-dispersion long-slit echelle spectroscopic observations of these two nebulae. The X-ray spectra of both nebulae can be well interpreted with an optically thin thermal ($\\sim$0.2 keV) plasma with the average LMC abundance in a collisional ionization equilibrium. N70 encompasses the OB association LH114. Although N70 has a modest expansion velocity and essentially thermal radio emission, its diffuse X-ray luminosity, $\\sim6.1\\times10^{35}$ erg s$^{-1}$, is higher than that from a quiescent superbubble with N70's density, size, and expansion velocity; thus, N70 is most likely a superbubble that is recently energized by an interior SNR. N185 does not contain any known OB association, and its X-ray luminosity is an...

  19. Synthesis, Characterization, and Photocatalytic Activity of N-Doped ZnO/ZnS Composites

    Directory of Open Access Journals (Sweden)

    Hongchao Ma

    2013-01-01

    Full Text Available The aim of the present study is to enhance photocatalytic performance of ZnO semiconductor by comodification with doping of nonmetal ions and coupling with another semiconductor. Therefore, we synthesized the N-doped ZnO/ZnS photocatalysts via a simple heat-treatment approach using L-cysteine as N and S source in this work. Anthraquinone dye (reactive brilliant blue KNR is employed as the model contaminants to evaluate the photocatalytic activity of as-synthesized samples under sunlight illumination. The N-doped ZnO/ZnS synthesized by this method shows better photocatalytic activity as compared to that of pure ZnO. The enhanced photocatalytic activity of the N-doped ZnO/ZnS composites may be related to the existence of N doping, ZnS/ZnO heterostructure, and covered abundant carbon species on the photocatalyst surface, which causing high absorption efficiency of light, efficient separation of electron-hole pairs, and quick surface reaction in doped ZnO.

  20. Micromegas detector for $^{33}$S(n,$\\alpha$) cross section measurement at n_TOF

    CERN Multimedia

    The present proposal is a consequence of the successful tests performed in 2011 related to the Letter of Intent CERN-INTC-2010-023/I-092. The main goal of this proposal is a first (n,$\\alpha$) cross section measurement with the Micromegas detector presently running at n_TOF for monitoring purposes and fission cross section measurements. The $^{33}$S(n,$\\alpha$) cross section is of interest in astrophysics mainly due to the origin of $^{36}$S which is still an open question. $^{33}$S is also of interest in medical physics since it has been proposed as a possible/alternative cooperating target to boron neutron capture therapy. Important discrepancies between previous measurements of $^{33}$S(n,$\\alpha$) cross section and especially between the resonance parameters are found in the literature. We propose to measure the (n,$\\alpha$) cross section of the stable isotope $^{33}$S in the energy range up to 300 keV covering the astrophysical range of interest. The possibility of increasing this energy range will be st...

  1. AlN+MnS inclusions in oriented electrical steels

    Institute of Scientific and Technical Information of China (English)

    WANG Jun-an; ZHOU Bang-xin; LI Qiang; ZHU Yu-liang; SUN Huan-de

    2005-01-01

    Field emission-scanning electron mieroscopy(FE-SEM) technique was employed to observe the shape,size and distribution of AlN+MnS inclusions in oriented electrical steels. Specimens used for FE-SEM observation were deeply electrolytic etched at room temperature in non-aqueous aeetylaeetone(AA) solution. The results indicate that the FE-SEM technique has obvious advantage in specimen preparation. Therefore, it can be easily used to identify the AlN+MnS inclusions and even copper nano-particles in oriented electrical steels with the same analysis accuracy as that by TEM. This technique is a good substitute for TEM and the associated specimen preparation in the observation of inclusions in electrical steels. It will be a powerful technique for routine analysis in the production of grain oriented electrical steels.

  2. Noncommutative Spacetime Realized in $AdS_{n+1}$ Space

    CERN Document Server

    Naka, S; Takanashi, T; Umezawa, E

    2013-01-01

    In $\\kappa$-Minkowski spacetime, the coordinates are Lie algebraic elements such that time and space coordinates do not commute, whereas space coordinates commute each other. The non-commutativity is proportional to a Planck-length-scale constant $\\kappa^{-1}$, which is a universal constant other than the light velocity under the $\\kappa$-Poincare transformation. In this sense, the spacetime has a structure called as "Doubly Special Relativity". Such a noncommutative structure is known to be realized by SO(1,4) generators in 4-dimensional de Sitter space. In this paper, we try to construct a nonommutative spacetime having commutative n-dimensional Minkowski spacetime based on $AdS_{n+1}$ space with SO(2,n) symmetry. We also study an invariant wave equation corresponding to the first Casimir invariant of this symmetry as a non-local field equation expected to yield finite loop amplitudes.

  3. Enrique Gaitán S.J.

    OpenAIRE

    Espinoza de España, Maria Mercedes

    2014-01-01

    En el año 69, llegó un grupo de jóvenes jesuitas, que acababan de hacer los votos y que yo dirigía. Ellos entraron a estudiar a la Facultad de Filosofía y Letras. Teníamos la revista “Hombre y Expresión” en el Centro de Formación en Humanidades, y como aquí no había una revista, le propusimos su creación al Padre Rodolfo Eduardo de Roux, S.J., entonces Decano, quien dejó la Facultad muy pronto por lo cual no pudo atender nuestra inquietud de contar con un órgano de expresión.

  4. Progress in theoretical approach to InGaN and InN epitaxy: In incorporation efficiency and structural stability

    Science.gov (United States)

    Kangawa, Yoshihiro; Ito, Tomonori; Koukitu, Akinori; Kakimoto, Koichi

    2014-10-01

    The surface stability, growth process, and structural stability of InGaN and InN are reviewed from a theoretical viewpoint. In 2001, a new theoretical approach based on an ab initio calculation was developed. This theoretical approach enables the investigation of the influence of growth conditions such as partial pressure and temperature on the surface stability. The theoretical approach is applied to the research on the In incorporation efficiency in InGaN grown on nonpolar and semipolar surfaces. The calculation results suggest that the N-H layer formed on such surfaces has a crucial role in In incorporation. Moreover, the structural stability of InN grown by pressurized-reactor MOVPE is reviewed. It was found by the theoretical approach that \\{ 1\\bar{1}\\bar{1}\\} facet formation causes the spontaneous formation of islands with the zinc-blende structure.

  5. Synthetic approaches to peptides containing the L-Gln-L-Val-D(S)-Dmt motif.

    Science.gov (United States)

    Suaifan, Ghadeer A R Y; Arafat, Tawfiq; Threadgill, Michael D

    2007-05-15

    The pseudoprolines S-Dmo (5,5-dimethyl-4-oxaproline) and R-Dmt (5,5-dimethyl-4-thiaproline) have been used to study the effects of forcing a fully cis conformation in peptides. Synthesis of peptides containing these (which have the same configuration as L-Pro) is straightforward. However, synthesis of peptides containing S-Dmt is difficult, owing to the rapid cyclisation of L-Aaa-S-Dmt amides and esters to form the corresponding diketopiperazines (DKP); thus the intermediacy of L-Aaa-S-Dmt amides and esters must be avoided in the synthetic sequence. Peptides containing the L-Gln-L-Val-D(S)-Dmt motif are particularly difficult, owing to the insolubility of coupling partners containing Gln. Introduction of Gln as N-Boc-pyroglutamate overcame the latter difficulty and the dipeptide active ester BocPygValOC(6)F(5) coupled in good yield with S-DmtOH. BocPygVal-S- DmtNH(CH(2))(2)C(6)H(4)NO(2) was converted quantitatively to BocGlnVal-S-DmtNH(CH(2))(2)C(6)H(4)NO(2) with ammonia, demonstrating the utility of this approach. Two peptide derivatives (CbzSerLysLeuGlnVal-S-DmtNH(CH(2))(2)C(6)H(4)NO(2) and CbzSerSerLysLeuGlnVal-S- DmtNH(CH(2))(2)C(6)H(4)NO(2)) were assembled, using these new methods of coupling a dipeptide acid active ester with S-DmtOH and introduction of Gln as Pyg, followed by conventional peptide couplings. The presence of the Val caused these peptides to be cleaved very slowly by prostate-specific antigen (PSA) at Leu Gln, rather than the expected Gln Val.

  6. s allá de Piaget: cognición adulta y educación

    Directory of Open Access Journals (Sweden)

    Antonio Víctor MARTÍN GARCÍA

    2009-11-01

    Full Text Available RESUMEN: El objetivo de este artículo es intentar una aproximación a la descripción del tipo de pensamiento que utilizan los adultos. Partimos de la base en nuestro trabajo de que el conocimiento sobre el modo como piensan las personas adultas se presenta como un aspecto clave para la teoría pedagógica y especialmente para la práctica, cuando se orienta hacia este tipo de alumnos. Para ello, organizamos el texto integrando el concepto de pensamiento en un constructo más amplio y comprensivo como es el de cognición. Desde ese marco realizamos, en primer lugar, una síntesis crítica de la teoría piagetiana en lo referente al desarrollo cognitivo por cuanto representa el modelo, ya clásico, más elaborado sobre el tema, y en segundo, un análisis de algunas de las formulaciones teóricas y empíricas recientes más importantes sobre la cognición adulta, como por ejemplo las derivadas del procesamiento de la información, de la perspectiva del Life-span, o del denominado modelo de encapsulación. Terminamos intentando ofrecer el estado de la cuestión en relación con los aspectos nucleares del pensamiento adulto. Todo ello con vistas a apoyar procesos de intervención e investigación educativa en este campo.ABSTRACT: The aim this article is to attempt an approach to a description of the type of thought that adults use. We take for granted in our paper that knowledge about the way adults think is a key aspect in pedagogical, theory and especially in terms of practice when it is directed towards this type of students. With this in mind we organize the text integrating the concept of thought in a wider an more comprehensive construct which is cognition. From this framework we make, first of all, a critical synthesis of the Piaget theory related to cognitive development in as far as it represents the now classical model, but more developed on the subject and, secondly an analysis of some of the most important of the recent theoretical and

  7. Nutrición y envejecimiento: mejor nutrición, más vida

    OpenAIRE

    Sastre Gallego, Ana

    2004-01-01

    La humanidad envejece: la estadística lo acusa en las cifras referentes al mundo desarrollado. Enlos últimos cien años, la esperanza de vida ha ampliado su rango veinticinco años hacia adelante, cifra superior a la conseguida en cinco mil años de historia humana. Según estimaciones del Departamento Económico y Social de la Organización de Naciones Unidas, nuestro país tendrá en el año 2025 la poblacións anciana del mundo. Siete millones y medio de personas cumpliráns de sesent...

  8. S-Approximation: A New Approach to Algebraic Approximation

    Directory of Open Access Journals (Sweden)

    M. R. Hooshmandasl

    2014-01-01

    Full Text Available We intend to study a new class of algebraic approximations, called S-approximations, and their properties. We have shown that S-approximations can be used for applied problems which cannot be modeled by inclusion based approximations. Also, in this work, we studied a subclass of S-approximations, called Sℳ-approximations, and showed that this subclass preserves most of the properties of inclusion based approximations but is not necessarily inclusionbased. The paper concludes by studying some basic operations on S-approximations and counting the number of S-min functions.

  9. HOPF ALGEBRAIC APPROACH TO THE n LINEARLY RECURSIVE SEQUENCES

    Institute of Scientific and Technical Information of China (English)

    LIANGGUI

    1994-01-01

    It is proved that a linearly recursive sequence of n indicea over field F(n≥1) is autorntatically a product of n lioearly recurplve sequencea of 1-lndex over F by the theory of Hopf algebras.By the way,the correspondence between the set of linearly recursive sequenoes of 1-index and F[X]0 is generalised to the case of n-index.

  10. Análise da evasão no ProJovem Urbano: uma abordagem através do Modelo de Regressão Logística Multinível Análisis de la evasión en el ProJoven Urbano: un abordaje a través del Modelo de Regresión Logística Multinivel Analysis of the Urban 'ProJovem' evasion: an approach through the Multilevel Logistic Regression Model

    Directory of Open Access Journals (Sweden)

    Tufi Machado Soares

    2011-12-01

    a 29 años que, a pesar de alfabetizados, no concluyeron la Escuela Primaria. Aunque el programa atrae el interés de gran número de jóvenes, el abandono y la evasión que se verifican a lo largo del programa son muy altos. Este trabajo tiene como principal objetivo identificar los grupos de mayor incidencia de la evasión, para poder apoyar la implementación de medidas que la reduzcan. En estos términos, se usa un modelo logístico multinivel, se analizan las siguientes características de la población alcanzada: sexo, edad, etnia-color, último grado o año cursado, nivel de conocimiento en Matemáticas y Lengua Portuguesa al entrar en el Programa, nivel socioeconómico y la región metropolitana. Los resultados sugieren que los grupos de mayor incidencia de la evasión son definidos por las variables de sexo, edad y región.Despite the great achievements recorded in Brazilian Education in recent decades, the Brazilian system still has structured characteristics that hamper its socioeconomic development: the high rates of retention and school evasion. As a result, the educational level of the working age population is low. Under the responsibility of the Presidency of the Republic, the Urban ProJovem was designed: its primary goal is to promote the social inclusion of 18-29-year-old Brazilians who, even literate, have not completed Primary School. Although the Program attracted the interest of many young people, the withdrawal and evasion were still very high. This study aims to identify the main groups of higher incidence of evasion, with the aim to implement measures to reduce it. Thus, using a multilevel logistic approach, the following characteristics are taken into consideration: sex, age, race, color, last grade attended, levels of knowledge in Math and Portuguese at the entrance to the Program, socioeconomic level and the metropolitan area. The results suggest that the groups with higher incidence of evasion were defined by gender, sex, age and region.

  11. In Revered Memory of Prof. N.S. Vahia

    Directory of Open Access Journals (Sweden)

    Ajai R. Singh

    2008-01-01

    Full Text Available I have to record with deep sorrow and grief the demise in June 2007 of one of the doyens of clinical psychiatry in India, Prof. N.S. Vahia.Sharply arched eyebrows, deep-set eyes, soft spoken and gentle demeanour, excellent clinical skills, abiding interest in all branches of psychiatry, and a keen benevolent temperament. This is how most who knew, and met, Prof. N.S. Vahia will remember him.He came on the Indian psychiatric scene and headed the Psychiatry Department at Seth G.S. Medical College and K.E.M. Hospital when psychiatry was in its infancy here. A keen clinician and researcher, he helped establish a sound clinical and research base along with his junior colleagues at this institution. His works have been published in major international journals (Vahia, 1959, 1963; Vahia et al., 1966, 1972, 1973, 1975. His strong commitment was to bring psychiatry into the mainstream of medicine, and to interact actively with colleagues from various other departments to remove their misconceptions and prejudices about the branch. This was carried forward by many of his illustrious successors in the department, notably Prof. V.N. Bagadia and Prof. D.N. Doongaji.The major work for which he will be remembered in research was to understand and popularise Patanjali Yoga as a means of treatment in psychiatric disorders (Vahia et al., 1966, 1972, 1973, 1975. It is but fitting that a theme monograph like this, which includes well-being as one of its thrust areas, should be dedicated to someone who has done much to incorporate Patanjali Yoga into medical practice.[No abstract available. These are first few paragraphs. For full article, click URL.

  12. Fertilizer characterization: isotopic data (N, S, O, C, and Sr).

    Science.gov (United States)

    Vitòria, Laura; Otero, Neus; Soler, Albert; Canals, Angels

    2004-06-15

    A detailed isotopic characterization (delta15N(Ntotal), delta15N(NO3), delta18O(NO3), delta34S(SO4), delta18O(SO4), (delta13C(Ctotal), and 87Sr/86Sr) of 27 commercial fertilizers used in Spain is presented in this paper. Results together with a compilation of fertilizer isotopic published data are used for two purposes: (i) to identify the origin of the primary constituents and raw materials used in fertilizer manufacture and relate these data with their heavy metals and rare earth elements (REE) contents; (ii) to compare the fertilizer isotopic signatures with natural values and other anthropogenic pollutants and evaluate the usefulness of multi-isotopic analyses to trace fertilizer contaminations in future study cases. Isotope data permit us to know, in most cases, the origin of the primary constituents of fertilizers, and the 87Sr/86Sr ratio distinguishes the origin of the phosphate content--phosphorites or carbonatites--which in turn implies a qualitatively defined and potentially contaminant presence of REE and heavy metals in fertilizers. Delta15N, delta34S, and 87Sr/86Sr have already been used to trace fertilizer contaminations. Their utility can be improved by the coupled use of delta15N(NO3)-delta18O(NO3) and delta34S(SO4)-delta18O(SO4) to evaluate the fractionation processes that can affect contaminants. Moreover, multi-isotopic analyses, using heavy isotopes, allow us to see beyond the fractionation effects to the fertilizer stable isotope signatures and a better distinction from other anthropogenic contaminants.

  13. Synthesis, spectral (IR, UV-Vis and variable temperature NMR) characterization and crystal structure of (N-benzyl-N-furfuryldithicarbamato-S,S')(thiocyanato-N)(triphenylphosphine)nickel(II).

    Science.gov (United States)

    Valarmathi, P; Thirumaran, S; Sarmal, Lovely; Kant, Rajni

    2014-08-14

    Planar (N-benzyl-N-furfuryldithiocarbamato-S,S')(thiocyanato-N)(triphenylphospine)nickel(II), [Ni(bfdtc)(NCS)(PPh3)], (1) was prepared from bis(N-benzyl-N-furfuryldithiocarbamato-S,S')nickel(II), [Ni(bfdtc)2], (2) and characterized by elemental analysis, cyclic voltammetry, electronic, IR and variable temperature (1)H and (13)C NMR spectra. For complex 1, the thioureide vCN value is shifted to higher wavenumber compared to 2 and N(13)CS2 carbon signal observed for 1 is additionally shielded compared to the parent complex 2, suggesting increased strength of the thioureide bond due to the presence of the π-accepting phosphine. In the room temperature (13)C NMR spectrum of 1, two pseudo doublets are observed in the aliphatic region. Variable temperature (13)C NMR spectral studies suggest that the fast thiocyanate exchange appears to be responsible for the appearance of pseudo doublets. Single crystal X-ray structural analysis of 1 and 2 confirm the presence of four coordinated nickel in a distorted square planar arrangement with the NiS2PN and NiS4 chromophores, respectively. The NiS bonds are symmetric in 2 (2.1914(14) and 2.2073(13)Å). But significant asymmetry in NiS bond distances was observed in 1 (2.2202(8)Å and 2.1841Å). This observation clearly supports the less effective trans effect of SCN(-) over PPh3. Cyclic voltammetric studies revealed easier reduction of nickel(II) to nickel(I) in complex 1 compared to 2.

  14. N=2 supersymmetric gauge theory on connected sums of $S^2\\times S^2$

    CERN Document Server

    Festuccia, Guido; Winding, Jacob; Zabzine, Maxim

    2016-01-01

    We construct 4D $\\mathcal{N}=2$ theories on an infinite family of 4D toric manifolds with the topology of connected sums of $S^2 \\times S^2$. These theories are constructed through the dimensional reduction along a non-trivial $U(1)$-fiber of 5D theories on toric Sasaki-Einstein manifolds. We discuss the conditions under which such reductions can be carried out and give a partial classification result of the resulting 4D manifolds. We calculate the partition functions of these 4D theories and they involve both instanton and anti-instanton contributions, thus generalizing Pestun's famous result on $S^4$.

  15. Mesoscopic lateral S/N/S weak links: Josephson effects and Josephson-like vortex flow

    Science.gov (United States)

    Carapella, G.; Sabatino, P.; Gombos, M.

    2017-02-01

    We report an experimental and numerical study of magneto-transport properties of mesoscopic lateral S/N/S superconducting weak links where the N region is made of the same material as the S banks, though with strongly reduced critical temperature. Magnetoresistance oscillations and clear dc and ac Josephson effects are observed. Experimental results are analyzed in the framework of the time-dependent Ginzburg-Landau model for mesoscopic type II superconductors with an inhomogeneous critical temperature. The analysis suggests that dissipative branches of the current-voltage curve of the weak link in the presence of a magnetic field are accounted for by moving ‘Josephson-like’ vortices. These relatively fast excitations are anisotropic as per the ordinary Josephson vortex in tunnel junctions, but have a normal core like the ordinary Abrikosov vortex in plain superconducting strips. Moreover, unlike the vortex in tunneling junctions, in the lateral S/N/S weak link, the extension of the moving vortex is larger than the extension of the static one. Further, we report in some detail on the lateral proximity effect, and the deviations from the ideality of the current-phase relation of this kind of lateral weak link in the Josephson regime.

  16. A Decision Logic Approach to Mill’s Eliminative Induction

    Directory of Open Access Journals (Sweden)

    Piętka Dariusz

    2015-09-01

    Full Text Available The subject of the paper is a contemporary interpretation of J.S. Mill’s elimination method using selected concepts of Zdzisław Pawlak’s decision logic. The aim of the interpretation is to reformulate the original rules (canons of Mill’s induction so that they correspond more precisely to his concept of cause as a complex sufficient condition. In the first part of the paper, we turn to Mill’s writings and justify the thesis that in his understanding the cause is an aggregation of circumstances, and not a single circumstance; next, we point out that Mill’s original canons (for example the canon of agreement and the canon of difference do not allow causes-aggregations to be singled out from empirical data. In the second part of this paper, we present such aspects of Z. Pawlak’s decision logic that serve as the basis for the formalisation of the method of eliminative induction. We describe exhaustively the schema of induction that involves a gradual - divided into three stages - simplification of a set of implications corresponding to the observed dependencies [system of potential causes, effect]. The simplification is deductive because it maintains consistency within the set of implications. We show that such schema is ideal for isolating complex causes (aggregations of circumstances, ultimately described using complex conditional formulas of decision logic.

  17. Factorization of S^3/Z_n partition function

    CERN Document Server

    Imamura, Yosuke; Yokoyama, Daisuke

    2013-01-01

    We investigate S^3/Z_n partition function of 3d N = 2 supersymmetric field theories. In a gauge theory the partition function is the sum of the contributions of sectors specified by holonomies, and we should carefully choose the relative signs among the contributions. We argue that the factorization to holomorphic blocks is a useful criterion to determine the signs and propose a formula for them. We show that the orbifold partition function of a general non-gauge theory is correctly factorized provided that we take appropriate relative signs. We also present a few examples of gauge theories. We point out that the sign factor for the orbifold partition function is closely related to a similar sign factor in the lens space index and the 3d index.

  18. A Formula of S2(n, n - 6) of the Second Kind Stirling Numbers%第二类stirling数S2(n,n - 6)的一个公式

    Institute of Scientific and Technical Information of China (English)

    吴跃生

    2008-01-01

    运用组合理论对第二类stirling数开展了分析.第二类stirling数S2(n,n - 6)表示把含有n个元素的一个集合分成恰好有n-6个非空子集合的分拆数目,根据第二类stirling数S2(n,n - 6)的定义,利用组合数的计算公式,给出当n≥12时的第二类stirling数S2(n,n - 6)的一个公式.

  19. A theoretical approach of Asperger’s syndrome in children

    OpenAIRE

    Chrysoula Valamoutopoulou; Ioannis Koutelekos

    2010-01-01

    The Asperger’s Syndrome is reported in the pervasive developmental disorders and was categorized as a separate disorder, initially in the ICD‐10 (World Health Organization, 1992) and afterwards in the DSM‐IV (American Psychiatric Organization, 1994). The Asperger’s Syndrome is distinguished by a team of symptoms that concern the low output in the social interaction and the communication dexterities, as well as the increased stereotypical behavior in various activities and interests.Aim: The a...

  20. Using an Anion Exchange Membrane to Predict Soil Available N and S Supplies and the Impact of N and S Fertilization on Canola and Wheat Growth

    Institute of Scientific and Technical Information of China (English)

    P. QIAN; J. J. SCHOENAU

    2007-01-01

    A growth chamber study was conducted to determine the relationships between the supply of soil available nitrogen (N) and sulfur (S) and canola (Brassica napus) and wheat (Triticum aestivum L. 'Biggar') N and S uptake and yield in three Western Canadian soils. The suitability of one-hour burial with an anion exchange membrane (AEM) was assessed for its utility as a quick test of the available N:S balance in the soil. Canola and wheat were grown on a Luvisolic soil low in available S and on Brown and Black Chernozemic soils low in both available N and S, with different rates and combinations of N and S fertilizers applied. AEM burial was used to assess soil available nitrate and sulfate supply rates after fertilization. Dry matter yield and N and S concentrations in plant tissues were determined after 6 weeks of growth.The soil available N:S ratio determined by AEM burial closely reflected the relative supplies of available N and S as revealed in the N:S ratios of plant tissue dry matter. The highest yields were achieved where the available N:S ratio in soil and plant tissue ranged from 5 to 13. Thus, a one-hour burial of an AEM probe in the field may be a useful tool to quickly test if a balanced N and S supply is present in the soil for optimum crop yield.

  1. Impossible cartographies: approaching Raúl Ruiz’s cinema

    Directory of Open Access Journals (Sweden)

    Michael Goddard

    2013-06-01

    Full Text Available Raúl Ruiz (1931-2011, while considered one of the world’s most significant filmmakers by several film critics, is yet to be the subject of any thorough academic engagement with his work in English. My book Impossible Cartographies sets out on this task by mapping, as fully as possible, Ruiz’s cinematic trajectory across more than five decades of prolific work ranging from his earliest work in Chile to high budget ‘European’ costume dramas culminating in the recent Mysteries of Lisbon (2010. It does this by treating Ruiz’s work, with its surrealist, magic realist, popular cultural and neo-Baroque sources, as a type of ‘impossible’ cinematic cartography, mapping real, imaginary and virtual spaces, and crossing between different cultural contexts, aesthetic strategies, and technical media. In argues that across the different phases of Ruiz’s work identified, there are key continuities such as the invention of singular cinematic images and the interrogation of their possible and impossible combinations. This article will present some of the key themes of Ruiz’s cinema and use ideas of virtual cartography, tableaux vivants and the neo-baroque to illuminate a range of Ruiz’s films from the Hypothesis of the Stolen Painting (1978 to Mysteries of Lisbon, his last major project.

  2. Estudio de los expedientes de determinación de contingencia en una dirección provincial del I.N.S.S.

    Directory of Open Access Journals (Sweden)

    María Begoña Rodríguez Gallego

    Full Text Available Se realiza un estudio descriptivo de 248 expedientes de determinación de contingencia realizados en la Dirección Provincial del INSS entre diciembre de 2012 y septiembre de 2013. De dichos expedientes se recogieron nueve variables trasformando las no numéricas en valores numéricos: edad, sexo, entidad gestora responsable del pago de la prestación, causa alegada como causante de la baja laboral, contingencia final, tipo de empresa, régimen de seguridad social del trabajador, profesión y concordancia entre propuesta del Médico Evaluador y la resolución final. Encontramos que los sobresfuerzos/sobrecarga en el trabajo son la principal causa alegada como motivo de baja laboral (43,5%; la mayoría (90,3% de los expedientes tienen como entidad gestora responsable del pago a una Mutua; algo más de la mitad de los expedientes (57,7% terminan siendo considerados de contingencia común; y la discrepancia entre la conclusión del Inspector Médico en el informe médico y la decisión del Equipo de Valoración de Incapacidades es excepcional ocurriendo en sólo un 1,61% de los expedientes.

  3. Biomimetic approach for the synthesis of N, N'-diarylsubstituted formamidines catalyzed by β-cyclodextrin in water

    Institute of Scientific and Technical Information of China (English)

    Dipak R.Patil; Dipak S.Dalal

    2012-01-01

    An environmentally benign and highly efficient biomimetic approach for the synthesis of N,N'-diarylsubstituted formamidines in water catalyzed β-cyclodextrin is described under neutral condition with quantitative yields of products.β-Cyclodextrin has been recovered and reused.

  4. Quadrupole collectivity in silicon isotopes approaching neutron number N=28

    Science.gov (United States)

    Campbell, C. M.; Aoi, N.; Bazin, D.; Bowen, M. D.; Brown, B. A.; Cook, J. M.; Dinca, D.-C.; Gade, A.; Glasmacher, T.; Horoi, M.; Kanno, S.; Motobayashi, T.; Riley, L. A.; Sagawa, H.; Sakurai, H.; Starosta, K.; Suzuki, H.; Takeuchi, S.; Terry, J. R.; Yoneda, K.; Zwahlen, H.

    2007-08-01

    Quadrupole deformation parameters, |β|, have been deduced for 36,38,40Si from measured inelastic proton-scattering cross sections. Due to the strong Z=14 subshell gap, low-lying quadrupole collectivity in these nuclei is attributed to the excitation of valence neutrons. Enhanced collectivity at N=26 indicates a reduced N=28 shell gap at large neutron excess in this chain of isotopes. Data are compared to large-scale shell-model calculations and prior Coulomb excitation measurements on 36,38Si.

  5. Russia`s atomic tsar: Viktor N. Mikhailov

    Energy Technology Data Exchange (ETDEWEB)

    Reams, C.A. [Los Alamos National Lab., NM (United States). Center for International Security Affairs

    1996-12-01

    Minatom (Ministry of Atomic Energy) was created to manage Russia`s nuclear weapons program in the age of disarmament. The ministry is responsible for the development, production, and maintenance of nuclear weapons, warhead dismantlement, the production of nuclear materials for weapons, the disposition of nuclear materials disassembled from warheads, the administration of Russia`s vast nuclear weapons complex, the development of policy for the future role of Russia`s nuclear complex and payment of employees entrusted with such tasks. Thus, Minatom is instrumental in the implementation of arms control, disarmament and nonproliferation agreements. The director of Minatom, Viktor N. Mikhailov, wields a great deal of power and influence over Russia`s nuclear infrastructure. He is an important player amidst efforts to reduce the threats posed by Russia`s decaying nuclear complex. There are certainly other personalities in the Russian government who influence Minatom; however, few affect the ministry as profoundly as Mikhailov. His ability to influence Russia`s nuclear complex has been clearly demonstrated by his policies in relation to the US purchase of Russian highly enriched uranium, the planned fissile material storage facility at Mayak, materials protection, control and accountability programs, and his unwavering determination to sell Iran commercial nuclear technology. Mikhailov has also been a key negotiator when dealing with the US on issues of transparency of weapons dismantlement and fissile material disposition, as well as the use of US threat reduction funds. His policies and concerns in these areas will affect the prospects for the successful negotiation and implementation of future nuclear threat reduction programs and agreements with Russia.

  6. N=1 SQCD-like theories with N-f massive flavors from AdS/CFT and beta functions

    NARCIS (Netherlands)

    Barranco, Alejandro; Pallante, Elisabetta; Russo, Jorge G.

    2011-01-01

    We study new supergravity solutions related to large-N-c N = 1 supersymmetric gauge field theories with a large number N-f of massive flavors. We use a recently proposed framework based on configurations with N-c color D5 branes and a distribution of N-f flavor D5 branes, governed by a function NfS(

  7. (1S,3S,4S-tert-Butyl N-[1-benzyl-3-hydroxy-5-phenyl-4-(picolinamidopentyl]carbamate

    Directory of Open Access Journals (Sweden)

    Jian-Feng Zheng

    2008-07-01

    Full Text Available The title compound, C29H35N3O4, was obtained by the reaction of (2S,4S,5S-tert-butyl N-(4-amino-1-benzyl-3-hydroxy-5-phenylpentylcarbamate and picolinic acid using oxalyl chloride as a chlorinating reagent to activate the carboxyl group. In the crystal structure there are two molecules in the asymmetric unit, which are aligned edge-to-face. In one molecule, the pyridyl ring forms a dihedral angle of 22.0 (1° with the phenyl ring of the terminal benzyl group and 14.3 (1° with the other phenyl ring; in the other molecule, the corresponding angles are 12.1 (1 and 10.6 (1°, respectively. The packing is stabilized by intermolecular hydrogen bonds and C—H...π interactions.

  8. Determinación de la condición saturada y seca superficialmente (s.s.s.) de agregados orgánicos para hormigón ligero

    OpenAIRE

    Jaime Salazar Contreras; Libia Esperanza Nieto

    2011-01-01

    Como parte del provecto de grado titulado "DOSIFICACION DE HORMIGONES LIGEROS UTILIZANDO COMO ARIDO LA CASCARILLA DE CAFE II PARTE", se desarrolló un procedimiento para determinar la condición saturada y seca superficialmente (S.S.S.) de la cascarilla de café debido a que no existe ninguna literatura técnica que establezca los pasos a seguir para hallar la condición s.s.s de agregados ligeros, como si la hay para los agregados tradicionales del hormigón. Puesto que los agregados orgánicos pre...

  9. Juan of Segovia’s Translation of the Qur’ān

    Directory of Open Access Journals (Sweden)

    Roth, Ulli

    2014-12-01

    Full Text Available John of Segovia (1393-1458 is together with Nicolaus Cusanus one of the most important theologians of the 15th century. His struggle for peace and consensus during the council of Basel culminated in his engagement for interreligious communication in the last years of his life. After the fall of Constantinople in 1453, he prepared a new approach towards the Islam. Not crusade, but interreligious communication based on thorough knowledge of the religion of the other should result in peace, either through converting the other or at least convincing him to stop warfare. Therefore John of Segovia initiated a new translation of the Qur’ān into Spanish, which he himself translated into Latin. This article outlines the history of this famous project and illustrates its main characteristics with examples taken from fragments of this first polyglot translation of the Qur’ān.Junto a Nicolás de Cusa, Juan de Segovia (1393-1458 fue uno de los teólogos más importantes del siglo XV. Sus esfuerzos por llegar a una paz y a un consenso durante el concilio de Basilea culminaron con un compromiso de comunicación interreligiosa en los últimos años de su vida. Después de la caída de Constantinopla en el año 1453, preparó un nuevo acercamiento hacia el Islam. Ya no se trataba de una cruzada, sino de realizar una comunicación entre religiones basada en un conocimiento profundo de la religión del otro, lo que creía que resultaría en una paz a través de la conversión del otro o, al menos, a través del convencimiento de que dejaría la guerra. Juan de Segovia comenzó así la tarea de traducir de nuevo el Corán al castellano, que él mismo había traducido al latín. Este artículo muestra la historia de este famoso proyecto ilustrando sus características más llamativas con ejemplos tomados de esta primera traducción políglota del Corán.

  10. An Algebraic Approach to Signaling Cascades with n Layers

    DEFF Research Database (Denmark)

    Feliu, Elisenda; Knudsen, Michael; Andersen, Lars Nørvang;

    2011-01-01

    Posttranslational modification of proteins is key in transmission of signals in cells. Many signaling pathways contain several layers of modification cycles that mediate and change the signal through the pathway. Here, we study a simple signaling cascade consisting of n layers of modification...

  11. Bis(N-benzyl-N-methyldithiocarbamato-κ2S,S′(pyridine-κNcadmium(II

    Directory of Open Access Journals (Sweden)

    Muhammad Ali Ehsan

    2016-01-01

    Full Text Available The title compound, [Cd(C9H10NS22(C5H5N], features a five-coordinate CdII atom, being coordinated by two nearly symmetrically chelating dithiocarbamate ligands and a pyridine N atom. The resulting NS4 donor set defines a distorted coordination geometry tending toward square pyramidal. In the molecular packing, centrosymmetric ten-membered {...HCNCS}2 synthons arise as a result of methylene-C—H...S interactions. These are connected into layers parallel to (10-2 via weak methyl-C—H...π(phenyl interactions.

  12. U.S. Southwest Border Security: An Operational Approach

    Science.gov (United States)

    2012-06-08

    are well positioned to profit from illicit trafficking, according to law enforcement reporting. For example, Barrio Azteca – the Texas prison gang...prison gang Barrio Azteca represents an example of a U.S. criminal gang that has been subsumed within a Mexico-based TCO. This criminal gang now serves...

  13. Dimenzionális szemlélet a névkutatásban. Általános kérdések és a családnévkutatás példája [The dimensional approach in Onomastics. General questions and the example of family-name research

    Directory of Open Access Journals (Sweden)

    Farkas, Tamás

    2014-12-01

    Full Text Available An essential characteristic of natural and modern languages and language use is variability and changeability. These features are connected to the basic existential dimensions of human beings and languages. These dimensions are those of time (historicity, space (spatiality and society (society and culture. Dimensional linguistics as an approach and research area, by considering and examining the above dimensions jointly, seeks to contribute to a better knowledge and understanding of several language phenomena. As a result of the fact that proper names, in comparison with common nouns, are strongly embedded in extralinguisitic reality, their examination should rely on this approach. This paper presents how typical it is to pay attention to the different dimensions in the analyses of the distinct types of names. The author explores the reasons for, the antecedents of, and the presence of this approach in Hungarian Onomastics, focusing on topics such as name history, name geography and socioonomastics as well as their connections and their possible dimensional linguistic examination. Examples are given from the earlier and contemporary literature in the field of Hungarian family-name research. The author argues that most questions in relation to Onomastics can only be discussed validly in the framework of macrolinguistics, using the methods of contextual linguistics.

  14. High-Speed Scalable Silicon-MoS2 P-N Heterojunction Photodetectors

    Science.gov (United States)

    Dhyani, Veerendra; Das, Samaresh

    2017-03-01

    Two-dimensional molybdenum disulfide (MoS2) is a promising material for ultrasensitive photodetector owing to its favourable band gap and high absorption coefficient. However, their commercial applications are limited by the lack of high quality p-n junction and large wafer scale fabrication process. A high speed Si/MoS2 p-n heterojunction photodetector with simple and CMOS compatible approach has been reported here. The large area MoS2 thin film on silicon platform has been synthesized by sulfurization of RF-sputtered MoO3 films. The fabricated molecular layers of MoS2 on silicon offers high responsivity up to 8.75 A/W (at 580 nm and 3 V bias) with ultra-fast response of 10 μsec (rise time). Transient measurements of Si/MoS2 heterojunction under the modulated light reveal that the devices can function up to 50 kHz. The Si/MoS2 heterojunction is found to be sensitive to broadband wavelengths ranging from visible to near-infrared light with maximum detectivity up to ≈1.4 × 1012 Jones (2 V bias). Reproducible low dark current and high responsivity from over 20 devices in the same wafer has been measured. Additionally, the MoS2/Si photodetectors exhibit excellent stability in ambient atmosphere.

  15. Primera adaptación del CDI-S a población española

    OpenAIRE

    2002-01-01

    En este trabajo se presenta la adaptación a población española del cuestionario Children’s Depresión Inventory en su versión abreviada (Children’s Depresión Inventory-Short; CDI-S, Kovacs, 1992). El CDI-S consta de 10 items que proceden del CDI más extenso (27 items) (Kovacs, 1992), que recogen los síntomas esenciales de la depresión infantil. Para la realización de esta investigación se ha contado con una muestra de 1.615 sujetos, 635 mujeres y 980 varones, con edades comprendidas ...

  16. Toward the laboratory identification of [O,N,S,S] isomers: Implications for biological NO chemistry

    Science.gov (United States)

    Ayari, Tarek; Jaidane, Nejm-Eddine; Al Mogren, Muneerah Mogren; Francisco, Joseph S.; Hochlaf, Majdi

    2016-06-01

    Benchmark ab initio calculations are performed to investigate the stable isomers of [O,N,S,S]. These computations are carried out using coupled cluster (RCCSD(T)) and explicitly correlated coupled cluster methods (RCCSD(T)-F12). In addition to the already known cis isomer of SSNO, nine other stable forms are predicted. The most stable isomer is cis-OSNS. Nine structures are chain bent-bent with relatively large dipole moments which make them detectable, as cis-SSNO, by infrared, far-infrared, and microwave spectroscopies. We found also a C2v isomer (NS2O). Since these species are strongly suggested to play an important role as intermediates during the bioactive reaction products of the NO/H2S interaction, the rotational and vibrational spectroscopic parameters are presented to help aid the in vivo identification and assignment of these spectra. Results from this work show that [O,N,S,S] may play key roles during nitric oxide transport and deliver in biological media, as well as, provide an explanation for the weak characteristic of disulfide bridges within proteins.

  17. Minimum S-T Cut of a Planar Undirected Network in O(n log2(n)) Time,

    Science.gov (United States)

    1980-01-01

    a minimum s-t cut of a planar undirected network [Gomory and Hu, 1961] and [ Itai and Shiloach, 1979] 2 has time 0(n log(n)) and the best previous...the same face) which efficiently implemented by [Gomory and Hu, 1961] and [ Itai and Shiloach, 1979] has time 0(n log(n)). Moreover, 0(n) executions...in time 0(Q (n)), where L = range(c). Note that this implies the 0(n log(n)) time minimum s-t cut algorithm of [Gomory and Hu, 1961] and [ Itai and

  18. Mobile Learning Approaches for U.S. Army Training

    Science.gov (United States)

    2010-08-01

    2010). Social networking sites also allow students to collaborate with each other, receive feedback on each other‟s work, share information and...questions and have discussions regarding the topics via blogs and restricted social networking sites . Instructors would need to comment on the blog...experiences in these roles via blogs and restricted social networking sites . Incorporating activities facilitated by smartphone technologies in POIs

  19. Russia’s Approach to Cyber Warfare (1Rev)

    Science.gov (United States)

    2017-03-01

    threat and an opportunity in this regard.  Russian military theorists generally do not use the terms cyber or cyberwarfare. Instead, they...Ukraine, Russia appeared to employ cyber as a conventional force enabler.  The Georgia and Ukraine conflicts also provided opportunities for Russia...Ministerstvo Vnutrennikh Del: MVD) focuses on cyber crime.14 For a brief period in the 1990s, Russia had a separate information security agency, the Federal

  20. China’s Development Approach Under Dual-gap Pressures

    Institute of Scientific and Technical Information of China (English)

    金碚

    2007-01-01

    In the late 1970s,China firmly resolved upon a path of re- form and opening up to the outside world under a heightened sense of crisis stemming from the tremendous gap between China and developed countries in terms of economic development.China chose to accelerate industrialization in order to narrow this gap, but the cost of doing so is reflected primarily in the multifaceted

  1. Working Capital Approaches and Firm’s Returns in Pakistan

    Directory of Open Access Journals (Sweden)

    Dr. Talat Afza

    2008-09-01

    Full Text Available This study investigates the relationship between the aggressive/conservative working capital policies for seventeen industrial groups of public limited companies listed at Karachi Stock Exchange for a period of 1998-2003. The ordinary least square regression model has been used to investigate into the relationship of working capital approaches and the returns of firms. The study found significant differences among their working capital investment and financing policies across different industries. Moreover, these significant differences are remarkably stable over the period of six years. The aggressive investment working capital policies are accompanied by aggressive working capital financing policies. Finally, we found a negative relationship between the profitability measures of firms and degree of aggressiveness of working capital investment and financing policies. The study would contribute a better understanding of working capital management policies in an emerging market like Pakistan.

  2. Towards safe robots approaching Asimov’s 1st law

    CERN Document Server

    Haddadin, Sami

    2014-01-01

    The vision of seamless human-robot interaction in our everyday life that allows for tight cooperation between human and robot has not become reality yet. However, the recent increase in technology maturity finally made it possible to realize systems of high integration, advanced sensorial capabilities and enhanced power to cross this barrier and merge living spaces of humans and robot workspaces to at least a certain extent. Together with the increasing industrial effort to realize first commercial service robotics products this makes it necessary to properly address one of the most fundamental questions of Human-Robot Interaction: How to ensure safety in human-robot coexistence? In this authoritative monograph, the essential question about the necessary requirements for a safe robot is addressed in depth and from various perspectives. The approach taken in this book focuses on the biomechanical level of injury assessment, addresses the physical evaluation of robot-human impacts, and isolates the major factor...

  3. Current approaches to the treatment of Parkinson’s disease

    Directory of Open Access Journals (Sweden)

    Joseph Jankovic

    2008-09-01

    Full Text Available Joseph Jankovic, L Giselle AguilarParkinson’s Disease Center and Movement Disorders Clinic, Department of Neurology, Baylor College of MedicineAbstract: Enormous progress has been made in the treatment of Parkinson’s disease (PD. As a result of advances in experimental therapeutics, many promising therapies for PD are emerging. Levodopa remains the most potent drug for controlling PD symptoms, yet is associated with significant complications such as the “wearing off” effect, levodopa-induced dyskinesias and other motor complications. Catechol-o-methyl-transferase inhibitors, dopamine agonists and nondopaminergic therapy are alternative modalities in the management of PD and may be used concomitantly with levodopa or one another. The neurosurgical treatment, focusing on deep brain stimulation, is reviewed briefly. Although this review has attempted to highlight the most recent advances in the treatment of PD, it is important to note that new treatments are not necessarily better than the established conventional therapy and that the treatment options must be individualized and tailored to the needs of each individual patient.Keywords: Parkinson’s disease, levodopa, medical treatment, pallidotomy, deep brain stimulation

  4. Molecular concepts of water splitting. Nature's approach

    Energy Technology Data Exchange (ETDEWEB)

    Cox, Nicholas; Lubitz, Wolfgang [Max-Planck-Institut fuer Chemische Energiekonversion, Muelheim an der Ruhr (Germany)

    2013-07-01

    Based on studies of natural systems, much has also been learned concerning the design principles required for biomimetic catalysis of water splitting and hydrogen evolution. In summary, these include use of abundant and inexpensive metals, the effective protection of the active sites in functional environments, repair/replacement of active components in case of damage, and the optimization of reaction rates. Biomimetic chemistry aims to mimic all these features; many labs are working toward this goal by developing new approaches in the design and synthesis of such systems, encompassing not only the catalytic center, but also smart matrices and assembly via self-organization. More stable catalysts that do not require self-repair may be obtained from fully artificial (inorganic) catalytic systems that are totally different from the biological ones and only apply some basic principles learned from nature. Metals other than Mn/Ca, Fe, and Ni could be used (e.g. Co) in new ligand spheres and other matrices. For light harvesting, charge separation/stabilization, and the effective coupling of the oxidizing/reducing equivalents to the redox catalysts, different methods have been proposed - for example, covalently linked molecular donor-acceptor systems, photo-voltaic devices, semiconductor-based systems, and photoactive metal complexes. The aim of all these approaches is to develop catalytic systems that split water with sunlight into hydrogen and oxygen while displaying high efficiency and long-term stability. Such a system - either biological, biomimetic, or bioinspired - has the potential to be used on a large scale to produce 'solar fuels' (e.g. hydrogen or secondary products thereof). (orig.)

  5. Europe’s fragmented approach towards cyber security

    Directory of Open Access Journals (Sweden)

    Karine e Silva

    2013-10-01

    Full Text Available The article proposes a deeper insight into the variety of concepts used to describe the term cyber security and the ways in which it has been used in recent years. It examines the role of three important actors involved in the internet governance arena, namely governments, private sector and civil society, and how they have influenced the debate. To this end, this paper analyses how different organisations, industry and societal actors see cyber security and how their interests influence the way the debate has evolved. The difficult balance between security and fundamental rights, although not new to governments and society, is of great importance for the internet. Citizens have engaged in favour of an open internet. However, little attention has been paid to the demands of citizens and how they may contribute to a concept of cyber security that brings society to its core. The paper states that for cyberspace to be open and supportive of innovation, the practice of cyber security needs to internalise the interests and perspectives of end users. A multistakeholder approach to cyber security asks a more participative environment where the rules of the game are decided with public participation and consultation, giving citizens the means and methods to influence the way cyber security is conceived and implemented. The paper concludes that although a citizen centric approach towards cyber security should be the way forward, this seems to be yet far from being included in the governmental agenda. The methodology applied in the paper was mainly focused on desk research.

  6. Grass species influence on plant N uptake - Determination of atmospheric N deposition to a semi-natural peat bog site using a 15N labelling approach

    Science.gov (United States)

    Hurkuck, Miriam; Brümmer, Christian; Spott, Oliver; Flessa, Heinz; Kutsch, Werner L.

    2014-05-01

    Large areas of natural peat bogs in Northwestern Germany have been converted to arable land and were subjected to draining and peat cutting in the past. The few protected peatland areas remaining are affected by high nitrogen (N) deposition. Our study site - a moderately drained raised bog - is surrounded by highly fertilized agricultural land and livestock production. In this study, we used a 15N pool dilution technique called 'Integrated Total Nitrogen Input' (ITNI) to quantify annual deposition of atmospheric N into biomonitoring pots over a two-year period. Since it considers direct N uptake by plants, it was expected to result in higher N input than conventional methods for determination of N deposition (e.g. micrometeorological approaches, bulk N samplers). Using Lolium multiflorum and Eriophorum vaginatum as monitor plants and low, medium and high levels of fertilization, we aimed to simulate increasing N deposition to planted pots and to allocate airborne N after its uptake by the soil-plant system in aboveground biomass, roots and soil. Increasing N fertilization was positively correlated with biomass production of Eriophorum vaginatum, whereas atmospheric plant N uptake decreased and highest airborne N input of 899.8 ± 67.4 µg N d-1 pot-1 was found for low N fertilization. In contrast, Lolium multiflorum showed a clear dependency of N supply on plant N uptake and was highest (688.7 ± 41.4 µg N d-1 pot-1) for highly fertilized vegetation pots. Our results suggest that grass species respond differently to increasing N input. While crop grasses such as Lolium multiflorum take up N according to N availability, species adopted to nutrient-limited conditions like Eriophorum vaginatum show N saturation effects with increasing N supply. Total airborne N input ranged from about 24 to 66 kg N ha-1 yr-1 dependent on the used indicator plant and the amount of added fertilizer. Parallel determination of atmospheric N deposition using a micrometeorological approach

  7. The influence of selection for protein stability on dN/dS estimations

    DEFF Research Database (Denmark)

    Dasmeh, Pouria; Serohijos, Adrian W. R.; Kepp, Kasper Planeta;

    2014-01-01

    from the neutral theory as a null model. However, from biophysical considerations, mutations have non-negligible effects on the biophysical properties of proteins such as folding stability. In this work, we investigated how stability affects the rate of protein evolution in phylogenetic trees by using...... simulations that combine explicit protein sequences with associated stability changes. We first simulated myoglobin evolution in phylogenetic trees with a biophysically realistic approach that accounts for 3D structural information and estimates of changes in stability upon mutation. We then compared...... stability where protein evolution is neutral. At low folding stabilities and under mutation-selection balance, we observe deviations from neutrality (per gene dN/dS > 1 and dN/dS positive selection detect statistically...

  8. Solution of N-S equations based on the quadtree cut cell method

    Institute of Scientific and Technical Information of China (English)

    KASE; Kiwamu

    2009-01-01

    With the characteristic of the quadtree data structure, a new mesh generation method, which adopts square meshes to decompose a background domain and a cut cell approach to express arbitrary boundaries, is proposed to keep the grids generated with a good orthogonality easily. The solution of N-S equations via finite volume method for this kind of unstructured meshes is derived. The mesh generator and N-S solver are implemented to study two benchmark cases, i.e. a lid driven flow within an inclined square and a natural convection heat transfer flow in a square duct with an inner hot circular face. The simulation results are in agreement with the benchmark values, verifying that the present methodology is valid and will be a strong tool for two-dimensional flow and heat transfer simulations, especially in the case of complex boundaries.

  9. catena-Poly[[(N,N-diethyldithiocarbamato-κ2S:S′phenylbismuth(III]-μ-chlorido

    Directory of Open Access Journals (Sweden)

    Liansheng Cui

    2008-11-01

    Full Text Available In the title compound, [Bi(C6H5(C5H10NS2Cl]n, the Bi atom is coordinated by two S atoms of the dithiocarbamate ligand, one C atom of the phenyl group and one Cl atom in a four-coordinated tetrahedral configuration. Molecules are linked by Cl atoms to form a zigzag chain extending in the c direction.

  10. Site-Specific Proteomics Approach for Study Protein S-Nitrosylation

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Miao; Hou, Jinxuan; Huang, Lin; Huang, Xin; Heibeck, Tyler H.; Zhao, Rui; Pasa-Tolic, Ljiljana; Smith, Richard D.; Li, Yan; Fu, Kai; Zhang, Zhixin; Hinrichs, Steven; Ding, Shi-Jian

    2010-09-01

    Here we present a novel and robust method for the identification of protein S-nitrosylation sites in complex protein mixtures. The approach utilizes the cysteinyl affinity resin to selectively enrich S-nitrosylated peptides reduced by ascorbate followed by nanoscale liquid chromatography tandem mass spectrometry. Two alkylation agents with different added masses were employed to differentiate the S-nitrosylation sites from the non-Snitrosylation sites. We applied this approach to MDA-MB-231 cells treated with Angeli’s salt, a nitric oxide donor that has been shown to inhibit breast tumor growth and angiogenesis. A total of 162 S-nitrosylation sites were identified and an S-nitrosylation motif was revealed in our study. The 162 sites are significantly more than the number reported by previous methods, demonstrating the efficiency of our approach. Our approach will further facilitate the functional study of protein S-nitrosylation in cellular processes and may reveal new therapeutic targets.

  11. Community Relations: DOD’s Approach for Using Resources Reflects Sound Management Principles

    Science.gov (United States)

    2016-09-01

    COMMUNITY RELATIONS DOD’s Approach for Using Resources Reflects Sound Management Principles Report to...Sound Management Principles What GAO Found The Department of Defense’s (DOD) approach for determining which community relations activities to...undertake reflects sound management principles —both for activities requested by non-DOD entities and for activities initiated by the department. DOD and

  12. Tamaños de muestra para estimar la estructura de tallas de las capturas de langostino colorado en la zona centro-norte de Chile: una aproximación a través de remuestreo Sample sizes for estimating the catch size distribution of squat lobster in north-central Chile: a resampling approach

    Directory of Open Access Journals (Sweden)

    Carlos Montenegro Silva

    2009-01-01

    Full Text Available Se analizó el desempeño de distintos tamaños de muestra para estimar la composición de tallas de las capturas del langostino colorado (Pleuroncodes monodon, a partir de un procedimiento de remuestreo computacional. Se seleccionaron datos recolectados en mayo de 2002 entre los 29°10'S y 32°10'S. A partir de éstos, se probaron siete escenarios de muestreo de viajes de pesca (1-7 viajes, 12 escenarios de número de ejemplares muestreados (25, 50,...300, cada 25 ejemplares y dos estrategias de muestreo de lances de pesca al interior de un viaje de pesca (censo de lances y muestreo sistemático. Se probó la combinación de todos estos escenarios, lo que permitió analizar el desempeño de 168 escenarios de tamaño de muestra para estimar la composición de tallas por sexo. Los resultados indicaron una disminución en el índice de error en la estimación de la distribución de frecuencia de tallas, conforme aumentó el número de viajes de pesca, con disminuciones progresivamente menores entre escenarios adyacentes. Del mismo modo, se verificó una disminución en el índice de error al aumentar el número de ejemplares muestreados, con mejoras marginales sobre los 175 ejemplares.The performances of different sample sizes for estimating the size distribution of squat lobster (Pleuroncodes monodon catches were analyzed using a computer resampling procedure. The data selected were gathered in May 2002 between 29°10'S and 32°10'S. These data were used to test seven sampling scenarios for fishing trips (1-7 trips, twelve scenarios of the number of individuals sampled per tow (25, 50,..., 300, and two within-trip sampling strategies (sampling all tows and systematic tow sampling. By testing the combination of all these scenarios, we were able to analyze the performance of 168 scenarios of sample size for estimating the composition of sizes by sex. The results indicate a lower error index for estimates of the size frequency distribution as the

  13. "La relación cooperativa-municipio en el ordenamiento jurídico cubano. Una aproximación a su realidad y a sus perspectivas ante el proceso de perfeccionamiento del modelo económico en el país" (The cooperative-municipality relationship in the Cuban legal system. An approach to its reality and perspectives faced with the improvement process of the country's economic model

    Directory of Open Access Journals (Sweden)

    Orisel Hernández Aguilar

    2013-01-01

    Full Text Available El objetivo de este trabajo es aportar algunas valoraciones entorno a la actual situación de la relación cooperativa - municipio dentro de losmarcos normativos en los que se desarrolla la cooperativa en Cuba, así comosus potencialidades ante una regulación legal que instrumente una ampliaciónde dichas prácticas como parte de la reestructuración del modelo económicoprevisto en los Lineamientos aprobados por el VI Congreso del Partido Comunistade Cuba y que regirán durante los próximos años las transformacionesemprendidas por el país.

  14. International Nuclear Security Situation And China’s Approach

    Institute of Scientific and Technical Information of China (English)

    Liu Chong

    2016-01-01

    Since 2010,the three Nuclear Security Summits have made a number of achievements,but the international nuclear security situation is still not relaxed.The rapid development of China’s domestic nuclear facilities and a large amount of nuclear and radioactive materials related to nuclear power,active international nuclear black market in China’s surrounding regions,rather serious domestic and international terrorist threats as well as the emerging technology development bring about new challenges to nuclear security.Facing the complicated and long-term nuclear security situation,China from the perspective of monitoring mechanism,laws and regulations system,technical capability-building and nuclear emergency preparedness,takes a series of effective measures to build the national nuclear security capacity,and strictly fulfills its international obligations,actively participates in upgrading the international nuclear non-proliferation regime and relevant international rules,and actively takes part in the Nuclear Security Summit process,strengthens bilateral cooperation on nuclear security with major countries especially the United States of America,and jointly organizes various training with International Atomic Energy Agency,which has made great contributions to upgrading the global nuclear security level.At the end of the Nuclear Security Summit process,China should continue to strengthen its domestic nuclear security capacity building,and promote the international community to treat the root causes and symptoms,adopt a comprehensive strategy,and work together,effectively prevent and dissolve the nuclear terrorist threats.

  15. The Legal Translator’s Approach to Texts

    Directory of Open Access Journals (Sweden)

    Radegundis Stolze

    2013-02-01

    Full Text Available Translation can be a basis for humanistic investigations when translation is seen as a personalized activity. The article describes, on the basis of hermeneutics, the specific perspective from which a translator may approach legal texts. Various aspects have to be considered in such texts, since the cultural and legal background is evident in linguistic aspects at the text level. Different text types are rooted in a specific legal system and fulfill their function within a special field of law. Comparative law does research on the differences in legal concepts, whereas translation uses this knowledge as a basis. Legal terminology presents various levels of abstraction and appears in texts besides general language words. Well-grounded understanding along with subject knowledge is necessary for legal translation. This should be combined with proficiency in writing in the legal style. The translator tries to make source cultural and legal aspects transparent for target readers, as translation is always a means of comprehension that furthers communication.

  16. Which countries pay more or less for their long term debt? A CART approach || ¿Qué países pagan más o menos por su deuda a largo plazo? Una aproximación a través de la metodología CART

    Directory of Open Access Journals (Sweden)

    González-Fernández, Marcos

    2016-06-01

    Full Text Available The objective of this paper is to classify a group of EMU countries according to the main determinants of long-term sovereign bond yields. We apply the Classification and Regression Tree method (CART. According to the findings, countries with lower inflation, a lower debt to GDP ratio, a lower average income tax rate, higher public debt maturity and higher IPI growth are placed in classification groups that have lower bond yields. These results confirm the hypothesis that countries with better macroeconomic and fiscal indicators have lower sovereign bond yields.|| El objetivo de este artículo es clasificar un grupo de países de la UME teniendo en cuenta los principales determinantes de los tipos a largo plazo de la deuda soberana. Se aplica la metodología basada en árboles de decisión. Según los resultados, los grupos de países que tienen menor inflación, deuda pública, tipo impositivo medio y mayor vencimiento de la deuda pública y crecimiento económico pagan menos por su deuda soberana a largo plazo. Se confirma la hipótesis de que los países que tienen los mejores indicadores macroeconómicos y fiscales son los que presentan menores costes en su deuda soberana.

  17. Proyecto instrumentos de gestión ambiental y participación empresarial en la produccións limpia

    OpenAIRE

    Ana Mora

    2005-01-01

    Presentación sobre los componentes del proyecto de los instrumentos de gestión ambiental y participación empresarial en la produccións limpia, los cuales contienen documentación del: manual para el funcionamiento, instalación e integración de los Comités Técnicos de Normas, reglamento de Premios Ambientales, reglamento de Auditorias Ambientales, Programas de Adecuación y Manejo Ambiental (PAMA¿s) y Registro de Auditores Ambientales.

  18. MEJORA DE LA CONVIVENCIA A TRAVÉS DE LA INVESTIGACIÓN-ACCIÓN PARTICIPATIVA

    Directory of Open Access Journals (Sweden)

    José A. Pareja Fernández de la Reguera

    2012-01-01

    Full Text Available A pesar del tiempo transcurrido y de las investigaciones que se han llevado a cabo en las últimas décadas, las concepciones sobre la forma de trabajar que aún perduran en muchas aulas son propias de una sociedad industrial, y pasada, en la que ya no estamos. Suele decirse que los sistemas educativos están condenados a ir con "retraso", sin embargo no siempre sería así si se tuvieran en cuenta algunos de los avances refrendados por aquellos trabajos de investigación cuya finalidad, última, es entender mejor el fenómeno educativo y mejorar la condiciones que sedan en el centro escolar para, de este modo, alcanzar los objetivos que desde él se proponen. Así el estudio de caso que presentamos, desarrollado como un proceso de investigación-acción (I/A en la etapa de Secundaria Obligatoria, se centra en conocer las demandas y necesidades de los agentes implicados en el centro escolar para, posteriormente, trabajar en aquello que consideran imprescindible a la hora de paliar las conductas disruptivas, fomentar un buen clima de aula y centro, y mejorar la eficacia en la labor del profesorado amén de las relaciones con el alumnado. En el artículo se describe la investigación llevada a cabo y se presentan algunos de los datos y conclusiones más relevantes al respecto. Por ejemplo, cómo es necesario que en el centro se incorporen profesionales externos que ayuden, y asesoren, al profesorado a la hora de trabajar con el alumnado temas como las habilidades sociales, o la gestión democrática de las normas.

  19. Coal miner's pneumoconiosis: epidemiological and experimental approaches

    Energy Technology Data Exchange (ETDEWEB)

    Amoudru, C.

    1983-01-01

    A historical review is presented showing the belated recognition of coal miner's pneumoconiosis as a discrete pathological state, a fact due to a lack of experimental pathological research. The distribution of the disease in France was studied. Its incidence has decreased among active miners, but the number of cases has increased as a result of increased longevity of miners. Physiological and pathological concepts of the disease are discussed, which has become a post-professional disease with delayed radiological symptoms, which frequently entails chronic cor pulmonale, and which varies in incidence from one mining region to another. Lines of ongoing experimental research, which take account of new work in epidemiology and in dust analysis as well as recent biological studies on man are summarized. 29 references.

  20. Electroencephalogram and Alzheimer’s Disease: Clinical and Research Approaches

    Directory of Open Access Journals (Sweden)

    Anthoula Tsolaki

    2014-01-01

    Full Text Available Alzheimer’s disease (AD is a neurodegenerative disorder that is characterized by cognitive deficits, problems in activities of daily living, and behavioral disturbances. Electroencephalogram (EEG has been demonstrated as a reliable tool in dementia research and diagnosis. The application of EEG in AD has a wide range of interest. EEG contributes to the differential diagnosis and the prognosis of the disease progression. Additionally such recordings can add important information related to the drug effectiveness. This review is prepared to form a knowledge platform for the project entitled “Cognitive Signal Processing Lab,” which is in progress in Information Technology Institute in Thessaloniki. The team tried to focus on the main research fields of AD via EEG and recent published studies.

  1. Fermionic T-duality of AdS n × S nS n ) × T m using IIA supergravity

    Science.gov (United States)

    Abbott, Michael C.; Murugan, Jeff; Tarrant, Justine

    2016-04-01

    We show that the string backgrounds {{AdS}}2× {S}2× {T}6 and {{AdS}}d× {S}d× {S}d× {T}10-3d (d=2,3) are self-dual under a series of bosonic and fermionic T-dualities. We do this using the fermionic Buscher rules derived by Berkovits and Maldacena, thus working at the level of the supergravity fields. This allows us to explicitly track the behaviour of the RR fields, from which we see that we need T-duality along some torus directions. For the {AdS}× S× S cases, which contain cosets of D{(2,1;α )}d-1, it is necessary to perform bosonic T-duality along some complexified Killing spinors in one of the spheres.

  2. Bolzano`s Approach to the Paradoxes of Infinity: Implications for Teaching

    Science.gov (United States)

    Waldegg, Guillermina

    2005-08-01

    In this paper we analyze excerpts of Paradoxes of the Infinite, the posthumous work of Bernard Bolzano (1781-1848), in order to show that Georg Cantor‘s (1845-1918) approach to the problem of defining actual mathematical infinity is not the most natural. In fact, Bolzano‘s approach to the paradoxes of infinity is more intuitive, while remaining internally coherent. Bolzano‘s approach, however, had limitations. We discuss implications for teaching, which include a better understanding of the responses of students to situations involving actual mathematical infinity, for it is possible to draw a kind of parallel between these responses and Bolzano‘s reasoning.

  3. Bis(μ2-N-methyl-N-phenyldithiocarbamato-κ3S,S′:S;κ3S:S,S′-bis[(N-methyl-N-phenyldithiocarbamato-κ2S,S′cadmium]: crystal structure and Hirshfeld surface analysis

    Directory of Open Access Journals (Sweden)

    Siti Aisyah Nabilah Suwardi

    2017-03-01

    Full Text Available The title compound, [Cd2(C8H8NS24], is a centrosymmetric dimer with both chelating and μ2-tridentate dithiocarbamate ligands. The resulting S5 donor set defines a CdII coordination geometry intermediate between square-pyramidal and trigonal–bipyramidal, but tending towards the former. The packing features C—H...S and C—H...π interactions, which generate a three-dimensional network. The influence of these interactions, along with intra-dimer π–π interactions between chelate rings, has been investigated by an analysis of the Hirshfeld surface.

  4. Neural networks approach v/s Algorithmic approach : A study through pattern recognition

    Directory of Open Access Journals (Sweden)

    Namrata Aneja

    2011-12-01

    Full Text Available There is a great scope of expansion in the field of Neural Network, as it can be viewed as massivelyparallel computing systems consisting of an extremely large number of simple processors with manyinterconnections. NN models attempt to use some organizational principles in a weighted directedgraphs in which nodes are artificial neurons and directed edges are connections between neuron outputsand neuron inputs. The main characteristic of neural network is that they have the ability to learncomplex non- linear input output relationships. A single artificial neuron is a simulation of a neuron(basic human brain cell and scientists have tried to emulate the neuron in a form of artificial neuroncalled perceptron. Pattern recognition is one of the areas where the neural approach has beensuccessfully tried. This study is concerned to see the journey of pattern recognition from algorithmicapproach to neural network approach.

  5. Laparoscopic repair of Morgagni′s hernia: An innovative approach

    Directory of Open Access Journals (Sweden)

    Rasik S Shah

    2015-01-01

    Full Text Available Aim: To review our experience of laparoscopic repair of Morgagni′s hernia (MH using transfascial sutures. Materials and Methods: This is a retrospective review of patients presenting to the first author with the diagnosis of MH over a 15-year period. The variables analyzed included demographic data, clinical presentation, and operative details. Results: In all there were five male with a median age of 2 years. They were asymptomatic and MH was detected incidentally by observing an air-filled density in the right cardiophrenic angle on plain X-ray of the chest. Computed tomography (CT confirmed the diagnosis in all patients. All patients underwent laparoscopic repair of MH using transfascial sutures. The average operative time was 75 min. Oral feeding was started 6 h after surgery and patients were discharged on either 3 rd or 4 th postoperative day. Postoperative follow-up X-ray confirmed the intact repair. Conclusions: Laparoscopic repair of MH using transfascial sutures is an easy and effective solution. Multiple horizontal mattress sutures taking full thickness of abdominal wall muscles with the edge of the diaphragm leads to a strong repair. As sutures are tied extracorporeally, the technique is easily reproducible.

  6. A Twistor Approach to One-Loop Amplitudes in N=1 Supersymmetric Yang-Mills Theory

    CERN Document Server

    Bedford, J; Spence, B; Travaglini, G; Bedford, James; Brandhuber, Andreas; Spence, Bill; Travaglini, Gabriele

    2004-01-01

    We extend the twistor string theory inspired formalism introduced in hep-th/0407214 for calculating loop amplitudes in N=4 super Yang-Mills theory to the case of N=1 (and N=2) super Yang-Mills. Our approach yields a novel representation of the gauge theory amplitudes as dispersion integrals, which are surprisingly simple to evaluate. As an application we calculate one-loop maximally helicity violating (MHV) scattering amplitudes with an arbitrary number of external legs. The result we obtain agrees precisely with the expressions for the N=1 MHV amplitudes derived previously by Bern, Dixon, Dunbar and Kosower using the cut-constructibility approach.

  7. Light baryon magnetic moments and N -> Delta gamma transition in a Lorentz covariant chiral quark approach

    CERN Document Server

    Faessler, A; Holstein, Barry R; Lyubovitskij, V E; Nicmorus, D; Pumsa-ard, K; Faessler, Amand; Gutsche, Thomas; Holstein, Barry R.; Lyubovitskij, Valery E.; Nicmorus, Diana; Pumsa-ard, Kem

    2006-01-01

    We calculate magnetic moments of light baryons and N -> Delta gamma transition characteristics using a manifestly Lorentz covariant chiral quark approach for the study of baryons as bound states of constituent quarks dressed by a cloud of pseudoscalar mesons.

  8. Riesz $s$-equilibrium measures on $d$-rectifiable sets as $s$ approaches $d$

    CERN Document Server

    Calef, M T

    2008-01-01

    Let $A$ be a compact set in ${\\mathbb R}^p$ of Hausdorff dimension $d$. For $s\\in(0,d)$, the Riesz $s$-equilibrium measure $\\mu^s$ is the unique Borel probability measure with support in $A$ that minimizes

  9. Russia’s New Irredentist Foreign Policy Approach & Energy Card

    Directory of Open Access Journals (Sweden)

    İsmail KÖSE

    2015-12-01

    Full Text Available Soon after Industrial Revolution fossil energy resources became extremely one of the irrevocable essentials of humankind. Nowadays, use of fossil energy resources paved the way of several problems. Throughout last two hundred years of human history disagreements to share energy resources led dramatic conflicts and wars broke out. Notably WWII and Cold War were a kind of proxy clashes over energy resources. In 1991 the long lasting Cold War came to an end yet neither energy disputes nor conflicts related to the sharing of energy resources have not ended. Starting with Industrial Revolution so far oil and coal are were unmatched basic energy sources to run the engines of industry. Especially after 1980’s hitherto natural gas and shale gas gained a new status in the energy need of humanity. Because both are more effective, clean and environment friendly. Beside shale gas, Europe and Turkey do not have natural gas reserves nowadays border neighborhood of Russian Federation has rich reserves. In other words Russian Federation is between rich reserves owing Central Asian countries and importer European countries. This fact led Russia to use energy card as a tool of foreign policy. Especially after the collapse of SU, the successor state Russia has not stopped intervening domestic affairs of post-communist countries. While intervening domestic affairs of former Iron-Curtain countries Russia uses numerous excuses such as to protect the rights of Russian originated people, to save its former citizens’ lives despite the fact nobody asked such a protection. Russia also argues that it has cultural and territorial rights in former Iron-Curtain countries. This kind of foreign policy aspects in international relations are called “irredentism” and European states could not force Russia to stop such conflict escalating policies. European dependency on Russian natural gas and energy problems one way or another affects European foreign policy priorities on

  10. Higher education student´s approaches to learning according to their perception of the context of course and classroom

    Directory of Open Access Journals (Sweden)

    Javier Goikoetxea Piérola

    2014-05-01

    Full Text Available The objective of this research was to analyze the relationship between the perception of teaching and learning classroom contexts and perception of course context with approaches to learning for college students. These influences are contrasted by degree, campus and courses. The sample is composed by 524 students of first and second year of Infant and Primary Education, Nursing and Polytechnics of Alava and Guipuzcoa campus. Used scales are the R-SPQ-2F (Biggs, Kember y Leung, 2001 to measure the student´s approaches to learning and the subscales of general Questionnaire of Teaching´s and Learning’s Strategies (TS-LSQ (San Fabián, Argós, Goikoetxea, 2009; Goikoetxea, Aramendi, Bujan, Rekalde y Ros, 2010 to measure the classroom´s context and current context. The study served to confirm the importance of two contextual variables poorly studied until now, the classroom context and the context of course, and its relations with the learning approach of university students. The classroom context is a variable that differentiates between degrees and also is related to significant variations with deep and surface approaches of students. The variable context of course is manifested as a specific variable of degree: the most significant differences for this variable are between the same students when they are in first or second year of career.

  11. Climate-driven exceedance of total (wet + dry) nitrogen (N) + sulfur (S) deposition to forest soil over the conterminous U.S

    Science.gov (United States)

    Sun, Jian; Fu, Joshua S.; Lynch, Jason A.; Huang, Kan; Gao, Yang

    2017-06-01

    Nitrogen (N) and sulfur (S) depositions are much mitigated over the conterminous U.S. (CONUS) but deposition exceedance still exists on forest soil. In addition, the empirical approach is usually used but only provides a spatially constant critical load (CL). Therefore, the CL derived from steady-state mass balance equation is used to study the CL exceedance on forest soil over the CONUS. The multimodel mean (MMM) of global climate-chemistry models in 2000s indicates that total (wet + dry) N deposition alone over 10.32% of forest soil exceeds the CL, but a higher percent (30.16%) is observed by the N + S deposition, which highlights the necessity of considering S deposition. In 2050s, less CL-exceeded forest soil is projected and the exceedance amount is lower as well, mainly attributed to the strong reduction of projected NOX and SO2 emissions. By first projecting the future CL due to the climate change, the CL exceedance could further decrease as the air temperature is projected to increase rapidly and lead to higher CL in the future. The CL exceedance by N deposition alone is likely to be dominated by NOy in 2000s but NHX in 2050s because of the enhanced NH3 emission. Moreover, both in 2000s and 2050s, using the CL generated by different aggregation methods can cause up to 33 times difference between the corresponding CL exceedance. This suggests that several regions are under the marginal threat of either N or N + S deposition and different CL can influence the results significantly.

  12. Fermionic T-Duality of $AdS_n \\times S^n (\\times S^n) \\times T^m$ using IIA Supergravity

    CERN Document Server

    Abbott, Michael C; Murugan, Jeff

    2015-01-01

    We show that the string backgrounds AdS2 x S2 x T6 and AdSd x Sd x Sd x T{10 - 3d} (d = 2, 3) are self-dual under a series of bosonic and fermionic T-dualities. We do this using the fermionic Buscher rules derived by Berkovits and Maldacena, thus working at the level of the supergravity fields. This allows us to explicitly track the behaviour of the RR fields, from which we see that we need T-duality along some torus directions. For the AdS x S x S cases, which contain cosets of D(2,1;alpha), it is necessary to perform bosonic T-duality along some complexified Killing spinors in one of the spheres.

  13. Poly[[μ3-N,N′-bis(3-pyridylmethylthiourea-κ3N:N′:S]iodidocopper(I

    Directory of Open Access Journals (Sweden)

    Shi-Shen Zhang

    2008-11-01

    Full Text Available In the title coordination polymer, [CuI(C13H14N4S]n, the CuI atom is coordinated by two N atoms from two N,N′-bis(3-pyridylmethylthiourea ligands, as well as by the S atom of a third ligand and an I atom to confer a distorted tetrahedral coordination at the metal centre. The coordination bonds give rise to a layer structure parallel to (010.

  14. Chiral observables and S-duality in N = 2* U(N) gauge theories

    CERN Document Server

    Ashok, S K; Dell'Aquila, E; Frau, M; Lerda, A; Moskovic, M; Raman, M

    2016-01-01

    We study N = 2* theories with gauge group U(N) and use equivariant localization to calculate the quantum expectation values of the simplest chiral ring elements. These are expressed as an expansion in the mass of the adjoint hypermultiplet, with coefficients given by quasi-modular forms of the S-duality group. Under the action of this group, we construct combinations of chiral ring elements that transform as modular forms of definite weight. As an independent check, we confirm these results by comparing the spectral curves of the associated Hitchin system and the elliptic Calogero-Moser system. We also propose an exact and compact expression for the 1-instanton contribution to the expectation value of the chiral ring elements.

  15. Reflexões sobre a constitucionalidade das cotas raciais em Universidades Públicas no Brasil: referências internacionais e os desafios pós-julgamento das cotas La cuestión de la constitucionalidad de las cuotas raciales en universidades públicas en Brasil: puntos de referencia internacionales y los retos después de la decisión de las cuotas Constitutionality regarding racial quotas in public universities in Brazil: international approach and post-trial'challenges

    Directory of Open Access Journals (Sweden)

    Fátima Bayma

    2012-06-01

    Full Text Available Este artigo analisa questões relacionadas à constitucionalidade das cotas raciais no Brasil apresentando diversas contribuições e posicionamentos divergentes sobre o assunto. Conceitua ações afirmativas e prestações positivas. Aborda a origem das ações afirmativas nos Estados Unidos e na França e as limitações em aplicar os respectivos modelos à realidade brasileira, apresenta considerações sobre o julgamento da constitucionalidade das cotas pelos ministros do Supremo Tribunal Federal e os principais desafios a serem enfrentados pelas universidades.En este artículo se examinan cuestiones relativas a la constitucionalidad de las cuotas raciales en Brasil y ofrece distintas contribuciones y posiciones divergentes sobre el tema. Conceptualiza la acción afirmativa y la prestación positiva. Explica los orígenes de la acción afirmativa en los Estados Unidos y Francia y las limitaciones en la aplicación de su modelo a la realidad brasileña. Presenta consideraciones sobre la decisión de la constitucionalidad de las cuotas declarada por los ministros de la Corte Suprema y los principales retos que deben ser enfrentados por las universidades.This article analyses questions related to the constitutionality of racial quotas in Brazil, showing various divergent positions about this topic. It deals with the origin of affirmative actions in the United States, in France and also the limitations to apply these experiences into the Brazilian reality. It also presents some brief remarks on the trial of the constitutionality of quotas held by ministers of the Brazilian Supreme Court and the main challenges that must be faced by universities.

  16. Possible resonance effect of axionic dark matter in S/N/S Josephson junctions

    CERN Document Server

    Beck, Christian

    2013-01-01

    We provide theoretical arguments that dark matter axions from the galactic halo that pass through the earth may generate a small observable signal in resonant S/N/S Josephson junctions. The corresponding interaction process is based on uniqueness of the gauge-invariant axion Josephson phase angle modulo 2 pi and is predicted to produce a small Shapiro step-like feature without externally applied microwave radiation when the Josephson frequency resonates with the axion mass. A resonance signal of so far unknown origin observed in [C. Hoffmann et al. PRB 70, 180503(R) (2004)] is consistent with our theory and can be interpreted in terms of an axion mass of 0.11 meV and a local galactic axionic dark matter density of 0.05 GeV/cm^3. We discuss future experimental checks to confirm the dark-matter nature of the observed signal.

  17. Disilicon complexes with two hexacoordinate Si atoms: paddlewheel-shaped isomers with (ClN4 )Si-Si(S4 Cl) and (ClN2 S2 )Si-Si(S2 N2 Cl) skeletons.

    Science.gov (United States)

    Wagler, Jörg; Brendler, Erica; Heine, Thomas; Zhechkov, Lyuben

    2013-10-11

    The reaction of 1-methyl-3-trimethylsilylimidazoline-2-thione with hexachlorodisilane proceeds toward substitution of four of the disilane Cl atoms during the formation of disilicon complexes with two neighboring hexacoordinate Si atoms. The N,S-bidentate methimazolide moieties adopt a buttressing role, thus forming paddlewheel-shaped complexes of the type ClSi(μ-mt)4 SiCl (mt=methimazolyl). Most interestingly, three isomers (i.e., with (ClN4 )SiSi(S4 Cl), (ClN3 S)SiSi(S3 NCl), and (ClN2 S2 )SiSi(S2 N2 Cl) skeletons as so-called (4,0), (3,1), and cis-(2,2) paddlewheels) were detected in solution by using (29) Si NMR spectroscopic analysis. Two of these isomers could be isolated as crystalline solids, thus allowing their molecular structures to be analyzed by using X-ray diffraction studies. In accord with time-dependent NMR spectroscopy, computational analyses proved the cis-(2,2) isomer with a (ClN2 S2 )SiSi(S2 N2 Cl) skeleton to be the most stable. The compounds presented herein are the first examples of crystallographically evidenced disilicon complexes with two SiSi-bonded octahedrally coordinated Si atoms and representatives of the still scarcely explored class of Si coordination compounds with sulfur donor atoms.

  18. Aproximación a la obra de Picasso a través de la representación del ejercicio físico. De Málaga a Guernica=An approach to Picasso's work through his representation of physical exercise. From Málaga to Guernica

    Directory of Open Access Journals (Sweden)

    Teresa González Aja

    2013-03-01

    Full Text Available Una de las constantes en la obra de Pablo Ruiz Picasso es el tratamiento, diverso, del ejerciciofísico e incluso, en algunas ocasiones, del juego y del deporte. Además, muestra diversasinfluencias de épocas y estilos artísticos y de algunos de sus pintores favoritos, a la hora deinterpretar algunas de las actividades físico-deportivas que aparecen en su obra. Este textopresenta el estudio de tales actividades -bañistas, caballos, boxeadores, toros, incluso algúnautorretrato-en la primera etapa del pintor que aquí se concluye con la llegada de la GuerraCivil.------------------------------------------------------------------------------One of the constant features in Pablo Ruiz Picasso's work is the treatment of physical exerciseand occasionally even of sport and play. Besides, when interpreting some of the sport andphysical activities appearing in his work he is greatly influenced by various artistic periods andstyles and by some of his favourite painters. This text provides a study of such activities -bathers, horses, boxers, bulls, even some self-portraits- in the painter's first period, finishingwith the outbreak of the Civil War.

  19. Enhanced photocatalytic activity of ZnS nanoparticles loaded with MoS2 nanoflakes by self-assembly approach

    Science.gov (United States)

    Vattikuti, S. V. Prabhakar; Byon, Chan; Jeon, Sora

    2016-12-01

    A hybrid consisting of ZnS nanoparticles supported on layered MoS2-ZnS was synthesized by a hydrothermal method based on self-assembly technique without using a template. XRD, SEM-EDX, TEM, HR-TEM, TG-DTA, XPS, N2 adsorption-desorption, and UV-Vis spectroscopies were used to characterize the structural features, morphology, and composition of the MoS2-ZnS hybrid. The results show that the MoS2-ZnS hybrid is mainly ZnS nanoparticles on layered MoS2 with a thickness of ca. 5-20 nm. The combination of the MoS2 and ZnS hybrid structure is beneficial for enhancing the photocatalytic degradation of rhodamine B (RhB) under visible light irradiation. A possible photoreaction mechanism of the MoS2-ZnS hybrid in the degradation is proposed. The photoexcited electrons from the ZnS could easily transfer to the conduction band of MoS2, thus decreasing the recombination of photoinduced carriers and enabling the degradation of RhB under visible light irradiation.

  20. No more time to stay 'single' in the detection of Anisakis pegreffii, A. simplex (s. s.) and hybridization events between them: a multi-marker nuclear genotyping approach.

    Science.gov (United States)

    Mattiucci, S; Acerra, V; Paoletti, M; Cipriani, P; Levsen, A; Webb, S C; Canestrelli, D; Nascetti, G

    2016-07-01

    A multi-marker nuclear genotyping approach was performed on larval and adult specimens of Anisakis spp. (N = 689) collected from fish and cetaceans in allopatric and sympatric areas of the two species Anisakis pegreffii and Anisakis simplex (s. s.), in order to: (1) identify specimens belonging to the parental taxa by using nuclear markers (allozymes loci) and sequence analysis of a new diagnostic nuclear DNA locus (i.e. partial sequence of the EF1 α-1 nDNA region) and (2) recognize hybrid categories. According to the Bayesian clustering algorithms, based on those markers, most of the individuals (N = 678) were identified as the parental species [i.e. A. pegreffii or A. simplex (s. s.)], whereas a smaller portion (N = 11) were recognized as F1 hybrids. Discordant results were obtained when using the polymerase chain reaction-restriction fragment length polymorphisms (PCR-RFLPs) of the internal transcribed spacer (ITS) ribosomal DNA (rDNA) on the same specimens, which indicated the occurrence of a large number of 'hybrids' both in sympatry and allopatry. These findings raise the question of possible misidentification of specimens belonging to the two parental Anisakis and their hybrid categories derived from the application of that single marker (i.e. PCR-RFLPs analysis of the ITS of rDNA). Finally, Bayesian clustering, using allozymes and EF1 α-1 nDNA markers, has demonstrated that hybridization between A. pegreffii and A. simplex (s. s.) is a contemporary phenomenon in sympatric areas, while no introgressive hybridization takes place between the two species.

  1. Valoración TABLEMAC S.A.

    OpenAIRE

    Grimaldo Cárdenas, Angélica Jaeneth; Madero Gutiérrez, Melly Jacqueline

    2014-01-01

    La recomendación de compra se sustenta en el alto porcentaje de valoración estimado en el 40%, pasando $7,30 a $10,25 por acción; las recientes inversiones realizadas por la empresa y la proyección de crecimiento del sector de la construcción junto con su plan de innovación tecnológica posicionan a TABLEMAC como una empresa líder en el sector maderero en Colombia,lo que a su vez ha venido generando un incremento de sus ventas al exterior y la entrada a nuevos mercados; como consecuencia de lo...

  2. Tüketicilerin Coğrafi İşaretli Ürün Algısı ve Daha Fazla Fiyat Ödeme İsteği: Yapısal Eşitlik Modellemesi Yaklaşımı(Consumers' Perception of Product with Geographical Indication and Willingness to Pay More: A Structural Equation Modeling Approach

    Directory of Open Access Journals (Sweden)

    İsmail Tamer TOKLU

    2016-04-01

    Full Text Available Bir fikri ve sınai mülkiyet hakkı olarak coğrafi işaret, belirli bir nitelik, ün veya diğer özellikleriyle kökeninin bulunduğu bir yöre, alan, bölge veya ülke ile özdeşleşmiş bir ürünü gösteren işaretlerdir. Bu çalışmanın amacı tüketicilerin coğrafi işaretli ürünlere olan algılarını ve bu ürünlere daha fazla ödeme eğilimlerini ölçmektir. Bu amaç için oluşturulan modelin verileri kolayda örnekleme yöntemiyle, tüketicilerle yüz yüze yapılan anket çalışmasından elde edilmiştir. Elde edilen veriler En Küçük Kısmi Kareler (PLS yöntemi ile analiz edilmiştir. Araştırmadan elde edilen bulgulara göre; kültür ve gelenek, kalite ve güvenilirlik coğrafi işaretli ürün algısını etkilerken, coğrafi işaretli ürün algısı da daha fazla fiyat ödeme eğilimini etkilemektedir. Diğer taraftan, ekonomik desteğin coğrafi işaretli ürün algısını etkilemediği bulunmuştur. Bu çalışmanın sonuçları rekabet avantajı elde etmek isteyen yerel üreticiler için etkili bir pazarlama stratejisine karar vermeleri açısından değerli ve önemli bilgiler sunmaktadır. As an intellectual property right, geographical indications are signs showing an exclusive quality, celebrity or other attributes specified with a territory, area, region or country of its origin. This study aims to evaluate consumers' perceptions toward products with geographical indication and their willingness to pay a premium price for these types of products. The data of the model proposed for this aim were collected by convenience sampling method with face to face questionnaire. PLS (Partial Least Squares Method was used to analyze the data. The main findings of the study are as follows, 'culture and tradition' and 'quality and safety' affect the consumers' perceptions towards geographical indication. This perception also affects the willingness to pay more for products with geographical indication. On the other

  3. A Modernist Approach to T.S Eliot’s The Love Song of J. Alfred Prufrock

    OpenAIRE

    Samet Güven

    2015-01-01

    A Modernist Approach to T.S Eliot’s “The Love Song of J. Alfred Prufrock" Abstract  T.S. Eliot’s The Love Song of J. Alfred Prufrock carries the characteristics of modernist poetry such as objective correlative, fragmentation, free verse and irregular rhyming. It suggests a direct break with English romantic poets such as Coleridge and Wordsworth (Levis 75). Sara Thorne states that unlike the Romantic poets, Eliot attempts to convey the essence of life; and the content represents actu...

  4. A Third-Quantized Approach to the Large-N Field Models

    CERN Document Server

    Maslov, V P

    1998-01-01

    Large-N field systems are considered from an unusual point of view. The Hamiltonian is presented in a third-quantized form analogously to the second-quantized formulation of the quantum theory of many particles. The semiclassical approximation is applied to the third-quantized Hamiltonian. The advantages of this approach in comparison with 1/N-expansion are discussed.

  5. Nitrate Removal in Two Relict Oxbow Urban Wetlands: A 15N Mass-balance Approach

    Science.gov (United States)

    A 15N-tracer method was used to quantify nitrogen (N) removal processes in two relict oxbow wetlands located adjacent to the Minebank Run restored stream reach in Baltimore County (Maryland, USA) during summer 2009 and early spring 2010. A mass-balance approach was used to determ...

  6. Resummation and S-duality in N=4 SYM

    CERN Document Server

    Beem, Christopher; Sen, Ashoke; van Rees, Balt C

    2013-01-01

    We consider the problem of resumming the perturbative expansions for anomalous dimensions of low twist, non-BPS operators in four dimensional N=4 supersymmetric Yang-Mills theories. The requirement of S-duality invariance imposes considerable restrictions on any such resummation. We introduce several prescriptions that produce interpolating functions on the upper half plane that are compatible with a subgroup of the full duality group. These lead to predictions for the anomalous dimensions at all points in the fundamental domain of the complex gauge coupling, and in particular at the duality-invariant values \\tau=i and \\tau=exp(i\\pi/3). For low-rank gauge groups, the predictions are compatible with the bounds derived by conformal bootstrap methods for these anomalous dimensions; within numerical errors, they are in good agreement with the conjecture that said bounds are saturated at a duality-invariant point. We also find that the anomalous dimensions of the lowest twist operators lie within an extremely narr...

  7. Influence of N. Gogol’s and M. Saltykov-Shchedrin’s Satire on Michail Bulgakov’s Prose

    Directory of Open Access Journals (Sweden)

    Alexander Philippovich Petrenko

    2016-11-01

    Full Text Available The article is concerned with the study of literary relationships between the satire of the famous 20th-century Russian writer M. Bulgakov and the works by the Russian classics of the 19th century – N.V. Gogol and M.Y. Saltykov-Shchedrin. The article describes Gogol’s and Saltykov-Shchedrin’s influence on Bulgakov’s satirical poetics, especially in the period of his development as a writer. Special attention is given to the device of grotesque and the motives of mechanicalness and lifelessness, forming the artistic worlds of the writers under study. The authors note that the technical progress and the rapid development of mechanized production in the 20th century, combined with the satirical motive of primitivism, characteristic of Russian literature, left an imprint on the nature of Bulgakov’s grotesque. The writers at issue are united by such common feature of the satirical poetics as turning to fantasy, hyperbole, ‘strange and queer things’. The article shows the way Bulgakov perceived and embodied the principles of Gogol’s and Shchedrin’s world perception through the comic mixing of absurd, ghostly and real. Bulgakov’s way of seeing the world is characterized as ‘delirious reality’. At the same time, Bulgakov, as well as his literary teachers in the sphere of satire, showed oddness and divergence as regularity, while the comicality of fantasy in his works finally turns into the drama of reality. Keywords: satire, laughter, grotesque, mysticism, fantasy, zoomorphic metaphors

  8. Fermentación sólida del banano de rechazo, en la obtención de alimentos.

    OpenAIRE

    Álvarez, Mario

    1999-01-01

    Ecuador, es por excelencia un país agrícola. Dentro de la amplia gama de productos que se cultivan en el país, las frutas tropicales son quizás uno de los más interesantes y potenciales recursos disponibles. Entre ellos el banano sigue ocupando un papel importantísimo en la producción y exportación agrícola ecuatoriana.

  9. 第二类Stirling数S(n,n-k)的一个一般计算公式%A General Formula for the Stirling Number of the Second Type S(n,n-k)

    Institute of Scientific and Technical Information of China (English)

    黄凤英

    2009-01-01

    第二类Stirling数定义为"把n元集划分为k个块的分拆数",表示为S(n,k). 在前人对S(n,k)这个著名的组合数的研究成果的基础上,利用第二类Stirling数的定义, 结合容斥原理得到了S(n,n-k)的一个一般计算公式.

  10. Analyze of Implementation Character Education Policy Base to SMK N 5 Malang Student’s

    Directory of Open Access Journals (Sweden)

    Rudy Setiawan

    2016-07-01

    Full Text Available The aims of this observation to decide the analysis of policy implementation of character education in SMK N 5 Malang, includes 1 understanding and describing the implementation of Character Education Policy in SMK N 5 Malang, 2 understanding the constraints of the implementation of character education in SMK N 5 Malang, 3 finding out the school’s strategies to overcome the obstacles in the implementation of education character in SMK N 5 Malang. The study was conducted over four months using a qualitative approach. Data was collected through interviews, observations, and review documents related to this research.. Techniques of data analysis by the presentation of data, data reduction and drawing conclusions. The data analysis begins by describing the findings during the study, then discussed objectively supported by theoretical studies. The conclusion of this study is the policy implementation of education character in SMK N 5 Malang run well although there are some constraints. The obstacles are including a lack of professionalism and spirit "Among" of the teachers, the negative effects of globalization to the students, and lack of role of parents and society in the policy implementation of character education. And to overcome these obstacles, do the strategies implemented by 1 increasing the professionalism and spirit betwen the teacher, 2 implementing the methods of character education with the "mengerti, merasa, melakukan”.

  11. Optimized Modulo Multiplier Based On R.N.S

    Directory of Open Access Journals (Sweden)

    Manjula.S.Doddamane

    2013-07-01

    Full Text Available To implement long and repetitive multiplications of cryptographic and signal processing algorithmwe often adopt residue number system. In this paper a new low power and low modulo multiplier foe well established {2n-1,2n,2n+1} based is proposed .Radix-8 Booth encoding technique is used in the proposed modulo 2n-1 and modulo 2n+1 multipliers. In the proposed modulo 2n-1 multiplier, the number of partial products is lowered to [n/3]+1. For modulo 2n+1 multiplication ,the aggregate bias due to the hard multiple and the modulo reduced partial product generation is composed of multiplier dependent dynamic bias and multiplier-independent static bias .In the proposed modulo 2n+1 multiplier , the number of partial products is lowered to n/3+6 .For different modulo 2n-1 and modulo 2n+1 multiplier our proposed modulo multiplier consumes less area and has minimum power dissipation over radix-4 Booth encoded and non-encoded modulo multiplier

  12. Photoelectron spectroscopy and density functional calculations of C(n)S(m)(-) (n = 2-7; m = 1, 2) clusters.

    Science.gov (United States)

    Xu, Xi-Ling; Deng, Xiao-Jiao; Xu, Hong-Guang; Zheng, Wei-Jun

    2015-12-14

    CnSm(-) (n = 2-7; m = 1, 2) clusters were investigated by using photoelectron spectroscopy combined with density functional theory calculations. We found that the vertical detachment energies of both CnS(-) and CnS2(-) (n = 2-7) clusters exhibit a strong odd-even alternation with an increasing number of carbon atoms: the VDEs of even-n clusters are higher than those of adjacent odd-n clusters. The most stable structures of the anionic and neutral CnS (n = 2-7) clusters are linear with the S atom locating at one end of the carbon chain except that the structure of C3S(-) is slightly bent. The ground state isomers of the anionic and neutral CnS2 (n = 2-7) clusters are all linear structures with two S atoms locating at two ends of the carbon chain. The electron affinities of the neutral CnS (n = 2, 4-7) and CnS2 (n = 2-7) clusters are determined based on the experimental adiabatic detachment energies of the corresponding anion species, because the most stable structures of the neutral clusters are similar to those of the corresponding anions.

  13. Approach

    Directory of Open Access Journals (Sweden)

    Guido Pinto Aguirre

    2008-01-01

    Full Text Available El propósito de este documento es investigar y re-estimar los efectos de los patrones de lactancia, salud y estado nutricional de la mujer y consumo de energía sobre la duración del retorno de la fertilidad de postparto (es decir, retorno de la menstruación de postparto utilizando toda la información relevante en el estudio longitudinal del Instituto de Nutrición de Centroamérica y Panamá y un procedimiento de estimacións adecuado (modelos de riesgo. Los datos utilizados provienen del Estudio Longitudinal llevado a cabo en Guatemala entre 1967 y 1979. En este artículo se utiliza un modelo de riesgo con varios estados que reconoce diferentes caminos y estados en el proceso del retorno de la fertilidad de postparto. El modelo descansa en la existencia de cinco estados (lactancia total, lactancia parcial, destete, mortalidad infantil y menstruación. También incluye de manera explícita nutrición maternal y consumo de energía de la mujer como elementos estratégicos del modelo. El estudio encontró que los efectos de los patrones de lactancia, nutrición de la madre y patrones de trabajo de la mujer (consumo de energía sobre la fertilidad en las áreas rurales de Guatemala son fuertes y significativos. La contribución de este artículo es mostrar que la aplicación de los modelos de riesgo con múltiples estados proporciona estimados que son consistentes con hipótesis que relacionan patrones de lactancia, estado nutricional maternal y estresores maternales externos a procesos que aceleran (desaceleran el retorno de ciclos menstruales normales.

  14. Electrical transport and optical properties of the incommensurate intergrowth compounds (SbS)(1.15)(TiS2)(n) with n=1 and 2

    NARCIS (Netherlands)

    Ren, Y; Ruscher, CH; Haas, C; Wiegers, GA

    2002-01-01

    The in-plane electrical transport and optical properties of the incommensurate intergrowth compounds (SbS)(1.15)(TiS2)(n) with n = 1, 2 have been investigated by means of measurements of the electrical resistivity, Hall coefficient and thermopower in the temperature range from 4.2 to 350 K, and by o

  15. Aproximación a la Violencia Política en el País Vasco y Perspectivas de una Justicia Restaurativa para Euskadi (Approaching Political Violence in the Basque Country and Perspective of a Restorative Justice in Euskadi

    Directory of Open Access Journals (Sweden)

    Iñigo Bullain

    2014-07-01

    Full Text Available This work has two objectives. One is to offer an explanation on the political violence that the Basque Country has suffer and experienced during almost 50 years through the study of the so-called Basque National Liberation Movement. The other aim is to reflect on the difficulties to develop Restorative Justice after the end of ETA. This article is in big debt with a former work of the author: “Revolucionarismo Patriótico” (Tecnos 2011 where the origin, ideology, strategy and organization of the BNLM are analyzed. A group based on the ideology of revolutionary patriotism, which has evolved a politico-military strategy and organized itself through dozens of different associations into a national liberation movement. This article adds an extensive bibliography on political violence. Este trabajo tiene un doble objetivo. De un lado ofrecer una explicación a la violencia política que el País Vasco ha padecido durante cerca de 50 años a través del estudio del denominado Movimiento de Liberación Nacional Vasco. Por otra parte, reflexionar sobre las dificultades para desarrollar una justicia restaurativa tras el final de ETA. El artículo es deudor de una obra anterior del autor: “Revolucionarismo Patriótico” (Tecnos 2011 donde se analiza el origen, ideología, estrategia y organización del MLNV. Un grupo de ideología patriótico-revolucionaria que ha desarrollado una estrategia político-militar y se ha organizado a través de decenas de grupos en forma de movimiento de liberación nacional. Este artículo incorpora una extensa bibliografía sobre violencia política.

  16. Black hole's quantum N-portrait

    Energy Technology Data Exchange (ETDEWEB)

    Dvali, G. [Arnold Sommerfeld Center for Theoretical Physics, Department fuer Physik, Ludwig-Maximilians-Universitaet Muenchen, Theresienstr. 37, 80333 Muenchen (Germany); Max-Planck-Institut fuer Physik, Foehringer Ring 6, 80805 Muenchen (Germany); CERN, Theory Division, 1211 Geneva 23 (Switzerland); CCPP, Department of Physics, New York University, 4 Washington Place, New York, NY 10003 (United States); Gomez, C. [Instituto de Fisica Teorica UAM-CSIC, C-XVI, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain)

    2013-07-15

    We establish a quantum measure of classicality in the form of the occupation number, N, of gravitons in a gravitational field. This allows us to view classical background geometries as quantum Bose-condensates with large occupation numbers of soft gravitons. We show that among all possible sources of a given physical length, N is maximized by the black hole and coincides with its entropy. The emerging quantum mechanical picture of a black hole is surprisingly simple and fully parameterized by N. The black hole is a leaky bound-state in form of a cold Bose-condensate of N weakly-interacting soft gravitons of wave-length {radical}N times the Planck length and of quantum interaction strength 1/N. Such a bound-state exists for an arbitrary N. This picture provides a simple quantum description of the phenomena of Hawking radiation, Bekenstein entropy as well as of non-Wilsonian UV-self-completion of Einstein gravity. We show that Hawking radiation is nothing but a quantum depletion of the graviton Bose-condensate, which despite the zero temperature of the condensate produces a thermal spectrum of temperature T = 1/({radical}N). The Bekenstein entropy originates from the exponentially growing with N number of quantum states. Finally, our quantum picture allows to understand classicalization of deep-UV gravitational scattering as 2 {yields} N transition. We point out some fundamental similarities between the black holes and solitons, such as a t'Hooft-Polyakov monopole. Both objects represent Bose-condensates of N soft bosons of wavelength {radical}N and interaction strength 1/N. In short, the semi-classical black hole physics is 1/N-coupled large-N quantum physics. (Copyright copyright 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  17. (4-Hydr-oxy-2-oxidobenzaldehyde thio-semicarbazonato-κO,N,S)(1,10-phenanthroline-κN,N')zinc(II) dimethyl sulfoxide disolvate monohydrate.

    Science.gov (United States)

    Tan, Kong Wai; Ng, Chew Hee; Maah, Mohd Jamil; Ng, Seik Weng

    2008-12-13

    The Zn(II) atom in the title compound, [Zn(C(8)H(7)N(3)O(2)S)(C(12)H(8)N(2))]·2C(2)H(6)OS·H(2)O, is N,N'-chelated by the N-heterocycle and N,O,S-chelated by the deprotonated Schiff base in a distorted square-pyramidal enviroment. Hydrogen bonds link the mononuclear mol-ecule, the water and the dimethyl sulfoxide (DMSO) mol-ecules into a linear chain motif. One DMSO mol-ecule is disordered over two positions in respect of the S atom in an approximate 1:1 ratio.

  18. Geometry on the unit tangent bundle T1S2n+1%单位切丛T1S2n+1上的几何

    Institute of Scientific and Technical Information of China (English)

    杨小娟; 赵秋

    2007-01-01

    本文给出一般矢丛上Sasaki度量的局部表示,特别得到单位切丛T1S2n+1上Sasaki度量的表达式.利用Grassmann流形上的示性类定义了T1S2n+1上的calibration,证明了L2n+1是T1S2n+1上体积极小的子流形.采用切丛TS2n+1上的不同联络,证明了Hopf向量场是S2n+1上体积最小的单位向量场.

  19. �We are Judean�! The Sayings Gospel Q�s redactional approach to the Law

    Directory of Open Access Journals (Sweden)

    M Cromhout

    2006-09-01

    Full Text Available This article is focussed on Q� s treatment of the Law and what it can tell us about the Q community� s Judean ethnic identity. It is argued that part of the reason for the incorporation of the main redaction in Q (here Kloppenborg� s Q2 + Q3 was to defend the Judean ethnic identity of the Q people.� This becomes evident in its conservative approach to the Law as opposed to that of the formative stratum where the Law was freely reconstructed. Q� s approach to the Law is also informed by its Moses/New Exodus typology encountered in the various strata.

  20. Determinación de la condición saturada y seca superficialmente (S.S.S. de agregados orgánicos para hormigón ligero

    Directory of Open Access Journals (Sweden)

    Jaime Salazar Contreras

    2011-02-01

    Full Text Available Como parte del provecto de grado titulado "DOSIFICACION DE HORMIGONES LIGEROS UTILIZANDO COMO ARIDO LA CASCARILLA DE CAFE II PARTE", se desarrolló un procedimiento para determinar la condición saturada y seca superficialmente (S.S.S. de la cascarilla de café debido a que no existe ninguna literatura técnica que establezca los pasos a seguir para hallar la condición s.s.s de agregados ligeros, como si la hay para los agregados tradicionales del hormigón. Puesto que los agregados orgánicos presentan una elevada absorción, se hace necesario determinar un procedimiento de ensaya que permita obtener la condición s.s.s., del agregado de una manera precisa y más confiable que la obtenida mediante la inspección visual, procedimiento éste utilizado hasta ahora en el diseño de mezclas para los agregados ligeros de naturaleza orgánica. El ensayo consiste básicamente en someter a un proceso de secado una muestra de cascarilla saturada hasta que desaparece el agua libre contenida en ella, hecho que se manifiesta por la variación de la temperatura del bulbo húmedo medida por un termómetro colocado en el centro de la muestra; la humedad determinada en este momento corresponde a la condición s.s.s. de la cascarilla, valor éste que se utilizará posteriormente para determinar las propiedades físicas requeridas para el diseño y en especial para establecer con gran aproximación la relación agua-cemento (A/c parámetro fundamental que rige la resistencia del hormigón. Estos ensayos se realizaron en el laboratorio de Ingeniería Agrícola de la Universidad Nacional de Bogotá

  1. Understanding the Global Special Operations Network’s Value to Counterterrorism: A Balanced Scorecard Approach

    Science.gov (United States)

    2013-12-01

    VALUE TO COUNTERTERRORISM: A BALANCED SCORECARD APPROACH By: Michael Ameche, and Shaun Carrizales December 2013 Advisors...AND SUBTITLE UNDERSTANDING THE GLOBAL SPECIAL OPERATIONS NETWORK’S VALUE TO COUNTERTERRORISM: A BALANCED SCORECARD APPROACH 5. FUNDING NUMBERS...implementation widely accepted in the private sector called the Balanced Scorecard . We introduce the natural unit of policy options created as a measure

  2. Newton’s method an updated approach of Kantorovich’s theory

    CERN Document Server

    Ezquerro Fernández, José Antonio

    2017-01-01

    This book shows the importance of studying semilocal convergence in iterative methods through Newton's method and addresses the most important aspects of the Kantorovich's theory including implicated studies. Kantorovich's theory for Newton's method used techniques of functional analysis to prove the semilocal convergence of the method by means of the well-known majorant principle. To gain a deeper understanding of these techniques the authors return to the beginning and present a deep-detailed approach of Kantorovich's theory for Newton's method, where they include old results, for a historical perspective and for comparisons with new results, refine old results, and prove their most relevant results, where alternative approaches leading to new sufficient semilocal convergence criteria for Newton's method are given. The book contains many numerical examples involving nonlinear integral equations, two boundary value problems and systems of nonlinear equations related to numerous physical phenomena. The book i...

  3. ¿Qué factores explican la pobreza multidimensional en España? Una aproximación a través de los modelos de ecuaciones estructurales || What Factors Explain the Multimensional Poverty in Spain? An Approach by Means of Structural Equation Models

    Directory of Open Access Journals (Sweden)

    Poza Lara, Carlos

    2011-01-01

    Full Text Available La finalidad de este estudio es presentar los factores más importantes que explican la pobreza multidimensional en España, destacando las interrelaciones entre los propios elementos explicativos, con el ánimo de potenciar los efectos de la política económica contra la pobreza. Para ello, se ha construido un modelo de ecuaciones estructurales utilizando la muestra ampliada del Panel de Hogares de la Unión Europea del año 2000. El nivel de educación y el empleo parecen ser los constructos más determinantes. Concretamente,el nivel de formación y el tipo de contrato son las variables con mayor poder explicativo sobre la pobreza multidimensional. || The aim of this study is to present the most important factors that explain multidimensional poverty in Spain, highlighting the relationships between the explanatory elements themselves in the spirit of enhancing the effects of poverty policy. For this purpose, we have designed a Structural Equation Model using the enlarged sample of Household Panel European Union in 2000. Education and employment seem to be the most determining latent construct. In particular, the level of education and the type of employment contract are the most important variables to explain the multidimensional poverty.

  4. Optimization of p-GaN/InGaN/n-GaN Double Heterojunction p-i-n Solar Cell for High Efficiency: Simulation Approach

    Directory of Open Access Journals (Sweden)

    Aniruddha Singh Kushwaha

    2014-01-01

    Full Text Available We have conducted numerical simulation of p-GaN/In0.12Ga0.88N/n-GaN, p-i-n double heterojunction solar cell. The doping density, individual layer thickness, and contact pattern of the device are investigated under solar irradiance of AM1.5 for optimized performance of solar cell. The optimized solar cell characteristic parameters for cell area of 1  × 1 mm2 are open circuit voltage of 2.26 V, short circuit current density of 3.31 mA/cm2, fill factor of 84.6%, and efficiency of 6.43% with interdigitated grid pattern.

  5. Optimization of p-GaN/InGaN/n-GaN Double Heterojunction p-i-n Solar Cell for High Efficiency: Simulation Approach

    OpenAIRE

    Aniruddha Singh Kushwaha; Pramila Mahala; Chenna Dhanavantri

    2014-01-01

    We have conducted numerical simulation of p-GaN/In0.12Ga0.88N/n-GaN, p-i-n double heterojunction solar cell. The doping density, individual layer thickness, and contact pattern of the device are investigated under solar irradiance of AM1.5 for optimized performance of solar cell. The optimized solar cell characteristic parameters for cell area of 1  × 1 mm2 are open circuit voltage of 2.26 V, short circuit current density of 3.31 mA/cm2, fill factor of 84.6%, and efficiency of 6.43% with inte...

  6. Copper-Catalyzed N-Arylation of Amides Using (S-N-Methylpyrrolidine-2-carboxylate as the Ligand

    Directory of Open Access Journals (Sweden)

    Dong-Sheng Ma

    2010-03-01

    Full Text Available (S-N-methylpyrrolidine-2-carboxylate, a derivative of natural L-proline, was found to be an efficient ligand for the copper-catalyzed Goldberg-type N-arylation of amides with aryl halides under mild conditions. A variety of N-arylamides were synthesized in good to high yields.

  7. Oclusión transitoria de comunicación interauricular en el síndrome de Lutembacher

    OpenAIRE

    Alejandro E. Contreras; Eduardo J. Brenna; Alejandro R. Peirone

    2011-01-01

    Se describe una paciente de 82 años de edad, con síntomas de insuficiencia cardíaca avanzada e hipertensión arterial pulmonar. Un ecocardiograma transtorácico mostró una comunicación interauricular tipo ostium secundum y estenosis valvular mitral concomitante (síndrome de Lutembacher). La valoración ecocardiográfica de la enfermedad mitral se vio dificultada por la presencia del defecto interauricular. Se realizó test de oclusión percutánea transitoria de la comunicación interauricular, obser...

  8. Modelos de determinación de tasas de interés

    OpenAIRE

    Solano Brenes, Ana Isabel

    2015-01-01

    Existe una relación positiva entre los tipos de interés nominales y la inflación, si los tipos de interés reales1 se mantienen constantes a largo plazo, las expectativas de inflación ajustan la tasa de inflación corriente. La variación continua del crecimiento monetario aumenta en la misma proporción el tipo de interés nominal. Los modelos que tratan de explicar el comportamiento de las tasas de interés consideran la relación de la inflación con los tipos de interés. La relación entre la infl...

  9. De números y más números: identificación, control y representación documental

    Directory of Open Access Journals (Sweden)

    Victor Julián Cid Carmona

    2015-06-01

    Full Text Available El uso de números en los documentos, independientemente de utilizarse como parte del contenido propiamente dicho de las obras —para expresar cantidades, fórmulas, medidas, posiciones, valores, etc.— tiene un variado conjunto de aplicaciones según propósitos claramente definidos. El presente texto tiene como finalidad hacer una breve descripción de la manera en que se emplean diversos códigos numéricos en los procesos de producción, control e identificación de impresos. Para especificar el tipo de datos a que nos referiremos, se incluye en primer lugar una propuesta de tipificación en razón del origen de los números. A continuación, se abordan los casos de números que van impresos en los libros y después, aquellos que se anotan por los poseedores de los mismos. En tercer lugar, se incluyen códigos numéricos que permiten identificar a los documentos en repertorios impresos o en catálogos bibliográficos en línea.

  10. Efeito da omissão de N, NI, Mo, Co e S sobre os teores de N e S em feijoeiro

    Directory of Open Access Journals (Sweden)

    J. M. Jasmim

    2002-12-01

    Full Text Available Foi avaliado o efeito da omissão de N, Ni, Mo, Co e S sobre os teores de N e S em feijoeiros (Phaseolus vulgaris inoculados e não inoculados com Rhizobium, em casa de vegetação. O experimento foi realizado em um esquema fatorial com dois tipos de solo (Neossolo Flúvico, dois níveis de inoculação (com e sem, combinados com seis adubações: (a Completo (N, P, K, Ni, Mo, Co e S; (b sem N; (c sem Ni; (d sem Co; (e sem Mo; (f sem S. O delineamento experimental foi inteiramente casualizado com três repetições. Foram fornecidos 126 mg kg-1 de N (parcelados no plantio, aos 10 e 25 dias da emergência - DAE, 248 mg kg-1 de P, 117 de K e 48 de S, aplicados no solo, e 10, 250 e 10 mg L-1 de Ni, Mo e Co, respectivamente, aplicados via foliar aos nove DAE. A colheita foi efetuada aos 35 DAE, separando-se a folha indicadora das demais. A adubação nitrogenada aumentou o crescimento das plantas, indicando serem os solos deficientes em N, bem como reduziu os teores foliares de N e S. A omissão dos demais nutrientes não alterou o crescimento das plantas nem o teor de N foliar, mas a omissão de S reduziu, como esperado, o teor de S foliar.

  11. Equivariant fields in an S U (N ) gauge theory with new spontaneously generated fuzzy extra dimensions

    Science.gov (United States)

    Kürkçüoǧlu, S.; Ünal, G.

    2016-05-01

    We find new spontaneously generated fuzzy extra dimensions emerging from a certain deformation of N =4 supersymmetric Yang-Mills theory with cubic soft supersymmetry breaking and mass deformation terms. First, we determine a particular four-dimensional fuzzy vacuum that may be expressed in terms of a direct sum of product of two fuzzy spheres, and denote it in short as SF2 Int×SF2 Int . The direct sum structure of the vacuum is clearly revealed by a suitable splitting of the scalar fields in the model in a manner that generalizes our approach in [Phys. Rev. D 92, 025022 (2015)]. Fluctuations around this vacuum have the structure of gauge fields over SF2 Int×SF2 Int, and this enables us to conjecture the spontaneous broken model as an effective U (n ) (n family of fuzzy vacua is determined by giving a systematic treatment for the splitting of the scalar fields, and it is made manifest that suitable projections of these vacuum solutions yield all higher winding number fuzzy monopole sectors. We observe that the vacuum configuration SF2 Int×SF2 Int identifies with the bosonic part of the product of two fuzzy superspheres with O S P (2 ,2 )×O S P (2 ,2 ) supersymmetry and elaborate on this unexpected and intriguing feature.

  12. (S,R,Rp-N,N-Dimethyl-1-{2-[(1-phenylethylaminomethyl]ferrocenyl}ethanamine

    Directory of Open Access Journals (Sweden)

    Xiu-Li Zheng

    2009-04-01

    Full Text Available The title chiral ferrocene compound, [Fe(C5H5(C18H25N2], contains one planar and two central chiral centers. It is of interest with respect to asymmetric catalysis. The absolute configuration of the planar chirality is Rp at the ferrocene group and those of the two C chiral centers are R at the CH carbon of the ethanamine unit and S at the CH carbon of the phenylethylamino substituent. In the ferrocenyl unit, the cyclopentadienyl (Cp rings are planar, with maximum deviations of 0.002 (2 Å for the substituted and 0.008 (3 Å for the unsubstituted Cp ring. The dihedral angle between the ring planes is 2.12 (15° and the rings are twisted slightly from an eclipsed conformation by 7.06–7.60°.

  13. Aproximación a la web semántica desde la perspectiva de la Documentación Approaching the Semantic Web from a Documentation perspective

    Directory of Open Access Journals (Sweden)

    Eduardo Peis

    2007-12-01

    Full Text Available El proyecto web semántica se perfila cada vez más como una nueva alternativa que viene a resolver algunos de los problemas que presenta el actual modelo de Web. Este trabajo pretende, mediante el planteamiento de ejemplos sencillos y desde el punto de vista del "profesional de la información", hacer una aproximación a las tecnologías básicas que permiten definir una infraestructura semántica sobre la cual desarrollar los sistemas de información del futuro. Además, se analiza el impacto que puede suponer la implantación de estas tecnologías en las metodologías y técnicas de trabajo de una disciplina como la documentación. Por último se discute brevemente la viabilidad de este nuevo modelo.The Semantic Web is arising as a new alternative that could solve some of the problems of the actual Web model. By means of simple examples from an information professional perspective, this paper attempts to approach the basic technologies that will define the semantic infrastructure for developing the information systems of the future. Furthermore, the impact that the implementation of these technologies may have on work methodologies and techniques of a research area such as Information Science, is analyzed. Finally, the viability of this new model is briefly discussed.

  14. Hydrogen polysulfide (H2S n ) signaling along with hydrogen sulfide (H2S) and nitric oxide (NO).

    Science.gov (United States)

    Kimura, Hideo

    2016-11-01

    Hydrogen sulfide (H2S) is a physiological mediator with various roles, including neuro-modulation, vascular tone regulation, and cytoprotection against ischemia-reperfusion injury, angiogenesis, and oxygen sensing. Hydrogen polysulfide (H2S n ), which possesses a higher number of sulfur atoms than H2S, recently emerged as a potential signaling molecule that regulates the activity of ion channels, a tumor suppressor, transcription factors, and protein kinases. Some of the previously reported effects of H2S are now attributed to the more potent H2S n . H2S n is produced by 3-mercaptopyruvate sulfurtransferase (3MST) from 3-mercaptopyruvate (3MP) and is generated by the chemical interaction of H2S with nitric oxide (NO). H2S n sulfhydrates (sulfurates) cysteine residues of target proteins and modifies their activity, whereas H2S sulfurates oxidized cysteine residues as well as reduces cysteine disulfide bonds. This review focuses on the recent progress made in studies concerning the production and physiological roles of H2S n and H2S.

  15. Resultados imediatos da correção cirúrgica de escoliose idiopática do adolescente por via posterior com instrumentação após liberação anterior por videotoracoscopia Resultados inmediatos de la corrección quirúrgica de escoliosis idiopática del adolescente por vía posterior con instrumentación después de liberación anterior por videotoracoscopia Short term results of surgical correction of adolescents' idiopathic scoliosis by posterior approach instrumentation following videothoracoscopic anterior release

    Directory of Open Access Journals (Sweden)

    Eduardo Barros Puertas

    2009-12-01

    Full Text Available OBJETIVO: descrever os resultados imediatos da aplicação da liberação anterior por videotoracoscopia, seguida de instrumentação por via posterior para correção cirúrgica da escoliose idiopática do adolescente. MÉTODOS: foram selecionados 20 pacientes, no período de agosto de 1989 a maio de 2001, com escoliose idiopática do adolescente, padrão de curva torácica direita rígida, King III. Inicialmente realizou-se a abordagem pela via anterior com liberação por videotoracoscopia e depois a via posterior para correção e fixação com instrumental de Hartshill, em um mesmo tempo cirúrgico. RESULTADOS: todos os procedimentos foram completados com sucesso com videotoracoscopia, sem necessidade de conversão para toracotomia. A média de idade dos pacientes foi de 15,7 anos (12 a 21 anos. Em relação aos dias de internação, obteve-se um tempo médio de permanência de 9,45 dias (5 a 26 dias. A média entre os valores angulares foi, no pré-operatório, de 66,25º Cobb (48º a 92º Cobb, e no pós-operatório, de 31,2º Cobb (15º a 45º Cobb. Como complicações, quatro pacientes tiveram nevralgia intercostal (20% e um caso de atelectasia (5%. CONCLUSÕES: a discectomia por videotoracoscopia é um método efetivo e seguro para tornar flexíveis as curvas escolióticas rígidas. No entanto, trata-se de um procedimento tecnicamente difícil, que requer treinamento árduo e prolongado, com curva de aprendizado extensa.OBJETIVO: describir los resultados inmediatos de la aplicación de la liberación anterior por videotoracoscopia, seguida de instrumentación por vía posterior para corrección quirúrgica de escoliosis idiopática del adolescente. MÉTODOS: fueron seleccionados 20 pacientes, en el periodo de agosto de 1989 a mayo de 2001, con escoliosis idiopática del adolescente, con un padrón de curva torácica derecha rígida, King III. Inicialmente se realizó un abordaje por la vía anterior con liberación por

  16. Recurrence approach and higher rank cubic algebras for the N-dimensional superintegrable systems

    Science.gov (United States)

    Fazlul Hoque, Md; Marquette, Ian; Zhang, Yao-Zhong

    2016-03-01

    By applying the recurrence approach and coupling constant metamorphosis, we construct higher order integrals of motion for the Stackel equivalents of the N-dimensional superintegrable Kepler-Coulomb model with non-central terms and the double singular oscillators of type (n,N-n). We show how the integrals of motion generate higher rank cubic algebra C(3)\\oplus {L}1\\oplus {L}2 with structure constants involving Casimir operators of the Lie algebras L 1 and L 2. The realizations of the cubic algebras in terms of deformed oscillators enable us to construct finite dimensional unitary representations and derive the degenerate energy spectra of the corresponding superintegrable systems.

  17. A novel surfactant S-benzoyl-N,N-diethyldithiocarbamate synthesis and its flotation performance to galena

    Science.gov (United States)

    Ma, Xin; Hu, Yuan; Zhong, Hong; Wang, Shuai; Liu, Guangyi; Zhao, Gang

    2016-03-01

    In this paper, a novel dithiocarbamate compound, S-benzoyl-N,N-diethyldithiocarbamate (BEDTC), was synthesized via one-pot reaction of diethylamine, carbon disulfide, sodium hydroxide and benzoyl chloride using abundant carbon disulfide as a solvent. Its flotation performance and adsorption mechanism on the galena was first investigated by flotation tests, adsorption quantity measurements, FTIR spectra, X-ray photoelectron spectra (XPS) and density functional theory (DFT) calculation. The flotation results illustrated that BEDTC exhibited stronger collecting power than the conventional sulphide collectors such as sodium diethyl dithiocarbamate (SEDTC) and sodium isobutyl xanthate (SIBX) and superior selectivity for galena against sphalerite. The adsorption data demonstrated that the adsorption affinity of BEDTC to galena was stronger than that of SEDTC and SIBX, and the preferable pH range for BEDTC adsorption on galena surfaces was 6-10. The results of FTIR spectra and XPS indicated that the interaction of BEDTC with galena may be dominated by the chemical adsorption, which was further confirmed by DFT calculation. BEDTC probably acted as a bidentate ligand, bonding with lead through the thiol sulfur and carbonyl oxygen atoms to form two distinct adsorption geometries, one with the same Pb atom to form a six-membered ring complex, and the other with two different Pb atoms to form a "bullet" shape complex.

  18. Corrections to $n_s$ and $n_t$ from high scale physics

    CERN Document Server

    Broy, Benedict J

    2016-01-01

    When modelling inflaton fluctuations as a free quantum scalar field, the initial vacuum is conventionally imposed at the infinite past. This is called the Bunch-Davies (BD) vacuum. If however an asymptotically Minkowskian past does not exist, this becomes inconsistent. We derive corrections to the scalar spectral index $n_s$ and the tensor tilt $n_t$ descending from arbitrary mixed states or from explicit non-BD initial conditions. The former may stem from some pre-inflationary background and can redshift away whereas the latter are induced by a timelike hypersurface parametrising a physical cut-off. In both cases, we find that corrections scale in parts or fully as $\\mathcal O(\\epsilon)$ where $\\epsilon$ is the first slow-roll parameter. The precise observational footprint is hence dependent on the model driving inflation. Further, we show how the inflationary consistency relation is altered. We thus provide an analytic handle on possible high scale or pre-inflationary physics.

  19. $\\psi(2S)$ and $\\Upsilon(3S)$ hadroproduction in the parton reggeization approach: yield, polarization, and the role of fragmentation

    CERN Document Server

    Kniehl, B A; Saleev, V A

    2016-01-01

    The hadroproduction of the radially excited heavy-quarkonium states $\\psi(2S)$ and $\\Upsilon(3S)$ at high energies is studied in the parton reggeization approach and the factorization formalism of nonrelativistic QCD at lowest order in the strong-coupling constant $\\alpha_s$ and the relative heavy-quark velocity $v$. A satisfactory description of the $\\psi(2S)$ transverse-momentum ($p_T$) distributions measured by ATLAS, CMS, and LHCb at center-of-mass energy $\\sqrt{S}=7$ TeV is obtained using the color-octet long-distance matrix elements (LDMEs) extracted from CDF data at $\\sqrt{S}=1.96$ TeV. The importance of the fragmentation mechanism and the scale evolution of the fragmentation functions in the upper $p_T$ range, beyond 30 GeV, is demonstrated. The $\\Upsilon(3S)$ $p_T$ distributions measured by CDF at $\\sqrt{S}=1.8$ TeV and by LHCb at $\\sqrt{S}=7$ TeV and forward rapidities are well described using LDMEs fitted to ATLAS data at $\\sqrt{S}=7$ TeV. Comparisons of polarization measurements by CDF and CMS at ...

  20. El nivel de inglés después de cursar educación superior en Colombia: una comparación de distribuciones

    Directory of Open Access Journals (Sweden)

    Julio César Alonso

    2015-12-01

    Full Text Available El gobierno colombiano impulsa una política nacional para fortalecer las competencias comunicativas en inglés en todos los niveles educativos, en especial en la educación superior, pero poco se ha escrito sobre los logros de esa política. Este artículo describe los cambios en la distribución del nivel de inglés entre el ingreso y la terminación de la educación superior. Los resultados muestran que hay una mejora, dado el paso a niveles más altos de calificación, y un aumento de la polarización.

  1. Efficiency enhancement of InGaN/GaN multiple quantum well solar cells using CdS quantum dots and distributed Bragg reflectors

    Science.gov (United States)

    Tsai, Yu-Lin; Lin, Chien-Chung; Han, Hau-Vei; Chen, Hsin-Chu; Chen, Kuo-Ju; Lai, Wei-Chi; Sheu, Jin-Kong; Lai, Fang-I.; Yu, Peichen; Kuo, Hao-Chung

    2013-03-01

    In recent year, InGaN-based alloy was also considered for photovoltaic devices owing to the distinctive material properties which are benefit photovoltaic performance. However, the Indium tin oxide (ITO) layer on top, which plays a role of transparent conductive oxide (TCO), can absorb UV photons without generating photocurrent. Also, the thin absorber layer in the device, which is consequent result after compromising with limited crystal quality, has caused insufficient light absorption. In this report, we propose an approach for solving these problems. A hybrid design of InGaN/GaN multiple quantum wells (MQWs) solar cells combined with colloidal CdS quantum dots (QDs) and back side distributed Bragg reflectors (DBRs) has been demonstrated. CdS QDs provide down-conversion effect at UV regime to avoid absorption of ITO. Moreover, CdS QDs also exhibit anti-reflective feature. DBRs at the back side have effectively reflected the light back into the absorber layer. CdS QDs enhance the external quantum efficiency (EQE) for light with wavelength shorter than 400 nm, while DBRs provide a broad band enhancement in EQE, especially within the region of 400 nm ~ 430 nm in wavelength. CdS QDs effectively achieved a power conversion efficiency enhancement as high as 7.2% compared to the device without assistance of CdS QDs. With the participation of DBRs, the power conversion efficiency enhancement has been further boosted to 14%. We believe that the hybrid design of InGaN/GaN MQWs solar cells with QDs and DBRs can be a method for high efficiency InGaN/GaN MQWs solar cells.

  2. A BIM-based approach to reusing construction firm’s management information

    Directory of Open Access Journals (Sweden)

    Zhiliang Ma

    2012-12-01

    Full Text Available Nowadays most construction firms have begun to use information management systems in their business to work more efficiently. At the same time, a lot of management information is being accumulated and some of the information can be reused to support the decision-making. Up to now, the information has not been reused so effectively in construction firms as expected. This paper introduces a new approach to reusing construction firm’s management information, which is based on BIM (Building Information Modeling technology. In the paper, the current approaches are reviewed at first, and then the framework of the new approach is described. Next, the key issues of the new approach are clarified. Finally, a use case of the new approach is demonstrated. It is concluded that the new approach can be used in construction firms to better reuse the accumulated management information.

  3. A Lacan’s Three Orders Approach to Winter in July by Doris Lessing

    Institute of Scientific and Technical Information of China (English)

    包亚楠

    2014-01-01

    As a famous English contemporary women writer, Doris Lessing always puts her attention on the female characters that live in South Africa. Their lives are pathetic and sad. This thesis tries to analyze one of Lessing ’s short stories— Winter in July from Lacan’s three Orders approach. Lessing is a feminist, but the deeper description of the desire and struggle in men ’s inner world in her works is also remarkable.

  4. Direct interaction of the N-terminal domain of ribosomal protein S1 with protein S2 in Escherichia coli.

    Science.gov (United States)

    Byrgazov, Konstantin; Manoharadas, Salim; Kaberdina, Anna C; Vesper, Oliver; Moll, Isabella

    2012-01-01

    Despite of the high resolution structure available for the E. coli ribosome, hitherto the structure and localization of the essential ribosomal protein S1 on the 30 S subunit still remains to be elucidated. It was previously reported that protein S1 binds to the ribosome via protein-protein interaction at the two N-terminal domains. Moreover, protein S2 was shown to be required for binding of protein S1 to the ribosome. Here, we present evidence that the N-terminal domain of S1 (amino acids 1-106; S1(106)) is necessary and sufficient for the interaction with protein S2 as well as for ribosome binding. We show that over production of protein S1(106) affects E. coli growth by displacing native protein S1 from its binding pocket on the ribosome. In addition, our data reveal that the coiled-coil domain of protein S2 (S2α(2)) is sufficient to allow protein S1 to bind to the ribosome. Taken together, these data uncover the crucial elements required for the S1/S2 interaction, which is pivotal for translation initiation on canonical mRNAs in gram-negative bacteria. The results are discussed in terms of a model wherein the S1/S2 interaction surface could represent a possible target to modulate the selectivity of the translational machinery and thereby alter the translational program under distinct conditions.

  5. The Concept of Tributalism: A Comparative Analysis of S. Amin‘s, J. Haldon‘s and H. H. Stahl‘s Approaches

    Directory of Open Access Journals (Sweden)

    Nerijus Babinskas

    2009-11-01

    Full Text Available By this article the author wants to revive the discussion about Marxist schemas of social development and their applicability for constructing models of universal history. The viewpoints of three scholars are presented in the current text: Samir Amin‘s who is known in the Western historiography tradition as the main creator and promoter of the concept of tributary mode of production, John Haldon‘s who has paid much attention to the above-mentioned concept and has dedicated an entire book to this issue, Henri H. Stahl‘s who created an original alternative approach to the issue of tributalism. The author rejects J. Haldon‘s concept of „mode of production“ as being too narrow. In fact J. Haldon identifies the mode of production with the mode of exploitation. The author proposes a wider definition of the mode of production which is based on the analysis of Karl Marx‘s texts. According to the author, the most important elements of mode of production are exploitative subject (it is defined by property of conditions of production, which realises as the social power and productive/obligatory unit which can be manifested as a household of an individual direct producer or as a community. The author proposes the following classification based on his conception of a mode of production:1.A proprietor of land is a monarch/state and the productive/obligatory unit is the community (of Asiatic/Slavonic type;2.A proprietor of land is a monarch/state and the productive/obligatory unit is the household of an individual direct producer;3.Proprietors of land are private landowners and the productive/obligatory unit is the community (of Asiatic/Slavonic type;4.Proprietors of land are private landowners and the productive/obligatory unit is the household of an individual direct producer.The most important conclusions of the author‘s are as follows:1.H. H. Stahl‘s statement that there were alternatives in the social development of precapitalist

  6. Estrella remisión de V. cielo de las estrella(s).

    OpenAIRE

    2011-01-01

    [ES] Definición del término Estrella remisión de V. cielo de las estrella(s). en el diccionario Dicter. [EN] Definition of the word Estrella remisión de V. cielo de las estrella(s). in the dictionary Dicter.

  7. COMPROMISO ORGANIZACIONAL, ESTRÉS LABORAL, DISPOSICIÓN AL CAMBIO Y SASTIFACIÓN CON EL TRABAJO

    Directory of Open Access Journals (Sweden)

    Antonio Lameda

    1999-01-01

    Full Text Available Este trabajo indaga relación que determinadas característica disposicionales de los empleados tales como: compromiso organizacional, percepción del estrés laboral y disposición al cambio tiene con la sastifación laboral. A tal fin, a una muestra 123 empelados de una organización se aplicaron las escalas: COMTRA, ETRA, FLEXAPER, SATRA. Los datos aportados fueron procesados a través de un modelo de regresion lineal múltiples, cuyo valor F=16.75 p < 0.0001, fue indicador de que el modelo fue valido para explicar la satisfación laboral como una función de las tres variables independientes analizadas, cuyo aporte a la varianza de las sastifaciones con el trabajo fue del 36.2 %.

  8. Oclusión transitoria de comunicación interauricular en el síndrome de Lutembacher

    Directory of Open Access Journals (Sweden)

    Alejandro E. Contreras

    2011-08-01

    Full Text Available Se describe una paciente de 82 años de edad, con síntomas de insuficiencia cardíaca avanzada e hipertensión arterial pulmonar. Un ecocardiograma transtorácico mostró una comunicación interauricular tipo ostium secundum y estenosis valvular mitral concomitante (síndrome de Lutembacher. La valoración ecocardiográfica de la enfermedad mitral se vio dificultada por la presencia del defecto interauricular. Se realizó test de oclusión percutánea transitoria de la comunicación interauricular, observándose la aparición de estenosis valvular mitral grave. El tamaño del defecto interauricular modificó las manifestaciones clínicas y el test de oclusión transitoria ayudó a decidir la conducta terapéutica.

  9. A COMBINATORIAL APPROACH TO THE OXIDATION RESISTANCE OF(Ti,Al)N AND Ti-Al-Si-N HARD COATINGS

    Institute of Scientific and Technical Information of China (English)

    R.Cremer; D.Neuschütz

    2002-01-01

    The increasing complexity of modern functional materials leads to the demand of acost efficient tool for the development of new products. One possible approach to thisquestion is the adaptation of combinatorial methods to the specific requirements of ma-terials industry. These methods, originally developed for the pharmaceutical industry,have recently been applied to the screening of superconductive, magnetoresistant andphotoluminescent materials. The principle of these combinatorial approaches is thedeposition of large materials libraries in one process combined with fast methods forthe determination of the resulting properties. In this paper, the deposition and charac-terization of laterally graded materials libraries (composition spread) is presented. Thefilms have been deposited by reactive magnetron sputtering, using two or three metallictargets at a low angle to the substrate surface as well as a system of apertures. Toillustrate the advantages of combinatorial approaches for the development of advancedmaterials, the multicomponent metastable hardcoatings (Ti, Al)N and Ti-Al-Si-N arediscussed with special emphasis on the relations between structure and composition onthe one hand and the oxidation resistance of these coatings on the other. The resultsillustrate that the composition spread approach is a powerful and cost efficient tool forthe development and optimization of new multicomponent functional materials.

  10. Bis(μ-N-benzyl-N-tetradecyldithiocarbamato-κ2S:S′bis[(N-benzyl-N-tetradecyldithiocarbamato-κ2S,S′zinc(II

    Directory of Open Access Journals (Sweden)

    Chun-Man Jia

    2009-04-01

    Full Text Available In the title compound, [Zn2(C22H36NS24], two bidentate dithiocarbamate groups chelate directly to the ZnII atoms, whereas the two remaining dithiocarbamate ligands bridge the Zn atoms via a crystallographic inversion centre. The Zn atoms show a strongly distorted tetrahedral geometry. Adding the long S...S distance with the inversion centre being in the middle, the resulting five-coordinate geometry around the Zn atoms can be considered to be between distorted rectangular pyramidal and trigonal bipyramidal, with a calculated τ value of 0.31. In this dimer complex, two inversion-related tetradecyl carbon chains exhibit all-trans conformations, and the other two chains show a cis conformation at the end of the chains.

  11. Combustión con transportadores sólidos de oxígeno

    Directory of Open Access Journals (Sweden)

    F. García-Labiano

    2007-01-01

    Full Text Available En la combustión con transportadores sólidos de oxígeno no hay penalización energética ya que la separación es inherente al propio proceso de combustión, con lo que se evita la posterior separación del CO2 de los humos de combustión.

  12. Cultural Magazines in Cali: Approaching Cali’s Cultural Modernization During the 1970s and 1980sCultural Magazines in Cali: Approaching Cali’s Cultural Modernization During the 1970s and 1980s

    Directory of Open Access Journals (Sweden)

    Adrián Alzate García

    2012-08-01

    Full Text Available The 1970s and 1980s represented a period of great cultural growth in the city of Cali. The transformations experienced by the city during this time period, along with increasing action by new actors and discourse in the artistic life of the city, led to a number of changes in the local artistic landscape and broadened the audience for “culture”. Cultural magazines played a vital role in this process, simultaneously serving as forums for new ideas and artistic content and as the medium for the popularizing of these same ideas. This article will examine this dual function with the aim of illustrating the importance of these magazines as modernizing agents of local culture.

  13. Human Development and Gender Justice in the Amartya Sen’s Capability Approach

    Directory of Open Access Journals (Sweden)

    S. Mirvasinik

    2015-11-01

    Full Text Available The present research examines, within the context of political thought and using the analytical-interpretive method, the most important theoretical assumptions of Amartya Sen’s capability approach, and investigates its effects on the field of gender equality. Here it is argued that understanding development and its impacts on equality and justice cannot be separated from its underlying philosophical implications. In this context, gender-based study of theories of development suggests their failure in the field of women’s issues and their gender-related barriers in benefitting from the opportunities and real sources of life. These approaches either adopt a passive attitude toward women or overlook their abilities by having an abstract conception of freedom and equal opportunity. Capability approach, which is the basis of Amartya Sen’s humane approach to development, provides us with a comprehensive perspective in this regard. By establishing a link between freedom, justice and democracy, Sen considers the empowerment of women to be the axis of development. In this approach, in order to fulfill women’s instrumental freedom, development should focus primarily on women’s empowerment and then provide suitable external conditions for them to express themselves and to have their power of selection.

  14. Repolarización precoz: de benigna a muerte súbita

    Directory of Open Access Journals (Sweden)

    Guillermo Trout

    2013-11-01

    Full Text Available Title: Early repolarization: from benign to sudden death La repolarización precoz es un hallazgo frecuente caracterizado por elevación del segmento ST, empastamiento al final del QRS en 2 o más derivadas electrocardiográficas contiguas. Durante años fue considerada benigna, pero actualmente observaciones de casos, estudios clínicos y electrofisiológicos sugieren un rol crítico en la patogénesis de la fibrilación ventricular idiopática. Estudios poblacionales establecieron asociación entre esta patente y el riesgo de muerte por eventos arrítmicos. La muerte súbita cardiaca es un problema de salud pública, anualmente causa alrededor de 350.000 muertes en Estados Unidos. Muchos casos están asociados a arritmias ventriculares, de los cuales 6-14% son en individuos sin cardiopatía estructural y está determinada por anormalidades genéticas que afectan los canales iónicos o idiopáticos como el síndrome de repolarización precoz y la fibrilación ventricular idiopática que generan el 10% de dichas muertes. La revisión aborda la fisiopatología de la RP, con el fin de comprender los mecanismos por los cuales es asociada a arritmias malignas. Además, para diferenciar este patrón de otros que también generan elevación del ST y dilucidar el enfoque y recomendaciones actuales para el diagnóstico y manejo. (DUAZARY 2013 No. 1, 41 - 50AbstractEarly repolarization is a common finding characterized by ST segment elevation, QRS slurring end in 2 or more contiguous electrocardiographic derivative. For years he was considered benign, but at present observations of cases, clinical and electrophysiological studies suggest a critical role in the pathogenesis of idiopathic ventricular fibrillation. Population studies established association between this patent and risk of death from arrhythmic events. Sudden cardiac death is a public health problem, annually causes about 350,000 deaths in America. Many cases are associated with ventricular

  15. An approach to media education in Africa / Una aproximación a la educación en medios en África

    Directory of Open Access Journals (Sweden)

    Juan Francisco Torregrosa Carmona

    2013-11-01

    Full Text Available In this paper we make an approach to media education in Africa. The called Media Literacy is a social, academic and cultural movement, with special development in certain countries in Latin America and a wide presence in Europe and, to a lesser extent, in other countries. In 1979 Unesco expressly referred to the importance of knowing by society the implications which correspond to the media, due to the importance in many different areas of daily life of citizens. More than three decades later, the aspirations of a suitable media education are extended to the new platforms of media, with the Internet leading, and keep on being of interest as mainstay of civic participation and democratic depth. All of it, without forgetting the rightful role in all parts with respect to the communication for development and communication for social change.En este trabajo se estudia la evolución y la situación presente de la llamada Educación en Medios (Media Literacy en el contexto internacional y en África en particular. Se trata de un movimiento social, académico y cultural con especial desarrollo en determinados países de América Latina y una amplia presencia en Europa y, en menor medida, en otros continentes. La Unesco se refirió expresamente en 1979 a la importancia de conocer por parte de la sociedad cuantas implicaciones corresponden a los medios de comunicación, por su trascendencia en los más diferentes ámbitos del día a día de los ciudadanos. Más de tres decenios después, las aspiraciones de una adecuada educación mediática se amplían a las nuevas plataformas de medios, con Internet a la cabeza, y siguen siendo motivo de interés como pilar de participación cívica y profundización democrática. Todo ello sin olvidar el papel que le corresponde en todas las latitudes respecto a la comunicación para el desarrollo y a la comunicación para el cambio social.

  16. A novel surfactant S-benzoyl-N,N-diethyldithiocarbamate synthesis and its flotation performance to galena

    Energy Technology Data Exchange (ETDEWEB)

    Ma, Xin; Hu, Yuan; Zhong, Hong, E-mail: zhongh@csu.edu.cn; Wang, Shuai, E-mail: wangshuai@csu.edu.cn; Liu, Guangyi; Zhao, Gang

    2016-03-01

    Graphical abstract: - Highlights: • A novel surfactant BEDTC was first introduced as galena flotation collector. • BEDTC exhibited superior collecting power to galena against sphalerite. • BEDTC has two active centers to mineral surfaces. • BEDTC molecules formed two distinct adsorption geometries on galena surfaces. - Abstract: In this paper, a novel dithiocarbamate compound, S-benzoyl-N,N-diethyldithiocarbamate (BEDTC), was synthesized via one-pot reaction of diethylamine, carbon disulfide, sodium hydroxide and benzoyl chloride using abundant carbon disulfide as a solvent. Its flotation performance and adsorption mechanism on the galena was first investigated by flotation tests, adsorption quantity measurements, FTIR spectra, X-ray photoelectron spectra (XPS) and density functional theory (DFT) calculation. The flotation results illustrated that BEDTC exhibited stronger collecting power than the conventional sulphide collectors such as sodium diethyl dithiocarbamate (SEDTC) and sodium isobutyl xanthate (SIBX) and superior selectivity for galena against sphalerite. The adsorption data demonstrated that the adsorption affinity of BEDTC to galena was stronger than that of SEDTC and SIBX, and the preferable pH range for BEDTC adsorption on galena surfaces was 6–10. The results of FTIR spectra and XPS indicated that the interaction of BEDTC with galena may be dominated by the chemical adsorption, which was further confirmed by DFT calculation. BEDTC probably acted as a bidentate ligand, bonding with lead through the thiol sulfur and carbonyl oxygen atoms to form two distinct adsorption geometries, one with the same Pb atom to form a six-membered ring complex, and the other with two different Pb atoms to form a ''bullet'' shape complex.

  17. Reaction of Tosylmethyl Isocyanide with N-Heteroaryl Formamidines: an Alternative Approach to the Synthesis of N-Heteroaryl Tosylimidazoles

    Energy Technology Data Exchange (ETDEWEB)

    Gomezgarcia, Omar; Salgadozamora, Hector; Reyesarellano, Aliciam; Camposaldrete, Elena; Peraltacruz, Javier [Departamento Quimica Organica, Colonia (Mexico)

    2013-09-15

    In conclusion, an alternative procedure was developed under mild conditions for the synthesis of 2-(4-tosylimidazo-1-yl)pyridines and pyrimidines by the reaction of TosMIC with the corresponding heteroaryl N,N'-dimethyl form-amidines. This approach does not involve a nucleophilic displacement of a leaving group and constitutes a further application of amidines, in which TosMIC acts as both a nucleophile and an electrophile on the heteroaryl formamidine. This process offers advantages over previously reported procedures. Tosyl methyl isocyanide (TosMIC), a multipurpose commercially available 3-unit synthon introduced by Van Leusen, reacts with a variety of groups to give heterocycles. It is important to emphasize that treatment of TosMIC with various functional groups leads to the formation of the imidazole nucleus, such as is the case with imines, imidoyl chlorides, isothiocyanates, nitrile and ethoxy methylene amino. However, only the latter group yields N-heterocycle imidazoles.

  18. Simultaneous determination of N-hydroxymethyl-N-methylformamide, N-methylformamide and N-acetyl-S-(N-methylcarbamoyl)cystein in urine samples from workers exposed to N,N-dimethylformamide by liquid chromatography-tandem mass spectrometry.

    Science.gov (United States)

    Sohn, Jae Ho; Han, Min Jeong; Lee, Mi Young; Kang, Seong-Kyu; Yang, Jeong Sun

    2005-02-07

    N-Hydroxymethyl-N-methylformamide (HMMF) and N-methylformamide (NMF) in urine samples from workers exposed to N,N-dimethylformamide (DMF) cannot be distinguished by a gas chromatographic method because HMMF is converted to NMF at the injection port of gas chromatography (GC). Total NMF (HMMF+NMF) has been measured instead. Also, the determination of N-acetyl-S-(N-methylcarbamoyl)cystein (AMCC), which is supposed to be related to the toxicity of DMF, needs multiple treatments to convert to a volatile compound before GC analysis. There is no previous report of a simultaneous determination of three major metabolites of DMF in urine. The aim of this study is to develop a simple and selective method for the determination of DMF metabolite in urine. By using a liquid chromatography-tandem mass spectrometry, we can directly distinguish these three major metabolites of DMF in a single run. The diluted urine samples were analyzed on Capcell Pak MF SG80 column with the mobile phase of methanol in 2mM formic acid (10:90, v/v). The analytes were detected by an electrospray ionization tandem mass spectrometry in the multiple-reaction-monitoring mode. The standard curves were linear (r>0.999) over the concentration ranges of 0.004-8 microg/mL. The precision and accuracy of quality control samples for inter-batch (n=6) analyses were in the range of 1.3-9.8% and 94.7-116.8, respectively. The sum of each HMMF and NMF concentration determined by LC-MS/MS method shows high correlation (r=0.9927 with the slope of 1.0415, p<0.0001) with NMF included HMMF concentration determined by GC method for 13 urine samples taken from workers exposed to DMF. The excretion ratio of HMMF:NMF:AMCC is approximately 4:1:1 in molar concentration.

  19. A Modernist Approach to T.S Eliot’s The Love Song of J. Alfred Prufrock

    Directory of Open Access Journals (Sweden)

    Samet Güven

    2015-12-01

    Full Text Available A Modernist Approach to T.S Eliot’s “The Love Song of J. Alfred Prufrock" Abstract  T.S. Eliot’s The Love Song of J. Alfred Prufrock carries the characteristics of modernist poetry such as objective correlative, fragmentation, free verse and irregular rhyming. It suggests a direct break with English romantic poets such as Coleridge and Wordsworth (Levis 75. Sara Thorne states that unlike the Romantic poets, Eliot attempts to convey the essence of life; and the content represents actual contemporary life rather than an escape from the grinding nature of reality (281. 'The Love Song of J. Alfred Prufrock’ exemplifies Thorne’s definition of Eliot’s poetic art clearly. The poem is about a middle-aged man who cannot make a progress in life and dare to approach women due to his timidity. Hence, the title of the poem is ironic since Prufrock never talks about his feelings of love throughout the poem. His indecisiveness is also caused by self-isolation from the society as a modern man. He finds himself in a society which is not different from a hell for him, so Eliot portrays the complexities of the modern world vividly through the inconsistent psychology of Prufrock. Elisabeth Schneider clarifies that 'The Love Song’ is more than a retreat from love, however; it is the portrait of a man in Hell, though until his truth is clearly realized, the hell appears to be merely the trivial one of the self-conscious individual in a sterile society (1104. Apart from the content, in the form Eliot uses objective correlative to relate feelings through the use of objects. The poem focuses on the dilemma caused by modern urban civilization and therefore, the purpose of this paper is to show how T.S. Eliot’s The Love Song of J. Alfred Prufrock reflects modernism in terms of its content and structure respectively.

  20. Generalized hypercube graph $\\Q_n(S$, graph products and self-orthogonal codes

    Directory of Open Access Journals (Sweden)

    Pani Seneviratne

    2016-01-01

    Full Text Available A generalized hypercube graph $\\Q_n(S$ has $\\F_{2}^{n}=\\{0,1\\}^n$ as the vertex set and two vertices being adjacent whenever their mutual Hamming distance belongs to $S$, where $n \\ge 1$ and $S\\subseteq \\{1,2,\\ldots, n\\}$. The graph $\\Q_n(\\{1\\}$ is the $n$-cube, usually denoted by $\\Q_n$.We study graph boolean products $G_1 = \\Q_n(S\\times \\Q_1, G_2 = \\Q_{n}(S\\wedge \\Q_1$, $G_3 = \\Q_{n}(S[\\Q_1]$ and show that binary codes from neighborhood designs of $G_1, G_2$ and $G_3$ are self-orthogonal for all choices of $n$ and $S$. More over, we show that the class of codes $C_1$ are self-dual. Further we find subgroups of the automorphism group of these graphs and use these subgroups to obtain PD-sets for permutation decoding. As an example we find a full error-correcting PD set for the binary $[32, 16, 8]$ extremal self-dual code.

  1. Emilia Pardo Bazán, cronista en París (1889

    Directory of Open Access Journals (Sweden)

    Jiménez Morales, María Isabel

    2008-12-01

    Full Text Available This paper is a thorough study of Al pie de la Torre Eiffel and Por Francia y por Alemania, by Emilia Pardo Bazán. These two works were published after her trip to Paris, as a reporter of the Universal Exhibition of 1889. They reflect many of the characteristics of her literature: eclecticism, autobiographical content, subjective and intimate approach, social denunciation, etc. Although they have never been studied by specialised critics, they contribute to know better the writer’s mentality and also understand the ideological evolution of such an outstanding thinker. They are especially appealing in that they are written in the decade previous to the 98 disaster, when a widespread awareness of national decline started to raise in Spain.Este artículo estudia en profundidad Al pie de la Torre Eiffel y Por Francia y por Alemania, de Emilia Pardo Bazán. Estas dos obras fueron publicadas tras su viaje a París, como cronista de la Exposición Universal de 1889. Reflejan muchas de las características de su literatura: eclecticismo, aporte autobiográfico, enfoque subjetivo e íntimo, denuncia social, etc. Nunca estudiadas por la crítica especializada, ayudan a conocer mejor la mentalidad de la escritora y a comprender la evolución ideológica de pensadora tan relevante. Muestran el atractivo de haber sido escritas en la década anterior al desastre del 98, cuando en España se fue fraguando la generalizada toma de conciencia de la decadencia nacional.

  2. Impacts of recessed gate and fluoride-based plasma treatment approaches toward normally-off AlGaN/GaN HEMT.

    Science.gov (United States)

    Heo, Jun-Woo; Kim, Young-Jin; Kim, Hyun-Seok

    2014-12-01

    We report two approaches to fabricating high performance normally-off AIGaN/GaN high-electron mobility transistors (HEMTs). The fabrication techniques employed were based on recessed-metal-insulator-semiconductor (MIS) gate and recessed fluoride-based plasma treatment. They were selectively applied to the area under the gate electrode to deplete the two-dimensional electron gas (2-DEG) density. We found that the recessed gate structure was effective in shifting the threshold voltage by controlling the etching depth of gate region to reduce the AIGaN layer thickness to less than 8 nm. Likewise, the CF4 plasma treatment effectively incorporated negatively charged fluorine ions into the thin AIGaN barrier so that the threshold voltage shifted to higher positive values. In addition to the increased threshold voltage, experimental results showed a maximum drain current and a maximum transconductance of 315 mA/mm and 100 mS/mm, respectively, for the recessed-MIS gate HEMT, and 340 mA/mm and 330 mS/mm, respectively, for the fluoride-based plasma treated HEMT.

  3. Os sentimentos vivenciados após exposição ocupacional entre trabalhadores de saúde: fulcro para repensar o trabalho em instituições de saúde Los sentimientos experimentados después de la exposición ocupacional de los trabajadores de salud: enfoque para trabajar en instituciones de salud The feelings experienced after occupational exposure among health care workers: fulcrum approach to work in health institutions

    Directory of Open Access Journals (Sweden)

    Leila Maria Mansano Sarquis

    2009-10-01

    Full Text Available Este estudo objetivou captar os sentimentos psicossociais e percepções dos trabalhadores após acidente com fluido biológico identificando as dificuldades para realizar o acompanhamento. Pesquisa de abordagem qualitativa cuja amostra foi intencional, compreendeu 15 trabalhadores de saúde. O medo foi o primeiro sentimento expresso. O medo que o trabalhador sofre no desempenho de suas atribuições, potencia o desenvolvimento de situações estressantes geradas no ambiente de trabalho e desencadeiam sofrimento psíquico. Os sentimentos de raiva e revolta aparecem nos discursos diante da indignação do trabalhador. Outro sentimento manifestado pelos sujeitos é a culpa pelo desencadeamento do acidente. Essa constatação permite recomendar propostas de reestruturação organizacional, bem como no comportamento dos trabalhadores envolvidos na dinâmica do trabalho.Esto estudio objetivó capturar los sentimientos psicológicos y las percepciones que los trabajadores de salud enfrentan después de accidentes con materiales biológicos, identificando las dificultades para la realización del seguimiento. Una investigación cualitativa con amuestra intencional de 15 trabajadores fue realizada. El miedo fue lo primer sentimiento expresado. El miedo está relacionado a sus atribuciones y potencializa el desarrollo de situaciones de estrés en el ambiente de trabajo y desencadena el sufrimiento psicológico. El sentimiento de ira y revuelta aparece en los discursos antes de la indignación de los trabajadores. Otro sentimiento es la culpa por el desencadenamiento del accidente. Estos resultados permiten recomendar la propuesta de restructuración organizacional así como para el comportamiento de los trabajadores en la dinámica del trabajo.This study aimed at capturing the psychosocial feelings and perceptions health workers face after accidents with biological material, identifying the difficulties to accomplish the follow-up. This qualitative

  4. SYNTHESIS OF OPTICALLY ACTIVE POLY(N-VINYLCARBAZOLE)S

    Institute of Scientific and Technical Information of China (English)

    CHEN Chuanfu; SU Quan; LIU Weihong; CHEN Yongming; XI Fu

    1996-01-01

    The organic salts as initiators [A*+B- :Ph3*C+ClO4-, Ph3*C+SbCl6-, (-)Sp*+ClO4- and (-)(Sp)2*+3(ClO4-)3] and catalysts [A+B*-:(+)CSA*, A*+B*-:Ph3*C+(+)CSA*- and (-)Sp*+(+)CSA*] are prepared and characterized by specific rotation. The asymme trically stereoselective induction of the initiators and catalysts in the polymerization of N-vinylcarbazole is in an order of A*+B*- >A+B*- >A*+B-. The specific rotations of obtained poly(N-vinylcarbazole) (PVCZ) generally are in accordance with mentioned order.

  5. A Facile Way to Fabricate High-Performance Solution-Processed n-MoS2/p-MoS2 Bilayer Photodetectors.

    Science.gov (United States)

    Ye, Jian; Li, Xueliang; Zhao, Jianjun; Mei, Xuelan; Li, Qian

    2015-12-01

    Two-dimensional (2D) material has many advantages including high carrier mobilities and conductivity, high optical transparency, excellent mechanical flexibility, and chemical stability, which made 2D material an ideal material for various optoelectronic devices. Here, we developed a facile method of preparing MoS2 nanosheets followed by a facile liquid exfoliation method via ethyl cellulose-assisted doping and utilizing a plasma-induced p-doping approach to generate t effectively the partially oxided MoS2 (p-MoS2) nanosheets from the pristine n-type nanosheets. Moreover, an n-p junction type MoS2 photodetector device with the built-in potentials to separate the photogenerated charges is able to significantly improved visible light response. We have fabricated photodetector devices consisting of a vertically stacked indium tin oxide (ITO)/pristine n-type MoS2 nanosheets/p-MoS2/Ag structure, which exhibit reasonably good performance illumination, as well as high current values in the range of visible wavelength from 350 to 600 nm. We believe that this work provides important scientific insights for photoelectric response properties of emerging atomically layered 2D materials for photovoltaic and other optoelectronic applications.

  6. Actualización en caracterización molecular de levaduras de interés industrial

    OpenAIRE

    Jorge Alberto Vásquez C; Mauricio Ramirez Castrillón; Zulma Isabel Monsalve F

    2016-01-01

    Las levaduras, además de ser un modelo de la investigación biomédica, tienen diversas aplicaciones en la industria alimentaria, en agricultura y la producción de etanol combustible. Dado que la calidad y la cantidad del producto dependen de la dinámica y la frecuencia de los microorganismos presentes en la fermentación, el uso de herramientas de caracterización molecular se ha incrementado y popularizado en las industrias que emplean levaduras. Estas técnicas se basan en la amplificación o an...

  7. A search for AdS5 X S2 IIB supergravity solutions dual to N = 2 SCFTs

    CERN Document Server

    Colgáin, Eoin Ó

    2011-01-01

    We present a systematic search for Type IIB supergravity solutions whose spacetimes include AdS5 and S2 factors, which would be candidate duals to N = 2 four-dimensional Superconformal field theories. The candidate solutions encode the SU(2) R-symmetry geometrically on the S2 and an additional Killing vector generates the U(1) R-symmetry. By analysing the Killing spinor equations we show that no such solutions exist. This suggests that, if Type IIB backgrounds dual to N = 2 SCFTs exist, the SU(2) R-symmetry is realised non-geometrically. Finally, we also show that, in the context of both N = 1 and N = 2 Type IIB backgrounds with an AdS5 factor, the only candidate U(1) R-symmetry Killing vector directions are the ones that appear for generic values of the Killing spinors; no further Killing vectors exist for special values of the Killing spinors.

  8. MAINSTREAM TEACHERS’ ATTITUDE AND APPROACHES TO SUPPORT CHILDREN’S BILITERACY DEVELOPMENT IN AUSTRALIAN CLASSROOM CONTEXT

    OpenAIRE

    Muhammad Basri Jafar

    2010-01-01

    This article examines the role of mainstream teachers in supporting children’s biliteracy development and bilingualism in a public primary school where English is the medium of instruction. It reports a research conducted in a public primary school in Australia. The research employs a longitudinal ethnographic approach to collect data on how the teachers perceive biliteracy and the extent to which the approaches they adopt impact on their biliteracy and bilingualism development. The research ...

  9. Miracle’s 2005 Approach to Cross-lingual Information Retrieval

    OpenAIRE

    González Cristóbal, José Carlos; Goñi Menoyo, José Miguel; Villena Román, Julio

    2005-01-01

    This paper presents the 2005 Miracle’s team approach to Bilingual and Multilingual Information Retrieval. In the multilingual track, we have concentrated our work on the merging process of the results of monolingual runs to get the multilingual overall result, relying on available translations. In the bilingual and multilingual tracks, we have used available translation resources, and in some cases we have using a combining approach.

  10. Gibson’s ecological approach – a model for the benefits of a theory driven psychology

    OpenAIRE

    Sabrina Golonka; Wilson, Andrew D.

    2012-01-01

    Unlike most other sciences, psychology has no true core theory to guide a coherent research programme. It does have James J Gibson’s ecological approach to visual perception, however, which we suggest should serve as an example of the benefits a good theory brings to psychological research. Here we focus on an example of how the ecological approach has served as a guide to discovery, shaping and constraining a recent hypothesis about how humans perform coordinated rhythmic movements (Bingham ...

  11. Ramsey Number of K2,s+1 vs. K1,n%关于K2,s+1 VS,K1,n的Ramsey数

    Institute of Scientific and Technical Information of China (English)

    秦大伟; 沈大鹏

    2007-01-01

    It is shown that the Ramsey number r(K2,s+1, K1,n) ≤ n + √sn+ (s + 3)/2 + o(1) for large n, and r(K2,s+1, K1,n)∈{(q-1)2/s+1,-(q-1)2/s+2},wheren: (q-1)2/s-q+2 and q is a prime power such that s|(q - 1).

  12. CRITICAL REVIEW OF N, N{sup +}, N{sup +} {sub 2}, N{sup ++}, And N{sup ++} {sub 2} MAIN PRODUCTION PROCESSES AND REACTIONS OF RELEVANCE TO TITAN'S ATMOSPHERE

    Energy Technology Data Exchange (ETDEWEB)

    Dutuit, Odile; Thissen, Roland; Vuitton, Veronique [Institut de Planetologie et d' Astrophysique de Grenoble, UJF-Grenoble 1/CNRS-INSU, UMR 5274, F-38041 Grenoble (France); Carrasco, Nathalie [Laboratoire Atmospheres, Milieux, Observations Spatiales, CNRS, UVSQ/UPMC, F-78280 Guyancourt (France); Alcaraz, Christian; Pernot, Pascal [Laboratoire de Chimie Physique, CNRS/UPS UMR 8000, Bat.349, F-91405 Orsay Cedex (France); Balucani, Nadia; Casavecchia, Piergiorgio [Dipartimento di Chimica, Universita degli Studi di Perugia, Via Elce di Sotto, 8, I-06123 Perugia (Italy); Canosa, Andre; Picard, Sebastien Le [Departement de Physique Moleculaire, Universite de Rennes 1, Institut de Physique de Rennes, UMR 6251 CNRS Universite, Campus de Beaulieu-Bat 11C, F-35042 Rennes Cedex (France); Loison, Jean-Christophe [Institut des Sciences Moleculaires, Universite Bordeaux 1/CNRS, UMR 5255, 351 cours de la Liberation, F-33405 Talence Cedex (France); Herman, Zdenek; Zabka, Jan [J. Heyrovsky Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Dolejskova 3 CZ-182 23 Prague 8 (Czech Republic); Ascenzi, Daniela; Tosi, Paolo [Dipartimento di Fisica, Universita di Trento, Via Sommarive 14, I-38123 Trento (Italy); Franceschi, Pietro [Biostatistics and Data Management, IASMA Research and Innovation Centre, Fondazione E. Mach, Via E. Mach, 1 I-38010 S. Michele all' Adige (Italy); Price, Stephen D. [Department of Chemistry, UCL, Christopher Ingold Laboratories, 20 Gordon Street, London WC1H 0AJ (United Kingdom); Lavvas, Panayotis, E-mail: roland.thissen@obs.ujf-grenoble.fr [Groupe de Spectrometrie Moleculaire et Atmospherique, CNRS, UMR 6089, Campus Moulin de la Housse-BP 1039, Universite Reims Champagne-Ardenne, F-51687 Reims (France)

    2013-02-15

    This paper is a detailed critical review of the production processes and reactions of N, N{sup +}, N{sup +} {sub 2}, N{sup ++}, and N{sup ++} {sub 2} of relevance to Titan's atmosphere. The review includes neutral, ion-molecule, and recombination reactions. The review covers all possible active nitrogen species under Titan's atmospheric conditions, specifically N{sub 2} (A {sup 3}{Sigma}{sup +} {sub u}), N ({sup 4} S), N ({sup 2} D), N ({sup 2} P), N{sup +} {sub 2}, N{sup +} ({sup 3} P), N{sup +} ({sup 1} D), N{sup ++} {sub 2}, and N{sup ++} species, and includes a critical survey of the reactions of N, N{sup +}, N{sup +} {sub 2}, N{sup ++}, and N{sup ++} {sub 2} with N{sub 2}, H{sub 2}, D{sub 2}, CH{sub 4}, C{sub 2}H{sub 2}, C{sub 2}H{sub 4}, C{sub 2}H{sub 6}, C{sub 3}H{sub 8} and the deuterated hydrocarbon analogs, as well as the recombination reactions of N{sup +} {sub 2}, N{sup +}, N{sup ++} {sub 2}, and N{sup ++}. Production processes, lifetimes, and quenching by collisions with N{sub 2} of all reactant species are reviewed. The N ({sup 4} S) state is reactive with radicals and its reactions with CH{sub 2}, CH{sub 3}, C{sub 2}H{sub 3}, and C{sub 2}H{sub 5} are reviewed. Metastable states N{sub 2} (A {sup 3}{Sigma}{sup +} {sub u}), N ({sup 2} D), and N ({sup 2} P) are either reactive or quenched by collisions with the target molecules reviewed. The reactions of N{sup +} ({sup 1} D) have similar rate constants as N{sup +} ({sup 3} P), but the product branching ratios differ significantly. Temperature effects and the role of the kinetic energy content of reactants are investigated. In all cases, experimental uncertainties of laboratory data are reported or estimated. Recommended values with uncertainties, or estimated values when no data are available, are given for rate constants and product branching ratios at 300 K and at the atmospheric temperature range of Titan (150-200 K for neutral reactions and 150 K for ion reactions).

  13. Oltenia’s identity – A systemic approach of a tourism destination’s universe

    Directory of Open Access Journals (Sweden)

    Aurelia-Felicia STĂNCIOIU

    2013-07-01

    Full Text Available The multitude of tourism products, “constructed” with a basis containing the resources of a tourism destination, on the one hand, and from the anticipation of the tourists’ needs and desires, on the other hand, is “hosted” in a complex space, which transcends the spatial and temporal coordinates. Therefore, it is necessary that the marketing specialists know and subsequenty use the components of the “destination’s universe” in the laborious process of constructing tourism products with specific, authentic elements, constituting points of contact between the targeted consumer segments and the nature and culture of the destination itself. The purpose of this paper is to identify, within a quantitative research, those specific elements of the region which can “collaborate” on developing every structured tourism product, comprising both tangible and intangible elements, functional and symbolic, which can be offered to as many market segments as possible, through planned activities of destination marketing, yet entirely complying with its identity.

  14. Study of creep behavior of a calcarenite: San Julián´s stone (Alicante

    Directory of Open Access Journals (Sweden)

    Brotóns, V.

    2013-12-01

    Full Text Available Rocks creep has a great importance in the evaluation of the long-term behaviour of elements built with or within these materials. In this work, a porous well-known limestone locally named as San Julián stone has been physically and mechanically characterized. Uniaxial compressive tests for 96 h. at constant stress are carried out. Long-term behaviour has been modelled by means of a well-known creep model, the CEB-FIP Model code 2010, used for modelling other stony-material (i.e. concrete. Furthermore, a rheological model has been proposed. The main aim of this work is to investigate the possibility of exploiting the vast experience accumulated in the study of concrete deformational long-term behaviour in order to obtaining a reasonable approach to the behaviour of the rock, for too long testing times difficult to implement in laboratory. A creep function adapted to the studied rock only dependent on its elastic and mechanical characteristics is also proposed in this work.La fluencia de las rocas tiene gran importancia en la evaluación del comportamiento a largo plazo de elementos construidos con estos materiales. En este trabajo, se ha caracterizado física y mecánicamente una calcarenita porosa bien conocida localmente como Piedra de San Julián. Se han realizado ensayos de compresión uniaxial de 96 h. a carga constante. Se ha utilizado un modelo de fluencia bien conocido, el Código-modelo CEB-FIP 2010, usado para modelizar otro material pétreo (hormigón. Además, se ha propuesto un modelo reológico. El objetivo principal de este trabajo es investigar la posibilidad de aprovechar la gran experiencia acumulada en el estudio del hormigón, con el fin de obtener un enfoque para el comportamiento de la roca, para tiempos de prueba muy largos difíciles de implementar en laboratorio. Se propone una función de fluencia adaptada a la roca estudiada dependiente sólo de sus características elásticas y mecánicas.

  15. Eliminación del dodecilbencensulfonato sódico de las aguas mediante adsorcion en carbones activados, ozonización catalizada y fotoxidación

    Directory of Open Access Journals (Sweden)

    J.D. Méndez-Díaz

    2008-12-01

    Full Text Available Se estudian las posibilidades que presentan algunos de los tratamientos de aguas más importantes en la eliminación del dodecilbencensulfonato sódico (SDBS. La influencia de las diferentes variables operacionales, así como el mecanismo implicado en cada proceso también han sido objeto de estudio.

  16. Crystal structure of bis[S-hexyl 3-(4-methylbenzylidenedithiocarbazato-κ2N3,S]nickel(II

    Directory of Open Access Journals (Sweden)

    M. B. H. Howlader

    2015-02-01

    Full Text Available In the title complex, [Ni(C15H21N2S22], the NiII atom exhibits a square-planar coordination geometry and is located on an inversion centre leading to a trans configuration of the N,S-chelating ligands. In the crystal, the complex molecules stack at a distance of 4.6738 (3 Å along the a axis, which exclude any significant interactions between the aromatic rings.

  17. Biogás y gestión de deyecciones ganaderas

    OpenAIRE

    Flotats Ripoll, Xavier

    2010-01-01

    El proceso de digestión anaerobia y producción de biogás es uno de los más idóneos para el aprovechamiento energético de las deyecciones ganaderas, la reducción de emisiones de gases de efecto invernadero (GEI) por el sector ganadero, la mejora del valor fertilizante de los productos tratados y la reducción de malos olores. También permite combinar con sistemas de tratamiento conducentes a la recuperación de nutrientes. La promoción e implantación de sistemas de producción de biogás colect...

  18. Pepeljajev eesti näitlejatega USA-s

    Index Scriptorium Estoniae

    2008-01-01

    Sasha Pepeljajevi tantsulavastust "Uksed" etendati USA rahvusvahelisel teatrifestivalil "Arts & Ideas". Vene-Eesti trupi Apparatus lavastus on pühendatud Daniil Harmsi 100. sünniaastapäevale ning põhineb tema töödel

  19. Pepeljajev eesti näitlejatega USA-s

    Index Scriptorium Estoniae

    2008-01-01

    Sasha Pepeljajevi tantsulavastust "Uksed" etendati USA rahvusvahelisel teatrifestivalil "Arts & Ideas". Vene-Eesti trupi Apparatus lavastus on pühendatud Daniil Harmsi 100. sünniaastapäevale ning põhineb tema töödel

  20. La sílaba también es importante en la escritura de palabras

    Directory of Open Access Journals (Sweden)

    Olivia Afonso

    2009-05-01

    Full Text Available La sílaba no sólo es funcional en la producción del habla, en la lectura de palabras y en la percepción del lenguaje. Estudios recientes con metodologías on-line han puesto de manifiesto su relevancia también en la escritura manual, incluso en etapas tan periféricas como la ejecución motora.

  1. "Georgicat" näeb USA-s Californias

    Index Scriptorium Estoniae

    2000-01-01

    Sulev Keeduse mängufilm "Georgica" linastub Berkeley kinos Fine Arts Cinema. Edasi läheb film Poola eesti filmi päevadele 6.-10. novembrini. Seal näidatakse ka V. Kuigi lühimängufilmi "Lurjus" ja R. Heidmetsa lastefilmi "Kallis härra Q"

  2. "Georgicat" näeb USA-s Californias

    Index Scriptorium Estoniae

    2000-01-01

    Sulev Keeduse mängufilm "Georgica" linastub Berkeley kinos Fine Arts Cinema. Edasi läheb film Poola eesti filmi päevadele 6.-10. novembrini. Seal näidatakse ka V. Kuigi lühimängufilmi "Lurjus" ja R. Heidmetsa lastefilmi "Kallis härra Q"

  3. Methodical approach to profitability evaluation of logistic chain of enterprise’s trading capital financing

    Directory of Open Access Journals (Sweden)

    S.O. Kolodizieva

    2014-06-01

    Full Text Available The aim of the article. The aim of the article is the development and improvement of methodical approaches to evaluation of productivity of bank servicing taking into account introduction of the logistic approach to bank’s financial management. These researches suppose to solve such task as the creation of the relative index which application would allow to estimate above-mentioned productivity by using in calculations known indicators of bank’s, client’s and financial market’s activity. The results of the analysis. In modern competitive environment of banking system it is accruing the particular importance of the problem of search of new, perspective and effective approaches to banking services management, which are directed to full satisfaction client’s needs and maximizing bank’s profit and allowed to considerably increase the efficiency and productivity of above-mentioned services in the conditions of financial resources deficiency. One of such approaches is logistic approach which allows to reach optimal management of all bank’s streams, first of all financial streams. The important scientific task represents in scientific and methodical researches of application of the specified approach to management of bank activity. Despite of sufficient scientific researches devoted to the above problems, methods of evaluation of the efficiency of banking services connected with financial resources utilization, and which are considers the general productivity of all deal’s participants, aren't fully studied. According to authors it is expedient the logistic chain profitability index’s application to bank’s credit services management for achievement of compromise between bank’s and its client’s interest and optimal decision-making in logistic chain as a whole. As the logistic chain authors present the sequence of the processes which are assuming the transformation of interconnected financial streams by subjects of bank crediting

  4. N,S-co-doped TiO2 nanophotocatalyst: synthesis, electronic structure and photocatalysis.

    Science.gov (United States)

    Sathish, M; Viswanath, R P; Gopinath, Chinnakonda S

    2009-01-01

    N,S-co-doped anatase-phase TiO2 (N,S-TiO2) nanophotocatalysts were prepared from either benzothiazoline or aminothiol with titanium isopropoxide followed by a systematic thermal decomposition. The chemical nature of S and N in N,S-TiO2 have been identified by XPS to be sulfate and NO-like, respectively. A significant band broadening and red-shift in the UV-visible absorption spectrum of N,S-TiO2 suggests a band gap reduction compared to TiO2. A maximum band-gap narrowing of 0.22 +/- 0.02 eV was observed on N,S-TiO2. Higher energy width observed on N,S-TiO, is in contrast to 0.13 eV from N-doped TiO2 indicating the sulfate-like species might play a major role in narrowing the band-gap to a higher level. It is confirmed that the oxidation of N and S to NO and SO4(2-) occurs in the final stage of preparation of N,S-TiO2, during calcination in air. It is predicted that the oxygen associated with sulfate and NO structural features could be crucial in bringing down the energy gap and red shift in optical absorption and the role of sulfur is to facilitate the above. Photocatalytic decomposition of methylene blue has been carried out on N,S-TiO2 shows higher activity than the commercial TiO2 in the visible region. However, sulfate species seems to enhance the activity of N,S-TiO2 marginally compared to N-TiO2, and possible suggestions are given to improve the same.

  5. Una Aproximación Operativa al Diagnóstico y la Evaluación de la Comprensión del Conocimiento Matemático (An Operative Approach to Diagnosing and Assessing Mathematical Knowledge Understanding

    Directory of Open Access Journals (Sweden)

    Jesús Gallardo

    2006-09-01

    Full Text Available La comprensión del conocimiento matemático constituye un objeto de investigación de interés creciente en educación matemática. No obstante, su elevada complejidad hace que los avances más recientes aún resulten insuficientes y reclama la necesidad de ir adoptando enfoques más operativos y menos preocupados por el estudio directo de sus aspectos internos. En tal sentido, se presentan aquí las bases de una aproximación centrada en los efectos observables de la comprensión, que utiliza el análisis de comportamientos y respuestas adaptadas a situaciones expresamente planificadas derivadas del análisis fenómeno-epistemológico del conocimiento matemático. La operatividad de la propuesta se ilustra con el estudio realizado sobre el algoritmo estándar escrito para la multiplicación de números naturales. Understanding mathematics has recently became a research topic of increasing interest in mathematics education. However, its high complexity makes to be insufficient the most recent advances and demands to be adopted more operative and less interested about its internal properties approaches. Therefore, the principles of an approach based on the observable effects of understanding mathematics are exposed here, one of which refers to the individual behaviours and answers analysis when facing to specifically prepared situations derived from the phenomenon-epistemological analysis of concrete mathematical knowledge. The operativity of the proposal is also illustrated with some examples related to a study we have carried out on understanding the written standard algorithm for the multiplication of natural numbers.

  6. The geometrical isomers of oxalato and malonato-(ethylenediamine-N,N’-di-S,S-2-propionato-chromate

    Directory of Open Access Journals (Sweden)

    VERICA V. GLODJOVIC

    2005-02-01

    Full Text Available Three octahedral chromium(III complexes of the general formula Na[Cr(S,S-eddpL]·2H2O, where eddp = the tetradentate O–N–N–O-type ligand ethylenediamine-N,N’-di-S,S-2-propionate and L = a bidentate O–O-type ligand, either oxalate or malonate, were prepared. The complexes were synthesized by the reaction of chromium(III chloride, S,S-eddp and malonic acid or sodium oxalate, at 60 ºC. The complexes were isolated chromatographically and the geometric configuration of the complexes was proposed on the basis of their infrared and electronic absorption spectra.

  7. N-Alkyl Carbazole Derivatives as New Tools for Alzheimer’s Disease: Preliminary Studies

    Directory of Open Access Journals (Sweden)

    Carmela Saturnino

    2014-07-01

    Full Text Available Alzheimer’s disease (AD is a progressive and age-related neurodegenerative disorder affecting brain cells and is the most common form of “dementia”, because of the cognitive detriment which takes place. Neuronal disruption represents its major feature, due to the cytosolic accumulation of amyloid β-peptide (Aβ which leads to senile plaques formation and intracellular neurofibrillary tangles. Many studies have focused on the design and therapeutic use of new molecules able to inhibit Aβ aggregation. In this context, we evaluated the ability of two recently synthesized series of N-alkyl carbazole derivatives to increase the Aβ soluble forms, through molecular docking simulations and in vitro experiments. Our data evidenced that two carbazole derivatives, the most active, adopt distinct binding modes involving key residues for Aβ fibrillization. They exhibit a good interfering activity on Aβ aggregation in mouse (N2a cells, stably expressing wild-type human amyloid precursor protein (APP 695. These preliminary results are promising and we are confident that the N-alkyl carbazole derivatives may encourage next future studies needed for enlarging the knowledge about the AD disease approach.

  8. An Efficient Approach for Solving Mesh Optimization Problems Using Newton’s Method

    Directory of Open Access Journals (Sweden)

    Jibum Kim

    2014-01-01

    Full Text Available We present an efficient approach for solving various mesh optimization problems. Our approach is based on Newton’s method, which uses both first-order (gradient and second-order (Hessian derivatives of the nonlinear objective function. The volume and surface mesh optimization algorithms are developed such that mesh validity and surface constraints are satisfied. We also propose several Hessian modification methods when the Hessian matrix is not positive definite. We demonstrate our approach by comparing our method with nonlinear conjugate gradient and steepest descent methods in terms of both efficiency and mesh quality.

  9. Out of the Shadows: What's Behind DEFRA's New Approach to the Price of Carbon

    Energy Technology Data Exchange (ETDEWEB)

    Stanton, Elizabeth A.; Ackerman, Frank (Stockholm Environment Inst., U.S. Center, 11 Curtis Avenue, Somerville, MA 02144 (United States)). e-mail: Liz.Stanton@sei-us.org

    2008-07-15

    In the report SEI researchers examine the new approach for assigning a price to CO{sub 2} emissions developed by the UK Department for Environment Food and Rural Affairs (DEFRA). According to the SEI report, DEFRA's new 'shadow price' methodology takes success in greenhouse gas emissions abatement for granted and therefore results in lower carbon cost estimates. Out of the Shadows was commissioned by Friends of the Earth as part of their studies of the UK Government's approach to climate change economics. In detail, the report examines DEFRA's new approach to estimating the price of carbon, called the shadow price of carbon, or SPC. Until recently, the UK had used a different technique, called the social cost of carbon (SCC), which estimated the sum of all future damage costs resulting from each new unit of greenhouse gases emitted today. The SPC takes a very different approach by first assuming that future emissions will be reduced significantly, thereby avoiding most climate damage. - DEFRA's SPC methodology is rife with questionable, surprising, and under-explained assumptions and procedures. In particular, the size of the SPC, or carbon price, is primarily the result of DEFRA's decision to base it on an assumed best-case trajectory, instead of on realistic current conditions, the report finds. In response to DEFRA's new approach, the authors provide four recommendations towards an abatement policy that is both equitable and efficient: - First, the UK need not build its climate policy around the fear that other countries will fail to abate. Climate change is a global problem that needs a global solution. But every country has a strong incentive to abate and the UK should do whatever it can to abate its own emissions and to spur abatement in other countries. - Second, the UK need not build its climate policy around the fear of investing too much in abatement. UK's responsibility for climate change extends beyond its

  10. Comunicación y entorno organizacional en Kamex International S.A.

    OpenAIRE

    2012-01-01

    Este trabajo presenta el desarrollo de una investigación enfocada al fortalecimiento de la cultura organizacional en la empresa Colombiana Kamex International S.A; mediante una intervención que plantea varias propuestas orientadas al ajuste de su sistema de información. El objetivo se logra mediante un plan de mejora que reúne la aplicación de las tres líneas de investigación de la Universidad EAN: Comunicación Organizacional, Gestión de Conocimiento y Tecnologías de la información y la ...

  11. Edward’s syndrome: A rare cause of difficult intubation-utility of left molar approach

    Directory of Open Access Journals (Sweden)

    Teena Bansal

    2016-04-01

    Full Text Available Edward’s syndrome (trisomy 18 is an autosomal abnormality with dysmorphic face, visceral deformities and delayed mental and motor development including congenital heart disease. Challenges may arise during mask ventilation, laryngoscopy and/or intubation of the trachea due to dysmorphic face. Difficult airway cart should be kept ready. Left molar approach using a standard Macintosh blade improves the laryngoscopic view in patients with difficult midline laryngoscopy. We hereby present a case report of a 2 year old male child with Edward’s syndrome posted for evacuation and drainage of brain abscess, intubated successfully using left molar approach.

  12. $SL(2, Z)$ invariant rotating $(m,n)$ strings in $AdS_3\\times S^3$ with mixed flux

    CERN Document Server

    Barik, Sorna Prava; Kluson, Josef; Panigrahi, Kamal L

    2016-01-01

    We study rigidly rotating and pulsating $(m,n)$ strings in $AdS_3 \\times S^3$ with mixed three form flux. The $AdS_3 \\times S^3$ background with mixed three form flux is obtained in the near horizon limit of $SL(2,Z)$-transformed solution, corresponding to the bound state of NS5-branes and fundamental strings. We study the probe $(m,n)-$string in this background by solving the manifest $SL(2,Z)-$covariant form of the action. We find out the dyonic giant magnon and single spike solutions corresponding to the equations of motion of a probe string in this background and find out various relationships among the conserved charges. We further study a class of pulsating $(m,n)$ string in $AdS_3$ with mixed three form flux.

  13. Estrés en prisión y factores psicosociales

    OpenAIRE

    Ruíz, José Ignacio

    2010-01-01

    El propósito de este trabajo es estudiar las relaciones de determinados factores psicosociales con los niveles de estrés y malestar psicológico en prisión. Una muestra de 60 internos voluntarios de un centro penal respondió una encuesta sobre apoyo social objetivo, clima emocional, valores grupales, sucesos en prisión, participación en actividades en prisión, estrés y malestar psicológico. Como resultado principal se encontró que la percepción de un clima emocional negativo, el conocer más ge...

  14. Understanding the PxS Aspect of Within-Person Variation: A Variance Partitioning Approach

    Directory of Open Access Journals (Sweden)

    Brian eLakey

    2016-01-01

    Full Text Available This article reviews a variance partitioning approach to within-person variation based on Generalizability (G Theory and the Social Relations Model (SRM. The approach conceptualizes an important part of within-person variation as Person x Situation (PxS interactions: differences among persons in their profiles of responses across the same situations. The approach provided the first quantitative method for capturing within-person variation and demonstrated very large PxS effects for a wide range of constructs. These include anxiety, five-factor personality traits, perceived social support, leadership, and task performance. Although PxS effects are commonly very large, conceptual and analytic obstacles have thwarted consistent progress. For example, how does one develop a psychological, versus purely statistical, understanding of PxS effects? How does one forecast future behavior when the criterion is a PxS effect? How can understanding PxS effects contribute to psychological theory? This review describes potential solutions to these and other problems developed in the course of conducting research on the PxS aspect of social support. Additional problems that need resolution are identified.

  15. Understanding the P×S Aspect of Within-Person Variation: A Variance Partitioning Approach.

    Science.gov (United States)

    Lakey, Brian

    2015-01-01

    This article reviews a variance partitioning approach to within-person variation based on Generalizability Theory and the Social Relations Model. The approach conceptualizes an important part of within-person variation as Person × Situation (P×S) interactions: differences among persons in their profiles of responses across the same situations. The approach provided the first quantitative method for capturing within-person variation and demonstrated very large P×S effects for a wide range of constructs. These include anxiety, five-factor personality traits, perceived social support, leadership, and task performance. Although P×S effects are commonly very large, conceptual, and analytic obstacles have thwarted consistent progress. For example, how does one develop a psychological, versus purely statistical, understanding of P×S effects? How does one forecast future behavior when the criterion is a P×S effect? How can understanding P×S effects contribute to psychological theory? This review describes potential solutions to these and other problems developed in the course of conducting research on the P×S aspect of social support. Additional problems that need resolution are identified.

  16. Validity of equation-of-motion approach to kondo problem in the large N limit

    Energy Technology Data Exchange (ETDEWEB)

    Zhu, Jian-xin [Los Alamos National Laboratory; Ting, C S [UNIV OF HOUSTON; Qi, Yunong [UNIV OF HOUSTON

    2008-01-01

    The Anderson impurity model for Kondo problem is investigated for arbitrary orbit-spin degeneracy N of the magnetic impurity by the equation of motion method (EOM). By employing a new decoupling scheme, a self-consistent equation for the one-particle Green function is derived and numerically solved in the large-N approximation. For the particle-hole symmetric Anderson model with finite Coulomb interaction U, we show that the Kondo resonance at the impurity site exists for all N {>=} 2. The approach removes the pathology in the standard EOM for N = 2, and has the same level of applicability as non-crossing approximation. For N = 2, an exchange field splits the Kondo resonance into only two peaks, consist with the result from more rigorous numerical renormalization group (NRG) method. The temperature dependence of the Kondo resonance peak is also discussed.

  17. Elongación de la transcripción en S. cerevisiae el complejo THO y factores relacionados funcionalmente

    OpenAIRE

    García Rondón, Ana

    2003-01-01

    La transcripción es el proceso por el cual se copia la información contenida en el DNA, a una molécula de RNA. Se divide en las etapas de iniciación, en la cual la polimerasa de RNA (RNAP) se une al DNA, abre la doble hélice y comienza la síntesis del RNA

  18. Assessment of N2O emissions from rapeseed cultivation in Poland by various approaches

    Science.gov (United States)

    Syp, Alina; Faber, Antoni; Kozak, Małgorzata

    2016-10-01

    The aim of this study was to compare four tools for calculation of nitrous oxide (N2O) emissions under the renewable energy directive. All the tools follow the methodology of the international panel on climate change. The first calculations of N2O fluxes were based on the Tier 1 method using the BioGrace tool. The second and the third ones followed the Tier 2 methodology, applying the global nitrous oxide calculator and the Lesschen emission factors, respectively. The last assessment was performed in accordance with the Tier 3 approach by using the denitrification- decomposition model. The N2O fluxes were calculated for rapeseed cultivation in a 4-year crop rotation in Poland. The same input data were applied in all methods. The average of N2O emissions varied in the range of 1.99-3.78 kg N2O ha-1 y-1, depending on the approach used (Lesschen emission factors > denitrificationdecomposition > global nitrous oxide calculator > BioGrace). This paper illustrates that, at country level, the Lesschen emission factors method worked as well as the denitrification-decomposition model for Poland. The advantage of this approach is the simplicity of collecting the necessary data, in contrast to process-based modelling. Moreover, the Tier 2 method provides mitigation measures similar to the denitrification-decomposition model, related to crop type, climatic conditions, and management practices.

  19. Freud: Moisés y la religión monoteísta. Recensión

    OpenAIRE

    Roberto Vivero Rodríguez

    2014-01-01

    FREUD, Sigmund, Moisés y la religión monoteista, Esquema del psicoanálisis, y otras obras, Volumen XXIII - (1937-1939) (Buenos Aires/Madrid: Amorrortu, 1980) Revista Observaciones Filosóficas - Nº 19 / 2014 Probablemente, el libro más extraño que escribió y publicó Freud es Moisés y la religión monoteísta. Extraño porque lo publicó, con grandes reticencias, cuando el pueblo judío más ayuda y fortaleza necesitaba; pero más extraño que por la publicación con respecto al contenido y e...

  20. Drenaje francés prefabricado, itinerario para la obtención del marcado CE

    OpenAIRE

    Madurell Fernández, Josep; Navarro Granados, Jordi

    2016-01-01

    El drenaje tipo francés o también llamado subsuperficial contribuye en numerosos aspectos en la mejora de las condiciones para la producción agrícola. El más común de sus usos es captar y conducir el exceso de agua del terreno. A este uso van asociadas mas aportaciones como acortar tiempos tanto de siembra como de recolección, mejorar la aireación en la zona radicular contribuyendo a minimizar enfermedades y también para remediación de suelos con exceso de agroquímicos o sales ...

  1. Caso de estudio. Automatización de Oficinas S.A.

    OpenAIRE

    2006-01-01

    En este caso se presentan las siguientes situaciones : La empresa cuenta con una buena posición e imagen en el negocio de los muebles. Un mercado altamente competitivo. Automatización de Oficinas S.A. posee un producto con altos estándares de calidad. La empresa han presentado una disminución en los márgenes rentabilidad manejados. DESCRIPCION : El caso muestra la situación de la empresa Automatización de Oficinas S.A., una empresa de gran trayectoria nacional, orientada a la comercialización...

  2. Análisis de S por combustión de la muestra. Problema interactivo.

    OpenAIRE

    Milla González, Miguel

    2013-01-01

    El azufre de una muestra puede determinarse por combustión completa y transformación en los óxidos de S que se recogen en una disolución y se oxidan con peróxido de hidrógeno al trióxido. La disolución de ácido sulfúrico resultante se valora con NaOH de molaridad conocida. Para encontrar el porcentaje de S en la muestra debe montarse la expresión de conversión correctamente.

  3. Bis(N-sec-butyl-N-n-propyldithiocarbamato-κ2S,S′(1,10-phenanthroline-κ2N,N′zinc(II

    Directory of Open Access Journals (Sweden)

    Amna Salem Alzaalouk

    2010-09-01

    Full Text Available Two independent but very similar molecules comprise the asymmetric unit of the title compound, [Zn(C8H16NS22(C12H8N2]. The N2S4 donor set about Zn is defined by two symmetrically chelating dithiocarbamate ligands and a 1,10-phenanthroline ligand. Distortions from the ideal octahedral coordination geometry arise from the restricted bite angles of the ligands. The main feature of the crystal packing is the formation of tetrameric supramolecular aggregates mediated by C—H...S interactions. Disorder was found in each of the sec-butyl groups. This was resolved over two positions in each case with the major components of the disorder having site occupancies in the range 0.551 (6–0.725 (5.

  4. On the reactivity of F(3)S[triple bond]NXeF(+): syntheses and structural characterizations of [F(4)S=N-Xe---N[triple bond]SF(3)][AsF(6)], a rare example of a N-Xe-N linkage, and [F(3)S(N[triple bond]SF(3))(2)][AsF(6)].

    Science.gov (United States)

    Smith, Gregory L; Schrobilgen, Gary J

    2009-08-17

    The F(4)S=N-Xe---N[triple bond]SF(3)(+) cation has been synthesized as the AsF(6)(-) salt by rearrangement of [F(3)S[triple bond]NXeF][AsF(6)] in N[triple bond]SF(3) solvent at 0 degrees C. Deep yellow [F(4)S=N-Xe---N[triple bond]SF(3)][AsF(6)], which crystallized from a N[triple bond]SF(3) solution at -10 degrees C, was characterized by Raman spectroscopy (-160 degrees C) and by single-crystal X-ray diffraction (-173 degrees C). The Xe-N bond length (2.079(3) A) of the F(4)S=N-Xe---N[triple bond]SF(3)(+) cation is among the shortest Xe-N bonds presently known. The F(4)S=NXe(+) cation interacts with N[triple bond]SF(3) by means of a Xe---N donor-acceptor bond (2.583(3) A) that is significantly longer than the primary Xe-N bond (2.079(3)A) but significantly shorter than the sum of the Xe and N van der Waals radii (3.71 A). The F(4)S=N-Xe---N[triple bond]SF(3)(+) cation undergoes a redox decomposition in N[triple bond]SF(3) at 0 degrees C, forming [F(3)S(N[triple bond]SF(3))(2)][AsF(6)], cis-N(2)F(2), and Xe, which were characterized by low-temperature Raman spectroscopy in the solid state and by (19)F NMR spectroscopy in N[triple bond]SF(3) solvent (0 degrees C). Colorless [F(3)S(N[triple bond]SF(3))(2)][AsF(6)] crystallized from N[triple bond]SF(3) at -10 degrees C and was characterized by low-temperature, single-crystal X-ray diffraction. The S(IV) atom of F(3)S(N[triple bond]SF(3))(2)(+) has long contacts with the N atoms of two N[triple bond]SF(3) molecules and a F ligand of a neighboring AsF(6)(-) anion. The arrangement of long contacts avoids, to the maximum extent, the F atoms of SF(3)(+) and the nonbonding electron pair situated on the pseudo-3-fold axis opposite the F ligands of SF(3)(+), providing distorted octahedral coordination about the S(IV) atom. Quantum-chemical calculations using MP2, B3LYP, and PBE1PBE methods were employed to arrive at the gas-phase geometries, charges, bond orders, valencies, and vibrational frequencies for F(4)S=N-Xe---N

  5. Maximizing $E \\max_{1 \\leq k \\leq n} S^+_k/ES^+_n$: A Prophet Inequality for Sums of I.I.D. Mean Zero Variates

    OpenAIRE

    Klass, Michael J.

    1989-01-01

    Let $X, X_1, X_2, \\ldots$ be i.i.d. mean zero random variables. Put $S_k = X_1 + \\cdots + X_k$. We prove that for every $n \\geq 1, E \\max_{1 \\leq k \\leq n} S^+_n \\leq (2 - n^{-1})ES^+_n$. This result is nearly sharp, since if $P(X = 1) = P(X = -1) = \\frac{1}{2},$ then $E \\max{1 \\leq k \\leq n} S^+_k = (2 - n^{-1/2}\\gamma^+_n)ES^+_n,$ where $\\lim_{n \\rightarrow \\infty} \\gamma^+_n = \\sqrt{\\pi/2}$.

  6. Reduction of S-N Curves for Ship Structural Details

    Science.gov (United States)

    1992-09-01

    the work of Higashida (B-14). Loading: Constant amplitude, pure axial loading was assumed. A load ratio of R=0 was assumed. This assumption diminishes...Williams and S. Liu, Volume III, Part A pp 689-699. B-12. Lawrence, F.V., Jr.; R.S. Mattos; Y. Higashida ; and J.D. Burk. (1978) "Estimating the Fatigue...Report No. 105, University of Illinois. B-14. Higashida , Y.; J.D. Burk; and F.V. Lawrence, Jr. (1987) "Strain-Controlled Fatigue Behavior of ASTM A36

  7. Corrosión atmosférica en el volcán Poás, proyecto TROPICORR

    Directory of Open Access Journals (Sweden)

    Juan Fernando Álvarez Castro

    Full Text Available Se estudia la corrosión de diferentes materiales, tanto en condiciones a la intemperie (outdoor, como abrigo (indoor en el volcán Poás. Esta última condición en forma cuantitativa en el marco del proyecto internacional denominado TROPICORR del CYTED, en el cual se participa, y que tiene como interés estudiar la corrosión de materiales metálicos utilizados en la industria electro-electrónica en ambientes tropicales. En el marco de este proyecto, Costa Rica participa con la estación de Poás, cuyos resultados se muestran en este trabajo, así como en una estación en Limón. El efecto de los gases emanados por el volcán Poás afectan fuertemente a los materiales metálicos e inclusive su efectose aprecia en la vegetación de zonas aledañas al cráter del volcán, donde se puede notar la ausencia completa de esta, en la zona de la pluma de los vientos. Las condiciones que afectan a la corrosión atmosférica son la temperatura, la humedad, el tiempo de humectación (donde la temperatura es mayor a 0 oC y 80 %HR y contaminantes, especialmente cloruros y SO2. En el caso de Costa Rica, ubicada en la latitud 10o Norte, y por su ubicación geográfica, entre dos océanos y con una formación montañosa en el centro del país, en donde se encuentran varios volcanes, como el Poás, el cual tienen temperaturas mayores a 0 oC todo el año y humedades elevados, así como contaminantes, entre ellos el SO2, en especial en las zonas volcánicas activas y cloruros en las costas. Los personeros del parque volcán Poás están interesados en que se estudie la corrosión en dicha zona, pues esta es muy elevada, e incluso el edificio principal para turistas tuvo que ser reconstruido hace algunos años. En dicho edificio se pueden encontrar zonas con corrosión en el concreto, en diferentes materiales metálicos expuestos, como pasamanos, clavos y cables eléctricos, además de un gran deterioro en las pinturas por la misma causa. Esta situación es

  8. Non-blinking (Zn)CuInS/ZnS Quantum Dots Prepared by In Situ Interfacial Alloying Approach

    Science.gov (United States)

    Zhang, Aidi; Dong, Chaoqing; Li, Liang; Yin, Jinjin; Liu, Heng; Huang, Xiangyi; Ren, Jicun

    2015-10-01

    Semiconductor quantum dots (QDs) are very important optical nanomaterials with a wide range of potential applications. However, blinking behavior of single QD is an intrinsic drawback for some biological and photoelectric applications based on single-particle emission. Herein we present a rational strategy for fabrication of non-blinking (Zn)CuInS/ZnS QDs in organic phase through in situ interfacial alloying approach. This new strategy includes three steps: synthesis of CuInS QDs, eliminating the interior traps of QDs by forming graded (Zn)CuInS alloyed QDs, modifying the surface traps of QDs by introducing ZnS shells onto (Zn)CuInS QDs using alkylthiols as sulfur source and surface ligands. The suppressed blinking mechanism was mainly attributed to modifying QDs traps from interior to exterior via a step-by-step modification. Non-blinking QDs show high quantum yield, symmetric emission spectra and excellent crystallinity, and will enable applications from biology to optoelectronics that were previously hindered by blinking behavior of traditional QDs.

  9. Integración, cooperación y proyección exterior del sector cárnico-ganadero holandés

    NARCIS (Netherlands)

    Maas, J.H.M.; Segrelles Serrano, J.A.

    1996-01-01

    La ganadería y la producción de carne constituyen la actividad más importante del complejo agroalimentario holandés, con gran influencia en la economía del país. Se trata de un sector en constante adaptación a la demanda,muy tecnificado y dinámico, apoyado desde el punto de vista financiero, donde

  10. Integración, cooperación y proyección exterior del sector cárnico-ganadero holandés

    NARCIS (Netherlands)

    Maas, J.H.M.; Segrelles Serrano, J.A.

    1996-01-01

    La ganadería y la producción de carne constituyen la actividad más importante del complejo agroalimentario holandés, con gran influencia en la economía del país. Se trata de un sector en constante adaptación a la demanda,muy tecnificado y dinámico, apoyado desde el punto de vista financiero, donde e

  11. Valorización de la empresa Interconexión Eléctrica S.A. E.S.P. - ISA

    OpenAIRE

    Fajardo Londoño, Oscar William; Seyd Velasco, Hans Edward

    2014-01-01

    Interconexión Eléctrica S.A. E.S.P. – ISA, es la Compañía de transporte de energía con mayor participación en el mercado de transporte de energía de Colombia y una de las compañías colombianas con mayor crecimiento y expansión en Latinoamérica con presencian en países como Brasil, Perú, Chile, Bolivia, Ecuador, Argentina y Panamá, pese a su crecimiento y expansión en Latinoamérica y sus positivos resultados financieros, el precio de la acción ha sido “castigada” por el mercado a raíz de difer...

  12. VALORACIÓN ECONÓMICA POR LA REHABILITACIÓN DEL RÍO AXTLA, S.L.P.

    OpenAIRE

    Ramón Valdivia-Alcalá; Emiliano García-Avalos; Marco Andrés López-Santiago; Juan Hernández-Ortíz; Abraham Rojano-Aguilar

    2011-01-01

    En este trabajo se muestran los resultados de la disposición a pagar (DAP) por la protección, mantenimiento y mejora del río Axtla, por parte de los habitantes de Axtla de Terrazas, San Luis Potosí. Esto se llevó a cabo a través del método de valoración contingente con formato referéndum (MVCR). Los resultados obtenidos se analizaron mediante técnicas de regresión logística vía máxima verosimilitud. Se concluye que las variables ingreso familiar, educación y afectación por la contaminación in...

  13. Improving estimates of N2O emissions for western and central Europe using a Bayesian inversion approach

    Science.gov (United States)

    Thompson, R. L.; Gerbig, C.; Roedenbeck, C.; Heimann, M.

    2009-04-01

    The nitrous oxide (N2O) mixing ratio has been increasing in the atmosphere since the industrial revolution, from 270 ppb in 1750 to 320 ppb in 2007 with a steady growth rate of around 0.26% since the early 1980's. The increase in N2O is worrisome for two main reasons. First, it is a greenhouse gas; this means that its atmospheric increase translates to an enhancement in radiative forcing of 0.16 ± 0.02 Wm-2 making it currently the fourth most important long-lived greenhouse gas and is predicted to soon overtake CFC's to become the third most important. Second, it plays an important role in stratospheric ozone chemistry. Human activities are the primary cause of the atmospheric N2O increase. The largest anthropogenic source of N2O is from the use of N-fertilizers in agriculture but fossil fuel combustion and industrial processes, such as adipic and nitric acid production, are also important. We present a Bayesian inversion approach for estimating N2O fluxes over central and western Europe using high frequency in-situ concentration data from the Ochsenkopf tall tower (50 °01′N, 11 °48′, 1022 masl). For the inversion, we employ a Lagrangian-type transport model, STILT, which provides source-receptor relationships at 10 km using ECMWF meteorological data. The a priori flux estimates used were from IER, for anthropogenic, and GEIA, for natural fluxes. N2O fluxes were retrieved monthly at 2 x 2 degree spatial resolution for 2007. The retrieved N2O fluxes showed significantly more spatial heterogeneity than in the a priori field and considerable seasonal variability. The timing of peak emissions was different for different regions but in general the months with the strongest emissions were May and August. Overall, the retrieved flux (anthropogenic and natural) was lower than in the a priori field.

  14. Corrupción y regeneración: Víctor Andrés Belaunde y «La crisis presente»

    Directory of Open Access Journals (Sweden)

    Santiváñez Vivanco, Martín

    2014-04-01

    Full Text Available Víctor Andrés Belaunde, one of the most relevant thinkers of Latin American Arielism, held that it was necessary to combine institutional design with a regeneration of values, as a solution to the political crisis that Peru was experiencing. Thus, the combination of institutional design and axiological or ethical vitalism created a holistic approach that introduced into the public debate a vision of integral development in which the fight against corruption and institutional problems could be addressed, in a complementary way, from an ethical perspective. This dimension served to strengthen the construction of an inclusive State, one of the political objectives of the Arielian generation.Víctor Andrés Belaunde, uno de los pensadores más relevantes del arielismo latinoamericano, sostuvo la necesidad de combinar el diseño institucional con una regeneración valorativa como remedio a la crisis política que atravesaba el Perú. Así, la combinación de diseño institucional y vitalismo axiológico configuró un enfoque sintético que introdujo en la discusión pública una visión de desarrollo integral en el que la lucha contra la corrupción y los problemas institucionales podían ser abordados, de manera complementaria, desde una perspectiva ética. Tal dimensión servía para fortalecer la construcción de un Estado inclusivo, uno de los objetivos políticos de la generación arielista.

  15. Caracterizaci??n del fenotipo muscular en la EPOC y sepsis en pacientes : estructura fibrilar, inflamaci??n, estr??s oxidativo y regeneraci??n

    OpenAIRE

    Pascual Gu??rdia, Sergi, 1979-

    2015-01-01

    La inflamaci??n y el estr??s oxidativo son mecanismos moleculares que contribuyen al da??o y a la disfunci??n muscular. Existen procesos cr??nicos con fen??menos inflamatorios de bajo grado pero de larga duraci??n (EPOC, con o sin p??rdida de peso), as?? como situaciones cl??nicas con liberaci??n aguda de gran cantidad de mol??culas proinflamatorias (Sepsis). Los mecanismos de regeneraci??n del m??sculo en ambas entidades son esenciales para la correcta recuperaci??n funcional y pueden condic...

  16. On the pole content of coupled channels chiral approaches used for the K bar N system

    Science.gov (United States)

    Cieplý, A.; Mai, M.; Meißner, Ulf-G.; Smejkal, J.

    2016-10-01

    Several theoretical groups describe the antikaon-nucleon interaction at low energies within approaches based on the chiral SU(3) dynamics and including next-to-leading order contributions. We present a comparative analysis of the pertinent models and discuss in detail their pole contents. It is demonstrated that the approaches lead to very different predictions for the K- p amplitude extrapolated to subthreshold energies as well as for the K- n amplitude. The origin of the poles generated by the models is traced to the so-called zero coupling limit, in which the inter-channel couplings are switched off. This provides new insights into the pole contents of the various approaches. In particular, different concepts of forming the Λ (1405) resonance are revealed and constraints related to the appearance of such poles in a given approach are discussed.

  17. Realizing an Optimization Approach Inspired from Piaget’s Theory on Cognitive Development

    Directory of Open Access Journals (Sweden)

    Utku Kose

    2015-09-01

    Full Text Available The objective of this paper is to introduce an artificial intelligence based optimization approach, which is inspired from Piaget’s theory on cognitive development. The approach has been designed according to essential processes that an individual may experience while learning something new or improving his / her knowledge. These processes are associated with the Piaget’s ideas on an individual’s cognitive development. The approach expressed in this paper is a simple algorithm employing swarm intelligence oriented tasks in order to overcome single-objective optimization problems. For evaluating effectiveness of this early version of the algorithm, test operations have been done via some benchmark functions. The obtained results show that the approach / algorithm can be an alternative to the literature in terms of single-objective optimization.The authors have suggested the name: Cognitive Development Optimization Algorithm (CoDOA for the related intelligent optimization approach.

  18. Generalización e inferencia: un acercamiento a su compresión desde tres enfoques / Generalization and inference: an understanding based on three approaches

    Directory of Open Access Journals (Sweden)

    Fernando Peñaranda C

    2014-05-01

    Full Text Available Se trata de una reflexión que busca poner en discusión los diferentes significados que pueden adquirir los conceptos de generalización e inferencia, de acuerdo con el enfoque o perspectiva desde el cual se pretendan utilizar. Para este propósito, en primer lugar, se pone en consideración la importancia y el uso que se ha dado a estos conceptos en el campo de la epidemiología clásica-moderna, especialmente para definir asuntos de validez interna y externa y para la formulación de hipótesis. Seguidamente, se presentan las principales argumentaciones que al respecto defiende Clifford Geertz desde su perspectiva epistemológica de la etnografía interpretativista y de acuerdo con su concepción teórica de la cultura. Posteriormente, se presentan las ideas que sustenta Juan Samaja desde su enfoque epistemológico y metodológico para la investigación en salud, abogando principalmente por el razonamiento abductivo, y no sólo el inductivo y el deductivo que han sido privilegiados en los estudios lógicos. Por último se presenta una discusión y unas conclusiones destacando que en estas tres perspectivas la salud pública tiene una oportunidad para enriquecer sus procesos de generación de nuevo conocimiento y para comprender de mejor manera las condiciones de salud y de bienestar colectivo This paper is a reflection which seeks to stimulate discussion and debate concerning the different meanings that the concepts of generalization and inference can take on, based on the approach or perspective that is being employed. For this purpose the importance and usage which has been accorded to these concepts within the field of classic-modern epidemiology is taken into consideration, especially in order to define internal and external validity issues and to formulate hypotheses. Next the main arguments are presented and are defended by Clifford Geertz from his epistemological perspective of interpretive ethnography and based on his theoretical

  19. Social Media’s Function in Organizations: A Functional Analysis Approach

    Directory of Open Access Journals (Sweden)

    Amy Reitz

    2012-12-01

    Full Text Available System theorists believe that organizations that function as an open system have a greater chance of survival than organizations that function as a closed system due to the exchange of inputs and outputs between the organization and its publics. Public relations researchers have proposed adopting a dialogic approach to public relations where interaction between the organization and its publics are mutual, which is the underpinning to an open systems approach. This paper posits that organizations can function within an open systems approach to public relations by employing social media. Adoption of a functional approach is a fruitful way to look at the social functions various social media serve in the system of organizations and their publics. Research has considered the gratifications publics receive from social media; however, limited research has considered what social media do for the organization-public relationship system. It has been argued that organizations also have psychological and social motivations; therefore, applying a functional analysis approach might be a good of way determining what functions social media serve in the organization-public relationship system. Four functions are proposed in which social media may serve the system: maintenance of organizational identity, opportunity to build relationships with publics, ability to control issues management, and the chance to promote social corporate responsibility. Understanding social media’s role in the system can help practitioners identify the functions that may contribute to an open systems approach to public relations and ultimately an organization’s survival.

  20. Relación entre violencia de pareja y estrés parental en población mexicana

    OpenAIRE

    Carlos Adrián BRITO-TINAJERO; Leonor Guadalupe DELGADILLO-GUZMÁN; Angela NIEVAR

    2016-01-01

    Esta investigación surge como sub-producto del convenio de investigación UNTUAEMéx4 ; con el objetivo de explicar la relación que existe entre la violencia de pareja y el estrés parental en mujeres mexicanas a través de las escalas: Escala de Tácticas de conflicto y Escala de estrés parental a 319 madres o mujeres encargadas del cuidado de los niños(as) dentro de los tres primeros años de primaria en educación pública del Estado de México. Se encontró positivamente correlacionada la Violencia...

  1. The Army’s Approach to Property Accountability: A Strategic Assessment

    Science.gov (United States)

    2012-02-07

    States Army Dr. Richard M. Meinhart Project Adviser This SRP is submitted in partial fulfillment of the requirements of the...The Army’s Approach to Property Accountability: A Strategic Assessment by Colonel Thomas Rivard United States Army ...United States Army War College Class of 2012 DISTRIBUTION STATEMENT: A Approved for Public Release Distribution is Unlimited This

  2. H(infinity) output tracking control for nonlinear systems via T-S fuzzy model approach.

    Science.gov (United States)

    Lin, Chong; Wang, Qing-Guo; Lee, Tong Heng

    2006-04-01

    This paper studies the problem of H(infinity) output tracking control for nonlinear time-delay systems using Takagi-Sugeno (T-S) fuzzy model approach. An LMI-based design method is proposed for achieving the output tracking purpose. Illustrative examples are given to show the effectiveness of the present results.

  3. A focus on educational choice in the light of Sen’s capability approach

    DEFF Research Database (Denmark)

    Skovhus, Randi Boelskifte

    2016-01-01

    This presentation demonstrates that in Denmark there is considerable focus on educational and career choices during the last year of lower-secondary school, and investigates the possibility of using Amartya Sen’s capability approach as a lens to analyse this focus. It is argued that attention...

  4. John Dewey’s theory of democracy and its links with the heterodox approach to economics.

    Directory of Open Access Journals (Sweden)

    Arturo Hermann

    2011-07-01

    Full Text Available John Dewey is one of the most significant figures in pragmatist philosophy, an approach which he systematically applied to the study of economic, social and cultural structure. In our work, we will focus on the main aspects of Dewey’s approach to the study of aspects that make up “human nature” and how do they interact with the characteristics of the cultural context. We will illustrate how the concepts elaborated by Dewey can contribute to the heterodox analysis of a host of economic and social issues. Dewey highlights the crucial role of public policies for facilitating the development of volunteer associations in all areas of the social structure. In the analysis of these aspects, Dewey’s key contribution lies in removing the concepts of democracy and participation from the limbo of abstraction in which they tended to be confined by previous approaches and connecting them to the evolution of economic and social forms.

  5. (2,2′-Bipyridylbis[N,N-bis(2-hydroxyethyldithiocarbamato-κ2S,S′]cadmium(II

    Directory of Open Access Journals (Sweden)

    Edward R. T. Tiekink

    2009-12-01

    Full Text Available The title compound, [Cd(C5H10NO2S22(C10H8N2], features a trigonal-prismatic coordination geometry for the CdII ion, based on an N2S4 donor set defined by two chelating dithiocarbamate ligands and a 2,2′-bipyridyl ligand. In the crystal, extensive O—H...O hydrogen bonding results in the formation of 12-membered {...HO}6 synthons and one-dimensional supramolecular chains with further O—H...S interactions providing additional stability to the linear chain with base vector [01overline{1}].

  6. Adquisición de vocabulario en inglés en un aula de Educación Primaria.

    OpenAIRE

    Sancho García, Elda

    2015-01-01

    Este trabajo hace referencia a la adquisición de vocabulario en una segunda lengua y consta de dos partes. En la primera nos ocupamos, de forma más general, de las teorías del aprendizaje e una segunda lengua, centrando nuestra atención en la adquisición de vocabulario y teniendo en cuenta las principales técnicas de enseñanza y aprendizaje del mismo. En la segunda parte se presentan un conjunto de actividades para enseñar vocabulario a los niños del primer curso de Educación Primaria relacio...

  7. cis-Dichlorido(dimethyl sulfoxide-κS(N,N,N′,N′-tetramethylguanidine-κN′′platinum(II

    Directory of Open Access Journals (Sweden)

    Ivan I. Eliseev

    2013-02-01

    Full Text Available In the title compound, cis-[PtCl2(C5H13N3(C2H6OS], the four-coordinate PtII atom is bonded to one N atom of the N,N,N′,N′-tetramethylguanidine ligand, one dimethyl sulfoxide S atom and two chloride ligands, forming a cis-square-planar geometry. The bond lengths and angles of the N—Pt—Cl functionality are typical for imine dichloridoplatinum(II complexes. The H atom of the imino group is oriented towards the O atom of the sulfoxide group of a neighboring molecule and forms an N—H...O hydrogen bond.

  8. Generalised structures for N=1 AdS backgrounds

    Energy Technology Data Exchange (ETDEWEB)

    Coimbra, André [Institut für Theoretische Physik & Center for Quantum Engineering and Spacetime Research,Leibniz Universität Hannover,Appelstraße 2, 30167 Hannover (Germany); Strickland-Constable, Charles [Institut de physique théorique, Université Paris Saclay, CEA, CNRS, Orme des Merisiers, F-91191 Gif-sur-Yvette (France)

    2016-11-16

    We expand upon a claim made in a recent paper [http://arxiv.org/abs/1411.5721] that generic minimally supersymmetric AdS backgrounds of warped flux compactifications of Type II and M theory can be understood as satisfying a straightforward weak integrability condition in the language of E{sub d(d)}×ℝ{sup +} generalised geometry. Namely, they are spaces admitting a generalised G-structure set by the Killing spinor and with constant singlet generalised intrinsic torsion.

  9. Plan integral de gestión ambiental de residuos sólidos en Atacocha

    OpenAIRE

    Huayta Dávalos, Isaac Jorge

    2006-01-01

    Compañía Minera Atacocha, elabora su Evaluación Ambiental Preliminar (EVAP) en el año 1995, resultado de la identificación de aspectos ambientales significativos, en 1996 presenta el Programa de Adecuación y Manejo Ambiental (PAMA), el mismo que considera como uno de los proyectos importantes, el mejoramiento en el manejo de los residuos sólidos domésticos e industriales. La segregación en origen, recolección, transporte, clasificación y disposición final de residuos orgánicos se inicia en...

  10. Inclusión del alumnado a través del juego cooperativo

    OpenAIRE

    Durán García, Ione

    2014-01-01

    El Trabajo de Fin de Grado (TFG) que se expone a continuación aborda la temática de la cooperación para solventar problemas de inclusión en el área de Educación Física, así como mejorar el clima del grupo-clase a través del juego cooperativo. Este proyecto se ha centrado en un grupo de 4º de Educación Primaria en el cual se da un caso de exclusión de un alumno que padece el síndrome de Asperger, el cual manifiesta problemas de socialización e integración. También se quiere combatir la comp...

  11. Synthesis, characterization and single crystal X-ray analysis of chlorobis(N,N-dimethyldithiocarbamato-S,S′antimony(III

    Directory of Open Access Journals (Sweden)

    H.P.S. Chauhan

    2015-07-01

    Full Text Available The title compound chlorobis(N,N-dimethyldithiocarbamato-S,S′antimony(III has been prepared in distilled acetonitrile and characterized by physicochemical [melting point and molecular weight determination, elemental analysis (C, H, N, S & Sb], spectral [FT–IR, far IR, NMR (1H & 13C] studies. The crystal and molecular structure was further confirmed using single crystal X-ray diffraction analysis which features a five-coordinate geometry for antimony(III within a ClS4 donor set. The distortion in the co-planarity of ClSbS3 evidences the stereochemical influence exerts by the lone pair of electrons on antimony(III. Two centrosymmetrically related molecule held together via C–H···Cl secondary interaction result in molecular aggregation of the compound.

  12. A Study on Recent Approaches in Handling DDoS Attacks

    CERN Document Server

    Mukhopadhyay, Debajyoti; Shim, Sang-Heon; Kim, Young-Chon

    2010-01-01

    In this paper, we present a study on the recent approaches in handling Distributed Denial of Service (DDoS) attacks. DDoS attack is a fairly new type of attack to cripple the availability of Internet services and resources. A DDos attack can originate from anywhere in the network and typically overwhelms the victim server by sending a huge number of packets. Several remedial measures have been proposed by various researchers. This paper attempts to discuss the recent offerings to handle the DDoS attacks.

  13. An Alternative Paradigm for Evidence-Based Medicine: Revisiting Lawrence Weed, MD’s Systems Approach

    Science.gov (United States)

    Shukor, Ali Rafik

    2017-01-01

    Lawrence Weed, MD, is renowned for being the father of the Problem-Oriented Medical Record (POMR), the medical care standard for collecting, managing, and contextualizing patient data in medical records. What have been consistently overlooked are his teachings on knowledge coupling, which refers to matching patient data with associated medical knowledge. Together, the POMR standard and knowledge coupling are meant to form the basis of a systems approach that enables individualized evidence-based decision making within the context of multimorbidity and patient complexity. The POMR and knowledge coupling tools operationalize a problem-oriented model that reflects a sophisticated general systems theoretical approach to knowledge. This paradigm transcends reductionist approaches to knowledge by depicting how the meaning of specific entities (eg, disease constructs) and their associated probabilities can only be understood within their respective spatiotemporal and biopsychosocial relational contexts. Rigorous POMRs therefore require knowledge inputs from a network of interconnections among specific entities, which Dr Weed enabled through development of the Knowledge Net standard. The Knowledge Net’s relational structure determines the applicability of knowledge within specific patient contexts. To enable the linkage of unique combinations of data in individual patient POMRs with existing medical knowledge structured in Knowledge Nets, Dr Weed developed the Knowledge Coupling standard. Dr Weed’s standards for record keeping and knowledge coupling form the basis of a combinatorial approach to evidence-based medicine that fulfills Stange’s call for a science of connectedness. Ensuing individualized processes of care become the dynamo powering a learning health care system that enables a co-construction of health premised on empowerment and intelligent human decision making, rather than promoting the artificial intelligence of tools. If the value of Engel’s

  14. The multiple scattering and N-body approaches to nuclear reactions

    Science.gov (United States)

    Picklesimer, A.; Tandy, P. C.; Thaler, R. M.

    1983-02-01

    The relationship between conventional multiple scattering approaches and the recently developed N-body approaches to nuclear reactions is considered with a view towards elastic scattering applications. Connectivity expansions in the N-body approach and multiple scattering expansions in the Watson approach are developed by a common technique so that a comparison of the physical content of each can be made. In the N-body case this leads to a new derivation of the equations of Bencze, Redish, and Sloan in both particle-labelled and partition-labelled form and this yields new insight into the minimal dimensionality of these equations and into the role of channel coupling schemes within this formulation. The relative simplicity and generality with which these results are obtained is designed to be easily understood by those unfamiliar with N-body formalisms. The two approaches are contrasted first for the three-particle problem and subsequently for the many-body problem. We argue that a strict adherence to the connected-kernel property which is advantageous for the three-particle problem may not be so advantageous for the many-body elastic scattering problem. Undesirable physical characteristics of the connectivity expansion for elastic scattering are identified and their rectification is discussed. The off-shell transformation associated with the N-body approach is examined critically. The origin of the multiplicity of N-body coupling schemes is elucidated. It is shown that a modified concept of connectivity, called inclusive connectivity, can be introduced to guide expansions which can be truncated in a physically meaningful way. The inclusive connectivity expansion is seen to be identical to the spectator expansion for an elementary projectile but differs in the case of a composite projectile. Extant elastic scattering optical potential formulations based on the two concepts of connectivity are compared and contrasted. We show that connected kernel integral equations

  15. La e-evaluación de aprendizajes en educación superior a través de aulas virtuales síncronas

    Directory of Open Access Journals (Sweden)

    Rocío Yuste Tosina

    2012-10-01

    Full Text Available En el presente trabajo de investigación se somete a estudio un sistema de evaluación de los aprendizajes en enseñanza a distancia en el que, combinando un tipo de evaluación virtual pedagógicamente innovadora y el uso de aulas virtuales síncronas, con videoconferencia, pueda acreditarse un modelo fiable y garante de evaluación de los procesos de enseñanza/aprendizaje para actividades de e-learning universitarias. El modelo se ha probado en un curso online de Especialista en Educación Secundaria dirigido a titulados universitarios españoles, portugueses y latinoamericanos. Desde una perspectiva metodológica cualitativa, se diseñó una investigación cuyos participantes han sido el profesorado y el alumnado protagonistas de la formación, así como evaluadores externos. Durante todo el proceso se han cuidado especialmente los aspectos relacionados con la credibilidad, consistencia y confirmabilidad de los datos obtenidos, extrayendo de modo inductivo un sistema de categorías y subcategorías que representan la evaluación de los aprendizajes en procesos formativos online. Los resultados confirman que se ha avanzado en la consecución de un modelo innovador de e-evaluación viable, eficaz y que garantiza su aplicación en enseñanza superior a distancia. Asimismo, el uso de videoconferencias y de las aulas virtuales síncronas para realizar entrevistas de eevaluación ha resultado ser un instrumento eficaz en espacios virtuales de aprendizaje. De cualquier modo, se evidencia la necesidad de continuar experimentando este modelo en otros escenarios educativos.

  16. Comités e indexación

    Directory of Open Access Journals (Sweden)

    John Harold Estrada Montoya

    2015-08-01

    Full Text Available Acta Odontológica ColombianaISSN - 2027-7822 | DOI: 10.15446/aocADMITIDA EN:Índice de Publicaciones Científicas y Tecnológicas, PUBLINDEX. Colciencias, Categoría C.http://publindex.colciencias.gov.co:8084/publindex/jsp/content/bbnp.jspSistema Regional de información en Línea para Revistas Científicas de América Latina, El Caribe, España y Portugal, LATINDEX. http://www.latindex.unam.mx/buscador/ficRev.html?opcion=1&folio=17390 Directory of Open Access Journals. DOAJ. doaj.org

  17. Arquitectura sismo-resistente. Un nuevo enfoque para la solución integral del problema sísmico

    Directory of Open Access Journals (Sweden)

    Giuliani,, Hugo

    1987-02-01

    Full Text Available This work only pretend to state in general terms the reasons, foundations, objectives, action fields, basical principles and compatibilization rules of the Structural Design with the Architectural Design that have allowed us to draw an approach on Seismo-Resistant Architecture and that in the future will allow its study and scientific development.

    El presente trabajo, sólo pretende la formulación en términos generales de las razones, fundamentos, objetivos, campos de acción, principios básicos y pautas de compatibilización del Diseño Estructural con el Diseño Arquitectónico que nos han permitido plantear una Arquitectura Sismo-Resistente y que permitirá en el futuro su profundización y el desarrollo científico de la misma.

  18. EL MODELO DE CONTROL DE GESTIÓN MIGRATORIA FRANCÉS: UNA EXTENSIÓN DEL SISTEMA PENAL

    Directory of Open Access Journals (Sweden)

    Natalia Debandi

    Full Text Available Resumen Este artículo se desprende de la tesis doctoral realizada sobre las políticas y prácticas de expulsión de migrantes en Francia. En primer lugar, se propone la expulsión de extranjeros como un dispositivo de seguridad2 que se concentrará especialmente en una parte de la población, los migrantes, catalogados como necesarios o excedente en función de los lineamientos que impone el mercado. Este dispositivo post-disciplinario se puede concebir como parte del sistema penal, conjugando con éste mecanismos y modalidades de intervención al mismo tiempo que se deslinda del peso burocrático y simbólico que éste ha adquirido. Esto se comprueba por ejemplo con la trasferencia del “publico” de un mecanismo al otro, es decir desde la prisión hacia los centros, a partir de la instauración del dispositivo de expulsión, pero también por medio de las prácticas y los innumerables puntos de contacto. Se señala asimismo el caso francés como un modelo de gestión migratoria que presenta características propias y distintivas de otras formas de gestión.

  19. Baja visión en Colombia: una situación invisible para el país

    Directory of Open Access Journals (Sweden)

    María del Pilar Oviedo C

    2015-02-01

    Full Text Available Objetivo: analizar las condiciones de la normatividad formulada frente al tema de la salud visual en el país, como un aspecto importante y clave para el estudio del acceso potencial a los servicios de rehabilitación en baja visión en Colombia. Metodología: estudio descriptivo de tipo cualitativo, que abordó los elementos relacionados con las políticas de salud visual, teniendo en cuenta el modelo teórico propuesto por Andersen y colaboradores. Se realizaron 38 entrevistas a profesionales de las instituciones prestadoras del servicio y entes gubernamentales de seis ciudades del país, para efectos de la investigación se tuvo en cuenta las fases de la política y se utilizó diseño metodológico de Taylor & Bogdan para el análisis de las entrevistas. Resultados: existe una invisibilidad de la baja visión desde las Políticas Públicas en salud visual lo cual ha impactado de manera negativa en el reconocimiento de la misma como un problema social que requiere ser intervenido. Por lo tanto, no existe ningún tipo de cobertura para su rehabilitación a través del sistema general de seguridad social en salud. Conclusión: la ausencia de iniciativas específicas en rehabilitación visual se constituye en barrera para el acceso de la población con baja visión a la prestación de servicios de salud visual, suministro de ayudas ópticas y rehabilitación visual, lo que repercute de manera negativa en la calidad de vida de este grupo poblacional.

  20. Absence of S[subscript N]1 Involvement in the Solvolysis of Secondary Alkyl Compounds

    Science.gov (United States)

    Murphy, Thomas J.

    2009-01-01

    There are significant contradictions in undergraduate organic chemistry textbooks as to the mechanism of nucleophilic substitution reactions at saturated secondary carbons. Some texts say that only the S[subscript N]2 mechanism operates, others say that solvolysis reactions go entirely by the S[subscript N]1 mechanism, while most texts say that…

  1. Novel ketene N,S-acetals : synthesis and reactions of 1-isocyano-1-arylthioethenes.

    NARCIS (Netherlands)

    Hemert, Antonius Wilhelmus van

    1987-01-01

    This thesis deals with a new type of ketene N,S-acetals. It concerns compounds of the general structure 62, in which an arylthio group and an isocyano group are attached to the same carbon atom of a C,C double bond. These compounds are in a way N,S-acetals of ketenes. ... Zie: Summary

  2. Planificación estratégica Aceites Sureste S.L.

    OpenAIRE

    Sánchez Muñoz, Diego

    2013-01-01

    El tema del trabajo fin de grado planteado tiene como finalidad, elaborar un modelo de planificación estratégica para la microempresa “Aceites Sureste S.L”, con la finalidad de poder formular estrategias para el logro de objetivos mediante el ajuste más apropiado de la organización con su entorno. Actualmente nos encontramos en escenarios de alto nivel de exigencias y muy competitivos, tener éxito ya no es cuestión de ser emprendedor o tener visión empresarial, además de que el empresario ...

  3. Plasmaa tuottavan järjestelmän sähköisen toiminnan optimointi

    OpenAIRE

    Antila, Olli-Pekka

    2014-01-01

    Tässä opinnäytetyössä tutustuttiin dielectric-barrier discharge (DBD) –tyyppisen plasmajärjestelmän sähköiseen toimintaan. Työn suorituspaikka oli Dublin Institute of Technology (DIT, Irlanti), jossa DBD-plasmajärjestelmällä tehdään tutkimusta mm. erilaisten marjojen ja muiden tuoretuotteiden säilyvyyden parantamiseksi. Tavoitteena oli tuottaa aineisto plasmajärjestelmän sähköistä toimintaa kuvaavista parametreista erilaisten fyysisten suureiden suhteen. Lisäksi aineisto haluttiin tuottaa kah...

  4. Estrés, respuestas de afrontamiento e ideación suicida en adolescentes

    OpenAIRE

    Serrano Pereira, Mario Gerardo; Universidad Autónoma de Yucatán; Flores Galaz, Mirta Margarita; Universidad Autónoma de Yucatán

    2014-01-01

    El presente estudio tuvo como objetivo determinar la relación entre el estrés, el afrontamiento de los problemas y la ideación suicida en adolescentes. Participaron 370 sujetos, hombres y mujeres seleccionados probabilísticamente de escuelas secundarias y preparatorias. Se aplicaron las escalas de estrés, respuestas de afrontamiento e ideación suicida adaptadas por González-Forteza. Los resultados indican que a mayor estrés con la pareja, mayor ideación suicida en los hombres. En las mujeres,...

  5. Multi Layer Approach to Defend DDoS Attacks Caused by Spam

    CERN Document Server

    Nagamalai, Dhinaharan; Lee, Jae Kwang

    2010-01-01

    Corporate mail services are designed to perform better than public mail services. Fast mail delivery, large size file transfer as an attachments, high level spam and virus protection, commercial advertisement free environment are some of the advantages worth to mention. But these mail services are frequent target of hackers and spammers. Distributed Denial of service attacks are becoming more common and sophisticated. The researchers have proposed various solutions to the DDOS attacks. Can we stop these kinds of attacks with available technology? These days the DDoS attack through spam has increased and disturbed the mail services of various organizations. Spam penetrates through all the filters to establish DDoS attacks, which causes serious problems to users and the data. In this paper we propose a multilayer approach to defend DDoS attack caused by spam mails. This approach is a combination of fine tuning of source filters, content filters, strictly implementing mail policies, educating user, network monit...

  6. Towards a Unifying View of QoS-Enhanced Web Service Description and Discovery Approaches

    CERN Document Server

    Petrova-Antonova, Dessislava; 10.4204/EPTCS.2.8

    2009-01-01

    The number of web services increased vastly in the last years. Various providers offer web services with the same functionality, so for web service consumers it is getting more complicated to select the web service, which best fits their requirements. That is why a lot of the research efforts point to discover semantic means for describing web services taking into account not only functional characteristics of services, but also the quality of service (QoS) properties such as availability, reliability, response time, trust, etc. This motivated us to research current approaches presenting complete solutions for QoS enabled web service description, publication and discovery. In this paper we present comparative analysis of these approaches according to their common principals. Based on such analysis we extract the essential aspects from them and propose a pattern for the development of QoS-aware service-oriented architectures.

  7. Phase fluctuations in a strongly disordered s-wave NbN superconductor close to the metal-insulator transition.

    Science.gov (United States)

    Mondal, Mintu; Kamlapure, Anand; Chand, Madhavi; Saraswat, Garima; Kumar, Sanjeev; Jesudasan, John; Benfatto, L; Tripathi, Vikram; Raychaudhuri, Pratap

    2011-01-28

    We explore the role of phase fluctuations in a three-dimensional s-wave superconductor, NbN, as we approach the critical disorder for destruction of the superconducting state. Close to critical disorder, we observe a finite gap in the electronic spectrum which persists at temperatures well above T(c). The superfluid density is strongly suppressed at low temperatures and evolves towards a linear-T variation at higher temperatures. These observations provide strong evidence that phase fluctuations play a central role in the formation of a pseudogap state in a disordered s-wave superconductor.

  8. Transmisión de síndrome de Down de madre a hijo

    Directory of Open Access Journals (Sweden)

    Harry Pachajoa

    2014-09-01

    Se reporta el caso de un recién nacido prematuro con síndrome de Down, hijo de madre con el mismo diagnóstico, producto de un embarazo resultado de violación, evento que debe ser prevenido de forma oportuna en esta población de alto riesgo.

  9. Climate change and N2O emissions from South West England grasslands: A modelling approach

    Science.gov (United States)

    Abalos, Diego; Cardenas, Laura M.; Wu, Lianhai

    2016-05-01

    Unravelling the impacts of climate change on agriculture becomes increasingly important, as the rates and magnitude of its effects are accelerating. Current estimates of the consequences of climate change on nitrous oxide (N2O) emissions remain largely uncertain; there is a need for more consistent and comprehensive assessments of this impact. In this study we explored the implications of two IPCC climate change projections (high and medium emissions scenarios) on N2O emissions from South West England grasslands for the time slices of a baseline, the 2020s, the 2050s and the 2080s, employing a process-based model (SPACSYS). The model was initially calibrated and validated using datasets collected from three grassland sites of the region. Statistical analysis showed that simulated results had no significant total error or bias compared to measured values. We found a consistent increase in N2O emissions of up to 94% under future climate change scenarios compared to those under the baseline, and warming rather than precipitation variability was the overriding factor controlling the N2O rise. Modelling fertilizer forms showed that replacing ammonium-nitrate fertilizers with urea or slurry significantly reduced N2O emissions (c. 30%). Our study highlights the urgent necessity to adopt viable N2O mitigation measures now in order to avoid higher emissions in the future.

  10. 5S-järjestelmän integrointi tekniikan työluokkaan

    OpenAIRE

    Nurro, Jari

    2013-01-01

    Opinnäytetyön tavoitteena on 5S-menetelmän pilotointi ja implementointi Oulun seudun ammattiopiston Myllytullin yksikköön, kohteena poweritiimi ja A-siiven kolmannen kerroksen työtilat. Työn tavoitteena on ns. teollisuusstandardi 5S:n mukauttaminen oppilaitosympäristöön silmällä pitäen sitä aspektia, että järjestelmä voidaan ottaa myös opetukseen mukaan yleisellä tasolla, että oppilaat saisivat yleiskäsityksen 5S-järjestelmästä ja ylipäänsä yhdestä laatujärjestelmästä käytössä aidossa ympäris...

  11. La tradición detrás de la calidad

    OpenAIRE

    2013-01-01

    La geografía de Japón habla por sí misma: rodeado por aguas, conserva recursos minerales insignificantes, un contexto que hizo de este país uno de los mayores importadores de energía de recursos naturales. En 1945, la rendición de Japón en la Segunda Guerra Mundial supuso que toda su actividad social, comercial e industrial quedara completamente devastada. Japón exportó entonces toda su producción disponible, como por ejemplo la lata, para importar recursos energéticos. Esta escasez de recurs...

  12. Plan de reestructuración administrativo y organizacional de la empresa Nikneacorp S. A.

    OpenAIRE

    Orellana Ramón, Jhoselin Zulema

    2015-01-01

    Nikneacorp S.A. está dedicada a la comercialización de materias primas, tiene como producto principal, el soluble de pescado. La presente investigación pretende crear un plan de reestructuración administrativo y organizacional que dé a conocer a sus empleados la misión, visión, políticas, planteando manuales de procesos y procedimientos para cada área de esta empresa. Nikneacorp S.A. is a company dedicated to the commercialization of raw materials, its main product is fish soluble. This re...

  13. Infoxicación a través de los sistemas de comunicación

    OpenAIRE

    Casas-Mas, Belén

    2014-01-01

    El objetivo de este artículo es analizar la infoxicación a través del sistema de comunicación pública. De forma específica, se aborda el tema de su influencia en el consenso y en el conflicto social. Los datos que sirven de base para este texto se sustentan en investigación titulada: “La Producción Social de la Comunicación y la Reproducción Social en la Era de la Globalización”. Por lo tanto, se parte de un diseño previo que es macro-sociológico, socio-histórico y dirigido a l...

  14. Nonclassical and Postnonclassical epistemology in Lev Vygotsky’s cultural-historical approach to clinical psychology

    Directory of Open Access Journals (Sweden)

    Zinchenko Y.P.

    2013-01-01

    Full Text Available The work presents historiographic and theoretical methodological study of establishment of fundamental theses of L.S. Vygotsky’s cultural-historical concept within the field of clinical psychology.We prove potency in application of contemporary philosophical concepts, which help distinguish between the types of scientific rationality (classical, nonclassical, and postnonclassical, for scientific reflection over the development of psychology and designation of paradigmatic status of cultural-historic concept suggested by L.S. Vygotsky and Vygotsky-Luria syndrome approach at the contemporary stage of science.Present study of scientific works of L.S. Vygotsky and his followers demonstrated that fundamentals of cultural-historic conception suggested by L.S. Vygotsky and further developed in methodology of Vygotsky-Luria syndrome approach, these fundamentals presented the origins of not only non-classical, but as well post-nonclassical model of scientific rationality. They are characterized by post-nonclassical understanding of the object and method of psychological study and post-nonclassical mode of thinking of the scientists.As it was showed, in works of L.S. Vygotsky there formulated general methodological requirements to organization of mental studies, which, on the whole, go in tune with the requirements introduced for study of complex self-developing systems. There were produced arguments to prove that the concept of Vygotsky-Luria syndrome approach describes mental syndromes as dynamic structures, which display the features of self-organization, self-determination and adaptive rationality. Hence, they can be regarded as open self-developing systems.We assume and verify the hypothesis that the syndrome analysis, due to the features of post-nonclassic modeling of scientific rationality it reveals, may be regarded as theoretically productive methodological approach at the modern stage of science.

  15. Correlation functions in the Coulomb branch of N=4 SYM from AdS/CFT correspondence

    CERN Document Server

    Rashkov, R C

    2000-01-01

    In the present paper we study $S(N)\\to S(U(N/2)\\times U(N/2))$ symmetry breaking in ${\\mathcal N}=4$ SYM via AdS/CFT correspondence. We consider two stacks of N/2 parallel D3 branes separated by a distance $2\\vec d$. In this case there is mixing between the different l-wave dilatonic KK modes. We calculate certain two point correlation functions in the dual gauge theory. Due to mode mixing, the diagonal correlation functions have 1/N conformal-like correction as well as deformation terms. The off-diagonal correlators are also nonvanishing and their leading order is 1/N. We discuss briefly the spectrum of the glueball exitations.

  16. Analyzing Heidegger’s Existentialism from the Perspective of Aristotle’s Practical Philosophy A New Approach towards Aristotle’s Nicomachean Ethics

    Directory of Open Access Journals (Sweden)

    AA Heydari

    2009-06-01

    Full Text Available The present paper is an attempt to illustrate the point that the basic issues in Aristotle’s practical philosophy in analyzing Heidegger’s existentialism are conceived of as the matter of ontology. Comportment of men in reference to beings (Verhaltenweisen mentioned in Book Six of Aristotle’s Nicomachean Ethics turns into comportment of constitution (Seinweise in the new approach to Heidegger’s Being and Time (Sein und Zeit. What is of great significance for Heidegger is reviving the hidden ontological power present in the three fundamental modes of activity in Aristotle’s theory in which praxis is preferred to two other modes of activity drawn from being, i.e. theorie and poíésis. Heidegger diagnosed some proper definitions and descriptions regarding human life in Aristotle’s transcendental idealism which are not known in modern philosophy as in Husserl’s philosophy. If we reconsider existentialism under the shadow of Aristotle’s phenomenology and specially Nicomachean Ethics, we may find ways to better interpret Heidegger’s philosophy.

  17. 27 CFR 21.92 - Denaturants listed as U.S.P. or N.F.

    Science.gov (United States)

    2010-04-01

    ....P. or N.F. 21.92 Section 21.92 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND... for Denaturants § 21.92 Denaturants listed as U.S.P. or N.F. Denaturing materials and products listed in this part as “U.S.P.” or “N.F.” shall meet the specifications set forth in the current...

  18. Aplicación de las transformada Wavelet en la interpretación de cortes sísmicos de reflexión

    Directory of Open Access Journals (Sweden)

    Margarita Fernández-Limia

    2001-03-01

    Full Text Available El reconocimiento estadístico de patrones sísmicos de reflexión desempeña un papel muy importante en la interpretación de estos datos. El mismo se basa en la comparación de estos patrones con otros de referencia, correspondientes a zonas bien estudiadas desde el punto de vista geológico y que se caracterizan por una clase de textura dada. En este trabajo se muestran los resultados de la segmentación supervisada de un corte sísmico de reflexión correspondiente a una región de Cuba. Dicha segmentación se llevó a cabo empleando el método de la transformada wavelet packet, utilizando la base ortogonal Daubechies-2 y la distancia de Mahalanobis como función de discriminación. Los descriptores de textura se obtuvieron a base de los coeficientes de esta transformación. Los patrones de referencia fueron tomados en correspondencia con zonas de diversas texturas, ubicadas a diferentes profundidades a lo largo de un pozo perforado en la región. El resultado de la segmentación constituye una valiosa ayuda para realizar la calibración geológica de las reflexiones sísmicas en el área investigada. Una vez identificadas las zonas texturales correspondientes a cuatro patrones de referencia, se realizó una segunda segmentación, tomando en este caso un solo patrón, correspondiente a una de las zonas del pozo con características de interés para la exploración petrolera. El trabajo demuestra que la técnica empleada en la interpretación de cortes sísmicos, la cual proporciona incluso una valoración cuantitativa de los mismos, puede constituir una herramienta adicional para los especialistas, que les permita complementar y comprobar sus métodos de prospección y análisis.

  19. Modeling and Simulation Resource Repository (MSRR)(System Engineering/Integrated M&S Management Approach

    Science.gov (United States)

    Milroy, Audrey; Hale, Joe

    2006-01-01

    NASA s Exploration Systems Mission Directorate (ESMD) is implementing a management approach for modeling and simulation (M&S) that will provide decision-makers information on the model s fidelity, credibility, and quality, including the verification, validation and accreditation information. The NASA MSRR will be implemented leveraging M&S industry best practices. This presentation will discuss the requirements that will enable NASA to capture and make available the "meta data" or "simulation biography" data associated with a model. The presentation will also describe the requirements that drive how NASA will collect and document relevant information for models or suites of models in order to facilitate use and reuse of relevant models and provide visibility across NASA organizations and the larger M&S community.

  20. Synthesis and high in vitro cytotoxicity of some (S,S-ethylenediamine-N,N’-di-2-propanoate dihydrochloride esters

    Directory of Open Access Journals (Sweden)

    Pantelić Nebojša

    2014-01-01

    Full Text Available Novel (S,S-R2eddip ester, O,O’-diisoamyl-(S,S-ethylenediamine-N,N’-di-2-propanoate dihydrochloride, 1, was synthesized and characterized by IR, 1H and 13C NMR spectroscopy, mass spectroscopy and elemental analysis.In vitro antitumor action of 1, and two more R2eddip esters, O,O’-dialkyl-(S,S-ethylenediamine-N,N’-di-2-propanoate dihydrochlorides, obtained before, (alkyl = n-Bu, n-Pe; 2 and 3, respectively, was determined against cervix adenocarcinoma (HeLa, human melanoma (Fem-x, human chronic myelogenous leukemia (K562 cells, and a non-cancerous cell line human embryonic lung fibroblast (MRC-5, using MTT assay. Esters 1-3 showed higher cytotoxicity and better selectivity in comparison to cisplatin, used as reference compound. The highest activityis expressed by1,with IC50(Fem-xvalue1.51 ± 0.09 µM. [Projekat Ministarstva nauke republike Srbije, br. 172035 i br. 175011

  1. On multiple M2-brane model(s and its N=8 Superspace Formulation(s

    Directory of Open Access Journals (Sweden)

    I. A. Bandos

    2010-01-01

    Full Text Available We give a brief review of Bagger-Lambert-Gustavsson (BLG model, with emphasis on its version invariant under the volume preserving diffeomorphisms (SDiff3 symmetry. We describe the on-shell superfield formulation of this SDiff3 BLG model in standard N = 8, d = 3 superspace, as well as its superfield action in the pure spinor N = 8 superspace. We also briefly address the Aharony-Bergman-Jafferis-Maldacena (ABJM/ABJ model invariant under SU(Mk × SU(N−k gauge symmetry, and discuss the possible form of their N = 6 and, for the case of Chern-Simons level k = 1, 2, N = 8 superfield equations.

  2. EVALUACIÓN DEL DESEMPEÑO DOCENTE, ESTRÉS Y BURNOUT EN PROFESORES UNIVERSITARIOS

    Directory of Open Access Journals (Sweden)

    Magaly Cárdenas Rodríguez

    2014-01-01

    Full Text Available El presente artículo es un estudio correlacional con diseño ex post facto , cuyo propósito es examinar la relación entre los puntajes obtenidos por docentes universitarios en la evaluación de su desempeño co n el grado de estrés percibido y con la presencia de indicadores del síndrome de B urnout . Para ello se plantearon los siguientes objetivos: 1 analizar la relación que existe entre los niveles de estrés percibido y el desempeño docente; 2 analizar la rela ción que existe entre el B urnout y el desempeño docente; y 3 analizar la relación que existe entre los niveles de estrés percibido y B urnout . En la recolección de datos se aplicaron la Escala de Estrés Percibido de Cohen y el Cuestionario de Burnout del Profesorado a una muestra convencional de 59 catedráticos de una facultad de la Universidad Autónoma de Nuevo León (México . S e examinaron los resultados de la evaluación del desempeño docente administrada a los alumnos en dos períodos inmediatos anterior es. La mayoría de las correlaciones entre el desempeño docente con estrés y B urnout resultaron débiles y no significativas; solamente resultó significativa la correlación entre falta de realización y cambio en el desempeño docente, que fue una correlación negativa (r= - .446; p=.003. La correlación entre los dos aspectos de desorganización institucional, supervisión y condiciones organizacionales, con cambio en desempeño docente, indicaron que, a medida que se percibe más desorganización institucional, el de sempeño docente empeora (r= - .361, p=.019 y r=.308, p=.047; respectivamente. En síntesis, los resultados indican que la falta de realización y la desorganización pueden estar relacionadas con el decremento del desempeño docente.

  3. Report on the Fermilab pilot N&S closure process

    Energy Technology Data Exchange (ETDEWEB)

    Coulson, L.

    1995-08-01

    This document outlines the plans and protocols for conducting a pilot of the Department of Energy`s Necessary & Sufficient Closure Process (Attachment A) at Fermilab National Accelerator Laboratory (FNAL) in Batavia, Illinois. The result of this pilot will be a set of standards which will serve as the agreed upon basis for providing FNAL with adequate Environment, Safety and Health Protection at the lowest possible cost. This pilot will seek out and emulate compatible industry practices which have been proven successful both in terms of safety performance and cost-effectiveness. This charter has been developed as a partnership effort by the parties to this agreement (see ``Responsibilities`` below), and is considered to be a living document.

  4. A LocationGuard Approach: An Efficacious Scheme to Alleviate DoS Attacks

    DEFF Research Database (Denmark)

    Banoth, Rajkumar

    2011-01-01

    from a denial-of- service (DoS) attack or a host compromise attack. Hence, most of these distributed file systems are vulnerable to targeted file attacks, wherein a n adversary attempts to attack a small (chosen) set of files by attacking the nodes that host them. This paper presents Location Guard—a...

  5. Nuclear Iran: Framing the U.S. Response Using a Scenario-Based Approach

    Science.gov (United States)

    2006-04-01

    Scearce, Diana; Katherine Fulton; and the Global Business Network community. WHAT IF? The Art of Scenario Thinking for Nonprofits. Emeryville, CA... Global Business Network, 2004. “Shah’s son wants role in Iran future.” Aljjazeera.net, 15 January 2004, n.p. On-line. Internet, 18 January 2006

  6. Nilpotent Symmetries of a Specific N = 2 Supersymmetric Quantum Mechanical Model: A Novel Approach

    CERN Document Server

    Krishna, S; Malik, R P

    2013-01-01

    We derive the on-shell nilpotent supersymmetric (SUSY) transformations for the N = 2 SUSY quantum mechanical model of a one (0 + 1)-dimensional free particle by exploiting the SUSY invariant restrictions on the (anti-)chiral supervariables of the SUSY theory that is defined on a (1, 2)-dimensional supermanifold (parametrized by a bosonic variable t and a pair of Grassmannian variables \\theta and \\bar \\theta with \\theta^2 = \\bar \\theta^2 = 0,\\theta \\bar \\theta + \\bar \\theta \\theta = 0). Within the framework of our novel approach, we express the Lagrangian and conserved SUSY charges in terms of the (anti-)chiral supervariables to demonstrate the SUSY invariance of the Lagrangian and nilpotency of the conserved charges in a simple manner. Our approach has the potential to be generalized to the description of other N = 2 SUSY quantum mechanical systems with physically interesting potential functions.

  7. Synthesis of Pyridinic-Rich N, S Co-doped Carbon Quantum Dots as Effective Enzyme Mimics

    Science.gov (United States)

    Liu, Teng; Cui, Zhi-wei; Zhou, Jun; Wang, Ying; Zou, Zhi-gang

    2017-05-01

    N and S co-doped carbon quantum dots (N, S-CQDs) with high N- and S-doping level were synthesized by microwave solid-phase pyrolysis within 50 s. Owing to the dominant pyridinic N injection into the conjugated framework, both high enzyme mimics catalytic activity and photoluminescence quantum yield are achieved simultaneously.

  8. Manipulación de la crisis a través de la acumulación por desposesión en México

    OpenAIRE

    Merchand Rojas, Marco Antonio

    2015-01-01

    La acumulación por desposesión es un ejercicio de poder que se ha expresado en el devenir histórico del capitalismo, aunque la acumulación por desposesión, cobra fuerza ideológica a partir del modelo neoliberal y representa, sino la única forma, si la más importante actualmente para sostener o incrementar la acumulación de capital en la geografía glocal (lograr el establishment del sistema bancario y de las grandes corporaciones y centros de poder -BM-FMI y BCE). El rasgo económico-...

  9. Relación entre el estrés de fricción endotelial y la vasodilatación mediada por flujo en primigestantes saludables

    Directory of Open Access Journals (Sweden)

    Robinson Ramírez-Vélez, Ft. PhD.

    2011-11-01

    El objetivo de este estudio es presentar la primera exploración de la normalización de los datos de la VMF durante la gestación y examinar la relación del estrés de fricción endotelial (EFE y la normalización de la vasodilatación mediada por flujo (nVMF en esta población. Se encontró una relación entre la VMF y la nVMF (R2=0,782, p0,05, ni entre el EFE y la nVMF (R2=0,013, p>0,05. Futuras investigaciones, cuidadosamente diseñadas, podrían estudiar esta propuesta en diferentes poblaciones. Los autores sugieren que la VMF y la nVMF, alguna vez podrán ser consideradas como herramientas con aplicabilidad clínica para estimar el riesgo cardiovascular.

  10. In Vitro Anticancer Evaluation of Platinum(II/IV) Complexes with Diisoamyl Ester of (S,S)-ethylenediamine-N,N'-di-2-propanoic Acid.

    Science.gov (United States)

    Zmejkovski, Bojana B; Pantelić, Nebojša; Filipović, Lana; Aranđelović, Sandra; Radulović, Siniša; Sabo, Tibor J; Kaluđerović, Goran N

    2017-01-01

    Platinum(II) and platinum(IV) complexes [PtCln{(S,S)-(i-Am)2eddip}] (n = 2, 4: 1, 2, respectively; (S,S)-(i-Am)2eddip = O,O'-diisoamyl-(S,S)-ethylenediamine-N,N'-di-2-propanoate) were synthesized and characterized by elemental analysis, IR, 1H and 13C NMR spectroscopy and mass spectrometry. Quantum chemical calculations were used to predict formed isomers of 1 and 2. Furthermore, reduction of 2 with ascorbic acid was followed by time-dependant 13C NMR spectroscopy in order to enable assignation of the formed isomers for complex 1. In vitro cytotoxic activity was determined for 1 and 2 on a panel of five human tumor cell lines derived from cervix adenocarcinoma (HeLa), alveolar basal adenocarcinoma (A549), breast adenocarcinoma (MDA-453), colorectal cancer (LS 174), erythromyeloblastoid leukemia (K562), as well as one non-malignant human lung fibroblast cell line (MRC-5), using MTT assay. Both complexes exhibited high (2 against K562: IC50 = 5.4 μM), more active than cisplatin, to moderate activity (1). Both complexes caused considerable decrease of cell number in K562 cells in G1, S and G2 phases, concordantly increasing subpopulation in sub-G1 fraction. Morphological analysis of K562 cell death induced by platinum(II/IV) complexes indicate apoptosis. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.

  11. Creación e implantación de una aplicación para 5S en empresa logística

    OpenAIRE

    Francés Álvarez, Alberto

    2015-01-01

    Esta memoria tiene como objetivo la creación de una aplicación informática para la inicialización, ejecución y mantenimiento de un proyecto de instauración de una dinámica de trabajo y gestión de recursos basada en la aplicación de las técnicas de 5S. Esto proyecto ha sido realizado de forma interna por el departamento de Procesos, del cual formo parte, para una empresa del sector de la logística, y centrada en el mercado del libro. Centra toda su actividad en el almacén que tiene situado ...

  12. ϒ(nS polarizations versus particle multiplicity in pp collisions at s=7 TeV

    Directory of Open Access Journals (Sweden)

    V. Khachatryan

    2016-10-01

    Full Text Available The polarizations of the ϒ(1S, ϒ(2S, and ϒ(3S mesons are measured as a function of the charged particle multiplicity in proton–proton collisions at s=7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb−1. The results are extracted from the dimuon decay angular distributions, in two ranges of ϒ(nS transverse momentum (10–15 and 15–35 GeV, and in the rapidity interval |y|<1.2. The results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the ϒ(2S and ϒ(3S cases.

  13. $\\Upsilon(\\mathrm{nS})$ polarizations versus particle multiplicity in pp collisions at $\\sqrt{s} =$ 7 TeV

    CERN Document Server

    Khachatryan, Vardan; Tumasyan, Armen; Adam, Wolfgang; Aşılar, Ece; Bergauer, Thomas; Brandstetter, Johannes; Brondolin, Erica; Dragicevic, Marko; Erö, Janos; Fabjan, Christian; Flechl, Martin; Friedl, Markus; Fruehwirth, Rudolf; Ghete, Vasile Mihai; Hartl, Christian; Hörmann, Natascha; Hrubec, Josef; Jeitler, Manfred; Knünz, Valentin; König, Axel; Krammer, Manfred; Krätschmer, Ilse; Liko, Dietrich; Matsushita, Takashi; Mikulec, Ivan; Rabady, Dinyar; Rad, Navid; Rahbaran, Babak; Rohringer, Herbert; Schieck, Jochen; Schöfbeck, Robert; Strauss, Josef; Treberer-Treberspurg, Wolfgang; Waltenberger, Wolfgang; Wulz, Claudia-Elisabeth; Mossolov, Vladimir; Shumeiko, Nikolai; Suarez Gonzalez, Juan; Alderweireldt, Sara; Cornelis, Tom; De Wolf, Eddi A; Janssen, Xavier; Knutsson, Albert; Lauwers, Jasper; Luyckx, Sten; Van De Klundert, Merijn; Van Haevermaet, Hans; Van Mechelen, Pierre; Van Remortel, Nick; Van Spilbeeck, Alex; Abu Zeid, Shimaa; Blekman, Freya; D'Hondt, Jorgen; Daci, Nadir; De Bruyn, Isabelle; Deroover, Kevin; Heracleous, Natalie; Keaveney, James; Lowette, Steven; Moreels, Lieselotte; Olbrechts, Annik; Python, Quentin; Strom, Derek; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Onsem, Gerrit Patrick; Van Parijs, Isis; Barria, Patrizia; Brun, Hugues; Caillol, Cécile; Clerbaux, Barbara; De Lentdecker, Gilles; Fang, Wenxing; Fasanella, Giuseppe; Favart, Laurent; Goldouzian, Reza; Grebenyuk, Anastasia; Karapostoli, Georgia; Lenzi, Thomas; Léonard, Alexandre; Maerschalk, Thierry; Marinov, Andrey; Perniè, Luca; Randle-conde, Aidan; Seva, Tomislav; Vander Velde, Catherine; Vanlaer, Pascal; Yonamine, Ryo; Zenoni, Florian; Zhang, Fengwangdong; Beernaert, Kelly; Benucci, Leonardo; Cimmino, Anna; Crucy, Shannon; Dobur, Didar; Fagot, Alexis; Garcia, Guillaume; Gul, Muhammad; Mccartin, Joseph; Ocampo Rios, Alberto Andres; Poyraz, Deniz; Ryckbosch, Dirk; Salva Diblen, Sinem; Sigamani, Michael; Tytgat, Michael; Van Driessche, Ward; Yazgan, Efe; Zaganidis, Nicolas; Basegmez, Suzan; Beluffi, Camille; Bondu, Olivier; Brochet, Sébastien; Bruno, Giacomo; Caudron, Adrien; Ceard, Ludivine; Delaere, Christophe; Favart, Denis; Forthomme, Laurent; Giammanco, Andrea; Jafari, Abideh; Jez, Pavel; Komm, Matthias; Lemaitre, Vincent; Mertens, Alexandre; Musich, Marco; Nuttens, Claude; Perrini, Lucia; Piotrzkowski, Krzysztof; Popov, Andrey; Quertenmont, Loic; Selvaggi, Michele; Vidal Marono, Miguel; Beliy, Nikita; Hammad, Gregory Habib; Aldá Júnior, Walter Luiz; Alves, Fábio Lúcio; Alves, Gilvan; Brito, Lucas; Correa Martins Junior, Marcos; Hamer, Matthias; Hensel, Carsten; Moraes, Arthur; Pol, Maria Elena; Rebello Teles, Patricia; Belchior Batista Das Chagas, Ewerton; Carvalho, Wagner; Chinellato, Jose; Custódio, Analu; Melo Da Costa, Eliza; De Jesus Damiao, Dilson; De Oliveira Martins, Carley; Fonseca De Souza, Sandro; Huertas Guativa, Lina Milena; Malbouisson, Helena; Matos Figueiredo, Diego; Mora Herrera, Clemencia; Mundim, Luiz; Nogima, Helio; Prado Da Silva, Wanda Lucia; Santoro, Alberto; Sznajder, Andre; Tonelli Manganote, Edmilson José; Vilela Pereira, Antonio; Ahuja, Sudha; Bernardes, Cesar Augusto; De Souza Santos, Angelo; Dogra, Sunil; Tomei, Thiago; De Moraes Gregores, Eduardo; Mercadante, Pedro G; Moon, Chang-Seong; Novaes, Sergio F; Padula, Sandra; Romero Abad, David; Ruiz Vargas, José Cupertino; Aleksandrov, Aleksandar; Hadjiiska, Roumyana; Iaydjiev, Plamen; Rodozov, Mircho; Stoykova, Stefka; Sultanov, Georgi; Vutova, Mariana; Dimitrov, Anton; Glushkov, Ivan; Litov, Leander; Pavlov, Borislav; Petkov, Peicho; Ahmad, Muhammad; Bian, Jian-Guo; Chen, Guo-Ming; Chen, He-Sheng; Chen, Mingshui; Cheng, Tongguang; Du, Ran; Jiang, Chun-Hua; Leggat, Duncan; Plestina, Roko; Romeo, Francesco; Shaheen, Sarmad Masood; Spiezia, Aniello; Tao, Junquan; Wang, Chunjie; Wang, Zheng; Zhang, Huaqiao; Asawatangtrakuldee, Chayanit; Ban, Yong; Li, Qiang; Liu, Shuai; Mao, Yajun; Qian, Si-Jin; Wang, Dayong; Xu, Zijun; Avila, Carlos; Cabrera, Andrés; Chaparro Sierra, Luisa Fernanda; Florez, Carlos; Gomez, Juan Pablo; Gomez Moreno, Bernardo; Sanabria, Juan Carlos; Godinovic, Nikola; Lelas, Damir; Puljak, Ivica; Ribeiro Cipriano, Pedro M; Antunovic, Zeljko; Kovac, Marko; Brigljevic, Vuko; Kadija, Kreso; Luetic, Jelena; Micanovic, Sasa; Sudic, Lucija; Attikis, Alexandros; Mavromanolakis, Georgios; Mousa, Jehad; Nicolaou, Charalambos; Ptochos, Fotios; Razis, Panos A; Rykaczewski, Hans; Bodlak, Martin; Finger, Miroslav; Finger Jr, Michael; Abdelalim, Ahmed Ali; Awad, Adel; Mahrous, Ayman; Radi, Amr

    2016-10-10

    The polarizations of the $\\Upsilon(1\\mathrm{S})$, $\\Upsilon(2\\mathrm{S})$, and $\\Upsilon(3\\mathrm{S})$ mesons are measured as a function of the charged particle multiplicity in proton-proton collisions at $\\sqrt{s} =$ 7 TeV. The measurements are performed with a dimuon data sample collected in 2011 by the CMS experiment, corresponding to an integrated luminosity of 4.9 fb$^{-1}$. The results are extracted from the dimuon decay angular distributions,in two ranges of $\\Upsilon(\\mathrm{nS})$ transverse momentum (10$-$15 and 15$-$35 GeV), and in the rapidity interval $ |y| $ < 1.2. The results do not show significant changes from low- to high-multiplicity pp collisions, although large uncertainties preclude definite statements in the $\\Upsilon(2\\mathrm{S})$ and $\\Upsilon(3\\mathrm{S})$ cases.

  14. N3LO NN interaction adjusted to light nuclei in ab exitu approach

    Science.gov (United States)

    Shirokov, A. M.; Shin, I. J.; Kim, Y.; Sosonkina, M.; Maris, P.; Vary, J. P.

    2016-10-01

    We use phase-equivalent transformations to adjust off-shell properties of similarity renormalization group evolved chiral effective field theory NN interaction (Idaho N3LO) to fit selected binding energies and spectra of light nuclei in an ab exitu approach. We then test the transformed interaction on a set of additional observables in light nuclei to verify that it provides reasonable descriptions of these observables with an apparent reduced need for three- and many-nucleon interactions.

  15. FRIGA, A New Approach To Identify Isotopes and Hypernuclei In N-Body Transport Models

    CERN Document Server

    Fèvre, A Le; Aichelin, J; Hartnack, Ch; Kireyev, V; Bratkovskaya, E

    2015-01-01

    We present a new algorithm to identify fragments in computer simulations of relativistic heavy ion collisions. It is based on the simulated annealing technique and can be applied to n-body transport models like the Quantum Molecular Dynamics. This new approach is able to predict isotope yields as well as hyper-nucleus production. In order to illustrate its predicting power, we confront this new method to experimental data, and show the sensitivity on the parameters which govern the cluster formation.

  16. A comprehensive approach to women’s health: lessons from the Mexican health reform

    Directory of Open Access Journals (Sweden)

    Frenk Julio

    2012-12-01

    Full Text Available Abstract Background This paper discusses the way in which women’s health concerns were addressed in Mexico as part of a health system reform. Discussion The first part sets the context by examining the growing complexity that characterizes the global health field, where women’s needs occupy center stage. Part two briefly describes a critical conceptual evolution, i.e. from maternal to reproductive to women’s health. In the third and last section, the novel “women and health” (W&H approach and its translation into policies and programs in the context of a structural health reform in Mexico is discussed. W&H simultaneously focuses on women’s health needs and women’s critical roles as both formal and informal providers of health care, and the links between these two dimensions. Summary The most important message of this paper is that broad changes in health systems offer the opportunity to address women’s health needs through innovative approaches focused on promoting gender equality and empowering women as drivers of change.

  17. On static black holes solutions in Einstein and Einstein–Gauss–Bonnet gravity with topology S{sup n}×S{sup n}

    Energy Technology Data Exchange (ETDEWEB)

    Dadhich, Naresh, E-mail: nkd@iucaa.ernet.in [Centre for Theoretical Physics, Jamia Millia Islamia, 110025, New Delhi (India); Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, 411 007, Pune (India); Pons, Josep M., E-mail: pons@ecm.ub.es [Departament d’Estructura i Constituents de la Matèria and Institut de Ciències del Cosmos (ICCUB), Facultat de Fsica, Universitat de Barcelona, Diagonal 647, 08028, Barcelona, Catalonia (Spain)

    2015-06-24

    We study static black hole solutions in Einstein and Einstein–Gauss–Bonnet gravity with the topology of the product of two spheres, S{sup n}×S{sup n}, in higher dimensions. There is an unusual new feature of the Gauss–Bonnet black hole: the avoidance of a non-central naked singularity prescribes a mass range for the black hole in terms of Λ>0. For an Einstein–Gauss–Bonnet black hole a limited window of negative values for Λ is also permitted. This topology encompasses black strings, branes, and generalized Nariai metrics. We also give new solutions with the product of two spheres of constant curvature.

  18. Olvidados y desatendidos: los refugiados después del terremoto de Japón

    OpenAIRE

    2011-01-01

    A pesar de ser líder mundial en planes de preparación frente a catástrofes, tras el terremoto de 2011 Japón prestó escasa atención a las necesidades de uno de sus grupos sociales más marginados. Los refugiados y los solicitantes de asilo sufrieron restricciones a la hora de desplazarse, aumento de su empobrecimiento y falta de información.

  19. La legislacións relevante en materia de adicciones

    OpenAIRE

    Cobas Cobiella, María Elena

    2005-01-01

    El presente trabajo tiene como objetivo, exponer sucintamente, y acotada cronológicamente, la legislacións destacada en materia de adicción, con especial referencia al alcoholismo, tabaquismo y drogas. Igualmente se expondrán aquellos elementos comunes y principios que identifica la legislación estatal, y las legislacio­nes autonómicas en la materia.

  20. Educación en valores a través del deporte /

    OpenAIRE

    Estévez Manzano, Víctor

    2015-01-01

    El autor expone en su trabajo la posibilidad de educar en valores a través de la asignatura de educación física a los alumnos de primaria. El deporte escolar por su propia definición debe tener fundamentalmente fines educativos, tanto referidos a la educación general, como a la propia educación física, y consecuentemente con los pretendidos valores del deporte.

  1. Educación en valores a través del deporte /

    OpenAIRE

    Estévez Manzano, Víctor

    2015-01-01

    El autor expone en su trabajo la posibilidad de educar en valores a través de la asignatura de educación física a los alumnos de primaria. El deporte escolar por su propia definición debe tener fundamentalmente fines educativos, tanto referidos a la educación general, como a la propia educación física, y consecuentemente con los pretendidos valores del deporte.

  2. 疲劳S-N曲线的加权最小二乘法拟合%WEIGHTED LEAST SQUARE METHOD FOR S-N CURVE FITTING

    Institute of Scientific and Technical Information of China (English)

    吉凤贤; 姚卫星

    2004-01-01

    提出了一种拟合材料疲劳S-N曲线的加权最小二乘法,各应力水平下的拟合点的权重反比于均值置信区间的长度.两个算例结果表明:本文方法较好地考虑了S-N曲线分散性的物理特性.%An S-N curve fitting approach is proposed based on the weighted least square method, and the weights are inversely proportional to the length of mean confidence intervals of experimental data sets. The assumption coincides with the physical characteristics of the fatigue life scatter. Two examples demonstrate the method. It is shown that the method has better accuracy and reasonableness compared with the usual least square method.

  3. Glauber - Gribov approach for DIS on nuclei in N=4 SYM

    CERN Document Server

    Levin, E; Kopeliovich, B Z; Scmidt, Ivan

    2009-01-01

    In this paper the Glauber-Gribov approach for deep-inelastic scattering (DIS) with nuclei is developed in N=4 SYM. It is shown that the amplitude displays the same general properties, such as geometrical scaling, as is the case in the high density QCD approach. We found that the quantum effects leading to the graviton reggeization, give rise to an imaginary part of the nucleon amplitude, which makes the DIS in N=4 SYM almost identical to the one expected in high density QCD. We concluded that the impact parameter dependence of the nucleon amplitude is very essential for N=4 SYM, and the entire kinematic region can be divided into three regions which are discussed in the paper. We revisited the dipole description for DIS and proposed a new renormalized Lagrangian for the shock wave formalism which reproduces the Glauber-Gribov approach in a certain kinematic region. However the saturation momentum turns out to be independent of energy, as it has been discussed by Albacete, Kovchegov and Taliotis. We discuss th...

  4. Conformal Bootstrap Approach to O(N) Fixed Points in Five Dimensions

    CERN Document Server

    Bae, Jin-Beom

    2014-01-01

    Whether O(N)-invariant conformal field theory exists in five dimensions with its implication to higher-spin holography was much debated. We find an affirmative result on this question by utilizing conformal bootstrap approach. In solving for the crossing symmetry condition, we propose a new approach based on specification for the low-lying spectrum distribution. We find the traditional one-gap bootstrapping is not suited since the nontrivial fixed point expected from large-N expansion sits at deep interior (not at boundary or kink) of allowed solution region. We propose two-gap bootstrapping that specifies scaling dimension of two lowest scalar operators. The approach carves out vast region of lower scaling dimensions and universally features two tips. We find that the sought-for nontrivial fixed point now sits at one of the tips, while the Gaussian fixed point sits at the other tip. The scaling dimensions of scalar operators fit well with expectation based on large-N expansion. We also find indication that t...

  5. Structural analysis of the starfish SALMFamide neuropeptides S1 and S2: the N-terminal region of S2 facilitates self-association.

    Science.gov (United States)

    Otara, Claire B; Jones, Christopher E; Younan, Nadine D; Viles, John H; Elphick, Maurice R

    2014-02-01

    The neuropeptides S1 (GFNSALMFamide) and S2 (SGPYSFNSGLTFamide), which share sequence similarity, were discovered in the starfish Asterias rubens and are prototypical members of the SALMFamide family of neuropeptides in echinoderms. SALMFamide neuropeptides act as muscle relaxants and both S1 and S2 cause relaxation of cardiac stomach and tube foot preparations in vitro but S2 is an order of magnitude more potent than S1. Here we investigated a structural basis for this difference in potency using spectroscopic techniques. Circular dichroism spectroscopy showed that S1 does not have a defined structure in aqueous solution and this was supported by 2D nuclear magnetic resonance experiments. In contrast, we found that S2 has a well-defined conformation in aqueous solution. However, the conformation of S2 was concentration dependent, with increasing concentration inducing a transition from an unstructured to a structured conformation. Interestingly, this property of S2 was not observed in an N-terminally truncated analogue of S2 (short S2 or SS2; SFNSGLTFamide). Collectively, the data obtained indicate that the N-terminal region of S2 facilitates peptide self-association at high concentrations, which may have relevance to the biosynthesis and/or bioactivity of S2 in vivo.

  6. Relación de apego en madres adolescentes y sus bebés canguro

    Directory of Open Access Journals (Sweden)

    Jenny Amanda Ortiz

    2006-01-01

    Full Text Available Este estudio investigó el efecto de la edad materna y la participación en el Programa Madre Canguro (PMC sobre el la relación de apego establecida en un grupo de madres y bebés de estrato socioeconómico bajo. Las díadas se agruparon dependiendo de, a la edad de lasmadres al momento del parto (madres adolescentes y madres adultas; y b la participación de los bebés en el PMC (bebés canguro y bebés no-canguro. La evaluación de las interacciones madre-bebé se llevó a cabo a través de observaciones naturalistas en las casas de las familias. Los resultados indicaron que el programa de atención alternativo para los bebés de bajo peso al nacer, el PMC, incrementa la sensibilidad materna y disminuye el efecto negativo de variables como la pobreza, la prematurez, la hospitalización y separación temprana, y la maternidad adolescente sobre la primera relación de apego. Se encontró además que el PMC no incrementa la posibilidad de establecer relaciones de apego inseguras entre los bebés y sus madres; al contrario, la participación en el PMC se constituyó como un factor de protección para éstas díadas. Los resultados proveen insumos útiles para el desarrollo de programas de prevenciónintervención dirigidos a poblaciones de alto riesgo, a la vez que contribuyen al fortalecimiento de conceptos, áreas de análisis y metodologías propias de la teoría del apego en el contexto colombiano

  7. Estrés alimentario y salud laboral vs. estrés laboral y alimentación equilibrada

    Directory of Open Access Journals (Sweden)

    Juan José Díaz Franco

    2007-12-01

    Full Text Available Si bien el estrés laboral es una realidad experimentada cada jornada por muchos trabajadores, debemos reconocer que algunas profesiones y actividades laborales generan más estrés (distrés que otras: así, los trabajos de dirección, nocturnos, monótonos, de servicios comunitarios, de industria pesada y minería, de construcción, etc. La mayor acumulación de estrés laboral puede alterar los patrones de conducta de quienes lo sufren. De manera muy especial, los hábitos alimentarios y las conductas asociadas a ellos pueden verse seriamente afectados por el estrés laboral (ingestas inadecuadas o extemporáneas, o pueden, "sensu contrario", ser desencadenantes de formas de estrés originadas por alteraciones o desórdenes dietéticos. Por eso no extraña que el aparato digestivo se convierta en órgano diana de patologías asociadas al estrés propio de ambientes y ritmos laborales insanos y vitandos. El estrés laboral puede alterar el apetito y el hambre y, como consecuencia, la correcta conducta alimentaria y la nutrición que, inexorable e involuntariamente, sigue a ésta. En determinadas circunstancias, hay disociación entre el apetito (sensación primariamente psíquica y el hambre (sensación básicamente orgánica. Y es que el apetito, como estado mental, puede verse modificado por diferentes situaciones emocionales (muy frecuentemente, por el estrés laboral, o a través de variaciones químicas y vasculares y de impulsos transmitidos al mesencéfalo desde diversos órganos, donde el estrés podría desempeñar también un papel relevante. La nutrición depende esencialmente de la alimentación; pero, a su vez, una fuente importante de estrés la constituye la forma en que nos alimentamos, porque si lo hacemos erróneamente podemos contraer enfermedades. Si nuestras células no reciben los aportes nutritivos adecuados, se produce una gran carga de estrés debida a esta demanda interna insatisfecha.Although occupational stress is a

  8. Süt Somatik Hücre Sayısının E-Burun ile Belirlenmesi

    OpenAIRE

    İNALPULAT, Melis; KIZIL, Ünal; BİLGÜCÜ, Ertuğrul; GENÇ, Levent

    2016-01-01

    Mastitis sağmal hayvanlar arasında yaygın bir hastalık olup önemli ekonomik kayıplara sebep olur. Hastalık çeşitli klinik bulgularla teşhis edilebilirken süt somatic hücre sayısı (SHS) kilit göstergelerden biri olarak kabul edilmiştir. Bununla birlikte SHS’ nın geleneksel yöntemlerle belirlenmesi yoğun emek gerektirir ve zaman alıcıdır. Bu çalışma farklı metal oksit sensörler (MOS) içeren elektronik burun (e-burun) sisteminin bir eşik değerin üzerinde SHS içeren sütleri ayırt edebilme yetene...

  9. Celdas solares de heteroestructura: contacto metálico/p-CdTe/n-CdS/n-TCO/vidrio

    OpenAIRE

    Márquez Marín, Joaquín

    2015-01-01

    En este trabajo se realizó la optimización de películas policristalinas con las características necesarias para la fabricación de heteroestructuras del tipo metal/CdTe/CdS/TCO/Vidrio para aplicaciones fotovoltaicas. Los óxidos conductores transparentes (TCO´s) usados como contacto frontal fueron películas de CdIn2O4, Cd2SnO4 e ITO comercial. Las películas de CdS fueron depositadas por el método de baño químico a 90 °C y las películas de CdTe fueron depositadas por la técnica de sublimación...

  10. S-duality and the Calabi-Yau interpretation of the N = 4 to N = 2 flow

    CERN Document Server

    Gómez, C; López, E

    1995-01-01

    The action of the S-duality Sl(2,Z) group on the moduli of the Calabi-Yau manifold W\\IP^{12}_{11226} appearing in the rank two dual pair (K^{3}\\times T^{2}/W\\IP^{12}_{11226}) is defined by interpreting the N\\!=\\!4 to N\\!=\\!2 flow, for SU(2) supersymmetric Yang-Mills, in terms of the Calabi-Yau moduli. The different singularity loci are mapped in a one to one way, and the (N\\!=\\!2 limit/point particle limit) is obtained in both cases by the same type of blow up. Moreover, it is shown that the S-duality group permutes the different singularity loci of the moduli of W\\IP^{12}_{11226}. We study the transformation under S-duality of the Calabi-Yau Yukawa couplings.

  11. Plan de prevención de riesgos laborales para la empresa Plasdur S.L.

    OpenAIRE

    García Palencia, Isabel

    2012-01-01

    El Plan de prevención de riesgos laborales de la empresa PLASDUR S.L. se refleja en el presente documento que se conservará a disposición de la autoridad laboral, de las autoridades sanitarias y de los representantes de los trabajadores, e incluye, con la amplitud adecuada a la dimensión y características de la empresa, según el Reglamento de los servicios de prevención (R.D. 39/1997), los siguientes elementos: o La identificación de la empresa, de su actividad productiva, el número y caracte...

  12. Yritys X:n sähköisten asiointikanavien omaksuminen

    OpenAIRE

    Jääskeläinen, Sallamaari

    2014-01-01

    Tämän opinnäytetyön tarkoituksena oli tutkia, mitkä tekijät vaikuttavat Yritys X:n asiakkaiden sähköisten asiointikanavien omaksumiseen. Lisäksi tutkittiin, miten asiakkaiden demografiset tekijät, käytössä olevat pankkipalvelut, toimihenkilön onnistunut opastus sekä asiointikanavien markkinointi vaikuttavat asiointikanavaan suhtautumiseen sekä käytön omaksumiseen. Opinnäytetyön lähteinä on käytetty viitekehykseen sopivaa kirjallisuutta sekä luotettavia internetlähteitä. Teoreettiseen vii...

  13. Evaluación de sustratos y procesos de fermentación sólida para la producción de esporas de Trichoderma sp

    Directory of Open Access Journals (Sweden)

    Elkin Yabid Agamez Ramos

    2009-01-01

    Full Text Available Se evaluó un aislado nativo del hongo Trichoderma sp. en 13 sustratos y dos procesos de fermentación sólida.Se utilizaron sustratos sólidos a base de semillas de Artocarpus incisa (fruta de pan y desechos agroindustriales como cascarilla de arroz y algodón. La mejor producción de esporas se registró en el sustrato compuesto por cascarilla de algodón (enriquecida con soluciones de melaza y semillas de Artocarpus incisa con valores de concentración de esporas entre 2,1 x 108 conidios/g, y 8,38 x 108 conidios/g. Mientras que las más bajas concentraciones se presentaron en cascarilla de arroz. Los sustratos EA-5 (cascarilla de algodón enriquecida con solución de melaza 1% - Urea 1% (5:1 y E-FP-1 (cascarilla de algodón al 60% - semillas de Artocarpus incisa, al 40% se diferenciaron significativamente del resto de los sustratos probados por presentar las más altas concentraciones. Se seleccionaron estos dos sustratos para evaluar dos procesos de producción masiva de esporas de Trichoderma sp. utilizando los procesos de fermentación sólida: artesanal y semi-industrial, este último caracterizado por suministro de aire con presión de 2L/min. Mediante conteos de conidias/g. del polvo cosechado en cámara de Neubauer, se determinó la concentración de esporas en cada uno de los sustratos, obteniéndose concentraciones para los procesos artesanal y semi-industrial de 2,53 x 109 y 2.31 x 109 conidios/g, respectivamente. Para estos procesos estadísticamente no se encontraron diferencias significativas, indicando que la aireación aplicada para el proceso semi-industrial no tuvo incidencia relevante para mejorar la esporulación con respecto al proceso artesanal. Palabras clave: Trichoderma sp.; producción de esporas; fermentación sólida; Trichoderma sp.; spores production; solid fermentation.

  14. En atención sanitaria, más o menos, menos es más: apuntes sobre desinversión sanitaria

    Directory of Open Access Journals (Sweden)

    S. Peiró

    2014-02-01

    Full Text Available Objetivos: Más allá de la actual crisis económica, el Sistema Nacional de Salud (SNS tiene un problema de sostenibilidad a largo plazo derivado de los cambios en los patrones de morbilidad con la irrupción de la cronicidad y la aceleración del cambio tecnológico con la rápida incorporación de nuevas tecnologías de elevado precio. El objetivo de este artículo es explorar el papel de la desinversión de tecnologías de bajo valor como estrategia para la sostenibilidad del SNS. Material y método: Revisión narrativa y discusión de las características relevantes de las estrategias de desinversión en varios países. Resultados: La desinversión es un proceso explícito mediante el cual dejan de financiarse de forma parcial o completa medicamentos, dispositivos, aparatos o procedimientos con bajo o dudoso valor clínico. Sistemas sanitarios muy dispares -como los de Australia, Nueva Zelanda, Reino Unido o Estados Unidos- han puesto en marcha estrategias de desinversión diferenciadas adaptadas a su contexto, mientras que en España se mantienen las reticencias a incorporar mecanismos explícitos para la toma de decisiones sobre la incorporación o desinversión de tecnologías sanitarias al SNS. Discusión: Desinvertir en tecnologías de bajo valor es complejo. Muchas tecnologías son sólo candidatas a desinversión parcial o su valor es objeto de controversia y, adicionalmente, existen barreras psicológicas y sociológicas a la desinversión. La implantación de estas estrategias requiere el compromiso de profesionales y administraciones sanitarias y la complicidad de pacientes y ciudadanos, compromiso que debe ser gestionado.

  15. (μ-trans-1,2-Di-4-pyridylethylene-κ2N:N′bis[bis(N,N-diisopropyldithiocarbamato-κ2S,S′zinc(II

    Directory of Open Access Journals (Sweden)

    Hadi D. Arman

    2009-11-01

    Full Text Available The dinuclear title compound, [Zn2(C7H14NS24(C12H10N2], is centrosymmetric about the central C=C bond. The five-coordinate Zn atom is bonded to two asymmetrically chelating dithiocarbamate ligands and a pyridine N atom to define an NS4 coordination geometry tending towards a square pyramid, with the N atom in the apical site. In the crystal structure, C—H...S contacts lead to supramolecular chains.

  16. A Facile Method for the Synthesis of Oxoketene-N,S- and -N,N-acetals from Reactions of Amino Compounds

    Directory of Open Access Journals (Sweden)

    Annie Mathews

    2010-01-01

    Full Text Available 2-Aroyl-3,3-bis(alkylsulfanylacrylaldehydes reacted with various primary amines, namely, o-phenylenediamine, ethylenediamine, and anilines to produce functionalized oxoketene-N,S-acetals and N,N-acetals in good yields. Imidazolo derivatives synthesized with o-phenylenediamine and ethylenediamine containing a formyl group could act as valuable starting materials for a variety of substituted heterocyclic compounds.

  17. La Transversalidad del Inglés en la Formación Integral de Educación Superior

    Directory of Open Access Journals (Sweden)

    Leyda Alviárez

    2013-05-01

    Full Text Available La enseñanza del INGLS con Fines Específicos (IFE surge en la Universidad del Zulia (LUZ como respuesta a las necesidades de los estudiantes de manejar textos de su especialidad en inglés. Esta investigación analiza la posicionalidad de la transversalidad del IFE en la formación integral a desarrollar en LUZ. Se realizó un arqueo bibliográfico curricular desde el currículo integral hasta el de por competencias, sustentado por Polo (2006, Canquíz e Inciarte (2006, Bravo (2007, Tobón (2005, Delors (1999, Morín (2000, entre otros. La investigación es descriptiva, no experimental, de campo, desarrollada bajo el paradigma cualitativo. Se trabajó con 37 profesores de IFE de las distintas facultades de LUZ, representando el 100% de los profesores que dictaban IFE durante el 1er. Período 2010. La recolección de datos se realizó a través de una encuesta estructurada para los docentes y una matriz de análisis para los programas de estudio. Se calculó el coeficiente de confiabilidad con el método Alfa de Cronbach, resultando moderadamente confiable con valor de 0,85. El análisis de los datos se realizó con la estadística descriptiva utilizando medidas de tendencia central, posición, dispersión y análisis de varianza. Los resultados evidencian que es favorable el posicionamiento de la transversalidad de IFE en el currículo integral de LUZ. Sin embargo, según el análisis de contenido, los procesos de pensamiento que están limitando tal inserción son el pensamiento creativo, el pensamiento crítico y la solución de problemas; así como también están ausentes los valores de responsabilidad, ética y el amor por el saber los cuales deben estar explícitos en los programas de inglés. Se propone rediseñar los pensa de estudio de todas las carreras de LUZ para el posicionamiento de la transversalidad de IFE en función de mejorar la performance académica-social de sus estudiantes.

  18. APATÍA, DESMOTIVACIÓN, DESINTERÉS, DESGANO Y FALTA DE PARTICIPACIÓN EN ADOLESCENTES MEXICANOS

    Directory of Open Access Journals (Sweden)

    Yessica Paola Aguilar Montes de Oca

    2015-01-01

    Full Text Available El objetivo de investigación fue explorar las causas que originan apatía, desmotivación, desinte-rés, desgano y falta de participación en adolescentes mexicanos. Participaron 200 adolescentesde 13 a 15 años, hombres y mujeres. Se administró el Cuestionario de Causas de la Apatía. Seobservó que los adolescentes prefieren no participar en la dinámica familiar, los quehaceresdomésticos, la escuela, las actividades físicas y religiosas, quizá porque consideran que no re-dituarán algo a su vida, tanto en lo biológico (sobrevivir, como psicosociocultural (ser más ymejores que otros y que sí mismos. Estos indicadores entrañan riesgo; además, se reprime enellos la posibilidad de desarrollar sus potencialidades, lo cual podría llevarlos a no vivir con baseen suser en el hacer,donde se es lo que se hace y se hace lo que se es, sin contradicción, con gustoy sin quejas.

  19. La opinión pública catalana antes y después del 27S

    Directory of Open Access Journals (Sweden)

    Víctor Omar Dabbagh Rollán

    2016-10-01

    Full Text Available La posible independencia de Cataluña ha sido y es un tema con un enorme atractivo para los científicos sociales y los medios de comunicación, pero en los últimos años ha recibido una especial atención por el impulso que los partidos independentistas catalanes han dado al proceso secesionista. A la hora de abordar este proceso hay que tener en cuenta la complejidad del mismo, ya que son diversos los aspectos que intervienen en el mismo: históricos, sociales, económicos, políticos, etc. Y se complica aún más cuando se incluye en el análisis los diversos actores y puntos de vista existentes. Desde este artículo, a partir de los datos del Centre d´Estudis d´Opinió, se pretende analizar la opinión pública catalana a este respecto, antes y después de las elecciones al parlamento catalán de septiembre de 2015, por considerarla como uno de los principales focos de atención de los actores políticos y sociales en tanto que la misma se utiliza como fuente de legitimización y deslegitimación.

  20. Impact of Diagenetic Alterations on the Petrophysical and Multiphase Flow Properties of Carbonate Rocks Using a Reactive Pore Network Modeling Approach Impact des altérations diagénétiques sur les propriétés pétrophysiques et d’écoulement polyphasique de roches carbonates en utilisant une modélisation par l’approche réseau de pores

    Directory of Open Access Journals (Sweden)

    Algive L.

    2012-02-01

    replacing the original complex pore structure of real porous media by a conceptual network. The second step consists of resolving the governing equations of the precipitation and dissolution phenomena (i.e. reactive convection diffusion equation in the conceptual 3D pore network and deducing the local reactive fluxes and the motion of the fluid-solid interface. The third step consists of updating the new pore structure and calculating the new petrophysical properties of the modified porous media. Those steps are repeated in order to mimic a given diagenetic scenario. Finally, the multiphase flow properties of the current porous media are calculated. The impact of one diagenetic cycle of dissolution and precipitation on the pore networks’ heterogeneity and consequently on the petrophysical properties (i.e. porosity and permeability and multiphase flow properties (i.e. relative permeability and capillary pressure have been investigated. The permeability and porosity evolution during a given diagenetic cycle are calculated and analyzed as a function of the relevant dimensionless numbers (Peclet and Damköhler numbers that characterize the flow and reaction regime. The correlation between these numbers and the dissolved/precipitated layer thickness distribution is investigated. This work contributes to improve the understanding of the impact of dissolution and precipitation on permeability and porosity modification. Using the PNM approach, multiphase flow properties and permeability-porosity relationship have been determined for different reactive flow regimes. These relationships are relevant input data to improve the quality of reservoir simulation predictions. Les roches sédimentaires présentent souvent une structure porale hétérogène qui est intrinsèquement liée à la texture de la roche d’origine et aux modifications diagénétiques subies. Ces altérations sont régies par la texture de la roche d’origine, les fluides impliqués (et les interactions rock

  1. Rigid Holography and Six-Dimensional N=(2,0) Theories on AdS_5 times S^1

    CERN Document Server

    Aharony, Ofer; Rey, Soo-Jong

    2015-01-01

    Field theories on anti-de Sitter (AdS) space can be studied by realizing them as low-energy limits of AdS vacua of string/M theory. In an appropriate limit, the field theories decouple from the rest of string/M theory. Since these vacua are dual to conformal field theories (CFTs), this relates some of the observables of these field theories on AdS to a subsector of the dual CFTs. We exemplify this `rigid holography' by studying in detail the 6d N=(2,0) A_{K-1} superconformal field theory (SCFT) on AdS_5xS^1, with equal radii for AdS_5 and for S^1. We choose specific boundary conditions preserving sixteen supercharges that arise when this theory is embedded into Type IIB string theory on AdS_5xS^5/Z_K. On R^{4,1}xS^1, this 6d theory has a 5(K-1)-dimensional moduli space, with unbroken 5d SU(K) gauge symmetry at (and only at) the origin. On AdS_5xS^1, the theory has a 2(K-1)-dimensional `moduli space' of supersymmetric configurations. We argue that in this case the SU(K) gauge symmetry is unbroken everywhere in...

  2. A direct hybrid S{sub N} method for slab-geometry lattice calculations

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Davi J.M.; Barros, Ricardo C., E-mail: rcbarros@pq.cnpq.b [Universidade do Estado do Rio de Janeiro (IPRJ/UERJ), Nova Friburgo, RJ (Brazil). Programa de Pos-graduacao em Modelagem Computacional; Zani, Jose H. [Fundacao Educacional Serra dos Orgaos, Teresopolis, RJ (Brazil). Ciencia da Computacao

    2011-07-01

    In this work we describe a hybrid direct method for calculating the thermal disadvantage factor and the neutron flux distribution in fuel-moderator lattices. For the mathematical model, we use the one-speed slab-geometry discrete ordinates (S{sub N}) transport equation with linearly anisotropic scattering. The basic idea is to use higher order angular quadrature set in the highly absorbing fuel region (S{sub NF}) and lower order angular quadrature set in the diffusive moderator region (S{sub NM}) , i.e., N{sub F} > N{sub M}. We apply special continuity conditions based on the equivalence of the S{sub N} and P{sub N-1} equations, which characterize the hybrid model. Numerical results to a typical model problem are given to illustrate the accuracy and the efficiency of the offered hybrid method. (author)

  3. The effects of intracranial volume adjustment approaches on multiple regional MRI volumes in healthy aging and Alzheimer’s disease

    Directory of Open Access Journals (Sweden)

    Olga eVoevodskaya

    2014-10-01

    Full Text Available In neurodegeneration research, normalization of regional volumes by intracranial volume (ICV is important to estimate the extent of disease-driven atrophy. There is little agreement as to whether raw volumes, volume-to-ICV fractions or regional volumes from which the ICV factor has been regressed out should be used for volumetric brain imaging studies. Using multiple regional cortical and subcortical volumetric measures generated by Freesurfer (51 in total, the main aim of this study was to elucidate the implications of these adjustment approaches. Magnetic resonance imaging (MRI data were analyzed from two large cohorts, the population-based PIVUS cohort (N=406, all subjects age 75 and the Alzheimer disease Neuroimaging Initiative (ADNI cohort (N=724. Further, we studied whether the chosen ICV normalization approach influenced the relationship between hippocampus and cognition in the three diagnostic groups of the ADNI cohort (Alzheimer’s disease, mild cognitive impairment and healthy individuals. The ability of raw vs adjusted hippocampal volumes to predict diagnostic status was also assessed. In both cohorts raw volumes correlate positively with ICV, but do not scale directly proportionally with it. The correlation direction is reversed for all volume-to-ICV fractions, except the lateral and third ventricles. Most grey matter fractions are larger in females, while lateral ventricle fractions are greater in males. Residual correction effectively eliminated the correlation between the regional volumes and ICV and removed gender differences. The association between hippocampal volumes and cognition was not altered by ICV normalization. Comparing prediction of diagnostic status using the different approaches, small but significant differences were found. The choice of normalization approach should be carefully considered when designing a volumetric brain imaging study.

  4. 5S:n käyttöönotto Nomet Oy:ssä

    OpenAIRE

    Nummi, Janne

    2012-01-01

    Tämän opinnäytetyön aiheena on 5S-toimintamallin käyttöönotto Nomet Oy:n tuotannossa, Tampereen Vehmaisissa. Nomet on alihankintakonepaja, joka on erikoistunut lastuavaan työstöön. Yrityksessä on päätetty ottaa käyttöön Lean- valmistusfilosofiaan pohjautuvaa tuotannon uudistamista. 5S on yksi Leanin monista työkaluista, josta on hyvä lähteä alkuun. 5S:n päätavoitteena on parantaa tuotantoprosesseja siisteyden, järjestyksen ja standardisoinnin avulla. Työssä on esitelty kahdesta tuotannon ...

  5. Validation of N-myristoyltransferase as an antimalarial drug target using an integrated chemical biology approach

    Science.gov (United States)

    Wright, Megan H.; Clough, Barbara; Rackham, Mark D.; Rangachari, Kaveri; Brannigan, James A.; Grainger, Munira; Moss, David K.; Bottrill, Andrew R.; Heal, William P.; Broncel, Malgorzata; Serwa, Remigiusz A.; Brady, Declan; Mann, David J.; Leatherbarrow, Robin J.; Tewari, Rita; Wilkinson, Anthony J.; Holder, Anthony A.; Tate, Edward W.

    2014-02-01

    Malaria is an infectious disease caused by parasites of the genus Plasmodium, which leads to approximately one million deaths per annum worldwide. Chemical validation of new antimalarial targets is urgently required in view of rising resistance to current drugs. One such putative target is the enzyme N-myristoyltransferase, which catalyses the attachment of the fatty acid myristate to protein substrates (N-myristoylation). Here, we report an integrated chemical biology approach to explore protein myristoylation in the major human parasite P. falciparum, combining chemical proteomic tools for identification of the myristoylated and glycosylphosphatidylinositol-anchored proteome with selective small-molecule N-myristoyltransferase inhibitors. We demonstrate that N-myristoyltransferase is an essential and chemically tractable target in malaria parasites both in vitro and in vivo, and show that selective inhibition of N-myristoylation leads to catastrophic and irreversible failure to assemble the inner membrane complex, a critical subcellular organelle in the parasite life cycle. Our studies provide the basis for the development of new antimalarials targeting N-myristoyltransferase.

  6. MAINSTREAM TEACHERS’ ATTITUDE AND APPROACHES TO SUPPORT CHILDREN’S BILITERACY DEVELOPMENT IN AUSTRALIAN CLASSROOM CONTEXT

    Directory of Open Access Journals (Sweden)

    Muhammad Basri Jafar

    2010-08-01

    Full Text Available This article examines the role of mainstream teachers in supporting children’s biliteracy development and bilingualism in a public primary school where English is the medium of instruction. It reports a research conducted in a public primary school in Australia. The research employs a longitudinal ethnographic approach to collect data on how the teachers perceive biliteracy and the extent to which the approaches they adopt impact on their biliteracy and bilingualism development. The research result demonstrates that the more supportive the teachers for biliteracy development and bilingualism are, the more constructivist their teaching approach is and the more varied the activities they encouraged in their classrooms to create opportunities for biliteracy and bilingualism engagement and learning are.

  7. Construction of KbarN potential and structure of Lambda(1405) based on chiral unitary approach

    CERN Document Server

    Miyahara, Kenta

    2015-01-01

    Based on chiral unitary approach, we construct the realistic KbarN local potential, which is useful for the quantitative calculation of Kbar-nuclei. Since the resonance pole structure of the KbarN system seems important for the Kbar-nuclei and the spacial structure of Lambda(1405), we establish the construction procedure of the local potential paying attention to the scattering amplitude in the complex energy plane. Furthermore, for the quantitative study of the Kbar-nuclei, we consider the constraint from the recent experimental data measured by SIDDHARTA, which significantly reduces the uncertainty of the KbarN amplitude. With this new local potential, we estimate the spacial structure of Lambda(1405) and obtain the result indicating the meson-baryon molecular state of Lambda(1405).

  8. Transmisión de emociones, miedo y estrés infantil por hospitalización

    OpenAIRE

    Antonio Fernández-Castillo; Isabel López-Naranjo

    2006-01-01

    En este estudio descriptivo transversal se han examinado diversos aspectos relacionados con el estrés en la infancia durante la hospitalización en una muestra de 85 niños y sus correspondientes 85 padres, durante estancias breves en dos centros hospitalarios. Nuestra investigación ha intentado constatar la importancia mediadora de diversas variables de índole personal y familiar: la edad infantil, la valoración paterna de los miedos infantiles, la presencia de experiencias de h...

  9. Percepción de imagen país. Una aplicación a Nicaragua

    OpenAIRE

    2015-01-01

    El presente trabajo tiene como objetivo analizar el concepto de imagen percibida de Nicaragua, sus dimensiones, medición y principales aplicaciones en el área de Turismo, con el fin de identificar líneas de acción para el desarrollo del sector Turismo. Para ello, en una primera parte se realiza una revisión de la literatura académica existente, se analiza el concepto imagen país percibido desde el punto de vista del Marketing Turístico. En un segundo apartado se examinan las ca...

  10. Transmisión de emociones, miedo y estrés infantil por hospitalización

    OpenAIRE

    Antonio Fernández-Castillo; Isabel López-Naranjo

    2006-01-01

    En este estudio descriptivo transversal se han examinado diversos aspectos relacionados con el estrés en la infancia durante la hospitalización en una muestra de 85 niños y sus correspondientes 85 padres, durante estancias breves en dos centros hospitalarios. Nuestra investigación ha intentado constatar la importancia mediadora de diversas variables de índole personal y familiar: la edad infantil, la valoración paterna de los miedos infantiles, la presencia de experiencias de h...

  11. Põhja-Korea tõrjub nälga suure sõjaisuga / Heiki Suurkask

    Index Scriptorium Estoniae

    Suurkask, Heiki, 1972-

    2010-01-01

    Selgunud on, et Lõuna-Korea sõjalaeva uputas 26. märtsil Põhja-Korea torpeedo, Põhja-Korea ähvardab sanktsioonide korral sõjaga. Põhja-Korea on jõudnud näljahädani ning vajab uut sõjapaanikat, et püüda suunata rahva viha välisvaenlaste pihta

  12. Titanium nitride: A new Ohmic contact material for n-type CdS

    NARCIS (Netherlands)

    Didden, A.; Battjes, H.; Machunze, R.; Dam, B.; Van de Krol, R.

    2011-01-01

    In devices based on CdS, indium is often used to make Ohmic contacts. Since indium is scarce and expensive, suitable replacement materials need to be found. In this work, we show that sputtered titanium nitride forms an Ohmic contact with n-type CdS. The CdS films, deposited with chemical bath depos

  13. Põhja-Korea tõrjub nälga suure sõjaisuga / Heiki Suurkask

    Index Scriptorium Estoniae

    Suurkask, Heiki, 1972-

    2010-01-01

    Selgunud on, et Lõuna-Korea sõjalaeva uputas 26. märtsil Põhja-Korea torpeedo, Põhja-Korea ähvardab sanktsioonide korral sõjaga. Põhja-Korea on jõudnud näljahädani ning vajab uut sõjapaanikat, et püüda suunata rahva viha välisvaenlaste pihta

  14. Relación entre violencia de pareja y estrés parental en población mexicana

    Directory of Open Access Journals (Sweden)

    Carlos Adrián BRITO-TINAJERO

    2016-01-01

    Full Text Available Esta investigación surge como sub-producto del convenio de investigación UNTUAEMéx4 ; con el objetivo de explicar la relación que existe entre la violencia de pareja y el estrés parental en mujeres mexicanas a través de las escalas: Escala de Tácticas de conflicto y Escala de estrés parental a 319 madres o mujeres encargadas del cuidado de los niños(as dentro de los tres primeros años de primaria en educación pública del Estado de México. Se encontró positivamente correlacionada la Violencia de Pareja y el Estrés Parental de manera significativa en todos los factores de ambas escalas (p < 0.01 y p < 0.00. El 89.34% de las participantes reportó haber sufrido al menos un episodio de Violencia de Pareja e índices moderadamente bajos de Estrés Parental.

  15. INFECCIÓN POR PROTOZOARIOS EN INDIVIDUOS DE TITÍ BEBE LECHE -S. fuscicollis-, TITÍ CABEZA BLANCA -S. oedipus-, TITÍ ARDILLA -S. sciureus-, SURICATO -S. suricatta- Y WALLABIE DE BENNETT -M. rufogriseus-: DESCRIPCIÓN DE CASOS

    Directory of Open Access Journals (Sweden)

    G. L. K. López

    2014-01-01

    Full Text Available La toxoplasmosis es una de las zoonosis parasitarias más comunes y de especial atención en medicina humana y veterinaria en todo el mundo. Toxoplasma gondii comparte mu - chos de sus parámetros biológicos con otros parásitos apicomplexa, pero es único por su extremadamente amplio rango de huéspedes y su especificidad tisular. La susceptibilidad en especies de primates del Nuevo Mundo y diprotodontos a la infección por protozoarios es alta. Bajo condiciones de cautiverio la toxoplasmosis es una de las infecciones más comunes en macrópodos australianos. En el presente trabajo se exponen los hallazgos clínicos y postmortem de 11 individuos de primates ( Saguinus oedipus, S. fuscicollis, Saimiri sciureus , carnívoros ( Suricata suricatta y diprotodontos ( Macropus rufogriseus , de la Fundación Zoológica de Cali, diagnosticados con toxoplasmosis mediante métodos paraclínicos e histopatológicos. En la mayoría de los casos el cuadro clínico se caracterizó principalmente por disnea, secreción nasal espumosa y signos neurológicos. Los hallazgos más importantes de la necropsia fueron lesiones en pulmón, hígado y encéfalo. Los casos aquí descritos corresponden a cuadros clínicos de ocurrencia natural y permiten entender el desarrollo fisiopatológico y la presentación clínica de las infecciones por protozoarios en especies de fauna silvestre, a pesar de la falta de un diagnóstico definitivo mediante técnicas específicas de inmunohistoquímica para las distintas etiologías.

  16. Sex-specific patterns and differences in dementia and Alzheimer’s disease using informatics approaches

    Science.gov (United States)

    Ronquillo, Jay Geronimo; Baer, Merritt Rachel; Lester, William T.

    2016-01-01

    The National Institutes of Health Office of Research on Women’s Health recently highlighted the critical need for explicitly addressing sex differences in biomedical research, including Alzheimer’s disease and dementia. The purpose of our study was to perform a sex-stratified analysis of cognitive impairment using diverse medical, clinical and genetic factors of unprecedented scale and scope by applying informatics approaches to three large Alzheimer’s databases. Analyses suggested females were 1.5 times more likely than males to have a documented diagnosis of probable Alzheimer’s disease, and several other factors fell along sex-specific lines and were possibly associated with severity of cognitive impairment PMID:27105335

  17. The importance of a patient’s background in formulating a management approach

    Directory of Open Access Journals (Sweden)

    Anil Ojha

    2013-10-01

    Full Text Available Peptic ulcer disease is uncommon in childhood, with non-specific clinical features. A tendency to late diagnosis makes it more likely for a patient to present with complications. Here we discuss a child with low socio-economic status from a developing country who presented with severe anemia secondary to a bleeding duodenal ulcer. The case highlights the importance of the patient’s background in the formulation of a management approach. In some cases this may be intuitive to an experienced physician. However, we demonstrate this with a simple mathematical diagnostic model using disease prevalences which are tied to our individual patient’s circumstances. The model shows how the negative predictive value of a test can change according to the patient’s background. We also suggest that the best treatment option will be influenced by the patient’s circumstances. Our patient comes from Nepal, but the principles involved are universally applicable.

  18. Enhanced CO2 capture on graphene via N, S dual-doping

    Science.gov (United States)

    Li, Jieyuan; Hou, Meiling; Chen, Yanqiu; Cen, Wanglai; Chu, Yinghao; Yin, Shi

    2017-03-01

    N, S doped graphene-based materials have been recently recognized as promising adsorbents for CO2 capture, but understanding of the adsorption mechanism at the atomic level is still limited. Herein, the local structures and promotion mechanism of CO2 capture by N, S doped graphene were investigated by combining density functional theory and ab initio thermodynamics. A single vacancy defected graphene involving N, S dual-doping was found to be a superior adsorbent for CO2 capture under mild conditions (<100 °C, 1 atm). The enhanced CO2 adsorption performance should be ascribed to a charge delivery channel along the SN → CO2 path, leading to extra charge transfer from graphene to CO2. It is worth mentioning that the extra charge transfer was stimulated by the unique sp2 hybridization of pyridine N and further enhanced by S in N, S dual-doped graphene. A possible mechanism has been proposed to explain the high adsorption performance of CO2 by N, S dual-doped graphene, which offers insights for the design of new graphene-based adsorbents.

  19. Microstructural and tribological behavior of TiAlN/MoS2-Ti coatings

    Institute of Scientific and Technical Information of China (English)

    LI Yongliang; KIM Sunkyu

    2006-01-01

    A TiAlN/MoS2-Ti coating was developed to improve the tribological characteristics of a single TiAlN coating.The MoS2-Ti layer was deposited by a DC magnetron sputtering system on the hard TiAlN coated SKD-11 steel substrate.The titanium content in the MoS2-Ti layer was 11.3 at.% determined by EPMA. The surface morphology was observed by FE-SEM. The TiAlN layer exhibited excellent adhesion and hardness. However, the deposition of an MoS2-Ti layer on the TiAlN led to a significant improvement in tribological properties without affecting the adhesion to the substrate. The MoS2-Ti layer significantly decreased the friction coefficient of the TiAlN coating, and the drop was 48% after MoS2-Ti deposition. Also, the MoS2-Ti layer remarkably decreased the wear rate of the TiAlN coating.

  20. Inconel 718 süper alaşımının farklı gerilme ve sıcaklıklarda yüksek sıcaklık sürünme davranışının incelenmesi

    Directory of Open Access Journals (Sweden)

    Ergün Subaşı

    2016-04-01

    Full Text Available Bu çalışmada, havacılıkta yaygın olarak kullanılan Inconel 718 süper alaşımının sürünme davranışına sıcaklık ve gerilmenin etkileri incelenmiştir. Deneyler; 750°C, 800°C sıcaklıklarında ve 200-350MPa gerilme aralığında gerçekleştirilmiştir. Deneysel çalışma sonuçlarından, gerilme üssü (n, sürünme hızı (έ ve aktivasyon enerjisi (Q hesaplanmıştır. Hesaplanan sonuçlara göre; sürünme hızlarının artan gerilme ile arttığı, ayrıca sıcaklığın artmasıyla birlikte sürünme hızları çok daha fazla artmaktadır. Aynı şekilde, artan gerilme ile birlikte aktivasyon enerjisi artmaktadır. Deney sonuçlarından elde edilen gerilme üssü değerlerine göre; etkin deformasyon mekanizmasının dislokasyon sürünmesi olduğu tespit edilmiştir. Inconel 718 süper alaşımının kopma sürünme ömrünü tahmin etmek için, Larson Miller grafiği çizilmiştir. Bu grafikle, Inconel 718’in yüksek sıcaklık sürünme ömürleri hesaplanabilir.

  1. Modern comparative approach for carrier transport in InAlN/AlN superlattice device with characteristics and modelling using nitride (14N,15N) isotopes

    Science.gov (United States)

    Mazumdar, Kaushik; Ranjan, Rajeev Kumar; Shankar, Ravi; Priyadarshini, Bindu; Ghosal, Aniruddha

    2017-03-01

    As we all know that, the performance and characteristics of any semiconductor device are effected by change in operating temperature. The temperature dependencies of the transport properties of InAlN/Al14N15N have been investigated using theoretical and mathematical study. Here we have considered the Al14N15N with different ratio of 14N and 15N for the analysis owing to considerable interest in superlattice structures of large band gap semiconductors having various favourable material properties such as very high thermal conductivity, high carrier mobility and wide bandwidth operation. This paper deals with analysis of temperature effect on some of the device modelling parameters like carrier mobility and scattering.

  2. A Fuzzy Approach Using Generalized Dinkelbach’s Algorithm for Multiobjective Linear Fractional Transportation Problem

    Directory of Open Access Journals (Sweden)

    Nurdan Cetin

    2014-01-01

    Full Text Available We consider a multiobjective linear fractional transportation problem (MLFTP with several fractional criteria, such as, the maximization of the transport profitability like profit/cost or profit/time, and its two properties are source and destination. Our aim is to introduce MLFTP which has not been studied in literature before and to provide a fuzzy approach which obtain a compromise Pareto-optimal solution for this problem. To do this, first, we present a theorem which shows that MLFTP is always solvable. And then, reducing MLFTP to the Zimmermann’s “min” operator model which is the max-min problem, we construct Generalized Dinkelbach’s Algorithm for solving the obtained problem. Furthermore, we provide an illustrative numerical example to explain this fuzzy approach.

  3. Evaluación del programa de país: Argentina (1996-1999)

    OpenAIRE

    Banco Interamericano de Desarrollo (BID)

    2001-01-01

    Uno de los propósitos básicos de esta nota técnica (RE-246) es aportar información y análisis para la preparación del Documento de País para el próximo ciclo de programación 2001-2003. La revisión que se incluye en este documento abarca el último ciclo de programación, 1996-1999 y se focaliza en el estudio de aspectos prioritarios de la acción del Banco. El documento presenta una revisión de las características del proceso de programación, los préstamos otorgados y su implementación, y el est...

  4. A Study on Recent Approaches in Handling DDoS Attacks

    OpenAIRE

    Mukhopadhyay, Debajyoti; Oh, Byung-Jun; Shim, Sang-Heon; Kim, Young-Chon

    2010-01-01

    In this paper, we present a study on the recent approaches in handling Distributed Denial of Service (DDoS) attacks. DDoS attack is a fairly new type of attack to cripple the availability of Internet services and resources. A DDos attack can originate from anywhere in the network and typically overwhelms the victim server by sending a huge number of packets. Several remedial measures have been proposed by various researchers. This paper attempts to discuss the recent offerings to handle the D...

  5. Freedom and Communion: Sameness and Alterity Articulation in Gabriel Marcel’s Philosophy. Some Approaches

    OpenAIRE

    Grassi, Martín; Pontificia Universidad Católica Argentina y Universidad del Salvador-Área San Miguel

    2015-01-01

    In this paper we will try to show how Gabriel Marcel understands the junction between the self and the other as appears in his reflections on the opposition freedom-gift, on his critique of Sartre’s philosophy of freedom, and on metaphysical implications of love. These three approaches point out a way that leads to understand man’s tension between selfhood and alterity, in the heart of a fundamental communion which refer, ultimately, to the divine. Therefore, metaphysical and religious discou...

  6. Relación de apego en madres adolescentes y sus bebés canguro

    OpenAIRE

    Jenny Amanda Ortiz; Alicia Borré; Sonia Carrillo; Germán Gutiérrez

    2006-01-01

    Este estudio investigó el efecto de la edad materna y la participación en el Programa Madre Canguro (PMC) sobre el la relación de apego establecida en un grupo de madres y bebés de estrato socioeconómico bajo. Las díadas se agruparon dependiendo de, a) la edad de lasmadres al momento del parto (madres adolescentes y madres adultas); y b) la participación de los bebés en el PMC (bebés canguro y bebés no-canguro). La evaluación de las interacciones madre-bebé se llevó a cabo a través de observ...

  7. Why time matters: codon evolution and the temporal dynamics of dN/dS.

    Science.gov (United States)

    Mugal, Carina F; Wolf, Jochen B W; Kaj, Ingemar

    2014-01-01

    The ratio of divergence at nonsynonymous and synonymous sites, dN/dS, is a widely used measure in evolutionary genetic studies to investigate the extent to which selection modulates gene sequence evolution. Originally tailored to codon sequences of distantly related lineages, dN/dS represents the ratio of fixed nonsynonymous to synonymous differences. The impact of ancestral and lineage-specific polymorphisms on dN/dS, which we here show to be substantial for closely related lineages, is generally neglected in estimation techniques of dN/dS. To address this issue, we formulate a codon model that is firmly anchored in population genetic theory, derive analytical expressions for the dN/dS measure by Poisson random field approximation in a Markovian framework and validate the derivations by simulations. In good agreement, simulations and analytical derivations demonstrate that dN/dS is biased by polymorphisms at short time scales and that it can take substantial time for the expected value to settle at its time limit where only fixed differences are considered. We further show that in any attempt to estimate the dN/dS ratio from empirical data the effect of the intrinsic fluctuations of a ratio of stochastic variables, can even under neutrality yield extreme values of dN/dS at short time scales or in regions of low mutation rate. Taken together, our results have significant implications for the interpretation of dN/dS estimates, the McDonald-Kreitman test and other related statistics, in particular for closely related lineages.

  8. Neuropsychological findings in personality disorders: A. R. Luria’s approach

    OpenAIRE

    Pluzhnikov I.V.; Kaleda V.G.

    2015-01-01

    There is a lack of information concerning the features of cognitive processes in personality disorders, as well as the brain mechanisms of the pathogenesis of these diseases. Luria’s neuropsychological approach demonstrated its heuristicity in estimating the cognitive status of patients with mental disorders and can be employed to identify the brain bases of non-psychotic mental disorders (including personality disorders). The objective of this research is to study the features of neuroco...

  9. Sexuality in organizations : An approach based on Georges Bataille’s theory of eroticism

    OpenAIRE

    De March, François

    2014-01-01

    International audience; Purpose – This article aims to examine the theme of “sexuality in organizations” according to the theory of eroticism of Georges Bataille (1897-1962).Design/methodology/approach – The author reviewed Bataille’s essays in order to identify the salient points of his analysis of eroticism, before applying them to the organizations.Findings – The anthropologic notions of prohibition and transgression (antagonistic yet complementary) facilitate a different view of the oppos...

  10. Sleep and awakening disorders in Parkinson’s disease: comprehensive approach to therapy

    Directory of Open Access Journals (Sweden)

    Marina Romanovna Nodel

    2012-01-01

    Full Text Available The paper presents the specific features of the clinical presentation and pathophysiology of sleep and awakening disorders in patients with Parkinson’s disease (PD. It covers the current views of the role of chronobiological mechanisms in the regulation of sleep and awakening in PD. Major approaches to therapy for insomnia, para-, and hypersomnia in these patients are discussed. Data on the efficacy of melatonin in sleep and awakening disorders are given.

  11. Formación basada en competencias en educación sanitaria: aproximaciones a enfoques y modelos de competencia. [Outcome-based health education: Possible approaches and models of competence

    Directory of Open Access Journals (Sweden)

    Martinez-Clares, Pilar

    2008-11-01

    Full Text Available The great changes taking place in society today call into question traditional training, which is focused on the transmission of knowledge and training skills. Some experts suggest that the introduction of a competency-based approach to training has presented it with an avenue for modernization and cooperation with the needs of the organizational environment. The approach of Outcome Based Education is considered one of the most important changes in health education for the twenty-first century. This approach is predominant in higher education institutions around the world and is the method recommended by major governing bodies and evaluators of health education (or, in a narrower sense, medical education. Los grandes cambios que se están produciendo en la sociedad de hoy en día ponen en entredicho la formación tradicional, centrada en la transmisión de conocimientos y en el entrenamiento de ciertas habilidades. Algunos expertos apuntan que la introducción del enfoque de competencias ha significado para la formación una vía para la actualización y el acercamiento a necesidades del ambiente organizacional. El enfoque de Formación basada en Competencias (FBC, en adelante, más conocido en la literatura internacional como Out Come Based Education, es considerado uno de los cambios más importantes en la educación sanitaria para el siglo XXI. Este enfoque, es el enfoque educativo predominante en las instituciones de educación superior del mundo y el que recomiendan los principales organismos rectores y evaluadores de la educación sanitaria (o educación médica en un sentido mas restringido.

  12. El perfeccionamiento de la comunicación a través de la lectura

    Directory of Open Access Journals (Sweden)

    Esperanza Leyva-Hernández

    2012-01-01

    Full Text Available La inserción de las economías nacionales en el mercado global, la creciente globalización de la ciencia y de la cultura, que penetran en todos los campos de la actividad humana, donde se complejiza la comunicación, constituyen objeto de reflexión en el presente trabajo. Se destaca el interés creciente de los comunicadores sociales, lingüistas, sociólogos, psicólogos, en la última década del siglo XX, por investigar el proceso de la comunicación y de la lectura, como una de las vías para perfeccionarlas. Se explica la función comunicativa del lenguaje, donde el texto juega un rol fundamental, a partir del nuevo enfoque que asume su enseñanza. Se propone, además, una alternativa para perfeccionar la comunicación.

  13. La somatización como síntoma y como síndrome : una revisión del trastorno de somatización

    OpenAIRE

    López Santiago, José; Belloch, Amparo

    2002-01-01

    El uso del término somatización está muy extendido en el campo de la psicopatología y la clínica psicológica y psiquiátrica, a pesar de que su significado y delimitación diagnóstica no están claramente establecidos. El presente trabajo tiene com

  14. Molecular basis of substrate selection by the N-end rule adaptor protein ClpS

    Energy Technology Data Exchange (ETDEWEB)

    Román-Hernández, Giselle; Grant, Robert A.; Sauer, Robert T.; Baker, Tania A.; (HHMI)

    2009-06-19

    The N-end rule is a conserved degradation pathway that relates the stability of a protein to its N-terminal amino acid. Here, we present crystal structures of ClpS, the bacterial N-end rule adaptor, alone and engaged with peptides containing N-terminal phenylalanine, leucine, and tryptophan. These structures, together with a previous structure of ClpS bound to an N-terminal tyrosine, illustrate the molecular basis of recognition of the complete set of primary N-end rule amino acids. In each case, the alpha-amino group and side chain of the N-terminal residue are the major determinants of recognition. The binding pocket for the N-end residue is preformed in the free adaptor, and only small adjustments are needed to accommodate N-end rule residues having substantially different sizes and shapes. M53A ClpS is known to mediate degradation of an expanded repertoire of substrates, including those with N-terminal valine or isoleucine. A structure of Met53A ClpS engaged with an N-end rule tryptophan reveals an essentially wild-type mechanism of recognition, indicating that the Met(53) side chain directly enforces specificity by clashing with and excluding beta-branched side chains. Finally, experimental and structural data suggest mechanisms that make proteins with N-terminal methionine bind very poorly to ClpS, explaining why these high-abundance proteins are not degraded via the N-end rule pathway in the cell.

  15. cis-Bis[N′-(4-bromobenzoyl-N,N-dimethylthioureato-κ2O,S]copper(II

    Directory of Open Access Journals (Sweden)

    Gün Binzet

    2011-05-01

    Full Text Available The asymmetric unit of the title compound, [Cu(C10H10BrN2OS2], contains two independent complex molecules with almost identical conformations. Two S and two O atoms form the coordination environment of the Cu atom, resulting in a slightly distorted square-planar coordination. The S atoms are in a cis configuration. The crystal structure is stabilized by weak intermolecular C—H...Br hydrogen-bonding interactions.

  16. Inserción electroquímica de litio en la solución sólida Nb8-nW9+nO47 (1≤ n ≤6

    Directory of Open Access Journals (Sweden)

    Torres-Martínez, L. M.

    1999-12-01

    Full Text Available Electrochemical lithium insertion have been carried out in different compostions within the solid solution with general formula Nb8-nW9+nO47 (1≤ n ≤6. Through galvanostatic and potentiostatic techniques we have detected that lithium insertion proceeds by at least two reduction step. These process seem are relationship with the molar ratio Nb/W. The maximum lithium content reached leads to a specific capacity of 170 Ah/kg. Nevertheless, due to irreversible structural transformations in the matrix-host such capacity was lost after the first cycle. The detailed analysis about the insertion kinetic process and in situ X-ray diffraction experiments have been carried out in this work.A través de diferentes técnicas electroquímicas hemos realizado el estudio de la inserción de litio en una serie de composiciones pertenecientes a la solución sólida Nb8-nW9+nO47 (1≤ n ≤6. La inserción de litio procede al menos a través de dos procesos de reducción, los cuales guardan cierta relación con el contenido de Nb/W. La máxima cantidad de litio insertada conduce a capacidades específicas de la celda del orden de los 170 Ah/kg, la cual se pierde en sucesivos procesos de carga-descarga. Igualmente, hemos realizado un análisis de la cinética de los procesos de reducción y de los cambios estructurales que se suceden en la estructura del óxido de partida a medida que se inserta el litio a través de la difracción de rayos-X in situ.

  17. Reproducción en cautividad del lenguado senegalés (Solea senegalensis): inducción hormonal a la ovulación y obtención de huevos para la fecundación artificial

    OpenAIRE

    Rasines Pérez, Inmaculada

    2013-01-01

    El éxito del cultivo del lenguado senegalés, Solea senegalensis, está limitado por las disfunciones reproductivas de los ejemplares nacidos y criados en cautividad o de primera generación (F1). La presente tesis está dirigida a establecer un protocolo de inducción hormonal a la ovulación con análogos sintéticos de la hormona liberadora de gonadotropinas (GnRHa) y de extracción de los huevos por masaje abdominal para posteriormente, mediante fecundación artificial, obtener larvas de segunda ge...

  18. Las Cartas de relación de Hernán Cortés: El entorno de producción, la intitulación y la circulación (diagnosis)

    OpenAIRE

    Robles, Ivonne

    2015-01-01

    El entorno en el que se produce el texto de Cortés se contextualiza en este artículo. También destaca las motivaciones ideológicas que guían el proceso de titulación, la circulación y la censura de Cartas de Relación en todo. The environment in which Cortes' text is produced is contextualized in this article. It also highlights the ideological motivations that guide the process of titling, circulation and censorship of Cartas de Relación throughout.

  19. Las Cartas de relación de Hernán Cortés: El entorno de producción, la intitulación y la circulación (diagnosis)

    OpenAIRE

    Robles, Ivonne

    2015-01-01

    El entorno en el que se produce el texto de Cortés se contextualiza en este artículo. También destaca las motivaciones ideológicas que guían el proceso de titulación, la circulación y la censura de Cartas de Relación en todo. The environment in which Cortes' text is produced is contextualized in this article. It also highlights the ideological motivations that guide the process of titling, circulation and censorship of Cartas de Relación throughout.

  20. Centro Nacional de Produccións Limpia

    OpenAIRE

    Varela-Rojas, Irene; Vargas-Camareno, Maricruz; Roa-Gutiérrez, Floria; Quesada-Carvajal, Hilda

    2009-01-01

    El concepto de Produccións Limpia (P+L) se constituye en una vía efectiva para alcanzar eficiencia en el uso de recursos tales como agua, energía y materiales, permitiendo producir con costos más bajos y con menores niveles de contaminación. No obstante, el sector empresarial nacional, en especial las pequeñas y medianas empresas, enfrentan barreras de información, capacitación y asistencia técnica, que obstaculizan las acciones que pueden emprender para producir en armon...

  1. Procedimiento de descontaminación superficial de alimentos sólidos envasados

    OpenAIRE

    López Gómez, Antonio; López Cánovas, David Antonio

    2015-01-01

    Número de publicación: 2 534 529 Número de solicitud: 201530326 Procedimiento de descontaminación microbiana de alimentos sólidos envasados mediante aceites esenciales (AEs) que comprende una evaporación de los AEs a vacío, y una aplicación a vacío de los vapores de AEs sobre el alimento sólido situado en un envase abierto, en donde dichos vapores son arrastrados por aire o por una mezcla de gases de grado alimentario y conducidos hasta el recinto al vacío, en donde se encuentra el alim...

  2. DESARROLLO DE UN SISTEMA DE INFORMACIÓN PARA LA EMPRESA DATECSA S.A

    Directory of Open Access Journals (Sweden)

    Nelson Javier Reyes

    2013-09-01

    Full Text Available En el siguiente documento se presenta un estudio, implementación y análisis de un sistema para administrar la información de la empresa Colombiana Datecsa S.A. Inicialmente, se tienen en cuenta los requerimientos de los usuarios del sistema, a partir de esto se selecciona la opción tecnológica más viable, para su posterior implementación. Finalmente, se analiza la seguridad del sistema desarrollado, lo que conlleva a demostrar su robustez.

  3. (2,2′-Bipyridine-κ2N,N′bis(N-ethyl-N-methyldithiocarbamato-κ2S,S′zinc(II

    Directory of Open Access Journals (Sweden)

    Noorul Aisyah Abdul Ghafar

    2010-02-01

    Full Text Available The complete molecule of the title compound, [Zn(C4H8NS22(C10H8N2], is generated by crystallographic twofold symmetry, with the Zn atom lying on the rotation axis; the axis also bisects the central C—C bond of the 2,2′-bipyridine molecule. The metal atom is chelated by two S,S′-bidentate dithiocarbamate anions and the N,N′-bidentate heterocycle, resulting in a distorted cis-ZnN2S4 octahedral geometry. The methyl and ethyl groups of the anion are statistically disordered.

  4. Impact of N-plasma and Ga-irradiation on MoS2 layer in molecular beam epitaxy

    KAUST Repository

    Mishra, Pawan

    2017-01-03

    Recent interest in two-dimensional materials has resulted in ultra-thin devices based on the transfer of transition metal dichalcogenides (TMDs) onto other TMDs or III-nitride materials. In this investigation, we realized p-type monolayer (ML) MoS2, and intrinsic GaN/p-type MoS2 heterojunction by the GaN overgrowth on ML-MoS2/c-sapphire using the plasma-assisted molecular beam epitaxy. A systematic nitrogen plasma (N∗2N2*) and gallium (Ga) irradiation studies are employed to understand the individual effect on the doping levels of ML-MoS2, which is evaluated by micro-Raman and high-resolution X-Ray photoelectron spectroscopy (HRXPS) measurements. With both methods, p-type doping was attained and was verified by softening and strengthening of characteristics phonon modes E12gE2g1 and A1gA1g from Raman spectroscopy. With adequate N∗2N2*-irradiation (3 min), respective shift of 1.79 cm−1 for A1gA1g and 1.11 cm−1 for E12gE2g1 are obtained while short term Ga-irradiated (30 s) exhibits the shift of 1.51 cm−1 for A1gA1g and 0.93 cm−1 for E12gE2g1. Moreover, in HRXPS valence band spectra analysis, the position of valence band maximum measured with respect to the Fermi level is determined to evaluate the type of doping levels in ML-MoS2. The observed values of valance band maximum are reduced to 0.5, and 0.2 eV from the intrinsic value of ≈1.0 eV for N∗2N2*- and Ga-irradiated MoS2 layers, which confirms the p-type doping of ML-MoS2. Further p-type doping is verified by Hall effect measurements. Thus, by GaN overgrowth, we attained the building block of intrinsic GaN/p-type MoS2 heterojunction. Through this work, we have provided the platform for the realization of dissimilar heterostructure via monolithic approach.

  5. Detection of Bearing Faults of Induction Motor Using Park’s Vector Approach

    Directory of Open Access Journals (Sweden)

    Ratna Dahiya

    2010-08-01

    Full Text Available The reliability of an induction motor is of paramount importance in industrial, commercial, aerospace and military applications. Bearing play an important role in the reliability and performance of all motor systems. Due to close relationship between motor system development and bearing assembly performance, it is difficult to imagine the progress of modern rotating machinery without consideration of the wide application of bearing. Most faults arising in motors are often linked to bearing faults. This paper presents an experimental study to diagnose the bearing fault with help of Park’s vector approach. The experiment is conducted on 0.5 hp three phaseinduction motor. The bearing faults are replicated in the laboratory by drilling the outer and inner race of ball bearing with help of electric discharge machining. The LabVIEW software is used in the experiment to acquire the signal. The acquired signal is analyzed with Park vector approach. The current Park’s vector presentation is generated by programming in LabVIEW. The practical results show that Park’s Vector approach is an effective technique to diagnose the bearing fault at early stage.

  6. China’s Development Modeli:the Costs and Benefits of the Decentralization Approach to Transition

    Institute of Scientific and Technical Information of China (English)

    张晏; 王永钦; 章元; 陈钊; 陆铭

    2007-01-01

    This article provides a coherent framework within which to understand China’s development model,as well as the successes and the failures of China’s decentralization approach to reform.The combination of political centralization and economic decentralization provide local government with enough incentives to develop local economies,in particular incentives to promote market privatisation locally.However,the relative evaluation-based incentive schemes lead to inter- regional market segmentation,increasing inter-regional development gaps and the unequal provision of certain public goods.The success of early-stage reform can be attributed to the benefits of the decentralization approach.The next stage reform should however focus on minimizing the associated costs.China’s gradualist reform can be seen as a mechanism design issue under the control of central government.Therefore,it is essential to take both the costs and benefits of the decentralization approach into account in the design of the next-stage reform package.

  7. Synthesis of enantiomerically pure N-(S)-alpha-methylbenzyl-Beta-aminoalcohols by regio-and steroselective ring opening of epoxides

    Energy Technology Data Exchange (ETDEWEB)

    Anaya de Parrodi, C. [Departamento de Quimica y Biologia. Universidad de las Americas-Puebla, Puebla (Mexico); Juaristi, E. [Departamento de Quimica Centro de Investigaciones y Estudios Avanzados. Instituto Politecnico Nacional, Mexico (Mexico)

    1996-12-31

    A high yield, stereoselective ring opening of symmetrically substituted epoxides with (S)-alpha-methylbenzylamine to produce enantiomerically pure N-(S)-alpha-methylbenzyl-Beta-aminoalcohols is described. In addition, the regio selective ring opening of (R)-styrene oxide with (S)-alpha -methylbenzylamine and enantiomerically pure secondary amines. (S)-N-benzyl-, (S)-N-isopropyl-. (S)-N-[(2-biphenyl) methyl]-alpha-methylbenzylamine is described. (Author) 16 refs.

  8. Percepción de estrés en personal universitario

    OpenAIRE

    Angelines Díaz-Corchuelo; Eulogio Cordón-Pozo; Ramona Rubio-Herrera

    2015-01-01

    El objetivo del estudio es analizar el nivel de estrés percibido por el personal de administración y servicios (pas) de un campus científico-técnico de la Universidad de Granada. Se obtuvo una muestra de 194 mujeres y 156 hombres (80 % del total). Los niveles de percepción de estrés en los sujetos que participaron en el estudio fueron evaluados mediante la Escala de Estrés Percibido (pss-14). Se realizaron análisis estadísticos para establecer la relación entre el nivel de e...

  9. Trastornos generalizados del desarrollo: profundización en síndrome de Asperger

    OpenAIRE

    González Fernández, Paula

    2012-01-01

    El síndrome de Asperger es un trastorno generalizado del desarrollo caracterizado por disfunción social, intereses restringidos y comportamientos repetitivos. El diagnóstico debe sustentarse en una historia clínica completa y una correcta evaluación neuropsicológica. Es un síndrome sin cura, pero los síntomas propios y los secundarios a los trastornos comórbidos pueden mejorar con un diagnóstico precoz y una intervención correcta e individualizada

  10. Minä säveltäjänä : Luomisprosessin analysointi

    OpenAIRE

    Hannula, Ilari

    2015-01-01

    Opinnäytetyössäni analysoin omaa sävellysprosessiani ja suhtautumistani säveltämiseen. Tarkastelen kolmea jazzvaikutteista kappaletta, jotka olen säveltänyt sooloprojektilleni. Kappaleet ovat nimeltään Tibetan Dreaming, Sacred Mountain ja Through the Veil of Pale Moonlight. Analysoin kappaleiden syntytarinaa, sävellys- ja sovitusprosessin tyylikeinoja sekä äänitysprosessia. Käsittelen lisäksi omaa suhtautumistani säveltämiseen yleisellä tasolla: miksi säveltäjä säveltää ja mitkä hänen moti...

  11. S(x = F(s(t&e(x o el eclipse de la función simbólica en la sociedad

    Directory of Open Access Journals (Sweden)

    Barrientos Rastrojo, José

    2013-06-01

    Full Text Available Mauricio Beuchot and Mircea Eliade have carried out profound studies on symbols, which have opened up a discussion about the survival of symbols in contemporary social images. This paper aims to give backbone to this debate, to go through the concepts of the symbol by means of different approaches (sociology, cultural studies, anthropology, philosophy and linguistics, to take the initial argument from the material positions to formal ones and to draw up a conclusion which opens up a door to recovering symbol in the present day.Mauricio Beuchot y Mircea Eliade han realizado estudios profundos sobre el símbolo, que han abierto una disquisición vinculada a la pervivencia de este en los imaginarios sociales contemporáneos. El presente trabajo pretende vertebrar tal disputa, recorrer las concepciones del símbolo desde diversos abordajes disciplinares (sociología, estudios culturales, antropología, filosofía y lingüistica, transportar la disputa inicial desde los planteamientos materiales a los funcionales y formular una conclusión que constituya una puerta de entrada a la restitución del símbolo en la actualidad.

  12. Bis[N-benzyl-N-(2-phenylethyldithiocarbamato-κ2S,S′]lead(II

    Directory of Open Access Journals (Sweden)

    E. Sathiyaraj

    2012-09-01

    Full Text Available The molecule of the title compound, [Pb(C16H16NS22], is located on a twofold rotation axis, which runs through the PbII atom. The two dithiocarbamate ligands coordinate the metal in a pyramidal configuration through the S atoms. The two phenyl rings of each dithocarbamate ligand are aligned at a dihedral angle of 78.4 (1°. The molecular conformation is stabilized by intramolecular C—H...S interactions.

  13. Occurrence of N-nitrosamines in U.S. freshwater sediments near wastewater treatment plants.

    Science.gov (United States)

    Gushgari, Adam J; Halden, Rolf U; Venkatesan, Arjun K

    2017-02-05

    In the present study, 40 freshwater sediments collected near 14 wastewater treatment plants (WWTPs) across the United States were analyzed for eight N-nitrosamines by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Three N-nitrosamines were detected for the first time in freshwater sediments in units of ng/g dry weight at the specified detection frequency: N-nitrosodibutylamine (NDBA; 0.2-3.3; 58%), N-nitrosodiphenylamine (NDPhA; 0.2-4.7; 50%), and N-nitrosopyrrolidine (NPYR; 3.4-19.6; 18%). At least one N-nitrosamine was detected in 70% (28/40) of sediments analyzed. Non-detect values in units of ng/g dw were obtained for N-nitrosodimethylamine (NDMA; N-nitrosomethylethylamine (NMEA; N-nitrosodiethylamine (NDEA; N-nitroso-di-n-propylamine (NDPA; N-nitrosopiperidine (NPIP; N-nitrosamine occurrences in sediment: NDBA and NDPhA were positively correlated with bulk water ammonia and pH levels, and NPYR with sediment content of organic carbon and iron. Interestingly, N-nitrosamine occurrences up- and downstream of WWTPs were statistically indistinguishable (p>0.05). This is the first report on the occurrence of the carcinogenic N-nitrosamines NDBA, NDPhA, and NPYR in U.S. freshwater sediments. Discovery of this phenomenon warrants further research on the compounds' origin, environmental persistence, aquatic toxicity, and risks posed.

  14. Oclusión y estrés en el síndrome dolor disfunción temporo-mandibular

    OpenAIRE

    María del Carmen García Cubillas; Yusimí Pérez Corso

    2015-01-01

    Se reporta el caso de una paciente femenina de 35 años con síndrome dolor disfunción temporo-mandibular, cuyo motivo de consulta fue el dolor relacionado con el lado no habitual de masticación y de dormir. Los datos fueron tomados de su historia clínica inicial. El diagnóstico se realizó fundamentalmente por el método clínico. Para ello se hizo interrogatorio y el examen clínico de músculos, articulaciones temporo-mandibulares y oclusión. Se detectaron como posibles causas el estrés y una int...

  15. Situación de la gestión de residuos sólidos en las municipalidades de Costa Rica: gestión ambiental municipal

    Directory of Open Access Journals (Sweden)

    Lilliana Gaviria Montoya

    2008-05-01

    Full Text Available Este artículo presenta algunos de los resultados del I Encuentro Nacional de Municipalidades en torno al manejo adecuado de los desechos sólidos municipales, que se realizó los días 20 y 21 de junio del año 2005 en la municipalidad de Cartago. Este es la continuación del artículo “Situación de la Gestión de Residuos Sólidos en las Municipalidades de Costa Rica: recolección , disposición y recuperación”. En este nuevo artículo se presentan los resultados de la evaluación de la gestión ambiental municipal para lo cual se consideraron los temas de educación ambiental, sistemas de gestión ambiental dentro de la municipalidad, presencia de comisión ambiental municipal, existencia de una oficina de gestión ambiental y mecanismos de rendición de cuentas del quehacer ambiental.

  16. Measurement of the 33S(n,α) cross-section at n_TOF(CERN): Applications to BNCT

    Science.gov (United States)

    Sabaté-Gilarte, Marta; Praena, Javier; Porras, Ignacio; Quesada, José Manuel; Mastinu, Pierfrancesco

    2016-01-01

    Aim The main purpose of this work is to present a new (n,α) cross-section measurement for a stable isotope of sulfur, 33S, in order to solve existing discrepancies. Background 33S has been studied as a cooperating target for Boron Neutron Capture Therapy (BNCT) because of its large (n,α) cross-section in the epithermal neutron energy range, the most suitable one for BNCT. Although the most important evaluated databases, such as ENDF, do not show any resonances in the cross-section, experimental measurements which provided data from 10 keV to 1 MeV showed that the lowest-lying and strongest resonance of 33S(n,α) cross-section occurs at 13.5 keV. Nevertheless, the set of resonance parameters that describe such resonance shows important discrepancies (more than a factor of 2) between them. Materials and methods A new measurement of the 33S(n,α)30Si reaction cross-section was proposed to the ISOLDE and Neutron Time-of-Flight Experiments Committee of CERN. It was performed at n_TOF(CERN) in 2012 using MicroMegas detectors. Results In this work, we will present a brief overview of the experiment as well as preliminary results of the data analysis in the neutron energy range from thermal to 100 keV. These results will be taken into account to calculate the kerma-fluence factors corresponding to 33S in addition to 10B and those of a standard four-component ICRU tissue. Conclusions MCNP simulations of the deposited dose, including our experimental data, shows an important kerma rate enhancement at the surface of the tissue, mainly due to the presence of 33S. PMID:26933393

  17. Enfoques de investigación sostenible, ecologista y productivista: influencias en los científicos(as Research approaches sustainable, ecological and productivist: influences on scientists

    Directory of Open Access Journals (Sweden)

    Luis Reyes-Muro

    2011-02-01

    Full Text Available Los científicos(as agropecuarios(as están influenciados(as por diversos factores para definir su enfoque de investigación. El objetivo de este trabajo fue identificar aspectos demográficos y profesionales, institucionales e influencias internas-externas asociados al enfoque sostenible, ecologista o productivista de los científicos(as en Aguascalientes, México en 2008. Los enfoques fueron sometidos a un análisis de correlación con 44 factores de influencia. El enfoque sostenible correlacionó positivamente con la especialidad, la solución de problemas de interés institucional, investigación en terrenos de productores e investigación en sistemas de producción y negativamente con investigación básica y biotecnología. El enfoque ecologista correlacionó positivamente con la opinión del grupo interdisciplinario en la definición del problema a investigar. El enfoque productivista correlacionó positivamente con la especialidad, opinión del usuario y colegas en la definición del problema, estudios en terrenos de productores y en la estación experimental, trabajos por componente tecnológico y con la objetividad del investigador(a, y negativamente con la disciplina ecología. El modelo de regresión logística para la investigación con enfoque sostenible se explica por el origen de los investigadores(as, estancias de investigación, tipo de institución, fuente de financiamiento, investigación por demanda del usuario y prioridad institucional, trabajo interdisciplinario, estudios tanto en sistemas de producción como por componente tecnológico. El modelo ecologista se explica por las estancias de investigación, aprobación del proyecto por un comité técnico, investigación en terrenos de productores, trabajo interdisciplinario y estudios en sistemas de producción. El modelo productivista tuvo las variables explicatorias tipo de institución y trabajo en sistemas de producción.Agricultural scientists are influenced by several

  18. (Bipyridine-κ2N,N′chlorido[N-(2-hydroxyethyl-N-isopropyldithiocarbamato-κ2S,S′]zinc(II

    Directory of Open Access Journals (Sweden)

    Fatin Allia Mohamad

    2012-07-01

    Full Text Available The ZnII atom in the title compound, [Zn(C6H12NOS2Cl(C10H8N2], is coordinated by a chelating N-2-hydroxyethyl-N-isopropyldithiocarbamate ligand, a 2,2′-bipyridine ligand and a Cl atom. The resulting ClN2S2 donor set defines a distorted square-pyramidal coordination geometry. Helical supramolecular chains sustained by O—H...S hydrogen bonds and propagating along the b axis feature in the crystal packing. A three-dimensional architecture is stabilized by C—H...O, C—H...S and C—H...Cl interactions.

  19. Un estudio longitudinal de las creencias sobre síntomas en hipertensión

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    Genoveva Granados-Gámez

    2015-01-01

    Full Text Available Se realizó un estudio para evaluar creencias sobre síntomas relacionados con la hipertensión y el tiempo transcurrido desde el diagnóstico. Una muestra elegida al azar de pacientes con hipertensión (media de edad 53,27 años, rango 20-65; 67% mujeres se dividió en cuatro grupos de acuerdo al tiempo transcurrido desde el diagnóstico. Se entrevistó a todos los pacientes (N = 171 al comienzo del estudio (evaluación inicial y 12 meses después (evaluación final. A los pacientes que no informaron creencias en síntomas (n = 75 se les entrevistó cada tres meses de acuerdo a un programa de seguimiento. Los resultados indicaron que en la evaluación inicial el 56% de los pacientes informó creencias en síntomas, elevándose al 77% en la evaluación final (p < 0,001, y diferencias significativas entre los grupos con menor y mayor tiempo desde el diagnóstico. El análisis longitudinal del grupo de pacientes de reciente diagnóstico mostró que el primer año es el período crítico para la emergencia de creencias en síntomas, información que resulta clave para planear la prevención. Los profesionales de la salud deberían prestar atención a la emergencia de creencias en síntomas dado que pueden afectar negativamente a la adherencia al tratamiento.

  20. Optimální návrh nízkofrekvenčních sítí

    OpenAIRE

    Balák, Dušan

    2014-01-01

    Tato práce se zabývá návrhem a optimalizací sítí nízkého napětí v administrativní budově. Práce je rozdělena do dvou částí, na teoretickou a praktickou část. Teoretická část popisuje hlediska, na základě kterých postupujeme při navrhování elektrických nízkofrekvenčních sítí, se zaměřením na zkratové proudy a jejich účinky. Zmiňuje ekonomickou optimalizaci průřezu silových kabelů, pořizovací a provozní náklady a další okolnosti související s optimálním dimenzováním a jištěním elektrických zaří...